东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (4): 574-578.DOI: 10.12068/j.issn.1005-3026.2014.04.027

• 机械工程 • 上一篇    下一篇

裂解连杆断裂面三维重构与缺损尺寸分析

寇淑清1，杨宏宇1，赵勇1，杨慎华2   

  1. (1 吉林大学 材料科学与工程学院， 吉林 长春130022； 2 长春吉扬华欣科技有限责任公司， 吉林 长春130103)
  • 收稿日期:2013-09-03 修回日期:2013-09-03 出版日期:2014-04-15 发布日期:2013-11-22
  • 通讯作者: 寇淑清
  • 作者简介:寇淑清(1962-)，女，黑龙江肇源人，吉林大学教授，博士生导师.
  • 基金资助:
    国际科技合作计划项目(2011DFR70350)；科技重大专项(2013ZX04002-021).

3D Reconstruction and Defect Dimension Analysis of Fracture Surface for Fracture Splitting Connecting Rods

KOU Shuqing1， YANG Hongyu1， ZHAO Yong1， YANG Shenhua2   

  1. 1. College of Materials Science and Engineering， Jilin University， Changchun 130022， China; 2. Changchun Jiyanghuaxin Technology Co. Ltd.， Changchun 130103， China.
  • Received:2013-09-03 Revised:2013-09-03 Online:2014-04-15 Published:2013-11-22
  • Contact: YANG HongYu
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摘要： 基于TIN(不规则三角网)重构原理，借助图像处理及逆向工程技术自主开发裂解连杆断裂结合面三维重构软件，再现断裂结合面形貌并计算其真实表面积，据此规范裂解连杆断裂结合面面积缺损许可范围，并计算和分析裂解连杆断裂结合面的表面粗糙度RS及轮廓线粗糙度RL.结果表明，裂解加工某轿车C70S6连杆断裂面相对机加工平面面积增加了130%以上，在不降低承载能力和使用性能的前提下，其颗粒脱落极限尺寸许可值可较经验值大大提高；RS与RL存在线性关系，建立了二者间的数学模型，简化了裂解连杆断裂结合面真实面积的计算过程，方便裂解连杆面积缺损控制标准的制定.

关键词: 连杆, 裂解, 断裂面重构, 粗糙度, 面积缺损

Abstract: Based on the triangle irregular net(TIN) reconstruction theory， a 3D software about the fracture surface reconstruction of connecting rods was developed by combining the image processing with the reverse engineering technique， which realized the morphology reproduction of the fracture surface and the calculation of the real surface area. Then the permit range of the area defect of the fracture surface for the fracture splitting connecting rods was determined， and the surface roughness (RS) and line roughness (RL) of the fracture surface were calculated and analyzed. The results showed that the fracture surface area of C70S6 connecting rods in a car produced by the fracture splitting method was 130% larger than that produced by the machining method. It represented that the tolerance range of fracture surface defect dimension was improved compared to the empirical value without reducing the carrying capacity and usability. Furthermore， the relationship between RS and RL was linear， and the mathematical model of these two was established which simplified the calculation procedure of the true area of the interaction surface of the fracture splitting connecting rods， and was beneficial for quantitatively describing the fracture surface.

Key words: connecting rod, fracture splitting, fracture surface reconstruction, roughness, area defect

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