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首页> 外文期刊>The International Journal of Advanced Manufacturing Technology >An automated progressive process planning and die design and working system for blanking or piercing and bending of a sheet metal product
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An automated progressive process planning and die design and working system for blanking or piercing and bending of a sheet metal product

机译：用于钣金产品的落料或冲孔和弯曲的自动化渐进式工艺计划以及模具设计和工作系统

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This paper describes the development of a computer-aided design and manufacturing system for irregular-shaped sheet metal products for blanking or piercing and bending operations. The approach is based on knowledge-based rules. Knowledge for thesystem is formulated from plasticity theories, experimental results and the empirical knowledge of field experts. This program for the system has been written in AutoLISP using AutoCAD and on SmartCAM using a personal computer and is composed of ninemodules, which are input as shape treatment, flat pattern-layout, production feasibility check, blank-layout, strip-layout, die-layout, data-conversion, modeling, and post-processor modules. Based on knowledge-based rules, the system is designed byconsidering several factors, such as material and thickness of product, complexities of blank geometry and punch profile, diameter and material of a wire, and the availability of a press. This system is capable of unfolding formed sheet metal to give aflat pattern and automatically accounts for the adjustment of bending allowances to match tooling requirements by checking dimensions and generating NC data automatically according to the drawings of the die-layout module. Results obtained using themodules enable the designer and manufacturer of blanking or piercing and bending dies to be more efficient in this field.
机译：本文描述了一种用于不规则形状的钣金产品的计算机辅助设计和制造系统的开发，该产品用于落料或穿孔和弯曲操作。该方法基于基于知识的规则。该系统的知识由可塑性理论，实验结果和现场专家的经验知识组成。该系统程序已使用AutoCAD在AutoLISP中编写，并使用个人计算机在SmartCAM中编写，并且由九个模块组成，这些模块作为形状处理，平面图案布局，生产可行性检查，毛坯布局，带材布局，模具输入。布局，数据转换，建模和后处理器模块。系统基于知识规则，通过考虑多个因素来设计该系统，例如产品的材料和厚度，毛坯几何形状和冲头轮廓的复杂性，线材的直径和材料以及压机的可用性。该系统能够展开成型的钣金以提供平坦的图案，并根据模具布局模块的图纸自动检查尺寸并自动生成NC数据，从而自动考虑弯曲余量的调整以符合模具要求。使用模块获得的结果使落料或冲孔和弯曲模具的设计者和制造商在该领域更加有效。

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