Tail-clamping brake cylinder protection method

Abstract

The invention discloses a cylinder protection method for a tail clamp brake device, comprising the following steps: after the bar is cut by a multiple-length shear, the bar is completely driven by a brake roller, and the bar movement speed is equal to the brake roller linear speed; the brake roller linear speed is reduced by controlling the motor speed of the tail clamp brake device to reduce the bar movement speed, and the tail movement position of the bar is obtained by calculation and tracking according to the feedback speed of the bar movement speed; when the bar movement speed on the brake roller line is equal to the release speed, and the tail movement position of the bar is in front of the brake roller, the brake roller is opened to realize that the brake roller has been opened to release the bar when the tail of the bar leaves the brake roller, thereby eliminating the secondary closing action of the brake roller. The invention can solve the problem that the cylinder of the tail clamp brake device of the existing high-speed steel system is easily damaged and the service life is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steel manufacturing and equipment thereof, in particular to a method for protecting a cylinder in a tail clamping brake device of a high-speed steel feeding system. Background Art

[0002] In the high-speed steel-feeding system of the high-speed bar production line, the tail clamping brake device is arranged at the tail of the high-speed steel-feeding system, including multiple pairs of brake rollers arranged side by side and closed up and down driven by the pneumatic device on the bar conveyor belt to form a brake roller line. The tail end of the tail clamping brake device is connected to the rotating hub of the high-speed steel-feeding system. After the bar is cut into multiple lengths by shearing, the tail clamping brake device uses the pneumatic device to realize the rapid up and down closing of the brake roller to clamp the bar to reduce the running speed of the bar, and then the motor drives the brake roller to rotate to achieve traction, driving and braking of the bar, further reducing the running speed of the bar. After the bar enters the rotating hub at a certain release speed, the brake roller opens to complete the entire action cycle, so as to realize the deceleration and braking of the high-speed running bar at the tail of the high-speed steel-feeding system.

[0003] In order to ensure that the brake roller can stably clamp the bar and ensure that the bar enters the rotating hub at the set release speed, the air pressure of the pneumatic device is required to be large and the closing distance of the upper and lower rollers (cylinder limit stroke) when installing the brake roller should be smaller than the diameter of the bar. Therefore, when the tail of the bar completely leaves the brake roller, if the brake roller continues to remain closed, the cylinder will move to the limit stroke and the brake roller will close for the second time. When the cylinder moves to the limit stroke, the end will produce a certain impact and vibration on the cylinder body. In fast-paced production, the brake roller frequently closes for the second time, which will inevitably cause damage to the cylinder and reduce its service life. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a method for protecting the cylinder of a tail clamping brake device, so as to solve the problem that the cylinder of the tail clamping brake device of the existing high-speed steel-loading system is easily damaged and the service life is reduced.

[0005] In order to solve the above problems, the technical solution of the present invention is: the cylinder protection method of the tail clamp brake device includes the following steps: after the rod is cut into multiple lengths by shearing the rod, the rod is completely driven by the brake roller, and the movement speed of the rod is equal to the linear speed of the brake roller; the linear speed of the brake roller is reduced by controlling the motor speed of the tail clamp brake device to reduce the movement speed of the rod, and the movement position of the tail of the rod is obtained according to the movement speed of the rod; when the movement speed of the rod on the brake roller line is equal to the release speed, and the movement position of the tail of the rod is in front of the brake roller, the brake roller is opened to achieve that the brake roller has been opened to release the rod when the tail of the rod leaves the brake roller, thereby eliminating the secondary closing action of the brake roller.

[0006] In the above technical scheme, a more specific scheme may be: when the uniform speed of the rod is still greater than the release speed, the brake roller continues to close, and the movement speed of the rod continues to be reduced by controlling the motor speed of the tail clamping brake device; when the uniform speed of the rod is equal to the release speed and the movement position of the tail of the rod has entered between the brake rollers, the brake roller continues to close, and the motor speed of the tail clamping brake device maintains the release speed, and the brake roller is opened when the tail of the rod is about to leave the brake roller; when the uniform speed of the rod is equal to the release speed and the movement position of the tail of the rod is in front of the brake roller, the brake roller is opened.

