JPH05228813A - Metal coil grinding method and device - Google Patents

Abstract

PURPOSE:To avoid remaining of grinding wheel grain in the next rolling process by inclining a grinding wheel grain obliquely to the advancing direction of a metal strip. CONSTITUTION:The axis of a rotating grinding wheel 1 is inclined obliquely to the advancing direction of a metal strip 2 as shown by a rotating grinding wheel 31, whereby when the grinding wheel grain is inclined obliquely to the advancing direction of the metal strip 2, the grinding wheel grain easily disappears in the next rolling process. Thus, in the next rolling process, the grinding wheel grain is levelled flat so that the surface of a product becomes beautiful and the value thereof becomes very high.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for grinding a metal coil grinding line for grinding the surface of a metal strip that is difficult to pickle with a grindstone. In particular, the present invention relates to a grinding method and apparatus for a metal coil grinding line, which is suitable for manufacturing a product in which it is required to minimize the presence of grinding marks on the surface of a metal strip product.

[0002]

2. Description of the Related Art The main construction of a conventional apparatus for grinding the surface of a metal plate using a grindstone is, for example, Japanese Patent Laid-Open No. 56-146.
The one proposed in Japanese Patent No. 653 is general. FIG. 4 is an elevational view of a side surface of a rotary grindstone portion of a grinding line according to a technique proposed in Japanese Patent Laid-Open No. 56-146653.

In the figure, 1 is a rotary grindstone. 2 is a metal strip. 3 is a backup roll. Four
4 is a pass line roll. The metal strip 2 advances in the direction of the arrow 45. The metal strip 2 is first wound around the pass line roll 44 and then wound around the backup roll 3. Here, the rotating grindstone 1 is pressed against the metal strip 2, and the upper surface of the metal strip 2 is ground by the rotating grindstone 1. Then, the metal strip 2 is wound around the pass line roll 44 and exits from the grinding device.

[0004]

However, in the metal coil grinding line for grinding the surface of the metal strip by using a grindstone, there is a problem in that grinding marks remain on the surface of the product, which is not preferable.

The present invention has been made to solve this problem, and a method and an apparatus for grinding a metal coil grinding line capable of eliminating the residue of the ground lines after rolling in the next step of the metal coil grinding line. The purpose is to provide.

[0006]

In a metal coil grinding method and apparatus according to the present invention, in a metal coil grinding line using a grindstone, the axis of rotation of the grindstone is horizontal 5 ° or more and 30 ° or less from the direction perpendicular to the traveling direction of the metal strip. The rotation axis of the grindstone is 5 ° from the direction perpendicular to the traveling direction of the metal strip. As described above, it is characterized in that it is provided with a mechanism for horizontally rotating it by 30 ° or less.

[0007]

[Function] By rotating the axis of rotation of the grindstone horizontally from the direction perpendicular to the traveling direction of the metal strip and inclining the grinding grain obliquely from the traveling direction of the metal strip, the grinding grain on the metal strip has an angle with the traveling direction of the metal strip. As a result, in the rolling process of the next step, the ground lines are flatly wrinkled and simultaneously stretched. As a result, the grits on the surface of the metal strip can be significantly reduced even at low rolling rates.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a side elevational view of a metal coil grinding apparatus according to the present invention. In the figure, 1 is a rotary grindstone. 2 is a metal strip. 3 is a backup roll. 4 is a lower pinch roll. 5 is an upper pinch roll. 6 is a deflector roll. 7 is a pay-off reel. Reference numeral 8 is an input side coil. 9 is a tension reel. Reference numeral 10 is an output side coil. The metal strip 2 unwound from the entrance side coil 8 supported by the payoff reel 7 is wound around the entrance side lower pinch roll 4 and is grasped by the upper and lower pinch rolls 4 and 5 and pulled out.

Next, the metal strip 2 is gripped between the rotary grindstone 1 and the backup roll 3 and rubbed by the rotary grindstone 1 to grind the upper surface. Then, the metal strip 2 is grasped by the upper and lower pinch rolls 4 and 5 and pulled out. Next, the metal strip 2 is gripped between the rotary grindstone 1 and the backup roll 3, and the lower surface is ground by the rotary grindstone 1.

The rotating grindstone 1 and the backup roll 3 in the preceding stage
Is swung to the right in the direction of travel with a width of 5 ° to 30 °.
Shows the situation where it is shaken by 9 °. The rotating grindstone 1 and the backup roll 3 in the latter stage are swung to the left in the traveling direction by a width of 5 ° to 30 °, but in FIG. 2, they are swung by 9 °. This angle is the surface condition of the material, the target surface condition,
The optimum value is obtained in consideration of the rolling reduction, the degree of rolling, the material and the efficiency in the next process. The angle of the shake may be slightly different in the vertical direction, and the shake in the left and right directions may be the same or different.

