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一、前言连秆是发动机的主要运动件之一.它的几何形状复杂,受力情况更复杂。为确保其使用性能,降低成本,国内外各厂家对它的设计、加工、试验研究等历来都是分外重视的。然而由于其特殊的工况所造成的受力复杂性,使得对它的试验研究受到一定限制。据文献介绍,若将其受力情况加以简化,籍助于专用夹具,以刚性连接的形式,在Amsler高频疲劳试验机上进行交变拉压疲劳试验,所得到的试验结果可以预报在发动机上工作的可靠性,可作为研究连杆疲劳强度的方法之一。锻造并经热处理后的连杆毛坯,在冷
I. INTRODUCTION Even the culm is one of the main moving parts of the engine, its geometry is complicated and its force situation is more complicated. In order to ensure its performance and reduce costs, all domestic and foreign manufacturers have always attached great importance to its design, processing and experimental research. However, due to its special conditions caused by the complexity of the force, making its experimental study subject to certain restrictions. According to the literature, if its force situation is simplified, thanks to special fixtures, in the form of rigid connections in the Amsler high-frequency fatigue testing machine alternating tension and compression fatigue test, the test results obtained can be predicted on the engine The reliability of work can be used as one of the methods to study the fatigue strength of connecting rod. Forged and heat treated rod stock, cold