【摘要】：針對凸輪常見生產(chǎn)方法存在的材料利用率過低、產(chǎn)量低、生產(chǎn)周期長等問題,嘗試了軋制成形工藝�；贒EFORM剛塑性有限元法建立了凸輪軋槽不變,只改變輥縫的多道次軋制過程的三維有限元模型。模擬分析總延伸系數(shù)不同時(shí)軋件的孔型充滿度,確定出最佳軋制道次為2;分析坯料直徑不同時(shí)軋件的孔型充滿度及變形均勻性,確定出最佳坯料直徑為Φ72 mm。在Ф160 mm×200 mm兩輥軋機(jī)上驗(yàn)證了在最佳軋制道次和坯料直徑下,40Cr凸輪的軋槽不變軋制成形工藝。實(shí)驗(yàn)得到軋件橫截面組織分布與模擬應(yīng)變分布規(guī)律一致,證明了模擬結(jié)果的準(zhǔn)確性。
[Abstract]:Aiming at the problems of low material utilization rate, low production rate and long production cycle, the rolling forming process was tried. Based on deform rigid-plastic finite element method, a three-dimensional finite element model of multi-pass rolling process with constant cam groove and only changing roll gap is established. By simulating and analyzing the pass filling degree of the workpiece with different total extension coefficient, the optimum pass number is determined to be 2, and the pass filling degree and deformation uniformity of the workpiece with different blank diameters are analyzed, and the optimum blank diameter is determined to be 桅 72 mm. The forming process of 40Cr cam under the optimum rolling pass and blank diameter is verified on the 160mm 脳 200mm two-high rolling mill. The experimental results show that the microstructure distribution of the cross section is consistent with the simulated strain distribution, which proves the accuracy of the simulation results.
【作者單位】： 西安建筑科技大學(xué)冶金學(xué)院;陜西省冶金工程技術(shù)研究中心;西北工業(yè)大學(xué)材料學(xué)院;
【分類號】：TG335.4;TH132.47

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