JPH02263521A - Pipe bender - Google Patents

Abstract

PURPOSE:To bend a pipe to the right and left with one device by arranging a clamp die unit so that it can move to a right bending position and a left bending position round a rotary die and arranging a pressure die unit so that it can move round the rotary die. CONSTITUTION:A pipe 4 to be worked is clamped between the clamp die unit 2 and the rotary die 1 at the right bending position 2a, the rotary die 1 is rotated to the right, a pusher unit 3 is moved synchronously and the pipe 4 is forced down by a right bending pusher die 3a to the rotary die 1 to perform right bending. When a next working interferes, the clamp die unit 2 is turned to the left bending position 2b, the pusher die unit 3 is moved in order of b, c, d and arranged at a left bending position 3b. A pipe feeder 5 and a core bar holding device 7 are moved in the (e) and (f) directions, arranged at positions shown by virtual lines to perform left bending. The right and left bendings can be carried out by one device.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a pipe bending device, and in particular, to a device capable of bending a pipe to be processed to the right or left. The present invention relates to a pipe bending device suitable for bending.

[Conventional technology]

For example, copper or aluminum pipes are often used as refrigerant piping for air conditioners. Recently, in an effort to downsize air conditioners, the shape of the piping has become more complex.

By the way, when bending a pipe, the bent pipe must not interfere with any part of the bending device.

Therefore, in the prior art described in Japanese Patent Laid-Open No. 59-156417, the bending head portion is made smaller in order to avoid interference between the bent pipe and the constituent parts of the device as much as possible.

In addition, as another conventional technique, two devices are prepared, one for right bending and the other for left bending. For example, when the pipe and the device interfere when bending is performed with the right bending device,
There is a technique in which bending is performed using a left-hand bending device.

Furthermore, in the prior art described in Japanese Patent Application Laid-open No. 61-255'lZ, two sets of rotating dies, flang dies, grip dies, and their drive mechanisms are provided, and one set of these is selected and used to perform bending. I'm running a 5K. According to this prior art, it is possible to perform right bending and left bending with one piece of equipment, and there is no need to prepare two apparatuses: a right bending apparatus and a compression bending apparatus.

[Problem to be solved by the invention]

However, although the conventional technique described in the above-mentioned Jikai Publication No. 459-156517 can reduce the interference between the bent pipe and the component parts of the device, there is a limit to how much interference can be avoided.

Furthermore, in the prior art described in the above-mentioned Japanese Patent Application Laid-open No. 61-255722, two main parts of the pipe bending device are provided, which increases the cost of the entire device. Since it is necessary to provide sufficient clearance so that the part and the bent pipe do not interfere with each other, there is a problem that the device becomes larger.

An object of the present invention is to solve the problems of the prior art as described above, to be able to bend the pipe to the right or to the left, to avoid interference between the bent pipe and the component parts of the device, and to achieve miniaturization and cost reduction. An object of the present invention is to provide a pipe bending device.

[Means to solve the problem]

The purpose is to provide a rotating die that is the key to bending, a clamp die unit that holds the pipe to be processed between the rotating die, a pusher die unit that presses the pipe to be processed against the rotating die, and a The rotary die can be rotated clockwise or counterclockwise during bending, and only the rotary die can be freely rotated separately from the rotation of the bending process, and the above-mentioned two-pipe die unit is connected to the rotary die. The pusher die unit is configured to be movable around the rotary die to a right bending position and a left bending position, and the pusher die unit is configured to be movable around a rotary die so that pusher dies for right bending and left bending can act, The pipe feeding device is arranged so that the pipe to be processed can be positioned inside the right side and the left side of the rotary die, and the bent part of the pipe is positioned under the rotary die.
By configuring it so that it can be twisted both upwards,
achieved.

[Effect]

When bending a pipe, for example, if you twist an already bent part downwards from the rotary die and try to perform the next bending process, the already bent part and the components of the device may interfere with each other. .

