JPH04134249U - Continuous casting mold with adjustable width and thickness - Google Patents

Abstract

(57) [Summary] [Purpose] It has a completely different structure from conventional molds that can change width and thickness, and without significantly changing the structure and function of conventional molds that can change width. To provide a mold with a relatively simple structure and whose thickness can be changed. [Structure] In a rectangular mold flask 1, a narrow mold plate 2
are slidably opposed to each other between the wide-sided mold plates 3 at a predetermined interval, and are provided on the opposing inner surfaces 7 of the wide-sided mold plates 3.
Projections 8 having a height half the size and thickness of the slab to be cast are provided on both left and right sides of the cast slab. The mold flask 1 also includes a driving means 4 for driving the narrow mold plate 2 forward and backward, a driving means 5 for driving the wide mold plate 3 forward and backward, and a drive means 5 for driving the wide mold plate 3 in a manner that corresponds to the changing slab thickness. A stopper 6 for positioning is provided, and the forward/backward driving means 4 and the forward/backward driving means 5 are connected to the narrow mold plate 2 and the wide mold plate 3, respectively, and the positioning stopper 6 abuts behind the wide mold plate 3. It is considered possible.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is for continuous casting where the width and thickness can be changed, allowing the thickness of the slab to be changed in two levels: large and small. This invention relates to mold equipment.

0002

[Conventional technology]

Conventionally, continuous casting molds in which only the width can be changed have been widely used. child As shown in FIG. 4, the mold consists of a pair of narrow-sided molds inside a square mold flask 31. The plate 32 and the wide mold plate 33 are connected via drive means 34 and 35, and the narrow mold plate 32 is opposed to each other. It has a structure in which it is slidably provided opposite to each other between wide-sided mold plates 33.

0003 To change the width of the slab using this mold, the wide mold plate 33 is moved slightly backward by the drive device 35. After the narrow mold plate 32 is released from the side wall surface, the cross section of the slab is When narrowing the width of the narrow mold plate 32 in the width direction using the driving device 34, If you want to widen the width, move it backwards to the desired width position, and then widen it again. Is this carried out by moving the mold plate 33 forward by the drive device 35 and pressing it against the side wall surface of the narrow mold plate 32? , or a state in which the wide-sided mold plate 33 is clamped with a force equal to the static pressure of molten steel in the mold. (soft clamp), the narrow mold plate 32 is moved to the desired width by the drive device 34 in the same manner as described above. It is done by moving to a certain position.

0004 By the way, the width-changeable continuous casting mold mentioned above has a constant cross-sectional thickness of the slab. When casting products continuously, move the narrow mold plate 32 forward or backward to adjust the width dimension. It works effectively because it can be used by simply adjusting the In actual operations, slabs with different cross-sectional thicknesses are mixed and produced. Therefore, it is often necessary to replace the mold with a mold of a different thickness. In such cases, the molds must be replaced. The problem is that the productivity of continuous casting equipment is impaired because it takes a lot of time to convert. was there.

[0005] On the other hand, in order to solve these problems, it is possible to change not only the width but also the thickness. Molds with variable width and thickness have been proposed in recent years. For example, JP-A-62-142054 The official gazette, Utility Model Application No. 63-47051, describes a pair of wide-sided mold plates and narrow-sided mold plates arranged in a ten-man character shape. The assembled mold is also described in Japanese Utility Model Application Publication No. 1989-89954, which is one of a pair of wide-sided mold plates. The movable wide-sided mold plate has a plurality of narrow-sided mold plates on the side of the movable wide-sided mold plate. The mold plate member is provided so that it can move forward and backward, and a removable spacer for changing the thickness is installed behind it. Each of the molds provided with a servo has been proposed.

[0006]

[Problem that the idea aims to solve]

Of the above molds that can change the width and thickness, the former has a continuously variable width and thickness. Although it has the advantage of being able to be changed to The structure is complicated and increases the cost of the equipment. Also, the width (or thickness) can be changed during casting. When performing this, it is necessary to slide the wide mold plate and the narrow mold plate at the same time, and both mold plates The sliding of the mold plate, especially the wide-sided mold plate, creates frictional force with the slab, which can cause cracks and other negative effects on the slab. There are concerns about problems such as adverse effects.

