JPH08132134A - Inner roll type machine for forming electric resistance welded tube - Google Patents

Abstract

PURPOSE: To provide an inner roll type electric resistance welded tube forming machine capable of stably, safely, easily and rapidly achieving the roll exchanging work on the off-line mode, and facilitating the assembling work in on-line. CONSTITUTION: An inner roll type electric resistance welded tube forming machine 10 is provided with a forming stand 11 and an assembled roll structural body 13 which is loaded on a moving truck 12 to be advanced/retracted into/ from the forming stand 11 and bends and forms the electric resistance welded tube from a thin plate. The assembled roll structural body 13 is fitted to a connecting member 60 protruded attachably/detachably to/from each end part of the moving truck 12 via through holes 23a-26a formed in the respective shaft boxes 23-26 so that upper and lower rolls 19, 22 are elevatable, and right and left side rolls 20, 21 are attachable/detachable to/from each other by a prescribed width. A movable projection 68 to support the upper roll shaft box 23 attachably/detachably by movable means 71, 73, 92 is provided on the connecting member 60, and a side roll supporting part 64 to support right and left side roll shaft boxes 24, 25 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner roll type electric resistance welded pipe forming machine. More specifically, it is possible to perform roll exchange work offline in a stable and safe manner, and easily and quickly. The present invention relates to an inner roll type electric resistance welded pipe forming machine that can be easily manufactured.

[0002]

2. Description of the Related Art For example, electric resistance welded pipes such as pipes for water pipes and gas pipes and ventilation ducts are manufactured by continuously bending a strip-shaped thin plate derived from an uncoiler into a circular cross section or a rectangular cross section, and then abutting portions. It is manufactured by welding and cutting it to a predetermined length. In this ERW pipe manufacturing line, a predetermined number of ERW pipe forming machines incorporating a roll assembly having a plurality of forming rolls for bending a thin plate are arranged upstream and downstream of the welding device. Has been done. By the way, since there are many kinds of sizes and shapes of electric resistance welded pipes manufactured by the electric resistance welded pipe manufacturing line, the molding rolls incorporated in the electric resistance welded pipe molding machine must be replaced accordingly. This roll replacement is a large-scale work using an overhead crane and requires a relatively long work time.
If this is done inside the electric resistance welded pipe forming machine (online), the productivity is greatly reduced.

Therefore, as a conventional technique for solving this problem, Japanese Patent Publication No. 58-5584 filed by the applicant of the present invention is proposed.
As described in "Inner stand type rolling mill" in Japanese Patent No. 6, a movable carriage on which the assembled roll structure is mounted is pulled out (offline) from the forming stand installed on the electric resistance welded pipe manufacturing line. Instead of this, an inner roll type electric resistance welded pipe forming that performs roll replacement of the forming roll by transferring the set roll structure, in which a new forming roll is assembled, into the forming stand using another moving carriage and setting it. Machine is being developed. The paired roll structure consists of upper and lower rolls,
It consists of left and right side rolls and an inner stand to which these rolls are assembled.When replacing an old forming roll that has been pulled out, pull up the upper roll from inside the inner stand using an overhead crane, etc., then pull out the left and right side rolls. Then remove the inner stand on the trolley, and finally lift and remove the lower roll, and then assemble a new forming roll on the trolley in the reverse order.

[0004]

However, in the conventional inner roll type electric resistance welded pipe forming machine, a large inner stand having a weight of 4 to 5 tons is required when the forming roll pulled out from the forming stand is replaced. Since it has to be attached to and detached from the movable carriage, and this large-scale work is added, there is a problem that the roll replacement work is dangerous and takes time. In addition, when removing the left and right side rolls from the inner stand, the cotter that presses the sliding protrusions formed on the outer surfaces of the left and right side roll shaft boxes horizontally from above is used by the operator. However, there is a problem in that the work is troublesome and the left and right side rolls are slid depending on how the cotter is inserted.

The present invention has been made in view of the above circumstances, and the off-line roll exchanging work of the inner roll type electric resistance welded pipe forming machine can be performed stably and safely, easily and quickly, and the online assembling work is easy. It is an object of the present invention to provide an inner roll type electric resistance welded pipe forming machine that can be used.

[0006]

A method according to the above-mentioned object.
The inner roll type electric resistance welded pipe forming machine described is mounted on a forming stand arranged on a line of an electric resistance welded pipe manufacturing facility and a moving carriage that is put in and taken out of the forming stand to bend the electric resistance welded pipe from a thin plate. An inner roll type electric resistance welded pipe forming machine having a set roll structure to be formed, wherein the set roll structure is attached to a connecting member detachably provided at both ends of the movable carriage, and each shaft is attached to the connecting member. The upper and lower rolls are mounted so as to be able to move up and down through a through hole formed in the box, and the left and right side rolls are attached to and separated from each other by a predetermined width. A movable projection that supports the axle box in a detachable manner is provided, and a side roll support portion that supports each of the left and right side roll axle boxes is provided.

The inner roll type electric resistance welded pipe forming machine according to a second aspect is the inner roll type electric resistance welded pipe forming machine according to the first aspect, wherein the side roll support portion penetrates the left and right side roll shaft boxes. The projection is configured to be removably fitted in the hole.

Further, the inner roll type electric resistance welded pipe forming machine according to claim 3 is mounted on a forming stand arranged on the line of the electric resistance welded pipe manufacturing equipment and a movable carriage that is put in and taken out from the forming stand. An inner roll type electric resistance welded pipe forming machine provided with a combination roll structure for curving an electric resistance welded pipe from a thin plate, wherein the combination roll structure is detachably provided at both ends of the movable carriage. The upper and lower rolls are attached to the connecting member via the through holes formed in the respective axle boxes so that the upper and lower rolls can be moved up and down. It is configured to provide a movable protrusion for supporting the.

Furthermore, an inner roll type electric resistance welded pipe forming machine according to a fourth aspect is the inner roll type electric resistance welded pipe forming machine according to any one of the first to third aspects, in which the movable protrusion is It is configured to be a rotation protrusion that can be stored on the side of the connecting member.

