JPH0444298Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a dummy bar connection structure in horizontal continuous casting equipment.

Conventionally, in horizontal continuous casting, for example, as shown in FIG. 5, a tundish 1 and a mold 2, which are assembled in a connected state in a workshop before the start of casting, are placed on a tundish stand 3 and a mold stand 4 of a casting line. to be installed. Next, the head bar 8 connected to the tip of the dummy bar body 7 that is guided by the vertical guide roller 6 on the horizontal guide roller 5 is inserted into the mold 2, and then the on-off valve 9 of the tundish nozzle 1a is opened to remove the head bar 8. Pour the molten metal 11 around the dummy bar head 10 at the tip,
The tip of the billet (slab) cast from the mold 2 and the head bar 8 are connected. Next, the dummy bar body 7 is moved while being intermittently pushed back (reverse movement) to continuously cast billets. The above pushback is performed to improve the surface quality of the billet.

Problems to be Solved by the Invention According to the above-mentioned conventional structure, when the head bar 8 was inserted into the mold 2, the axis of the mold 2 and the axis of the head bar 8 were sometimes misaligned. In that case, adjusting the axis of the mold 2 attached to the tundish 1 and adjusting the axis of the dummy bar main body 7 to which the head bar 8 is connected is extremely difficult and difficult. When inserted into the mold, the inner wall of the mold 2 was damaged, and the entrance of the mold 2 could not be completely closed due to the dummy bar head 10 at the tip of the head bar 8.

The present invention solves the above problem by providing a connection bar between the head bar and the dummy bar body.When assembling the tundish and mold in the workshop, the head bar is inserted into the mold, and the dummy bar body is assembled with the head bar inserted into the mold. An object of the present invention is to provide a connection structure for a dummy bar in horizontal continuous casting equipment, which can easily and reliably connect a head bar and a connecting bar, and can prevent damage or poor connection caused by insertion of the head bar into a mold.

Means for Solving the Problems In order to solve the above problems, the present invention includes a head bar that is removably inserted into a mold and has a dummy bar head at its front end, and a dummy bar body that moves while being guided by guide rollers. A first spherical seat is provided at the connection portion between the head bar and the connection bar, the front end of the head bar side having a hole for a bolt, and the rear end of the connection bar side having a convex shape on the front surface. a connecting pin having a flange formed with a flange, and a first connecting pin having an axial center portion through which the connecting pin passes through and a back surface slidably engaging with the first spherical seat.
a first receiving member having a spherical catch; a locking member through which a connecting pin passes through the shaft center and is fixed to the connecting bar to support the front surface of the first receiving member; and a locking member connected to the shaft center. an intermediate member through which the pin passes and a convex second spherical seat is formed on the front surface and whose back surface is supported by the locking member; A second receiving member in which a second spherical seat with which the spherical seat is slidably engaged is formed and whose front surface is supported by the rear end surface of the head bar, and a connecting pin insertion hole formed at the rear end of the head bar. It has a structure having a clasp that is fitted across the clasp hole of the inserted connecting pin and the clasp locking hole formed in the head bar to connect the connecting pin to the head bar.

Function In the above configuration, the flange at the rear end of the connecting pin is
The first spherical seat on the front side of the flange is swingably locked to the connection bar by the locking member via the first receiving member that slidably engages with the first spherical seat on the back side. An intermediate member whose shaft center portion is penetrated by the connecting pin and has a convex second spherical seat on opposing surfaces, and a second spherical seat that slidably engages with the second spherical seat; The receiving member No. 2 is interposed between the front surface of the locking member and the rear end surface of the head bar, the connecting pin is inserted into the insertion hole at the rear end of the head bar, and the connecting pin is drawn toward the head bar side with a pusher and fixed. Therefore, even if there is a misalignment or inclination between the head bar axis and the connecting bar axis, the connecting pin will not allow the first spherical seat to slide on the first spherical seat of the first receiving member. an intermediate member in which a second spherical seat slides on a second spherical seat; Since the second receiving member allows the head bar and the connecting bar to be connected easily and reliably, there is no play in the joint part even when the slab is moved due to pushback and is pulled out.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. The same members as in the conventional example are given the same reference numerals and their explanations will be omitted.

In FIG. 2, a head bar 21 whose front end side having a dummy bar head 10 is inserted into a mold 2 while leaving a rear end portion is connected to a dummy bar main body 10 which is placed on a horizontal guide roller 5 of a casting line and is moved. A connection bar 22 is connected between them, and the connection bar 22 and the dummy bar body 7 are removably connected in the same axial direction by a known means such as a screwdriver, and the head bar 21 and the connection bar 2
2 and the dummy bar body 7 constitute a dummy bar.

As shown in FIG. 1, a connecting pin 23 for connecting the head bar 21 and the connecting bar 22 is disposed at the connecting portion A between the head bar 21 and the connecting bar 22. As shown in FIG.

