JP2002102910A - Apparatus for positioning roll caliber in rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for positioning a roll caliber in the rolling mill capable of executing the positioning of the rolling roll accompanied by the caliber change in the rolling mill of the section steel with a simply constructional and inexpensive apparatus and also capable of aligning the caliber center with the pass line with high degree of accuracy. SOLUTION: A housing 2 provided freely rotatably with a rolling roll 3 with a plurality of caliber 3a through a roll chock 4 is located movably on the rail 6 by wheels 5 and then, the rail 6 is constituted freely moving up and down through elevating means 8 together with the housing 2 and a clamp liner 10 is integrally provided fixedly along the axial direction of the rolling roll 3 on the base plate 7, and a plurality of wedge-shaped recessed section 10a on the clamp liner 10 are provided in the position corresponding to the caliber 3a and the clamp mechanism 11 of the housing 2 against the clamp liner 10 is loaded on the housing 2 and the wedge-shaped abutting section 12a corresponding to the recessed section 10a of the clamp liner 10 is integrally installed on the clamp mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to changing the caliber of a calender-equipped rolling roll to be used in accordance with the wear of the rolling roll or the change in the cross-sectional shape of a product in a section steel rolling facility (hereinafter also referred to as a caliber change). ) Used to match the center of the caliber to the pass line
The present invention relates to a roll caliber positioning device for a rolling mill.

[0002]

2. Description of the Related Art There are many opportunities for caliber changes in rolling equipment for section steel in order to roll different types of section steel. In such a case, if the rolling roll is fixed at a fixed position and the pass line is bent by using a side guide or the like to perform rolling, there is a problem that the section steel meanders. Therefore, usually, a method is employed in which the rolling roll or the rolling mill is moved together with the housing in the axial direction of the rolling roll so that the center of the caliber is aligned on a straight path line.

As a prior art for carrying out such a method, there is an invention described in, for example, Japanese Patent Application Laid-Open No. H03-106506. According to the present invention, a point indicating a position at a fixed distance measured from the end face of the rolling roll incorporated in the housing toward the outside in the roll axis direction is graduated on the housing, and a preset center of the pass line is indicated on the base plate. From the reference point to the distance from the center of the roll caliber to the roll end face, add a fixed distance measured from the roll end face to the outside of the roll in the axial direction. The housing is moved and fixed to the base plate so that the points marked on the base plate coincide with each other. Further, in the present invention, the hydraulic cylinder is used for moving the housing. However, in some cases, a screw jack or the like may be used.

[0004]

However, the prior art described in the above-mentioned publication has room for improvement in the following points. In other words, it is not necessary to finely adjust the position of the rolling roll or the like by directly looking into the pass line, but the rolling mill (housing) can be moved with high precision (for example, & plu) by a moving device such as a hydraulic cylinder.
smn; within 1 mm). For this reason, a high-precision device is required for the moving device of the rolling mill, and equipment costs are increased.

[0005] In connection with the above, maintenance is complicated and time-consuming.

The fixing of the housing to the base plate is performed by lowering a clamp liner provided on the base plate with a rod tip of a hydraulic cylinder as a clamping mechanism so as not to cause slippage due to frictional force. When a directional force acts on the housing, the housing may move.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and enables the positioning of a rolling roll accompanying a caliber change in a section steel rolling facility to be performed with a simple and inexpensive apparatus, and to pass the center of the caliber with high accuracy. It is an object of the present invention to provide a positioning device for a roll caliber of a rolling mill that can match a line.

[0008]

In order to achieve the above object, a roll caliber positioning apparatus according to the present invention comprises: a) a roll having a plurality of calipers arranged rotatably and exchangeably via a roll chock; The installed housing is installed so as to be movable on a track by moving means such as wheels, and the track can be moved up and down with respect to the base plate through the elevating means together with the housing, and the housing is fixed to the base plate during rolling. And b) integrally fixing a clamp liner on the base plate along the axial direction of the rolling roll, and providing a plurality of wedge-shaped concave portions on the clamp liner at positions corresponding to the respective calipers, c) mounting a clamp mechanism of the housing to the clamp liner on the housing, d) the clamp mechanism Is characterized in that mounted integrally with wedge-shaped protrusions corresponding to the concave portion of the clamp liner.

