本文選題：高速沖壓裝備 + 施力機構��； 參考：《浙江大學》2016年碩士論文

【摘要】：施力機構的熱態(tài)特性是影響高速沖壓裝備工作性能最重要的因素之一,在很大程度上決定了高速沖壓裝備的加工精度和加工效率。論文以高速沖壓裝備施力機構為研究對象,分析了施力機構的熱源與熱傳遞方式,給出了施力機構內部發(fā)熱與傳熱的計算公式,提出了考慮多形變機制的接觸熱阻計算模型,通過有限元仿真分析與實驗驗證了提出模型的有效性。在此基礎上,進行了高速沖壓裝備施力機構的熱結構耦合分析,提出了改善施力機構熱態(tài)特性的措施。論文主要研究內容包括:第一章綜述了高速沖壓裝備熱態(tài)特性及優(yōu)化設計研究現(xiàn)狀,分析了現(xiàn)有研究的不足,闡述了論文的研究意義和研究內容。第二章分析了高速沖壓裝備施力機構的熱源分布以及熱傳遞的方式,建立了各熱源發(fā)熱量及對流換熱的計算模型。第三章考慮了動摩擦因素的影響,給出了綜合考慮微凸體的彈性、彈塑性、完全塑性三種形變機制和基體熱阻、收縮熱阻、不同面積接觸點間熱阻的固體接觸面接觸熱阻計算模型。第四章利用提出的模型進行了施力機構的瞬態(tài)熱平衡仿真分析,得到了施力機構的瞬態(tài)溫度場變化及達到熱平衡所需時間,并與不考慮接觸熱阻的仿真結果進行了比較。在此基礎上,將仿真結果與熱平衡實驗結果數(shù)據進行對比,驗證所提出的熱態(tài)特性分析模型和接觸熱阻計算模型的有效性。第五章對高速沖壓裝備施力機構進行了熱結構耦合仿真分析,詳細討論了滑塊、主軸、連桿等主要零件的熱變形情況,并在分析滑塊熱剛度影響因素的基礎上,提出了增強其熱剛度的方法。第六章總結了論文的研究工作,并展望了今后的研究方向。
[Abstract]:The hot state characteristic of the force acting mechanism is one of the most important factors that affect the working performance of high speed stamping equipment. To a great extent, it determines the machining precision and efficiency of the high speed stamping equipment. In this paper, the heat source and heat transfer mode of the force acting mechanism are analyzed, the calculation formula of heat and heat transfer inside the force acting mechanism is given, and the calculation model of contact thermal resistance considering multi-deformation mechanism is put forward. The validity of the proposed model is verified by finite element simulation and experiments. On the basis of this, the thermal structure coupling analysis of the force mechanism of high speed stamping equipment is carried out, and the measures to improve the thermal behavior of the mechanism are put forward. The main contents of this paper are as follows: the first chapter summarizes the research status of hot state characteristics and optimization design of high-speed stamping equipment, analyzes the shortcomings of the existing research, and expounds the significance and content of the research. In the second chapter, the heat source distribution and heat transfer mode of the force acting mechanism of high speed stamping equipment are analyzed, and the calculation models of heat and convection heat transfer of each heat source are established. In the third chapter, considering the influence of dynamic friction factors, three deformation mechanisms including elastic, elastoplastic and complete plasticity, thermal resistance of matrix and thermal resistance of shrinkage are given. Calculation model of contact thermal resistance of solid contact surface between different contact points. In chapter 4, the transient thermal balance of the mechanism is simulated by using the proposed model. The transient temperature field of the mechanism and the time required to achieve the thermal balance are obtained, and the results are compared with the simulation results without considering the contact thermal resistance. On this basis, the simulation results are compared with the results of the thermal balance experiment to verify the validity of the proposed thermal analysis model and the contact thermal resistance calculation model. In chapter 5, the thermal structure coupling simulation analysis of the force applying mechanism of high-speed stamping equipment is carried out, and the thermal deformation of the main parts such as slider, spindle and connecting rod is discussed in detail, and based on the analysis of the factors affecting the thermal stiffness of the slider. A method to enhance its thermal stiffness is proposed. The sixth chapter summarizes the research work of the thesis and looks forward to the future research direction.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TG385

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