JPH0970623A - Method and equipment for bending shape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bending method of a shape capable of smooth bending of even small radius of curvature by perform the bending through a first and second bending processes using a first bending die and a second bending die. SOLUTION: First and second bending dies 2, 3 in which groove parts of the shape to be obtained by the bending on the roll-shaped peripheral surface are formed are arranged so that a shape W is fitted to the groove part, and the other end of the shape W is held by a tail part 2b provided on the first bending die 2. The shape W is bent by outwardly turning the first and second bending dies 2, 3. After the first bending process, the first and second bending dies 2, 3 are fixed in a non-turnable manner, and the second bending process is performed in which fitting bases 4 of the first and second bending dies 2, 3 are turned in the direction to wind the shape W around the second bending die 3 by a rotary shaft of the second bending die 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending method and a bending apparatus for performing a three-dimensional bending process on a profile, particularly an aluminum alloy extruded profile.

[0002]

2. Description of the Related Art Extruded aluminum alloy materials used as structural members for automobile frames, building materials, ships, etc. are three-dimensionally bent in the vertical and horizontal directions with respect to their axes depending on the application. Sometimes. The three-dimensional bending process according to the present invention means (a) -an external perspective view of FIG. 9, (b).
As shown in the example of the extruded profile having a rectangular cross section in the view of arrow A and the view of arrow (c) -B, a straight profile having a width W and a height H is machined in the vertical direction A. In the range of the area C _1, the radii of curvature R ₁ , R ₂
Bending is performed by this, and by this bending, a displacement difference D ₁ is provided between the centers of the shape members, and bending of radiuses of curvature R ₃ , R ₄ is performed in the range of the processing area C ₂ as viewed in the horizontal direction B,
This bending process means a bending process that causes a displacement difference D ₂ between the centers of the shape members.

In order to perform such a three-dimensional bending process on a work as a shape member, there is a method of using a bending device provided with a fixing metal fitting called so-called push-bend (multi-bender) and a movable gyro die. It is common. That is, in the work that is forcibly pressed and moved through the work insertion hole provided in the fixing metal fitting and the gyro mold,
In particular, it is a method of giving three-dimensional bending with the exit side portion as a fulcrum.

Alternatively, tensile pressing bending (draw bender), which is a method applying tensile bending, may be used.

[0005]

The three-dimensional bending process by the multi-bender is effective for a bending process having a relatively large radius of curvature, but as the radius of curvature becomes smaller, the inner part of the bending process is It is not suitable for three-dimensional bending with a small radius of curvature because it has problems such as wrinkles becoming easier and buckling. Further, in the case of a draw bender, it is necessary to perform the bending of FIGS. 9B and 9C in two steps, and if minute defects such as'wrinkles' occur in the first step, It will break from the two-step bending process, which is also unsuitable for three-dimensional bending with a small radius of curvature. Furthermore, the conventional three-dimensional bending method has problems that the equipment for bending work becomes large-scale and the working time is relatively long.

The present invention was devised in order to solve the above-mentioned problems. In the three-dimensional bending process of a shape member, even if the bending process is performed with a small radius of curvature, the occurrence of the above-mentioned "wrinkles" or , A bending method and a bending apparatus for a shape member in which breakage of a member due to occurrence of'wrinkles' is less likely to occur. Moreover, it aims at providing the bending apparatus which can change the shape of the groove part for performing bending.

[0007]

In order to solve the above-mentioned problems, the present invention is a bending method for three-dimensionally bending a shape (W) in a direction vertical and a horizontal direction with respect to its axis. The peripheral surface contacting the shaped member has a roll shape having radii corresponding to R ₁ and R ₂ shown in FIG. 9 (b) and has a rotating shaft (2a, 201, 3a, 301) and As shown in FIG.
First and second bending dies (2,200, in which grooves (5) having a shape corresponding to R ₃ and R ₄ shown in (c) are formed.
3, 300) are disposed so as to face each other so that the shape members fit into the mutual groove portions, and the shape members fix one end side of the shape members so as to be movable in the axial direction, A step of gripping an end side by a tail portion (2b) provided on the first bending die, and a step of holding the first and second bending die first.
A first bending step in which the profile is bent by mutually rotating in the direction in which the profile is wound around the bending mold, and the first
And a second bending die fixed non-rotatably,
And a second bending in which the mounting base (400) of the second bending die is rotated in the direction in which the profile is wound around the second bending die by the rotation axis of the second bending die. A method for bending a profile is characterized by comprising the steps of:

Further, during the first bending step and the second bending step, the direction of the straight portion of the unshaped portion and the first bending portion
So that the tangent direction of the groove portion at the processing position of the second bending mold or the second bending mold is the same.
The bending method of the profile is performed by relatively moving the position of the bending mold in the direction of the rotation axis and / or the inclination of the rotation axis and the fixed position on the one end side of the profile. is there.

In the first and second bending steps, a core (8) is placed inside the profile at a position where the core (8) abuts against the first and second bending molds to perform the bending process. This is the method of bending the material.

Further, during the bending process of the shape member, a method of bending the shape member is applied in which a predetermined tensile axial load is applied to a portion of the shape member whose one end is fixed.

A bending device for three-dimensionally bending a shape in a vertical direction and a horizontal direction with respect to its axis, wherein a groove portion having a shape to be obtained by bending is formed on a peripheral surface. First and second bending processes that are rotatable on a rotary shaft and that move in the axial direction of the rotary shaft according to the shape of the groove portion to machine the profile at a predetermined machining position. And a mounting base (400) to which the first and second bending dies are integrally attached. One end of each of the first and second bending dies moves in the axial direction. It should be attached by sandwiching it from both sides of the profile that is fixed as much as possible and the other end is gripped by the tail of the first bending mold so that the profile and the groove fit at the machining position. It is arranged on the base and is rotated by each rotating shaft to perform the first bending process. Following the first bending, the mounting base rotates the mounting base as a whole in a direction opposite to the direction of the first bending, with the rotation axis of the second bending die as an axis. Second bending process is performed, and at the time of the first and second bending processes, the direction of the straight part of the profile that is the unprocessed part and the tangential direction of the groove part of the first and second bending dies. Is tilted so as to match at the processing position.

Further, the first and second rotary shafts of the first and second bending dies and the first and second rotary shafts are interlocked to rotate the first and second rotary shafts. And a first bending mold for rotating the second bending mold for the first bending process.
And a second driving unit (400A) for moving the first and second bending dies to perform bending at the predetermined position on the axes of the first and second rotating shafts. Drive unit (400B), the first and second bending dies, the first and second rotation shafts, and the first and second drive units for integrally supporting the first and second bending dies. The first base (400) is coaxially connected to the second rotation shaft and the first base (400).
Third pivot shaft (501) for supporting the base of the first base for pivoting the first base around the second rotary shaft for the second bending process. And a third drive unit (500A) for rotating the third rotation shaft,
A second base plate (500) for integrally supporting the third rotating shaft and the third driving unit, a direction of a straight portion which is a non-machined portion of the profile, and first and second In order to match the tangential direction of the groove portion of the second bending mold at the processing position, the second base is not processed at the processing positions of the first and second bending molds. The third base (6) that pivotally supports in a line orthogonal to the direction of the straight line part (6)
00) and a fourth for tilting the third base.
The drive unit (600A) is provided.

Further, each of the first and second bending dies has a rotating skeleton (20, 30) and a groove portion forming member detachably attached to the peripheral surface of the rotating skeleton so as to be replaceable. A bending device for a profile having (10a to) is provided.

In the above structure, in the first aspect, one end of the profile is fixed so as to be movable in the axial direction, and the other end of the profile is held by the tail portion of the first bending die. The first and second bending molds are arranged from both sides so as to fit the shape member into the groove formed on the peripheral surface of the first and second bending molds. And the 1st bending process which rotates the 2nd bending mold mutually in the direction which winds a profile on the 1st bending mold is mutually performed. Thereby, the bending of R ₁ (see FIG. 9) is performed with the outer shape of the first bending die, and the bending of R ₃ is performed according to the curved condition of the groove.

Next, the first and second bending molds are fixed so as not to rotate, and in this state, the mounting base is bent to the second bending shaft with the rotating shaft of the second bending mold as an axis. It is rotated in the direction in which the profile is wound around the processing die. This allows
The profile is subjected to the bending process in the second step, the R ₂ is bent according to the outer shape of the second bending die, and the R ₄ is bent according to the curved condition of the groove.

According to a second aspect of the present invention, in the first and second bending steps, the first and second bending dies are provided with axes of a rotating shaft thereof depending on a bending direction of the shape of the groove. Moving on the line and / or tilting the pivot axes of the first and second bending dies. That is, the direction of the straight portion, which is the unprocessed portion of the profile, is made to coincide with the tangential direction of the groove portion at the processing position of the first or second bending die.
That is, for example, if the groove is curved upward,
The first and second bending dies are moved downward on the axis of the rotation shaft. In this way, as the bending process progresses, the first and second grooves are formed depending on the bending direction of the groove.
By moving the bending mold of (1) on the axis of the rotating shaft thereof, the abutting positions of the shape member and the first and second bending molds become substantially constant, and at this substantially constant position. Bending is performed.

According to the third and fourth aspects, the bending is performed without causing unnecessary deformation or breakage of the profile during bending. In particular, in claim 4, as the bending process progresses, the mounting base is tilted so that the axis of the shape member whose one end is fixed and the tangent direction of the bending curve of the groove portion are substantially aligned with each other. Coupled with the action, the profile is smoothly fitted into the groove and bent.

