本文選題：粉末冶金齒輪 + 表面致密��； 參考：《粉末冶金材料科學(xué)與工程》2015年06期

【摘要】：采用Deform-3D軟件對(duì)相對(duì)密度為90%的Fe-2Cu-0.6C粉末冶金齒輪表面滾壓過(guò)程進(jìn)行有限元模擬,研究滾壓過(guò)程中齒輪應(yīng)力應(yīng)變和相對(duì)密度的分布及變化規(guī)律,并利用標(biāo)準(zhǔn)漸開(kāi)線齒形的工具輪進(jìn)行齒輪坯料滾壓實(shí)驗(yàn)來(lái)驗(yàn)證有限元模擬結(jié)果。模擬結(jié)果表明,輪齒兩側(cè)面的等效應(yīng)變分布存在差異,進(jìn)入滾壓面的最大等效應(yīng)變出現(xiàn)在分度圓附近,退出滾壓面的最大等效應(yīng)變出現(xiàn)在齒頂。齒面上的等效應(yīng)力隨滾壓圈數(shù)增加而快速增大,并逐漸趨于穩(wěn)定。齒面表層相對(duì)密度的提高可分為3個(gè)階段,分別為孔隙快速壓實(shí)階段、密度緩慢增長(zhǎng)階段與密度穩(wěn)定階段。工具輪完成0.6 mm的進(jìn)給后,輪齒表面到心部的相對(duì)密度呈梯度分布,表面形成大約0.3~0.5 mm厚度的致密層(相對(duì)密度≥98%)。實(shí)驗(yàn)結(jié)果與模擬結(jié)果具有較好的一致性,驗(yàn)證了有限元模型的可靠性。
[Abstract]:The surface rolling process of 90% Fe-2Cu-0.6C powder metallurgy gear was simulated by Deform-3D software. The distribution and variation of stress strain and relative density of gear during rolling were studied. The standard involute gear wheel is used to verify the finite element simulation results. The simulation results show that there are differences in the distribution of the equivalent strain between the two sides of the gear tooth. The maximum equivalent strain entering the rolling surface appears near the indexing circle, and the maximum equivalent strain of the exit rolling surface appears at the top of the tooth. The equivalent stress on the tooth surface increases rapidly with the increase of the number of rolling rings and tends to stabilize gradually. The increase of relative density of tooth surface can be divided into three stages, namely, rapid pore compaction, slow density growth and density stabilization. When the tool wheel is fed with 0.6 mm, the relative density from the tooth surface to the center of the gear is gradient distribution, and a dense layer (relative density 鈮，

本文編號(hào)：1966731