JPH10263997A - End face grinding device for mold roll in continuous casting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate grinding operations with mold rolls made identical in width, and concurrently, closely attach short side weirs onto both end faces when the short side weirs are pressed onto the end faces of the mold rolls for the sake of casting operations. SOLUTION: A disc shaped grinding wheel is rotatably mounted to a supporting base 11 by way of a pivot member 12, concurrently, the aforesaid grinding wheel 13 abuts against the end faces 2a and 3a of mold rolls 2 and 3 so as to grind them, the pivot member 12 is arranged in such a way as to be normal to a roll pivot member while being directed in the horizontal direction, a rotation driving device 14 for rotating the grinding wheel 13, is mounted to the supporting body 11, a depth of cut adjusting device 16 is provided in order to energize the supporting body 11 around a rocking shaft 15 in such a way that the grinding wheel 13 abuts against the end faces 2a and 3a of the mold rolls 2 and 3 with the depth of cut maintained as specified, and a guiding device 17 is provided in order to move and guide the supporting body 11 along the end faces of the mold rolls 2a and 3a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a polishing apparatus for polishing an end face of a mold roll in a continuous casting machine.

[0002]

2. Description of the Related Art Generally, in a twin mold roll type continuous casting machine, a short side weir is pressed between end faces of a twin mold roll to form a pool of molten steel between the twin mold rolls. And the twin mold rolls are rotated to produce a slab.

The short side weirs need to have high adhesion between the end faces of the twin mold rolls so that the molten steel does not leak from the molten steel pool. When this occurs, a gap is created between the twin mold roll and the short side weir, foreign matter enters between the end face of the twin mold roll and the short side weir, and the end face and the short side weir of the twin mold roll are damaged. Sometimes.

[0004] Even if a new short side weir is pressed against the end surface of the twin mold roll for the next casting operation, if the end surface is still damaged, molten steel is inserted into the damaged portion, and the casting operation is stopped. From the initial stage, there is a problem that the slab is manufactured with so-called burrs attached to the end of the slab or the slab is broken by the restraining shell.

Therefore, prior to the next casting operation, each mold roll was detached from the casting machine and repaired one by one by a lathe to repair the end faces of the twin mold rolls.

[0006]

Since the end face of each mold roll and the short side weir require close contact as described above, the width of each mold roll must also be processed to the same size. However, when each mold roll is removed from the casting machine and processed one by one by a lathe as described above, it is very difficult to process the width of the mold roll to the same size.

[0007] In addition, the inspection of the finish is currently performed by a worker using a skewer or a knife edge stretch or the like, so that the entire operation requires time and skill.

Accordingly, an object of the present invention is to provide an apparatus for polishing an end face of a mold roll in a continuous casting machine which can solve the above-mentioned problems.

[0009]

Means for solving the problem of the present invention is to grind the end face of each mold roll in a state where the peripheral faces of the mold rolls are arranged in parallel and installed in a continuous casting machine. For this purpose, a grindstone rotatably provided on a support via a shaft member, a rotation driving device for rotating the grindstone, and a grindstone so that the grindstone abuts on the end face of the mold roll with a predetermined cutting amount. A cutting amount adjusting device for urging the support around the pivot axis, a guide for guiding the support so that the grindstone abuts and moves between the end faces of the peripheral surfaces of the mold rolls, and a guide along the support. And a guide device for moving it.

[0010] In the above structure, the cutting amount adjusting device is driven in a state where the peripheral surfaces of the mold rolls are arranged in parallel with each other and installed in the continuous casting machine, and the cutting amount is urged around the swing axis to thereby reduce the cutting amount. Is set to a predetermined value, the grindstone is brought into contact with the end face of the mold roll by a predetermined cut amount, the rotation driving device is driven to rotate the grindstone around the spindle member, and the guide device is driven to grind the grindstone. The support is moved along a guide so that the end faces of the mold rolls come into contact with each other between the end faces of the mold rolls, and the end faces of the twin mold rolls are polished with a grindstone in only one stroke.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus A for polishing an end face of a mold roll in a continuous casting machine according to an embodiment of the present invention will be described below with reference to FIGS.

An apparatus A for polishing the end faces of the mold rolls 2 and 3 in the continuous casting machine 1 according to the embodiment of the present invention is shown in FIG.
As shown in FIG. 1, the end surfaces 2a and 3a of the mold rolls 2 and 3 are polished in a state where the peripheral surfaces of the mold rolls 2 and 3 are arranged in parallel and installed in the continuous casting machine 1.

In the continuous casting machine 1, the roll support members 6 of the mold rolls 2 and 3 are rotatably supported by a frame 4 via bearings 5, and the mold rolls 2 and 3 are supported by the roll support members 6. A known rotary driving device 7 is provided for rotation through the inner surface of the frame 4, and a support bracket 8 provided at the front and rear positions on the inner surface of the frame 4 to form a molten steel pool between the peripheral surfaces of the mold rolls 2 and 3. The rectangular plate-shaped short side weir 10 is detachably attached.

