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我们在加工某一零件时,其中心孔为A12,表面粗糙度要求低,采用普通的中心孔锪钻,经过钻孔、粗锪、精锪等工序,加工出的零件中心孔60°锥面上有划伤、撕扯、多棱等现象,达不到工艺要求,影响后续工序的加工,工作曾一度受阻。经认真观察分析,认为造成上述现象的主要因素是刀具前角小,切削用量不合适,易形成切削瘤所致。由于受设备、零件等的限制,
When machining a certain part, the center hole is A12, the surface roughness is low, and the center hole is drilled through the common center hole. Through the processes of drilling, roughing and finishing, the center hole of the machined part is 60 ° cone There are scratches, tearing, polygons and other phenomena on the surface, failing to meet the technological requirements and affecting the subsequent processing operations, once blocked. After careful observation and analysis, that the main factors causing the above phenomenon is a small tool rake, cutting the amount of inappropriate, easy to form a cutting tumor. Due to the equipment, parts and other restrictions,