A multifunctional device for removing a film from a pipe is disclosed. The multifunctional device for removing a film from a pipe, according to the present invention, is a device for removing a film from the inner surface or outer surface of a pipe, and comprises: a tool part for removing the film; a roller part including at least one surface roller traveling on the inner surface or outer surface of the pipe; and a connection part including a first plate connected to the tool part, and a second plate which is arranged on the other side of the first plate so as to be connected to the first plate through one shaft and which is connected to the roller part.
A multifunctional device for removing a film from a pipe is disclosed. The multifunctional device for removing a film from a pipe, according to the present invention, is a device for removing a film from the inner surface or outer surface of a pipe, and comprises: a tool part for removing the film; a roller part including at least one surface roller traveling on the inner surface or outer surface of the pipe; and a connection part including a first plate connected to the tool part, and a second plate which is arranged on the other side of the first plate so as to be connected to the first plate through one shaft and which is connected to the roller part.
B08B 9/04 - Nettoyage des surfaces intérieuresÉlimination des bouchons utilisant des dispositifs de nettoyage introduits dans et déplacés le long des tubes
3.
Facing machine for preventing inflow of cutting chips into tube
A tube-facing machine includes a driving unit including a driving shaft and a motor for rotating the driving shaft, a cutting unit including a cutting tip mounted to the front end of the driving shaft and having a blade, and a tube-mounting unit. The cutting tip is disposed such that an angle between an imaginary reference line extending outwards from the center point of the tube in a radial direction and an imaginary line extending from the center point of the tube to a point at which the blade meets the inner circumference of the tube in a rotating direction of the cutting tip is greater than an angle between the imaginary reference line and another imaginary line extending from the center point of the tube to a point at which the blade meets the outer circumference of the tube in the rotating direction of the cutting tip.
B23B 5/16 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour biseauter, chanfreiner, ou ébavurer les extrémités de barres ou de tubes
B23C 3/12 - Ébavurage ou finition des arêtes, p. ex. ébarbage des angles soudés
B23C 5/02 - Outils de fraisage caractérisés par la forme de la fraise
A pipe cutting device includes: a body; a pipe fixing part disposed adjacent to a hollow hole of the body and capable of fixing a pipe; a rotating plate coupled to the body so as to be rotatable about a center axis of the hollow hole and connected to a first driving part to be rotationally controlled; a cam coupled to the rotating plate so as to be rotatable about a rotation shaft at a point spaced apart from the center axis; and a cutter part coupled to the rotating plate to rotate together with the rotating plate and to come into contact with the cam such that, according to rotation of the cam, a cutting tip moves forwards and backwards the center axis.
B26D 3/16 - Coupe de tiges ou de tubes transversalement
B26D 1/42 - Coupe d'une pièce caractérisée par la nature ou par le mouvement de l'élément coupantAppareils ou machines à cet effetÉléments coupants à cet effet comportant un élément qui ne suit pas le mouvement de la pièce ayant un élément coupant se déplaçant autour d'un axe avec un élément coupant non circulaire se déplaçant autour d'un axe parallèle à la ligne de coupe et monté de façon à coulisser dans un organe rotatif
B26D 7/01 - Moyens pour maintenir ou mettre en position la pièce
B26D 7/26 - Moyens de montage ou de réglage de l'outil de coupeMoyens de réglage de la course de l'outil de coupe
A pipe machining carriage, including a carriage configured to travel along an outer circumference of a pipe, and a chain coupled to both ends of the carriage wraps around the outer surface of the pipe. The carriage and the chain precisely move along the outer surface of the pipe. The disclosure may provide a carriage that performs machining with high accuracy by preventing the carriage from deviating from the original mounted position by moving the chain along with movement of the carriage. The disclosure may also provide a carriage mounted stably on the outer circumferential surface of the pipe to machine the pipe, regardless of pipe diameter, by adjusting a distance between the carriage drive wheels. The disclosure may prevent the carriage from slipping by mounting a front wheel and a rear wheel to the same drive shaft so the front and rear wheels rotate simultaneously in response to motor operation.
