JPS5942134A - Thin sheet corrugating device - Google Patents

Abstract

PURPOSE:To corrugate accurately a sheet to required height of corrugation in the direction of length and width of the sheet by detecting the height of corrugation formed on a thin sheet on both sides of the sheet and controlling a rolling reduction device by feeding back the signal. CONSTITUTION:A thin sheet 1 is pressed against the surface of a grooved roll 5 by high-pressure water jet spouted from a high-pressure water jetting nozzle 42 and plastically deformed in conformity with the grooves. The thin sheet passed out from a corrugating member, i.e. corrugated sheet, is held lightly by pressing rolls 46 and vibration is absorbed. In a state of no vibration, the height of corrugation of the sheet 2 is detected by a wave height detector 33. The detected signal is fed back to a controlling device 35, and rolling reduction or rolling load is regulated basing on deviation from the target value. Regulation of rolling load is done by regulating the pressure of high-pressure water jet spouted from the high-pressure water jetting nozzle 42, the position of the nozzle and the position of rolls. The pressure of high-pressure water supplied to the nozzle 42 is regulated by a pressure regulating valve 44.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thin plate corrugation apparatus for forming relatively small and uniform wave waves on a thin metal plate.

Waves with relatively small pitch and height and uniformity may have to be fabricated into sheet metal. for example,
In the production of grain-oriented silicon steel sheets, it has been proposed to make the crystal axis of the steel at a specific angle with respect to the rolling surface in order to improve the magnetic properties (see Japanese Patent Application Laid-open No. 40223/1983). For this purpose, corrugations extending in a direction intersecting the rolling direction are formed on the steel sheet during the manufacturing process. The pitch of this waveform is, for example, low, and the wave height is relatively small, f1100 μm.
In order to obtain the required magnetic properties, these dimensions must be accurate and uniform not only in the lengthwise direction of the plate but also in its widthwise direction. If it is not uniform, for example, the iron loss factor of a silicon steel sheet will vary in the rolling direction and the sheet width direction, and an effective reduction in the iron loss factor will not be achieved.

Traditionally, in the production of roof panels, corrugated pipes, etc., it has been widely used to corrugate thin sheets using a press.
Waves are large, ranging from several to several dozen waves in height, and do not require high precision due to their purpose.

Therefore, conventional techniques cannot be applied to such special applications as described above, and it is necessary to develop a completely new wave processing technique.

The present invention was made in response to the above-mentioned needs, and it is an object of the present invention to provide a thin plate corrugation device capable of forming small corrugations with high precision and uniformly in the longitudinal and width directions of the plate. .

The thin plate corrugation processing apparatus of the present invention is comprised of a corrugating member, a rolling device, a thin plate support member, a wave height detector, and a control device.

The corrugated members are paired, and pressure is applied from both the front and back of the thin plate. The corrugated roll is a grooved roll in which at least one of the members has a large number of grooves extending in the roll axis direction and is rotationally driven.

In the rolling down device, at least one corrugation is connected to a drive side and a work side of the member, respectively, and the corrugation applies a load to press the thin plate against the member. pressed 1
This thin plate has a corrugated shape that follows the grooves of the grooved roll.

The height of the waves changes depending on the size of the rolling blade.

The sheet support member is adjacent to the exit side of the corrugated member and supports the corrugated sheet.

The wave height detector consists of a pair and is located near the thin plate support member and near the side edges of the corrugated thin plate drive side and work side! They are arranged so as to face the surface of the corrugated thin plate, respectively. These wave height detectors detect the height of waves formed in the thin plate.

The control device controls each of the rolling down devices based on the signal from the wave height detector, and adjusts the force for pressing the thin plate against the grooved roll or the position of the serration, thereby maintaining the height of the waves at a predetermined height.

As described above, in the sheet corrugation processing apparatus of the present invention, the height of the corrugation formed on the sheet is detected on both sides of the sheet, and the signals are fed back to control the respective rolling down devices. Therefore, it is possible to accurately wave the required wave height not only in the longitudinal direction of the plate but also in the width direction of the plate.

