摘 要
能源短缺及環(huán)境污染問題已經(jīng)成為制約汽車產(chǎn)業(yè)發(fā)展的突出問題，無論從社會效益還是從經(jīng)濟效益來考慮，低油耗、低排放的汽車都是節(jié)約型社會發(fā)展的需要。汽車輕量化技術(shù)是汽車節(jié)油的重要手段。汽車輕量化技術(shù)包括汽車結(jié)構(gòu)的合理設(shè)計和輕量化材料的使用兩大方面。鎂合金是極具競爭力的汽車輕量化材料。
本論文以重慶長安汽車有限公司某款微型車的鎂合金汽車座椅骨架開發(fā)過程為對象，在滿足法規(guī)要求的前提下，在鎂合金汽車座椅的材料替代研究和結(jié)構(gòu)再設(shè)計結(jié)果基礎(chǔ)上，進行了壓鑄工藝優(yōu)化設(shè)計，并運用AnyCasting鑄造過程仿真軟件對充型和凝固過程進行數(shù)值模擬，并對結(jié)果進行分析。
本文的研究為鎂合金在汽車座椅上的生產(chǎn)應(yīng)用提供了理論和技術(shù)上的支持，同時達到提高汽車座椅的安全性和舒適性，縮短產(chǎn)品開發(fā)周期和降低成本的目的。


關(guān)鍵詞：鎂合金，座椅，壓鑄工藝，數(shù)值模擬


























ABSTRACT
Energy sources shortage and pollution problems of the environment have become serious problems that limit the development of the automobile industry.Whether taking social or economic benefits into consideration, cars with low fuel consumption and low emissions meet the demand of developing a economized society. Automotive lightweight technology is an important means of saving fuel of cars. And there are two major aspects included in the automotive lightweight technology : reasonable design of structures in cars and use of lightweight materials in which magnesium alloy is highly competitive.
On the basis of sufficient acquaintances with magnesium alloy material and magnesium alloy die casting technology, this paper makes a brief introduction on the performance requirements of car seats and the status of research on alternative materials. After analyzing the development process of the magnesium alloy car seats framework of Chongqing Chang'an Automobile Co., Ltd, a geometric model of magnesium alloy car seats is established in the paper. Based on the geometric model of framework of car seats,this paper designs a die casting process, and makes numerical simulation of the mold filling and concreting process with the help of AnyCasting software,and then analyzes possible vulnerabilities,improves the system of pouring row, and finally gets the programme that has been optimized.
This paper focuses on the application of new materials in automotive components, which is of great significance for automotive lightweight technology on the premise that this is under the rules and laws. The research on this paper provides theoretical and technical support to the production and application of magnesium alloy in the automobile seats,with which we can achieve the goal of improving the safety and comfort of car seats, reducing inventory and costs at the same time.


Key words: magnesium alloys, seats, die casting process, numerical simulation



目 錄

中文摘要 .Ⅰ
英文摘要 Ⅱ
1緒論 1
1.1 引言 1
1.2 汽車輕量化的發(fā)展現(xiàn)狀及實現(xiàn)途徑 2
1.2.1 汽車輕量化技術(shù)的發(fā)展現(xiàn)狀 2
1.2.2 汽車輕量化的實現(xiàn)途徑 2
1.3 鎂合金壓鑄的研究及應(yīng)用現(xiàn)狀 3
1.3.1 壓鑄鎂合金在汽車行業(yè)的應(yīng)用 3
1.3.2 鎂合金壓鑄業(yè)現(xiàn)狀 3
1.3.3 我國鎂合金壓鑄的發(fā)展方向 3
1.4 計算機數(shù)值模擬概述 4
1.5 本課題研究的主要內(nèi)容 5
2 鎂合金汽車坐盆壓鑄工藝的設(shè)計 6
2.1 內(nèi)澆口的設(shè)計 6
2.1.1 內(nèi)澆口設(shè)計的原則 7
2.1.2 內(nèi)澆口的尺寸確定 7
2.2 橫澆道的設(shè)計 9
2.2.1 橫澆道的設(shè)計要點 9
2.2.2 扇形橫澆道的設(shè)計 10
2.3 直澆道的設(shè)計 10
2.4 溢流槽的設(shè)計 12
2.4.1 溢流槽的作用 12
2.4.2 溢流槽的設(shè)計要點 12
2.5 壓鑄工藝參數(shù)的確定 12

2.5.1 壓力 13
2.5.2 速度 13
2.5.3 溫度 14
3 鎂合金壓鑄工藝CAE 16
3.1 壓鑄工藝CAE 16
3.2 CAE軟件的結(jié)構(gòu)及其系統(tǒng)組成 16
3.3 AnyCasting軟件簡介 18
3.4 基于AnyCasting軟件的數(shù)值模擬過程 20
3.4.1 三維實體建模 20
3.4.2 前處理過程 23
3.4.3 模擬運算過程 24
3.4.4 后處理過程 25
4 模擬結(jié)果分析 26
4.1 充型過程分析 26
4.2 凝固過程分析 28
4.3 模擬結(jié)果總結(jié) 30
5 結(jié)論 32
致 謝 33
參考文獻 34