JP6180256B2 - Pipe inner surface processing equipment - Google Patents

Description

  The present invention relates to a pipe inner surface processing apparatus capable of smoothing the inner surface of various pipes such as a cast pipe, a forged pipe and an aged pipe.

  In cast pipes for water pipes and the like, anticorrosion layers are often formed on the inner surface by powder coating or the like, but the cast pipe has scales on its inner surface after casting. Inner surface processing such as removing rust such as scale is performed. In addition, water pipes that have been used for many years, pipes that take out underground water and underground hot water, etc. have rust on the inner surface. When these pipes are reused, the pipes must be removed to remove rust. Inner surface processing is performed to smooth or clean the inner surface of the substrate.

As an inner surface processing method for smoothing or cleaning the inner surface of such a tube, there are various processing methods such as the following dry and wet methods.
(1) Grinding with a grinding wheel (2) Shots that are blown (collised) with particles or sand, or sand blasting (3) Brushing using wire or sand paper (4) Boring machine Cutting process used

  As another inner surface processing method, there is an inner surface treatment apparatus for a cast iron pipe disclosed in Patent Document 1. As in the present invention, this inner surface treatment apparatus is intended for processing a relatively small diameter and long tube. In this inner surface treatment apparatus, a ring-shaped cutter portion provided with a blade portion on the outer periphery is disposed along the axial direction at a position that is separated from the axial center of the cast iron pipe to be processed by a predetermined distance in the radial direction. The auxiliary shaft center part is externally fitted (freely fitted) with a large gap in the radial direction. The ring-shaped cutter portion and the sub-shaft center portion are rotated about the shaft center of the cast iron pipe to be processed, so that the cutter portion is in sliding contact with (in contact with) the inner surface of the cast iron pipe by centrifugal force. ) And a portion (so-called unhealthy portion) necessary as a removal target on the inner surface of the cast iron pipe can be removed.

Japanese Patent Laid-Open No. 2002-200524

  However, in the grinding process using a grinding wheel, the cutting tool used for grinding is fixed toward the outer periphery of the cylindrical portion, and therefore, it is removed along the concavo-convex portion generated on the inner surface of the workpiece (processing target pipe). Only the necessary parts (so-called unhealthy parts) cannot be removed. Therefore, it is necessary to finish with the thinnest portion as a reference, and the blade is heavily worn and a lot of processing time is required, resulting in a lot of waste.

  In addition, although shot or sand blasting and brushing using wire or sandpaper have the advantage of being able to process along the inner surface of the workpiece (the tube to be processed), the processing force (target rust, rust, etc.) Therefore, there is a problem that the capacity for installing the equipment becomes large and the processing time becomes enormous.

  In addition, in cutting using a boring machine, the quality is good, but it is difficult to remove only the part necessary for removal (so-called unhealthy part), as in grinding with a grinding wheel. There have been problems such as processing loss, excessive quality, requiring a great amount of processing time, and increasing processing costs.

  The inner surface treatment apparatus disclosed in Patent Document 1 has an advantage that only a necessary portion (so-called unhealthy portion) can be removed. However, when the ring-shaped cutter part comes into contact with the inner surface of the workpiece (the tube to be processed), the reaction force causes it to jump off the inner surface of the workpiece and greatly separate, and then compare again until it comes into contact again with centrifugal force. Have time. That is, even when the inner surface treatment apparatus is driven, there is a problem that the time ratio during which the ring-shaped cutter portion is in contact with the inner surface of the workpiece is small, and the processing capability and energy efficiency are low.

  The present invention solves the above-mentioned problems, and can remove only a part (so-called unhealthy part) necessary for removal on the inner surface of the pipe to be machined, while processing the inner surface of the pipe with high machining capacity and energy efficiency. The object is to provide an apparatus.

  In order to solve the above-described problems, the inner surface processing apparatus for a pipe according to the present invention includes a main support shaft supported so as to be inserted into a pipe to be processed, and a rotary support body having an outer diameter smaller than the inner diameter of the pipe. The rotary support is supported so as to be rotatable about the axis of the support shaft, and a plurality of sub-support shafts parallel to the axis of the main support shaft are spaced apart from each other in the circumferential direction of the rotary support. A blade tool having a blade portion is attached to each of the sub-support shafts so as to be swingable in a state in which the center of gravity is different from the swing center, and the blade tool is rotated by the centrifugal force generated by the rotation of the rotary support body. When the blade tool swings in a direction away from the inner surface of the tube due to a reaction force when the blade tool contacts the inner surface of the tube, the blade tool contacts the blade tool, Reversal that moves the cutting tool in a direction in which the blade part comes into contact with the inner surface of the tube again. Wherein the is provided.

