JP2010110775A - Thermal cutting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermal cutting apparatus capable of maintaining machining quality by suppressing vibration of a pipe supporting part inside a cutting unit and capable of increasing machining accuracy by preventing a positional shift in feeding movement for repositioning. <P>SOLUTION: The thermal cutting apparatus includes: a cutting unit 10 that has a thermal cutting head 12 and a pipe feeding mechanism 16; a pipe supporting base 50 that is arranged in a rear part in the pipe feeding direction of the cutting unit and that supports the rear end of a pipe extending outside the cutting unit; a hose 150 that is inserted from the rear end of the pipe into the pipe supported by the pipe supporting base; a cooling medium supplying head 100 that is attached to the tip end of the hose, that blocks passing of the thermal cutting beam emitted from the machining head, by being inserted inside the cutting part of the pipe cut by the thermal cutting head, and that supplies a cooling medium into the pipe; and a hose moving device 60 that delivers and withdraws the hose for the purpose of making the position of the cooling medium supplying head correspond to the position of the thermal cutting head. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a thermal cutting apparatus for cutting a round pipe or a square pipe by irradiating a peripheral wall with a thermal cutting beam (mainly a laser beam) from the outside of the pipe.

For example, when cutting a metal pipe with this type of thermal cutting processing apparatus, the processing is performed by moving the processing head or rotating the pipe. In addition, in this type of apparatus, the quality deteriorates when spatter adheres to the inside of the pipe during processing, and the processing accuracy becomes poor when the influence of thermal expansion during processing increases. Supplying a cooling medium (air or water) for cooling the inside of the machining location is performed (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 9-155584

  By the way, when processing a long pipe from the front end to the rear end, the pipe is sequentially fed and moved to the cutting unit, but the rear end side of the long pipe is behind the cutting unit. If the pipe extends and hangs down, the supporting part of the pipe in the cutting unit may shake when the pipe rotates, resulting in poor processing quality, or misalignment when the pipe is moved and repositioned. As a result, there is a problem that the machining accuracy is lowered.

  In consideration of the above circumstances, the present invention can maintain the processing quality by suppressing the swinging of the support portion of the pipe in the cutting unit even when processing a long pipe, and can re-feed and move it again. It is an object of the present invention to provide a thermal cutting apparatus capable of preventing a positional shift when positioning and improving processing accuracy.

  The thermal cutting device of the invention of claim 1 is a thermal cutting head for cutting a pipe by irradiating a peripheral wall with a thermal cutting beam from the outside of the pipe, and by moving the pipe toward the front end direction, A cutting unit having a pipe feeding mechanism for positioning a cutting position of the pipe with respect to the thermal cutting head, and a rear end side of the pipe that is disposed behind the cutting unit in the pipe feeding direction and extends out of the cutting unit A pipe support that supports the pipe, a hose that is inserted into the pipe supported by the pipe support from the rear end of the pipe, and a pipe that is attached to the tip of the hose and is cut by the thermal cutting head A cooling medium that shields the passage of the thermal cutting beam irradiated from the processing head and supplies the cooling medium to the inside of the pipe by being inserted inside the location A supply head, is characterized by comprising a hose moving device or retraction or pay-out of the hose so as to correspond to the position of the position of the cooling medium supply head the thermal cutting head.

  Invention of Claim 2 is the thermal cutting apparatus of Claim 1, Comprising: The said pipe support stand from the pipe support cylinder which accommodates the said pipe, and the mount with a caster which supports this pipe support cylinder The pipe support cylinder is formed in a telescopic structure in which a plurality of cylinders are slidably combined in a slidable manner, and a frame with the casters is provided for each cylinder. Is characterized in that it can be stretched.

  A third aspect of the present invention is the thermal cutting apparatus according to the second aspect, wherein the pipe support is used on the extension line of the pipe extending rearward from the cutting unit, and on the side off the extension line. It is characterized by being provided so as to be movable between the retracted positions of the two.

  A fourth aspect of the present invention is the thermal cutting apparatus according to the second or third aspect, wherein the pipe support tube is a U-shaped hook member having an upper surface opened and an opening / closing operation for closing the upper surface opening of the hook member. It is characterized by comprising a free cover.

