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在大量生产中冲孔冲头是易损件,为保证生产的正常进行,多采用快换冲头。我们在学习国外经验的基础上,使用了新型快换冲头。图1为汽车纵梁冲孔落料模,件17是快换冲头。该种结构的冲头安装维修方便,不需卸冲模即可更换,而且性能可靠适合冲中、厚板料。缺点是外径尺寸比相同规格凸模固定部分大些,故对于孔的位置尺寸较小,以致使凸模外径尺寸相互干扰的冲我件不适用,薄板料且要求平度高的冲裁件也不适用。另外,机加工也较麻烦。现将快换冲头简介如下:
In a large number of punching punch production is wearing parts, in order to ensure the normal production, the use of quick change punches. We learn the experience of foreign countries, based on the use of a new quick swap punch. Figure 1 for the car stringer punching blanking die, piece 17 is a quick change punch. This structure of the punch installation and maintenance easy, without removing the die can be replaced, and reliable performance for Chong, the plate material. Drawback is that the outer diameter of the punch than the same size part of the fixed part of the larger, so the location of the hole size smaller, so that the outer diameter punch size interference me piece not applicable, the sheet metal and requires a high degree of blanking Not applicable. In addition, machining is more troublesome. Now fast punch punch profile is as follows: