JPH10314849A - Bending and twisting device of long size work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely execute bending without receiving the influence of twisting in case of treating bending and twisting on a long size work. SOLUTION: This device has a work feeder 10 to feed a long size work 2 of non-circular cross-section linearly and a work introducing hole 27 to pass the carried long size work 2. Further, it has a 1st die 28 to change the attaching angle around the feeding axis of the work feeder 10 and a work introducing hole 38 to pass the long size work carried from this die 28, and it is composed of a 2nd die 39 to bend the long size work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the bending and bending of long workpieces.
The present invention relates to a twisting device.

[0002]

2. Description of the Related Art FIG. 5 is a principle diagram of a conventional long work bending / twisting apparatus 100. In the conventional long work bending / twisting apparatus 100, a long work (hereinafter referred to as "work") is used.
It is written. ) 101 by work feeder 102
In the direction, the fixed mold 103 guides the movable mold 10
In step 4, the bending and twisting is performed, that is, the movable die 104 is moved in the X-axis and Y-axis directions, and is bent by tilting the movable die 104 around each axis, and twisting is performed by rotating the movable die 104 around the Z-axis.

[0003]

However, the movable mold 104
When bending and twisting around the Z axis are performed, bending stress is generated due to the torsion, and there is a problem that bending cannot be performed with high accuracy.
This will be described below with reference to the drawings.

FIGS. 6 (a), 6 (b) and 6 (c) are views showing the operation of a conventional bending / twisting apparatus for a long work, where FIG. 6 (a) is a perspective view of a main part and FIG. Is a bending diagram in which is replaced by a cantilever beam, and (c) is a bending moment diagram. In (a), the work 101 is guided by the fixed mold 103,
The movable mold 104 bends upward and applies a torsional torque T.

In FIG. 1B, the center axis of the workpiece 101 is set as a neutral axis of the beam.
Is defined as a point A, and the point of action of the movable mold 104 shown in FIG. An arbitrary distance z is set from the point P in the direction of the fixed die 103, and the point is set as a point Q. When the load W acts on the point P upward, a bending moment M = Wz acts on the point Q. Assuming that the distance between the point P and the point A is L, the maximum bending moment M0 = WL acts on the point A.
Due to the bending moment M, the neutral axis comes into contact with the Z axis at the point A, and the deflection from the point A toward the point P in the direction perpendicular to the Z axis increases, and the neutral axis bends in a quadratic curve.

Assuming that the tangent to the point P is the K axis and the distance between the K axis and an arbitrary point Q is u, the torsional torque T given at the point P acts around the K axis. However, at an arbitrary point Q other than the point P, the torsional torque T is determined not by the torsional torque T but by the bending moment Tm due to the distance u.
Act as

In FIG. 1C, a bending moment M generated in the Y direction at an arbitrary point Q and the bending moment M
And the bending moment Tm generated in the direction perpendicular to the X direction, that is, in the X direction, is R, the bending moment Tm due to torsion causes the resultant bending moment R to be shifted from the bending moment M by an angle θ. Similarly, the maximum combined bending moment R0 generated at the point A is generated in a direction shifted by an angle θ0 from the maximum bending moment M0. In bending, the work bends in the direction of the maximum combined bending moment R0, so that the work 101 bends in a direction deviated by at least the angle θ0 from the given bending direction.
Therefore, there is a problem that if the bending and the twisting are performed by one movable mold 104, the bending cannot be performed with high accuracy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a technique capable of accurately performing a bending process when performing a bending process and a twisting process on a long work.

[0009]

In order to achieve the above object, a first aspect of the present invention is to provide a work feeder for linearly feeding a long work having a non-circular cross section, and a work for passing the sent long work. A first mold having a conduction hole and capable of changing an attachment angle around a supply axis of the work feeder, and a work conduction hole for passing a long work sent from the mold; The bending and torsion processing device for a long work was constituted from the second die for bending the workpiece.

When performing bending and torsion on a long workpiece, the first die performs torsion around the supply axis of the work feeder, so that the bending can be performed accurately without being affected by the torsion. Can be. In addition, since the first mold is provided with the twisting mechanism, the second mold can have a simple configuration.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is an exploded perspective view of an apparatus for bending and twisting a long workpiece according to the present invention. The apparatus 1 for bending and twisting a long workpiece includes a work feeder 10 and a first mold part 2.
0, the second mold part 30, and the core feeding part 50, and each structure will be described in detail below.

