JP2711520B2 - Burr removal method and burr removal device for strip-shaped metal plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing burrs which can be suitably removed on a sheared cut surface at an edge in a width direction of a strip-shaped metal plate, particularly a wide and thin strip-shaped metal plate.

[0002]

2. Description of the Related Art For example, as a technique for crushing a shear cut surface at an edge in a width direction of a hot-rolled steel sheet, Japanese Patent Laid-Open Publication No.
As disclosed in Japanese Patent Application Laid-Open No. 1911, both ends of the rolled steel sheet in the sheet width direction are passed between a pair of left and right pressing rollers, and the pressing rollers flatten the shear cut surface of the edge in the sheet width direction to make it smooth. A method for preventing rough ears has been proposed.
If the burrs are crushed by applying this method, there is an advantage that the burrs can be continuously performed under a favorable working environment without problems such as generation of grinding powder and noise generated when the burrs are removed by grinding.

[0003]

However, the above-mentioned prior art is intended only for a relatively thick (thickness 3.2 mm) and rigid steel plate, and furthermore, to eliminate burrs on the shear cut surface of the steel plate. In order to eliminate even minute cracks without stopping, a shearing cut surface is pressed with a strong pressure by a pressing roller. A pressing roller is also used, but this pressing roller is used only for the purpose of preventing only bending in the width direction of the steel sheet caused by strongly pressing the pressing roller against the shearing cut surface. Therefore, such a technology is applied to a wide, thin, and low-rigidity steel plate (a plate width of 500 to 1200 mm and a plate thickness of 0.35 to 0.8
The present inventor has found that there is a problem in responding to the deburring means of mm) as a result of various trial production studies.

[0004] That is, since a wide and thin steel plate has low rigidity, the steel plate is not only flexed in the width direction but also meanders in the running direction when the shear cut surface is pressed strongly by a pressing roller with a strong force and crushed. In addition, a lateral shake phenomenon of skew occurs remarkably. The occurrence of such lateral runout is caused by poor flatness such as ear waves (edge elongation) of the rolled steel sheet. In particular, a flat rolled steel sheet having wide flatness is inevitable in terms of flatness. A wide steel plate has its side elongation increased by rolling compared to the center in the width direction of the plate, so that it is inevitable that so-called ear waves are generated. Since the thickness is thin, the contact pressure of the pressing roller is small at the portion of the ear wave and large at the flat portion. As described above, when the contact pressure of the pressing roller is biased, the steel sheet meanders or obliquely moves to the side where the contact pressure is large. Such meandering or skewing also occurs when the upper and lower press rollers are not parallel or when there is a gap between the left and right pressurizing rollers. When the wide and thin steel plate causes lateral run-out, the edge of the steel plate may be bent and buckled due to the superposition of the lateral skew force and the pressing force of the pressing roller, or the edge of the steel plate may be bent by the pressing roller groove. Therefore, it is difficult to directly apply the burring removal device to a thin steel plate having low rigidity. The present invention has been made in view of such a problem, and a wide, thin, and low-rigidity steel plate does not cause lateral runout, and accordingly does not cause buckling of the hip and derailment from the groove of the holding roller, and It is an object of the present invention to provide a method and an apparatus capable of removing burrs stably and reliably.

[0005]

SUMMARY OF THE INVENTION The method for removing burrs of a strip-shaped metal plate according to the present invention includes a plate width of 500 to 1200 mm and a plate thickness of 0.3 mm.
A band-shaped metal plate of 5 to 0.8 mm is passed between a pair of upper and lower pressing rollers installed before and after the traveling direction of the metal plate so as to be pressed over the entire width of the plate,
When both end edges in the plate width direction of the band-shaped metal plate are passed through the grooves of a pair of left and right burring removal rollers arranged in a left-right facing manner between the front and rear pressing rollers, the upper pressing roller with respect to the upper surface of the band-shaped metal plate is moved. It is characterized in that it is pressed with an air cylinder at a linear pressure of 0.4 to 0.7 kgf / cm, and that the burrs are pressed against the edge of the strip-shaped metal plate with a pressing force of 25 to 50 kgf with an air cylinder .

