JP3428613B2 - Pipe end protection ring manufacturing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a pipe end protection ring attached to an end portion of a steel pipe (hereinafter, simply referred to as "pipe end").

[0002]

2. Description of the Related Art Medium- and large-diameter steel pipes used for line pipes for fluid transportation and the like are welded on-site. Therefore, if the pipe end, especially the beveled end (end portion that has been groove processed), is damaged during the transportation of the steel pipe, it will be difficult to perform the subsequent joining work. Therefore, an L-shaped cross section consisting of the body portion and the collar portion is formed. It is necessary to protect the pipe end protection ring by attaching it to the pipe end. Regarding the manufacturing apparatus of such a tube end protection ring and the method of attaching this ring, the applicant of the present invention has disclosed in Japanese Patent Application Laid-Open No. 7-3223.
No. 5 and Japanese Patent Application No. 7-6855.

[0003]

By the way, the pipe end protection ring is required to have a flange portion whose height varies depending on the wall thickness of the steel pipe and which has a flange portion suitable for the wall thickness of the steel pipe.
Therefore, the height of the collar portion of the ring material, which is formed into an L-shaped cross section by the forming device through the shear press, is
It is necessary to change according to the steel pipe information. However, the manufacturing apparatus of the pipe end protection ring (pipe end protector) described in Japanese Patent Application No. 7-6855 described above forms a collar portion having a constant height, assuming that the wall thickness of the steel pipe is constant. This is a simple disclosure of the device, but does not disclose anything about the fact that the height of the collar portion of the ring material can be arbitrarily changed.

According to the present invention, when a ring material having a constant width is used to form an L-shaped cross section by a forming device, the height of the flange portion to be formed can be arbitrarily changed. It is an issue.

[0005]

A pipe end protection ring manufacturing apparatus according to a first aspect of the present invention cuts a long strip-shaped ring material 2 into a predetermined length and cuts and raises the front and rear ends thereof for wedge driving. The shear press 6 for molding the portion 2a and the ring material 2 on which the cut-and-raised portion 2a has been molded have upper and lower end edges.
A material conveying device 8 that conveys the material in a state of being positioned, and a forming device 9 that forms the ring material 2 conveyed by the material conveying device 8 into an L-shaped cross section composed of a body portion 2c and a collar portion 2b. In the manufacturing apparatus of the tube end protection ring R, which is provided with a bending device 10 that bends the L-shaped ring material 2 into a predetermined ring diameter, the material transfer device 8 is configured to It has a support 20 which supports the lower end side edge, the beam forming unit 9, the switching
An annular recess 44 for releasing the raised portion 2a and a molding portion are provided.
A pair of forming rollers having an angle of the forming portion
The ring material 2 which becomes sharper in sequence from the side and is conveyed by the material conveying device 8 is passed through between each pair of rollers and L is gradually added.
A plurality of pairs of forming rollers 22 to 29, which are formed into a letter shape,
Supporting one end side edge of the plurality of sets of forming rollers pairs 22 to 29 to the through put was ring blank 2 and a forming guide 30 for causing the molding at a predetermined height position, this forming guide 30 characterized by comprising the said support 20 as possible elevation by the respective lifting drive means 31 and 32.

According to a second aspect of the present invention, in the apparatus for manufacturing a pipe end protection ring according to the first aspect, the forming guide 30 is used.
Also, each of the elevating and lowering driving means 31, 32 for elevating and lowering the support base 20 is characterized by comprising screw jacks 34, 40 interlockingly connected to the motors 35, 41.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a schematic perspective view briefly showing a pipe end protection ring manufacturing apparatus and its mounting apparatus, and FIG. 1B is a schematic perspective view of a lifter installation portion of a steel pipe manufacturing line. 2 and 3 are layout diagrams of FIG. 1 and FIG.
(C) is an explanatory view showing an example of a wedge driving device in a pipe end protection ring attachment device. First, with reference to these drawings, an outline of an apparatus for manufacturing a tube end protection ring and an apparatus for mounting the same will be described.