  In this configuration, when the rotary support is rotated about the main support shaft, the cutting tool is moved to the inner surface side of the tube by the centrifugal force due to the rotation of the rotary support, and the blade portion of the cutting tool is A part (so-called unhealthy part) necessary to be removed from the inner surface of the pipe is removed by contacting the inner surface. At this time, when the blade portion of the cutting tool comes into contact with the inner surface of the tube, it swings in a direction away from the inner surface of the tube by a reaction force when the cutting tool comes into contact with the inner surface of the tube. The reversing part comes into contact with the cutting tool, and the cutting tool is moved in a direction in which the cutting part comes into contact with the inner surface of the tube again. As a result, the time ratio in which the blade portion of the blade tool abuts on the inner surface of the tube more frequently and the blade portion of the blade tool contacts the inner surface of the tube increases.

  Further, the present invention is characterized in that the blade portion at the time of rocking by centrifugal force is formed along the outer peripheral surface of the blade tool that fluctuates so that the distance from the axis of the sub-support shaft increases sequentially. To do.

  With this configuration, even when the diameter of the inner surface of the tube to be processed is slightly different, the contact portion of the blade portion in the cutting tool is automatically adjusted so that the blade portion is in good contact with the inner surface of the tube. As a result, the same cutting tool can be used for tubes having different diameters to some extent.

  Further, the present invention is characterized in that a protrusion angle restricting portion for restricting a swing angle at which the blade portion of the cutting tool moves outward in the radial direction of the tube is provided. With this configuration, the blade portion of the cutting tool is prevented from excessively moving outward in the radial direction of the tube.

  Further, the present invention is characterized in that a plurality of retractable arms that can be retracted and retracted along the radial direction from the central portion of the tube are provided, and the main support shaft is attached to the tip of each retractable arm. And With this configuration, even when the diameter of the inner surface of the pipe to be processed fluctuates greatly, the inner surface of the pipe can be satisfactorily processed by the inner surface processing device for the pipe having the same structure by adjusting the amount of the retracted arm. can do.

  Further, the present invention is provided with air supply means for supplying air to a suspended portion by the cutting tool on the inner surface of the tube so as to separate the waste generated from the suspended portion by the cutting tool from the suspended portion and cooling the suspended portion. It is characterized by that. With this configuration, the suspended portion (cutting portion) by the cutting tool on the inner surface of the pipe is cooled by the air supplied from the air supply means, and the waste generated from the suspended portion is blown away and is well separated from the inner surface of the tube. Is done.

  Further, the present invention provides a cooling air nozzle that supplies cooling air to a suspended portion (cutting location) (cutting location) by the cutting tool on the inner surface of the tube, and waste generated from the suspended location by the cutting tool. And an air supply hole that feeds out air toward the opening of the tube on the base side.

  With this configuration, the suspended portion (cutting portion) by the cutting tool on the inner surface of the tube is cooled by the cooling air supplied from the cooling air nozzle, and the waste generated from the suspended portion is blown away and separated from the inner surface of the tube. The And since the generated waste (hanging waste) is sent out toward the opening of the tube by the air supplied from the air supply hole, for example, a device for collecting the waste is provided at the location of the opening of the tube. Thus, the waste can be recovered well.

  Further, the present invention is characterized in that the tube is rotated in a direction opposite to the rotation direction of the blade, and the gravity acceleration due to the rotation of the tube is rotated to be less than 1. As described above, the tube is rotated in the direction opposite to the rotation direction of the cutting tool, so that the blade portion of the cutting tool contacts the inner surface of the tube at a relatively high speed, and the inner surface of the tube can be cut well. it can. Further, in this case, if the rotation is performed so that the gravitational acceleration due to rotation is 1 or more, the cutting waste generated at the time of cutting remains attached to the inner surface of the tube due to the centrifugal force at the time of rotation. There is a risk of problems in post-processing such as the formation of a corrosion protection layer on the inner surface. However, in this configuration, since the gravitational acceleration due to the rotation of the inner surface of the tube is rotated so as to be smaller than 1, it is possible to prevent the cutting waste from remaining on the inner surface of the tube due to the centrifugal force during the rotation. , It is possible to prevent the occurrence of problems in post-processing.