An inner roll type electric resistance welded pipe forming machine according to a fifth aspect is the inner roll type electric resistance welded pipe forming machine according to any one of the first to fourth aspects, in which the movable means of the movable protrusion is movable. Is provided on the movable protrusion side, an elevating rail of the moving carriage arranged at the installation part of the forming stand, an elevating means for elevating the elevating rail until the assembled roll structure reaches the electric resistance welded pipe forming position. Input child,
It is provided on the side of the molding stand, and is configured to have a retaining member that can be attached to and detached from the input element.

An inner roll type electric resistance welded pipe forming machine according to a sixth aspect of the present invention is mounted on a forming stand provided on a line of an electric resistance welded pipe manufacturing facility and a movable carriage that is put in and taken out of the forming stand. An inner roll type electric resistance welded pipe forming machine having a combination roll structure for bending an electric resistance welded pipe from a thin plate, wherein the combination roll structure is removably inserted into a through hole formed in a shaft box. The upper and lower rolls can be moved up and down, and the left and right side rolls can be moved to and from each other by a predetermined width via a connecting member that is connected between the lower roll shaft box and the left and right side roll shaft boxes. A liner is provided between the roll shaft box and the left and right side roll shaft boxes so as to keep the axial distance between the upper and lower rolls constant even after the rolls are recombined into different diameter rolls.

Further, the inner roll type electric resistance welded pipe forming machine according to claim 7 is mounted on a forming stand arranged on a line of an electric resistance welded pipe manufacturing facility and a movable carriage which is put in and out of the forming stand. An inner roll type electric resistance welded pipe forming machine provided with a combined roll structure for curving an electric resistance welded pipe from a thin plate, wherein the combined roll structure penetrates a lower roll shaft box and / or an upper roll shaft box. The upper and lower rolls are connected so as to be able to move up and down through a connecting member that is inserted into and removed from the hole. It is configured to provide a liner that keeps the distance constant.

Furthermore, an inner roll type electric resistance welded pipe forming machine according to an eighth aspect is the inner roll type electric resistance welded pipe forming machine according to any one of the first to seventh aspects, It is constructed so that it can be raised and lowered by a stand raising and lowering means.

[0014]

In the inner roll type electric resistance welded pipe forming machine according to any one of claims 1 to 5, when the roll is reassembled, the upper roll is temporarily pulled up together with the upper roll shaft box in the forming stand, and then the movable protrusion is moved by the movable means. After projecting, the upper roll and the upper roll shaft box are placed on the movable protrusion, and in this state, the assembled roll structure is pulled out from the forming stand by the moving carriage. After that, a new set roll structure on standby may be transferred and incorporated into the forming stand, or the set roll structure pulled out may be disassembled offline and replaced with a new roll, and then returned to the forming stand. Good.
In addition, in order to incorporate the assembled roll structure online, that is, in the forming stand, after pulling up the upper roll together with the upper roll shaft box, the movable projection is pulled in by the movable means, and then the upper roll and the upper roll shaft box are set to the predetermined positions. Since it only has to be lowered to the height position, it is possible to facilitate the online assembling / removing work of the group roll structure in combination with the above-described projecting operation of the movable projection at the time of removal from the online.

According to the first aspect of the present invention, since the rolls of the assembled roll structure are exchanged, the rolls are attached to the connecting member which is attachable to and detachable from the moving carriage through the through holes of the axle boxes. In case of inner roll type electric resistance welded pipe forming machine, upper roll, left and right side rolls,
Remove the connecting member and the lower roll in this order, and replace the new roll in the reverse order with the lower roll on the moving carriage, the connecting member on the moving carriage through the through hole of the lower roll shaft box, and the left and right side rolls. The inner roll according to claim 3, wherein the upper roll is mounted on the side roll supporting portion of the connecting member via the through holes of the left and right side roll shaft boxes, and the upper roll is mounted on the movable protrusion of the connecting member via the through hole of the upper roll shaft box. When changing the roll of the roll-type electric resistance welded pipe forming machine, the upper roll, the connecting member, and the lower roll are removed in this order, and the assembly is performed in the reverse order. Roll replacement work can be performed stably and safely, and easily and quickly.

Particularly, in the inner roll type electric resistance welded pipe forming machine according to the second aspect, when the assembled roll structure is moved by the moving carriage, the left and right members mounted on the connecting member so as to be able to come into contact with and separate from each other by vibration during movement. Although the side rolls rattle, the protrusions of the side roll support portions are fitted into the through holes of the left and right side roll shaft boxes, so that rattling can be prevented and stable transfer can be performed.

In the inner roll type electric resistance welded pipe forming machine according to the present invention, when the movable roll is released from the supporting set or supporting state of the upper roll shaft box, the movable protrusion rotates to project from the connecting member side. Since it is housed, the support set and the support release of the upper roll shaft box can be performed by a smooth operation with a simple structure.

In the inner roll type electric resistance welded pipe forming machine according to a fifth aspect of the present invention, the elevating means pulls down the elevating rail to lower the assembled roll structure mounted on the moving carriage to the electric resistance welded pipe forming position. Since the input element hooked by the hooking member is pulled up and the turning projection is turned in the housing direction, the online assembling work is further facilitated.

In the inner roll type electric resistance welded pipe forming machine according to the sixth and seventh aspects, even if vibration occurs when the movable roll truck moves the combined roll structure, the combined roll structure is configured through the connecting member. Since the rolls are connected so as to be movable with respect to each other, the rolls are prevented from collapsing and fall, and even after the rolls having different diameters are combined, in the case of claim 6, the lower roll shaft box and the left and right side roll shaft boxes are Between the upper roll shaft box and the left and right side roll shaft boxes, the liner is arranged between the upper and lower roll shaft boxes in the case of claim 7, so that the axial center distance between the upper and lower rolls is constant. Can hold

In the inner roll type electric resistance welded pipe forming machine according to the eighth aspect, the forming stand is integrally raised and lowered by the stand raising and lowering means. The combined roll structure can be integrally raised and lowered according to the vertical movement of the sewing pipe manufacturing line.

