S. Petro

Toward an Automatic Measurement of Micro Cutting Tool

On Performance Verification of 3D Micro Measuring Devices

INTRODUCTION Quality is a key factor in any manufacturing system. High quality products can be so... more INTRODUCTION Quality is a key factor in any manufacturing system. High quality products can be sold with higher profit margins. Often quality is linked to immaterial properties of the product, but where possible a quantification of quality should be looked for. To quantify quality, measurement of some key characteristics of the product is required. These key characteristics directly affect the product performance. Verifying if these key characteristic are as constant as possible in any manufactured part, and conforming to project tolerances, is the aim of any quality system.

Manufacturing Signature: An Aeronautical Case Study

ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 4, 2010

Generally manufacturing processes are subjected to unpredictable variations, affecting process co... more Generally manufacturing processes are subjected to unpredictable variations, affecting process conditions, that yields manufactured parts characterized by geometric errors. This is due to the variability of the manufacturing conditions and to the behavior of the tools used in the manufacturing process (wear, thermal expansion or elastic deformation). Therefore, even if two part produced by the same manufacturing process have different local deviation, these are similar; this subject in literature is addressed as “Manufacturing Signature” (MS). In this work an approach to evaluate the form error of a free-form surface with profile tolerances by modeling the manufacturing signature is proposed. An industrial case study is discussed: an aeronautical component with free-form surfaces. Based on discrete data acquired by a Coordinate Measuring Machine (CMM), the manufacturing signature model is created, discussed and used to analyze the Manufacturing process.

Manufacturing signature of turned circular profiles

Four-axis micro measuring systems performance verification

CIRP Annals - Manufacturing Technology, 2014

This article describes the performance verification of 3D optical measuring instruments integrati... more This article describes the performance verification of 3D optical measuring instruments integrating a rotational axis using an artifact. The goal is the performance verification of four-axis measuring systems for the full 3D acquisition of micro-geometric parts. This type of measurement has many potential applications, such as in micro-tool, micro-mold, or micro-device manufacturing. The artifact is as simple as possible to reduce manufacturing costs, ensure easy calibration, comply with the ISO 10360 standard and consider all volumetric error contributions. The artifact may be useful to both measuring system manufacturers and users to provide a measurement traceability path.

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Robustness of geometric verification by segmentation-free X-ray computed tomography

Procedia CIRP

3D Identification of Face and Flank in Micro-mills for Automatic Measurement of Rake Angle

Nanomanufacturing and Metrology

Evolution of porosity and geometrical quality through the ceramic extrusion additive manufacturing process stages

Additive Manufacturing

A variational model for 3D tolerance analysis with manufacturing signature and operating conditions

Assembly Automation

Purpose The purpose of this work is to present a variational model able to deal with form toleran... more Purpose The purpose of this work is to present a variational model able to deal with form tolerances and assembly conditions. The variational model is one of the methods proposed in literature for tolerance analysis, but it cannot deal with form tolerances and assembly conditions that may influence the functional requirements of mechanical assemblies. Design/methodology/approach This work shows how to manage the actual surfaces generated by the manufacturing process and the operating conditions inside the variational model that has been modified to integrate the manufacturing signature left on the surfaces of the parts and the operating conditions that arise during an actual assembly, such as gravity and friction. Moreover, a geometrical model was developed to numerically simulate what happens in a real assembly process and to give a reference value. Findings The new variational model was applied to a three-dimensional case study. The obtained results were compared to those of the g...

Managing uncertainty in the new manufacturing era

Procedia CIRP

In today's business environment, the trend towards more product variety and customization is unbr... more In today's business environment, the trend towards more product variety and customization is unbroken. Due to this development, the need of agile and reconfigurable production systems emerged to cope with various products and product families. To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed. Indeed, most of the known methods aim to analyze a product or one product family on the physical level. Different product families, however, may differ largely in terms of the number and nature of components. This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system. A new methodology is proposed to analyze existing products in view of their functional and physical architecture. The aim is to cluster these products in new assembly oriented product families for the optimization of existing assembly lines and the creation of future reconfigurable assembly systems. Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. Moreover, a hybrid functional and physical architecture graph (HyFPAG) is the output which depicts the similarity between product families by providing design support to both, production system planners and product designers. An illustrative example of a nail-clipper is used to explain the proposed methodology. An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach.

