慢走絲線切割SKD11試驗研究及其參數優化
李文明1，唐東升2（1.天津理工大學中環信息學院機械工程系，天津300380；2.天津金海天精密模具股份有限公司，天津300380）
摘要：選取沖模應用較為廣泛的SKD11為試驗材料，在慢走絲線切割機床上以脈沖寬度、脈沖間隔、伺服電壓、伺服速度、走絲速度為試驗變量，設計了5因素4水平的正交試驗，用于探究實際生產用的切割速度、表面粗糙度、加工精度工藝指標的影響規律，采用灰色關聯度法對多工藝指標進行參數優化組合。試驗結果表明：脈沖寬度是影響切割速度、表面粗糙度、加工精度的主要因素，經過優化后的參數組合，可以在保證較高切割速度86.90mm2/min、較低表面粗糙度值Ra2.612μm的同時，實現加工精度5μm以內的SKD11慢走絲線切割。
關鍵詞：慢走絲線切割；SKD11；切割速度；表面粗糙度；加工精度
中圖分類號：TG661
文獻標識碼：B
文章編號：1001-2168（2021）09-0070-05
DOI：10.16787/j.cnki.1001-2168.dmi.2021.09.016
Experimental research and parameter optimization for LS-WEDM SKD11
LI Wen-ming1, TANG Dong-sheng2 (1.Department of Mechanical Engineering, Zhonghuan Information College Tianjin University of Technology, Tianjin 300380, China; 2.Tianjin Jinhaitian Precision Mould Co., Ltd., Tianjin 300380, China)
Abstract: 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 5 μm can be achieved while ensuring high cutting speed 86.90 mm2/min and low surface roughness Ra2.612 μm.
Key words: low speed wire electrical discharge machining (LS-WEDM); SKD11; cutting speed; sur? face roughness; machining precision