A socket hole 23b is formed at the front end of the connecting pin body 23a on the head bar 21 side, and at the rear end, a point O on the axis of the connecting pin 23 is aligned with the spherical center. The connecting pin 23 is provided with a flange 23d on which a convex first spherical seat 23c is formed, and the flange 23d is located in a recess 24 formed in the front end surface of the connection bar 22. The first receiving member 25 has a through hole 25a through which the connecting pin body 23a passes through the axial center, and a through hole 26 through which the connecting pin body 23a passes through the axial center.
It is swingably locked to the connection bar 22 by a locking member 26 having a shape. That is, the first receiving member 25 has the first spherical seat 2 of the connecting pin 23 on the back surface.
3c, the first spherical catch 25b is slidably engaged with the first spherical catch 25b.
is formed, and the front surface is slidably supported on the back surface of the locking member 26, and the locking member 2
6 is fixed to the front end surface of the connection bar 22 with a mounting bolt 27.

The locking member 26 and the rear end surface 2 of the head bar 21
An intermediate member 28 and a second receiving member 29 are interposed between the intermediate member 28 and the second receiving member 29, each having through holes 28a and 29a formed in the shaft center portion thereof, through which the connecting pin body 23a passes. The intermediate member 28 has a back surface facing the mounting member 2.
6, and has a spherical center O which is the same as the first spherical seat 23c of the connecting pin 23 on the front surface.
A convex second spherical seat 28 is formed.
Further, the second receiving member 29 has an intermediate member 2 on the back side.
A second spherical seat 29b is formed to slidably engage with the second spherical seat 28b of No. 8, and its front surface is supported by the rear end surface 21a of the head bar 21.

A retaining flange 29c is formed on the rear end circumference of the second receiving member 29, and prevents the cylindrical retaining member 31 fixed to the locking member 26 around the intermediate member 28 with the mounting bolt 30 from coming off. The retaining flange 29c is locked by the retaining protrusion 31a, and the second receiving member 2
9 and the intermediate member 28 from the connecting pin 23a. Note that when the head bar axis A and the connecting bar axis B are coaxially connected as shown in FIG.
A gap a is locked between C and the inner circumferential surface of the retaining member 31, and a gap b is formed between the back surface of the retaining flange 29c and the rear surface of the retaining protrusion 31a. It is configured to allow displacement of the second receiving member 29 when the center A and the connecting bar axis B are misaligned.

A connecting pin body 23 is provided on the rear end surface of the head bar 21.
A connecting pin insertion hole 32 into which the head bar 21 is inserted is formed on the axis A of the head bar, and at the rear end of the head bar 21, a locking hole 33 is provided which intersects the connecting pin insertion hole 32 orthogonally and whose front and back width becomes smaller as it goes downward. It is installed vertically. This locking hole 33 and the connecting pin 23
A connector 34 is fitted into the connector hole 23b from above, and pulls the connecting pin 23 toward the head bar 21 to connect and fix the head bar 21 and the connecting bar 22.

Note that the first receiving member 25, the locking member 26,
The inner diameters of the through holes 25a, 26a, 28a, 29a of the intermediate member 28 and secondly the receiving member 29 as well as the connecting pin insertion hole 32 are set larger than the outer diameter of the connecting pin main body 23a by a predetermined amount, and the connecting pin 23 is A predetermined amount of inclination or parallel displacement is allowed within each of the through holes 25a, 26a, 28a, 29a and the connecting pin insertion hole 32. Further, the width L in the left-right direction of the socket hole 23b of the connecting pin 23 is formed so as to have a gap on the left and right sides of the socket 33, as shown in FIG. 3, to allow the connecting pin 23 to tilt.

Next, the effect will be explained.

At the workshop, when assembling the connection between the tundish nozzle 1a of the tundish 1 and the mold 2, the head bar 21 is inserted into the mold 2 leaving the rear end intact, and the mold 2 around the dummy bar head 10 at the tip of the head bar 21 is inserted. Seal the entrance.

Tandaishi 1 assembled as above
and the mold 2 are carried to a casting line and installed on a tundish stand 3 and a mold stand 4. Next, attach the connecting bar 22 to the dummy bar body 7, move the dummy bar body 7 to the mold 2 side, and insert the connecting pin 23 attached to the front end of the connecting bar 22 into the connecting pin insertion opening 3 of the head bar 21.
2, and then move the clasp 33 from the clasp locking hole 33 of the head bar 21 to the clasp locking hole 2 of the connecting pin 23.
3b, and connect the connecting pin 23 to the head bar 2.
1 side and fix it, and connect the head bar 21 and the connecting bar 22 as shown in FIG.

The distance between the head bar axis A and the connecting bar axis B is d.
FIG. 3 shows a case where the position is shifted in parallel by . In this case, the first spherical seat 23c of the connecting pin 23 slides on the first spherical seat 25b of the first receiving member 25, and the connecting pin 23 is inclined with respect to the connecting bar axis B. In accordance with the displacement of the connecting pin main body 23a due to the inclination, the intermediate member 28 and the second receiving member 29 slide in parallel between the front surface of the locking member 26 and the rear end surface 21a of the head bar 21 and are displaced. When d is large, the first receiving member 25 is connected to the locking member 2.
It is displaced by sliding on the back surface of 6.