! In a thin plate that has been corrugated, the corrugation is slightly vibrating up and down immediately after the part gold plate due to the vibration of the corrugation device itself or the corrugation. For this reason, it is not possible to accurately detect the entire wave height. In this invention, since the corrugated thin plate is fully supported at the position where the wave height is detected, minute vibrations of the thin plate are absorbed by contact with the supporting member. Therefore, errors in wave height detection due to vibration do not occur.

According to the device of the present invention, the pulse height precision # is, for example, 15 μm and 8 degrees, although it also depends on the precision of the pulse height detector.

Examples of the present invention will be described below.

FIG. 1 is a perspective view showing the main parts of the apparatus of the present invention.

As shown in the drawing, the corrugated member 4 is a pair of upper and lower rolls 5,
It consists of 7. Grooves 11 extending in the roll axis direction are cut at equal pitches on the surface of each roll 5, 7. The rolls 5.7 are arranged so that the peaks 12 of the opposing rolls enter the grooves 11, as shown in FIG. The height l of the crests of the rolls 5 and 7] and the pitch Pfl are determined by the required dimensions of the corrugated sheet. For example, if the maximum height of a corrugated sheet with a thickness of 10 mm is 200 μm and the pitch is 4 mm, the height of the crest of the roll 5゜7 is 300 μm, and the pitch P u
4 mn.

The rolls 5 and 7 are connected to the chock 16 via bearings 14 and 15.
．． It is supported by 17. The upper chock 16 is fixed to a stand (not shown) and the lower chock 91°
17 is attached to the stand so that it can be raised and lowered freely.

Chock 16. A roll shaft 6.8 [protruding from the roll shaft 17] is connected to an electric motor (none of which is shown) via a shaft coupling, a speed reducer, etc., and the rolls 5 and 7 are rotationally driven.

The lower chock 17 on the side from which the roll shafts 6 and 8 protrude, that is, the drive side and the work side opposite thereto.
A lowering device 21 is connected to each. That is, the rod n of the hydraulic cylinder 22 is connected to the lower chock 17.
A hydraulic pump is connected to the cylinder 22 through a servo valve 24. On the exit side of the rolls 5, 7, a support roll 31 is arranged at the same level as the lower roll 7 and adjacent to these rolls 5, 7. The support roll 31 is fixed to a frame (not shown) and supports the thin plate 2 corrugated by the rolls 5 and 7 in a downward direction. On the exit side of the support roll 31, the course of the corrugated sheet 2 is changed so that it is directed downward by several positions or more.

Wave height detectors 33 are arranged near the support roll 31 and near the plate side ends of the drive side and work side so as to face the surface of the corrugated plate 2, respectively. As the wave height detector 33, a commonly used electric (including magnetic), ultrasonic, or optical plate-shaped detector is used. In addition, there is a load meter 34 such as a load cell that detects the entire reduction load between the housing and the chock 16, or a reduction amount (
A position meter, etc., that detects the celsin position) is installed.

The control device 35 is composed of a control computer, and the input side is connected to the wave height detector 33 and the load cell 34, and the output side is connected to the drive side and work side servo valves 24, respectively.

In this embodiment, the thin sheet 1 supplied to the corrugating device has a coiled shape, and the thin sheet 1 is unwound from an uncoiler (1 not shown), and the corrugated sheet 2 that has been corrugated is sent to the coiler (1).
(not shown) [taken up. Note that a tension of about 1 to 10 KR' is applied to the thin plate 1 and the corrugated plate 2 by an uncoiler and a coiler depending on the material.

Next, the operation of the wave processing device configured as described above will be explained.

First, target values for the height and pitch of the corrugation for the plate thickness and material are set in the setting section of the control device 35, and the required rolling reduction amount (load or cercin position) is set in accordance with these values and corrugation speed. Calculated by the calculation unit.

The thin plate 1 is fed between rolls 5 and 7, where the roll groove 1
A waveform is formed by undergoing plastic deformation so as to bite into 1. The wave machining speed is, for example, 100 to 300 m4m.

