JPH1024328A - Bending device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bending device with which the variation in the radius of bend by the movement of a bending jig is reduced. SOLUTION: This device has a positioning jig 6 on which a clearance for passing a base stock fed through is formed, a bending jig 12 on which the clearance for passing a base stock 1 through is formed at the destination of feeding the base stock from the positioning jig 6 is supported to a sliding mechanism 26 which is movable on a plane perpendicular to the base stock feeding direction and the bending jig 12 is moved with a slide driving mechanism 32 for driving the sliding mechanism. A 1st bending mechanism 51 for swinging the bending jig 12 around 1st bending shafts 42, 44 orthogonal to the base stock passing-through direction and the 2nd bending mechanism 55 for rocking the bending jig 12 around the 2nd bending shaft 52 orthoganally crossed with the base stock passing-through direction and the 1st bending shafts 42, 44 are provided and the base stock 1 is bent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus for bending a long material having various cross-sectional shapes such as a pipe, a molding for a window frame of an automobile, and a sash for a window frame.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 1-154824, a positioning jig in which a gap through which a supplied material is inserted is formed and fixed, and a material is supplied to a material supply destination from the positioning jig. There is known a bending apparatus which includes a bending jig having a gap through which the bending jig is inserted, and moves and bends the bending jig in a plane perpendicular to the material supply direction while supplying the material.

[0003]

However, in such a conventional device, as shown in FIGS. 6A and 6B, the bending jig 102 is moved while the material 100 is being supplied so that the bending jig 102 has a predetermined bending radius. Bend. At the beginning of the bending process, when a bent portion of the material 100 is supplied to the bending jig 102, the bending jig 102 is moved to a position corresponding to a bending radius.

[0004] Then, the bending jig 102 is moved to the positioning jig 1.
Returning to the same axis as that of No. 04, the bending process is completed.
As shown in (a), when the bending jig 102 is moving at the start of bending, the bending radius of the material changes from a large bending radius to a small bending radius. As shown in FIG. 6C, when the bending jig is moved to a position corresponding to the bending radius, the movement of the bending jig is stopped, and the bending jig is bent at a constant bending radius.

Thereafter, when the bending jig 102 is moved to return to the original position, the bending radius changes from a small bending radius to a large bending radius. In particular, when attempting to bend with a small bending radius, there is a problem that the change in the bending radius between the start and end of bending becomes significant.

An object of the present invention is to provide a bending apparatus capable of reducing a change in a bending radius caused by movement of a bending jig.

[0007]

The present invention employs the following means in order to solve the above problems. That is, a positioning jig having a gap through which a material to be supplied is inserted is formed, and a bending jig having a gap through which the material is inserted is provided to a material supply destination from the positioning jig. A bending mechanism that moves the bending jig by a slide drive mechanism that drives the slide mechanism by supporting the slide jig in a plane perpendicular to the direction, wherein the bending jig is orthogonal to the material insertion direction. The first that swings around the first bending axis
A bending apparatus comprising: a bending mechanism; and a second bending mechanism that swings the bending jig around a second bending axis orthogonal to the material insertion direction and the first bending axis. is there.

The first bending shaft projects horizontally from the bending jig, and the second bending shaft is attached downward to a support frame that supports the first shaft in a swingable manner. Alternatively, the first bending shaft may project from both sides of the bending jig, and may be rotatably supported by the support frame. Alternatively, the first bending mechanism may include two hydraulic motors respectively driving first bending axes protruding from both sides of the bending jig.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, reference numeral 1 denotes a material. In this embodiment, a molding for an automobile window frame is taken as an example. However, a sash for an automobile window frame may be used, or a pipe may be used. .

A supply mechanism 2 for supplying the material 1 in the axial direction is provided, and a positioning jig 6 having a gap 4 through which the supplied material 1 is inserted is provided on the main body 8. A bending jig 12 having a gap 10 through which the material 1 is inserted is provided at a supply destination of the material 1 having passed through the gap 4 of the positioning jig 6 (see FIG. 3).

A pair of rails 14 and 16 are laid on the main body 8 in a direction orthogonal to the material 1.
The left and right moving tables 18 are engaged with the rails 4 and 16 movably along the rails 14 and 16. A pair of rails 20 and 22 are erected on the left and right moving table 18, and the rail 2
A vertical moving table 24 is movably engaged with 0 and 22 along the rails 20 and 22.

