JPS5942137A - Thin sheet corrugating device - Google Patents

Abstract

PURPOSE:To form small corrugation with high accuracy and to make the height of corrugation changeable according to need, by pressing a thin metallic sheet against a grooved roll by water jet. CONSTITUTION:A thin sheet 1 is fed between a grooved roll 5 and a nozzle 21 and pressed against the surface of the grooved roll 5 by high pressure water jet spouted from the nozzle 21 and plastically deformed in conformity with the grooves. A controlling computer 35 compares the signal sent from a gap detector 32 with a set value and outputs a controlling signal to an output circuit 15 to maintain the gap at a specified value. The corrugated sheet 2 is supported from below by a supporting roll 31, and minute vibration applied to the corrugated sheet 2 during working is absorbed. A wave height detector 33 detects the height of corrugation continuously under conditions having no vibration. The controlling computer 35 compares the signal sent from the wave height detector 33 with the target height of corrugation, and outputs a controlling signal to a pressure regulating valve 24. By this way, the thin sheet 1 is worked accurately to the target height of corrugation.

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.

It may be necessary to fabricate corrugated metal sheets with relatively small and uniform pitch and height. for example,
In the production of unidirectional 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 completely (Japanese Patent Laid-Open No. 54-40223
reference). For this reason, during the manufacturing process, a corrugation extending in a direction intersecting the rolling direction is formed on one copper base. This waveform has 10 pinches, for example, and is relatively small, with a wave height U of 100 μm, and in order to obtain the required magnetic properties, these dimensions must be accurate and uniform.

It may be necessary to change the wave height depending on the P1 plate thickness, material, etc. In such cases, from the viewpoint of work efficiency and equipment costs, it is desirable to be able to change the wave height within a certain range with one member, without having to replace the corrugation member such as a roll.

Traditionally, in the production of roof panels, corrugated pipes, etc., it has been widely used to corrugate thin sheets using a press.
The height of the waves is large, ranging from several to several meters high, and high precision is not required for its 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 has been made in response to the above-mentioned needs, and it is an object of the present invention to provide a wave processing device that can form small waveforms with high precision and that can change the wave height as necessary.

The sheet corrugating apparatus of the present invention is comprised of a grooved roll and a high-pressure water injection device.

Grooved roll flo - A large number of grooves extending in the axial direction]
It is rotatably driven.

A high-pressure water injection device is provided with a nozzle that runs along the grooved roll adjacent to the grooved roll and opens toward the grooved roll.

In the apparatus constructed as described above, the thin metal sheet to be corrugated is passed between the grooved roll and the nozzle. A jet of water from a nozzle presses the sheet against a grooved roll. The pressed thin plate forms a corrugated shape following the grooves of the grooved roll. The wave height changes depending on the size of the jet pressure.

The jet pressure, or wave height, is the water pressure in the nozzle '1. Alternatively, the size of the gap between the grooved roll and the nozzle can be completely adjusted.

As mentioned above, in this sheet corrugating apparatus, a water jet is used to press a metal sheet against a grooved roll. The thin plate receives uniform pressure from behind and bites into the groove, creating a precise waveform that follows the groove. Further, by adjusting the jet pressure, the penetration of the thin plate into the groove can be adjusted, so the wave height can be adjusted over a considerable range.

Next, embodiments of this invention will be described.

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

As shown in the drawing, grooves 7 extending in the roll axis direction are cut at equal pitches on the surface of the grooved roll 5. The depth 1 of the grooves 7 and the pitch P (see FIG. 2) are determined by the required dimensions of the corrugated sheet. For example, if a corrugated sheet with a thickness of 10 has a maximum wave height of 200 μm and 4 pitches, the groove depth h of the roll 5 is 500 μm and 4 pitches P.

The grooved roll 5 is supported by a chock 10 via a bearing 11. Chock 10 is a stand (not shown)
It is attached so that it can be raised and lowered freely.

An electric motor (none of which is shown) is connected to the roll shaft 6 protruding from the chock 10 via a shaft coupling, a speed reducer, etc., and the roll 5 is rotationally driven.

Further, a lowering device 13 is connected to the chock 10. The lowering device 13 is of a screw type, and is raised and lowered by a chock 10trf' by the drive of a motor 14. motor 14
is connected to a power source (not shown) via an output circuit 15.

