Cnc Lathe

This project employs the FLIR A70 thermal camera to control the temperature within an industrial chamber designated for cooling a CNC lathe. The selected configuration strikes an optimal balance between high thermal resolution (640 × 480 pixels) and adequate field of view, enabling uniform and accurate monitoring of critical thermal zones, which is vital for maintaining machining quality and thermal stability in CNC processes. The camera's compatibility with industrial communication protocols and seamless integration with PLC / Ladder logic enables precise, responsive, and reliable automation of the cooling system. This sensor selection underscores the strategic role of thermal measurement in enhancing operational efficiency, dimensional stability, and process safety.

Further, I would like to thank Edgar Alien Tools Limited, Sheffield, for the provision of the powder metallurgy high speed steel inserts and the use of their Plansee reactor for the chemical vapour deposition of the titanium carbonitride coatings. Thanks are also due to Diffusion Alloys Limited, Hatfield, for their assistance with aspects of the construction of the laboratory-scale CVD reactor. I wish to thank the technical staff, particularly Mr. K. Ellison and Mr. C. Lines, and the departmental secretaries of the Institute of Polymer Technology and Materials Engineering for all their help and kindness shown to me during the course of this work. I am especially grateful to Mr. F. Page for his help in obtaining many of the SEM micrographs in this thesis. Finally, I would like to thank my dear husband, Sajed, for all his patience, understanding and support throughout the writing of this thesis, without him I would not have achieved this goal. I am also grateful to Shumaila, Tayyauba, Iqbal and Samar whose cheerfulness made this aspect of the work enjoyable. A detailed study has been made of the atmospheric pressure chemical vapour deposition (CVD) of aluminium oxide (AlP3) coatings on powder metallurgy (PM) BT42 grade high speed steel (HSS) indexable cutting tool inserts. To facilitate this, a laboratory-scale CVD reactor was initially designed and purpose-built. The literature on the effect of process parameters on Al 2 0 3 coatings chemically vapour deposited on cemented carbide substrates was comprehensively surveyed. With reference to deposition conditions quoted in this literature, a series of trial AI 2 0 3 coating runs were then performed using uncoated and TiN, TiC and Ti(C,N) precoated PM HSS inserts. Concurrently, modifications to the laboratory-scale CVD reactor were made. Eventually, deposition conditions were established under which a preliminary a -A1 2 0 3 coating could be deposited on the PM HSS inserts and, in the case of the Ti(C,N) precoated inserts only, substantially retained during the obligatory post-coating HSS substrate heat treatment. The effect of the absence/presence and type of precoating on the CVD of AI 2 0 3 coatings on the PM HSS inserts are discussed. Subsequent coating runs were carried out only on Ti(C,N) precoated inserts. The characteristics of the preliminary AlP, coating on the Ti(C,N) precoated PM HSS inserts were determined, both before and after the obligatory HSS substrate heat treatment, using an established characterisation procedure. This involved the following techniques: X-ray diffraction, Auger electron spectroscopy, optical microscopy, fractography, scanning electron microscopy, microhardness testing, profilometry and scratch-adhesion testing. Although many of the characteristics of the preliminary AI 2 0, coating were found to be inferior to those presented in the literature, they were also established to be essentially unaffected by the post-coating HSS substrate heat treatment. To im prove upon the preliminary AI 2 0 3 coating, the effect of two of the most important CVD process parameters quoted in the literature; C0 2 JH 2 mole ratio and Alel 3 concentration, on the characteristics of Al 2 0, coatings chemically vapour deposited on the Ti(C,N) precoated PM HSS inserts was investigated. Both parameters were found to have a significant effect on AI 2 0 3 coating characteristics. The reasons for this are discussed in detail.

The benefits of cutting fluids in machining are well known, but their use is accompanied by health and environment hazards. Moreover, strict environmental regulations make the manufacturers to switch over to dry turning, which is not feasible during machining of sticky material like stainless steel and Inconel etc. Therefore, the use of minimal quantities of lubricant (MQL) can be regarded as an alternative solution and a step towards green machining. In the present investigation an attempt has been made to explore the potential of MQL turning of stainless steel with coated carbide cutting tool. Turning under MQL conditions has shown superior results (in terms of flank wear and machined surface roughness) over wet and dry turning. Signal to noise (S/N) ratio as per Taguchi design revealed speed and MQL as significant parameters for minimizing flank wear and surface roughness, whereas feed can be set within range. The optimum combination of parameters are cutting speed (58 m/min), feed rate (0.06 mm/rev.) and MQL flow rate (100 mL/h) for flank wear and cutting speed (23 m/min), feed rate (0.07 mm/rev.) and MQL flow rate (150 mL/h) for surface roughness. Taguchi optimized conditions were validated through multiple response optimization using desirability function.

