JPH0461735B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a continuous casting machine for thin slabs in which a long-side mold is constituted by a pair of circulating bodies, and in particular, the present invention relates to a continuous casting machine for thin slabs in which a long side mold is constituted by a pair of circulating bodies. The present invention relates to a continuous casting machine having a structure that allows easy attachment and detachment of short side molds placed oppositely near the side edges.

[Conventional technology]

Conventional continuous casting machines have a structure in which the back plate of the short side mold is fixed to the main body frame of the casting machine via bolts and retaining plates, as described in Japanese Patent Application Laid-Open No. 169141/1983. .

On the other hand, in conventional casting machines for thick slabs,
As described in "Tetsu to Hagane" No. 67 (1981), No. 8, p. 7, a clamping device is used to directly clamp the short side mold between the long side molds, and a short side mold width changing device is used to shorten the short side mold. There are some that perform edge preservation. These devices 1
The formula is housed in a common frame for molding equipment,
Molds are exchanged for each common frame.

[Problem to be solved by the invention]

In a continuous casting machine, a long side circulation body, that is, a belt with a constant width in the thickness direction of the slab, is installed between the widthwise side of the short side mold and the long side cooling frame, through which the belt and the cooling water on the back side of the belt pass. A certain amount of space must be ensured, and if this is not ensured, it will be difficult to perform the casting operation smoothly.

That is, if this gap is too small, it becomes difficult to pass through the long side surface circulation body and to supply cooling water. If it is too large, the water pressure will drop on the back side of the belt because the amount of cooling water supplied is constant, and the molten metal will likely be inserted into the sliding surface between the belt and the short side mold. This often results in the belt becoming unable to circulate and the solidified slab breaking, that is, breaking out.

On the other hand, unlike the long side circulation body, the short side mold has a fixed installation structure as a whole, so the casting direction and The load in the thickness direction of the slab must be supported.

As mentioned above, the short side mold is equipped with a centering device to ensure constant spacing in the thickness direction of the slab, and a casting mold created by the pulling resistance from the solidified slab and the sliding resistance from the long side circulation body. Sufficient rigidity is required to support loads in the single casting direction and the thickness direction of the slab.

Furthermore, it is desirable to set the short-side mold immediately before the start of casting, taking into account damage to the refractories constituting the short side and prevention of dew condensation on the mold surface. In addition, it is necessary for the installation to be easy in order to improve work efficiency.

However, in the continuous casting machine described in JP-A No. 61-169141, adjustment of the spacing in the thickness direction of the slabs, that is, centering, is performed by tightening the bolts and retaining plates that connect the back plate of the short side mold to the main body frame. Subtle adjustments are made depending on the situation.
There was a problem in that centering took time and it was difficult to set up just before starting casting, and because the holding and centering of the short sides were performed by a common member, the short sides could not be attached easily.

In addition, since the structure supports the back plate of the short side mold through the bolt rod part of the bolt by simply tightening the retaining plate and bolts, this is caused by the pull-out resistance from the solidified slab and the sliding resistance of the long side circulation body. It has been difficult to ensure sufficient rigidity against loads in the slab casting direction and the slab thickness direction.

Furthermore, since the short-side mold is directly fixed to the main body frame, the mold width cannot be changed once the short-side mold is attached to the main body frame, and the mold width cannot be changed at any other time, including during casting. is unable to respond. The production equipment had technical problems.

On the other hand, the latter prior art device described in "Tetsu to Hagane" No. 67 (1981) No. 8, p. 7 uses a fixed long side mold without using a long side circulating body. Since the short side mold is directly sandwiched between the fixed long side mold, it is difficult to create gaps between the two, and centering work is relatively easy. The structure is essentially different from the continuous casting machine to which the present invention relates, which requires a long time, and it is difficult to apply the conventional technology thereto.

Therefore, an object of the present invention is to provide a continuous casting machine that allows easy centering and installation of a short side mold, has sufficient rigidity, and can change mold width at any time. be.

[Means for solving problems]

The above purpose is to construct a short side mold assembly with a short side mold and its back plate, and to provide a mold with a guide frame that supports the back plate separately from the short side mold assembly on the main body frame. A width changing device is installed, and a fastening device is provided between the short side mold assembly and the mold width changing device to detachably mount the short side mold assembly on the mold width changing device, and a fastening device is provided between the short side mold assembly and the mold width changing device, and By creating a centering reference surface in the slab thickness direction, and constructing a slab thickness direction centering device by this reference surface and a pressing device that presses the short side mold assembly and the mold width changing device against this reference surface. will be achieved.

[Effect]

The short side mold is installed by placing its back plate on the guide frame of the mold width changing device and locking it with a fastening device. At this time, the mold width can be adjusted in advance using a separate mold width changing device before mounting the short side mold assembly. Centering in the thickness direction of the slab is performed simply by pressing the short side mold assembly and the mold width changing device against a reference surface provided on the main body frame using the pressing device of the centering device in the thickness direction of the slab. Therefore, it becomes easy to center and attach the short side mold, and it becomes possible to set the short side mold in a short time before starting casting. In addition, the load in the slab casting direction caused by the pulling resistance from the slab and the sliding resistance from the long side circulating body is supported by the induction frame, and the load in the slab thickness direction is supported by the reference surface of the main frame and the pressing device. be done. Horizontal loads are supported by the mold width changing device. This dramatically improves the holding rigidity of the short side mold. Furthermore, the mold width changing device, which is separate from the short side mold assembly, can be operated at any time after the short side mold is installed, and can change the mold width at any time, including during casting. possible.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the main parts of a continuous casting machine according to an embodiment of the present invention, and FIG. 2 shows the entire continuous casting machine.
Reference numerals 1 and 2 in the figure represent a pair of long-side circulation bodies arranged opposite to each other at a predetermined interval, each of which is made by endlessly forming a stale material, and is stretched around guide rollers 3 and 4 and a tensioning roller 5. , by driving the guide rollers 3 and 4. A pair of short side molds 6 and 7 are arranged facing each other near the side edges between the long side circulation bodies 1 and 2. Short side mold 6, 7
is mainly made of copper-based metal, which has good thermal conductivity. These short side molds 6 and 7 are fixedly held on the main body frame 8 by a mechanism to be described later, thereby maintaining a sliding relationship with the long side circulating bodies 1 and 2 and forming a casting space between them.

The short-side molds 6 and 7 are integrated with back plates 9 and 10 having L-shaped back portions by bolting to form short-side mold assemblies 11 and 12 to ensure rigidity.

The main body frame 8 includes a short side mold assembly 11,
A mold width changing device 13 (only one of which is shown), which is separate from the mold width changing device 12, is installed. This mold width changing device 13
The guide frame 14 supports the back plate 9 of the short side mold assembly 11.
This shape supports the short side assembly 11 in the vertical and horizontal directions.

At the upper and lower ends between the back plate 9 and the guide frame 14, two fastening devices 15 and 16 are provided for removably mounting the short side mold assembly 11 on the mold width changing device 13; Further, between the upper horizontal portion of the back plate 9 and the guide frame 14, a finely adjustable vertical centering device 17 for centering the vertical position of the short side mold 6 is provided.

Further, main body frames 18 and 19 are located adjacent to each other on both sides of the short side mold assembly 11 and the mold width changing device 13, as shown in FIG. Centering reference surfaces 20 and 21 in the slab thickness direction are provided in the range, and the other main frame 10 is provided with centering reference surfaces 20 and 21 in the slab thickness direction.
Guide frame 1 of mold width changing device 13 at 0,21
4 and the back plate 2 of the short side mold assembly 11
Pressing devices 22 and 23 for pressing 2 are provided,
These reference surfaces 20, 21 and pressing devices 22, 23 constitute a centering device 24 in the slab thickness direction.

