KR19990037510A - Slab sizing press - Google Patents

Abstract

An object of the present invention is to simplify the structure while ensuring the mechanical stability of the slab sizing press.

In the present invention, the oscillating motion caused by the rotation of two opposing crankshafts is transmitted to the two opposing first blocks arranged inside the two crankshafts, and at least one arm is provided with respect to one of the crankshafts. It is provided to rotate freely, and the arm end is contacted with the said 1st block, at least one of the contact surface is made into a cylindrical surface or a spherical surface, and the other is made into a plane, and the said 1st block is the outer crankshaft Install a balancing device to pull in the direction.

According to the present invention, the structure can be simplified while ensuring the stability of the mechanism.

Description

Slab sizing press

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a width reduction apparatus for hot slabs, and more particularly to a slab sizing press that presses down a slab side by swinging due to rotation of an opposing crankshaft.

In the conventional slab sizing press, a method of connecting the crankshaft and the outer block with a connecting rod having bearings at both ends as a means for transmitting the rocking motion caused by the rotation of the crankshaft to the outer block. -50807 or Fig. 3) or a method of connecting with a connecting rod having a bearing on the crankshaft side and an outer block side of a male and female spherical surface (pitman) (Japanese Patent Laid-Open No. 5-123701, 4) has been put into practical use.

In either method, a balancing mechanism for pulling the outer block toward the crankshaft to correct rattling and a width adjusting mechanism for initial positioning of the inner block with respect to the slab width are required.

As the width adjusting mechanism, in the technique described in Japanese Patent Application Laid-Open No. 2-50807, eight screws and nuts are provided in four whole entrance top and bottom (entrance side, exit side, top side, bottom side), and Japanese Patent Laid-Open No. 5 In the technique described in -123701, two screws and nuts are provided as a whole.

As commonly requested by industrial machinery in general, even in a slab sizing press installation, it is requested that the installation cost be low, the simple structure, and the maintenance property be good. In a slab sizing press, a slab side is pressed using a mold having a parallel portion and a tapered portion to obtain a desired slab width. At this time, in order to prevent buckling or to control the slab planar shape, slab end preforming or rear end preforming is performed or backfeed press is performed in relation to the front and rear equipment.

Due to such a mold shape and various operations, the center of the press load in the slab sizing press is not constant, and in particular, a large change in the entry and exit direction is a factor that impairs the stability of the mechanism or complicates the structure.

The slab sizing press disclosed in Japanese Patent Application Laid-Open No. 2-50807 has bearings at both ends of four connecting rods with two entrances and exits, and eight screws with four entry and exit tops and bottoms as width adjusting mechanisms. The nut is provided, and the stability of the mechanism against the change of the press load point is high, but the structure is complicated, so the equipment cost is high and the water retention is bad.

In addition, the slab sizing press described in Japanese Patent Laid-Open No. 5-123701 has two connecting rods each, and the outer block side has a male and female spherical surface (pitman), and the width is adjusted. As a mechanism, two screws and nuts are provided as a whole, and a crank mechanism and a width adjustment mechanism are simple. However, the stability of the mechanism with respect to the change of the press load point is low, and a rotation moment is generated by the displacement of the load point in the inner block and the outer block. For this reason, a guide mechanism sufficient to withstand the rotation moment is required around the outer block, and the water retention of this guide mechanism is poor.

In view of the above problems, a slab sizing press having a low facility cost and good maintainability is required to achieve both high stability and simple structure.

An object of the present invention is to obtain both the stability of the slab sizing press mechanism and the simplification of the structure.

1 is a plan view of an embodiment of the present invention,

2 is a side view of an embodiment of the present invention;

Fig. 3 is a view showing Japanese Patent Application Laid-Open No. 2-50807, which is a conventional embodiment, provided with eight screws and nuts in all four of the upper and lower four entrances and exits as the width adjustment mechanism;

Fig. 4 is a view showing Japanese Patent Application Laid-open No. Hei 5-123701, which is a conventional embodiment, having two screws and nuts as a whole as a width adjusting mechanism;

FIG. 5 is a view showing that the screw of the width adjusting mechanism is changed from eight to four in and out of four in and out of four in and out of two in and out of two in and out of the conventional embodiment of FIG.

6 is a diagram showing the load distribution of the inlet and outlet in a 1/10 model tester of a slab sizing press having eight screws and nuts in all four upper and lower positions;

FIG. 7 is a diagram showing load distribution up and down in a 1/10 model tester of a slab sizing press equipped with eight screws and nuts in all four up and down entrances and exits. FIG.

8 is a view showing the electric contact configuration of the present invention.