The burring removal device of the present invention is installed at an intermediate position between the uncoiler and the pinch roller. The burring removal device is unwound from the uncoiler and is pulled by the pinch roller to a width of 500 to 1200 mm and a thickness of the plate. A pair of left and right burring removal rollers each having a groove through which an edge in the width direction of the 0.35 to 0.8 mm strip-shaped metal plate is passed; and A pair of upper and lower pressing rollers that can be pressed over the entire width of the plate, an air cylinder that presses the upper pressing roller against the upper surface of the band-shaped metal plate with a linear pressure of 0.4 to 0.7 kgf / cm, and an edge of the band-shaped metal plate And an air cylinder for pressing the burr removing roller with a pressing force of 25 to 50 kgf.

[0007]

The edge of the strip-shaped metal plate is inserted into the groove of the burring removal roller in a fitting manner and is pulled while the roller is 25 to 50 kgf.
By pressing against the edge of the band-shaped metal plate with the pressing force of the above, the burrs on the edge of the thin band-shaped metal plate having a thickness of 0.35 to 0.8 mm can be crushed. When the burring removal roller is pressed against the edge of the band-shaped metal plate with a pressing force of 25 to 50 kgf or more, the pressing becomes excessive, the band-shaped metal plate bends in the width direction of the plate, buckles and buckles, and derails from the groove of the burring removal roller. tends, lack pressed in 25~50Kgf smaller pressing <br/> force, it can not be crushed sufficiently press back.

When the upper pressing roller is pressed against the upper surface of the band-shaped metal plate with a small linear pressure of 0.4 to 0.7 kgf / cm, a wide plate having a width of 500 to 1200 mm and a thickness of 0.35 to 0.8 mm is obtained. A thin band-shaped metal plate can be prevented from sagging in the width direction of the plate, and can also reduce the side-to-side meandering or skew in the running direction. Derailment from the groove can be prevented. Pressing roller is 0.4 ~ 0.7kgf /
When the linear pressure is larger than cm, the band metal plate is excessively pressed and the band-shaped metal plate is likely to meander or skew.When the linear pressure is smaller than 0.4 to 0.7 kgf / cm, the band metal plate is insufficiently pressed, the holding roller is lifted up, and the band-shaped metal plate is lifted. It is easy to bend in the width direction and the burrs cannot be crushed.

As means for pressing the pressing roller, a hydraulic cylinder or a combination of a coil spring and a screw bolt may be employed, but an air cylinder is advantageous in obtaining a small force as compared with a hydraulic cylinder. In addition, a rod having high rigidity can be selected, and a shock-absorbing effect by air compression elasticity can be expected even for a shock caused by a delicate plate thickness variation. With a pressurizing means using a combination of a coil spring and a screw bolt, it is troublesome to make adjustments to apply even pressure to the left and right bearings of the holding roller, and adjustment across the line is inconvenient for work. By connecting the left and right air circuits into one circuit, it is possible to easily and simultaneously adjust the left and right uniform pressure to the press roller.

[0010] By using an air cylinder as a means for Ru pressing the return removal roller, belt-like metal plate for assay the left and right edges in the strip width direction by the return removal rollers,
Absorbs lateral vibration while causing local deflection between the front and rear press rollers, causing a slight advance / retreat pulsation in the plate width direction.The air cylinder follows this fluctuation, and the necessary pressing action is performed. continue. In addition, the shock caused by the skew of the horizontal run due to the traveling speed of the metal strip can be buffered by the air compression elasticity of the air cylinder.