The thin plate or corrugated plate 2 from the rolls 5 and 7 is the supporting roll 3.
1 is supported from below. When the corrugated sheet 2 comes into contact with the support roll 31, minute vibrations applied to the corrugated sheet 2 during processing are absorbed. The wave height detector 33 continuously detects the height of the wave on the corrugated plate 2 in a state where the vibration has disappeared. This detection signal is sent to a comparison section of the control device 35, where it is compared with a target value. Based on the deviation between the detected value and the target value, a required reduction amount (load or celsin position) is determined by the calculation section, and the result is outputted to the servo valve 24 in the case of hydraulic pressure reduction. The hydraulic cylinder 22 is operated by opening and closing of the servo discrimination, and the gap between the zero fulls 5 and 7 is set to the required value.

Here, the above control will be explained in more detail.

FIG. 3 shows an example of variations in the height of waves formed on a corrugated plate 2 having a width of 3 (10 cm) and a thickness of 0.3 mm.

FIGS. 3(a) to 3(d) respectively represent wave heights λ at points (a) to (d) in the perspective view of the corrugated plate 2 shown in the figure. 10μ0 in the board width direction from Figure 3 (A) to (C)]
It can be seen that there is a difference in the height of the waves. Furthermore, it can be seen from FIGS. 3(b) and 3(d) that there is a difference in wave height of 15 μm in the longitudinal direction of the plate.

Wave height control consists of three steps. The first is to remove variations in the height of waves in the longitudinal direction of the plate, the second is to remove variations in the width of the plate, and the third is to adjust the average height of the waves.

FIG. 4 shows an example of a flowchart of wave height control. As shown in the drawing, first, the constants δO and a that determine the required wave height λ0 and the rolling reduction amount δ of the grooved roll are
Set f steps.

Corrugation is started with the above set values, and in the first step, a wave height detector detects the maximum value λ bait and the minimum value λ min of the wave height changing in the rolling direction. The maximum and minimum wave values λSO and λmin may be directly detected by a wave height detector placed on the center line of the board width, but the wave heights λD (drive side) and λW detected at the side of the board The average value of (work side) may be used instead as the height of the wave on the center line of the plate width, or it may be calculated using any of the wave height detectors as a reference.

Based on the detected λ and λmin, Δλ1 - λ - λm
Fully adjust the eccentricity of the grooved roll so that it becomes 1n-〇.

The principle is shown in Figure 5. FIG. 5(a) shows the detected value λ of the wave height, and the rolling reduction amount δ is changed over time so as to smooth this waveform. The reduction amount δ is the set value a
, corrugation speed (circumferential speed of the grooved roll) ■, and machining time t, as a function of δ=ψ(a, v, t). For example, the simplest function is δ=δo +asin (■/1%
10 tons). Here, δ0 is the above-mentioned setting value, and R is the radius of the grooved roll.

'C-1/te,-' a = Δλ1-0
Adjust a as f (ΔλI).

Figure 5 (0) shows the -1-notation δ-ψ (a, ■, t), and Figure 5 (...) shows the state in which the wave height λ is controlled to the target value λO. ing.

In the second step, the wave heights λW, λD on the work side and drive side and the rolling loads Pw, PD'i on the work side and drive side are measured, and the difference in wave height in the root width direction Δλ2−λW−λD Fully adjust the rolling load on the work side and drive side or the celsin position of the work side and drive side so that the value becomes 0. For example, when adjusting the rolling load, the function g(Δλ
2), and adjust the rolling load on one side, for example, the work side load Pw - 2Pw = PD + ΔP.

In the third step, the average value λ6 of λW and λD and the target value λ.

In this case, the function h(λ0
゜Δλ3) and the amount of elastic deformation of the device (PW+PD
)/ni is set as the above-mentioned δ0, and the rolling reduction amount δ is adjusted. Here, {circle around (2)} is the spring constant of the device including the housing, rolls, chocks, etc.

As mentioned above, feedback control not only allows the height of the waves to match the target value, but also makes it possible to obtain a uniform wave shape in the longitudinal direction and the width direction of the plate.

FIG. 6 shows another embodiment of the invention. In the above embodiment, the corrugation member was composed of a pair of grooved rolls, but in this embodiment, it is composed of a combination of one grooved roll and a high-pressure water injection nozzle. It is also a thin plate cut into a certain length. In FIG. 6, the same members and devices as those shown in FIG. 1 are given the same reference numerals, and the description of these parts is omitted.

