JPH0811252B2 - Auxiliary bending device - Google Patents

Description

The present invention relates to an auxiliary bending device, and more particularly, to an auxiliary bending device that engages with a bending device to perform bending work.

[Prior Art] A bending device for bending a workpiece, for example, a pipe for a condenser (condenser) of an air conditioner into a constriction is generally known. This processing is performed in the next step as shown in FIG. First, a pipe W, which is a workpiece, is supplied to a right bending jig R of a bending device, and the pipe W is held by a bending die R1 and a fastening die R2 of the right bending jig R. Further, a pressure die R3 for receiving the bending reaction force is also provided (FIG. 4 (A)). Next, when the holding is completed, the bending die R2 is rotated in the arrow F direction around the point r of the bending die R1 together with the tightening die R2, and right bending is performed (FIG. 4 (B)). When the right bending is completed, a predetermined amount of the pipe W is supplied, the right bending jig R is replaced with a left bending jig L, and the pipe W is held by a bending die L1 and a fastening die L2. Also, a pressure type for receiving bending reaction force.
L3 is also installed (Fig. 4 (C)). When holding is finished,
The bending die L1 is rotated in the direction of arrow G around the point 1 of the bending die L1 together with the tightening die L2 to perform left bending (FIG. 4 (D)). The center of rotation l at this time and the center of rotation r for right bending
The position is different from that by the bending diameter. When the left bending is completed, a predetermined amount of pipe W is supplied again, the left bending jig L is replaced with the right bending jig R, and the right bending is repeated (FIG. 4 (E)). The operation described above is repeated, and the pipe W is bent in a crooked manner.

In such an apparatus, conventionally, there has been known an apparatus for arranging a plurality of pipes or the like vertically to perform bending at one time in order to improve processing efficiency. If these plural pipes are clamped and bent by a bending jig having a bending die and a clamping die, the bending die and the clamping die are bent, and it is difficult to bend several pipes simultaneously with high accuracy. there were. Therefore, in order to prevent bending between the bending die and the clamping die, the tips of the bending die and the clamping die are clamped by the clamps provided on the end face of the spindle, and the auxiliary bending that rotates the spindle along with the rotation of the bending jig. The device was known.

[Problems to be Solved by the Invention] However, such conventional auxiliary bending devices have the following problems. That is, (1) in the case where the folding process is performed as in the case of processing the condenser pipe of the air conditioner, since the center of rotation moves to perform the right bending process and the left bending process, the clamp portion is provided. The drive source for rotating the main shaft was also moved at the same time. Therefore, the moving part of the auxiliary bending device becomes large.
It was complicated.

(2) The moving part has a large weight, generates a lot of vibration and noise when moving, and requires a large amount of power.

Therefore, the present invention has been made to solve the above problems, and an object thereof is to provide a small-sized and lightweight auxiliary bending apparatus that performs suitable bending.

Structure of the Invention [Means for Solving Problems] In order to achieve the above object, the present invention has the following structures as means for solving the problems. That is, it has a drive shaft that rotates at the same rotation as the rotation of a bending device that holds a plurality of workpieces by a bending die and a clamping die at the same time and bends the workpieces in a zigzag manner. In an auxiliary bending device for assisting bending of an object, a clamp mechanism for clamping the tips of the bending die and the clamping die of the bending device, and the clamp mechanism provided in a position parallel to the drive shaft are integrally rotatable. And a shaft coupling that is attached to one end of the drive shaft and that transmits the rotation of the drive shaft to the main shaft, rotatably supports the main shaft, and reciprocates the main shaft in a radial direction. And a setting mechanism that is provided between the spindle and the clamp mechanism and that is capable of adjusting the position of the clamp mechanism in the spindle radial direction. When That is the structure of the auxiliary bending device.

Here, the shaft coupling may be any shaft coupling that transmits the rotation of the drive shaft to a main shaft provided in a position parallel to the drive shaft. For example, a disc provided with a protrusion and a groove may be provided. It is also possible to use an Oldham's joint engaged with a circular plate or a universal joint provided with two universal joints so that the space between the universal joints can freely expand and contract.

Further, the moving mechanism may be any mechanism as long as it rotatably supports the main shaft and reciprocates the main shaft in the radial direction, for example, it may be reciprocated by a hydraulic cylinder,
Further, a mechanism in which a ball screw is rotated by a motor to reciprocate may be used.

