本文關鍵詞： 太陽輪 冷擠壓 分步成形 同步成形 參數(shù)優(yōu)化 工藝試驗　出處：《重慶理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：太陽輪是行星齒輪傳動機構中重要的零件,由于其結構復雜,加工要求高,目前主要還是采用傳統(tǒng)的切削加工方法生產(chǎn),即使運用冷擠壓成形工藝加工太陽輪也是先成形外齒,然后再通過拉齒工藝加工出內(nèi)花鍵。采用拉齒工藝等傳統(tǒng)的切削加工方法,不可避免地存在著加工效率低、切削廢料多、成本高,材料的力學性能降低等一系列問題。冷擠壓技術是一種節(jié)能,高效,綠色的精密塑性成形方法,越來越多的企業(yè)選擇冷擠壓成形這種少無切削、節(jié)能環(huán)保的精密塑性成形技術來加工齒輪。但由于太陽輪同時具有外齒和內(nèi)花鍵,形狀復雜,成形困難;擠壓過程中金屬流動復雜,齒形部分的成形質(zhì)量難以保證,這嚴重制約了冷擠壓技術在類似齒輪加工中的推廣應用。本文以具有外齒和內(nèi)花鍵的太陽輪為研究對象,針對其結構特點和數(shù)值模擬分析結果確定了太陽輪內(nèi)外齒分步冷擠壓成形工藝方案。通過數(shù)值模擬分析得到了太陽輪成形過程中的金屬流動規(guī)律和各工藝參數(shù)對成形質(zhì)量及成形載荷的影響規(guī)律;采用彈塑性有限元模型對太陽輪的成形精度進行了研究,得到了模具彈性擴張和擠壓件彈性回復行為對齒輪精度的影響規(guī)律,提出冷擠壓+精整的復合成形工藝,并成形出較高精度的太陽輪外齒和內(nèi)花鍵。根據(jù)數(shù)值模擬結果,進行了太陽輪內(nèi)外齒分步冷擠壓成形工藝試驗。工藝試驗表明,采用分步冷擠壓成形工藝可以加工出質(zhì)量合格的內(nèi)花鍵和外齒,而且分步冷擠壓成形工藝中增加了精整外齒的工藝,在保證內(nèi)花鍵成形質(zhì)量的同時提高了外齒的成形精度。為了滿足企業(yè)進一步降低生產(chǎn)成本,提高生產(chǎn)效率的要求,提出了采用實心坯料同步冷擠壓成形太陽輪內(nèi)外齒的工藝方案;通過數(shù)值模擬分析得到了各工藝參數(shù)對太陽輪同步冷擠壓成形的影響規(guī)律;通過正交實驗設計的方法對各工藝參數(shù)進行了優(yōu)化分析,獲得了最佳工藝參數(shù)組合。
[Abstract]:Solar wheel is an important part of planetary gear transmission mechanism. Because of its complex structure and high processing requirements, the traditional cutting method is mainly used to produce solar wheel. Even if the sun wheel is processed by cold extrusion, the outer teeth are formed first, and then the inner spline is processed by the pull-tooth process. Traditional cutting methods such as pull-tooth technology are adopted. A series of problems inevitably exist, such as low processing efficiency, high cutting waste, high cost and low mechanical properties of materials. Cold extrusion technology is an energy-saving, efficient, green precision plastic forming method. More and more enterprises choose cold extrusion forming, which is a precision plastic forming technology with few cutting, energy saving and environmental protection, to process gears. However, because the sun wheel has both outer teeth and inner splines, the shape is complex and the forming is difficult. During the extrusion process, the metal flow is complicated, and the forming quality of the tooth shape is difficult to guarantee. This seriously restricts the application of cold extrusion technology in similar gear machining. In this paper, the sun wheel with outer teeth and internal spline is taken as the research object. According to its structural characteristics and numerical simulation results, the forming process scheme of the solar wheel was determined. Through the numerical simulation analysis, the metal flow law and the process parameters of the solar wheel forming process were obtained. The influence of forming quality and forming load; The forming accuracy of solar wheel is studied by using elastic-plastic finite element model, and the influence of die elastic expansion and elastic recovery behavior of extrusion parts on gear accuracy is obtained. A cold extrusion finishing compound forming process is proposed, and a high precision solar wheel outer tooth and internal spline is formed. The numerical simulation results are given. The experimental results show that the quality of inner spline and outer tooth can be obtained by the step cold extrusion process. In order to meet the need to further reduce the production cost, the process of finishing the outer teeth is added in the step cold extrusion process, which ensures the forming quality of the inner spline and improves the forming accuracy of the outer teeth at the same time. In order to improve the production efficiency, the technological scheme of forming inner and outer teeth of solar wheel by synchronous cold extrusion of solid billets is put forward. Through numerical simulation analysis, the influence of various technological parameters on synchronous cold extrusion forming of solar wheel is obtained. The optimum combination of process parameters was obtained by orthogonal experimental design.
【學位授予單位】：重慶理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U466;TG376.3

