JPH05307010A - Automatic grinding device - Google Patents

Abstract

PURPOSE:To provide an automatic grinding device which can find a minute surface defect of a strip by grinding the surface of the strip uniformly. CONSTITUTION:Grinder elements 2a-2d are arranged in the direction across the width of a strip 1, fixed to the bottoms of supports 3a-3d, and held normally over the surface of the strip 1 by heaving these supports 3a-3d by springs 30a-30d. A resilient tube 4 each is in contact with the tops of the supports 3a-3d, and the compressed air is sent into them by a gas supplying device to inflate the tubes 4 within respective outer cylinders 40, which causes the supports 3a-3d to be depressed against the resilient force of the springs 30a-30d. Thus, the grinder elements 2a-3d are brought into contact with the surface of the strip 1, which is then ground when it is moved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic grindstone mounting device used for the purpose of inspecting microscopic defects on the strip surface.

[0002]

2. Description of the Related Art Concavo-convex defects occur on the surface of cold-rolled steel sheets and plated steel sheets during the manufacturing process and the strip-passing process, and it is difficult to find them in running inspections and visual static inspections with defect detection sensors. Although there are some microscopic defects, such microscopic defects are detected by an inspector who partially wears a grindstone and detects the difference in how the grindstone is applied.

That is, when the grindstone is hung, the fine concave defect portion is less likely to be hit by the grindstone than the normal portion, whereas the fine convex defective portion is strongly hit by the grindstone, and the gloss varies depending on the defective portion. Due to this slight difference in gloss, it is possible to detect the minute unevenness of the strip.

On the other hand, the defects include point-like defects and line-like defects. Particularly, the line-like defects are often in the strip width direction or the strip longitudinal direction. In this case, the grindstone needs to be hung in the direction perpendicular to the defect. It is also necessary to carry out the strip longitudinal direction and width direction.

Further, defects cannot be discriminated unless the strip is uniformly polished according to the shape of the strip, and it is necessary to adjust the pressing force of the grindstone and the number of polishings according to the hardness of the strip. It was difficult to automate.

For this reason, various automatic grindstone mounting devices have been proposed in the past in order to eliminate the complexity of the work of the inspection worker. 59-
In No. 183745, as shown in FIG. 5, the outer surface of the roll 60 is covered with a sand sheet 62 via an elastic body 61 such as rubber, and the roll 60 is pressed against the strip surface.
In addition, the utility model Sho 61-148558 and the utility model 2-63957
In JP-A-59-20933 and JP-B-59-20933, as shown in FIGS. 6, 7 and 8, the grindstone 2 is adjusted by a cylinder mechanism 7 via a spring or the like and pressed against the surface of the strip 1.
It is a device for polishing the surface of the strip 1 by pressing it.

[0007]

However, the above-mentioned actual exploitation 5
According to the technique of 9-183745, the life of the sand sheet is short and it takes a long time to replace it, and the running cost is high. In addition, the utility model Sho 61-148558 and the utility model 2-639
In No. 57, the efficiency of the whetstone is low and the pressing force is controlled by each cylinder mechanism 7, so the average surface pressure of the whetstone 2 is constant, but the control of the surface pressure distribution is impossible.
Equipment costs are high. Further, in the technique of Japanese Utility Model Publication No. 59-20933, there is a problem that the surface of the grindstone 2 that touches the strip edge portion is damaged, and when the wider material is polished next, an unpolished portion X occurs.

The present invention was devised in view of the above problems of the prior art, and the pressing force on the strip surface can be easily adjusted, and once set, the grindstone can be constantly pressed with a constant pressing force. (EN) Provided is an automatic grindstone holding device capable of holding the strip surface so that the strip surface can be uniformly polished.

[0009]

Therefore, an automatic grindstone mounting device of the present invention is provided with a shaped article (hereinafter referred to as a grindstone body) in which a grindstone or an elastic body containing abrasive grains is provided along the strip width direction, and the grindstone. The body is attached to its lower end,
A support body that is normally pushed upward by an elastic body, an elastic tube that is in contact with the upper end of the support body and that pushes down the support body against the elastic reaction force of the elastic body during expansion, and gas inside the elastic tube. The basic feature is to have a gas supply device for supplying.

[0010]

[Operation] When gas is blown into the elastic tube from the gas supply device to expand the elastic tube, the support is pushed down against the elastic reaction force of the elastic body, and the grindstone body is pressed against the strip surface with a constant pressing force. .. By adjusting the gas pressure in this tube, it becomes possible to freely adjust the pressing force, and it becomes possible to press the grindstone body while following the deformation and deflection of the strip, making it possible to evenly polish the strip surface. Become.

In particular, if a grindstone and a support used to support the grindstone and push it up and down in a vertical direction are composed of a plurality of grindstones, the grindstone bodies are arranged side by side in the strip width direction. By the expansion of the elastic tube caused by the gas injection, the grindstone body is pressed against the strip surface, so that the grindstone body can be pressed uniformly over the entire width while following the unevenness of the strip surface.

Further, with respect to these grindstone bodies, their side portions are inclined with respect to the strip pass line,
In addition, by configuring the adjacent side parts to be parallel to each other (for example, a rhombus shape), the non-polished area that has been thought to occur between the grindstones until now does not occur, and the total strip width It becomes possible to polish uniformly over the entire length.

Incidentally, for polishing in the width direction of a strip wider than the width of the above-mentioned grindstones or wider than the entire width of the grindstones arranged, a cylinder or the like is used to reciprocate the whole whetstones in the strip width direction. Also, polishing in the width direction can be made uniform.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing the construction of an embodiment of an automatic grindstone mounting device of the present invention.

