我厂在一次冲床操作事故中,造成钢制落料凹模断裂。利用锌基合金冷却收缩率较高的性能,我们将断裂凹模浇上一层锌基合金,修复好了这副报废的模具。具体作法如图示。将凹模断裂处沿着轴向加工出一道剖口,用CO_2保护焊堆焊。堆焊的目的是避免浇注合金时凹模温度升高,使凹模裂纹胀大。浇注合金时,将钢凹模放在平台上,在外围制一个比凹模外径大80毫米的薄板简易熔框,以保证凹模在使用时锌基合金有足 I plant in a punch operation accident, resulting in steel die blanking fracture. The use of zinc-based alloy cooling shrinkage rate higher performance, we will fracture die cast a layer of zinc-based alloy, repair the pair of scrapped mold. Specific practices as shown. The die fracture along the axial processing of a section of the mouth, with CO_2 protective welding surfacing. The purpose of surfacing is to avoid the temperature of the die when casting the alloy, so that the die cracks swell. Pouring the alloy, the steel die on the platform, in the periphery to make a die 80 mm larger than the outer diameter of the simple sheet metal frame to ensure that die in use when the zinc-based alloy foot