Torque rotating angle multi-dimensional sensing control device and control method for electric wrench

Abstract

The invention provides a torque rotating angle multi-dimensional sensing control device and control method for an electric wrench and a wrench. The torque rotating angle multi-dimensional sensing control device comprises a processor module, a brushless direct current motor, a servo control module and a current sensing module; the current sensing module is corrrespondingly connected with the brushless direct current motor and the processor module and is used for acquiring the current of the brushless direct current motor in real time and transmitting the current to the processor module; the processor module is in communication connection with the brushless direct current motor through the servo control module, the processor module is used for realizing the self-adaptive control of the rotation speed, the direction, the rotation angle and torque of the brushless direct-current motor, and realizing the control of fixed torque and / or the perception of the torque and the rotation angle during fixed-angle control, accurate control of the fixed torque and the fixed angle is realized, data processing is carried out by adopting a statistical principle, so that the quality control capabilityof the wrench is greatly improved.

Description

technical field [0001] The present disclosure relates to the technical field of screw assembly of electric tools, and in particular to a torque rotation angle multi-dimensional sensing control device, wrench and method for an electric wrench. 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] For the construction of steel structures such as modern bridges, high-strength bolt groups are generally used to connect different steel structures. By tightening the high-strength bolts, the high-strength bolt shaft has a large tightening pre-tension (axial force), and the axial force is multiplied by The friction coefficient between the connecting plates produces huge friction to connect the steel structures together. [0004] During the construction process, electric constant torque wrench is mostly used for bolt tightening, which is carried out in...

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Problems solved by technology

[0005] The inventors of the present disclosure found in the research that (1) when the current traditional constant torque wrench performs the final torsion operation, no matter whether it uses the constant torque process or the fixed rotation angle process, it only controls the single link of the torque or the rotation angle, and does not control the " The final torsion angle in the "constant torque" process; or the final torsional torque in the "constant rotation angle" process is multi-dimensionally measured, so the distribution of the "torque-angle coefficient" of the final torsion during construction cannot be known. For the construction of the bolt group, the construction The process control is not fine enough, and the quality defects of the bolts cannot be found in time during the construction, leaving quality hidden dangers in the construction, which is not conducive to the improvement of the construction quality; (2) The traditional constant torque wrench generally uses a brushed series motor, or has Brush DC permanent magnet motor, due to the existence of the commutator, the motor has spark interference, which is not conducive to the improvement of the life of tools such as wrenches. At the same time, it is not easy to achieve high precision, and the high precision of control and measurement perception cannot be guaranteed.

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