A comprehensive investigation has been conducted on the settings for the turning operation of SS 304. This study utilizes the Grey-Based Taguchi method to explore the multi-objective optimization of the turning process, aiming to determine the optimal combination of settings that results in the shortest production time and the longest tool life. The parameters examined include feed rate, cutting speed, and depth of cut. To address the multi-response optimization challenge, nine experimental runs were performed based on Taguchi's L9 orthogonal array, followed by a Grey relational analysis. The Grey relational grade value was employed to ascertain the most effective parameter levels. Additionally, the analysis of variance (ANOVA) will play a crucial role in identifying the key parameters among speed, feed, and cut depth.

Tato diplomová práce je zaměřena na přípravu výroby předního MTB náboje a použití počítačového programu SinuTrain 4.7. Práce má čtyři tematické části. V první části je popis softwaru SinuTrain a náboje. Další část se zabývá konstrukcí náboje a výběrem materiálu. Ve třetí části je popsána technologie výroby náboje a výběr stroje s nástroji. Poslední část je o práci se softwarem SinuTrain a výsledcích simulace.This Master's thesis is focused on technical preparation of the MTB front wheel hub and application of SinuTrain 4.7 computer software. The thesis is divided into four thematic parts. The first part introduces the SinuTrain software and briefly describes the MTB wheel hub. The next section contains the hub design and selection of the suitable material for this component. The third part describes production technologies and selection of the turning machine with suitable tools. The last chapter deals with SinuTrain 4.7 software usage and also presents the results of the produc...

This paper is concerned with the variations in the specific cutting pressure with TiAlNCathodic-arc PhysicalVapor deposition (CAPVD) coated inserts while machiningAISI 1040 carbon steel. To reduce the cost and to make the process environmentally safe, dry cutting is chosen. Coated and uncoated carbide tools and different cutting conditions were tested in dry condition. Cutting forces were recorded at different conditions and specific cutting pressure is calculated. The adhesion bond of the coatings is analyzed using ScanningElectronMicroscopy (SEM).Comparisonwasmade between coated and uncoated carbide tools under the same conditions of machining.

This is the transforming era in which human involvement is going to be eliminate day by day and computer controlled machines have to be performed all the work to remove human idleness and fatigue. Aluminium is essentially used in aircraft industry, mainly in fighter planes and space shuttles because of its high strength and very light weight. The aim of this paper is to explain the Taguchi method to find the best process parameters and improved quality results in incremental sheet forming (ISF). Taguchi technique is used to investigate the variation in number of experiments, parameters and focus on acceptance in improved quality of the workpiece. The optimum possible performance of parameters is obtained by determining the optimum combination of design factors by this technique. The present work was focused on design of experiment by using L 9 Orthogonal Array (OA) on the different steps for optimal values by conducting machining on CNC machining centre. Analysis of variance (ANOVA)...

This is the transforming era in which human involvement is going to be eliminate day by day and computer controlled machines have to be performed all the work to remove human idleness and fatigue. Aluminium is essentially used in aircraft industry, mainly in fighter planes and space shuttles because of its high strength and very light weight. The aim of this paper is to explain the Taguchi method to find the best process parameters and improved quality results in incremental sheet forming (ISF). Taguchi technique is used to investigate the variation in number of experiments, parameters and focus on acceptance in improved quality of the workpiece. The optimum possible performance of parameters is obtained by determining the optimum combination of design factors by this technique. The present work was focused on design of experiment by using L 9 Orthogonal Array (OA) on the different steps for optimal values by conducting machining on CNC machining centre. Analysis of variance (ANOVA)...

The benefits of cutting fluids in machining are well known, but their use is accompanied by health and environment hazards. Moreover, strict environmental regulations make the manufacturers to switch over to dry turning, which is not feasible during machining of sticky material like stainless steel and Inconel etc. Therefore, the use of minimal quantities of lubricant (MQL) can be regarded as an alternative solution and a step towards green machining. In the present investigation an attempt has been made to explore the potential of MQL turning of stainless steel with coated carbide cutting tool. Turning under MQL conditions has shown superior results (in terms of flank wear and machined surface roughness) over wet and dry turning. Signal to noise (S/N) ratio as per Taguchi design revealed speed and MQL as significant parameters for minimizing flank wear and surface roughness, whereas feed can be set within range. The optimum combination of parameters are cutting speed (58 m/min), feed rate (0.06 mm/rev.) and MQL flow rate (100 mL/h) for flank wear and cutting speed (23 m/min), feed rate (0.07 mm/rev.) and MQL flow rate (150 mL/h) for surface roughness. Taguchi optimized conditions were validated through multiple response optimization using desirability function.