In this embodiment, the slide mechanism 26 is constituted by the rails 14 and 16, the left and right movable base 18, the rails 20 and 22, and the vertical movable base 24.
The vertical moving table 24 is configured to be able to move in a plane perpendicular to the supply direction of the material 1 by the movement of the vertical moving table 24 and the vertical moving table 24.

The left and right moving table 18 is driven to move along rails 14 and 16 by a cylinder 28 provided on the main body 8, and the vertical moving table 24 is moved by a cylinder 30 erected on the left and right moving table 18. It is configured to be driven to move along 20 and 22. In this embodiment, the slide drive mechanism 32 is constituted by the two cylinders 28 and 30.

A swinging member 38 having swinging shafts 34, 36 parallel to the material 1 fixed to both side surfaces is supported by the vertically movable table 24 so as to be swingable through the swinging shafts 34, 36. I have. The swing member 38 is configured to be swingably driven around swing shafts 34 and 36 by a trunnion type cylinder 40 swingably supported by the vertically movable table 24.

On the other hand, on the bending jig 12, first bending shafts 42 and 44 are fixed on both sides thereof in a direction perpendicular to the insertion direction of the blank 1, and the first bending shafts 42 and 44 are respectively "U". It is swingably supported by a “-”-shaped support frame 46.
By supporting the bending jig 12 at both ends by the first bending shafts 42 and 44, durability against a large load is improved.

The first bending shafts 42 and 44 are provided on the support frame 46.
Hydraulic motors 48 and 50 are mounted coaxially with each other, and the rotating shafts (not shown) of both hydraulic motors 48 and 50 and the first bending shafts 42 and 44 are connected. By driving both first bending shafts 42 and 44 by both hydraulic motors 48 and 50, the first bending shafts 42 and 44 can be rocked with a large torque.

In this embodiment, the first bending shafts 42, 4
4. The first bending mechanism 51 is constituted by the hydraulic motors 48 and 50. In the above-described embodiment, the first bending mechanism 51 forms the gap 10 between the bending jigs 12 so that the centers of the first bending shafts 42 and 44 pass near the center of gravity of the material 1.
As shown in (a), the gap 10 of the bending jig 12 may be formed so that the center of the first bending jigs 42 and 44 passes through a position away from the centroid 60 of the material 1.

The direction in which the material 1 is inserted and the first
A second bending axis 52 orthogonal to the bending axes 42 and 44 is attached downward. The second bending shaft 52 is rotatably inserted into the rocking member 38, and the rotation shaft 56 of the hydraulic motor 54 attached to the rocking member 38 is inserted into the second bending shaft 52 and the second bending shaft 52 2 bending axis 52
Is configured to be able to rotate.

In this embodiment, a second bending mechanism 55 is constituted by the support frame 46, the second bending shaft 52, and the hydraulic motor 54. In the above-described embodiment, the second bending mechanism 55
The gap 10 of the bending jig 12 was formed such that the center of the bending axis 52 passed around the center of the material 1 of the material 1, but as shown in FIG. The gap 10 of the bending jig 12 may be formed so as to pass through a position away from the centroid 62.

Next, the operation of the above-described bending apparatus of the present embodiment will be described. First, the material 1 is supplied by the supply mechanism 2.
Is supplied in the axial direction, the raw material 1 passes through the gap 4 of the positioning jig 6 and further passes through the gap 10 of the bending jig 12. The gap 4 between the positioning jig 6 and the gap 10 between the bending jig 12
Are coaxial in the supply direction of the material 1, the material 1 passes through the gaps 4 and 10 without being bent.

Then, as shown in FIG. 4 (a), when bending with a large bending radius, the cylinder 30 is driven while the material 1 is being supplied, and the vertical moving table 38 is raised. As a result, the gap 10 of the bending jig 12 moves upward, and the material 1 is bent with a radius corresponding to the amount of movement. At this time, the hydraulic motors 48 and 50 are driven to
The bending jig 12 may be swung around the bending axes 42 and 44 such that the gap 10 is in the tangential direction of the material 1.

When the bending radius is large, the bending jig 12
Is small, the time required for the bending jig 12 to move to a position corresponding to the bending radius is short, and the supply amount of the material 1 during the movement of the bending jig 12 is small. Accordingly, the moving bending jig 1
Due to 2, the place where the material 1 is bent with a larger bending radius becomes smaller.