[0007] In addition, for the latter, the thickness can be changed by attaching and detaching the thickness changing spacer. The advantage is that the thickness can be changed to any desired thickness in stages depending on the thickness of the spacer to be attached or removed. However, each time the thickness changes, the narrow mold plate member also advances to match the thickness. There may be problems such as having to retreat, making the operation complicated.

[0008] This invention was made based on the above-mentioned circumstances, and its purpose is to It has a completely different structure from the mold that can change the width and thickness, and has been used for a long time. The width can be changed without significantly changing the structure and function of the mold. It is an object of the present invention to provide a mold whose thickness can be changed depending on the structure.

[0009]

[Means to solve the problem]

In order to achieve the above purpose, a continuous casting mold that can change width and thickness according to the present invention is a continuous casting mold device that can change the width and thickness of the slab in two levels: large and small. A pair of wide-sided mold plates and a narrow-sided mold are installed inside a rectangular mold flask through a driving means. The plates can be placed opposite each other, and the narrow mold plate can be slid between the opposing wide mold plates. In addition, large and small thicknesses are provided on both left and right sides of the inner surfaces of the opposing wide-sided mold plates. A protrusion half the height of the difference in height is provided, while a protrusion is provided on the left, right, top, and bottom of the mold flask on the back of the wide mold plate. A positioning stopper that corresponds to a large thickness, and a positioning stopper for this large thickness. and a positioning stopper corresponding to a small thickness that advances and retreats half the distance of the difference between the large and small thicknesses. It is something that has been established.

0010

[Effect]

According to the continuous casting mold of the present invention, which can change the width and thickness, A protrusion with a height half the difference in size and thickness is provided on the left and right sides of each inner surface. Therefore, by supporting the narrow side mold plate with this protrusion, the height of the protrusion and the narrow side can be adjusted. Casting a slab with a thickness that matches the width of the mold plate and the width between the protrusions. This is especially useful for molds with slab dimensions that conventionally require frequent mold replacement. By adopting a mold with a structure like this, the number of mold changes can be reduced and continuous The productivity of continuous casting equipment can be improved.

[0011] In actual continuous casting operations, the cross-sectional thickness of slabs is about 3 to 4 types at most. Generally speaking, they are grouped into two types in consideration of productivity such as replacing molds. , The thickness of the slab can be changed in two levels, large and small, like the continuous casting mold of this invention that can change the width and thickness. It is possible to sufficiently improve the productivity of continuous casting by configuring it so that it can be changed.

0012

【Example】

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a front view of a continuous casting mold that can change width and thickness according to the present invention, and Figure 2 is Figure 1. It is an AA sectional view of.

[0013] In the figure, 1 is a rectangular mold flask, 2 is a narrow mold plate, 3 is a wide mold plate, and 4 is a narrow mold plate. 5 is a means for driving the mold plate 2 forward and backward; 5 is a means for driving the wide mold plate 3; 6 is a means for driving the wide mold plate 3; The forward/backward driving means 4 and the forward/backward driving means 5 are connected to the narrow mold plate 2. The output shaft is provided in the mold flask 1 behind each of the wide mold plate 3 and the narrow mold plate 2. It is connected to a wide mold plate 3.

[0014] The narrow mold plates 2, 2 are slidably arranged between the wide mold plates 3, 3 at a predetermined interval. The wide mold plates 3, 3 have both left and right sides of the opposing inner surfaces 7, 7. A protrusion 8 is provided at a height that is half the difference in thickness between the large and small slabs to be cast.

[0015] Positioning stoppers 6 are provided at the left, right, top and bottom of the mold flask 1 behind the wide mold plate 3. , the details are as shown in Figure 2, a bush 10 is provided in the hole 9 provided in the mold flask 1. , a positioning screw that can be slid inside this bush 10 and has a thick end surface. A cylinder 13 formed on the top surface 11 and having a flange 12 at the other end is inserted, and this cylinder Inside the cylinder 13, a positioning stopper surface 14 is formed whose tip surface corresponds to a small thickness. Insert the rod body 17 with the head part 15, and insert the cylinder into the internal threaded part 16 of the rod body 17. It is constructed by connecting a rotary actuator 18 fixed to the flange 12 of the da 13. There is.

