JP3243154B2 - Guide device for universal rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guide device for a universal rolling mill used for rolling an H-section steel.

[0002]

2. Description of the Related Art Shaped steels of various shapes, for example, H-shaped steels, are formed by a universal rolling mill installed in a rolling line. At that time, the web portion of the rolled material is a pair of upper and lower horizontal rolls, the flange portion is rolled by a pair of left and right vertical rolls,
The feed of the rolled material to the mill stand is guided by a guide device on the web portion. The height position of the vertical roll that rolls the flange part is always constant, and in order to keep the pass line constant, change the vertical position of the horizontal roll and align the center of the web part of the rolled material with the pass line. Need to be kept. If such guidance is not possible, the product will be different in height from the web portion of the flange portion, and the occurrence of lower grade products and rejected products will increase.

A conventional guide device used in this universal rolling mill is provided with an H at the front and rear positions of a pair of upper and lower horizontal rolls which are disposed above and below a pass line A and which can be relatively approached and separated from each other.
Vertical guides for guiding the section steel are provided, and the guide surfaces facing each other are set substantially horizontally symmetrically with respect to the pass line A, and
It is configured to properly hold the web of shaped steel and improve product accuracy. The upper and lower guides are rotatably supported on upper and lower horizontal shafts having a base end portion fixed to the housing, and a guide end portion is slidably contacted with a peripheral portion of the upper and lower horizontal rolls by a pneumatic cylinder for guide balance. . Therefore, when inserting / withdrawing the rolling roll, the crane is used to retract the vertical guide. In addition, a guide anti-sway device is provided in the housing to prevent the guide from swinging in the left-right direction due to vibration during rolling, force received from the rolled material, and the like.

[0004]

Since H-beams of various sizes are rolled by the same universal rolling mill, it is necessary to exchange upper and lower guides according to the size of the H-beam to be rolled. When changing the rolls, it is necessary to retract the upper and lower guides to a position that does not hinder the insertion and withdrawal of the rolls. However, in the conventional guide device, since the upper and lower guides are respectively mounted on the horizontal shaft fixed to the housing, each must be removed by a crane, and the guide posture at the time of guide replacement becomes unstable, so that removal and assembly are performed. The work is difficult and takes a long time, and the long-time work of hanging a heavy guide with a crane is dangerous. The present invention solves the above-mentioned problems, and the upper and lower guides can be evacuated quickly to a position that does not hinder the insertion and withdrawal of the rolling roll without using a crane, and the upper and lower guides can be replaced by a crane together with a guide holder. It is an object of the present invention to provide a universal rolling mill guide device that can be easily removed and assembled in a short time.

[0005] Further, rolling 1
When the H-section steel of the pass has a large web tip bend and the vertical guide surface is horizontal, the web tip bend interferes with the vertical guide and the rolled material cannot be reliably guided to the rolling rolls. Cause. The present invention solves the above-mentioned problem. In the first pass of rolling, in which the end of the web of the rolled material has a large bending, the guide surface of the upper and lower guides is opened in a trumpet shape, and after the rolled material bites into the rolling roll. An object of the present invention is to provide a guide device for a universal rolling mill in which a guide opening / closing device for setting a guide surface of an upper and lower guide in a horizontal state is installed in front of a rolling mill, and a rolled material is reliably guided to a rolling roll.

Further, in this type of rolling equipment, a pair of upper and lower guides whose guide surfaces are disposed facing each other with the pass line A as a center is held at one end by a shaft attached to the housing, and the other end is pneumatically driven. Since it is pressed against the horizontal roll by the cylinder force, the vertical guide swings in the left and right direction due to the vibration during rolling and the lateral force received from the rolled material. It is difficult to guide to. Further, since the guide anti-sway mechanism is attached to the shaft provided in the housing, there is a problem in replacing the guide when inserting and pulling out the rolling roll. The present invention solves the above problems, by fitting the protrusion at the guide tip into the U-shaped groove of the guide anti-sway device provided in the guide holder incorporating the vertical guide,
An object of the present invention is to provide a guide device of a universal rolling mill that can reliably guide a rolled material to a rolling roll without swinging the guide in the left-right direction due to vibrations during rolling, a force received from the rolled material, and the like.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a universal rolling mill housing with a guide.
Supporting the holder holder loading table and the guide holder loading table
The guide surface supports a guide holder that incorporates a pair of upper and lower guides that are arranged facing each other around the pass line.
When replacing a roll or a guide,
Both the loading holder loading table and the guide holder are horizontal.
Guide device der universal rolling mill, characterized in that the retractable in the longitudinal direction of the left rolling line holding the
You. Further, a guide opening / closing mechanism is provided on the guide holder , an angle of a guide surface of the vertical guide with respect to a pass line is made variable, and a guide lateral vibration preventing mechanism is provided on the guide holder.

