JP4592843B2 - Bending device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bending apparatus for bending a long material.
[0002]
[Prior art]
Conventionally, as a method of bending a long material in both left and right directions, as disclosed in Japanese Patent Laid-Open No. 62-267024, a right bending treatment comprising a pressure die, a bending die, and a clamping die according to a right bending shape. There is known a tool including a tool and a left bending jig including a pressure die, a bending die, and a clamping die corresponding to the left bending shape.
[0003]
When bending to the right, move the right bending jig to a position corresponding to the center of the right bending process to perform right bending, and to perform left bending, turn the left bending jig to the left. It was moved to a position corresponding to the processing center and bent in both the left and right directions.
[0004]
[Problems to be solved by the invention]
However, in such a conventional device, the right bending jig and the left bending jig are moved to positions corresponding to the respective bending centers in accordance with the bending direction. Therefore, the large and heavy left and right bending jigs, each consisting of a bending die and a clamping die, have to be moved as they are, and there is a problem that the apparatus becomes complicated and large.
[0005]
An object of the present invention is to provide a bending apparatus capable of bending a long material in the left-right direction with a simple configuration.
[0006]
[Means for Solving the Problems]
In order to achieve this problem, the present invention has taken the following measures in order to solve the problem. That is,
In a bending device that has a pair of left and right bending dies according to the left and right bending direction of the long material, and revolves the clamping die around the left and right bending dies to bend the long material in the left and right direction,
There is one clamping mold, and
A switching mechanism that selectively moves one of the left and right bending dies to a bending position according to a left and right bending direction;
A clamping mold drive mechanism that revolves one clamping mold around one of the left and right bending molds that is rotated to the bending position by rotating a bending shaft;
The bending apparatus includes a feeding mechanism that moves the clamping mold driving mechanism in accordance with a left-right bending direction and aligns the bending axis with a left-right bending position .
[0007]
The switching mechanism includes a swinging member supported so as to be swingable about a swinging shaft, the left and right bending molds are disposed on the swinging member with the material interposed therebetween, and the swinging member A configuration may be adopted in which one of the left and right bending dies is selectively moved to a bending position in accordance with the bending direction. Further, the swing shaft may be configured to be orthogonal to the longitudinal center of the material.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Reference numeral 1 denotes an elongated material, which is a thin pipe having an outer diameter of about 6 mm in this embodiment. The material 1 is gripped at its rear end by a chuck (not shown), and the chuck is mounted on a carriage (not shown) that moves in the longitudinal direction of the material 1.
[0009]
The material 1 is fed in the longitudinal direction by the movement of the carriage, and a pair of left and right bending dies 2 and 3 and a clamping die 4 are provided at the destination of the material 1. The pair of left and right bending dies 2 and 3 are formed in a substantially semi-cylindrical shape, and grooves 2a and 3a are formed on the outer periphery, respectively.
[0010]
The left and right bending dies 2 and 3 are disposed at both ends of the “<”-shaped swing member 8, and the swing member 8 can swing around a swing shaft 12 supported by the mounting member 10. It is supported. The swing shaft 12 is arranged such that its axial direction is orthogonal to the center in the longitudinal direction of the material 1, and left and right bending dies 2 and 3 are arranged on both sides of the material 1. The attachment member 10 is attached to the support base 14.
[0011]
By winding the material 1 around the groove 2a of the left bending die 2, the material 1 is bent leftward according to the shape of the left bending die 2, and by winding the material 1 around the groove 3a of the right bending die 3, the material 1 1 is configured to be bent in the right direction according to the shape of the right bending die 3.
[0012]
On the other hand, a long hole 22 is formed in the swing member 8, and a pin 24 is slidably inserted into the long hole 22. The pin 24 is erected on a slide base 26, and the slide base 26 is slidably supported by a pair of guide rods 28 and 30 that are orthogonal to the longitudinal direction of the material 1 and also orthogonal to the swing shaft 12. ing. The slide base 26 is moved along the guide bars 28 and 30 by an actuator (not shown). In this embodiment, the swing member 8, the swing shaft 12, the pin 24, the slide base 26, the guide bars 28 and 30, A switching mechanism 32 is configured by the actuator.