Cement concrete is an adaptable building development material in structural designing and it is likewise one of the world's most broadly utilized development material around the globe in all development ventures and in numerous development applications. Essentially cement concrete is a composite blend of concrete, very much evaluated fine totals and coarse totals, water and admixtures. Development exercises and activities are expanding the world over which has come about into the extreme extraction and use of normally accessible materials like common waterway sand, stones and shakes, lime, earth, water and so forth. As of now the issues confronted by the utilization of cement concrete incorporates popularity of concrete solid, expense of bond and solid making materials, contamination, over the top extraction and use of common stream sand and stones, water and so forth. Since the sand is as a rule widely extricated from the waterway bed stores, it is exhausting at a speedier rate...

Bakalářská práce se zabývá problematikou upínacích přípravků pro tvarově složitější součásti. Cílem práce bylo navrhnout způsob upínání pro konkrétní součást vyráběnou na CNC obráběcím centru s ohledem na maximalizaci efektivity celého procesu. Výstupem je úprava komerčně dostupného upínacího systému tak, aby vyhovoval zadaným požadavkům. Míra efektivity a tím i hospodárnosti celého obráběcího procesu je potom určena výpočty strojních časů, které ukázaly, že série se vyrobí v požadovaném termínu. Práce mimo jiné poskytuje přehled v oblastech používaných materiálů v automobilovém průmyslu, používaných obráběcích centrech v tomto odvětví a v neposlední řadě také přehled základních způsobů upínání a jejich zásad.The bachelor thesis deals with clamping fixtures problematics for parts with difficult shapes. It aims to design an effective way of clamping of a part machined on CNC machining centre. The output is an adjustment of commercially available clamping system to suit requirements o...

V této práci jsou zpracovány základní zákony a poznatky týkající se vesmírných letů na oběžnou dráhu okolo Země a také je zde vypracován návod pro začínající uživatele, kteří chtějí pracovat s programem GMAT (General Mission Analysis Tool), což je program sloužící k navrhování vesmírných misí. V závěrečné části práce je též použití programu předvedeno na konkrétním příkladu mise družice (CubeSat) na geostacionární oběžnou dráhu. V této části je popsán postup práce, jednotlivé podstatné funkce programu a možnosti a způsob práce v něm. Na závěr jsou vyhodnoceny grafické a datové výstupy ze simulace. Výstupem práce je tedy komplexní charakteristika základů problému návrhu vesmírných misí a stručný návod pro práci se softwarem GMAT, který lze v budoucnu využít ve výuce.In this work, there are basic laws and knowledge relating to space flights into an orbit around the Earth. Also, there are instructions for beginners, who want to work with the GMAT program (General Mission Analysis Tool)...

Dokument pojednává o návrhu vrtacích nástrojů za pomocí CAD a CAE technologií. Nejprve jsou stručně nastíněny různé postupy tvorby 3D modelů vrtacích nástrojů, zmíněny možnosti měření jejich silového zatížení při vrtání, je uveden popis mechanismu tvorby třísky a následně je prezentován přehled nejpoužívanějších explicitních (síťových) metod konečných prvků využívaných pro simulace obrábění. Pro tuto práci byla vybrána bezsíťová metoda SPH, která i přes to, že je schopna velmi dobře zvládat velké deformace a přetvoření materiálu, není pro simulace obrábění téměř využívána a v dostupných publikacích lze nalézt pouze informace týkající se simulací ortogonálního obrábění. Demonstrována je na příkladu simulace ortogonálního obrábění hliníkové slitiny A2024-T351, která zároveň slouží jako výchozí bod pro simulace vrtání pomocí metody SPH. Následuje popis návrhu, simulací a testování prototypů nových vrtacích nástrojů - tříbřitých a dvoubřitých vrtáků s vnitřním odvodem třísky, přičemž po...

Příspěvek se zabývá problematikou preventivního navařování a údržby tramvajových srdcovek s mělkým žlábkem. Příspěvek představuje hlavní vlivy působící na vývoj ojetí a deformace srdcovek s mělkým žlábkem, které jsou charakteristické postupným úbytkem materiálu a změnou geometrie žlábků. Příspěvek předkládá případovou studii dlouhodobě sledované tramvajové srdcovky s mělkým žlábkem na lokalitě Praha-Výtoň, na které je demonstrován typický vývoj stavu žlábků srdcovky v čase až do času její preventivní údržby navařením a následný vývoj po provedené údržbě a jeho srovnání s původním stavem nové srdcovky. Příspěvek se dále blíže zaměřuje na samotný preventivní zásah navařením a reprofilaci žlábků během této preventivní údržby.

Příspěvek se zabývá problematikou preventivního navařování a údržby tramvajových srdcovek s mělkým žlábkem. Příspěvek představuje hlavní vlivy působící na vývoj ojetí a deformace srdcovek s mělkým žlábkem, které jsou charakteristické postupným úbytkem materiálu a změnou geometrie žlábků. Příspěvek předkládá případovou studii dlouhodobě sledované tramvajové srdcovky s mělkým žlábkem na lokalitě Praha-Výtoň, na které je demonstrován typický vývoj stavu žlábků srdcovky v čase až do času její preventivní údržby navařením a následný vývoj po provedené údržbě a jeho srovnání s původním stavem nové srdcovky. Příspěvek se dále blíže zaměřuje na samotný preventivní zásah navařením a reprofilaci žlábků během této preventivní údržby.

