JPS5810175B2 - Kannosetudanouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for cutting pipes, in particular pipes coming from a spiral tube arrangement.

More specifically, it includes a tube cutter, a holding device that holds the cutter, and a support device that supports the holding device, the support device clamping the tube and moving the holding device in the direction of rotation of the tube. The present invention relates to a tube cutting device which is supported to be rotatable and to move together with the tube in the forward direction of the tube.

The object of the present invention is to provide a device which makes it possible by simple means to make clean, straight cuts at right angles to the tube axis, the cut surfaces of which remain clean and straight even during movement of the tube.

In the present invention, in order to solve this object, the annular fastener disposed around the tube is connected to a frame, the fastener connected to the frame is an arcuate fitting, and the fastener is connected along the frame to the frame. a roller provided on the pipe, a guide device engaged with the roller and arranged to be rotatable with respect to the frame, a cutter provided on the guide device, and a cutter arranged horizontally and parallel to the pipe. a guide track, the clamping means are provided on the frame with a support element with a ball head for supporting the frame on the tube, and the clamping is provided with a support element on the arc fitting cooperating with the support element A tightening element is provided for fixing the frame to the pipe, and the guide device is movably supported on the guide track via a support arm provided on the guide device. A device is proposed.

In addition, at least three support elements or clamping elements are arranged in the clamping frame, and the supporting elements have elastically supported ball heads.

The support arm resting on the guide track also has a spherical head.

Preferably, the support element and the clamping element are each arranged so as to be adjustable in position, that is, the annular clamping element is arranged so that its position can be adjusted in the radial direction of the frame.

This allows the device to be easily used for tubes having different diameters.

The guide device is supported by a support arm so that it can move along a guide track, that is, in the axial direction of the tube.

Preferably, it is supported so as to be movable not only in the axial direction of the tube but also in a direction perpendicular to the axial direction (radial direction of the tube).

This is to allow the guiding device to sufficiently follow the radial movement of the tube that may occur when the tube is delivered from the spiral tube device.

This bidirectional movement is achieved, for example, by providing a ball head on the support arm.

Preferably, the cutter is arranged so that it can be rotated through approximately 45 DEG within the guide device.

Since the tube sent out from the spiral tube device itself rotates, essentially it is sufficient to simply mount the cutter fixedly on the guide device, but considering various cases, it is preferable to install it so that it can be rotated. In that case, it is sufficient to provide a rotation capacity of about 45''.

When using this device, the frame is pushed in front of the tip of the tube, and an adjustable support with an elastic ball head and clamp adjusts the element to the outside diameter of the tube as it slides over the tube surface.

When the pipe length to be cut is reached, the frame is tightened by the tightening element.

The elastic ball head then retracts so that the frame rests firmly on the tube surface.

The tube thus advances together with the entire device during forward movement.

The cutting nozzle, which can be swiveled around by approximately 45° in a guide device secured in the frame, is lifted slightly for piercing and then placed with its support arm on a guide track arranged parallel to the tube. It will be done.

The cutting nozzle is compensated by a ball head in the support arm for any pivoting movement of the tube that occurs for weld gap control, achieving an even and clean cut.

Once the tube length has been cut off, the clamping of the frame is loosened so that the bulb head reappears and the entire device is returned to its next cutting position.

The accompanying drawing shows a preferred embodiment of the device according to the invention.

In FIG. 1, the tube 1 is surrounded by a clamping frame 2. In FIG.

The clamping frame 2 is supported on the tube surface by a support element 5 which is provided with an elastic ball head 4 and is arranged in such a way that its position can be adjusted.

The tube can thus slide through the frame when the frame is stationary or moving over the tube, with the ball head rolling along the tube surface.

The clamping of the tube before cutting is carried out via a clamping bow 3 by a clamping element 6 arranged thereon, which is also adjustable in position.

A cutter 7 is arranged in the guide device 8 such that it can rotate through approximately 45° within the guide device 8 .

The rollers 12 on the clamping frame 2 enable relative rotation between the clamping frame 2 and the guide device 8 on a trajectory perpendicular to the tube axis.

The cutter 7 is movable in the axial and radial direction of the tube via the ball head 10 by means of a support arm 9 and is guided by a horizontal guide track 11.
supported on top.

The cutting device used is a conventional cutting burner, such as those widely used in the metal industry.

The operation of the invention will now be explained in the case where the pipe to be cut comes from a spiral seam welding device.

When producing tubes from sheet metal strips with this device, a continuous rotation of the tube takes place, so that the tightened clamp also rotates the frame 2 with it.

However, the cutter 7 remains approximately in the position shown in FIG.

The tube is thus rotated in front of the cutter, so that the cut is made over its entire circumference.

During tightening, the frame 2 rotates together with the tube and the guide device 8 is guided by rollers, so that a clean cut surface is produced.

The cutting device according to the present invention has a simple structure, can obtain a clean cut surface that is not affected by the rotational movement or feeding of the pipe, and can cut off various pipe lengths one after another without incurring special costs. By clamping the device to the tube itself, the device moves forward with the tube, thus eliminating the need for a separate transport device for the device.

Note that, like the present device, it includes a tube cutter, a holding device that holds the cutter, and a support device that supports the holding device,
JP-A No. 47-18 discloses a cutting device in which the support device clamps the tube and supports the holding device so that it can rotate freely in the direction of rotation of the tube and move together in the direction of advancement of the tube.
It is described in Publication No. 089.

However, the device described in this publication is completely different from the present invention in the structure of the holding device for the cutter and the supporting device that supports the holding device, and is structurally more complex, larger, and more expensive than the present device, and is also difficult to use. It's a hassle.

In contrast, the device of the present invention, as is clear from the illustrated device,
It has a simple structure, is small in size, is inexpensive, and is easy to use.Moreover, the cutting performance is not inferior in any way, and it is a device of extremely high practical value.

[Brief explanation of drawings]

Figure 1 shows the cross section of the device, Figure 2 shows the first section with the cutting nozzle.
FIG. 1...Pipe, 2...Tighten the frame, 3
...Tightening is done by bow-shaped fitting, 4, 10... Ball head, 5 ... Supporting element, 6 ... Tightening is done by element, 7... ... Cutting device, 8 ... Guide device,
9... Support arm, 11... Guide track, 12... Roller.

Claims (1)

[Claims] 1 A tube cutter, a holding device that holds the cutter, and a support device that supports the holding device, the support device clamping the tube and allowing the holding device to freely rotate in the direction of rotation of the tube. In the tube cutting device, the tube is supported so as to move together in the forward direction of the tube.
The clamp connected to the frame 2 comprises an arcuate fitting 3 and rollers 12 provided on the frame 2 along the frame 2; A support element 5 with a ball head 4 is provided, and the fastening arc fitting 3 is provided with a fastening element 6 for fixing the frame 2 to the tube 1 in cooperation with the support element 5. The holding device is constituted by a guide device 8 which is engaged with the roller 12 and is rotatably arranged with respect to the frame 2. The guide device 8 is provided with the tube cutter 7, and a guide track 11 disposed parallel to the tube 1, and the guide device 8 is movably supported on the guide track 11 via a support arm 9 provided on the device 8. pipe cutting equipment.