JPS6334791Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE PRESENTING The present invention relates to a tube cutting apparatus, and more particularly to an apparatus for cutting a tube by plasma arc, suitable for cutting a small diameter tube.

Generally, a plasma fusing device is used to cut metal pipes and the like. In this case, for large-diameter metal pipes, the torch of the fusing device is placed inside the metal pipe, and the arc is generated from the inside to the outside to fuse and cut the pipe, causing the spatter to scatter outward. Does not adhere to the inner surface of the tube. However, in the case of small-diameter metal tubes, it is not easy to position the torch inside the tube, and therefore it is not possible to melt the tube outward from the inside. Therefore, in the case of small-diameter pipes, it is inevitable that spatter will adhere to the inside of the pipe. In particular, when the metal tube is a bellows tube, spatters adhere to the inner surface of the pipe in such a way that they are caught between the valleys, and it is difficult to remove them in post-processing.

In order to solve the above-mentioned drawbacks, the tube fusing device of the present invention has a chuck portion which holds the metal tube rotatably in the circumferential direction, into which the metal tube is inserted and removed, and a chuck portion which is fixed at a predetermined position on the outer circumferential side of the metal tube. a torch, and an opening formed in the outer surface of the metal tube, the torch being biased toward the torch inside the metal tube and housed inside the metal tube such that the outer surface of the torch-side outer surface is close to the inner surface of the metal tube. It consists of a cylindrical receiving member having an outer diameter smaller than the inner diameter of the metal tube set so as to correspond to the torch, and almost 100% of the spatter generated when the metal tube is melted is collected. The purpose of the present invention is to provide a tube fusing device which can eliminate post-processing steps and which can cut metal tubes while maintaining their quality. This will be explained in detail below using examples.

FIG. 1 is a simplified configuration diagram showing an embodiment of a tube fusing device according to the present invention. In the figure, a cylinder device 2 is installed on a base plate 1, and a rod 3 of this cylinder device 2 is slidable. A holding member 4 is attached, which has a hollow portion 5, into which a cylindrical sputter receiving member 6 is inserted and held. A chuck portion 9 is fixed to the rear side of the substrate 1 for holding a metal tube 8 to be cut and for rotating the metal tube 8 in a fixed direction. One end of the receiving member 6 extends in the direction of the chuck portion 9, and has an opening 11 at a location corresponding to a portion 10 where the metal tube 8 is cut. A torch 12 of a fusing device is fixed to the upper part corresponding to the cut portion 10, and an arc is generated from the outside of the upper part of the tube 8 toward the inside. The other end of the receiving member 6 protrudes from the holding member 4, and a lid 13 is provided at its tip, and a spatter outlet 14 protrudes downward from the lower part of the tip. A storage container 15 that interlocks with the holding member 4 is provided. A flexible pipe 16 is inserted through the hole provided in the lid 13, and the tip of the flexible pipe 16 is oriented toward the lid 13 so as to be folded back along the curved portion 17 at the tip of the receiving member 6, and the tip of the flexible pipe 16 is directed toward the lid 13. Remove the spatter 18 from the outlet 1
Spray in 4 directions.

The operation of the pipe fusing device having the above configuration will be described below. First, the position of the stopper surface 19 of the holding member 4 from the torch 12 is set to a predetermined position by the cylinder device 2, and the metal tube 8 is moved from the chuck part 9 side toward the holding member 4, and its tip is The metal tube 8 is held by tightening the chuck portion 9 in contact with the stopper surface 19. Next, while rotating the metal tube 8 in a fixed direction by the chuck part 9, an arc 18 is blown from the torch 12 to position 1.
Fuse the 0 part. As a result, the metal tube 8 is fused around the entire circumference by the arc 18 . Spatter generated at this time is accommodated in the receiving member 6 through the opening 11. At this time, by sending air at high speed from one end of the pipe 16, the spatter can be effectively sent to the discharge port 14 side while being cooled, and the spatter can be collected all at once in the storage container 15. If there is no flexible pipe 16, after the flexible pipe 16 is fused, the receiving member 6 is removed from the holding member 4, and the spatter inside thereof is discharged from the discharge port 14.