The article deals with the issue of preventive welding and maintenance of tramway shallow crossing. The article presents the main influences the development of head loss and deformation of shallow crossing which are characterized by gradual loss of material and change in the geometry of grooves. The article presents a case study of a long-term monitored tramway shallow crossing in the locality od Prague Vyton which demonstrates typical development of condition of grooves of tramway shallow in time to its preventive maintenance by welding and next development after maintenance and its comparison with the original geometry of new tramway shallow. The article presents also preventive maintenance by surface welding and reprofiling grooves during this preventive maintenance.

Coated tool inserts can be considered as the backbone of machining processes due to their wear and heat resistance. However, defects of coating can degrade the integrity of these inserts and the number of these defects should be minimized or eliminated if possible. Recently, the advancement of coating processes and analytical tools open a new era for optimizing the coating tools. First, an overview is given regarding coating technology for cutting tool inserts. Testing techniques for coating layers properties, as well as the various coating defects and their assessment are also surveyed. Second, it is introduced an experimental approach to examine the possible coating defects and flaws of worn multicoated carbide inserts using two important techniques namely scanning electron microscopy and atomic force microscopy. Finally, it is recommended a simple procedure for investigating manufacturing defects and flaws of worn inserts.

In this paper, a lathe with continuous variator of high speed and dynamic absorber is studied. The machine, which is a complex system with a great number of freedom degrees, has a corresponding number of freedom degrees, which is why in the dynamic study, there will be taken into account only those vibratory modes that, according to the required precision and the main purpose, have a great influence in the development of the studied vibratory phenomenon.

1,2,3 Rajasthan institute of Engineering and Technology, Jaipur, Rajasthan Abstract— In this paper we have study on CNC end milling, o affect of various machining parameters like, tool feed (mm/min), speed of tool (rpm), diameter of tool (mm) and depth of cut (mm) .this paper is the result of an experiment conducted on AL 6351 – T6 material with three levels and four factors to optimize process parameter and surface roughness. In this paper we have used a L9 (3*4) Taguchi standard orthogonal array for the purpose of designing experiment (DOE).For the purpose of variation calculation we have used Analysis of variance (ANOVA) method. The result of the experiment is quality product generation at the end, which contribute in the higher and quality productivity. In this experiment we were found that order of significant of main parameter decreasing order is Tool feed, Tool speed and Depth of cut.

In this paper, a lathe with continuous variator of high speed and dynamic absorber is studied. The machine, which is a complex system with a great number of freedom degrees, has a corresponding number of freedom degrees, which is why in the dynamic study, there will be taken into account only those vibratory modes that, according to the required precision and the main purpose, have a great influence in the development of the studied vibratory phenomenon.

50 s. :obr., tab., grafy +CD ROMTato bakalářská práce shrnuje základní poznatky o procesních kapalinách, slitinách hliníku a drsnosti povrchu. Porovnává procesní kapaliny od různých světových výrobců na technologii čelního frézování slitiny hliníku. Hodnotícím kritériem byl vliv procesních kapalin na drsnost obrobeného povrchu a druh vzniklých třísek při obrábění. Výsledky této bakalářské práce dokazují, že procesní kapaliny nemají přílišný vliv na drsnost povrchu a tvar třísek po frézování slitiny hliníku

This bachelor's thesis deals with a detail description of authomatic tools change and automatic workpieces change of by CNC machines. Also it describes all matters connected with the issue, as types of bins, ways of clamping of tools and workpieces in the machine and possibilities of manipulation with tools and workpieces. This way dear and attentive reader gets wide look at the possibilities of realization of authomatic tools change and authomatic workpieces change. Author puts deeper emphasis at the actuallity of constructions and methods by these types of manufacturing automation at CNC machines

Práce předkládá návrh výroby chladící skříně. Ta je vyrobena z ocelového korozivzdorného austenitického plechu oceli třídy 17 240 o tloušťce 1,5 mm. Návrh je zpracováván na základě výkresové dokumentace. Vyráběný počet kusů je 200. Výroba proběhne technologiemi vysekávání a ohraňování, na které je zpracována i literární studie. Pro výrobu jsou zvoleny stroje Finn Power C5 s jmenovitou silou 300 kN a TruBend 5170 s jmenovitou silou 1700 kN. Nástroje jsou použity normalizované, vyrobeny z nástrojové kalené oceli a oceli 42CrMo4. V práci je též obsaženo technicko-ekonomické zhodnocení, které porovnává náklady na výrobu při různých počtech kusů.The thesis deals with presenting an assembly proposal of a cooling cabinet. The cooling cabinet is made from an austenitic steel plate of the ČSN 17 240 grade with a thickness of 1.5 millimetres. The assembly proposal is composed according to the design documentation. The number of the assembled pieces is 200. The manufacturing shall be made with...