The present invention relates to a tube facing machine capable of easily discharging, to the outside, chips generated when cutting an end part of a tube. The tube facing machine comprises: a driving unit rotated by a motor and including a driving shaft formed by a coupling of a first shaft and a second shaft that constitute a front end and a rear end, respectively, and a housing enclosing the rear end of the driving shaft and the motor; a cutting unit mounted on the front end of the driving shaft and including a cutting tip having a blade; and a tube mounting unit of a pipe shape, which is connected to a front side of the housing so as to accommodate the cutting unit, has a discharge hole formed on a side surface where the cutting unit is located, and has a tube to be cut mounted on the front end thereof. The cutting tip is located such that angle a, which is an angle from a virtual reference line penetrating the central point of the tube and one side on an outer circumference of the tube to a point where the blade comes in contact with an inner circumferential edge of the tube in the rotary direction of the cutting tip, is greater than angle b, which is an angle from the reference line to a point where the blade comes in contact with an outer circumferential edge of the tube in the rotary direction of the cutting tip.
The present invention relates to an electrode rod grinder. More specifically, the present invention provides an electrode rod grinder having a multi-collet, the electrode rod grinder comprising: a collet comprising a guide member, one side of which is open such that one end of an electrode rod is inserted therein, and a holding member contained in the guide member, the holding member comprising at least three holding blocks and a holding spring for connecting holding blocks adjacent to each other, the holding blocks being disposed so as to surround one end of the electrode rod such that the electrode rod is tightened and fixed by an external force; a driving unit comprising a motor, a grinding wheel connected to a driving shaft of the motor so as to rotate, and a housing surrounding the rear end of the driving shaft and the motor; and a head coupled to the front side of the housing so as to contain the grinding wheel, multiple polishing holes being formed on the outer surface of the head such that the collet can be mounted thereon. The polishing holes are formed such that the direction of extension thereof intersects with the front surface of the grinding wheel. Accordingly, electrode rods having various diameters can be inserted into one hole, and end shapes of the electrode rods can be formed at desired angles.
B24B 19/16 - Machines ou dispositifs conçus spécialement pour une opération particulière de meulage non couverte par d'autres groupes principaux pour meuler des pièces pointues, p. ex. aiguilles, plumes, hameçons, pinces ou aiguilles de lecture d'enregistrement
B24B 41/06 - Supports de pièces, p. ex. lunettes réglables
Gas welding machines; gas cutting machines; metalworking machines, namely, milling machines and lathe machines for metalworking; metalworking machine tools; circular saw blades for metalworking, namely, blades for power saws; grinding machines for metalworking; cutting machines for metalworking; perforating machines for metalworking; control mechanisms for machines, engines or motors, namely, hydraulic controls for machines, motors and engines; gears for machines; bearing housings for machines; tables for machines, namely, tables specially adapted to hold powered machinery; transmissions for machines; saw machines; band saws; inverter CO2 welding machines being gas operated welding machines; inverter MIG welding machines being electric welding machines; inverter TIG welding machines being electric welding machines; inverter digital welding machines being electric welding machines; welding machines, electric; electric welding apparatus; power-operated saws; cutting machines; machine parts, namely, blades; machines for plastics working
Gas welding machines; gas cutting machines; metalworking machines, namely, milling machines and lathe machines for metalworking; metalworking machine tools; circular saw blades for metalworking, namely, blades for power saws; grinding machines for metalworking; cutting machines for metalworking; perforating machines for metalworking; control mechanisms for machines, engines or motors, namely, hydraulic controls for machines, motors and engines; gears for machines; bearing housings for machines; tables for machines, namely, tables specially adapted to hold powered machinery; transmissions for machines; saw machines; band saws; inverter CO2 welding machines being gas operated welding machines; inverter MIG welding machines being electric welding machines; inverter TIG welding machines being electric welding machines; inverter digital welding machines being electric welding machines; welding machines, electric; electric welding apparatus; power-operated saws; cutting machines; machine parts, namely, blades; machines for plastics working
Wholesale and retail store services and online wholesale and retail store services featuring cutting machines, metalworking machines, stone working machines, saws as machine tools, saw blades as machine tools, and metal vice benches
Gas welding machines; gas cutting machines; machine tools; metalworking machines; metalworking machine tools; circular saw blades for metalworking; grinding machines for metalworking; cutting machines for metalworking; perforating machines for metalworking; control mechanisms for machines, engines or motors; apparatus for machining; gears for machines; bearing housings for machines; tables for machines; transmissions for machines; saws [machines]; band saws; inverter CO2 welding machines; inverter MIG welding machines; inverter TIG welding machines; inverter digital welding machines; welding machines, electric; electric welding apparatus; power-operated saws; cutters [machines]; blades [parts of machines]; machines for plastics working.
