(1. 沈陽理工大學(xué) 材料科學(xué)與工程學(xué)院，沈陽 110159；
2. 中國科學(xué)院 金屬研究所，沈陽 110016)
摘 要: 通過對(duì)某公司原有TP2銅管三聯(lián)拉工藝進(jìn)行延伸系數(shù)和變形量的計(jì)算，發(fā)現(xiàn)該工序變形量大、對(duì)管材質(zhì)量的影響大，且尚有可優(yōu)化空間。運(yùn)用有限元分析軟件MSC.Marc對(duì)此工藝進(jìn)行數(shù)值模擬研究，得出溫度和等效應(yīng)力隨變形率、拉拔道次和拉拔速度變化的規(guī)律。對(duì)原有拉拔工藝中的變形溫度進(jìn)行實(shí)驗(yàn)測(cè)量，將實(shí)驗(yàn)結(jié)果與有限元分析結(jié)果進(jìn)行比較，驗(yàn)證有限元模型與真實(shí)工藝的符合程度，為聯(lián)合拉拔工藝的合理改進(jìn)提供理論依據(jù)，并以此為基礎(chǔ)提出優(yōu)化工藝方案。綜合對(duì)比分析原有的拉拔工藝和優(yōu)化的拉拔工藝，發(fā)現(xiàn)優(yōu)化工藝增大了各道次的變形率，使得變形溫度有所提高，但等效應(yīng)力的變化幅度較小，優(yōu)化工藝方案切實(shí)可行。
關(guān)鍵字: 三聯(lián)拉工藝；溫度；等效應(yīng)力；數(shù)值模擬；優(yōu)化工藝
（1. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110159, China;
2. Institute of Metals Research, Chinese Academy of Sciences, Shenyang 110016, China）
Abstract:The triple tube drawing process plays a significant role in large deformation and high-quality tube drawing program which can still be optimized when the elongation coefficient and deformation were computed depending on some company’s existing triple TP2 tube drawing process. The relationships among temperature, equivalent stress and deformation rate, drawing passes, drawing velocity were obtained by using the FEM software MSC.Marc. The optimized FEM model can stand for the real process, the deformation temperature of the original process was measured and contrasted with FEM result. The optimized process strategy was putted forward by the support of above mentioned analysis and corresponding theory. The optimized tube drawing process is proved to have a high pass-deformation rate which causes an apparent temperature rising, but exerts a little influence on the equivalent stress. Whatsmore, it is improved that the drawing process project is feasible.
Key words: triple drawing process; temperature; equivalent stress; numerical simulation; optimized process