One method is to cover sliding components with materials that have low friction and wear characteristics. Surface functionalization is a fast-growing field emerging subject, owing to the need for surface modification being less expensive than designing and manufacturing a whole new material, and allowing the retention of some characteristics of the initial material, such as mechanical properties. Coatings are used as an alternative in the machining process to extend tool life, improve product surface quality, and speed up production. Multilayer coatings are particularly appealing among coating design concepts because they provide for more flexibility in tailoring surface qualities. For tribological performance improvement, the ability to regulate residual stress, hardness to elasticity modulus ratio, and substrate adherence, for example, by stacking coating layers, is advantageous. In this context, multilayer coatings have sparked a surge of interest as a feasible option for minimizing friction and wear. This paper looked at the properties of multilayer coating systems for tribological applications. The purpose of this work is to investigate the performance of coated tools in the machining process. Multilayer coating, nano-coating materials, and cutting tool are some of the terms used in this paper.

Bachelor thesis is focused on the design and production of a headphone holder. Thesis is divided into theorethical and practical part. The theoretical part is described Rapid Prototyping technology, precision casting with use of silicone molds and precision investment casting. The practical part is focused on the design of a headphone holder in CAD system Autodesk Inventor and following production via two different methods. The first way is 3D printing by Fused Deposition Modeling method and the second way is casting wax and plastic models using a silicone rubber mold. Conclusion of this thesis contains technical-economic evaluation and comparison of both manufacturing methods

In the field of material removal, metal cutting is one of the most important manufacturing methods. The parametric optimization of the turning mechanism is the subject of this article. Cutting speed, feed rate, and cut depth are specific input parameters. MINITAB 18 uses a L9 orthogonal array to design the combination of these parameters. Turning operations are based on the Design of Experiment are used to assess tool wear and surface roughness. The Taguchi method was used to design and optimize the experiment. ANOVA was used to assess which cutting parameters have a major impact on surface roughness and tool wear. To optimize surface roughness and finish, EN 31 is used as a workpiece and SNMG120408MS is used as a carbide cutting tools wear .Cutting speed (40, 60, and 90 m/min), feed rate (0.1, 0.15, and 0.2 mm/rev), and cut depth are the turning parameters (0.5, 0.75 and 1.0 mm). Arm wear at each cutting edge of the tool is determined by toolmaker microscope and surface roughness is measured by Talysurf profilometer (Taylor Hobson Surtronic 3). Cutting speed is the most important tool parameter, according to the findings.

Bakalářská práce předkládá návrh technologie výroby držáku kabeláže ve venkovní části klimatizace. Díl je vyráběn z ocelového plechu s označením DC01 o tloušťce 1 mm. Výrobní série je stanovena na 200 000 kusů ročně. Na základě literární studie různých výrobních technologii byla jako nejvhodnější vybrána varianta výroby ve sdruženém postupovém nástroji. Ten umožní sloučení stříhání a ohýbání do jednoho nástroje. Výroba bude probíhat na mechanickém výstředníkovém lisu LEN 63 C. Ten splňuje všechny potřebné požadavky.The bachelor’s thesis proposes a design for the production technology of the cabling holder, situated in the outdoor part of the air conditioner. This product is made of steel sheet DC01 with a thickness of 1 mm. The production of this holder is set to be 200 000 pieces per year. A progressive die tool was selected as the most suitable type of production technology, based on a literature study of various production technologies. This enables to combine cutting and bending...

This work addresses the following open research question: what non-contact measurement techniques and analytical approaches are required to assess the surface finish of a workpiece in situ during conventional machining without stopping the machine tool? The goal is to track variations in surface finish during conventional machining without stopping the machine tool so that quick compensatory action can be taken in case of a process drift. In pursuit of this goal, the objective of this work is non-contact, vision-based online measurement of surface finish in a conventional machining operation, such as outside diameter (OD) turning on a lathe. To realize the foregoing objective, algebraic graph theoretic image processing is used. The approach is based on converting an image of a surface into an unweighted and undirected network graph. The graph theoretic invariant, Fiedler number (2), is estimated, and subsequently invoked as a discriminant of workpiece surface roughness. The advantage of the proposed approach is that it eschews complex image filtering and segmentation steps. The central hypothesis is that the graph-based topological quantifier Fiedler number (2) estimates surface finish in a conventional machining operation with accuracy Sa ± 2 m (arithmetic average areal surface roughness, m) when Sa is in the range of 1-10 m. This hypothesis is tested on conventional cylindrical (outside diameter) turning of shafts by using an optical imaging setup (CCD camera) incorporated into a lathe machine. Through statistical modeling it is demonstrated that the Fiedler number (2) tracks surface finish variations in situ for steel and aluminum alloy shafts (4340 and 6061 grades, respectively) in near real-time with a maximum error of approximately Sa ± 2 m. This measurement error was verified to be within 15% of the actual measured surface finish. Tests were also carried out under three different rotational speeds (0 rpm, 45 rpm, 245 rpm); and the approach was consequently attested to be robust to rotational speeds. The computational time for estimating the surface finish from this approach was assessed to be within tenth of a second, thus validating its practical applicability.

