Read e-book online Advanced Computer-Aided Fixture Design PDF

By Yiming (Kevin) Rong, Samuel Huang

ISBN-10: 0125947518

ISBN-13: 9780125947510

Fixtures--the part or meeting that holds an element present process machining--must be designed to slot the form of that half and the kind of machining being performed. This e-book discusses the basics of Computer-Aided Fixture layout (CAFD) ideas and covers fixture making plans, fixture layout (both modular and committed fixtures), fixture layout verifications, and the final integration with CAD/CAM. The publication indicates how CAFD could lead to an important relief of product and strategy improvement time and construction fee, and the way CAFD can raise caliber coverage via simulation and science-based technical specification and value estimation in company quoting, specially in present supplier-based production. It additionally presents case research examples. * This booklet offers a complete resolution of CAFD, together with making plans, layout, and layout verification* sensible and entire theoretical research of fixturing from genuine commercial software initiatives* Introduces the combination of fixture layout and research with CAD/CAM in order that designated geometric info could be processed and complicated fixture designs might be designed and analyzed

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Extra resources for Advanced Computer-Aided Fixture Design

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Due to the rotation error in locating, points on the toleranced feature surface will deviate from their ideal positions. 12. Deviation of machined feature due to locating errors. 12 shows an example part the top surface of which has a parallelism tolerance δ with respect to the bottom surface. Assume the part is in its ideal form but located imperfectly. As a result, the toleranced feature deviates from S0 to a new plane S described by the equation Ax + By + Cz + D = 0. Due to the presence of rotation error, points on plane S will have different z coordinate values.

To assure the parallelism tolerance, the following equation should hold. z max − z min ≤ δ Constraint given by Eq. 5 gives a feasible region in which zmax and zmin can be found. Because the objective functions in Eq. 5 are linear, it is easy to show that zmax and zmin can be found only on the boundary of r G(x, y). Let p denote the vector established by a point whose z coordinate equals to zmin and a point whose z coordinate equals zmax. The value of z max − z min can be calculated as r z max − z min = p × sin θ , r where θ is the angle between the vector p and the plane S0.

Main surfaces are those that determine the feature type, main parameters, position, and orientation. Auxiliary surfaces are those attached to main surfaces. The feature information can be further linked to a tool-path representation. 22 shows the definition of the hole feature of the simplified automotive part and its corresponding manufacturing processes. 21. Information model for a combined manufacturing feature. 22. A combined hole feature and its manufacturing processes. A combined feature may be produced by different manufacturing processes, depending on available resources.

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Advanced Computer-Aided Fixture Design by Yiming (Kevin) Rong, Samuel Huang

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