JPH01254353A - Continuous casting machine - Google Patents

Abstract

PURPOSE:To execute fitting of short side face mold for short time by constituting short side face assembling body with the short side face mold and back plate, laying the back plate on an introducing frame of mold width changing device and hooking with clamping device. CONSTITUTION:The short side face mold assembling body 11 is constituted with the short side face mold 6, 7 and the back plate 9, 10 thereof and also the mold width changing device 13 providing the introducing frame 14 for supporting the back plate 9, 10 is set in the main body frame 8. The clamping devices 15, 16 fitting the short side face mold assembling body 11 on the mold width changing device 13 as attachable/detachable between the short side face mold assembling body 11 and the mold width changing device 13. Successively, centering reference plane is arranged to the cast slab width direction of the main body frame 8 and a cast slab width direction centering device is constituted with the above centering reference plane and a pushing device pushing the short side face mold assembling body 11 and the mold width changing device 13. Therefore, the fitting and the centering of the short side face molds can be easily executed for short time.

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 arranged 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 and held to the main body frame of the casting machine via bolts and retaining plates, as described in JP-A-61-169141. .

On the other hand, the conventional n′? for thick slabs? In iR, “
As described in "Tetsu to Hagane" No. 67 (1981), No. 8, p. 7, using a clamping device, the short side mold is directly clamped into the long side mold, and the short side mold width changing device is used. There are some that perform short side retention. One set of these devices is housed in a common frame for molding equipment, and molds are exchanged in units of common frames.

[The problem that the invention attempts to solve]

In the continuous casting 3F2 machine, the long side circulation body, that is, the belt and the constant thickness direction of the slab for the cooling water on the back side of the belt to pass between the widthwise side of the short side mold and the long side cooling frame. A gap must be ensured, and if this is not ensured, it will be difficult to perform smooth casting work.

That is, if this gap is too small, it becomes difficult to pass the long side surface circulation body and to supply cooling water. If it is too large, the water pressure decreases on the back surface of the belt because the amount of cooling water supplied is constant, and the molten metal is likely to 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 forming the short side and prevention of dew condensation on the mold surface. In addition, it is necessary that the installation be easy and improve work efficiency.

However, in the continuous casting machine described in JP-A No. 61-169141, the adjustment of the spacing in the thickness direction of the pieces, that is, centering, is carried out by the pole I~ which connects the back plate of the short side mold to the main body frame, and the holding plate. It is necessary to make delicate adjustments depending on the tightening condition of the short side, which requires time for centering and is difficult to set just before starting casting. There was a problem in that it was not easy to store.

In addition, the back plate of the short side mold can be supported through the rod part of the bolt by simply tightening the holding plate and the bolt.
Because it is an i8 construction, it was difficult to ensure sufficient rigidity against the loads in the slab casting direction and slab thickness direction caused by the pulling resistance from the solidified slab and the sliding resistance of the long side circulation body. .

Furthermore, since the short-side mold is directly fixed to the main body frame side, once the short-side mold is attached to the main body frame, the width of the mold cannot be changed, and the width of the mold at other times including during casting cannot be changed. It was unable to respond to changes and had technical problems as a production facility.

On the other hand, the latter conventional technology "Kin to Hagane" 67th year (19th year)
81) In the device described in No. 8, page 7, a fixed long side mold is used without using a long side circulating body, and the short side mold is directly inserted into the fixed long side mold. Therefore, it is difficult to create a gap between the two, and the centering work is relatively easy. Since the structure is different, it is difficult to apply the conventional technology.

Therefore, an object of the present invention is to provide a continuous molding machine that allows easy centering and installation of a short-side mold, provides sufficient rigidity for OTI, and can change mold width at any time. It is.

[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 attach the short side mold assembly (
A mold width changing device with a guide frame that supports the back plate is installed separately from the back plate, and the short side mold assembly is inserted between the short side mold assembly and the mold width changing device. A fastening device that is separably mounted on the width changing device is provided, and a centering reference surface in the Iγ direction of the slab is provided on the main frame, and the short side mold assembly and the mold width changing are attached to this reference surface and this reference surface. This is achieved by configuring a slab thickness direction centering device with a pressing device that presses the device.

[Effect]

The short side mold is installed by placing the back grate 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 by using a separate mold width changing device before installing the short side mold assembly.6Also, centering in the direction of slab thickness can be done by This is accomplished by simply pressing the short side mold assembly and the mold width changing device against the reference surface using the pressing device of the slab thickness direction centering device. Therefore, it becomes easy to center and install the short side mold, and it becomes possible to start casting (set to nl in a short time). The load in the slab casting direction caused by sliding resistance from the rod is supported by the induction frame, the load in the direction of the hook thickness is supported by the reference surface of the main body frame and the pressing device, and the horizontal load is 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 used at any time after the short-side mold is assembled. The width of the mold can be changed at any time, including during casting.

〔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 n#i machine.

