JPS5847271B2 - Self-propelled bevel cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-propelled groove fusing machine suitable for bevel fusing the end face of a horizontally placed non-circular pipe, such as a square pipe with rounded corners.

Long steel pipes are used as building materials in recent building construction.

The cross-sectional shape of this steel pipe is often a non-circular pipe, for example, a square pipe with rounded corners.

There has been a desire for a self-propelled groove fusing machine that can perform groove fusing on the end face of such a long non-circular pipe while it is placed horizontally.

BACKGROUND ART Conventionally, there has been a groove fusing machine in which a fusing machine is rotatably mounted on a base that is held and fixed inside a pipe.

However, with this bevel fusing machine, it is difficult to hold and fix the base inside the pipe, it is difficult to handle a wide variety of pipe diameters with just one machine, and the running speed of the fusing machine for non-circular pipes has to be adjusted. It is difficult to make it constant, and there are problems in that it is difficult to obtain a uniform welded groove cross section, especially when the pipe is placed horizontally.

In view of these points, the present invention is lightweight, can be applied to pipes of different diameters with a single unit, and can uniformly bevel over the entire circumference of the end surface even for non-circular pipes placed horizontally, such as non-cornered pipes. The purpose of the present invention is to provide a self-propelled groove fusing machine capable of fusing processing, and to solve the problems of conventional groove fusing machines.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be explained based on the drawings.

The drawing shows one embodiment of the present invention, in which a processing machine main body 1 is assembled from a substrate 2 made of, for example, aluminum casting and a pair of frames 3 and 4 provided opposite to each other on the back surface of this substrate 2. ing.

A blower support arm 5 is protruded from the base plate 2, and a blower, for example, a crater burner 7, is supported on the arm 5 via a rotary holder 6.

This crater burner 7 connects the end surface 8a of the vibrator 8 to the third
As shown in the figure, it is held in an inclined position in order to carry out so-called bevel cutting of a pipe, which involves cutting a pipe on an inclined surface.

An opening 9 is formed in the substrate 2 located in front of the processing burner 7, and a flame blowout hole 10 is formed in the frame 4.

A motor 11 is also mounted on the substrate 2 as a drive source for rotationally driving rollers to be described later.

Around the opening 9 of the substrate 2, as shown in FIGS. 2 and 3, a traveling guide means is provided which contacts the end surface 8a of the pipe 8.

The traveling guide means is a means for regulating the movement of the processing machine main body along the end surface of the pipe, and in the illustrated example rollers 12, 12 are provided, but it may be a mere contact portion.

Further, one frame 3 has one inner roller 13 that rolls circumferentially on the inner circumferential surface of the pipe, and the other frame 4 has two outer rollers 14 that roll circumferentially on the outer circumferential surface of the pipe.
are provided respectively, and these roller groups 13.1
4, the processing machine main body 1 is configured to be movable in the circumferential direction along the pipe end surface 8a.

Further, one inner roller 13 is always opposed to the center between the two outer rollers 14, and the axis of the inner roller 13 is pressed perpendicularly to the plane containing each axis of the two outer rollers 14. It is configured to

One inner roller 13 may have rolling wheels 16 and 17 supported on both ends of a single support shaft 150 via bearings, or may have rolling wheels integrally provided without intervening bearings. good.

The support shaft 15 is configured to be able to slide vertically toward and away from the inner peripheral surface of the pipe 8 by an appropriate mechanism.

Further, a pressing operation tool 18 is supported on the frame 3, and the pressing operation tool 18 and the support shaft 15 are engaged with each other.

Rotate the pressing operation tool 18 to move the support shaft 15 to the pipe 8.
By moving relative to the inner peripheral surface, the wheels 16, 17
can be pressed against the inner peripheral surface of the pipe 8 or released from the pressure.

The pressure is released only when the processing machine main body 1 is removed from or attached to the pipe 8, and the pressed state is maintained during normal processing operation.

This pressing operation tool 18 is provided with a spring 19 so that the support shaft 15 is always urged against the inner circumferential surface of the pipe 8.

A brake 20 for controlling the running direction is provided on the wheel 16 on the side far from the pipe end surface 8a among the wheels 16 and 170.

A flame prevention disk 21 is attached to the side surface of the roller 17 on the side closer to the pipe end surface 8a.

The two outer rollers 14 are comprised of a pair of gears 23, 23, 24.degree. 24 fixed to both sides of two rotating shafts 22, 22 supported directly or indirectly on the frame 4.

Of both gears, the gear 23 closer to the pipe end surface 8a has a larger diameter than the other gear.

Further, a drive gear 25 is meshed with the gear 24 on the side far from the pipe end surface 8a.

The drive gear 25 is directly or indirectly supported on the frame 4 and is connected to the rotating shaft 11a of the motor 11 via a rotating chain 26.

Therefore, the two outer rollers 14 are rotationally driven by the motor 11.

The force is not limited to being transmitted from the drive source to the gears 23 and 24, but may be transmitted only by gears.

Further, the number or position of gears constituting the two outer rollers 14 can be changed as appropriate.

In the figure, 27 is an operation box for controlling the speed and rotational direction of the motor 11, 28 is a protection plate that protects the two outer rollers 14 from the flames of the crater burner 7, and 29 is a protection plate that protects one outer roller 13 from the flames. Both are made of stainless steel plate and asbestos plate.

Reference numeral 30 denotes a hand-held nodule for installing and removing the processing machine main body 1 from the workpiece vibrator 8.

