摘要
在板材数控渐进成形中，为满足节省材料、降低成形加工载荷的要求，提出了基于STL（sterolithography）模型的数控渐进成形板料尺寸自动确定方法。利用板材件底面边界多边形的最小矩形包围盒确定了板料的长、宽；根据板材件厚度的正弦减薄规律确定了板料的厚度，并生成了板材件厚度分布颜色云图。通过对不同形状的板材件比较分析表明，本方法较传统方法能够节省板料9．4％～23．5％。基于有限元分析的数字模拟结果表明，采用本方法确定的板料尺寸完全可以加工成形出预期的板材件。
To meet the needs of saving materials and reducing the forming load in sheet metal computer numerical con- trol （CNC） incremental forming, a method of automatically determining the size of the sheet metal based on STL （Ste- rolithography） model was proposed. The length and width of the sheet metal was determined by using the minimum ar- ea bounding rectangle of the undersurface polygon of the sheet metal part. The sheet thickness was determined accord- ing to the sine law of sheet thinning, and the color cloud picture of the sheet thickness distribution was generated. The sheet metal determined by this means was saved 9.4% to 23.5% than by the traditional one. The results of the numer- ical simulation based on the finite element analysis demonstrate that the sheet metal size determined by this method can be formed into the expected sheet metal.
出处
《锻压技术》
CAS
CSCD
北大核心
2013年第6期32-36,共5页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(51175351)
关键词
板材成形
数控渐进成形
STL模型
sheet metal forming
CNC incremental forming
STL model
