JPH0924420A - Roller leveler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically correct a sheet stock by automatically adjusting so as to always optimize the position of movable rolls to fixed rolls. SOLUTION: This device is composed of plural fixed rolls 3 juxtaposed in a fixed base 2 and movable rolls 6 arranged in the intermediate position of the interval of each fixed roll 3 and provided on a movable base 5 which can advance and retreat with respect to the fixed base 2. Adjusting means A adjusting the pushing amount of movable rolls 6 by displacing the movable base 5 are provided on at least two places. The sheet stock W fed is specified to be a roll stock and a control means B, changing the pushing amount of movable rolls 6 in correspondence to the roll diameter of the roll stock changing in accordance with the advancing process of the correcting work, is provided. The adjusting means A is controlled via the control means B. A displacement sensor 18 which measures the pushing amount of movable rolls 6 is also provided at the vicinity of the adjusting means A and the pushing amount of movable rolls 6 is slightly adjusted by the feedback from the output of the displacement sensor 18 to the control means B.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a roller straightening device.

[0002]

2. Description of the Related Art Generally, a cold rolled metal sheet material is distorted, and particularly a strip-shaped sheet material wound into a roll is curved. For this reason, since it cannot be used as a precision part if it is processed as it is, it is usually corrected before processing such as press working. Such distortion and curvature are generally corrected by using a roller correction device having a large number of rollers.

The roller straightening device is composed of a fixed roller in which a plurality of rollers are arranged at predetermined intervals, and a movable roller arranged in a position shifted by a half pitch from the pitch of the fixed rollers. The plate material to be straightened is flattened while being alternately deformed while passing between these rollers. However, in order to obtain the desired straightening of the plate material, the movable roller is always optimal with respect to the fixed roller. The condition is that they are located at regular intervals.

As for the position of the movable roller, a movable screw base for supporting the movable roller is provided with a moving screw mechanism for moving the movable base up and down. It is adjusted by rotating it manually.

[0005]

Since the distortion and the curvature of the roll material gradually change with the change of the roll diameter, the distance between the movable roller and the fixed roller follows the roll diameter of the roll material. It is required to change sequentially. Determining the straightened state of the straightened plate and adjusting the position of the roller with respect to the fixed roller correspondingly requires skill of the operator, and therefore, the straightening work of the plate is always inspected and adjusted. There is a problem that a skilled worker must be assigned to.

Therefore, an object of the present invention is to automate the adjustment work of a plate material using a roll material as a raw material by automating the adjustment for always making the position of the movable roller relative to the fixed roller appropriate.

[0007]

In order to achieve the above object, according to the present invention, a plurality of fixed rollers arranged in parallel on a fixed side base and a movable side provided so as to be movable back and forth with respect to the fixed side base. The base comprises a plurality of movable rollers disposed at an intermediate position between the fixed rollers, and at least two adjusting means are provided for adjusting the pushing amount of the movable rollers by displacing the movable side base. In the roller straightening device, the plate material to be supplied is a roll material, and a control means for changing the pushing amount of the movable roller is provided in accordance with the roll diameter of the roll material which changes as the straightening work progresses. Is configured to control the adjusting means.

Further, in the roller straightening device having the above structure, a displacement sensor for measuring the pushing amount of the movable roller is provided in the vicinity of the adjusting means, and the output of the displacement sensor is fed back to the control means to reduce the pushing amount of the movable roller. It is desirable to adjust.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The details of the present invention will be described below with reference to the preferred embodiments shown in the accompanying drawings. First, the configuration of the device will be described. As shown in FIGS. 1 and 2, floor 1
The fixed base 2 is fixed on the upper side. A plurality of fixed rollers 3 are pivotally supported on the fixed base 2 via roller mounting members 2a. At the four corners of the fixed-side base 2, adjustment shafts 4 which constitute adjustment means A for adjusting the pushing amount of each movable roller 3 described later are provided upright. These four adjusting shafts 4 are loosely fitted in the through holes 5b of the movable base 5 located above the fixed base 2. The movable base 5 is elastically supported by a compression spring 7 attached to the lower end of each adjustment shaft 4.

A plurality of movable rollers 6 are rotatably supported on the lower part of the movable base 5 via roller mounting members 5a. Each movable roller 6 is arranged at a position shifted by a half pitch from the arrangement pitch of the fixed roller 3, and the plate material W passing between the fixed roller 3 and the movable roller 6 can be alternately pressed and deformed. .

