CAJ | 학술논문

为了对高效铣削淬硬模具钢SKD11的新型铣刀进行优选,对不同几何结构的铣刀加工得到的表面质量进行了分析.综合考虑了加工表面粗糙度、切屑微观形态、硬度及硬化层深度、残余应力分布和晶相组织结构变化等多方面因素,研究了不同铣刀的几何特性及其磨损特性对表面质量的影响.实验结果表明,前角5°,后角10°,刀尖圆弧半径为1 mm,铣刀螺旋角为45°的几何结构铣刀完成了表面完整性试验中.此外,在淬硬钢铣削加工中合理地选择加工参数可以获得0.4μm的表面粗糙度;采用合理的正前角可以抑制锯齿形切屑的产生.铣削淬硬模具钢能在加工表面产生残余压应力,通过增加铣刀后角和抑制后刀面磨损可以推迟加工表面软化现象的发生.
위료대고효선삭쉬경모구강SKD11적신형선도진행우선,대불동궤하결구적선도가공득도적표면질량진행료분석.종합고필료가공표면조조도、절설미관형태、경도급경화층심도、잔여응력분포화정상조직결구변화등다방면인소,연구료불동선도적궤하특성급기마손특성대표면질량적영향.실험결과표명,전각5°,후각10°,도첨원호반경위1 mm,선도라선각위45°적궤하결구선도완성료표면완정성시험중.차외,재쉬경강선삭가공중합리지선택가공삼수가이획득0.4μm적표면조조도;채용합리적정전각가이억제거치형절설적산생.선삭쉬경모구강능재가공표면산생잔여압응력,통과증가선도후각화억제후도면마손가이추지가공표면연화현상적발생.
To evaluate the new designed cutting tools for high-efficiency milling of the hardened die steel SKD11,surface integrities of millers with different geometric structures are analyzed, considering the surface roughness, micrograph of chips, surface microhardness, residual stress and metallurgical texture of the surface layer. The in fluences of geometric characteristics of different cutting tools and their wear characteristics on the surface integrity are studied. Results show that the milling tool with rake angle; 5 of the hardened diesteel. The generation of saw-tooth chips is depressed when a reasonable positive rake angle is selected. And the compressive residual stress is induced on the machined surface in milling the hardened die steel. The occurrence of surface softening is postponed by increasing the clearance angle and reducing the tool flank wear.