JP7262820B2 - Chip holder, deburring tool, deburring device and deburring method - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a tip holder that holds a deburring tip at the tip of a shaft portion, a deburring tool, a deburring device, and a deburring method having the deburring tip in the tip holder.

As a conventional tip holder, there is known one to which a deburring tip can be detachably attached (see, for example, Patent Documents 1 and 2).

Japanese Utility Model Laid-Open No. 05-012031 (Fig. 1, paragraphs [0005], [0006]) WO 03/006194 pamphlet

However, in the above-mentioned conventional tip holder, the tip of the shaft portion is enlarged by the bolt that fixes the deburring tip, and interference with the workpiece may become a problem. Development is required.

A first aspect of the invention, which has been made to solve the above-mentioned problems, is a tip holder in which a shaft portion extends from a base portion held by a tool holding portion of an actuator, and a tip portion of the shaft portion holds a deburring tip. a tip fitting hole that opens on the side surface of the distal end portion of the shaft portion and into which a portion of the deburring tip is fitted; a rod inserted into the rod insertion hole and abutted against the deburring tip; a female screw portion formed at the end of the rod insertion hole on the base portion side; and the rod and a male screw that is provided separately or integrally and is screwed into the female screw portion , and the cross-sectional shape of the shaft portion is a semicircle centered on the central axis of the base portion and the semicircle. and an isosceles trapezoid rising diagonally in a direction approaching each other from both ends of the linear portion of and having a height smaller than the radius of the semicircle,
The tip fitting hole penetrates the shaft portion so as to open at a center position in the width direction of the upper side of the isosceles trapezoid and at a position opposite to the center position across the central axis of the base portion. A tip holder.

The invention according to claim 2 is the tip holder according to claim 1, wherein the male screw is a bolt provided separately from the rod.

The invention of claim 3 is the tip holder according to claim 1 or 2, wherein the rod insertion hole extends along the central axis of the base portion.

According to a fourth aspect of the present invention, there is provided the tip holder according to any one of the first to third aspects, wherein the cross-sectional shape of the tip fitting hole is an elliptical shape extending in the axial direction of the shaft portion. be.

According to a fifth aspect of the invention, there is provided a deburring tool comprising a tip holder having a shaft extending from a base portion held by a tool holding portion of an actuator, and a deburring tip held at the tip of the shaft portion. The tip holder has a tip fitting hole that is open on a side surface of the distal end of the shaft portion and into which a part of the deburring tip is fitted, and a tip fitting hole that extends from the base end surface of the base portion. a rod insertion hole that penetrates to the inner surface of the joint hole; a rod that is inserted into the rod insertion hole and abutted against the deburring tip; A threaded portion and a male thread provided separately or integrally with the rod and screwed into the female threaded portion are provided, and the deburring tip has a portion to be fitted into the tip fitting hole . and a head portion that protrudes from the side surface of the shaft portion, a stepped surface that contacts the opening edge of the tip fitting hole is provided.
According to the sixth aspect of the invention, the cross-sectional shape of the shaft portion is a semicircle centered on the central axis of the base portion, and straight portions of the semicircle rise obliquely in directions approaching each other from both ends of the semicircle. and an isosceles trapezoid having a height smaller than the radius of the isosceles trapezoid. 6. The deburring tool according to claim 5, which penetrates the shaft portion so as to open at positions opposite to each other across the central axis of the shaft.

In the seventh aspect of the invention, the head portion is provided with a triangular projecting piece having a triangular tip edge portion that fits in a plane parallel to the axial direction of the shaft portion and projects sideways from the side surface of the shaft portion. 7. The deburring tool according to claim 5 or 6.

According to the invention of claim 8, the cross-sectional shape of the shaft fitting portion and the cross - sectional shape of the tip fitting hole are both oval shapes extending in the axial direction of the shaft portion. It is a deburring tool according to claim 1 or 1 .

According to a ninth aspect of the invention, there is provided a deburring device comprising: the deburring tool according to any one of the fifth to eighth aspects; and the actuator for rotationally driving the tool holding portion, wherein the shaft portion has a shape having a flat cut surface parallel to the central axis by cutting a part from a round bar centered on the central axis of the base portion, and the deburring tip is the cut surface of the shaft portion. The tool holding part has a mounting hole in which the base part is fitted, and the shaft part and the deburring In the deburring device, the mounting hole is eccentric from the rotation center of the tool holding part so that the tip of the deburring tip is arranged at a position farthest from the rotation center of the tool holding part. .

According to a tenth aspect of the invention, there is provided a deburring method using the deburring device of the ninth aspect. are aligned and rotation of the tool holding portion is stopped, the deburring device is moved so that the deburring chip passes through the through hole, and the tool holding portion is rotated to open the through hole. In this deburring method, deburring is performed by applying the deburring tip to the edge.