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A Discussion on Performance Verification of 3D X-Ray Computed Tomography Systems

Procedia CIRP

In today's business environment, the trend towards more product variety and customization is unbr... more In today's business environment, the trend towards more product variety and customization is unbroken. Due to this development, the need of agile and reconfigurable production systems emerged to cope with various products and product families. To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed. Indeed, most of the known methods aim to analyze a product or one product family on the physical level. Different product families, however, may differ largely in terms of the number and nature of components. This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system. A new methodology is proposed to analyze existing products in view of their functional and physical architecture. The aim is to cluster these products in new assembly oriented product families for the optimization of existing assembly lines and the creation of future reconfigurable assembly systems. Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. Moreover, a hybrid functional and physical architecture graph (HyFPAG) is the output which depicts the similarity between product families by providing design support to both, production system planners and product designers. An illustrative example of a nail-clipper is used to explain the proposed methodology. An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach.

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Design for X-Ray Computed Tomography

Procedia CIRP

In today's business environment, the trend towards more product variety and customization is unbr... more In today's business environment, the trend towards more product variety and customization is unbroken. Due to this development, the need of agile and reconfigurable production systems emerged to cope with various products and product families. To design and optimize production systems as well as to choose the optimal product matches, product analysis methods are needed. Indeed, most of the known methods aim to analyze a product or one product family on the physical level. Different product families, however, may differ largely in terms of the number and nature of components. This fact impedes an efficient comparison and choice of appropriate product family combinations for the production system. A new methodology is proposed to analyze existing products in view of their functional and physical architecture. The aim is to cluster these products in new assembly oriented product families for the optimization of existing assembly lines and the creation of future reconfigurable assembly systems. Based on Datum Flow Chain, the physical structure of the products is analyzed. Functional subassemblies are identified, and a functional analysis is performed. Moreover, a hybrid functional and physical architecture graph (HyFPAG) is the output which depicts the similarity between product families by providing design support to both, production system planners and product designers. An illustrative example of a nail-clipper is used to explain the proposed methodology. An industrial case study on two product families of steering columns of thyssenkrupp Presta France is then carried out to give a first industrial evaluation of the proposed approach.

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A simulation method to estimate task-specific uncertainty in 3D microscopy

Measurement

A double shift self-calibration method for micro XYstages

Precision Engineering

Characterization of in-situ measurements based on layerwise imaging in laser powder bed fusion

Additive Manufacturing

Geometrical product specification and verification in additive manufacturing

CIRP Annals

Impact of the Threshold on the Performance Verification of Computerized Tomography Scanners

Procedia CIRP, 2016

Computerized tomography is an emerging technology for geometric inspection. Its capability of eas... more Computerized tomography is an emerging technology for geometric inspection. Its capability of easily scanning internal and undercut surfaces, as well as micro components, makes it the only possible choice for several measurement tasks. However, traceability is still a relevant issue, due to the lack of well-established procedures for testing CT scanners: several international standards about the application of computerized tomography for geometric inspection are still under development. In this work, we will propose the results we obtained in the application of the VDI/VDE 2617 part 13 standard on two computerized tomography scanners. In particular, we will show the impact of the choice of the threshold on the results of the test.

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3D Tolerance Analysis with Manufacturing Signature and Operating Conditions

Procedia CIRP, 2016

The present work shows a method to integrate the manufacturing signature and the operating condit... more The present work shows a method to integrate the manufacturing signature and the operating conditions into a model for 3D tolerance analysis of rigid parts. The paper presents an easy way to manage the actual surfaces due to a manufacturing process and the operating conditions, such as gravity and friction, inside the variational model for a 3D tolerance analysis. The used 3D case study is deliberately simple in order to develop a conceptual demonstration. The obtained results have been compared with those due to a geometrical model that reproduces what happens during assembly. It has been considered as reference case.

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Comparison of chaos optimization functions for performance improvement of fitting of non-linear geometries

Measurement, 2016

Measuring Strategy Definition for Flatness: a case study

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