The Experts below are selected from a list of 87 Experts worldwide ranked by ideXlab platform
Wei-fang Chen - One of the best experts on this subject based on the ideXlab platform.
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Analysis and Study of the Rotation Axis Method
2014Co-Authors: Wei-fang ChenAbstract:Roundness is the basic parameter to estimate the workpiece form error. Spindle is a commonly used structure to provide the revolving motion in machines and instruments. As no spindle rotation is perfect, the resulting error motion is a quantity to evaluate its precision. Roundness and spindle error motion are dependent and affect each other; therefore, they are both sides of a problem in precision engineering. Roundness and spindle error motion measurements are two fundamental issues in geometrical measuring technique. They play an important role in precision engineering which is a emerging science based on precise testing technique, precision machining technique, microelectronic technique and photo electronic technique. Taking the Axis of the minimum circumscribed cylinder of the measured points on the cylinder shank as the Datum Axis, this paper provides models of the minimum circumscribed revolving surface. The minimum circumscribed revolving surface should be defined on the basis of this Datum Axis.
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Models for evaluating the contour quality of revolving cutter with involute generator
The International Journal of Advanced Manufacturing Technology, 2005Co-Authors: Wei-fang Chen, Jia-huei HwangAbstract:The toroid-shaped helical cutter with an involute generator is a precision tool used in the machining of involute helical gears. Taking the Axis of the minimum circumscribed cylinder of the measured points on the cylinder shank as the Datum Axis, this paper provides models of the minimum circumscribed involute revolving surface and the minimum circumscribed toroid-shaped revolving surface. This paper also presents models for evaluating the contour quality of a toroid-shaped cutter with an involute generator. The validity and accuracy of these models are confirmed by worked examples.
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Quality assurance for concave-arc ball-end milling cutters
Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture, 2003Co-Authors: Wei-fang Chen, Hsin Yi Lai, Cha'o-kuang ChenAbstract:AbstractThis paper presents a systematic modelling procedure for assessing the profile quality of concave-arc ball-end (CABE) milling cutters with a cylindrical shank. CABE milling cutters are widely used in three-Axis numerical control (NC) machines for producing dies and moulds of complicated surface features. Evaluation of the contour quality of the CABE milling cutter is crucial in enhancing machining accuracy and efficiency. In order adequately to describe the shape of the clamped cutter, the centre-line Axis of the minimum circumscribed cylinder of the cylinder shank is taken as the referenced Datum Axis. The minimum circumscribed concave-arc revolving surface and the minimum circumscribed spherical surface are carefully derived in sequence. The profile errors and tolerances are estimated. The quality of the CABE milling cutter is assured by using the proposed modelling procedure, and several numerical examples are presented to illustrate its effectiveness. The results indicate that the present meth...
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Models for contour quality evaluation of a toroidal cutter with a concave-arc generator
Journal of Materials Processing Technology, 2002Co-Authors: Wei-fang Chen, Wei-ya ChenAbstract:Abstract This paper presents models for evaluating the contour quality of a toroidal cutter with a concave-arc generator and a cylindrical shank. Taking the Axis of the minimum circumscribed cylinder of measured data on the cutter shank as the Datum Axis, models are developed to investigate the minimum circumscribed concave-arc revolving surface and the minimum circumscribed toroidal revolving surface. Illustrative examples are given to verify the validity of these models. This paper provides a reference for evaluating the contour quality of this type of revolving cutter.
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Evaluation of contour quality in sampling inspection of two drill types
International Journal of Advanced Manufacturing Technology, 2002Co-Authors: Wei-fang Chen, W.-y. Chen, Y.-y. TangAbstract:This paper introduces the differences in quality evaluation for the sampling inspection of drills with taper or cylindrical shanks. For a drill with a taper shank, the Datum Axis is taken to be the Axis of the minimum circumscribed cone, whereas for a drill with a cylindrical shank, the Datum Axis is taken to be the Axis of the minimum circumscribed cylinder. The features that are common to both drill types are the definition of the minimum circumscribed cylinder of the cylinder part with helical grooves and the minimum circumscribed univalent hyperboloid based upon the Datum axes given above. This paper presents all the necessary supporting models, illustrated and verified by examples, for the evaluation of actual contour quality for these two drill types which are comprised of compound surfaces.