  According to the present invention, a portion (so-called unhealthy portion) necessary for removal on the inner surface of the pipe can be removed by the blade portion. In addition, when the reversing part is provided and the cutting tool swings in a direction away from the inner surface of the pipe, the cutting tool is brought into contact with the cutting tool, and the cutting tool is moved in a direction in which the cutting tool comes into contact with the inner surface of the pipe again. As a result, the proportion of time during which the blade portion of the cutting tool abuts against the inner surface of the tube is increased, and the processing capability and energy efficiency can be improved.

  In addition, since the blade portion at the time of rocking by centrifugal force is formed along the outer peripheral surface of the blade tool so that the distance from the shaft center of the sub-support shaft increases sequentially, the size of the tube is to some extent. Even if fluctuates, the same cutting tool can be used, and as a result, the manufacturing cost of the pipe inner surface processing apparatus can be reduced.

  Also, by providing a plurality of retractable arms that can be retracted and retracted along the radial direction from the center of the tube, and attaching the main support shaft to the tip of each retractable arm, the inner surface of the tube to be processed Even when the diameter fluctuates greatly, the inner surface of the tube can be processed satisfactorily by adjusting the amount of the retracting arm so that the inner surface of the tube can be processed well. The manufacturing cost of the processing apparatus can be reduced.

  In addition, by supplying air to the hanging portion by the cutting tool on the inner surface of the tube, separating the waste generated from the hanging portion by the cutting tool from the hanging portion, and providing an air supply means for cooling the hanging portion, The (cutting part) can be cooled, and the waste generated from the hanging part can be well separated from the inner surface of the pipe.

  In addition, a cooling air nozzle that supplies cooling air to the suspended portion (cutting portion) (cutting portion) by the cutting tool on the inner surface of the tube, and scraps generated from the hanging portion by the cutting tool (waste (wounding) processing scrap) By providing an air supply hole that feeds air toward the opening of the tube on the base side of the main support shaft, it is possible to satisfactorily recover waste generated from the suspended portion.

  In addition, by rotating the tube in a direction opposite to the rotation direction of the cutting tool and rotating the tube so that the gravitational acceleration due to the rotation of the tube is smaller than 1, the cutting waste is caused to flow by the centrifugal force during the rotation of the tube. The adhesion to the inner surface can be prevented, the occurrence of defects in post-processing can be prevented, and the reliability can be improved.

It is a side view of the inner surface processing apparatus of the pipe | tube which concerns on embodiment of this invention. It is front sectional drawing of the location in which the rotation support body and cutting tool of the same inner surface processing apparatus are provided, The state which the cutting tool is in contact with the inner surface of a small diameter pipe (small diameter pipe) is shown. It is front sectional drawing of the location in which the rotation support body and blade tool of the same inner surface processing apparatus are provided, and the state which the blade tool has separated from the inner surface of the pipe | tube is shown. It is front sectional drawing of the location in which the rotation support body and cutting tool of the same inner surface processing apparatus are provided, The state which the cutting tool is in contact with the inner surface of a pipe | tube (large diameter pipe | tube) with a large diameter is shown. It is a side view of the location in which the rotation support body and blade tool of the same inner surface processing apparatus are provided. It is a side view of the location in which the rotation support body and the blade tool of the modification of the same inner surface processing apparatus are provided. (A) And (b) is the simplified front view of the blade tool of the inner surface processing apparatus of the pipe | tube which concerns on other embodiment of this invention, and its vicinity location, respectively. It is a front view of the location in which the rotation support body and cutting tool of the inner surface processing apparatus of the pipe | tube which concerns on other embodiment of this invention are provided.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a tube inner surface processing apparatus according to the present invention will be described below with reference to the drawings.

