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近年来,苏联某些修理企业开始利用铁磁焊料宽纹堆焊法修复发动机曲轴的磨损轴颈。这一方法具有某些优点:提高焊接效率、改善焊接金属质量、延长修复曲轴和发动机修理后的使用寿命。但是,在这种修复方法中发现,焊接修复的曲轴在长度方向上产生变形(即曲轴缩短)。特别是采用宽纹堆焊法修复的—53型发动机铸铁曲轴的变形非常大,在生产条件下堆焊时,曲轴缩短2.8—3.2mm,有时更多。常常会遇到这种情况,由于修复的曲轴缩短太大而无法装入缸体内。宽纹堆焊修复曲轴的变形具有很大的拉伸应力,导致曲轴疲劳强度严重下降。所有这些限制了这一方法的广泛
In recent years, some repair companies in the Soviet Union began to use the ferromagnetic solder widening surfacing method to repair the engine crankshaft wear journal. This method has certain advantages: improving the welding efficiency, improving the quality of the weld metal, and extending the service life of repaired crankshafts and engine repairs. However, it has been found in this repair method that the welded repaired crankshafts deform in the lengthwise direction (ie, the crankshafts are shortened). In particular, the use of wide line surfacing repair -53 engine cast iron crankshaft deformation is very large, under the conditions of production welding, the crankshaft shortened 2.8-3.2mm, and sometimes more. This is often the case, because the repaired crankshaft is too short to fit into the cylinder. Wide grain surfacing welding repair crankshaft deformation has a large tensile stress, resulting in a serious decline in fatigue strength crankshaft. All of this limits the breadth of this approach