为了保证螺栓的连接质量,气扳机对螺栓的拧紧扭矩必须进行定扭矩控制。为此人们想了很多控制气扳机输出扭矩的方法,如美国、英国、意大利等国采用了在气扳机扭矩输出轴上安装一个电控换能器,将气扳机的输出扭矩转换成电信号加以控制;瑞典Atlas Copco公司采用扭矩反作用阀控制组 In order to ensure the quality of the bolt connection, the pneumatic trigger must tighten the torque of the bolt. To this end, many people think of the method of controlling the output torque of the gas trigger. For example, the United States, Britain, Italy and other countries adopted a method of installing an electronically controlled transducer on the gas trigger torque output shaft to convert the output torque of the gas trigger into an electric signal Control; Swedish Atlas Copco companies use torque reaction valve control group