According to the fifth and sixth aspects, it is possible to realize an apparatus suitable for the method for bending the profile according to the first and second aspects. In the seventh aspect, when performing bending with different processing shapes, the groove forming body can be removed and replaced with a new groove forming body, and the main body of the rotating skeleton can be used as it is.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. In the following description, the principle of the present invention will be described with reference to FIGS. 1 to 4, and with reference to FIG. 5 and FIG. A specific embodiment will be described.

FIG. 1 is a plan view of a shape bending apparatus 1 for carrying out the method for bending a shape according to the present invention, in which a shape W consisting of a square tube made of aluminum or aluminum alloy is used. The first bending mold (hereinafter referred to as the first processing roll) 2 and the second bending mold (hereinafter referred to as the second processing roll) 3 were fitted and sandwiched in the groove portions. It is a top view showing a state. Further, FIG. 2 is a diagram in which the first bending process is performed, and FIG. 3 is a diagram in which the second bending process is performed.

In the figure, the bending apparatus 1 for this shape member has a mounting base 4 and a first working roll 2 and a second working roll 3 which are rotatable relative to each other by rotating shafts 2a and 3a. Are arranged. The diameter of each of the first and second processing rolls 2 and 3 and the curved shape of the groove formed on the peripheral surface of the first and second processing rolls 2 and 3 are determined in consideration of the shape to be obtained by bending and the springback described later. Grooves 5 are formed as shown in FIGS. 7A and 7B, which will be described later in detail. In addition, the first and second processing rolls 2 and 3
Is movable in the axial direction of the rotary shafts 2a and 3a as described above. Further, the first processing roll 2 is provided with a tail portion 2b for holding the profile W on an extension of the axis of the profile W.

One end of the shape member W has guides 7a and 7b.
Due to this, when the profile W is bent from both sides,
And the second processing rolls 2 and 3 are fixed so as not to hinder the movement of the second processing rolls 2 and 3 in the arrangement direction, and the other end is the first
The processing roll 2 is gripped by the tail portion 2b. At the start of the first bending step, the core 8 attached to the attachment rod 8a is inserted into the profile W. In addition, one end of the shape member W is
The pulling rollers 9a and 9b are brought into contact with each other from both sides of the profile W to rotate them, and the pulling rollers 9a and 9b are rotated with resistance in the directions of the arrows to rotate, whereby a tensile axial load F is applied to the profile W.

FIG. 2 is a diagram for explaining the first bending step. As shown, the first and second processing rolls 2, 3
In the direction in which the profile W is wound around the first processing roll 2, that is, in the drawing, the first processing roll 2 is clockwise and the second processing roll 3 is counterclockwise. The first bending process is applied to the profile W by rotating the profile. As another embodiment,
Only the first processing roll 2 may be rotated, and in this case, the second processing roll 3 is driven by the rotation of the first processing roll 2 to move. It rotates in the opposite direction to the rotation direction of. During the first bending process and the second bending process to be described next, the first and second processing rolls 2 and 3 are respectively provided with rotating shafts 2a and 2a in order to smoothly perform the bending process. While moving along the axis of 3a, the tilting movement of the mounting base 4 is also performed, and this point will be collectively described later.

FIG. 3 is a diagram for explaining a second bending process performed after the first bending process shown in FIG. In the second bending step, the first and second processing rolls 2 and 3 are fixed so as not to be rotatable by the rotation shafts 2a and 3a thereof, and in this state, the mounting base 4 is fixed to the second base. With the rotation shaft 3a of the processing roll 3 as the rotation shaft, the rotation is performed in the counterclockwise direction which is the opposite direction to the first processing direction.

4 (a), (b) and (c) show the movement of the first and second processing rolls 2 and 3 on the axes of the rotation shafts 2a and 3a and the tilting of the mounting base 4. It is a figure which shows the tilting by operation. The bending process progresses from each side. In the figure, (b) shows the shape of the material W on the first and second processing rolls 2 and 3 as shown in FIG.
It shows a state in which the bending process is started by sandwiching the pin. FIG. 6A shows the shape of the groove portion 5 formed in the first processing roll 2 as viewed from the direction of arrow A at the start of the bending process. The axis l ₁ is the first processing roll 2
(And the second processing roll 3) is the center line in the vertical direction, and the line l ₂ is also the center line in the horizontal direction.

FIG. 6C shows the position of the first working roll 2 (and the second working roll 3) at the start of bending. The line L is a processing line for the profile W, and the axis line at the start of processing of the unprocessed portion of the profile W to which one end is fixed is the processing line. Bending of the shape member W is performed on this processing line. That is, the first processing roll 2 (and the second processing roll 3) is raised toward the processing line L in the drawing in accordance with the curve of the groove portion 5 as it is rotated for bending, or Lower and bend. As described above, the bending of the profile W is performed at the intersection of the processing line L, which is a substantially constant position, and the line connecting the first and second processing rolls 2 and 3. In the figure (c), since the starting end 5a of the groove 5 is located above the longitudinal center line by h ₁ , the first processing roll 2 (and the second processing roll) is correspondingly moved. 3) is in the lowered position.