In this configuration, one inner roller 13 is pressed against the inner circumferential surface of the pipe 8 using the pressing operation tool 18, and the motor 1
1 is rotated, the processing machine main body 1 begins to move in the circumferential direction along the pipe end surface 8a as the two outer rollers 14 rotate.

The moving speed at this time is proportional to the rotational speed of the two outer rollers 14, that is, the rotational speed of the motor 11.

Therefore, if the rotational speed of the motor 11 is kept constant, the moving speed of the processing machine main body 1 can be kept constant at any position on the pipe end surface 8a, regardless of the shape of the vibrator 8 to be processed.

In addition, two outer rollers 14 driven by the motor 11
is composed of a pair of gears 23 and 24, and
The gear 23 on the side closer to the pipe end surface 8a is the gear 24 on the far side
Since the diameter is larger, the circumferential speed of the gear 23 on the side closer to the pipe end surface is faster than that of the other gear 24 (as a result, the roller 12 as a travel guide means is always pressed against the pipe end surface 8a).

Therefore, the processing machine main body 1 moves at a constant speed along the pipe end surface 8a with the traveling guide means 12 in contact with the pipe end surface 8a.

In this case, since the processing machine body 1 is a self-propelled type that moves along the pipe end surface, the direction of the flame emitted from the crater burner 7 is perpendicular to the tangential direction of the pipe circumference at any position on the pipe end surface. ing.

Therefore, by the flame generated from the crater burner 7, the pipe end i8a is uniformly and favorably cut by welding the groove at any position in the circumferential direction.

In the above embodiment, the two outer rollers 14 are composed of a large-diameter gear 23 on the side close to the pipe end surface and a small-diameter gear 24 on the side far from the pipe end surface.

These two outer rollers 14 may have the function of moving the processing machine main body 1 along the pipe end face 8a and bringing the running guide means 12 into contact with the pipe end Wj 8a by their rotation, and therefore, substantially It has a width in the axial direction,
It is sufficient to change the roller diameter so that the roller diameter on the side closer to the pipe end face is larger than the roller diameter on the side far away.

Therefore, it is also possible to carry out the process using a single conical roller, as shown in FIG. 4, for example.

The number of gears and the gear configuration are not limited.

The gear may be anything that does not slip on the circumference of the pipe (it may also be a tire.

Note that in this case, a gear for transmitting driving force is separately provided on the shaft 22.

Further, in the embodiment, two outer rollers 14 are driven by a motor, but it goes without saying that one inner roller 13 may be driven.

In this case, the inner roller 13 is configured to have a width substantially in the axial direction like the outer roller 14 in the above embodiment, and the roller diameter on the side closer to the pipe end face is larger than the diameter of the roller on the side far away. Good too.

Similarly, the pressing operation tool 18 may be configured to press the outer roller 14 against the circumferential surface of the pipe or release the pressure, contrary to the embodiment.

Since the self-propelled groove fusing machine according to the present invention is configured as described above, it has the following effects.

■ It is not necessary to separately provide a base for rotating the rotary table as in the conventional rotary type bevel fusing machine (therefore, it is extremely lightweight and easy to handle.

■ Since it is a self-propelled type that moves along the end of the pipe, it is extremely versatile as it can be applied to many types of pipes regardless of the size and thickness of the vibrator being processed.

■ By keeping the rotational speed of the drive source constant, the moving speed of the processing machine body can be made constant at any position on the pipe end surface, regardless of the shape of the pipe.
Even for a workpiece vibrator having a shape other than a circle, such as a rectangular pipe with rounded corners, uniform groove cutting can be performed without producing an unfused portion.

■ The angle of the flame emitted from the fusing machine is always constant over the entire circumference of the end surface of the vibrator to be processed, so the angle is constant over the entire circumference of the pipe end surface, allowing for homogeneous groove fusing with no change in density. It can be performed.

■ One inner roller is always opposed to the center between the two outer rollers, and the axis of the inner roller is pressed perpendicularly to the plane that includes each axis of the two outer rollers. Therefore, the pressing force between the one inner roller and the two outer rollers that are pressed against the side of the pipe is almost constant, regardless of whether these rollers are located at the rounded corner or at the ascending or descending part of the straight section. It does not fluctuate and is suitable for groove cutting of the end face of non-circular pipes such as square pipes with rounded corners placed horizontally.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a schematic perspective view, FIG. 2 is a partially cutaway perspective view showing the arrangement and connection of each component, and FIG. 3 is a partially cutaway side view. , FIG. 4 is a perspective view showing another embodiment of the outer roller. DESCRIPTION OF SYMBOLS 1... Processing machine main body, 7... Fusing machine, 8... Vibrator to be processed, 8a... Pipe end surface, 11... Drive source, 1
2... Travel guide means, 13... Inner roller, 14.
... Outer roller, 18... Press operation tool.

Claims (1)

[Claims] 1 A fusing machine that performs a groove fusing process on the end face of the vibrator to be processed;
A traveling guide means that contacts the end surface of the pipe, two outer rollers that rotate in contact with the outer circumferential surface of the pipe, one inner roller that rotates in contact with the inner circumferential surface of the pipe, and either the outer roller or the inner roller. and a roller rotation and drive source linked to the outer roller or the inner roller, the inner roller being always opposed to the center between the two outer rollers,
The axis of the inner roller is pressed perpendicularly to the plane including each axis of the two outer rollers, and at least one of the outer rollers and the inner roller has an axial width and a width in the axial direction. A self-propelled bevel fusing cutting machine characterized in that the roller diameter changes and the roller diameter on the side closer to the end of the pipe is shaped like a dog.