※ Explanation of code for main part of drawing

1 housing 2 crankshaft

3: arm 4: bearing for crankshaft

5: bearing for arm 6: flat plate

7: Rocker plate 8: Crankshaft drive motor

9: outer block 10: screw

11: nut 12: worm shaft drive motor

13: inner block 14: mold

15: outer block balance cylinder 16: inner block balance cylinder

17: worm shaft 18: pinch roller

19: pinch roller drive motor 20: slab

21: stopper 22, 23: sector gear

24: load cell 30: rolling element member

31: sliding surface member 32: play

The slab sizing press of the present invention, in the slab sizing press for transmitting the rocking motion by the rotation of the two opposing crankshaft to the two opposing first blocks disposed inside the two crankshaft to press the side of the slab At least one arm is rotatably provided with respect to one crankshaft, and the end of the arm is brought into contact with the first block so that at least one of the contact surfaces is a cylindrical surface or a spherical surface, and the other is a flat surface. And a balancing device that pulls the first block in the crankshaft direction of the outer side thereof.

The slab sizing press of the present invention, in the slab sizing press that presses the side of the slab, an eccentric crankshaft for transmitting the width-load load, an arm rotatably installed on the eccentric crankshaft, and the arm and the electric transmission A pair of a 1st block which contacts, a 2nd block provided so that the said 1st block and space | interval can be adjusted, and a metal mold | die provided in the said 2nd block are provided, respectively, and also the space | interval of said 1st block and 2nd block It characterized in that the two interval adjusting means for adjusting the installed in the slab conveying direction.

In the present invention, the change in the center of the press load is small in the vertical direction and large in the entry and exit direction (slab transport direction). Although equipped with a screw and a nut, it is possible to simplify the structure without damaging the stability as a total of two in and out of two.

Here, FIG. 6 and FIG. 7 show the loading and unloading load distribution in the 1/10 model tester of the slab sizing press equipped with eight screws and nuts in all four upper and lower positions.

In Fig. 6, the shared load of the inlet screw is plotted on the horizontal axis, and the shared load of the outlet screw is plotted on the longitudinal axis. If the inlet and outlet loads are equal, the points are plotted on a straight line so that the center of press load coincides with the center of the press plant. The point of FIG. 6 has shift | deviated from a straight line and has spread | diffusion, and it turns out that the press load center changes in the entry / exit direction.

On the other hand, in Fig. 7, it is understood that the shared load of the upper screw is plotted on the horizontal axis, and the shared screw of the lower screw is plotted on the vertical axis, and the points are in a straight line, and the center of press load hardly changes in the vertical direction.

In the slab sizing press of Japanese Patent Application Laid-Open No. 2-50807, four screws and nuts are mounted on the outer block, and the press load is transmitted in the order of screw and nut, outer block, connecting rod, crankshaft and housing. Doing. At this time, a study has been made in which the end of the connecting rod is inserted between the upper and lower screws and nuts so that the entire length of the installation is not lengthened.

Also in this invention, although the transmission path of a press load is substantially the same, since the screw and nut are two in and out, the study by the arrangement like Japanese Unexamined-Japanese-Patent No. 2-50807 cannot be performed.

In addition, a method of shortening the length of the facility by shifting the position of the screw and nut from the position of the connecting rod in the entry / exit direction (slab conveying direction) can be considered. You lose.

Thus, as another study to shorten the overall length of the installation, the connecting rod and the outer side are focused on the fact that the swinging angle of the connecting rod is small, and that there is a balancing mechanism that pulls the outer block toward the crankshaft to correct the rattling. The structure is also simplified by adopting a method of transmitting a load by rolling contact with a rolling element (cylindrical or spherical surface) at the end of the arm without a connection by a bearing of the block.

Moreover, as a means for electrically contacting an arm and an outer block, a rolling element is provided in one side of the contact part of an arm and an outer block, and the sliding surface which slides with a rolling element is provided in another. At this time, you may make electric contact with both contact parts as a rolling element.

As the rolling element, various ones can be applied, but for example, as shown in Figs. 8 (a) and 8 (b), the rolling element member for rolling with a cylindrical surface, a cylindrical surface, a spherical surface, or the like can be used. (30) is mentioned. That is, it is provided with the curved surface which can be electrically contacted.

In addition, although the sliding surface which slides with a rolling element is a sliding surface member 31, such as a flat plate shape as shown to Fig.8 (a), it is permissible to the shape of the rolling element which contacts this sliding surface. It is good also as a curved surface shape as a range to make. For example, as shown in FIG. 8 (c), the allowable range is maintained in the state of electric contact when either the rolling element member 30 and the sliding surface member 31 are inclined in the vertical direction. It means a play (32) as much as possible. That is, as shown in FIG.8 (d), the curvature of a sliding surface shape may be made larger than the circular curvature of the rolling element 30, and the play 32 may be formed.

In the method of transmitting the load by the cylindrical contact of the rolling elements or the spherical surface and the plane which is the sliding surface, there is a concern that the electric contact point is shifted and the rocking motion due to the rotation of the crankshaft cannot be performed accurately.

