JP4221097B2 - Seam position adjusting device in cold roll forming - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seam position adjusting device that determines a seam of a round pipe or a square pipe at an arbitrary position in the circumferential direction in cold roll forming in which a round pipe or a square pipe is manufactured from a raw material.
[0002]
[Prior art]
In cold roll forming in which a round pipe or a square pipe is manufactured from a raw material, a seam position adjusting device is used that determines the seam of the round pipe or the square pipe at an arbitrary position in the circumferential direction. A conventional seam position adjusting device has, for example, a structure in which a round pipe that has been cold-rolled from a flat plate is sandwiched between a pair of autonomously driven vertical rolls or horizontal rolls. One of these was moved up and down as a whole to apply a circumferential force to the round pipe to rotate in the circumferential direction. The seam is determined at an arbitrary position in the circumferential direction by the rotation of the round pipe.
[0003]
[Problems to be solved by the invention]
The conventional seam position adjusting device applies a circumferential force to the round pipe in a so-called “scrubbing up” or “scrubbing down” manner by a vertical roll or a horizontal roll pressed against the round pipe. This would give an unnecessary load to the round pipe, and would damage the round pipe called a roll mark. Further, adjustment for determining the seam at an arbitrary position in the circumferential direction is difficult, and fine adjustment is difficult. Therefore, we examined the development of a new seam position adjustment device that can be easily adjusted without adding roll marks.
[0004]
[Means for Solving the Problems]
What has been developed as a result of the study is a seam position adjusting device that determines the seam of the various pipes at an arbitrary position in the circumferential direction in cold roll forming for manufacturing various pipes, and sandwiches and supports the various pipes. Each idler roll consists of an idler roll , and each idler roll is attached to a roll holder that protrudes from a tilt shaft. The roll holder is pivotally supported by a base with a tilt shaft, and a worm wheel is fixed to the tilt shaft protruding from the roll holder. The worm is meshed with the worm hole, a bevel gear is attached to the rotation shaft of the worm, and the main bevel gear meshing with each of the bevel gears is provided on the tilt adjusting shaft penetrating both bases, gear is stuck turn the tilt adjustment shaft is rotated in opposite directions, your cold roll forming tilting to alternately and equal amounts of the plane of rotation of the idler roll That is a seam position adjustment device. The idler roll may be configured such that the base connected by the width adjusting shaft is moved closer to and away from the base by the width adjusting shaft to adjust the interval between the idler rolls. The rotation plane of each idler roll can be freely selected, but the rotation planes of the pair of idler rolls are usually aligned on the same plane, and the rotation planes are arranged horizontally or vertically . The inclination of the rotation plane, manual or mechanical movement can be used together.
[0005]
The idler roll is driven in other ways, and in the present invention, it simply rotates according to the feed of various pipes. However, each horizontal idler roll adjusts the pitch angle of the rotating surface with respect to the feed direction, so that the rotational force of the idler roll is generated in a direction substantially equal to the inclination of the rotating surface. The difference between the feeding direction of the various pipes and the rotational force of the idler roll applies a vertical force to the various pipes. Instead of forcibly applying force by moving the autonomously driven rollers holding various pipes up and down or left and right as in the past, the force is gradually applied according to the rotation of the idler roll. There is no mark.
[0006]
The amount of rotating various pipes in the circumferential direction with the idler roll alone of the present invention is not so large. However, by tilting the rotation surfaces of the pair of idler rolls at the pitch angles in the positive and negative directions, various pipes can be efficiently rotated in the circumferential direction with a small force. At this time, the absolute amount of the pitch angle of the rotating surface in each idler roll may be different. However, for example, if both idler rolls can be tilted in the positive and negative directions and at equal pitch angles by rotating one adjustment shaft, it is easy to grasp the rotation amounts of various pipes in the circumferential direction by adjustment.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway front view of a seam adjusting device 1 according to the present invention, FIG. 2 is a plan view of the device 1, and FIG. 3 is a partially broken left side view of the device 1. The seam adjusting apparatus 1 shown in the present example is configured so that the rotation surfaces of idler rolls 2 and 2 arranged in a pair on the left and right in a horizontal plane can be adjusted to the same or opposite pitch angle. In the seam adjusting device 1 of the present example, the operator manually adjusts the tilt adjustment shaft 13 by the operator.
[0008]
The idler roll 2 is pivotally mounted so as to be held in a U-shaped roll holder 4 projecting from a tilting shaft 3, and this roll holder 4 is pivotally supported on the base 5 by the tilting shaft 3. It is attached to the main body frame 6 so as to approach and separate. By making the base 5 close to and away from, the distance between the idler rolls 2 and 2 can be adjusted according to the pipe diameter. The base 5 is moved closer and away using a width adjusting shaft 7 attached to the main body frame 6.
[0009]
Idler roll 2 tilts while adjusting the pitch angle by causing the worm 9 meshes if the fan-shaped worm wheel 8 which is fixed to the tilt shaft 3 is rotated normally and reversely. A rotating shaft 10 of each worm 9 passes through the base 5 and a bevel gear 11 is attached to one end. Both bases 5 and 5 are provided with a tilt adjusting shaft 13 connected by a universal joint 12 which can be expanded and contracted. The tilt adjusting shaft 13 is provided with main bevel gears 14 and 14 that mesh with the respective bevel gears 11 from opposite directions. For this reason, when the tilt adjustment shaft 13 is rotated, the bevel gears 11 and 11 rotate in opposite directions, and the rotation surfaces of the idler rolls 2 and 2 can be tilted alternately and equally. Thus, the seam position adjusting device 1 of the present invention can easily change the circumferential position of the seam by rolling various pipes simply by turning the tilt adjusting shaft 13.
