JP6592479B2 - Chamfering tool, tool support set and chamfering system - Google Patents

Description

  The present invention relates to a chamfering tool, a tool support set, and a chamfering system for chamfering an edge of an opening edge of a chamfering target hole formed in a workpiece.

  Conventionally, as this type of chamfering tool, one used in a state of being rotated at a high speed is known (for example, see Patent Document 1).

JP 2001-219347 A (FIG. 4, paragraph [0016])

  However, the above-described conventional chamfering tool needs to support and rotate a rotational drive source for rotating at a high speed together with the chamfering tool, and thus it is difficult to circulate.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a chamfering tool that can be easily operated, and a tool support set and a chamfering system that can easily operate the chamfering tool.

In order to achieve the above object, the invention of claim 1 is a chamfering tool for chamfering an opening edge of a chamfering target hole, wherein the support shaft and an end surface of the support shaft or a side surface from the support shaft are sideways. A blade portion having a rake face as a step surface of the step protrusion protruding to a rake face and a flank as an inclined surface connecting the side face of the support shaft or the side face of the step protrusion and the rake face. Has a curved blade line that swells away from the central axis of the support shaft, the blade line is inclined with respect to the axial direction of the support shaft, and has the support shaft on the tip side, A chamfering tool having a base shaft eccentric with respect to the support shaft .

The invention according to claim 6 is the chamfering tool according to any one of claims 1 to 5 , wherein an angle of intersection between the rake face and the flank face is an obtuse angle.

A seventh aspect of the present invention is the chamfering tool according to any one of the first to sixth aspects, wherein the rake face is inclined in a concave shape.

The invention of claim 2 is a chamfering tool for chamfering an opening edge of a chamfering target hole, and a stepped surface of a support shaft and a stepped protrusion protruding laterally from an end surface of the support shaft or the support shaft. A rake face, and a blade part having a flank as an inclined surface connecting the side face of the support shaft or the side face of the stepped protrusion and the rake face, and the blade part is a central axis of the support shaft. It has a blade muscle curved shape bulging to the side away from the blade muscle with is inclined with respect to the axial direction of the support shaft, a Bernoulli spiral der Ru ment tool.

The invention of claim 3 is a chamfering tool for chamfering an opening edge of a chamfering target hole, and a step surface of a support shaft and a step protrusion protruding laterally from the end surface of the support shaft or the support shaft. A rake face, and a blade part having a flank as an inclined surface connecting the side face of the support shaft or the side face of the stepped protrusion and the rake face, and the blade part is a central axis of the support shaft. has a blade muscle curved shape bulging to the side away from the blade muscle, the conjunction is inclined with respect to the axial direction of the support shaft, an arcuate helical der Ru surface preparative tools of uniform radius.

The invention of claim 4 is a chamfering tool for chamfering an opening edge of a chamfering target hole, and a stepped surface of a support shaft and a stepped protrusion protruding laterally from the end surface of the support shaft or the support shaft. A rake face, and a blade part having a flank as an inclined surface connecting the side face of the support shaft or the side face of the stepped protrusion and the rake face, and the blade part is a central axis of the support shaft. It has a blade muscle curved shape bulging to the side away from the blade muscle with is inclined with respect to the axial direction of the support shaft, an Archimedean spiral der Ru ment tool.

The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the pair of blade portions are provided on both sides in the axial direction of the support shaft in the common step protrusion. It is a chamfering tool.

According to a ninth aspect of the present invention, the stepped protrusions are arranged in pairs at two locations separated in the axial direction of the support shaft, and the blade portions are located at positions opposite to each other of the pair of stepped protrusions. a chamfering tool according to any one of claims 1 to 8 is arranged.

  The invention according to claim 10 is the invention according to any one of claims 1 to 9, wherein the pair of blade portions are arranged at two locations in the circumferential direction of the support shaft in the common step protrusion. This is a chamfering tool.

The invention according to claim 5 is a chamfering tool for chamfering an opening edge of a chamfering target hole, and a step surface of a support shaft and a step protrusion protruding laterally from the end surface of the support shaft or the support shaft. A rake face, and a blade part having a flank as an inclined surface connecting the side face of the support shaft or the side face of the stepped protrusion and the rake face, and the blade part is a central axis of the support shaft. A cutting edge having a curved shape that swells away from the support shaft, the cutting edge is inclined with respect to the axial direction of the support shaft, and the step protrusion is disposed at an intermediate position in the axial direction of the support shaft. , the tip of the support shaft is a surface winding tool taper portion that has been provided.