  Reference numeral 1 in FIG. 1 denotes a main support shaft that is supported so as to be inserted into a pipe 2 such as a cast iron pipe to be processed. As shown in FIG. 1, the main support shaft 1 is supported in a substantially horizontal position (specifically, a horizontal position) by a support device 5 mounted on a reciprocating carriage 4 that can travel on a predetermined path along a rail 3. However, it is supported in a freely rotatable state as described later, and is rotated by a main support shaft rotating motor 6 attached to the rear portion of the support device 5. As shown in FIGS. 1 to 3, the distal end portion of the main support shaft 1 is composed of a rotary support 21 having an outer diameter smaller than the inner diameter of the tube 2, a plurality of sub-support shafts 22 and a blade 23 described later, and the like. A cutting unit (hanging unit) 20 for cutting the inner surface of 2 (hanging (bending) processing) is attached.

  As shown in FIG. 1, the support device 5 supports the main support shaft 1 in a cantilever posture, and a compressed air supply hollow shaft 11 as an air supply shaft for supplying compressed air is provided on the outer periphery of the main support shaft 1. The main support shaft 1 is supported coaxially and in a cantilever posture. A compressed air supply device 12 that supplies compressed air into the compressed air supply hollow shaft 11 is attached to the base of the compressed air supply hollow shaft 11. A plurality of cooling air nozzles 13 for supplying cooling air to a cutting portion by the cutting tool 23 on the inner surface of the pipe 2 are attached. Further, in the rear portion of the compressed air supply hollow shaft 11 where the cooling air nozzle 13 is attached, scraps generated from the suspended (wounded) portion (cutting portion) by the cutting tool 23 (hanged (wounded) processing). A large number of air supply holes 15 are formed through which air (in detail, compressed air) is sent out toward the opening 2b of the tube 2 on the base side of the main support shaft 1. In addition, the waste sent out from the opening 2b side of the pipe 2 by air (compressed air) is collected by a waste collection unit 16 arranged in a posture covering the opening 2b of the pipe 2 in a collection device (not shown). The

  The main support shaft 1 with the cutting unit 20 attached to the tip and the compressed air supply hollow shaft 11 with the cooling air nozzle 13 attached to the tip can be inserted into the pipe 2 from the main body 5a of the support device 5. Although the main body portion 5a of the support device 5 is supported on a reciprocating carriage 4 on a platform 5b that can be moved up and down, the shaft of the pivot shaft portion 5c is interposed via the pivot portion 5c. It is supported in a swingable manner around a center 5d (extending left and right). A swinging balance device 14 that supports the main support shaft 1 and the compressed air supply hollow shaft 11 in a movable state is provided on the platform 5 b of the support device 5. The swing balance device 14 detects the behavior of the compressed air supply hollow shaft 11 to estimate the posture of the cutting unit 20 attached to the tip of the main support shaft 1 (the position of the cutting unit 20 during processing). The cutting unit 20 is automatically centered with respect to the inner surface of the tube 3 (moved to the center position), so that the load of the cutting unit 20 hardly acts on the tube 2 to be processed. It is controlled by a provided control unit (not shown).

  The tube 2 to be processed is supported in a rotatable state by a tube rotation support device 30 that rotatably supports the tube 2 via a rotating roller 31, and the tube 2 is rotated at an arbitrary number of rotations. Further, when the tube 2 is processed, the cutting unit 20 is rotated in the direction opposite to the rotation direction of the tube 2 (A direction in FIGS. 2 to 4) (B direction in FIGS. 2 to 4). And it rotates so that the gravity acceleration by rotation of the pipe | tube 2 may become smaller than one.

  As shown in FIGS. 1 to 5, a cutting unit (hanging unit) 20 attached to the distal end portion of the main support shaft 1 extends in the radial direction around the main support shaft 1, and the outer diameter of the cutting unit 20 is a tube 2. A substantially disc-shaped rotary support 21 smaller than the inner diameter, and a plurality of sub-support shafts 22 arranged in parallel to the axis of the main support shaft 1 at intervals with respect to the circumferential direction of the rotary support 21. Each of the sub-support shafts 22 is attached so as to be able to swing with its center of gravity different from the center of swing (that is, the axis of the sub-support shaft 22), and a saw blade 25 is provided on a part of the outer peripheral surface. Corresponding to the auxiliary support shaft 22, the cutting tool 23, which is arranged in parallel with the axis of the main support shaft 1, and the regulation shaft 24 inserted into an arc-shaped long hole 26 formed in the cutting tool 23. I have.

