JPH04300115A - Cutting device for bead on internal surface of seam welded pipe - Google Patents

Abstract

PURPOSE:To cut off and remove beads from the internal surface of a seam welded pipe without producing a notch, etc., on the internal surface of it and without using a special driving mechanism, etc. CONSTITUTION:A device is composed of a trimmer 4 which is inserted into a seam welded pipe 1 along its axis and on which a bite 5 for cutting beads 2 on the surface of the pipe 1 is provided, rollers 7 which are mounted on the trimmer 4 and made in contact rotatably with the internal surface of the pipe 1, a pair of upper and lower rotating bites 9 and 9' provided on the trimmer 4, and belts 10 applied between the rollers 7 and rotating bites 9 and 9', respectively. The rotating bites 9 and 9' are driven by rotational movement of the rollers 7 transmitted by the belts 10, and continued bead cut by the bite 5 is cut off in short pieces and removed by the rotating bites 9 and 9'.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for cutting internal beads generated during the production of electric resistance welded pipes.

0002

2. Description of the Related Art When manufacturing an electric resistance welded tube by electric resistance welding, beads are generated on the inner and outer surfaces of the electric resistance welded portion. It is necessary to cut and remove the generated beads with a cutting tool during finishing, but it is not easy to continuously and accurately remove the inner beads with high efficiency. For this purpose, various inner bead cutting devices have been proposed.

For example, in Japanese Patent Publication No. 61-24130,
An internal bead cutting device as shown in FIG. 3 is disclosed. As shown in FIG. 3, in order to continuously cut the inner bead 2 of the ERW tube 1, a cutting device A' inserted into the ERW tube 1 is attached to the upper part of the trimmer 4. A rotatable notch roller 6 having a cutting tool 5 for continuous cutting of the inner bead 2, a notch tool 6a for notching the inner bead 2 perpendicular to the tube axis, and an electric motor attached to the lower part of the trimmer 4. It consists of a rotatable roller 7 that comes into contact with the lower inner surface of the sewing tube 1. 8 is a cutting tool for cutting the outer bead 3.

According to the above-mentioned device, by relatively moving the ERW tube 1 and the cutting device A' in the direction of the tube axis of the ERW tube 1, the inner bead 2 is aligned with the tube axis by the notch roller 6. Orthogonal notch processing is performed, and then the cutting tool 5
are sequentially cut by The cut inner bead 2 is
By the notch processing by the notch roller 6, the short pieces are removed from the electric resistance welded tube 1. In this way, cutting the cut inner bead 2 into short pieces and removing it is extremely important for efficiently and safely discharging the cut inner bead 2 from the inside of the pipe.

[0005]

SUMMARY OF THE INVENTION The conventional cutting device described above has the following problems. That is, when notching the inner bead 2 perpendicular to the tube axis using the notch roller 6, if the pressing force of the notch roller 6 against the inner bead 2 is weak, the inner bead 2 cannot be properly cut and removed. . On the other hand, if the pressing force of the notch roller 6 is too strong, notch flaws will occur on the inner surface of the electric resistance welded tube and its quality will deteriorate.

On the other hand, Japanese Patent Laid-Open No. 83886/1986 discloses that when cutting the inner bead of an ERW pipe,
A cutting tool continuously cuts the bead without performing notching using a notch roller as described above, and then the cut continuous bead is cut into pieces of fixed size and removed by a rotating cutting tool that is rotated by a separately provided drive mechanism. An apparatus is disclosed comprising:

However, in the case of the above-mentioned device,
The drive mechanism for the rotary cutting tool that cuts the continuous bead that has been cut and removed from the inner surface of the tube requires a drive source such as a motor or cylinder, which increases the size of the device.
There are problems such as high cost and unsuitability for cutting the inner bead of a small diameter electric resistance welded tube.

[0008] Therefore, an object of the present invention is to solve the above-mentioned problems and to improve the inner bead of an electric resistance welded tube without causing notch defects or the like on the inner surface of the tube and without requiring a special drive mechanism. Another object of the present invention is to provide an inner bead cutting device for an electric resistance welded tube, which can efficiently and accurately cut and remove the inner surface of the electric resistance welded tube into short pieces.

