JPS59224256A - Device for removing scratch in steel plate - Google Patents

Abstract

PURPOSE:To efficiently carry out the removal of scratches, by providing such an arrangement that a retainer plate is moved to be positioned to a place just above a scratch in a steel plate, on moving right below a sanding belt, and is advanced to press the sanding belt on moving against the outer surface of the steel plate. CONSTITUTION:An endless sanding belt 10 is stretched between drums 11, 12, extending between the direction Y orthogonal to the transfer direction X of a steel plate P, that is, in the widthwise direction of the steel plate P. A retainer plate 23 which is secured to the piston rod 22 of is a cylinder 21, is opposed to the steel plate P through the intermediary of the sanding belt 10 so that scratches in the steel plate P may be removed by grinding. Further, a block 23 carrying the cylinder 21 is supported to a bar 24 to be movable in the direction X while a block 25 supporting the bar 24 is carried by a bar 26 to be movable in the direction Y so that the retainer plate 20 may be moved back and forth and as well left and right to be positioned in any place in a horizontal plane. With this arrangement, the retainer plate 20 is moved to a place right above a scratch on the steel plate P so that the scratch is removed by the sanding belt 10 which grinds the outer surface of the steel plate P.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a steel plate flaw removal device for removing defects occurring on the surface of a rolled steel plate.

[Problems with conventional technology]

Conventionally, this type of surface scratch removal of steel sheets has been carried out by hand using a hand grinder or a wagon grinder. However, this method requires a great deal of labor, has extremely low work efficiency, and has the drawbacks of poor quality.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a steel plate chip removal device that can automatically and efficiently remove flaws on the surface of a steel plate.

[Structure of the invention]

In order to achieve the above object, a steel plate flaw removing apparatus according to the present invention includes a bell I, a horizontally installed horizontally installed sand bell T, a rotary drive means for the sand bell T, and an inner surface of the sand belt. A holding plate installed opposite to the sand belt, a driving means for moving the holding plate forward and backward so as to be suppressed and released from the inner surface of the sand belt, and a driving means for positioning and moving the holding plate on a horizontal plane. It is characterized by

That is, the steel plate flaw removal device according to the present invention transports the steel plate directly under the sand belt, or the device is mounted on a trolley and runs as necessary, and the holding plate is moved back and forth and left and right to remove the flaws directly above the flaw. At the same time, the belt is moved forward to partially press the rotating sand belt against the surface of the steel plate, thereby grinding out any flaws on the surface of the steel plate.

〔Example〕

FIG. 1 schematically shows an embodiment of a steel plate flaw removing apparatus according to the present invention. A plurality of conveying rollers 1 arranged in parallel can each be driven to rotate clockwise, and convey one steel plate P in the direction of arrow X. do.

Sand belt lO is V ram 11. 124 pieces stretched in an endless manner - Direction Y perpendicular to the conveying direction of the steel plate
- In other words, it extends in the width direction of the steel plate P. )' Ram °11 is connected to the motor (not shown) on the drive side.
The sand belt 10 is driven to rotate in one direction. drum 1
2 is a driven side, which is always urged outward by a hydraulic cylinder (not shown) to apply a constant tension to the sand belt 10.

Length hx of the nao sand belt 10 corresponds to the maximum width dimension of the steel plate P conveyed on the conveyance roller 1.

The holding plate 20 is approximately 60 mm square, and has a size of 1 J and 2
1 piston rod 22, sand bell) 10
The steel plate P is pressed by the sand belt 10, which is rotatably driven by driving the counter 21 and advancing the piston rod 22, to remove scratches on the steel plate P. to grind. The driving of the cylinder 21 is instantaneous, and the above-mentioned suppression is immediately released. In addition, the cylinder 21
The block 23 with the
The block 25 to which the bar 24 is attached is supported by the bar 26 and is movable in the direction of arrow Y - that is, the direction of the steel plate p cvI. In other words, the holding plate 20 can be positioned and moved forward, backward, left, and right on a horizontal plane, and the driving means may be a screw type or a wire drive type using a combination of a motor, a ball screw, and a nut, although not shown.

