本文選題：鑄鋁電機(jī)轉(zhuǎn)子 + 壓鑄模具�。� 參考：《南京理工大學(xué)》2017年碩士論文

【摘要】：鑄鋁電機(jī)轉(zhuǎn)子鼠籠成型過程中,其壓鑄模具與壓鑄機(jī)床常常出現(xiàn)匹配程度不高,制定的工藝參數(shù)易受到噪聲因素干擾等問題。為了滿足企業(yè)實(shí)際需求,以鑄鋁轉(zhuǎn)子鋁籠為對象,設(shè)計(jì)一套能夠?qū)崿F(xiàn)與壓鑄機(jī)床最優(yōu)匹配的壓鑄模具,并確定一組能夠保證內(nèi)部質(zhì)量最優(yōu)、噪聲因素影響不明顯的工藝參數(shù)組合。首先,確定壓鑄模具的澆注系統(tǒng)的形式和結(jié)構(gòu),對壓鑄機(jī)進(jìn)行了選型與校核。利用p-Q2圖技術(shù)對內(nèi)澆口截面積進(jìn)行優(yōu)化,當(dāng)內(nèi)澆口截面積為307.29mm2時(shí),澆注系統(tǒng)與壓鑄機(jī)床的匹配程度達(dá)到最優(yōu)。其次,采用數(shù)值模擬技術(shù),研究直流道水道模型對溫度場影響,模型在第12次熱循環(huán)中,達(dá)到熱平衡狀態(tài)。討論冷卻系統(tǒng)關(guān)鍵參數(shù)對溫度場的影響,結(jié)果表明當(dāng)水溫為50℃、管壁與型腔距離為52mm、冷卻水道管徑為14mm時(shí),具有合理的模具溫度梯度,并且型腔表面升溫速度高。并驗(yàn)證在該冷卻系統(tǒng)下,鑄件符合順序凝固,且縮松縮孔率分布降低。再者,對模具進(jìn)行整體設(shè)計(jì),包括模具型腔零件的尺寸進(jìn)行計(jì)算、根據(jù)充型過程數(shù)值模擬設(shè)計(jì)排氣槽、頂出機(jī)構(gòu)設(shè)計(jì)、壓緊機(jī)構(gòu)設(shè)計(jì)與油缸選型、導(dǎo)向機(jī)構(gòu)設(shè)計(jì),并完成模具的整體裝配。對轉(zhuǎn)子鼠籠的生產(chǎn)工藝進(jìn)介紹,完成了模具的試模,經(jīng)過試模發(fā)現(xiàn)轉(zhuǎn)子表面質(zhì)量良好。最后,通過數(shù)值模擬正交試驗(yàn)和穩(wěn)健性分析、極差分析,確定慢壓快壓轉(zhuǎn)換點(diǎn)為250mm,充型速度為2.5m/s,鋁液溫度680℃,模具溫度為280℃,縮松縮孔體積最小為5.816295cc,且對噪聲因素不敏感,影響的主次為鋁液溫度、模具溫度、充型速度、慢壓快壓轉(zhuǎn)換點(diǎn)。經(jīng)過x光無損探傷檢測表明,建立的數(shù)值模擬模型可以有效反應(yīng)實(shí)際生產(chǎn)縮松縮孔的分布狀態(tài)。經(jīng)過試模,確定最終工藝參數(shù)方案慢壓快壓轉(zhuǎn)換點(diǎn)為280mm,壓射速度為2.73m/s,鋁液溫度692℃,模具溫度為274℃。經(jīng)過研究,設(shè)計(jì)的模具與壓鑄機(jī)床匹配程度高,經(jīng)過調(diào)試的工藝參數(shù)方案能夠使得內(nèi)部關(guān)鍵區(qū)域缺陷減少、縮松縮孔率下降。生產(chǎn)的鑄鋁轉(zhuǎn)子符合工廠的實(shí)際需求,能夠滿足客戶的需求。
[Abstract]:In the process of casting aluminum motor rotor cage, the matching degree between die casting die and die casting machine is not high, and the process parameters are easily disturbed by noise factors. In order to meet the actual needs of the enterprise, a set of die casting mould which can realize the optimum match with the die casting machine tool is designed, and a group of die casting dies which can guarantee the best internal quality is designed. Noise factors have no obvious effect on the combination of process parameters. First, the form and structure of the casting system are determined, and the die casting machine is selected and checked. The cross section area of the inner gate is optimized by using p-Q2 diagram technology. When the cross section area of the inner gate is 307.29mm2, the matching degree between the gating system and the die-casting machine is optimal. Secondly, the numerical simulation technique is used to study the influence of the DC channel model on the temperature field. The model reaches the state of thermal equilibrium in the 12th thermal cycle. The influence of the key parameters of the cooling system on the temperature field is discussed. The results show that when the water temperature is 50 鈩，

本文編號：1836845