In the figure, the construction of this embodiment is composed of a plurality of grindstones 2a to 2d, supports 3a to 3d having the grindstones 2a to 2d attached to their lower ends, and upper ends of the supports 3a to 3d. Elastic tube 4 made of a rubber tube in contact with, and a gas supply device for supplying compressed air into the tube 4 (not shown)
And have.

As shown in FIG. 2, each of the grindstone bodies 2a to 2d has a construction in which a mounting head 21 and a grindstone 22 are integrally laminated with a rubber 20 interposed therebetween, and the grindstone bodies 2a to 2d are arranged along the width direction of the strip 1. Are arranged side by side, and these are, as shown in FIG.
The one shaped into a flat rhombus is used. That is, these side portions are inclined with respect to the strip pass line, and adjacent side portions are in parallel with each other.

Further, the supports 3a to 3d are pushed upward at their upper ends by the springs 30a to 30d in the outer cylinder 40 of FIG. 2, so that the grindstones 2a to 2d at the lower ends thereof are usually It floats above the surface of strip 1 by Δt.

Further, as shown in FIG. 2, the elastic tube 4 is installed in an outer cylinder 40 provided on the upper end side of the supports 3a to 3d and is in contact with the upper ends of the supports 3a to 3d. .. When compressed air is supplied from a gas supply device to be described later and swells up to a certain extent in the outer cylinder 40, the supports 3a to 3d are pushed down against the elastic reaction force of the springs 30a to 30d, and the right side of FIG. As shown, the grinding stone bodies 2a to 2d can be pressed against the surface of the strip 1.

The gas supply device is composed of an air compressor (not shown) so that compressed air can be sent into the elastic tube 4 through the conduit 50, but it is provided in the middle of the conduit 50. The feed amount can be adjusted by the regulator 51, and the pressing force of the grindstone bodies 2a to 2d against the surface of the strip 1 can be controlled by the adjustment.

With the configuration of this embodiment as described above, the strip 1
In the case of polishing in the longitudinal direction, the grinding stone bodies 2a to 2d are set in a row over the width of the strip 1 and set, and after the strip 1 is stopped, compressed air is supplied from the gas supply device to the elastic tube 4
Send an appropriate amount inside. And the grindstone 2 on the surface of the strip 1
By uniformly contacting a to 2d and moving the strip 1 again in its longitudinal direction, the entire surface thereof is evenly polished.

It should be noted that although the strip 1 can be polished in the width direction, in that case, a proper gas pressure is applied to the elastic tube 4 so that the surface of the strip 1 is uniformly contacted with the grindstones 2a to 2d. This is possible by reciprocating the outer cylinder 40 in the direction perpendicular to the strip path line by the cylinder 6 as shown in FIG. Strip 1 with such polishing
The surface is uniformly polished, and it becomes possible to easily find fine surface defects in the strip 1.

[0023]

According to the apparatus configuration of the present invention described in detail above, the pressing force of the grindstone against the strip surface can be easily adjusted, and once set, the pressing force is always constant. It becomes possible to hold the grindstone body with, and moreover, it is possible to press the same while following the deformation and deflection of the strip, so that the strip surface can be evenly polished. In addition, in the configuration in which a plurality of grindstone bodies are arranged and arranged in the strip width direction,
In combination with the structure in which the grindstone body is pressed against the strip surface by the expansion of the elastic tube, the grindstone body can be pressed uniformly over the entire width while following the unevenness of the strip surface. And because it uses a whetstone,
The life is longer than the sand sheet life, and the running cost is lower. In addition, because it is a split type, partial replacement is possible, replacement time is fast, and work can be done efficiently. Moreover, since the strip surface can be uniformly polished, it is possible to apply a grindstone equal to or more than that of a skilled operator, so that it is possible to improve quality and save labor by improving defect detection accuracy.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of an embodiment of the device of the present invention.

FIG. 2 is an explanatory diagram showing an operation of the configuration of this embodiment.

FIG. 3 is a plan view showing a planar shape of grindstone bodies arranged in a strip width direction.

FIG. 4 is an explanatory diagram showing a method of polishing in the strip width direction in the configuration of this embodiment.

FIG. 5 is an explanatory diagram showing a conventional configuration of an automatic grindstone mounting device.

FIG. 6 is a perspective view showing another configuration of the automatic grindstone mounting device.

FIG. 7 is a side view showing still another configuration of the automatic grindstone mounting device.

FIG. 8 is a perspective view showing another configuration of the automatic grindstone mounting device.

[Explanation of symbols]

 1 Strip 2 Wheels 2a, 2b, 2c, 2d Wheel bodies 3a, 3b, 3c, 3d Support 4 Elastic tube 6 Cylinder

Claims (3)

[Claims] 1. A grindstone body provided along the strip width direction, and a support body having the grindstone body attached to its lower end portion and normally pushed upward by an elastic body,
An automatic grindstone having an elastic tube that is in contact with the upper end of the support body and pushes down the support body against the elastic reaction force of the elastic body during expansion, and a gas supply device that supplies gas into the elastic tube. Hanging device. 2. The automatic grindstone mounting device according to claim 1, wherein the grindstone body and the support body are composed of a plurality of pieces, and the grindstone bodies are arranged side by side in the strip width direction. Item 1. The automatic grindstone mounting device according to item 1. 3. The automatic grindstone mounting device according to claim 2, wherein the side portions of each grindstone body are inclined with respect to the strip path line, and the adjacent side portions are parallel to each other. The automatic grindstone mounting device according to claim 2, wherein the automatic grindstone mounting device is configured to have the following shape.