JPH0647677A - Laminate roll type grinding tool and its manufacture - Google Patents

Abstract

PURPOSE:To provide various laminate roll type grinding tools at a low cost by forming a wide abrasive cloth in a roll form as keeping in a belt form, or furthermore, by cutting the roll form abrasive cloth into slices with a specific width, in a grinding tool used for grinding a belt form metallic body and the like. CONSTITUTION:In this laminate roll type grinding tool and its manufacturing method, a belt form sheet base body 5 to which an abrasive is applied and fixed at least on one side is wound and laminated on a main shaft 6 to form a spiral roll, and then, the laminated belt form sheets are adhered to compose the grinding tool. Furthermore, various laminate roll type grinding tools with a narrow width can be obtained by cutting a wide grinding tool made by such a way in a specific width square to the axial direction.

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 a method for producing the same, and more particularly, to a hot-finished stainless steel strip or the like. The present invention relates to a laminated roll type grinding tool for effectively removing oxide scales and flaws formed on the surface of a strip-shaped metal body, and a method for manufacturing the same.

[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 for subsequent processing or the surface properties of the product to deteriorate significantly. There is a case.

Generally, in a grindstone for grinding the surface, an abrasive, an adhesive and other additives are mixed at a fixed ratio, poured into a mold and press-molded under high pressure to bond the abrasive grains 4 as shown in FIG. Since it is a solid body of a certain shape that is densely embedded with the agent 3 etc., it lacks elasticity and structurally there is no chip pocket formed between the abrasive grains, so the grinding ability is improved. Inferior

Therefore, a belt-shaped grinding tool is used to grind a strip of metal or the like. However, when using a belt grinding method to remove flaws in a strip-shaped metal body, pretreatment steps such as metal strip shape correction are required to improve the grinding efficiency. Since there is a problem that the number of steps is increased due to the arrangement of the blades, 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 adhesive is fixed, and punched into a circle.
At the same time, a circular polishing cloth with a hole through which the rotary shaft passes is punched out, and a suitable number of circular polishing cloths are inserted into the rotary shaft, and then pressure-bonded and polymerized from both ends.

[0006] In such a grinding tool, there are problems that the density of the abrasive grains attached to the mesh is small, it is not uniform, and it easily falls off, and several proposals have been made to improve it. For example, in Japanese Utility Model Publication No. 56-40524, a polishing plate formed by applying abrasive grains to one surface of a reticulated base material is applied to a rotary shaft with the coated surfaces facing in the same direction so that the abrasive grains do not abut. Adhesion of a large number of particles by adhering to each other and adhering to each other by pressure polymerization results in sufficient adhesion of the polishing plate, and the abrasive particles are not divided by the base material. Are disclosed. Further, 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 is pressure-contact polymerized, whereby uniform grinding can be performed without generating vertical streaks of grinding leakage. It is suggested to.

[0007]

As described above, efforts have been made to increase the abrasive grain density as much as possible and to promote moderate wear so that the grinding ability is always stable, but in any case. , The abrasive cloth is punched in a circle from a band-shaped sheet to which abrasive grains are adhered, and a polishing cloth having a shaft insertion hole is formed. Therefore, a large amount of unnecessary parts are generated by the punching, which causes a disadvantage that the manufacturing cost is increased. . Therefore, it is required for this type of grinding tool to reduce the raw material loss as much as possible and reduce the cost.

According to the present invention, in a grinding tool used for grinding a strip-shaped metal body or the like, a wide polishing cloth (sheet base) is formed into a roll shape in a strip shape, or the forming roll is narrowed to a predetermined width. By cutting into width,
It is an object of the present invention to solve the above-mentioned current problems and to provide various laminated roll type grinding tools with excellent grinding ability at low cost.

[0009]

In order to achieve the above object, the present invention provides (1) forming a spiral roll by winding and laminating a strip-shaped sheet substrate having an abrasive applied and fixed on at least one surface thereof around a main shaft. And a laminated roll type grinding tool characterized in that the laminated strip-shaped sheet substrates are adhered to each other, and (2) a strip-shaped sheet substrate to which an abrasive is applied after applying an adhesive on at least one surface. A laminated roll type characterized by further applying an adhesive to the sheet substrate and then winding and laminating it along the surface of the spindle to form a spiral roll, and drying the roll to cure the adhesive. Manufacturing method of grinding tool. And (3) a hot-melt strip-shaped sheet substrate having an abrasive applied to at least one surface thereof is wound and laminated along the surface of the spindle to form a spiral roll, and the roll is heated. A method for manufacturing a laminated roll type grinding tool, characterized in that it is cured by adhesion. Further, the present invention is also characterized in that the wide laminated roll type grinding tool formed as described above is cut into a predetermined width at right angles to the axial direction to obtain various narrow width laminated roll type grinding tools. Can be one. In this way, the loss of raw materials should be minimized, that is, about 10
Since 0% raw materials can be used, low-cost grinding tools can be manufactured.

The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 shows a roll-shaped grinding tool (hereinafter referred to as a roll grindstone) 1 of the present invention. As shown in FIG. 2, a sheet 2 is coated with an adhesive agent 3 and an abrasive grain 4 is adhered onto the sheet 3 to form a wide width. The sheet substrate 5 is further coated with the adhesive 31 on the surface to which the abrasive grains are adhered, and then spirally wound and laminated along the surface of the main shaft 6, and the layers are adhered to form a roll. The sheet 2 may be cloth, paper, film, woven cloth, non-woven cloth, or the like, and its material is not limited as long as it is a wide and thin elastic body. On such a sheet 2, abrasive grains 4 are adhered to one side or both sides, but chip pockets are formed between the abrasive grains 4 protruding from the adhesive surface,
This improves the grinding ability.

