我厂250马力液化气槽车在行驶过程中,由于6~#缸联杆螺栓松动,造成联杆瓦飞出,半缸体击出三个洞和两条裂纹(见右图).经研究决定采用钎焊将其修复.1 焊前准备①将撞坏的洞用风动砂轮修整成圆形并磨出坡口;②按圆洞尺寸割出三块钢质补板,并加工坡口; The 250 horsepower liquefied gas tanker of our factory was driven by the loosening of the bolt of 6 ~ # cylinder connecting rod, resulting in the flying out of the connecting rod tile, the three holes and two cracks hit by the half cylinder block (see the picture on the right) Decided to use brazing to repair.1 welding preparation ① the crashed hole with a pneumatic wheel trimmed into a circular and grind out of the groove; ② according to the hole size cut out three steel plate, and processing groove ;