连杆是柴油机的重要部件,是连接活塞与曲轴的连接件,主要由小头、杆身和大头三部分组成。小头与活塞一起做往复直线运动,把作用在活塞顶端面的气体燃烧产生的压力传递给曲轴,使活塞的往复运动变为曲轴的回转运动。连杆在工作过程中,受到压缩拉伸、弯曲和冲击交变载荷的作用,要求其具有足够的刚 Connecting rod is an important part of the diesel engine, connecting the piston and the crankshaft connection, mainly by the small head, shaft and bulk of three parts. The small head makes reciprocating linear motion with the piston, and transmits the pressure generated by the combustion of the gas acting on the top surface of the piston to the crankshaft, so that the reciprocating motion of the piston becomes the rotational motion of the crankshaft. Connecting rod in the work process, subject to compression tensile, bending and impact alternating load role, requiring it to have just