JPH03213274A - Roll polisher - Google Patents

Abstract

PURPOSE:To perform the smoothing of a mill roller, a leveler roll, a pinch roll or the like arranged in a paired state or the cleaning of descaling or the like so efficiently in a short time by forming both sides of a cushion material in the central part with an elastic grindstone through a flexible reinforcing material. CONSTITUTION:A central part is formed out of a cushion material 1, and each other side of both vertical sides of this cushion material 2 is set down as an elastic grindstone 3 through a flexible reinforcing material 2, thereby securing a desired polisher. At the time of use of this polisher, it is efficient that this polisher is pulled by a wire rope or the like and used, and in this case, it is recommended that one side or both sides of this polisher, pinching a metal fitting 5 welded to a steel pipe or a bar 4 or the like, is fixed by a pressure flange 6 and a bolt 7 and pulled by the wire rope or the like.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a rolling machine, a leveler and a pinch roll, or a polyrusher incorporating an elastic grinding wheel for removing scale and smoothing steel, special steel plates, etc. .

[Conventional technology 1] Damage caused by scale adhesion and foreign matter trapped on the surfaces of various rolls used by steel and non-ferrous metal manufacturers is a major cause of problems in terms of workability and quality.

To smoothen the roll surface, remove scale, etc.
As described in Japanese Patent No. 7-184508, an elastic grindstone having abrasive grains fixed to fiber or felt-like nonwoven fabric with various resins is used.

Further, as seen in Japanese Utility Model Application No. 59-28574, a weight having a polishing tool such as an elastic grindstone on the back side is pulled by a wire to smooth and clean the roller surface.

[Problems to be Solved by the Invention] In the above-mentioned weight type polyrusher equipped with only an elastic grindstone body or an elastic grindstone, it is difficult to smooth or clean a pair of rolling rollers arranged vertically or horizontally at once. It is inefficient to do so, and it may even damage the roller surface, and it is also inefficient to remove scale or smoothen one side of two sheets of steel, special steel plates, etc. at once.

It is an object of the present invention to solve these problems.

[Means for Solving the Problems 1] As a result of studies to solve the above-mentioned problems, the inventor of the present invention found that the center portion is made of a cushioning material, and both sides of the cushioning material are made of a cushioning material through a flexible reinforcing material. A Bolisher head is characterized by being made of an elastic whetstone.

Cushioning materials used in the present invention include soft urethane foam, sponge rubber, foam rubber, etc.
The cushioning material is desired to be compressed when pressure is applied, to have a small residual strain when the pressure is removed, and to be free from cracks, cracks, cracks, etc.

The residual strain was determined by repeated compression residual strain test (J [S K
6401) whose cyclic residual strain rate is preferably within 10%. If it exceeds 10%, the restoring force decreases depending on the pushing amount of the bonosher, resulting in insufficient polishing of the roller surface, etc., or the occurrence of parts that cannot be polished.

In addition, cushioning materials need to have small residual strain and appropriate hardness, and in the case of urethane foam, JIS K
The hardness is preferably 50 to 150 kg according to 6401 standard, and in the case of sponge rubber and foam rubber, JIS
Hardness is 0.16-0.5 kg according to K 6382 standard
/C is preferred.

Less than 50kg or 0.16kg/crn respectively
If the weight is less than 150kg or 0.5kg/cm, the restoring force and back strength will be too small, resulting in unpolished or insufficiently polished areas.If the weight exceeds 150kg or 0.5kg/cm, the cushioning material Because it is hard, the elastic whetstone does not adapt to the surface of the roll being polished, resulting in insufficiently polished areas or unpolished areas.
An f@ portion will occur, and some portions will hit the roll too hard, resulting in more polishing than necessary and increased contact resistance with the roll during polishing.

