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1.轴瓦的镗削 为了延长曲轴的使用寿命,有时按“自由”尺寸来磨削曲轴。这时,为了保证轴颈与轴瓦的正常配合间隙,就要根据曲轴轴颈的实际尺寸来镗削轴瓦。另外,在利用旧瓦改制代用时也要镗瓦。轴瓦的镗削,一般在镗瓦机上进行。镗削时应注意以下几点: 1)连杆必须经过检查校正,连杆螺母按规定扭矩拧紧,轴瓦应紧紧地贴合在座孔内。 2)连杆轴瓦必须与机体主轴同轴。其偏差不应大于0.02mm,这样可保证轴瓦合金厚度一致,以及连杆两个座孔中心线的距离。
1. Bearing boring In order to extend the service life of the crankshaft, sometimes by “free” size to grinding the crankshaft. At this time, in order to ensure the normal journal and bush with the gap, it is necessary according to the actual size of crankshaft journal boring bearings. In addition, in the use of the old tile remodeling substitution should also boring tile. Bearing boring, boring machine is generally carried out on the machine. Boring should pay attention to the following points: 1) connecting rod must be checked and corrected, connecting rod nut tightened to the required torque, bearing bush should fit tightly in the seat hole. 2) Connecting rod bearing must be coaxial with the body shaft. The deviation should not be greater than 0.02mm, so as to ensure the thickness of the alloy bearing pad, as well as the connecting rod two seat hole centerline distance.