In order to perform the rocking motion by the rotation of this crankshaft correctly, it is preferable to provide a shift prevention means. As this misalignment prevention means, a sector gear, a stopper, a pin, an elastic body (spring etc.), etc. are mentioned.

In addition, when a sector gear, a stopper, a pin, etc. are used as a misalignment prevention means, the balance force which pulls an outer block toward a crankshaft at the time of maintenance of a facility is lost, and the engagement of a sector gear, a pin, or a stopper is disengaged. I'm concerned. Therefore, you may provide a stopper so that a contact surface may not become far beyond the engagement depth (engagement length) of a sector gear, a pin, or a stopper.

(Example)

Embodiments of the present invention will be described with reference to Figs.

1 shows a plan view of a slab sizing press that is an embodiment of the invention, and FIG. 2 shows a side view of a slab sizing press that is an embodiment of the invention.

The slab sizing press is mainly provided with slab width reduction means, slab width adjustment means and slab conveying means.

The slab width reduction that vibrates the mold 14 in the width direction of the slab is performed by the crankshaft 2 which is mainly an eccentric crankshaft. This crankshaft 2 is rotatably held by the crankshaft bearing 4 at both ends of the window of the housing 1, and is rotated by the crankshaft drive motor 8. In the crankshaft 2, two arms 3 are rotatably provided by the bearing 5 for arms in the entry / exit direction (slab transport direction).

At the end of the arm 3, the flat plate 6 was provided as a sliding surface in the present Example. Moreover, the sector gear 22 was provided as this misalignment prevention means. By this flat plate 6, the press load can be transmitted from the outer block 9 by electric contact.

At the rear end of the outer block 9, a rocker plate 7 which is a cylindrical rolling element is provided, and a sector gear 23 is provided as this misalignment preventing means. The rocker plate 7 is in contact with the flat plate 6 with some clearance in the vertical direction.

That is, by the electric contact of this rocker plate 7 and the flat plate 6, the press load from the crankshaft 2 which is an eccentric crankshaft can be transmitted to the outer block 9 via the arm 3.

As described above, since the press force is transmitted by the electric contact between the flat plate 6 and the rocker plate 7, no conventional connecting rod or the like is required, so that the installation structure can be simplified and the installation length can be reduced. .

At this time, the arrangement of the flat plate 6 on the arm 3 side and the rocker plate 7 on the outer block 9 side may be reversed. That is, what is necessary is just to perform by electric contact, when transmitting the press load from the crankshaft 2 to the outer block 9 via the arm 3.

In addition, the sector gear 22 and the sector gear 23 may use a stopper, a pin or a spring which is an elastic body, etc., in which the effect of preventing displacement can be used.

In addition, the press load transmitted to the outer block 9 is transmitted to the mold 14 via the screw 10 and the inner block 13, and the slab 20 is received by the mold 14 receiving the press load. The width is reduced. That is, the work required for pressing is given by the rocking motion by the rotation of the crankshaft 2, whereby the mold 14 presses the side surface of the slab 20 to reduce the slab width.

In addition, in the facility which vibrates the mold 14 in the slab width direction and provides a means for moving the mold 14 in the slab conveyance direction, the equipment 14 moves in the circular orbital or circular arc orbit. One electric contact mechanism can be applied.

Next, slab width adjustment for obtaining a slab of a desired width is performed by changing the distance between the inner block 13 and the outer block 9. In this width adjusting mechanism, the outer block 9 is provided with a screw 10 and a nut 11. In this embodiment, the screw 10 and the nut 11 are provided in two sets in the entry / exit direction (slab conveyance direction), so that the load center is positioned between the two screws 10 even if the press load center changes in the entry / exit direction. It is supposed to be. And, as shown in Fig. 2, the axial heights of the two screws 10 are arranged at approximately the same height as the center height of the slab 20 so that the load can be transmitted to the slab 20 stably in the vertical direction. have.

In addition, in this embodiment, the nut 11 is rotated by the worm shaft 17, and the screw 10 is pushed out. The worm shaft 17 is driven by the motor 12. The end of the screw 10 is in contact with the back of the inner block 13 to transmit the press load. Inside the inner block 13, a mold 14 having a parallel portion and a tapered portion is provided.

In this manner, by the rotation of the motor 12, the screw 10 is pushed out by using the nut 11 and the worm shaft 17. By this operation, slab width adjustment can be performed by changing the distance between the inner block 13 and the outer block 9. Then, by installing two sets of screws 10, which are means for adjusting the distance between the inner block 13 and the outer block 9, in the slab entry / exit direction (slab transport direction), the number of parts is reduced compared to the conventional four sets. This can simplify the structure and improve water retention. Further, the means for adjusting the distance between the two sets of inner blocks 13 and outer blocks 9 is disposed at approximately the same height as the height of the slab 20 in the vertical direction (height direction), so that the load can be stably I can deliver it.