[0016] Furthermore, in this example, the upper and lower positioning stops 6a and 6b are placed behind the mold flask 1. A hole 20 is provided in the center of the upper and lower holes 9, 9 of the mold flask 1. When a rotary actuator 22 with a screw shaft 21 connected is fixed in this hole 20, The tip of the screw shaft 21 is connected to the center of the yoke 19 by a pin 23. This is it By driving the rotary actuator 22, the vertical positioning stopper 6a is and 6b can move forward and backward relative to the mold flask 1. (The partial diagram shown above the center line in Figure 2 is (indicates a retired state)

[0017] Note that 24 is provided behind the wide mold plate 3 facing the tip of the positioning stopper 6. a clamping cylinder for a wide-sided mold plate 3 with a rod (not shown) at the end thereof. The surface can come into contact with the tip of the positioning stopper 6. This clamp cylinder 24 is installed only behind the wide mold plate 3 on the non-reference side, and a dummy block is used as a substitute for the reference side. You may.

[0018] Regarding thickness changes using the continuous casting mold with the above configuration that can change width and thickness, This will be explained with reference to the conceptual diagram shown in FIG. In addition, in Figure 3, the thickness is changed by 50mm. This is an example of a case where changes are made. In addition, 25, 26 and 27 in the figure are the mold vibration tubes in which the mold flask 1 is installed. a drive cylinder provided on a cable (not shown) for moving the mold flask 1 forward and backward; Positioning of the mold flask 1 when the reference side of the wide mold plate 3 is aligned with the small thickness reference side position Mold when the reference side of the wide mold plate 3 is aligned with the large thickness reference side position. The positioning stops of frame 1 are shown respectively.

[0019] In the state shown in FIG. 3a, the rotary actuator 18 of the positioning stopper 6 is actuated. Fix the positioning stopper surface 14 of the rod body 17 at a position protruding 25 mm, and When the wide mold plate 3 is brought into contact with the mold plate 3 and the size of the slab with a small thickness is positioned within the mold flask 1. In addition, the mold flask 1 is brought into contact with the positioning stopper 26 by the driving cylinder 25, and the casting is performed. A state in which the inner surface of the wide-sided mold plate 3 on the reference side is aligned with the mold reference line position is shown.

[0020] To change the thickness by 50 mm from the above condition, use the rotary actuator of the positioning stopper 6. actuator 18 to move the positioning stopper surface 14 of the rod body 17 to the positioning stopper surface. Move back from 11. Next, the wide mold plate 3 is moved to the opposite protrusion by the advance/retreat drive means 5. The space between the parts 8 (25 mm protrusion) is wider than the width of the narrow mold plate 2, and the narrow mold plate 2 is moved back between the protrusions 8 of the wide mold plate 3 by the forward/backward driving means 4. Not yet at this time The mold flask 1 remains in contact with the positioning stopper 26 by the drive cylinder 25. There is. (Status shown in Figure 3b)

[0021] Thereafter, as shown in FIG. 8, sandwich the narrow side mold plate 2 between them, and operate the clamp cylinder 24 to cast the wide side. The narrow mold plate 2 is pressed between the mold plates 3 and clamped. This allows the wide surface of the reference side to The inner surface of the mold plate 3 is located 25 mm back from the mold reference line position.

[0022] Next, the drive cylinder 25 is operated to position the mold flask 1 at a position opposite to the stopper 26. Press it against the positioning stopper 27 provided at. This moving distance is for changing the thickness of 50mm. It is set to half, 25mm. This resulted in a continuous casting mold with a thickness increased by 50mm. , align the inner surface of the wide mold plate 3 on the reference side with the mold reference line position, and then move the mold vibration table. It will be set to (Situation shown in Figure 3d)

[0023] In this way, the continuous casting mold of the present invention, which can change the width and thickness, allows the thickness of the slab to be changed. used accordingly.

