各种内燃机内的活塞将承受的巨大压力经连杆传递给曲轴,并使曲轴作高速旋转运动,曲轴大都采用碳素钢或合金钢锻造成形。为了提高耐磨性,曲轴各曲颈表面都进行了相应的表面处理。为了向各轴颈提供润滑油,在曲轴上还钻有油道及出油孔。在内燃机的各种零部件中,曲轴的加工精度及表面粗糙度要求最高。内燃机在工作时必须吸进混合气及 A variety of internal combustion engine piston will withstand the enormous pressure transmitted to the crankshaft through the connecting rod, and the crankshaft for high-speed rotary motion, the crankshaft mostly carbon steel or alloy steel forging shape. In order to improve the wear resistance, crankshaft surface of each song have been the corresponding surface treatment. In order to provide lubricants to the journal, the crankshaft also drill oil and oil holes. In various internal combustion engine parts, crankshaft machining accuracy and surface roughness of the highest requirements. The internal combustion engine must suck into the mixture at work