JPH03248719A - Method and device for bending bar like member - Google Patents

Abstract

PURPOSE:To easily form the prescribed bent shape with high accuracy by moving the moving roll successively toward the axially longitudinal direction of the bar like member, and also moving the moving roll so as to make its locus to the same shape with the bent shape to be formed on the bar like member in correspondence with the above moving. CONSTITUTION:The moving roll 61 is brought in contact with the bend beginning point 59 of the bar like member 43 by driving the motor 67, 75 of the roll moving mechanism 63. And then the bar like material 43 is successively moved toward the axially longitudinal direction of the bar like member 43 by rotating the sprocket 57 of the bar like member moving mechanism 49. On the same time, the bent part 77 is formed by respectively driving the motor 67, 75 of the roll moving mechanism 63 with the preliminarily set number of rotation, and successively moving the moving roll 61 so as to make its locus to the same shape as the bending shape to be formed on the bar like member 43 in correspondence with the moving of the bar like member 43. Therefore, the prescribed bent shape is easily obtained with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for bending a rod-shaped member such as a pipe into a predetermined shape.

[Conventional technology]

Generally, in order to bend a rod-shaped member such as a pipe into a predetermined shape, a rod-shaped member bending device such as that disclosed in Japanese Patent Application Laid-Open No. 63-248518, for example, is used.

FIG. 5 shows a bending device for a rod-shaped member disclosed in this publication. In the figure, reference numeral 11 indicates the device body, and the device body 11 includes a rod-shaped member 13 such as a pipe, etc.
A fixed roll 15 is disposed to support the roller so as to be movable in the axial direction.

Two pairs of fixed rolls 15 are arranged with the rod-shaped member 13 sandwiched therebetween, and each fixed roll 15 is configured to be rotatable about an axis l7.

The rod-shaped member 13 is attached to the rear part of the rod-shaped member 13.
A rod-shaped member moving mechanism 19 that sequentially moves in the axial direction of the
is located.

This rod-shaped member moving mechanism 19 has a support member 21 that supports the rod-shaped member 13 , and this support member 21 is supported by a pressing member 23 .

The pressing member 23 has one end fixed to a chain 25, and the chain 25 is meshed with a pair of sprockets 27 arranged at a predetermined interval.

On the other hand, a moving roll 31 that is movable in a direction perpendicular to the axial direction of the rod-like member 13 is in contact with the bending point 29 of the rod-like member 13 .

In the rod-shaped member bending device configured as described above, the moving roll 31 is moved slightly downward at the start of bending, and after this, the moving roll 31 is fixed, and the moving roll 31 is moved to the bending point 29 of the rod-shaped member 13. By driving the sprocket 27, moving the pressing member 23, and sequentially moving the rod-shaped member 13 in the axial direction of the rod-shaped member 13, the rod-shaped member is brought into contact with the moving roll 31. 13 are sequentially bent to form a curved bent portion 33.

[Problem to be solved by the invention]

However, in such a conventional bar-shaped member bending device, the moving roll 31 is fixed and the bending point 2 of the bar-shaped member 13 is fixed.
Since the rod-shaped member 13 is simply moved with the moving roll 31 in contact with the rod-shaped member 9, the radius of curvature changes gradually, especially when starting bending while moving the moving roll 31, so that the rod-like member 13 has an accurate radius of curvature. There was a problem in that it was very difficult to form the bent portion 33.

The present invention was made in order to solve such conventional problems, and an object of the present invention is to provide a method and apparatus for bending a rod-shaped member that can easily obtain a predetermined bent shape with high precision. shall be.

[Means to solve the problem]

In the method of bending a rod-shaped member of the present invention, a movable roll is brought into contact with a bending start point of a rod-shaped member supported movably in the axial direction by a fixed roll, and then the rod-shaped member is moved in the axial direction of the rod-shaped member. The moving roll is moved in response to the movement of the rod-shaped member so that its locus has the same shape as the bent shape to be formed on the rod-shaped member.

A bending device for a rod-shaped member according to the present invention includes: a fixed roll that supports a rod-shaped member movably in the axial direction; a rod-shaped member moving mechanism that sequentially moves the rod-shaped member in the axial direction of the rod-shaped member; A moving roll that comes into contact with the bending start point of the member, and a roll moving mechanism that moves this moving roll in response to the movement of the rod-shaped member so that its locus has the same shape as the bending shape to be formed on the rod-shaped member. It has the following.