[0013]
The switching mechanism 32 oscillates the oscillating member 8, and as shown in FIG. 1, the right bending position where the material 1 is inserted into the groove 3a of the right bending mold 3, and the left bending as shown in FIG. It can be switched to the left bending position where the material 1 is inserted into the groove 2a of the mold 2.
[0014]
The clamping die 4 includes a roller 34 having a groove corresponding to the material 1 on the outer periphery and a holder 36 that rotatably supports the roller 34, and the clamping die 4 is attached to a clamp base 38. Grooves 40 and 42 are formed on the side surface of the clamp base 38, and the grooves 40 and 42 are formed by bending into a "<" shape composed of inclined portions 40a and 42a and linear portions 40b and 42b. .
[0015]
Pins 44 and 46 are slidably inserted into the grooves 40 and 42, respectively, and the pins 44 and 46 are erected on the bending arm 48. The clamp base 38 is connected to a rod 52 of a cylinder 50 that is swingably supported by the bending arm 48. When the cylinder 50 is driven, the grooves 40 and 42 of the clamp base 38 are moved along the pins 44 and 46. It is configured to slide and move horizontally after the clamp base 38 moves obliquely upward.
[0016]
The bending arm 48 is rotatably supported on the mounting base 56 via a bending shaft 54, and the bending shaft 54 is arranged orthogonal to the longitudinal direction of the material 1 and parallel to the swing shaft 12. A pulley 54a is attached to the bending shaft 54, and the bending shaft 54 is rotated by an actuator 55 via a belt (not shown). In the present embodiment, the clamp drive mechanism 57 is configured by the clamp base 38, the pins 44 and 46, the bending arm 48, the cylinder 50, the bending shaft 54, the pulley 54a, the actuator 55, and the mounting base 56.
[0017]
The mounting base 56 is configured to be movable along a pair of rails 60 and 62 attached to the apparatus main body 58 so as to be orthogonal to the longitudinal direction of the material 1 and also orthogonal to the bending axis 54. Then, an actuator (not shown) is driven, and the mounting base 56 is moved to the right bending position where the center of the bending shaft 54 coincides with the center CR of the right bending mold 3 as shown in FIGS. The center can be selectively moved to the left bending position that coincides with the center CL of the left bending die 2. In the present embodiment, the feed mechanism 64 is configured by the mounting base 56, the rails 60 and 62, and the actuator.
[0018]
Next, the operation of the bending apparatus of this embodiment described above will be described.
First, the rear end of the material 1 is gripped by a chuck, and the front end side of the material 1 is supplied to the left and right bending dies 2 and 3. As shown in FIG. 1, when bending in the bending direction corresponding to the right bending die 3, the material 1 is inserted into the groove 3 a of the right bending die 3. When the cylinder 50 is driven, the clamp table 38 is moved.
[0019]
In the clamp table 38, the inclined portions 40a, 42a of the grooves 40, 42 slide along the pins 44, 46, and the clamp table 38 moves obliquely upward. When the pins 44 and 46 reach the straight portions 40 b and 42 b of the grooves 40 and 42, the clamp table 38 is moved horizontally, and the material 1 is sandwiched between the right bending die 3 and the roller 34 of the clamping die 4.
[0020]
Next, the actuator 55 is driven to rotate the bending shaft 54. At that time, the clamping mechanism 4 is moved by the feed mechanism 64 to the right bending position where the bending shaft 54 and the center CR of the right bending mold 3 coincide. As a result, the bending arm 48 rotates around the bending shaft 54, and the clamping die 4 revolves around the right bending die 3 together with the bending arm 48. Therefore, the material 1 is bent in the right direction so that the material 1 is wound around the groove 3 a of the right bending die 3.
[0021]
The bending angle of the material 1 is determined according to the swinging angle of the bending arm 48, and the swinging angle of the bending arm 48 is preferably made larger than the bending angle in consideration of the springback. After the end of the bending process, the cylinder 50 is driven to move the clamp base 38 and the clamping die 4 is separated from the material 1, contrary to the above.
