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Development of Adaptive Control of Deep Drawing Process

拉深过程自适应控制的发展

基本信息

批准号：
01850157
负责人：
MANABE Ken-ichi
金额：
$ 4.1万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B).
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01850157/
关键词：
Sheet Forming Adaptive Control Deep Drawing Variable Blank Holding Force Variable Punch Speed Flange Wrinkles Wall Thickness Distribution Identification of Blank Material Properties 適応制抑超塑性深絞り限界

项目摘要

The purposes of this work are ;(1) to develop an adaptive control machine of high speed deep drawing whose target speed is higher than 500 mm/min taking account of practical use.(2) to develop a new adaptive control method of deep drawing for blank materials with strain hardening and/or strain rate hardening characteristics.The results obtained in this work are as follows.(1) An adaptive control machine of high speed deep drawing is developed. The specification of this machine is that maximum punch speed is 1000 mm/min. and maximum temperature of flange part is 400^ﾟC. This machine is capable of controlling variable blank holding force and variable punch spe ed.(2) Adaptive control method of deep drawing based on variable blank holding force is useful to make cup wall uniform for strain rate dependent materials like superplastic material as well as conventional strain hardening blank materials. For the purpose, the blank holding force should be applied which increases with the drawing process. The cup wall has good surface under such condition.(3) It is shown that adaptive control of deep drawing is capable of tooling of small scale with punch of about 30mm in diameter.(4) A new variable punch speed method to avoid flange wrinkles is proposed for strain rate sensitive materials. This method is useful to high speed production.(5) It is pointed out that highly precise identifications of anisotropy (r-value) and strain rate sensitive index (m-value) of blank materials using in-process measurement are required in order to perform the adaptive deep drawing.

本课题的研究目的是：（1）从实际应用出发，研制一台目标速度大于500 mm/min的高速拉深自适应控制机床。(2)研究了具有应变硬化和应变速率硬化特性的板料拉深成形的自适应控制方法。(1)研制了一种自适应控制的高速拉深机。本机的规格为最大冲压速度为1000 mm/min，法兰件最高温度为400 ° C。该机床可实现变压边力控制和变冲头速度控制. (2)基于变压边力的拉深自适应控制方法对于应变率相关材料如超塑性材料和常规应变硬化材料的拉深成形都是有效的。为此，应施加随着拉深过程而增加的压边力。在这种情况下，杯壁具有良好的表面。(3)结果表明，自适应拉深控制可用于直径为30 mm左右的小型模具。(4)针对应变率敏感材料，提出了一种新的变冲裁速度方法来避免法兰起皱。该方法适用于高速生产。(5)为了实现自适应拉深成形，需要对坯料的各向异性（r值）和应变速率敏感指数（m值）进行高精度的在线测量。