JP6336372B2 - Bending roll device - Google Patents

Description

  The present invention relates to a bending roll apparatus, and more particularly to an apparatus capable of bending a fan-shaped flat plate material into a tapered tube base material with high accuracy.

  Metal pipes such as steel pipes are widely used for structures such as columns and machinery, but recently, instead of straight pipes, tapered pipes with continuously changing pipe diameters have been used.

  Conventionally, a processing method for manufacturing a tapered tube by forming a trapezoidal flat plate material into an annular shape by U-O press processing and welding a butt end edge has been proposed (Patent Document 1). There was a case that the bending mark of left.

  In addition, the three rolls are arranged at the positions of the respective apexes of the triangle, and the distance between the one ends of the two lower rolls is set smaller than the distance between the other ends, while each roll is in the longitudinal direction. Dividing into multiple parts, the roll part on one end side is driven at a low speed, the roll part on the other end side is driven at a high speed, the intermediate roll part on one end side and the other end side is driven, and two lower rolls and one roll Set a fan-shaped flat plate material between the upper roll of the machine, process the small-diameter portion of the flat plate material at one end, process the large-diameter portion of the flat plate material at the high-speed portion, and reduce the diameter from the small-diameter portion to the large-diameter portion. Has been proposed, and a bending roll device for bending a tapered tube base shape has been proposed (Patent Document 2). However, since this bending roll apparatus is bent by a plurality of divided rolls, it is easy to form a step on the surface of the tapered tube shaped member.

  On the other hand, the present applicant arranges three rolls in parallel with each other at each vertex of the triangle, and arranges a pair of front and rear pads on the outer side in the roll width direction of the two lower rolls. After positioning the flat plate material between the four corner pads, the four corner pads are retracted, and the partial fan-shaped part of the flat plate material is partially bent into an arc shape with three rolls. The bending roll apparatus which bent the taper pipe | tube shape material was proposed by repeating to the above-mentioned operation by sending to (patent document 3).

JP-A-55-1000081 JP 2007-15014 A JP 2006-159251 A

  However, in the bending roll apparatus described in Patent Document 3, the roll bending process cannot be performed at a distance between the center upper roll and the pair of front and rear pads on the sending side at the start of the partial bending process, There is a problem in that a large angle range needs to be bent by a press, and bending marks remain at a large width at the end of the tapered tube shape member.

  This invention makes it a subject to provide the bending roll apparatus which enabled it to bend a taper pipe | tube shape material with high precision, leaving little edge part bending traces in view of this problem.

  Therefore, the bending roll device according to the present invention is configured such that the flat plate material is partially bent for each partial fan shape at a predetermined angle, the flat plate material is sent in the roll width direction, and the above-described partial bending process is repeated. In a bending roll device that bends a tapered pipe element from the top, the flat plate material is disposed between two lower rolls and one upper roll, and is arranged in parallel with each other at each vertex of the triangle. Are placed, rotated and reversed to form three rolls for performing the partial bending process on the flat plate material, and the front face is formed in a concave shape with two left and right contact portions formed on one end side of the roll. Positioned on the vertical plane passing through the upper roll axis or in the vicinity thereof so as to be rotatable between a standing posture and a retracting posture, and in contact with the arcuate edge on the small diameter side of the flat plate material in the standing posture. And a positioning member for positioning the arcuate edge on the large-diameter side of the flat plate material on the outside of the lower roll axis on the other end side of the roll. Left and right push members that push toward the member and abut the arcuate edge on the small diameter side of the flat plate material against the positioning member, and a rotation drive means that rotates the positioning member to the upright position and reversely rotates to the retracted position And an advancing / retreating drive means for advancing and retreating the pushing member, and an up-and-down movement that moves the upper and lower rolls relatively up and down to allow and hold the flat plate material between the upper and lower rolls. It is characterized by comprising driving means and roll driving means for driving at least two of the three rolls in the rotational direction and the reverse direction.

  One of the features of the present invention is that a positioning member having a concave front surface and two left and right contact portions is used, and this positioning member is provided on or near a vertical plane passing through the upper roll axis. .

  Thus, when the start end of the fan-shaped flat plate material is fed to the extent that it is placed on the lower roll on the delivery side, the fan-shaped flat plate material can be positioned by three points of the two contact portions of the positioning member and the push member on the feed side. The fan-shaped flat plate material can be partially bent by rotating and reversing the roll. For example, the range of bending by a press is small, and almost no end bending marks of the flat plate material remain.

  The second feature of the present invention is that after the flat plate material is partially bent, the flat plate material is fed by a predetermined angle, and is formed into a fan-like shape by four points of the two contact portions of the positioning member and the pressing members outside the left and right lower rolls. The flat material is positioned and partially bent.

