JP2807302B2 - Hot slab width pressing device and hot slab width reducing method - Google Patents

Description

The present invention relates to a hot slab width press for reducing a width by applying a compressive force in a width direction while transferring a long plate-shaped hot slab in a longitudinal direction. Related to the device.

[Conventional technology]

A conventional hot slab width press is disclosed in, for example,
As described in Japanese Patent No. 245931, a housing, a bearing box fixed to the housing, a crankshaft rotatably supported by the bearing box, a slider and a mold holding block reciprocally mounted on the housing, a crankshaft Arm including a crank arm (con-rod) for converting the rotation of the crankshaft into reciprocating motion of the slider, and a width adjusting screw for connecting the mold holding block and the slider so that the distance between them can be adjusted. Has become.

[Problems to be solved by the invention]

However, the conventional device has many components and a complicated structure, so that the size of the device is large, the equipment cost is high, the disassembly and assembly are not easy, and the maintainability is poor.

An object of the present invention is to provide a compact hot slab width press device which has a simple structure, is easy to maintain, and has a reduced number of components while securing a width reduction function required for the press device.

[Means for solving the problem]

In order to achieve the above object, a first feature of the present invention is a hot slab width press device for applying a compressive force in a width direction while transferring a long plate-shaped hot slab in a longitudinal direction to reduce the width. A housing, bearing means held by the housing, a crankshaft rotatably supported by the bearing means, and a mold holding block equipped with a press mold reciprocally mounted on the housing. A sleeve means rotatably mounted on the crankshaft and having a cylindrical surface in contact with the mold holding block; and urging the mold holding block toward the sleeve means to form the mold holding block and the cylindrical surface. And a first urging means for maintaining the contact state with the first urging means.

Further, a second feature of the present invention is that a width adjusting means mounted on the housing and supporting the bearing means for setting a slab width, and the bearing means is biased toward the width adjusting means to adjust the width. Second to ensure the support of the bearing means by means
And an urging means.

Preferably, the sleeve means is rotatably mounted on a central crank part of the crankshaft, and the bearing means rotatably supports both shaft parts of the crankshaft.

The sleeve means may be rotatably mounted on both shaft parts of the crankshaft, and the bearing means may rotatably support a central crank part of the crankshaft.

According to the present invention, in order to achieve the above object, a compressive force is applied in the width direction of the hot slab by a reciprocating motion of a pair of dies while transferring the hot slab in the longitudinal direction. In a method for reducing the width of a hot slab, the cylindrical sleeve rotatably mounted on the crank portion is eccentrically rotated by rotating a crankshaft provided with the crank portion, and While pressing the mold holding block to be held against the cylindrical sleeve, the mold holding block is reciprocated by the eccentric rotation of the cylindrical sleeve, and the reciprocating movement of the mold causes a compression force in the width direction of the hot slab. In addition, there is provided a method for reducing the width of the hot slab.

[Action]

In the first aspect of the present invention configured as described above,
The sleeve means is also eccentrically rotated by the eccentric rotation of the crankshaft. At this time, the contact state between the cylindrical surface of the sleeve means and the mold holding block is maintained by the first urging means. The eccentric rotation directly pushes the mold holding block, whereby the mold holding block reciprocates. Also, at this time, since the sleeve means is rotatably supported by the bearing means with respect to the crankshaft, the sleeve means does not rotate with respect to the mold holding block, but the mold holding block according to the eccentric rotation of the crankshaft. Just roll over a certain angle range while pressing. Therefore, when the sleeve means pushes the mold holding block, no lateral force is applied to the mold holding block to tilt the mold holding block, and the mold holding block always keeps the mounted mold on the hot slab. It reciprocates so that it hits vertically. Thereby, the width reduction function required for the press device is secured.

In addition, the crankshaft and the mold holding block have a structure in which the sleeve means mounted on the crankshaft only pushes the mold holding block, so that the conventional crank arm (connecting rod) is unnecessary, and the number of components is reduced. The structure is simplified and compact. Further, since the mold holding block can be easily separated from the crankshaft, it can be easily taken out of the apparatus, and the maintainability is improved.