Zarani - above Sanji Bell l - 101tll work board 2 o
.

The driving means and the like are mounted on a truck (not shown), and the truck is capable of traveling a certain distance in the same direction as the conveyance direction of the steel plate P.

Furthermore, this steel plate grinding device has -
A monitor TV and a computer 2 that calculates the position of flaws detected by the monitor TV are incorporated, and the computer controls the X-direction drive servo motor and the Y-direction drive servo motor to move the presser plate 10 onto the steel plate P. It is designed to be moved over the location of the flaw. The flaws on the steel plate P are marked in advance by an operator - this marking is detected on a monitor TV and stored in a computer, and the time and position for the flaw to pass under the sanding belt 10 are calculated and the holding plate 20 is is moved to a predetermined position and the cylinder 21 is driven to remove the flaw on the marking part. Note that the travel drive hydraulic motor is also controlled by the computer.
This is because if there are many defects, the entire device can be moved to remove the defects.It is also preferable that the entire device C can be moved up and down. This is to adjust the height of the sand bell (10) according to the thickness of the steel plate P conveyed on the conveying roller 1.

Here, the actual process of removing defects will be explained in detail. As shown in Figures 3a and 3b, when the holding plate 20 is lowered and the sand bell 10 is partially pressed onto the steel plate P, the pressed part is scraped off by about 0.5 mm and one flaw is removed. Ru.

At this time, if the presser plate 20 has a corner that is perpendicular to the front and back direction of conveyance, the grinding marks will be stepped, which is undesirable as a product. Therefore, it is necessary to process the front and rear corners 20a, 201) of the presser plate 20 into an arc shape. Also - front and rear corners 20a,
Making 20b round has the effect of eliminating excessive force from being applied to the sand belt 10 and improving the durability of the sand belt 10.

On the other hand, when considering the relationship between the shape of the presser plate 20 and the grinding marks in the rotational movement direction of the sand belt 10, FIG.
As shown in FIG. 4b, the sand bell) 1 (3) is pressed onto the steel plate P at an angle θ corresponding to the displacement distance a, so that no steps are formed in the grinding marks.

However, as shown in FIG.
0C and 20d are slightly rounded. This is to ensure smooth movement of the sandbell 10 and improve its durability.

It should be noted that the steel plate IJfF removing apparatus according to the US invention is not limited to the above-mentioned embodiments, and can be modified in other ways within the scope of the invention.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the presser plate is moved directly above the flaws in the steel plate and moved forward, and the surface of the steel plate is ground and the flaws are removed using the sand belt that is rotating once. It is possible to improve the work efficiency dramatically compared to the conventional hand grinder.

[Brief explanation of the drawing]

@ Figure 1 is a perspective view schematically showing an embodiment of the steel plate flaw removing device according to the present invention - Figure 2 is a block diagram of the control means, and Figure 3a
Figures 3b-4a, 41) and 5 are explanatory diagrams of the flaw removing operation. -P... Steel plate, X...
Conveying direction - Y... Width direction -1... Conveying roller, 10
・・Sand belt-11, 12・・Support tram-20
... Pressing board -21 ... Cylinder 24.26 ...
guide bar. Patent applicant: Osaka Fuji Industry Co., Ltd. Agent: Ben Sotoshi Maeda Hao and 2 others

Claims (1)

[Claims] (1) An endless sand belt installed in the horizontal direction, a rotation driving means for this sand belt, a presser plate installed opposite to the inner surface of the sand belt, and a presser plate installed on the inner surface of the sand belt. A steel plate flaw removing device comprising: a drive means for advancing and retracting the holding plate so as to be suppressed and released; and a drive means for positioning and moving the presser plate on a horizontal plane.