中文摘要：

表面微织构刀具对改善刀-工摩擦接触状态、刀具磨损及抗黏附性方面具有积极作用。利用光纤激光器,在硬质合金刀具前刀面上进行了微沟槽和微圆坑织构的加工对比试验,分析了平均输出功率、脉冲频率和离焦量等不同工艺参数对微织构的形貌和质量的影响。试验结果表明：随着平均输出功率和脉冲频率的增加,微沟槽宽度和微圆坑直径分别表现出增大和减小的趋势;采用较大的脉冲频率、平均输出功率能够改善微织构的形貌和质量;当负离焦量在-1~-1.4mm范围时,在沟槽底部获得了更加均匀光滑的形貌。

英文摘要：

Cutting tools with surface micro-textures have positive effects on reducing friction, improving the wear resistance and anti-adhesion. The comparative trials are carried out in fiber laser machining of micro-grooves and micro-holes on the rake face of cemented carbide cutting tool. The effects of various processing parameters on topography and quality of micro-textures are analyzed, such as average output power, pulse repetition rate, defocusing distance. The experimental results show that the width of micro-grooves and the diameter of micro-holes have an increasing and a decreasing tendency with the increase of the average output power and the pulse repetition rate respectively. Furthermore, the morphologies of micro-textures can be improved by the larger average output power and the pulse repetition rate. It is observed that bottom morphologies of the micro-grooves is more uniform and smoother when the defocusing distance ranges from - 1 -- 1.4 mm.