Reference numeral 1.2 in the figure indicates a pair of long-side circulation bodies arranged opposite to each other at a predetermined interval, each of which is made of endless steel material, and is connected to the guide rollers 3, 4 and the tensioning roller 5. It is circulated by driving the guide rollers 3 and 4. 1 near the side edge between the long side circulation body 1.2
A pair of short side molds 6.7 are arranged opposite each other. The short side mold 6.7 is mainly made of copper-based gold which has good thermal conductivity. These short side molds 6, 7 are fixedly supported on the main body frame 8 by a mechanism to be described later, thereby forming a casting space between them while maintaining a sliding relationship with the long side circulating body 1.2.

The short side mold 6.7 is integrated with a back plate 9.10 having an L-shaped rear part by tightening bolts to form an oval short side mold assembly 11.12 to ensure rigidity.

The main body frame 8 is equipped with a mold width changing device that is separate from the short side mold assemblies 11 and 12. ! , 13 (only one shown) is installed. This mold width changing device 13 is equipped with a guide frame 14 that supports the back plate 9 of the short-side mold assembly 11, and the guide frame 14 has its front part aligned with the L-shaped rear part of the back plate 9. It has a corresponding shape, which provides vertical and horizontal support for the short side assembly 11.

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

Further, on both sides of the short side mold assembly 11 and the mold width changing device 13, there are main body frames 18 and 19 as shown in FIG.
One main body frame 18 is provided with a centering reference surface 20.21 in the spindle thickness direction in the mold width changing stroke range, and the other main body frame 10 is provided with a centering reference surface 20.21 on this reference surface 20.21. Guide frame 1/1 of mold width changing device 13 and back play h of short side mold assembly 11
A pressing device 22.23 is provided for pressing the base plate 22, and the reference surface 20.21 and the pressing device 22.23 constitute a centering device 24 in the thickness direction of the slab.

The mold width changing device 13 includes at least a pair of upper and lower hydraulic power actuators 25 that are provided between the guide frame 14 and the main frame 8 and are capable of fine adjustment.
．． It is equipped with 26. These power actuators 25
．． 26 is pivotally connected to the main body frame 8 at its cylinder portion, and pivotally connected to the guide frame at its piston rod tip. 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. It moves horizontally in synchronization with the movement, and provides a turning fulcrum when applying a mold taper.

As shown in FIGS. 4 and 5, the movable bearing 27 has a slider 30 that slides between dovetail guides 28 and 29 on the wooden frame 118, and a pin 31 provided on the slider 30. A hanging portion 32 of the guide frame 14 and a piston rod tip 33 of the power actuator 26 are pivotally connected to each other. That is, the guide frame 14 and the power actuator 26 use a common pin 31 and have the same fulcrum.

The fastening device 15 has a muscle-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. They are pivotally connected by a bin 37. Further, from the rear end of the lock piece 36, a retaining rod 39.
40 extends, and a spring ring t11.42 is disposed between the tip of the retaining rod 39.40 and the base plate 38 for biasing 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, a muscle-shaped lock piece 411 is provided at the tip of the piston rod of the hydraulic actuator 43 and is inserted into the hanging part 32 of the guide frame 14. Guidance frame 14
It is pivotally connected to the lower end of the pin 45 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 to bias the lock piece 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 a wedge surface of the fixed wedge member 50, and A operating screw 52 is rotatably supported at one end of the movable wedge member 51, and this screw 52 is connected to the fixed wedge member 5.
0 on the same side.

The pressing devices 22 and 23 of the slab thickness direction centering device 24 are as follows:
Each consists of a small hydraulic actuator attached to one main body frame.

Respective vertical fastening surfaces 60 between the back plate of the short side assembly 11 and the guide frame 14 of the mold width changing device 13
．． 61 has a cooling water connection hole 62. as shown in FIG.
63 and 64.65 are open, and an annular face seal backing 66.67 made of a flexible material is disposed in the connecting hole 63.65 of one fastening surface, for example the fastening surface 61. These face seal backings 66, 67, as shown in FIG.
A finely adjustable stroke S is provided for a vertical deviation of 2.63.

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 a mold taper is provided. The mold width is set by operating the power actuators 25 and 26 to horizontally move the guide frame onto the main body frame 8 via the movement 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 at the pin 31, and since the bearing 27 is configured to move only in the horizontal direction, the mold width and taper amount are determined with the power actuator 26 as a reference. It becomes easy.

After setting the mold width and applying a taper, the guide frame is centered in the thickness direction of the slab. This is done by simply operating the pressing device 22 to press the guide frame 14 against the centering reference surface 20. It is done uniquely.

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 are combined 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. 6 Then vertical centering device 17
Operate to center the mold in the vertical direction. This is the 8th
The slab of the short side mold 6 is formed by the centering device in the thickness direction of the slab, which is performed by operating the screw 52 shown in FIGS. Centering in the thickness direction is performed.

This centering is also performed by the pressing device 23 as well as the guide frame 14.
This is performed simply by operating the back plate 9 and pressing the back plate 9 against the centering reference surface 21.

