汽车防撞横梁冲压工艺开发与模具设计

发布时间：2018-07-07 17:11

本文选题：冲压工艺 + CAE分析　；参考：《天津理工大学》2017年硕士论文

【摘要】：近年来,汽车覆盖件的生产过程得到了越来越多的关注,基于CAE技术的汽车覆盖件冲压成形也被大量研究。汽车后防撞横梁作为汽车覆盖件的一种,它是汽车的一种保护装备,目前也得到越来越多的重视。本文通过CAE模拟分析技术,对汽车防撞横梁进行工艺开发与模具设计,旨在节约防撞横梁冲压设计时间,提高防撞横梁制件的质量。本文对汽车防撞横梁进行冲压工艺性分析,结合冲压工艺性分析的结果,对防撞横梁进行冲压工艺的设计。汽车防撞横梁冲压工艺方案是:第一序为拉深工序,第二序为修边侧修边冲孔工序,第三序为修边侧修边工序,第四序为整形工序。对以上四个工序分别进行工序件设计和工艺设计。然后基于数值模拟软件Dynaform,针对汽车防撞横梁的拉深过程,进行了有限元冲压工艺模拟,得出的模拟结果是起皱现象严重。因此针对防撞梁起皱缺陷进行了工艺优化,采取变压边力和变凹模圆角半径的方案,并且借助Dynaform分析软件对优化方案进行了验证。最后利用UG软件对汽车防撞横梁进行冲压模具设计,主要是拉深模具和修边冲孔模具的设计。把防撞横梁冲压成形工艺设计作为主线,以各个类型模具结构设计标准为依据,对防撞横梁冲压模具进行总体设计。拉深模具的设计要点与设计过程,主要包括凸模设计、凹模设计、起吊装置设计、定位装置设计和加工基准孔设计等。修边冲孔模具的设计要点与设计过程,主要包括废料刀设计、镶块设计、冲头设计、废料滑槽设计和导向装置设计等。通过现场试模,验证汽车防撞横梁冲压成形工艺开发与模具设计是否合理。事实表明:基于CAE技术的防撞横梁冲压工艺开发和模具设计是可行的。对制件分析了缺陷产生的原因。模拟分析结果指导实际生产,模拟优化的方案防止了缺陷的产生,得到了合格的成品件。用三坐标测量仪对制件进行测量,并与模拟结果进行了对比验证,结论是模拟分析的结果与实际测量结果一致,模拟仿真技术确实起到了指导现场生产的作用。
[Abstract]:In recent years, more and more attention has been paid to the production process of automobile panels, and the stamping forming of automobile panels based on CAE technology has also been studied. As a kind of automobile panel, rear collision-resistant crossbar is a kind of protective equipment of automobile, which is paid more and more attention to at present. In this paper, the process and die design of automobile anti-collision crossbeam are carried out by CAE simulation and analysis technology. The purpose of this paper is to save the stamping design time of the anti-collision crossbeam and to improve the quality of the workpiece of anti-collision crossbeam. In this paper, the punching technology of automobile anti-collision crossbeam is analyzed, and the punching process is designed based on the result of punching technology analysis. The stamping process scheme of automobile anti-collision crossbeam is as follows: the first order is drawing procedure, the second order is edge trimming process, the third order is edge trimming procedure, the fourth order is shaping procedure. The above four processes are designed for process parts and processes respectively. Then, based on the numerical simulation software Dynaform, the finite element stamping process is simulated for the drawing process of automobile anti-collision crossbeam, and the result is that the wrinkle phenomenon is serious. For the wrinkling defect of crash-proof beam, the process optimization is carried out, and the scheme of variable blank holding force and variable die radius is adopted, and the optimized scheme is verified by Dynaform analysis software. Finally, the punching die design of automobile anti-collision crossbeam is carried out by UG software, mainly the design of drawing die and trimming punching die. Taking the stamping forming process design of collision crossbeam as the main line, and based on the design standard of various types of die structure, the general design of stamping die for collision crossbeam is carried out. The key points and design process of drawing die include punch design, concave die design, hoisting device design, positioning device design and machining reference hole design etc. The main design points and design process of trimming punching die include scrap knife design, insert design, punch design, waste chute design and guide device design, etc. The stamping process development and die design of automobile anti-collision crossbeam are verified by field die test. The fact shows that it is feasible to develop the punching technology and die design of the collision-proof crossbeam based on CAE technology. The causes of defects are analyzed. The result of simulation analysis can guide the actual production, and the scheme of simulation and optimization can prevent the defect and get the qualified finished product. The 3D coordinate measuring instrument is used to measure the parts, and the results are compared with the simulation results. The conclusion is that the results of the simulation analysis are in agreement with the actual measurement results, and the simulation and simulation technology does play a role in guiding the field production.
【学位授予单位】：天津理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U466;TG38

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