Next, the first working roll 2 (and the second working roll 3) rotates as shown in FIG.
(A) figure has shown the shape of the said groove part 5 of the 1st processing roll 2 in this case. As shown, groove 5
Is curved downward, the first processing roll 2 (and the second processing roll 3) is, on the contrary, gradually moved upward in accordance with the curve of the curve as the rotation progresses. Let me let you go. Further, as described above, in order to match the tangential direction of the curved line of the groove portion 5 with the axial direction of the profile W, that is, the processing line L, the first processing roll 2 (and the second processing roll 3). Tilt to the angle θ ₁ . The tilting of the first working roll 2 (and the second working roll 3) can be performed by tilting the mounting base 4 around the working position.

FIG. 2B shows the end of the first bending step and the state of FIG. (A) Figure shows
The shape of the groove portion 5 of the first processing roll 2 at this time is shown. In order to match the tangential direction of this curve with the axial direction of the profile W, that is, the machining line L, corresponding to the curve of the groove 5, the first and second machining rolls 2 and 3 are moved along the axis l.
_{The first} working roll 2 (and the second working roll 3) is further tilted by an angle θ ₂ by moving the mounting base 4 in _one direction up and down.

Upon completion of the first bending process,
(B) As shown in the figure, a second bending step is performed. That is, in the second bending step, as described above, the first and second processing rolls 2 and 3 are non-rotatably fixed by the rotation shafts 2a and 3a, and the second processing roll is also fixed. The mounting base 4 is rotated in the opposite direction to the first bending process with the rotating shaft 3a of 3 as the rotating shaft. FIG. 6A shows the shape of the groove portion 5 on the processing position side of the second processing roll 3 at this time as viewed from the direction of arrow A, and the tangential direction of the curve of the groove portion 5 and the axial line of the profile W, that is, the processing line. In order to make L coincide with L, the second working roll 3 is tilted at an angle θ ₃ by moving the first working roll 2 in the direction of the axis l ₁ and tilting the mounting base 4.

FIG. 3B shows the end of the second bending step, which is the state shown in FIG. FIG. 6A shows the shape of the groove 5 at this time. In the end of this bending, the end edge 5b of the groove 5, h ₂ from the center line l ₂
Since the first processing roll 2 (and the second processing roll 3) is located at the lower position by that much, the first processing roll 2 (and the second processing roll 3) is in the raised position. Further, since the starting end 5a of the groove portion 5 shown in FIG. 7C and the ending end 5b of the groove portion 5 shown in FIG. 5C are straight lines that coincide with the machining line L, the mounting base 4 is tilted at this time. Therefore, the first processing roll 2 and the second processing roll 3 are also upright without tilting.

FIG. 5 is a front view showing an embodiment of the apparatus for bending a profile according to the present invention, and FIG. 6 is a schematic perspective view. The front view of FIG. 5 is shown by cutting out a main part. In the figure, the bending apparatus 100 for this profile is shown as the first base 4
00, a second substrate 500, and a third substrate 600. First, the first base 400 will be described. The first base 400 includes a first processing roll 200 (see the processing roll 2 shown in FIG. 1 and the like) and a second processing roll 300 (the above-mentioned processing roll 2). Processing rolls 3) are rotatably arranged on rotating shafts 201 (see the rotating shaft 2a) and 301 (see the rotating shaft 3a), respectively. Grooves 5 as shown in FIGS. 4 and 7 are formed on the peripheral surfaces of the first and second processing rolls 200 and 300, but the illustration thereof is omitted. Further, the first processing roll 200 is provided with the tail portion 2b of the profile W shown in FIG. 1 and the like, but the illustration thereof is omitted. Reference numeral G in FIG.
Is the processing position, and the processing line L shown in FIG.
This is a line that passes from the front of the drawing to the other side at the processing position G.

The rotating shafts 201 and 301 are elongated spline shafts that penetrate the first and second processing rolls 200 and 300, and serve as bearings on the upper plate 401 and the lower plate 402 of the first base 400, respectively. And is rotatably supported (which will be described later, to be precise, the rotation shaft 201 is attached to bearings arranged on the upper and lower slide plates 415 and 416). The first and second processing rolls 200 and 300 have respective rotating shafts 201 and 301.
It meshes with and moves up and down, but this point will be described later.

The upper plate 401 includes rotating shafts 201, 30.
By rotating 1 the first and second processing rolls 2
First drive mechanism 400A for rotating 00, 300
Are arranged. The first drive mechanism 400A includes a worm gear 4 driven by rotation of the handle portion 403.
04, a gear 405 meshing with the worm gear 404,
A gear 406 coaxially fixed to this gear 405, a gear 407 meshed with this gear 406, a gear 408 coaxially fixed to this gear 407, a gear 409 meshed with this gear 408, this gear The gear 409 and the gear 410 are coaxially fixed to the first rotary shaft 201 and the second rotary shaft 301, respectively. The rotating shafts 201 and 301 are rotated by rotating the handle portion 403, and the first and second processing rolls 200 and 300 are rotated by this rotation. The above is the first drive mechanism 40.
It has a configuration of 0A.