[0024] On the other hand, in the continuous casting mold of the present invention that can change the width and thickness, the rotary actuator The upper and lower positions connected via the yoke 19 are activated by protruding the motor 22. The cylinders 13 of the positioning stoppers 6a and 6b can be moved back by about 10 mm. to this Cleaning, etc. can be performed by leaving a gap of about 10 mm between the abutting surfaces of the wider mold plate 3 and the narrower mold plate 2.

[0025] In addition, in this example, the movement of the rod body 17 of the positioning stopper 6 and the positioning A screw mechanism (threaded part 16 and screw shaft 21) is used to move the entire female stopper 6 forward and backward. Even if the hydraulic pressure decreases, the position can be secured by self-locking, and the drive can be further improved. Since rotary actuators 18 and 22 are used as the power sources, the sliding movement Mechanical stopper only needs to be on one side. (The opposite side is the rotary actuator's (Because it stops at the low end)

[0026]

[Effect of the idea]

As explained above, the continuous casting mold according to the present invention, which can change the width and thickness, is The thickness can be changed with a relatively simple structure. Moreover, the structure and function of width change are Overall, width and thickness changes are easy to manipulate as they are similar to those of conventional width changing molds. Easy to make and practical. In addition, this allows slabs with different cross-sectional thicknesses to be molded into molds. Casting can be done in the same mold without having to change the mold, reducing the number of mold changes. , productivity of continuous casting equipment can be improved.

[Brief explanation of drawings]

FIG. 1 is a front view of a continuous casting mold that can change width and thickness according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG. 1;

FIG. 3 is a conceptual diagram for explaining thickness change in a continuous casting mold capable of changing width and thickness according to the present invention.

FIG. 4 is an explanatory diagram of the prior art.

[Explanation of symbols]

1: Mold flask 2: Narrow mold plate
3: Wide mold plate 4, 5: Advance/retreat drive means 6, 6a, 6b: Positioning stopper 7: Inner surface of wide mold plate 8: Projection part
9, 20: Hole 10: Bush 11, 14: Positioning stopper surface 12: Flange 13: Cylinder 1
5: Head part 16: Thread part 17: Rod body 18, 22: Rotary actuator 2
1: Screw shaft 23: Pin 24: Clamp cylinder 2
5: Drive cylinder 26: Stopper for positioning the mold flask for small thicknesses 27: Stopper for positioning the mold flask for large thicknesses

Claims (2)

[Scope of utility model registration request] 1. A mold device for continuous casting that can change the width and thickness of a slab in two levels, large and small, comprising: a pair of wide-sided mold plates installed inside a rectangular mold flask via a driving means; The narrow-sided mold plates are opposed to each other, and the narrow-sided mold plate is slidably provided between the opposing wide-sided mold plates, and a half of the difference in thickness is provided on both left and right sides of the inner surface of each of the opposing wide-sided mold plates. In addition to providing a height protrusion, there are also positioning stoppers that correspond to the large thickness on the left, right, top and bottom of the mold flask on the back of the wide mold plate, and small positioning stops that move forward and backward relative to the large thickness positioning stoppers by a distance that is half the difference between the large and small thicknesses. A continuous casting mold capable of changing width and thickness, characterized by being provided with a positioning stopper corresponding to the thickness. 2. A positioning stopper corresponding to the large and small thickness is provided inside a cylinder having one end surface formed as a positioning stopper surface corresponding to the large thickness and a flange at the other end, and the one end surface is provided inside the cylinder. A rod body is formed on a positioning stopper surface corresponding to the thickness, and the small thickness positioning stopper surface can protrude from the large thickness positioning stopper surface by half the distance of the difference in thickness, and is connected to the other end of this rod body. and a drive device for driving the rod body supported by the flange of the cylinder forward and backward, and the cylinder is inserted into holes formed in the upper and lower parts of the mold flask through bushings, while the upper and lower cylinders The width and width according to claim 1 are connected by a yoke, and the center portion of the yoke is connected to a driving means provided in the mold flask.
Continuous casting mold with variable thickness.