汽車縱梁模具設計

機械論文編號:JX852  論文字數:9497.頁數:32   附圖

目  錄
中文摘要................................................................. i
英文摘要................................................................. ii
目錄.....................................................................iii
第一章    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本論文主要研究的內容 ........................................... 1
第二章    縱梁彎曲模設計 ................................................ 2
      2.1縱梁彎曲分析.................................................... 2
          2.1.1變形程度及表示............................................ 2
          2.1.2變形區域的應力、應變分析 ................................. 4
          2.1.3變形特點分析 ............................................. 5
      2.2彎曲力計算 ..................................................... 7
          2.2.1彎曲與校正時彎曲力計算 ................................... 7
          2.2.2壓力機公稱壓力的計算 ..................................... 8
      2.3彎曲模數據分析 ................................................. 9
          2.3.1凹模與凸模的計算 ......................................... 9
          2.3.2凹模與凸模橫向尺寸及制造公差 .............................11
      2.4縱梁彎曲模防回彈措施 ...........................................13
第三章    Ansys有限元分析 ................................................14
      3.1 Ansys有限元簡介 ................................................14
      3.2 Ansys有限元分析過程 ............................................14
          3.2.1問題及求解域定義 ..........................................14
          3.2.2求解域離散化 ..............................................15
          3.2.3 線，面，體 ............................................... 18
          3.2.4 網格劃分與有限元模型 ..................................... 23
      3.3 Ansys有限元分析結果 ............................................24
總結 ......................................................................25
參考文獻 ..................................................................26
致謝 ......................................................................27

摘      要
 汽車底盤是支承、安裝汽車發動機及其各部件、總成，形成汽車的整體造型，并接受發動機的動力，使汽車產生運動，保證正常行駛的重要汽車部件。隨著車型及數量的不斷增加，載重汽車縱梁總成2004—2006年預計配套量年平均增長60%，社會銷量年平均增長30%左右。近年來，隨著車型的多樣化以及發動機等核心零部件的更新換代等變化，對底盤的要求也越來越多樣化，縱梁的成型工藝要求也就相應增加。隨著我國汽車工業的飛速發展，客戶個性化需求越來越多，各種變形縱梁層出不窮，傳統的加工制造方法已不能滿足上述要求。
 本文針對汽車縱梁的產品工藝性要求，設計其金屬彎曲模。再根據已設計出的模具相關尺寸與強度等數據，建立模型。在不同模擬參數下，如板料彎曲成型的不同厚度、虛擬速度、虛擬質量、節點、單元等，模擬彎曲過程進行起皺與破裂分析，分析計算各設計變量、目標函數、約束條件，最終得出最優彎曲厚度。減少生產中的錯誤，節約生產成本與物料資源，增加生產效率。

關鍵詞：縱梁 彎曲模 設計 有限元分析

Automobile Beam Bending Mold Design

Abstract
 Chassis is an important auto parts,which used in supporting, installation automotive engine and its components, assembly, and forming the overall shape of the car and the engine power acceptable to have a sports car, and ensuring the normal running. With the number of models and increasing truck beam assembly is expected to support the volume of the 2004-2006 average annual growth of 60% average annual sales growth of the community about 30%. In recent years, with the diversification of models, as well as the core engine replacement parts, such as changes in the requirements of the chassis has become increasingly diversified, the beam forming process requirements will increase accordingly. With the rapid development of China's automobile industry, customer demand for personalized, more and more endless variety of beam deformation, the traditional method of processing can not meet those requirements.
 In this paper, automotive products longeron process requirements, design the metal bending modulus. Has been designed in accordance with the mold-related data such as size and strength to build the model. In different simulation parameters, such as forming sheet metal bending with different thickness, the virtual velocity, virtual quality, nodes, modules and simulation of bending process of wrinkling and rupture analysis, analysis of the design variables, objective function, constraints, and ultimately a optimal thickness of the bend. Reduce errors in production, saving production costs and material resources to increase production efficiency.

Keywords:Beam; Automotive beam, Bending die, Design, FEM