慢走丝线切割SKD11试验研究及其参数优化

Experimental research and parameter optimization for LS-WEDM SKD11

选取冲模应用较为广泛的SKD11为试验材料,在慢走丝线切割机床上以脉冲宽度、脉冲间隔、伺服电压、伺服速度、走丝速度为试验变量,设计了5因素4水平的正交试验,用于探究实际生产用的切割速度、表面粗糙度、加工精度工艺指标的影响规律,采用灰色关联度法对多工艺指标进行参数优化组合。试验结果表明:脉冲宽度是影响切割速度、表面粗糙度、加工精度的主要因素,经过优化后的参数组合,可以在保证较高切割速度86.90 mm^(2)/min、较低表面粗糙度值Ra2.612μm的同时,实现加工精度5μm以内的SKD11慢走丝线切割。

Based on the test variables of pulse width,pulse interval,servo voltage,servo speed,and wire speed,the orthogonal test with five factors and four levels was designed to machining SKD11 which was widely used in stamping dies by LS-WEDM.The influence law of cutting speed,surface roughness,and machining precision was explored and the grey correlation analysis was used to optimize the parameter combination of multi-objective.The test results showed that the main factor affecting the cutting speed,surface roughness,and machining precision is pulse width.After the parameter combination optimization,machining SKD11 by LS-WEDM with machining accuracy within 5μm can be achieved while ensuring high cutting speed 86.90 mm^(2)/min and low surface roughness Ra2.612μm.