JPH0691500A - Grinding device of belt-form metal body - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a grinding device for a strip-shaped metal body, which is capable of supporting a press roll from the rear side to prevent the roll from bending and also to prevent vibration. To do. In a grinding device in which a grinding roll and a press roll are paired, at least one small-diameter support roll disposed on the non-grinding roll side of the press roll so as to come in contact with and separate from the axial intermediate portion of the roll is provided. The gist is a belt-shaped metal body grinding device provided with a stopper. The pair of small-diameter support rolls of the above-mentioned swinging device are arranged in parallel in the circumferential direction of the pressing roll, and a plurality of them are arranged at intervals in the axial direction of the pressing roll. The roll may be installed so as to be swingable in the circumferential direction of the press roll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention adjusts a variation of a press roll when a strip-shaped metal body is continuously ground by a roll-shaped grinding tool paired with a press roll (hereinafter referred to as a grinding roll). The present invention relates to a belt-shaped metal body grinding apparatus.

In the present specification, the term "band-shaped metal body" refers to a hot-rolled sheet (band) or coil made of stainless steel, ordinary steel, titanium and its alloys, high alloys, etc. by a conventional method, or thin-wall continuous casting. It means a plate (band) or a coil that is wound up.

[0003]

2. Description of the Related Art In the process of manufacturing a strip-shaped metal body, heating of the slab and subsequent hot rolling, thin cast slab continuous casting, or the like, or further after annealing or annealing and pickling, oxide scale or a scale is formed on the surface of the strip-shaped metal body. Since surface flaws occur, steps are required to remove these and finish the surface.

In order to meet such demands, conventionally, a band-shaped metal hot-rolled sheet before cold rolling or after annealing it, the front and back surfaces of the sheet are ground with a belt type grinding tool to remove flaws and surface. The method (hereinafter, referred to as belt grinding) for smoothing was used. In this belt grinding, a method of grinding the surface of the strip-shaped metal body by a rotary endless belt is mainly used, but this method has a low plate passing speed, has a short belt life, and requires frequent belt replacement, so workability is low. bad.
In other words, the belt has a time-dependent grinding performance, and the abrasive grain material wears with the lapse of time, so that there is a problem that the surface quality after grinding varies with the grinding time. Further, since the grinding amount sharply decreases with the grinding time, the complicated work of exchanging the belt for each coil has been forced. Moreover, there is a problem that uniform grinding cannot be performed unless the plate shape before grinding is flat.

The present inventors, in place of the above belt grinding,
Using a roll-type grinding tool (hereinafter, referred to as a grinding roll) having high efficiency and high workability, a manufacturing process capable of obtaining a strip-shaped metal body having an excellent surface property without uneven gloss was examined. The grinding stone of the grinding roll spontaneously drops off the worn abrasive grain material, and instead a new abrasive grain material comes out, so that the time dependency of the grinding performance is extremely small, and highly efficient grinding is possible. In addition, since the tool is a roll type, its replacement can be automated, and the tool life is longer than that of the belt type, which improves workability and has high practical value.

The use of grinding rolls for grinding steel strip surfaces is not new per se. For example, JP-A-3-863
Japanese Unexamined Patent Publication No. 18 discloses an equipment for removing surface flaws on a stainless steel strip by combining an elastic grinding device (roll type) and a belt grinding device in the subsequent stage. Further, in Japanese Unexamined Patent Publication No. 1-273607, a steel strip surface is ground using a first grinding roll and a second grinding roll whose abrasive grain counts are successively increased, and smoothing is performed, followed by pickling. It discloses that the load is reduced.

