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众所周知,在使用缓冲器的拉延中,随着拉延深度增加,压边力也增加,尤其是采用橡皮缓冲器,压边力增加更剧烈。为了防止因压边力过大而引起拉型零件,通常在拉延模上装有控隙柱。第二次及其以后各次拉延的控隙柱的工作情况如图1所示。它保证凹模圆角与压边圈圆角之间有合理的保持不变的间隙。以往,对控隙柱的高度一般不进行详细的计算,而只是根据工作图给一大概尺寸,然后加注;“调整控隙螺钉,保证间隙Z”。因Z测量不便,对于无导柱导套的拉延模,测量调整就更困难。因此有必要准
As we all know, in the use of the buffer drawing, with the drawing depth increases, the blank holder force also increases, especially the use of rubber buffer, blank holder force increased more intense. In order to prevent over-stress caused by the tension-type parts, drawing die is usually equipped with a control column. The second and subsequent drawing of the work of the control column shown in Figure 1. It ensures a reasonable gap between the die fillet and the blank holder fillet. In the past, the height of the control column generally do not carry out a detailed calculation, but only according to the working drawings to give a rough size, and then filling; “Adjusting gap control screw to ensure clearance Z”. Due to the inconvenience of Z measurement, the measurement adjustment is even more difficult for the die without guide bush. Therefore, it is necessary