Práce předkládá návrh výroby nástrčného klíče. Nástrčný klíč se používá jako bezpečnostní klíč pro povolování bezpečnostních matic kol automobilu. Na základě požadavků na součást byla zvolena vhodná technologie výroby. Součást je vyrobena pomocí protlačování a pěchování. Výchozím polotovarem pro tváření je tyč válcovaná za tepla z oceli 1.7131 (ČSN 14 220) o průměru 26 milimetrů. Bezpečnostní klíč bude vyroben na dvouklikovém lisu GTX-300H. Výroba proběhne ve třech operacích.This thesis propses the design of production of a socket wrench. A socket wrench is used as safety wrench for loosening safety screws of the car wheels. The proper technology for production was chosen based on the component requirements. The component is made by using metal extrusion and heading. The starting blank for metal forming was chosen steel rod made of 1.7131 steel (ČSN 14 220) with a diameter of 26 milimeters. The safety wrench will be made by doublecrank press GTX-300H. Production will be done in thre...

In the paper we present a mathematical model through which are determined the balance conditions, needed for the stability analysis of the oscillating movement of the main spindle at CNC lathe. We take into account Hamilton's variation principle, the axiom of impulse derivative and the axiom of kinetic moment derivative. We present the general movement equations that generate the oscillations based on the calculus hypotheses, performing the introduction of the external solicitations. Establishment of the balance configuration is done by imposing the conditions that the system of forces that act upon the ensemble spindle – bearings - tool causes a deformation of the spindle, without producing spindle vibration. We obtain the new differential equations of the movement, in which the forces and moments are determined from the static case, based on which we can determine the integration constants in the characteristic points of the main spindle.

ABSTARCT This paper envisages the optimal setting of process parameters which influences the surface roughness during the machining operation of En 41B alloy steel with cermet tool. Experiments have been carried out by using Taguchi design. The surface roughness is considered as quality characteristic while the process parameters considered are speed, feed and depth of cut. The results of the machining experiments for En 41B were used to characterize the main factors affecting surface roughness by the Analysis of Variance (ANOVA). The feed and speed are identified as the most influential process parameters on work piece surface roughness.

The benefits of cutting fluids in machining are well known, but their use is accompanied by health and environment hazards. Moreover, strict environmental regulations make the manufacturers to switch over to dry turning, which is not feasible during machining of sticky material like stainless steel and Inconel etc. Therefore, the use of minimal quantities of lubricant (MQL) can be regarded as an alternative solution and a step towards green machining. In the present investigation an attempt has been made to explore the potential of MQL turning of stainless steel with coated carbide cutting tool. Turning under MQL conditions has shown superior results (in terms of flank wear and machined surface roughness) over wet and dry turning. Signal to noise (S/N) ratio as per Taguchi design revealed speed and MQL as significant parameters for minimizing flank wear and surface roughness, whereas feed can be set within range. The optimum combination of parameters are cutting speed (58 m/min), feed rate (0.06 mm/rev.) and MQL flow rate (100 mL/h) for flank wear and cutting speed (23 m/min), feed rate (0.07 mm/rev.) and MQL flow rate (150 mL/h) for surface roughness. Taguchi optimized conditions were validated through multiple response optimization using desirability function.

Following several years of research and development effortsKrupp Widia GmbH of Essen, Germany, recently began operation of its new plasma CVD facility for coating indexable inserts. The tandem facility permits a rapid sequence of coaling operations and fast loading and unloading of its two coating furnaces. The company

The paper presents a mathematical model for analysis of friction between the tool bearing saddle and conductor at CNC lathe. The analysis of longitudinal advance movement laws is performed taking into account the appearance and development of disturbing harmonic forces created by auto-vibrations determined by the interaction between the partial elastic systems of tool and workpiece. The friction force is emphasized as product of two components depending on the sliding speed and on the normal disturbing force. By establishing the dynamic response of the system, when the normal force depends linearly on speed, acceleration and mobile ensemble position, the premises are created for stability analysis of the friction movement, obtaining the limit speeds under which the stick-slip phenomenon occurs. Thus, it is provided for a rational design of CNC lathe elastic structure, in order to improve the surface quality and the dimensional precision.