In the tip holder of claim 1, the deburring tip is fitted into the tip fitting hole at the tip of the shaft portion from the side, and the rod is inserted into the rod insertion hole in the shaft portion from the base portion side to the deburring tip. The deburring tip is fixed by abutting and screwing the male screw into the female screw portion at the proximal end of the rod insertion hole. As a result, the male screw is arranged at the proximal end of the base, and the distal end of the shaft is made compact.

Here, the male screw may be provided integrally with the rod, or may be a bolt provided separately from the rod as in the second aspect of the invention. Further, the rod insertion hole may extend along the central axis of the base portion as in claim 3, or may extend parallel to the central axis of the base portion at a position deviated from the central axis of the base portion. good.

In the deburring tip, the head portion protrudes from the shaft fitting portion fitted in the tip fitting hole (invention of claim 5 ), and the head portion fits in a plane parallel to the axial direction of the shaft portion. A projecting piece protruding sideways from the side surface is provided, and the projecting piece may be, for example, a triangular projecting piece having a triangular tip edge portion (claim 7), or may be arc-shaped. good too.

According to the tip holder of claim 4 and the deburring tool of claim 8, the cross-sectional shapes of the shaft fitting part of the deburring tip and the tip fitting hole of the tip holder to which it is fixed are elliptical. Therefore, it is possible to prevent the deburring tip from rotating in the tip fitting hole. In addition, since the elliptical shape extends in the axial direction of the shaft portion, it is possible to increase the area that receives the force due to rotation.

Side sectional view of the deburring tool of the first embodiment Enlarged side sectional view of the base Side view of tip holder Exploded perspective view of deburring tool Front sectional view of deburring tool Side view of deburring device (A) Diagram showing the deburring device when removing burrs from the circular opening edge, (B) Diagram showing the deburring device when the deburring tip passes through the through hole, (C) Deburring device at the circular opening edge Diagram showing the deburring device when removing

[First embodiment]
A first embodiment of the deburring tool 10 of this embodiment will be described below with reference to FIGS. 1 to 7. FIG. As shown in FIG. 1, the deburring tool 10 of this embodiment has a deburring tip 30 attached to the tip of a tip holder 11 . Hereinafter, in the description of the deburring tool 10, the right side in FIG. 1 is called the "base end side" and the opposite side is called the "tip end side".

The tip holder 11 has a structure in which a shaft portion 20 extends from a base portion 12, as shown in FIG. The base portion 12 has a cylindrical shape with a central axis J1, and has a small diameter portion 14 on the base end side and a large diameter portion 13 larger than the small diameter portion 14 on the tip end side. Hereinafter, the central axis of the base portion 12 is referred to as "base central axis J1".

The small-diameter portion 14 is attached to, for example, a tool holding portion 92 fixed to a rotation output portion of an actuator 91 of a deburring device 90 so as to be rotatable together (see FIG. 6). As shown in FIG. 1, the tool holding portion 92 is formed with a mounting hole 92A concentric with the base central axis J1, into which the outer surface of the small diameter portion 14 is fitted. In this embodiment, the rotation center axis J2 of the tool holding part 91 is fixed at a position eccentric to the base center axis J1 in the direction away from the tip of the deburring tip 30 (see FIG. 1).

As shown in FIG. 2 , a pair of contact portions 15 that face each other in the radial direction are formed on the outer peripheral surface of the small diameter portion 14 . More specifically, the contact portion 15 is composed of a stepped surface that reduces the diameter of the proximal end of the small diameter portion 14 in a stepped manner and an inclined surface that increases in diameter from the stepped surface toward the proximal end. A pair of through holes 93 are formed in the tool holding portion 92 at positions facing the pair of contact portions 15 . , the base portion 12 is prevented from coming off.

As shown in FIG. 3, the large-diameter portion 13 is provided with a pair of flat portions 16 formed by cutting a portion of the outer peripheral surface between the tip end and the rear end so as to face each other in the radial direction. formed. The pair of flat portions 16 are arranged in a direction intersecting the facing direction of the pair of contact portions 15 (see FIG. 4). Flat surfaces (not shown) facing the pair of flat portions 16 are formed on the inner peripheral surface of the tool holding portion 92 , thereby preventing rotation of the base portion 12 with respect to the tool holding portion 92 . .

As shown in FIG. 5, the shaft portion 20 includes a semicircular portion 20A in the shape of a cylinder coaxial with the base central axis J1 and divided in half in the axial direction. and a trapezoidal portion 20B having an isosceles trapezoidal cross-sectional shape. The radius of the semicircular portion 20A is smaller than that of the large diameter portion 13 of the base portion 12. As shown in FIG. The height of the trapezoidal portion 20B is smaller than the radius of the semicircular portion 20A, and the entire trapezoidal portion 20B fits inside the circle extending the outer peripheral surface of the semicircular portion 20A.

