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

Graphics Multimedia

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 ebook discusses the basics of Computer-Aided Fixture layout (CAFD) options and covers fixture making plans, fixture layout (both modular and devoted fixtures), fixture layout verifications, and the final integration with CAD/CAM. The ebook indicates how CAFD could lead on to an important aid of product and technique improvement time and construction fee, and the way CAFD can raise caliber insurance via simulation and science-based technical specification and value estimation in company quoting, particularly in present supplier-based production. It additionally presents case examine examples. * This booklet offers a complete answer of CAFD, together with making plans, layout, and layout verification* functional and complete theoretical research of fixturing from genuine business program initiatives* Introduces the combination of fixture layout and research with CAD/CAM in order that unique geometric details could be processed and complicated fixture designs should be designed and analyzed

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Sample text

To investigate the manufacturing errors involved in the dimensions obtained using different setup methods, the following assumptions are made: • • • • The part to be machined is located and clamped on the machine table using a fixture. The fixture is perfectly setup on the machine table; that is, Type III errors are negligible. The cutting tool is perfectly accurate and the effect of tool wear is trivial; that is, Type V errors are negligible. The effect of workpiece deformation due to clamping force, cutting force, gravity, and internal stress is trivial; that is, Type VI errors are negligible.

2) Z is the length between machined surfaces B’ and C’. Surface C’ is machined using surface A as a setup datum in the first setup; surface B’ is machined using surface D’ as a setup datum in the second setup. Therefore, Z is obtained using setup method III. From Eq. 3, it can be seen that Z is influenced by one setup error component and four machine error components under the assumption. 3) 30 CHAPTER 2 Computerized Manufacturing Setup Planning From this analysis it can be seen that when using setup method I, the setup error is not included in the dimensions obtained.

Object-oriented representation of the extended directed graph. To overcome the shortcomings of the conventional directed graph and make it amenable to model tolerance information, an extended directed graph is proposed. 3 SYSTEM DEVELOPMENT 53 EE = {e1, e2, …, em} ej = {vk, vl , lj} j ∈ m; k, l ∈ n, where V is the set of vertices, E is the set of edges, and lj is a lable describing edge ej. 29. 30. 30. Main operations in the object-oriented extended directed graph. An example best illustrates how to model feature tolerance relationships using an extended directed graph.

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