Next, slab conveyance is performed by the pinch roller 18 provided in the entrance and exit. By the motor 19, the pinch rollers 18 of the inlet side and the outlet side are rotated to give the required amount of conveyance, and the slab 20 pressed once is conveyed.

In this embodiment, the following shock load suppressing means is provided.

Since there is a gap or rattling in the path for transferring the press load from the mold 14 to the housing 1, an impact load occurs, so in this embodiment, the rattling between the inner block 13 and the outer block 9 is made. The inner block balance cylinder 16 which eliminates a shake is provided, and the outer block balance cylinder 15 which removes the rattling between the outer block 9 and the housing 1 is provided.

Here, the inner block balance cylinder 16 eliminates rattling of the drive system of the width adjusting mechanism, and the outer block balance cylinder 15 also has an effect of eliminating rattling of the drive system of the crankshaft 2.

In this embodiment, the load cell 24 is provided between the outer block 9 and the rocker plate 7 in order to detect the press load. By this load cell 24, the press load actually acting can be detected correctly. In addition, the position of a load cell may be anywhere between the housing 1 and the metal mold | die 14.

According to this embodiment, the following effects are obtained.

The bearing is not connected between the outer block and the connecting rod, but by the electric contact between the plate and the rocker plate, thereby simplifying the structure and reducing the length of the installation.

In addition, the width adjustment screw and the nut can be divided into two input and output four upper and lower input and output two to simplify the structure and reduce the equipment cost.

Moreover, by making one screw and the nut for width adjustment into two, the stability of a machine with respect to a change of a press load center can be ensured. By securing the stability of the machine, since the rotation moment acting on the inner block and the outer block is prevented, the guide mechanism for the rotation moment can be unnecessary or simplified.

In addition, by setting two arms between the crankshaft and the outer block in and out (inlet and outlet, in the slab conveying direction), the stability of the machine to the change in the center of the press load can be further improved.

In addition, by preventing the shift of the electric contact portion between the plate and the rocker plate with a sector gear or the like, and providing the prevention of the falling out of the sector gear or the like, the reproducibility and accuracy of the rocking motion caused by the crankshaft can be ensured and the operation stability is improved. You can.

According to the present invention, the structure can be simplified while ensuring the stability of the slab sizing press mechanism.

Claims (9)

A slab sizing press having a width reduction means having an eccentric crankshaft, The width reduction means described above, An arm rotatably installed on the eccentric crankshaft described above; A slab sizing press, comprising: a first block in electrical contact with the arm, a second block provided so as to be spaced apart from the first block, and a mold provided in the second block. In the slab sizing press for reducing the slab width, An eccentric crankshaft for transmitting a width reduction load, an arm rotatably installed on the eccentric crankshaft, a first block in contact with the arm, and a front end provided in one of the contact portions of the arm and the first block. A slab sizing press, comprising: a body, a sliding surface member provided on the other side of the contact portion, a second block provided so as to be spaced apart from the first block, and a mold provided in the second block. In the slab sizing press for reducing the slab width, An eccentric crankshaft for transmitting a width reduction load, an arm rotatably installed on the eccentric crankshaft, a first block in contact with the arm, and a former provided in both the contact portion of the arm and the first block. A slab sizing press, comprising: a body, a second block provided to be spaced apart from the first block, and a mold provided to the second block. In the slab sizing press for transmitting the rocking motion by the rotation of the two opposing crankshaft to the two opposing first blocks disposed inside of the two crankshaft to press the side of the slab, At least one arm is rotatably installed with respect to one crankshaft, and the end of the arm is brought into contact with the first block so that one side of the contact surface is a cylindrical surface or a spherical surface and the other side is a flat or cylindrical surface or a spherical surface. At the same time, the slab sizing press characterized in that a balancing device for pulling the first block in the crankshaft direction of the outer side is provided. The method of claim 4, wherein A slab sizing press, comprising: a means for preventing misalignment due to sliding of the arm end and the contact surface of the block, wherein the means is any one of a sector gear, a pin, a stopper, and an elastic body. The method of claim 5, At the same time, further installing two opposing second blocks inside the first block, and at least one screw and nut for adjusting the distance between the second block and the first block, A slab sizing press, wherein the slab is pressed with a second block. The method of claim 6, A slab sizing press comprising two screws and nuts between the first block and the second block at a slab flow direction inlet and outlet. The method of claim 7, wherein A slab sizing press comprising two arms at a slab flow direction entrance and exit. The method of claim 5, A slab sizing press, characterized in that a stopper is provided so that the contact surface does not go far beyond the insertion length that is the engagement depth of the sector gear or the pin or stopper.