【摘要】 通过单因素实验研究了切削用量对铍材切削表面粗糙度的影响，并结合切屑形貌分析铍材切削变形的方式。结果表明：铍材切削表面存在沟槽、微裂纹、凹坑、侧向流动、积屑瘤等多种缺陷；表面粗糙度主要由进给量决定，随进给量的增大不断增大；切削过程中剪切滑移量较大，局部剪切加工硬化达到材料的极限强度后，切屑以脆性断裂方式脱离表面；切削表面受切削热影响和刀具的挤压发生微塑性变形。更多还原

【Abstract】 The effects of cutting parameters on the roughness of beryllium surface are studied by single factor experiment, and the cutting deformation mode of beryllium is analyzed combined with chip morphology.The results show that there are defects on the cutting surface of beryllium, such as grooves, microcracks, pits, lateral flow, chip accretion.The cutting surface roughness is mainly determined by the feed, which increases with the increase of feed.In the process of cutting, the amount of shear slip is large.After the local shear hardening reaches the ultimate strength of the material, the chip breaks away from the surface in the form of brittle shear fracture.A small amount of micro plastic deformation occurs on the cutting surface due to cutting heat and tool extrusion.更多还原