JPS6227318Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a roll segment that constitutes a slab conveyance path in continuous casting equipment.

In each roll segment, the roll spacing is changed appropriately using a roll spacing adjustment device in response to changes in the thickness of the slab. In addition, the change in the amount of bulging due to changes in the shell thickness of the slab, the change in the bulging force due to the presence or absence of an unsolidified layer, the reaction force due to deformation due to spray cooling, and the change in the amount of bulging due to changes in the shell thickness of the slab, the reaction force due to deformation due to spray cooling, and the change from the arc section to the straight section of the slab conveyance path. Since the slab thickness dimension along the casting direction changes randomly due to changes in reaction force due to straightening, etc., the roll spacing that has been properly set in advance is likely to be deviated. If such deviation occurs, it will have an adverse effect on the formation of shells, solidification, etc., and will deteriorate the quality of the slab. In extreme cases, it may also cause a breakout.

Therefore, the present invention provides a roll segment for continuous casting equipment that solves these problems, and its features include a nut fixed to the four corners of the lower frame, and a male thread screwed into the nut. a spacer rod is provided between the male threaded portion and the upper frame, and an operating rod is provided that is inserted into the male threaded portion so as to be vertically movable and rotates the male threaded portion via a key; a spacer rod is provided between the male threaded portion and the upper frame; By rotating forward and reverse through
A drive device for raising and lowering the spacer rod is provided, and a support is provided whose lower part is connected to the four corners of the lower frame and whose upper part extends upward through a through hole in the upper frame.The main body is connected to the upper end of the support and the piston rod is A clamp cylinder connected to the upper frame is provided, and with this configuration, it is possible to easily adjust the roll spacing, and the adjusted roll spacing is caused by the bulging force of the slab. It's something that doesn't go crazy.

Hereinafter, one embodiment of the present invention will be described based on the drawings. 1 is a lower frame, and leg parts 2 protruding from the lower surface are fixed to a base (not shown). 3
is a lower roll rotatably supported by the lower frame 1 via a bearing, 4 is an upper frame, and 5 is an upper roll rotatably supported by the upper frame 4 via a bearing. Roll 5 and each lower roll 3
Among these, a suitable roll is a drive roll, and the upper drive roll is moved up and down by a drive roll cylinder device (not shown) provided on the upper frame 4. Reference numeral 6 denotes a fixed cylinder inserted and fixed into holes formed at the four corners of the lower frame 1, 7 is a nut fixed to the upper part of the fixed cylinder 6, and 8 is a pipe-shaped male threaded part screwed into the nut 7. , 9 is a gearbox fixed to the lower surface of the fixed cylinder 6;
10 and 11 are a worm wheel and a worm gear rotatably supported by the gear box 9;
2 is an operating rod whose lower end is fixed to the worm wheel 10 and whose upper end is inserted into the male threaded portion 8; 13 is a key which is fixed to the upper end of the rod 12 and fitted into a keyway in the male threaded portion 8; ,1
Reference numeral 4 denotes a strut, which is loosely fitted into the male threaded portion 8 at the four corners of the lower frame 1 and is attached to the lower flange 1.
5A is a cylindrical part 15 fixed to the lower frame 1;
It consists of four support rods 16 whose lower ends are fastened with nuts to the four corners of the upper flange 15B of the cylindrical portion 15, and whose upper ends extend upward through the through holes of the upper frame 4. Blocks 17 are inserted and fixed into holes formed at the four corners of the upper frame 4.
8 has a lower end inserted into the cylindrical portion 15 to form a male threaded portion 8
a spacer rod 2 placed on top and having its upper end inserted into the lower hole 19 of the lower surface of the block 17;
0 is a bush, 21 is a thrust bearing, 22 is a support plate whose four corner holes fit into the small diameter portions of the upper ends of each of the support rods 16, and 23 is a main body placed on the support plate 22 and attached to each support rod 16. A clamp cylinder whose head 24 is screwed onto the tip of the piston rod and is fitted into a recess 25 on the upper surface of the block 17; 26 is a stopper bolted to the upper surface of the block 17 to prevent the head from coming off; 2
7 is a reducer 28 that rotates the worm gear 11 in forward and reverse directions.
29 is a rotation angle detector of the motor 27, and 30 is a slab supported by both the upper and lower rolls 3 and 5.