Then the hydraulic actuator 35. of the fastening device 215.16.
43 is operated to extend the lock pieces 36, 44 onto the back plate 9, and then the hydraulic actuator is released. As a result, the upper piece 36° 44 is attached to the spring ring 41.
．． strongly engages the back plate 9 with forces 42 and 47;
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 a face seal seal 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 can be effected by the fine adjustment stroke S of the face seal backings 66, 67 even if vertical centering causes only vertical deviations.

When removing the short side mold 6, extend the hydraulic actuator 35.43 of the fastening device 15.
．． By unlocking 44, the short side mold assembly 11
It can be easily removed as it is.

In this way, in the continuous casting machine of this embodiment, the short side 5
It is possible to adjust the mold width and mold taper and to center the guide frame 14 in the thickness direction of the slab before mounting the A-type 6.Moreover, the mold width and mold taper can be adjusted by the guide frame 14 and the power actuator 26. The pin 31 is used as the same fulcrum for pivoting, and the bearing 27 is configured to move only in the horizontal direction, so this can be done easily.

In addition, the centering of the guide frame 14 and back plate 9 in the thickness direction of the slab is performed using a pressing device 22.2 on the reference surface 20.21.
This can be done uniquely by simply pressing in step 3.
Furthermore, the short side mold assembly 11 can be installed by placing its back plate 9 on the guide frame 14 of the mold width changing bag y113 and locking it with the fastening device 15.16. Mounting and centering 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 supported by the reference plane 20.21 of the main body frame and the pressing device 22.23, and the 11 loads in the horizontal direction during casting can be supported by the guide frame 14 and the power actuator 25. It is possible to support it with .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 can be operated at any time even after the short side mold 11 is installed, so the mold width can be changed at any time, including during childhood. , its usability as a continuous casting machine has improved dramatically.

〔Effect of the invention〕

Therefore, according to the continuous casting machine of the present invention, the mold width can be adjusted by
This can be done in advance using a mold width changing device before installing the short side mold assembly, and centering in the slab thickness direction can be done by attaching the short side mold assembly and changing the mold width to the reference plane provided on the main body frame. This can be done by simply pressing the device with the pressing device of the slab thickness direction centering device.To install the short side mold, place the back plate on the guide frame of the mold width changing device, and press the fastening device. Since this can be done by locking the short-side mold, it becomes easy to center and install the short-side mold, and the short-side mold can be set in a short time before starting casting. 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 fl casting machine according to a repair example of the present invention, and Fig. 2 is a schematic diagram showing the entire continuous casting machine. Figure 1 is a cross-sectional view taken along the line ■-■ in Figure 1, and Figure 4 is an enlarged view of the moving bearing of the continuous casting machine shown in Figure 1. 5 is a sectional view taken along line v-v 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. FIG. 8 is an enlarged view of the vertical centering device of the continuous casting machine shown in FIG. 1, and FIG. 9 is an enlarged view of the fastening device shown in FIG.
10 is an enlarged sectional view of the cooling water connection hole portion on the fastening surface between the back plate and the induction frame of the continuous casting machine shown in FIG. 1, and FIG. 11 (A ) and (B) are a sectional view and a front view showing the state in which the fastening surfaces are joined, and FIG. 12 is a schematic diagram showing the state in which the short side mold assembly is transported and attached to the mold width changing device. be. Explanation of symbols 1.2...Long side surface circulation body 6.7...Short side surface mold 8
．． 18.19... Main frame 9.10... Back plate 11.12... Short side mold assembly 13... Mold width changing device 14... Guide frame 1
5.16... Fastening device 17... Vertical centering device 20.21... Centering reference surface 22.23... Pressing device 24... Slab thickness direction centering device 25.26. ...Power actuator 27...Movement bearings 62-65...Cooling water connection hole Applicant: Hitachi, Ltd.

Claims (5)

[Claims] (1) A pair of long side surface circulation bodies arranged oppositely, and these 1
In a continuous casting machine in which a mold space is formed by a pair of short-side molds sandwiched between a pair of circulating bodies and placed opposite to each other near their side edges, the short-side mold and its back plate form a short-side mold. A mold width changing device is installed on the main body frame separately from the short side mold assembly and has a guide frame that supports the back plate, and the short side mold assembly and the mold width changing device are installed on the main body frame separately from the short side mold assembly. A fastening device is provided between the device and the short side mold assembly to removably 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 this centering reference surface A continuous casting machine comprising: a pressing device for pressing a short side mold assembly and a mold width changing device onto the centering reference surface; and a centering device in the direction of slab thickness. (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 includes 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 lower end of the guide frame The lower power actuator is pivotally connected to a moving bearing supported horizontally movably on the main body frame, and the guiding frame is horizontally moved in synchronization with the movement of the power actuator by this moving bearing. 2. The continuous casting machine according to claim 1, wherein the continuous casting machine is provided with a turning fulcrum when applying a mold taper. (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. .