A collar 8 is attached to the upper part of the movable side base 5 in a state of being loosely fitted to each adjusting shaft 4, and a displacement gear 9 constituting an adjusting means A is located above each collar 8. ing. A spiral groove for a precision ball screw is provided on the inner peripheral portion of the shaft hole of each displacement gear 9, and the outer peripheral portion of the adjusting shaft 4 at the portion where the displacement gear 9 is screwed is used for the precision ball screw. A spiral groove is formed. The spiral groove provided on the outer peripheral portion of the adjusting shaft 4 and the spiral groove provided on the inner peripheral portion of the shaft hole of the displacement gear 9 are opposed to each other, and a passage formed by opposing both spiral grooves. A precision ball screw mechanism is constructed by interposing a hard sphere in the. Since the lower end portion of the adjusting shaft 4 is fixed to the fixed-side base 2 by the rotation of the displacement gear 9, the displacement gear 9 rotates via the collar 8 against the spring force of the compression spring 7. The movable base 5 is brought into contact with and separated from the fixed base 2 by an amount corresponding to the amount. Therefore, the pushing amount of the movable roller 6 can be adjusted by adjusting the displacement amount downward.

Nuts 10 are screwed onto the respective displacement gears 9, and these nuts 10 are attached to the motor mounting base 11
I support. The motor mounting base 11 is provided with mounting holes 11a provided at four corners. A fixing nut 12 is provided on the upper side of the motor mounting base 11 so as to be screwed into a screw portion formed from the upper end of the adjusting shaft 4 to a predetermined position. The motor mounting base 11 is fixed near the upper end of the adjusting shaft 4. ing. A cushion 13 is provided between each displacement gear 9 and the nut 10 in case the displacement gear 9 rises upward due to runaway.

Servo motors 14 (two shown) with built-in four encoders (not shown) are installed above the motor mounting base 11. An encoder signal cable 15 and a motor drive cable 16 for exchanging signals with a motor drive circuit 54 described later are connected to each servo motor 14.

The drive shaft 14a of each servomotor 14 penetrates through a through hole (not shown) provided in the motor mounting base 11 and projects to the lower side thereof, and the drive gear 1 is at the lower end thereof.
7 is rotatably attached integrally with the tapered pin 17a. The drive gears 17 are the displacement gears 9 described above.
And the servo motor 14 rotate so as to interlock with each other.

Displacement sensors 18 for detecting the amount of displacement of the movable roller 6 are provided outside the four corners of the movable base 5. The displacement sensor 18 is fixed to the displacement sensor mounting block 19 fixed to the movable base 5 by a fixing member 19a.
It is fixed by.

The displacement sensor 18 is, for example, a differential transformer type sensor in which an electromagnetic coil is installed vertically, a movable iron core is provided inside the electromagnetic coil, and a sensor head 18a is provided at the lower end of the movable iron core. Used.

Below the displacement sensor fixing block 19a, a detection plate 20 attached to the fixed base 2 is arranged. Sensor head 18a of the detection plate 20
A screw hole is provided at a position opposed to the screw hole, and a tapper 21 having a shaft portion screwed into the screw hole is screwed into the screw hole. 21 per degree is the sensor head 1 due to the thread
It is possible to adjust the zero point of 8a.

The main part of the roller straightening device is
It is covered with a cover 22 from the viewpoint of noise prevention and aesthetics.

Next, the structure of the control means B of the roller straightening device of the present invention will be described. As shown in FIG. 3, the controller B of the roller straightening device inputs various conditions such as the material, thickness, roll diameter and width of the plate material W to be straightened by the worker, and displays the status during the work. A personal computer (hereinafter referred to as "PC") 51 that is a system controller for
A storage circuit 52 having a program for determining the pushing amount of the movable roller 6 based on various conditions input by
A central control unit (hereinafter referred to as "CPU") 53 for operating the roller straightening device based on the processing result of the storage circuit 52.
And The CPU 53 is connected to the motor drive circuit 54 and the displacement sensor 18. The CPU 53 and the motor drive circuit 54 are different from the CPU 53 in the motor drive circuit 54.
A signal is exchanged in both directions for instructing the drive amount of the servo motor 14 to the CPU and the completion of the drive of the servo motor 14 from the motor drive circuit 54 to the CPU 53.
The PU 53 and the displacement sensor 18 are configured so that the current measurement value of the pressing amount of the movable roller 6 is sent from the displacement sensor 18 in one direction. The motor drive circuit 54 and the servomotor 14 are connected by an encoder signal cable 15 and a motor drive cable 16.