Wholesale services for cutters [machines]; retail services for cutters [machines]; wholesale services for metalworking machines; retail services for metalworking machines; wholesale services for stone working machines; retail services for stone working machines; wholesale services for saws [machines]; retail services for saws [machines]; wholesale services for saw blades [parts of machines]; retail services for saw blades [parts of machines]; wholesale services for metal vice benches; retail services for metal vice benches.
Gas welding machines; gas cutting machines; machine tools; metalworking machines; metalworking machine tools; circular saw blades for metalworking; grinding machines for metalworking; cutting machines for metalworking; perforating machines for metalworking; control mechanisms for machines, engines or motors; apparatus for machining; gears for machines; bearing housings for machines; tables for machines; transmissions for machines; saws [machines]; band saws; inverter CO2 welding machines; inverter MIG welding machines; inverter TIG welding machines; inverter digital welding machines; welding machines, electric; electric welding apparatus; power-operated saws; cutters [machines]; blades [parts of machines]; machines for plastics working.
A machine for cutting or beveling a pipe. A cutter unit rotates around the pipe while cutting any surface of the pipe after gripping and fixing the pipe. The machine includes: a main body which a pipe passes through the center portion thereof to be fixed; and a cutter unit coupled to the main body unit rotates around the fixed pipe to cut or bevel the pipe. The cutter unit may have a rotating unit on one side to pull the cutter unit aside and a locking unit on the other side to restrain or release the cutter unit. An entry control unit operating the cutter unit includes: a lever gear-engaged with an outer side surface of an entry control plate; and a clutch formed on a rotation shaft of the lever such that the restraint is released when the lever is lifted or pressed in the axial direction.
B23C 3/12 - Ébavurage ou finition des arêtes, p. ex. ébarbage des angles soudés
B23C 1/12 - Machines à fraiser non conçues pour des pièces particulières ou des opérations spéciales avec une broche orientable sous différents angles, p. ex. horizontalement ou verticalement
B23Q 9/02 - Agencements pour le support ou le guidage d'appareils ou de machines portatifs pour le travail du métal pour fixer des machines ou des appareils aux pièces à travailler ou à d'autres pièces de formes particulières, p. ex. à des poutrelles de section particulière
B23D 21/04 - Machines à sectionner les tubes comportant des supports d'outils rotatifs
B26D 3/16 - Coupe de tiges ou de tubes transversalement
B23B 5/16 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour biseauter, chanfreiner, ou ébavurer les extrémités de barres ou de tubes
B23Q 9/00 - Agencements pour le support ou le guidage d'appareils ou de machines portatifs pour le travail du métal
B23D 33/02 - Agencements pour tenir, guider ou faire avancer les pièces pendant le travail
B26D 7/02 - Moyens pour maintenir ou mettre en position la pièce comportant des moyens de serrage
Disclosed is a dedicated machine capable of cutting or beveling a pipe, such as a circular pipe or bar, in such a manner that a cutter unit rotates around the pipe while cutting any one surface of the pipe after gripping and fixing the pipe. A pipe cutting and beveling machine, according to the present invention, comprises: a main body unit in which a pipe passes through the center portion thereof so as to be fixed; and a cutter unit which is coupled to the main body unit so as to cut or bevel the pipe by means of a cutting blade while rotating around the fixed pipe, wherein the cutter unit may be provided with a rotating unit on one side thereof so as to pull the cutter unit aside and a locking unit on the other side thereof so as to restrain or release the cutter unit from being pulled aside. In addition, an entry control unit, which operates the cutter unit to move forward or backward, may comprise: a lever which is gear-engaged with an outer side surface of an entry control plate; and a clutch which is formed on a rotation shaft of the lever such that the restraint thereof is released when the lever is lifted or pressed in the axial direction.
