JPH0724902B2 - Slab sizing press - Google Patents

Description

TECHNICAL FIELD The present invention relates to a so-called slab sizing press that compresses a slab cast by a continuous casting facility in the width direction by a press.

[Conventional technology and its problems] Before applying a slab (a slab having a width wider than the thickness) continuously cast by a continuous casting facility to a rolling mill,
There is known a slab sizing press that reduces the slab width by compressing both widthwise end faces with a die having a pair of pressing faces while feeding in the longitudinal direction (for example, Japanese Patent Publication No. 59-101201). See the section of detailed description of the invention).

Such a slab sizing press is a mold supporting slide equipped with a pressing mold, a slang mechanism for reciprocating the slide, and a slide bottom dead center position by a wedge or a screw provided inside the slide. And an adjusting mechanism.

Therefore, the slab is temporarily stopped between the pressing dies opposed to each other, the pressing dies are pressed against each other, and the width direction of the slab is compressed.

The adjustment of the amount of compression is performed by stopping the press in advance by the slide bottom dead center position adjusting mechanism.

However, in such a slab sizing press,
Since the bottom dead center position of the slide (the closest position of the pair of molds) is constant during the press operation, the compression amount cannot be increased in order to prevent buckling of the slab due to compression. Therefore, the press operating rate is lowered and the temperature of the slab is lowered, which is not preferable. Moreover, although the slab width varies greatly depending on the steel type, if the slab width is significantly changed, it cannot be applied as it is unless the bottom dead center position of the slide is adjusted.

The press-type slab width reduction method proposed in the above publication reduces vibration by applying vibration to a press die having an inclined compression surface and continuously moving the slab between the die to reduce the slab width. However, even in that case, the amount of compression cannot be adjusted during the operation of the press because the amount of compression is adjusted in advance by the worm / worm wheel and the screw so that it has the same disadvantage.

[Means for Solving Problems] Therefore, the present invention was created in order to solve the problems in these conventional techniques, and it is possible to change the compression amount of the slab during the operation of the press and to achieve a large compression amount. It is intended to provide a sizing press capable of adjusting.

Hereinafter, the configuration of the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1 is a plan view of a sizing press which is an embodiment of the present invention, and FIG. 2 is an enlarged view of part A of FIG.

1 is a pressing die, and the tip surface of the die is a slab 2 (for example,
(Thickness 300 mm, length 10 m, width 1600 mm) has a slight inclined surface on the feed side. The mold 1 is fixed and supported on the tip of the first slide 3. The first slide 3 is connected to the second slide 4, and although the connecting portion is not shown in detail, a worm / worm wheel 5 is interposed and the length of the connecting portion is adjusted to adjust the compression amount. Can be adjusted in advance. The second slide 4 is connected to the srank shaft 7 via the connecting rod 6. Both ends of the crankshaft 7 are supported by a frame 8, and one end of the crankshaft 7 is connected to a main motor (motor) 10 via a speed reducer 9.
Is connected with. And the thing of the above structure is provided symmetrically across the passage of the slab 2.

Here, in this embodiment, both ends of the crankshaft 7 are supported by the frame 8 via eccentric sleeves 11, and as shown in FIG. Is formed, meshes with the pinion 13, and the pinion 13 is driven by the auxiliary motor (motor) 14. A universal joint 15 is connected between one end of the crankshaft 7 and the speed reducer 9, and a flywheel (not shown) may be interposed if necessary.

Since the present embodiment is configured as described above, it has the following effects.

The slab 2 cast by a continuous casting facility (not shown) is fed between the pressing dies 1, 1 placed opposite each other by a pinch roll (not shown).

By moving these molds 1 and 1 away from each other, the width direction of the slab 2 is compressed. At this time, the slide adjustment mechanism is adjusted by about 10 mm. First, set the worm / worm wheel 5 to a motor (motor) not shown.
Drive to adjust to a predetermined compression amount, then start the main motor 10, rotate the crankshaft 7, and reciprocate the first and second slides 3 and 4 via the connecting rod 6, The molds 1 and 1 come close to and away from each other, and compress the width direction of the slab 2 that is intermittently fed.

Here, the sizing press of the present embodiment is particularly used as follows. That is, when the slab 2 smaller than the compression amount preset by the worm / worm wheel 5 is fed, that is, when the slab 2 less than the closest distance t of the molds 1, 1 is fed. , The auxiliary motor 14 is driven, the eccentric sleeve 11 is slightly rotated, and the eccentricity e of the eccentric sleeve 11 determines the closest distance between the molds 1 and 1, for example, t-4.
The slab 2 is compressed to e and compressed in the width direction.

When a wide slab 2 is fed, the auxiliary motors 14 are intermittently driven to rotate the eccentric sleeve 11 when the mold 1 moves backward instead of compressing the molds 1 and 1 at once. However, the closest distance t is gradually reduced and repeatedly compressed (for example, a width of 1600 mm is compressed to 1250 mm) to a predetermined compression amount. Note that the slab 2 is stopped during this period.

In the present embodiment, the worm / worm wheel 5 is interposed between the first and second slides 3 and 4 so that the amount of compression can be adjusted, but the present invention is not limited to this, and the first and second slides can be used. Connect the connecting rod 6 directly to the slide 3,
The compression amount may be adjusted only by the eccentric sleeve 11.

In short, since the present invention has the structure described in the claims, it has the following effects.

[Advantages of the Invention] By adjusting (rotating) the bearing member (eccentric sleeve) of the crankshaft by means of the auxiliary prime mover, the slide bottom dead center position can be adjusted even during operation of the press, and it can be applied to slabs of various widths. Moreover, position adjustment is quick (for example, compared to the conventional worm / worm wheel only,
Since the eccentric sleeve of this embodiment can be adjusted at about twice the speed, the slab heated to a high temperature can be compressed in a high temperature state.

Since the bottom dead center position of the slide is adjusted by the bearing part of the crankshaft, it can withstand the high load of the press and, unlike the one built into the slide, it can be easily visually checked.
Maintainability is improved.

Furthermore, since the compression amount is adjusted by rotating the eccentric sleeve, the auxiliary prime mover for adjustment may be small in size.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is an enlarged view of part A of FIG. 1 …… Pressing die 2 …… Slab 3 …… First slide 7 …… Crankshaft 10 …… Main engine 11 …… Eccentric sleeve 14 …… Secondary engine

Claims (2)

[Claims] 1. A pair of slides supporting a press die, sandwiching a slab cast by a continuous casting facility, a crankshaft for reciprocating the slides, and a main engine driving the crankshaft. In a slab sizing press, bearing members that support both ends of a pair of these crankshafts are eccentric sleeves, and the sleeves are rotated so as to move closer to and away from the slab that is compressed by the auxiliary prime mover, thereby compressing in the slab width direction. A slab sizing press characterized by adjusting the amount. 2. The slab sizing press according to claim 1, wherein the auxiliary prime mover is interlocked with the main prime mover to perform compression while gradually increasing or decreasing the amount of compression.