[0011]

1 is a plan view of an apparatus for carrying out the method of the present invention, FIG. 2 is a side view thereof, and FIG.
FIG. The present apparatus comprises a pair of left and right burring removal rollers 10 as basic constituent members.
An air cylinder 11 for pressing the pressure, a pair of front and rear pressing rollers 12, and an air cylinder 13 for pressing the pressing roller 12 are provided. Reference numeral 20 denotes a table roller. The burring removal roller 10 is a commercially available round edge roller (commonly known), is made of alloy tool steel, and has a groove 15 corresponding to the thickness of the steel plate 14 on the circumference thereof, and an inner bottom portion 15 a of the groove 15. Is formed into a radius R that is half the thickness of the steel plate 14 and is rotatable around the axis 19. For example, the burrs generated on the strip-shaped steel plate 14 having a thickness of 0.35 to 0.4 mm are usually about 50 μm in height, but the burrs are removed when the burrs are crushed in one process using the above-described burrs. When the pressing force of the roller 10 is about 25 to 30 kgf, the burrs can be effectively eliminated and removed. In order to not only remove the burrs but also to increase the degree of perfection by further increasing the radius R of the corners of the edge 14a of the steel plate 14, increasing the pressing force has some effects.
There is a limit due to the round shape of the inner bottom 15a of the groove 15 of FIG.
Therefore, in this case, a plurality of burr removal rollers 10
It is preferable to arrange in parallel with each other at predetermined intervals in the steel sheet traveling direction to form a multi-stage type, and to reduce the size of the groove 15 of the burring removing roller 10 gradually toward the front in the steel sheet traveling direction.

Next, the pressing roller 12 will be described. The steel plate 14 is run by being pulled by a pinch roller 16 disposed in the front in the running direction, and the holding roller 12 is not provided with a function of running the steel plate 14, and is a rotatable non-driving roller without a crown. Use a normal steel roller with a chrome plating on the surface. Further, the pressing roller 12 has a length dimension that can be pressed over the entire width of the steel plate 14 in order to prevent the steel plate 14 from bending over a wide area (bending). A pair of upper and lower pressing rollers 12 and 12 are disposed in front and rear, and a burring removing roller 10 is disposed between the pressing rollers 12 and 12 in front and rear. Pressing roller 12, 1
The smaller the distance between the front and rear, the smaller the local deflection of the steel plate 14, and it is advantageous to obtain a stable pass line for feeding the edge 14 a of the steel plate 14 into the groove 15 of the burring removal roller 10.

[0013] As a specific embodiment, for example, a sheet thickness of 0.
In a blanking line in which a steel plate 14 having a thickness of 35 to 0.4 mm and a width of 500 to 600 mm repeatedly runs and stops at a running speed of 25 to 30 m / min, the present apparatus unwinds a coil material obtained by winding the steel plate 14 in a coil shape. It is installed between an uncoiler 17 and a pinch roller 16 that pulls the coil material and sends it to a punching press (not shown). The burring removal roller 10 is formed with two grooves 15 so as to correspond to the plate thicknesses of 0.35 and 0.4 mm, respectively, and one of them is selected and used. The distance between the pressing rollers 12, 12 is approximately 240 mm. A pressing force of 25 to 30 kgf is applied to the burring removal roller 10 by an air cylinder 11, and the left and right bearings 1 are applied to the upper holding roller 12.
A pressing force of about 16 Kgf is applied by the air cylinder 13 via 8, 18. For example, pressing against the deburring roller 10
An application force of 30 kgf can be obtained by a compressed air pressure of about 2.4 kg / cm ² when an inner diameter of the air cylinder 11 of 40 mm is selected. The pressing force 16 kgf against the press roller 12 is
When the inner diameter of the air cylinder 13 is 30 mm , it is about 2.3
Obtained with a compressed air pressure of Kg / cm ² . The pressing force on the pressing roller 12 is a small one in a range of about 0.5 to 0.7 kgf / cm, when converted into a linear pressure for holding the steel plate 14. As a result of attempting to remove burrs with the above apparatus,
Meandering and skewing can be suppressed, and buckling and derailment can be overcome. Among the 100 steel coil coils, 90 of which have no burrs and one of which has slightly round burrs.
There were zero.