As shown in FIGS. 1 to 3, the end surface polishing apparatus A is rotatably mounted on a prism-shaped support 11 via a support shaft member 12 and has end surfaces 2a, 2a of mold rolls 2, 3. 3a is a disk-shaped grinding wheel 13 (made of mold rolls 2, 3)
Are provided in accordance with the material of the end faces 2a and 3a of the roll support member 12).
A rotation driving device 14 for rotating the grinding rolls 13 is mounted, and the grindstone 13 is rotated by a predetermined depth into the mold rolls 2 and 3.
Is provided with a cut amount adjusting device 16 for urging the support body 11 around the pivot shaft 15 so as to abut against the end surfaces 2a, 3a of the mold rolls 2, 3a.
A guide device 17 for guiding movement along 3a is provided.

As shown in the sectional view of FIG. 5, the rotation driving device 14
8 Stopped motor 20 and output shaft 2 of this motor 20
1 and a bevel gear mechanism 23 provided below the support 11 and connected to the transmission shaft 22. The support shaft member 12 is attached to the bevel gear mechanism 23. Have been.

The support 11 is provided with mold rolls 2 and 3
Attached to a mounting member 25 formed below the guide 24 which moves along the end surfaces 2a and 3a of the guide member 24 via the swing shaft 15 so as to be swingable, and as shown in FIG. 16 is a turnbuckle 26 for adjusting the cut amount that connects the upper part of the support 11 and the upper part of the guide 24;
A drive motor 28 attached to the guide 24 for adjusting the cutting depth for extending and retracting the turnbuckle 26, and is interposed between the lower part of the support 11 and the lower part of the guide 24 to swing the support 11 A spring 30 is provided around the shaft 15 for urging in a counterclockwise direction in FIG.

As shown in FIGS. 1 and 2, the guide device 17 has a U-shaped guide in a plan view in which a tip support portion 32 connected by an installation frame 39 is inserted into a concave portion 31 formed in the frame 4. Table 27, and the guide body 24 movably supported by the guide table 27 via a guide 33 described later.
And between the tip support portions 32 of the guide table 27
The guide 33 guides the guide body 24 so that the guide body 24 moves between the end faces 2a, 3a of the peripheral surfaces of the mold rolls 2, 3, and a driving unit 34 for moving the guide body 24 along the guide 33. It is composed of

The driving section 34 is mounted on the guide body 24 by fitting over the ball screw 35 arranged parallel to the guide 33 and the ball screw 35 and the guide 33, and is internally connected to the ball screw 35. Nut member 2 to be screwed
Screw box 19 having a screw 9, and a moving motor 36 attached to the tip support 32 for rotating the ball screw 35.
It is composed of

A reference member 37 for flattening is used for securing the parallel accuracy between the guide 33 and the end faces 2a and 3a of the mold rolls 2 and 3.

In the above configuration, the short side weir 10 is set on the support bracket 8 and the short side weir 10 is pressed between the end faces 2a and 3a of the mold rolls 2 and 3 so that the molten steel is interposed between the mold rolls 2 and 3. A pool is formed, molten steel is poured into the molten steel pool, and the rotation driving device 7 is driven to rotate the mold rolls 2 and 3 to produce a slab.

If the molding rolls 2 and 3 are thermally deformed by the casting operation, it is necessary to repair them. In this case, first, the short side weir 10 is connected to the support bracket 8.
The end surface polishing device A is fixed to the continuous casting machine 1 by inserting the front end support portion 32 of the guide table 27 from above into the concave portion 31 formed in the frame body 4 and installing the installation frame 39 on the support bracket 8. I do.

In this case, without removing the mold rolls 2 and 3 from the continuous casting machine 1 as in the prior art, the short side dam 1
The end surface polishing apparatus A can be easily fixed to the continuous casting machine 1 simply by removing the support surface 8 from the support bracket 8. Further, since the end surface polishing device A is installed on the support bracket 8 of the short side weir 10, the end surface polishing device A can be installed without providing a special device on the continuous casting machine 1 side.

Next, the drive motor 28 is driven to expand and contract the turnbuckle 26 to adjust the cutting depth.
Reference member 37 and end faces 2a, 3a of mold rolls 2, 3
Is measured with a gauge to secure parallel accuracy between the guide 33 and the end faces 2a, 3a of the mold rolls 2, 3.

Then, similarly to the casting operation, the rotation driving device 7 is driven to rotate the mold rolls 2 and 3, and the motor 20 is driven. Then, the drive of the motor 20 is transmitted to the support shaft member 12 via the transmission shaft 22 and the bevel gear mechanism 23, and the grindstone 13 starts rotating while being in contact with the end faces 2a, 3a of the mold rolls 2, 3.

On the other hand, when the ball screw 35 is rotated at a predetermined speed by driving the moving motor 36, the screw box 19 is guided by the guide 33, and the support 11 together with the guide 24 is The grindstone 13 moves along the end faces 2a, 3a of the mold rolls 2, 3 while polishing the end faces 2a, 3a of the mold rolls 2, 3.