The nozzle 21 of the high-pressure water injection device 20 has a slit-shaped opening 22 along the grooves 7 of the grooved rolls 5 facing each other. The width b of the opening 22 (see FIG. 2) is approximately U 0.5 to 5. The nozzle 21 is attached to a header 23 extending along the grooved roll 5. The header 23 is fixed to a frame (not shown).

Further, the header 23 is connected to the bonder 2 via a pressure regulating valve 24.
5.

A support roll 31 is disposed adjacent to the output Will of the wave processing bath formed by the grooved roll 5 and the nozzle 21. The support roll 31 is rotatably attached to a frame (not shown) and supports the corrugated thin plate 2 from below. On the exit side of the support roll 31, the course of the corrugated plate 2 is changed several times or so as to face the lower part of the apparatus.

A gap detector 32 for detecting the gap between the grooved roll 5 and the nozzle 21 is attached to the chock 0. Gap detector 32 actually detects the height position of chock 10. Also, a wave height detector 33 is arranged near the support roll 31 so as to face the surface of the corrugated plate 2. As the wave height detector 33, a commonly used electrical (including magnetic), ultrasonic, or optical plate-shaped detector is used.

The wave processing apparatus of this embodiment is equipped with a control computer 35, which is connected to the detectors 32 and 33 on the input side and to the output circuit 15 and the pressure regulating valve 24 on the output side.

In this embodiment, the thin plate 1 supplied to the corrugating device has a coil shape, and the thin plate 1 is unwound from an uncoiler (not shown) and wound around the coiler (not shown) around the corrugated plate 2. taken.

Incidentally, the thin plate 1 and the corrugated plate 2 are applied with a tension of 1 to 10"7'mi & depending on the material by an uncoiler and a coiler.

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

The thin plate 1i is supplied between the grooved roll 5 and the nozzle 21. The thin plate 1 is pressed against the surface of the grooved roll 5 by a high-pressure water jet ejected from a nozzle 21, and is plastically deformed following the grooves 7. The corrugation speed is, for example, 100 to 300 Roux.

The grooved roll 5 is initially set at a predetermined position. The control computer 35 compares the signal from the gap detector 32 with the set value and outputs a control signal to the output circuit 15. In this case, the gap is held at a predetermined value.

The corrugated sheet 2 is supported from below by support rolls 31. By contacting the corrugated sheet 2 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 wave height of wave &2 in a state where the vibration has disappeared. Control computer: Compares the signal from the double wave height detector 33 with the target wave height, and outputs a control signal of 24 Vrc to the total pressure control valve. Thereby, the thin plate 1 is processed accurately to the target wave height.

FIG. 3 shows an example of the relationship between the pressure within the header 23 and the height of waves formed on the thin plate 1. It is clear from this figure ηΔ that by changing the L) Yc positive pressure, the wave height can be changed over a considerable range. The pressure of the high-pressure water can be adjusted, for example, in the range of 50 to 500 KVcrA.

This invention is not limited to the above embodiments.

For example, the wave height may be adjusted by changing the position of the nozzle relative to the grooved roll while keeping the position of the grooved roll fixed and the pressure of the high-pressure water kept constant.

Alternatively, the wave height may be adjusted by keeping the position and pressure of the nozzle constant and changing the position of the grooved roll relative to the nozzle.

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 μm and a pitch of 1 to 30 μm on thin metal plates such as steel, aluminum, copper, etc. with a thickness of 5 μm to 5 μm. In particular, the present invention is effective in manufacturing electrical steel sheets that require accurate corrugations.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, which is a perspective view of the main parts of the corrugating device, Fig. 2 is a partially enlarged view of the grooved roll and nozzle shown in Fig. 1, and Fig. 3 shows the water pressure. It is a graph which shows an example of the relationship between and wave height. DESCRIPTION OF SYMBOLS 1... Metal thin plate, 2... Corrugated plate, 5... Grooved roll, 7... Groove, 10... Chock, 13... Reduction device, 20... High pressure water injection device, 21... nozzle,
22... Opening, 24... Pressure control valve, 5... Pump, 31... Thin plate support member, 32... Gap detector, 33... Wave height detector, 35... For control computer. Patent applicant Representative patent attorney Tomoyuki Yafuki (and 1 other person)

Claims (1)

[Claims] The grooved roll 5 has a large number of grooves 7″ff extending in the axial direction of the roll, and a nozzle 21 that runs along the grooved roll 5 which is rotationally driven and opens toward the grooved roll 5 along the grooved roll 5V. A thin plate corrugating device comprising: a high-pressure water injection device 20;