The invention according to claim 11 is a holder support portion that is rotatably supported, and a chamfering tool for chamfering the opening edge of the chamfering target hole, the support shaft, and an end surface of the support shaft or the support shaft. And a blade portion having a step surface of the step protrusion protruding sideways as a rake face and a flank as an inclined surface connecting the side surface of the support shaft or the side surface of the step protrusion and the rake surface. The blade portion has a curved cutting edge that swells away from the center axis of the support shaft, and the chamfering tool is inclined with respect to the axial direction of the support shaft; and the surface A tool holder supported by the holder support portion so as to hold the picking tool and the center axis of the support shaft is offset with respect to the rotation center axis of the holder support portion; The tool hole A holder support mechanism that supports the tool holder in a tiltable or movable manner, an urging means that urges the tool holder toward a side where the central axis of the support shaft moves away from the rotation central axis of the holder support portion, and the holder support portion. A positioning portion that is provided and abuts against the tool holder by the biasing of the biasing means, and positions the tool holder at an origin position where a rotation center axis of the holder support portion and a center axis of the support shaft are parallel to each other; A tool support set.
A twelfth aspect of the present invention is a holder support portion that is rotatably supported, and holds the chamfering tool according to any one of the first to tenth aspects, and is provided on a rotation center axis of the holder support portion. A tool holder that is supported by the holder support portion so that the center axis of the support shaft is offset with respect to the holder shaft, and a holder support mechanism that supports the tool holder so that the tool holder can tilt or move relative to the holder support portion. And an urging means for urging the tool holder to a side where the central axis of the support shaft is away from the rotation central axis of the holder support portion, and provided in the holder support portion, A positioning part that contacts the tool holder and positions the tool holder at an origin position where a rotation center axis of the holder support part and a center axis of the support shaft are parallel to each other; Which is a support set.

The invention of claim 13 supports the holder support portion of the tool support set according to claim 11 or 12 in a rotatable manner, the rotation center axis thereof coincides with the center axis of the chamfering target hole, and the rotation thereof. It is a chamfering system provided with a tool drive mechanism that moves linearly in the central axis direction.

[Inventions of Claims 1 to 5 ]
The chamfering tool according to claims 1 to 5 is held by a tool holder so that the central axis of the support shaft is eccentric with respect to the chamfering target hole, and moved in the direction of the central axis of the chamfering target hole. When the streak is brought into contact with the edge of the chamfering target hole, the blade streak obliquely intersects the edge when viewed from the central axis direction of the chamfering target hole or the radial direction. In this state, when the tool holder is moved in the central axis direction of the chamfering target hole and the blade portion is pressed against the edge of the chamfering target hole, the edge is cut. In addition, the chamfering tool tilts or moves in the radial direction of the chamfering target hole when the flank rides on the cut surface, and the portion of the blade line that cuts into the edge moves, and the blade portion of the edge The position where the is cut also moves. Then, move the chamfering tool around the central axis while moving the chamfering tool in the direction of the central axis of the chamfering target hole, or move the chamfering tool to the opening edge of the chamfering target hole in the central axis direction of the chamfering target hole. The operation of rotating the chamfering tool around the central axis of the hole to be chamfered while repeating the operation of approaching and separating can be performed to chamfer the edge of the entire circumference of the hole to be chamfered. . Thus, in the chamfering tool of the present invention, the edge of the opening edge of the chamfering target hole can be chamfered without using a drive source that rotates the chamfering tool at a high speed. That is, the chamfering tool can be easily handled.

[Invention of claim 6 ]
In the chamfering tool according to the sixth aspect, since the crossing angle between the rake face and the flank face is an obtuse angle, the strength can be ensured.

[Invention of Claim 7 ]
In the chamfering tool according to the seventh aspect, since the rake face is inclined in a concave shape, it is easy to secure a rake angle.

[Invention of Claim 1 ]
Since the chamfering tool according to claim 1 has a base shaft that is eccentric with respect to the support shaft, the chamfering tool is simply rotated about the central axis of the base shaft with the support shaft being directed to the edge. The entire edge can be cut.

[Inventions of Claims 2 to 4 ]
Examples of the shape of the blade line include Bernoulli spiral (invention of claim 2 ), arc spiral (invention of claim 3 ), Archimedes spiral (invention of claim 4 ), and involute spiral.

[Invention of Claim 8]
The chamfering tool according to claim 8 is provided with a pair of blade portions on both sides in the axial direction of the support shaft in the common step protrusion, so that the support shaft approaches the chamfering target hole from the outside of the chamfering target hole. Then, the edge of the opening edge can be chamfered, or the edge of the opening edge of the chamfering target hole can be chamfered through the support shaft inside the chamfering target hole.

[Invention of claim 9]
In the chamfering tool according to claim 9, the stepped protrusions are provided at two positions apart from the support shaft, and the pair of blade portions are disposed at the mutually opposed positions of the pair of stepped protrusions, so that the workpiece is penetrated. The edge of the opening edge of the both ends of the chamfering target hole to be chamfered can be efficiently chamfered.

[Invention of Claim 10]
According to the structure of the chamfering tool of the tenth aspect, even if the outer surface of the workpiece is inclined with respect to the axial direction of the chamfering target hole, the chamfering can be efficiently performed.

[Invention of claim 5 ]
According to the chamfering tool of the fifth aspect , the tip end portion of the support shaft can be easily inserted into the chamfering target hole by guiding the taper portion of the support shaft.

[Inventions of Claims 11 to 13]
According to the tool support set and the chamfering system of claims 11 to 13, the edge of the opening edge of the chamfering target hole can be chamfered without using a drive source that rotates the chamfering tool at a high speed. That is, the chamfering tool can be easily handled.