[0021]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. In the figure, the length direction of the ERW pipe production line is X.
Direction, the direction orthogonal thereto is the Y direction, and the vertical direction is the Z direction. FIG. 1 is an overall side view showing the assembled roll structure of an inner roll type electric resistance welded pipe forming machine according to the first embodiment of the present invention, and FIG. 2 shows the assembled roll structure of the same. FIG. 3 is a side view showing the same, FIG. 3 is a perspective view showing a mechanism for taking in and out the group roll structure, FIG. 4 is an enlarged vertical sectional view thereof, FIG. 5 is an enlarged transverse sectional view thereof, and FIG. 6 is an enlarged side view of the group roll structure.
7 is an enlarged front view of the assembly roll structure, FIG. 8 is a plan view of the assembly roll structure, FIG. 9 is an enlarged front view of the upper portion of the connecting member, FIG. 10 is an enlarged rear view of the upper portion of the connecting member, and FIG. An enlarged side view showing a combined roll structure of an inner roll type electric resistance welded pipe forming machine according to a second embodiment of the present invention, FIG. 12 is an enlarged front view of the combined roll structure, and FIG. FIG. 14 is a side view showing an assembled state, FIG. 14 is a partially enlarged side view of a combined roll structure of an inner roll type electric resistance welded pipe forming machine according to a third embodiment of the present invention, and FIG. 15 is an enlarged side view of a main part of a connecting member. FIG. 16 is an enlarged transverse cross-sectional view of a main part of a connecting member, FIG. 17 is an enlarged side view of a combined roll structure of an inner roll type electric resistance welded pipe forming machine according to a fourth embodiment of the present invention, and FIG. 18 is a combined roll. 19 is an enlarged front view of the structure, FIG. 19 is an enlarged cross-sectional view of the same, and FIG. 20 is a fifth embodiment of the present invention. Enlarged side view of the assembled roll structure of the inner roll type electric-resistance-welded pipe forming machine that, FIG. 21 is an enlarged front view of the assembled roll structure, FIG 22 is a side view showing a built-in state of the same set roll structure.

First, an inner roll type electric resistance welded pipe forming machine according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, an inner roll type electric resistance welded pipe forming machine 10 according to the first embodiment of the present invention includes a forming stand 11 disposed on an electric resistance welded pipe manufacturing facility line a, and a forming stand 11 inside the forming stand 11. Mounted on the moving carriage 12 that is taken in and out,
And a roll assembly 13 for bending an electric resistance welded tube from a thin plate.

The molding stand 11 has four side pillars 72, and a gate-shaped lifting casing 101 which can be lifted and lowered by the stand lifting and lowering means 100 is arranged inside thereof.
On the upper plate of the elevating casing 101, a pressure reducing device 11a including a pair of front and rear screw jacks is provided.
At the lower part of the molding stand 11, a press-up device 11b including a pair of front and rear screw jacks is provided. A load cell 11c with a flange is attached to the tip of the rod of the reduction device 11a (see FIG. 4).
At the front and rear portions of the moving carriage 12, there are disposed uplifting rods 12a that are moved up and down by the rods 11d of the uplifting device 11b to move up and down to push up or release the downroll shaft box 26 (FIG. See also 4).

As shown in FIGS. 1 to 4, a molding stand 11
At the installation portion of the mounting base 90, a mounting base 90 in which the uplifting device 11b is embedded is arranged in the central portion.
In the groove formed on the upper surface of both ends of the Y
An elevating rail 91 extending in the direction is stored so as to be able to elevate. In addition, a plurality of short hydraulic cylinders 92, which is a component of a movable means for moving up and down the lifting rail 91, are erected on the installation portion of the molding stand 11, and these rods 92a can be simultaneously taken in and out. As a result, the pair of elevating rails 91 are horizontally moved up and down synchronously.

As shown in FIGS. 1, 2 and 4, the stand raising / lowering means 100 is erected on the installation portion of the molding stand 11, and the rod casing 102 is moved in and out to raise and lower the casing 1.
01 has four screw jacks 102 for moving up and down.
A reduction gear 104 connected to the reduction motor 103
A long synchronous shaft 105 connected to the power transmission unit is connected so that power can be transmitted. Synchronous shaft 1 by deceleration motor 103
When the rod 05a is rotated and the rods 102a of the respective screw jacks 102 are taken in and out, these rods 102a
The elevating casing 101 placed on the upper side via the lower end projecting piece 101a is moved up and down by using the four side columns 72 forming the forming stand 11 as guides. Therefore, the assembled roll structure 13 after being incorporated online and integrated with the elevating casing 101 has the screw jack 102.
Elevating casing 10 by moving rod 102a in and out
Go up and down with 1.

Further, as shown in FIGS. 1 and 4, the upper and lower portions of the working side end portions of the both side plates of the elevating casing 101 are respectively moved to predetermined heights by the press up and down devices 11a and 11b. Upper and lower clampers 110 and 111 for clamping the positioned upper and lower roll shaft boxes 23 and 26 from both sides are attached. Upper and lower clampers 110, 111
Has a casing 112 that is fixed to both side plates of the elevating casing 101 and has an opening on the side of the respective axle boxes 23, 26. The clamp plate 113 is housed in the casing 112 so that it can be taken in and out. There is. Also,
A pair of clamp cylinders 1 is provided on the end surface of the casing 112.
14 is attached, and the clamp plate 113 is moved in and out by simultaneously moving the rods 114a in and out.

Further, as shown in FIGS. 4 and 5, left and right side roll shaft boxes installed on-line so as to straddle the side columns 72 of the forming stand 11 on both sides of the central portion of both side plates of the elevating casing 101. 24, 25 sliding protrusions 24
A cotter device 115 is attached to hold b and 25b so as to be horizontally slidable from above. Cotter device 115
The cotter 117 having substantially the same shape is housed in a deformed U-shaped casing 116 that houses a part of the side column 72 in a plan view so that the cotter 117 can be taken in and out.
A pair of loading / unloading cylinders 118 are attached to the end faces of 16. By simultaneously moving the rods 118a in and out, the cotter 117 is moved in and out of the sliding protrusions 24b, 25b of the left and right side roll shaft boxes 24, 25.

Further, on both side plates of the elevating casing 101, the rotary shaft 19a of the upper roll 19 is provided at the upper and lower parts of the drive side end thereof through a connecting structure 80 having a different structure.
And a drive spindle 81 connected to the rotary shaft 22a of the lower roll 22 are swingably attached, and a drive side pressure side device 82 is provided at an intermediate position between both connecting structures 80.
Are horizontally mounted on the drive-side ends of both side plates of the elevating casing 101. On the other hand, the pressure side device 83 on the working side is provided so as to be able to move up and down by an elevating mechanism 85 attached to the elevating casing 101.