[For production]

In the method for bending a rod-shaped member of the present invention, in response to the movement of the rod-shaped member, the movable roll is moved such that its locus has the same shape as the bending shape to be formed on the rod-shaped member.

In the rod-shaped member bending device of the present invention, the roll moving mechanism moves the movable roll in response to the movement of the rod-shaped member so that its locus has the same shape as the bending shape to be formed on the rod-shaped member.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, details of the present invention will be described with reference to an embodiment shown in the drawings.

FIG. 1 shows an embodiment of a bending device for a rod-shaped member according to the present invention. In the figure, reference numeral 41 indicates a device main body, and a rod-shaped member 43 such as a pipe is attached to the main body 41 of the device. Three fixed rolls 45 that are movably supported in the longitudinal direction are arranged.

These fixed rolls 45 sandwich the rod-shaped member 43 and
In addition, in front of the lower fixed roll 45,
One fixed roll 45 is arranged.

Each fixed roll 45 is configured to be rotatable around a shaft 47.

At the rear of the rod-shaped member 43, the rod-shaped member 43 is connected to the rod-shaped member 43.
A rod-shaped member moving mechanism 49 that sequentially moves in the axial direction of the
is located.

This rod-shaped member moving mechanism 49 has a pressing member 51 that presses the rear end of the rod-shaped member 43 in the axial direction of the rod-shaped member 43.

This pressing member 51 has one end fixed to a chain 55 via a bracket 53, and this chain 55 is
It is meshed with a pair of sprockets 57 arranged at a predetermined interval.

On the other hand, a moving roll 61 is in contact with a bending start point 59 of the rod-shaped member 43 .

The moving roll 61 is configured to be movable by a roll moving mechanism 63 in response to the movement of the rod-shaped member 43 so that its locus has the same shape as the bent shape to be formed on the rod-shaped member 43. .

That is, as shown in FIG. 2, the moving roll 61 is supported by a mover 62 that is screwed onto a vertical screw shaft 63 made of, for example, a ball screw, and this vertical screw shaft 63 is supported by a moving member 65. has been done.

This vertical screw shaft 63 is configured to be rotatable by a motor 67.

On the other hand, a pair of brackets 69 are arranged at a predetermined interval on the device main body 41, and between these brackets 69, a horizontal screw shaft 71 and a guide shaft 73 made of, for example, a ball screw are arranged in parallel. There is.

The horizontal screw shaft 71 is configured to be rotatable by a motor 75.

Further, the horizontal screw shaft 71 and the guide shaft 73 are connected to the moving member 6
5, and the moving member 65 is inserted into the horizontal screw shaft 71.
It is said that it can move freely in the horizontal direction by rotating.

Bending of the rod-shaped member 43 using the rod-shaped member bending apparatus configured as described above is performed as described below.

That is, first, as shown in FIG. 3, by driving the motors 67, 75 of the roll moving mechanism 63, the moving roll 61 is brought into contact with the bending start point 59 of the rod-shaped member 43.

Thereafter, by rotating the sprocket 57 of the rod-shaped member moving mechanism 49, the rod-shaped member 43 is moved.
are sequentially moved in the axial direction.

At the same time, the motor 6 of the roll moving mechanism 63
7.75 at preset rotational speeds, the movable roll 61 is moved so that its locus has the same shape as the bent shape to be formed on the rod-shaped member 43 in response to the movement of the rod-shaped member 43. Then, as shown in FIG. 4 and FIG. 1, the bent portion 77 is formed.

Note that the rotation speed of the motor 67.75 is controlled by the control device according to the moving speed of the rod-shaped member 43 and the shape of the bent portion 77 to be formed. horizontal movement speed and vertical screw shaft 63
is rotated so that the moving speed is the same as the moving speed.

Thus, in the rod-shaped member bending device configured as described above, the rod-shaped member bending device includes the fixed roll 45 that supports the rod-shaped member 43 movably in the axial direction, and the rod-shaped member 43.
a rod-shaped member moving mechanism 49 that sequentially moves the rod-shaped member 43 in the axial direction; a moving roll 61 that comes into contact with the bending start point 59 of the rod-shaped member 43; Correspondingly, since the roll moving mechanism 63 is configured to move so that its locus has the same shape as the bent shape to be formed on the rod-shaped member 43, the roll moving mechanism 63 can move the rod-shaped member 43 in accordance with the movement of the rod-shaped member 43. Since the movable roll 61 is moved so that its locus has the same shape as the bent shape to be formed on the rod-shaped member 43, it becomes possible to easily obtain a predetermined bent shape with high precision. .

