本文關(guān)鍵詞： 液態(tài)模鍛機(jī)機(jī)架 ANSYS Workbench 溫度場(chǎng) 熱-結(jié)構(gòu)耦合 變形　出處：《浙江工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：液態(tài)模鍛是一種能夠有效避免鑄件氣孔、縮孔、疏松等缺陷的優(yōu)質(zhì)、高效、節(jié)能、適應(yīng)性廣的現(xiàn)代制造工藝。由于其各方面的優(yōu)越性,液態(tài)模鍛工藝已在工業(yè)生產(chǎn)中得到廣泛應(yīng)用。液態(tài)模鍛液壓機(jī)是實(shí)現(xiàn)液態(tài)模鍛工藝的基礎(chǔ)設(shè)備,其剛度強(qiáng)度性能直接影響到整機(jī)的安全和產(chǎn)品的質(zhì)量及生產(chǎn)效率,以往對(duì)液態(tài)模鍛液壓機(jī)機(jī)架的設(shè)計(jì)和研究常是在單獨(dú)考慮力載荷的情況下進(jìn)行的,但在實(shí)際工作過(guò)程中,具有溫度的模具不可避免地對(duì)機(jī)架產(chǎn)生一定的熱影響,使機(jī)架產(chǎn)生熱應(yīng)力和熱變形。本文以6300KN多向液態(tài)模鍛液壓機(jī)為研究對(duì)象,采用Solidworks和ANSYS Workbench軟件,對(duì)極限熱源、滿載工況下的液態(tài)模鍛液壓機(jī)機(jī)架進(jìn)行了熱-結(jié)構(gòu)耦合分析,得到了機(jī)架的溫度場(chǎng)和應(yīng)力變形場(chǎng)分布情況,對(duì)機(jī)架進(jìn)行了剛度強(qiáng)度校核,并與機(jī)架的結(jié)構(gòu)靜力分析結(jié)果進(jìn)行對(duì)比分析,發(fā)現(xiàn)在同時(shí)考慮熱載荷和力載荷的情況下,液壓機(jī)機(jī)架不能滿足剛度要求,說(shuō)明在設(shè)計(jì)和研究液態(tài)模鍛機(jī)機(jī)架時(shí)考慮熱影響的必要性。本文對(duì)影響機(jī)架應(yīng)力變形的熱因素和結(jié)構(gòu)因素進(jìn)行了研究,發(fā)現(xiàn)隔熱板厚度和活動(dòng)橫梁結(jié)構(gòu)對(duì)機(jī)架最大變形值的影響比較顯著,在此基礎(chǔ)上,提出合理的改進(jìn)方案,使機(jī)架滿足剛度強(qiáng)度要求,并對(duì)影響活動(dòng)橫梁導(dǎo)向正確性的立柱-動(dòng)梁導(dǎo)套間的側(cè)隙在不同偏心距下進(jìn)行了研究,為活動(dòng)橫梁立柱孔的設(shè)計(jì)和活動(dòng)橫梁的安裝提供了一定指導(dǎo)。液態(tài)模鍛液壓機(jī)經(jīng)常承受多次反復(fù)加載及卸載,后者會(huì)引起劇烈的振動(dòng)與晃動(dòng),立柱容易發(fā)生高周疲勞,故本文在對(duì)改進(jìn)后機(jī)架進(jìn)行熱-結(jié)構(gòu)耦合分析的基礎(chǔ)上,對(duì)立柱進(jìn)行了疲勞壽命分析,得到立柱在考慮力載荷和熱載荷時(shí)滿足疲勞壽命和疲勞強(qiáng)度要求,并為立柱的實(shí)際使用壽命提供預(yù)測(cè)。
[Abstract]:Liquid die forging is a kind of modern manufacturing technology which can effectively avoid defects such as porosity, shrinkage, porosity and so on. It is of high quality, high efficiency, energy saving and wide adaptability. Liquid die forging technology has been widely used in industrial production. Liquid die forging hydraulic press is the basic equipment to realize liquid die forging process. Its stiffness and strength performance directly affect the safety of the whole machine and the product quality and production efficiency. In the past, the design and research of the liquid die forging hydraulic press frame was carried out under the condition of considering the force load alone. However, in the actual working process, the mold with temperature will inevitably have a certain thermal impact on the frame. The thermal stress and deformation of the frame are produced. This paper takes 6300KN multi-direction liquid die forging hydraulic press as the research object, and adopts Solidworks and ANSYS Workbench software. The thermo-structural coupling analysis of the liquid die forging hydraulic press frame under the limit heat source and full load condition is carried out, the distribution of temperature field and stress and deformation field of the frame is obtained, and the stiffness strength of the frame is checked. Compared with the static analysis results of the frame, it is found that the hydraulic press frame can not meet the requirements of stiffness when the thermal load and the force load are considered at the same time. It is necessary to consider the thermal effect in the design and study of the liquid die forging machine frame. The thermal and structural factors affecting the stress and deformation of the frame are studied in this paper. It is found that the thickness of the insulation plate and the structure of the moving beam have a significant effect on the maximum deformation value of the frame. On this basis, a reasonable improvement scheme is put forward to make the frame meet the requirements of stiffness and strength. The clearance between column and guide sleeve of moving beam is studied under different eccentricity. The liquid die forging hydraulic press is often subjected to repeated loading and unloading, the latter will cause violent vibration and sloshing. The column is prone to high cycle fatigue, so the fatigue life of the column is analyzed on the basis of the thermal-structural coupling analysis of the improved frame. The results show that the column meets the requirements of fatigue life and fatigue strength when considering the force load and thermal load, and provides a prediction for the actual service life of the column.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG315.4

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