In this way, the grinding wheel 13 moves while abutting between the end surfaces 2a and 3a of the peripheral surfaces of the mold rolls 2 and 3 (by polishing in one stroke). 2a and 3a can be machined on the same surface with a predetermined cut amount.

Further, the moving motor 36 is driven in the reverse direction to rotate the ball screw 35 in the reverse direction, and the grindstone 13 is reciprocated along the end surfaces 2a and 3a of the mold rolls 2 and 3, whereby the mold roll 2 is rotated. , 3 can be reliably polished.

If the locus of the movement of the grindstone 13 coincides with the straight line connecting the centers of the mold rolls 2 and 3 (the nip point of the mold rolls 2 and 3), the grindstone 1
3 can be set to the shortest distance.

Further, if the rotation of the grindstone 13 is high during the polishing operation, the entire apparatus is likely to rattle. However, according to the above-described embodiment, the cut amount adjusting device 16 causes the support 11 to move the support shaft 15 Adopt a lever link mechanism that can rotate around,
Since the spring 30 for suppressing rattling is provided between the lower part of the support 11 and the lower part of the guide 24, vibration accompanying the high-speed rotation of the grindstone 13 can be suppressed. Further, the amount of cutting of the grindstone 13 can be easily adjusted by the lever link mechanism.

When the polishing of the end surfaces 2a, 3a of the mold rolls 2, 3 is completed, the tip support 32 of the guide table 27 is removed from the recess 31 of the frame 4 and the support frame 8 is attached to the installation frame. 39, the end face polishing apparatus A is removed from the continuous casting machine 1, and the end face polishing apparatus A is set on the continuous casting machine 1 on the other end faces 2a, 3a of the mold rolls 2, 3 in the same manner as described above. Similarly to the above, the other end surfaces 2a of the mold rolls 2, 3
Polish 3a.

As described above, according to the embodiment of the present invention, the short side weir 10 is removed from the support bracket 8 without removing the mold rolls 2 and 3 from the continuous casting machine 1 and the support bracket of the short side weir 10 is removed. 8, the end-face polishing device A can be installed without providing any special device on the continuous casting machine 1 side. End face 2 of mold rolls 2 and 3 along guide 33
Since the a and 3a are polished, the width of the mold rolls 2 and 3 can be made the same size and polished. When the short side weir 10 is pressed against the end faces 2a and 3a of the mold rolls 2 and 3,
The short side weir 10 can be brought into close contact with both end faces 2a and 3a.

Further, since the short side weir 10 is removed from the support bracket 8 without removing the mold rolls 2 and 3 from the continuous casting machine 1, and the end face polishing apparatus A is fixed to the continuous casting machine 1, the polishing operation is performed. The polishing operation does not require skill, and the entire polishing operation is facilitated.

In the above-described embodiment, it is a matter of course that a remote control device may be incorporated in the cut amount adjusting device 16 and the guide device 17 so that the polishing operation can be quickly performed by the remote control device.

[0034]

As is apparent from the above invention, the present invention provides a rotary drive device for rotating a grindstone rotatably provided on a support via a shaft member, and a grindstone having a predetermined cutting amount. A cutting amount adjusting device that urges the support around the pivot axis so that the peripheral surfaces abut against the end surfaces of the mold rolls installed in parallel, and the grindstone abuts and moves between the end surfaces of the peripheral surfaces of the mold rolls. A guide for guiding the support and a guide device for moving the support along the guide are provided, so that the width of the mold roll can be set to the same dimension and the polishing can be easily performed. When the short-side weir is pressed against the end face of the mold roll, the short-side weir can be brought into close contact with both end faces.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a mold roll end surface polishing apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a schematic plan view showing a state in which an end polishing apparatus for a mold roll is attached to a continuous casting machine.

FIG. 5 is a sectional view showing the entire configuration of the rotary drive device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Continuous casting machine 2 Mold roll 2a End face of mold roll 3 Mold roll 3a End face of mold roll 4 Frame 7 Rotation drive unit 8 Support bracket 10 Short side weir 11 Support body 13 Grindstone 14 Rotation drive unit 15 Oscillating shaft 16 Cutting amount Adjustment device 17 Guide device 24 Guide body 28 Drive motor 30 Spring 27 Guide stand 33 Guide 34 Drive unit 35 Ball screw 36 Moving motor

Claims (1)

[Claims] 1. An apparatus for polishing an end face of a mold roll in a continuous casting machine for polishing an end face of each mold roll in a state where peripheral surfaces of the mold rolls are arranged in parallel and installed in a continuous casting machine, A grindstone rotatably provided on a support via a shaft member, a rotation driving device for rotating the grindstone, and a support such that the grindstone abuts the end face of the mold roll with a predetermined cutting amount. A cutting amount adjusting device for biasing around the swing axis, a guide for guiding the support so that the grindstone abuts and moves between the end faces of the peripheral surfaces of the mold rolls, and the support is moved along the guide. And a guide device for the end face of the mold roll in the continuous casting machine.