  The rotary support 21 is supported rotatably about the axis of the main support shaft 1, is fixed to the main support shaft 1, and rotates integrally with the main support shaft 1. In this embodiment, four auxiliary support shafts 22, blades 23, and regulating shafts 24 are arranged at intervals with respect to the circumferential direction of the rotary support 21. Three rows are provided along the axial direction of the support shaft 1, and a total of twelve blades 23 are disposed. A rotary support 21 is also disposed between the blades 23 arranged along the axial direction of the main support shaft 1. In addition, it is not restricted to such a form, The auxiliary | assistant support shaft 22, the blade tool 23, and the control shaft 24 are provided in two or three, or five or more at intervals with respect to the circumferential direction of the rotation support body 21. May be. Moreover, the number of the cutting tools 23 arranged along the axial center direction of the main support shaft 1 may be provided in four rows or more, or only one row or two rows may be provided. Further, in this embodiment, the blade portion 25 of the blade 23 is formed in a saw blade shape, but the present invention is not limited to this, and the blade portion may be constituted by a grinding wheel or the like.

  As shown in FIG. 2, when the rotary support 21 is rotated in the B direction together with the main support shaft 1, the cutting tool 23 (specifically, the blade portion 25 of the cutting tool 23) is caused by the centrifugal force based on the rotation of the rotary support 21. The sub-support shaft 22 is arranged to move in the C direction toward the inner surface 2a side of the tube 2 with the auxiliary support shaft 22 as a fulcrum. Further, when the blade portion 25 of the blade 23 abuts against the inner surface 2a of the tube 2 and the so-called unhealthy portion such as rust generated at the inner surface 2a of the tube 2 and this portion is deleted, it is shown in FIG. In this manner, the reaction force at the time of contact oscillates in the D direction (the direction opposite to the C direction) that is separated from the inner surface 2a of the tube 2. Comes into contact with one end portion 26a of the long hole 26, and as shown in FIG. 2, the blade 23 is moved in the C direction in which the blade portion 25 comes into contact with the inner surface 2a of the tube 2 again. In other words, the restriction shaft 24 and the one end portion 26a of the long hole 26 in contact with the restriction shaft 24 are restricted so that the angle at which they are separated (retracted) from the inner surface of the tube 2 is minimized, and the cutting tool 23 is controlled. The blade part 25 functions as a reversing part (reverse angle regulation reversing part) for reversing in the D direction where it comes into contact with the inner surface 2a of the tube 2 again.

  Further, as shown in FIG. 4, the shape (position) of the other end portion 26 b of the long hole 26 is determined so that the cutting tool 23 does not protrude excessively toward the radially outer side of the tube 2. Specifically, even when the inner surface 2a of the largest pipe 2 (2B) to be hung (grinded) is to be hung (grinded) using this cutting tool 23, it can be hung without hindrance. The position of the restriction shaft 24 and the other end portion 26b of the long hole 26 that contacts the restriction shaft 24 is determined with the position (which can be ground) as a limit. As described above, in this embodiment, the maximum protrusion angle of the blade 23 (specifically, the blade portion 25 of the blade 23 is maximized outward in the radial direction of the tube 2) by the other end portion 26 b of the long hole 26 and the restriction shaft 24. A protrusion angle restricting portion for restricting the swing angle when projecting (swinging) is formed. 2 and 3, the pipe 2A having the smallest diameter in the pipe 2 to be processed by the inner surface processing apparatus is indicated by a solid line, and the pipe 2B having the largest diameter in the pipe 2 to be processed is indicated by a virtual line ( This is indicated by a two-dot chain line). FIG. 4 shows a case where the pipe 2 to be processed is the pipe 2B having the largest diameter.

  As shown in FIGS. 2 to 4, in this embodiment, the distance between the blade portion 25 when oscillating by the centrifugal force and the oscillation center of the blade tool 23 (the axis of the auxiliary support shaft 22) is as follows. It is formed along the outer peripheral surface of the blade 23 that fluctuates so as to increase sequentially. That is, when the cutting tool 23 is swung by centrifugal force and the blade 25 comes into contact with the inner surface 2a of the tube 2, the blade 25 is swung and the blade 25 is first formed in contact with or close to the blade 25. With respect to the surface, the distance from the center of oscillation is small (see dimension L1 in FIG. 2), and the distance between the forming surface of the blade portion 25 and the center of oscillation gradually increases as it oscillates, and grinding is performed as shown in FIG. When the diameter of the target tube 2 is large, the distance between the forming surface of the blade portion 25 and the swing center is large (see dimension L2 in FIG. 4). Is formed.

