RU2574567C2 - Grinding device for metal product grinding - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: grinding device contains at least two grinding units with the bearing device for the grinding unit containing at least one rotated grinding wheel. The grinding wheels are arranged directly one next to another so that their axes of rotation pass in parallel to each other in the horizontal direction and at the pre-set distance from each other.

EFFECT: high speed of grinding of metal products.

9 cl, 4 dwg

Description

The invention relates to a grinding device for grinding a metal product, in particular a continuously cast slab, square billet or ingot.

Continuously cast products, in particular slabs, in most cases after continuous casting are subjected to surface treatment by grinding in order to achieve sufficient quality during further processing of the product. When grinding a continuously cast slab, it usually moves in a reverse motion in the reverse direction under the grinding device (grinding unit). At the end of each reverse movement, the grinding device makes a periodic movement of the transverse feed until the entire surface of the slab is polished. During grinding, the slab is installed on the grinding table, resting on it with its long wide side.

A device for grinding slabs of this type is described in EP 0053274 A.

With the so-called HP-grinding (High-Pressure grinding - grinding under high pressure), for economic reasons, a sufficient metal removal rate should be achieved. At the same time, grinding performance is increased by increasing the width of the grinding wheel, if the drive power of the engine is simultaneously increased, for example, from 315 kW to 630 kW when doubling the width of the grinding wheel; due to this, it is possible to maintain a constant specific power of the engine with respect to the width of the grinding wheel. However, the width of the grinding wheel is limited by the manufacturing process and the strength of its ligament; in practice, grinding wheels with a width of more than 150 mm are not used.

Therefore, it has become known to use several, in particular two, grinding wheels next to each other on the same grinding spindle. However, the following drawback arises in this case: when grinding, the contact zone between the grinding wheel and the grinding product moves along the width of the grinding wheel, namely, it moves periodically back and forth, which is caused by the reversal of the slab, from the corresponding outer edge of the grinding wheel to its middle. Therefore, the expansion of the contact zone and the increase in drive power do not necessarily lead to the desired increase in grinding performance, and, under certain conditions, only to increase the resistance of the grinding wheel (circles).

Therefore, it cannot be assumed that the use of double grinding wheels on one drive spindle with doubled drive power will also lead to a double removal speed.

The basis of the invention is the task of creating a grinding device, in which the aforementioned increase in drive power would directly lead to an increase in the removal rate. In accordance with this, the profitability of the grinding process of metal products such as slabs, square billets and ingots should be increased.

This problem is solved according to the invention, due to the fact that the grinding device contains at least two grinding units, each grinding unit comprising a support device for the grinding unit, the grinding unit contains at least one rotatable grinding wheel, and the grinding wheels are located so that their axis of rotation is parallel to each other.

The carrier device is preferably mounted rotatable around an axis that is parallel to the axis of rotation of the grinding wheel and is located at a distance from it. In this case, means can be provided with which you can adjust the distance between the axis of rotation of the carrier and the axis of rotation of the grinding wheel. These means for adjusting the distance can be made preferably in the form of an eccentric.

In one alternative solution, it is provided that each carrier device includes a linear guide with which the grinding wheel can be moved perpendicular to its axis of rotation and preferably horizontally.

In addition, each grinding unit may comprise a loading device for applying a specific pressing force to the grinding wheel to the metal product, the loading device including, in particular, a cylinder-piston system for applying a grinding force.

The grinding units can be mounted rotatably together around an axis that is perpendicular to the axis of rotation of the grinding wheels and vertically, the axis of rotation being preferably in the area of the grinding wheels, in particular between the grinding wheels of both grinding units.

The grinding wheels of the grinding units are preferably located directly next to each other. They may have different granularity and / or structure.

The grinding wheel can be driven into rotation by a drive motor without an intermediate gear or other elements primarily directly.

Thanks to the proposed solution, it is achieved that increasing the drive power of the grinding device directly leads to a proportional increase in grinding power (grinding speed). This makes it possible to distribute the grinding power among the grinding wheels so that each grinding wheel has its own contact zone.

An example embodiment of the invention shown in the drawings, which represent:

FIG. 1 is a schematic side view of a grinding unit of a grinding device;

FIG. 2 is a schematic view “X” of the grinding unit of FIG. one;

FIG. 3 is a schematic top view of a grinding device with two grinding units;

FIG. 4 is an enlarged view of the area of the grinding wheels of the grinding device of FIG. 3.

In FIG. 1 and 2 show the grinding unit 3, 4, which is an integral part of the grinding device 1 shown in FIG. 3.

The grinding unit 3, 4 comprises a supporting device 5, 6, made in the form of a pendulum console with a counterweight 19. The supporting device 5 is mounted for rotation around the axis C, D. The grinding unit 3, 4 comprises a grinding unit 7, 8 and a grinding wheel 9, 10, driven directly by the drive motor 11, 12. The grinding wheel rotates about axis A, B.

To influence the desired clamping force F on the grinded metal product 2, only a schematically indicated load device 14 is provided, made, for example, in the form of a cylinder-piston system.

Means 13 are also schematically indicated, with which you can change the distance between the axis of rotation C, D and the axis of rotation A, B. In this case, the axis of rotation A, B can be adjusted or offset relative to the axis of rotation C, D in the horizontal direction H by means of an eccentric.

Grinded material, that is, a metal product 2, moves reciprocally under the grinding wheel 9, 10, which is indicated by the direction of movement G of the product 2.

