JP2007296584A - Self-traveling beveling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-traveling beveling device which uniformly bevels even an elliptic pipe, and dispenses with centering work, by allowing the whole beveling machine to rotate around a pipe by frictional force of a plurality of rollers, with the plurality of rollers and a guide roller in an outer diameter in the pipe. <P>SOLUTION: The self-traveling beveling device 10 is arranged so that a housing 20, a gear box 30, the plurality of rollers 21 and 22 and the guide roller 24 mutually sandwich the pipe P. Since these rollers 21 and 22 and the guide roller 24 are wholly placed with a specific angle, the self-traveling beveling device 10 rotates without dropping from the pipe P by the frictional force. The self-traveling beveling device 10 rotates in the pipe by the guide roller 24, and has the function of automatically rotating a bevel gear 26 by using rotation of the roller 21, so that beveling is uniformly and easily performed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a groove processing apparatus, and particularly belongs to the technical field of a pipe processing apparatus.

  2. Description of the Related Art Portable groove processing apparatuses have been used to perform groove processing of pipes that cannot be rotated, such as various plants. This groove processing apparatus is attached to the outer side or the inner side of a processing portion of a pipe to be processed and performs groove processing of the pipe, and includes a fixed portion, a rotating body, and a cutting tool (cutting blade). The fixed portion is fixed to the outside or the inside of the pipe, and a rotating body that is rotatable is attached to the outer periphery or the end of the pipe.

  Usually, the rotating body is provided with a plurality of cutting tools (cutting blades) via a tool holder. The tool holder has a moving shaft that moves the tool (cutting blade) back and forth in the radial direction or axial direction of the pipe. By moving the moving shaft back and forth automatically or manually, the pipe end and inner diameter, groove, Outside diameter processing is performed.

  According to the conventional groove processing apparatus as described above, the trajectory of the cutting tool rotates with reference to the rotating body, so that each processing trajectory is drawn in a perfect circle. Therefore, it is necessary to accurately bring out the rotating core of the rotating body based on the outer diameter or inner diameter of the pipe before starting the processing. Also, when welding and joining with other pipes, it is necessary to accurately align the ends over the entire circumference, so there are many cases where groove processing is performed at an angle on each pipe end. It is also necessary to accurately put out the core of the rotating body in the falling direction. The centering work before the groove processing is very important, and even a highly skilled worker is careful to spend a long time.

  Furthermore, according to the conventional groove processing apparatus as described above, when performing groove processing of thin pipes, generally, there is a tendency to make an ellipse, but since the locus of the bite is a perfect circle, the groove processing is performed as it is. And the thickness of the processed end becomes non-uniform, which is the main cause of poor penetration during welding. In order to prevent this, the piping must be corrected to a perfect circle in advance. For the piping corrected to a perfect circle, the rotating core of the rotating body is accurately taken out based on the outer diameter or inner diameter of the pipe, and falls down. The core of the direction must also come out accurately.

  Also, in various plant constructions, it is necessary to perform groove processing of various diameters and various shapes, and it is not necessary to prepare a groove processing device that is attached to the outside or inside of the processing portion of the pipe that matches each processing object diameter. In addition, a large amount of equipment purchase costs and storage space are required.

Means for Solving the Invention

  The present invention includes a housing that can be rotated around a pipe that is an object to be processed, and a plurality of rollers on the inner and outer surfaces of the pipe to hold the housing, and the roller is rotated around the pipe. The housing includes a tool holder for holding a tool, the tool holder receives power from the roller, and the tool holder is arranged in the radial direction of the pipe even when the diameter of the pipe is different. Power transmission means for advancing and retreating at a constant speed in the axial direction is provided, the roller is provided with a guide roller on either the inner or outer surface of the pipe, the guide roller is rotated with respect to the inner or outer surface of the pipe, and By keeping the roller at a certain angle and supporting it with a roller following the end of the pipe, the groove processing locus is always kept constant even in an elliptical tube and between horizontal positions. Bets are the self-propelled beveling apparatus characterized by it, has solved the above problems.

The invention's effect

  Since the self-propelled groove processing device of the present invention can be rotated following the inner surface or the outer surface of the pipe by attaching a plurality of guide rollers to the inner surface or the outer surface of the pipe, the conventional groove processing This eliminates the need for centering work time like a machine, greatly shortens the work time, and eliminates the need for straightening an elliptical tube into a perfect circle. .

  In addition, when performing groove processing at an angle different from the pipe end, the support ring is attached to the rear portion of the housing according to the angle at which the groove processing is performed, and the imitation roller is in close contact with the support ring. .

  Furthermore, the self-propelled groove processing device of the present invention can rotate around the pipe by a plurality of rollers and a plurality of guide rollers, and can automatically move the tool holder forward and backward, thereby providing a stable cutting surface. It became possible to secure.

  Furthermore, since the self-propelled groove processing device of the present invention can adjust the feed amount of the tool holder without being constrained by the rotation of a plurality of drive rollers, it always opens with a constant bite feed amount when the pipe is circulated. Since it became possible to perform the tip processing, it became possible to perform the groove processing work of pipes with a wide range of diameters with a single machine.

Hereinafter, specific embodiments of a self-propelled groove processing apparatus according to the present invention will be described in detail with reference to the drawings. Drawing 1 is a front view (a) and a side view (b) of a self-propelled groove processing device concerning an embodiment.
The self-propelled groove processing apparatus 10 of the present invention includes a housing 20, a gear box 30, an arm 40, and a motor M. The housing 20 has a plurality of driven rollers 21 and a plurality of drives on the outside of the gear box. The rollers 22 are arranged so as to sandwich the pipe P therebetween. The gear box 30 and the arm 40 can be moved up and down with the groove 23 as a guide. When the feed bolt 50 is turned, the gear box 30 is brought into close contact with the inner surface of the pipe P by the screw 51 and the nut 52, and the plurality of guide rollers 24 are in contact with the inner surface of the pipe P. It is fixed to the pipe P. In FIG. 1, the guide roller 24 is illustrated on the inner surface side of the pipe P, but it is also possible to install a guide roller on the outer surface side of the pipe P.

  When the motor M is turned, the self-propelled groove processing device 10 starts to rotate around the pipe P by the frictional force of the plurality of driven rollers 21 and the plurality of driving rollers 22. In the case of FIG. 1, since the guide roller 24 is in contact with the inner surface side of the pipe P, the self-propelled groove processing device 10 starts to rotate following the inner surface of the pipe P.

  Further, the plurality of driven rollers 21 and the plurality of driving rollers 22 are all given a fixed angle, and the self-propelled groove processing device 10 is caused by the frictional force of the plurality of driven rollers 21 and the plurality of driving rollers 22. Since the force always acts in the direction of being drawn into the pipe P when the is rotating, it can be used in horizontal pipes and vertical pipes. In addition, since the force of the direction pulled with respect to the piping P is received with the some guide roller 25, uniform and reproducible rotational motion is attained.

  In FIG. 1, the self-propelled groove processing device 10 has a plurality of driven rollers 21 and a plurality of driving rollers 22 with a fixed angle, and a force is applied in a direction of being drawn into the pipe P. It is also possible to attach a support ring to the rear portion of the traveling groove processing apparatus 10 and rotate the pipe P around the support ring using the support ring as a guide.

  In FIG. 1, the code | symbol C shows a clutch. Although details will be described later, when the clutch C is in the neutral state, the bevel gear 26 does not rotate even when the self-propelled groove processing device 10 rotates around the pipe P. When the clutch C is put in the cutting feed direction, the bevel gear 26 starts to rotate. If a tool holder is attached to the bevel gear 26, the tool holder can be automatically fed in the radial direction or axial direction of the pipe P.

Next, a mechanism for rotating the bevel gear 26 when the clutch C is set to the cutting feed side will be described in detail with reference to FIGS.
FIG. 2 is a perspective view of the housing 20 as viewed from the lower side (the piping P side). The housing 20 includes a plurality of driven rollers 21, and rotates around the pipe P when the plurality of driven rollers 21 rotate. A rotation transmission gear 27 is connected to one of the plurality of driven rollers 21 by a key. That is, the rotation transmission gear 27 always performs the same rotational movement as the driven roller 21. An idle gear 28 is engaged with the rotation transmission gear 27, and a link mechanism 29 is formed on the opposite side of the idle gear 28. The link mechanism 29 is transmitted to the ratchet transmission mechanism 31 and rotates the small diameter transmission gear 32.

  That is, when the housing 20 starts rotating around the pipe P, the cutting feed gear group to the small diameter transmission gear 32 is always rotating.

  The small-diameter transmission gear 32 is configured such that a cutting feed transmission gear 33 is movable in the direction of the arrow on the axis of the cutting feed transmission shaft 34. The clutch C engages with the small-diameter transmission gear 32 and disengages the mesh. I can do it. That is, when the clutch C is put in the neutral side, the cutting feed transmission gear 33 is not meshed with the small diameter transmission gear 32 and the bevel gear 26 does not rotate. On the other hand, when the clutch C is put on the cutting feed side, the cutting feed transmission gear 33 is engaged with the small-diameter transmission gear 32, so that the bevel gear 26 starts rotating.

  Here, the link mechanism 29 will be described in detail with reference to FIG. FIG. 3 is a view from the (a) side in FIGS. 1 and 2, and only the idle gear 28, the link mechanism 29, and the ratchet transmission mechanism 31 are illustrated in FIG. 2.

  In FIG. 3, a cam feed adjusting plate 35 is connected to the idle gear 28. When the idle gear 28 rotates, the cam feed adjusting plate 35 starts rotating at the same speed. The cam feed adjusting plate 35 has a plurality of holes for changing the moving stroke of the link mechanism 29. A ratchet transmission mechanism 31 is connected to the opposite end of the link mechanism 28, and a ratchet transmission transmission gear 36 is built in the ratchet transmission mechanism 31. The ratchet transmission transmission gear 36 has a small diameter transmission gear. 32 is formed as an integral body. The ratchet feed transmission gear 36 is fixed by a taper pin 37 that is always pressed against the ratchet feed transmission gear 36 by a spring.

  When the idle gear 28 rotates, the cam feed adjusting plate 35 starts rotating at the same speed, and the link mechanism portion 29 is connected to one of a plurality of holes having different rotation center axes of the cam feed adjusting plate 35. Therefore, the rotational motion of the cam feed adjusting plate 35 is changed to the reciprocating motion of the link mechanism portion 29. The reciprocating motion of the link mechanism portion 29 converts the ratchet transmission mechanism portion 31 back into a reciprocating rotational motion. When the ratchet transmission mechanism portion 31 rotates, the taper pin 37 gets over a plurality of gears, and the reciprocating rotational motion occurs. Then, a plurality of ratchet feed transmission gears 36 are rotated.

  If the connecting position between the plurality of holes opened in the cam feed adjusting plate 35 and the link mechanism 29 is changed, the amount of reciprocating motion of the link mechanism 29 changes, so that the ratchet feed is transmitted for one rotation of the driven roller 21. The feed dog quantity of the gear 36 can be changed. That is, even when the diameters of the pipes P to be machined are different, it is possible to cope with the case where the feed amount of the cutting blade to be fed while the self-propelled groove machining apparatus 10 makes one revolution of the pipe P must be the same. It is.

  FIG. 4 shows the gear box 30 in FIG. 1 as viewed from the (b) side. A plurality of drive rollers 22 are arranged in the gear box 20, and a drive transmission gear 38 is firmly fixed to the plurality of drive rollers 22 with screws. Guide rollers 24 are coaxially installed on both sides of the plurality of drive rollers 22 and the drive transmission gear 38. Further, since the guide roller 24 is used as a copying guide, it is made of a material that does not expand and contract and has a diameter larger than that of the drive transmission gear 38.