In the drawing, reference numeral 1 indicates a plurality of long strip-shaped ring materials 2 wound around a drum 3 so as to be rewound by a required length based on inner diameter information of a target steel pipe P flowing through a final step of a steel pipe manufacturing line L. It is an uncoiler installed on one side of the chain conveyor La in a row. 4 is a leveler for flattening the ring material 2 unwound from the uncoiler 1, and the ring material 2 flattened by the leveler 4
The roll feeder 5 provides a required amount of slack between the leveler 4 and the roll feeder 5, and then sends it to the shear press 6, where it is cut to a predetermined length and then wedged at its front and rear ends. Cut-and-raised part 2a for driving
[See FIG. 3C] is formed.

Reference numeral 7 denotes a transport table installed after the shear press 6 for receiving the ring material 2 cut by the shear press 6 and having the cut and raised portions 2a formed therein. Ring material 2 on this transport table 7
The material feeding device 8 arranged in parallel with the table 7 changes from the plain feeding which is carried with its back side facing downward to the vertical feeding which is carried with both side edges positioned vertically. After being inverted by 90 ° so as to become, it is sent to the forming device 9 in the next step, where the body portion 2c and the collar portion 2 are
and b are formed into an L-shaped cross section.

Reference numeral 10 is a bending device installed subsequent to the forming device 9 so that the ring material 2 formed in an L shape becomes a pipe end protection ring R having a predetermined ring diameter that matches the inner diameter of the target steel pipe P. It is to be bent into. In this embodiment, a tape applying device 12 for applying a tape 11 (see FIG. 4), which is a cushioning material, to the outer peripheral surface of the body 2c of the ring material 2 immediately before the ring material 2 is loaded into the bending device 10. The installed one is shown.

The pipe end protection ring R is manufactured by the manufacturing device including the above-described series of devices, and the pipe end protection ring R is taken out from the bending device 10 by the take-out / delivery device 13 to produce the steel pipe production line L. It is delivered to the conveying devices 14a and 14b installed across the sheet. These transfer devices 14a and 14b are arranged on both sides of the steel pipe manufacturing line L so that they can be moved toward and away from each other in accordance with the length of the target steel pipe P in order to mount the pipe end protection rings R on both pipe ends of the target steel pipe P. The ring mounting device 15a, 15 provided
The tube end protection ring R is stored while conveying the tube end protection ring R to the vicinity of the ring mounting devices 15a and 15b which are paired with b, respectively. In FIG. 1A, a motor 14 is used as the above-mentioned transfer devices 14a and 14b.
Although the structure which conveys the pipe end protection ring R is disclosed by rotating the screw shafts 14ab and 14bb in the forward and reverse directions by the aa and 14ba, this is an example, and for example, an endless chain conveyor is adopted. be able to.

Reference numerals 16a and 16b denote the transfer devices 14a and 14a,
14b is a delivery device that delivers the tube end protection ring R from the ring attachment devices 15a and 15b, and is attached integrally with the ring attachment devices 15a and 15b, for example.
The pipe end protection ring R received from the delivery devices 16a and 16b is attached to the pipe end of the target steel pipe P lifted by the lifter 19 at a predetermined position of the steel pipe production line L by the ring attachment devices 15a and 15b. Below these ring mounting devices 15a and 15b,
A wedge driving device 17 is installed, and a wedge 18 is driven into the cut-and-raised portion 2a of the pipe end protection ring R attached to the pipe end to expand the pipe end protection ring R, and a body portion 2c of the pipe end protection ring R. Is adhered to the inner peripheral surface of the pipe end via the tape 11 to completely mount the pipe end protection ring R on the pipe end.

FIG. 5 (A) is a schematic plan view showing a part of the material conveying device 8 and the forming device in the pipe end protection ring manufacturing apparatus, and FIG. 5 (B) is a schematic front view thereof. On the left side of each of FIGS. 5A and 5B,
A support base 20 for supporting the lower end side edge of the ring material 2 which is conveyed in a state in which both end side edges are vertically positioned in the material transfer device 8, and side plates 21a, 21b arranged along both sides of the support base 20. Indicates. In addition, the same figure (A) and (B)
The forming device 9 is shown on the right side of each of the rollers, and the forming device 9 passes the ring material 2 conveyed by the material conveying device 8 between each pair of rollers and gradually forms L.
A plurality of pairs of forming rollers 22 each of which is formed into a letter shape.
To 29 and a forming guide 3 for supporting the upper end side edge of the ring material 2 which is passed through the plurality of pairs of forming rollers 22 to 29 and performing forming at a predetermined height position.
It has 0 and. Then, the supporting table 20 of the material conveying device 8 and the forming guide 3 of the forming device 9
0 can be moved up and down by the elevating and lowering driving means 31 and 32 in a horizontal posture.