In addition, in the method of bending a rod-shaped member of the present invention, the fixed roll 4
A rod-shaped member 43 supported movably in the axial direction by 5.
After the moving roll 61 comes into contact with the bending start point 59, the rod-shaped member 43 is sequentially moved in the axial direction of the rod-shaped member 43, and in response to the movement of the rod-shaped member 43, the moving roll 61 is moved so that its locus has the same shape as the bent shape to be formed on the rod-shaped member 43, so that the moving roll 6 moves in response to the movement of the rod-shaped member 43.
1 is moved so that its locus becomes the same shape as the bent shape to be formed on the rod-shaped member 43, making it possible to easily obtain a predetermined bent shape with high precision.

In addition, in the embodiment described above, an example was described in which the pressing member 51 was moved via the chain 55.
The present invention is not limited to such embodiments, and it goes without saying that the pressing member may be moved by a known mechanism such as rotating a screw shaft by a motor.

〔Effect of the invention〕

As described above, in the rod-shaped member bending device of the present invention,
A bending device for a rod-shaped member includes a fixed roll that supports the rod-shaped member so as to be movable in the axial direction, a rod-shaped member moving mechanism that sequentially moves the rod-shaped member in the axial direction of the rod-shaped member, and a bending start point of the rod-shaped member. and a roll moving mechanism that moves this moving roll in response to the movement of the rod-shaped member so that its locus has the same shape as the bent shape to be formed on the rod-shaped member. In response to the movement of the rod-shaped member, the roll movement mechanism moves the movable roll so that its locus has the same shape as the bending shape to be formed on the rod-shaped member, so the predetermined bending shape can be formed with high precision. and can be easily obtained.

Further, in the method of bending a rod-shaped member of the present invention, after the movable roll is brought into contact with the bending start point of the rod-shaped member supported movably in the axial direction by the fixed roll, the rod-shaped member is moved along the axial length of the rod-shaped member. In addition to moving the rod-shaped member sequentially in the direction, the moving roll is also moved so that its locus has the same shape as the bent shape to be formed on the rod-shaped member. In response to the movement of the rod-shaped member, the moving roll is moved so that its locus has the same shape as the bent shape to be formed on the rod-shaped member, so that a predetermined bent shape can be easily obtained with high precision. It has the advantage of being able to

[Brief explanation of drawings]

FIG. 1 is a top view showing an embodiment of a bending device for a rod-shaped member according to the present invention. FIG. 2 is a side view of FIG. 1. FIG. 3 is an explanatory view showing the state of the bar-shaped member bending apparatus shown in FIG. 1 at the time of starting the bending process. FIG. 4 is an explanatory view showing a state at the middle point of the bending process of the bar-shaped member bending device shown in FIG. 1. FIG. 5 is a top view showing a conventional bending device for a rod-shaped member. [Explanation of symbols of main parts] 43... Bar-shaped member 45... Fixed roll 49... Bar-shaped member moving mechanism 59... Bending start point 61... Moving roll 63... Roll moving mechanism. Figure 3 Figure 3 Figure 3

Claims (2)

[Claims] (1) After a movable roll is brought into contact with the bending start point of a rod-shaped member supported movably in the axial direction by a fixed roll, the rod-shaped member is sequentially moved in the axial direction of the rod-shaped member, and A method for bending a rod-shaped member, characterized in that, in response to the movement of the rod-shaped member, the movable roll is moved such that its locus has the same shape as the bending shape to be formed on the rod-shaped member. (2) A fixed roll that supports the rod-shaped member movably in the axial direction; a rod-shaped member moving mechanism that sequentially moves the rod-shaped member in the axial direction; It is characterized by having a moving roll in contact with the moving roll, and a roll moving mechanism that moves the moving roll in response to the movement of the rod-shaped member so that its locus has the same shape as the bent shape to be formed on the rod-shaped member. A device for bending rod-shaped members.