B23D 21/04 - Machines à sectionner les tubes comportant des supports d'outils rotatifs
B23D 33/02 - Agencements pour tenir, guider ou faire avancer les pièces pendant le travail
B23C 3/12 - Ébavurage ou finition des arêtes, p. ex. ébarbage des angles soudés
16.
Orbital cutting apparatus capable of freely and selectively controlling plurality of cutting tools within rotating body by using rotational speed ratio
Disclosed is an orbital cutting apparatus that is capable of freely and selectively controlling forward and backward movement of a plurality of cutting tools, allowing the cutting tools to move forward and backward and to move in an axial direction of a material to be cut so as to enable processing of various shapes as well as cutting and chamfering, and is capable of simultaneously carrying out cutting and chamfering operations for a pipe material or a heavy pipe having a thickness of dozens of mm or more.
B23B 5/08 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour tourner des essieux, barres, tiges, tubes, cylindresTournage sans centre
B23B 3/26 - Machines ou dispositifs à tourner à têtes porte-outils rotatives dont les outils effectuent un mouvement radialTêtes porte-outils rotatives appropriées
B23D 21/04 - Machines à sectionner les tubes comportant des supports d'outils rotatifs
B23D 21/00 - Machines ou dispositifs pour le cisaillage ou le tronçonnage de tubes
B26D 3/16 - Coupe de tiges ou de tubes transversalement
17.
Power transfer device, orbital pipe cutting device and hydraulic chucking device
Disclosed are a power transfer device for transferring external power to a rotary body, a pipe cutting device using the power transfer device and a hydraulic chucking device using the power transfer device. The power transfer device is configured to transfer external power to a rotary body coupled to one side of a main body. The power transfer device includes at least one double-action interlocking cylinder mounted to a rear surface of the rotary body and provided with a rod protruding toward the main body, a push unit installed in the main body and provided with at least one pusher protruding toward the rotary body, and a bearing disposed between the pusher of the push unit and the rod of the interlocking cylinder and configured to allow relative rotation of the pusher and the rod and to transfer power between the pusher and the rod.
B23B 5/08 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour tourner des essieux, barres, tiges, tubes, cylindresTournage sans centre
B23B 3/26 - Machines ou dispositifs à tourner à têtes porte-outils rotatives dont les outils effectuent un mouvement radialTêtes porte-outils rotatives appropriées
B23B 31/10 - Caractérisés par les dispositifs de maintien ou de serrage ou par leurs moyens d'action directe
B23B 31/12 - Mandrins avec mors à action simultanée, qu'ils soient ou non réglables individuellement
B23B 31/16 - Mandrins avec mors à action simultanée, qu'ils soient ou non réglables individuellement déplaçables radialement
F15B 7/00 - Systèmes de manœuvre utilisant la pression d'un fluide dans lesquels le mouvement produit est lié de façon définie au débit d'une pompe volumétriqueTélémoteurs
F15B 15/06 - Schéma mécanique de montage caractérisé par les moyens transformant le mouvement de l'élément entraîné par le fluide en mouvement de l'organe terminal qui est actionné pour la transformation mécanique d'un mouvement rectiligne en un mouvement non rectiligne
F15B 15/14 - Dispositifs actionnés par fluides pour déplacer un organe d'une position à une autreTransmission associée à ces dispositifs caractérisés par la structure de l'ensemble moteur le moteur étant du type à cylindre droit
B23Q 7/04 - Agencements pour la manipulation des pièces, spécialement combinés aux machines-outils ou disposés dans ces machines ou spécialement conçus pour être utilisés en relation avec ces machines, p. ex. pour le transport, le chargement, le positionnement, le déchargement, le triage au moyen de pinces
18.
Apparatus for processing circular or square tube or bar material to desired shape by freely controlling cutting tool by wireless communication
An apparatus for processing material to a desired shape by controlling a cutting tool by wireless communication, capable of performing cutting/beveling and processing using one cutting tip and performing cutting and improvement operations of a tube material. The processing apparatus includes a drive wheel rotatably coupled to one side of a main body part while a workpiece penetrates the drive wheel, a main motor unit for rotating the drive wheel (in a C-axis direction), at least one stage coupled to the front of the drive wheel to precisely reciprocate in a center direction of the workpiece (in an X-axis direction), a cutting tool mounted to the stage so as to cut an outside surface or an end surface portion of the workpiece, and a control unit for controlling the stage and the main motor unit, wherein the control unit and the stage are controlled by wireless communication.