The second drive mechanism 400B includes the first and second drive mechanisms.
The processing rolls 200, 300 of the rotary shafts 201, 301
It moves (moves up and down) on the axis of. That is, the positions of the groove portions (see reference numeral 5 shown in FIG. 4, FIG. 7, etc.) formed in the first and second processing rolls 200, 300 are the processing positions G (see FIG. 5: processing shown in FIG. 4). When it is above the line L), the first and second processing rolls 200 and 300 are moved downward, and when the position of the groove 5 is below the processing position G, the first and second The processing rolls 200 and 300 are moved upward so that the bending is always performed at the processing position G.

First, the first and second processing rolls 20
The 0 and 300 are rotatably fitted to the moving plate 411 at the lower part thereof, and the moving plate 411 is attached to the first base 4
00 are attached to the guide rods 412 to 412 which are erected at the four corners thereof at their respective positions. Also, the first
A rotatable screw rod 414 having a handle portion 413 penetrates through the upper plate 401 of the base plate 400 of the lower plate 402.
The moving plate 411 is screwed to the screw rod 414 at a predetermined position. Therefore, by rotating the handle portion 413 in the normal direction and reversing the direction, the moving plate 411 is guided by the guide rods 412 to move up and down,
By this vertical movement, the first and second processing rolls 200,
The 300 also moves up and down.

Further, the first processing roll 200 can be slightly moved in the lateral direction (the horizontal direction in the drawing in FIG. 5). That is, when performing a bending process for a shape member having a slightly different width dimension, as shown in FIG. 1 and the like, the first processing roll 200 (2) and the second processing roll 300 (3) are Therefore, the first processing roll 200 can be moved in the lateral direction in preparation for this.

The lateral movement of the first processing roll 200 is performed by laterally moving the rotary shaft 201. First, the rotating shaft 201
At the upper and lower parts thereof are slide plates 415 and 416.
The slide plates 415 and 416 are rotatably mounted by bearings arranged on the slide rail 41.
7 and 418 are fitted to each other so as to be slidable in the lateral direction (the lower slide plate 416 and the slide rail 418 are not shown in FIG. 6). And
Bolts 419 and 420 are attached to the slide plates 415 and 416.
The tip end of the bolt is rotatably embedded, and the bolts 419 and 420 are screwed to the outer plates 421 and 422. Therefore, by rotating the bolts 419 and 420 forward or backward, the slide plates 415 and 41
6 moves in the left-right lateral direction, which causes the rotating shaft 201 to move in the left-right lateral direction.
00 also moves laterally left and right. In order to respond to changes in the bending radius determined by the roll radius,
In addition to changing the roll and moving the shafts by the slide plates 415 and 416, it is also necessary to change the combination of gears forming the first drive unit.

Next, the second board 500 will be described. The second base plate 500 is for rotating the entire first base plate 400 for the first bending process shown in FIG. 2 to the second bending process shown in FIG. That is, the first base 400 is fixedly mounted on the first base rotation shaft 501 at the lower plate 402 portion thereof, but the first base rotation shaft 501 is fixed to the upper plate 502. And lower plate 50
It is arranged so that it can rotate coaxially with the rotating shaft 301 by means of bearings arranged in 3.

A third drive mechanism 500A for rotating the first base rotation shaft 501 will be described. The drive mechanism 500A includes a worm gear 505 rotated by the rotation of the handle 504, a gear 506 meshed with the worm gear 505, a gear 507 coaxially fixed to the gear 506, and a gear 508 meshed with the gear 507. The gear 509 is connected to a gear 509 coaxially fixed to the gear 508, and the gear 509 meshes with a gear 510 coaxially fixed to the first base pivot shaft 501. Therefore, the first base pivot shaft 501 can be rotated by operating the handle portion 504. A line K1 shown by a chain line in FIG. 5 is a rotation axis of the first base rotation shaft 501.

Next, the third substrate 600 will be described. The third base board 600 is the base of the entire bending apparatus 100 for the shape members, and as shown in FIG. 4, the third base board 600 is tangential to the groove portion 5 along the axial direction of the unprocessed portion of the shape member as the bending process progresses. The second base 500 for matching
To tilt. That is, the third base 600
Support plates 602 and 603 are provided upright at both ends of an installation plate 601 installed on a predetermined floor surface.
A supporting shaft base 604 is fixedly mounted on the second supporting base 604, and a supporting shaft 605 rotatably supported by the supporting base base 604 is provided on the second base 5.
00 side plate 511. A supporting shaft 606 is fixedly mounted on the other supporting plate 603, and a supporting shaft 607 rotatably supported by the supporting shaft 606 is attached to the side plate 512 of the second base plate 500. It is fixed. A dashed-dotted line K2 shown in FIG. 5 is a tilting axis of the second substrate 500 and passes through the processing position G. The second base plate 500 is designed to be tilted on both the front side and the other side on the tilt axis K2 in the drawing of FIG.