[0010]
FIG. 4 is a plan view of an example in which a seam position adjusting device 1 (only idler rolls 2 and 2 are shown) is provided on a pipe making line for forming a round pipe (welded) 15 by cold roll forming, and FIG. FIG. 6 is a side view of the pipe making line. FIG. 6 is provided with a seam position adjusting device 1 (only the idler rolls 2 and 2 are shown) on the pipe making line that turns the round pipe (welded) 15 into a square pipe 16 by cold roll forming. FIG. 7 is a plan view of the example, and FIG. 7 is a side view of the pipe manufacturing line.
[0011]
The seam position adjusting device 1 is installed between the forming rolls 17 and 17 as seen in FIG. 4 or FIG. In this example, the round pipe (before welding) 18 sent from the right in the drawing is first advanced to the heater 19 with the end edge melted by the torch 25, and the end edge brought into close contact with the squeeze roll 20 After welding the bead on the seam 22 with the bead cutter 21, the round pipe (welded) 15 is cooled in the cooling bath 23, and then the seam 22 welded using the seam position adjusting device 1 is arbitrarily selected in the circumferential direction. To be in the position.
[0012]
The seam position adjusting device 1 of the present invention can also be used when manufacturing a square pipe 16 from a round pipe 15 as seen in FIGS. In this example, the round pipe (welded) 15 sent from the right in the figure is passed through the seam adjusting device 1 between the forming rolls 17 and 17, and the circumferential position of the seam 22 is determined. When forming with the square pipe forming roll 24, the seam 22 is brought to an appropriate surface or corner.
[0013]
The seam adjusting device 1 according to the present invention can be automatically operated by converting the positional deviation of the seam 22 into a numerical value and processing it. FIG. 8 is a partially broken front view of the seam adjusting device 1 in which the tilting of the idler roll 2 is automated by the servo motor 26, and FIG. 9 is for detecting misalignment of the device 1 (only the idler rolls 2 and 2 are shown) and the seam 22. FIG. 10 is a side view of the pipe manufacturing line corresponding to FIG. 4 in which the camera 27 of FIG. 4 is arranged. FIG. 11 is a processing flow showing a feedback system including the servo motor 26 and the camera 27. is there. The function of the seam adjusting device 1 is the same as the above-described example except that the tilt of the idler roll 2 is automated by the servo motor 26, and a description thereof will be omitted.
[0014]
In this example, a camera 27 for detecting an image of the position of the seam 22 is disposed in the vicinity of the heater 16 or the torch 25 (see FIGS. 9 and 10), and the position of the seam 22 is analyzed by numerical analysis of the obtained image. The shift is digitized, and the idler roll 2 is tilted by operating the servo motor 26 (see FIG. 8) based on the position shift value. In this example, as shown in FIG. 11, the sequencer 28 is used because the control content is simple as shown in FIG. 11, but a general-purpose personal computer or the like may be used. Control modes are divided into those that correct the deviation of the seam 22 from a predetermined reference line and those that correct the deviation from the seam 22 in a normal state. In either case, the seam 22 is misaligned. Then, the servo motor is operated so that the idler roll 2 tilts in a direction to correct the positional deviation.
[0015]
【The invention's effect】
According to the present invention, the position of the seam in the circumferential direction can be easily determined without causing damage such as a roll mark. In addition, since the seam position adjusting device of the present invention uses an idler roll driven by other rules, it can be freely arranged without considering the power source with respect to the pipe production line, and a new or existing pipe production line can be installed. There is an advantage that can be used regardless. Furthermore, by adding a feedback system that combines a camera and a servo motor, it becomes possible to automatically correct the misalignment of the seam, thereby contributing to labor saving of the pipe manufacturing line and improvement of production efficiency.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a seam adjusting device of the present invention.
FIG. 2 is a plan view of the apparatus.
FIG. 3 is a partially broken left side view of the apparatus.
FIG. 4 is a plan view of an example in which a seam position adjusting device is provided in a pipe-making line in which a flat plate is formed into a round pipe by cold roll forming.
FIG. 5 is a side view of the pipe manufacturing line.
FIG. 6 is a plan view of an example in which a seam position adjusting device is provided in a pipe making line in which a round pipe is formed into a square pipe by cold roll forming.
FIG. 7 is a side view of the pipe manufacturing line.
FIG. 8 is a partially cutaway front view of a seam adjusting device in which tilting of an idler roll is automated by a servo motor.
9 is a plan view of a pipe forming line corresponding to FIG. 4 in which the apparatus and a camera for detecting seam misalignment are arranged.
FIG. 10 is a side view of the pipe manufacturing line.
FIG. 11 is a processing flow showing a feedback system composed of a servo motor and a camera.
[Explanation of symbols]
1 Seam adjustment device 2 Idler roll 3 Tilt axis
13 Tilt adjustment axis

Claims (2)

A seam position adjusting device for setting a seam of various pipes at an arbitrary position in the circumferential direction in cold roll forming for manufacturing various pipes, comprising a pair of idler rolls holding and supporting various pipes, and each idler roll Is mounted on a roll holder protruding from a tilt shaft, and the roll holder is pivotally supported on the base by the tilt shaft. A worm wheel is fixed to the tilt shaft protruding from the roll holder, and a worm is attached to the worm hole. The bevel gear is attached to the rotating shaft of the worm, and the tilt adjusting shaft is provided in the tilt adjusting shaft penetrating the both bases. turning the gear is rotated in opposite directions to each other are stuck, cold roll forming, characterized in that tilting the staggered and equal amounts of the plane of rotation of the idler roll The seam position adjustment device in. The idler roll is a seam position adjusting device in cold roll forming according to claim 1 , wherein a base connected by a width adjusting shaft is moved closer to and away from the base by the width adjusting shaft to adjust an interval between idler rolls .

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