According to the above means, when rolling various H-section steels, the guide surfaces of the upper and lower guides can be arbitrarily opened and closed, and can receive vibrations during rolling and lateral forces from the rolled material. In addition, the rolled material can be reliably guided to the rolling roll. Further, at the time of changing the rolls, the vertical guide can be quickly retracted to a position where it does not hinder the insertion and withdrawal of the rolls without using a crane.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
It will be described in detail based on. A rolling line for rolling an H-section steel by reciprocating a plurality of times on the pass line A is provided with a rough universal rolling mill and an edging rolling mill, and an intermediate guide is provided between the rolling mills. In addition, a tilt table (not shown) is disposed at each of the front and rear portions of each rolling mill. The rough universal rolling mill 1 is provided with guide devices 35 at front and rear positions of a pair of upper and lower horizontal rolls 2 and 3 that can move relatively close to and away from each other.

The guide device 35 has a pair of upper and lower guides 6 having guide surfaces 6a and 7a for guiding a web 34a of an H-section steel 34 at vertically symmetric positions of a pass line A as shown in FIGS. 7 are provided. Guide surface 6a on the bottom
Is formed on the upper guide 6, a U-shaped fitting portion 6c is formed at an upper position and opened in the line traveling direction, and the fitting portion is rotatable by the left and right guide holders 4a and 4b. It is detachably and rotatably fitted and supported on the upper eccentric shaft 5a which is supported and disposed in the horizontal direction orthogonal to the pass line A, and is fitted from both sides by the guide fixing ring 5c, and is provided with a positioning pin ( The upper eccentric shaft 5 (not shown)
a.

The taper of the upper eccentric shaft 5a, the taper of the guide U-shaped portion, the U-shaped groove of the guide anti-vibration plate 4f of the guide anti-vibration device 36 installed in the guide holder, and the projection 6b at the tip of the upper guide. Are positioned in the direction perpendicular to the line.

The upper guide 6 is provided in the housing 1L.
Is suspended by an upper guide balance pneumatic cylinder 8a provided in a separator connecting the upper guide 1R and the upper guide 6 and the upper guide 6 rotates about the upper eccentric shaft 5a. It is in sliding contact with the peripheral surface.

On the other hand, the lower guide 7 having the guide surface 7a formed on the upper surface has a U-shaped fitting portion which is opened downward, and the fitting portion 7c is formed by the left and right guide holders 4.
The lower eccentric shaft 5b disposed in the horizontal direction perpendicular to the pass line A rotatably supported by the shafts a and 4b is detachably and rotatably fitted and supported. It is mounted on the lower eccentric shaft 5b, and the U-shaped groove and the lower portion of the guide anti-sway plate of the guide anti-sway device 36 provided on the stepped portion near the center of the lower eccentric shaft 5b and the lower separator 4d of the guide holder. Positioning in the direction perpendicular to the line is performed by fitting the projection 7b at the tip of the guide. The lower guide 7 is pulled down by a lower guide balance pneumatic cylinder 8b provided in a separator connecting the housings 1L and 1R, and the lower guide 7 rotates about the lower eccentric shaft 5b.
The leading end thereof is in sliding contact with the peripheral surface of the lower horizontal roll 3.

The left and right guide holders 4a and 4b into which the vertical eccentric shafts 5a and 5b are incorporated are mounted on the guide holder loading table 1.
2 are connected by an L-shaped upper separator 4c and a lower separator 4d, which can be stacked, and have an integral structure. Upper separator 4c of the guide holders 4a, 4b
A positioning block 19 is attached to the housing 1 and is configured to be positioned when a guide holder is inserted by a stopper 18 attached to a separator connecting the housings 1L and 1R. In addition, the guide holder 4
Are positioned on the inner wall of the housing by the projections 4e, are assigned to the projections 1a, 1b at the lower part of the housing, and are clamped to the side surface of the housing 1 by four guide clamp devices 37.