  The invention of claim 5 is the thermal cutting apparatus according to claim 4, wherein the pipe is received by a substantially arc-shaped curved inner surface at an appropriate position in the longitudinal direction inside the flange member. A pipe receiving member made of metal is provided.

  Invention of Claim 6 is the thermal cutting apparatus of any one of Claims 2-5, Comprising: The suction path connected to a dust collector is connected to the rear end of the said pipe support cylinder, A fluid inside the pipe can be sucked from the rear end of the pipe.

  A seventh aspect of the present invention is the thermal cutting apparatus according to the sixth aspect, wherein the dust collecting device is provided in the cutting unit so as to be able to suck dust generated during the cutting process. A suction passage connected to the apparatus extends to the rear end of the pipe support tube and is connected to the rear end of the pipe support tube.

  The invention according to claim 8 is the thermal cutting apparatus according to claim 6 or 7, wherein the suction passage has a telescopic structure in which a plurality of cylinders are slidably combined in a slidable manner like the pipe support cylinder. Each of the cylinders is provided with a platform with casters, and by using these casters, the overall length can be expanded and contracted, and it is provided to be movable to a side retreat position. It is a feature.

  According to the first aspect of the present invention, the rear end side of the pipe to be cut can be supported by the pipe support, so that even when processing a long pipe, the pipe in the cutting unit The support can be stabilized, and the displacement of the pipe during the repositioning can be prevented. In addition, a hose is inserted from the rear end of the pipe, and the cooling medium supply head attached to the tip of the hose is moved in accordance with the cutting processing position, so even when processing a long pipe Therefore, the cooling medium can be efficiently supplied to only the necessary portions without waste. Moreover, since the cooling medium supply head can be moved in accordance with the position of the thermal cutting head, it is possible to shield the beam irradiated from the thermal cutting head from reaching the opposite pipe wall, and to prevent spatter scattering. Can be prevented. Therefore, the processing accuracy can be improved and the processing quality can be improved.

  According to the second aspect of the present invention, since the pipe support cylinder that accommodates the pipe is formed in a telescopic structure, the length of the pipe support cylinder can be adjusted in accordance with the entire length of the pipe that is the workpiece.

  According to the third aspect of the present invention, the pipe support base can be kept in the retracted position when not required, so that it does not interfere with other operations.

  According to the invention of claim 4, since the pipe can be inserted into the U-shaped flange member from above, the work setting operation can be facilitated. If the cover is made of a transparent material, the current length of the pipe can be confirmed simply by looking through the cover from above.

  According to invention of Claim 5, since a pipe is supported by the resin-made pipe receiving members installed in the inside of a collar member, friction resistance can be decreased and a pipe can be sent smoothly. In addition, since the pipe is received by the substantially arc-shaped curved inner surface of the pipe receiving member, the pipe can be stably supported so that it does not run out, whether it is a square pipe or a round pipe, and the size is different. Even in this case, the pipe can be stably supported.

  According to the sixth aspect of the present invention, the internal fluid can be sucked from the rear end of the pipe, so that dust generated during processing together with the fluid can be collected through the pipe.

  According to the invention of claim 7, since the dust collecting device of the cutting unit can be used as it is for suction inside the pipe, no extra equipment is required.

  According to the invention of claim 8, the suction passage is formed in a telescopic structure, and the entire length of each cylindrical body can be expanded and contracted by a caster, so that space saving can be realized. In addition, each cylinder is provided with a base with casters, and by using these casters, the overall length can be expanded and contracted, and it is possible to move to the side retreat position. The suction passage moves with this pipe support when moving. Therefore, the work burden when the suction passage is moved to the retracted position when unnecessary is reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is an overall side view of the thermal cutting apparatus of the embodiment, FIG. 2 is an overall plan view thereof, FIG. 3 is an explanatory view of the moving direction of the thermal cutting head with respect to a square pipe as a workpiece, (B) is a side view of the pipe and the thermal cutting head, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1, and FIG. 5 is a configuration diagram of the cooling medium supply head. ) Is a plan view, FIG. 6B is a side view, and FIG. 6 is a sectional view seen from the front showing the relationship between the thermal cutting head, the pipe, and the cooling medium supply head.