[0022]
Subsequently, when bending to the left, the material 1 is supplied in the longitudinal direction by moving a carriage (not shown). Then, the actuator of the switching mechanism 32 is driven, and the swing member 8 is swung around the swing shaft 12 by the pin 24. As a result, the right bending die 3 is separated from the material 1, the left bending die 2 is moved to the left bending position, and the material 1 is inserted into the groove 2 a of the left bending die 2.
[0023]
Next, the actuator of the feed mechanism 64 is driven to move the mounting base 56, and the clamping die 4 is moved to the left bending position where the bending shaft 54 coincides with the center CL of the left bending die 2 as shown in FIG. Moving. Then, the cylinder 50 is driven to move the clamp base 38, and the material 1 is sandwiched between the left bending die 2 and the clamping die 4. The actuator 55 is driven to swing the bending arm 48 around the bending shaft 54 so that the clamping die 4 revolves around the left bending die 2. Therefore, the material 1 is bent in the left direction so that the material 1 is wound around the groove 2 a of the left bending die 2.
[0024]
As described above, in the bending apparatus of this embodiment, when bending in the left-right direction, the pair of left and right bending dies 2, 3 are selectively moved to switch the bending direction. Since one clamping die 4 is moved in accordance with the left and right bending directions, the configuration of the apparatus is simplified and the apparatus is reduced in weight.
[0025]
Further, by arranging the left and right bending dies 2 and 3 on the swinging member 8 and switching the left and right bending directions by swinging the swinging member 8, interference with the clamping die 4 can be easily avoided.
The present invention is not limited to such embodiments as described above, and can be implemented in various modes without departing from the gist of the present invention.
[0026]
【The invention's effect】
As described in detail above, the bending apparatus of the present invention selectively moves the pair of left and right bending dies to switch the left and right bending directions, and separately, according to the left and right bending directions by the feed mechanism. Since it moves, the configuration of the apparatus is simplified and the apparatus is lightened.
[0027]
Further, by arranging a left and right bending mold on the swing member and switching the left and right bending directions by swinging the swing member, it is possible to easily avoid interference with the clamping mold.
[Brief description of the drawings]
FIG. 1 is a plan view of a bending apparatus according to an embodiment of the present invention.
FIG. 2 is a front view showing a part of the bending apparatus of the present embodiment in cross section.
FIG. 3 is a side view showing a part of the bending apparatus of the present embodiment in cross section.
FIG. 4 is an explanatory view showing a state in which the left bend die of the present embodiment is in a left bend position.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Material 2 ... Left bending type | mold 2a, 3a ... Groove 3 ... Right bending type | mold 4 ... Fastening type | mold 8 ... Oscillating member 12 ... Oscillating shaft 22 ... Elongate hole 24 ... Pin 26 ... Slide base 32 ... Switching mechanism 34 ... Roller 38 ... Clamp base 48 ... Bending arm 50 ... Cylinder 54 ... Bending shaft 57 ... Clamping drive mechanism 64 ... Feeding mechanism

Claims (3)

In a bending device that has a pair of left and right bending dies according to the left and right bending direction of the long material, and revolves the clamping die around the left and right bending dies to bend the long material in the left and right direction,
There is one clamping mold, and
A switching mechanism that selectively moves one of the left and right bending dies to a bending position according to a left and right bending direction;
A clamping mold drive mechanism that revolves one clamping mold around one of the left and right bending molds that is rotated to the bending position by rotating a bending shaft;
A bending apparatus comprising: a feed mechanism that moves the clamping mold driving mechanism in accordance with a left-right bending direction to align the bending axis with a left-right bending position .   The switching mechanism includes a swinging member supported so as to be swingable about a swinging shaft, the left and right bending molds are disposed on the swinging member, and the swinging member is swung. 2. The bending apparatus according to claim 1, wherein the bending device selectively moves one of the left and right bending dies to a bending position according to a bending direction.   The bending apparatus according to claim 2, wherein the swing shaft is orthogonal to a longitudinal center of the material.

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