As shown in FIGS. 1, 2, and 4, the lifting mechanism 85
Has a long hydraulic cylinder 87 that is erected on the upper working side of the lifting casing 101 via a horizontally-folded gate-shaped bracket 86, and works on both ends of the bracket 86 and both side plates of the lifting casing 101. A pair of Zs are formed between the brackets 88 protruding outward from the intermediate portions of the side end portions, respectively.
Rails 89 are installed in parallel. A pressure side device 83 is horizontally laid between these Z rails 89 so as to be able to move up and down, and a rod 87a of the hydraulic cylinder 87 is fixed to the upper surface of the pressure side device 83. Rod 8 of hydraulic cylinder 87
Pressure side device 8 on the working side by moving 7a in and out
3 moves up and down along the Z rail 89.

The movable carriage 12 may be a self-propelled carriage or a towing type carriage that moves by moving the rod 12c of the long hydraulic cylinder 12b in and out, as shown in FIG. The moving carriage 12 is pulled out from the elevating rail 91 in the molding stand 11 along the loading / unloading rail 14 extending outward on the working side, and after getting on the empty rail 17a of the rearrangement carriage 17, the hydraulic cylinder 15 is long in the X direction. The other rail 17b of the rearrangement carriage 17 is connected to the take-in / out rail 14 by pulling in the rod 16 of the other moving carriage 1 and then the new moving carriage 1 on the other rail 17b.
2 moves to the forming stand 11 side, and a new set roll structure 13 is incorporated in the forming stand 11. The assembled state is shown in FIG.

As shown in FIGS. 1, 5 and 6, the combined roll structure 13 includes an upper roll 19, left and right side rolls 20, 21 and a lower roll 22 which constitute a forming roll, a pair of upper roll shaft boxes 23, Left and right side roll shaft boxes 24, 25, a pair of lower roll shaft boxes 26, and projecting detachably at both ends of the moving carriage 12, each of the shaft boxes 23 to 26 is inserted through the through holes 23a to 26a. It has a pair of thick-walled plate-like connecting members 60 which are vertically movably connected. The left and right side roll shaft boxes 24, 25 have through holes 24a, 25a.
Is formed by cutting the central portions of the respective sliding protrusions 24b, 25b wider than the connecting member 60 so as to form groove-shaped through holes 24a, 2b.
5a. The reason why the notch is wide is that the left and right side rolls 20 and 21 can be moved to the electric resistance welded pipe forming position by the pressure side devices 82 and 83. In addition, on the upper surface of the upper roll shaft box 23, a pair of locking metal fittings 23 for locking the flange of the load cell 11c of the reduction device 11a.
b is fixed.

As shown in FIG. 6, each connecting member 6
0 is a pedestal 61 fixed on both ends of the moving carriage 12.
Is vertically attached via a pin 62, and the lower roll shaft box 26 is mounted on a pedestal 61. Further, on both sides of the intermediate portion of the connecting member 60, protruding side roll support portions 64 for mounting both side portions of the sliding protrusions 24b, 25b of the left and right side roll shaft boxes 24, 25 are integrally formed. . The through holes 24a and 25a formed in the left and right side roll shaft boxes 24 and 25 are holes wider than the connecting member 60 as described above, and are detachably fitted into the lower portions of the through holes 24a and 25a. Protruding part 6
4 a is integrally formed on the upper surface of the base portion of the side roll support portion 64. Next, the mounting structure of the upper roll shaft box 23 to the connecting member 60 will be described with reference to FIGS.

As shown in FIGS. 7, 9 and 10, the connecting member 6
An inverted L-shaped groove portion 65 is formed inside the tip portion of 0. A hole 66 is formed in the portion of the connecting member 60 facing the lower end of the groove 65, and the pin 6 is formed in the hole 66.
A movable projection 68 that rotatably supports the upper roll shaft box 23 downwardly is rotatably attached via the shaft 7.

An elongated hole 69 is formed on the base side of the movable protrusion 68, and a movable protrusion 68 which constitutes a movable means is housed in the groove 65 so as to be vertically movable via a pin 70 loosely inserted therein. A vertically long hook 71, which is an example of the input device on the side,
The movable protrusion 68 is connected. An upper portion of the hook 71, which serves as a hooking portion, projects from the upper end of the connecting member 60, and this upper portion is hooked online by a hooking member 73 that is fixed to the upper portion of the elevating casing 101 and constitutes a movable means. (See Figure 4). When the hook 71 is moved up and down, the movable projection 68 connected by the pin 70 is vertically rotated about the pin 67 by 90 degrees, and the movable projection 68 is taken in and out from the upper roll shaft box 23 side.

In FIG. 4, reference numeral 101b is a sliding groove formed in the inner surface of the central portion of both side plates of the elevating casing 101 and extending in the horizontal direction.

Next, the operation of the inner roll type electric resistance welded pipe forming machine 10 according to the first embodiment of the present invention will be described. When the rolls are replaced, first, as shown in FIG. 4, the clamp plates 113 are pulled back by the respective clamp cylinders 114 of the upper and lower clampers 110 and 111 to move the upper and lower roll shaft boxes 23 and 26.
The clamped state is released, and the cotter 117 is pulled out from the sliding protrusions 24b and 25b of the left and right side roll shaft boxes 24 and 25 by the take-in / out cylinder 118 of the cotter device 115. Then, by means of the pressure raising / lowering devices 11a, 11b and the pressure side devices 82, 83, the respective axle boxes 23-
26 is moved from the forming position of the electric resistance welded pipe to the original position.
The upper roll shaft box 23 is pulled up slightly higher than the roll replacement height position. After that, the hook 71 released from the hooked state by the hooking member 73 descends in the groove portion 65 of the connecting member 60 by the hooking member 73, and the movable projection 68 rotates around the pin 67 to rotate the upper roll shaft. It is projected to the box 23 side (see FIGS. 9 and 10). Then, the upper roll shaft box 23, which has been pulled up by the pressing device 11 a, is lowered to place the upper roll shaft box 23 on the movable protrusion 68.

