Advanced Computer-Aided Fixture Design - download pdf or read online
By Yiming (Kevin) Rong, Samuel Huang
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) suggestions and covers fixture making plans, fixture layout (both modular and committed fixtures), fixture layout verifications, and the final integration with CAD/CAM. The e-book exhibits how CAFD could lead on to an important relief of product and procedure improvement time and construction fee, and the way CAFD can bring up caliber coverage via simulation and science-based technical specification and price estimation in enterprise quoting, in particular in present supplier-based production. It additionally offers case research examples. * This e-book presents a complete answer of CAFD, together with making plans, layout, and layout verification* sensible and entire theoretical research of fixturing from actual business software tasks* Introduces the combination of fixture layout and research with CAD/CAM in order that designated geometric info should be processed and complicated fixture designs should be designed and analyzed
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Extra info for Advanced Computer-Aided Fixture Design
Therefore, Y is obtained using setup method II. From Eq. 2, it can be seen that Y is influenced by one setup error component and two machine motion error components. 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.
Therefore, the part may have different points on the boundary that reach maximum deviation. However, this maximum deviation will never exceed the tolerance zone as long as the rotation deviation of the locating datum is controlled within the normalized tolerance range. In other words, the normalized tolerance is obtained based on a worst-case analysis. There is another type of parallelism tolerance in which the axis of the toleranced feature is constrained within the tolerance zone (an axis parallel to a plane or an axis parallel to another axis).
The rest of the marks are made the same way. In this way, the deviation of the position of a mark will be carried to the making of the next mark. 10b). This example clearly shows that the key to controlling tolerance stack-up is to reduce datum changes, which can be achieved through setup planning. Note that the analysis is also valid for other tolerance specifications, although not all tolerances are datum related and hence only certain types of tolerances can be controlled through setup planning.
Advanced Computer-Aided Fixture Design by Yiming (Kevin) Rong, Samuel Huang