JP3053534B2 - Squeeze 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 squeeze roll stand, and more particularly, to a squeeze roll stand capable of automatically replacing an upper roll and fixing a small face plate to a large face plate with a large clamping force.

[0002]

2. Description of the Related Art ERW pipes, such as pipes for water pipes and gas pipes, ventilation ducts, etc., are obtained by continuously bending a strip-shaped thin plate derived from an uncoiler into a circular cross section or a rectangular cross section using an ERW pipe forming machine. It is manufactured by forming and then seam welding the butted portion of the thin plate to a predetermined length. An electric squeeze roll stand, called a squeeze roll stand, forms a thin plate into a shape at the time of welding by pressing the upper groove of the curved thin plate with upper left and right rolls at the upstream of the welding device. A sewing tube forming machine is arranged.

[0003] Incidentally, since the size and shape of ERW pipes manufactured by one ERW pipe manufacturing line vary widely, the lower roll and the left and right side rolls incorporated in the squeeze roll stand are changed every time the type is changed. Then, a forming roll such as a pair of upper rolls must be replaced. The longer the roll replacement time, the lower the operation rate of the manufacturing equipment. Therefore, when manufacturing a squeeze roll stand, there is a demand for an apparatus design that enables the roll replacement in as short a time as possible.

Therefore, for example, an upper roll, an upper roll axle box, and an apparatus for lowering the upper roll axle box are provided, such as a "squeeze roll stand" of Japanese Utility Model Application Laid-Open No. Sho 60-28982 filed previously by the present applicant. The installed small face plate is detachably pressed to the large face plate on the upper roll stand side by using two types of clamping devices, an end clamper for regulating vertical movement and an end clamper for regulating lateral movement. There is known a structure in which a pair of upper rolls is removed from a large face plate together with a small face plate so that the rolls can be easily and quickly exchanged.

[0005]

By the way, the squeeze roll stand is arranged close to the welding device due to the configuration of the electric resistance welded pipe manufacturing equipment. This is inevitable in terms of welding efficiency, and for example, the squeeze roll stand cannot be installed away from the welding device. Therefore, the replacement work of the small face plate with the upper roll is performed in a narrow work space between the two devices by an overhead crane or the like. At this time, since the small face plate is suspended in a two-point support state by the overhead crane, the vertical state is likely to be unstable, and when placing the small face plate at the clamp position of the large face plate, four or five workers are required. Thus, horizontal positioning of the small face plate and correction of the inclination direction are performed. As a result, although the roll changing operation can be shortened as compared with the related art, it is not always sufficient.

Further, the forming load applied to the upper roll at the time of forming the ERW pipe is more than 50 tons, and among the ERW pipe forming machines, the small face plate to which this roll is attached only to the roll which is most concerned with the quality of the product is large. It is necessary to be clamped to the face plate with a large clamping force. However, in order to satisfy this, a large clamping device is required, but since it is arranged in a narrow space as described above, it has been difficult to actually install it.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a squeeze roll stand that enables automatic replacement of an upper roll and that can fix a small face plate to a large face plate with a large clamping force.

[0008]

According to the present invention, there is provided a semiconductor device comprising:
The squeeze roll stand described in the squeeze roll stand, wherein a small face plate having an upper roll and a vertically movable upper roll axle box is detachably pressed against a press contact surface of a large face plate, The small face plate roughly arranged in the vicinity can be inserted into a predetermined number of clamp holes formed in the small face plate, with contact / separation means having a contact / separation member for pulling or separating the small face plate toward the pressing contact side of the large face plate. A predetermined number of clamping means having a suitable clamping member and a position adjusting means for the small face plate are provided on the large face plate side. In addition, the large face plate side here means, in addition to the large face plate,
It also includes an upper roll stand that serves as a mounting base for the large face plate that is deployed as needed.

[0009]

In the squeeze roll stand according to the first aspect, when replacing the upper roll, first, the clamp member is pulled out of the clamp hole of the small face plate in which the old upper roll is incorporated by the clamp means, and the contact / separation means is separated. The member separates the small face plate pressed against the pressing face of the large face plate, and then removes the small face plate by lifting it with, for example, an overhead crane. Next, for example, using a ceiling crane or the like, the small face plate in which the new upper roll is incorporated is suspended, so that the small face plate is roughly arranged near the pressing contact surface of the large face plate, and the contact / separation member of the contact / separation means is used. Since the small face plate is drawn toward the pressing face side, it is not necessary to accurately arrange the small face plate on the pressing face side of the large face plate. Subsequently, the small face plate drawn toward the pressing surface is adjusted by the position adjusting means to a position where the clamp member of the clamp means can be inserted into the clamp hole of the small face plate, and then the clamp member is moved to the corresponding clamp hole by the clamp means. And the faceplate is clamped to the faceplate with great force.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is an exploded perspective view of the large and small face plates of the squeeze roll stand according to one embodiment of the present invention, FIG. 2 is an overall perspective view of the squeeze roll stand, FIG. FIG. 4 is an enlarged perspective view of a main part including a partial cross-sectional view showing a state where the small face plate is arranged near the pressing surface of the large face plate, and FIG. 5 includes a partial cross-sectional view showing a state after the position adjustment of the small face plate. FIG. 6 is an enlarged perspective view of a main part including a partial cross-sectional view showing a clamp state of the small face plate to the large face plate.

As shown in FIGS. 1 to 3, a squeeze roll stand 10 according to one embodiment of the present invention has a side roll stand 11 provided on an electric resistance welded pipe manufacturing equipment line a. Below the notch 12 formed in the center of the stand 11, a press-up device 13 is housed. A lower roll axle box 15 in which a lower roll 14 is stored is arranged on the lifting device 13. On both sides of the side roll stand 11, pressure side devices 2 of left and right side roll axle boxes 18, 19 in which left and right side rolls 16, 17 are stored.
A V-shaped arrangement of a pair of left and right upper rolls 21 that presses the groove at the top of the curved sheet for forming an electric resistance welded tube is provided above the reference numeral 0. Each upper roll 21 is stored in an upper roll axle box 22, and each upper roll axle box 22
Is attached to a rod 24j of a screw-down device 24 fixed to the upper part of the small face plate 23.

The lowering device 24 includes an upper flange portion 23 of the small face plate 23.
electric motor 24b fixed to a through a speed reducer 24a
And a pulley 24d fixed to an output shaft 24c of a reduction gear 24a, and a pulley 2 of a gear box 24f attached to a box-shaped bracket 24e on an upper portion of the small face plate 23.
4g is connected by a belt 24h, and the rod 24 of the cylinder 24i is connected through the gear box 24f.
By moving j in and out, the upper roll axle box 22 fixed to the lower end of the rod 24j is moved up and down.

Downstream of the side roll stand 11, an upper roll stand 25 is provided in close proximity. The upper end of the upper roll stand 25 on the upstream side of the line is provided with a rod 26a of a screw-down device 26. A large face plate 27 whose height can be adjusted is attached. A pressing contact surface 27a, which is a surface on the upstream side of the line of the large face plate 27,
The small face plate 23 is detachably pressed. In addition, a total of seven oblong clamp holes 23b are formed at predetermined positions of the small face plate 23 (see FIG. 1).
In the center of the surface on the upstream side of the line No. 3, an upper roll shaft box 22 is provided.
A thick guide plate 23f for adjusting the position is mounted, and a key-shaped hook portion 23c formed at the lower end of the guide plate 23f is hooked on a hook portion 27b below the large face plate 27. By doing so, the small face plate 23 is fixed at the clamp height position (see FIG. 5). The guide plate 23f is
A protruding piece 23d protruding from the surface on the line upstream side of the small face plate 23
The height is adjustable via a double nut structure 23e.

The large face plate 27 is a thick plate material, and a total of seven long hole-shaped clamp holes 28 which can communicate with the clamp holes 23b of the small face plate 23 are formed at predetermined positions, respectively. Behind the hole 28, a clamp cylinder 29, which is an example of a clamp unit for clamping the small face plate 23, is attached. Clamp cylinder 29
Is a cylinder that can rotate a clamp rod 29a, which is an example of a clamp member having a horizontally elongated tip portion, by 90 degrees about an axis.

From the upper part on both sides of the large face plate 27 to the center, thick L-shaped brackets 30 are respectively attached to the line upstream so as to protrude to the upstream side of the line. , Horizontal notch 30a
Are formed. A contacting / separating member 31 having a U-shaped cross section is horizontally slidably attached to the formation portion of the notch 30a, and a protrusion 31a is provided at an end of the outer surface of each contacting / separating member 31 on the downstream side of the line. Is formed. The contact / separation member 31
Is substantially longer than the thickness of the small face plate 23. A rod 33 of a small hydraulic cylinder 32, which is an example of a contacting / separating means attached to the bracket 30, is fixed to the inner surface of the projection 31a, and these rods 33 are moved in and out in synchronization with each other. The small face plate 23 loosely inserted from above into the U-shaped right and left contact / separation members 31 is drawn toward or away from the pressing face 27a of the large face plate 27.