The perspective view of the chamfering tool which concerns on 1st Embodiment of this invention. Enlarged sectional view of the step protrusion Enlarged sectional view of the step protrusion The perspective view of the front-end | tip part of the chamfering tool which is chamfering the one end part of a chamfering object hole Fig. 2 is a cross-sectional plan view of the chamfering tool taken along the line AA in Fig. 2. Conceptual diagram of chamfering system Flat section of chamfering tool and workpiece Flat section of chamfering tool and workpiece The perspective view of the front-end | tip part of the chamfering tool which is chamfering the other end part of a chamfering object hole Plan view of the chamfering tool of the second embodiment The perspective view of the chamfering tool of 3rd Embodiment FIG. 9 is a cross-sectional plan view of the chamfering tool along the BB cut surface in FIG. Side view of the tip of the chamfering tool Side view of the tip of the chamfering tool Perspective view of workpiece and chamfering tool Plan view of the tip of a chamfering tool according to a modification Plan view of the tip of a chamfering tool according to a modification

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1A, in the chamfering tool 10 of this embodiment, an intermediate shaft 12 extends coaxially with the tip of a base shaft portion 11 (corresponding to the “base shaft” of the present invention), and the tip of the intermediate shaft 12 The support shaft 13 extends from the eccentric position. The base shaft portion 11, the intermediate shaft 12, and the support shaft 13 all have a round bar shape with a circular cross section, and the diameter is reduced stepwise in the order of the base shaft portion 11, the intermediate shaft 12, and the support shaft 13.

  Hereinafter, the central axis of the base shaft portion 11 and the intermediate shaft 12 is referred to as “first central axis J1”, and the central axis of the support shaft 13 is referred to as “second central axis J2”.

  A taper portion 13T is provided at the distal end portion of the support shaft 13, and a step projection 20 is provided at a position closer to the distal end. As shown in FIG. 2, the step protrusion 20 protrudes from the side surface of the support shaft 13 in a stepped shape.

  As shown in FIGS. 1B and 1C, the step protrusion 20 includes a side surface 20S and step surfaces 20D and 20D. The intersection angle θ1 between the step surfaces 20D and 20D and the side surface 13M of the support shaft 13 is an acute angle, and the step surfaces 20D and 20D are inclined in a concave shape with respect to the second central axis J2 of the support shaft 13. . The side surface 20S of the stepped protrusion 20 includes a first side surface 20A and a pair of second side surfaces 20B and 20B. The first side surface 20A is parallel to the axial direction of the support shaft 13 (that is, the axial direction of the second central axis J2). The second side surface 20B is inclined so as to approach the support shaft 13 from the upper and lower ends of the first side surface 20A. The intersection angle θ2 between the first side surface 20A and the second side surface 20B is an obtuse angle.

  In the chamfering tool 10 of the present embodiment, part of the ridge lines 20R and 20R where the step surfaces 20D and 20D and the second side surfaces 20B and 20B intersect among the step protrusions 20 are defined as blade streaks 21S and 21S. Blade portions 21 and 21 (FIG. 2) are provided. Further, the intersection angle θ3 between the step surfaces 20D and 20D and the second side surfaces 20B and 20B is an obtuse angle.

  In the following description, when the blade portions 21 and 21 are distinguished, the blade portion 21 on the distal end side of the support shaft 13 in the stepped protrusion 20 is referred to as a first blade portion 21 and the blade portion 21 on the opposite side thereof. Is referred to as a second blade portion 21. Moreover, as shown in FIG. 2, these 1st and 2nd blade parts 21 and 21 have comprised the symmetrical shape.

  Specifically, as shown in FIG. 3, the side closer to the first central axis J1 is the first intersection between the first reference line L1 and the side surface 20S orthogonal to the first central axis J1 and the second central axis J2. Assuming that the intersection P1 and the far side are the second intersection P3, the distance from the second central axis J2 to the side surface 20S of the step protrusion 20 is slightly on the left side of FIG. 3 from the first reference line L1 with respect to the first intersection P1. The second position P2 is the smallest at the first position P2 that is shifted to, and the largest at the second position P4 that is slightly shifted to the left in FIG. 3 from the first reference line L1 with respect to the second intersection P3. Then, both the side surface 20S of the right step protrusion 20 in FIG. 3 from the first position P2 to the second position P4 and the side surface 20S of the left step protrusion 20 on the opposite side swell outward, and second It is curved so that the distance from the first central axis J1 increases as it approaches the position P4.

