本文選題：高壓潤滑　切入點：拔制力　出處：《燕山大學》2015年碩士論文

【摘要】：冷拔管由于其良好的性能,廣泛用于我國工業(yè)建設中,有“工業(yè)血管”之稱。然而,用于高新產品中的冷拔管與普通冷拔管不同,它要求管材的尺寸精度更高,表面質量更好。而傳統(tǒng)的拉拔工藝生產的管材很難達到高精度管材的要求,拉拔后的產品仍需經過打磨拋光等工序才能達到要求。短芯棒管材拉拔工藝用于管材內外徑尺寸及表面質量均要求較高的精密管材的拉拔生產。但由于芯棒與管材內表面之間的潤滑散熱不良,極易發(fā)生膠合,難于生產出合格的產品。鋼管內外模高壓潤滑冷拔成形技術是基于短芯棒拉拔工藝的創(chuàng)新,采用邊界潤滑減小摩擦對拉拔過程的影響,減小拉拔力;且散熱良好,從而提高了冷拔后管材的精度。本文主要研究工作有:1.考慮密封缸液體壓力對管尾端的推力作用,推導出內外高壓潤滑拉拔條件下的拉拔力計算公式;2.利用有限元仿真軟件MSC.Marc對管端縮口成形工藝過程進行模擬。重點研究了縮口成形極限及不同厚徑比對管材成形極限的影響,并簡單分析了應力分布規(guī)律及工藝參數(shù)對縮口力的影響;3.利用限元仿真軟件MSC.Marc對冷拔過程進行模擬,分析了軸向應力、徑向應力、剪應力、米塞斯應力的分布規(guī)律。研究了密封缸內壓力對軸向應力的影響,并通過軸向應力模擬值和計算值的比較,證明了拉拔力公式的準確性;4.通過大量的模擬,分析了摩擦系數(shù)、模角、拉拔速度、斷面收縮率及密封缸液體壓力等對拉拔力的影響,從中得到了最佳模錐角,并對管材斷面收縮的極限進行了研究;5.對實際生產遇到的問題進行了分析,并提出了解決措施。以上的研究成果,可為實際生產提供理論支持和技術指導。
[Abstract]:Cold-drawn tube is widely used in industrial construction of our country because of its good performance.However, the cold drawing pipe used in high-tech products is different from the common cold drawn tube, which requires higher dimensional accuracy and better surface quality.The pipe produced by traditional drawing process is difficult to meet the requirement of high precision pipe, and the product after drawing still needs to be polished and polished to meet the requirements.Short mandrel tubing drawing process is used in the production of precision pipe with high internal and external diameter and surface quality.However, due to the poor lubrication and heat dissipation between the mandrel and the inner surface of the pipe, it is easy to glue and produce qualified products.The technology of high pressure lubrication cold drawing for inner and outer die of steel tube is based on the innovation of short mandrel drawing process. Boundary lubrication is adopted to reduce the influence of friction on drawing process and to reduce drawing force, and the heat dissipation is good, thus improving the precision of the tube after cold drawing.The main research work of this paper is: 1.Considering the thrust effect of the liquid pressure on the end of the pipe, the formula for calculating the drawing force under the condition of internal and external high pressure lubrication drawing is deduced.Finite element simulation software MSC.Marc is used to simulate the forming process.The influence of shrinkage forming limit and different thickness / diameter ratio on the forming limit of pipe is studied emphatically, and the influence of stress distribution law and process parameters on shrinkage force is simply analyzed.The finite element simulation software MSC.Marc is used to simulate the cold drawing process and the distribution of axial stress radial stress shear stress and Mises stress are analyzed.The influence of the pressure in the seal cylinder on the axial stress is studied, and the accuracy of the drawing force formula is proved by comparing the simulated and calculated values of the axial stress.The influence of friction coefficient, die angle, drawing speed, cross section shrinkage ratio and liquid pressure of seal cylinder on drawing force are analyzed through a large number of simulations. The optimum die cone angle is obtained, and the limit of cross section shrinkage of pipe is studied.The problems encountered in actual production are analyzed, and the solving measures are put forward.The above research results can provide theoretical support and technical guidance for actual production.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG356

【參考文獻】

相關期刊論文 前10條

1 劉鐵軍;;我國冷拔管技術的發(fā)展[J];安徽冶金;2002年02期

2 任蜀焱;陳志躍;彭家國;孫元;;冷拔軸承鋼管生產質量控制[J];重慶科技學院學報(自然科學版);2012年04期

3 孫德志,馬先貴,姚玉泉;邊界潤滑及混合潤滑條件下的摩擦系數(shù)[J];東北工學院學報;1988年03期

4 張濤 ,林剛 ,周景龍;旋壓縮口過程的三維有限元數(shù)值模擬[J];鍛壓技術;2001年05期

5 高昂;王德廣;鄧小民;;不同拉拔工藝對管材尺寸精度的影響[J];鋼管;2008年01期

6 杜鳳山，，吳維勇，劉才，陸衛(wèi)平，張建宇;管材空拔成形過程的計算機仿真[J];工程力學;1998年03期

7 南清安，侯立寧;高精度冷拔鋼管的拔制原理及特點分析[J];煤炭科學技術;1996年10期

8 徐慧,郭勝利,李天生;塑性成形中摩擦與潤滑問題初步再探討[J];內蒙古石油化工;2005年08期

9 張琪昌,王煒,溫殿英,郝淑英;高道次冷拔鋼管抖紋問題分析[J];天津大學學報;2005年04期

10 劉升;李浩進;王伯文;;方圓管固定短芯棒拉拔工藝分析[J];武漢科技大學學報;2011年06期

相關碩士學位論文 前3條

1 古麗;大口徑三通管件成形工藝與計算機模擬[D];天津理工大學;2010年

2 張召鐸;銅管拉拔成形摩擦機理及潤滑劑性能測試裝置研究[D];山東大學;2005年

3 李瑋;管材塑性加工過程數(shù)值模擬研究[D];山東大學;2008年

本文編號：1701571