激光预热温度对铣削GH4169切削力及表面粗糙度的影响

Influence of Laser Preheating Temperature on Cutting Force and Surface Roughness of GH4169 Milling

采用单因素法,通过ABAQUS仿真与试验研究了激光预热温度与切削参数对铣削GH4169高温合金的铣削力和表面粗糙度的影响规律,进一步分析了激光加热产生的热影响区深度与切削参数对切削力及表面粗糙度的影响。结果表明:本研究仿真模型与试验结果高度吻合,最大误差值16.5%,具有一定的准确性与指导意义。激光加热辅助可明显地降低切削力,比常规铣削方式降低15%~30%。低进给量配合相对较小的切削深度能明显改善切削力,激光加热辅助铣削加工表面粗糙度皆低于常规铣削加工表面,且粗糙度值下降率与切削力下降率变化较吻合,说明表面粗糙度与切削力之间密切相关。当预热温度增加到一定程度时,激光加热对加工表面的改善作用减弱。研究发现,预热温度800℃,切削速度60m/min,进给量0.03mm/z和切削深度0.3mm时,切削力与表面粗糙度值最佳。

The influence of laser preheating temperature and cutting parameters on the milling force of GH4169 high-temperature alloy is investigated through single-factor experiments and ABAQUS simulations.The relationship between the depth of the thermal affects zone generated by laser heating and cutting parameters,and its impact on cutting force and surface roughness are further analyzed.The results shows a high correlation between the simulation model and experimental results,with a maximum error of 16.5%,and is provided with reasonable accuracy and guiding significance.Laser-assisted milling demonstrates a significant reduction in cutting force compared to conventional milling,with a decrease of 15%~30%.Lower feed rates,combined with relatively smaller cutting depths,effectively improves cutting forces.The surface roughness of the workpiece processed by laser-assisted milling is lower than that of conventional milling.The decrease in roughness is consistent with the decrease in cutting force,indicating a close correlation between surface roughness and cutting force.However,when the preheating temperature increases to a certain degree,the improvement of the processed surface by laser heating begins to weaken.The optimal cutting force and surface roughness are achieved at a preheating temperature of 800℃,cutting speed of 60m/min,feed rate of 0.03mm/z,and cutting depth of 0.3mm.