JPH1133814A - Internal surface beads cutting device for electric resistance welded tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut away beads produced on the internal surface of an electric resistance welded tube, wherein the cut beads are fed smoothly to a bead cutting machine and cut into short lengths. SOLUTION: An internal beads cutting device is composed of a dolly 3 traveling in an electric resistance welded tube, a cutter 6 for cutting beads installed in a cutter holder 7 fixed to the machine frame upper part of the dolly 3, and a bead cutting machine 9 which cuts the beads 2 cut by the cutter 6 into shorter lengths. The bead cutting machine 9 is located right under the cutter holder 7, and two hydraulic cylinders for putting the cutter 6 into contact with the beads 2 on the pipe internal surface are positioned parallel perpendicularly to the pipe axial direction in such an arrangement that the rods of the cylinders contact with bearings at the two shaft ends of the lower roll 5, and the cylinders are actuated to lift the machine frame 3a, and thereby the cutter 6 attached to the holder 7 is brought into contact with the beads 2 so as to remove them.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting a bead formed on the inner surface of a welded portion of an electric resistance welded pipe during the production thereof, and for cutting the cut bead into a short length.

[0002]

2. Description of the Related Art In the production of an electric resistance welded tube, beads formed on the inner surface and outer surface of a welded portion must be cut and removed after welding. Of these, the beads generated on the inner surface of the pipe are usually cut by a blade of a cutting machine while inserting a bead cutting machine attached to the tip of a mandrel or the like into the pipe and moving the bead in the pipe axis direction.

FIG. 3 is a schematic sectional view of a conventional bead cutting machine. As shown in the drawings, the conventional bead cutting machine is mounted on a bogie 3 having an upper roll 4 and a lower roll 5 which abut on the inner surface of the electric resistance welded tube 1 and a blade holder 7 provided on an upper portion of the machine frame of the bogie 3. A bead cutting blade 6, a hydraulic cylinder 8 for pushing up the blade holder 7 and bringing the blade 6 into contact with the bead 2 generated on the inner surface of the electric resistance welded tube 1,
And a bead cutting machine 9 for cutting the cut beads into short lengths.

[0004] Two hydraulic cylinders 8 are provided in series in front of and behind the blade 6. A cylindrical guide 10 for guiding the bead 2 cut by the blade 6 to the bead cutting machine 9 is provided below the blade holder 7, and the bead 2 cut by the blade 6 has a cylindrical shape. It is guided to the bead cutting machine 9 through the guide 10.

The bead cutting machine 9 includes a fixed blade 11 and a movable blade 12 provided on the lower surface of the fixed blade 11 so as to be reciprocally movable by a hydraulic cylinder 13. Reference numeral 14 denotes a connecting member between the rod of the hydraulic cylinder 13 and the movable blade 12. The bead 2 guided to the bead cutting machine 9 has a fixed blade 11
And the moving blade 12 reciprocatingly moves and cut into short lengths,
It is discharged into the ERW tube 1.

[0006]

As described above, the bead 2 cut by the bead cutting blade 6 attached to the blade holder 7 is guided to a bead cutting machine 9 through a cylindrical guide 10. Although the bead 2 is cut into a short length by the cutting machine 9, when the bead 2 passes through the cylindrical guide 10, the traveling direction is not determined, and the bead 2 is clogged in the guide 10, and as a result, a problem that the cutting becomes impossible becomes impossible. Occurs.

The bead cutting machine 9 for cutting the cut bead 2 into a short length is provided below the machine frame of the bogie 3, so that the bogie 3 is installed on a line. Blade 11 and moving blade 12 of bead cutting machine 9
It is difficult to check the presence or absence of the blade chipping, and maintenance is not easy.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problem and, when cutting and removing a bead generated on the inner surface of an electric resistance welded tube, smoothly guide the cut bead to a bead cutting machine to cut the bead into a short length. An object of the present invention is to provide an internal bead cutting device for an electric resistance welded pipe that can be operated stably without being interrupted due to bead clogging or the like, and can be easily maintained.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a bogie that travels in a tube of an electric resistance welded pipe, a bead cutting blade attached to a blade holder fixed to an upper part of the machine frame of the bogie, and the bead cutting. A bead cutting machine for cutting a bead cut by a cutting tool into a short length, an bead cutting device for an inner surface of an electric resistance welded pipe, wherein the bead cutting machine is provided immediately below the blade holder, and The hydraulic cylinder for contacting the bead cutting blade with the bead on the inner surface of the electric resistance welded pipe is perpendicular to the pipe axis direction so that the cylinder rod abuts the bearings at both ends of the shaft that connects the lower roll to each other. The hydraulic cylinders are actuated to lift the machine frame of the bogie so that the machine tool is fixed to the tool holder fixed to the machine frame. A bead cutting tool that has been attached,
The inner bead of the electric resistance welded tube is brought into contact with the bead, and the bead is removed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a bead cutting device for an inner surface of an electric resistance welded pipe according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic sectional view of the apparatus of the present invention, and FIG.
3 is a sectional view taken along line AA of FIG. As shown in the drawing, the inner bead cutting device of the present invention also includes a bogie 3 having an upper roll 4 and a lower roll 5 which abut on the inner surface of the electric resistance welded tube 1,
A blade holder 7 provided above the machine frame 3a of the carriage 3,
A bead cutting blade 6 attached to a blade holder 7;
It comprises a bead cutting machine 9 for cutting a cut bead into a short length, as in the conventional apparatus.