On each hydraulic cylinder 32, a small hydraulic cylinder 34, which is an example of a position adjusting means capable of moving up and down the small face plate 23, is disposed.
5 in and out, so that the upper flange portion 23a
The small face plate 23 is moved up and down by a slight length through both ends of the small face plate 23.

In FIG. 2, reference numeral 36 denotes a chopper conveyor, reference numeral 37 denotes a cutter for an external bead, reference numeral 38 denotes an electric resistance welded tube, reference numeral 39 denotes a cotter in FIG. 3, and reference numeral 40 denotes a fitting portion in FIG.

Next, the operation of the squeeze roll stand 10 according to one embodiment of the present invention will be described. As shown in FIG. 2, the thin sheet for forming an ERW pipe formed upstream by an ERW pipe forming machine into a shape of an ERW pipe 38 is formed by a pair of upper rolls 21 when passing through the squeeze roll stand 10. The upper groove is pressed down from above, and immediately before that, the groove is welded by a seam welding device (not shown) arranged on the upstream side, and the outer bead attached to the outer peripheral surface of the ERW pipe 38 further downstream is formed. , Cutter 37.

At the time of roll replacement, first, as shown in FIG.
By rotating the clamp rod 29a by 0 °, the lateral end of the clamp rod 29a is pulled out from the clamp hole 23b of the small face plate 23 and stored in the clamp hole 28 of the large face plate 27. Next, as shown in FIG. 4, the rod 35 of the hydraulic cylinder 34 is retracted, the small face plate 23 is lowered slightly, and then the rod 33 of the hydraulic cylinder 32 is retracted. When the member 31 is moved in the upstream direction of the line, the old small face plate 23 with the upper roll 21 that has been pressed against the pressing face 27a of the large face plate 27 is separated outward. Then, as shown in FIG. 1, when the small face plate 23 is lifted by, for example, an overhead crane, the old small face plate 23 with the upper roll 21 is removed. Then, as shown in FIG.
Along with 8, 19, the old lower roll 14, the left and right side rolls 16, 17 are lifted one by one and removed.

Subsequently, the new lower roll 14 and the left and right side rolls 16 and 17 are suspended by an overhead crane, and then, as shown in FIGS. Is suspended in the gap between the contact / separation members 31 arranged at both ends. At this time, since the gap between the contact / separation members 31 is relatively large, even if the position of the overhead crane is not accurately controlled, the small face plate 23 can be controlled roughly.
Can be arranged near the pressing surface 27a of the large face plate 27. In addition,
The clamp hole 23b of the small face plate 23 is disposed slightly below the clamp hole 28 of the large face plate 27, and here, a gap d is formed between the small face plate 23 and the pressing surface 27a of the large face plate 27. (See FIG. 4). Subsequently, the rod 33 of each hydraulic cylinder 32 is made to protrude by a force that can be pushed up by the hydraulic cylinder 34, so that the contact / separation member 3
1 slides toward the large face plate 27, and pushes the small face plate 23 against the pressing surface 27a.
To make contact. Thereafter, the rod 35 of the hydraulic cylinder 34
When the small face plate 23 is pushed up by projecting the
Are hooked on the hooks 27b of the large face plate 27, so that the clamp holes 23b, 28 of the large and small face plates 23, 27 are in communication with each other.

Next, as shown in FIG. 5, the clamp rods 29a of the respective clamp cylinders 29 are protruded until their laterally long distal ends once protrude outside the clamp holes 23b of the small face plate 23. After being rotated 90 degrees and then retracted again, the small face plate 23 is turned into the large face plate 27 with the fitting portions 40 fitted together as shown in FIG.
Of the small face plate 2a with a greater clamping force than the conventional clamp, without displacement.
Since the engaging portion 23c of No. 3 is pressed against the engaging portion 27b of the large face plate 27, a molding load (about 50 t) can be stably received, and the molding is stabilized.

As described above, the height position of the small face plate 23 attracted to the pressing contact surface 27a is determined by the small face plate 23 being pushed up by the hydraulic cylinder 34, and the locking portion 23c being moved to the large face plate 27.
Is adjusted to a fixed position by being pressed against the hooking portion 27b of the
9a is adjusted to a position where it can be inserted into the clamp hole 23b of the small face plate 23, whereby the positioning of the clamp holes 23b, 28 of the large and small face plates 23, 27 can be accurately performed.
The small face plate 23 can be positioned at the accurate clamping position of the large face plate 27.