  Here, as for the chamfering tool 10 of this embodiment, a part of ridgeline 20R, 20R is a Bernoulli spiral. Specifically, the ridge lines 20R and 20R are from the first position P2 to the intermediate position P5 before the second intersection point P3 in the right side of FIG. 3 when the ridge line 20R is viewed from the axial direction of the second central axis J2. Is a Bernoulli curve. The ridgelines 20R and 20R are separated from each other in the axial direction of the first central axis J1 as the position is closer to the first central axis J1 (that is, closer to the first position P2), and the farther from the first central axis J1 (that is, closer to the first central axis J1). The closer to the second position P4, the closer to each other in the axial direction of the first central axis J1, and the slanted extension with respect to the second central axis J2 (FIG. 1). That is, a part of the ridge lines 20R, 20R is a Bernoulli spiral in which a Bernoulli curve is inclined with respect to the second central axis J2 and extends spirally. The intermediate position P5 to the second position P4 are curves closer to the second central axis J2 side than the Bernoulli curve, and are continuous with the Bernoulli curve to the intermediate position P5. Further, the right side surface 20S and the left side surface 20S are smoothly continuous at the second position P4.

  Of these ridgelines 20R and 20R, the blade streaks 21S and 21S of the blade portions 21 and 21 are between the intermediate position P6 and the second position P4 in the right portion of FIG. Further, as shown in FIG. 2, the portion corresponding to the blade stripe 21S of the stepped surface 20D forms the rake face 23 of each blade portion 21, while the blade stripe 21S of the second side surface 20B constituting the side surface 20S. The corresponding part is the flank 24 of the blade part 21. As shown in FIG. 3, the intermediate position P6 is formed by, for example, tilting the second reference line L2 orthogonal to the first reference line L1 and the second central axis J2 in the counterclockwise direction in FIG. It is a position that intersects.

  In FIG. 4, a chamfering system 41 including the chamfering tool 10 is partially conceptualized. The chamfering system 41 includes a 6-axis vertical articulated robot 40 as a “tool driving mechanism” according to the present invention. A tool holding set 30S is attached to the front end flange 40F of the robot 40. The tool support set 30S includes a holder support portion 33 attached to the front end flange 40F of the robot 40, and a tool holder 30 according to the present invention, which is supported by the holder support portion 33 and to which the chamfering tool 10 is fitted and fixed. Have. The holder support portion 33 is attached to the tip flange 40F of the robot 40 so as to be rotatable about the rotation center axis J0, and the tool holder 30 is attached to the holder support portion 33 so as to be tiltable.

  The tool holder 30 has, for example, a structure in which a connecting protrusion 32 projects from one end surface of a cylindrical body 31 having one end. The inner side of the cylindrical body 31 is a tool fitting hole 31A, and the base shaft portion 11 of the chamfering tool 10 is fitted and fixed thereto. Moreover, the front-end | tip part of the connection protrusion 32 comprises a semicircle shape, and 32 A of pin holes are penetrated and formed in the center part of the semicircle-shaped arc.

  The holder support portion 33 includes, for example, a rectangular parallelepiped support portion main body 33S at the center of the front side surface of the disc-shaped mounting flange 33F. Then, the holder support portion 33 is attached in a state where the rear side surface of the attachment flange 33F is overlapped with the tip flange 40F of the robot 40 and is centered.

  The support portion body 33S is provided with an internal space 33K that opens to the opposite side of the mounting flange 33F. A pair of first side walls 33A and 33A facing each other in the direction orthogonal to the paper surface of FIG. 4 across the internal space 33K in the support portion main body 33S (FIG. 4 shows one first side wall 33A). Is substantially the same as the thickness of the connecting protrusion 32 described above. On the other hand, the distance between the second side walls 33B and 33B facing each other in the left-right direction in FIG. 4 with the internal space 33K interposed therebetween is larger than the lateral width of the connecting projection piece 32 described above.

  In the pair of first side walls 33A, 33A, support holes (not shown) that are orthogonal to the central axis of the mounting flange 33F are formed at positions farther from the opening of the internal space 33K. Then, the connecting protrusion 32 of the tool holder 30 is received in the internal space 33K, and the support pin 39 is inserted into the support hole and the pin hole 32A of the connecting protrusion 32, whereby the tool holder 30 tilts to the holder support portion 33. Supported as possible. The “holder support mechanism” of the present invention is configured by a support hole (not shown) formed in each first side wall 33 </ b> A, the pin hole 32 </ b> A of the connecting protrusion 32, and the support pin 39.

  Further, a stopper protrusion 34 (corresponding to the “positioning portion” of the present invention) is formed on the inner surface of one second side wall 33B in the vicinity of the opening of the internal space 33K, and the connecting protrusion 32 is formed on the stopper protrusion 34. By abutting, the tool holder 30 is positioned at the origin position where the center axis of the tool fitting hole 31A and the center axis of the mounting flange 33F (that is, the rotation center axis J0) coincide.

  Furthermore, a plunger support hole 35 is formed on the other second side wall 33B at a position facing the stopper projection 34, and a plunger 36 is accommodated therein so as to be capable of linear movement. Further, the outer surface side end portion of the holder support portion 33 in the plunger support hole 35 is closed by a lid body 38, and a compression coil spring 37 (corresponding to “biasing means” of the present invention) is provided between the lid body 38 and the plunger 36. Is housed). As a result, the plunger 36 is pressed against the coupling protrusion 32 and is biased so that the tool holder 30 is held at the origin position, and tilting toward the plunger 36 is allowed.

