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螺栓组联接实验是机械设计课程所开设的重要实验之一。该实验中杠杆加载系统自重折算的载荷及螺栓所需的预紧力是本实验首先要确定的重要参数。本文介绍一种操作简单行之有效的螺栓组联接实验杠杆加载系统自重折算载荷的计算方法以及螺栓所需预紧力的确定方法， 并举例加以说明。
Bolt grouping experiment is one of the important experiments in mechanical design course. In this experiment, the weight of the lever loading system and the preload force required by the bolt are the important parameters to be determined in this experiment. In this paper, a simple and effective method for calculating the self-contained bending load of the bolt assembly experiment and the method for determining the preload of the bolt are given. An example is given to illustrate the method.