The mold width changing device 13 includes at least a pair of upper and lower hydraulic power actuators 25 and 26 that are provided between the guide frame 14 and the main frame 8 and are capable of fine adjustment. These power actuators 25 and 26 are pivotally connected to the main body frame 8 at their cylinder portions, and are pivotally connected to the guide frame at the tips of their piston rods. In particular, the lower power actuator 26 is pivotally connected via a movable bearing 27 supported so as to be movable in the horizontal direction on the main body frame 8, and this movable bearing allows the guide frame 14 to be connected to the power actuator. It moves horizontally in synchronization with the movement of 26, and provides a turning fulcrum when mold taper is applied.

As shown in FIGS. 4 and 5, the movable bearing 27 has a slider 30 that slides on the main body frame 8 between dovetail guides 28 and 29, and a pin 31 provided on the slider 30 Guidance frame 14
The hanging portion 32 of the power actuator 26 and the piston rod tip 33 of the power actuator 26 are pivotally connected. That is, the guide frame 14 and the power actuator 26
A common pin 31 is used and the fulcrum is the same.

The fastening device 15 has a key-shaped lock piece 36 provided at the tip of the piston rod of the hydraulic actuator 35, as shown in an enlarged view in FIG.
It is pivotally connected to the upper end of the body by a pin 37. Also, from the rear end of the lock piece 36 is a hydraulic actuator 35.
The retainer rods 39 and 40
Spring rings 41 and 42 are arranged between the tips of the retainer rods 39 and 40 and the base plate 38 to bias the lock piece 36 in the locking direction.

The fastening device 16 also has a generally similar configuration.
That is, as shown in an enlarged view in FIG. 7, the tip of the piston rod of the hydraulic actuator 43 has a key-shaped lock piece 4 inserted into the hanging portion 32 of the guide frame 14.
4 is provided, and the cylinder portion of the hydraulic actuator 43 is pivotally connected to the lower end of the guide frame 14 by a pin 45. Further, a spring ring 47 is disposed between a base plate 46 provided at the rear end of the lock piece 44 and the guide frame hanging portion 32 for biasing the lock 44 in the locking direction.

As shown in FIGS. 8 and 9, the vertical centering device 17 includes a fixed wedge member 50 screwed to the upper surface of the guide frame 14, and is placed on the wedge surface of the fixed wedge member 50. A movable wedge member 51 that slides on the movable wedge member 51 is rotatably supported at one end of the movable wedge member 51, and this screw 52 is screwed into the end face of the fixed wedge member 50 on the same side. ing.

pressing device 22 of the slab thickness direction centering device 24;
23 are each composed of a small hydraulic actuator attached to the main body frame 19.

The vertical fastening surfaces 60 and 61 of the back plate 9 of the short side assembly 11 and the guide frame 14 of the mold width changing device 13 are provided with cooling water connection holes 62, 63 and 64, as shown in FIG. 65 is open, and one fastening hole 63, for example, in the fastening surface 61,
At 65, annular face seal packings 66 and 67 made of flexible material are arranged. As shown in FIG. 11, the face seal packings 66 and 67 seal the connection holes 62 and 63 in a state where the fastening surfaces 60 and 61 are brought together, and also prevent vertical deviation of the connection holes 62 and 63. It is designed to give a stroke 7 that can be finely adjusted.

Next, a description will be given of the installation work of the short side mold in the continuous casting machine configured as described above.

First, before mounting the short side mold 6 on the mold width changing device 13, the mold width is set and the mold taper is provided. Setting mold width, power actuator 2
5 and 26 to horizontally move the guide frame onto the main body frame 8 via the moving bearing 27. The mold taper is provided by providing a stroke difference between the upper and lower power actuators 25 and 26 and by rotating the guide frame 14 about the pin 31 as a fulcrum. At this time, the pivot point of the guide frame 14 and the power actuator 26 is the same as the pin 31, and since the bearing 27 is configured to move only in the horizontal direction, the mold width and taper are adjusted based on the power actuator 26. It becomes easy to determine the amount.

