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航空产品中各类外罩、壳体、帽罩等工件较多,通常采用引伸与冷挤压加工。由于在引伸与冷挤压过程中,金属的流动变形,工件口部周围是高低不平的,为了满足产品的要求,需增加切边工序。一般切边工序目前有两种方法;(1)机械加工;(2)模具切边。在机械加工中,有的采用车或铣,易使工件变形,尺寸不易保持一致,切割后的工件毛刺也较大,需钳工锉修。也有采用专用机床,专用刀具进行
Aerospace products in all types of enclosures, shells, caps and other parts of more, usually using the extension and cold extrusion processing. Due to the extrusion and cold extrusion process, metal flow deformation, the workpiece around the mouth is rugged, in order to meet the requirements of the product, the need to increase the trimming process. There are currently two general trimming processes; (1) Machining; (2) Die trimming. In machining, some use cars or milling, easy to make the workpiece deformation, the size is not easy to maintain the same, after cutting the workpiece burr larger, fitter file repair. There are also special machine tools, special tools