B23Q 15/007 - Commande automatique ou régulation du mouvement d'avance, de la vitesse de coupe ou de la position tant de l'outil que de la pièce pendant l'action de l'outil sur la pièce
B23C 3/00 - Fraisage de pièces particulièresOpérations de fraisage spécialesMachines à cet effet
B23B 3/26 - Machines ou dispositifs à tourner à têtes porte-outils rotatives dont les outils effectuent un mouvement radialTêtes porte-outils rotatives appropriées
B23B 5/08 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour tourner des essieux, barres, tiges, tubes, cylindresTournage sans centre
B23Q 17/00 - Agencements sur les machines-outils pour indiquer ou mesurer
19.
ORBITAL CUTTING APPARATUS CAPABLE OF FREELY AND SELECTIVELY CONTROLLING PLURALITY OF CUTTING TOOLS WITHIN ROTATING BODY BY USING ROTATIONAL SPEED RATIO
Disclosed is an orbital cutting apparatus capable of freely and selectively controlling forward and backward movements to/from a plurality of cutting tools, allowing the cutting tools to move forward and backward and move in an axial direction of a material being cut so as to enable cutting, chamfering and machining of various shapes, and capable of simultaneously carrying out cutting and chamfering operations for a pipe material or a heavy pipe having a thickness of several tens of mm or more. The orbital cutting apparatus, according to the present invention, comprises: a spindle rotating unit coupled to one surface of a main body unit so as to rotate (C axis); a plurality of tool units coupled to reciprocate (X axis) toward the center part of the spindle rotating unit on the front surface of the spindle rotating unit, thereby cutting the clamped material in an orbital manner; a relative movement unit coupled to the main body unit on the opposite side of the spindle rotating unit to enable rotation by synchronizing with the spindle rotating unit, and transferring power to the plurality of tool units so as to allow the tool units to reciprocate; a connection gear formed at the ends of driving shafts of the tool units so as to selectively engage with the relative movement unit, such that the power of the relative movement unit is received; an operation unit for allowing the selected connection gear to engage with or be spaced from the relative movement unit; and a control unit for controlling the movements of the spindle rotating unit and the relative movement unit.
B23B 5/08 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour tourner des essieux, barres, tiges, tubes, cylindresTournage sans centre
B26D 3/16 - Coupe de tiges ou de tubes transversalement
B23D 21/00 - Machines ou dispositifs pour le cisaillage ou le tronçonnage de tubes
20.
POWER TRANSMITTING DEVICE FOR TRANSMITTING EXTERNAL FORCE INTO ROTATING BODY, AND ORBITAL PIPE CUTTING DEVICE AND HYDRAULIC CHUCKING DEVICE ABLE TO FREELY CONTROL CUTTING TOOL MOVEMENT INSIDE ROTATING BODY BY USING THE POWER TRANSMITTING DEVICE
Disclosed are: a power transmitting device that can be used to freely control specific objects inside a rotating body, which rotates at high speed, by directly transmitting an external force into the rotating body while the rotation remains unaffected; and a pipe cutting device and a hydraulic chucking device using the power transmitting device. The power transmitting device according to the present invention comprises: at least one linked-movement cylinder which is fitted in such a way that a rod projects to the side of a main body, on the back surface of the rotating body; a push part which is provided towards the main body so as to have at least one pusher projecting towards the rotating body; and a bearing which is coupled so as to perform an axially rotating action and perform an action whereby an axially-oriented load is transmitted, between the pusher and the rod. Such a power transmitting device can be used as a pipe cutting device by fitting a cutting tool that performs a reciprocating movement due to a hydraulic cylinder at the front of the rotating body, and by constructing the hydraulic cylinder and the linked-movement cylinder as a hydraulic closed circuit. Additionally, the invention can also be used as a hydraulic chucking device by constituting a plurality of the hydraulic cylinders of the rotating body, and by fitting jaws to each hydraulic cylinder.
