CN106975666A - Rolling mill roll position detecting system - Google Patents

Abstract

The invention relates to the field of rail rolling equipment, in particular to a rolling mill roll position detection system that more accurately realizes rolling mill roll movement monitoring through the principle of optical measurement, including an upper roll and a lower roll to be detected, including a laser monitoring device, an upper The end of the same end of the roll and the lower roll is respectively provided with an upper roll cone and a lower roll cone, and the light curtain emitted by the laser monitoring device passes through the upper roll cone and the lower roll cone to form a shadow area of the light curtain. The laser monitoring device monitors the axial variation of the upper roll and the lower roll by monitoring the shadow area of the light curtain and the change of the light curtain. The present invention obtains the accurate condition of the movement of the upper roll and the lower roll through the detection of the laser monitoring device, thereby realizing real-time and accurate control and ensuring the smooth progress of production. The invention is especially suitable for the production occasions that need to precisely control the running state of the upper roll and the lower roll so as to realize high-efficiency production.

Description

Roll position detection system for rolling mill

technical field

The invention relates to the field of rail rolling equipment, in particular to a rolling mill roll position detection system.

Background technique

Due to the asymmetry of the shape of the rolled piece during the rolling process, the rolls of the rolling mill have axial movement. There is a large difference between the axial movement when passing steel and the time when passing steel. Do it the easy way. However, it is difficult to measure the axial movement value of the roll under the influence of temperature, roll cooling water, dust, vibration, and large axial force during dynamic. When the axial movement cannot be known, the roll gap adjustment can only be performed empirically, resulting in defective products caused by a large number of adjustments. At the same time, the position of the upper and lower rolls will also change when passing the steel. Since it is a dynamic change, it cannot be accurately measured by the displacement sensor of the rolling mill itself. The existing method of dynamically measuring the axial position of the bearing seat to determine the dynamic axial position of the roll not only cannot monitor the dynamic position change of the upper and lower rolls, but also has the following problems: 1. The error caused by the gap between the bearing seat and the roll cannot be ruled out ; 2. The gap between the bearing seat and the rolling mill archway cannot be ruled out. Due to the wear of the archway wear plate, the largest measurement error has reached 5mm.

The existing detection method is to monitor the change of the axial displacement of the roll when the roll passes through the steel by placing the measuring probe on the end of the roll to be measured, and then transmit the measured value to the display through the displacement sensor for observation or directly pass the The measured value is amplified mechanically on the counting disc for intuitive reading. But the existing method also has the following problems: one, the support point of the testing equipment on the archway is affected by dust, water mist, etc., the installation is unstable and shakes greatly, and the installation surface is uneven; two, the installation time of the testing equipment is as long as 30- 50 minutes, affecting production efficiency; 3. The working environment such as dust and water affects the detection accuracy of the equipment, and at the same time leads to the failure of the detection equipment; 4. It is impossible to monitor the dynamic changes in the position of the upper and lower rolls.

Contents of the invention

The technical problem to be solved by the present invention is to provide a rolling mill roll position detection system that more accurately realizes rolling mill roll movement monitoring through the principle of optical measurement.

The technical solution adopted by the present invention to solve the technical problem is: the roll position detection system of the rolling mill, including the upper roll and the lower roll to be detected, including a laser monitoring device, and the ends of the same end of the upper roll and the lower roll are respectively provided with upper The roll cone and the lower roll cone, the light curtain emitted by the laser monitoring device passes through the upper roll cone and the lower roll cone to form a shadow area of the light curtain, and the laser monitoring device monitors the shadow area of the light curtain and the light curtain The monitoring of the axial movement of the upper roll and the lower roll is realized.

Further, the laser monitoring device is composed of a light curtain generator and a camera.

Further, the range of shooting angle between the camera and the light curtain is 30-60 degrees.

Further, the central axis of the cone of the upper roll is arranged coaxially with the central axis of the upper roll.

Further, the central axis of the cone of the lower roll is arranged coaxially with the central axis of the lower roll.

