JP2858601B2 - Rolling roll stand - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling roll stand for an electric resistance welded tube or the like.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show a conventional ERW pipe squeeze stand selected as a typical example of a rolling roll stand.

In the figure, 1 is a frame, 2 is a change plate fitted into one frame, 3a is a left upper roll, 3b is a right upper roll, 4a is a left side roll, 4b is a right side roll, 5 is a lower roll. Roll, 6a is upper left roll chock, 6b is right upper roll chock, 7
a is a left side roll chock, 7b is a right side roll chock, 8 is a lower roll chock, 9a is a left upper roll reduction apparatus, 9b is a right upper roll reduction apparatus, 10a is a left side roll reduction apparatus, 10b is a right side roll reduction apparatus, 11 Is a lower roll pressing device.

[0004] Left and right upper roll chocks 6a, 6b,
The left and right side roll chocks 7a and 7b and the lower roll chock 8 are left and right upper rolls 3a and 3 respectively.
b, left and right side rolls 4a, 4b and lower roll 5
Is rotatably supported, and the left and right upper roll chocks 6a,
6b is obliquely up and down along the guide surface of the slide base 12 by the upper and lower roll lowering devices 9a and 9b.
The left and right side roll chocks 7a and 7b move in the horizontal direction along the groove 2a of the change plate 2, and the lower roll chock 8 moves in the vertical direction by the screw-down device 11 that reciprocates the wedge 11b with the screw shaft 11a.

The left and right upper roll pressing devices 9a and 9b and the left and right side roll pressing devices 10a and 10b are moved by a reciprocating mechanism using a screw shaft (not shown) driven by a motor 14. (That is, the motor reciprocates with the worm of the motor shaft, the worm wheel screwed to the screw shaft, and the screw shaft.)

The slide base 12 is provided for removing the upper left and right roll chocks 6a, 6b and the rolls 3a, 3b. The slide base 12 extends horizontally along the tongue-shaped guide surface 13a of the guide member 13 fixed to the change plate 2. Move in the direction.

The change plate 2 is guided to a groove of a guide block 15 attached to the main frame 1 and descends along a guide surface 1g of the main frame 1. There are inclined surfaces 2a and 2b on both sides of the bottom of the change plate 2, and are fitted and fixed in the inclined grooves 1a and 1b of the main frame 1.

Next, each roll 3,
In order to take out 4 and 5, the connection between the side roll chock 7 and the side roll press-down device 10 is released, and a wire is hung on the hanging bracket 16 of the change plate 2 and lifted by a crane. At this time, the left and right upper rolls 3a and 3b, the left and right upper roll chocks 6a and 6b, and the left and right upper roll lowering devices 9a and 3b are taken out together with the change plate 2.
9b, left and right side rolls 4a and 4b, left and right side roll chock 7a and 7b, lower roll 5 and lower roll chock 8.

[0009] Each roll 3, 4, of the squeeze stand
Numeral 5 is rotated by the running of the semi-finished electric resistance welded pipe W drawn out from the previous process (rolling around), and the electric resistance welded pipe is squeezed into a circular shape, and the circular joining surface is accurately fitted.

[0010]

When the squeeze roll is replaced in the above-mentioned rolling roll stand, the bolts connecting the left and right side roll chocks and the left and right side roll rolling down devices are removed, and the crane is moved upward by a crane. And lift the change plate out of the squeeze stand. At this time, the lowering device of the left and right upper rolls is also taken out together, so remove this lowering device and attach this lowering device to the newly replaced change plate, or attach another left and right lower plate to the newly replaced change plate. A lowering device for the upper roll must be installed and placed in advance. Furthermore, after the replacement, a new change plate must be attached to the frame of the squeeze stand, and the left and right side pressure reduction devices must be joined to the left and right side roll chocks.

[0011] Therefore, there is a problem that a considerable number of man-hours and time are required for exchanging the rolls, and the operating rate of the ERW tube mill is reduced.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a roll roll stand such as an electric resistance welded tube in which a number of rolls are incorporated. A lifting device capable of raising and retracting one of the screw blocks is provided, and a drawer device for moving a change plate integrally assembled with each roll chock in and out of the rolling line in a direction perpendicular to the rolling line is provided. .

