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发动机在其特定的运行工况下,缸体通常有可能产生两种形式的失效,即气缸壁的磨损和由于材料疲劳累积损伤导致的失效。发动机经过再制造后,对此两种损伤进行性能分析得知:磨损导致的损伤,经过再制造切削加工后,配合新的尺寸零件,保证原有的公差配合,损伤完全可以消除;疲劳累积引起的损伤,即使采用镗铣、磨削等机加工手段消除了表面裂纹,损伤并没有得到修复,其性能和安全性可能仍然存在问题。
Engine under its specific operating conditions, the cylinder usually have the potential to produce two forms of failure, that is, the cylinder wall wear and fatigue due to accumulated damage caused by material failure. Engine after remanufacturing, performance analysis of these two injuries that: wear damage, after remanufacturing cutting, with the new size of the parts, to ensure that the original tolerance fit, the damage can be completely eliminated; cumulative fatigue caused Of the damage, even if the use of boring milling, grinding and other machining methods to eliminate surface cracks, damage has not been repaired, its performance and safety may still exist problems.