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

By Yiming (Kevin) Rong, Samuel Huang

Fixtures--the part or meeting that holds a component 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) options and covers fixture making plans, fixture layout (both modular and devoted fixtures), fixture layout verifications, and the general integration with CAD/CAM. The ebook indicates how CAFD could lead to an important aid of product and procedure improvement time and construction rate, and the way CAFD can bring up caliber coverage via simulation and science-based technical specification and price estimation in enterprise quoting, specifically 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* functional and accomplished theoretical research of fixturing from actual commercial software tasks* Introduces the combination of fixture layout and research with CAD/CAM in order that targeted geometric info should be processed and complicated fixture designs will be designed and analyzed

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Instead, the use of constrained optimization methods is needed, as discussed in material to follow. 1 Orientation Tolerances Parallelism. In defining a parallelism tolerance, the two features involved could be two planes, one plane and one axis, or two axes. For a parallelism tolerance defined by the zone between two parallel planes, suppose the equation for the ideal position of the toleranced feature is ⎧z = h S0 : ⎨ ⎩ x , y ∈ {( x , y ) | G ( x , y ) = 0}, where h is the distance between the toleranced feature and the reference feature (datum) and G(x, y) = 0 is the equation for the contour of the toleranced feature and is either continuous (described by a single function, such as an ellipse or a circle) or segmental continuous (described by a set of functions, such as a polygon).

2 TOLERANCE ANALYSIS IN SETUP PLANNING 25 and dimensional inaccuracy of the machine tool and its rigidity, stiffness, and thermal deformation. Type V errors are related to the cutting tool itself. These errors are caused by geometrical and dimensional inaccuracy of the cutting tool and by tool wear. Type VI errors are related to the workpiece itself. These errors are mainly caused by deformation of the workpiece due to internal stresses after machining. 10. Making a ruler (a) using a fixed 6-inch reference ruler and (b) using a 1-inch reference ruler.

9. Machining errors involved in a machining process. 9 one can see that there are seven types of manufacturing errors. Type I errors are errors that occur when locating and clamping the workpiece on the fixture. These errors include workpiecelocating error, workpiece-clamping distortion, and opera-tional error. Type II errors are related to the fixture itself. The major por-tion of errors in this case are caused by geometrical and dimensional inaccuracy of the fixture. Other errors are caused by the deformation of the fixture when clamping force is applied.

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