In another embodiment, the thickness is 0.4 to 0.6 mm.
The apparatus is installed in a shear line in which a steel sheet 14 having a width of about 1200 mm runs at about 60 to 70 m / min. The pressing force of the deburring roller 10 is adjusted to about 30 to 40 kgf, and the linear pressure by the pressing roller 12 is adjusted. 0.4-0.5Kgf / cm
Removal of burrs was attempted under the following conditions. As a result, almost the same good results as described above were obtained. Even if ear waves having a wave height of 3 to 5 mm were mixed among the accompanying ear waves due to the variation of the wide and thin steel plate 14, no problem occurred. As still another embodiment, for a steel plate 14 having a thickness of 0.8 mm and a width of about 1100 mm, the pressing force of the removing roller 10 is about 50 kgf in the same line, and the linear pressure of the pressing roller 12 is 0.5 to 0.55 kgf /. An attempt was made to remove burrs under the condition of cm, but in this case, the same good results as above were obtained. It should be noted that even when the line is stopped,
Need to be tensioned. When the tension increases, the pressing force of the burring removal roller 10 can be slightly increased. However, also in this case, the pressing force of the pressing roller 12 is kept low so as not to apply more than necessary in consideration of the line speed. The role of the press roller 12 is to prevent bending of the steel plate 14 and to suppress meandering and skewing only by stably securing a gap corresponding to the plate thickness through which the steel plate 14 passes. Rather, further pressing force is harmful.

In general, when there is a shape defect with a wave height of 2 to 5 mm in a wide and thin steel plate 14 having a thickness of 0.35 to 0.8 mm and a width of 500 mm or more, the burrs are removed. Although depending on the required degree of completion later, the pressing force of the burring removal roller 10 is set to be as low as 25 to 50 kgf, and the pressing force of the pressing roller 12 is also to prevent the steel sheet 14 from being bent and to obtain a stable pass line. It has been found that setting the linear pressure to 0.4 to 0.7 Kgf / cm is advantageous because it has less problem of meandering. Of course, the present invention can be similarly applied to removing burrs of a wide and thin rolled stainless steel plate, a rolled copper plate or a rolled aluminum plate other than a normal steel plate.

[0016]

According to the present invention, it is wide, thin, and low in rigidity.
There metal plate can also be suppressed meandering or skew of lateral oscillation as much as possible, without causing derailment from the groove of the buckling buckling and pressing rollers, the burrs can be stably and reliably removed. In addition, the burring removal device of the present invention can be simply configured and can be easily incorporated into an existing line.

[Brief description of the drawings]

FIG. 1 is a plan view of a burring removal device.

FIG. 2 is a side view of the burring removal device.

FIG. 3 is a sectional view taken along line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Deburring roller 11, 13 Air cylinder 12 Holding roller 14 Strip-shaped metal plate 15 Groove 16 Pinch roller 17 Uncoiler

Claims (2)

(57) [Claims] 1. A sheet width of 500 to 1200 mm and a sheet thickness of 0.35
A band-shaped metal plate of about 0.8 mm is passed between a pair of upper and lower pressing rollers installed before and after the traveling direction of the metal plate so as to be pressed down over the entire width of the plate-shaped metal plate. When both end edges are passed through the grooves of a pair of left and right burring removal rollers disposed in a left-right opposing manner between the front and rear pressing rollers, the upper pressing roller against the upper surface of the band-shaped metal plate is 0.4 to 0 with an air cylinder. .7Kgf / cm linear pressure and press the burrs removing roller against the edge of the band-shaped metal plate.
A method for removing burrs on a strip-shaped metal plate , wherein the burrs are pressed by an air cylinder with a pressing force of 25 to 50 kgf. 2. A burring removal device is installed at an intermediate position between the uncoiler and the pinch roller. The burring removal device is unwound from the uncoiler and is pulled by the pinch roller to a width of 500 to 1200 mm and a thickness of 0.35 to 0 mm. A pair of left and right burr removing rollers having grooves through which edges of the 8 mm band-shaped metal plate in the plate width direction are passed, and respectively disposed before and after the burr removing roller in the traveling direction of the metal plate and pressing down the entire width of the metal plate. A pair of upper and lower holding rollers that can
Adjust the upper press roller to 0.4 to
An air cylinder that holds down with a linear pressure of 0.7 kgf / cm, and a burring removal roller against the edge of the band-shaped metal plate is 25 to 50 kgf.
And an air cylinder for pressing with a pressing force of a predetermined value.