KR19980052446A - Edge roll gap automatic measuring device using pneumatic pressure - Google Patents

Abstract

The present invention relates to the provision of an automatic edger roll spacing measuring device, which enables easy, safe and precise measurement of the edger roll spacing used for width rolling of a rolled material in the rough rolling process of a steel mill.

The device of the present invention is a pneumatic distance measuring sensor 10, and the lifting and lowering movement of the measuring sensor 10 to the measuring position in the center between the non-measured position or edger roll safely separated from the roll work place where dust, steam, etc. are generated. It consists of a telescopic transfer device 20 and a signal transmission system 30 for transmitting the measurement signal from the measurement sensor 10 to the cab.

The apparatus of the present invention can easily and safely measure the distance between edger rolls with high reproducibility and measurement accuracy by completely eliminating problems such as low measurement accuracy and safety risks caused by conventional manual measurement while taking up little installation space. It can be effective.

Description

Edge roll gap automatic measuring device using pneumatic pressure

The present invention relates to an apparatus for automatically measuring the distance between the edger roll (EDGER ROLL) used in the ROUGHING MILL process of steel mills, compared to the manual measurement of the current gap between the edger roll The present invention relates to an automatic edger gap measuring device using pneumatic pressure, which is excellent in accuracy and reduces the workload of manual measurement, as well as measuring edge roll gap easily and quickly.

Rough rolling refers to a step of primary rolling to finish milling a slab heated to 1000-1100 ° C. in a reheating furance 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 corresponding to the target width of the rolled material is directly connected to the width dimension precision of the final product. Therefore, the edger roll gap automatic measuring device of the present invention ensures the hot rolled width dimension accuracy, thereby contributing to the improvement of the dimensional quality of the hot rolled coil as well as improving the inefficiency and low precision of manual work. It is. That is, the automatic edge roll measuring device using the air pressure of the present invention is to solve the problem of deterioration of measurement accuracy due to maintenance and vibration, which enables measurement of high precision and high stability as well as maintenance. It is an advanced device with easy advantages. In addition, in the present invention, the movement of the edge roll gap measuring device is made by using a telescopic mechanism, and when the ratio is measured, the hydraulic piston in the middle of the device is placed in a contracted state in the free space under the edge roll. By raising this step by step, the instrument was made to reach the actual measuring position. When the transfer device is used, the transfer device occupies only a very small amount of space, thereby significantly reducing work space limitations and significantly reducing manufacturing costs, and also causing measurement error due to the miniaturization of the device. This reduces the measurement accuracy significantly.

As shown in FIG. 2, the edger roll 1 of the rough mill is a roll that rolls widthwise with respect to the slab 3, while the horizontal roll 2 that is thickly rolled is close to the edger roll 1. The installation of the automatic measuring device was not easy because the free space was not large. The temperature of the rolled material during the rough rolling using such rolls was about 1000 ° C., and a large amount of water vapor and dust were generated. It was difficult to maintain, so no automatic measuring device was installed. Conventionally, the method used to measure the edge of the edger roll was to adjust the roll spacing using a reference length of a certain length (typically 1 m), which is as close to the roll as possible by manual operation. In order to maintain the roll gap, there is a problem in that it is time consuming and measurement error is large, and safety risks of work exist.

The present invention is a safe position that can be protected from high temperature, water vapor and dust during rough rolling operation that does not require the edge roll gap measurement to improve the inefficiency, inaccuracy and safety problems in the edge roll measurement by the conventional manual operation described above. After the rough rolling is completed, the edge roll gap measurement instruction is issued, and the telescopic automatic feeder moves the distance measuring pneumatic sensor to the measurement position to measure the roll gap, and the result is transmitted through the signal transmission system. The aim is to provide an automatic edge gap measurement device that can be delivered to the cab.

1 is a schematic diagram of a hot rolling process.

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

3 is a schematic diagram of a signal transmission system according to the present invention;

Figure 4 is a configuration of the measuring sensor and the transfer device of the present invention, (a) is a plan view, (b) is a front view.

5 is a front view of a state in which the measuring sensor is raised as much as possible in the apparatus of FIG.

Figure 6 is a side view illustrating the operation of the above device in sequence.

Figure 7 is a detailed configuration of the measuring sensor of the present invention.

8 is a configuration diagram of an automatic warning means.

9 is a flowchart of a measurement step of the present invention.

* Description of the symbols for the main parts of the drawings *

1: edger roll 2: horizontal rolling roll

3: rolled material 10: pneumatic distance measuring sensor

11: pneumatic cylinder 12: cylinder arm

13 sensor 20 telescopic feeder

21: hydraulic cylinder 22, 23, 24: guide frame

30: signal transmission system 31: PLC

32: PC system 33: driver

40,50: Safety switch

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

Edger roll gap automatic measuring device of the present invention is a pneumatic distance measuring sensor 10, and a safe position (non-measurement position) that can be spaced apart from the roll work place where the high temperature, water vapor, dust, etc. occur Or a telescopic feeder 20 for moving to a measurement position in the center of the edger roll, and a signal transmission system 30 for transmitting the measurement signal from the measurement sensor 10 to the cab.