[0007]

This type of grinding roll is paired with a pressing roll, and grinding is carried out while passing a belt-shaped metal body between both rolls. The support roll is made of a highly rigid material. The upper and lower work rolls of a steel plate rolling machine or the like are directly supported by back-up rolls behind them or indirectly via intermediate rolls, and have a structure capable of sufficiently resisting reduction. However, since the pressing roll of the grinding device is used alone as described above, the bending of the roll due to the grinding load is unavoidable. For example, the bending of the pressing roll 2 schematically shown in FIG. 3 is generated. Makes the fit between the strip-shaped metal body 3 and the grinding roll 1 poor, and uniform grinding cannot be performed. Such a bending becomes larger as the body length of the grinding roll becomes longer, and becomes remarkable especially in the grinding roll having a length of 1000 mm or more. Also, grinding rolls cause mechanical vibrations due to chatter marks and motors due to unbalances such as shape and eccentricity, but it is difficult to effectively suppress this with only conventional press rolls, and it is considered that the rigidity is increased. However, there is a limitation in space, and there is a problem that sufficient measures against vibration by the press roll cannot be achieved at present.

The present invention solves such a problem, and the pressing roll is supported from the rear side so that
It is an object of the present invention to provide a belt-shaped metal body grinding device capable of suppressing bending of a wide grinding roll of 0 mm or more and also preventing chatter marks and mechanical vibrations.

[0009]

In order to achieve the above object, the present invention is a grinding device in which a grinding roll and a pressing roll are paired with each other. The gist of the present invention is a belt-shaped metal body grinding device provided with a vibration damping device having at least one small-diameter support roll arranged so as to be able to come into contact with and separate from the. The pair of small-diameter support rolls of the swing-off device are arranged in parallel in the circumferential direction of the press roll, and a plurality of them are arranged at intervals in the axial direction of the press roll, and further, the swing-off device thus arranged. It is a preferable embodiment that the small-diameter support roll is installed so as to be swingable in the circumferential direction of the pressing roll.

[0010]

The present invention will be described in detail below with reference to the following embodiments shown in the drawings. FIG. 1 is a schematic front view of the present invention, in which reference numeral 1 denotes a grinding roll, which is an elastic grindstone roll, that is, a roll-shaped grindstone having a certain degree of elasticity in order to easily conform to the shape of a plate. , Which are formed by laminating discs coated with abrasive grains to form a roll (lamination type),
There are those in which flap wheels are laminated and formed into a roll shape (flap type), nylon resin containing abrasive grains is integrally formed into a roll shape (integrated type), and any of these can be adopted. Reference numeral 2 is a pressing roll, which travels while supporting a strip-shaped metal body 3 as a material to be ground between the grinding roll 1. Reference numeral 4 denotes a swinging device, which is installed on the side of the pressing roll 2 opposite to the grinding roll. The apparatus includes a header mechanism 7 that supports small-diameter support rolls 5 and 6 (hereinafter, referred to as small-diameter rolls) that come in contact with and separate from the axially intermediate portion of the press roll 2.
A supporting member 8 connected to the header mechanism 7, an elevating device 10 such as a hydraulic cylinder having a rod 9 connected to the supporting member 8 for elevating and lowering the member 8, and both end portions of the supporting member 8 are supported. And a support member 11 which is parallel to and stable to the presser roll and which moves up and down following the rod 9. In the figure, 12 is a lower structural material.

The header mechanism 7 is fixed to a swing member 13 for rotatably pivoting the small-diameter rolls 5 and 6, and a support member 8, and the swing member 13 is rotated in the circumferential direction of the pressing roll 2. In order to be possible, the oscillating member 13 is composed of a supporting shaft member 15 which supports a supporting point portion by a shaft 14. FIG. 2 is a schematic view showing an example of the side surface of FIG. 1, in which two small-diameter rolls 5a (6
a) and 5b (6b) are axially fixed to the swing member 13, and the fulcrum of the swing member 13 is rotatably supported by the support shaft member 15 fixed to the support member 8 via the shaft 14. Is shown.