In FIG. 3 shows the entire grinding device 1, and the direction of movement G made by the product 2 during the grinding course is also indicated. It can be seen that both supporting devices 5, 6, that is, both pendulum consoles, are parallel to each other, and at their ends there is one grinding block 7, 8 with a grinding wheel 9, 10. By means of only the schematically designated eccentric 14, it is possible to change the position of the grinding of the wheel 9, 10 in the horizontal direction, that is, it is possible to slightly change the distance a, b between the axis of rotation C, D of the carrier 5, 6 and the axis of rotation A, B of the grinding wheel 9, 10. The horizontal offset H created by the eccentric 14 started e ₁ and e ₂ . If both eccentrics of both supporting devices 5, 6 are adjusted with an offset relative to each other in the horizontal direction H, then between the grinding wheels 9, 10 there is a distance in the horizontal direction H corresponding to the sum of e ₁ and e ₂ .

In addition, it is envisaged that the entire grinding device 1 can be rotated around an axis E extending in the vertical direction V. The rotation angle relative to the longitudinal axis (perpendicular to the axis of rotation C, D and in this case in the horizontal direction H) is designated α and is 90 °. In this case, the axis of rotation E is between the two grinding wheels 9, 10.

In FIG. Figure 4 shows the desire to place both grinding wheels 9, 10 as close to each other as possible. They are mounted on the landing gear 15, 16. The grinding wheels 9, 10 are fixed by means of a fastening ring 17, 18. There is only a narrow gap between the two grinding wheels 9, 10. In accordance with this, there is the smallest possible distance between them, which is limited only by the width of the mounting rings 17, 18 and a small free space between them.

In particular, if grinding is carried out at an angle α 0-90 °, preferably 45-90 °, then both grinding wheels 9, 10 are ground one after another with respectively separate contact zones with the product 2.

If both (or more) grinding wheels are made with different grit and / or structure, then it is preferable to carry out two operations simultaneously. Thus, a grinding wheel with a larger / coarser grain may first perform a rough grinding operation followed by a fine grinding operation performed by a grinding wheel with finer grain.

Preferably, a direct grinding wheel drive is provided, mounted directly on the drive shaft of the drive electric or hydraulic motor.

It may also be provided that the drive is carried out indirectly through gears, V-belts, spindles and the like.

In this regard, it should be noted that it is preferable for each grinding unit to provide a grinding unit with its own drive motor. If the said indirect type of drive is provided, it is also possible that a single drive motor drives at least two grinding wheels.

If a grinding grinding operation or other special grinding operation is to be performed, then only one grinding wheel may be provided.

Each of the grinding blocks 7, 8 can be equipped with more than one grinding wheel 9, 10.

List of Reference Items

1 - grinding device

2 - metal product (slab, square billet, ingot)

3 - grinding unit

4 - grinding unit

5 - supporting device (pendulum console)

6 - supporting device (pendulum console)

7 - grinding block

8 - grinding block

9 - grinding wheel

10 - grinding wheel

11 - drive engine

12 - drive engine

13 - means for adjusting the distance (cam)

14 - load device (cylinder-piston system for applying grinding force)

15 - landing gear for grinding wheel

16 - landing gear for grinding wheel

17 - a fixing ring

18 - fixing ring

19 - counterweight

A - axis of rotation of the grinding wheel

B - axis of rotation of the grinding wheel

C - axis of rotation of the carrier

D - axis of rotation of the carrier

E - axis of rotation of the grinding device

G - direction of movement of the metal product

α is the angle

a is the distance

b is the distance

e ₁ - eccentricity

e ₂ - eccentricity

F - downforce

H - horizontal direction

V - vertical direction

Claims (9)

1. A grinding device (1) for grinding a metal product, in particular a continuously cast slab, square billet or ingot, containing at least two grinding units (3, 4) with a carrier (5, 6) for the grinding block (7 8), moreover, the grinding unit contains at least one rotatable grinding wheel (9, 10), characterized in that the grinding wheels (9, 10) of the grinding units (3, 4) are located directly next to each other so that their axis (A, B) rotations run parallel to each other Yeah in the horizontal direction and at a given distance from each other. 2. The device according to claim 1, characterized in that each carrier device (5, 6) is mounted rotatably around an axis (C, D), which is parallel to the axis (A, B) of rotation of the grinding wheel (9, 10) and is located at a distance (a, b) from it. 3. The device according to claim 2, characterized in that means (13) are provided that are capable of adjusting the distance (a, b) between the axis of rotation (C, D) of the carrier (5, 6) and the axis (A, B) grinding wheel rotation (9, 10). 4. The device according to claim 3, characterized in that the means (13) for adjusting the distance (a, b) include an eccentric. 5. The device according to claim 1, characterized in that each supporting device (5, 6) includes a linear guide made with the possibility of moving the grinding wheel (9, 10) perpendicular to its axis of rotation (A, B). 6. The device according to any one of paragraphs. 1-5, characterized in that each grinding unit (3, 4) contains a loading device (14) for applying a specific clamping force (F) of the grinding wheel (9, 10) to the metal product (2), and the loading device (14) includes, in particular, a piston-cylinder system for applying a grinding force. 7. The device according to any one of paragraphs. 1-5, characterized in that the grinding units (3, 4) are mounted with the possibility of rotation together around the axis (E), which is perpendicular to the axis of rotation (A, B) of the grinding wheels (9, 10) and vertically, and the axis of rotation ( E) lies preferably in the area of the grinding wheels (9, 10), in particular between the grinding wheels (9, 10) of both grinding units (3, 4). 8. The device according to any one of paragraphs. 1-5, characterized in that the grinding wheels (9, 10) of the grinding units (3, 4) have different grain size and / or structure. 9. The device according to any one of paragraphs. 1-5, characterized in that the grinding wheel (9, 10) is installed with the ability to drive directly the drive motor (11, 12) without an intermediate gear.

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