JPH03184632A - Axial line bending method for work and its device - Google Patents

Abstract

PURPOSE:To reduce the frictional resistance and to prevent the damaging of work or the abrasion of supporting device by feeding the long size work, inserting it through the supporting device, holding with the bending device and applying the vibration to the contacting part of the work and supporting device in the state of shifting the bending device. CONSTITUTION:The long size work 2 is fed in the axial direction with the driving device 11, this work 2 is inserted into the inserting hole of the supporting device 3, and held with the bending device 5. And in the state of shifting the bending device 5 against the axial line, the contact part of the supporting device 3 and the work is subjected to vibration with the vibration applying device 13 and the work 2 is bent. In this time, the frictional resistance on the sliding surface of the supporting device 3 is reduced and the inserting through of the work is easily executed. The vibration is applied in the sliding direction in order to promote the relative reciprocating motion on the sliding surface. Further, if the ultra-sonic vibration is applied, the reduction of the sliding resistance becomes remarkable.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for axially bending a long workpiece.

[Conventional technology]

FIG. 6 is a front view of the vehicle door sash. In the figure, ↓ is a bent product (sash), which is manufactured by bending a long workpiece with a U-shaped cross section along its axis.

Figure 7 shows, for example, JP-A-62-158530, JP-A-6
2-179818 and Japanese Patent Laid-Open No. 1-154824; FIG. The method for manufacturing the bent product 1 involves continuously feeding a long workpiece 2 having an irregular cross section, inserting it into an insertion hole 4 formed in a support device 3 and having a cross section similar to that of the workpiece 2, and then bending the workpiece 1. It is inserted between the vertical bending roller 6 and the horizontal bending roller 7 of the device 5, and the bending device 5 is swung in the X (horizontal) direction, the Y (vertical) direction, or rotated in the R direction to offset the bending device 5 with respect to the axis. By positioning it in the same position, axial bending is performed using the exit of the insertion hole 4 as a fulcrum.

However, in such conventional workpiece axial bending methods and devices, in order to make the bending dimensions accurate, the insertion hole 4 should be as close to the cross-sectional shape of the workpiece 2 as possible;
The more the approximation is made, the more the sliding resistance increases and the workpiece 2
This makes it difficult for the workpiece 2 to pass through, requiring a large force to feed the workpiece 2, damaging the inner and outer surfaces of the workpiece 2, and wearing out the sliding surface of the support device 3, shortening its life. There is a problem in that the workpiece 2 is easily deformed, and this is particularly noticeable in areas where the bending radius is small, as shown at 8.9 in FIG.

[Problem to be solved by the invention]

An object of the present invention is to solve the above problems by making the insertion hole of the workpiece close to the cross-sectional shape of the workpiece.

Even if the bending dimensions are made accurate, sliding resistance does not increase, and the workpiece can be inserted easily with a small amount of power.It also prevents damage to the workpiece and wear of the sliding surface of the support device, and extends the life of the support device. The object of the present invention is to propose a method and device for bending the axis of a workpiece, which can lengthen the workpiece and prevent deformation of the workpiece.

[Means to solve the problem]

The present invention is the following workpiece axial bending method and apparatus.

(1) A long workpiece is sent out in the axial direction, inserted into an insertion hole formed in a support device, the workpiece that has passed through the insertion hole is held by a bending device, and the bending device is deviated from the axis. A method for axially bending a workpiece, the method comprising applying vibration to a contact portion between the workpiece and a support device.

(2) The method described in (1) above, in which vibration is applied to the workpiece.

(3) The above (1) in which vibration is added to the support device
Method described.

(4) The vibration is ultrasonic vibration (1) or 3) above.
The method described in any of the above.

(5) A drive device that sends out a long workpiece in the axial direction, a support device that has an insertion hole with a cross-sectional shape similar to the workpiece, and a support device that holds the workpiece that has exited the insertion hole and deviates with respect to the axis. 1. A workpiece axial bending device comprising: a bending device capable of bending a workpiece; and a vibration adding device attached to the workpiece or the support device so as to apply vibration to a contact portion between the workpiece and the support device.

(6) The device according to (5) above, wherein the vibration applying device is an ultrasonic oscillator.

[For production]

In the workpiece axial bending method and device of the present invention,
A long workpiece is sent out in the axial direction by the drive device, the workpiece is inserted into the insertion hole of the support device, and is further held by the bending device, with the bending device being deviated from the axis.
The vibration applying device applies vibration to the contact area between the work and the support device to bend the work.

At this time, by adding vibration to the contact area between the workpiece and the support device, the frictional resistance on the sliding surface is reduced, and even if the cross-sectional shape of the insertion hole is close to that of the workpiece, the workpiece can be inserted easily. damage to the support device and wear on the support device are prevented. By applying vibration to either or both of the workpiece and the support device, the vibration can be applied to the contact portion between the two through propagation. The direction of vibration is preferably applied in the sliding direction so as to encourage relative reciprocating motion in the contact portion.

When ultrasonic vibrations are added as vibrations, the sliding resistance decreases significantly. Frequency: 10-20KHz, amplitude: 1mm
The following ultrasonic waves are preferred.

〔Example〕

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

FIG. 1 is a front view showing the @ wire bending device of the embodiment.

2 is a sectional view of the support device, FIG. 3 is a sectional view taken along line AA in FIG. 1, FIG. 4 is a view taken in the direction of arrow B, and FIGS.
The same reference numerals as in the figures indicate the same or corresponding parts.

Reference numeral 11 denotes a drive device such as a chain conveyor for continuously sending out the workpiece 2, and includes a coupling device 12, a vibration adding device [13
and is connected to the workpiece 2 via a mounting plate 14. The vibration applying device 13 includes an ultrasonic oscillator 15 and a horn 16, and is configured to apply ultrasonic vibration to the workpiece 2 in the direction of movement of the workpiece 2 via the mounting plate 14.

In the support device 3, a male holder 17 and a female holder 18 that form the insertion hole 4 are joined by a pin 19 and housed in a main body 20, and a vibration applying device 21 is connected to the male holder 17. The vibration applying device 22 is composed of an ultrasonic oscillator 15 and a horn 16, and is adapted to apply ultrasonic vibrations to the support device 3 in the direction of movement of the workpiece 2.

Bending device! 15 has almost the same structure as the conventional one, and has vertical bending rollers 6 that hold the workpiece 2 from above and below, and horizontal bending rollers 7 that hold the workpiece 2 from the left and right sides.
Although it is designed to be deviated from the axis by swinging in the direction and rotation in the R direction, detailed illustration is omitted.

In the method of axial bending of a workpiece using the workpiece axial bending apparatus configured as described above, first, the workpiece 2 is sent out in the axial direction by the drive device 11 and inserted into the insertion hole 4 of the support device 3. Then, the workpiece 2 coming out of the insertion hole 4 is held between the vertical bending roller 6 and the horizontal bending roller 7 of the bending device 5,
X bending device t5.

Swing in the Y direction or rotate in the R direction.

Vibration adding device 13.2 in a state of deviation with respect to the axis
By applying ultrasonic vibration to the workpiece 2 or the support device 3 by the method 1, the workpiece 2 and the support device 3 are
The workpiece 2 is bent by applying vibration to the contact portion of the workpiece 2.

By applying vibration to the contact area between the workpiece 2 and the support device 13 in this way, the frictional resistance on the sliding surface is reduced, and even if the cross-sectional shape of the insertion hole 4 approaches that of the workpiece 2, the workpiece 2 cannot be inserted. Therefore, damage to the workpiece 2 and wear of the support device 13 are prevented.

The vibration may be applied by either one or both of the vibration adding devices [13, 21], but if the bending radius is large, it is preferable to use either one, and if the bending radius is small, it is preferable to use both.

In this case, if the bending radius is equal to or greater than a certain value, the application of both vibrations can be stopped.

The deflection of the bending device 5, that is, the moving direction, moving amount, moving speed, etc., can be controlled by a control device by detecting the amount of delivery of the workpiece 2 and according to a preset program.

The vibration applying devices 13 and 21 can be started and stopped in the same manner, but the sliding resistance may be detected based on power consumption, etc., and controlled accordingly.

FIG. 5 is a front view of a support device according to another embodiment. In this embodiment, two vibration adding devices 21 are provided facing each other, and are in contact with the male holder 17 and the female holder 18 through L-shaped propagation paths 22, respectively, and apply vibration in the direction of movement of the workpiece 2 from the lateral direction. It is supposed to be done.

In the above description, the position where the vibration is directly applied is not limited to the position shown in the drawings, but may be applied at any position so that the vibration is ultimately propagated to the contact portion between the workpiece 2 and the support device 3. In addition, the shapes of the bent product 1 and the workpiece 2 are not limited to those shown in the drawings, but include various rails, guide rails, moldings,
The present invention can be applied to objects of any shape such as pipes and rods, and the supporting device 3 and bending device 5 can be selected depending on each type, and the number and mounting position of the vibration applying devices can be selected.

〔Effect of the invention〕

According to the present invention, since the bending process is performed by applying vibration to the contact portion between the workpiece and the support device, the insertion hole of the workpiece can be made close to the cross-sectional shape of the workpiece, and the bending dimension can be made accurate. , it is possible to easily insert the workpiece with a small amount of power without increasing sliding resistance, and it also prevents damage to the workpiece and wear of the sliding surface of the support device, prolonging the life of the support device, and improving the life of the workpiece. Deformation can be prevented and the axis of the workpiece can be bent efficiently.

[Brief explanation of drawings]

Fig. 1 is a front view showing the axial bending device of the embodiment, Fig. 2 is a sectional view of the support device, Fig. 3 is a sectional view taken along line A-A in Fig. FIG. 5 is a front view of a support device according to another embodiment, FIG. 6 is a front view of a bent product, and FIG. 7 is a perspective view of a conventional axial bending device. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is a bent product, 2 is a workpiece, 3 is a support device, 4 is an insertion hole, and 5
11 is a bending device, 11 is a drive device, 13.21 is a vibration adding device, 15 is an ultrasonic oscillator, and 16 is a horn.

Claims (6)

[Claims] (1) A long workpiece is sent out in the axial direction, inserted into an insertion hole formed in a support device, the workpiece that has passed through the insertion hole is held by a bending device, and the bending device is deviated from the axis. A method for axially bending a workpiece, the method comprising applying vibration to a contact portion between the workpiece and a support device. (2) Claim (1) in which vibration is added to the workpiece.
Method described. (3) Claim (1) in which vibration is added to the support device.
) method described. (4) Claims (1) to (3) wherein the vibration is an ultrasonic vibration.
). (5) A drive device that sends out a long workpiece in the axial direction, a support device that has an insertion hole with a cross-sectional shape similar to the workpiece, and a support device that holds the workpiece that has exited the insertion hole and deviates with respect to the axis. 1. A workpiece axial bending device comprising: a bending device capable of bending a workpiece; and a vibration adding device attached to the workpiece or the support device so as to apply vibration to a contact portion between the workpiece and the support device. (6) Claim (5) wherein the vibration applying device is an ultrasonic oscillator.
The device described.