The aim of this dissertation is the comparison of two chosen milling tools. Both milling tools are made of solide carbides and therefore the theoretical part deals with these materials. We compare the chemical composition as well as the milling tools materials. Next chapter deals with the geometry of the milling tools with semi-circular front blades cutting edges and comparison. In the last part of the dissertation we test the durability. The data gained by a micrometric method are interpreted in the graph. By means of this research we found out the impact on the suitably chosen geometry on splinters and wear resistance. It is possible to optimize the produced milling tools or to choose more suitable tool instrument on the basis of gained durability data

The general manufacturing problem can be described as the achievement of a predefined product quality with given equipment, cost and time constraints. Unfortunately, for some quality characteristics of a product such as surface roughness it is hard to ensure that these requirements will be met. This paper aims at presenting the review on various methodologies and practices that are being employed for the prediction of surface roughness. The objective of this research is to analyze the effects of machining parameters on surface roughness quality.

In the paper we present a mathematical model through which are determined the balance conditions, needed for the stability analysis of the oscillating movement of the main spindle at CNC lathe. We take into account Hamilton's variation principle, the axiom of impulse derivative and the axiom of kinetic moment derivative. We present the general movement equations that generate the oscillations based on the calculus hypotheses, performing the introduction of the external solicitations. Establishment of the balance configuration is done by imposing the conditions that the system of forces that act upon the ensemble spindle – bearings - tool causes a deformation of the spindle, without producing spindle vibration. We obtain the new differential equations of the movement, in which the forces and moments are determined from the static case, based on which we can determine the integration constants in the characteristic points of the main spindle.

The paper presents a mathematical model for determining the general movement equations that describe the vibration movement of the tool bearer spindle at superfinishing operations. There are presented the specific problems and the work schematics. The mathematical model uses the axioms of kinetic impulse and moment derivatives. At superfinishing, the spindle is eccentric and its working position is vertical. A series of simplifying assumptions are used, such as: Bernoulli’s hypothesis, the movement is without shocks, there are no remnant tensions, the strains are of elastic nature only. There are emphasized the components of the movement equations under restricted matrix form. The effect of transversal contraction and the torsion vibrations are neglected.

The paper presents a mathematical model for analysis of friction between the tool bearing saddle and conductor at CNC lathe. The analysis of longitudinal advance movement laws is performed taking into account the appearance and development of disturbing harmonic forces created by auto-vibrations determined by the interaction between the partial elastic systems of tool and workpiece. The friction force is emphasized as product of two components depending on the sliding speed and on the normal disturbing force. By establishing the dynamic response of the system, when the normal force depends linearly on speed, acceleration and mobile ensemble position, the premises are created for stability analysis of the friction movement, obtaining the limit speeds under which the stick-slip phenomenon occurs. Thus, it is provided for a rational design of CNC lathe elastic structure, in order to improve the surface quality and the dimensional precision.

Nickel-based super alloys are classified as ‘difficult to machine’ materials due to its inherent characteristics such as high hardness, and toughness, high strength at elevated temperatures, low thermal conductivity, ability to react with cutting inserts, and ability to weld onto the surface of the cutting insert. The present study investigated the parameter optimization of end milling operation for Inconel 718 super alloy with multi-response criteria based on the Taguchi method and desirability function analysis. Experimental tests were carried out based on an L9 orthogonal array of Taguchi method. The influence of machining factors cutting speed, feed rate and depth of cut were analyzed on the performances of surface roughness and material removal rate. The optimum cutting conditions are obtained by Taguchi method and desirability function. The analysis of variance (ANOVA) is also applied to investigate the effect of influential parameters. A regression model was developed for sur...

Tato práce pojednává o konstrukčním návrhu bezprovázkového automatického stavěče kuželek pro kuželkářský sport. V první části této práce byl proveden souhrn pravidel a technických norem důležitých pro konstrukci automatického stavěče kuželek. V další části byl proveden průzkum trhu a ověření patentové nezávadnosti. Poslední část práce je zaměřena na popis koncepčního návrhu konstrukce automatu na stavění kuželek. Kompletní konstrukční a technologický návrh shrnovače, horizontálního a vertikálního výtahu kuželek a jejich praktická realizace. Návrh pohonů (AC) pro pohon sestavených částí.This thesis deals with the design of an automatic non-string pinsetter machine for nine-pin bowling. Firstly, a summary of rules and technical standards important for constructing an automatic pinsetter machine was created. The next part of the thesis contains market research and verification of patent safety. The final part of this thesis is focused on the conceptual design and construction of an aut...

The paper presents a mathematical model for analysis of friction between the tool bearing saddle and conductor at CNC lathe. The analysis of longitudinal advance movement laws is performed taking into account the appearance and development of disturbing harmonic forces created by auto-vibrations determined by the interaction between the partial elastic systems of tool and workpiece. The friction force is emphasized as product of two components depending on the sliding speed and on the normal disturbing force. By establishing the dynamic response of the system, when the normal force depends linearly on speed, acceleration and mobile ensemble position, the premises are created for stability analysis of the friction movement, obtaining the limit speeds under which the stick-slip phenomenon occurs. Thus, it is provided for a rational design of CNC lathe elastic structure, in order to improve the surface quality and the dimensional precision.