【參考文獻】

相關期刊論文 前10條

1 馮文杰;張磊磊;夏澤雨;陳瑩瑩;楊濤;;太陽輪內(nèi)外齒冷擠壓成形工藝方案研究[J];鍛壓技術;2016年12期

2 馮文杰;付森濤;夏澤雨;陳瑩瑩;劉正偉;;基于數(shù)值模擬的齒輪冷精整齒向精度預測[J];鍛壓技術;2016年01期

3 蔡丹云;丁明明;陳磊;;驅動齒輪冷擠壓成形研究[J];鍛壓技術;2015年06期

4 張亞龍;欒懷超;徐新成;趙中華;;具有外齒和非貫通內(nèi)齒的齒輪擠壓成形研究[J];熱加工工藝;2013年19期

5 李建平;夏祥生;萬元元;陶健全;車路長;;大尺寸內(nèi)齒輪冷擠壓成形工藝研究[J];鍛壓技術;2013年03期

6 崔佳偉;;漸開線圓柱齒輪加工工藝分析[J];無線互聯(lián)科技;2013年05期

7 馮文杰;梁強;陳瑩瑩;祝宇;;大高徑比凸臺縮徑—冷鐓成形工藝方案研究[J];熱加工工藝;2013年01期

8 洪慎章;;《冷擠壓模具設計與制造》講座(連載四)[J];模具制造;2012年01期

9 劉傳根;趙軍靜;;汽車齒輪冷擠壓模具尺寸補償數(shù)值模擬[J];汽車技術;2010年10期

10 胡成亮;施衛(wèi)兵;徐祥龍;趙震;劉全坤;;帶轂直齒輪冷精鍛新工藝及其數(shù)值模擬[J];上海交通大學學報;2009年09期

相關碩士學位論文 前10條

1 薛倩倩;載重汽車變速器輸入軸冷擠壓成形技術研究[D];重慶理工大學;2016年

2 付森濤;載重汽車用齒輪冷擠壓成形精度研究[D];重慶理工大學;2016年

3 何鵬;高強度鋼冷彎成型孔型工藝研究[D];武漢科技大學;2014年

4 單斌;空心軸類零件內(nèi)孔開式反擠壓成形方法研究[D];重慶理工大學;2014年

5 梁強;長軸類大高徑比凸臺冷鐓成形工藝研究[D];重慶理工大學;2013年

6 曾德濤;汽車結合齒冷鍛數(shù)值模擬與工藝研究[D];重慶大學;2013年

7 凌文凱;直齒錐齒輪成形工藝及精度控制的研究[D];重慶理工大學;2012年

8 周琪;鈦合金管材成形加工工藝的數(shù)值模擬研究[D];江蘇科技大學;2011年

9 李湘春;公路運輸樞紐總體布局規(guī)劃研究[D];重慶交通大學;2009年

10 伍權;基于有限元模擬的銜鐵零件擠壓模型腔優(yōu)化設計[D];華中科技大學;2007年

，

本文編號：1471259