JPH04224049A - Cast slab thickness variable mold for continuous casting - Google Patents

Abstract

PURPOSE:To improve operational rate and to obtain cost reduction by making structure of a mold, which can quickly change a short sides in on-line. CONSTITUTION:This mold provides a long side fixed frame 1 and a long side movable frame 2 as movable with a remote control and one pair of fixed short side frames 6 as possible to fit/detach a movable short side frame 5 fixing a short side copper plate 4. After positioning lower end of a bracket by engaging the bracket arranged in the above movable short side frame 5 to a bracket receiver 14 at the fixed short side frame 6 side, this is integrated with a bolt 15 at the upper end thereof and a cooling water supplying/draining pipe for mold and spraying water supplying pipe are connected with a waterway at the movable short side frame 5 side, and the short sides is changed to the optional width.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a continuous casting slab thickness mold.

0002

[Prior Art] In a continuous casting mold, for example, there is a technology related to a so-called variable thickness mold that constructs a mold of a required thickness by replacing only the short side sandwiched between long side frames. 1986-
The one described in Publication No. 72749 is known. One of the long-side frames constituting the mold is the fixed side, and the free-side long-side frame opposite to the fixed-side long-side frame is movably attached to the fixed-side long-side frame. The short side frame made to the thickness of the slab can be held interchangeably, and the frame cooling water supply and drainage pipes made for the short side frame can be replaced at both ends of the free side long side frame. It is connected.

However, with this structure, it is dangerous to remove the short side frame from the moving device in a narrow space on the machine, so it is necessary to remove the entire mold from the machine and then transport it to the work site. It is necessary to insert the mold into the short side frame of the desired thickness, or to prepare a mold of a special thickness in advance, but this requires a lot of time to change the mold size and increases equipment costs. This was extremely disadvantageous in terms of cost.

0004

SUMMARY OF THE INVENTION In view of the problems of the prior art described above, it is an object of the present invention to improve the operating rate and reduce costs by making it possible to quickly replace the short-side frame online.

[0005]

[Means for Solving the Problem] A long-side fixed frame 1 and a long-side movable frame 2, in which a continuous casting slab thickness variable mold can be opened and closed by remote control, and these long-side frames 1,
a fixed short side frame connected to a moving device;
The variable short side frame is attached to and detached from the fixed short side frame, and has a short side copper plate fixed thereto. In addition, a cooling water channel is formed in the variable short-side frame constituting the short-side frame, and the water supply and drainage channel of the fixed short-side frame and the cooling water channel of the variable short-side frame are brought into contact with and separated from each other at the frame mating surface. Furthermore, the mating portion of the fixed short-side frame and the variable short-side frame is provided with an engaging portion and a coupling portion, and the engaging portion facilitates positioning.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a general configuration diagram of a mold, FIG. 2 is a sectional view of a short side frame, and FIG. 3 is a partial plan view.

In the figure, 1 is a long-side fixed frame, and 2 is a long-side movable frame opposite to the long-side fixed frame 1. A long side copper plate 3 and a short side copper plate 4 are sandwiched between the long side fixed and movable frames 1 and 2 to form a mold space. 5 is a variable short side frame to which the short side copper plate 4 is fixed, and 6 is a fixed short side frame provided outside the variable short side frame 5, to which the variable short side frame 5 can be attached and detached. Note that in the following description, the term variable means interchangeable.

Reference numeral 7 denotes a short side moving spindle, which is driven by a short side moving drive device 12. Reference numeral 8 denotes a tie rod provided through the opposing long side fixed frame 1 and long side movable frame 2, and one end is remotely controlled by a worm jack 11 for adjusting the length of the tie rod provided on the outer surface of the long side fixed frame 1. This allows the dimensions of the tie rod 8 to be adjusted. A hydraulic cylinder may be installed instead of this worm jack. The other end of the tie rod 8 is a piston 9a that constitutes a plunger device 9 for releasing the clamping force provided in the long side movable frame 2.
It becomes. The piston 9a fits into a plunger chamber 9b constituting the plunger device 9.
is provided at the outer end of the casing 9c provided within the long-side movable frame 2. Inside the casing 9c, a clamp spring 10 is connected to the bottom 9d of the casing 9c and the tie rod 8.
It is attached between flanges 8a provided on the flange 8a. A bottom portion 9d of the casing 9c engages with a stepped portion 8b provided on the tie rod 8.

Reference numeral 13 (FIG. 4) is a positioning bracket provided on the variable short side frame 5, and a bracket receiver 14 is provided on the fixed short side frame 6 side correspondingly. 1
5 is a fixing bolt for fixing the variable short side frame 5 to the fixed short side frame 6, 16 is an O-ring for watertightness, and 17 is a spray water pipe. 18 is a mold cooling water supply and discharge pipe, 1
9 (FIG. 2) is a water channel within the variable short side frame 5. 20
2 is a slit-shaped waterway between the short side copper plate 4 and the variable short side frame 5, and 21 is a foot shoe. 22 is a spray water hose, and 23 is a nozzle.

FIG. 4 is a diagram showing the state immediately before the variable short side frame 5 is attached to the fixed short side frame 6. First, hang the variable short side frame 5 with a rope, and then use the bracket 13 for positioning.
is fitted into the corresponding positioning bracket receiver 14, and when the bolt 15 is screwed into the bolt hole 15a and tightened, the fixed short side frame 6 and the variable short side frame 5 become integrated. The space between them is sealed by an O-ring 16, and the mold cooling water supply/discharge pipe 18 and the spray water pipe 17 are connected to the water channel 19 in the variable short side frame 5.
The short side copper plate 4 can be cooled by the cooling water flowing through the short side copper plate 4.

