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我厂铸造车间的碾轮式混砂机使用普通钢板或铸铁的刮板,由于磨损快或易断裂,以致于使用寿命短,经常更换。后来我们利用潜孔钻废旧钎头上的硬质合金片,把它镶焊在普通钢板刮板的边缘,取得了良好的使用效果。一、刮板的制作工艺首先,用20mm厚的钢板按尺寸割出内、外刮板坯。在易磨损的部位(刮板边缘)刨出镶焊合金片的凹槽。如图所示。槽的尺寸由台金片大小来定。再将其卷成必要的弧度。最后,铜焊。合金片平整的一边放在边缘,要求平直。每块合金片之间不留或稍留间隙。铜焊在间隙间。安装时,外刮板下部拐角处倒角,以便和混砂机底板上的圆角配合。二、使用效果 (1)寿命显著提高。普通钢板或铸铁的刮板只能用3～4周,而镶焊合金片的刮板一次安装可使用4～5个月,调整后还可重新使用。
I plant casting workshop roller mill using ordinary steel or cast iron scraper, due to wear fast or easy to break, resulting in a short service life, often changed. Later, we use the DTH drill waste carbide head on the chip, it is inlaid in the ordinary steel scraper edge, and achieved good results. First, the scraper of the production process First of all, with 20mm thick steel cut according to size, the outer scraper blanks. In the easy-to-wear parts (scraper edge) dug the groove of the inlaid alloy sheet. as the picture shows. The size of the groove set by the size of gold sheet. Then roll it into the necessary arc. Finally, brazing. Alloy flat on the side of the edge, requiring flat. Each piece of alloy without or slightly left between the gap. Brazing in the gap. During installation, the lower part of the outer scraper is chamfered at the corner to match with the fillet on the bottom of the mixer. Second, the use of results (1) life expectancy increased significantly. Ordinary steel or cast iron scraper can only be used for 3 to 4 weeks, while the inlay alloy scraper plate installed once can be used 4 to 5 months, after adjustment can be reused.