JPH06155314A - Grinding tool of laminated roll type - Google Patents

Abstract

PURPOSE:To provide a grinding tool compatible with extensive grinding conditions by assembling a plural number of kinds of different polishing cloths with different thread density constituting meshes of cloth base materials concerning a grinding tool constituted by way of assembling a plural number of the polishing cloths with abrasive grains applied and fixed on a mesh cloth base material. CONSTITUTION:This grinding tool is manufactured as a grinding tool of a laminated roll type by inserting a standard type mesh grinding cloth sheet A and a mesh grinding cloth sheet B of higher thread density than the former standard type mesh grinding cloth sheet A in a spindle 7 in the state of alternately laminating them so that it becomes specified proportion, holding them with a flange 8 while pressurizing them by compression press and screwing them with a nut 9. The mesh grinding cloth sheet A is constituted by adhering abrasive grains 4 on a cloth base material 1 woven with vinylon threads in proportion of longitudinal 15 pieces/inch and lateral 15 pieces/inch by means of using adhesives 2, 3, and the mesh grinding cloth sheet B is formed by adhering the abrasive grains 4 on a cloth base material 5 woven with union yarn of polyester and cotton in proportion of longitudinal 90 pieces/inch and lateral 50 pieces/inch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminating roll type grinding tool for grinding and removing irregularities and deposits on the surface of an object, and more particularly to the surface of a strip-shaped metal body such as a hot-finished stainless steel strip. The present invention relates to a laminated roll type grinding tool for effectively removing oxide scales and flaws generated in the above.

[0002]

2. Description of the Related Art In order to finish the surface of an object into a smooth surface with no uneven gloss, it is necessary to remove the irregularities and deposits formed on the surface. In particular, the band-shaped metal body that has been hot-finished has surface oxide scales and flaws (for example, bald flaws) that must be removed to make subsequent processing impossible or to significantly improve the surface properties of the product. It may deteriorate.

Conventionally, as a method for removing flaws in a belt-shaped metal body, a belt grinding-pickling treatment or the like has been carried out. In the belt grinding, a pretreatment process such as a metal belt shape correction is performed in order to improve the efficiency. However, there is a problem in that the number of steps is increased because a large number of grinding stands are arranged for heavy grinding, and therefore, a laminated roll type elastic grindstone has been recently adopted as a grinding tool.

In this laminated roll type grinding tool, an adhesive is applied to the surface of a cloth base material woven in a mesh shape, abrasive grains are sprinkled on the adhesive, and the resulting adhesive is fixed in a circular shape.
At the same time, a circular polishing cloth having a hole for passing the main shaft at the center is also manufactured, and an appropriate number of the circular polishing cloths are inserted into the rotary shaft, and then pressure-bonded and polymerized from both ends.

In such a grinding tool, the density of abrasive grains adhered to the mesh is small, and the problems such as non-uniformity and easy falling off are likely to occur, and some proposals have been made to improve the problems. For example, Jikkou 56-40524
In the publication, a polishing plate formed by applying abrasive grains to one surface of a reticulated base material is attached to the rotary shaft in a large number so that the abrasive grains do not abut against each other, and a large number of them are press-contact polymerized. By doing so, the adjacent abrasive grains bite into the polishing plate to sufficiently adhere to each other, and the abrasive grains are not divided by the base material, and a dense peripheral surface is formed to form a uniform abrasive grain surface. is doing. In Japanese Utility Model Publication No. 60-8936, a polishing sheet coated with abrasive grains is tilted with respect to the axis of a rotary shaft and pressure-contact-polymerized, so that uniform grinding can be performed without causing vertical lines of polishing leak. It is suggested to.

[0006]

As described above, efforts are being made to increase the abrasive grain density as much as possible and promote moderate wear to obtain stable grinding ability at all times. However, when trying to increase the load during grinding and try to grind the material to be treated, especially the metal surface, since the base material is a mesh and the adhesion area between the base material and the abrasive grains is small, the adhesion strength is weak, It is difficult to prevent the removal of the abrasive grains and the increase in the abrasion of the grindstone, which have been the above, and there is still a problem that the cost is significantly increased.