[0007] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0008] The cylinder protection method of the tail clamp brake device obtains the running position of the tail of the bar by calculating and tracking the running speed of the bar, reduces the running speed of the bar to the release speed when the running position of the tail of the bar is in front of the brake roller, and opens the brake roller to achieve that the brake roller has been opened to release the bar when the tail of the bar leaves the brake roller, thereby eliminating the secondary closing action of the brake roller, reducing the impact and vibration of the cylinder, and improving the service life; the method can be combined with the actual action conditions of bars of different specifications and brake rollers, modify the target speed when the bar is released and the distance from the tail movement position to the brake roller, so as to achieve accurate release of the bar with simple operation. DETAILED DESCRIPTION

[0009] The embodiments of the present invention are further described below:

[0010] The cylinder protection method of the tail clamp brake device comprises the following steps:

[0011] After the bar is cut into multiple lengths by shearing, the bar is completely driven by the brake roller, and the bar movement speed is equal to the brake roller linear speed; the brake roller linear speed is reduced by controlling the motor speed of the tail clamp brake device to reduce the bar movement speed, and the movement position of the tail of the bar is obtained according to the bar movement speed.

[0012] When the uniform speed of the bar on the brake roller line is still greater than the release speed, the brake roller continues to close, and the movement speed of the bar continues to be reduced by controlling the motor speed of the tail clamping brake device; when the uniform speed of the bar is equal to the release speed and the movement position of the tail of the bar has entered between the brake rollers, the brake roller continues to close, and the motor speed of the tail clamping brake device maintains the release speed, and the brake roller is opened when the tail of the bar is about to leave the brake roller; when the uniform speed of the bar is equal to the release speed and the movement position of the tail of the bar is in front of the brake roller, the brake roller is opened to ensure that the brake roller is opened and the bar is released when the tail of the bar leaves the brake roller, thereby eliminating the secondary closing action of the brake roller and reducing the impact of the cylinder.

[0013] During the process of the brake roller of the tail clamping device closing and opening, the conditions for judging the movement speed of the rod and the movement position of the tail of the rod are added. When the rod speed is equal to the release speed and the tail of the rod moves to the position in front of the brake roller, the brake roller opens. If neither condition is met, the brake roller remains closed and opens when the tail of the rod is about to leave the brake roller.

[0014] The cylinder protection method of the tail clamp brake device obtains the running position of the tail of the bar by calculating and tracking the running speed of the bar, reduces the running speed of the bar to the release speed when the running position of the tail of the bar is in front of the brake roller, and opens the brake roller to achieve that the brake roller has been opened to release the bar when the tail of the bar leaves the brake roller, thereby eliminating the secondary closing action of the brake roller, reducing the impact and vibration of the cylinder, and improving the service life; the method can be combined with the actual action conditions of bars of different specifications and brake rollers, modify the target speed when the bar is released and the distance from the tail movement position to the brake roller, so as to achieve accurate release of the bar with simple operation.

Claims

1. A method for protecting a cylinder of a tail brake device, characterized in that: The following steps are involved: After the bar is cut into multiple lengths by shearing, the bar is completely driven by the brake roller, and the bar movement speed is equal to the brake roller linear speed; the brake roller linear speed is reduced by controlling the motor speed of the tail clamp brake device to reduce the bar movement speed, and the tail movement position of the bar is obtained according to the bar movement speed; When the uniform speed of the bar is still greater than the release speed, the brake roller continues to close, and the movement speed of the bar continues to be reduced by controlling the motor speed of the tail clamping brake device; when the uniform speed of the bar is equal to the release speed and the movement position of the tail of the bar has entered between the brake rollers, the brake roller continues to close, and the motor speed of the tail clamping brake device maintains the release speed, and the brake roller is opened when the tail of the bar is about to leave the brake roller; when the uniform speed of the bar is equal to the release speed and the movement position of the tail of the bar is in front of the brake roller, the brake roller is opened to ensure that the brake roller is opened and the bar is released when the tail of the bar leaves the brake roller, thereby eliminating the secondary closing action of the brake roller.