Reference numeral 600A is a fourth drive mechanism for tilting the second base plate 500. This fourth drive mechanism 60
OA is a worm gear 609 which is rotated by the rotation of the handle portion 608, a gear 610 which meshes with the worm gear 609, and a gear 61 which is coaxially fixed to the gear 610.
1, connected to a gear 612 that meshes with the gear 611. Since the gear 612 is coaxially fixed to the support shaft 607 fixed to the side plate 512 of the second base plate 500, the second base plate 500 is fixed by rotating the handle portion 608. It can be tilted about the tilt axis K2.

A bending device 1 for a shape member having the above-described structure
00 operation will be described with particular reference to FIG. It is assumed that the groove portions 5 having the shape shown in FIG. 4 are formed on the peripheral surfaces of the first and second processing rolls 200 and 300. First,
First processing roll 200 and second processing roll 300
In order to sandwich the profile W at the processing position G (see FIG. 5) between them, the second drive mechanism 400B is operated to move the first and second processing rolls 200, 300 to the rotary shafts 201, 301.
On the axis of. In FIG. 4, since the groove portion 5 is located above [in (a) and (c) of FIG. 4],
On the contrary, the first and second processing rolls 200 and 300 are moved downward. The profile W is sandwiched between the first and second processing rolls 200 and 300 that have completed this movement, and the profile is gripped by the tail portion (see 2b in FIG. 1) [see FIGS. 1 and 4 (b)]. ]. The core 8 shown in FIG. 1 and the like is inserted inside the shape member. The front side of the shape member is grasped by a gripping device that has a guide (not shown) and holds the shape member and applies a predetermined tensile load to the shape member. Good.

Next, by operating the first drive mechanism 400A, the first and second processing rolls 200, 300 are rotated to perform the first bending process [FIG. 2, FIG. 4 (a),
Refer to (b) and (c)]. At this time, depending on the shape of the groove portion 5, the first drive mechanism 400A and the second drive mechanism 4
00B and the fourth drive mechanism 600A are simultaneously operated. That is, for example, in FIG. 4A, FIG. 4B, and FIG. 4C, the groove portion 5 curves downward with the operation of the first drive mechanism 400 </ b> A, and thus the second drive mechanism 40.
0B to operate the first and second processing rolls 200,
300 is gradually moved upward in accordance with the curve of the groove 5. Further, in order to match the tangent line of the curved groove portion 5 with the axis line of the unprocessed portion of the profile W, the fourth drive mechanism 6 is provided.
00A is operated to gradually tilt the second base plate 500 according to the curve of the groove portion 5.

When the first bending process is completed in this way, the second bending process is performed (FIGS. 3, 4 (a), (b),
See (c). In the second bending process, in the state where the first bending process is completed, the third drive mechanism 500A is operated to move the first base 400 as a whole into the first bending process.
The base rotation shaft 501 is rotated. In FIG. 6, the first substrate rotation shaft 501 is used as an axis for rotation in the upper left direction in the drawing. Even during this second bending process,
Vertical movement of the first and second processing rolls 200, 300 by the second drive mechanism 400B and the fourth drive mechanism 60.
The tilting operation to 0A is performed. For example, in FIG.
In (b) and (c), since the curve of the groove 5 is directed downward, the second drive mechanism 400B is operated in accordance with this curve, and the first and second processing rolls 200, Move 300 gradually upwards. At the same time, the tilting operation is performed by the fourth drive mechanism 600A in order to align the tangent line of the curved groove portion 5 with the axis line of the unprocessed portion of the profile. Thus, in the second bending process, the second drive mechanism 400A to the fourth drive mechanism 60
All drive mechanisms up to 0A will be operated simultaneously.

Next, a groove forming body for forming the groove 5 will be described with reference to FIGS. 7 and 8. This groove forming body is provided with the first and second processing rolls 2 (20
0) and 3 (300) so that the shape of the groove 5 can be changed. In this embodiment, the first and second processing rolls 2 as shown in FIG.
The strip-shaped elongated piece pieces 10a to 10 are attached to the peripheral surfaces of the (200), 3 (300) rotary skeletons 20, 30.
The grooves 5 are formed in the upper and lower intermediate portions by fixing the fixing screws 11a to the upper and lower sides of the 30 circumferential surface. With this configuration, when processing a profile W having different bending shapes [R ₄ and R ₃ in FIG. 9 (c) described above], it suffices to replace only this piece piece 10a. The rotating skeletons 20 and 30 can be used as they are. The shape of the groove portion 5 shown in FIGS. 7A and 7B is a schematic view as an example, and the outer shape, the shape of the groove portion, and the curved state are different depending on the target bending shape.