  In this embodiment, after the compressed air supplied from the compressed air supply device 12 is forcibly swirled in the compressed air supply hollow shaft 11, the compressed air that has turned into a swirl flow is cooled and heated. The cooling air is ejected from the cooling air nozzle 13 to the cutting unit 20 side, while the warmed air is ejected from the air supply hole 15 so that the cutting unit 20 is excellent without providing a separate cooling means. The waste can be recovered to the outside by the waste recovery unit 16 while being cooled.

  In the above configuration, when the tube 2 is rotated while the cutting unit 20 is inserted into the tube 2, and the rotating support 21 is rotated about the main support shaft 1, the cutting tool 23 is attached to the rotating support 21. It moves to the inner surface 2a side of the tube 2 by centrifugal force based on the rotation, and the blade portion 25 of the cutting tool 23 comes into contact with the inner surface 2a of the tube 2 (see FIGS. 2 and 4). In this state, the reciprocating carriage 4 is moved on the rail 3. Thereby, the part (so-called unhealthy part) required for removal in the inner surface 2a of the pipe 2, such as rust, can be removed.

  At this time, when the blade portion 25 of the cutting tool 23 comes into contact with the inner surface 2a of the tube 2 to be processed, the cutting tool 23 swings in a direction away from the inner surface 2a of the tube 2 by the reaction force at this time. However, since the blade 23 is formed with a reversing portion composed of the restriction shaft 24 and one end portion 26a of the long hole 26, the one end portion 26a of the long hole 26 abuts against the restriction shaft 24 as shown in FIG. Then, the blade tool 23 is moved in a direction (D direction) in which the blade portion 25 again comes into contact with the inner surface 2a side of the tube 2. As a result, the blade portion 25 of the blade 23 abuts on the inner surface 2a of the tube 2 more frequently than in the conventional case where the blade moves to the inner surface side of the tube only by centrifugal force. While the inner surface processing apparatus is driven, the time ratio in which the blade portion 25 of the blade 23 abuts against the inner surface 2a of the pipe 2 is increased, and as a result, the processing ability and energy efficiency can be improved.

  Further, according to the above configuration, the blade portion 25 at the time of rocking by the centrifugal force is formed along the outer peripheral surface of the blade tool 23 that fluctuates so that the distance from the axis of the auxiliary support shaft 22 increases sequentially. Therefore, even if the diameter of the inner surface 2a of the tube 2 to be processed is slightly different, the contact position of the blade portion 25 in the cutting tool 23 is automatically adjusted, and the blade portion 25 is good for the inner surface 2a of the tube 2 Abut. Thereby, the same cutting tool 23 and the inner surface processing apparatus of the pipe 2 can be used for the pipe 2 having a different diameter to some extent, and the manufacturing cost of the inner surface processing apparatus of the pipe can be reduced.

  In addition, there are provided a regulating shaft 24 as a protruding angle regulating portion and a second end portion 26b of the long hole 26 for regulating a swing angle at which the blade portion 25 of the blade 23 moves outward in the radial direction of the tube 2. By the configuration, the blade portion 25 of the cutting tool 23 is prevented from excessively moving outward in the radial direction of the tube 2, and the reliability is improved.

  Moreover, according to the said structure, since the cooling air nozzle 13 which supplies cooling air to the suspending (turning) location (cutting location) by the cutting tool 23 in the inner surface 2a of the pipe 2 is provided, the suspending (setting) location is set. While being cooled well, it is possible to carry out a hulling process. Further, since the tube 2 is rotated in the direction opposite to the rotation direction of the blade 23 and is rotated so that the gravitational acceleration due to the rotation of the tube 2 is smaller than 1, the cutting is performed by the centrifugal force when the tube 2 is rotated. It is possible to prevent debris from remaining on the inner surface 2a of the tube 2. Moreover, since the air supply hole 15 which feeds the waste generated from the cutting location with air toward the opening of the tube 2 on the base side of the main support shaft 1 is provided, the scrap is generated from the location where the cutting tool 23 hangs. The scraps can be guided well toward the opening 2b of the tube 2 on the base side of the main support shaft 1, and the scraps recovery unit 16 can recover the scraps to a recovery device outside the figure.

