JPS62148001A - Edger device - Google Patents

Abstract

PURPOSE:To permit free adjustment of width accuracy by feeding a working fluid of the amt. controlled by a servocontrol valve to a screw-down cylinder for moving a vertical roll thereby simultaneously executing the position control and screw-down control of the vertical roll. CONSTITUTION:A switch 19 is changed over to the position control in the stage of passing a rolling sheet 1. The vertical roll 3 is advanced at a high speed by using the cylinder 4 and the switch is changed over to the low-speed advance when the roll moves near to the sheet 1 to make the position control. The oil flow control signal from a comparator 15 is fed to the servocontrol valve 11 during such time when the reduction is not executed. The switch 19 is changed over by the signal from a load cell 18 and rolling is started upon contact of the roll 3 with the sheet 1. The oil flow control signal from the comparator 16 is fed to the valve 11 during such reduction by which the pressure in the cylinder 4 is controlled to maintain the specified rolling force on the sheet 1. The fluctuation of the rolling force is obviated by such mechanism even if the sheet 1 meanders and the generation of buckling, etc. is obviated even in the case of a thin sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an edging device used to reduce the width of a rolled plate on the downstream side of a rolling line.

[Prior Art] Conventionally, in metal rolling, in order to trim the rolled plate to a predetermined width dimension, a trimmer was installed downstream of the rolling line to straighten the width ends of the rolled plate. For this reason, there was a problem that the yield was low.

Therefore, it is currently being considered to provide an edger device on the downstream side of the rolling line to reduce the width of the rolled plate using vertical rolls to adjust the width dimension.

However, because the conventional edge saw equipment was designed with the assumption that thick plates would be rolled down in width, and the rolled plate becomes thinner as it progresses downstream, it was not possible to install the conventional edge saw equipment directly on the downstream side of the rolling line. In this case, there is a problem in that the rolled plate buckles due to width reduction, making it impossible to achieve the desired results.

[Problem to be Solved by the Invention 1] The present invention has been made in order to solve the problems in width reduction of a thin plate using an edger device.

[Means for Solving the Problems] In the present invention, vertical rolls sandwiching a rolled plate and facing each other in the width direction of the plate, a reduction cylinder that moves the vertical roller in the width direction of the plate, and a roll that is sent to the reduction cylinder. A valve that controls the amount of hydraulic oil;
When the vertical rolls are not rolling down the rolled plate, a required oil amount control signal is sent to the above valve to move the vertical rolls to a predetermined position, and when the vertical rolls are rolling down the rolled plate, the oil pressure in the rolling cylinder is A control section is provided for sending a required oil amount control signal to the valve so as to keep the amount constant.

Further, in the present invention, vertical rolls sandwiching a rolled plate and facing each other in the plate width direction, a reduction cylinder that moves the vertical roll in the plate width direction, and a valve that controls the amount of hydraulic oil sent to the reduction cylinder, When the vertical roll is not rolling down the rolled plate, the required oil amount control signal is sent to the above valve to move the vertical roll to a predetermined position, and when the vertical roll is rolling down the rolled plate, the pressure in the rolling cylinder is sent. and a III control unit that sends a required oil amount control signal to the valve based on the position of the vertical roll.

[Function] During width reduction, the reduction force is controlled to be constant (that is, pressure control is performed), or position control and pressure control are performed simultaneously, so even if meandering occurs in the rolled plate, the reduction blade will not move. All (or only slightly) changed.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows the present invention, in which vertical rolls 3 are attached to opposite ends of a pair of frames 2 that sandwich a rolled plate 1 and face each other.
(The frame and vertical roll on one side are not shown), and the piston 0 of the reduction cylinder 4 whose axis is directed in the width direction of the plate is attached to the opposite end of the frame 2.
The tip is connected to the rod side hydraulic chamber 6 of the reduction cylinder 4.
Then, the oil in the accumulator (not shown) is guided through the oil passage 1 to apply a constant pressure in the direction of shortening the iron to the piston 8, and the oil is fed into the head side hydraulic chamber 1° from the oil pressure source (not shown) through the oil passage 9. A servo valve 11 controls the amount of oil that is applied, and by controlling the amount of oil, the piston 8 is actuated to move the vertical roll 3 in the width direction of the sheet.

When the vertical roll 3 is not rolling down the rolled plate 1, such as when the vertical roll 3 is advanced from the standby position to the width rolling position by the rolling cylinder 4, the position control is performed.
A control section is provided for controlling the pressure when the rolled plate 1 is being rolled down.