Next, the rod 92a of the hydraulic cylinder 92, which is an example of an elevating means for elevating the elevating rail 91, is projected to push up the elevating rail 91, so that the set roll structure 13 is moved together with the moving carriage 12 to the roll replacement height position. Push up to (see right side of Fig. 4). Further, at this time, the protruding portion 64a of the side roll support portion 64 is fitted into the through holes 24a and 25a formed in the sliding protrusions 24b and 25b of the left and right side roll shaft boxes 24 and 25, so that the moving carriage 12 Left and right side roll axle boxes 2 due to vibration during movement of
4 and 25 do not rattle.

After that, the rod 12 of the hydraulic cylinder 12b is
By pulling c, the set roll structure 13 is pulled out together with the moving carriage 12 from the inside of the forming stand 11 and mounted on the empty rail 17a of the rearrangement carriage 17, and then the other rails 1 of the rearrangement carriage 17 are moved by the hydraulic cylinder 15.
7b is connected to the loading / unloading rail 14 and the moving carriage 12 on which the new set roll structure 13 is mounted is pushed into the forming stand 11, or the forming roll of the old set roll structure 13 is exchanged externally. The movable carriage 12 that has been pulled out is returned to the molding stand 11 as it is. However, in any case, the rolls of the forming rolls incorporated in the pulled-out roll roll structure 13 are exchanged at a predetermined roll exchange stage.

As shown in FIGS. 6 and 7, the concrete roll exchanging work is carried out, for example, by an overhead crane or the like.
Old upper roll 19 sandwiched between 0, left and right side rolls 2
0 and 21 are lifted together with the respective axle boxes 23 to 25, and then the respective pins 67 are removed, and the connecting member 60 is moved to the moving carriage 1.
2 Lift from above and pull out, then the old lower roll 2
2 is lifted together with the lower roll shaft box 26. The new rolls 19 to 22 and the connecting member 60 are assembled on the moving carriage 12 in the reverse order.

That is, as shown in the right side of FIG. 4, when the combined roll structure 13 is pushed into the elevating casing 101 of the forming stand 11, the load cell 1 of the rolling-down device 11a is pressed.
Hook metal fitting 23b of the upper roll shaft box 23 on the flange of 1c
Is horizontally mounted and locked, while the sliding protrusions 24b and 25b of the left and right side roll shaft boxes 24 and 25 are formed on the sliding grooves 101 formed on both side plates of the lifting casing 101.
and the rotary shaft 19 of the upper and lower rolls 19 and 22.
a and 22a are connected to the drive spindle 81 with some manual work if necessary.

Then, in the reverse order of the roll replacement,
Once the upper roll shaft box 23 is pulled up by the reduction device 11a, the rod 92a of the hydraulic cylinder 92 is retracted to lower the assembled roll structure 13 together with the moving carriage 12 as shown in the left side of FIG. The protruding portion 64a of the support portion 64 is pulled out downward from the through holes 24a, 25a of the left and right side roll shaft boxes 24, 25, and then the hooking member 73 is hooked on the hook 71 to relatively pull up the hook 71. Therefore, the movable projection 68 rotates around the pin 67 and is drawn toward the connecting member 60 side, and thereafter, the corresponding rolls 19 to 22 are formed by electric resistance tube forming by the press up / down devices 11a and 11b and the press side devices 82 and 83. The upper and lower roll shaft boxes 23 and 26 by the upper and lower clampers 110 and 111, and the left and right side rolls by the cotter device 115. Slide projections 24b of the box 24, 25, 2
By pressing 5b in a slidable state, an electric resistance welded pipe is formed.

If, for example, the electric resistance welded pipe manufacturing equipment line a moves up and down due to the bending of the electric resistance welded pipe due to the welding of the butt joints of the electric resistance welded pipe, the stand elevating means 1
If the molding stand 11 is integrally moved up and down by 00, the deformation of the electric resistance welded pipe due to this can be avoided.

As described above, the inner roll type electric resistance welded pipe forming machine 10 of the first embodiment has the combined roll structure 13 as follows.
Since the shaft boxes 23 to 26 of the respective forming rolls 19 to 22 are connected by the connecting member 60, the inner stand having a weight of 4 to 5 tons is detached from the moving carriage off-line like the conventional roll replacement. This makes it possible to perform the roll exchange work off-line in a stable and safe manner, and easily and quickly. Further, a side roll support portion 64 for supporting each of the left and right side roll shaft boxes 24, 25 is provided on the connecting member 60, and the movable projection 68 provided on the connecting member 60 is operated by using the moving means 71, 73, 92. As a result, the upper roll shaft box 23 can be easily replaced during conventional roll replacement, especially during online replacement.
And the left and right side roll shaft boxes 24 and 25, and between the left and right side roll shaft boxes 24 and 25 and the lower roll shaft box 26, the liner manually inserted by the operator is not required. Roll replacement work, especially online replacement work, can be performed safely and easily.

The side roll support portion 64 is provided with large through holes 24a for the left and right side roll shaft boxes 24, 25.
Since the protruding portion 64a that is detachably fitted to the 25a is provided, the left and right side roll shaft boxes 24 that are loosely inserted into the connecting member 60 due to the vibration during movement when the movable roll 12 moves the combined roll structure 13. , 25 try to rattle in the horizontal direction, but the rattling is prevented by fitting the protruding portion 64a into the through holes 24a, 25a of the left and right side roll shaft boxes 24, 25. The paired roll structure 13 can be stabilized during movement. Furthermore, when the upper roll shaft box 23 is supported or released by the movable means 71, 73, and 92, the movable protrusion 68 is rotated so as to project from the coupling member 60 side or be housed. The upper roll shaft box 23 can be supported or unsupported by a smooth operation with such a structure.

Furthermore, after the lifting rail 91 is pulled down by the hydraulic cylinder 92 to lower the assembled roll structure 13 mounted on the moving carriage 12 to the electric resistance welded pipe forming position, the hanging member 73 of the lifting casing 101 hooks it. Since the stopped hook 71 is pulled up to rotate the movable projection 68 in the storing direction, the online assembling work becomes easier.