8 (a), (b) and (c) show another embodiment of the groove portion forming body in which the shape of the groove portion to be formed can be modified to some extent. Is. That is, the shape W to which the bending process is applied may cause a so-called springback in which the bending shape is slightly returned to the original shape after the processing is completed. Therefore, in order to deal with this springback, for example, extra bending may be performed. In this embodiment, however, the shape of the formed groove can be modified.

FIG. 8 (a) shows that the rotating skeletons 20 and 30.
FIG. 7B shows a piece piece 1 as a groove forming body.
It is a partial front view which shows the state which fixed 0b ~ schematically, the same (b) figure is a sectional view on the AA arrow of (a) figure, the same (C) figure is BB of (a) figure. FIG. The piece piece 10 as the groove forming body in this embodiment.
Slots 11c to 11c are formed in b to.
1c-to insert the fixing bolt 11b-, piece piece 1
0b to 0 are fixed to the rotating skeletons 20 and 30. Therefore, when attaching the piece piece 10b, the piece piece 10b can be moved up and down by the length of the long hole 11c, and the vertical movement is sequentially performed for each piece piece 10b. It is possible to easily change the shape of the groove to cope with the back. In this way, the fixed piece pieces 10b to 10b are inserted into the overhanging portions 20a, 20b, 30a, 30b of the upper and lower peripheral portions of the rotating skeletons 20, 30 as shown in the sectional view of FIG. 8C. The stop bolts 12a to 12b prevent the movement thereof.

[0048]

As described above, according to the present invention, the first
By performing the first bending process using the bending mold and the second bending mold, the curves R ₁ and R ₃ shown in FIG. 9 are obtained.
Bending process is performed, and then a second bending process is performed to obtain a curve R ₂
And R ₄ are bent. As a result, three-dimensional bending can be performed as shown in FIG. 9 (a). By such bending, it becomes possible to smoothly perform even bending with a small radius of curvature. Further, since the profile that has been bent once is not processed again, the breakage described in the subject does not occur. Further, in order to make the straight direction of the profile of the unprocessed portion and the tangential direction of the processing groove coincide with each other, the first and second bending dies are tilted while changing their positions in the rotation axis direction. By performing the bending process, since the bending process is performed smoothly without applying an excessive bending force to the shape member during the bending process, it is possible to perform a process with a small bending radius.

Further, by inserting a core into the shape member or performing bending while applying a tensile axial load to one end for fixing the shape member, deformation or breakage of the shape member during bending is prevented. In addition to the above, a method of bending a profile having a small springback can be provided.

Further, the groove portions formed on the first and second processing rolls have a structure in which the groove portion forming body can be exchanged and changed, so that only the groove portion forming body can be changed when the bending shape is changed. Since it can be exchanged, it can be a bending apparatus for a profile that can reduce the manufacturing costs of the first and second processing rolls, and can cope with springback that occurs during bending. It is possible to provide a profile bending device capable of correcting the groove shape.

[Brief description of drawings]

FIG. 1 is a plan view of a profile bending apparatus 1 for carrying out a profile bending method according to the present invention.

FIG. 2 is a diagram illustrating a first bending process.

FIG. 3 is a diagram illustrating a second bending process.

4A, FIG. 4B, and FIG. 4C show movements of the first and second bending rolls 2 and 3 on the axes of the rotation shafts 2a and 3a, and the mounting base 4. FIG. 6 is a diagram showing a tilting motion of the tilting motion of FIG.

FIG. 5 is a front view in which a main part of a bending device 1 for a shape member according to the present invention is cut away.

FIG. 6 is a schematic external view of a bending apparatus 1 for a profile according to the present invention.

FIG. 7 (a) shows first and second processing rolls 2 and 3
FIG. 6B is a perspective view of the first and second processing rolls 2 and 3 in which the piece piece as the groove forming body is attached to the rotating skeleton.

8A is a partial front view schematically showing a state in which the piece pieces 10b to 10 as groove forming bodies are fixed to the rotary skeletons 20 and 30, and FIG. 8B is a view showing FIG. 3A is a cross-sectional view taken along the line AA, and FIG. 6C is a cross-sectional view taken along the line BB of FIG.

FIG. 9 is a diagram illustrating a three-dimensional bending process.