The beneficial effects of the present invention are: firstly, the present invention ingeniously arranges the upper roll cone and the lower roll cone at the end of the same end of the upper roll and the lower roll, and then uses the light curtain emitted by the laser monitoring device to form a light curtain shadow area, so as to build a sensitive, accurate and monitorable detection benchmark. On this basis, through the detection of the laser monitoring device, the accurate situation of the movement of the upper roll and the lower roll can be obtained, so as to achieve real-time and accurate control and ensure production. went well. The invention is especially suitable for the production occasions that need to precisely control the running state of the upper roll and the lower roll so as to realize high-efficiency production.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Marked in the figure: upper roll 1, upper roll cone 11, lower roll 2, lower roll cone 21, light curtain generator 3, light curtain 31, light curtain shadow area 32, camera 4.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

The rolling mill roll position detection system as shown in Figure 1 includes the upper roll 1 and the lower roll 2 to be detected, including a laser monitoring device, and the ends of the same end of the upper roll 1 and the lower roll 2 are respectively provided with upper roll cones 11 and the lower roll cone 21, the light curtain 31 emitted by the laser monitoring device forms the light curtain shadow area 32 after being provided with the upper roll cone 11 and the lower roll cone 21, and the laser monitoring device passes through the monitoring light curtain shadow area 32 and the change of the light curtain 31 to realize the monitoring of the axial movement of the upper roll 1 and the lower roll 2.

The present invention utilizes the principle that the roll will change the length of the laser line on the cone when the bearing moves, and calculates the amount of movement of the roll shaft by calculating the change in the arc length of the laser. At the same time, it can measure the distance between the cones of the upper and lower rolls, so as to monitor the dynamic change of the roll gap of the lower roll. An ingenious feature of the present invention is that the upper roller cone 11 and the lower roller cone 21 are selected, and the characteristic that the shadow area 32 of the light curtain changes linearly when the cones move in the axial direction is used for the dynamics of the laser monitoring device. Monitoring provides assurance. In addition, in actual use, the basic steps are as follows: after the corresponding device is installed, the first calibration is carried out, the upper roll 1 and the lower roll 2 are placed in the zero position, and the laser monitoring device measures the cone of the upper roll. Body 11 and lower roll cone 21 respectively form the shadow length L0up, L0down of the light curtain shadow area 32 and the center point distance S0 of the two axes, and then change the roll gap value and axial value respectively according to the gradient and measure the corresponding L1up, L1down , S1, and L2up, L2down, S2, etc., and finally calculate the relationship between the axial change and Lxup, Lxdown, and calculate the relationship between the roll gap change and Sx, and perform correction processing, so that in actual monitoring, the output is Change information such as the distance between centers of the upper roll 1 and the lower roll 2 and the relative position in the axial direction. Generally, the laser monitoring device is selected to be composed of a light curtain generator 3 and a camera 4 . Further, when using the camera 4 for monitoring, in order to ensure the accuracy of monitoring, it is preferable that the shooting angle between the camera 4 and the light curtain 31 ranges from 30° to 60°.

As a key design for monitoring, it is preferable to arrange the central axis of the upper roll cone 11 coaxially with the central axis of the upper roll 1 and the central axis of the lower roll cone 21 and the central axis of the lower roll 2 to be arranged coaxially. Thereby ensure that when the upper roll 1 and the lower roll 2 rotate, the upper roll cone 11 and the lower roll cone 21 have a stable running state, thereby ensuring the smooth progress of monitoring.

In the present invention, firstly, the upper roll cone and the lower roll cone are cleverly arranged at the ends of the same end of the upper roll and the lower roll, and then the light curtain emitted by the laser monitoring device is used to form the shadow area of the light curtain, thereby constructing a sensitive and accurate On this basis, through the detection of the laser monitoring device, the accurate situation of the movement of the upper roll and the lower roll can be obtained, so as to realize real-time and accurate control and ensure the smooth progress of production.

Claims (5)

1. rolling mill roll position detecting system, including topping roll (1) and bottom roll (2) to be detected, it is characterised in that：Including swashing The termination of same one end of light supervising device, the topping roll (1) and bottom roll (2) be respectively arranged with topping roll cone (11) and Bottom roll cone (21), light curtain (31) that laser monitor device is launched through being provided with topping roll cone (11) and under roll Roller cone (21) forms light curtain shadow region (32) afterwards, the laser monitor device by monitor light curtain shadow region (32) with And light curtain (31) change and realize the monitoring axially changed to topping roll (1) and bottom roll (2).

2. rolling mill roll position detecting system as claimed in claim 1, it is characterised in that：The laser monitor device is by light curtain Generator (3) and video camera (4) are constituted.

3. rolling mill roll position detecting system as claimed in claim 2, it is characterised in that：The video camera (4) and light curtain (31) angular range of the shooting angle between is 30-60 degree.

4. the rolling mill roll position detecting system as described in claim 1,2 or 3, it is characterised in that：The topping roll cone (11) central axis coaxial of central axis and topping roll (1) is arranged.

5. the rolling mill roll position detecting system as described in claim 1,2 or 3, it is characterised in that：The bottom roll cone (21) central axis coaxial of central axis and bottom roll (2) is arranged.