KR100306590B1 - Automatic measuring apparatus for edger roll gap by using telescopic traveling equipment - Google Patents

Abstract

PURPOSE: An automatic measuring apparatus for edger roll gap by using telescopic traveling equipment is provided to achieve improved accuracy, convenience and safety, while reducing space occupation and allowing maintenance to be easily performed. CONSTITUTION: An apparatus comprises a distance detecting sensor(10) by using air pressure or laser; a hydraulic cylinder(20) having the distance detecting sensor installed over the top of the hydraulic cylinder, and which lifts the distance detecting sensor to the upper measurement position or lowers the distance detecting sensor to the lower non-measurement position; and guide rails(21,22,23) installed at both sides of the cylinder, and which guide and support the movement of the hydraulic cylinder and distance detecting sensor.

Description

Edge roll gap automatic measuring device using telescopic moving device

The present invention relates to an apparatus for automatically measuring the gap between edger rolls used in a rough milling process of a steel mill in a steel mill, and has an excellent measurement accuracy compared to the manual measurement of the gap between edger rolls. The present invention relates to an automatic edger gap measuring device using a telescopic moving mechanism that can reduce the workload of manual measurement as well as measure edger roll gap easily and quickly.

Rough rolling refers to a step of first rolling a slab heated to 1000-1100 ° C. in a reheating furnance for finishing milling as shown in FIG. 1. Edger roll in the rough rolling process is a roll for performing the width rolling of the rolled material, the maintenance of the edger roll spacing in accordance with the target width of the rolled material is directly connected to the width dimension precision of the final product. The present inventors have already proposed a device for automatically measuring the edger roll gap, which means that the mechanism for moving the measuring sensor to the measuring position or the non-measuring position is coupled to the main body of the roughing mill, thereby causing vibrations during rolling. It is a problem of the present invention to provide a further improved device in which the problem is solved because of the problem of deterioration of precision, high durability during operation, and durability of the device due to the high moisture atmosphere.

In the present invention, the movement of the measuring sensor of the edger roll gap measuring device is made by using a telescopic feed mechanism. In the case of non-measurement, the center of the device is placed in a contracted state in the free space under the edger roll. The hydraulic cylinder located at was operated to raise the measuring sensor to the actual measuring position between the edger rolls. When using such a transfer mechanism, the installation space occupied by the device is greatly reduced, which greatly reduces the constraints of the work space and greatly reduces the manufacturing cost. Furthermore, the measurement error caused by the miniaturization of the device is reduced, and the measurement accuracy is also reduced. Greatly improved.

As shown in FIG. 2, the edger roll 1 of the roughing mill is a roll rolling width with respect to the rolling material 3, whereas the horizontal roll 2 having the thickness rolling is close to the edger roll 1. It was not easy to install the automatic measuring device because the free space was not big, and the temperature of the rolled material during the rough rolling using these rolls was about 1000 ℃, and a large amount of water vapor and dust were generated. It was difficult to repair and there was no case where an automatic measuring device was installed. Conventionally, the method used to measure the edge of the edger roll was to calibrate the roll gap using a reference length of a certain length (typically 1m), which is a manual operation of the roll to a width corresponding to the length of the reference length. As it is a method to maintain the roll interval as close as possible through the time, there is a problem that the time-consuming and large measurement error, as well as the safety risks of work exist. In order to compensate for this, the present inventors have developed an edge roll gap automatic measuring device equipped with a measuring sensor moving device using a link mechanism, which has brought considerable work load reduction and width dimensional accuracy. This device is designed to install major components such as measuring sensor and its moving means in the relevant rolling device body, which has the disadvantage of being exposed to shocks and vibrations in the field operation and falling measurement accuracy.

In addition, as a result of long-term real-world application after the installation of the device, there was a problem in the field maintenance, such as the laser rangefinder, which is a sensor for air-conditioning, due to vibrations and shocks generated during operation, and thus need to be calibrated from time to time. .