After setting the mold width and applying taper, center the guide frame in the thickness direction of the slab. This is performed simply by operating the pushing device 22 to press the guide frame 14 against the centering reference surface 20.

In this way, the setting of the mold width, the provision of a mold taper, and the centering of the guide frame in the thickness direction are performed before the short sides of the mold are attached.

Next, the short side mold assembly 11 in which the short side mold 6 and the back plate 9 are assembled is carried to the mold width changing device 13 as shown in FIG. 12, and the back plate 9 is placed on the guide frame 14. . Next, the vertical centering device 17 is operated to center the mold in the vertical direction. This is done by operating the screw 52 shown in FIGS. 8 and 9 to move the movable wedge member 51 relative to the fixed wedge member 50. Next, centering of the short side mold 6 in the thickness direction of the slab is performed by a centering device in the thickness direction of the slab. Similarly to the guide frame 14, this centering is performed simply by operating the pressing device 23 and pressing the back plate 9 against the centering reference surface 21.

Next, the hydraulic actuators 35, 43 of the fastening devices 15, 16 are operated to push the lock pieces 36, 44 onto the back plate 9, and then the hydraulic actuators are released. As a result, the upper piece 36,
44 is strongly engaged with the back plate 9 by the force of the spring rings 41, 42 and 47, and the back plate 9 is locked to the guide frame 14. At this time, the cooling water connection holes 62 to 65 of the back plate 9 and the guide frame 14 are hermetically connected by face seal packings 66 and 67, as shown in FIG.
That is, it is possible to connect the cooling water connection holes simultaneously with the fastening operation of the short side mold assembly 11. This communication is the fine adjustment stroke S of the face seal packing 66, 67.
Therefore, it is possible to carry out even if a vertical shift occurs due to vertical centering.

When removing the short side mold 6, use the fastening device 1.
By extending the hydraulic actuators 35 and 43 of 5 and 16 and unlocking the upper pieces 36 and 44, the short side mold assembly 11 can be easily removed as it is.

In this way, in the continuous casting machine of this embodiment,
Adjustment of the mold width and mold taper and centering of the guide 14 in the thickness direction of the slab can be performed when installing the short-side mold 6, and the adjustment of the mold width and mold taper is performed by the guide frame 14 and the power actuator. Since the fulcrum of rotation with the motor 26 is the same as the pin 31, and the bearing 27 is configured to move only in the horizontal direction, this can be easily performed. In addition, the centering of the guide frame 14 and back plate 9 in the thickness direction of the slab is performed using the pressing device 2 on the reference surfaces 20 and 21.
2 and 23, and the installation of the short side mold assembly 11 can be done simply by pressing the back plate 9 into the mold width changing device 13.
The fastening device 15,
Just lock it at 16. Therefore, mounting and centering of the short side mold can be easily performed in a short time.
Further, the short side mold 6 can be carried in and set immediately before the start of casting.

In addition, the load in the slab casting direction, that is, the vertical direction, caused by the pulling resistance from the slab and the sliding resistance from the long side circulation body is supported by the back plate 9, the vertical centering device 17, the guide frame 14, and the moving bearing 27. The load in the thickness direction of the slab can be applied to the reference surfaces 20, 21 of the main body frame and the pressing devices 22, 23.
The horizontal load during casting can be supported by the guide frame 14 and the power actuators 25 and 26. Therefore, the holding rigidity of the short side mold can be dramatically improved.

Further, the cooling water connection holes can be connected simultaneously with the fastening operation of the short side mold assembly 11.

Furthermore, the mold width changing device 13 includes a short side mold 11
Since it can be operated at any time even after it has been installed, the mold width can be changed at any time, including during casting, which dramatically improves its usability as a continuous casting machine. do.

