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以前,我厂生产的195主轴承止推边半成品是在冲床上用板料落成圆料而成。这种工艺材料利用率低,成本高,很不经济。以后,我们改进了工艺,在冲床上把板料剪成条料经卷圆等工序生产止推边。这种工艺大大提高了材料利用率,降低了生产成本,但卷圆后的止推边存在着两方面的缺陷:其一、OA是直线,不是圆弧;其二、钢背上E面低于F面约0.35mm（图1）。我们习惯上称E处为“塌陷”。用这样的上推边半成品直接与筒体摩擦焊接时,E处就会发生透光现象,焊后达不到产品图的技术要求。
In the past, I produced 195 spindle thrusting semi-finished products are formed on the punch with a round sheet made of sheet metal. This process material utilization is low, high cost, very uneconomical. Later, we improved the process, in the press cut the sheet material into a strip through the rolling process such as the production of thrust edge. This process greatly improves the utilization of materials and reduce the cost of production, but there are two flaws in the curling edge after rolling: First, OA is a straight line, not arc; Second, the steel back E surface is low About 0.35mm on the F surface (Figure 1). We used to call E Department “collapse.” With such a push on the edge of the semi-finished products directly friction welding with the cylinder, E will happen at the phenomenon of light transmission, welding products reach the technical requirements.