A dynamic tension control method in the variable-speed unwinding process of a basket-type rope forming machine
A technology of tension control and rope formation, which is applied in auxiliary devices for rope making, textiles and papermaking, and textile cables, etc. It can solve the problem of not involving the precise control method of rope strand tension, the inability to eliminate excessive tension deviation, and difficulty in ensuring strand rope Stability of tension and other issues to achieve the effect of improving the tension control accuracy of strand rope, balancing tension and prolonging the service life
Active Publication Date: 2020-08-28
ANSTEEL BEIJING RES INST
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[0003] Chinese patent application number: 200710159258.6, which discloses a method and device for keeping the tension balance of each strand of steel wire rope during twisting. This patent mainly designs a manual hydraulic damping device to change the movement resistance on the reel, but does not involve strands Precise Control Method of Tension
This method is difficult to ensure the stability of the tension of each strand, and it is also impossible to achieve the control of eliminating the excessive tension deviation between each strand
Method used
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[0054] See Figure 1-Figure 4 , the present invention is aimed at the variable speed unwinding process of the rope forming machine. The change of the coil diameter leads to the fluctuation of the tension during unwinding. By calculating the functional relationship between the braking torque and the unwinding radius, in the tension control system, the tension sensor detects the tension of the strand rope, and through the wireless The transmission module is sent to the PLC controller for compensation and correction, and the control signal is output after data processing combined with the coil diameter value, which drives the actuator to act on the unwinding, controls the unwinding speed, and realizes the tension control of the unwinding process.
[0055]Basket roping machine winding model such as figure 1 As shown, the pay-off wheel used in the rope forming machine is 165 type, the rotating speed of the cylinder is 140r / min, the radius r of the cylinder is 240mm, the diameter D ...
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The invention relates to a basket type cabling machine variable-speed unwinding process dynamic tension control method which includes the steps: 1) calculating angular acceleration and rotary inertiaof a pay-off wheel; 2) calculating braking torque of the pay-off wheel, acquiring instant roll diameter R(t) by a roll diameter calculation method based on time and model, calculating a base value Mzn0 of the braking torque according to the braking torque, detecting deviation of actual tension, outputting a compensation value Mzn1 of the braking torque by a controller, summing the base value and the compensation value to obtain an actual setting value of the braking torque, limiting the rotating speed of the pay-off wheel through the action of a brake to reach pay-off of constant tension. In the unwinding process of stranded ropes, the running speed of the stranded ropes is determined by traction rotation speed and unwinding rotation speed, the pay-off wheel rotates in an accelerated manner in order to keep invariability of line speed, and a balance equation can be acquired by taking the pay-off wheel as a research object. The method has the advantages that tension balance of the stranded ropes is ensured, the twisting quality of a steel rope is improved, and the service life of the steel rope is prolonged.
Description
technical field [0001] The invention belongs to the field of tension control of a basket-type rope forming machine, and in particular relates to a dynamic tension control method in the variable-speed unwinding process of a basket-type rope forming machine. Background technique [0002] The steel wire rope is a spiral steel wire bundle made of several steel wires or strands twisted according to certain rules. After research and analysis, it is found that the tension control of the steel wire or strands in the process of twisting the steel wire rope has an important influence on the quality of the steel wire rope. The basket-type rope forming machine is the main equipment in the production of steel wire rope. During the process of unwinding the strands, the running speed of the strands is determined by factors such as the traction pulley, the unwinding coil diameter, and the rotational speed. When the running speed or tension of the strands changes, there will be acceleration...
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IPC IPC(8): D07B7/02D07B7/10
CPCD07B7/02D07B7/10
Inventor 张岩刘宝权秦大伟曹忠华
Owner ANSTEEL BEIJING RES INST