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 ebook discusses the basics of Computer-Aided Fixture layout (CAFD) innovations and covers fixture making plans, fixture layout (both modular and devoted fixtures), fixture layout verifications, and the final integration with CAD/CAM. The publication indicates how CAFD could lead on to an important aid of product and approach improvement time and creation price, and the way CAFD can elevate caliber coverage via simulation and science-based technical specification and price estimation in company quoting, in particular in present supplier-based production. It additionally offers case research examples. * This e-book presents a complete resolution of CAFD, together with making plans, layout, and layout verification* useful and finished theoretical research of fixturing from genuine commercial program tasks* Introduces the mixing of fixture layout and research with CAD/CAM in order that specified geometric details will be processed and complicated fixture designs might be designed and analyzed
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Extra info for Advanced Computer-Aided Fixture Design
3 Closure With traditional planning methods, manufacturing companies have devised setup plans that successfully produce all sorts of complicated parts. Hence, the purpose of setup planning research is not to solve a new problem. Rather, it aims to automate all or part of the planning process in order to achieve the efficiency promised by CAD/CAM integration. To a certain extent, this objective has been achieved. There are software tools (including commercial tools such as Cimskil by Technology Answers) that can automatically generate setup plans.
26 shows the parameter-driven relationship between the hole feature and the cutter and tool path used to machine this feature. The cutter template and toolpath template are set up based on industry best practice. 25. Examples of machine motion. CH4 CH3 D1 H1 CH2 CH1=H1+delta_H1 CH2=H-H1*2+delta_H2 CH3=H1+delta_H1 CH4=CH4 H CH1 D approaching_value = 3 L12 = H+6 m m; Drilling L23 = CH1+CH2+CH3-H; Cham fer & spot face L34 = CH1; Cutter offset R44 = (D-CD1)/2; Back chamfer --- Tool path param eters are driven by both feature and cutter parameters.
The smaller normalized tolerance, the tighter underlying tolerance. In the following subsections, generalized mathematical formulae for normalizing orientation 32 CHAPTER 2 Computerized Manufacturing Setup Planning tolerances (parallelism, perpendicularity, and angularity), location tolerances (position, concentricity, and symmetry), runout tolerances (circular and total), and non-limit-of-size dimensional tolerances (relative dimensional tolerances) are provided. No generalized formulae are presented in normalizing profile tolerances (when specified with datums) because the underlying profile can take a very complicated shape.