JPH1015793A - Pipe outside surface finishing method and finishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of uneven polishing by producing rolling friction biased to a plane intersecting perpendicularly to the shaft center of a pipe in a contact part between a rotating pipe and a supporting device, thereby giving the axial feed to the pipe to polish the outer surface. SOLUTION: As a rotating shaft of a rotating roller 12 is biased to the axial direction of a pipe 17, if the pipe 17 is rotated on the shaft center, rolling friction is produced to be biased to a plane intersecting perpendicularly to the shaft center of the pipe 17 in a contact part between the pipe 17 and the rotating roller 12, and the contact part is displaced spirally to feed the pipe 17 in the axial direction. Accordingly, if an operator just brings a belt sander 24 into contact with the pipe 17 and helds it as it is, rotation on its shaft center and the axial feed can be automatically given to the pipe 17 simultaneously with polishing so as to restrain the occurrence of uneven polishing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for finishing a metal surface, and more particularly to a method for polishing an outer surface of a long-axis pipe manufactured by rolling, drawing, drawing, extrusion, or the like. The present invention relates to a method and an apparatus for finishing an outer surface of a pipe for performing finishing.

[0002]

2. Description of the Related Art The outer surface of a long-axis tube manufactured by rolling, drawing, drawing, extrusion, or the like may have defects such as scratches and cracks in handling in such a case. ,
Defects are removed by performing finishing such as polishing the outer surface. Since such defects do not exist in large numbers and their positions are scattered, a method of partially polishing only a relevant portion using, for example, a belt sander instead of polishing the entire surface of the pipe is performed. Have been done.

In this case, for example, as shown in FIG. 4, a pipe 1 is placed on a gantry 2 capable of horizontally supporting the pipe 1 and fed in the axial direction while rotating the pipe 1 around its axis by hand.
In order to reduce the work load and prevent uneven polishing, the pipe 1
Is supported by being brought into contact with a rotating roller rotated by a driving source, and the rotating roller is rotated around the axis of the tube 1 to polish the tube.

[0004]

However, in the former method of finishing the outer surface, the work of giving the pipe 1 rotation about the axis and feeding in the axial direction is performed manually while polishing is performed. In addition to imposing an excessive burden on the user, there is a problem that uneven polishing is caused and the wall thickness of the tube is likely to be uneven.

Further, in the latter method of finishing the outer surface, when a certain portion is polished and then another portion is polished,
Since the tube 1 is constantly rotated by the rotating roller, its position is not known. For this reason, the drive source is once turned off to stop the rotation of the tube 1, and the polishing position is searched again while rotating the tube 1 manually. As a result, the work efficiency may be reduced.

The present invention has been made in view of the above circumstances, and has as its object to provide a method and an apparatus for finishing the outer surface of a pipe, which can reduce the work load due to manual work and prevent the occurrence of uneven polishing. Aim.

[0007]

According to the method of finishing the outer surface of a pipe according to the present invention, the pipe is rotatably supported around an axis by a supporting device, and the pipe is polished by the polishing means. The friction generated at the contact portion rotates the tube around the axis, and at the contact portion between the rotating tube and the supporting device, rolling friction in a direction oblique to a plane perpendicular to the axis of the tube is generated. Thus, the outer surface is polished by giving an axial feed to the tube.

The pipe finishing apparatus according to the present invention comprises a polishing means for polishing the pipe while applying a rotational force thereto, and a supporting apparatus for supporting the pipe rotatably around its axis. Comprises a pair of rotating rollers for supporting the tube between the respective outer peripheral surfaces, and the rotating shafts of these rotating rollers are provided obliquely to the axial direction of the supported tube. Things.

In the tube outer surface finishing apparatus of the present invention,
Since the rotation axis of the rotation roller provided in the support device is oblique to the axis of the supported tube, if the outer surface of the tube is polished by the polishing means, the axis generated by the polishing at the polished portion will be applied to the tube. A rotating force is applied around the pipe, whereby the pipe rotates around the axis, and at the contact portion between the outer surface of the pipe and the rotating roller, the rolling friction in a direction oblique to the plane perpendicular to the axis of the pipe. Therefore, an axial feed is given to the pipe, and the pipe can be fed in the axial direction while being rotated around the axis to perform the polishing.