Specifically, a setting device 12 that issues a position setting signal and a pressure setting signal, a position detector 13 that detects the position of the piston 8, an oil pressure gauge 14 that measures the oil pressure in the head side hydraulic chamber 1o, and a setting device Position setting signal from 12 and position detector 1
between the frame 2 and the vertical roll bearing 17; A load cell 18 is interposed to detect the presence or absence of rolling plate rolling by the vertical rolls 3, and the output circuits of comparators 15 and 16 are selectively connected to the input circuit of the servo valve 11 by switching according to a signal from the load cell 18. When the vertical rolls 3 are not rolling down the rolling plate 1, an oil soaking control signal from the comparator 15 is sent to the servo valve 11, and the vertical rolls 3 are rolling the rolling plate 1.
A switch 19 is provided which sends an oil amount control signal from the comparator 16 to the servo valve 11 when the pressure is being reduced.

When a rolled plate is width-reduced by an edger device equipped with a control section configured as described above, the reduction cylinder 4 is shortened and the vertical roll 3 is moved to the standby position before passing the plate between the two vertical rolls 1. The rolled plate 1 is passed between both vertical rolls 3 in this state.

During this time, since the vertical rolls 3 do not roll down the rolled plate, the switch 19 is switched to the final position where position control is performed. When the rolled plate 1 is passed through, the vertical roll 3 is moved forward at high speed at first, and when it approaches the rolled plate 1, it is switched to low speed forward movement. When the vertical roll 3 contacts the rolling plate 1 and rolling starts, the load cell 1
A switch 19 is switched by a signal from 8. Thereafter, the servo valve 11 controls the pressure within the rolling cylinder 4 so that the rolling blade relative to the rolled plate 1 remains constant.

In this way, the rolling blade is controlled to be constant during width rolling, so even if meandering occurs in the rolled plate 1, the rolling blade will not fluctuate.
Therefore, there is no risk of buckling even in the case of a thin plate.

FIG. 2 is equipped with a control unit that performs position control when the vertical rolls 3 are not rolling down the rolled plate 1, and simultaneously performs position control and pressure control when the vertical rolls 3 are rolling down the rolled plate 1. This shows an edger device that is switched by a signal from a load cell 18, and connects the output circuit of one comparator 15 to the input circuit of the servo valve 11 when the pressure is not lowered, and connects the output circuit of one of the comparators 15 to the input circuit of the servo valve 11 when the pressure is lowered. A switch 20 is provided to connect the output circuits of both comparators 15 and 16, and the position setting signal from the setting device 12 and the position detection signal from the position detector 13 are connected to the comparator 1.
5, the pressure setting signal from the setting device 12 and the oil pressure detection signal from the oil pressure gauge 14 are compared by the comparator 16, and the oil amount control gains α and β output from both comparators 15 and 16 are compared with the servo control signal. It is sent to the valve 11 to perform position control and pressure control at the same time.

In the above configuration, in the case of a relatively thick plate, α is increased and β is decreased, and width reduction is performed with emphasis on width accuracy. On the other hand, in the case of a relatively thin plate, α is made small and β is made large, and the width is reduced with an emphasis on preventing buckling. By appropriately adjusting α and β in this manner, width accuracy can be freely adjusted.

[Effects of the Invention] As described above, according to the present invention, the rolling blade is controlled to be constant during rolling (D I!), so even if meandering occurs in the rolled plate, the rolling blade does not fluctuate. There is no risk of buckling even in the case of thin plates. (n) Position control and pressure control are performed simultaneously during width reduction, so width accuracy can be adjusted freely. Since the problem with width reduction can be solved, it becomes possible to adjust the width dimension of the rolled plate by width reduction on the downstream side of the rolling line, and it is possible to achieve an excellent effect of improving the yield.

[Brief explanation of drawings]

FIGS. 1 and 2 are front views showing essential parts of the edger device according to the present invention. 1 is a vertical roll, 3 is a vertical roll, 4 is a reduction cylinder, 11
is a servo valve, 12 is a setting device, 13 is a position detector, 14 is an oil pressure gauge, 15.16 is a comparator, 18 is a load cell, 19
．． 20 indicates a switch.

Claims (1)

[Claims] 1) Vertical rolls sandwiching a rolled plate and facing each other in the width direction of the plate, a reduction cylinder that moves the vertical roll in the width direction of the plate, and controlling the amount of hydraulic oil sent to the reduction cylinder. When the vertical roll is not rolling down the rolled plate, the required oil amount control signal is sent to the valve to move the vertical roll to a predetermined position, and when the vertical roll is rolling down the rolled plate, it is sent to the rolling cylinder. An edger device comprising: a control unit that sends a required oil amount control signal to the valve to keep the oil pressure within the edger constant. 2) Vertical rolls that sandwich the rolled plate and face each other in the width direction of the plate, a reduction cylinder that moves the vertical roll in the width direction of the plate, a valve that controls the amount of hydraulic oil sent to the reduction cylinder, and a vertical roll that When the rolled plate is not being rolled down, the required oil amount control signal is sent to the above valve to move the vertical roll to a predetermined position, and when the vertical roll is rolling down the rolled plate, the pressure inside the rolling cylinder and the vertical roll are sent. An edger device comprising: a control unit that sends a required oil amount control signal to the valve based on the position of the valve.