Next, based on FIGS. 11 to 13, an inner roll type electric resistance welded pipe forming machine 30 according to a second embodiment of the present invention.
Will be explained. As shown in FIGS. 11 to 13, in the inner roll type electric resistance welded pipe forming machine 30 of the second embodiment, as the combined roll structure 31, the upper and lower rolls 19 and 22, the upper and lower roll shaft boxes 23 and 26, and the connecting member 60. A two-roll type is used. At the time of off-line roll exchange, the upper roll 19, the connecting member 60, and the lower roll 22 are disassembled and removed in this order, and a new roll is assembled on the moving carriage 12 in the opposite order.

Next, an inner roll type electric resistance welded pipe forming machine 119 according to the third embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 14 to 16, the inner roll type electric resistance welded pipe forming machine 119 according to the third embodiment includes a connecting member 106.
By making the side roll support portion 107 for supporting the left and right side roll shaft boxes 24, 25 downward capable of rotating around the pin 107a, it is possible to remove the lower roll 22 when the roll is replaced offline. As a sequence, by removing the connecting member 106 from the moving carriage 12 and then removing the lower roll 22, the lower roll 22 is exposed to an unstable state in which it is only placed on the moving carriage 12. Displacement of the lower roll 22 due to an incident and the moving carriage 1
2 through the through hole 26a of the lower roll shaft box 26, which may cause a position shift when the connecting member 106 is assembled to the moving carriage 12 offline. It is possible to solve the problem that it is troublesome because the connection portion of both members 12 and 106, which is assembled on the movable carriage 12, is forced to be connected in a situation where it is difficult to see.
The side roll supporting portion 107 is configured to rotate together with the protruding portion, and further, the connecting member 1 is configured so that the lower roll shaft box 26 can be smoothly inserted and removed in the housed state.
06 is narrower on the upper side than the mounting portion of the side roll supporting portion 107 and wider on the lower side, and the side roll supporting portion 107 at the time of storage is substantially wide on both sides of the base of the narrow portion. It is stored with its side and surface aligned.

Next, based on FIGS. 17 to 19, an inner roll type electric resistance welded pipe forming machine 12 according to a fourth embodiment of the present invention.
0 will be described. As shown in FIGS. 17 to 19, in the inner roll type electric resistance welded pipe forming machine 120 of the fourth embodiment, an upper roll shaft box 122, left and right side roll shaft boxes 123, 124, and a lower roll are provided as a combined roll structure 121. Through the rod-shaped connecting member 126 that is removably inserted into each of the through holes 122a to 125a of the axle box 125, the upper and lower rolls 12
7, 130 can be moved up and down, and left and right side rolls 12
8, 129 are connected to each other by a predetermined width so that they can be separated from each other.
Upper and lower rolls 127 after recombining rolls with different diameter rolls
A liner 131 for keeping the distance between the shafts of the shafts 130 constant is fixed, and further liners 133 on which the lower roll shaft box 125 is placed are fixed on both ends of the moving carriage 132.

As described above, since the rolls 127 to 130 are movably connected to each other via the connecting member 126, the moving roll carriage 132 is used to form the combined roll structure 12.
Even if vibration occurs when moving 1, the collapse of the upper roll 127, the left and right side rolls 128, 129, etc. is prevented, and the lower roll shaft box 125 and the left and right side roll shaft boxes 123, 124 and the upper roll shaft are prevented. The liner 13 is provided between the box 122 and the left and right side roll shaft boxes 123 and 124.
Since 1 is arranged, the distance between the axial centers of the upper and lower rolls 127 and 130 can be kept constant even after the rolls having different diameters are combined.

At the time of roll replacement, offline
For example, by using an overhead crane or the like, the connecting member 126, the upper roll 127, the left and right side rolls 1 are mounted on the moving carriage 132.
28, 129 and the lower roll 130 are disassembled and removed in this order, and when assembled, they are assembled in the opposite order. In the case of the fourth embodiment, structurally, there is no through hole in the sliding protrusions 123b and 124b of the left and right side roll shaft boxes 123 and 124, and the left and right side roll shaft boxes 123 and 124 have no through holes.
The through holes 123a and 124a of the upper and lower rolls 1 are formed in a long hole shape that is long in the Y direction, and are connected to a drive spindle (not shown) that is separated from the molding stand 11 by a predetermined length.
The rotating shafts 127a and 130a of 27 and 130 are elongated.

Next, with reference to FIGS. 20 to 22, an inner roll type electric resistance welded pipe forming machine 14 according to a fifth embodiment of the present invention.
0 will be described. As shown in FIGS. 20 to 22, the inner roll type electric resistance welded pipe forming machine 140 of the fifth embodiment is a two-roll type combined roll structure 141 having a rod-shaped connecting member 126, and further, upper and lower rolls. Axle box 122, 1
A long liner 142 for holding the shaft center height of the upper roll 127 at the shaft center height of the drive spindle (not shown) is interposed between the 25. This liner 142 is used to set the roll assembly 14 into the forming stand 11 online.
It is attached and detached at the time of assembling and removing to 1.

The present invention has been described above with reference to the drawings. However, the present invention is not limited to this embodiment, and even if there are design changes and the like without departing from the scope of the invention, the present invention is included. For example, the connecting member is not limited to the plate-shaped or rod-shaped member of the embodiment, but may have any other shape. Further, in the first to third embodiments, the movable protrusion provided on the connecting member is rotatable, but the movable protrusion is not limited to this and may be a linear protrusion.

Further, the movable means of the movable protrusion is composed of the first to third members.
The mechanism is not limited to that of the above embodiment, but any mechanism can be used as long as the movable protrusion can be moved. Furthermore, the shape and number of the side roll supporting portions provided on the connecting member are not limited to those of the embodiment as long as the left and right side roll shaft boxes can be supported so that they can be inserted and removed.

In addition, in the first to third embodiments, the base portion of the side roll support portion is provided with the projecting portion which is detachably fitted into the through holes of the left and right side roll shaft boxes. However, the present invention is not limited to this. Alternatively, it may not have a protrusion. Further, in the fourth embodiment, the liners are attached to the upper and lower surfaces of the left and right side roll shaft boxes, but the present invention is not limited to this, and may be attached to the upper and lower roll shaft box sides.