[0013]

[Function] A joint that separates from the left and right upper roll chock and the left and right upper roll reduction device in the drawing direction, and a device that rotates 90 ° between one side roll chock and the side roll reduction device. A joint which is disengaged is further provided between the other side roll chock and the side roll pressing device, and a joint which is disengaged when the screw block of the other side roll pressing device moves in the vertical direction. Therefore, after lifting the screw block of the other side roll pressing device with the lifting device, and extruding the change plate with the drawer in the direction perpendicular to the rolling line of the ERW pipe, each roll and each roll chock can be easily formed. Removed with change plate.

[0014]

1 and 2 show a front view of an outer shape of a squeeze stand according to the present invention and an enlarged front view of main parts related to the present invention. FIGS. 3 and 4 show II of FIG. 1 respectively.
FIGS. 5 and 6 are a sectional view taken along line VV and a sectional view taken along line VI-VI of FIG. 4, respectively.

The squeeze stand 21 has a left or right upper roll 23a, 23b rotatably supported by a main frame 22, an L-shaped change plate 50, and a left or right upper roll chock 26a, 26b, respectively.
Left or right side rolls 24a, 24b rotatably supported by left or right side roll chock 27a, 27b, lower roll 25 rotatably supported by lower roll chock 28, left or right upper roll chock 26a, 26b. Left and right upper roll press-down devices 29a, 29b (see FIG. 5) for vertically moving along the bevel-shaped groove formed by the inclined surface of the trapezoidal block 32u attached to the L-shaped change plate 50. ),
The left or right side roll rolling device 30a, which moves the left or right side roll chock 27a, 27b in the horizontal direction along the dovetail groove formed by the inclined surface of the trapezoidal block 32s of the L-shaped change plate 50, respectively. 30
b (see FIG. 6), the lower roll pressing device 3 which moves the lower roll chock 28 along the bevel-shaped groove formed by the inclined surface of the trapezoidal block 32e of the L-shaped change plate 50.
1 (see FIG. 6), an elevating device 34 for vertically moving the screw block 33 of the right side roll pressing device 30b,
A drawer 35 for pulling out the L-shaped change plate 50 in the horizontal direction (perpendicular to the rolling line), and connecting the screw shafts 29as, 29bs of the left or right upper roll pressing devices 29a, 29b with the left or right upper roll chocks 26a, 26b, respectively. And the joints 36a and 36b for separating and the joint 37b for connecting and separating the screw shaft 30bs of the right side roll rolling down device 30b and the right side roll chock 27b.
(See FIG. 6), a joint 37a (see FIGS. 2 and 6) that connects and separates the left side roll rolling device 30a and the left side roll chock 27a by rotating 90 °, and a hydraulic rotary that rotates the joint 37a by 90 °. It comprises an actuator 38 (see FIG. 2).

Each roll pressing device 29a, 29b, 30
a, 30b and 31 are attached to the main frame 22.

The joint 37b is moved in the vertical direction (opening / closing direction at the time of drawing) so that the joints 36a and 36b can be engaged by moving in the vertical direction and can be separated from each other by moving in the horizontal direction (drawing direction). When the joint 37a rotates 90 ° from the engagement (connection) position as described above, the joint 37a comes into contact with and separates from each other. These joints 36 and 37 are, as shown in FIGS.
T-shaped groove 39 and T which can move in the longitudinal direction of this groove 39
The T-shaped head 4 of the joint 37a.
In the case of 0, by rotating by 90 °, a narrow portion (dashed line in FIG. 6) comes out of the T-shaped groove.

As shown in FIG. 1 and FIG.
4 is a lifting motor 41, a universal joint 4
2, a miter gear box 43 and a screw shaft 44, and an upper end of the screw block 33 of the right side roll pressing-down device is screwed to the screw shaft 44.

The drawer 35 comprises a long-stroke hydraulic cylinder 45 and a slide rail 46 fixed to the main frame 22. A hydraulic cylinder 4 is attached to a joint 47 attached to the side end surface of the L-shaped change plate 50.
The five output ends are hinged.

Next, the L-shaped change plate 50 is positioned by a block 49 for setting the mounting reference surface of the main frame 22 and the slide rail 46, and the upper inclined surface of the L-shaped change plate 50 is clamped by the clamp lever 52. It is fixed (see FIG. 4). However, when the electric resistance welded pipe is squeezed, the squeezing force is received by each of the screw-down devices 29, 30, and 31, so that the squeezing force is not applied to the slide rail 46.

