连杆是内燃机中主要零件之一 每逢引擎发生故障须经大修或中修时,它几乎是必然修理的部分。连杆小头磨损时只需更换铜套即可,而其大头磨损则需更换附着在轴瓦上的巴氏合金,重行浇注合金后再作孔加工。我们过去加工这个零件的内孔时,都是采用四爪卡盘夹持在车床上车削。但因受车 The connecting rod is one of the main components of an internal combustion engine. It is almost an inevitable repair whenever an engine failure is overhauled or repaired. Connecting rod small head wear only need to replace the copper sleeve, and its bulk wear need to replace the attachment of the bearing on the Babbitt alloy, re-cast the alloy and then hole processing. We used to process this part of the inner hole, are used four-jaw chuck clamping lathe turning. But because of the car