工农—1100型脱粒机虽然是老机型,但目前保有量仍很大,所以使用好这种机型有现实意义。每年脱粒季节,使用这种脱粒机,在我地区都要发生数次重大的人身设备事故,究其原因,绝大部分多是由纹杆螺栓所引起的。纹杆螺栓不同于一般联接螺栓,它在工作中受到高速、高频和冲击性的拉伸、剪切和弯曲 Although the worker-peasant -1100 thresher is an old machine, the current holding capacity is still very large, so it is of practical significance to use this type of machine. Threshing season every year, the use of this thresher, in my area have to happen several major personal equipment accidents, the reason most of them are caused by the rod bolt. Unlike standard coupling bolts, shank bolts are subjected to high-speed, high-frequency and impact tensile, shear and bending work