粉末熱鍛凸輪的數(shù)值模擬
發(fā)布時間:2019-03-25 10:22
【摘要】:凸輪作為裝配式凸輪軸上的關(guān)鍵零部件之一,其制造技術(shù)很大程度上影響著凸輪軸及發(fā)動機的發(fā)展。采用驗證實驗的方法確認有限元法模擬粉末熱鍛凸輪的壓制及熱鍛成形過程的合理性,在此基礎(chǔ)上利用數(shù)值模擬法對凸輪的壓制方式進行改進、優(yōu)化熱鍛工藝參數(shù)。針對粉末壓制成形工藝,對不同壓制方式下(單向壓制、雙向壓制、浮動壓制、摩擦壓制)的壓坯密度進行模擬分析。而針對熱鍛工藝則研究分析鍛壓速度、摩擦因數(shù)、坯料加熱溫度、模具預(yù)熱溫度、坯料初始相對密度5組因素對鍛件密度分布的影響,從而獲得最佳的工藝方案。
[Abstract]:As one of the key components of the assembled camshaft, the manufacturing technology of cam greatly affects the development of camshaft and engine. The rationality of the finite element method to simulate the pressing and forming process of powder hot forging cam is confirmed by the method of verification experiment. On the basis of this, the numerical simulation method is used to improve the compaction mode of the cam and optimize the technological parameters of hot forging. According to the powder compaction process, the compacting density of different compacting modes (unidirectional pressing, bi-directional pressing, floating pressing, friction pressing) was simulated and analyzed. For hot forging process, the effects of forging speed, friction coefficient, billet heating temperature, die preheating temperature and initial relative density of billet on the density distribution of forging are studied and analyzed, so as to obtain the best technological scheme.
【作者單位】: 南京理工大學(xué)材料科學(xué)與工程學(xué)院;南京理工大學(xué)工程訓(xùn)練中心;南京技師學(xué)院機械工程系;
【分類號】:TK403;TF125
本文編號:2446883
[Abstract]:As one of the key components of the assembled camshaft, the manufacturing technology of cam greatly affects the development of camshaft and engine. The rationality of the finite element method to simulate the pressing and forming process of powder hot forging cam is confirmed by the method of verification experiment. On the basis of this, the numerical simulation method is used to improve the compaction mode of the cam and optimize the technological parameters of hot forging. According to the powder compaction process, the compacting density of different compacting modes (unidirectional pressing, bi-directional pressing, floating pressing, friction pressing) was simulated and analyzed. For hot forging process, the effects of forging speed, friction coefficient, billet heating temperature, die preheating temperature and initial relative density of billet on the density distribution of forging are studied and analyzed, so as to obtain the best technological scheme.
【作者單位】: 南京理工大學(xué)材料科學(xué)與工程學(xué)院;南京理工大學(xué)工程訓(xùn)練中心;南京技師學(xué)院機械工程系;
【分類號】:TK403;TF125
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