On the other hand, the wear of the grindstone depends on the grinding conditions. In grinding the strip-shaped metal body, various grinding is performed from light grinding to heavy grinding. Therefore, it is necessary to prepare a large amount of various kinds of grindstones having different wear characteristics depending on use conditions.

The present invention, in a grinding tool used for grinding a strip-shaped metal body or the like, uses the improved cloth base material capable of adjusting the density of the abrasive grains to be applied as a constituent member, thereby solving the above-mentioned problems of the current situation. It is an object of the present invention to solve the problems and provide a laminated roll type grinding tool suitable for grinding conditions.

[0009]

In order to achieve the above object, the present invention provides a grinding tool formed by combining a plurality of polishing cloths having abrasive grains applied and fixed to a mesh cloth base material and pressing them together. It is a laminated roll type grinding tool characterized by combining two or more types of circular polishing cloths having different thread densities (g / m ² ) forming the mesh of material. In the above-mentioned laminated roll type grinding tool, the thread density ratio between different kinds of polishing cloths used by pressing and combining different kinds of polishing cloths is the case when a polishing cloth with a thread density as conventionally used is the standard type. In addition, the high thread density polishing cloth is preferably 2 to 5 times as high as the standard type, and the tool composition ratio of the different type polishing cloth is 2 times as high as that of the standard type polishing cloth. It is preferable that the combination is 1 or less.

The present invention will be described in detail below based on the embodiments shown in the drawings. The grinding tool of the present invention is a grindstone having elasticity formed by polymerizing and laminating a polishing cloth in which abrasive grains are applied to a base material woven in a mesh shape, and combining two or more kinds of polishing cloths having different characteristics. By doing so, a grindstone having desired grinding ability and durability is obtained.

FIG. 1 shows a cross section of an ordinary mesh-abrasive cloth sheet. Reference numeral 1 denotes a cloth substrate, which is woven in a mesh shape. The mesh is, for example, a vinylon thread with a thickness of 10
It is formed by weaving at a rate of 5 pieces / inch and a width of 15 pieces / inch.
Is applied, and then the abrasive grains 4 are attached by an electrostatic method or a dropping method. Further, the adhesive 3 is applied, and then the abrasive grains 4 are pressure-bonded using a means such as a roll. After that, the adhesive is dried to form a sheet-shaped grindstone.

FIG. 2 shows a mesh polishing sheet having a higher thread density than the standard type mesh of the base cloth shown in FIG. That is, 5 is a high yarn density substrate, and its mesh is, for example, a woven fabric of a polyester and cotton mixed yarn having a thickness of 10 at a rate of 90 warp / inch and weft 50 / inch. The same method as in the case of FIG. 1 can be employed to apply and fix the abrasive grains 4 to the base material 5 to form a sheet-shaped grindstone. In order to suppress the wear of the grindstone, increase the number of threads constituting the base material, that is, the base material thread density (g
/ M ² ) is extremely effective because the amount of abrasive grains attached also increases. In the case of the above-mentioned ordinary mesh polishing cloth sheet (FIG. 1), the yarn density is about 80 g / m ² , and in the case of the mesh polishing sheet of high yarn density (FIG. 2), it is about 400 g / m ² .
It is g / m ² . In addition, in order to increase the thread density, there is a method of increasing the thread diameter to be woven.

FIG. 3 shows a polishing cloth 10 in which a mesh polishing cloth sheet is punched out in a circular shape, and a hole 6 through which a spindle 7 is inserted is provided in a central portion. As shown in FIG. 4, a plurality of circular polishing cloths 10 are sequentially inserted into the spindle 7, and pressed by a compression press (not shown) at a pressure of about 20 kg / cm ² with a flange 8 to press the spindle. 7 A nut 9 is screwed into a screw engraved on the surface of the flange to compress the flanges from both sides, and a circular polishing cloth 10 is pressure-contact polymerized to complete a laminated roll type grinding tool. At this time, in the present invention, the polishing cloth made of the base material 1 having a low thread density and the polishing cloth made of the base material 5 having a high thread density are polymerized in a specific ratio. FIG. 5 is an enlarged view of an example (two blocks) of laminated polishing cloths. Two polishing cloths A composed of a base material 1 having a low yarn density and a polishing cloth composed of a high base material 5 are shown. Combined with B1 sheet. In addition, the yarn density of the base material mesh of the polishing cloths A and B is shown in FIG.
In the case of the configuration shown in FIG. 2, A: B is 1: 5.