  As a result, it is possible to perform a high-precision partial bending process on the tapered tube shape material on the flat plate material by feeding at a predetermined angle and repeating the positioning and partial bending processing by four points, and the tapered material is butt-matched. A highly accurate tapered tube can be manufactured by welding the edges.

It is a schematic plane block diagram which shows preferable embodiment of the bending roll apparatus which concerns on this invention. It is a schematic side block diagram which shows the said embodiment. It is a schematic front block diagram which shows the said embodiment. It is a top view which shows the positioning member in the said embodiment. It is a figure which shows typically the bending operation | work of the said embodiment. It is a schematic plan view which shows the bending roll apparatus of the edge part of the flat plate material used in the said embodiment. It is a figure which shows the example of the roll structure in the bending roll apparatus of the said edge part. It is a figure which shows typically the bending operation | movement of the said edge part. It is a top view which shows a fan-shaped flat material.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 5 show a preferred embodiment of a bending roll apparatus according to the present invention. In the figure, two lower rolls 11 and 12 are laid out parallel to each other on the apparatus frame 10 and are rotatably supported by bearings, while the roll width direction of the two lower rolls 11 and 12 is shown. One upper roll 13 is laid out above the center and is rotatably supported by a bearing, and the three rolls 11 to 13 are arranged at the positions of the respective apexes of the triangle.

  Although not shown, these rolls 11 to 13 are provided to be rotated / reversely driven by a drive device (rotation drive means) such as a drive motor and a reduction gear group, and the upper one roll 13 is a hydraulic cylinder (upper and lower). It is driven up and down by the drive means) 24, and the bending load on the flat plate material 30 is set.

  Further, a pair of left and right push members 14 and 15 are provided on one end side of the rolls 11 and 12 of the apparatus frame 10 and supported by the bracket 16. As shown in FIG. 1, the push members 14 and 15 are disposed on the outer side in the roll width direction with respect to the roll axis of the lower rolls 11 and 12, and a hydraulic cylinder (advance / retreat drive means) 17 is located at the lower center of the apparatus frame 10. Is provided in the longitudinal direction, and the positions of the push members 14 and 15 can be changed by pushing and pulling the bracket 16. The front surfaces of the pressing members 14 and 15 are formed on inclined surfaces so as to be in line contact with the arcuate edge on the large diameter side of the fan-shaped flat plate material 30. The pressing members 14 and 15 may be provided on the vertical plane of the roll axis or on the outer side in the roll width direction in order to stably press the flat plate material 30.

  An adapter 18 is provided on the bracket 16 so as to be rotatable between a lower position and a flip-up position, and is rotated by a hydraulic cylinder (not shown).

  On the other hand, a positioning member 19 is provided on the other end side of the rolls 11 and 12 of the apparatus frame 10 and is supported by a bracket 20 that can rotate along the roll axis direction. The bracket 20 is a hydraulic cylinder (rotation drive means). 21 is provided so as to be rotated between a standing posture and a retracting posture, and the front surface of the positioning member 19 is formed in a concave shape, and in the standing posture, the fan-shaped flat plate material 30 is formed at the left and right contact portions 19A. In contact with the arcuate edge on the small diameter side, the flat plate material 30 is allowed to move in the roll width direction in the retracted posture.

  6 to 9 show examples of a bending roll device at the end of the flat plate material 30. FIG. In the figure, an end bending roll 50 is rotatably supported on an apparatus frame (not shown), and a plurality of U-shaped holders 50A extend in the longitudinal direction on the outer surface of the end bending roll 50 and are circumferential. It is fitted with a gap in the direction.

  A receiving plate 52 is laid out below the end bending roll 50 and is slidably supported by the receiving roll 55. A supporting roll 51 is mounted on the receiving plate 52, and the tilt angle can be adjusted by the left and right jacks 54. It is like that.

  When manufacturing a taper tube shape material using the fan-shaped flat plate material 30, as shown in FIG. 1, the upper roll 13 is raised, and between this upper roll 13 and the two lower rolls 11 and 12, The end portion of the flat plate material 30 is inserted, the starting end portion of the flat plate material 30 is placed on the lower roll 11 on the delivery side, and in this state, the hydraulic cylinder 17 is contracted to advance the push members 14, 15 and the hydraulic cylinder 21 When the flat plate material 30 is sandwiched between three points of the two contact portions 19A of the feeding-side positioning member 15 and the push member 19, the flat plate material 30 passes through the apex and is flattened. The material 30 is positioned so that a straight line extending in the radial direction of the material 30 is located on a vertical plane passing through the roll axis of the upper roll 13.

