KR100306591B1 - Apparatus for automatic measuring of gaps between edger rolls by using air pressure - Google Patents

Abstract

PURPOSE: An apparatus for automatic measuring of gaps between edger rolls by using air pressure is provided to achieve a high reliability and accuracy of measurement, while increasing safety for measuring process. CONSTITUTION: An apparatus comprises a distance measuring sensor(10) by using air pressure; a transfer unit(20) for transferring the distance measuring sensor to a non-measurement position spaced apart from the roll work site or a measurement position between edger rolls; and a signal transmission system(30) for transmitting the signal output from the distance measuring sensor to a control room. The distance measuring sensor includes a pneumatic cylinder, a cylinder arm, and a sensor attached to an end of the cylinder arm. The signal transmission system includes an PLC for controlling operation of the hydraulic cylinder and pneumatic cylinder.

Description

Edge roll gap automatic measuring device using pneumatic pressure

The present invention relates to an apparatus for automatically measuring the gap between edger rolls used in the ROUGHING MILL process of a steel mill, and compared to the manual measurement of the gap between edger rolls. 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 the step of primary rolling to finish milling the ingot heated to 1000-1100 ° C. in a hot rolling furnace as shown in FIG. 1. The 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. 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 edger roll gap automatic measuring device using the pneumatic of the present invention is for solving the problem of deterioration of measurement accuracy due to maintenance and vibration, and it is possible to measure the high precision and high safety as well as the advanced device with the easy maintenance. to be. In addition, in the present invention, the movement of the edger roll gap measuring device is performed by using a telescopic (for example, multi-stage retractable device such as an antenna of a car), but the non-measurement contracts the edger in the free space below. The instrument was designed to reach the actual measuring position by resting the hydraulic piston in the middle of the unit and raising it one step at a time when it was seated in the state. 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 pressure roughening machine is a roll for width rolling on the rolled material 3, while the horizontal roll 2 for 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 lot of water vapor and dust were generated. The maintenance of the device was difficult, and 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 1m), which is based on the width of the reference length 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, if the edge roll gap measurement instruction is issued, 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.

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

3 is a configuration diagram of a signal transmission system of the present invention.

4 is a configuration diagram 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 the measuring sensor as raised in the apparatus of FIG.

Figure 6 is a side view of the operation of the apparatus sequentially.

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

8 is a configuration diagram of the automatic warning means.

9 is a flow chart of the measuring step of the present invention.

* Explanation of symbols for 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.

4 is a schematic view showing the main configuration of the apparatus according to the present invention, where (a) is a plan view and (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. The guide frames 22, 23, and 24 are installed on both sides of the measuring sensor 10 and the hydraulic cylinder 21 installed as described above, so that the precise vertical lifting operation of the measuring sensor 10 and the hydraulic cylinder 21 is performed. It is. 4 (b) is a state in which the measuring sensor 10, which is lifted and lowered through the telescopic feeder 20, is lowered as much as possible to a non-measuring position, and in FIG. 5, the measuring sensor 10 is raised as much as possible to a measuring position. Show each state. 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. 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 1 attached to the cylinder arm 12 end. The sensor 13 moves forward or backward 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.

6 shows the edge roll gap measuring operation of the measuring device step by step using the 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. The state of (c) is reached. Subsequently, an operation of the pneumatic cylinder 11 of the measuring sensor 10 is performed to measure the gap between the edger rolls 1 as shown in (d), and after the measurement is completed, the device is again subjected to the states of (e) and (f). It returns to the state of (a) which is an initial state. 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 (d) in contact with 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 of the sensor 13 is applied to prevent the sensor 13 from being damaged. 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 allowable distance from the measuring device and the cylinder is broken, as shown in FIG. 8, the air at the maximum and minimum allowable positions of the edger roll 1 The switch sensor 40, 50 is installed to add an automatic warning signal when the edger roll contacts. 3 shows the configuration of a signal transmission system for transmitting a signal obtained through the measurement 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, in order to be able to measure the edge of the edge of the edge while observing the eye directly if necessary, a local panel 33 was installed in front of the rolling stand on which the edger was installed. 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.

Claims (4)

Pneumatic distance measuring sensor 10, the multi-stage retractable transfer device 20 for moving the measuring sensor 10 to a non-measured position that can be spaced apart from the roll work or the measuring position between the edger roll, and the measurement Edger roll gap automatic measurement device using a pneumatic pressure, characterized in that the configuration comprising a signal transmission system for transmitting a measurement signal from the sensor (10) to the cab. The method of claim 1, wherein the measuring sensor 10 is configured to include a pneumatic cylinder (11), a cylinder arm (12), and a cleaner (13) attached to the end of the cylinder (12). Edge roll gap automatic measuring device using pneumatic. The PC system 32 according to 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 PLC control and measurement data processing. Edger roll gap automatic measuring device using pneumatic, characterized in that the configuration comprising. The automatic edger gap measurement apparatus 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.