In the second aspect of the present invention, the position of the bearing means is changed by adjusting the width adjusting means, the position of the crankshaft is changed correspondingly, and further, the position of the mold holding block is changed. Can be set. This eliminates the need for a conventional slider, further reduces the number of components, and further simplifies and compacts the structure. Further, since the width adjusting means has a structure only to support the bearing means, the bearing means can be easily separated from the width adjusting means. On the other hand, as described above, the crankshaft has a structure that only pushes the mold holding block via the sleeve means. Therefore, it is easy to take out the crankshaft and the bearing means out of the apparatus as a unit, and it is easy to take out the mold holding block out of the apparatus.
The maintainability is further improved.

The power transmission to the crankshaft, whose position is changed by the adjustment of the width adjusting means, can be easily performed by connecting the crankshaft to a power source via a universal joint.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

1 and 2, reference numeral 1 denotes a power source, and the power source 1 is connected to a crankshaft 3 via a universal joint 2. The crankshaft 3 has a crank portion 3A that rotates eccentrically with respect to the crankshaft center, and a cylindrical sleeve 5 is mounted on the crank portion 3A via a bearing 4. The outer cylindrical surface of the cylindrical sleeve 5 is in contact with a protrusion 7A of a mold holding block 7 on which a mold 6 is mounted, and the mold holding block 7 is housed by roller type guide devices 8A and 8B provided at both ends. The inner surface 9 and the upper surface 9 are engaged with each other, and are supported by the housing 9 so as to be able to reciprocate.

On the other hand, the shaft portions 3B at both ends of the crankshaft 3 are rotatably supported by bearings 11 mounted on a bearing box 10, and
Is supported via a thrust bearing 13 at the tip of a width adjusting screw 12 screwed to the housing 9. The thrust bearing 13 is fixed to the bearing housing 10.

The upper and lower parts between the bearing box 10 and each end of the mold holding block 7
A pair of tension springs 14 are provided, and the mold holding block 7 is urged toward the cylindrical sleeve 5 by the tension springs 14 so that the protrusion 7A of the mold holding block 7 contacts the cylindrical surface of the cylindrical sleeve 5. State is maintained. Also, a pair of upper and lower tension springs 15 are disposed between the bearing box 10 and the portion of the housing 9 adjacent to each width adjusting screw 12, and the bearing spring 10 is moved by the tension springs 15 toward the tip of the width adjusting screw 12. Energized to ensure that the width adjustment screw 12 supports the bearing housing 10.

Power is transmitted to the crankshaft 3 from the power source 1 via the universal joint 2, and the crank portion 3A rotates eccentrically with respect to the crankshaft center. The eccentric rotation of the crank portion 3A also causes the cylindrical sleeve 5 to eccentrically rotate. At this time, the contact surface between the cylindrical surface of the cylindrical sleeve 5 and the protrusion 7A of the mold holding block 7 is held by the tension spring 14.
For this reason, the eccentric rotation of the cylindrical sleeve 5 directly pushes the projection 7A of the mold holding block, whereby the mold holding block 7
Reciprocates on the housing 9. At this time, since the cylindrical sleeve 5 is rotatably supported by the bearing 4 with respect to the crank portion 3A, the cylindrical sleeve 5 does not rotate with respect to the mold holding block 7 but responds to the eccentric rotation of the crank portion 3A. It only rolls in a certain angle range while pressing the protrusion 7A of the mold holding block 7. For this reason, the cylindrical sleeve 5
When the user pushes the protrusion 7A of the mold holding block 7, no lateral force is exerted on the mold holding block 7 to tilt it, and the mold holding block 7 always keeps the mounted mold 6 hot. It reciprocates so as to hit the slab 16 vertically. Thereby, the width reduction function required for the press device is secured.

Further, the crank bearing box 10 is supported at an arbitrary distance from the housing 9 by the width adjusting screw 12, and the position of the crank adjusting box 12 is changed by adjusting the width adjusting screw 12, so that the position of the crank portion 3A of the crankshaft 3 is changed. As a result, the position is changed to the reciprocating position of the mold holding block 7 and the mold 6, so that the press width can be set arbitrarily and it is possible to cope with the pressure reduction of the conveyed hot slab 16 having an arbitrary plate width.