With the above-described structure, the upper left and right rolls 2 integrally mounted on the L-shaped change plate 50 are provided.
3. The squeeze roll 51 including the left and right upper roll chock 26, the left and right upper roll 24, the left and right side roll chock 27, the lower roll 25, and the lower roll chock 28 is orthogonally crossed from the squeeze stand 21 to the rolling line of the ERW pipe W. In order to pull out in the direction (horizontal direction), first, the roll pressing devices 29, 30, 31 are moved to the pulling-out position, and the screw shafts 29as, 29bs of the left and right upper roll pressing devices 29a, 29b are slightly lowered. Screw shafts 30as, 3 of left and right side roll rolling devices 30a, 30b
Obs is slightly shifted horizontally toward the center, a clearance is provided between the T-shaped grooves 39 of the joints 36 and 37 and the T-shaped head 40, and the hydraulic rotary actuator 38 is rotated 90 ° to engage the joint 37a. Untie. Next, the screw shaft 31s of the lower roll pressing device 31 is lowered to a position where it does not become a hindrance when pulled out, and the clamp lever 52 fixing the L-shaped change plate 50 to the main frame 22 is removed.

Next, after the screw block 33 of the right side roll rolling down device 30b is pulled up by the lifting device 34, the squeeze roll 51 is pulled out to the right side of the squeeze stand 21 by the drawer device 35. To assemble the squeeze roll 51, the above process is reversed.

When the squeeze roll 51 is lifted by the crane together with the L-shaped change plate 50, the hanging tool 53 is attached to the hanging tool mounting bracket 52 of the L-shaped change plate 50.

The present invention is not limited to the above embodiment,
It goes without saying that various changes can be made without departing from the spirit of the present invention.

[0025]

As described in the squeeze stand which is a typical example of the roll roll stand in the roll roll stand such as the ERW pipe according to the present invention, the left and right rolls integrally mounted on the change plate. Since the roll chock, the left and right side rolls, the roll chock, the lower roll, and the lower roll chock are drawn out in a direction perpendicular to a rolling line such as an electric resistance welded pipe, the squeeze roll can be replaced easily in a short time and easily. I can do it. Therefore, the operating rate of the entire rolling device such as an electric resistance welded tube mill device increases.

Further, it is not necessary to remove the left and right upper roll press-down devices after taking out the squeeze roll as in the prior art.

[Brief description of the drawings]

FIG. 1 is a front view of a squeeze stand and a squeeze roll according to an embodiment of the present invention.

FIG. 2 is a front view showing a main part of the squeeze stand.

FIG. 3 is a view taken in the direction of the arrow III in FIG. 1;

FIG. 4 is a view on arrow IV in FIG. 1;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is a front view of a conventional squeeze stand.

FIG. 8 is a side view of a conventional squeeze stand.

[Explanation of symbols]

 21 squeeze stand 22 main frame 23a, 23b left, right upper roll 24a, 24b left, right side roll 25 lower roll 26a, 26b left, right upper roll chock 27a, 27b left, right side roll chock 28 lower roll chock 29a, 29b left, right Upper roll lowering device 30a, 30b Left and right side roll lowering device 31 Lower roll lowering device 34 Lifting device 35 Pull-out device 36a, 36b, 37a, 37b Joint 38 Hydraulic rotary actuator 46 Guide rail 50 L-type change plate 51 Squeeze roll

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Franz Nikolai Germany D-4050 Monken Gladbach 1 Aurel Kielweg 66 Mannesmann Demag-Hüten Technique Geselshaft-Sgurgruppe Meyer Roll Technique (72) Inventor Engelbert Mylander Germany D-4050 Monken Gladbach 1 Aurel Keelweg 66 Mannesmann Demag-Hütten Technique Gesellschaftschulpppe Meyer Roll Technique (56) References JP-A-57-32829 (JP, A) JP-A-59-199113 (JP, A) JP-A-62-270287 (JP, A) JP-A-2-160122 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , D B name) B21C 37/08 B21D 5/06-5/14

Claims (2)

(57) [Claims] In a rolling roll stand such as an electric resistance welded tube incorporating a large number of rolls, an elevating device for raising and retracting one of the screw blocks of the left and right side roll pressing devices attached to a frame is provided. A rolling roll stand provided with a drawer device for allowing a change plate integrally assembled with each roll chock to enter and exit in a direction perpendicular to a rolling line during retreat. 2. The rolling roll stand according to claim 1, wherein the roll chocks are mounted on the change plate in a cantilever manner.