JPH0511002Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mold clamping device for continuous casting.

[Prior art] As a conventional mold clamp device, the
As shown in Publication No. 14732 (Fig. 5), the short side 1 is held between the worm 18, the worm wheel 19, and the screw shaft 17 rotated by the worm wheel, with the long and short side support frame 20 as a fulcrum, or the short side 1 is actually Publication No. 58-23479 (Figure 6)
As shown in , it is composed of a threaded rod 4 that passes through water cooling boxes 3a and 3b that support a pair of long side plates, a spring 7 attached to one end (or both ends) of the threaded rod, and nuts 5 and 6. There is a mold clamping device.

[Problems to be solved by the invention] The prior art has the following problems. In other words, in the case of Utility Model Publication No. 52-14732 (see Figure 5), (a) Extra long and short side support frames 20 are required.

(b) For short-side clamping, the support frame needs to have great rigidity to withstand the reaction force of the clamping force.

C. In order to secure the optimum clamping point, the height of the support frame at the portion corresponding to the clamping point is required, and as a result, the height is required to be approximately the same as the height of the water cooling box.

D. Due to the reasons mentioned in the previous section (b) and (c), the support frame becomes larger, the external dimensions of the mold as a whole become larger, and the weight also becomes larger.

E The above is because when casting multiple strands, for example, two strands, using a pair of water-cooled boxes with a built-in electromagnetic stirring device as shown in Figure 1, the height of the support frame cannot be secured due to installation space constraints, making it impossible to install a clamping device. It cannot be established as a mold.

Furthermore, in the case of Utility Model Publication No. 58-23479 (see Figure 6), (a) For example, in the case of two-strand casting, in the case of a clamping device that uses a threaded rod 4 that passes through a water-cooled box between the strands, a water-cooled box, etc. There is a built-in electromagnetic stirring device, and it is not possible to install a threaded rod through the water cooling box. For this reason, it is only possible to clamp the upper and lower ends of the water-cooled box without penetrating the electromagnetic stirring device, and it is not possible to clamp the central portion of the water-cooled box.

(b) Therefore, compared to the short side plates at both ends, molten steel spatter is more likely to get caught in the contact area between the central short side plate and the long side plate, resulting in a shorter mold replacement life.

[Means for Solving the Problems] The present invention has been devised to solve the above-mentioned problems, and is a continuous casting mold having a plurality of strands in which a plurality of pairs of short-side molds are provided on a pair of long-side molds. In the continuous casting mold clamp device for clamping a short-side mold to the long-side mold, a plurality of pairs of locking members are provided facing each other in the height direction inside the long-side mold between the short-side molds, This mold clamping device for continuous casting is characterized in that the locking member is provided with a clamping device having hooking heads at both ends.

The clamping device is a spring clamp, and the spring clamp includes a cylinder housing a spring and having a hooking head, a threaded rod having the hooking head inserted into the cylinder, and a threaded rod attached to the threaded rod. This mold clamping device for continuous casting is characterized by comprising an adjusting nut for adjusting the clamping force of a spring, and a presetting nut.

[Function] When the clamp device of the present invention draws and clamps the short-side mold attached between each strand to the long-side mold, it can clamp the central part of the mold in the height direction, which could not be done conventionally. It is possible to prevent gaps from forming between the short and long sides of the section.

In addition, the clamping force of the spring clamp, which is the main body of this clamping device, can be precisely set outside the machine.
Can provide appropriate clamping force.

Furthermore, within the narrow space formed by the long and short sides,
Compact for easy storage, and
The spring clamp can be easily attached to the locking member by simply loosening the preset nut.

[Embodiment] An embodiment of the present invention will be described below based on FIGS. 1 to 4.

A pair of long sides 2a, 2b, 2a' forming the mold,
Locking members 8a and 8b are fixed to opposing positions of water cooling boxes 3a and 3b that support 2b'.

Next, it has a hooking head 21 at one end, a screw is cut at the root and the other end of the head, and a presetting nut 14 is screwed into the root screw.
A cylindrical body A10 that is movably fitted between the threaded rod 9 and the root screw and the other end screw of the screw rod 9 is provided, and an adjustment nut 1 is attached to the screw portion of the other end of the screw rod 9.
1 are screwed together, and a spring 12 is disposed between the nut 11 and the bottom wall of the cylindrical body A10. A cylindrical body B having a hooking head 21 at one end of the opening of the cylindrical body A10.
13 are joined to the cylindrical body A10 by the flange portion provided on the cylindrical body B13 to form an integrated spring clamp 15.

Next, a method of clamping the mold in the above configuration will be explained.

(a) As shown in FIG. 4, the presetting nut 14 is brought into contact with the side surface of the cylindrical body A10 so that the L dimension becomes (A-B), that is, the free length of the spring 12 is ensured.