  In the above embodiment, the case where the plurality of cooling air nozzles 13 for supplying the cooling air to the cutting portion (hanging portion) is attached to the outer periphery of the distal end portion of the compressed air supply hollow shaft 11 is described. It is not limited. For example, instead of attaching the cooling air nozzle 13, as shown in FIG. 6, as shown in FIG. 6, a processing portion air supply hole (another example of the air supply means) that supplies air toward the suspended portion at the tip portion of the main support shaft 1. ) 17 is formed, and air is ejected from the processed portion air supply hole 17 toward the suspended portion, and the waste generated by the suspended portion (cutting portion) by the cutting tool 23 (debris due to the suspended portion) is removed from the inner surface of the tube 2. The suspension part may be cooled while being separated. Moreover, you may provide both the cooling air nozzle 13 of the said compressed air supply hollow shaft 11, and the process part air supply hole 17 which ejects air from the front-end | tip part of the main support shaft 1.

  In addition, it may replace with the blade tool 23 etc. of the said embodiment, and may provide the blade tool 40 etc. which are shown to Fig.7 (a), (b) (other embodiment). In this embodiment, the cutting tool 40 has a substantially circular shape and the blade part 41 is formed on a part of the outer peripheral surface. However, the swing shaft is located at a position farther from the blade part 41 than the center of gravity of the cutting tool 40. A secondary support shaft 22 is attached. In addition, the blade part 41 at the time of rocking | fluctuation by a centrifugal force is formed along the outer peripheral surface of the blade tool 40 which fluctuates so that the distance from the rocking | fluctuation center (axial center of the subsupport shaft 42) of the blade tool 40 may become large sequentially. This is the same as the above embodiment. FIG. 7A shows a case where the pipe 2 (2A) as a processing target (hanging (swinging) processing target) has a relatively small diameter, and FIG. ) A case where the pipe 2 (2B) to be processed has a relatively large diameter is shown.

  In addition, the blade 40 is not formed with a long hole as in the above-described embodiment, and instead of this, from the inner surface 2a of the tube 2 due to the reaction force when the blade 40 abuts against the inner surface 2a of the tube 2. When swinging in the direction of separation, the blade 40 abuts against the cutting tool 40 (see the imaginary line part in FIGS. 7A and 7B), and the cutting tool 40 has its blade part 41 on the inner surface 2a of the tube 2. A shaft-like reversing portion 43 that moves in the direction of contact again is provided.

  Further, a shaft-like projecting angle restricting portion that restricts the swing angle at which the blade portion 41 of the blade 40 moves outward in the radial direction of the tube 2 so that the blade tool 40 does not protrude excessively toward the radially outer side of the tube 2. 44 is provided. In this embodiment, the reversing part 43 and the protrusion angle restricting part 44 are provided at different positions, and are fixed to the rotary support 21 respectively.

  Also according to this embodiment, it is possible to obtain substantially the same effect as the above embodiment. In this embodiment, as a set of components for grinding the inner surface 2a of the pipe 2, four components, that is, the auxiliary support shaft 22, the cutting tool 40, the reversing portion 43, and the protruding angle regulating portion 44 are required. On the other hand, in the above embodiment as shown in FIGS. 2 to 4, three sets of the auxiliary support shaft 22, the cutting tool 23, and the restriction shaft 24 are used as a set of components for grinding the inner surface 2 a of the pipe 2. There is an advantage that can be done with parts. On the other hand, the form shown in FIG. 5 has an advantage that the cutting tool 40 can be manufactured relatively easily because it is not necessary to form a long hole or the like in the cutting tool 40.

  Moreover, although the case where the rotation support body 21 was directly fixed to the main support shaft 1 was described in embodiment shown in FIGS. 2-5, it is not restricted to this. FIG. 8 shows a pipe inner surface machining apparatus according to another embodiment. As shown in FIG. 8, in this inner surface processing apparatus, a rotation base 52 is fixed to a rotation support shaft 51 that can be rotated, and the rotation base 52 is located laterally (centering on the axis of the rotation support shaft 51. A plurality of (four in the case shown in FIG. 8) retractable arms 53 that are freely retractable along the radially outer side), and the main support shaft 1 is attached to the tip of each retractable arm 53, A cutting unit 20 similar to the above (similar to that shown in FIGS. 1 to 5) is attached to the rotary support 21 attached to the main support shaft 1. When cutting is performed, the rotation support shaft 51 and the rotation base 52 rotate, the cutting unit 20 revolves, and the cutting unit 20 itself also rotates and rotates.

