JPS6023101Y2 - Pipe diagonal fusing device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pipe diagonal fusing device for diagonally cutting and bevelling a large diameter steel pipe at a required angle.

When cutting a pipe perpendicular to the pipe axis using a gas cutting torch, it is sufficient to keep the torch stationary and rotate the pipe, but for bent pipes, it is better to cut the pipe perpendicularly to the pipe axis. When cutting diagonally at a certain angle or creating a bevel in the cut portion, it is necessary to move the torch itself laterally in accordance with the rotation of the tube, and furthermore, it is necessary to change the torch angle.

That is, if the cut is made at a cutting angle of 22.5 degrees as shown in FIG. 1a, this cut surface will be the root face of the welded joint.

Therefore, on the elliptical circumference of the cut, each point A, B, C9
The root face angle of D is the cutting angle 22 as shown in the figure.
．． It varies within a range of 5°.

By the way, in order to change the angle at each point, the cutting torch must always face the center E of the ellipse.

The present invention provides a device that satisfies the above conditions, and will be described below based on an embodiment shown in FIG. 2 and subsequent figures.

Reference numeral 1 denotes a movable trolley with rollers 2 provided on its back surface, and at its front end there is a side plate 5 supporting a guide plate 4 forming a guide edge 3 on which a magnetic rotating roller (to be described later) contacts and rolls. It is erected.

Reference numeral 6 denotes a universal arm consisting of, for example, arm members 6a, 6b, and 6c.A support shaft 8, which is erected on a support base 7 mounted and fixed on the cart 1, is inserted into the arm member 6c to support it. A universal arm 6 is constructed that extends and moves freely on a horizontal plane at a predetermined height.

Note that the universal arm 6 can be adjusted in the height direction.

The arm member 6a is branched into two upper and lower arms 9 and 10, and at the upper front end of the upper arm 9 is a magnet rotating roller 1 that rolls in contact with the guide edge 3 of the guide plate 4 described above.
1 is supported via a shaft 12, and a motor 13 for rotationally driving the shaft is further disposed.

An arm plate 15 is connected to the lower arm 10 with a pin 14, and a torch stand 17 for supporting a torch 16 is provided at the tip of the arm plate 15.

Reference numeral 18 denotes a center lever with one end fixed to the base of the arm plate 15, and the other end is provided with a long hole 19, into which a center pin 20 set directly below the center of the ellipse to be cut is loosely fitted. ing.

Reference numeral 21 denotes a support base having turning rollers 22, which supports the steel pipe 23 to be cut and rotates it at a predetermined speed.

Note that the steel pipe 23 is marked with a cutting line 24 in advance, and the torch 16 moves along this cutting line 24, and its power source is a magnet rotation driven by the motor 13 as described above. This is the roller 11.

In other words, the magnet rotating roller 11 reciprocates following the guide edge 3 of the guide plate 4, and this relationship allows the distance between the steel pipe 23 and the torch 16 to be kept constant.

Also, as described above, the center lever 18 is substantially integrated with the arm plate 15 that supports the torch stand 17;
Due to its relationship with the center pin 20 provided directly below the center of the ellipse to be cut, the torch 16 always faces the center of the ellipse and cuts at an angle in order to maintain the required cutting angle.

Note that the cutting speed must be determined in advance to correspond to the rotation of the turning jig 22, and for this purpose a cutting speed adjusting device and a changeover switch are provided to perform the folding operation of the magnetic rotating roller 11 according to the cutting angle. (not shown) etc. are provided.

The changeover switch may be operated by an operator, but consideration may be given, such as adding an automatic operation limit switch.

Further, when performing bevel processing on the root face, the operation is similar to the above-described operation, but in this case, it is necessary to change the angle at which the torch 16 is attached.

As described above, the present invention provides a magnet rotating roller 11 that is pivotally supported by the tip member 6a of the universal arm 6, receives the rotation of the motor 13, and rotates while abutting the guide edge 3 of the guide plate 4. Also, an arm plate 15 connected to the tip member 6a and having a torch stand 17 erected at its tip, and a center pin 20 set directly below the center of the ellipse into an elongated hole 19 integral with the arm plate 15 and provided at the tip. It is equipped with a center lever 18 that is loosely fitted, so that even though the torch stand moves back and forth, the distance between the torch and the tube is always maintained constant, and the torch is always maintained in its position toward the center of the ellipse to be cut. This ensures that the required cutting angle is maintained.

It is also possible to cut the groove, and it also has the advantage of being easy to handle.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing changes in root face angle, FIG. 2 is a perspective view showing an embodiment of the present invention, and FIG. 3 is a partial side view. 2 is a guide edge, 4 is a guide plate, 6 is a universal arm,
11 is a magnet rotating roller, 15 is an arm plate, 17 is a torch stand, 18 is a center lever, 19 is a long hole, 20
is the center pin.

Claims (1)

[Scope of utility model registration request] A universal arm consisting of a plurality of members rotatably supporting the base end and pivotally connected to each other, which is pivotally supported by the distal end member of the universal arm, transmits the rotation of the motor, and is in contact with the guide edge of the guide plate. a magnet rotating roller that rotates with A pipe diagonal fusing device characterized by comprising a center pin set directly below the center of the ellipse and loosely fitted into the elongated hole of the center lever.