  When the chamfering tool 10 is attached to the tool holder 30, the tilting central axis of the tool holder 30 (that is, the central axis of the support pin 39) and the second reference line L2 described above are arranged in parallel, and the second The central axis J2 is disposed on the stopper protrusion 34 side with respect to the first central axis J1.

  The description regarding the configuration of the chamfering tool 10, the tool support set 30S, and the chamfering system 41 of the present embodiment has been described above. Next, a case where the chamfering system 41 is used to chamfer both opening edges of the chamfering target hole 91 formed in the workpiece 90 by teaching playback of the robot 40 will be described. The chamfering target hole 91 passes through the workpiece 90 in a state orthogonal to the outer surface of the workpiece 90. Further, the chamfering target hole 91 has a size that allows chamfering to be performed in a state where the first central axis J1 of the chamfering tool 10 of the present embodiment is superimposed on the central axis.

  The robot 40 is made to remember the following operations by teaching. First, the chamfering tool 10 is advanced in the axial direction of the first central axis J1 in a state where the first central axis J1 of the chamfering tool 10 is overlapped with the central axis of the chamfering target hole 91. Then, as shown in FIG. 5A, the edge 93 on one end side of the chamfering object hole 91 abuts in the vicinity of the intermediate position P6 of the first blade portion 21, so that the chamfering tool is set at the initial position. 10 is rotated 365 degrees around the first central axis J1 and is advanced to the chamfering object hole 91 side in parallel with the first central axis J1. The rotation direction of the chamfering tool 10 at that time is set from the initial contact position where the first blade portion 21 first contacts the edge 93 toward the second position P4. Further, the amount of movement of the first central axis J1 in the axial direction is the direction of the first central axis J1 when moving from the initial contact position to the second position P4 along the blade line 21S of the first blade portion 21. Set the distance at.

  Next, the chamfering tool 10 is translated so that the step protrusion 20 is separated from the inner surface of the chamfering target hole 91, and the surface of the step protrusion 20 reaches the position where it passes through the chamfering target hole 91 as shown in FIG. 7. The take tool 10 is advanced. Then, in a state where the first central axis J1 of the chamfering tool 10 is overlapped with the central axis of the chamfering target hole 91, the chamfering tool 10 is retracted in the axial direction of the first central axis J1, and the second blade portion 21 is brought into contact with the edge 93 on the other end side of the chamfering target hole 91. Hereinafter, in the same manner as teaching to the edge 93 on one end side of the chamfering target hole 91, the chamfering tool 10 is rotated 365 degrees around the first central axis J1, while the first central axis J1 is rotated. Parallel to the chamfering object hole 91 side. Then, the chamfering tool 10 is separated from the chamfering target hole 91 after the chamfering tool 10 is translated so that the stepped protrusion 20 is separated from the inner surface of the chamfering target hole 91.

  When the teaching operation as described above is played back, the chamfering tool 10 moves in the axial direction of the first central axis J1, and the blade stripe 21S of the first blade portion 21 is the edge 93 on one end side of the chamfering target hole 91. Abut. At this time, the blade stripe 21S can be viewed from the axial direction of the first central axis J1 (see FIG. 5A) or from the rotational radius direction orthogonal to the first central axis J1 (see FIG. 2). The edge 93 is crossed obliquely.

  In this state, when the chamfering tool 10 moves in the axial direction of the first central axis J1, the first blade portion 21 is pressed against the edge 93 of the chamfering target hole 91, and the edge 93 is cut. At this time, the first step surface 20D of the first blade portion 21 becomes the rake face 23, the second side face 20B becomes the flank face 24, and the edge 93 is cut.

  Then, when the flank 24 of the first blade portion 21 rides on the cut surface, the chamfering tool 10 tilts in the half rotation direction and the portion of the blade 21S cut into the edge 93 moves, A portion of the edge 93 where the first blade portion 21 is cut also moves. At this time, the chamfering tool 10 also rotates around the first central axis J1 while moving in the axial direction of the first central axis J1, so that the first blade portion 21 of the edge 93 is also cut. The part is moving.

  Then, as shown in FIGS. 5A to 5E, the edge 93 is chamfered over the entire circumference of the chamfering target hole 91, and the side surface 20 </ b> S of the step protrusion 20 is finally chamfered. It becomes the state made into the inner surface of 91. In FIG. 6, FIGS. 5A to 5E are overlapped. 5 and 6, the distance between the first central axis J1 and the second central axis J2 shown in FIG. 1 is increased in order to make the movement of the chamfering tool 10 easier to understand.

  Next, as shown in FIG. 7, the chamfering tool 10 moves forward, the stepped protrusion 20 moves backward after passing through the chamfering target hole 91, and the blade streak 21 </ b> S of the second blade part 21 becomes the chamfering target hole. 91 abuts against the edge 93 on the other end side. Then, the chamfering tool 10 is chamfered after the edge 93 on the other end side is chamfered by the second blade portion 21 in the same manner as the case where the first blade portion 21 chamfers the edge 93 on one end side. Detach from hole 91.