Also, when the bending jig 12 is returned to the original position at the end of bending, the bending jig 12 is returned in a short time, so that the portion of the material 1 to be bent with a large radius during that time becomes small. . When the left and right movable table 18 is moved in the left and right direction by driving the cylinder 28, the material 1 is similarly bent in the left and right direction.

On the other hand, as shown in FIG. 4B, when the material 1 is bent with a small bending radius, the hydraulic motor 4
8 and 50 are driven to swing the bending jig 12 around the first bending axes 42 and 44 at an angle corresponding to the bending radius. At this time, it is preferable to drive the cylinder 30 to slightly raise the vertical moving table 24.

The bending jig 12 may be swung at a predetermined angle, and is swung more quickly than the vertical movement of the vertical moving table 24 by the cylinder 30. Therefore, since the supply amount of the raw material 1 supplied during the period is small, the portion of the raw material 1 to be bent with a large bending radius becomes small. Also, when the bending jig 12 is returned to the original angle at the end of bending, the bending jig 12 is quickly returned to the original angle, so that the number of places where the material is bent with a larger radius during that time is reduced. .

The bending jig 12 is connected to the hydraulic motors 48,5
By swinging the blank 1, the blank 1 is forcibly bent, that is, compression bending is performed. Therefore, the swinging of the bending jig 12 by the hydraulic motors 48 and 50 enables the bending of a small radius. .

Furthermore, the hydraulic motor 54 is driven to swing the bending jig 12 around the second bending shaft 52, and the material 1 can be bent in the same manner as described above. By providing the second bending shaft 52 below, the upper side of the bending jig 12 is opened,
Interference between the tip of the bent material 1 and the bending jig 12 can be prevented.

In this embodiment, the swing member 38 can be swung around the swing shafts 34, 36 by driving the cylinder 40,
The bending jig 12 can be moved up and down and right and left by the cylinders 28 and 30 to impart a twist to the material 1. As described above, the present invention is not limited to such embodiments at all, and can be implemented in various modes without departing from the gist of the present invention.

[0029]

As described in detail above, the bending apparatus of the present invention can bend a material by moving a bending jig in a plane perpendicular to the material supply direction, and bends with a relatively large bending radius. Thus, the change in the bending radius due to the movement of the bending jig is small. In addition, the material can be bent by swinging the bending jig around the first bending axis or the second bending axis. By bending with a relatively small bending radius, the bending radius of the bending jig accompanying the movement of the bending jig can be reduced. This has the effect that the change is small.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a bending apparatus as one embodiment of the present invention.

FIG. 2 is a front view of the bending apparatus according to the embodiment.

FIG. 3 is a sectional view of a main part of the bending apparatus according to the embodiment.

FIG. 4 is an explanatory diagram of a bending process by the bending device of the present embodiment.

FIG. 5 is a front view of first and second bending mechanisms as another embodiment.

FIG. 6 is an explanatory diagram of bending by a conventional bending apparatus.

[Explanation of symbols]

 1,100 material 2 supply mechanism 6,104 positioning jig 12,102 bending jig 26 slide mechanism 32 slide drive mechanism 42,44 first bending axis 46 support frame 51 first bending mechanism 52: second bending axis 55: second bending mechanism

Claims (4)

[Claims] A positioning jig having a gap through which a material to be supplied is inserted is formed, and a bending jig having a gap through which the material is inserted is provided to a material supply destination from the positioning jig. In a bending apparatus that is supported by a slide mechanism movable in a plane perpendicular to the material supply direction and moves the bending jig by a slide driving mechanism that drives the slide mechanism, the bending jig is inserted in the material insertion direction. A first bending mechanism for swinging about a first bending axis orthogonal to the first bending axis; and a second bending mechanism for swinging the bending jig about the second bending axis orthogonal to the material insertion direction and the first bending axis. A bending device comprising a mechanism. 2. The first bending shaft projects horizontally from the bending jig, and the second bending shaft is attached downward to a support frame that swingably supports the first shaft. The bending apparatus according to claim 1, wherein the bending is performed. 3. The bending apparatus according to claim 2, wherein the first bending shaft projects from both sides of the bending jig and is rotatably supported by the support frame. 4. The bending apparatus according to claim 3, wherein the first bending mechanism includes two hydraulic motors respectively driving first bending shafts protruding from both sides of the bending jig. .