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上擋(自行車前岔上擋)其产品規格如图1,材料为15号鋼材。原加工工艺是用7毫米厚的鋼板进行加工的,其工序是下料一冲孔、燒紅翻边(图2)后进行切削加工。这样不但质量低、劳动条件坏更严重的是浪費鋼材和模子寿命短(翻边模消耗的更快些)。在以技术革新为中心的增产节約运动中,我們采用了冶体积成形冲压工艺来代替切削加工和热压。其工艺过程如下:
On the block (bicycle front fork on the block) the product specifications shown in Figure 1, the material is 15 steel. The original processing technology is the use of 7 mm thick steel plate for processing, the process is cutting a punching, burned red flanging (Figure 2) after cutting. This not only low quality, worse working conditions is a waste of steel and mold life is short (flanging die consumption faster). In the technological innovation as the center of the campaign to increase production and conservation, we adopted the rule of volume forming stamping process instead of cutting and pressing. The process is as follows: