JP2014042937A - Pipe material correction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct roundness of a pipe material at an arbitrary width in an axial direction.SOLUTION: A pipe material correction device includes a ring-shaped casing 2 disposed on an outer peripheral surface of a pipe material T and an inner peripheral side roller 3 abutted on an inner peripheral surface of the pipe material T. An outer peripheral side roller is brought into pressure contact with the casing 2 so as to rotate the casing 2 and the pipe material T by making them interlocked with each other. A pair of hydraulic jacks 30 are provided to incline the pipe material T by an inclined angle θ in plan view with respect to axes C2 and C3 of the casing 2 and the inner peripheral side roller 3 at a position away from the inner peripheral side roller 3 on the outer peripheral surface of the pipe material T. The casing 2 and the pipe material T are rotated by the outer peripheral side roller, thereby moving the inclined pipe material T in an axial direction while rotating and widening a correction region of the pipe material T which is brought into pressure contact by the inner peripheral side roller 3 and the casing 2 by displacing the correction region in the axial direction while forming the correction region in a peripheral direction.

Description

  The present invention relates to a pipe straightening device that can adjust a straightening region of a pipe by moving the pipe when the roundness of the pipe is straightened.

  When the roundness of pipe materials used for pipelines and piles is not sufficiently ensured, there are cases where poor bonding and poor quality occur when joining such as welding or mechanical joining. On the other hand, the pipe material may be partially or locally deformed or formed into a non-circular shape such as an elliptical shape due to various factors during manufacture, transportation, storage, and the like. For this reason, prior to joining or the like, correction processing for increasing the roundness of various portions (axial regions) in the axial direction of the pipe material is performed in advance.

As an apparatus for increasing the roundness of a pipe material, for example, a pipe end straightening apparatus described in Patent Document 1 is known.
In this straightening device, a radial hydraulic cylinder having a rod for applying an external load is arranged on the outer periphery of the end of the tube via a contact plate, and an axial direction having a rod for adding an internal pressure load is provided on the inner periphery of the end of the tube. The hydraulic cylinder is arranged. At the time of straightening, the hydraulic pressure in the axial direction from the inner surface of the pipe end is applied while applying the radial load with the hydraulic cylinder from the two directions outside the pipe to form and hold the pipe end shape in a perfect circle. By applying the internal pressure by the cylinder, the end of the pipe is corrected to a perfect circle by unloading the internal pressure using the circumferential stress of the pipe in the vicinity of the pipe end as a yield stress.

The width (length) in the tube axis direction for rounding the end of the tube material is determined by the width of the contact plate attached to the radial hydraulic cylinder.
Moreover, since the residual stress in the circumferential direction of the pipe material is distributed almost evenly by correcting the pipe material in this way, the end portion is corrected to a perfect circle.

Japanese Patent Publication No. 60-45013

However, the correction device described in Patent Document 1 can correct only the width of the backing plate installed at the end of the pipe by the radial hydraulic cylinder. If this is improved and the straightening width of the pipe is increased, it is necessary to increase the width of the backing plate, and the radial and axial loads necessary for straightening increase, so the hydraulic cylinder becomes huge. There is.
Alternatively, in order to widen the straightening width of the pipe, it is necessary to perform straightening with the radial and axial hydraulic cylinders in multiple steps while shifting the position of the radial hydraulic cylinder backing plate with respect to the pipe. For this reason, there is a disadvantage that the working time becomes longer.

  The present invention has been made in view of such problems, and corrects the roundness in the axial direction of the pipe material to an arbitrary width without installing a patch plate for regulating the correction width on the pipe material. It is an object of the present invention to provide a pipe material straightening apparatus that can perform the above-described process.

  A tube straightening device according to the present invention is a tube straightening device that corrects the roundness of a pipe, and is arranged on the outer peripheral surface of the pipe so that the inner peripheral surface formed in a circular cross section faces the outer peripheral surface of the pipe. A ring-shaped casing, an inner peripheral roller disposed in contact with the inner peripheral surface of the pipe, and an inner peripheral surface of the casing by applying a pressing force between the inner peripheral surface of the casing and the outer peripheral surface of the pipe. A pressing means for plastically deforming the pipe with the surface as a straightened surface, and a rotating means for rotating the casing and the pipe around its axis, and one of the axis of the pipe, the axis of the casing, and the axis of the inner peripheral roller One axis is arranged to be inclined with respect to the other two axes, and when the pipe is rotated, the pipe moves in the axial direction.

According to the pipe material correcting device of the present invention, when the casing and the pipe material are rotated around the axis thereof by the rotating means, the pipe material is plastically deformed in the region pressed by the inner peripheral side roller, and the inner peripheral surface of the casing is corrected. It is rotated while being corrected as a surface, and the pipe material is plastically deformed over the entire circumference in the region of the inner peripheral side roller while being pressed by the inner peripheral side roller, and is corrected to a perfect circle. Moreover, since any one of the axis of the tube, the axis of the casing, and the axis of the inner roller is inclined with respect to the other two axes, the tube is at least the inner roller or casing. When the tube is rotated, it moves along its axis.
Accordingly, the straightening region of the pipe material corresponding to the inner peripheral side roller is not changed without changing the straightening load by the inner peripheral side roller and the straightening region of the pipe material is not limited to the width of the contact plate or the inner peripheral side roller. The circumferential surface of the pipe material can be continuously straightened by shifting in the axial direction according to the inclination angle for each rotation of the pipe material, and the straightening width can be formed wider than that of the inner peripheral side roller. The device can be reduced in size by shortening.
The plastic deformation generated in the pipe material is the same as that of rolling, and the compressive deformation in the thickness direction of the pipe material in the line contact region between the inner roller and the casing and the pipe material is the circumferential direction of the pipe material according to the constant volume rule. Converted to stretch deformation to. Elongation deformation in the circumferential direction is constrained by the inner peripheral surface of the casing in the deformation direction, and the shape deformation of the tube progresses following the shape of the inner peripheral surface of the casing, so that effective correction can be achieved. Done.

Moreover, the axis line of the pipe material may be disposed to be inclined with respect to the axis line of the casing and the axis line of the inner peripheral side roller.
In this case, since the axis of the pipe material is inclined to one side with respect to the axis of the casing and the axis of the inner peripheral roller in plan view, when the casing and the pipe are rotated by the rotating means, the inner peripheral roller The pipe material pressed into the casing in the pressed region moves in a direction in which the pipe material is separated from or approaches the inner peripheral roller according to the inclination direction of the pipe material with respect to the casing axis line. Since the correction area is shifted in the axial direction for each rotation, the correction process can be widely performed without being limited to the width of the inner peripheral roller.

Further, the axis of the casing may be disposed to be inclined with respect to the axis of the tube material and the axis of the inner peripheral roller.
Since the casing rotates in an inclined state by the rotating means, the pipe material pressed against the casing in the region pressed by the inner peripheral roller is in a direction in which the pipe member is separated from the inner peripheral roller by the rotation of the casing in the inclined state. Or, since it moves in the approaching direction, and the correction region is shifted in the axial direction every time the tube is rotated, it can be widely corrected without being limited to the width of the inner peripheral roller.

Further, the axis of the inner peripheral side roller may be arranged to be inclined with respect to the axis of the tube material and the axis of the casing.
When the casing is rotated by the rotating means, the pipe material pressed against the casing in the region pressed by the inner peripheral side roller in the inclined state approaches or approaches the inner peripheral side roller by the rotation of the casing. Since the correction area is shifted in the axial direction by the inner peripheral roller in an inclined state every time the tube is rotated, it is not limited to the width of the inner peripheral roller, etc. Can be straightened.

Moreover, the inclination member which inclines a pipe material and supports the outer peripheral surface so that rotation and movement are possible may be further provided.
When the tube material is inclined with respect to the axes of the casing and the inner peripheral side roller, the tube material can be supported by the inclined member so as to be rotatable and movable in the axial direction.

Further, the inclined member may support a position separated in the axial direction of the pipe material from a position where the inner peripheral surface of the pipe material is pressed by the inner peripheral side roller.
When the pipe is tilted with respect to the axes of the casing and the inner peripheral side roller, the inclined member can be rotated with the pipe tilted at a position away from the point of action of the pressure contact force on the pipe by the inner peripheral side roller. In order to support, the inclined member can incline the pipe member with a small force.

Further, the casing is formed with a gap between the inner peripheral side roller and the tube material in a region other than the region where the inner roller is pressed against the tube material.
The pipe material is sandwiched and pressed between the inner peripheral roller and the casing, and other areas of the pipe material are formed with a gap between the casing and the pipe material is inclined relative to the casing. Can do.
And since the opposite side of the area where the tube material is pressed by the inner peripheral roller is pressed by the casing, the rotational force of the rotating means is transmitted to the tube material through the casing, and the region where the inner peripheral roller of the tube material comes into contact. Plastic deformation can be performed in the circumferential direction. At that time, any one of the tube material, the inner peripheral side roller, and the casing is inclined with respect to the other two, and there is a gap between the pipe material and the casing except for the region compressed by the inner peripheral side roller. Therefore, the casing does not prevent the pipe from moving forward and backward.

According to the pipe material correcting device of the present invention, when the casing and the pipe material are rotated around the axis thereof by the rotating means, the pipe material is plastically deformed and corrected in the region pressed against the casing by the inner peripheral side roller. The tube is rotated around the axis, and the pipe material is plastically deformed over the entire circumference to be corrected to a perfect circle. Moreover, since any one of the axis of the tube, the axis of the casing, and the axis of the inner roller is inclined with respect to the other two axes, the tube is at least the inner roller or casing. The pipe material advances and retreats along its axis while being straightened with the inner peripheral roller by the rotation of the casing. Without being limited to the width of the roller or the like, the peripheral surface of the pipe can be continuously corrected over an arbitrary width while shifting the correction area of the pipe in the axial direction.
Therefore, the pipe material straightening device can be downsized by shortening the work time for straightening the pipe material.

It is the side view which fractured | ruptured some pipe material correction apparatuses by 1st embodiment of this invention. It is the principal part front view seen from the axial direction of the pipe material which shows the principle of the pipe material correction apparatus shown in FIG. It is a principal part top view which shows the relationship between the pipe material in the pipe material correction apparatus shown in FIG. 1, a casing, and an inner peripheral side roller. FIG. 4 is a plan view of a main part in which the pipe material is inclined in a direction opposite to that in FIG. 3 in the pipe material correcting device shown in FIG. It is the partially broken side view similar to FIG. 1 which shows the modification of the pipe material correction apparatus by 1st embodiment of this invention. It is a principal part top view which shows the relationship between the pipe material in the pipe material correction apparatus by 2nd embodiment of this invention, a casing, and an inner peripheral side roller. It is a principal part top view which shows the relationship between the pipe material, casing, and inner peripheral side roller in the pipe material correction apparatus by 3rd embodiment of this invention.

Hereinafter, a pipe straightener according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
1 and 2 is a device for correcting the roundness of an arbitrary portion such as an end portion of a substantially cylindrical tubular material T made of a steel material. In this specification, the roundness refers to the ratio of the difference between the maximum outer diameter and the minimum outer diameter in an arbitrary cross section perpendicular to the central axis (hereinafter simply referred to as the axis) C1 of the tube T to the specified outer diameter. means. Then, correcting the roundness means correcting the tube material T so that the roundness approaches zero. The closer the roundness is to zero, the closer the cross-sectional shape of the pipe material is to a perfect circle.

In the following description, the case where the pipe material correcting device 1 corrects one end (axis region) T1 in the direction of the axis C1 of the pipe material T will be described as an example.
As shown in FIGS. 1 and 2, the tube straightening device 1 according to the present embodiment is formed in a ring shape and has a casing 2 disposed so that the inner peripheral surface 2 a faces the outer peripheral surface Ta of one end T <b> 1 of the tube T. The outer peripheral surface is brought into contact with a partial region of the inner peripheral surface Tb of the tube material T, and the inner peripheral side roller 3 disposed on the inner peripheral surface of the tube material T and the outer peripheral surface of the casing 2 are pressed into contact with the casing. The outer peripheral side roller 4 which gives rotational force to 2 and the rotation means 5 which rotationally drives the outer peripheral side roller 4 are provided.
The outer peripheral side roller 4 is located at a position facing the inner peripheral side roller 3 with the casing 2 and the tube T interposed therebetween, and the casing 2 and the pipe T which are in contact with the rotation of the outer peripheral side roller 4 are rotated to rotate the inner peripheral side. The tube 3 is straightened by plastic deformation of the tube T.

The inner peripheral surface 2a of the casing 2 is formed in a perfect circle or a substantially true circle when viewed from the center axis line (hereinafter simply referred to as an axis) C2 of the casing 2. The casing 2 is made of a metal such as steel, and the rigidity of the casing 2 is preferably sufficiently higher than the rigidity of the tube material T.
The inner diameter of the casing 2 is set to be slightly larger than the outer diameter of the pipe material T. The casing 2 is arranged on the outer periphery of the pipe material T, and the pipe material T and the casing 2 are connected to the inner roller 3 at the lower end portion, for example. When the outer peripheral surface of the casing 2 is pressed by the outer peripheral roller 4 while being sandwiched between the outer peripheral rollers 4, the outer peripheral surface 2a of the casing 2 excluding this pressing region and the outer peripheral surface Ta of the tube T are slightly increased in the circumferential direction. The inner diameter of the casing 2 is set so that the gap K is formed.

The rotating means 5 includes a driving motor 7 as a driving source for rotating the outer peripheral roller 4 and a gear 9 in which the rotation of the driving motor 7 is transmitted through the rotary joint 8 in a coaxial manner. A drive shaft 10 and a gear 11 that meshes with the gear 9 of the driven shaft 10 and rotates integrally coaxially with the outer peripheral roller 4 are provided. Therefore, the driving force of the drive motor 7 is transmitted to the gear 11 and the outer peripheral roller 4 via the rotary joint 8, the driven shaft 10 and the gear 9.
As shown in FIG. 1, the pipe material correcting device 1 has a machine base 13 having moving wheels 12 on a horizontal plane G. On the machine base 13, rotating means 5 as described later. A hydraulic jack 14 for applying an upward pressing force to the outer peripheral side roller 4 is provided as a pressing means.

On the other hand, a fixed frame 16 is provided on the machine base 13, and a vertical moving frame 17 that supports the outer peripheral side roller 4 of the rotating means 5 is attached to the fixed frame 16 so as to be slidable in the vertical direction. A central shaft 19 is rotatably provided at the center of the outer peripheral roller 4 via a bearing 18, and the central shaft 19 is supported by a vertically moving frame 17.
Therefore, the outer peripheral roller 4 is moved up and down via the vertical movement frame 17 by the hydraulic jack 14 as the pressing means. Moreover, the rotation of the drive motor 7 is transmitted to the driven shaft 10 via the rotary joint 8 regardless of the vertical movement position of the vertical movement frame 17.
The driven shaft 10 is rotatably attached to the vertically moving frame 17 via a bearing 21.

  A support base 23 is erected on the machine base 13 at a position adjacent to or spaced from the rotating means 5, and the base of the support shaft 24 that supports the inner peripheral roller 3 is centered on the support base 23. An axis (hereinafter simply referred to as an axis) C3 is fixed in the horizontal direction. The inner peripheral side roller 3 formed in a substantially cylindrical shape is fixed to the outer peripheral surface of the small diameter portion 24a at the tip of the support shaft 24 via a bearing 25, and the inner peripheral side roller 3 is rotatable around the axis C3. ing. The inner peripheral roller 3 is set to have an outer diameter smaller than the inner diameter of the tube material T, and the inner peripheral roller 3 is configured by providing a protective layer on the surface of, for example, steel.

  Further, in the principle diagram of the pipe material correcting device 1 shown in FIG. 2, for example, a pair of guide rollers 27 are installed on both sides of the outer peripheral roller 4 that rotatably supports the casing 2 to support the casing 2. An accumulator 28 is connected in the middle of the hydraulic pressure supply path of the hydraulic jack 14, and the accumulator 28 controls the pressing force of the hydraulic jack 14 against the casing 2 to a low pressure regardless of a change in the thickness of the pipe T. Configure the means. The accumulator 28 functions to absorb weighted fluctuation due to a change in stroke of the hydraulic jack 14.

Next, the arrangement configuration of the tube material T, the casing 2, and the inner peripheral side roller 3 in a plan view will be described with reference to FIG.
In the plan view shown in FIG. 3, the casing 2 and the inner peripheral roller 3 are arranged so that their axes C2 and C3 are substantially the same line, and the outer peripheral surface Ta is in contact with the lower end of the casing 2. The inner tube T is in contact with the inner circumferential surface Tb of the inner circumferential side roller 3 so as to face the inner circumferential surface Tb. Moreover, the axis T1 of the tube T is inclined by a slight angle θ in the horizontal direction with respect to the axes C2 and C3 of the casing 2 and the inner peripheral side roller 3. The inclination angle θ of the tube material T is, for example, 0.5 °.

In addition, for example, a pair of hydraulic cylinders 30 are disposed as inclined members for supporting both side portions of the pipe material T at positions spaced from the casing 2 in the direction of the axis C2 of the casing 2. Each hydraulic cylinder 30 is supported by a support wall 31 provided in the pipe material correcting device 1, and a spherical roller 34 is attached to the tip of a rod 33 protruding from the main body 32. By supporting the outer peripheral surface Ta of the tube material T with the pair of rollers 34 sandwiched, the tube material T is supported so as to be rotatable with respect to the roller 34 so as to advance and retreat.
The pair of hydraulic cylinders 30 can adjust the protruding lengths of the rods 33, and the length of each rod 33 can adjust the inclination angle θ of the tube T (in the axis C <b> 1) in the horizontal plane with respect to the axis C <b> 2 of the casing 2. . In the present embodiment, the tube T has an angle θ on the right side (upper side in FIG. 3) with respect to the axis C <b> 2 and C <b> 3 in the horizontal plane when viewed from the direction facing the axis C <b> 3 of the inner peripheral roller 3 (right side in FIG. 3). Only tilted.

The tube straightening device 1 according to the first embodiment has the above-described configuration. Next, a tube straightening method will be described with reference to FIG.
The tube T to be straightened is, for example, one having a deformation such as a local concave or convex portion on its peripheral surface at one end T1, or a non-circular cross-sectional shape such as an ellipse. It shall have a deformation part with low circularity.
As shown in FIGS. 1 and 2, the tube material correcting device 1 is supported by one end portion T1 of the tube material T being in contact with the lower end portion of the inner surface 2a in the casing 2 as a correction mold surface, and inside the one end portion T1. The side roller 3 is inserted and is in contact with the lower end portion of the inner peripheral surface Tb of the tube material T. Therefore, the tube material T is sandwiched between the contact portion of the casing 2 and the inner peripheral side roller 3.
Further, in FIG. 3, the protruding length of each rod 33 of the pair of hydraulic cylinders 30 is adjusted so that the tube material T is inclined to the axis C2 and C3 in the right direction (R side) by an inclination angle θ in the horizontal plane. And supported by each roller 34.

  When the vertical movement frame 17 is raised by pushing the hydraulic jack 14 installed on the lower side of the rotating means 5, the outer peripheral roller 4 rises together with the driven shaft 10 to press the lower end of the casing 2. To do. As a result, the tubular material T is sandwiched between the inner peripheral side roller 3 and the outer peripheral side roller 4 together with the casing 2 while the tube T is inclined rightward (R side) by a minute angle θ with respect to the axes C2 and C3 in the horizontal plane. Then, the region pressed by the inner peripheral roller 3 is plastically deformed and can be corrected to the correction mold surface of the casing 2.

In this state, when the drive motor 7 is driven and the driven shaft 10 is rotated via the rotary joint 8, the gear 9 rotates integrally with the driven shaft 10, and the outer peripheral roller integrally with the gear 11 meshing with the gear 9 is rotated. 4 rotates. Since the casing 2 rotates around the axis C3, for example, counterclockwise by the rotation of the outer peripheral side roller 4, the region sandwiched between the inner peripheral side roller 3 and the casing 2 of the tube T is plastically deformed in the circumferential direction and the casing 2 is rotated. The correction mold surface is straightened over the entire circumference.
At this time, as shown in FIG. 3, since the tube T is arranged in a state inclined by an inclination angle θ with respect to the axes C2 and C3 in a plan view, the tube T is being corrected while rotating around the axis C1. It moves in the direction of the axis C1, which is a direction away from the inner peripheral side roller 3. That is, the tube material T that moves in the direction of the axis C1 while rotating is displaced in the plastic deformation region sandwiched between the casing 2 and the inner peripheral side roller 3 in the direction of the axial line C1. Can be corrected along the inner peripheral surface 2a of the casing 2, the degree of deformation of the deformed portion is reduced or the elliptical shape is corrected, and the roundness of the tube T is corrected.

Moreover, the example shown in FIG. 4 adjusts the protrusion length of each rod 33 of a pair of hydraulic cylinder 30 which supports the pipe material T in an inclined state in the opposite direction to the example shown in FIG. , C3 and is supported by each roller 34 so as to be inclined in the left direction (L side) in the horizontal plane by an inclination angle θ.
The tube T is sandwiched between the inner peripheral side roller 3 and the outer peripheral side roller 4 while being tilted leftward (L side) by a minute angle θ in plan view with respect to the axes C2 and C3. The area pressed by the side roller 3 is plastically deformed.

In this state, when the driving motor 7 is driven to rotate the outer peripheral roller 4 via the driven shaft 10, the gear 9, and the gear 11, the casing 2 rotates, for example, counterclockwise with respect to the axis C3. T also rotates, and the region sandwiched between the inner peripheral side roller 3 and the casing 2 of the pipe material T is plastically deformed in the circumferential direction, and is corrected over the entire circumference using the inner peripheral surface 2a of the casing 2 as the correction mold surface. .
At this time, as shown in FIG. 4, since the tube T is arranged in a state inclined to the left direction L side by an inclination angle θ with respect to the axes C2 and C3 in a plan view, the tube T rotates around the axis C1. While being corrected, it moves in the direction of the axis C1 in a direction approaching the inner peripheral roller 3. Therefore, the tube material T that moves in the direction of the axis C1 while rotating is displaced in the direction of the axis C1 along the circumferential direction by the plastic deformation region sandwiched between the casing 2 and the inner circumferential side roller 3, so that the inner circumferential roller 3 A region having an arbitrary width wider than the width can be corrected into a perfect circle along the inner peripheral surface 2 a of the casing 2.

As shown in FIG. 3, the drive motor 7 or the gears 9, 11, etc. so that the tube T rotates clockwise in a state where the tube T is inclined to the right direction R side in the plan view by the inclination angle θ. If the rotation transmission mechanism is adjusted, the tube material T is rotationally moved in a direction approaching the inner peripheral roller 3 while the one end T1 is corrected in the circumferential direction, and has an arbitrary width wider than the width of the inner peripheral roller 3. It can be corrected to a perfect circle.
Similarly, as shown in FIG. 4, the drive motor 7 or the gears 9, 11, etc., so that the tube T rotates clockwise in a state where the tube T is inclined leftward by the inclination angle θ in plan view. If the rotation transmission mechanism is adjusted, the tube material T is rotated and moved in the direction away from the inner circumferential side roller 3 while the inner circumferential surface Tb of the one end T1 is corrected in the circumferential direction, over an arbitrary width. It can be corrected to a perfect circle.

  In the tube straightening device 1 according to the first embodiment, as an example, the outer diameter of the tube T is 24 mm, and the inclination angle θ of the axis C1 of the tube T with respect to the casing 2 and the axes C2 and C3 of the inner peripheral roller 3 is 0. In the case of .5 °, when the tube material T is rotated once, the tube material T moves in the direction of the axis C1 of about 1 mm. Therefore, when the tube material T is rotated a plurality of times, the correction width is expanded by 1 mm from the inner rotation side roller 3 by the second and subsequent rotations.

As described above, according to the pipe straightening device 1 according to the present embodiment, the axis C1 of the pipe T is inclined by the inclination angle θ in the horizontal plane with respect to the axes C2 and C3 of the casing 2 and the inner peripheral roller 3. Since the tube material T is sandwiched and rotated by the casing 2 and the inner peripheral side roller 3, the correction region of the tube material T pressed by the inner peripheral side roller 3 is displaced in the circumferential direction and the axis C1 direction every rotation. In addition, the tube material T can be plastically deformed over an arbitrary width wider than the width of the inner peripheral roller 3 to be corrected to a perfect circle shape or a shape close to a perfect circle.
The plastic deformation occurring in the tube T in this case is the same as that of rolling, and the compression deformation in the spiral direction in the line contact region between the inner peripheral roller 3 and the casing 2 and the tube T is circumferentially determined by the constant volume rule. Converted to stretch deformation to. Elongation deformation in the circumferential direction is constrained by the inner peripheral surface 2a of the casing 2 in the deformation direction, and the deformation of the shape of the tube material T progresses following the shape of the inner peripheral surface 2a of the casing 2. To do. As a result, effective correction of the deformed portion of the tube material T is performed.

Moreover, according to the pipe material correction apparatus 1 of this embodiment, the correction width of the pipe material T can be arbitrarily changed continuously by correcting the rotating pipe material T while moving it in the circumferential direction and the axis C1 direction. In addition, the working time can be shortened and the apparatus can be downsized.
Further, when the tube material T is inclined, a large force is applied with a small acting force by holding the tube material T by the pair of hydraulic cylinders 30 at a position away from the press-contacting action point sandwiched between the casing 2 and the inner peripheral roller 3. The tube T can be easily inclined. In addition, since the tube material T is supported by the spherical roller 34 of the hydraulic cylinder 30, the tube material T can be supported while allowing the tube material T to rotate and move in the direction of the axis C1.

In addition, the pipe material correction apparatus 1 by this invention is not limited to 1st embodiment mentioned above, In the range which does not deviate from the summary of this invention, a suitable change, substitution, etc. are possible. Next, other embodiments and modifications of the present invention will be described, but the same or similar parts and members as those of the above-described embodiment will be denoted by the same reference numerals, and description thereof will be omitted.
FIG. 5 shows a tube straightening device 40 according to a modification of the tube straightening device 1 according to the first embodiment. In this variation, the small diameter portion 24b of the support shaft 24 of the inner peripheral side roller 3 is the above-mentioned small diameter. It is set longer than the part 24a. In addition, the fixed frame 16 that supports the outer peripheral roller 4 is placed on the machine base 13 so as to be separated from the support base 23 so that the axial region further deeper than the one end T1 in the tube T can be corrected. Yes.

When configured in this way, for example, as shown in FIGS. 3 and 4, the tube T is inclined with respect to the axis C <b> 2 of the casing 2 and the axis C <b> 3 of the inner peripheral roller 3 so that the axis C <b> 3 forms an inclination angle θ in plan view. When the outer peripheral side roller 4 is rotated by being sandwiched between the outer peripheral side roller 4 and the inner peripheral side roller 3, the tube T is inner and the inner peripheral surface Tb is in the circumferential direction and the direction of the axis C <b> 1. And is rotationally moved in a direction away from or closer to the inner peripheral side roller 3.
Therefore, the tube material T can be corrected to a perfect circle shape or a shape close to a perfect circle over an arbitrary width wider than the inner peripheral side roller 3 on the inner back side from the one end T1. And if the length of the thin diameter part 24b of the support shaft 24 of the inner peripheral side roller 3 is set longer than the pipe material T, the casing 2 and the outer peripheral side roller 4 are moved while rotating the pipe material T, so that the total length Can be straightened over a long period of time.

Next, the pipe material correcting device 50 according to the second embodiment of the present invention will be described with reference to FIG. 6, and FIG. 6 discloses an arrangement configuration showing the interrelationship of the casing 2, the pipe material T, and the inner peripheral roller 3, The rest of the configuration is omitted because it is substantially the same as that of the tube straightening device 1 shown in FIG.
In the pipe straightening device 50 shown in FIG. 6, the pipe T and the casing 2 are set so that the axes C1 and C2 are substantially coaxial, and the inner circumferential roller 3 has the axis C3 with respect to the axes C1 and C2. It is installed at a position inclined by an inclination angle θ in plan view.

That is, the inner peripheral roller 3 is provided with a cylindrical portion 51 in which a substantially cylindrical space 51 a is formed on a support base 23 installed on a machine base 13 (not shown), and the inner peripheral roller 3 is provided with an inner peripheral space 51 a. A support shaft 24 of the side roller 3 is installed. The support shaft 24 is formed so that its outer diameter is smaller than the inner diameter of the cylindrical portion 51, and its angle can be changed.
One or a plurality of sets, for example, two sets of hydraulic jacks 52 a and 52 b are installed in the cylindrical portion 51, and the rods 53 a and 53 b of the hydraulic jacks 52 a and 52 b pass through the cylindrical portion 51 and are connected to the support shaft 24. Yes. And the inclination | tilt angle (theta) of the inner peripheral side roller 3 is set by adjusting expansion / contraction of the length of each rod 53a, 53b.
Since the pipe material correcting device 50 according to the second embodiment has the pipe material T installed coaxially with the casing 2, the hydraulic cylinder 30 as an inclined member is not provided.

According to the pipe straightening device 50 according to the second embodiment, the lower end portion of the pipe T is pressed against the casing 2 and the axis C1 and C2 of the pipe T with the inclination angle θ with respect to the casing 2 and the pipe T. The tube material T is held in pressure contact with the inner peripheral side roller 3 and the casing 2.
Therefore, at the time of straightening the tube material T, the tube material T is plastically deformed in a region where the inner circumferential side roller 3 and the casing 2 are in pressure contact with each other. Since T moves in the direction of the axis C1 while rotating around the axes C1 and C2 together with the casing 2, the pipe T is straightened in the circumferential direction and the axial direction, and the straightening width of the pipe T can be continuously changed.

As described above, also in the tube material correcting device 50 according to the second embodiment, the tube material T can be moved in the direction of the axis C1 while rotating around the axis C1, so that the tube material T pressed by the inner peripheral side roller 3 can be moved. The straightening region can be displaced in the circumferential direction and the direction of the axis C1, and the tube T is plastically deformed over an arbitrary width wider than the width of the inner peripheral side roller 3 to be a perfect circle or a shape close to a perfect circle Can be corrected.
In addition, according to the present embodiment, the correction width of the tube material T can be arbitrarily changed continuously by rotating the tube material T in the circumferential direction while moving the tube material T in the direction of the axis C1, so that the work time can be changed. The apparatus can be reduced in size by shortening.

Next, a pipe material correcting device 60 according to a third embodiment of the present invention will be described with reference to FIG. 7. FIG. 7 shows an arrangement configuration showing the interrelationship among the casing 2, the pipe material T, and the inner peripheral side roller 3 as in FIG. 6. The remaining configuration is omitted because it is substantially the same as that of the tube straightening device 1 shown in FIG.
In the tube straightening device 60 shown in FIG. 7, the tube T and the inner peripheral side roller 3 are set so that their axes C1 and C3 are substantially coaxial, and the casing 2 has its axis C2 with respect to the axes C1 and C3. It is installed in a posture that is inclined by an inclination angle θ in plan view.

In the pipe material correcting device 60 according to the present embodiment, the casing 2 is slidably supported by a substantially ring-shaped support frame 61 disposed on the outer peripheral side thereof, and the support frame 61 is, for example, a frame 62 having a substantially U-shaped cross section. It is held rotatably. And in the position which opposes the casing 2, the cylinder part 51 supported on the support stand 23 and supporting the support shaft 24 of the inner peripheral side roller 3, and the fixed substantially U-shaped cross section fixed to the both sides The part 63 is installed. The support shaft 24 is fixedly disposed in the space 51 a of the cylindrical portion 51.
A hydraulic jack 64 is fixed in each fixing portion 63 on both sides of the support shaft 24, and a frame 62 of the casing 2 is attached to a rod 66 protruding from the main body 65 of each hydraulic jack 64 through the flange portion of the fixing portion 63. It is connected. And the length of the rod 66 of the two sets of hydraulic jacks 64 is set shorter than the other, so that the casing 2 can be tilted and held at the tilt angle θ in the plan view described above.