According to the roll caliber positioning apparatus of the present invention having the above-described configuration, in order to move the rolling mill (housing) after a caliber change, etc.
Loosen the clamp mechanism of d) and pull out the wedge-shaped projection fitted in the concave portion of the clamp liner. As a result, the state of securing (clamping) of the housing to the base plate is eliminated. In this state, a part near the lower portion of the housing is grounded (placed) on the base plate, and the weight of the housing and the rolling roll acts on the base plate, so that the housing cannot be easily moved. Therefore, the housing is slightly lifted together with the track by the elevating means in b), so that the housing is separated from the base plate and becomes movable. The housing on the track is moved by the moving means so that the center of the target caliber on the roll comes to the shape steel pass line. At this point, the coarse adjustment is sufficient, does not require expensive and expensive moving means, and the moving operation is easy. The wedge-shaped protrusion is fitted into the concave portion of the clamp liner by tightening the clamp mechanism of d). The protrusion is guided by the wedge-shaped tapered surface and fits naturally into the concave portion, so that the position of the housing, that is, the center position of the caliber, is accurately aligned with the pass line. Is corrected. Further, unlike the conventional restraint using only frictional force, the housing is secured to the base plate by fitting the protrusion on the housing side to the concave portion of the clamp liner on the base plate side, so that the housing is more stable. And robust.

According to a second aspect of the present invention, e) the means for moving the housing includes wheels capable of traveling on the track and an electric motor for driving the wheels to rotate, and f) hydraulically controlling the elevating means. The wedge-shaped projection can be integrally attached to a metal tip of the cylinder as a cylinder and the clamping mechanism as a hydraulic cylinder for clamping.

According to the second aspect of the present invention, since the moving means is a wheel and an electric motor, and the clamp mechanism is a hydraulic cylinder, the movement of the housing can be easily performed by rotating the wheels (drive wheels) by the electric motor. In addition, it is possible to securely and firmly clamp by tightening with a hydraulic cylinder. In addition, the clamping mechanism is originally provided in the conventional device to fix the housing to the base plate, and a wedge-shaped projection is attached via a metal tip, and the clamping work and the mechanism are originally necessary. Therefore, the structure is not complicated as compared with the conventional apparatus, and the required work is hardly changed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a roll caliber positioning device in a rolling mill according to the present invention will be described below with reference to the drawings.

FIG. 1A is a front view showing a rolling mill for an edger according to an embodiment of the present invention (a view taken along the line AA in FIG. 2).
FIG. 1B is an enlarged front view showing a part (circle) of FIG. 1 and FIG. 2 is a right side view of the rolling mill of FIG. FIG. 3 is FIG.
FIG. 3 is an enlarged cross-sectional view taken along line BB of FIG.

The rolling mill 1 for an edger shown in FIGS. 1 and 2 constitutes a part of a line of a section steel rolling equipment provided with a universal rolling mill (not shown) in front thereof. The rolling mill 1 includes a housing 2 that forms a substantially square frame as viewed from the front as shown in FIG. 1, and a pair of upper and lower rolling rolls 3 is rotatable in the housing 2 via a roll chock 4. And are exchangeable. Each of the rolling rolls 3 includes a plurality of calipers 3 spaced apart in the axial direction.
a is formed.

A plurality of wheels 5 are rotatably mounted on the bottom of the housing 2 as shown in FIGS. 1 and 2, and the housing 2 is mounted so as to run on a pair of rails 6 as tracks. Have been. The rails 6 are arranged in the axial direction of the rolling roll 3, and each of the rails 6 is configured to be able to move up and down together with the housing 2 by a plurality of hydraulic cylinders (elevating means) 8 installed on a base plate 7. As shown in FIG. 2, an electric motor (drive device) 9 is connected to some of the wheels (drive wheels) 5, and by rotating the wheels 5 by the electric motor 9, the housing 2 moves on the rail 6. Moving. A motor with a pulse encoder, for example, is used as the electric motor 9 so that the moving distance of the housing 2 can be accurately grasped.

As shown in FIG. 2, projecting portions 2a are provided at the front and rear of the lower portion of the housing 2 so as to project outward.
In the state (a) in which a is pulled downward, the overhanging portions 2a are placed on the base plate 7 and are fixed by the weight of the housing 2 acting thereon. The edge 7a of the base plate 7 extends below the overhang 2a, and a clamp liner 10 is integrally attached to the lower surface of the edge 7a. On both sides of the clamp liner 10, a wedge-shaped (having a surface inclined inwardly and tapered inward) concave portion 10a corresponding to the position of the plurality of calipers 3a provided on the rolling roll 2
Are provided symmetrically at predetermined intervals. In this example, as shown in the enlarged view of FIG. 1B, the concave portion 10a is formed in a trapezoidal shape. Further, the inclination angles α of the tapered surfaces on both sides in the concave portion 10a are set to 15 ° to 20 °, respectively, but are not limited thereto.