  On the other hand, since the plurality of drive transmission rollers 22 need to rotate the self-propelled groove processing device 10 around the pipe P by friction force, the plurality of drive transmission rollers 22 are made of a material that expands and contracts, such as rubber. The diameter is larger than. That is, by rotating the feed bolt 50, when the gear box 20 is pressed against the inner surface of the pipe P via the arm 40, the driving roller 22 is crushed until it has the same diameter as the guide roller 24, thereby causing frictional force. And the self-propelled groove processing apparatus 10 can rotate while following the inner surface of the pipe P. Since the plurality of drive rollers 22, drive transmission gear 38, and guide roller 24 are all at a fixed angle, the self-propelled groove processing device 10 is always connected to the pipe P while the drive roller 22 is rotating. Power is working in the direction of being pulled against.

  In FIG. 4, the motor M is connected to the input shaft 41, and the rotation of the motor M is transmitted to the plurality of drive transmission gears 38 via the output gear 39.

  FIG. 5 shows a tool holder 60 installed in the self-propelled groove processing apparatus 10. FIG. 5A is a front view, and FIG. 5B is a side view. The rotation transmitted to the bevel gear 26 is transmitted to the cutting blade advance / retreat bevel gear 61 in the tool holder 60. The cutting blade advance / retreat bevel gear 61 is connected to the feed screw shaft 62 by a key. Further, a feed nut 64 is built in the radially moving tool holder 63.

  When the bevel gear 26 in the housing 20 rotates, the cutting blade advance / retreat bevel gear 61 rotates and the feed screw shaft 62 rotates. The cutting blade advancing / retreating bevel gear 61 and the feed screw shaft 62 are only rotated and are not moved. With the rotation of the feed screw shaft, the radially moving tool holder 63 moves forward and backward in the radial direction by a feed nut 64 incorporated therein. A cutting blade 65 is installed in the radial direction moving tool holder 63, and the cutting blade 65 performs the groove processing of the target pipe P by automatic feeding.

The self-propelled groove processing apparatus of this invention is shown, (a) is a front view, (b) is a side view. The perspective view which looked at the housing part of the apparatus of FIG. 1 from the piping P side The figure for demonstrating the automatic feed in the housing of FIG. Cross section of gearbox FIGS. 1A and 1B are a front view and a side view, respectively, illustrating a cutting blade automatic feed mechanism with a tool holder attached to the self-propelled groove processing apparatus of FIG. 1.

Explanation of symbols

10: Self-propelled groove processing device 20: Housing 21: Driven roller 22: Drive roller 23: Guide groove 24 for arm movement 24: Radial guide roller 25: Axial guide roller 26: Bevel gear 27: Rotation transmission gear 28: Play Gear 29: Link mechanism 30: Gear box 31: Ratchet transmission mechanism 32: Small diameter transmission gear 33: Cutting feed transmission gear 34: Cutting feed transmission shaft 35: Cam feed adjustment plate 36: Ratchet feed transmission gear 37: Tapered pin 38: Drive transmission gear 39: Output gear 40: Arm 41: Input shaft 50: Feed bolt 51: Feed screw 52: Nut 60: Tool holder 61: Bevel gear 62 for advancing and retracting the cutting blade 62: Feed screw shaft 63: Radially moving tool holder 64: Feed nut 65: Cutting blade (bite)
M: Motor C: Clutch

Claims (3)

  A housing that can be rotated around a pipe that is an object to be processed, and a plurality of rollers provided on the inner and outer surfaces of the pipe to hold the housing, and the rollers that allow the housing to rotate around the pipe. The housing includes a tool holder for holding a tool, the tool holder receiving power from the roller, and power transmitting means for moving the tool holder back and forth in the radial direction or axial direction of the pipe. A self-propelled groove processing device, characterized in that   Self-propelled that can always rotate the housing uniformly with respect to the reference surface by providing a guide roller on the inner or outer surface of the pipe on the roller and rotating the guide roller relative to the inner or outer surface of the pipe. This is a groove-type groove processing device, in which the plurality of rollers have a constant angle and are supported by a copying roller at the end of the pipe, so that the groove processing locus is always kept constant even in an elliptical tube and a horizontal tube. The self-propelled groove processing apparatus according to claim 1, wherein   The tool holder is provided with power transmission means for moving back and forth in the radial direction or axial direction of the pipe from the roller, but the speed at which the tool holder is moved back and forth can be kept constant even when the pipe diameter is different. The self-propelled groove processing apparatus according to any one of claims 1 and 2.

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