Next, FIG. 4 shows a case where the connecting bar axis B intersects the head bar axis A at an angle of α°. In this case, the first spherical seat 23c of the connecting pin 23 slides on the first spherical seat 25b of the first receiving member 25, and the connecting pin 23 is tilted with respect to the connecting bar axis B. , the first receiving member 25 slides on the back surface of the locking member 26. Furthermore, as the connecting pin body 23 is displaced, the intermediate member 28 and the second receiving member 29 are slid and displaced between the front surface of the locking member 26 and the rear end surface 21a of the head bar 21, and The second spherical seat 29b of the second receiving member 29 slides on the second spherical seat 28b of the intermediate member 28 to absorb the inclination of the front surface of the locking member 26 with respect to the rear end surface 21a of the head bar 21. , the connecting bar axis B is fixed while allowing the inclination of the connecting bar axis B with respect to the head bar axis A.

Effects of the Invention As described above, the present invention connects a connection bar between the head bar and the dummy bar body, and connects the connection pin with the locking member via the first receiving member at the connection between the connection bar and the head bar. The rear end flange is swingably locked, the rear end of the connecting pin is attached to the connecting bar, and a second spherical seat and a second spherical catch are installed between the front surface of the locking member and the back of the head bar. An intermediate member and a second receiving member each having an intermediate member and a second receiving member are slidably interposed so that a connecting pin passes through each axis, and the tip of the connecting pin is inserted into a connecting pin insertion hole at the rear end of the head bar. Since the connecting pin is attracted and fixed to the head bar side by the kotsuta, even if the axis of the head bar inserted into the mold and the connecting bar are misaligned or tilted, a reliable and strong connection can be achieved. Even if pushback is applied when the dummy bar is moved, no looseness will occur at the connection part. Additionally, when assembling the tundish and mold in the workshop, it is possible to insert a head bar and seal the dummy bar head at the tip of the head bar and the inside of the mold, which saves time compared to sealing work on a conventional casting line. Furthermore, damage to the mold that occurs when inserting a head bar in a conventional casting line does not occur.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, in which FIG. 1 is a side cross-sectional view showing the connecting portion between the head bar and the connecting bar, FIG. 2 is an overall side view, and FIGS.
Each figure is a plan sectional view of the above-mentioned connection part to explain the function thereof, and FIG. 5 is an overall side view showing a conventional example. 2...Mold, 5...Horizontal guide roller, 6
... Vertical guide roller, 7 ... Dummy bar body,
DESCRIPTION OF SYMBOLS 10... Dummy bar head, 21... Head bar, 21a... Rear end surface of head bar, 22... Connection bar, 23... Connecting pin, 23b... Hole for socket, 23... First spherical seat, 23d... Tsuba Part, 2
5...First receiving member, 25a...Through hole, 25b
...First spherical catch, 26...Locking member, 26a
...Through hole, 28...Intermediate member, 28a...Through hole, 28...Second spherical seat, 29...Second receiving member, 29a...Through hole, 29b...Second spherical seat, 32... Connecting pin insertion hole, 33... Hole for locking the bolt, 34... Locker, A... Head bar axis, B... Connection bar axis, A... Connection portion.

Claims (1)

[Scope of utility model registration request] The head bar 21 is removably inserted into the mold 2 and has the dummy bar head 10 at the front end, and the connecting bar 22 is connected between the dummy bar body 7 that moves guided by guide rollers 5 and 6. At the connection part A between the head bar 21 and the connection bar 22, there is a hole 2 for a bolt at the front end of the head bar 21 side.
3b and a flange portion 23d having a convex first spherical seat 23c formed on the front surface at the rear end portion on the connection bar 22 side, and the connecting pin 23 passes through the shaft center portion. Above 1st on the back
a first receiving member 25 having a first spherical seat 25b that slidably engages with a spherical seat 23c;
a locking member 26 that is fixed to and supports the front surface of the first receiving member 25, and a second spherical seat 28b that has a convex front surface and has a connecting pin 23 passing through its axial center.
an intermediate member 28 having a back surface supported by the locking member 26;
passes through it, and the second spherical seat 28 is formed on the back surface.
A second spherical seat 29b is formed, and the front surface thereof is connected to the rear end surface 21 of the head bar 21.
The second receiving member 29 supported by a, the locking hole 23b of the connecting pin 23 inserted into the connecting pin insertion hole 32 formed at the rear end of the head bar 21, and the connecting pin locking hole 23b formed in the head cover 21. A dummy bar connection structure for horizontal continuous casting equipment, characterized in that the dummy bar connection structure includes a holder 34 that is fitted across the hole 33 and connects the connection pin 23 to the head bar 21.