A method for controlling the positioning of the joint shaft of a cold rolling mill
A control method and axis positioning technology, which is applied in the direction of metal rolling, metal rolling, metal rolling racks, etc., can solve the problems of positioning error exceeding the limit and inconvenient maintenance of detection components, so as to achieve precise positioning control and avoid contact Axis positioning error out-of-limit fault, effect of reducing downtime
Active Publication Date: 2018-12-04
ANGANG STEEL CO LTD
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Problems solved by technology
The disadvantage of this method is that it is easily affected by changes in external conditions such as friction and inertia during the free stop process, causing positioning errors to exceed the limit, and at the same time, many detection components are not easy to maintain
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Embodiment Construction
[0024] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0025] A method for controlling the positioning of a cold rolling mill connecting shaft, comprising the following steps:
[0026] 1) Spindle positioning deceleration start control;
[0027] Such as figure 1 As shown, the positioning rotation angle of the connecting shaft and the rotating speed of the connecting shaft are detected by the encoder, and the encoder is installed coaxially with the motor drive shaft; the positioning start position of the connecting shaft is detected by the proximity switch, which is installed on the outside of the connecting shaft The axial position of the shaft is 200-300mm away from the coupling shaft and the gearbox coupling, and the height is flush with the center line of the motor drive shaft; a square stopper is welded on the transmission shaft, and the stopper is consistent with the axial installation position o...
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The invention relates to a cold rolling mill connecting shaft positioning control method. The cold rolling mill connecting shaft positioning control method comprises the following steps: coaxially mounting an encoder with a transmission shaft of a motor; detecting a positioning starting position of a connecting shaft through a proximity switch; welding a square stop block on a transmission connecting shaft; connecting a working roller connecting shaft with the transmission shaft of the motor through a gear box, and driving the connecting shaft to rotate; when the connecting shaft is positioned and after the rotating speed of the motor reaches a positioning initial rotating speed, triggering the proximity switch by using the stop block, and starting the connecting shaft positioning at a reduced speed; and calculating a positioning stroke of the connecting shaft according to the position of the connecting shaft when the proximity switch sends a signal and a specified target position, calculating a positioning rotating speed set value according the positioning stroke and the initial rotating speed of the connecting shaft, enabling the motor to operate at a reduced speed according to the positioning rotating speed set value until the motor stops, and completing the positioning of the connecting shaft. In order to improve the positioning precision, the positioning rotating speed set value is subjected to linear treatment at the end of a speed reducing process; according to the cold rolling mill connecting shaft positioning control method, high-precision positioning control of the working roller connecting shaft can be realized; a fault caused by an ultra-limit of a connecting shaft positioning error is effectively avoided; a roller of a cold rolling mill is replaced smoothly; and the operating rate of a machine set is improved.
Description
technical field [0001] The invention relates to the technical field of changing work rolls of a cold rolling mill, in particular to a method for controlling the positioning of a connecting shaft of a cold rolling mill. Background technique [0002] During the production process of the cold rolling mill, when the roll wears to a certain extent, it must be replaced in time to meet the requirements of product quality and specifications. Work roll shaft positioning is an important link in the process of changing work rolls in cold rolling mills, and it is the basic premise to realize automatic control of the roll change process. Before drawing the work rolls in the cold rolling mill, it is required to rotate the transmission shaft of the work rolls to the specified target position. The position deviation of the rolls is within 3 degrees. If the positioning error of the joint shaft exceeds the limit, the automatic roll changing process will be interrupted, and serious equipment d...
Claims
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IPC IPC(8): B21B31/08B21B35/14
CPCB21B31/08B21B35/14
Inventor 秦大伟王军生金耀辉李志锋张岩刘宝权宋君侯永刚吴萌费静
Owner ANGANG STEEL CO LTD