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MENG Zhian,LU Suling,YAN Huajun,HAN Pengbiao,HU Xilei,WANG Tonghui,WANG Hao.Process analysis and simulation of flat forging and forming steel tie rod U-shaped head preforms with super large[J].Journal of Hebei University of Science and Technology,2021,42(1):82-90
超大高徑比棒料平鍛成形鋼拉桿U型頭預制坯工藝分析及模擬
Process analysis and simulation of flat forging and forming steel tie rod U-shaped head preforms with super large
Received:October 05, 2020  Revised:November 25, 2020
DOI:10.7535/hbkd.2021yx01011
中文關鍵詞:  塑性加工工藝與設備  大高徑比  鐓粗聚料  數值模擬  預制坯
英文關鍵詞:plastic forming processing and equipment  large height-diameter ratio  upsetting aggregate  numerical simulation  preforms
基金項目:河北省科技計劃重點項目(15211804D); 河北科技大學教育教學改革研究重點項目(2019-ZDA01)
Author NameAffiliationE-mail
MENG Zhian School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang;Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang  
LU Suling School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang;Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang  
YAN Huajun School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang;Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang  
HAN Pengbiao School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang;Hebei Key Laboratory of Material Near-Net Forming Technology, Shijiazhuang hpb68@163.com 
HU Xilei Heye Special Steel Company Limited, Shijiazhuang  
WANG Tonghui Juli Sling Company Limited, Baoding  
WANG Hao Juli Sling Company Limited, Baoding  
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中文摘要:
      為了解決傳統U型鋼拉桿存在的生產工藝落后、加工周期長、材料利用率低等問題,提出一體式鋼拉桿成形工藝。以35型鋼拉桿U型頭預制坯的成形為研究對象,設計了3道次加熱鐓粗方法,采用DEFORM-3D有限元軟件分析了不同工藝條件下鐓粗后溫度場、應力場的模擬結果,探討了成形效果較佳的熱成形工藝參數,并通過實驗驗證成形的可行性。結果表明,各道次較佳的熱成形工藝參數如下:第1道次始鍛溫度為1 150 ℃、沖頭速度為20 mm/s,第2道次始鍛溫度為1 150 ℃、沖頭速度為30 mm/s,第3道次始鍛溫度為1 100 ℃、沖頭速度為20 mm/s;在該熱成形工藝參數下,各道次的成形力分別為1 520,2 090,5 290 kN,各道次的脹模力分別為5 870,6 710,8 830 kN;鐓粗后金屬流線分布合理,沒有出現交叉、折疊等現象,成形效果較好。采用3道次熱鐓粗方法制備預制坯,制件內部的等效應力分布都比較均勻,可以形成質量良好的制件,研究結果可為35型鋼拉桿U型頭預制坯的鐓粗聚料工藝設計以及設備選擇提供參考。
英文摘要:
      In order to solve the problems of backward production technology, long processing cycle and low material utilization rate in traditional U-shaped steel tie rods, an integrated steel tie rod forming process was proposed. Taking the preform forming of 35 steel tie rod U-shaped head as the research object, a three-pass heating upsetting method was designed. The DEFORM-3D finite element software was used to analyze the simulation results of the temperature field and stress field after upsetting under different process conditions. The hot forming process parameters with better forming effect were discussed, and the feasibility of forming was verified through experiments. The results show that the optimum hot forming process parameters of each pass are as follows: the initial forging temperature of the first pass is 1 150 ℃, while the punch speed is 20 mm/s; the initial forging temperature of the second pass is 1 150 ℃, while the punch speed is 30 mm /s; the initial forging temperature of the third pass is 1 100 ℃, while the punch speed is 20 mm/s. Under the hot forming process parameters, the forming forces of each pass are 1 520, 2 090, 5 290 kN, and the expansion forces of each pass are 5 870, 6 710, 8 830 kN, respectively. After upsetting, the metal streamline distribution is reasonable, there is no crossover and folding phenomenon, and the forming effect is good. The equivalent stress distribution inside the part is relatively uniform while preparing the preform in the three-pass hot upsetting method, which can form a good quality part. It provides a certain reference for the upsetting aggregate process design and equipment selection of the U-shaped head perform of 35 steel tie rod.
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