大多数毛坯到用螺丝固定的位置，但不同情况下使用不同的方法。
Most blanks are fixed into position with a screw, but different cases use different methods.
利用冲压成形仿真技术预测材料流动和应变分布，先确定成形后商标在零件上的布置，再反推到成形前平板毛坯上的位置。
The stamping simulation technology could predict the material flow and the strain distribution, so the initial mark location and shape could be calculated.
实际应用结果表明，该方法精确地定位了毛坯在机床坐标系中的位置，并改善了毛坯加工余量的分布情况。
The practical result shows that workblank is accurately located in the coordinate of machine tool and the sum of machine allowance is minimum.
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