The work feeder 10 includes a driving servomotor 11, a driving pulley 12, a timing belt 13, and a driven pulley 1 attached to the shaft end of the servomotor 11.
4, a ball screw shaft 15 rotated by the driven pulley 14, and a ball screw shaft 15
The slider 16 comprises a slider 16 which moves linearly in the Z direction by rotation of the slider 16 and a pusher 17 placed on the slider 16. In addition, the work feeder 10 applies the presser 17 to the rear end of the long work 2 shown by a two-dot chain line, and the work feeder 10 is elongated in accordance with the progress of the processing of the first mold part 20 and the second mold part 30. Is linearly fed out along the Z-axis.

[0013] The first mold part 20 includes support stands 21, 22 and 2.
3 and rollers 24,.
(... denotes a plurality). A substantially semi-cylindrical rotating body 25 rotatably supported via a rotary shaft, and a servo motor 26 with a ball screw for rotating the rotating body 25 around the Z axis in the figure.
, A first mold 28 attached to the rotating drum 25, and a work conduction port 27 opened in the first mold 28.

The first mold 28 imparts a twist to the work 2 around the Z axis.

The second mold part 30 has a fixed wall 31, an L-shaped movable table 32 mounted on the fixed wall 31 so as to be movable in the X direction in the figure, and a Y direction in the figure Slide bases 33, 33 movably mounted on the slide base, a gate-shaped movable base 34 mounted on the slide bases 33, 33 so as to be movable in the Z direction in the figure, and a swivel about the Y-axis mounted on the gate-shaped movable base 34. A rotating table 35 supported on the rotating table 35, a receiving table 36 mounted on the rotating table 35, a fixed plate 37 supported on the receiving table 36 so as to be rotatable around the X axis in the drawing, and mounted on the fixed plate 37; A second die 39 having a work conduction hole 38 in the center corresponding to the outer shape of the work 2, a servomotor 40 for X-direction movement, and motors 41 and 42 for Y-direction movement;
, A servomotor 43 for moving in the Z direction, a servomotor 44 for changing the mounting angle around the X axis, and a servomotor 45 for changing the mounting angle around the Y axis.

The second mold 39 is movable in the X, Y, and Z axes, and is pivotable about the Y and X axes. Since the first die 28 is provided with a twisting mechanism, the second die 39 can have a simple configuration.

The core feeding section 50 includes a gantry 51, a motor 52 attached to the gantry 51, a pulley 53, a pulley 54, and a timing belt 55 rotated by the motor 52.
And a moving table 56 that moves in the Z direction together with the timing belt 55, and a servo motor 5 mounted on the moving table 56.
7 and a support rod 58 which is moved in the Z-axis direction by the servomotor 57. The hollow work 2 is easily crushed during bending. Therefore, a crush prevention material called a core is used near the second mold 39. The core feeder 50 is inserted from the rear opening of the work 2 with the support rod 58 each time.

The operation of the above-described apparatus for bending and twisting a long workpiece will be described below. 2A and 2B are operation diagrams of the bending / twisting apparatus for a long work according to the present invention, wherein FIG. 2A is a perspective view of a main part, and FIG. 2B is a deflection diagram in which the state of FIG. And (c) are bending moment diagrams.
2A, the work 2 is bent upward by the second mold 39, and a torsional torque T is applied by the first mold 28.

In FIG. 2B, the center axis of the workpiece 2 is set as a neutral axis, and the outlet of the first mold 28 is set at a point A on the neutral axis. Point P
And An arbitrary distance z from the point P in the direction of the first mold 28
And the point is defined as a point Q, and the distance between the point Q and the Z axis is defined as y. When the load W acts on the point P, a bending moment M = Wz acts on the point Q. Due to the bending moment M, the neutral axis contacts the Z axis at the point A, and bends in a quadratic curve in which the distance y from the point A to the point P increases. Assuming that the distance between the point P and the point A is L, the maximum bending moment M0 = WL acts on the point A. On the other hand, the torsional torque T applied by the first mold 28 acts around the Z-axis, and any point Q other than the point A is not converted into the torsional torque T by the distance y,
Acts as a bending moment Tm.