[Explanation of symbols]

 W shape member 1 Bending device for shape member 2 First bending mold (first processing roll) 2a Rotating shaft 2b Tail portion 3 Second bending mold (second processing roll) 3a Rotation Shaft 4 Mounting base 5 Groove 7a, 7b Guide 8 Core 9a, 9b Tension roller 10a, 10b Piece piece 11a Fixing screw 11b Fixing bolt 11c Long hole 12a, 12b Locking bolt 20 Rotating body 30 Rotating body 100 ... Bending device for profile 200, first working roll 201, rotary shaft 300, second working roll 301, rotary shaft 400, first base 400A, first drive mechanism 400B, second Second drive mechanism 500 ··· Second base plate 500A · Third drive mechanism 501 · First base plate rotating shaft 600 · · Third base plate 600A · Fourth drive mechanism

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Jindo Hino 1-34-1, Kambara, Kambara-cho, Anbara-gun, Shizuoka Nippon Technology Center Co., Ltd. (72) Keiichi Sugiyama 3-13, Mita, Minato-ku, Tokyo No. 12 Nippon Light Metal Co., Ltd.

Claims (7)

[Claims] 1. A bending method for three-dimensionally bending a shape in a vertical direction and a horizontal direction with respect to an axis of the shape, wherein a peripheral surface in contact with the shape has a radius corresponding to an intended bending shape. The first and second bending dies having a rotating shaft having a rotating shaft and having groove portions of a shape to be obtained by bending on each circumferential surface, Of the shape member is fixed so that the shape member is movable in the axial direction, and the other end side of the shape member is used as the first bending mold. The step of gripping the tail portion provided and the first and second bending dies are mutually rotated in the direction in which the profile is wound around the first bending die to perform the bending of the profile. A first bending step, fixing the first and second bending dies non-rotatably,
The mounting bases of the first and second bending dies are rotated in the direction in which the profile is wound around the second bending die by the rotation axis of the second bending die. A method of bending a profile, comprising a bending step. 2. The direction of the straight portion of the profile, which is an unmachined portion, and machining of the first bending die or the second bending die during the first bending step and the second bending step. The position and / or the inclination of the rotation axis of the first and second bending dies and the inclination of the rotation axis are relative to the one end side fixed position of the profile so that the tangential direction of the groove at the position coincides. The method for bending a profile as claimed in claim 1, wherein the bending is performed by moving the material to be bent. 3. In the first and second bending steps,
The method of bending a profiled material according to claim 1 or 2, wherein a core is arranged inside the profiled material at a position where it abuts against the first and second bending molds to perform the bending work. 4. The method according to claim 1, wherein a predetermined tensile axial load is applied to a portion of the shape member whose one end is fixed during bending of the shape member. How to bend the profile. 5. A bending device for three-dimensionally bending a shape in a vertical direction and a horizontal direction with respect to an axis of the shape, wherein a radius corresponding to a bending shape to be obtained by the bending is provided on a peripheral surface. In addition, a groove having a bent shape to be obtained by bending is formed on the peripheral surface, and the groove can be rotated by the rotating shaft, and is movable in the axial direction of the rotating shaft according to the shape of the groove. The first and second bending dies for processing the profile at a predetermined processing position, and a mounting base to which the first and second bending dies are integrally attached. The first and second bending molds have one end movably fixed in the axial direction and the other end held by the tail portion of the first bending mold from both sides of the profile and It is placed on the mounting base by sandwiching it so that the groove part fits at the processing position. The first bending process is performed by rotating the respective rotating shafts, and the mounting base is provided with a rotating shaft of a second bending mold subsequent to the first bending process. As a whole, the mounting base is rotated in a direction opposite to the direction of the first bending process to perform the second bending process, and is an unprocessed portion during the first and second bending processes. A bending apparatus for a profile, wherein the direction of the straight portion of the profile and the tangential direction of the groove portions of the first and second bending dies are tilted so as to coincide with each other at the processing position. 6. The first of the first and second bending dies
And the second rotating shaft and the first and second rotating shafts are interlocked with each other to rotate the first and second bending dies for the first bending. A first drive unit for moving the first and second bending dies for performing bending at the predetermined position, and a second moving unit for moving the first and second bending dies on the axes of the first and second rotating shafts. Drive unit, a first base for integrally supporting the first and second bending dies, the first and second rotating shafts, and the first and second drive units. And a rotation shaft that is coaxially connected to the second rotation shaft and supports the first base, and the first base is the second shaft for the second bending process. A third rotating shaft for rotating the third rotating shaft as an axis, a third drive unit for rotating the third rotating shaft, the third rotating shaft, and 3 of a drive unit and a second base for supporting integrally the said profile of the unprocessed portion in which the linear portion of the direction and the first and second
In order to match the tangential direction of the groove of the bending die at the processing position, the second base is formed on the unprocessed portion of the profile at the processing positions of the first and second bending dies. Of the profile member, which comprises a third base body that is pivotally supported on a line orthogonal to the direction of the straight line portion, and a fourth drive unit for tilting the third base body. Bending device. 7. The first and second bending dies each include a rotating skeleton and a groove portion forming body detachably attached to a peripheral surface of the rotating skeleton and exchangeably attached thereto. A bending device for a profile according to claim 5 or claim 6.