A plate material W to be straightened by the roller straightening device of the present invention
Is a roll material, the diameter of the roll material changes as the straightening operation progresses. Therefore, in order to always correct the plate material W appropriately, it is necessary to change the pushing amount of the movable roller 6 in accordance with the diameter of the roll material (see FIG. 5). Therefore, the memory circuit 52 stores a program for changing the pushing amount of the movable roller 6 in accordance with the changing roll diameter of the roll material.

In this embodiment, the pushing amount of the movable roller 6 corresponding to the changing roll diameter is such that the plate material W is straightened and then sent to a pressing machine (not shown) to be pressed. Because of the configuration, it is determined based on the number of presses output from the press machine. However, the pushing amount of the movable roller 6 is not limited to this, but can be determined by measuring the diameter or weight of the roll material, the feed amount of the roll material, or the like.

Next, the operation of the roller straightening device of this embodiment will be described with reference to the flow chart shown in FIG. More specifically, the control unit B adjusts the pushing amount of the movable roller 6, that is, the control unit B controls the adjustment unit A. Since the adjustment means A at four locations are similarly processed in parallel, the "axis 1, 2, 3, 4" in FIG. 4 will be referred to as "axis n".

First, when various conditions of the roll-shaped plate material W to be corrected are input from the PC 51, the optimum pushing amount of the movable roller 6 at the present time is calculated using the program of the memory circuit 52 based on the data. That is, the drive amount of each servo motor 14 is calculated, and the set value which is the calculation result is input to the CPU 53 (set value input). On the other hand, the current position of the movable base 5, that is, the pushing amount of each movable roller 6 is measured by each displacement sensor 18, and the CPU 53 acquires the measured value (axis n measured value acquisition). Therefore, the CPU 53 calculates the difference between the set value of the axis n and the measured value (calculates the difference between the set value of the axis n and the measured value). The calculated difference is pulse-converted (difference → pulse conversion), and a pulse is output from the CPU 53 to each motor drive circuit 54 to adjust each adjusting means A, and the servo motor 14 of the axis n is driven (axis n). The amount of pushing of the movable roller 6 is adjusted by moving the servo motor). Each servo motor 14
When the drive is completed, the encoder built in the servo motor 14 confirms the completion and the encoder signal cable 15 notifies the completion to each motor drive circuit 54 (axis n positioning completion).
The completion of driving of No. 4 is notified to the CPU 53 (4 axis positioning is completed). The pushing amount of the movable roller 6 is measured by the respective displacement sensors 18 even after the positioning of the four axes is completed.
3 acquires the measured value again (axis n measured value acquisition), CP
In U53, the difference between the set value of axis n and the measured value is calculated (the difference between the set value of axis n and the measured value is calculated). The absolute value of the difference between the set value and the measured value is 0.01 mm or less (| (set value)
If-(measured value) ≤0.01 | If the difference between the set value and the measured value falls within 0.01 mm or less in absolute value, the adjustment of the adjusting means A is performed again when the roll diameter changes as the correction work of the roll-shaped plate W proceeds. The process is temporarily ended until the PC 51 determines to change the set value. As shown in FIG. 5, the setting is changed by automatically setting the pushing amount of the movable roller 6 corresponding to the roll diameter that changes as the correction work of the supplied plate material W progresses.

The movable roller 6 by the displacement sensor 18
Is constantly measured, and when the difference between the set value and the measured value becomes 0.01 mm or more in absolute value during the correction work, the pushing amount of the movable roller 6 is corrected according to the above-mentioned flowchart. .

These operations are performed in response to changes in the pushing amount for any adjusting means A, and the pushing amount can be automatically adjusted for each adjusting means A, and the correction work of the plate W in the roll shape is performed. Is automated.

The displacement gear 9 is rotated by the drive of the servomotor 14 and the adjusting means A adjusts the pushing amount of the movable roller 6. Specifically, when the displacement gear 9 rotates to the right, the displacement gear 9 is rotated. Is lowered along the adjusting shaft 4, the movable side base 5 is lowered against the compression spring 7, and the pushing amount of the movable roller 6 located near the adjusting shaft 4 is increased. On the contrary, when the displacement gear 9 rotates counterclockwise, the displacement gear 9 rises along the adjustment shaft 4, so that the movable base 5
Is raised by the compression spring 7, the pushing amount of the movable roller 6 located near the adjustment shaft 4 is reduced.