FIG. 3 shows a method of manufacturing the sheet substrate 5, in which the abrasive grains 4 sent from the hopper 8 fall onto a conveyor 10 provided with a positive electrode 9 for generating electrostatic force, and the conveyor 10 causes the abrasive particles 4 to drop. While being conveyed, a negative electrode 91 is provided on the sheet conveying line 11 at a position opposite to the positive electrode 9, and the electrostatic force generated between the two electrodes 9 and 91 is conveyed by a feed roll 12 to apply the adhesive 3. Abrasive grains 4 are suction-adhered to the sheet 2. As another method for manufacturing the sheet base 5, as shown in FIG. 4, the abrasive grains 4 are dropped onto the sheet 2 coated with the adhesive 3 by being conveyed by the feed roll 12 from the hopper 8 provided on the sheet conveying line. There is also a method of bonding.

The above-mentioned method for producing the sheet substrate 5 is generally used, but the present invention is characterized in that a roll grindstone is obtained by using the sheet substrate 5. That is, as shown in FIG. 5, in the roll grindstone forming line,
The wide continuous sheet substrate 5 wound up is unwound, guided to the adhesive melting tank 13 while conveying the sheet substrate 5 by the feed roll 12, and guided by the guide roll 14 to be dipped in the molten adhesive to remove the adhesive. After applying on both surfaces or one side,
After passing through the squeeze roll 15, remove excess adhesive,
After that, the sheet base 5 is wound around the surface of the main shaft 6 made of a tube made of iron or bakelite while tensioning and pressurizing, and the roll base is formed by successively winding and laminating the sheet base 5 in a spiral shape so as to have a predetermined diameter. To do. After that, this roll grindstone 1
Is placed in a drying furnace (not shown) to dry and solidify the adhesive to complete a roll grindstone in which the spindle 6 and the laminated sheet substrate 5 are integrated as shown in the sectional view of FIG.

When a hot-melt material is used as the sheet 2 constituting the sheet substrate 5, the hot-melt sheet is melted by the heat of drying during drying, so that the laminated sheet substrates 5 are bonded to each other. The adhesive applying step shown in FIG. 5 can be omitted.

In this way, the present invention manufactures a laminated roll type grinding tool, but the manufacturing line for the sheet substrate 5 shown in FIG. 3 or 4 and the manufacturing process for the roll grindstone shown in FIG. 5 may be continued. .

FIG. 6 shows an example in which the band-shaped metal body 16 is ground by using a grinding tool composed of the wide roll grindstone 1 of the present invention. However, a narrow-width roll grindstone may be required depending on the object to be ground. FIG. 7 shows a case where a narrow roll grindstone 18 is formed by cutting a wide roll grindstone with a slicing blade 17 at right angles to the axial direction of the grindstone in a so-called sliced shape. By setting the width of cutting to a predetermined size, it is possible to obtain roll grindstones of various desired sizes.

[0016]

As described above, according to the present invention, a laminated roll type grinding tool can be manufactured extremely economically without material loss, and the roll diameter can be set to a desired size by selecting the number of windings. Can be adjusted. When the grinding tool is used, the grindstone surface of the structure having deep chip pockets is sequentially exposed as the grindstone wears, and this is always maintained, so that the grinding ability is not deteriorated. Further, since the constituent sheet has elasticity and is wide, it fits to the entire width of the wide band-shaped metal body such as stainless steel, and polishing and grinding can be performed efficiently and reliably. Furthermore, there is a great effect that a desired narrow width elastic roll grindstone which is used differently can be easily supplied by slicing the wide roll grindstone.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a grinding tool (roll grindstone) of the present invention.

FIG. 2 is an explanatory view showing an example of a sheet base constituting a roll grindstone of the present invention.

FIG. 3 is an explanatory view showing a production example of a sheet substrate used in the present invention.

FIG. 4 is an explanatory view showing another production example of the sheet substrate used in the present invention.

FIG. 5 is an explanatory view showing an example of a manufacturing process of a roll grindstone stack of the present invention.

FIG. 6 is a view showing an example of using the roll grindstone of the present invention.

FIG. 7 is an explanatory view showing an example of manufacturing the narrow-width roll grindstone of the present invention.

FIG. 8 is a sectional view showing a conventional grindstone.

[Explanation of symbols]

 1 Roll Grinding Stone 2 Sheet 3,31 Adhesive 4 Abrasive Grain 5 Sheet Substrate 6 Spindle 7 Chip Pocket 8 Hopper 9,91 Electrode 10 Conveyor 11 Sheet Conveying Line 12 Feed Roll 13 Adhesive Melting Tank 14 Guide Roll 15 Squeeze Roll 16 Strip Metal Body 17 Slice knife 18 Narrow roll grindstone

 ─────────────────────────────────────────────────── ─── 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 (4)

[Claims] 1. A belt-shaped sheet base body having an abrasive applied and fixed on at least one surface thereof is wound and laminated on a main shaft to form a spiral roll, and the laminated belt-shaped sheet base bodies are adhered to each other. Multi-layer roll type grinding tool. 2. A narrow-roll laminated-roll type grinding tool, characterized in that the laminated-roll-type abrasive tool according to claim 1 is cut into a constant width at right angles to the axial direction. 3. A belt-shaped sheet substrate having an abrasive applied to at least one surface thereof, and further having an adhesive applied to the sheet substrate, and then wound and laminated along the main shaft surface to form a spiral shape. A method for producing a laminated roll type grinding tool, comprising forming a roll and drying the roll to cure the adhesive. 4. A hot-melt strip-shaped sheet substrate having an adhesive applied to at least one surface thereof and an abrasive attached thereto,
A method for producing a laminated roll type grinding tool, which comprises winding and laminating along a surface of a spindle to form a spiral roll, and heating the roll to bond and cure the roll.