On the other hand, each overhanging portion 2a
As shown in FIG. 2, a hydraulic cylinder for clamping (clamping mechanism) 11 is disposed on the inner side of the inside so that the piston rod 11a can be retracted downward. A tip metal (clamping block) 12 is integrally fixed to the tip (lower end) of each piston rod 11a, and a wedge-shaped projection 12a is integrally projected upward on the tip metal 12. However, the cross-sectional shape of these protrusions 12a corresponds to the hole (opening) shape of the concave portion 10a as shown in FIG. FIG. 3 is a sectional view showing another embodiment showing the above structure in more detail. As shown in FIG. 3, in this embodiment, a wheel 5 is rotatably mounted on the bottom of the housing 2 via a bearing 5a. A rail 6 on which the wheel 5 is mounted is integrally attached to an upper end of a piston rod 8a of a hydraulic cylinder 8 installed on a base plate 7 by a set screw 6b. On the other hand, just above the wheels 5, the hydraulic cylinder 11 is mounted on the lower part of the housing 2 with the center axis shifted from the piston rod 8a of the hydraulic cylinder 8 and the piston rod 11a protruding downward. On the upper surface of the upper portion 7c of the base plate 7, a liner 13 attached to the lower surface of the projecting portion 2a of the housing 2 with a set screw 14 is placed. Further, on the lower surface of a portion 7d protruding from the upper portion 7c toward the housing 2, the clamp liner 10 is
The metal fitting 12 having a projection 12a corresponding to the lower side of the clamp liner 10 is fixed to the lower end of the piston rod 11a by tightening it with a nut 11b. Piston rod 8a of hydraulic cylinder 8
Is a small stroke s ′ such that the protruding portion 2a of the housing 2 slightly rises from the upper surface of the upper portion 7c of the base plate 7, and the stroke s of the piston rod 11a of the hydraulic cylinder 11 for clamping is a slightly larger stroke. Need to be

As described above, a rolling mill provided with the roll caliber positioning device according to the present embodiment is configured.
The roll caliber positioning device is used as follows. That is, FIG. 1A shows a rolled state of the H-section steel, and the center position of the second caliber 3a from the right as viewed from the front coincides with the pass line of the H-section steel. In this state, the hydraulic cylinder 8 for raising and lowering the rail 6 is at a lower fixed position as shown in FIG. 2, and the hydraulic cylinder 11 for clamping pulls the piston rod 11a upward to form the wedge-shaped projection 12
a is fitted into the concave portion 10a of the clamp liner 10 and is clamped. Further, the projecting portion 2a of the housing 2 is mounted on the base plate 7 under its own weight. For this reason, there is no possibility that the housing 2 will move in the front-back direction during the rolling operation.

When the center position of the caliber to be used is made to coincide with the shape steel pass line after the caliber change, the following procedure is used. First, the hydraulic cylinder for clamping 11 pushes the piston rod 11a downward, pulls out the wedge-shaped protrusion 12a from the inside of the concave portion 10a of the clamp liner 10, and releases the clamp. In this state, the projecting portion 2a of the housing 2 is placed on the base plate 7 (therefore, the movement of the housing 2 is difficult). Subsequently, the piston rod 8a of the lifting hydraulic cylinder 8 is projected upward, and the housing 2 together with the rail 6 is slightly lifted upward. As a result, the projecting portion 2 a of the housing 2 rises from above the base plate 7. However, the maximum rising distance (stroke) S 'of the piston rod 8a of the hydraulic cylinder 8 is S'.
Is the piston rod 11 of the hydraulic cylinder 11 for clamping.
The wedge-shaped protrusion 12a does not enter the concave portion 10a of the clamp liner 10 when the housing 2 floats up, since the maximum descent distance (stroke) S is set smaller than the maximum descending distance (stroke) S.

In this state, the wheels 5 are rotated by the electric motor 9 and the housing 2 runs along the rails 6. Then, the housing 2 is stopped at a predetermined position.
This stop position has relatively coarse accuracy (for example, ± 5m
m). Then, by pulling up and tightening the piston rod 11a of the hydraulic cylinder 11 for clamping, the wedge-shaped projection 12a is fitted into the concave portion 10a of the clamp liner 10, and the housing 2 is slightly moved on the rail 6 via the wheel 5. , And the center position of the caliber 3a of the rolling roll 3 is highly accurate (for example, & p).
lusmn; within 1 mm), the position of the caliber 3a is corrected (finely adjusted). Therefore, the piston rod 8a of the lifting hydraulic cylinder 8 is lowered to a fixed position, the housing 2 is lowered together with the rail 6, and the overhang portion 2a is placed on the base plate 7 and fixed. At this time, the hydraulic cylinder for clamping 1
It is desirable that the one piston rod 11a be pulled up and tightened (clamped) again.

