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解放牌汽车气门弹簧座如图1,一般是用车削或厚钢板冲压成型的。我们改用了φ16毫米圆钢温挤成型,大大提高了经济效果(见表)。显然,温挤成型不仅具有工效高、原材料消耗低、设备吨位小的优点,而且由于采用型腔挤压,使产品表面光洁度、机械强度都有所提高。我们使用的工艺流程如图2。 1.截料:截得毛坯料的长度和直径之比H_0/D_0选在1.5～2.5之间。若此值选得过小,则加热后镦粗时因变形程度不大,使坯料圆柱面上的氧化皮爆
Jiefang brand auto valve spring seat shown in Figure 1, is generally formed by turning or thick steel stamping. We use a φ16 mm round steel warm extrusion, greatly improving the economic results (see table). Obviously, the warm extrusion molding not only has the advantages of high efficiency, low consumption of raw materials, small tonnage of equipment, but also because of the use of cavity extrusion, the product surface finish, mechanical strength has increased. We use the process shown in Figure 2. 1. Cuttings: Cut the length of the blank material and the diameter ratio H_0 / D_0 choose between 1.5 to 2.5. If this value is chosen too small, then heated upset due to the degree of deformation is not large, so that the oxide material on the cylindrical surface burst