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大型液压机发生故障通常是由于工作缸中出现裂纹引起的。金属组织的缺陷和结构上的缺点引起应力集中,导致液压缸的疲劳破坏。用电弧焊方法修复液压缸已得到普遍推广。本文介绍了某冶金厂采用焊接与局部改变缸体结构相结合的方法来修复大型液压缸的经验。重42吨的立式模锻液压机的铸造缸(化学成份见表),在液体压力为300公斤力/厘米~2
Large hydraulic machine failure is usually due to cracks in the cylinder caused. Metallic tissue defects and structural shortcomings cause stress concentration, resulting in fatigue damage to the hydraulic cylinder. The arc welding method to repair the hydraulic cylinder has been widely promoted. This article describes the experience of a metallurgical plant repairing a large hydraulic cylinder by a combination of welding and partially changing the cylinder structure. Heavy 42 tons of vertical forging hydraulic casting cylinder (chemical composition table), the liquid pressure of 300 kg force / cm ~ 2