Further, in the embodiment, the connecting member can be removably inserted into each axle box, but without being limited to this, for example, one end of either the upper roll axle box or the lower roll axle box can be used. It may be a fixed part. Therefore,
At the time of roll replacement, the connecting member is simultaneously attached / detached when the upper roll is attached / detached or the lower roll is attached / detached, so that workability is improved. Furthermore, in the embodiment, a cotter device is provided in the elevating casing to adopt a structure in which the sliding protrusions of the left and right side roll shaft boxes are slidably pressed from above, thereby improving the workability of online roll changing work. Although the safety has been improved, the present invention is not limited to this, and an operator may climb a molding stand and insert / remove a separate cotter at a predetermined position as in the conventional case.

Subsequently, in the embodiment, the elevating casing of the forming stand is provided so that it can be moved up and down by the stand elevating means. However, the present invention is not limited to this, and a forming stand that does not move up and down may be used.

[0057]

In the inner roll type electric resistance welded pipe forming machine according to the first to eighth aspects of the present invention, since the respective axle boxes are connected by the connecting member as the combined roll structure, the conventional rolls are used. Like replacement, the weight is 4 to 5t
Since there is no need to attach and detach the inner stand to and from the moving carriage offline, this roll exchange work offline can be performed stably and safely, easily and quickly. Further, in the inner roll type electric resistance welded pipe forming machine according to any one of claims 1 to 5, a side roll support for operating each of the left and right side roll shaft boxes while operating a movable projection provided on the connecting member by a movable means. Section is provided to replace conventional rolls, especially during online replacement.
The liner that was manually inserted by the operator between the upper roll axle box and the left and right side roll axle boxes, and between the left and right side roll axle boxes and the lower roll axle box is no longer required, which allows roll replacement work. , Especially online work safely and easily.

Particularly, in the inner roll type electric resistance welded pipe forming machine according to the second aspect, the side roll supporting portion is provided with the protruding portion which is detachably fitted into the through holes of the left and right side roll shaft boxes. When moving the assembled roll structure by the moving carriage, the left and right side roll shaft boxes loosely inserted in the connecting member try to rattle horizontally due to the vibration during movement, but these protrusions cause the left and right side roll rolls to rattle. By being fitted into the through hole of the axle box, the rattling can be prevented,
As a result, it is possible to stabilize the group roll structure during movement.

Further, in the inner roll type electric resistance welded pipe forming machine according to the present invention, when the movable roll is released from the supporting state or the supporting state of the upper roll shaft box, the movable protrusion is rotated to move from the connecting member side. Since it is projected or stored, the upper roll shaft box can be supported or released by smooth operation with a simple structure.

Further, in the inner roll type electric resistance welded pipe forming machine according to the fifth aspect, the elevating means pulls down the elevating rail to lower the assembled roll structure mounted on the moving carriage to the electric resistance welded pipe forming position. Since the input element hooked on the hooking member of the molding stand is pulled up and the movable projection is rotated in the housing direction, the online assembling work is further facilitated.

Further, in the inner roll type electric resistance welded pipe forming machine according to the sixth and seventh aspects, even when vibration occurs when the movable roll truck moves the combined roll structure, the combined roll structure is still connected through the connecting member. Since the rolls forming the body are connected to each other in a movable state, the rolls are prevented from falling down. Even if the rolls are replaced with different-diameter rolls at the time of roll replacement, in the case of claim 6, between the lower roll shaft box and the left and right side roll shaft boxes, and between the upper roll shaft box and the left and right side roll shaft boxes, On the other hand, in the case of claim 7, since the liner is arranged between the upper and lower roll shaft boxes, the axial distance between the upper and lower roll shafts can be kept constant.

In the inner roll type electric resistance welded pipe forming machine according to the eighth aspect, since the forming stand is integrally raised and lowered by the stand raising and lowering means, for example, the bending of the electric resistance welded pipe due to the welding of the butted portion of the electric resistance welded pipe is prevented. According to the vertical movement of the electric resistance welded pipe manufacturing line, which is the cause, the combined roll structure can be integrally raised and lowered.

[Brief description of drawings]

FIG. 1 is an overall side view showing a pulled-out state of an assembled roll structure of an inner roll type electric resistance welded pipe forming machine according to a first embodiment of the present invention.

FIG. 2 is a side view showing an assembled state of the same roll structure.

FIG. 3 is a perspective view showing a mechanism for taking in and out the same roll structure.

FIG. 4 is an enlarged vertical sectional view of the same.

FIG. 5 is an enlarged cross-sectional view of the same.

FIG. 6 is an enlarged side view of the same roll structure.

FIG. 7 is an enlarged front view of the same roll assembly.

FIG. 8 is a plan view of the same roll assembly.

FIG. 9 is an enlarged front view of an upper portion of the connecting member.

FIG. 10 is an enlarged rear view of an upper portion of the connecting member.

FIG. 11 is an enlarged side view showing a combined roll structure of the inner roll type electric resistance welded pipe forming machine according to the second embodiment of the present invention.

FIG. 12 is an enlarged front view of the same roll assembly.

FIG. 13 is a side view showing an assembled state of the same roll structure.

FIG. 14 is a partially enlarged side view of the combined roll structure of the inner roll type electric resistance welded pipe forming machine according to the third embodiment of the present invention.

FIG. 15 is an enlarged side view of an essential part of the connecting member.

FIG. 16 is an enlarged transverse cross-sectional view of a main part of the connecting member.

FIG. 17 is an enlarged side view of the combined roll structure of the inner roll type electric resistance welded pipe forming machine according to the fourth embodiment of the present invention.

FIG. 18 is an enlarged front view of the same roll structure.

FIG. 19 is an enlarged cross-sectional view of the same.

FIG. 20 is an enlarged side view of a combined roll structure of an inner roll type electric resistance welded pipe forming machine according to a fifth embodiment of the present invention.

FIG. 21 is an enlarged front view of the same roll assembly.

FIG. 22 is a side view showing an assembled state of the same roll structure.