Shen-wang Lin - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of the profile of the taper ball-end milling cutter with a cylindrical shank
Journal of Materials Processing Technology, 2007Co-Authors: Pai-chi Chang, Shen-wang LinAbstract:Abstract This paper presents a model for evaluating the quality of the actual working profile of a taper ball-end milling cutter with a cylindrical shank. The cutter is attached to the cylindrical surface of the shank, and is then mounted on a machine tool. The analysis presented within this paper takes the Axis of the minimum circumscribed cylindrical surface (MCCS) of the shank as the Datum Axis. This paper provides revised equations for defining the minimum circumscribed taper surface (MCTS) and the minimum circumscribed sphere (MCS), which may be used to calculate the profile of the spiral groove on the taper part and the ball-end part of the cutter, respectively. This paper serves as a basis for evaluation of the profile of the taper ball-end milling cutter with a cylindrical shank.
Pai-chi Chang - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of the profile of the taper ball-end milling cutter with a cylindrical shank
Journal of Materials Processing Technology, 2007Co-Authors: Pai-chi Chang, Shen-wang LinAbstract:Abstract This paper presents a model for evaluating the quality of the actual working profile of a taper ball-end milling cutter with a cylindrical shank. The cutter is attached to the cylindrical surface of the shank, and is then mounted on a machine tool. The analysis presented within this paper takes the Axis of the minimum circumscribed cylindrical surface (MCCS) of the shank as the Datum Axis. This paper provides revised equations for defining the minimum circumscribed taper surface (MCTS) and the minimum circumscribed sphere (MCS), which may be used to calculate the profile of the spiral groove on the taper part and the ball-end part of the cutter, respectively. This paper serves as a basis for evaluation of the profile of the taper ball-end milling cutter with a cylindrical shank.
Wei-ya Chen - One of the best experts on this subject based on the ideXlab platform.
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Models for contour quality evaluation of a toroidal cutter with a concave-arc generator
Journal of Materials Processing Technology, 2002Co-Authors: Wei-fang Chen, Wei-ya ChenAbstract:Abstract This paper presents models for evaluating the contour quality of a toroidal cutter with a concave-arc generator and a cylindrical shank. Taking the Axis of the minimum circumscribed cylinder of measured data on the cutter shank as the Datum Axis, models are developed to investigate the minimum circumscribed concave-arc revolving surface and the minimum circumscribed toroidal revolving surface. Illustrative examples are given to verify the validity of these models. This paper provides a reference for evaluating the contour quality of this type of revolving cutter.
Cha'o-kuang Chen - One of the best experts on this subject based on the ideXlab platform.
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Quality assurance for concave-arc ball-end milling cutters
Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture, 2003Co-Authors: Wei-fang Chen, Hsin Yi Lai, Cha'o-kuang ChenAbstract:AbstractThis paper presents a systematic modelling procedure for assessing the profile quality of concave-arc ball-end (CABE) milling cutters with a cylindrical shank. CABE milling cutters are widely used in three-Axis numerical control (NC) machines for producing dies and moulds of complicated surface features. Evaluation of the contour quality of the CABE milling cutter is crucial in enhancing machining accuracy and efficiency. In order adequately to describe the shape of the clamped cutter, the centre-line Axis of the minimum circumscribed cylinder of the cylinder shank is taken as the referenced Datum Axis. The minimum circumscribed concave-arc revolving surface and the minimum circumscribed spherical surface are carefully derived in sequence. The profile errors and tolerances are estimated. The quality of the CABE milling cutter is assured by using the proposed modelling procedure, and several numerical examples are presented to illustrate its effectiveness. The results indicate that the present meth...
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Study on the Form Error Evaluation Model of a Conical-Shank Ball-End Milling Cutter
International Journal of Advanced Manufacturing Technology, 2001Co-Authors: Cha'o-kuang ChenAbstract:This paper presents a complete form error evaluation model of a conical-shank ball-end cutter. The complete conical-shank ball-end cutter comprises three major revolving portions including the conical shank, cylindrical section, and spherical head. By using the central line of the minimum circumscribed conical shank as a Datum Axis and employing profile data measured directly from cutter surfaces, the proposed evaluation method systematically computes the exact revolving envelopes of the conical shank, cylindrical part, and spherical part separately, and then combines them. One application example is presented to illustrate the effectiveness of the proposed modelling method. This paper provides a simple, logical, and precise method for the quality evaluation of a special rotating cutter and can be further extended for use in the quality assessment of various complicated cutters.