Next, the reinforcing materials used in the present invention are canvas,
Woven fabrics or non-woven fabrics such as real cotton fabric, linen fabric, feathers, etc. can be used, and woven fabrics coated with rubber, resin, etc. may be used, or woven fabrics and non-woven fabrics may be laminated. As a reinforcing material, it is flexible and flexible, and does not easily cause cracks or tears even with one bend (and preferably has a tensile strength of 25 kg/cm or more. When polishing the roller surface, etc. receive,
If the tensile strength of the reinforcing material is less than 25 kg/cn+ when the elastic grindstone is subjected to a force that is sent out in the direction of rotation of the roller, cracks and tears will occur in the elastic grindstone.

The present invention is characterized in that, as shown on the right side of FIG. 1, the center part is made of a cushion material 1, and the upper and lower outer sides of the cushion material 1 are made of elastic grindstones 3 through a flexible reinforcing material 2. These parts are bonded together using an adhesive.

The elastic grindstone used in the present invention may be a conventional one,
The base fabric can be one or more of chemical fibers such as nylon and acrylic, natural fibers such as cotton and flax, and mineral fibers such as glass fiber, non-woven fabric, or a combination of both. However, fine abrasive grains such as silicon carbide or fused alumina are impregnated and fixed to this base fabric with a binder such as phenol resin. The grain size of the abrasive grains is #24~#
1000 is preferable, and can be arbitrarily selected depending on the finish roughness of the roller surface, etc., and the state of deposits and flaws.

In order to exert abrasive force on the roller etc. to be polished and maintain the abrasion resistance of the grindstone, it is desirable to use the elastic whetstone at a linear pressure of 2 to 6 kg/CIm;
If the polishing force is less than 6 kg/cm, the polishing power will not be exhibited.
If it exceeds m, there is a problem in wear resistance.

It is most efficient to set the pushing amount of the polyurethane so that the above pressure is applied to the roller surface of the pair of rollers. Therefore, it is more preferable to use rubber foam or sponge rubber as the cushioning material when the stroke interval between a pair of rollers is as narrow as 45 mm or less, and to use urethane foam when the stroke interval exceeds 45 mm. Also, for rubber foam and sponge rubber, 10
It is preferable that the thickness be 30 mm or more for urethane foam, and if the thickness is less than 30 mm or more,
If it wraps around the polishing surface of a roll or the like, polishing pressure will not be obtained.

When using the poly lasher of the present invention formed in this manner, it is efficient to pull it with a wire lobe or the like. As shown on the left side, it is also possible to sandwich a metal fitting 5 welded to a steel pipe or rod 4, fix it with a presser flange 6 and bolts 7, and pull it with a wire lobe or the like.

〔Example] The present invention will be explained in detail with reference to Examples.

Example 1 Cushioning material with residual strain rate of 3% and strength (JIS 64
01) 100kg urethane foam 40m thick
m, width 4.1m, length 3.8m, product number #9 as reinforcement material
The cotton canvas is 4.1 m wide and 4 m long, and the non-woven elastic whetstone has abrasive grains #220, 10 mm thick, 4.1 m wide, and 4 m long.
A polyrasher was made by adhering M with an adhesive (epoxy polyamide) as shown in Fig. 1.

This poly lasher was pulled with a wire and the rollers of the hot rolling leveler device (roller width 4 m, roller pitch 0.17
5m, number of rollers: 9) rotated at 6r, p, m,
Each roller was polished for 10 minutes.

As a result, the amount of deposits and protrusions on the roller surface was reduced from 100 μm to 10 μm or less.

[Effects of the Invention] The body shear of the present invention makes it possible to efficiently clean rolling rollers, leveler rolls, pinch rolls, etc. arranged in pairs, such as smoothing or removing scale, in a short time, and also to clean steel plates. It is also possible to remove the scale of two sheets at the same time and smooth them efficiently and in a short time.

[Brief explanation of drawings]

FIG. 1 shows an example of the polyrasher of the present invention. ! ... Cushion material, 2 ... Reinforcement material 3 ... Elastic grindstone, 4 ...
Steel pipe 5...Metal fittings, 6...
・Presser flange 7 - Bolt

Claims (1)

[Claims] A polisher characterized in that the center portion is made of a cushioning material, and both sides of the cushioning material are made of an elastic grindstone via a flexible reinforcing material.