叉架工艺及加工孔夹具设计【镗φ70H7、φ78H7的中心大孔】（有CAD图纸）.pdf

XX () CAD cad 1 ABSTRACT The processing technology of this paper describes the main crotch parts, through the opening on the drawing process are analyzed, and then design a blank, formulate the process route, process dimension and tolerance analysis to determine, selection of machining equipment, and then to the design of fixture, cutting tool, measuring tool, the design focuses on selected parts of drilling fixture, drilling fixture drawing design through the CAD design software, and then the part assembly, complete the design, and the use of virtual manufacturing fixture. This paper introduces the multidimensional should fully CAD software, and the detailed design of each part and drawing process. Special fixture design, fixture for the various components of the design, such as the connecting part positioning device, clamping device, a guide element, clamp and the machine tool and other components; calculate fixture positioning errors when positioning, reasonableness and shortcomings of fixture structure, pay attention to improving and