一、前言链板的疲劳失效是链条报废的主要方式;而链板的强化工艺是提高其疲劳性能的有效措施。挤孔则是强化处理的主要方法之一。挤孔强化可大幅度提高其疲劳强度,可在一定程度上弥补滚子链在材质及加工方面的质量缺欠,很好地稳定链条的质量水平,或者在优质链的基础上进一步提高它的承载能力,所以这是一种积极有实用价值的工艺方法。但是,挤孔强化处理方法是一种附加在原有链条加工过度之外的工艺方法,它的实现需要有关的技术和设备为基础,因而势必增加链条原有的生产成 I. Foreword The fatigue failure of the chain plate is the main way of scrapping the chain. The strengthening process of the chain plate is an effective measure to improve its fatigue performance. Squeeze the hole is one of the main methods of strengthening treatment. Crowded hole can greatly enhance the fatigue strength, to a certain extent, make up for the quality of the roller chain in the material and processing defects, a good level of stability of the quality of the chain, or in the high-quality chain to further enhance its carrying capacity Ability, so this is a positive and practical value of the process. However, the extrusion hole strengthening treatment method is an additional process beyond the original chain over-processing, the realization of which requires the relevant technology and equipment as the basis, it is bound to increase the original production chain into