The operation of the above configuration will be explained. In order to reduce the roll interval α from the state shown in the figure, the piston rod of the clamp cylinder 23 is reduced. Then, the upper frame 4 is raised via the head 24 and the stopper 26, and the edge between the spacer rod 18 and the block 17 is severed. Next, the drive motor 27 and reducer 28 are controlled to rotate the worm gear 11 in one direction by a predetermined angle. This allows the worm wheel 10, the operating rod 12 and the key 13 to
The male threaded portion 8 is rotated through the male threaded portion 8.
is lowered by a predetermined amount. As a result, the spacer rod 18 is also lowered by a predetermined amount. Next, the piston rod of the clamp cylinder 23 may be extended to lower the upper frame 4. As a result, the block 17 is brought into pressure contact with the upper surface of the spacer rod 18, and the roll interval α is set to a predetermined value. When continuous casting is started in such a state, the slab 30 passes between the upper and lower rolls 3 and 5, and the rolls 3 and 5 receive a bulging force, but the upper frame 4 is strongly pressed downward by the clamp cylinder 23. Therefore, there is no play in the threaded portion or elongation of the column as in the conventional case, and the roll spacing is properly maintained at a predetermined level. In addition, when an abnormal reaction force (abnormal bulging force, straightening reaction force) is generated by the slab 30, the clamping force of the clamp cylinder 23 is defeated by the bulging force, and the upper roll 5 rises. or frames 1 and 4 will not be damaged. Further, a drive roll is supported on the upper frame 4, and the drive roll is rotationally driven to convey the slab 30 in the feeding direction. The slab 30 is attached to the upper frame 4 by the rotation of this drive roll.
However, since the upper frame 4 is supported by the lower frame 1 via the spacer rod 18, a lateral force is applied to the piston rod of the clamp cylinder 23, which prevents damage to the clamp cylinder 23. Nor. When increasing the roll interval α, the same procedure as above may be used, except that the worm gear 11 is rotated in the other direction.

As mentioned above, according to the roll segment in the continuous casting equipment of the present invention, it is possible not only to freely adjust the roll interval, but also to
Since the upper frame is strongly pressed downward by the clamp cylinder, during continuous casting, there is no play in the threaded part or elongation of the column unlike in conventional casting, and the roll spacing is maintained at the specified level. Ru. Furthermore, if an abnormal reaction force is generated by the slab, the clamping force of the clamp cylinder is overcome by the bulging force and the upper roll rises, so that both the upper and lower rolls and the frame are not damaged.
In addition, the upper frame is raised by the clamp cylinder, and the upper frame is separated from the spacer rod, and then the drive device rotates the male screw portion in the forward and reverse directions to adjust the roll spacing, so the driving force of the drive device is small. You can often speed it up. Furthermore, when the drive roll is supported by the upper frame, the spacer rod can support the reaction force applied to the upper frame in the opposite direction to the billet feeding direction, which prevents lateral force from being applied to the piston rod of the clamp cylinder. In addition to preventing the damage caused by this, the support structure for supporting the clamp cylinder can also be easily constructed.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Figure 1 is a partially cutaway side view, Figure 2 is a partially cutaway front view of the main part,
FIG. 3 is a view taken along the - arrow in FIG. 1...Lower frame, 3...Lower roll, 4...Upper frame, 5...Upper roll, 7...Natsuto, 8...
... Male threaded part, 12 ... Operation rod, 13 ... Key, 14 ... Support column, 18 ... Spacer rod, 2
3... Clamp cylinder, 27... Drive motor (drive device), 30... Slab.

Claims (1)

[Scope of utility model registration request] Provide fixed nuts at the four corners of the lower frame,
A male threaded portion is provided to be screwed into the nut, an operating rod is inserted into the male threaded portion so as to be movable up and down and rotates the male threaded portion via a key, and a spacer rod is provided between the male threaded portion and the upper frame,
A driving device is provided which raises and lowers the spacer rod by rotating the male threaded portion forward and backward through an operating rod, and a support is provided whose lower part is connected to the four corners of the lower frame and whose upper part extends upward through the through hole of the upper frame. A roll segment in continuous casting equipment, characterized in that it is provided with a clamp cylinder whose body is connected to the upper end of the column and whose piston rod is connected to the upper frame.