The pressing roll 2 is used alone, and when it is ground, the bending as shown in FIG. 3 occurs. When this bending occurs, the conformity between the strip-shaped metal body 3 and the grinding roll 2 deteriorates, that is, the contact is insufficient and uniform grinding cannot be performed.
In such a case, the present invention operates the elevating device 10, for example, a hydraulic cylinder to raise the piston rod 9 and, at the same time, via the support member 8 and the support shaft member 15, the swinging member 1
By raising 3 to bring the small-diameter rolls 5 and 6 into contact with the pressing roll 2 and holding it at a predetermined position by hydraulic pressure, the bending of the rolls is suppressed. At this time, since the two small diameter rolls 5 and 6 are arranged in parallel in the circumferential direction of the pressing roll 2 and are in contact with each other, the swinging member 13 is a point that satisfies the balance of forces at the small diameter rolls 5a and 5b and their fulcrums (shaft stop points). Becomes stable at (position),
Even if there is a deviation between the center of the header device 7 and the center of the pressing roll 2, it is possible to make contact at two points in the circumferential surface direction of the pressing roll 2 according to the deviation due to the action of the swing member 13. Further, in the above example, the small-diameter rolls 5 and 6 are installed in two steps at intervals in the axial direction of the press roll 2, but by setting this interval to an appropriate length, the bending of a long roll Especially effective for prevention. However, the present invention is not limited to this, and may be arranged in one stage.

When a band-shaped metal body (plate) was ground by using an elastic grindstone roll having a length of 1200 mm which is paired with the press roll, the bending of the press roll was 140 μm or more, and the conformity between the plate and the grindstone was deteriorated and the plate width was increased. The grinding was uneven in the direction. On the other hand, when the backup device as shown in FIGS. 1 and 2 is arranged on the press roll 2 and the press roll 2 is brought into contact with and supports the small-diameter rolls 5a, 5b and 6a, 6b, the deflection of the press roll is 3 μm. As shown below, the plate and the grindstone fit together well, enabling uniform grinding.

[0014]

As described above, according to the present invention, the holding roll is provided with the vibration-proof device, and the holding roll is supported by the small-diameter roll that can be brought into contact with and separated from the holding roll. Therefore, it is possible to stably perform the grinding process to manufacture a strip-shaped metal product having a good surface quality after grinding.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a grinding apparatus of the present invention.

2 is an explanatory side view of FIG.

FIG. 3 is an explanatory view showing a grinding situation.

[Explanation of symbols]

 1: Grinding roll 2: Pressing roll 3: Band-shaped metal body 4: Shaking device 5, 6: Small diameter roll 7: Header mechanism 8: Supporting member 9: Rod 10: Lifting device 11: Bearing device 12: Lower structure agent 13: Swing member 14: Shaft 15: Spindle member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Haruo Oguro 3434 Shimada, Hitsu-shi, Yamaguchi Pref., Nippon Steel Co., Ltd. Hikari Steel Works (72) Inventor Takahiro Fujiwara 3434 Shimada, Hikari-shi, Yamaguchi Pref. Inside the Hikari Steel Works, Ltd. (72) Fumio Fudaken, Inventor Fumio 3434 Shimada, Hikari City, Yamaguchi Prefecture Shin-Nippon Steel Co., Ltd. Inside the Hikari Works, Japan (72) Yoshifumi Takai, 3434 Shimada, Hikari City, Yamaguchi Prefecture Nippon Steel Co., Ltd. Hikari Steel Co., Ltd. (72) Inventor Kazuya Okawara 30 Shodozaka, Miai-cho, Okazaki-shi, Aichi Nisshinbo Co., Ltd.

Claims (4)

[Claims] 1. A grinding device in which a grinding roll and a press roll are paired with each other, and at least one support roll arranged on the non-grinding roll side of the press roll so as to be able to come into contact with and separate from an axial intermediate portion of the roll. An apparatus for grinding a strip-shaped metal body, which is provided with an anti-vibration device. 2. The grinding device for strip metal bodies according to claim 1, wherein a pair of support rolls of the vibration proof device are arranged in parallel in the circumferential direction of the press roll. 3. The grinding device for a strip-shaped metal body according to claim 1, wherein a plurality of supporting rolls of the vibration isolator are arranged at intervals in the axial direction of the pressing roll. 4. The grinding device for a strip-shaped metal body according to claim 1, wherein the supporting roll of the vibration isolator is installed so as to be swingable in the circumferential direction of the pressing roll. .