FIGS. 4 and 5 show the guide clamp device 37. FIG. One end of a clamp gate 20 rotatably fitted and supported on a bracket provided on the housing 1 by a pin 21 is pressed against the guide holder 4, and the other end of the wedge 22 is guided by a hydraulic cylinder 23 for guide clamping to the housing 1 and the clamp gate 20. The guide holder 4 is clamped to the housing 1 by being inserted therebetween (FIG. 4). In addition, wedge 2
2 is a wedge guide block 2 provided on the housing 1
It is guided by 5 and moves. The clamp gates 20 provided at the upper two locations are opened and closed by extension of the clamp gate opening / closing pneumatic cylinder 24 provided on the wedge guide block 25. On the other hand, the clamp gates 20 provided at the two lower portions are manually opened and closed.

The guide opening / closing device 38 includes the guide holder 4
vertical eccentric shafts 5a and 5b rotatably supported by the shafts a and 4b
At one end, a clutch shaft 27 that is rotatable and slidable by a pneumatic cylinder 29 for opening and closing a clutch is provided on a bearing 26 provided in the housing, and a lever 28 is attached to an end of the clutch shaft. I have. By rotating the lever 28 by the guide opening / closing hydraulic cylinder 30 installed in the housing 1, the upper and lower guide surfaces 6a, 7a can be opened and closed in a horizontal state or in a trumpet shape.

The guide rearranging device 39 will be described with reference to FIGS. One end of a shaft 10 rotatably incorporated in a bearing 9 provided on an upper separator connecting the housing is attached to an arm 13 that rotates together with the shaft 10 by a fixed key 13a, and attached to the housing 1R. It is connected to a guide changing hydraulic cylinder 17. Axis 10
Is rotatably inserted into the upper sprocket 14a. The sprocket 14a is prevented from rotating by a block 14b attached to the housing 1L. A frame 11 fixed by a fixed key 11a is attached between the bearing 9, the arm 13 and the sprocket 14a so as to rotate together with the shaft 10, and the frame 11 is connected by an upper and lower separator. A guide holder loading table 12 that is rotatable with respect to the frame 11 is incorporated in a lower portion of the frame 11, and a sprocket 15 has a fixed key 15 mounted on a shaft at an end of the loading table.
a. The sprocket 14a and the sprocket 15 are connected by a roller chain 16.

In the above configuration, the shaft 10 is rotated by the arm 13 by the extension of the guide changing hydraulic cylinder 17, and the sprocket 14 a fixed to the housing 1 and the sprocket 15 are connected by the roller chain 16. Is fixed to the end shaft of the guide holder loading table 12 with the fixing key 15a, so that the guide holder loading table 12 slides between both end shafts of the guide holder loading table and the frame 11 and rotates in the opposite direction to the frame 11. Then, the frame 11 is rotated while the guide holder loading table upper surface 12a is always kept horizontal. Therefore, the upper and lower guides 6, 7 can be retracted in a stable posture. A similar effect can be obtained by rotating the guide changing frame by a link mechanism (not shown) as a means other than the above.

Next, a description will be given of a procedure for retracting the upper and lower guides 6, 7 on the rear surface of the universal rolling mill to a position which does not hinder the insertion and withdrawal of the rolling rolls when changing the rolling rolls according to the rolling schedule. First, an intermediate guide (not shown) is lifted by a crane and transported to a place where it does not hinder the evacuation of the guide holder. Next, the pneumatic cylinders 8a, 8b for vertical guide balance are extended to extend the vertical guides 6,7.
Remove from The pneumatic cylinder 29 for opening and closing the clutch is operated to cut off the edges of the vertical eccentric shafts 5a and 5b and the clutch 27,
The upper and lower guide clamp hydraulic cylinders 30 of the guide holders 4a and 4b are operated to retract the wedge 22 and release the guide clamp state. The upper clamp gate 20 is opened by a pneumatic cylinder 24 for opening and closing the clamp gate, and the lower clamp gate 20 is manually opened to a position where there is no hindrance to the rearrangement of the guide. Thereafter, the guide changing hydraulic cylinder 17 provided in the housing 1L is operated to rotate the guide holder 4 to a position where it does not hinder the insertion and withdrawal of the rolling roll.