Although the embodiment of the roll caliber positioning device in the rolling mill according to the present invention has been described above, the present invention can be implemented as follows.

(1) The movement of the housing 2 can be performed not only by the electric motor 9 but also by using a hydraulic cylinder, a screw jack or the like.

(2) The wedge-shaped shapes of the concave portion 10a and the protruding portion 12a are not limited to the trapezoids described above, but may be triangular, substantially semicircular, or the like.

(3) FIG. 4 shows an example in which a large number of concave portions 10a are formed along both sides of the clamp liner 10 along the longitudinal direction. In this example, the clamping hydraulic cylinder 11 is rolled to one side. Two rolls are provided at regular intervals in the axial direction of the roll 3, and a total of four rolls are provided on both sides. In addition, for use of all the calipers 3a of the plurality of types of caliber-equipped rolling rolls 3, both sides of the clamp liner 10 are provided on both sides of the clamp liner 10 so that the center position of each of the calipers 3a coincides with the pass line of the shaped steel as shown in FIG. Thus, a large number of concave portions 10a are formed at predetermined intervals. For this reason, the interval between the concave portions 10a is, for example, 75 mm · 300 m.
m, 170 mm, 275 mm, etc., and are determined as regularly as possible after being carefully calculated so as to correspond to the positions of all the calibers 3a used. Is set so that the projection 12a does not interfere with the set screw 10b for attaching the clamp liner 10 to the base plate 7, for example, one projection 12a is moved to the left side, and the other projection 12a is located near the center. Provided. As a result, it becomes possible to cover all the calivers to be caliber-changed so that their center positions coincide with the pass line. The position of the projection 12a projecting from the tip metal 12 is determined in consideration of the interval (position) between the concave portions 10a of the clamp liner 10 and the position of the set screw.

(4) The means for moving the housing 2 is not limited to the wheels 5, but may be a sliding mechanism such as a linear guide.

[0026]

As is apparent from the above description,
The roll caliber positioning device for a rolling mill according to the present invention has the following excellent effects.

(A) The position of the housing can be accurately adjusted so that the center position of the caliber accurately matches the pass line without using an expensive and high-precision moving device including an encoder and the like. Further, unlike the conventional restraint using only frictional force, the housing is clamped to the base plate by fitting the protrusion on the housing side to the concave portion of the clamp liner on the base plate side, so that the housing is more stable. And strong.

(B) The structure is not complicated as compared with the conventional device, and the operation of adjusting the position of the caliber of the caliber change is simpler than the conventional device, and is easy in a short time regardless of the skill. I can do it.

[Brief description of the drawings]

FIG. 1A is a front view (a view taken along the line AA in FIG. 2) showing an edger rolling mill according to one embodiment of the present invention, FIG.
FIG. 2B is an enlarged front view showing a part (circle) of FIG.

FIG. 2 is a right side view of the rolling mill of FIG.

FIG. 3 is an enlarged cross-sectional view taken along line BB of FIG. 2;

4 shows an example in which a large number of concave portions 10a are formed along the longitudinal direction at both side portions of the clamp liner 10, and is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolling machine 2 Housing 3 Rolling roll 3a Caliber 4 Roll chock 5 Wheel 6 Rail 7 Base plate 8 Hydraulic cylinder (elevating means) 9 Electric motor (Drive device) 10 Clamp liner 10a Concave part 11 Hydraulic cylinder (Clamp mechanism) 12 Tip hardware (Clamp) Block) 12a Projection

Claims (2)

[Claims] 1. A housing in which a rolling roll having a plurality of calipers is rotatably and exchangeably disposed via a roll chock, and a housing is provided so as to be movable on a track by moving means such as wheels. The base plate is configured to be able to move up and down together with the housing via elevating means, and to be able to secure the housing to the base plate during rolling. A clamp liner is integrally fixed to the base plate along the axial direction of the rolling roll. The clamp liner is provided with a plurality of wedge-shaped concave portions at positions corresponding to the respective calipers. A clamp mechanism of a housing for the clamp liner is mounted on the housing, and the clamp mechanism is provided with a concave portion of the clamp liner. Combination of corresponding wedge-shaped projections Positioning device of the roll caliber of the machine. 2. The moving means of the housing comprises wheels capable of traveling on the track and an electric motor for rotating the wheels, the lifting / lowering means being a hydraulic cylinder, and the clamping mechanism being a hydraulic cylinder for clamping. 2. The roll caliber positioning device for a rolling mill according to claim 1, wherein the wedge-shaped projection is integrally formed on the tip metal.