  As shown in FIGS. 1 and 2, the thermal cutting apparatus includes a cutting unit 10 that cuts a square pipe (work) W in a horizontal posture by irradiation with a laser beam (thermal cutting beam), and a work of the cutting unit 10. A pipe support 50 arranged at the rear in the feed direction, a flexible hose 150 having a flexible double pipe structure for supplying refrigerant inserted into the pipe W, and the hose 150 is drawn out and pulled back. It consists of a hose moving device 60 and the like.

  The cutting unit 10 clamps the thermal cutting head 12 for cutting the pipe W by irradiating the peripheral wall from the outside of the pipe W with the thermal cutting beam and the front end side of the pipe W to be processed, and rotates the index as necessary. A pipe that positions the cutting portion of the pipe W with respect to the thermal cutting head 12 by feeding and moving the front end of the pipe W forward (in the direction of arrow A) via the clamp / index mechanism 14 and the clamp / index mechanism 14 A feeding mechanism 16 and a dust collecting device 20 for sucking dust generated during the cutting process are provided.

  As shown in FIG. 3, the thermal cutting head 12 includes an X-axis direction along the longitudinal direction of a pipe W that is a workpiece, a Y-axis direction orthogonal to the X-axis direction in a horizontal plane, and a Z-axis that is a vertical direction. The movement is controlled in the directions, and the pipe W is cut by the movement control in these directions.

  The pipe support base 50 is disposed behind the cutting unit 10 in the pipe feeding direction (arrow A direction) and supports the rear end side of the pipe W extending outside the cutting unit 10. The hose 150 is a pipe support base. The pipe W is inserted into the pipe W supported by 50 from the rear end.

  A cooling medium supply head 100 is attached to the tip of the hose 150. The cooling medium supply head 100 is inserted inside the cutting position of the pipe W by the thermal cutting head 12 so as to shield the passage of the thermal cutting beam irradiated from the thermal cutting head 12 and It fulfills the function of supplying a cooling medium inside. A hose moving device 60 is provided at the rear end of the pipe support 50 to feed and retract the hose 150 so that the position of the cooling medium supply head 100 corresponds to the position of the thermal cutting head 12.

  The pipe support base 50 includes a pipe support cylinder 52 that accommodates the pipe W, and casters 71, 72, 73, 75 with casters that support the pipe support cylinder 52, and the hose moving device 60 is a caster at the rear end. It is mounted on the attached gantry 75. The hose moving device 60 includes a drum 62 around which the hose 150 is wound, a pinch roller 64 that feeds and retracts the hose 150, and a drive that drives the drum 62 and the pinch roller 64 to synchronize with the thermal cutting head 12. And a motor 66.

  The pipe support cylinder 52 is formed in a telescopic structure in which a plurality of cylinders 52A, 52C, and 52C are slidably combined in a nesting manner, and each of the cylinders 52A, 52C, and 52C has pedestals 71, 72, 73, 75 is provided, and by using these casters 78, the entire length can be expanded and contracted.

  Further, the pipe support base 50 can be expanded and contracted by the telescopic structure, and as shown in FIG. 2, the whole including the bases 71, 72, 73 and 75 extends rearward from the cutting unit 10. The pipe W is provided so as to be movable between a use position P1 on the extension line of the pipe W and a side retraction position P2 off the extension line. In this case, a hinge 59 is provided between the frame 71 of the foremost cylinder 52A and the frame of the cutting unit 10, and the pipe support 50 is moved 90 degrees on the floor surface with the hinge 59 as a fulcrum. By rotating it about, it can move between the use position P1 and the retracted position P2. When the pipe support 50 is positioned at the use position P1, the front end of the foremost cylindrical body 52A is airtightly connected to the duct portion on the cutting unit 10 side via the seal portion S.

  As shown in FIG. 4, the pipe support cylinder 52 includes a U-shaped flange member 41 whose upper surface is open, and an openable / closable transparent cover 42 that closes the upper surface opening of the flange member 41. The hinge 43 is connected to the side wall of the flange member 41.

