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１引言图１所示零件为我公司某种型号冰箱用的圆弧形门外壳零件图。该零件材料为表面覆塑彩色钢板，材料厚度为０．６mm。其冲压工艺过程包括冲切R头及两道折弯工序。由于它与门体堵盖（塑料件）共同构成冰箱的门体，属于冰箱的外观件，所以要求与堵盖的接合面吻合精度极高。冲
1 Introduction Figure 1 shows the parts shown in my company a refrigerator with a circular arc door parts map. The material for the surface of plastic coated color plate, the material thickness of 0.6mm. The stamping process includes punching R head and two bending processes. Because it and the door block cover (plastic parts) together constitute the door of the refrigerator, refrigerator parts are appearance, so the requirements of the junction cover with high precision cover. Rush