  Thus, according to the chamfering tool 10, the tool support set 30S, and the chamfering system 41 of the present embodiment, the opening edge 92 of the chamfering target hole 91 is used without using a drive source that rotates the chamfering tool 10 at a high speed. The edge 93 can be chamfered. That is, the chamfering tool 10 can be easily handled, and the edge 93 of the chamfering target hole 91 can be chamfered with less energy than conventional. Further, since most of the shape of the blade streaks 21S is Bernoulli spiral, any position of the blade streaks 21S in contact with the edge 93 of the chamfering target hole 91 in the range of the Bernoulli spiral is chamfered. The angle of the blade stripe 21S with respect to the edge 93 of the hole 91 is constant. Thereby, the chamfering shape in the circumferential direction of the chamfering target hole 91 is made uniform.

  Furthermore, since the chamfering tool 10 includes the blade portions 21 on both sides of the common step protrusion 20 in the axial direction of the first central axis J1, as described above, the support shaft is provided from the outside of the chamfering target hole 91. 13 can be made to approach the chamfering target hole 91 to chamfer the edge 93 of the opening edge 92, or the edge 93 of the opening edge 92 of the chamfering target hole 91 through the support shaft 13 inside the chamfering target hole 91. Can be chamfered. Further, since the flank 24 is an inclined surface, the flank 24 can easily climb onto the edge 93 after processing.

  The chamfering tool 10 of the present embodiment can easily insert the tip end portion of the support shaft 13 into the chamfering target hole 91 by guiding the tapered portion 13T of the support shaft 13. Further, since the crossing angle between the rake face 23 and the flank face 24 is an obtuse angle, the strength of the blade portion 21 can be ensured. Furthermore, since the rake face 23 is inclined concavely, it is easy to secure a rake angle.

  Furthermore, since the chamfering tool 10 of the present embodiment has a structure in which the stepped portion 20 that protrudes laterally from the support shaft 13 is provided with the blade portion 21, the side surface of the support shaft 13 is chamfered on the chamfering target hole 91. It is possible to easily determine the position where the blade stripe 21S and the edge 93 of the chamfering target hole 91 are in contact with each other. In addition, the tip of the support shaft 13 can be easily inserted into the chamfering target hole 91 by guiding the tapered portion 13 </ b> T of the support shaft 13.

  When the chamfering tool 10 is linearly moved in the axial direction of the first central axis J1 with the first central axis J1 of the chamfering tool 10 overlapped with the central axis of the chamfering target hole 91, the first central axis J1 is overlapped. When the blade portion 21 and the edge 93 of the chamfering target hole 91 do not come into contact with each other, teaching may be performed as follows. That is, after the front end portion of the support shaft 13 has entered the chamfering target hole 91, the chamfering tool 10 is moved in the direction of the first reference line L1, and the side surface of the support shaft 13 is moved as shown in the upper right of FIG. It is made to contact | abut to the internal peripheral surface of the chamfering object hole 91. FIG. And it moves to the axial direction of the 1st central axis J1, and makes the 1st blade part 21 contact | abut to the edge 93 of the one end side of the chamfering object hole 91. FIG. In this state, the chamfering tool 10 may be moved straight while rotating the chamfering tool 10 with the central axis of the chamfering target hole 91 as the rotation center axis. Thereby, the edge 93 of the chamfering object hole 91 can be chamfered in the same manner as described above.

[Second Embodiment]
The chamfering tool 10V of this embodiment is shown in FIG. 8, and the support shaft 13 is longer than the chamfering tool 10 of the first embodiment. Step protrusions 50 and 51 are provided at two positions close to each other. And the blade parts 21 and 21 are provided in the mutually opposing position of these level | step difference protrusions 50 and 51. As shown in FIG. Also by the configuration of the chamfering tool 10V of the present embodiment, the edges 93 at both ends of the chamfering target hole 91 penetrating the workpiece 90 can be efficiently chamfered.

[Third Embodiment]
The chamfering tool 10W of this embodiment is shown in FIGS. As shown in FIG. 9, the chamfering tool 10 </ b> W of the present embodiment has a structure in which a support shaft 59 is provided coaxially with the tip end of the base shaft portion 11, and the step protrusion 60 protrudes from a position near the tip of the support shaft 59. There is no. When viewed from the axial direction of the first central axis J3, which is the central axis of the base shaft portion 11 and the support shaft 59, as shown in FIG. 10, the stepped protrusion 60 is offset from the first central axis J3. It has a circular shape centered on the central axis J4. A circle that is the side surface 59S of the support shaft 59 is inscribed in a circle that is the side surface 60S of the stepped protrusion 60.

  Here, if the position of the side surface 59S of the support shaft 59 that is 180 degrees away from the inscribed position is the first reference position P8, the two ridge lines 60R and 60R of the stepped protrusion 60 are as shown in FIG. As shown in FIG. 12, the distance from the first reference position P8 is parallel to each other, as shown in FIG. Further, as shown in FIG. 10, the step protrusion 60 is symmetrical with respect to the third reference line L3 orthogonal to the inscribed position and the first reference position P8, and as shown in FIG. The shape is also symmetric in the direction. In the ridge line 60R, the step protrusion 60 is provided with four blade portions 61 having four spiral curve portions symmetrically arranged in both the circumferential direction and the axial direction of the step protrusion 60 as the blade lines 61S. .

