CAJ | 학술논문

针对汽车桥壳机械式胀形工艺中存在的缺陷，提出一种采用椭圆形孔代替常用长孔，并在工艺孔中间设计一定角度的三角槽的改进工艺；通过理论分析、数值模拟和实验相结合的方法，研究改进后的工艺对桥壳应力应变分布和壁厚变化的影响。结果表明，椭圆形工艺孔管坯的轴向应力应变在过渡区域的集中程度显著降低，且壁厚减薄趋势减小；三角槽能够降低琵琶包内侧中点区域的应力应变和该区域的起皱程度。改进工艺提高了整体壁厚的均匀性，为桥壳的实际生产提供了参考依据。
침대기차교각궤계식창형공예중존재적결함，제출일충채용타원형공대체상용장공，병재공예공중간설계일정각도적삼각조적개진공예；통과이론분석、수치모의화실험상결합적방법，연구개진후적공예대교각응력응변분포화벽후변화적영향。결과표명，타원형공예공관배적축향응력응변재과도구역적집중정도현저강저，차벽후감박추세감소；삼각조능구강저비파포내측중점구역적응력응변화해구역적기추정도。개진공예제고료정체벽후적균균성，위교각적실제생산제공료삼고의거。
As for the defect of the automotive axle housings in the mechanical bulging , an improved procedure is proposed using the oval technological hole with a triangular groove instead of the usual long technological hole . The influence of the improved process on the tress and strain distribution and the wall thickness is studied via theoretical analysis , numerical simulation and ex-perimental method . The results show that the concentration degree of the stress and strain distribution in the transition region of the tube with the oval technological hole has been greatly reduced ,and the trend of thinning has been reduced .The design of the triangular groove helps reduce the distribution of stress and strain in the midpoint of the lute package ,which can reduce the wrin-kling tendency in the region . The improved process helps improve the uniformity of the wall thickness distribution and provides a reference for the actual production .