In this case, in the present invention, for example, when interference occurs when twisting downward and bending to the right, the already bent portion is twisted upward instead of twisting downward to perform a left shoulder bend.

This makes it possible to avoid interference between the already bent portion and the component parts of the device.

Furthermore, in the present invention, apart from the rotation of the rotary die for bending, only the rotary die is attached to rotate freely, and the clamp die unit and pusher die unit are configured to be positionable at each position for right bending and left bending. The pipe feed device is configured so that the pipe to be processed can be positioned on both the right and left sides of the rotary die, and the bent portion can be twisted both upward and downward, so one piece of equipment can move the pipe to the right and left sides of the rotary die. Since both bending and left bending can be performed, it is possible to downsize and lower the cost of equipment.

〔Example〕

Embodiments of the F1 invention will now be described with reference to the drawings.

FIG. 1 is a plan view of essential parts showing an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of the product.

The pipe bending device of the embodiment shown in FIG. 1 is configured to include a rotary die 1, a clamp die unit, a pusher die unit 8, a pipe feeding device t5, and a core metal holder [7]. .

The rotary die 1 serves as a screen for bending, and is mounted so that it rotates when bending the pipe 4 to be processed, and that only the rotary die 1 can rotate apart from the rotation for this bending. .

The clamp die unit 2 is adapted to grip the pipe 4 to be processed between it and the rotary die 1. Further, the clamp die unit 2 can be moved between a clamping position and an unclamping position for the pipe 4 to be processed. Furthermore, this clamp die unit 2 has a right bending position t2a shown by a solid line in FIG. 1, and a left bending position 2b shown by a reverse line.
It is configured to be rotatable.

The pusher die unit 8 has a puffer die 8a for right bending and a pusher die 8b for left bending. This pusher die unit 8 moves in synchronization with 10 rotations of the rotating die during bending of a pipe, and presses the pipe to be processed 4 against the rotating die l. It is designed so that it can be moved to a clamp position and an unclamp position. The puller die unit 8 is located at a position where the right bending die 8a faces and acts on the rotary die 1, as shown by the solid line in FIG. The pusher die 8b for left bending is configured to be able to move in parallel to the position where it faces and acts on the rotary die 1.

The pipe feeding device 5 is configured to feed the pipe 4 to be processed in the direction of the rotary die 1. Moreover, this pipe feeding device 5 has two positions for positioning the pipe to be processed 4 on the right side of the rotary die 1, as shown by a solid line in FIG. It is configured so that it can be moved to a position where the pipe 4 to be processed is positioned. Further, in this embodiment, the pipe feeding device 5 descends to the right bending position shown by the solid line in FIG. It is configured to rise at the left bending position shown by the line and twist the bent portion of the pipe above the rotary die 1.

The core metal holding device 7 is configured to hold the core metal 6, operate together with the pipe feeding device 5, and position the core metal 6 with respect to the rotary die 1.

The pipe bending device of the above embodiment is operated as follows,
act.

The solid line in FIG. 1 shows the arrangement of the components of the device when bending to the right.

In this state, the pipe feeding device 5 and the core metal holding device 7 move the pipe to be processed 4 and the core metal 6 to the right position of the rotary die 1.
and clamp the pipe 4 to be processed between the clamp die unit 2 and the rotary die l at the right bending position d2a,
At the same time as rotating the rotary die 1 to the right, the pusher die unit 8 is moved synchronously, and the pusher die 8 for right bending is moved.
Press the pipe to be processed against the rotary die 1 using a, and perform the right bending process.

In this bending process, when the bent part of the pipe is twisted below the rotary die 1 and the next bending process is performed, the bent part and the component parts of the apparatus may interfere with each other. In that case, the clamp die unit 2 and the pusher die unit 8 are moved to the unclamping position, and the pipe to be processed 4 and the core bar 6 are moved above the rotary die 1 by the pipe feeding device 5 and the core bar holding device 7. .

