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激光微织构拉刀制备与能量残留
Preparation of laser micro-textured broach and residual energy
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摘要: 基于将表面织构技术应用于刀具表面可以有效改善刀具切削性能，结合拉刀材料性能，提出一种微织构拉刀的加工方法。利用激光加工技术在拉刀后刀面加工出一种微织构，并研究各种加工参数对织构形貌的影响。深入研究 Q 频、功率、扫描速度及加工次数对织构及其润湿性的影响。实验结果表明：低 Q 频下织构边界模糊，高 Q 频下边界清晰；随功率上升，织构边界膨胀严重，重铸区不断增大；加工次数与微织构深度近似成正比关系；随扫描速度增大，材料的去除率下降，材料残留明显；制备完成初期织构表面存在能量残留，使得疏水织构出现亲水特性。Abstract: Based on the fact that surface textured cutting tool can effectively improve the cutting performance,taking broach material into consideration a processing method of micro-textured broach was put forward.Laser processing technology was used to generate a micro-texture on the flank of broach,and the influence of various processing parameters was researched.The influ-ence of Q frequency,power,scanning speed and processing times on the texture formation and wetting was investigated.The ex-perimental results show that with the increase of the Q frequency,the texture boundaries are more clear,recast area will be larger with the increase of power,the depth of micro texture is proportional to the processing times,and the scanning speed has to be lower than a certain speed to remove material adequately.In the initial stage of the preparation,the energy remains on the surface of the texture will make the hydrophobic texture appear hydrophilic.
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