  In addition, a substantially U-shaped resin pipe receiving member 56 that receives the pipe W with an arc-shaped curved inner surface is provided at an appropriate position in the longitudinal direction inside the flange member 41.

  In addition, a suction passage 54 for collecting dust is provided below the pipe support cylinder 52. Similarly to the pipe support cylinder 52, the suction passage 54 is also configured to have a telescopic structure in which a plurality of pipes 54A, 54B, and 54C are slidably combined, and is combined with the cylinders 52A, 52B, and 53B to form each frame 71, 72, 73, 75. That is, each of the cylinders (each pipe) 54A, 54B, 54C is provided with each of the pedestals 71, 72, 73, 75 with casters, and by using these casters 78, the full length of the suction passage 54 can be expanded and contracted. In addition, the suction passage 54 can be moved to a side retracted position.

  The front end of the suction passage 54 is connected to the suction duct of the dust collector 20 of the cutting unit 10, and the rear end is connected to the rear end of the support cylinder 52. Therefore, the fluid in the pipe support cylinder 52 can be drawn into the dust collector 20 in the cutting unit 10 through the suction passage 54.

  Next, a cooling device 500 for thermal cutting processing that includes the cooling medium supply head 100, the cooling medium hose 150, and the hose moving device 60 will be described.

  First, when the cooling medium supply head 100 cuts the pipe W by irradiating the thermal cutting beam from the outside toward the peripheral wall of the pipe W from the thermal cutting head 12, the cooling medium supply head 100 is inserted into the pipe W, and the pipe W The cooling medium supply head 100 of this embodiment is configured as shown in FIG.

  That is, the cooling medium supply head 100 includes a head main body 100A having a cross-sectional shape corresponding to the inner peripheral shape of the pipe W, a cooling medium spray nozzle 120 provided on the outer peripheral portion of the head main body 100A, and the head main body 100A. The head body 100 </ b> A is rotated with respect to the tip of an external hose (cooling medium supply pipe) 150 provided at the inlet of the internal passage 110 and the internal passage 110. And a rotary joint 106 that is freely connected.

  A coupler 108 is provided between the rotary joint 106 and the tip of the hose 150 to release the connection in the event of an abnormality. The coupler 108 functions to prevent the cooling medium supply head 100 from being damaged by disconnecting the connection when an excessive force is applied due to being caught by interference such as scrap.

  The head body 100A is provided with a plurality of rollers 130 as guide members for reducing the sliding resistance of the head body 100A with respect to the inner wall of the pipe W. These rollers 130 roll in contact with the inner wall of the pipe W, and are provided so as to be able to contact the inner wall of the pipe W with play even if the size of the pipe W changes. It is arranged in a balanced manner on the top, bottom, left and right.

  In the head main body 100A, the front portion 102 is a portion where the injection nozzle 120 is formed, and the rear portion 104 is a portion where the roller 130 is provided. An inlet is provided, and the inlet is connected to the tip of the hose 150 via the rotary joint 106. In addition, the front end of the internal passage 110 is closed by a plug member 112. And the front-end | tip of many branch channel | paths 114 branched from the internal channel | path 110 is opening in the outer peripheral surface of the head main body 100A as the injection nozzle 120. FIG.

  In this case, the branch passage 114 is provided with an angle (for example, an inclination of 45 degrees) so that the cooling medium that has passed through the branch passage 114 is jetted obliquely backward from the jet nozzle 120.

  The position of the head main body 100 </ b> A is controlled so that the front portion 102 is located just inside the thermal cutting head 12 when being processed by the thermal cutting head 12. Therefore, as shown in FIG. 6, in order to increase protection against heat, the front portion 102 of the head main body 100A is formed in an X-shaped cross section as shown in FIG.

  That is, the front portion 102 of the head body 100A has a square shape that can be inserted into the square pipe W to be processed, and has a substantially X-shaped cross section having recesses 102a in portions corresponding to the four sides of the square pipe. It is formed into a shape.

  By making the front portion 102 of the head main body 100A have such a cross-sectional shape, it is possible to prevent the spatter from being scattered on the inner surface of the pipe W during the cutting process. Further, since the recess 102a is provided, a distance between the surface of the head main body 100A and a processing point by the beam can be increased, so that consumption of the head main body 100A can be reduced.

  The head body 100A is made of a porous carbon material having an infinite number of mesh paths. By using the carbon head main body 100A in this way, heat resistance can be improved, and the cooling medium supplied to the internal passage 110 can be oozed out to the outer surface through an infinite number of reticulated paths. It can cool itself and protect against heat during processing.

  Further, in the present embodiment, air and water are separately sent as cooling media by the hose 150 having a double tube structure, and the mixed mist 200 (cooling medium) of air and water is jetted at the jetting stage.

  Next, the operation will be described.

  When cutting the pipe W, the front end portion of the pipe W is clamped by the clamp / index mechanism 14 in the cutting unit 10, and the feed mechanism 16 is controlled to position the pipe W relative to the thermal cutting head 12. Further, the rear end side of the pipe W is received by the pipe support 50 set at the use position. That is, the cover 42 constituting the pipe support cylinder 52 is opened, the pipe W is inserted into the flange member 41 from above, and the pipe W is received by the pipe receiving member 56. After inserting the pipe W, the cover 42 is closed, and the pipe support cylinder 52 is substantially sealed.

  In this state, the pipe W is cut by the thermal cutting head 12. In the meantime, the cooling medium (air and water) is supplied to the cooling medium supply head 100 through the hose 150, and the cooling medium is injected into the pipe W from the injection nozzle 120 of the cooling medium supply head 100. The position of the cooling medium supply head 100 is adjusted by unwinding or pulling back the hose 150 and is synchronized with the position of the thermal cutting head 12.

  In this way, the processing proceeds while supplying the cooling medium, and at the same time, the dust collecting device 20 is driven, and the internal fluid is sucked from the rear end of the pipe support cylinder 52 through the suction passage 54. Then, dust, scrap, etc. generated by the processing together with the cooling medium supplied into the pipe W are collected and taken into the dust collector 20.

  For example, when cutting the pipe W, the clamp / index mechanism 14 is operated to rotate the pipe W. At this time, the cooling medium supply head 100 rotates together with the rotation of the pipe W, but the hose 150 does not rotate due to the rotary joint 106. Therefore, the cooling medium (air and water) can be smoothly sent to the cooling medium supply head 100 through the hose 150 at all times regardless of the rotation of the cooling medium supply head 100.

  When processing of a certain length is finished, the clamp / index mechanism 14 is released with the clamp released, and a new portion of the pipe W is re-clamped, and the pipe W is moved by a certain length by the feed mechanism 16. Send it out. Then, the next processing is performed in the same manner.

  As described above, in the thermal cutting apparatus according to the present embodiment, the rear end side of the pipe W to be cut can be supported by the pipe support base 50, and therefore, when the long pipe W is processed. In addition, the support of the pipe W in the cutting unit 10 can be stabilized, and the deflection of the processed portion of the pipe W and the displacement of the pipe W during repositioning can be prevented.

  In addition, the hose 150 is inserted from the rear end of the pipe W, and the cooling medium supply head 100 attached to the tip of the hose 150 is moved according to the cutting processing position. Even in this case, it is possible to efficiently supply the cooling medium (indicated by reference numeral 200 in FIG. 5) without waste to only the necessary portions. Further, since the cooling medium supply head 100 can be moved in accordance with the position of the thermal cutting head 100, the beam irradiated from the thermal cutting head 12 can be blocked from reaching the opposite pipe wall, Spatter scattering can be prevented. Therefore, it is possible to improve machining accuracy and improve machining quality.

  In the thermal cutting apparatus of this embodiment, the pipe support cylinder 50 that accommodates the pipe W is formed in a telescopic structure, so the length of the pipe support cylinder 52 is adjusted in accordance with the entire length of the pipe W that is a workpiece. it can. Further, since the pipe support base 50 can be kept at the retracted position when not required, it does not interfere with other operations.