[Operation] In the auxiliary bending device of the present invention having the above structure, the rotation of the drive shaft is transmitted to the main shaft provided in a position substantially parallel to the drive shaft by the shaft coupling, and the main shaft is reciprocally moved in the radial direction by the moving mechanism. Then, the clamp mechanism that clamps the tips of the bending die and the clamping die of the bending device that processes the workpiece into a zigzag is moved according to the right bending and the left bending of the bending device.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

The auxiliary bending device, which is an embodiment of the present invention, is arranged on the upper part of the bending device for performing the bending process of the pipe.
The figure is a cross-sectional view of this auxiliary bending device, and Fig. 2 is the X- line of Fig. 1.
X sectional drawing, FIG. 3 is a Y arrow view of FIG. As shown in FIGS. 1 and 2, this auxiliary bending device includes a drive shaft 1 for transmitting a driving force, a pair of Oldham couplings 2 connected to one end of the drive shaft 1, and the other end of the Oldham coupling 2. A main shaft 4 connected to and parallel to the drive shaft 1, a moving device 6 for rotatably supporting the main shaft 4 and moving in parallel, a setting device 8 attached to the moving device 6 for setting a bending radius, and a setting device 8. Bending die 10 and tightening die of the bending device 9 attached to the spindle 4 via
It is composed of a clamp device 14 for clamping 12 and the like.

Here, the drive shaft 1 is rotatably supported by the machine body 16, and the drive shaft 1 is rotated by the DC motor 18, and the rotation amount is detected by the encoder 20. The bending main shaft 22 of the bending device 9 is rotated by a DC motor (not shown),
This rotation amount is also detected by an encoder (not shown). The amounts of rotation detected by these two encoders are compared, and the rotations of the drive shaft 1 and the bending main shaft 22 of the bending device 9 are synchronized.

The bending device 9 shown in FIG. 1 is for right bending, and when it is right bent, it is rotated around the rotation center RC. Further, in the case of left bending, the bending device 9 is replaced with a bending device for left bending. At this time, it is rotated around the rotation center LC. The distance between the right bending rotation center RC and the left bending rotation center LC is equal to the bending diameter of the pipe W that is the workpiece. In addition, each rotation center RC, L
C is symmetrical with respect to the center of the pipe W. Furthermore,
In this auxiliary bending device, the machine center MC and the center of the pipe W are set at substantially the same position.

The Oldham coupling 2 is a shaft coupling that transmits rotation to the main shaft 4 that is located parallel to the drive shaft 1 and is centered off. The Oldham coupling 2 has a structure in which a disk provided with a groove and a disk provided with a projection are stacked. As a result, even if the main shaft 4 is translated by the moving device 6, the rotation of the drive shaft 1 is reliably transmitted to the main shaft 4.

Further, the moving device 6 includes a moving base 24 for rotatably supporting the main shaft 4 by a bearing, a pair of guide plates 26 mounted on the outer wall of the moving base 24 and having a groove, and a groove of the guide plate 26 mounted on the main body 16. A pair of guide rails 28 that engage with the moving table 24 to guide the movement of the moving table 24, two hydraulic cylinders 30a and 30b attached to the main body 16 to reciprocate the moving table 24, and the moving table 24 that abuts the moving table 24. It is composed of three types of stoppers 32a, 32b, 32c having different lengths for restricting the movement amount of, and a rotating plate 34 and the like to which the stoppers 32a, 32b, 32c are attached and are rotatably supported by the main body 16. This moving device 6 uses a cylinder 30a to move the moving table 2
4 is moved in the direction of arrow a to bring the center of the spindle 4 to the position of the left bending rotation center LC, and the cylinder 30b is used to move the moving table 24 in the direction of arrow b to move the center of the spindle 4 to the right bending rotation center RC.
Position. Moreover, three types of stoppers 32a, 32b, 32c
Since the rotation plate 34 is rotated and a predetermined stopper is brought into contact with the moving base 24, three kinds of movement amounts (distances between the left rotation center LC and the right rotation center RC) can be obtained. . The length of the stoppers 32a, 32b, 32c is the same as that of the movable table 2
The movement amount of 4 is set to be symmetrical with respect to the machine center MC.

The setting device 8 is mounted on the end surface of the spindle 4 and has a dovetail groove formed in the same direction as the moving direction of the moving table 24.
6, a setting table 38 that slides in the dovetail groove of the housing 36, an adjusting screw 40 that is screwed to the setting table 38 and rotatably supported by the housing 36, and a micrometer head attached to one end of the adjusting screw 40. It is composed of 42 mag. The setting device 8 can reciprocate the setting table 38 by rotating the adjusting screw 40, and sets the moving amount of the moving table 24 to half. As a result, the clamp device 14 is rotated about the center of rotation RC, L
The bend radius can be set from C to the micrometer head for various pipes W with different bend radii.
By setting 42, the optimum bending radius can be set. Moreover, since the micrometer head 42 is attached to the adjusting screw 40, the movement amount of the setting table 38 is set to the minimum unit of 0.
It can be set at 02mm.

