An electric constant torque wrench control device, wrench and control method

Abstract

The disclosure provides an electric constant torque wrench control device, a wrench and a control method, including a processor module, a DC motor, an H-bridge drive module and a current sensing module, the current sensing module is respectively connected to the DC motor and the processor, and is used to Collect the current of the DC motor in real time and transmit it to the processor; the processor module is connected to the DC motor through the H-bridge drive module, and is used to realize the speed, direction and direction of the DC motor according to the preset speed, torque and received motor current. Adaptive control of torque; realizes precise control of torque during bolt tightening, especially the accuracy of small torque tightening, expands the scope of application, and realizes full-process recording, display and display of various working conditions and tightening times Quality control traceability to prevent missing bolts. By uploading the recorded torque data to other electronic devices in real time, it is convenient for quality control personnel to monitor the bolt fastening quality in areas that cannot be reached in real time, and greatly improve the quality control ability of the wrench.

Description

technical field [0001] The present disclosure relates to the technical field of electric tool thread assembly, in particular to an electric constant torque wrench control device, wrench and control method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] In the construction of high-strength bolts in steel structures such as bridges, railways, and factory buildings, it is necessary to ensure that all high-strength bolt connections can reach the design pre-tightening force specified in the design specifications. Constant torque electric wrench (hereinafter referred to as tool) is widely used. The main features are: generally composed of double-insulated single-phase series motor, mechanical deceleration mechanism, and controller, using 220V AC power supply as the working power supply, according to the linearity of current and torque. Relat...

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Problems solved by technology

[0004] The inventors of the present disclosure found in the research that: (1) the traditional electric constant torque wrench is limited by the AC power supply, so it is difficult to apply to some high-altitude places such as power towers and communication towers, where AC power cannot be obtained in the field; (2) the traditional electric constant torque wrench Due to the influence of motor performance and control system, the electric constant torque wrench has a narrow torque range. For example, the torque control range of commonly used wrenches is divided into: (300-600N.M Newton.meter), (400-1000N.M) , (700-1500N.M), (1000-2000N.M) and other models, a variety of tools need to be equipped during construction; this is because the size and torque accuracy of traditional tools cannot take into account each other, the root of the problem is due to the motor and mechanical deceleration part Inertia overshoot, can not guarantee the accuracy of small torque, thus limiting the versatility of the tool; (3) In the field construction, the missing screw of the bolt is a more prominent problem, which will bring disadvantages to the quality of the steel structure construction It has become an urgent need to increase data recording, storage and transmission in the construction process; (4) Traditional wrenches generally use simple LED light-emitting tubes as working status indicators, and the amount of information is too small to be intuitive, so it should be improved

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