  According to this pipe inner surface processing apparatus, it is possible to satisfactorily grind the inner surface of even a very large pipe 2, and even when the diameter of the inner surface of the pipe 2 to be processed fluctuates greatly, By adjusting the retracting amount of the retracting arm 53, the inner surface of the tube can be satisfactorily processed using the inner surface processing device of the tube having the same structure, and the inner surface processing device of the tube is manufactured individually. In comparison, it is possible to reduce the manufacturing cost of the pipe inner surface processing apparatus.

  The tube inner surface processing apparatus of the present invention can process the inner surfaces of various tubes.

DESCRIPTION OF SYMBOLS 1 Main support shaft 2 Pipe | tube 2a Inner surface 5 Support apparatus 6 Main support shaft rotation motor 11 Compressed air supply hollow shaft 12 Compressed air supply apparatus 13 Cooling air nozzle 14 Oscillation equilibration apparatus 15 Air supply hole 16 Cutting waste collection part 17 Processing part Air supply hole 20 Cutting unit 21 Rotating support body 22, 42 Sub-support shaft 23, 40 Cutting tool 24 Restriction shaft 25, 41 Blade portion 26 Long groove 26a One end portion (reversing portion)
26b The other end (projection angle restricting portion)
DESCRIPTION OF SYMBOLS 30 Pipe rotation support apparatus 31 Rotation roller 43 Inversion part 44 Projection angle control part 51 Rotation support shaft 52 Rotation base 53 Retracting arm

Claims (7)

A rotation support body having an outer diameter smaller than the inner diameter of the tube is supported on the main support shaft that is supported so as to be inserted into the tube to be processed, and is rotatable about the axis of the main support shaft.
In the rotary support, a plurality of sub-support shafts are provided in parallel with the axis of the main support shaft at intervals with respect to the circumferential direction of the rotary support,
A cutting tool having a blade portion is attached to each sub-support shaft so that the center of gravity is different from the center of swinging, and the cutting tool is moved to the inner surface side of the tube by the centrifugal force generated by the rotation of the rotating support. Arranged to
When the cutting tool swings in a direction away from the inner surface of the tube due to a reaction force when the cutting tool comes into contact with the inner surface of the tube, the cutting tool comes into contact with the cutting tool, and the blade portion is brought into contact with the inner surface of the tube. An inner surface processing apparatus for a pipe, wherein a reversing section is provided for moving in a direction to come into contact again.   The blade part when rocking | fluctuating with a centrifugal force is formed along the outer peripheral surface of the blade tool which fluctuates so that the distance from the axial center of a sub-support shaft may become large sequentially. Pipe inner surface processing equipment. The inner surface processing apparatus for a pipe according to claim 1 or 2, further comprising a protrusion angle restricting part for restricting a swing angle at which the blade part of the blade moves outward in the radial direction of the pipe.   A plurality of retractable arms that can be retracted and retracted along a radial direction from a central portion of the tube are provided, and the main support shaft is attached to a distal end portion of each retractable arm. The pipe inner surface processing apparatus according to any one of claims 3 to 4.   An air supply means is provided for supplying air to a hanging portion by the cutting tool on the inner surface of the tube so as to separate the waste generated from the hanging portion by the cutting tool from the hanging portion and cooling the hanging portion. Item 5. The pipe inner surface processing apparatus according to any one of Items 1 to 4.   A cooling air nozzle as the air supply means for supplying cooling air to the suspended portion by the cutting tool on the inner surface of the tube, and scrap generated from the suspended portion by the blade tool, the opening of the tube on the base side of the main support shaft The pipe inner surface processing apparatus according to claim 5, further comprising an air supply hole that feeds air toward the air.   The said pipe | tube is rotated so that the gravitational acceleration by rotation of this pipe | tube may be made in the direction opposite to the rotation direction of the said cutting tool, and it may be made to become smaller than one. Pipe inner surface processing equipment.

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