Furthermore, as a complement to the device, the present inventors have developed another device including a measuring sensor moving means using a rotating arm to measure the measurement error due to the vibration of the rolling mill and the high temperature and high moisture atmosphere during the operation and the measurement device. It was intended to prevent breakage. This device has been shown to improve the measurement accuracy deterioration problem due to vibration and shock, compared to the previous device in which the measurement sensor moving means are installed on the relevant rolling mill body. Due to the large operating radius of the mobile device, there is a limitation of the work space, and the measurement time is also long, which takes about 6-8 minutes.

It is an object of the present invention to provide an edge roll gap automatic measuring device which further improves the problems of the aforementioned conventional manual measuring method and the proposed devices. The telescopic sensor moving device according to the present invention includes a device including a measuring sensor moving device using the link mechanism 4 of FIG. 3 or a measuring sensor moving device using the rotary arm 5 of FIG. Compared with better measurement accuracy and more compact device, it can be installed in a narrow space and can be manufactured at low cost.

1 is a schematic diagram of a hot rolling process.

Figure 2 is a perspective view of the installation and use of the edger roll.

3 is a configuration diagram of a sensor moving mechanism using a link device.

4 is a configuration diagram of a sensor moving mechanism using a rotary arm.

5 is a schematic view of a device including the telescopic feed mechanism of the present invention, in which (a) is a plan view thereof, and (b) is a front view.

6 is an enlarged front view of a state in which the measuring sensor is raised to the measuring position in the apparatus of FIG. 5;

7 is a front view comparing the falling state and the rising state of the measuring sensor of the device.

8 is a side view of the apparatus showing an edger roll gap measurement state.

9 is a flowchart of measurement steps using the present invention.

* Explanation of symbols for main parts of the drawings

1: edger roll 2: horizontal roll

3: rolling material 4: link mechanism

5: rotating arm 10: measuring sensor

20: telescopic hydraulic cylinder 21, 22, 23: guide rail

Hereinafter, the present invention for achieving the above object will be described in more detail with reference to the accompanying drawings.

The main components of the apparatus of the present invention are shown in FIG. In the non-measurement, the measurement sensor 10 is seated in the edger roll lower space, and the measurement sensor 10 rises to the measurement position while the hydraulic cylinder 20 located at the center of the measurement rises. According to the present invention, since the measurement sensor 10 only moves linearly through the operation of the hydraulic cylinder 20 which is a telescopic method (for example, a multi-stage drawing method such as a car antenna), the measurement error occurrence factor is greatly reduced and the installation space is greatly reduced. This has the advantage of shrinking.

As shown in FIG. 6, in order to prevent vibration and inclination which may occur when the measuring sensor 10 is lifted by the hydraulic cylinder 20, both sides of the cylinder and the measuring sensor installed thereon are supported on both sides of the hydraulic cylinder 20. 10) A plurality of guide rails (21, 22, 23) is installed to enable accurate ascent lifting. As the measuring sensor 10, a pneumatic or laser sensor can be used.

7 shows a comparison between the lowered state and the elevated state of the measuring sensor 10 of the apparatus. The lifting and lowering of the measuring sensor in this state takes place within a short time of less than one minute, thereby making the measuring time faster.

In FIG. 8, a side view of the apparatus is used to show the actual gap measuring state between edger rolls.

9 is a flow chart of edger roll gap measurement steps using the device of this invention.

After assembling and installing the above-described components to complete the sphere measurement device of the present invention, the actual measurement is shown in Table 1 below by comparing the results of the measurement with the proposed devices. As shown in Table 1, the present invention has significantly improved the measurement time compared to the proposed method, and the measurement error is also the least, it can be seen that the use effect is excellent.

TABLE 1

Compared to the proposed devices, the present invention occupies less installation space and has a much higher measurement accuracy, and also reduces measurement time to about 2 to 3 minutes, thereby enabling a more rapid measurement.

Claims (1)

Pneumatic or laser type distance measuring sensor 10, and the multi-stage withdrawal hydraulic cylinder 20 for supporting the measuring sensor 10 installed on the upper end and moving it to the non-measured position of the upper or lower position and And a guide rail (21, 22, 23) provided on both sides of the hydraulic cylinder 20 to guide and support the lifting operation of the hydraulic cylinder (20) and the measuring sensor (10). Edge gap measurement automatic measuring device.