The driving source for the axial feed applied to the tube is caused by the rolling friction generated at the contact portion between the rotating roller and the tube due to the rotation of the rotating roller. Is caused by the rolling friction generated at the contact portion between the pipe and the pipe rotating about the axis, so that the driving sources for the rotation about the pipe axis and the axial feed are both the polishing means and the pipe at the polishing point. Therefore, if the polishing means is separated from the outer surface of the tube, the rotation and the feed of the tube can be stopped, and the next polishing point can be easily confirmed.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. In FIG.
Is a supporting device. The supporting device 11 includes two rotating rollers 12, a roller fixing plate 13 for fixing the rotating rollers 12, and a supporting device for attaching the roller fixing plate 13 to which the rotating rollers 12 are fixed to a gantry 14. A mounting device 15 is provided, and the supporting device 11 is mounted on the gantry 14 via an engaging arm 16 provided on the supporting device mounting device 15 to support the pipe 17.

As shown in FIG. 2, the two rotating rollers 12 are separated from each other in a direction opposite to the rotation axis, and
Further, they are arranged so that their rotation axes are parallel to each other, and are fixed to the roller fixing plate 13. These rotating rollers 12
Since it is necessary to generate rolling friction at a contact portion with the pipe 17, for example,
Alternatively, the same material is provided on the outer peripheral surface of the rotating roller 12.

The support device mounting member 15 is composed of a bottom plate 18 on which the roller fixing plate 13 is mounted, and the engaging arms 16 provided at both ends thereof. Bottom plate 18
Are formed with a pair of floating holes 19 for fixing the roller fixing plate 13 so that the rotation axis of the rotation roller 12 can be obliquely oblique to the longitudinal direction of the bottom plate 18.

The engagement arms 1 provided at both ends of the bottom plate 18
Numeral 6 is adapted to removably engage with the fixed frame 20 provided on the gantry 14, whereby the adjacent 2
Since one of the fixing frames 20 can be freely selected and attached to the gantry 14, the installation interval between the support devices 11 can be adjusted according to the length of the pipe 17.

Roller fixing plate 1 to which rotating roller 12 is fixed
2, the rotating shaft of the rotating roller 12 is first inclined in the longitudinal direction of the supporting device mounting member 15, that is, in the axial direction when the tube 17 is supported. The roller fixing plate 13 is temporarily fixed to the supporting device mounting fixture 15 so that the roller fixing plate 13 can be crossed and the inclination angle at this time can be easily changed manually.

Next, if the tube 17 is arranged on the rotating roller 12 and the rotating roller 12 is manually rotated, the feed amount of the tube 17 can be confirmed, whereby the inclination angle of the rotating shaft is adjusted. To fix the roller fixing plate 13
Firmly to the bottom plate 18. In this manner, the roller fixing plate 13 is attached to the support device mounting member 15 such that the rotation axis of the fixed rotary roller 12 is oblique to the surface 21 orthogonal to the axis of the supported pipe 17. Then, the support device 11 is assembled.

The supporting device 11 having the above-described structure is used for the fixed frame 2.
0, a scatter prevention plate 22, and a gantry 14 including a water tank 23.
To support the tube 17. Fixed frame 20
Are mounted at equal intervals in the longitudinal direction of the gantry 14 while projecting from the gantry 14, and the installation interval of each of the fixed frames 20 is equal to the separation distance of each of the engagement arms 16 provided on the support device 11. Have been.

The scattering prevention plate 22 is provided on the rear side of the gantry 14 over its entire length in order to prevent the swarf that is scattered when the pipe 17 is polished from scattering around. In addition, the water tank 23 is provided to accommodate the polishing debris that has collided with the scattering prevention plate 22 and fall, and to prevent the stored polishing debris from scattering again into the atmosphere and being sucked by the worker. Thus, the working environment can be improved, and the cleaning work of the polishing debris can be facilitated.

The belt sander 24 is a hand-held type polishing means having an annular polishing belt 25 having a polishing surface on the outer peripheral side and a driving device (not shown) for rotating the polishing belt 25. The belt sander 24 is rotated by the driving device. The abrasive belt 25 is pressed against the outer surface of the tube 17, thereby
Is to polish the outer surface.