In (c), if the bending moment M generated in the Y direction due to the load W and the bending moment Tm generated in the direction perpendicular to the bending moment M, ie, in the X direction, is R, bending by torsion is performed. Due to the moment Tm, the resultant bending moment R becomes the bending moment M
Occurs in a direction deviated by an angle θ with respect to. However, since the bending moment Tm does not occur at the point A, θ is 0 (zero), and the action direction of the maximum bending moment M0 does not deviate.

FIGS. 3A and 3B show the bending and bending of a long workpiece.
It is a comparative example of the composite bending moment diagram which acts on a workpiece by a torsion processing device. FIG. 7A is a diagram of a combined bending moment R acting on a workpiece by the conventional long workpiece bending / twisting apparatus shown in FIG. 6C. Now, assuming that the magnitude of the bending moment at which plastic deformation occurs is K, the bending is performed with a combined bending moment R exceeding K, and the workpiece is bent in the direction of the combined bending moment R. K
Is generated in the vicinity of the point A where the maximum combined bending moment M0 is generated, and the workpiece bends in a direction deviated by at least the angle θ0 from the bending moment M given as a bending process. Bending cannot be performed with high accuracy due to the angle θ0.

FIG. 2B is a diagram of the combined bending moment R of the long work bending and twisting apparatus according to the present invention shown in FIG. 2C. The portion where the combined bending moment R exceeding the bending moment K at which plastic deformation occurs is a small portion near the point A where the maximum bending moment M0 is generated. In this range, the deviation angle between the bending moment M and the combined bending moment R is obtained. θ is almost nonexistent. Therefore, when bending and twisting the long workpiece 2, the first die 28 twists around the supply axis of the work feeder 10, so that the bending by the second die 39 is affected by the twisting. It can be performed with high accuracy without receiving.

FIGS. 4 (a) to 4 (d) show an embodiment of a long work bending / twisting apparatus according to the present invention.
Is a perspective view of the work after processing, (b) is a side view, (c) is a plan view, and (d) is a front view. Radius RX, Y in X direction
The work 2 is shown that has been bent at a radius RY in the direction and twisted at an angle α around the Z axis.

In the above-described embodiment, the bending is performed by three-dimensional bending, but the same applies to two-dimensional bending. Each drive unit is an electric motor, but may be a hydraulic motor, a hydraulic or pneumatic cylinder.

[0025]

According to the present invention, the following effects are exhibited by the above configuration. An apparatus for bending and twisting a long workpiece according to claim 1 is:
A first work feeder for feeding a long work having a non-circular cross section in a straight line, and a work conduction hole for passing the long work sent thereto, wherein a first mounting angle can be changed around a supply axis of the work feeder; The mold has a work conduction hole through which the long work sent from this mold passes, and is composed of a second mold that bends the long work. Therefore, when performing bending and torsion processing on the long work, In addition, since the first die performs the twisting around the supply axis of the work feeder, the bending can be performed accurately without being affected by the twisting. In addition, since the first mold is provided with the twisting mechanism, the second mold can have a simple configuration.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an apparatus for bending and twisting a long workpiece according to the present invention.

FIG. 2 is an operation view of a bending / twisting apparatus for a long work according to the present invention.

FIG. 3 is a comparative example of a composite bending moment diagram acting on a workpiece by a bending / torsion processing apparatus for a long workpiece.

FIG. 4 is an embodiment of a long work bending and twisting apparatus according to the present invention.

FIG. 5 is a diagram showing the principle of a conventional bending / twisting apparatus for a long workpiece.

FIG. 6 is an operation diagram of a conventional long bending and twisting apparatus for a long work.

[Explanation of symbols]

1 ... Bending and torsion processing device for long work, 2 ... Work, 1
0 ... work feeder, 20 ... first mold part, 24 ... roller, 25 ... rotary cylinder, 26 ... servo motor, 27 ... work conduction hole, 28 ... first mold, 30 ... second mold part, 38 ... Work conduction hole, 39... Second type.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kenzo Takeda 1-1-10 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd.

Claims (1)

[Claims] 1. A work feeder for feeding a long work having a non-circular cross section in a straight line, and a work conduction hole for passing the sent long work, wherein a mounting angle is changed around a supply axis of the work feeder. Bending and torsion processing of a long work comprising a first mold capable of performing a long work sent from the first mold and a second mold for bending the long work. apparatus.