Automatic gain control (AGC) oil cylinder positioning device of finishing mill

Abstract

The utility model discloses an AGC (automatic gain control) oil cylinder positioning device of a finishing mill. The AGC oil cylinder positioning device comprises an AGC oil cylinder locking plate fixed on a rolling mill housing, wherein the AGC oil cylinder is located in the middle of the AGC locking plate, the two sides of the AGC oil cylinder locking plate are each connected with a positioning block with an inner arc surface through a bolt, a connecting rod is connected between the lower portions of the positioning blocks through a bolt, the positioning device limits movement and rotation of the oil cylinder in the X / Y-axis direction through the arc surfaces, and meanwhile rotation of the AGC oil cylinder in the Z-axis direction is limited through the connecting rod; the problems of rotation and displacement of the oil cylinder are solved by limiting five degrees of freedom of the AGC oil cylinder body; the AGC oil cylinder body is matched with the positioning device, and positioning and guiding of the AGC oil cylinder are completed.

Description

Technical Field

[0001] The utility model relates to an AGC oil cylinder positioning device for a finishing mill. Background Art

[0002] The bottom surface of the T-block at the top of the piston rod of the AGC hydraulic cylinder of Bagang's 1750 hot rolling mill is 143mm away from the top surface of the locking plate, and the thickness of the locking plate is 60mm. When the AGC hydraulic cylinder drops to the lowest position, the locking plate cannot limit the freedom of rotation of the AGC hydraulic cylinder. When the AGC hydraulic cylinder rotates slightly, it will cause severe friction with the locking plate when the AGC hydraulic cylinder rises. After multiple actions, the wear of the locking plate increases, causing the AGC hydraulic cylinder to easily shift, resulting in displacement and inability to work normally. Secondly, when the AGC hydraulic cylinder is not positioned accurately, the interference ladder cannot automatically reach its position. As a result, the signal detection during the automatic roll changing process is not in place, causing the roll changing to be terminated, and manual replacement is required, which prolongs the roll changing time. Summary of the invention

[0003] The utility model aims to provide a finishing mill AGC oil cylinder positioning device, which has a simple structure and low investment, can effectively prevent the problem of the finishing mill AGC hydraulic cylinder rotation displacement, and prolong the service life of the equipment.

[0004] The purpose of the utility model is achieved as follows: a finishing mill AGC cylinder positioning device, comprising an AGC cylinder locking plate fixed on the rolling mill arch; wherein the AGC cylinder is located in the middle of the AGC locking plate, and both sides of the AGC cylinder locking plate are respectively connected to a positioning block with an inner arc surface by bolts, and a connecting rod is provided between the lower parts of the positioning blocks by bolt connection, and the positioning device limits the movement and rotation of the cylinder in the X / Y axis direction through the arc surface, and limits the rotation of the AGC cylinder in the Z axis direction through the connecting rod; by limiting the 5 degrees of freedom of the AGC cylinder body, the problem of cylinder rotation and displacement is solved; the AGC cylinder body and the positioning device cooperate with each other to complete the positioning and guiding of the AGC cylinder.

[0005] The device is connected to the locking plate by bolts, and is positioned with the existing locking plate through a step pad frame. By increasing the existing locking plate guide contact area and reducing the idle stroke of the cylinder, the AGC cylinder displacement caused by cylinder rotation and wear is solved. The positioning device cooperates with the locking plate to achieve the purpose of solving the AGC cylinder displacement. Since a positioning device is installed on the locking plate of the AGC hydraulic cylinder of the finishing mill, the positioning guide contact area of ​​the AGC cylinder is increased. At the same time, the device has an anti-rotation function, which solves the problem of AGC cylinder rotation, thereby eliminating the failure of AGC hydraulic cylinder rotation displacement. The utility model has a simple structure and low investment, effectively prevents the problem of AGC hydraulic cylinder displacement of the finishing mill, and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0007] Figure 2 It is an assembly diagram of the utility model. DETAILED DESCRIPTION

[0008] A finishing mill AGC cylinder positioning device, such as Figure 1 , Figure 2 As shown, it includes an AGC cylinder locking plate 4 fixed on the rolling mill arch; wherein the AGC cylinder 5 is located in the middle of the AGC locking plate 4, and the two sides of the AGC cylinder locking plate 4 are respectively connected to a positioning block 1 with an inner arc surface by bolts 2, as shown in FIG. Figure 1 As shown, the positioning block 1 has two bolts, one above and one below. The upper bolt 2 is used to fix the positioning block 1 on both sides of the AGC oil cylinder locking plate 4, and the lower bolt is used to fix a connecting rod 3 between the positioning blocks 1. The connecting rod 3 is connected between the lower parts of the positioning blocks 1 by bolts. The positioning device limits the movement and rotation of the oil cylinder in the X / Y axis direction through the arc surface, and limits the rotation of the AGC oil cylinder in the Z axis direction through the connecting rod 3. By limiting the five degrees of freedom of the AGC oil cylinder body, the problem of oil cylinder rotation and displacement is solved; the AGC cylinder body and the positioning device cooperate with each other to complete the positioning and guiding of the AGC oil cylinder.

[0009] By installing the locking plate accessory, the abnormal rotation and displacement problems of the AGC cylinder on site were eliminated; secondly, by adding the existing positioning device, the original problem of the locking plate being unable to be removed due to abnormal wear was solved, which indirectly improved the maintenance and replacement efficiency of the AGC cylinder by 46%. Abnormal operations caused by the AGC displacement problem on site were eliminated.

Claims

1. A finishing mill AGC cylinder positioning device, comprising an AGC cylinder locking plate fixed on a mill arch; wherein the AGC cylinder is located in the middle of the AGC locking plate, and is characterized by: A positioning block with an inner arc surface is connected to both sides of the AGC cylinder locking plate by bolts, and a connecting rod is arranged between the lower parts of the positioning blocks by bolts. The positioning device limits the movement and rotation of the cylinder in the X / Y axis direction through the arc surface, and limits the rotation of the AGC cylinder in the Z axis direction through the connecting rod.

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