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在平面体的板金工划线工作中,除了需要求出展开图外,还必须求出加工成形用的两面角,以便制造卡角样板.因此,求卡样板角度实际上就是在板金工划线工作中求两面角的问题.目前在实际工作中,求展开图和求两面角通常是各自按照投影放样图分别求解.这样,求两面角就往往不得不采用投影变换的方法,而且在一般情况下必须变换两次.实践证明,这种方法作图步骤较多,占地面积太大,不利于提高工效.在制件较大的情况
In the sheet metal work of the plane crossed, in addition to the need to figure out the expansion plans, but also must find out the two sides of the processing and forming angle in order to create the prototype card. Therefore, Work in the two sides of the corner of the problem.Now in actual work, to expand the map and seek the dihedrals are usually in accordance with the projection lofting map were resolved.Thus, the dihedral angle often have to use the projection transformation method, and in general Under the transformation must be twice.Practice has proved that this method mapping steps more, covers an area is too large, is not conducive to improving ergonomics. In the case of larger parts