  According to the chamfering tool 10W of the present embodiment, either an operation of moving forward or backward while rotating the chamfering tool 10W clockwise, or an operation of moving forward or backward while rotating the chamfering tool 10W counterclockwise. Chamfering can also be performed. Thereby, for example, when the outer surface of the workpiece 90 is inclined with respect to the axial direction of the chamfering target hole 91, or as shown in FIG. Even when the opening of the hole 91 is formed, the edge 93 of the chamfering target hole 91 can be easily chamfered. In that case, the operation of making the chamfering tool 10W approach and separate from the opening edge 92 of the chamfering target hole 91 in the direction of the rotation center axis is repeated, and the chamfering tool 10W is rotated about the rotation center axis while being separated. The operation may be performed to chamfer the edge 93 of the entire circumference of the chamfering target hole 91.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various modifications are possible within the scope of the invention other than the following. It can be changed and implemented.

  (1) The chamfering tools 10, 10 </ b> V, and 10 </ b> W of the above embodiment are arranged so that the first central axis J <b> 1 of the base shaft portion 11 and the intermediate shaft 13 and the second central axis J <b> 2 of the support shaft 13 are misaligned. However, the first central axis J1 and the second central axis J2 may be coaxial. In this case, it is only necessary that the second central axis J2 is arranged so as to be eccentric with respect to the rotation axis. For example, the central axis of the tool fitting hole 31A is arranged eccentrically with respect to the central axis of the mounting flange 33F. May be.

  (2) As long as the chamfering tools 10, 10 </ b> V, and 10 </ b> W can be tilted toward the first central axis J <b> 1, the configuration is not limited to the above embodiment, and other configurations may be used. For example, a tool holder disclosed in Japanese Patent No. 5550187 may be used.

  (3) In the above embodiment, the tip of the support shaft 13 (tapered portion 13T) is formed in a tapered shape that narrows toward the tip, but the tip may be formed in a hemispherical shape. However, it may be formed in a cylindrical shape having the same diameter as the support shaft 13.

  (4) As shown to FIG. 14 (A), it is good also as a structure which does not provide the taper part 13T at the front-end | tip of the support shaft 13X. Further, as shown in FIG. 14B, the support shaft 13S stepped protrusion 20 may not be provided, and a blade line 21S may be formed at the tip of the support shaft 13S.

  (5) In the above embodiment, the tapered portion 13T has a conical shape with the center of the support shaft 13 as a tip. However, as shown in FIG. 15, the tip of the tapered portion 13T has a center of the base shaft portion 11. The tip may be an eccentric cone shape.

  (6) Although the crossing angle between the second side surface 20B of the step protrusion 20 and the step surfaces 20D and 20D of the step protrusion 20 is an obtuse angle in the above embodiment, it may be an acute angle.

  (7) In the above embodiment, the side surface 20S of the stepped protrusion 20 is composed of the first side surface 20A and the second side surfaces 20B, 20B, but the side surface 20S does not have the second side surfaces 20B, 20B. There may be. At this time, a ridge line where the first side surface 20A and the step surface 20D intersect becomes a blade line. At that time, the crossing angle between the first side surface 20A of the step protrusion 20 and the step surface 20D may be an obtuse angle or an acute angle.

  (8) In the above embodiment, as shown in FIG. 1B, the first side surface 20 </ b> A of the step protrusion 20 extends in parallel with the second central axis of the support shaft 13, but the first side surface 20 </ b> A of the step protrusion 20. May be inclined or curved with respect to the second central axis J2. When the second side surface 20A extends while being inclined or curved, the first side surface 20A approaches the support shaft 13 as it approaches the end of the stepped protrusion 20 in the axial direction of the second central axis J2. It is preferable.

  (9) In the above-described embodiment, the Bernoulli spiral is illustrated as the shape of the blade stripe 21S. However, for example, an arc spiral, an Archimedean spiral, and an involute spiral may be used.

10, 10V, 10W Chamfering tool 13, 59 Support shaft 13T Taper part 20, 50, 51, 60 Step protrusion 20R, 60R Ridge 21, 61 Blade part 21S, 61S Blade line 23 Rake face 24 Relief face 30 Tool holder 33 Holder support part 34 Stopper protrusion (positioning part)
37 Compression coil spring (biasing means)
40 Robot (Tool drive mechanism)
41 Chamfering system 90 Workpiece 91 Chamfering target hole 92 Open edge 93 Edge

Claims (13)

