热轧厚板件冲压成形与回弹分析

发布时间：2018-03-16 21:48

本文选题：热轧厚板件　切入点：冲压成形　出处：《锻压技术》2017年09期 　论文类型：期刊论文

【摘要】：考虑到热轧厚板的材料力学性能、成形方式和板材精度均与薄板存在一定差异,且常用冲压分析软件无法准确模拟厚板成形与回弹,因此,以某车型纵梁为例,采用Autoform,Dynaform以及MARC进行成形与回弹仿真分析对比,依据分析结果判定何种软件更适合热轧厚板冲压仿真分析。首先,分析厚板成形特点以及与薄板的差异性,梳理出3种软件分析厚板时的差异;其次,通过3种软件对同一纵梁外板进行模拟分析对比。为获得真实可靠的实测值,成形前在板料上利用激光绘制基圆,依据成形后基圆尺寸变化计算主次应变,并选取断面及检测点,测量回弹尺寸与厚度变化,与3种软件分析结果进行对比。结果表明:MARC的实体单元对厚度和主次应变分析最为准确;对于回弹,Dynaform计算更为准确,Autoform和MARC回弹结果均与实测值产生较大偏离。
[Abstract]:Considering the material mechanical properties of thick hot-rolled plate, forming precision sheet and plate and there are certain differences and common stamping analysis software cannot accurately simulate plate forming and springback, therefore, with a vehicle longitudinal beam as an example, using Autoform, comparative analysis and springback simulation are shaped into Dynaform and MARC, according to the analysis results to determine what software more suitable for hot rolling plate stamping simulation analysis. Firstly, the difference analysis of plate forming characteristics and thin plate, the plate difference analysis of 3 kinds of software by combing; secondly, through 3 kinds of software on the same longitudinal beam plate is simulated and analyzed. Compared to obtain reliable measured values before forming on sheet material the use of laser drawing base circle, calculated on the basis of primary and secondary strain base circle size change after forming, and select the section and the detection point, change the size and thickness measurement results of springback, and 3 kinds of analysis software The results show that the solid element of MARC is the most accurate for thickness and primary and secondary strain analysis. For springback, Dynaform calculation is more accurate, and the rebound results of Autoform and MARC deviate greatly from the measured values.

【作者单位】：东风汽车公司技术中心;
【分类号】：TG386.4

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