  Next, the upper roll 13 is lowered to sandwich the flat plate material 30 between the two lower rolls 11, 12, the push members 14, 15 are retracted, the positioning member 19 is rotated backward, and the upper roll 13 When a predetermined bending load is applied to the rolls 11 and 13 and the rolls 11 to 13 are rotated and reversed, FIG. 5 (however, in FIG. 5, for convenience, the pressing members 14 and 15 are outside the roll of the upper roll 13 and the lower rolls 11 and 12. The example in which the flat plate material 30 passes through the apex and extends in the radial direction of the flat plate material 30 is positioned on the central axis of the upper roll 13 as shown in FIG. While being maintained, the sheet is fed in one direction in the roll width direction and returned in the opposite direction, and this operation is repeated, whereby the fan-shaped portion of the flat plate material 30 is partially bent into a taper shape.

  Thereafter, the upper roll 13 is raised to feed the next predetermined angle portion of the flat plate material 20, the push members 14 and 15 are advanced, the positioning member 19 is erected, and the three rolls 11 to 13 are moved in the same manner as described above. Partial bending is performed by rotating and reversing, and when the partial bending is performed in the same manner, a tapered pipe element is obtained.

  By the way, it is difficult for the fan-shaped flat plate material 30 to be partially bent with respect to the start end portion 30A. Therefore, in this example, the bending portion of the end portion 30A shown in FIGS. 6 to 9 is used to bend the starting end portion 30A before performing the above-described partial bending.

  In this end bending roll apparatus, the start end of the fan-shaped flat plate material 30 is fitted into the holder 50 </ b> A of the end bending roll 50, and the flat plate material 30 is mounted on the support roll 51. Further, the inclination angle of the support roll 51 is set by extending or contracting the jack 51. For example, when the apex angle α of the fan-shaped flat plate material 30 is large, the tilt angle of the support roll 51 is set large, and when the apex angle α is small, the tilt angle of the support roll 51 is set small.

  When the end bending roll 50 is rotated when the preparation is completed in this way, the support roll 51 approaches the end bending roll 50 together with the receiving plate 52 as the end bending roll 50 rotates as shown in FIG. The starting end portion 30A of the flat plate material 30 is gradually bent round, but the small-diameter side edge of the flat plate material 30 is bent to a large curvature with a small curvature radius by the inclined support roller 51, and the large-diameter side edge is a large curvature. Since the bend is made with a small radius of curvature, the starting end portion 30A is partially bent into a tapered shape, and the flat plate material 30 with the starting end portion 30A bent in this way is partially bent by the bending roll device shown in FIGS. By repeating, a highly accurate tapered tube shape material is obtained.

  After that, when the taper tube shape material is taken out and the butt end edges are welded, a highly accurate taper tube can be obtained.

  In the above example, the starting end portion was bent using the bending roller device at the end portion, but even if the starting end portion is bent by a press, the width of the starting end portion is small, so that bending marks may remain. There is little nature.

DESCRIPTION OF SYMBOLS 10 Apparatus frame 11, 12 Lower roll 13 Upper roll 14, 15 Push member 17 Hydraulic cylinder (advance / retreat drive means)
19 Positioning member 21 Hydraulic cylinder (turning drive means)
24 Hydraulic cylinder (vertical drive means)
30 Flat plate material 30A Start end

Claims (1)

Bending the taper tube shape material from the flat plate material by bending the flat plate material into partial fan shapes of a predetermined angle, sending the flat plate material in the roll width direction and repeating the partial bending process. In the bending roll device
The plate material (30) is placed between the two lower rolls (11, 12) and the one upper roll (13) at the positions of the respective apexes of the triangle. Three rolls (11, 12, 13) for performing the partial bending process on the flat plate material (30) by being reversed;
The front surface has a concave shape and two left and right contact portions (19A) are formed, and are provided on a vertical plane passing through the upper roll axis on the one end side of the roll or in the vicinity thereof so as to be rotatable between a standing posture and a retracted posture. A positioning member (19) for positioning in contact with the arcuate edge on the small diameter side of the flat plate material (30) in the standing posture;
It is provided so as to be able to advance and retreat in the lower roll axis direction on the outer side in the roll width direction with respect to the lower roll axis on the other end side of the roll, and the arcuate edge on the large diameter side of the flat plate material (30) Left and right pressing members (14, 15) that are pressed toward the positioning member (19) by pressing toward the positioning member (19).
Rotation driving means (21) for rotating the positioning member (19) to an upright position and reversely rotating to a retracted position;
Advancing / retreating drive means (17) for advancing and retracting the pushing member (14, 15);
The upper roll (13) and the lower roll (11, 12) are relatively moved up and down, and the flat plate material (30) is inserted between the upper roll (13) and the lower roll (11, 12). Vertical drive means (21) for allowing and clamping
Roll driving means for rotating and reversing at least two of the three rolls (11, 12, 13);
A bending roll device comprising:

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