JPS60170515A - Nipping pressure control equipment - Google Patents

Abstract

PURPOSE:To enhance the operability and reliability of a titled equipment by providing an input unit such as a keyboard and a CRT display unit to a hydraulic unit control system and performing data processing by furnishing the system with an electric pressure-transducer for detecting a shoe pressure and a roll pressure. CONSTITUTION:In a nipping pressure control equipment for controlling a crown; a control device for controlling a hydraulic pressure unit is provided with an input unit 17 such as a keyboard used for inputting each set value necessary for operation, a CRT display unit 18 for displaying all inputted set values, and a CPU16 for receiving commands outputted from the unit 18 and transferring the data to the unit 18. Further, an electric pressure transducer 13 for detecting both of a shoe pressure and a roll pressure and outputting them to the CPU16 is provided to said control device. In this way, the constitution of the pressure control device is made simple, and its operability and reliability are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a crown control (OCR) nip pressure control device.

FIGS. 1 and 2 show a CCH nip pressure control system using conventional air components and a 1-loop controller, respectively. Here, CCR (Crown Control No. 1)
To explain an example with reference to FIGS. 4 and 5, a cylindrical cell 01 is rotatably supported by a bearing 05 around a center shaft 04 which is fixed so as not to rotate by some method (not shown). In this roll structure, a fluid pressure chamber 03 and a shoe device 02 for crown adjustment are provided in the direction facing the mating roll 06 forming the nip. A conduit 07 that can supply fluid pressure is led to the fluid pressure chamber 03, and the crown can be changed by adjusting this fluid pressure. In addition, F
indicates roll front and B indicates roll bank.

In FIGS. 1 and 2, the linear pressure setting device 1-a allows
The nip pressure of the OCR is determined by setting the crown amount using the crown amount setting device 1-b, and then inputting a pressure command to control the relief amount of the OCR shoe oil pressure line to determine the shoe oil pressure. Further, the opening degree of the control valve 5 is controlled by the opening degree signal from the regulator 2 or the one-loop controller 15, and the shoe oil pressure is set as set.

At the same time, the oil pressure of roll R (front F and pack B) is also determined by controlling the amount of relief. The opening degree of the electromagnetic proportional valve 10 is controlled by an opening signal calculated by the calculator 3, the ratio setting device 6, or the one-loop controller 15 so that the rise is balanced, and the roll oil pressure is set as set. Balance adjustment between front F and hack B of roll hydraulic pressure is done using FR.
This is done using fine adjustment 11J7-d and BK fine adjustment 7-C.

The shoe hydraulic pressure is of a feed hack type using a pneumatic pressure transducer 4 or an electric pressure transducer 13, and the roll hydraulic pressure is of an open loop type using an amplifier 9 and an electromagnetic proportional valve 10. Also, since both systems are air and electricity mixed systems, air-electric converters 8.11 are used. In addition,
In the figure, 1 is a pressure reducing valve, 7 is a bias relay, 12 is a distributor, and 14 is an electro-pneumatic converter.

However, according to the conventional control device shown in FIGS. 1 and 2, the roll oil pressure is controlled in an open-loop manner, and the electromagnetic proportional valve 10 has different characteristics. The disadvantage was that it required adjustment, which was time-consuming. In addition, since there is no alarm (warning in case of excessive deviation between roll oil pressure and shoe oil pressure), there is a drawback that a failure of the control unit can cause the oil pressure to become unbalanced, causing excessive nip pressure to be applied to a part of the OCR, often causing damage to the roll. there were. In addition, there are many control units, which makes adjustment troublesome, and the probability of failure is also high.If you want to change the crown amount, you need to spread out the diagram to get a guide, which has the disadvantage of requiring more time and effort. Ta.

The present invention has been proposed in order to eliminate the above-mentioned conventional drawbacks, and includes a control device that controls a hydraulic unit, and adjusts the crown by supplying an excessive amount of pressure oil from the hydraulic unit to the shoe device of the crown control. In the nip pressure control device, the control device includes an input device such as a keyboard for inputting various setting values necessary for operation, a CRT display device for displaying all the input setting values, and a command from the display device. a computer for receiving, processing, and transmitting data to the display device, and an electric pressure transducer for detecting both shoe hydraulic pressure and roll hydraulic pressure and inputting the detected pressure to the computer,
Crown control nip pressure control reduces the number of control units to simplify the configuration, improves operability, issues an alarm to prevent roll damage, and stops the oven loop to improve controllability. The aim is to provide the equipment.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 shows one embodiment of the present invention. Further, since the configuration, operation and effect of the crown control (OCR) are as explained in FIGS. 4 and 5, the explanation will be omitted here.

First, in Fig. 3, 5 is a control valve, 9 is an amplifier, 10 is an electromagnetic proportional valve, 13 is an electric pressure transducer, and 14
1 is an electro-pneumatic converter, 16 is a computer main body, 17 is an input device such as a keyboard, and 18 is a CRT display device.

Next, the operation of the embodiment shown in FIG. 3 will be explained. Various set values necessary for operation are inputted using an input device 17 such as a keyboard. Next, all input setting values are displayed on the CRT display device 18. In addition, the CRT display device 18 also displays graph measurement values, nip pressure distribution, crown status (over-crown and less-crown), etc. to improve the construction performance.

Conventional calculations are processed by software in the computer main body 16 and output. Also, front F and back B
The balance adjustment of the roll R is also input to the computer main body 16 from an input device 17 such as a keyboard. Furthermore, since both the shoe hydraulic pressure and the roll hydraulic pressure are of the feedbank type, differences in the characteristics of the electromagnetic proportional valve 10 pose no problem in use. In addition, the electric pressure transducer 13 detects both the shoe and roll oil pressures, so you can always check for deviations and prevent damage to the rolls.
A warning is issued, and if the allowable value is exceeded, the crown amount is automatically set to the open state (.Furthermore, the amount of crown can be easily changed while driving by looking at the CRT display device 18.

The present invention is constructed as described above in detail, and the CR
T-display device improves operability,
Feedback system simplifies on-site adjustment, all-electric system reduces the number of parts, and an electric pressure transducer is installed to detect both shoe oil pressure and roll oil pressure, and to issue an alarm if deviation is large. This has effects such as being able to prevent damage to the rolls due to heat generation.

[Brief explanation of the drawing]

Figures 1 and 2 are control circuit diagrams of a conventional crown control nip pressure adjustment device, Figure 3 is a front sectional view of the roll, and Figure 5 is an explanation of the main parts of the A-A connection in Figure 4. - Cylindrical cell 02 - Shoe device 03 - Fluid pressure chamber 04 - Center shaft 5 - Control valve 13 - Electric pressure transducer 1, v-'its, air transducer 16 - Computer body 17 - Keyboard, etc. Input device 18 - CRT display device Mitsubishi Model & Industry Co., Ltd. Figure 1 Figure 3

Claims (1)

[Claims] In a nip pressure control device that has a control device that controls a hydraulic unit and adjusts the crown by sending pressure oil from the hydraulic unit to a shoe device of the crown control, the control device has various settings necessary for operation. It has an input device such as a keyboard for inputting values, a CRT display device for displaying all the input setting values, and a computer for receiving and processing commands from the display device and transmitting data to the display device. , and an electric pressure transducer that detects both shoe oil pressure and roll oil pressure and inputs them to the computer.