(b) Set dimension C in Figure 4 to the following value by turning the adjustment nut 11.

This sets the spring force to the required clamping force.

C = (free length of spring) - δ where A: Locking members 8a, 8 fixed to the pair of water cooling boxes when the short side plate is sandwiched between the pair of long side plates
Distance between b B: Distance from the base of the hooking head 21 of the cylinder B13 to the right end surface of the cylinder A10 δ: Spring deflection when setting the required clamping force.

C Next, the spring 1 integrated with the locking members 8a and 8b
5 in the following manner. That is, the L dimension in the figure is set to the following value by tightening the preset nut.

L=A-B+α where α: Gap for installation (approximately 1 to 2 mm) Perform the above preset installation work outside the machine in advance.

D. After installing the spring clamp 15 into the last locking member 8a, 8b, tighten the preset nut 14.
Loosen it to the position where it releases contact with the cylinder A10.

As a result of the above, the head portions at both ends of the spring clamp 15 come into contact with the locking members 8a and 8b, and the spring deflection is reduced by δ.
As a result, a necessary clamping force is generated between the threaded rod 9 and the cylindrical body B13, and the short side plate can be firmly clamped between the pair of long side plates.

The above-mentioned required clamping force is a force that prevents a gap from forming at the contact surface between the long side plate and the short side plate during molten steel casting.

[Effects of the invention] According to the invention, in the case of casting multiple strands, for example, two strands, a pair of long-side molds is shared by the two strands, and the clamping force can be reduced even in casting where an electromagnetic stirring device is built in the water-cooled box of the long-side molds. Appropriate allocation and averaging can be easily achieved. As a result, it is possible to prevent gaps from forming at the contact surface between the long side plate and the short side plate, preventing foreign matter from entering the contact surface, and reducing the mold replacement life caused by the formation and expansion of so-called corner gaps. extension is achieved.

According to the knowledge of the inventors of the present invention, the replacement life of a mold with a clamping device configured to allow threaded rods to pass through the water-cooled box at two locations at the upper and lower ends of the water-cooled box to avoid interference with the electromagnetic stirring device is approximately 100 charges. In contrast, the life of the mold that was additionally installed with the clamping device of the present invention in the center of the water-cooled box was approximately 450 charges, significantly extending the lifespan.

In addition, the only space required to install the device is the space inside the pair of long-side molded water-cooled boxes, which is much smaller than conventional clamp devices that require installation space outside the water-cooled box. Since the installation space is small, the electromagnetic stirring device has a great effect when applied to a general mold.

The present invention is not only applicable to molds in which it is impossible to penetrate the hole for the threaded rod of the clamp device into the water-cooled box for long-side molds, but also applies to the water-cooled box for long-side molds compared to conventional methods. Since it is only necessary to fix the stopper member, the production of the water-cooled box is easy and production costs can be reduced, and since the installation space is extremely small, it can be effectively applied to general molds.

Furthermore, the clamping force can be set independently and easily outside the machine. Furthermore, the present invention has great effects, such as attachment to the mold by simply dropping the preset spring clamp 15 into the locking member and loosening the preset nut.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a clamping device showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of Fig. 1, and Fig.
The figure is a cross-sectional view of FIG. 2, and FIG. 4 is an explanatory diagram of the method of presetting the spring of the present invention and assembling it into the mold.
FIGS. 5 and 6 are diagrams showing examples of the prior art. 1... Mold short side plate, 2a, 2b... Long side plate, 3
a, 3b... Long side mold water cooling box, 8a, 8b... Locking member, 9... Threaded rod, 10... Cylindrical body A, 11...
... Adjustment nut, 12 ... Spring, 13 ... Cylindrical body B, 14 ... Preset nut, 15 ... Spring clamp, 16 ... Electromagnetic stirring device, 20 ... Support frame, 21 ... Hook head .

Claims (1)

[Claims for Utility Model Registration] 1. A continuous casting mold having a plurality of strands, in which a plurality of pairs of short-side molds are provided in a pair of long-side molds, and the short-side mold is clamped to the long-side mold. In the mold clamp device, a plurality of pairs of locking members are provided facing each other in the height direction on the inside of the long side mold between the short side molds, and the locking member is provided with a clamp device having a hooking head at both ends. A mold clamping device for continuous casting, which is characterized by: 2. The clamping device is a spring clamp, and the spring clamp includes a cylinder housing a spring and having a hooking head, a threaded rod having a hooking head inserted into the cylinder, and screwed onto the threaded rod. , an adjustment nut for adjusting the clamping force of the spring, and a preset nut.
The mold clamping device for continuous casting described above.