FIGS. 6A and 6B show the support base 20.
FIG. 3 is a vertical sectional side view and a vertical sectional front view showing the mounting structure of FIG. 1, in which the lifting drive means 31 is composed of a plurality of screw jacks 34 installed on a pedestal 33. The screw jacks 34 raise and lower the support base 20 in a horizontal state. Supported as possible. These screw jacks 34 are linked to a motor 35 and are driven up and down by the rotation of the motor 35. Further, as shown in FIG. 6A, the support base 20 is vertically guided along the guide plates 36a, 36a on both sides.

7 (A) and 7 (B) are a vertical sectional front view and a side view of the forming device 9, showing a mounting structure of the forming guide 30. As shown in FIG. As can be seen from these figures, the plurality of sets of forming roller pairs 22 to 29 are arranged on the device base 37 along the longitudinal direction thereof, and the forming guide 30 includes the plurality of sets of forming roller pairs 22 to 29. Ring material 2 threaded through 29
These forming roller pairs 22-2 to support the upper edge of
The forming guide 30 is arranged so as to sew between 9 and 9 and the forming guide 30 is moved up and down by a lifting drive means 32.
It is supported horizontally so that it can be raised and lowered via. The lifting drive means 32 comprises a plurality of screw jacks 40 installed on the support frame 39.
Is linked to a motor 41 and is driven up and down by the rotation of the motor 41. Although not shown, the forming guide 30 contacts the upper edge of the ring material 2 via a bearing. Incidentally, FIG.
In (A), reference numeral 42 denotes an elevating rod that is vertically installed on the elevating bar 38, and is slidably fitted to the guide cylinder 43 on the support frame 39 side.

The pair of forming rollers 22 to 29 are shown in FIG.
As shown in (A), (B) and FIG. 7 (A), a pair of forming rollers 22a, 22b to 22b that insert the ring material 2 conveyed by the material conveying device 8 to perform molding.
9a and 29b, the first forming rollers 22a and 22b on the inlet side have a gentle forming angle of about 30 ° on the lower end side of the rollers as shown in FIG. The angle gradually becomes sharper in order, and so on, and in the final forming rollers 29a and 29b on the exit side, the angle of the forming portion is 90 °. Therefore,
The ring material 2 passed through the pair of forming rollers 22 to 29 is formed step by step from the first forming rollers 22a and 22b to the last forming rollers 29a and 2b.
By passing through 9b, the flange portion 2b is formed into an L-shaped cross section forming a 90 ° right angle to the body portion 2c.

In FIG. 8, the ring material 2 is sent to the forming device 9 with its lower side edge supported by the support base 20 of the material conveying device 8 and the first forming roller 22a,
22b shows a state in which it is sequentially passed through a subsequent forming roller from 22b and finally formed into an L-shaped cross section. In this case, the ring material 2 passing through the forming roller pairs 22 to 29
The position of the lower end side edge of the ring material 2 is determined by the height position of the support base 20 of the material transfer device 8, and the upper end side edge of the ring material 2 is supported by the forming guide 30. The cross-section is formed into an L-shape at the height position set by the platform 20, and the collar portion 2b at this time is formed.
Has a height h1 as shown in the figure. The forming roller 2
2a to 29a are each formed with an annular recess 44 for allowing the cut-and-raised portion 2a formed in the ring material 2 to escape.

However, when the height of the flange portion 2b of the ring material 2 is formed to be h2 shorter than the height h1 by the above-mentioned forming process, the forming roller pairs 22 to 29 are arranged at fixed positions. Therefore, the height h of the support base 20 of the material transfer device 8 indicated by the one-dot chain line in FIG.
2 is moved up to a position indicated by a chain double-dashed line in the same figure by an amount f corresponding to 2, and at the same time, the forming guide 30 shown by a solid line in FIG.
The ring material 2 formed in the L-shaped cross section by raising the same amount f as the rising amount f of FIG. It becomes h2. In this case, since the support base 20 and the forming guide 30 are moved up and down by the screw jacks 34 and 40 driven by the motors 35 and 41, the support base 20 and the forming guide 30 are measured by measuring the rotation amounts of the screw shafts of the screw jacks 34 and 40. It is possible to easily set the rising amounts of the 20 and the forming guide 30.