[0011]

[Operation] In Fig. 1, when hydraulic pressure is supplied from the oil port 24 to the plunger device 9 for releasing the clamping force, the piston 9a
is pressed to compress the clamp spring 10 via the flange 8a and eliminate the clamping force. Next, when the worm jack 11 is driven by a hydraulic motor or an electric motor, the tie rod 8
is expanded or contracted. The amount of this elongation or shrinkage is electrically determined by a synchronizer or the like directly connected to the drive shaft. The long side movable frame 2, which is connected to the stepped portion 8b of the tie rod 8 via the casing 9c, is opened. In this open state, as shown in FIG. 4, suspend the variable short side frame 5 with the short side copper plate 4 and foot shoe 21 set in advance, and insert it from the side between both long side frames 1 and 2 as shown by the arrow. move it.

When the bracket 13 is fitted into the bracket receiver 14 and tightened with the bolt 15, the fixed short side frame 6
and the variable short side frame 5 are integrated. As a result, the space between them is sealed by the O-ring 16, and the water supply and drainage pipe 18 and the spray water pipe 17 are connected to the water channel on the variable short side frame 5 side.
If cooling water is sent, it will flow through the cooling water channel 19 and the water channel 20 to cool the copper plate 4.

Next, when the worm jack 11 is parked in the closing direction, the long side movable frame 2 moves in the closing direction and stops with the variable short side frame 5 sandwiched therebetween. When the hydraulic pressure is discharged from the oil port 24 of the plunger device 9, the clamp spring 1
A spring force of 0 acts as a clamping force to clamp the short side copper plate 4 with the long side copper plate 3.

Because of this configuration, when the width L of the variable short side frame 5 is large, it will be as shown in FIG. 5, and when the width l is small, it will be as shown in FIG. be able to.

In the above embodiment, the variable short side frame 5
Cooling channels 19 and 20 formed in the fixed short side frame 6
The water supply and drainage pipes 17 and 18 on the side are connected to and separated from each other at the frame mating surface, but the pipe protruding from the variable short side frame 5 and the water supply and drainage pipe on the fixed short side frame are connected using a coupler or the like. It may be connected removably with a tool.

In addition, in the illustrated example, the bracket 13, the engagement portion by the bracket receiver 14, the bolt 15, and the bolt hole 15
Although the variable short side frame 5 is provided with a connecting portion by a, the variable short side frame 5 may be removably connected to the fixed short side frame 6 using only bolts and bolt holes (screw means).

[0017]

[Effect] Long side fixed frame 1 that can be opened and closed by remote control
and a long side movable frame 2, and these long side frames 1 and 2.
A fixed short side frame having a pair of short side frames 6 sandwiched therebetween, the short side frames being connected to a moving device, and a variable short side that is attached to and detached from the fixed short side frames and having a short side copper plate fixed thereto. It consists of a frame.

[0018] With this configuration, the variable short side frame can be quickly replaced online on the short side while leaving the long side unchanged, and the thickness of the slab can be changed, so the operating rate can be improved. In addition to improvements, it is possible to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is an overall view of a variable thickness mold for continuous casting according to the present invention.

FIG. 2 is a diagram showing one short side, and shows a state in which a variable short side frame is fixed to a fixed short side frame.

FIG. 3 is a view taken in the direction of arrow III in FIG. 2;

FIG. 4 is a diagram showing a state in which a variable short side frame is attached to a fixed short side frame.

FIG. 5 is a diagram showing the relationship between the fixed short-side frame and the variable short-side frame when the width L of the variable short-side frame is large.

FIG. 6 is a diagram showing the relationship between a fixed short-side frame and a variable short-side frame when the width l is similarly small.

[Explanation of symbols]

1 Long side fixed frame 2 Long side movable frame 3 Long side copper plate 4 Short side copper plate 5. Variable short side frame 6 Fixed short side frame 7 Spindle for short side movement 8 Tie rod 8a Flange 8b Stepped section 9 Plunger device 9a Piston 9b Plunger chamber 9c Casing 9d bottom 10 Clamp spring 11 Worm jack 12 Short side moving drive device 13 Bracket 14 Bracket holder 15 bolts 15a Bolt hole 16 O-ring 17 Spray water pipe 18 Cooling water supply and discharge pipe 19 Waterway 20 Waterway 21 Foot shoe 22 Hose 23 Nozzle 24 Aburakuchi

Claims (3)

[Claims] 1. A long-side fixed frame (1) and a long-side movable frame (2) that can be opened and closed by remote control, and a pair of short-side frames ( 6), and the short side frame is composed of a fixed short side frame connected to a moving device, and a variable short side frame that is attached to and detached from the fixed short side frame and has a short side copper plate fixed to it. Features a variable slab thickness mold for continuous casting. [Claim 2] A cooling channel is formed in the variable short side frame, and the water supply and drainage channel of the fixed short side frame and the cooling channel of the variable short side frame are brought into contact with and separated from each other at the frame mating surface. The variable slab thickness mold for continuous casting according to claim 1. 3. The variable thickness slab mold for continuous casting according to claim 2, wherein the mating portion of the fixed short side frame and the variable short side frame is provided with an engaging portion and a connecting portion.