[0009]

[Means for Solving the Problems] The present inventors have conducted extensive research in order to solve the above-mentioned problems. As a result, without notching with a notch roller,
Continuously cut the inner bead with a cutting tool, then
If the cut continuous bead is shredded to a certain size by a rotating cutting tool driven by the rotational movement of the trimmer's roller due to friction with the inner surface of the tube, the inner bead will cause notches etc. to occur on the inner surface of the tube. It has been found that the particles can be efficiently and accurately cut into short pieces and removed without the need for a special drive mechanism or the like. The present invention has been made based on the above findings, and includes a trimmer that is inserted into an ERW tube along its axis and is equipped with a cutting tool for cutting an inner bead of the tube; a roller attached to the trimmer that rotatably contacts the inner surface of the tube; and a pair of upper and lower rotation rollers provided on the trimmer for cutting the continuous inner bead cut by the cutting tool into short pieces. A belt is provided between the rotary tool and the roller for transmitting rotational motion of the roller due to friction between the tool and the inner surface of the tube to the rotating tool and causing it to rotate. It has particular characteristics.

[0011]

[Operation] According to the device of the present invention, the continuous inner bead cut by the cutting tool attached to the trimmer is rotated by a pair of upper and lower rotations caused by the rotational movement of the roller of the trimmer due to friction with the inner surface of the pipe. By part-time job,
Shredded into short pieces. Therefore, continuous beads can be efficiently and accurately cut into short pieces and removed without requiring a special drive mechanism or the like.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings. FIG. 1 is a schematic front view showing one embodiment of the apparatus of the present invention, and FIG. 2 is a view taken along arrow a in FIG. As shown in the drawing, the cutting device A of the present invention inserted into the inside of the electric resistance welded pipe 1 has a cutting tool 5 for continuous cutting of the inner bead 2 attached to the upper part of the trimmer 4, and a cutting tool 5 attached to the lower part of the trimmer 4. A rotatable roller 7 that contacts the lower inner surface of the electric resistance welded tube 1 is attached, and a trimmer 4 1 for cutting the continuous inner bead 2 cut by the cutting tool 5 into short pieces.
It consists of a pair of upper and lower rotating bits 9, 9' provided on the sides, and a belt 10 stretched between the roller 7 and the rotating bits 9, 9'.

Two cutting tools 9a are attached to the outer surface of one rotating tool 9 at opposing positions. Rotational movement of the roller 7 due to friction with the inner surface of the tube 1, which is caused by relatively moving the ERW tube 1 and the cutting device A in the tube axis direction of the ERW tube 1, is caused by the belt 10. The signal is transmitted to each of the rotating bits 9 and 9', causing them to rotate. The continuous inner bead 2 cut by the cutting tool 5 is inserted between a pair of upper and lower rotating tools 9 and 9'.
, 9', it is cut into short pieces of constant size.

In this invention, as described above, by relatively moving the ERW tube 1 and the cutting device A in the axial direction of the ERW tube 1, the inner bead 2 is continuously cut by the cutting tool 5. cut. The continuous inner bead 2 cut in this way is cut by a pair of upper and lower rotating bits 9, 9.
As the rotating bits 9 and 9 rotate, they are cut into short pieces of a fixed size, so that they can be easily discharged from the pipe.

[0015] In this invention, unlike conventional methods, the inner bead is not notched perpendicular to the tube axis using a notch roller, so the above-mentioned problems caused by the strength of the pressing force of the notch roller do not occur. . In addition, since a drive source such as a motor or cylinder is not required to drive the rotating cutting tool for shredding the cut inner bead, the device can be made smaller, lowering costs, and can be used with small-diameter electric power. Even in a sewn tube, the inner bead can be easily cut.

[0016]

[Effects of the Invention] As described above, according to the present invention,
The inner bead of the electric resistance welded pipe can be made without any notch defects or the like occurring on the inner surface of the pipe, and without the need for a special drive mechanism, etc.
The industrially useful effect of being able to efficiently and accurately shred into short pieces and remove them is brought about.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing one embodiment of the method of the invention.

FIG. 2 is a view taken along arrow a in FIG. 1;

FIG. 3 is a schematic front view of a conventional device.

[Explanation of symbols]

1 ERW pipe 2 Inner bead 3 External bead 4 Trimmer 5 Byte 6 Notch roller 7 Roller 8 bytes 9,9’ Rotating bite 10 Belt

Claims (1)

[Claims] 1. A trimmer inserted into the tube and equipped with a cutting tool for cutting an inner bead of the electric resistance welded tube; and a roller attached to the trimmer that rotatably contacts the inner surface of the tube. , for cutting the continuous inner bead cut by the cutting tool into short pieces,
a pair of upper and lower rotating tools provided on the trimmer, and the rotating tool and the roller for transmitting rotational motion of the roller due to friction between the inner surface of the tube and the rotating tool to the rotating tool to rotate the rotating tool; A device for cutting the inner bead of an electric resistance welded pipe, characterized by comprising a belt wrapped around the belt.