In order to increase the abrasive grain density, it is important not only to increase the amount of adhesive but also to increase the substrate density.
(Even with the same substrate density, it is also effective to increase the number of shots with a thin thread to reduce the porosity.) On the other hand, increasing the substrate density can increase the amount of abrasive grains,
Further, the grinding ability can be increased in order to increase the adhesive force between the abrasive grains and the base material, but if the base material density is too high, the grinding force (shaving allowance) is reduced, which has the opposite effect. A practical substrate density is in the range of 1: 5.

It is only necessary to prepare two or more kinds of polishing cloths having different thread densities as appropriate, and a grinding tool is constituted by appropriately selecting and combining different kinds of polishing cloths from each other to meet the intended grinding conditions. You can select the grinding tool to be used.
Therefore, it is possible to manufacture a roll-shaped grinding tool having different grinding characteristics according to the grinding conditions of the destination, so that the application can be expanded from light grinding to heavy grinding.

[0016]

As described above, according to the present invention, by appropriately combining two or more kinds of polishing cloths having different wear characteristics, it is possible to meet a wide range of needs for grinding and polishing metal strips such as stainless hot-finished steel strips. Made it possible to match. Further, the use of a mesh base material having a high thread density also increases the adhesion of abrasive grains, and a grinding tool using such a polishing cloth in combination improves the grinding ability and the life.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a cross section of an abrasive sheet having a small mesh yarn density used in the present invention.

FIG. 2 is an explanatory view showing a cross section of an abrasive sheet having a high mesh yarn density used in the present invention.

FIG. 3 is a plane surface of a circular polishing sheet used in the present invention.

FIG. 4 is an explanatory view showing an enlarged polishing cloth of the laminated roll-shaped grinding tool of the present invention.

FIG. 5 is an enlarged view of a part of FIG.

[Explanation of symbols]

 1 Cloth base material of small yarn density mesh 2 Primary adhesive 3 Secondary adhesive 4 Abrasive grain 5 Cloth base material of large yarn density mesh 6 Insertion hole 7 Shaft 8 Flange 9 Nut 10 Polishing cloth

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Tanaga 3434 Shimada, Hitsu-shi, Yamaguchi Pref., Nippon Steel Co., Ltd. Hikari Steel Works (72) Inventor Haruo Oguro 3434, Shimada, Hikari-shi, Yamaguchi Pref. Nippon Steel Co., Ltd. in the Hikari Steel Works (72) Inventor Yoshifumi Takai 3434 Shimada, Hikari City, Yamaguchi Prefecture Nippon Steel Co., Ltd. in the Hikari Works (72) Inventor Takahiro Fujiwara 3434 Shimada, Hikari City, Yamaguchi Prefecture Nippon Steel Co., Ltd., Hikari Steel Works (72) Inventor Kazuo Muraoka 3434 Shimada, Hikari City, Yamaguchi Prefecture Nippon Steel Co., Ltd., Hikari Steel Works (72) Inventor, Isamu Shimizu 2-2, Izumi, Okegawa, Saitama Prefecture −18 Sankyo Rikagaku Co., Ltd. Okegawa Factory (72) Inventor Susumu Suto 2-2-18 Ikegawa, Saitama Prefecture Sankyo Rikagaku Co., Ltd. Okegawa Factory

Claims (1)

[Claims] 1. A grinding tool formed by combining and pressing a plurality of polishing cloths having abrasive grains applied and fixed to a mesh cloth base material,
A laminated roll type grinding tool comprising a combination of two or more kinds of abrasive cloths having different thread densities (g / m ² ) forming the mesh of the cloth base material.