JPS6229173Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an annular belt type continuous casting device.

1 to 4 show an example of a conventional annular belt type continuous casting apparatus.
01 is a molten metal (hereinafter referred to as molten metal), and 02 is a tundish for temporarily storing the molten metal 01 and supplying it little by little.The outer shell is cast and the inside is made of refractory and heat insulating material. 03 is molten metal 01
04 is a lower annular belt, 05 is a pair of lower wheels for driving the belt 04, 06 is a plurality of lower holding rolls for keeping the belt 04 in a fixed position, 07
are a plurality of lower coolers for cooling and solidifying the molten metal 01 by cooling the belt 04, and the cooling water flowing inside the lower annular belt 04
The structure is such that the water spews out from a number of openings that open in the direction of the water. Above member 04~
A structure that has almost the same effect as 07 is also provided on the top. In other words, in Figures 1 and 2, 0
8 is an upper annular belt, 09 is a pair of upper wheels, 010 is a plurality of upper press rolls, and 011 is a plurality of upper coolers. 012 is the left side block, 017 is the right side block,
These are each attached to reinforcing blocks 013 and 018 with bolts. In addition, the left and right reinforcing blocks 013 and 018 are separately installed on appropriate mounts (not shown).
Upper annular belt 08, lower annular belt 0 through
It is fixed independently from 4.

Its detailed drawings are shown in FIGS. 3 and 4. In these figures, 012 is a side block, 013 is a reinforcing block, and the side block 012 is fastened to the reinforcing block 013 with a bolt 014.

Usually, the side block 012 is made of copper or the like having good heat conductivity for cooling the molten metal.

Also, part a is a cooling water passage, and 015 is an O-ring for preventing leakage of cooling water.

In the conventional apparatus configured as described above, castings are continuously cast by the following operations.

By tilting the tundish tray 02, the molten metal becomes zero.
1 is fed onto the lower annular belt 04 little by little.
The molten metal 01 comes into contact with the inner surfaces of each of the casting molds consisting of the lower annular belt 04, the upper annular belt 08, the left side block 012, and the right side block 017, and solidifies into a thin plate-shaped casting 03. At this time, since the upper and lower annular belts 04 and 08 are driven by their respective wheels (05, 09, etc.), the casting 03 slides on the inner surfaces of the left and right side blocks 012, 017 while Move in the direction of arrow C in the figure. Further, in this case, the movement of the annular belts 04 and 08 is kept constant, and the amount of molten metal from the tundish 02 is adjusted so that the molten metal 01 supplied inside the belts does not overflow. Furthermore, during casting, water is poured from the lower and upper coolers 07 and 011 to cool the lower and upper annular belts 04 and 08,
The left and right side blocks 012, 017 are cooled by passing cooling water through cooling water channels (section a in FIG. 3) provided inside the blocks.

Note that by continuously supplying the molten metal 01 into the tundish 02 from a large-capacity ladle (not shown), continuous thin plate castings 03 can be cast.

In the above conventional device, the side blocks 012, 0
17, due to heat input from the molten metal, a temperature difference is created between the molten metal side and the cooling water side, causing a convex curved deformation on the molten metal side, and at the same time, elongation deformation in the longitudinal direction occurs as the temperature rises.

In order to prevent these deformations, the side block 0
12,017 is fixed to the reinforcing blocks 013,018 with several bolts 014 as shown in FIGS. 3 and 4, but there are the following problems.

(i) The shared load of the bolts required to restrain deformation is not uniform for each bolt, and is larger for the bolts near both ends in the longitudinal direction.

In other words, the one or two bolts at both ends share excessive tensile and shearing loads, making them weak points in terms of strength.

(ii) Since the temperature of the side block is relatively higher than that of the reinforcing block, a difference in elongation deformation occurs between the two in the longitudinal direction. Since both are connected by bolts, a kind of bimetallic effect causes a convex curved deformation on the molten metal side.

In other words, there are two types of side blocks: one is bending deformation due to the temperature difference between itself and the other is bending deformation due to the bimetal effect with the reinforcing block. When these deformations occur, the smooth movement of the casting is inhibited, cracks occur in the casting, and the quality of the product is deteriorated, which is not desirable.

(iii) In order to completely restrain these curved deformations, the reinforcing block must be highly rigid, which inevitably increases the weight and is not economical.

The present invention solves the problems of the conventional device described above, does not generate excessive stress on the bolt, and has a structure with small bending deformation of the side block.
This was proposed with the aim of providing an annular belt type continuous casting equipment that can prevent cracking of castings and quality deterioration and ensure stable operation. This is characterized by freeing relative sliding in the longitudinal direction between the bolts and eliminating the bending deformation caused by the bimetallic effect and the shearing load acting on the bolt.

Hereinafter, according to the embodiment shown in FIGS. 5 and 6,
The present invention will be explained in detail. 1 in those figures
2 is a side block, and 13 is its reinforcing block. is fixed to the reinforcing block 13. In this case, there should be a slight difference between the height h of the small diameter portion 16a of the holding jig 16 and the height h' of the locking portion 12a of the side block 12 so that h≧h'. A necessary structural condition of the present invention is that the side blocks 12 and the reinforcing blocks 13 are assembled so that they can slide relatively freely along the longitudinal direction.

Note that in the figure, a indicates a cooling water flow, and 15 indicates an O-ring.

One embodiment of the device of the present invention is constructed as described above, and when a heat load is applied from the molten metal side, the side block 12 undergoes a curved deformation due to the temperature difference between the molten metal side and the cooling side, and its own average temperature increases. Due to the rise of
Although stretching deformation may occur in the longitudinal direction, this curved deformation is restrained by the side surfaces of the groove formed by the holding jig 16 and the reinforcing block 13, but is not restrained in the longitudinal direction. It can be freely stretched and deformed.

Since the device of the present invention has the above-described configuration and operation, according to the present invention, (1) the side block 12 and the reinforcing block 13 are
Since the two members can freely slide relative to each other in the longitudinal direction, bending deformation due to the bimetallic effect does not occur.

Therefore, it is possible to prevent cracks in the casting and deterioration in product quality caused by these deformations.

(2) The reinforcing block 13 only needs to restrain the bending deformation caused by the temperature difference of the side block 12 itself, but since these restraints are performed via the holding jig 16, the load shared by the bolts is reduced on average compared to conventional devices. be converted into Furthermore, no shearing load is generated mechanically. Therefore, the bolt strength is greatly improved.

The following practical effects can be mentioned.

[Brief explanation of the drawing]

1 to 4 are schematic explanatory diagrams of a conventional example, in which FIG. 1 is a longitudinal sectional side view, and FIG. 2 is a -
3 is a detailed enlarged sectional view of the side block and reinforcing block portion, FIG. 4 is a sectional view taken along the - line in FIG. 5 is a sectional view corresponding to FIG. 3, and FIG. 6 is a sectional view taken along the line -- in FIG. 5. 12: Side block, 13: Reinforcement block,
14: bolt, 15: O-ring, 16: holding jig, a: cooling water passage.

Claims (1)

[Scope of utility model registration request] In an annular belt type continuous casting machine that continuously casts sheet materials using an annular belt, both the right and left side blocks, which form part of the casting mold, are indirectly attached to the reinforcing block via a holding jig, and the side blocks are An annular belt type continuous casting device characterized by being constructed so that a block and a reinforcing block can freely slide relative to each other in the longitudinal direction.