JPH0318040Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a segment device for guide rolls that guide slabs in continuous casting equipment.

(Prior Art) As a conventionally known segment device for continuous casting equipment, there is one disclosed in, for example, Japanese Utility Model Application Publication No. 157255/1983.

The above conventional technique will be explained based on FIG.
41 is a slab, 42 is a lower roll, 43 is a lower frame, 44 is an upper roll, 45 is an upper frame, 46
is a column guide installed on the lower frame 43, 4
7 is a pillar installed at the upper end of the column guide 46;
Reference numeral 9 is a clamp cylinder provided at the upper end of the support column 7 and capable of raising and lowering the upper frame 45; 48 is a column spacer that is guided by the column guide 46 and raised and lowered by a rotating male threaded portion 50; and 51 is a male threaded portion 50.
A fixing nut 52 screws with the male threaded portion 50,
This is a rotation drive device that rotates via a shaft provided with a sliding key 53.

When adjusting the roll interval, first push up the upper frame to which the upper roll 44 is attached to the upper end using the clamp cylinder 49, and then press the upper end of the column spacer 48 and the contact surface of the upper frame 45 that is in contact with the upper end of the column spacer 48. Leave a gap. Next, the column spacer 48 is moved up and down, and the upper end of the column spacer 48 is positioned so that the thickness of the slab 41 required by the lower surface of the upper roll 44 can be set. After that, the upper frame 4 is clamped by the clamp cylinder 49.
5, press the contact surface of the upper frame 45 against the upper end of the column spacer 48, and then lower the upper roll 4.
4 is set to the desired thickness of the slab 41.
Furthermore, as shown in the figure, since the bushing 54 of the upper frame and the column spacer 48 are fitted with a small gap, in the segment device of this structure, the upper frame 45 cannot be tilted with respect to the lower frame 43, but remains parallel. Go up and down while doing so.

(Problems to be Solved by the Invention) In the conventional segment device, since the column spacer 48 is raised and lowered while rotating the male threaded portion 50, rotational sliding occurs on the contact surface between the male threaded portion 50 and the column spacer 48. The contact surface wears out, and the roll spacing setting becomes significantly incorrect.

Furthermore, as shown in Special Publication No. 59-39225,
As a method to prevent defects inside the slab, the slab is removed near the tip of the crater where the molten steel inside the slab has completely solidified.
A casting method that applies a tapered reduction of 0.5 to 2.0 mm/m, the so-called light reduction casting method, has been proposed.
With the segment device, the upper frame 45 can only be lightly rolled down parallel to the lower frame 43, and it is possible to reduce the upper frame 45 by 0.5 to 2.0 mm/0.0 mm, which is effective for preventing internal defects in the slab.
Light reduction casting of m is not possible.

(Means for solving the problem) The feature of the segment device according to the present invention for solving the problem is that, as shown in FIGS. 1 to 3, the lower frame 2 of the segment device has two A worm jack 28 is attached and detached, which is composed of worms 9a and 9b that can be rotated forward and backward, a worm wheel 27 with a screw hole, and screw spacers 8a and 8b that are screwed onto the worm wheel 27 and can be raised and lowered independently. The screw spacer 8 of the worm jack 28 can be freely provided.
A column spacer 3 is provided, one end of which is in contact with the tips of a and 8b so as to be separable, and the other end is connected to the upper frame 1, and a spherical seat 7 on the upper part of the column spacer and a spherical seat 12 provided in the upper frame are brought into contact. Further, the side surface of the column spacer 3 is supported by a spherical bush 11 provided in the upper frame, and a support 1 is attached to the upper end of the column guide 4 that guides the column spacer 3.
4 is erected, a clamp cylinder 16 is provided at the upper end of the support column 14, the piston rod 18 of the clamp cylinder 16 is connected to the upper frame 1, and the upper frame 1 is tilted relative to the lower frame 2. This makes it possible to change the roll spacing linearly between the entry side and the exit side.

(Function) According to the configuration of the present invention, the upper frame can be tilted freely, and the tapered roll spacing setting for light reduction casting at the final stage of solidification of the slab can be easily adjusted. The increased degree of freedom increases the operating rate and greatly prevents internal defects in the slab.Furthermore, since there is no backlash in the threaded portion or elongation of the column unlike in the conventional method, the accuracy of the set value for the roll spacing can be improved.