In the present embodiment configured as described above, the crankshaft 3 and the mold holding block 7 have a structure in which the cylindrical sleeve 5 only pushes the mold holding block 7, and thus, conventionally, the eccentric rotation of the crankshaft is held by the mold holding block. The crank arm (connecting rod) used to convert the reciprocating motion of the block becomes unnecessary. Also, a width adjusting screw attached to the housing 9
Since the press width is set by changing the position of the bearing housing 10 by adjusting 12, the slider conventionally used for changing the press width by the width adjusting screw becomes unnecessary. Therefore, the number of components is reduced as compared with the conventional apparatus, and the structure is simplified and compact.

Also, since the cylindrical sleeve 5 has a structure that only pushes the mold holding block 7 and the bearing box 10 has a structure that is only supported by the width adjusting screw 12, the tension shafts 14 and 15 are removed to remove the crankshaft 3, The bearing housing 10 and the cylindrical sleeve 5 can be easily separated from other components and can be moved axially and removed out of the device. Further, the mold holding block 7 on which the mold 6 is mounted can be easily removed to the outside. As described above, it is easy to take out these parts from the apparatus, so that the maintainability is greatly improved.

In addition, the material of the cylindrical sleeve 5 is subjected to induction hardening on the sleeve material for the reinforcing roll of the rolling mill and the surface,
A sleeve material having improved wear resistance can be used.

Further, instead of the tension springs 14, 15, other urging means such as a cylinder device may be used.

Several other embodiments of the present invention will be described with reference to FIGS. In these figures, a tension spring and the like are omitted for the sake of simplicity.

In the embodiment shown in FIG. 3, both shaft portions of the crankshaft 3 are provided.
Cylindrical sleeves 20 and 21 are arranged on 3B via bearings 11, respectively. The two cylinder sleeves 20 and 21 press the mold holding block 7, and a crank bearing box 22 is arranged on the crank part 3A. The bearing box 22 is configured to be supported by the tip of the width adjusting screw 12 via the thrust bearing 13. According to this embodiment, in addition to the effect of the above-described embodiment, there is an effect that the structure is further simplified because the width adjustment screw is one.

In the embodiment of FIG. 4, the crankshaft 23 is
And an eccentric sleeve 23B fitted on the straight shaft 23A. According to this embodiment, in addition to the effects of the above-described embodiment, there is an effect that the manufacture of the crankshaft is facilitated.

In the embodiment of FIG. 5, instead of the width adjusting screw 12 as a width adjusting means for supporting the bearing housing 22, a spacer is used.
A stepped rocker plate 25 for coarse adjustment supporting the bearing housing 22 through the stepped plate 24; a stepped rocker plate 25;
And a wedge 26 for fine adjustment inserted between them, and these stepped rocker plate 25 and wedge 26 are driven by cylinder devices 27 and 28, respectively.
According to this embodiment, in addition to the effects of the above-described embodiment, there is an effect that the structure can be made more compact as compared with the width adjusting means using a screw.

In the embodiment shown in FIG. 6, the bearing outer ring 29A of the bearing 29 mounted on both shaft portions of the crankshaft is also used as a cylindrical sleeve, and the mold holding block 7 is pushed by the bearing outer ring 29A. According to this embodiment, there is no need to arrange a special cylindrical sleeve, so that the structure is further simplified.

In the embodiment shown in FIG. 7, both shaft portions of the crankshaft 3 are provided.
The tapered roller bearing 30 is used as a bearing means for supporting 3B. When the hot slab 16 is reduced in width, not only the load in the width reduction direction, but also a load is generated mainly in the slab conveyance direction of the mold 6 due to the provision of the inclined surface on the entry side in the slab conveyance direction. According to the present embodiment, by using the tapered roller bearing 30, not only the load in the width reduction direction but also the load in the slab conveyance direction can be supported.