According to the pipe material correcting device 60 according to the third embodiment, the tubular material T is moved by the hydraulic jack 14 in a state where the casing 2 is inclined at the inclination angle θ with respect to the inner circumferential side roller 3 and the axes C1 and C3 of the tube material T. The inner peripheral side roller 3 and the casing 2 are pressed against and sandwiched.
Therefore, when straightening the tube material T, the tube material T is plastically deformed in a region where the inner circumferential side roller 3 and the casing 2 are in pressure contact with each other. The tube T that rotates around the tilted axis C2 and moves together is moved in the direction of the axis C1 while rotating around the axis C1. Then, the tubular material T pressed against the casing 2 has an arbitrary width wider than the width of the inner peripheral roller 3 because the correction region plastically deformed with the inner peripheral roller 3 is continuously displaced in the direction of the axis C1. Can be straightened.

As described above, also in the pipe material straightening device 60 according to the third embodiment, the straightening region of the pipe material T pressed by the inner peripheral side roller 3 can be displaced in the circumferential direction and the axial direction. It can be plastically deformed over an arbitrary width wider than the width of the circumferential roller 3 to correct the shape into a perfect circle or a shape close to a perfect circle.
Further, according to the present embodiment, the correction width of the tube material T can be arbitrarily changed continuously by rotating the tube material T in the direction of the axis C1 while rotating the tube material T in the circumferential direction. It can be shortened and the apparatus can be miniaturized.

In the tube straightening devices 50 and 60 according to the second embodiment and the third embodiment, not only the one end portion T1 of the tube material T but also the small diameter portion 24a of the support shaft 24 that supports the inner peripheral roller 3 is set long. In addition, since the rotating means 5 including the outer peripheral side roller 4 is separated from the support base 23 and set at a position facing the inner peripheral side roller 3, the pipe T can be moved while being rotated. Correction processing can be performed over the inner depth and the entire length.
Moreover, in the pipe material correction apparatuses 1, 40, 50, and 60 according to the above-described embodiments, the case where the correction region of the tube material T is one end portion T1, the inner back portion, or the entire length has been described as an example. Without being limited to these, any part of the tube T in the direction of the axis C1 may be used.

Further, in each of the above-described embodiments and modifications, the hydraulic jack 14 is used as the pressing means of the casing 2, but the pressing means is not limited to this, and an electric jack having a motor or the like can be used as appropriate.
In each of the above-described embodiments and modifications, a hydraulic jack 14 or an electric jack that presses the outer roller 4 against the casing 2 is provided as a pressing means. A hydraulic jack, an electric jack, or the like that presses against the inner peripheral surface Tb of the pipe T and presses the pipe T between the casing 2 may be provided as the pressing means.

Further, in each of the above-described embodiments and modifications, the lower end portion of the tube material T is press-contacted by the inner peripheral roller 3 and the casing 2, but the position where the tube material T is pressed-contacted is not limited to the lower end portion. Needless to say.
Moreover, the material which forms the pipe material T is not limited to steel materials, Arbitrary materials, such as steel, copper, brass, and aluminum, can be used and are not specifically limited.

1, 40, 50, 60 Pipe material straightening device 2 Casing 3 Inner circumferential roller 4 Outer circumferential roller 5 Rotating means 14 Hydraulic jack 64 Hydraulic jack T Tubing material

Claims (7)

A pipe material straightening device that corrects the roundness of the pipe material,
A ring-shaped casing that is disposed on the outer peripheral surface of the tube material and has an inner peripheral surface formed in a circular cross section facing the outer peripheral surface of the tube material;
An inner peripheral roller disposed in contact with the inner peripheral surface of the pipe member;
A pressing means for plastically deforming the tubular material using the inner circumferential surface of the casing as a correction mold surface by applying a pressing force between the inner circumferential surface of the casing and the outer circumferential surface of the tube;
A rotating means for rotating the casing and the pipe around its axis;
Any one of the axis of the tube, the axis of the casing, and the axis of the inner peripheral roller is disposed to be inclined with respect to the other two axes, and when the tube is rotated, the tube A tube straightening device characterized by moving in a direction.   The pipe straightening device according to claim 1, wherein an axis of the pipe is inclined with respect to an axis of the casing and an axis of the inner peripheral side roller.   2. The pipe straightening device according to claim 1, wherein an axis of the casing is disposed to be inclined with respect to an axis of the pipe and an axis of an inner peripheral roller.   2. The pipe straightening device according to claim 1, wherein an axis of the inner peripheral roller is disposed to be inclined with respect to an axis of the pipe and an axis of the casing.   The pipe straightening device according to claim 2, further comprising an inclined member that tilts the pipe and supports the outer peripheral surface of the pipe so as to be rotatable and movable.   The pipe material correcting device according to claim 5, wherein the inclined member supports a position separated in an axial direction of the pipe material from a position where the inner circumferential surface of the pipe material is pressed by an inner circumferential side roller.   The pipe material correcting device according to any one of claims 1 to 5, wherein a gap is formed between the casing and the pipe material in a region other than a region where the inner peripheral roller is pressed against the pipe material. .

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