〔Effect of the invention〕

Therefore, according to the continuous casting machine of the present invention, the mold width can be adjusted in advance using the mold width changing device before installing the short side mold assembly, and centering in the slab thickness direction can be performed using the main body. The short side mold assembly and mold width changing device can be simply pressed against the reference surface provided on the frame using the pressing device of the slab thickness direction centering device. This can be done by placing the plate on the guide frame of the mold width changing device and locking it with the fastening device, making it easy to center and install the short side mold, and to start casting the short side mold. can be set up in a short time. Furthermore, the mold width can be changed at any time. Furthermore, the load in the slab casting direction caused by the pulling resistance from the slab and the sliding resistance from the long side circulation body is supported by the induction frame, and the load in the slab thickness direction is supported by the reference surface of the main body frame and the pressing device. Supported.
Note that the horizontal load is supported by the mold width changing device. Thereby, the holding rigidity of the short side mold can be dramatically improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the main parts of a continuous casting machine according to an embodiment of the present invention, and Fig. 2 is a schematic diagram showing the entire continuous casting machine, and a cross section taken along the - line in this figure. The figure is Fig. 1, Fig. 3 is a sectional view taken along the - line of Fig. 1, and Fig. 4 is a sectional view of Fig. 1.
FIG. 2 is an enlarged view of the moving bearing of the continuous casting machine shown in FIG.
Fig. 5 is a sectional view taken along the - line in Fig. 4, Fig. 6 is an enlarged view of the upper fastening device of the continuous casting machine shown in Fig. 1, and Fig. 7 is an enlarged view of the lower fastening device. FIG. 8 is an enlarged view of the vertical centering device of the continuous casting machine shown in FIG. 1, FIG. 9 is a sectional view taken along the line - in FIG.
The figure is an enlarged sectional view of the cooling water connection hole portion on the fastening surface between the back plate and the guide frame of the continuous casting machine shown in FIG. FIG. 12 is a schematic view showing the state in which the short side mold assembly is transported and attached to the mold width changing device. Explanation of symbols, 1, 2... Long side surface circulation body, 6, 7
... Short side mold, 8, 18, 19 ... Main body frame, 9, 10 ... Back plate, 11, 12 ...
...Short side mold assembly, 13...Mold width changing device,
14... Guide frame, 15, 16... Fastening device, 17... Vertical centering device, 20, 21...
... Centering reference plane, 22, 23 ... Pressing device, 24
... Slab thickness direction centering device, 25, 26 ... Power actuator, 27 ... Moving bearing, 62 -
65...Cooling water connection hole.

Claims (1)

[Scope of Claims] 1. A pair of long-side circulating bodies disposed opposite to each other, and a pair of short-side molds sandwiched between the pair of circulating bodies and disposed opposite to each other near their side edges. In a continuous casting machine that constitutes a mold space, a short side mold and its back plate constitute a short side mold assembly, and a guide supporting the back plate is provided separately from the main body frame short side mold assembly. A mold width changing device equipped with a frame is installed, and a fastening device is provided between the short side mold assembly and the mold width changing device to detachably attach the short side mold assembly onto the mold width changing device. , and a centering reference surface in the slab thickness direction is provided on the main body frame, and a pressing device that presses the short side mold assembly and the mold width changing device against this centering reference surface and this centering reference surface A continuous casting machine characterized by comprising a centering device. 2. The continuous casting machine according to claim 1, wherein the guide frame of the mold width changing device is supported on the main body frame via a moving bearing. 3. The mold width changing device is equipped with at least one pair of upper and lower power actuators provided between the guide frame and the main frame, and these power actuators are pivotally connected to the main frame, and the guide frame is The lower end and the lower power actuator are pivotally connected to a movable bearing supported horizontally movably on the main body frame, and the movable bearing synchronizes the induction frame with the movement of the power actuator. 2. The continuous casting machine according to claim 1, wherein the continuous casting machine is configured to horizontally move the casting machine and to provide a turning fulcrum when tapering the mold. 4. The continuous casting machine according to claim 1, characterized in that a vertical centering device is provided between the back plate of the short side mold assembly and the guide frame of the mold width changing device. 5. The continuous casting machine according to claim 1, characterized in that a cooling water connection hole is provided in the vertical fastening surface between the back plate of the short side mold assembly and the guide frame of the mold width changing device.