Further, the small face plate 23, which is roughly disposed near the pressing face 27 a of the large face plate 27, is pulled or pulled toward or away from the pressing face 27 a by the contact / separation member 31, and the small face plate 23 is moved by the hydraulic cylinder 34. Of the clamp rod 29a of the clamp cylinder 29 and the small face plate 23
And the clamp rod 29a is fixed to the small face plate 23 by the clamp cylinder 29.
Of the small face plate 23 and the large face plate 2
7, the upper roll 21 can be automatically replaced without manual intervention. As a result, the upper roll replacement time can be reduced, and the number of workers can be reduced and work safety can be improved.

Although the present invention has been described with reference to the drawings, the present invention is not limited to this embodiment, and any change in design without departing from the gist of the present invention is included in the present invention. For example, in the embodiment, the contacting / separating means, the clamping means, and the position adjusting means are mounted on the large face plate. However, the present invention is not limited to this, and some or all of them may be mounted on the upper roll stand.

Further, in the embodiment, the pressing device for the upper roll axle box is mounted on the small face plate. However, the present invention is not limited to this. For example, it may be mounted on the upper portion on the large face plate side. Further, the contacting / separating means, the clamping means, and the position adjusting means are not limited to the structures of the embodiment, and may have any other structures as long as they can perform their respective functions. In particular, the position adjusting means may move not only the small face plate up and down but also move it in the left-right direction, or may move it up and down and move it in the left-right direction.

[0026]

In the squeeze roll stand according to the first aspect, the small face plate roughly arranged in the vicinity of the pressing face of the large face plate is drawn to the pressing face side of the large face plate by the contact / separation member of the contact / separation means. Or by adjusting the position of the faceplate by means of the position adjusting means, aligning the clamp member of the clamp means with the clamp hole of the faceplate, and inserting the clamp member into the clamp hole of the faceplate by the clamp means. do it,
Since the small face plate is clamped to the large face plate, the upper roll can be automatically replaced, shortening the upper roll replacement time, reducing the number of workers, and improving the safety of work.
In addition, the small face plate can be fixed to the large face plate with a large clamping force.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a large and small face plate of a squeeze roll stand according to one embodiment of the present invention.

FIG. 2 is an overall perspective view of a squeeze roll stand.

FIG. 3 is an exploded perspective view of a main part of the squeeze roll stand.

FIG. 4 is an enlarged perspective view of a main part including a partial cross-sectional view showing a state where a small face plate is arranged near a pressing surface of a large face plate.

FIG. 5 is an enlarged perspective view of a main part including a partial cross-sectional view showing a state after the position adjustment of the small face plate.

FIG. 6 is an enlarged perspective view of a main part including a partial cross-sectional view showing a clamp state of the small face plate to the large face plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Squeeze roll stand 11 Side roll stand 12 Notch 13 Lifting device 14 Lower roll 15 Lower roll shaft box 16 Left side roll 17 Right side roll 18 Left side roll shaft box 19 Right side roll shaft box 20 Pressure side device 21 Upper roll 22 Upper roll shaft box 23 Small face plate 23a Upper flange portion 23b Clamp hole 23c Hook portion 23d Projection piece 23e Double nut structure 23f Guide plate 24 Reduction device 24a Reducer 24b Electric motor 24c Output shaft 24d Pulley 24e Box bracket 24f Gear box 24g Pulley 24h Belt 24i Cylinder 24j Rod 25 Upper roll stand 26 Press-down device 26a Rod 27 Large face plate 27a Pushing surface 27b Hook 28 Clamp hole 29 Clamp cylinder 29a Clamp rod 30 Bracket 30a Notch 31 Contacting / separating member 31a Projection 32 Hydraulic cylinder 33 Rod 34 Hydraulic cylinder 35 Rod 36 Chopper conveyor 37 Cutter 38 ERW pipe 39 Cutter 40 Fitting part a ERW pipe manufacturing equipment line d Gap

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazunori Harada 46-46 Nakahara, Toba-ku, Kitakyushu-shi, Fukuoka Prefecture Within Nippon Steel Plant Design Co., Ltd. (72) Inventor Takenori Yukawa 46-46 Nakahara, Toba-ku, Kitakyushu-shi, Fukuoka 59 Nippon Steel Plant Design Co., Ltd. (56) References JP-A-59-199113 (JP, A) JP-A-62-270287 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) B21D 5/12 B21C 37/08 B23K 13/00

Claims (1)

(57) [Claims] 1. A squeeze roll stand in which a small face plate provided with an upper roll and a vertically movable upper roll axle box is removably pressed against a press contact surface of a large face plate. A contact / separation unit having a contact / separation member that pulls the roughly disposed small face plate toward or away from the pressing surface side of the large face plate, and a clamp that can be inserted into a predetermined number of clamp holes formed in the small face plate. A squeeze roll stand wherein a predetermined number of clamping means having members and a position adjusting means for the small face plate are provided on the large face side.