B23B 5/08 - Machines ou dispositifs à tourner spécialement conçus pour un travail particulierAccessoires correspondants spécialement conçus à cet effet pour tourner des essieux, barres, tiges, tubes, cylindresTournage sans centre
B23B 31/10 - Caractérisés par les dispositifs de maintien ou de serrage ou par leurs moyens d'action directe
F16H 9/24 - Transmissions pour transmettre un mouvement rotatif à rapport de vitesse variable ou pour inverser un mouvement rotatif par des organes flexibles sans fin sans organes à mouvement orbital utilisant des chaînes, des courroies dentées, des courroies en forme de maillonsChaînes ou courroies spécialement adaptées à de telles transmissions
21.
Chamfering machine for providing optimal operation condition during operation of cutting surface of circular material and surface cutting method
Disclosed is a chamfering machine which enables a smooth cutting operation by allowing a workpiece to be fixed to a position corresponding to an optimal cutting condition. The chamfering machine comprises a cutting position groove, which is formed in the bottom surface of an upper guide, and into which a part of the outer circumferential surface of a workpiece is inserted, wherein the central part of the cutting position groove is formed to correspond to the cutting end of a chamfering cutter. The machining method is configured such that the chamfering cutter enters perpendicular to a centerline direction of a circular material and, after entering while cutting, to a point where the cutting end of a cutting tip is in line with the centerline, rotates a tubular material or revolves the chamfering cutter around the tubular material and thus can cut the surface of the circular material.
B23C 3/12 - Ébavurage ou finition des arêtes, p. ex. ébarbage des angles soudés
B23C 1/20 - Dispositifs ou machines portatifsDispositifs ou machines à commande manuelle
22.
DEVICE CAPABLE OF PROCESSING CIRCULAR OR ANGLED TUBE MEMBER OR ROD MEMBER INTO DESIRED SHAPE BY FREELY CONTROLLING CUTTING TOOL THROUGH WIRELESS COMMUNICATION
Disclosed is a device capable of processing a circular or angled tube member or rod member into a desired shape by freely controlling a cutting tool through wireless communication, the device being capable of performing not only cutting and beveling, but also processing various shapes using a single cutting tip, and also being capable of cutting and improving a tube member having a thickness of tens of millimeters or higher. A processing device according to the present invention comprises: a driving wheel which is rotatably coupled to one side of a body unit, and which penetrates a material to be processed; a main electric driving unit for rotating (C-axis direction) the driving wheel; at least one stage coupled to be able to reciprocate precisely in front of the driving wheel towards the center (X-axis direction) of the material to be processed; a cutting tool mounted on the stage to cut the outer surface of the material to be processed or a section part thereof; and a control unit for controlling the stage and the main electric driving unit, wherein the control unit and the stage are configured to make controls via wireless communication.
B23Q 15/00 - Commande automatique ou régulation du mouvement d'avance, de la vitesse de coupe ou de la position tant de l'outil que de la pièce
B23Q 17/00 - Agencements sur les machines-outils pour indiquer ou mesurer
B23C 3/00 - Fraisage de pièces particulièresOpérations de fraisage spécialesMachines à cet effet
H04L 12/28 - Réseaux de données à commutation caractérisés par la configuration des liaisons, p. ex. réseaux locaux [LAN Local Area Networks] ou réseaux étendus [WAN Wide Area Networks]
23.
CHAMFERING MACHINE FOR PROVIDING OPTIMAL OPERATION CONDITION DURING OPERATION OF CUTTING SURFACE OF CIRCULAR MATERIAL AND SURFACE CUTTING METHOD
Disclosed is a chamfering machine which enables a smooth cutting operation by allowing a workpiece to be fixed to a position corresponding to an optimal cutting condition during the operation of cutting the surface of a tubular material or bar material and which can also maximally prevent defect machining due to a primitive defect of a workpiece. The chamfering machine according to the present invention comprises a cutting position groove, which is formed in the bottom surface of an upper guide, and into which a part of the outer circumferential surface of a workpiece is inserted, wherein the central part of the cutting position groove is formed to correspond to the cutting end of a chamfering cutter. In addition, the machining method according to the present invention is configured such that the chamfering cutter enters perpendicular to a centerline direction of a circular material and, after entering while cutting, to a point where the cutting end of a cutting tip is in line with the centerline, rotates a tubular material or revolves the chamfering cutter around the tubular material and thus can cut the surface of the circular material.