Next, when the above fusing is completed, the cylinder device 2
After moving the holding member 4 in the opposite direction to the chuck part 9, the melt-cut metal tube 8A of a predetermined size placed on the receiving member 6 is pulled out in the direction of the chuck part 9 and removed. The device 2 is driven again, the holding member 4 is transferred toward the chuck portion 9, and then the metal tube 8 is transferred from the chuck portion 9 to the holding member 4.
The tip is brought into contact with the stopper surface 19 and cut by melting in the same manner as described above. According to the above embodiment, the metal tube 8 is rotated and fused while the outer surface of the receiving member 6 on the side closer to the torch is always close to (preferably in contact with) the inner surface of the metal tube 8, so that the metal tube 8 is fused. There is no significant sagging or deformation in the middle or near the end of fusing. In addition, since the chuck portion 9 rotates the metal tube 8 as the material to be cut, the receiving member 6,
Since the torch 12 can also be fixed, the configuration is simple. Moreover, since the receiving member 6 is always set so that the opening 11 is located at the melted part of the metal tube 8 corresponding to the torch 12, the spatter is not attached to the opening 11.
Almost 100% of the particles are collected by the receiving member 6 via the metal pipe 1, and do not adhere to the inner surface of the metal tube 8. Further, since the outer diameter of the receiving member 6 is smaller than the inner diameter of the metal tube 8, the metal tube 8 can be inserted and removed while keeping its inner surface close to a part of the outer surface of the receiving member 6.
It can be easily set and released, and work can be done quickly.

In the present invention, a suction pipe 30 may be provided, as shown in FIG. 2, with one end opening toward the opening 11 and the other end extending outward through the lid 13. In such a configuration, spatter can be sucked by the suction device through the suction pipe 30 and discharged to the outside through the pipe 30 from the opening 31 side. However, in this case as well, some of the spatter is accommodated in the receiving member 6, so that it does not adhere to the inner surface of the metal tube.

As explained above, according to the tube fusing device according to the present invention, a metal tube is inserted and removed, and a chuck portion that holds the metal tube rotatably in the circumferential direction and a chuck portion that is fixed at a predetermined position on the outer circumferential side of the metal tube. a torch which is deviated toward the torch inside the metal tube, and is housed inside the metal tube such that the outer surface on the side closer to the torch is close to the inner surface of the metal tube, and is formed on the outer surface on the side closer to the torch. Since the opening is configured with a cylindrical receiving member having an outer diameter smaller than the inner diameter of the metal tube set to correspond to the torch, the metal tube is supported by the receiving member and the sputter is stored. It is possible to prevent spatter from adhering to the inner surface of the metal tube, and it is possible to omit the post-treatment process of the metal tube, reducing the burden on the operator and increasing mass productivity. . In addition, the quality of the metal tube can be maintained because the metal tube does not sag or deform during or near the end of fusing. Moreover, the metal tube can be easily set and released from the receiving member, and the work can be done quickly. Furthermore, since both the receiving member and the torch are fixed, the configuration is simplified.

[Brief explanation of the drawing]

FIGS. 1 and 2 are simplified configuration diagrams showing an embodiment of a pipe fusing device according to the present invention. DESCRIPTION OF SYMBOLS 1... Board, 2... Cylinder device, 3... Rod, 4... Holding member, 6... Receiving member, 11...
Opening, 12...Torch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A chuck portion into which a metal tube is inserted and removed and which holds the metal tube rotatably in the circumferential direction; a torch fixed at a predetermined position on the outer circumferential side of the metal tube; The metal tube is housed inside the metal tube so that the outer surface on the torch side is close to the inner surface of the metal tube, and the opening formed on the outer surface on the torch side is biased toward the torch. 1. A tube fusing device comprising a cylindrical receiving member having an outer diameter smaller than the inner diameter of a metal tube set so as to correspond to the inner diameter of the metal tube. (2) The receiving member is held by a holding member that is movable along the axial direction of the metal tube, and can be stored from the tip side of the metal tube.Claim 1 of the Utility Model Registration Claim. The pipe fusing device described.