Regarding the correction of the displacement of the movable roller 6 during the correction operation, the specific description is as follows. When any one corner of the movable side base 5 is displaced, this displacement raises and lowers the sensor head 18a, and the raising and lowering of the sensor head 18a raises and lowers the iron core integrated with the sensor head 18a to displace the coil constituting the displacement sensor 18. Generate an electromotive force corresponding to the quantity. This electromotive force is digitally converted and fed back to the control means B, and the control means B receiving this electromotive force drives the command signal necessary for returning the pushing amount at that location to the set value corresponding to this displacement amount. Output to the circuit 54, the motor drive circuit 54
Outputs a drive command to the servomotor 14 via the motor drive cable 16. The rotation of the servo motor 14 causes the displacement gear 9 to rotate through the drive gear 17 by a necessary rotation angle. The rotation of the servo motor 14 is confirmed by the encoder of the servo motor 14, and the completion is transmitted to the motor drive circuit 54 by the encoder signal cable 15.

The roll-shaped plate material 6 is fed into a loading port M opened on the front side of FIG. 1 using a guide (not shown), and the plate material W is fed from the left side of FIG. 2 to the fixed roller 3 and the movable roller. Enter between 6 and. Plate material W that has entered here
Is advanced while being deformed by being alternately pressed by the upper and lower fixed rollers 3 and the movable roller 6, and is flat when coming out from the right side of FIG.

Here, when the plate material W advances between the fixed roller 3 and the movable roller 6, the depth, that is, the pressing amount, by which one roller is pushed into the concave portion between the other adjacent rollers is the inlet side. Is set to be large, and becomes smaller as it gets closer to the exit side. Therefore, it is necessary to independently set the pushing amounts by the adjusting means A provided at the four corners. In particular, care must be taken when setting the pushing amount on the inlet side and the outlet side.

In this embodiment, the pushing amount of the movable roller 6 is automatically adjusted at four points, but it may be automatically adjusted at two points on the inlet side and the outlet side. . If the pushing amount of the movable roller 6 is automatically adjusted at two places, the structure is simplified and the cost of the device is reduced.

[0031]

According to the present invention, since the pushing amount of the movable roller corresponding to the roll diameter which changes with the progress of the straightening work of the supplied plate material is calculated by the control means, the adjusting means is controlled. The amount of pushing of the movable roller is always changed automatically without requiring skill.

Further, since the displacement sensor for detecting the displacement amount of the movable side base is provided at four places, the adjusting means is used by the control means on the basis of the detection data of the displacement amount of the movable side base by this displacement sensor. The pushing amount of the movable roller can be automatically adjusted, and the pushing amount can be accurately maintained.

[Brief description of drawings]

FIG. 1 is a partial sectional side view of an embodiment of a roller straightening device of the present invention.

FIG. 2 is a partial sectional front view of an embodiment of the roller straightening device of the present invention.

FIG. 3 is a block diagram showing a configuration of control means of the roller straightening device of the present invention.

FIG. 4 is a flowchart showing a flow in which the control means adjusts the pushing amount of the movable roller.

FIG. 5 is a diagram showing a relationship between a radius of a roll material supplied and a pushing amount of a movable roller.

[Explanation of symbols]

 2 Fixed Side Base 3 Fixed Roller 5 Movable Side Base 6 Movable Roller 18 Displacement Sensor A Adjusting Means B Control Means W Plate Material

Claims (2)

[Claims] 1. A plurality of fixed rollers arranged side by side on a fixed side base, and a movable side base provided so as to be movable back and forth with respect to the fixed side base, at an intermediate position between the fixed rollers. In a roller straightening device having at least two adjusting means for adjusting the pushing amount of the movable roller by displacing the movable side base, the plate material supplied is a roll. A control means for changing the pushing amount of the movable roller corresponding to the roll diameter of the roll material which changes as the correction work progresses, and is configured to control the adjusting means via this control means. A roller straightening device characterized by the above. 2. The roller straightening device according to claim 1, wherein a displacement sensor for measuring the pushing amount of the movable roller is provided in the vicinity of the adjusting means, and the output of the displacement sensor is provided to the control means. A roller straightening device characterized by finely adjusting the pushing amount of the movable roller by feedback.