Next, only the rotary die 1 is fixed, and the clamp die unit 2 is fixed.
The pusher die unit 8 is rotated in the direction of the arrow a in FIG.
The pusher die 8b for left bending is placed in the operating position. In addition, the pipe feeding device 5 and the core metal holding device 7 are
The device is moved in the directions of arrows e and f in the figure, and the constituent parts of the device are placed at the positions shown by the imaginary lines in FIG. 1, respectively.

In this state, the wave power Loe pipe 4 and the core metal 6 are moved downward by the pipe feeding device 5 and the core metal holding device 7,
Match the rotating die IVc.

Here, instead of twisting the bent portion of the pipe downward to the rotary die 1 and performing the next right bending process, it is twisted upward and performing the left bending process. For example, if you twist an already bent part downward and bend it to the right, and the already bent part interferes with the component parts of the device, you can twist it upward and bend it to the left. It becomes possible to perform the bending process while avoiding interference between the bent part and the component parts of the device.

In addition, the product 8 obtained by the bending process described above was used as the second product.
As shown in the figure.

〔Effect of the invention〕

The present invention described above includes a rotary die that is a bending die, a clamp die unit that grips the pipe to be processed between the rotary die, and a punch-ya die unit that presses the pipe to be processed against the rotary die. A pipe feeding device that sends a pipe to be processed to a rotary die, the rotary die can be rotated clockwise or counterclockwise during bending, and only the rotary die can be rotated freely apart from the rotation of the bending process.
The pusher die unit is configured to be movable around the rotating die between a right bending position and a left bending position, and the pusher die unit is movable around the rotating die so that the pusher die unit can be operated by right bending and left bending pusher dies. The pipe feeding device is configured to be able to position the pipe to be caroeed on both the right and left sides of the rotary die, and to twist the bent portion of the pipe both below and above the rotary die.

Therefore, according to the present invention, when interference occurs, for example, when twisting downward and bending to the right, instead of twisting the already bent part downward, it is possible to twist the already bent part upward to perform a left bend. This has the effect of avoiding interference between the bent portion and the constituent parts of the device t.

Further, according to the present invention, apart from the rotation of the rotary die for bending, only the rotary die is rotatably mounted, and the clamp die unit and the pufunya die unit are placed at respective positions for right bending and left bending. The pipe feed device is configured to be able to position the pipe to be processed on both the right and left sides of the rotating die D, and to twist the bent portion both upward and downward. Since it is possible to perform both right-hand and left-hand bends with one machine's equipment, it also has the effect of making the equipment more compact and lowering costs.

[Brief explanation of drawings]

FIG. 1 is a plan view of essential parts showing an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of the product. 1... Rotating die 2... Clamp die unit 2
a... Right bending position of clamp die unit 2b.
...Same left bending position t8...Pusher die unit 3a...Pusher die for right bending 8b...
``Left bend river pusher die 4...To be processed pipe 5
... Pipe feeding device 6... Core metal 7... Core metal holding device 8... Product. 10th four-turn straight 2 Krasif 1 zui Uni Rido 2n 7 Rashi 71 Kui... 1-0 mmsu (equipment)

Claims (1)

[Claims] 1. A rotating die that is a mold for bending, a clamp die unit that holds the pipe to be processed between the rotating die, a pusher die unit that holds the pipe to be processed against the rotating die, and a clamp die unit that holds the pipe to be processed against the rotating die. The rotary die can be rotated clockwise or counterclockwise during bending, and only the rotary die can be freely rotated independently of the bending rotation, and the clamp die unit can be rotated clockwise or counterclockwise around the rotary die. The pusher die unit is configured to be movable between a bending position and a left bending position, the pusher die unit is configured to be movable around a rotary die so that pusher dies for right bending and left bending can act, and the pipe feeding device is configured to be movable around a rotating die so that the pusher die for right bending and left bending can act. A pipe bending device characterized in that the pipe to be processed can be positioned on both the right and left sides of a rotating die, and the bent portion of the pipe can be twisted both below and above the rotating die.