JPH055207U - Rolling mill and work roll position abnormality detecting device used in the rolling mill - Google Patents

Abstract

(57) [Summary] [Purpose] To avoid abnormal approach of the work roll chock and the housing and cylinder block, and prevent their mutual interference. [Structure] A work roll position including a striker 2 with a boss 3 that moves vertically and a proximity switch 1 that detects the vertical movement of the striker at a position where the upper and lower work roll chocks 55, 56 and the housing 50 face each other. An anomaly detector was provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a rolling mill and a work roll position abnormality detecting device used in the rolling mill. It

[0002]

[Prior art]

FIG. 3 is a front view showing a main part of a rolling mill as a conventional example. In roll setting such as roll changing of the rolling mill as shown in the above figure, the contact (rolling) position of the upper work roll 51 and the lower work roll 52 is determined by the upper and lower screw 61, the lower and lower screw 62, the lower cylinder 59, or the like. The mechanical stroke measurement value of the reduction device and the roll diameters D ₁ and D _{2 of the} upper and lower backup rolls 53 and 54 and the roll diameters d ₁ and d ₂ of the upper and lower work rolls 51 and 52 are input and calculated in the control device. Then, the upper screw 61 and the lower screw 62 are operated to set them on the pass line 70. In the figure, 57 is an upper backup roll bearing box, and 58 is a lower backup roll bearing box.

[0003]

[Problems to be solved by the device]

The roll diameters d ₁ , d ₂ , D ₁ and D ₂ of the upper and lower work rolls 51 and 52 and the upper and lower backup rolls 53 and 54 are mis-inputted, and as shown in FIG. , 54 are mistakenly installed upside down, the rolling parts of the upper and lower work rolls 51, 52 are set at positions displaced from the pass line 70. If this deviation amount h is large, the work roll chocks 55 and 56 of either the upper or lower side interfere with the cylinder block 60 that is embedded in the housing 50 and protrudes vertically to bend the upper and lower work rolls 51 and 52, respectively. To be damaged.

As a means for preventing this damage, a position where the upper and lower work rolls 51 and 52 come into contact with each other and cannot approach each other is calculated in advance, and a rolling force is generated in front of this position, or If the rolling force does not occur even if the position is exceeded, a method is considered to be considered as abnormal and an alarm is issued. In this method, the roll diameters D ₁ and D ₂ of the upper and lower backup rolls 53 and 54 are increased. If input is made upside down, it is not possible to detect an abnormal contact position between the upper and lower work rolls 51, 52 (deviation from the pass line 70).

[0005]

[Means for Solving the Problems]

  MEANS FOR SOLVING THE PROBLEMS The rolling mill according to the present invention and the work used in the rolling mill The structure of the roll position abnormality detecting device is as follows.   (1) Work roll position at the position where the work roll chock and housing face each other. It is characterized in that a positional abnormality detecting device is provided.

[0006]   (2) When the work roll chock and the housing change in the vertical direction, A striker that moves downward and a sensor that detects the vertical movement of this striker It is characterized by consisting of.

[0007]

[Action]

  (1) When setting the work roll in the housing by changing rolls, etc., The roll diameter of the roll-up roll, work roll, etc. was mis-input into the control device. If a roll with a large roll diameter is set incorrectly, As a result, the vertical position of the work roll becomes abnormal. This work roll position error By the work roll chock and the housing and embedded in this housing If the cylinder block for roll bending abnormally approaches, the work roll The position abnormality detection device activates and issues an alarm to stop the operation of the pressure reduction device. The interference between the wheel chock, the housing and the cylinder block is prevented.

[0008]   (2) The work roll chock and housing and cylinder block are abnormally close to each other Then, the striker moves within the detection range of the sensor, and the sensor moves this striker. By detecting the abnormal position of the work roll.

[0009]

【Example】

  Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.   The same members and parts as those of the conventional device are designated by the same reference numerals and duplicated. The description is omitted.   FIG. 1 is a front view showing a main part of the rolling mill of the present invention, and FIG. 2 is an enlarged view of the position detector of FIG. FIG.