The support device 11 and the belt sander 2 having the above configuration
The finishing operation of the outer surface of the pipe 17 is carried out as follows using the finishing device consisting of 4. At least two or more of the support devices 11 assembled as described above are attached to the gantry 14 according to the length of the tubes 17 to support the tubes 17 on the support device 11. When the polishing location is confirmed and the belt sander 24 is pressed against the polishing location to start the polishing operation, a rotational force around the axis is applied to the pipe 17 by using the friction generated at the polishing location as a driving source. 17 starts to rotate around the axis.

At this time, the rotating shaft of the rotating roller 12 is
7 is oblique to the axial direction, when the pipe 17 rotates around the axis, the rolling friction occurs at the contact portion between the pipe 17 and the rotating roller 12, and friction occurs on the surface 21 orthogonal to the axis of the pipe 17. This occurs in an oblique direction, and the contact portion is displaced in a spiral shape as shown in FIG. 3, and the pipe 17 is fed in the axial direction.

Therefore, as in the conventional case, the pipe 17 is fed by hand while rotating the pipe 17 for polishing, or the pipe 1 is manually rotated.
The complexity of having to perform a plurality of operations such as moving the belt sander 24 in the axial direction and polishing while rotating the belt 7 at the same time is eliminated, and the operator brings the belt sander 24 into contact with the pipe 17 and Just by holding it, the rotation around the axis and the feed in the axial direction can be automatically given to the pipe 17 simultaneously with polishing.
The occurrence of uneven polishing can be suppressed, and the burden on the operator can be significantly reduced.

The driving source for feeding the pipe 17 in the axial direction is a rotating roller 1 that rotates with the rotating roller 12.
The rotation of the rotating roller 12 is caused by the rolling friction generated at the contact portion between the rotating roller 12 and the tube 17 rotating around the axis. Therefore, the driving sources for the rotation around the axis of the tube 17 and the feed in the axial direction are both caused by the friction between the belt sander 24 and the tube 17 at the polishing point,
Therefore, if the belt sander 24 is separated from the outer surface of the pipe 17, the rotation and the feed of the pipe 17 can be stopped.

Therefore, by raising and lowering the belt sander 24 (contact and non-contact with the outer surface of the pipe 17), the rotation and the stop of the feed of the pipe 17 can be controlled and the start can be controlled. Thus, the finishing work can be speeded up.

[0025]

As described above, the method and apparatus for finishing the outer surface of a pipe according to the present invention can polish the pipe by the polishing means and simultaneously feed the pipe in the axial direction. Automating operations such as providing rotation around the axis and feeding in the axial direction to the pipes that were being performed during the work greatly reduced the burden on workers, and uneven pipe thickness caused uneven pipe thickness. This has the effect of preventing the occurrence of such an event.

When the polishing means is separated from the outer surface of the pipe, the rotation and the feed of the pipe can be stopped. Therefore, when polishing at one location is finished and polishing at another location is performed, the polishing location must be checked. Can be easily performed, and the operation can be speeded up.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a pipe outer surface finishing method and a finishing apparatus according to the present invention.

FIG. 2 is a plan view showing a state in which a pipe is arranged on a support device constituting the finishing device.

FIG. 3 is an enlarged perspective view showing a state in which feed is applied to the pipe by the finishing device.

FIG. 4 is a perspective view showing a conventional method for finishing an outer surface of a pipe and a finishing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Support apparatus 12 Rotary roller 17 Tube 24 Belt sander (polishing means)

Claims (2)

[Claims] 1. A method of finishing an outer surface of a pipe in which the pipe is rotated about an axis and the outer surface is polished, wherein the pipe is rotatably supported about the axis by a supporting device, and the pipe is polished by a polishing means. The friction generated at the contact portion between the polishing means and the tube rotates the tube around the axis, and the rotating tube and the contact portion between the rotating device and the supporting device obliquely intersect with a plane perpendicular to the axis of the tube. A method of finishing an outer surface of a pipe, wherein the outer surface is polished by generating rolling friction in a direction in which the pipe is fed, thereby giving an axial feed to the pipe. 2. A polishing apparatus, comprising: polishing means for applying a rotational force to a pipe while polishing the pipe; and a supporting device for rotatably supporting the pipe around an axis. And a pair of rotary rollers for supporting the pipe, wherein the rotary shafts of the rotary rollers are provided obliquely with respect to the axial direction of the supported pipe.