When the guide is replaced with a guide corresponding to the H-section steel to be rolled, the positioning block 19 provided on the upper part of the guide holder in the above state is used.
The guide holder is lifted by a crane until the guide holder is removed from the housing 2. Then, the frame 11 is rotated by the guide changing hydraulic cylinder 17, and the guide holder 4 is pulled into the housing which does not hinder the guide changing, and the guide holder 4 is transported to a predetermined place by the crane. I do. The installation of a new guide holder prepared in advance offline is performed in the reverse order of the above-mentioned removal.

[0021]

According to the present invention, the guide holder in which the upper and lower guides are incorporated can be quickly retracted without using a crane, so that the roll change time can be reduced. Further, the vertical guide of the next rolling size can be prepared offline in the guide holder, and the vertical guide can be replaced at the same time, so that the guide replacement time can be reduced.

In addition, since the guide surfaces of the upper and lower guides can be arbitrarily opened and closed during rolling and the guide can be prevented from swaying, the rolled material can be reliably guided to the rolling rolls, thereby improving the product accuracy.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention.

FIG. 2 is an overall front view showing the embodiment of the present invention.

FIG. 3 is an overall side view showing an embodiment when replacing a web guide according to the present invention.

FIG. 4 is a view showing an embodiment at the time of clamping of the guide clamp device of the present invention.

FIG. 5 is a view showing an embodiment when the guide clamp device of the present invention is unclamped.

FIG. 6 is an overall side view showing an embodiment of the guide opening / closing device of the present invention.

FIG. 7 is an explanatory view showing an embodiment of opening and closing a guide according to the present invention.

[Explanation of symbols]

A: Pass line 1, 1L, 1R: Housing 1a, 1b: Projection 2: Upper horizontal roll 3: Lower horizontal roll 4, 4a, 4b: Guide holder 4c: Upper separator 4d: Lower separator 4e: Projection 4f: Upper guide side Anti-vibration plate 5a: Upper eccentric shaft 5b: Lower eccentric shaft 5c: Upper guide fixing ring 6: Upper guide 6a: Upper guide guide surface 6b: Projection 6c: U-shaped fitting portion 7: Lower guide 7a: Lower guide Guide surface 7b: Projection 7c: U-shaped fitting portion 8a: Upper guide balance cylinder 8b: Lower guide balance cylinder 9: Bearing 10: Rotating shaft 11: Rearrangement frame 11a: Fixed key 12: Guide holder mounting table 12a : Upper surface of guide holder loading table 13: Arm 13a: Fixed key 14a: Upper sprocket 14b: Block 15: Lower sprocket 15a: Fixed key 16: Roller chain 17: Guide changing cylinder 18: Stopper 19: Positioning block 20: Clamp gate 21: Pin 22: Wedge 23: Hydraulic cylinder for guide clamp 24: Pneumatic cylinder for opening and closing clamp gate 25: Wedge guide block 26: Bearing 27: Clutch shaft 28: Lever 29: Clutch opening / closing cylinder 30: Hydraulic cylinder for opening / closing a guide 31: Upper horizontal roll chock 32: Lower horizontal roll chock 33: Vertical roll chock 34: H-shaped steel 34a: Web 35: Guide device 36 ： Guide anti-sway device 37 ： Guide clamp device 38 ： Guide opening / closing device 39 ： Guide rearrangement device

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Takashi Kitamura 46-59 Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Corporation Machinery & Plant Business Department (56) References Japanese Utility Model 63-138903 (JP) , U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B21B 39/14 B21B 1/08 B21B 39/16

Claims (3)

(57) [Claims] (1) A guide is provided on a housing of a universal rolling mill.
Supporting the holder holder loading table and the guide holder loading table
The guide surface supports a guide holder that incorporates a pair of upper and lower guides that are arranged facing each other around the pass line.
When replacing a roll or a guide,
Both the loading holder loading table and the guide holder are horizontal.
A guide device for a universal rolling mill, wherein the guide device can be retracted in the front-rear direction of the rolling line while holding the roll . 2. The guide device for a universal rolling mill according to claim 1, wherein a guide opening / closing mechanism is provided on the guide holder, and the angle of the guide surface of the upper and lower guides with respect to the pass line is made variable. 3. The guide device for a universal rolling mill according to claim 1, wherein a guide run-out preventing mechanism is provided on the guide holder.