  Further, since the pipe W can be inserted into the U-shaped flange member 41 from above, the work setting operation can be facilitated. Further, since the cover 42 is made of a transparent material, the current length of the pipe W can be confirmed simply by looking through the cover 42 from above. Further, since the pipe W is supported by the resin pipe receiving member 56 installed inside the flange member 41, the frictional resistance can be reduced and the pipe W can be smoothly fed. In particular, since the pipe W is received by the substantially arc-shaped curved inner surface of the pipe receiving member 56, it is possible to stably support the pipe W so that it does not sway regardless of whether it is a square pipe or a round pipe. Even if the sizes are different, the pipe W can be stably supported.

  Moreover, in the thermal cutting processing apparatus of this embodiment, since the internal cooling fluid is sucked from the rear end of the pipe W, dust generated during processing together with the cooling medium can be collected through the inside of the pipe W. it can. In particular, since the dust collecting device 20 of the cutting unit 10 is used as it is for suction inside the pipe, unnecessary equipment can be eliminated.

  In the thermal cutting apparatus of this embodiment, the head body 100A of the cooling medium supply head 100 is connected to the hose (external cooling medium supply pipe) 150 via the rotary joint 106. Even when W is rotated, only the cooling medium supply head 100 can be rotated following the rotation of the pipe W while the hose 150 is not rotated. Therefore, when processing the square pipe, the cooling medium supply head 100 having an appropriate size according to the size of the square pipe can be used, and the processing quality can be improved.

  Then, the cooling medium supplied through the rotary joint 16 is injected from the injection nozzle 120 into the pipe W through the internal passage 110, thereby cooling the inside of the pipe P and preventing spatter adhesion and dust scattering. can do. In particular, since the cooling medium is sprayed obliquely backward, it is possible to prevent the cooling medium from directly hitting the position where the thermal cutting beam is irradiated, and since the mixed mist of air and water is injected as the cooling medium, the efficiency is improved. A good cooling effect can be obtained.

  Further, since the roller 130 is provided on the head body 100A of the cooling medium supply head 100 as a guide member for reducing the sliding resistance of the head body 100A with respect to the inner wall of the pipe W, the cooling is performed via the flexible hose 150. Even when the medium supply head 100 is pushed and moved, the cooling medium supply head 100 can be smoothly moved in the pipe W. In particular, since the plurality of rollers 130 are provided as guide members, the cooling medium supply head 100 can be smoothly moved in the pipe P with a small resistance due to rolling.

  Further, in the thermal cutting apparatus of the present embodiment, the cross-sectional shape of the front portion 102 of the head body 100A of the cooling medium supply head 100 is formed in a substantially X shape having recesses in portions corresponding to the four sides of the square pipe. Therefore, when cutting the four sides of the square pipe, an appropriate distance can be maintained between the cooling medium supply head 100 and the thermal cutting head 12, and the cooling medium supply head 100 is moved by the thermal cutting beam. Direct damage can be prevented.

  Further, the cooling medium supply head 100 used in the thermal cutting apparatus of the present embodiment has a head body 100A made of a porous carbon material, so that the cooling medium is naturally stained on the outer surface of the head body 100A. The head main body 100A itself can be cooled, and damage to the cooling medium supply head 100 due to heat can be prevented.

  Further, the pipe cooling device 500 used in the thermal cutting apparatus of the present embodiment has the cooling medium supply head 100 attached to the tip of the hose 150 via the rotary joint 106 and the hose 150 is fed out by the hose moving device 60. Since the position of the cooling medium supply head 100 can be changed by pulling back or pulling it back, the pipe can be cooled in accordance with the processing situation with a simple configuration.

  In the above embodiment, the cooling medium supply head 100 is provided with a plurality of rollers 130 as a guide device. However, as shown in FIG. 7, a plurality of brushes 330 can be provided as the guide device.

  That is, in the cooling medium supply head 300, an injection nozzle 320 that injects the cooling medium that has passed through the internal passage 310 obliquely rearward is provided at the front portion 312 of the X-shaped head main body 300A, and the rear portion of the head main body 300A. A plurality of brushes 330 are attached to the outer peripheral portion of the rear portion 314 of the frame structure, and the head body 300A floats from the inner wall of the pipe W when these brushes 33 come into contact with the inner wall of the pipe W. I am doing so.

  Thus, when the brush 330 is provided as a guide member, the cooling medium supply head 300 can be smoothly moved in the pipe W with a simple configuration.

