本文選題：熱沖壓模具 + 隨形冷卻水道　； 參考：《大連理工大學(xué)》2016年碩士論文

【摘要】：隨著汽車輕量化技術(shù)發(fā)展的日趨完善,高強度鋼板熱沖壓技術(shù)在實現(xiàn)汽車輕量化的同時,提高了汽車的安全性,對能源的節(jié)約與環(huán)境的保護也都發(fā)揮了應(yīng)有的作用。高強度鋼板在熱沖壓生產(chǎn)過程中,熱沖壓模具承擔(dān)著對其成形和保壓淬火的工作,在保壓淬火過程中,板料降溫速率決定了其成形后零部件的質(zhì)量和力學(xué)性能,因此熱沖壓模具的冷卻效率是決定熱沖壓生產(chǎn)的零部件質(zhì)量能否達到要求的關(guān)鍵因素。熱沖壓模具內(nèi)部設(shè)計的冷卻水道是影響模具冷卻效率的最主要因素,設(shè)計合理、加工工藝先進的冷卻系統(tǒng),能夠保證在工業(yè)生產(chǎn)過程中,模具可以完成對高溫板料進行連續(xù)快節(jié)拍淬火的任務(wù),同時高效的冷卻系統(tǒng)可以有效降低模具的熱疲勞,提高模具表面的溫度均勻性。隨著快速成型技術(shù)的發(fā)展,隨形冷卻水道的加工技術(shù)得到了進一步的完善,且與傳統(tǒng)熱沖壓模具直型冷卻水道相比,針對模具表面特征設(shè)計的隨形冷卻水道具有冷卻效率高、模具表面溫度均勻性好等特點。本文采用數(shù)值模擬仿真技術(shù)對隨形冷卻水道進行優(yōu)化設(shè)計,在傳統(tǒng)的冷卻水道設(shè)計的基礎(chǔ)上提高了設(shè)計的效率和質(zhì)量。為了更準確的模擬實際工況,對模擬仿真過程中涉及到界面換熱系數(shù)、對流換熱系數(shù)等邊界條件進行分析與求解。同時簡化部分邊界條件以提高仿真模擬的效率,并對簡化內(nèi)容進行驗證分析。通過整合試驗設(shè)計與全局優(yōu)化,利用三維建模軟件、有限元分析軟件與優(yōu)化集成軟件,提出系統(tǒng)的隨形冷卻水道設(shè)計優(yōu)化方案,建立高效穩(wěn)定的設(shè)計優(yōu)化流程,提高最終設(shè)計產(chǎn)品的質(zhì)量。通過仿真與實驗相結(jié)合的方式對整個設(shè)計流程的成果進行驗證,分析結(jié)果并提出改進方案,最后得到優(yōu)化后的模具總體冷卻效果明顯提升,模具表面溫度均勻性顯著改善的結(jié)論。此套流程在解決實際工業(yè)生產(chǎn)中設(shè)計環(huán)節(jié)的問題時有一定的參考與借鑒價值。
[Abstract]:With the improvement of the development of automobile lightweight technology, the high strength steel sheet hot stamping technology improves the safety of automobile while realizing automobile lightening. It also plays an important role in the conservation of energy and the protection of the environment. In the process of hot stamping, the hot stamping die bears the forming and pressing quenching of the hot stamping die. In the process of fire protection, the cooling rate determines the quality and mechanical properties of the parts after forming, so the cooling efficiency of the hot stamping die is the key factor to determine the quality of the parts of the hot stamping die. The cooling efficiency of the die is the most important factor affecting the cooling efficiency of the hot stamping die. The main factors, reasonable design and advanced processing technology, can ensure that in the process of industrial production, the mold can finish the task of continuous fast speed quench for high temperature sheet material. At the same time, the high efficiency cooling system can effectively reduce the thermal fatigue of the die and improve the temperature uniformity of the mold surface. The processing technology of the shaped cooling channel has been further improved. Compared with the traditional hot stamping die direct cooling channel, the cooling water channel designed for the surface characteristics of the die has the characteristics of high cooling efficiency and good uniformity of the surface temperature of the die surface. This paper uses the numerical simulation technology to optimize the shape cooling channel. The design has improved the efficiency and quality of the design on the basis of the traditional cooling channel design. In order to simulate the actual working conditions more accurately, the boundary conditions, such as the interface heat transfer coefficient and the convection heat transfer coefficient, are analyzed and solved in the simulation process, and the partial boundary conditions are simplified to improve the efficiency of simulation and to simplify the simulation. Through the integration of experimental design and global optimization, using three-dimensional modeling software, finite element analysis software and optimization integration software, the design optimization scheme of the system is proposed, the efficient and stable design optimization process is established to improve the quality of the final design products. The result of the whole design process is verified, the results are analyzed and the improvement scheme is put forward. Finally, the overall cooling effect of the mold is improved obviously and the temperature uniformity of the die surface is improved remarkably. This set of flow has some reference and reference value when solving the problem of the design link in the actual industrial production.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U466

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