一种螺栓连接后实际扭矩检测方法

2021-02-17 22:50:52王国平高明张国旺
装备维修技术 2021年41期

王国平 高明 张国旺

摘 要:目前车辆在行驶一段时间以后,车体的紧固件需要复检一次。目前检测的方式为增拧法,但是太考验检测者的经验积累,增拧的角度很难做到一个统一的标准,这就导致检测的误差比较大,很难准确的检测出已连接紧固件的真实扭矩值。同时数据的记录也是手动记录法,大大的降低了检测效率。为了解决现有技术的不足,设计研发一种螺栓连接后实际扭矩检测的方法,突破了检测过程非常依靠检测经验和操作难度大的现状,实现了科学的检测方法,高精度的角位移检测手段,同时可以自动记录以及生成数据报表。

关键词:扭矩;增拧角;紧固件;扭矩检测

Abstract:At present,the vehicle body fasteners need to be re-checked after a period of time.At present,the method of detection is torsion method,but it is too testing the experience of the tester,and it is difficult to achieve a unified standard of the Angle of screw fixation,which leads to a large error in the detection,and it is difficult to accurately detect the real torque value of the connected fastener.At the same time,data recording is also manual recording,which greatly reduces the detection efficiency.In order to solve the shortage of current technology,a method for testing actual torque after bolt connection is designed and developed,which breaks through the current situation that the testing process relies on the testing experience and the difficulty of operation,and realizes the scientific detection method,the high-precision angular displacement detection method,and can automatically record and generate data reports.

Key words:torque;tightening angle;fastener;torque detection.

1.引言

产品在研发及生产制造过程中,其各零部件之间大多采用螺栓、螺母等连接方式,装配过程中,会根据各零部件之间的具体连接应力推算预紧力,然后选用合适规格的螺栓进行连接,并按照要求施加上合适的力矩。车辆在行驶一段时间以后,车体的紧固件需要复检一次。目前检测的方式为增拧法,但是太考验检测者的经验积累,增拧的角度很难做到一个统一的标准,这就导致检测的误差比较大,很难准确的检测出已连接紧固件的真实扭矩值。同时数据的记录也是手动记录法,大大的降低了检测效率。本文设计的检测方法主要依赖于复合扭矩传感器,可以高精度检测角位移变化和扭矩变化。再配合工控机采集数据、分析数据、处理数据、显示(导出)数据等步骤,可以方便快捷的查看记录检测结果。……

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