A chamfering tool for chamfering an opening edge of a chamfering target hole,
A support shaft;
Wherein from the end face or the support shaft of the support shaft and the stepped surface a rake face of the step projections projecting laterally, a side or sides an inclined surface flank to contact with the rake face of the stepped protrusion of the support shaft anda blade portion to,
The blade portion has a curved blade line that swells to the side away from the central axis of the support shaft,
The blade line is inclined with respect to the axial direction of the support shaft ;
A chamfering tool having the support shaft on the distal end side and a base shaft eccentric with respect to the support shaft . A chamfering tool for chamfering an opening edge of a chamfering target hole,
A support shaft;
The end surface of the support shaft or the stepped surface of the stepped protrusion protruding laterally from the support shaft is a rake face, and the side surface of the support shaft or the inclined surface connecting the side face of the stepped protrusion and the rake face is a flank. And a blade part
The blade portion has a curved blade line that swells to the side away from the central axis of the support shaft,
The chamfering tool is a chamfering tool that is inclined with respect to the axial direction of the support shaft and is a Bernoulli spiral. A chamfering tool for chamfering an opening edge of a chamfering target hole,
A support shaft;
The end surface of the support shaft or the stepped surface of the stepped protrusion protruding laterally from the support shaft is a rake face, and the side surface of the support shaft or the inclined surface connecting the side face of the stepped protrusion and the rake face is a flank. And a blade part
The blade portion has a curved blade line that swells to the side away from the central axis of the support shaft,
The chamfering tool is a chamfering tool that is inclined with respect to the axial direction of the support shaft and is a circular spiral having a uniform radius. A chamfering tool for chamfering an opening edge of a chamfering target hole,
A support shaft;
The end surface of the support shaft or the stepped surface of the stepped protrusion protruding laterally from the support shaft is a rake face, and the side surface of the support shaft or the inclined surface connecting the side face of the stepped protrusion and the rake face is a flank. And a blade part
The blade portion has a curved blade line that swells to the side away from the central axis of the support shaft,
The chamfering tool is a chamfering tool that is inclined with respect to the axial direction of the support shaft and is an Archimedean spiral. A chamfering tool for chamfering an opening edge of a chamfering target hole,
A support shaft;
The end surface of the support shaft or the stepped surface of the stepped protrusion protruding laterally from the support shaft is a rake face, and the side surface of the support shaft or the inclined surface connecting the side face of the stepped protrusion and the rake face is a flank. And a blade part
The blade portion has a curved blade line that swells to the side away from the central axis of the support shaft,
The blade line is inclined with respect to the axial direction of the support shaft;
The step protrusion is disposed at an intermediate position in the axial direction of the support shaft,
A chamfering tool provided with a tapered portion at a tip of the support shaft. The chamfering tool according to any one of claims 1 to 5, wherein an intersection angle between the rake face and the flank face is an obtuse angle. The chamfering tool according to any one of claims 1 to 6, wherein the rake face is inclined in a concave shape. The chamfering tool according to any one of claims 1 to 7, wherein the pair of blade portions are provided on both sides in the axial direction of the support shaft in the common step protrusion. 2. The step protrusions are arranged in pairs at two locations separated in the axial direction of the support shaft, and the blade parts are disposed at positions facing each other of the pair of step protrusions. A chamfering tool according to any one of claims 1 to 8.   The chamfering tool according to any one of claims 1 to 9, wherein the pair of blade portions are disposed at two locations in the circumferential direction of the support shaft in the common step protrusion. A holder support that is rotatably supported;
A chamfering tool for chamfering an opening edge of a chamfering target hole, wherein the support shaft and a stepped surface of a stepped protrusion projecting laterally from the end surface of the support shaft are used as a rake face, and the support A blade portion having a flank as an inclined surface connecting the side surface of the shaft or the side surface of the step protrusion and the rake surface, and the blade portion is curved to bulge away from the center axis of the support shaft. A chamfering tool having a shaped blade and the blade being inclined with respect to the axial direction of the support shaft;
A tool holder that holds the chamfering tool and is supported by the holder support so that a center axis of the support shaft is offset with respect to a rotation center axis of the holder support;
A holder support mechanism that supports the tool holder in a tiltable or movable manner with respect to the holder support part;
A biasing means for biasing the tool holder toward a side where the central axis of the support shaft is away from the rotation central axis of the holder support;
The tool holder is provided at the holder support portion, abuts on the tool holder by the biasing of the biasing means, and the tool holder is placed at an origin position where the rotation center axis of the holder support portion and the center axis of the support shaft are parallel to each other. A positioning unit for positioning, and a tool support set provided. A holder support that is rotatably supported;
11. The holder so that the chamfering tool according to any one of claims 1 to 10 is held and the center axis of the support shaft is offset with respect to the rotation center axis of the holder support portion. A tool holder supported by the support part;
A holder support mechanism that supports the tool holder in a tiltable or movable manner with respect to the holder support part;
A biasing means for biasing the tool holder toward a side where the central axis of the support shaft is away from the rotation central axis of the holder support;
The tool holder is provided at the holder support portion, abuts on the tool holder by the biasing of the biasing means, and the tool holder is placed at an origin position where the rotation center axis of the holder support portion and the center axis of the support shaft are parallel to each other. A positioning unit for positioning, and a tool support set provided. The holder support part of the tool support set according to claim 11 or 12 is rotatably supported, and the rotation center axis thereof coincides with the center axis of the chamfering target hole, and is linearly moved in the rotation center axis direction. A chamfering system comprising a tool driving mechanism.

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