As mentioned at the beginning, the pipe end protection ring R
The height of the collar 2b varies depending on the wall thickness of the steel pipe,
Since a material suitable for the wall thickness of the steel pipe is required, the height of the flange portion 2b of the ring material 2 formed by the forming device 9 into an L-shaped cross section needs to be changed appropriately according to the steel pipe information. . Therefore, in this pipe end protection ring manufacturing apparatus, the support base 20 of the material conveying device 8 and the forming guide 30 of the forming device 9 can be arbitrarily moved up and down by the elevating drive means 31, 32, especially the screw jacks 34, 40. Therefore, the height of the collar portion 2b of the ring material 2 can be changed quickly, easily and accurately based on the steel pipe information at the site.

9 (A) and 9 (B), the height of the flange portion 2b of the pipe end protection ring R differs depending on the wall thickness of the steel pipe P, which is suitable for a thick steel pipe P. The pipe end protection ring R having a flange height h1 and the pipe end protection ring R having a flange height h2 suitable for the thin steel pipe P are attached to the pipe ends. .

Returning to FIGS. 1 and 2, the tube end protection ring R
As a supplementary description of the attachment device, the take-out / delivery device 13 may have any configuration as long as it can take out the pipe end protection ring R on the bending device 10 and deliver it to the transport devices 14a and 14b. Here, the rails 13 installed side by side on the steel pipe manufacturing line L
Disclosed is an arm 13c that extends and contracts toward a steel pipe manufacturing line L extending on a carriage 13b that moves on a, and a holding claw 13d of a pipe end protection ring R is attached to the tip of the arm 13c so as to be able to move up and down. There is.

The transfer devices 16a and 16b are also provided.
Similarly to the take-out / delivery device 13, the carrying device 1
Any structure may be used as long as the pipe end protection ring R on the 4a and 14b can be taken out and delivered to the mounting devices 15a and 15b. Here, the mounting devices 15a and 15b are attached to the arms 16ab and 16bb, respectively, which are provided at their tips so as to be capable of moving up and down with sandwiching claws 16aa and 16ba.
A rotatably mounted one is disclosed.

The mounting devices 15a and 15b may have any structure as long as the pipe end protection ring R received from the transfer devices 16a and 16b can be mounted on the target steel pipe P. Here, a plurality of holding pins 15aa, 15ba fitted in the inner peripheral portion of the tube end protection ring R are provided in a circular shape so as to project, and these holding pins 15aa, 15ba are configured to be movable in a radial direction. It discloses that R can always be held concentrically regardless of its diameter. Then, such a plurality of holding pins 15a
By configuring the main bodies 15ab and 15bb provided with a and 15ba protruding toward and away from the pipe end of the target steel pipe P,
It discloses that the pipe end protection ring R is attached to the pipe end of the target steel pipe P. In addition, the mounting devices 15a, 15b,
It goes without saying that a mechanism for positioning the tube end protection ring R to be held is provided.

Further, the wedge driving device 17 is provided with a cut-and-raised portion 2 of the pipe end protection ring R which is positioned and mounted at a predetermined position with respect to the target steel pipe P by the mounting devices 15a and 15b.
Any configuration may be used as long as the pipe end protection ring R can be expanded in diameter by driving the wedge 18 into a. Here, as shown in FIG. 3, a slide base 17b that horizontally moves toward the pipe end of the target steel pipe P by the first cylinder 17a, and a wedge hammering air hammer 17c that is horizontally attached to the lower surface of the slide base 17b. And wedge 18
It is disclosed that it is configured with a case 17d for housing the. The slide base 17b is guided by a guide rail (not shown), and the wedge driving device 17 is raised and lowered as a whole by raising and lowering means (not shown) so that the relative height position with respect to the mounting devices 15a and 15b can be adjusted. Further, the wedge driving device 17 is, as shown in FIG.
It is advisable to use a mechanism that rotates 90 ° in the vertical direction, inverts it, and also performs swaging after hammering.