For corrugation, the member 41 is a grooved roll 5 and a high-pressure water jet nozzle 4.
It consists of 2. The high-pressure water injection nozzle 42 is arranged directly below the grooved roll 5 and opens along the roll 5 in the form of a slit. The width of the opening is about 1"I, 5 to 5 mm. A high pressure water injection nozzle 42 is attached to a header 43 and connected to a pump 45 via a pressure regulating valve 44.

A pair of press rolls 46 are arranged on the exit side of the corrugated member 41. In addition, the corrugation is done by thin plates 1 and 1 on the front and back of the member 41.
A guide plate 47 is provided to prevent the plate from warping and to correctly guide the plate to the pass line.

In the apparatus constructed as described above, the thin plate 1 is pressed against the surface of the grooved roll 5 by a high-pressure water jet ejected from the high-pressure water jet nozzle 12, and is plastically deformed following the grooves 11. The corrugation is lightly compressed by a presser roll 46 on the thin plate, that is, the corrugated plate 2, which has come out of the member 41, and vibrations are absorbed. The presser roll 46 is driven to rotate at the same circumferential speed as the grooved a-ru 5.

The wave height of the corrugated plate 2 is detected by the wave height detector 33 in a state where the vibration has disappeared. The detection signal is fed to the control device 35, and the reduction amount δ or the reduction load P is adjusted according to the deviation from the target value, as in the first embodiment. The reduction load is adjusted by adjusting the pressure of the high-pressure water jet ejected from the high-pressure water jet nozzle 42, the nozzle position, and the roll position.

A pressure regulating valve 44 is connected to the pressure of high pressure water supplied to the nozzle 42.
The temperature is adjusted, for example, in the range of 50 to 500 KVC'.

This invention is not limited to the above embodiments.

That is, in the first embodiment, the lowering device may be an electric type instead of a hydraulic type. ′! ! :For corrugation, one of the rolls of the member may be a roll without grooves. In this case, the surface of the non-grooved roll is rubber lined. Furthermore, internal pressure is applied between the rubber lining and the boober,
The roll crown may also be adjusted. Alternatively, in a pair of rolls, one may be rotationally driven and the other may be set as an idler.

The wave processing device configured as described above has a plate thickness of 20 mm, for example.
It is applied to process corrugations with a height of 5 μm to 25 mm and a pitch of 1 to 30 mm (7) on thin metal plates such as steel, aluminum, copper, etc. In particular, the present invention is effective in manufacturing electrical steel sheets that require accurate waveforms.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, in which a perspective view of the main parts of a wave application I device, Fig. 2 a partially enlarged sectional view of the grooved roll shown in Fig. 1, and Fig. 3 show a corrugated plate. Figure 4 is a flowchart showing an example of wave height control; Figure 5 is a diagram illustrating the entire principle of control;
6 shows another embodiment of the present invention, and is a schematic diagram of a wave processing device. 1... Metal thin plate, 2... Corrugated plate, 4, 41... Corrugated member, 5.7... Grooved kilo roll, 11... Groove, 16
．． 17...Chock, 21...Reducing device, 22...
・Hydraulic cylinder, :31.4('y...Thin plate support member, 33...Wave height detection device, 34...Load cell,;3
5...Control device, 42...High pressure water injection nozzle. Patent Applicant Representative Patent Attorney Ya Fuki Otsuyuki (and 1 other person) O 2 T 2 ゐ730<YariAI't311

Claims (1)

[Claims] A corrugated member 4, which is a grooved roll 5, 7 which is rotatably driven, has a large number of grooves 11, at least one of which extends in the axial direction of the roll, so as to press the thin metal plate 1 from front to back.
At least one corrugation is connected to the drive side and work side of the member 4, respectively, and the full corrugation of the thin plate 1 is connected to the drive side and the work side of the member 4.
The rolling down device 21 presses the corrugated thin plate 2, and the corrugation is applied to the thin plate supporting member 31 adjacent to the exit side of the member 4, the corrugated area near the thin plate supporting member 31, the drive side of the corrugated thin plate 2, and the side edge of the workpiece. A thin plate corrugating device comprising a pair of wave height detectors 33 arranged to face the surface of the thin plate 2, and a control device 35 that controls the rolling device 21, respectively, based on signals from the wave height detectors 33.