[Explanation of symbols]

 10 Inner roll type electric resistance welded pipe forming machine 11 Forming stand 11a Rolling down device 11b Pushing up device 11c Load cell 11d Rod 12 Moving carriage 12a Pushing up rod 12b Hydraulic cylinder 12c Rod 13 Pair roll structure 14 Loading / unloading rail 15 Hydraulic cylinder 16 Rod 17 Recombining Truck 17a Empty rail 17b Other rails 19 Upper roll 19a Rotating shaft 20 Left side roll 21 Right side roll 22 Lower roll 22a Rotating shaft 23 Upper roll shaft box 23a Through hole 23b Hook metal fitting 24 Left side roll shaft box 24a Through hole 24b Sliding protrusion 25 Right side roll shaft box 25a Through hole 25b Sliding protrusion 26 Lower roll shaft box 26a Through hole 30 Inner roll type electric resistance welded pipe forming machine 31 Set roll structure 60 Connecting member 61 Pedestal 62 Pin 64 Side roll Support Holding part 64a Projection part 65 Groove part 66 Hole part 67 Pin 68 Movable protrusion 69 Long hole 70 pin 71 Hook 72 Side column 73 Hooking member 80 Connecting structure 81 Drive spindle 82 Pressure side device 83 Pressure side device 85 Lifting mechanism 86 Bracket 87 Hydraulic cylinder 87a Rod 88 Bracket 89 Z rail 90 Mounting base 91 Elevating rail 92 Hydraulic cylinder 92a Rod 100 Stand elevating means 101 Elevating casing 101a Lower end protrusion 101b Sliding groove 102 Screw jack 102a Rod 103 Reduction motor 104 Reducer 105 Synchronous shaft 106 Connecting member 107 Side Roll Support Part 107a Pin 110 Upper Clamper 111 Lower Clamper 112 Casing 113 Clamp Plate 114 Clamp Cylinder 114a Rod 115 Cotter Device 116 casing 117 cotter 118 loading / unloading cylinder 118a rod 119 inner roll type electric resistance welded pipe forming machine 120 inner roll type electric resistance welded pipe forming machine 121 set roll structure 122 upper roll shaft box 122a through hole 123 left side roll shaft box 123a through hole 123b Sliding protrusion 124 Right side roll shaft box 124a Through hole 124b Sliding protrusion 125 Lower roll shaft box 125a Through hole 126 Connecting member 127 Upper roll 127a Rotating shaft 128 Left side roll 129 Right side roll 130 Lower roll 130a Rotating shaft 131 Liner 132 Mobile trolley 133 Liner 140 Inner roll type ERW pipe forming machine 141 sets Roll structure 142 Liner a ERW pipe manufacturing facility line

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Riyo Nakagawa 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture 46-59 Nippon Steel Corporation Machinery & Plant Division

Claims (8)

[Claims] 1. A forming stand disposed on a line of an electric resistance welded pipe manufacturing facility, and a combined roll structure mounted on a moving carriage that is put in and taken out of the forming stand to curve-form an electric resistance welded pipe from a thin plate. An inner roll type electric resistance welded pipe forming machine comprising: a pair of roll structure bodies, through which a connecting member detachably provided at both ends of the movable carriage is formed with a through hole formed in each axle box. The upper and lower rolls can be lifted up and down, and the left and right side rolls can be attached to and separated from each other by a predetermined width. An inner roll type electric resistance welded pipe forming machine characterized in that a movable projection for supporting is provided and a side roll supporting portion for supporting each of the left and right side roll shaft boxes is provided. 2. The inner roll type electric battery according to claim 1, wherein the side roll supporting portion is provided with a projecting portion which is detachably fitted into a through hole of the left and right side roll shaft boxes. Sewing pipe forming machine. 3. A forming stand arranged on a line of an electric resistance welded pipe manufacturing facility, and a combined roll structure mounted on a moving carriage that is put in and out of the forming stand to curve-form an electric resistance welded pipe from a thin plate. An inner roll type electric resistance welded pipe forming machine comprising: a pair of roll structure bodies, through which a connecting member detachably provided at both ends of the movable carriage is formed with a through hole formed in each axle box. The upper and lower rolls are mounted so as to be capable of moving up and down through the inner roll, and the connecting member is provided with a movable projection for supporting the upper roll shaft box by a movable means so as to be detachable. Roll type ERW pipe forming machine. 4. The inner roll type electric resistance welded pipe forming machine according to claim 1, wherein the movable protrusion is a rotating protrusion that can be housed on the side of the connecting member. . 5. The movable means of the movable protrusion raises and lowers the elevating rail of the moving carriage arranged at the installation part of the forming stand and the elevating rail until the assembled roll structure reaches the electric resistance welded pipe forming position. 2. An elevating means for moving the input, an input element provided on the movable protrusion side, and a hooking member provided on the molding stand side and detachable from the input element. The inner roll type electric resistance welded pipe forming machine according to any one of items 1 to 4. 6. A forming stand arranged on a line of an electric resistance welded pipe manufacturing facility, and a combined roll structure mounted on a moving carriage that is put in and out of the forming stand to curve-form an electric resistance welded pipe from a thin plate. In the inner roll type electric resistance welded pipe forming machine, the assembled roll structure is a connecting member that is removably inserted into a through hole formed in a shaft box so that the upper and lower rolls can move up and down. Further, the left and right side rolls are connected to each other by a predetermined width so that they can be separated from each other, and further, there is a difference between the lower roll axle box and the left and right side roll axle boxes, and the upper roll axle box and the left and right side roll axle boxes. An inner roll type electric resistance welded pipe forming machine characterized in that a liner is provided for keeping the distance between the axial centers of the upper and lower rolls constant even after the rolls are recombined into a diameter roll. 7. A forming stand arranged on a line of an electric resistance welded pipe manufacturing facility, and a combined roll structure mounted on a moving carriage that is put in and out of the forming stand to curve-form an electric resistance welded pipe from a thin plate. An inner roll type electric resistance welded pipe forming machine comprising: a pair of roll structure, wherein the assembly roll structure is vertically inserted through a connecting member that is removably inserted into a through hole of the lower roll shaft box and / or the upper roll shaft box. The rolls are connected so as to be able to move up and down, and further, a liner is provided between the upper and lower roll shaft boxes to keep the axial distance between the upper and lower rolls constant even after the rolls are recombined into different diameter rolls. Inner roll type ERW pipe forming machine. 8. The molding stand is provided so that it can be raised and lowered by a stand raising and lowering means.
The inner roll type electric resistance welded pipe forming machine according to any one of the above.