Figure 4 is a schematic view showing the main components of the device according to the present invention (a) is a plan view, (b) is a front view thereof. Pneumatic distance measuring sensor 10 for measuring the distance between the edger roll is fixed to the top of the telescopic hydraulic cylinder 21 located in the center can be elevated to the measuring position or non-measurement position according to the operation of the hydraulic cylinder (21). It is installed. Guide frames 22, 23, and 24 are installed on both sides of the measurement sensor 10 and the hydraulic cylinder 21 installed as described above, so that the precise vertical lifting operation of the measurement sensor 10 and the hydraulic cylinder 21 is performed. It is. 4 (b) is a state in which the measuring sensor 10, which is raised and lowered through the telescopic feeder 20, is lowered as much as possible to a non-measured position, and FIG. 5 is maximally ascended to the measuring position. Show each status. Through such a device, the measurement sensor 10 is configured to perform only a linear lifting operation to the measurement position or the non-measurement position, thereby greatly reducing the occurrence factor of measurement error, and lowering the measurement sensor 10 to the non-measurement position. When used, the associated devices occupy significantly less space. Figure 7 shows the configuration of the pneumatic measuring sensor 10 used in the present invention. The measuring sensor 10 is configured to include a pneumatic cylinder 11, a cylinder arm 12, and a sensor 13 attached to the cylinder arm 12 end. The sensor 13 moves forward or backwards to the edge of the measurement object by the action of the pneumatic cylinder 11, and the distance traveled by the end of the sensor 13 is transmitted to the control system in real time. The sensor 13 is a type in which a line voltage differential transformen is built in, so that an error factor due to dust, moisture, temperature, etc. is extremely small and a long life is maintained.

Figure 6 shows the edge roll gap measuring operation of the measuring device step by step using a side view of the device. In the initial state before the measurement is started, the device is in the same state as (A) .When the measurement is started in this initial state, the device goes through the state of (B) and the measuring sensor 10 is raised to the actual measuring position as much as possible. It leads to the state of (c). Subsequently, the gap measurement between the edge rolls 1 such as (d) is performed by the operation of the pneumatic cylinder 11 of the measuring sensor 10, and after the measurement is completed, the apparatus again passes through the states of (e) and (bar). It returns to the initial state (a). All of these measurement steps are made in less than a minute for quick measurements. Here, the measurement sensor 10 may display the distance between the current edger roll in real time when moving from the state of contacting the edger roll (1) to the position for edge roll adjustment, the edger roll ( 1) When the edger roll 1 pushes the sensor 13 while the sensor 13 is in contact with each other, if a pressure greater than a predetermined pressure is applied to the sensor 13 to prevent damage to the sensor 13, Only the cylinder arm 12 of the sensor moving pneumatic cylinder 11 is pushed back. Also, in order to prevent the problem that the roll gap is close to the gap allowed by the measuring device and the cylinder is broken in this process, as shown in FIG. 8, the maximum and minimum allowable positions of the edger roll 1 (Air) The switch sensor 40, 50 was installed to add a function to automatically send a warning signal when the edger roll is in contact. Figure 3 shows the configuration of the signal transmission system for transmitting a signal obtained through the measuring sensor 10 to the cab. The system 30 includes a programmable logic controller (PLC) 31 for controlling the operation of the transfer device 20 and the measuring sensor driven pneumatic cylinder 11 and a PC system 32 for controlling the PLC and processing measurement data. It is composed. The edger roll gap measuring device and the PLC 31 and the PC system 32 described above are connected by a communication and control cable to enable real time control. In addition, the operator (Local Panel) 33 was installed in front of the rolling stand in which the edger roll was inserted in order to enable the edger gap measurement while directly observing the eye. 9 is a flowchart illustrating edger roll gap measurement procedures using the apparatus of the present invention.

The device of the present invention described above can eliminate the problem of low measurement accuracy, poor operation efficiency, safety risks and the like by the conventional manual measurement, and can perform the edge measurement of edger roll quickly and easily with high reproducibility and measurement accuracy. It works. Table 1 below shows a comparison result of the edger roll gap measurement using the measuring device to which the present invention is applied and the conventional manual measuring means. As shown in Table 1, the present invention shows that the measurement time is faster and the measurement accuracy is higher than that of the conventional water measurement, and it is found that there is no problem in terms of configuration, safety, and maintenance.

TABLE 1

Comparison between manual measurement and roll interval measurement time and measurement error of the present invention

Claims (5)

Pneumatic distance measuring sensor 10, the telescopic feeder 20 for moving the measuring sensor 10 to the non-measurement position or edger position that can be spaced apart from the roll work place, and the measuring sensor ( Edger roll gap automatic measurement device using a pneumatic pressure, characterized in that it comprises a signal transmission system 30 for transmitting the measurement signal from the cab. 2. The measuring sensor (10) according to claim 1, wherein the measuring sensor (10) comprises a pneumatic cylinder (11), a cylinder arm (12), and a sensor (13) attached to an end of the cylinder arm (12). Automatic edger roll measurement using pneumatic pressure. 2. The telescopic hydraulic cylinder (21) according to claim 1, wherein the telescopic conveying device (20) is located at the center of the apparatus and on which the measuring sensor (10) is mounted and supported, and on both sides of the hydraulic cylinder (21). Arranged and configured to include a plurality of guide frames 22, 23, 24 installed to support the lifting operation of the measuring sensor 10 while moving up and down in accordance with the operation of the hydraulic cylinder (21) Edge roll gap automatic measuring device using pneumatic. The PLC system of claim 1, wherein the signal transmission system 30 controls the PLC 31 for controlling the operation of the hydraulic cylinder 21 and the pneumatic cylinder 11, and the PC system 32 for PLC control and measurement data processing. Edger roll gap automatic measuring device using pneumatic, characterized in that the configuration comprising. 3. The edger roll gap automatic measuring device according to claim 1 or 2, characterized in that the sensor (13) of the measuring sensor (10) is a sensor of a type incorporating a measuring signal converter.