The paper presents a mathematical model for determining the movement equations that generate the transversal vibration of the main spindle at CNC lathe. For this purpose, we take into account the general equations which generate the vibration of the spindle, obtained by means of Hamilton’s Variational Principle as well as the impulse derivative and kinetic moment axioms. The solutions to the movement equations are arranged under the form of a system of first order partial derivatives equations, for which we determine the integration constants. This original way of establishing these equations allows further analysis of the main spindle vibrations in transversal direction and finding ways to decrease the vibration amplitude.

Diplomová práce se zaobírá problematikou ekonomického frézování rovinných ploch s nástroji s úhlem nastavení Kr = 45° pro materiály skupiny ISO P, M. Analýzou současné nabídky nástrojů a vyměnitelných břitových destiček Dormer Pramet vůči konkurenčním společnostem. Hlavní část diplomové práce se zabývá porovnáním geometrie nově navržené vůči konkurenci a to trvanlivostním a funkčním testem zaměřeným na utváření třísky v místě řezu a drsnost obrobeného povrchu. A následným technicko ekonomickým zhodnocením.Master thesis is dealing with economic milling of planar surfaces with tools with setting angle Kr = 45° for materials of groups ISO P, M. Analysis of current variety of tools and inserts of Dormer Pramet against a competing companies. The main part deals with the comparison of durability and functional test focused on surface roughness of the newly designed geometry against the competition. The last part is focused on technical and economic evaluation.346 - Katedra obrábění, montá...

This experiment reviews the optimization of cutting parameters for surface roughness & material removal rate in the turning process to obtain the optimal setting for the process parameters and analysis of variance is used to analysis the influence of cutting parameters while machining. Orthogonal array is also been used and prepared to obtain the optimal levels and to analyse the effect of each turning parameters. The S/N ratio is been calculated to structure the ANOVA table and  study the performance characteristics in turning process. ANOVA analysis gives the contribution percentage of every process parameter. The number of experiments are to be obtained using full factorial design for optimal result.

This work is a summary description of form cutters. It explains the basic definition of cutting and the principle of milling process, with a description of stock removal and basic cutting conditions. It includes characteristics and distribution of milling tools according to their shape and construction and a more detailed description of milling cutters and the most widely used clamping devices. The end of this thesis is devoted to comparing of chosen solid and form cutters with indexable inserts from major producers, like companies ZPS- FN Inc., L.M.T . Fette Ltd., AB Seco Tools and Mitsubishi Materials Corporation

Cílem této bakalářské práce je zmapování současné situace humanoidních robotů ve světě. Dále popisuje a srovnává hlavní představitele tohoto technického odvětví. Největší důraz byl kladen na jejich historický vývoj, současné praktické využití a plány do budoucnosti.This thesis sets out to map nowadays situation of humanoid robots in the world. It describes and compares also the main leaders of this technical branch. The greatest emphasis is put on their historical evolution, current practical use and future plans.

For all machining cutting methods, surface roughness is a parameter that greatly affects the working ability and life of machine elements. Cutting force is a parameter that not only affects the quality of the machining surface but also affects the durability of cutter and the level of energy consumed during machining. Besides, material removal rate (MRR) is a parameter that reflects machining productivity. Workpiece surface machining with small surface roughness, small cutting force and large MRR is desirable of most machining methods. Milling is a popular machining method in the machine building industry. This is considered to be one of the most productive machining methods, capable of machining many different types of surfaces. With the development of the cutting tool and machine tool manufacturing industries, this method is increasingly guaranteed with high precision, sometimes used as the final finishing method. Milling using a face milling cutter is more productive than using a...

Cílem této diplomové práce je vytvořit modul pro seřizování nástrojů pro informační systém NAHOS, vyvinutý na UVSSaR FSI VUT Brno a UVI Zlín ve spolupráci s firmou TAJMAC – ZPS, a.s. ,kde je také aplikován. Teoretická část obsahuje analýzu druhu činností při seřizování nástrojů v závislosti na výrobním procesu. Jedná se o sestavování, měření a přípravu nástrojů pro výrobu. Praktická část obsahuje tvorbu databáze a formulářů pro tento modul systému NAHOS. Při řešení bylo využito jazyka SQL v databázovém systému MS Access a jazyka XML s využitím elementů systému NAHOS.The aim of this diploma thesis is to create module adjusting of tools for NAHOS information system developed on VÚSSaR FSI VUT Brno a ÚVI FT UTB ZlínTAJMAC - ZPS a.s., where system is applied. Theoretical part contains analysis of preparation activities for tools for manufacturing process – assembling, measuring and adjusting tools. Practical part contains database design and forms for NAHOS system. In this part the SQL ...