[0025]

According to the pipe end protection ring manufacturing apparatus of the first aspect of the present invention, the support base for supporting the lower end side edge of the ring material conveyed by the material conveying device and the forming device through the plurality of forming roller pairs. The forming guide for supporting one end side edge of the ring material to be inserted and performing molding at a predetermined height position can be moved up and down by the elevating and lowering drive means. When forming the L-shaped cross section, the height of the collar portion of the ring material is desired based on the steel pipe information by raising or lowering the support base and the forming guide by the same amount by the respective lifting drive means. Can be changed to.

According to the second aspect of the present invention, since each elevating and lowering driving means for elevating and lowering the forming guide and the support base comprises a screw jack linked to a motor, the height of the collar portion of the ring material can be made quick and easy. And can be changed accurately.

[Brief description of drawings]

FIG. 1A is a schematic perspective view briefly showing a pipe end protection ring manufacturing apparatus and a mounting apparatus thereof, and FIG. 1B is a schematic perspective view of a lifter installation portion of a steel pipe manufacturing line.

FIG. 2 is a layout diagram of FIG.

3 (A) to (C) are explanatory views showing an example of a wedge driving device in the pipe end protection ring attachment device.

FIG. 4 is a cross-sectional view showing a state in which a pipe end protection ring is attached to a steel pipe.

5A is a schematic plan view showing a part of a material conveying device and a forming device in a pipe end protection ring manufacturing apparatus, and FIG. 5B is a schematic front view thereof.

FIG. 6A is a vertical sectional side view showing a mounting structure of a support base, and FIG. 6B is a vertical sectional front view.

FIG. 7A is a vertical sectional front view of the forming device,
(B) is a side view thereof.

FIG. 8 is an enlarged explanatory view showing a part of a pair of molding rollers.

9 (A) and 9 (B) are cross-sectional views showing a mounted state of a tube end protection ring in which a flange height is different depending on the thickness of a steel tube.

[Explanation of symbols]

2 Ring material 2a Cut-and-raised part 2b Collar part 2c Body part 6 Shear press 8 Material transfer device 9 Forming device 10 Bending device 17 Wedge driving device 18 Wedge 20 Supports 22-29 Forming roller pair 30 Forming guide 31 Elevating drive means 32 Lifting / driving means 34 Screw jack 35 Motor 40 Screw jack 41 Motor P Steel pipe R Pipe end protection ring

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroji Okada 1-9-1, Jokoji, Amagasaki City, Hyogo Prefecture Inside Osaka Osaka Industrial Co., Ltd. (72) Inventor Toshinari Sato 1-9-1, Jokoji, Amagasaki City, Hyogo Prefecture Issue: Osaka Osaka Fuji Kogyo Co., Ltd. (56) Reference JP-A-8-200589 (JP, A) JP-A-59-183936 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) B23P 13/00 B21D 5/08 B65D 59/02 F16L 57/00

Claims (2)

(57) [Claims] 1. A shear press for cutting a long strip-shaped ring material into a predetermined length, and forming cut-raised portions for wedge driving at the front and rear ends thereof, and a ring material having the cut-raised portions formed. A material conveying device that conveys the material in a state where both end side edges thereof are vertically positioned; and a forming device that forms the ring material conveyed by the material conveying device into an L-shaped cross section including a body portion and a collar portion, in the manufacturing apparatus of the pipe end protection ring with a bending device for the bent and has been ring blank formed into the L-shape in a predetermined ring diameter, the material conveying apparatus, the lower end side edge of the ring blank being conveyed a support base for supporting the said forming device, the cutting force
A molding roll having an annular recess for allowing the strained portion to escape and a molding portion.
Roller pair, and the angle of the molding part is sharper from the inlet side.
As a result , the ring material conveyed by the material conveying device is passed between each pair of rollers, and a plurality of pairs of forming rollers are formed to form an L-shape in stages, and the pair of forming rollers is inserted into the pair of forming rollers. a forming guide for causing molding at a predetermined height position obtained by supporting one end side edge of the ring blank, that the said support base and the forming guide made as a vertically movable by respective lifting drive means Characteristic pipe end protection ring manufacturing equipment. 2. The apparatus for manufacturing a pipe end protection ring according to claim 1, wherein each of the elevating and lowering driving means for elevating and lowering the forming guide and the support base comprises a screw jack interlocked with a motor. .