1 is an overall side view of a thermal cutting apparatus according to an embodiment of the present invention. It is the same whole top view. It is explanatory drawing of the moving direction of the thermal cutting head with respect to the square pipe which is a workpiece | work, (a) is a front view of a pipe and a thermal cutting head, (b) is a side view of a pipe and a thermal cutting head. FIG. 4 is a cross-sectional view taken along arrow IV-IV in FIG. 1. FIG. 2 is a configuration diagram of a cooling medium supply head, where (a) is a plan view and (b) is a side view. It is sectional drawing seen from the front which shows the relationship between a thermal cutting process head, a pipe, and a cooling medium supply head. It is a perspective view which shows the structure of another cooling-medium supply head.

Explanation of symbols

W Pipe 10 Cutting unit 12 Thermal cutting head 16 Pipe feed mechanism 20 Dust collector 41 Scissor member 42 Cover 50 Pipe support base 52 Pipe support cylinder 52A, 52B, 52C Tube 56 Pipe receiving member 54 Pipe (suction passage)
60 Hose moving device 71, 72, 73, 75 Mounted caster 78 Caster 100 Cooling medium supply head 150 Hose (external cooling medium supply pipe)
P1 Use position P2 Retraction position

Claims (8)

A thermal cutting head that cuts the pipe by irradiating a peripheral wall with a thermal cutting beam from the outside of the pipe, and the pipe is moved toward the front end to move the cutting portion of the pipe to the thermal cutting head. A cutting unit equipped with a pipe feed mechanism for positioning with respect to,
A pipe support that is arranged behind the cutting unit in the pipe feeding direction and supports the rear end side of the pipe extending out of the cutting unit;
A hose inserted from the rear end of the pipe into the pipe supported by the pipe support;
The hose is attached to the tip of the hose and is inserted inside the cutting portion of the pipe by the thermal cutting head, thereby blocking the passage of the thermal cutting beam irradiated from the processing head and cooling medium inside the pipe. A cooling medium supply head for supplying
A hose moving device that extends and retracts the hose so that the position of the cooling medium supply head corresponds to the position of the thermal cutting head;
A thermal cutting apparatus characterized by comprising: The thermal cutting device according to claim 1,
The pipe support base is composed of a pipe support cylinder that accommodates the pipe, and a frame with a caster that supports the pipe support cylinder,
The pipe support cylinder is formed in a telescopic structure in which a plurality of cylinders are slidably combined in a slidable manner, and each frame is provided with a gantry with casters. A thermal cutting apparatus characterized by being made possible. The thermal cutting device according to claim 2,
The pipe support is provided so as to be movable between a use position on an extension line of a pipe extending rearward from the cutting unit and a side retraction position off the extension line. Cutting device. The thermal cutting apparatus according to claim 2 or 3,
The said pipe support cylinder is comprised from the U-shaped eaves member which the upper surface opened, and the cover which can be opened and closed which block | closes the upper surface opening of this eaves member, The thermal cutting processing apparatus characterized by the above-mentioned. The thermal cutting device according to claim 4,
An approximately U-shaped resin pipe receiving member for receiving the pipe by a substantially arc-shaped curved inner surface is provided at an appropriate position in the longitudinal direction inside the flange member. The thermal cutting device according to any one of claims 2 to 5,
A thermal cutting apparatus, wherein a suction passage connected to a dust collector is connected to a rear end of the pipe support cylinder, and fluid inside the pipe can be sucked from the rear end of the pipe. The thermal cutting device according to claim 6,
The dust collecting device is provided in the cutting unit so as to suck dust generated during cutting processing, and a suction passage connected to the dust collecting device is extended to the rear end of the pipe support cylinder to support the pipe. A thermal cutting apparatus characterized by being connected to the rear end of a cylinder. The thermal cutting apparatus according to claim 6 or 7,
The suction passage is formed in a telescopic structure in which a plurality of cylinders are slidably combined in a slidable manner in the same manner as the pipe support cylinder, and a frame with the casters is provided for each cylinder, and these casters are used. Thus, the thermal cutting apparatus is characterized in that the entire length can be expanded and contracted, and the apparatus can be moved to the side retreat position.

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