The clamp device 14 includes two hydraulic cylinders 44a and 44b mounted face-to-face on the setting table 38, and a "C" -shaped projection 46a slidably mounted on the setting table 38 (see FIG. 3). Sliding block 46 provided with, projection 46a of sliding block 46
And a pair of clampers 48a, 48b slidably supported by the setting table 38 and provided between the pair of clampers 48a, 48b and having a core metal 50 having the same thickness as the pipe W. ing.
As shown in FIG. 3, in this clamp device 14, when the hydraulic cylinder 44a is driven, the sliding block 46 is slid in the direction of arrow C, and accordingly, a pair of projections 46a of the sliding block 46 are engaged. The clampers 48a and 48b move toward the center, and the first
The bending die 10 and the clamping die 12 shown in the drawing are arranged in a row 3 with the core metal 50 interposed therebetween.
Clamp the pipe W of the book. Also, the hydraulic cylinder 44b
Is driven, the sliding block 46 moves to the arrow d (see FIG. 3).
The clampers 48a and 48b are slid in the direction away from the center, whereby the clamps are opened.

As described above, according to the auxiliary bending apparatus of this embodiment, the rotation of the drive shaft 1 is transmitted to the main shaft 4 in a position parallel to the drive shaft 1 by the Oldham coupling 2, and the clamp device 14 attached to the main shaft 4 is used. The bending die 10 and the clamping die 12 can be clamped and rotated. Further, the main shaft 4 is reciprocally moved by the moving device 6, and the bending direction can be changed by left bending and right bending, so that suitable bending can be performed even if the rotation center changes. Thus, since the main shaft 4 is rotated without moving the drive shaft 1 connected to the DC motor 18, the weight of the moving part reciprocated by the moving device 6 is small and the size is small. Furthermore, since the weight of the moving portion is light, the movement of the moving device 6 causes less vibration of the moving table 24 and noise accompanying it, and the moving unit 24 can be moved with small power.

The auxiliary bending device includes a setting device 8 and stoppers 32a, 32b,
32c is provided, and various bending radii of the pipe W can be easily dealt with by setting each.

Although the embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and it goes without saying that the present invention can be implemented in various modes without departing from the scope of the present invention.

As described in detail above, according to the auxiliary bending apparatus of the present invention,
The rotation of the drive shaft is transmitted to the main shaft in a position parallel to the drive shaft by the shaft joint, and the tip of the bending die and the tightening die of the bending device is clamped by the clamp mechanism attached to the main shaft, and a plurality of tips are bent during bending. It is prevented that the bending die and the clamping die, which hold the work piece at the same time, are opened and the processing accuracy is lowered. Also,
The reciprocating amount of the spindle can be adjusted by the moving mechanism, and the position of the clamp mechanism in the radial direction of the spindle can be adjusted by the setting mechanism. Processing can be performed. Since the main shaft is rotated without moving the drive shaft in this manner, the weight of the moving portion is light and the size can be reduced. Further, since the weight of the moving unit is light, vibration of the moving mechanism and noise accompanying it are less likely to occur during movement, and it is possible to move with a small amount of power.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an auxiliary bending device which is an embodiment of the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 is a Y arrow of FIG. A perspective view and FIG. 4 are processing explanatory views for processing into a kudzu folding. 1 ... Drive shaft, 2 ... Oldham coupling 4 ... Main shaft, 6 ... Moving device 8 ... Setting device, 14 ... Clamping device

Claims (1)

[Claims] 1. A bending shaft for rotating a plurality of workpieces at the same rotation as that of a bending device for simultaneously clamping and bending a plurality of workpieces by a bending die and a clamping die, the bending device comprising: In the auxiliary bending device for assisting the bending of the workpiece, a clamping mechanism for clamping the tips of the bending die and the clamping die of the bending device, and the clamping mechanism provided at a position parallel to the drive shaft are provided. A main shaft that is integrally rotatably attached, a shaft coupling that is attached to one end of the drive shaft, and that transmits the rotation of the drive shaft to the main shaft, rotatably supports the main shaft, and radially rotates the main shaft. And a setting mechanism that is provided between the spindle and the clamp mechanism and that is capable of adjusting the position of the clamp mechanism in the spindle radial direction. That Auxiliary bending apparatus and symptoms.