Of course, it is also included in the scope of the present invention that only one set of rolls is shaken, so that the upper and lower surfaces have different surface conditions, for example, one surface has a grind. The angle swung to the left and right was 5 ° to 30 °. If it is 5 ° or less, the effect that the grinding marks are less likely to remain after rolling is not remarkable. If the angle exceeds 30 °, the present invention is effective, but the required roll length becomes long. Metal strip 2 is payoff reel 7
Since it is taut with the tension reel 9, even if the rotary grindstone 1 is swung 9 ° to the left and right in the traveling direction, the metal strip 2 advances straight. Metal strip 2
Then, the upper and lower pinch rolls 4 and 5 are gripped and pulled out. After that, the metal strip 2 is wound around the deflector roll 6 and then wound around the tension reel 9 to form the output side coil 10.

FIG. 2 is a plan view of the metal coil grinding apparatus according to the present invention. In the figure, 1, 2, 3, 4, 5, 6,
7, 8, 9 and 10 are the same as in the case of FIG. In the figure, 21 is a rotary grindstone drive motor. 22 is a universal joint. Reference numeral 23 is a shaft that can be expanded and contracted, which is called a shaft with a spline. 24 is a rotary grindstone 1 and a backup roll 3
Is a hydraulic cylinder that swings to the left and right in the traveling direction. The hydraulic cylinder 24 is rotatably fixed by a rotary joint 25. Reference numeral 26 denotes a piston shaft of the hydraulic cylinder 24, which is rotatably fixed to a bearing box for the rotary grindstone 1 and the shaft of the backup roll 3. In this figure,
The rotary grindstone 1 and the backup roll 3 in the front stage are shaken by 9 ° to the right in the traveling direction, while 31 in the front stage indicates the rotary grindstone in this state. The rotating grindstone 1 and the backup roll 3 in the latter stage are swung 9 ° to the left in the traveling direction, while the latter 31 represents the rotating grindstone in this state. The drive shaft is bent at the position of the universal joint 22 in both the front stage and the rear stage, and the rotary grindstone 1 and the backup roll 3 are swung 9 ° to the left and right in the traveling direction.

FIG. 3 is a perspective view of an essential part of the metal coil grinding apparatus according to the present invention. In the figure, 1, 2 and 3 are the same as in the case of FIG. In the figure, 31 is the rotary grindstone 1 in the previous stage.
The backup roll 3 is swung to the right by 9 ° in the traveling direction, and the rotary grindstone in this state is shown. Reference numeral 33 shows a state in which the backup roll 3 is similarly swung 9 ° to the right in the traveling direction. The grinds on the metal strip 2 are swung to the left and right by 9 °, and in the rolling in the next step, the grinds are flatly wrinkled and do not remain.

[0014]

According to the metal coil grinding apparatus of the present invention, since the ground lines are flatly wrinkled and disappear in the rolling of the next step, the surface of the product metal coil becomes beautiful and the value as a product is very high. Become.

[Brief description of drawings]

FIG. 1 is an elevational view of a metal coil grinding device of the present invention.

FIG. 2 is a plan view of a metal coil grinding device of the present invention.

FIG. 3 is a perspective view of a metal coil grinding device of the present invention.

FIG. 4 is an elevational view of a rotary grindstone of a conventional grinding line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotating grindstone 2 metal strip 3 backup roll 4 lower pinch roll 5 upper pinch roll 6 deflector roll 7 payoff reel 8 input side coil 9 tension reel 10 output side coil 21 rotary whetstone drive motor 22 universal joint 23 expandable shaft 24 hydraulic cylinder 25 Rotary joint 26 Piston shaft 31 Rotating whetstone in a vibrating state 33 Backup roll in a vibrating state

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Teruo Ito 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Steel Pipe Co., Ltd.

Claims (2)

[Claims] 1. In a metal coil grinding line using a grindstone, the axis of rotation of the grindstone is horizontally rotated by 5 ° or more and 30 ° or less from a direction perpendicular to the traveling direction of the metal strip, and the grinding eye is inclined obliquely from the traveling direction of the metal strip. Thus, the method for grinding a metal coil is characterized in that after the rolling in the next step, the residue of the grinding is eliminated. 2. A metal coil grinding line using a grindstone, comprising a mechanism for horizontally rotating a rotary shaft of the grindstone by 5 ° or more and 30 ° or less from a direction perpendicular to the traveling direction of the metal strip. apparatus.