Further, according to the present invention, the clamp cylinder 16 opens the clamp when an abnormal overload occurs on the segment due to the rotational buffering operation using the center of the spherical bush 11 as a fulcrum, thereby avoiding the abnormal load. At that time, the necessary buffer stroke of approximately 20 mm can be sufficiently accommodated by providing a small gap between the spherical bushing part 11 and the column spacer 3, and as a result, it is possible to prevent the column spacer 3, clamp cylinder 16, and other peripheral parts of each column spacer from becoming too large. Proper design that prevents this has made it possible to provide compact equipment.

(Example) An example of the present invention will be described below based on the drawings. Fig. 1 is a front view of the segment device according to the invention, Fig. 2 is a side view thereof, and Fig. 3 is a detailed view of section A in Fig. 2. It is.

In the figure, 1 is the upper frame of the segment device;
Reference numeral 2 designates a lower frame of the segment device, and rolls 23 are provided on both frames 1 and 2 via bearings 22, respectively, and form a conveyance path for the slab 24. 3 is a column spacer 3 that passes through the four corners of both frames 1 and 2 and a column guide 4 fastened to the lower frame 3;
Spherical seats 5 and 7 are fastened to both ends of the column spacer 3, and a thrust stop 6 is provided at the upper end of the column spacer 3.
The lower frame 2 includes worms 9a and 9b, a worm wheel 27 with screw holes, and a screw spacer 8 screwed onto the worm wheel 27.
A worm jack 28 consisting of worms 9a and 8b is detachably provided, and the worms 9a and 9b are independently driven by two motors 25, and by rotating the worms 9a and 9b forward and backward, the screw spacers 8a and 8b are installed. be raised and lowered independently. A spherical seat 10 is fastened to the upper end of the screw spacer, and the spherical seat 10 is in contact with the spherical seat 5 at the lower end of the column spacer.

At the four corners of the upper frame 1, as shown in Figure 3,
A spherical seat 12 is fastened to the hole into which the column spacer 3 is inserted, and comes into contact with the spherical seat 7 fastened to the upper end of the column spacer 3, and a spherical bush 11 provided at the entrance of the hole holds the column spacer 3 on the side. I support it from The spherical collar 3a provided on the column spacer 3 comes into contact with a spherical column lifting fitting 13 fastened to the upper frame 1, and the column spacer 3 is held between the spherical seat 12 and the column lifting fitting 13. .

Further, the other end of the column 14 fastened to the upper end of the column guide 4 passes through the upper frame 1 and fastens and supports the cylinder base 15 above the upper frame, and the clamp cylinder 16 is connected to this cylinder base 15 by a rod side flange. It has been concluded. Reference numeral 18 denotes a piston rod of the clamp cylinder 16, and a spherical seat 19 that comes into contact with a spherical seat 21 that is fastened to the upper part of the upper frame through hole is fastened to the tip fitting 17 that is fastened to the piston rod 18. 17 is held between a spherical seat 20 and a spherical seat 21 provided above the spherical seat 12.

Note that at least two spherical bushes 11 that support the column spacer 3 from the side may be provided, and in that case, the side support of the other column spacers will be the bush.

B in FIG. 3 is the center of rotation during buffering of the upper frame, and according to this embodiment, the spherical bush 1
1. Column collar 3a, spherical seat 7, 12, 13, 1
7, 19, 20, and 21 coincide with the spherical centers.

The operation of the above configuration will be explained. In order to reduce the roll distance (d) from the state shown in FIG. 1, the piston rod 18 of the clamp cylinder 16 is reduced. At this time, the spherical seat 19 fastened to the piston rod 18 and the spherical seat 2 screwed onto the upper frame 1
1 and the upper frame 1 is raised, and at this time, the column spacer 3 contacts the column lifting fitting 13 fastened to the upper frame 1 and is raised, and the column spacer 3 and the screw spacers 8a, 8b are The relationship is severed. Next, worm 9a,
9b is rotated by a predetermined angle in one direction, and the screw spacers 8a and 8b are lowered by a predetermined amount without rotating. Next, the piston rod 18 of the clamp cylinder 16 is extended to lower the upper frame 1. As a result, the spherical seat 12 of the upper frame 1 is pressed against the spherical seat 7 at the upper end of the column.
The roll spacing (d) is set as prescribed.

