摘 要

通過對汽車發(fā)動(dòng)機(jī)活塞離心鑄造過程的正確分析，設(shè)計(jì)了一副一模四腔的離心鑄造模具。詳細(xì)地?cái)⑹隽髓T造模擬過程中用到的各種三維軟件的介紹、模具成型零件包括上模、下模、型芯的設(shè)計(jì)與鑄造過程模擬及結(jié)果分析。
從總體上看，全文分為3個(gè)大部分：
第一部分是緒論部分，主要講述的是整個(gè)設(shè)計(jì)過程需要用到的各種電腦軟件，如UG、Procast、MSC_Patran等，還有就是活塞鑄造在國內(nèi)外的發(fā)展現(xiàn)狀和本次設(shè)計(jì)采用的鑄造方法的選取。
第二部分是模具的初步設(shè)計(jì)，這部分主要是為模擬過程做必要的準(zhǔn)備——模具設(shè)計(jì)，按照常規(guī)的設(shè)計(jì)方法把模具的各個(gè)成型零件部分和型芯部分設(shè)計(jì)出來，這部分使用的軟件為AutoCAD和UG，這部分的要求是要做出模具、型芯和鑄件的裝配圖的三維模型。
第三部分是模擬及分析部分，這部分是要使用Procast、MSC_Patran等軟件把第二部分建好的三維模型用于鑄造模擬過程，這個(gè)部分是本次設(shè)計(jì)的核心部分，它能減少以前模具設(shè)計(jì)中需要大量財(cái)力物力的實(shí)驗(yàn)部分。由于本次設(shè)計(jì)出來的模具模擬過程與預(yù)期要求的基本相同，所以經(jīng)分析后不必要進(jìn)行模具的再度改進(jìn)。




















Abstract

Through the car engine piston centrifugal casting process the correct analysis, design of a four-cavity of a centrifugal casting molds. Detailed description of the casting process simulation used in the various three-dimensional software, including parts on the die-molding, under the model, the core design and casting process simulation and analysis of results.
Overall, the full text is divided into three parts:
The first part is the introduction of the major on the entire design process is the need to use a variety of computer software, such as UG, Procast, MSC_Patran, there is casting the Pistons at home and abroad and the development of this design uses the method of casting Select.
The second part is the preliminary design of mold, this part is mainly to simulate the process of doing the necessary preparations - die design, in accordance with conventional design methods to mold the various parts forming part of the core and designed, this part of the software used to AutoCAD and UG, this part of the request is made to die, core and the casting of three-dimensional model of the assembly.
The third part is part of simulation and analysis, this part is to use Procast, MSC_Patran software such as the second part of the completed three-dimensional model for casting process simulation, this part of this design is the core of the mold before it can reduce design Require substantial financial and material resources in the experimental part. Because of this mold simulation designed with the expected requirements of the process is basically the same, so as to die of unnecessary after the re-improvement.

目 錄

摘 要 I
ABSTRACT II
1. 緒論 1
1.1. 國內(nèi)外現(xiàn)狀 1
1.1.1. 計(jì)算機(jī)輔助設(shè)計(jì)軟件 1
1.1.2. UG軟件簡介 1
1.1.3. MSC-Patran簡介 1
1.1.4. ProCAST簡介 2
1.1.5. ProCAST特點(diǎn) 3
1.1.6. 國內(nèi)外鋁活塞和復(fù)合材料鋁活塞的制造方法 5
1.1.7. 離心鑄造簡介 6
1.2. 課題學(xué)術(shù)和使用意義 8
2. 模具的初步設(shè)計(jì) 9
2.1. 零件結(jié)構(gòu)分析 9
2.2. 離心鑄造設(shè)備的確定 9
2.3. 澆注位置和分型面的確定 10
2.4. 鑄造工藝參數(shù)的確定 10
2.5. 確定鑄件數(shù)量及排列方式 11
2.6. 砂芯和芯頭的設(shè)計(jì) 12
2.7. 確定鑄造成形的澆注系統(tǒng) 13
2.8. 成形模具設(shè)計(jì) 14
3. 鑄造過程的數(shù)值模擬及結(jié)果分析 17
3.1. 網(wǎng)格的劃分 17
3.1.1. MSC-Patran的網(wǎng)格劃分 17
3.1.2. 裝配網(wǎng)格圖形 19
3.2. 模擬的初始條件設(shè)置 20
3.2.1. 檢查網(wǎng)格 20
3.2.2. 定義材料 21
3.2.3. 定義界面的傳熱系數(shù) 21
3.2.4. 定義邊界條件 22
3.2.5. 定義初始條件（溫度與重力條件） 23
3.2.6. 定義運(yùn)行參數(shù) 25
3.3. 模擬過程及模擬結(jié)果的分析 25
3.3.1. 模擬過程 25
3.3.2. 模擬結(jié)果與分析（對溫度場與充型過程分別進(jìn)行分析） 26
4. 結(jié)論與展望 31
結(jié) 束 語 32
參考文獻(xiàn) 33
附 錄 34