In the apparatus of the present invention, a blade holder 7 to which a bead cutting blade 6 is attached is fixed to the machine frame 3a of the bogie 3. Two hydraulic cylinders 8, 8 for contacting the bead cutting blade 6 with the inner bead 2 of the electric resistance welded pipe 1 are provided downward in parallel at right angles to the pipe axis direction. 8a is in contact with bearings 16, 16 provided at both ends of a shaft 15 connecting the lower rolls 5, 5 to each other.

By operating the hydraulic cylinders 8, 8, the machine frame 3a of the carriage 3 is lifted, and the bead cutting blade 6 attached to the blade holder 7 fixed to the machine frame 3a is moved to the ERW pipe 1. Contact the inner bead 2 of the
, The inner bead 2 is cut and removed.

The bead 2 cut by the bead cutting blade 6
The bead cutting machine 9 for cutting into short lengths has a fixed blade 11
And a movable blade 12 located on the lower surface of the fixed blade 11. The movable blade 12 is a rod 13a of a hydraulic cylinder 13.
Are connected to each other by a connector 14 and can be reciprocated by the operation of the hydraulic cylinder 13.

The bead cutting machine 9 having such a structure is disposed immediately below the blade holder 7. Therefore, there is no need to provide a cylindrical guide for guiding the cut bead 2 to the bead cutting machine 9 as in the related art.

Next, the operation of the device of the present invention will be described. The device of the present invention is attached to the tip of a mandrel or the like and inserted into the ERW tube 1. The hydraulic cylinders 8, 8 are operated to raise the machine frame 3a of the bogie 3, and the bead cutting blade 6 attached to the blade holder 7 fixed to the machine frame 3a is moved to the inner surface of the welded portion of the electric resistance welded tube 1. Is brought into contact with the bead 2 formed in the above.

Next, the bead 2 is cut by the bead cutting blade 6 attached to the blade holder 7 by moving the apparatus in the pipe axis direction. The cut bead 2 is immediately cut into a short length by a bead cutting machine 9 disposed immediately below the blade holder 7, falls into the ERW pipe 1, and flows backward together with the ERW pipe 1.

Inspection of the fixed blade 11 and the movable blade 12 of the bead cutting machine 9 for the presence / absence of chipping can be performed by removing the blade holder 7, and maintenance is easy.

[0018]

As described above, according to the apparatus of the present invention, when cutting and removing the bead generated on the inner surface of the electric resistance welded pipe, the cut bead is smoothly guided to the bead cutting machine to shorten the bead. Industrially useful effects such as cutting can be performed, operation is not interrupted due to bead clogging, etc., stable operation is possible, and maintenance is easy.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of the apparatus of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ERW pipe 2 Bead 3 Cartridge 4 Upper roll 5 Lower roll 6 Blade 7 Blade holder 8 Hydraulic cylinder 9 Bead cutting machine 10 Tubular guide 11 Fixed blade 12 Moving blade 13 Cylinder 14 Connecting tool 15 Shaft 16 Bearing

Claims (1)

[Claims] 1. A bogie that runs in an ERW tube, a bead cutting blade attached to a blade holder fixed to an upper part of a machine frame of the bogie, and a bead cut by the bead cutting blade. An internal bead cutting device for an electric resistance welded pipe comprising a bead cutting machine for cutting into a short length, wherein the bead cutting machine is provided immediately below the blade holder, and the bead cutting blade is inserted into the electric resistance welded tube. The hydraulic cylinder for contacting the bead on the surface is provided at right angles to the tube axis direction such that the cylinder rod abuts bearings at both ends of the shaft interconnecting the lower roll.
Are arranged side by side in a downward direction, by operating the hydraulic cylinder and lifting the machine frame of the bogie,
The bead cutting blade attached to the blade holder fixed to the machine frame is brought into contact with the inner surface bead of the ERW tube, and the bead is removed therefrom. Cutting equipment.