活塞是小松压力机平衡缸上的一个重要部件,根据设计要求,需要在圆周面上一定范围内堆焊一层铜。过去我们采用手工电弧焊工艺用铜焊条进行焊接,经试焊发现不但生产效率低,而且质量很差,容易出现夹渣、气孔和未熔合等缺陷,经常造成成批返修。为此,我们经反复实践,决定采用气体保护焊工艺。 实践证明,采用新工艺不但提高了生产效率和 Piston is Komatsu press balancing cylinder on an important component, according to the design requirements, the need to surfacing in a certain area on the circumference of a layer of copper. In the past we used manual arc welding process using copper welding electrode, the trial welding found not only low production efficiency, but also poor quality, prone to slag inclusions, porosity and unfused defects, often resulting in batch repair. To this end, we have repeatedly practiced and decided to adopt the gas shielded welding process. Practice has proved that the use of new technology not only improves production efficiency and