In the embodiment shown in FIG. 8, both shaft portions of the crankshaft 3 have a two-stage structure of a shaft portion 3C and a shaft portion 3D, a cylindrical roller bearing 31 is mounted on each shaft portion 3C, and a thrust bearing 32 is mounted on the shaft portion 3D. Is attached. According to this embodiment, it is possible to more reliably support the load in the slab conveyance direction as compared with the embodiment of FIG.

In the embodiment shown in FIG. 9, the sleeve means mounted on the crank portion 3A of the crankshaft 3 via the bearing 4 has a partially cylindrical shape corresponding to a portion to be loaded by contact with the mold holding block 7. This is a partial sleeve 33. According to this embodiment, there is an additional effect that expensive materials used for the sleeve 33 can be reduced.

In the embodiment of FIG. 10, a hydraulic cylinder 34 is used in place of the screw as the width adjusting means, and the position of the mold 6 is detected by a position detection sensor (not shown).
The press width can be similarly adjusted by the hydraulic cylinder 34.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, the number of components can be reduced, ensuring the width reduction function required for a press apparatus, and there exists an effect which can make an apparatus compact, without sacrificing a function. Further, in addition to the reduction in the number of components, the configuration is such that the crankshaft and the mold holding block only come into contact with the ends, so that the two can be easily separated, and the maintainability is improved. Further, since the bearing means of the crankshaft is configured to be supported by the width adjusting means, separation of the crankshaft and the housing is facilitated, and the maintainability is further improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional plan view of a hot slab width pressing apparatus according to an embodiment of the present invention, FIG. 2 is a partial cross-sectional front view thereof, and FIGS. It is a figure showing a hot slab width press device by other examples. DESCRIPTION OF SYMBOLS 3 ... Crank shaft 3A ... Crank part 3B ... Both shaft parts 4 ... Bearing 5 ... Cylinder sleeve (sleeve means) 6 ... Mold 7 ... Mould holding block 9 ... Housing 10 ... ... Bearing box 11 ... Bearing 12 ... Width adjusting screw 13 ... Thrust bearing 14 ... Tension spring (first biasing means) 15 ... Tension spring (second biasing means) 16 ... Hot slab

Claims (5)

(57) [Claims] 1. A hot slab width press device for applying a compressive force in a width direction while transferring a long plate-shaped hot slab in a longitudinal direction to reduce the width thereof, wherein the housing is held by the housing. Bearing means, a crankshaft rotatably supported by the bearing means, a mold holding block equipped with a press mold reciprocally mounted on the housing, and rotatably mounted on the crankshaft; And a sleeve means having a cylindrical surface in contact with the mold holding block; and a first means for urging the mold holding block toward the sleeve means to maintain a contact state between the mold holding block and the cylindrical surface. A hot slab width pressing device comprising: a biasing means. 2. A hot slab width pressing apparatus according to claim 1, further comprising: a width adjusting means mounted on said housing for setting a slab width for supporting said bearing means; and adjusting said bearing means to said width adjustment. And a second biasing means for biasing the bearing means by the width adjusting means to ensure that the bearing means is supported by the width adjusting means. 3. The hot slab width pressing apparatus according to claim 1, wherein said sleeve means is rotatably mounted on a central crank portion of said crankshaft, and said bearing means rotates both shaft portions of said crankshaft. A hot slab width press device characterized by being freely supported. 4. The hot slab width pressing device according to claim 1, wherein said sleeve means is rotatably mounted on both side shaft portions of said crankshaft, and said bearing means rotates a central crank portion of said crankshaft. A hot slab width press device characterized by being freely supported. 5. While transferring the hot slab in the longitudinal direction,
A method of applying a compressive force in the width direction of the hot slab by reciprocating motion of a pair of molds to reduce the width of the hot slab, wherein the crankshaft having the crank portion is rotated. The eccentric rotation of the cylindrical sleeve rotatably mounted on the crank portion thereby causes the eccentric rotation of the cylindrical sleeve while pressing the mold holding block for holding the mold against the cylindrical sleeve. Is reciprocated, and a compressive force is applied in the width direction of the hot slab by the reciprocating motion of the mold to reduce the width of the hot slab.