[0010]   In the above figure, 9 is a plate, and the upper and lower work roll chocks 55, 56 Is fixed to the surface of the cylinder block facing the cylinder block 60 so as to project from the outer surface thereof. It

[0011]   10 is a position detector, which is screwed into a nut 6 in the casing 5 and is not shown in the figure. The proximity switch 1 connected to the control device and the spring 4 in the casing 5 The cup-shaped striker 2 urged upward and the casing 5 penetrate the striker. It consists of a boss 3 fixed to the upper surface of the mosquito 2 and a housing 8 via a bracket 8. It is fixed to the outer surface of the ring 50.

[0012]   In addition, the position detection facing the plate 9 fixed to the lower work roll chock 56 is performed. The output device 10 is installed so that the top and bottom thereof are opposite to those shown in FIG.

[0013]   Next, the operation of this device will be described.   Use the upper and lower work rolls 51 and 52 or the upper and lower backup rolls 53 and 54. When setting in the housing 50, for example, the roll of the upper backup roll 53 If the diameter is mis-input to the control device (not shown) smaller than the actual size, the upper pressure By the operation of the lower device (not shown), the upper backup roll 53 is used to drive the upper work. The lower surface of the roll 51 is lowered below the pass line 70.

[0014]   By lowering the upper work roll 51, the upper work roll chock 55 and the pre-work roll The seat 9 also descends, and the upper work roll chock 55 is the rod of the cylinder block 60. When trying to press 60a, the boss 3 and the striker 2 come into contact with the plate 9 before that. When the striker 2 is pressed and descends, the proximity switch 1 detects the descending of the striker 2 and the control device Device (not shown). The controller (not shown) will immediately receive this signal. Then, the operation of the pressure reducing device (not shown) is stopped, and the reverse operation is performed to perform the upper back-up operation. The prowl 53 is raised.

[0015]   In this way, the upper and lower work roll chocks 55, 56 are cylinder blocks. And the upper and lower work rolls 5 caused by pressing the rod 60 and its rod 60a. The deviation of the rolling parts 1, 52 from the pass line 70 is prevented.

[0016]   The work roll position abnormality detection device of the present invention is a work roll chock and Even if the position with the housing moves in the horizontal direction, its function works normally. It can also be used in roll cross rolling mills and roll shift rolling mills.   Further, the present invention is not limited to the position detector having the structure of the above-mentioned embodiment, and the striker and Alternatively, a position detector having another structure including a sensor and a sensor may be used.

[0017]

[Effect of device]

  (1) In the rolling mill of the present invention, a work roll chock and a housing are provided between the work roll chock and the housing. By installing the crawl position abnormality detection device, work roll or back up When setting the roll inside the housing, for example The work roll chock for roll bending is When abnormally approaching the cylinder block, the abnormality is detected by the work roll position abnormality detection device. Detects that the work of the work roll chock and cylinder is stopped. Prevention of damage due to interference with blocks and pass line of upper and lower work roll rolling parts It is possible to prevent abnormal deviation from the.

[0018]   (2) In the work roll position abnormality detection device of the present invention, the work roll chock and A striker that moves in the vertical direction according to changes in the vertical distance from the housing, A sensor to detect abnormal movement of this striker is installed to directly position the work roll. Detecting abnormalities in the work roll position easily and reliably by detecting It is possible to obtain the same effect as the effect of the rolling mill described above.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of a rolling mill as an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of the position detector of FIG.

FIG. 3 is a side view showing a main part of a rolling mill as a conventional example.

FIG. 4 is a side view showing a defect of the rolling mill of FIG.

[Explanation of symbols]

1 Proximity switch 2 striker 3 boss 10 Position detector 50 housing 51 upper work roll 52 Lower work roll 53 Upper backup roll 54 Lower backup roll 55 Top work roll chock 56 Lower work roll chock 60 cylinder block 70 pass line

Claims (2)

[Scope of utility model registration request] 1. A rolling mill comprising a work roll position abnormality detection device provided at a position where a work roll chock and a housing face each other. 2. A work roll position for a rolling mill, comprising a striker that moves in the vertical direction according to a change in the vertical distance between the work roll chock and the housing, and a sensor that detects the vertical movement of the striker. Anomaly detection device.