ZW32-12戶外柱上真空斷路器箱體成型的數值模擬

機械設計制造及其自動化論文，論文編號:JX1298 論文字數:25440.頁數:58 附任務書，開題報告，文獻綜述,外文翻譯

摘   要
 矩形盒件在拉深過程中材料的變形比較復雜,其變形規律以方形盒件為基礎, 但又與方形盒件有區別。起皺和破裂是其拉深成形過程中的主要失效形式,而影響其成形質量的主要因素是壓邊力、材料機械性能、拉深模具參數、摩擦條件及板坯形狀和厚度等。目前, 雖然已經對矩形盒件的成形在理論分析和實驗研究方面做了大量的工作, 但因其變形的復雜性, 還不能像圓筒形件和方形盒件那樣得出較為成熟的理論分析。隨著有限元軟件和計算機技術的不斷發展, 在模具設計制造之前，可以運用有限元分析技術，模擬沖壓過程，預測拉深過程中可能產生的起皺和破裂，及時修改沖壓件的結構尺寸形狀使之符合沖壓件的沖壓工藝條件。使得對矩形件成型規律的數值模擬成為可能。而有限元分析的前提是建立產品的三維SOLIDWORKS模型，并以Parasolid(*.x_t)格式保存導入有限元分析軟件進行分析預測起皺和破裂可能性。
 本文以ZW32-12戶外柱上真空斷路器箱體為例，論述了凹模上打孔和毛坯上打孔工藝方法。從建立產品的三維SOLIDWORKS模型與有限元分析過程入手,分別對成形區域、安全區域、主應力等方面進行分析，分析結果表明存在應力集中區域，給出了發生起皺和破裂的成形極限圖，表明了該斷路器箱體的工藝設計存在缺陷，要多次完成拉深成形或更換拉深件材料等方法，以此分析結果，可作為模具設計制造的理論依據，同時可縮短真空斷路器箱體產品開發周期，降低產品生產成本。

關鍵詞：矩形盒件 SOLIDWORKS模型 有限元分析

Abstract
 In the process of rectangular box parts deep drawing shape, the material deformation is comparative complex.Its deformation law based on the square box parts, But with a square box parts of differentiated. Wrinkling and cracking are major invalidation in the deep drawing. And the major factor that affect on the quality of shape is the BHF, the mechanical properties of materials, drawing die parameters, friction conditions , slab shape ,thickness and so on. At the present time, although the rectangular box in the shape of the theoretical analysis and experimental research done a lot of work, but because of the complexity of the deformation, not as Cylindrical parts and as a square box parts that is more mature theory analysis. With the finite element software and computer technology continues to develop. before the die design production, making use of finite element analysis simulate the punching process, predict the wrinkling and cracking in the deep drawing process, modifies the structure size of the stamping to make it match the punching process condition of the stamping. Rectangular pieces of molding to make the numerical simulation of possible.But the premise of the finite element analysis is building up the 3D SOLIDWORKS model, and duct into the finite element analysis software by the Parasolid(*.x_t) format, then analysis and estimate the possibility of wrinkling and cracking.
 This text uses a chest of the ZW32-12 open air vacuseal breaker in the pillar for instance, discuss the technological proess of punching in the cavity die and the workhank.From the establishment of 3D CAD model and the process of finite element analysis, analysis respectively from forming zone, safety zone, major strain etc, the result enunciation existence strain concentration zone, given the breakdown occurred and wrinkle forming limit map, show that the circuit breaker box there are shortcomings in the design process, the need for a complete repeatedly drawing or replacement of drawing materials and so on. This analysis result, can be the theory basis of die design production, also can shorten the exploitation period of automobile panels, lower the cost of production.
 
Keywords：Rectangular box parts；Solidworks model；Finite element analysis
目  錄
摘   要 I
Abstract II
第1章  緒  論 1
1.1  課題背景、目的、意義 1
1.2  國內外研究現狀分析 1
1.3  本文主要研究的內容 3
第2章  矩形拉伸件毛坯的展開計算 4
2.1  矩形件拉深變形機理及分析 4
2.2  毛坯合理形狀的簡化作圖方法 4
2.3 本章小結 7
第3章  三維造型的設計方法 8
3.1  三維造型方法 8
3.1.1 三維線框造型 8
3.1.2三維曲面造型 9
3.1.3 三維實體造型 10
3.2 SOLIDWORKS 11
3.2.1 SOLIDWORKS2008的特點 11
3.2.2 SOLIDWORKS的造型方法 12
3.3 本章小結 14
第4章  真空斷路器箱體 15
4.1 真空斷路器箱體起皺、開裂及缺角現象的分析 15
4.1.1 拉伸件加工工藝 16
4.2  拉伸件設計及制造時應注意的問題 18
4.2.1 零件底部轉角部分易拉裂 18
4.2.2 零件口緣起皺 19
4.2.3零件表面粗糙度較差引起直邊起皺 19
4.2.4壓邊圈 19
4.2.5判別拉伸次數并制定各工序毛坯尺寸 19
4.2.6 拉伸的熱現象分析 20
4.2.7 零件成型后脫模苦難的原因及改進 21
4.3模具壽命分析 21
4.3.1 模具的失效分析 21
4.3.2 影響模具壽命的因素 22
4.3.3 改善措施 22
4.4 本章小結 23
第5章  有限元分析軟件 25
5.1 ANSYS有限元分析軟件 25
5.2 SolidWorks模型導入ANSYS的接口處理 27
5.2.1 SolidWorks文件的保存 27
5.2.2在ANSYS中導入SolidWorks模型 27
5.3 LS-DYNA 28
5.4 LS-PREPOST 29
5.5 有限元分析系統的發展現狀及趨勢 29
5.6 本章小結 31
第6章  設計內容 32
6.1真空斷路器箱體工程圖分析 32
6.2 繪制SOLIDWORKS三維圖 32
6.2.1 繪制箱體產品圖 32
6.2.2 繪制三維模型 32
6.3毛坯展開 40
6.4 有限元分析 40
6.5成形性能評價標準 42
6.6分析結果 43
6.7 本章小結 49
第七章  總  結 50
參考文獻 51
致  謝 53