When casting is started in such a state, the bulging force of the slab 24 and the rolling reaction force during light rolling are applied to the upper frame 1 through the rolls 23 and bearings 22, but the upper frame 1 is forcefully pushed downward by the clamp cylinder 16. Since the rolls are pressed against each other, there is no play in the threaded portion or elongation of the column as in the conventional case, and the roll spacing is maintained at a predetermined level. Furthermore, when an abnormal reaction force (abnormal bulging force, bottom side reaction force, top side reaction force) is generated by the slab 24, the clamping force of the clamp cylinder 16 is overcome by the abnormal reaction force, as shown in Fig. 4. A gap is created between the column spacer 3 on the lifted upper frame side and the screw spacer 8 due to the rotational buffering action using the two spherical bushes 11 on one side of the front and rear column spacers as fulcrums. This gap is approximately 20 mm during actual casting, but by providing a small gap between the spherical bushing 11 and the column spacer 3, the above gap can be accommodated, and the spherical bushing 11
absorbs the thrust force, so the rolls 23, bearings 22, and upper frame 1 will not be damaged. Furthermore, the thrust stop 6 prevents the cylinder rod 18 from being bent and the clamp cylinder 16 from being damaged.

When increasing the roll interval (d), the same procedure as above may be followed except that the worms 9a and 9b are rotated in the opposite direction. In addition, when changing the roll spacing linearly between the entry and exit sides and setting a tapered roll spacing, the screw spacers 8a and 8b can be raised and lowered by a predetermined value independently using the motor 25. good.

(Effects of the invention) As described above, according to the segment device of the continuous casting equipment of the present invention, the tapered roll spacing setting can be freely adjusted, and this allows for light reduction at the end of slab solidification and solidification shrinkage. The effect of preventing internal defects in slabs by narrowing down to a suitable level is enormous. In addition, since the upper frame is strongly pressed downward by the clamp cylinder, there is no play in the threaded part or elongation of the column spacer during casting, unlike in conventional methods, and the roll spacing is maintained properly as specified. Therefore, the slab yield is improved. Furthermore, if an abnormal reaction force is generated by the slab, the clamping force of the clamp cylinder will be overcome by the reaction force.
The spherical seat in the upper frame creates a rotational buffering action using the fulcrum, and the spherical bushing absorbs the thrust force generated between the upper frame and the column spacer, so there is no risk of damage to the upper and lower rolls, bearings, and upper and lower frames. There isn't. Furthermore, the upper frame and column spacer are pulled up by the clamp cylinder, and with the column spacer and screw spacer separated, the worm connected to the drive motor is rotated to raise and lower the screw spacer, so the motor load is reduced. Torque is extremely low and equipment costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a front view of the roll spacing adjustment device according to the present invention, Fig. 2 is a side view of the device, Fig. 3 is a detailed view of section A, Fig. 4 is a schematic diagram of roll buffering operation, and Fig. 5 is a conventional It is a figure showing a roll interval adjustment device of. 1...Top frame, 2...Bottom frame, 3...
Column spacer, 4... Column guide, 5...
Spherical seat, 6... Thrust stop, 7... Spherical seat, 8
a, 8b...screw spacer, 9a, 9b
... Worm, 10 ... Spherical seat, 11 ... Spherical bush, 12 ... Spherical seat, 13 ... Column lifting fitting, 14 ... Strut, 15 ... Cylinder base, 16 ... Clamp cylinder, 17 ... Tip Metal fittings, 18... Piston rod, 19, 20, 21
... Spherical seat, 22 ... Bearing, 23 ... Roll, 2
4... Slab, 25... Motor, 26... Rotation detector, 27... Worm wheel, 28... Worm jack, 29... Slip key, 30... Nut, 31... Speed reducer.

Claims (1)

[Scope of utility model registration request] A worm jack consisting of a worm that can be rotated forward and backward independently, a worm wheel with a screw hole, and a screw spacer that is screwed onto the worm wheel and can be raised and lowered independently is attached to and removed from the lower frame of the segment device. A column spacer is provided at will, one end of which is in contact with the tip of the screw spacer of the worm jack in a separable manner, and the other end of which is connected to the upper frame. and the side surface of the column spacer is supported by a spherical bush provided in the upper frame, a support is erected at the upper end of the column guide that guides the column spacer, and a clamp cylinder is attached to the upper end of the support. and connecting the piston rod of the clamp cylinder and the upper frame,
A segment device for continuous casting equipment that can linearly change the roll spacing between the entry and exit sides by tilting the upper frame relative to the lower frame.