A tip fitting hole 22 for fitting a deburring tip 30 is formed at the tip of the shaft portion 20, as shown in FIG. Specifically, the chip fitting hole 22 is formed at the widthwise central position of the upper wall 21 of the trapezoidal portion 20B and the opposite position on the outer peripheral surface of the semicircular portion 20A across the base central axis J1 from the central position. It penetrates the shaft portion 20 so as to open. The cross-sectional shape of the tip fitting hole 22 is an elliptical shape extending in the direction of the base central axis J1.

As shown in FIG. 4, the deburring tip 30 has a head portion 32 on one end face of the fitting portion 31 . The fitting portion 31 has an oval cross section and fits into the tip fitting hole 22 , and the head portion 32 protrudes from the upper wall 21 of the trapezoidal portion 20</b>B of the shaft portion 20 .

The head portion 32 is composed of a carbide tip 34 and a collar portion 33 . As shown in FIG. 5, the flange portion 33 protrudes laterally from one end of the fitting portion 31, and a step surface 33A with the fitting portion 31 abuts the upper wall 21 of the trapezoidal portion 20B. In addition, the flange portion 33 has a shape that tapers away from the fitting portion 31 .

The cemented carbide tip 34, as shown in FIG. 5, is composed of a triangular projecting piece 34A having a triangular tip edge portion at the tip, and a supporting portion 34B supporting the base end side of the triangular projecting piece 34A. The triangular projecting piece 34A is contained in a plane parallel to the base center axis J1, and part of both side surfaces thereof are sandwiched between the flanges 33. As shown in FIG. The support portion 34</b>B has the same oval bottom surface as the fitting portion 31 and is adjacent to one end surface of the fitting portion 31 .

As shown in FIG. 5, the distance of the tip of the triangular projecting piece 34A from the base central axis J1 is substantially the same as the radius of the semicircular portion 20A of the shaft portion 20. As shown in FIG. That is, the tip of the triangular projecting piece 34A is arranged on a circle extending the outer peripheral surface of the semicircular portion 20A.

As shown in FIG. 1, the tip holder 11 is formed with a rod insertion hole 23 . The rod insertion hole 23 extends along the base central axis J1, opens to the inner surface of the tip fitting hole 22 on the distal end side, and opens to the proximal end surface of the base portion 12 on the proximal end side. As shown in FIG. 2, the rod insertion hole 23 is formed with a female threaded portion 23M having an enlarged diameter on the base end side of the base portion 12. As shown in FIG. In addition, the base end opening edge of the female screw portion 23M has a tapered shape that expands in diameter toward the opening.

A rod 40 is inserted into the rod insertion hole 23 . The rod 40 has the shape of a round bar, and the tip of the rod 40 abuts against the fitting portion 31 of the deburring tip 30 fitted in the tip fitting hole 22, as shown in FIG. Specifically, a pair of contact portions 31A are formed on the outer peripheral surface of the fitting portion 31 of the deburring tip 30 so as to face each other in the direction of the base center axis J1 (see FIG. 4), and are arranged on the base end side. The front end of the rod 40 is abutted against the abutting portion 31A to prevent the deburring tip 30 from coming off. The pair of contact portions 31A has the same shape as the pair of contact portions 15 formed on the outer peripheral surface of the small diameter portion 14. As shown in FIG.

A bolt 50 is screwed into the female screw portion 23</b>M of the rod insertion hole 23 . As shown in FIG. 4, the bolt 50 has a head portion 51 and a male threaded portion 52. With the base end portion of the rod 40 fixed to the male threaded portion 52, the male threaded portion 52 extends into the rod insertion hole. 23 is screwed into the female screw portion 23M.

The configuration of the deburring tool 10 of this embodiment has been described above. Next, the effects of this deburring tool 10 will be described.

The deburring tool 10 of this embodiment is provided in, for example, a deburring device 90 shown in FIG. Burrs are removed from the circular opening edges 80A and 80B of the penetrating through-hole 80 . The actuator 91 is mounted on the robot, and its position is controlled in the up, down, left, right, front and rear directions. Moreover, the deburring tool 10 of the present embodiment can be applied to a workpiece W having a through hole 80 with a radius larger than the radius of the semicircular portion 20A of the shaft portion 20. As shown in FIG.

Specifically, first, as shown in FIG. 7A, the deburring tool 10 is linearly moved in parallel with the central axis of the through hole 80 so that the rotation central axis J2 overlaps the central axis of the through hole 80. Deburring is performed on the circular opening edge 80A. In this embodiment, the rotation center axis J2 of the tool holding part 92 is eccentric with respect to the base center axis J1 of the base part 12 in the direction away from the tip of the triangular projecting piece 34A. When the central axis of rotation J2 is overlapped, the oblique side of the tip side of the triangular projecting piece 34A of the deburring tip 30 can be brought into contact with the circular opening edge 80A. In this state, when the tool holding portion 91 is driven to rotate, the triangular projecting piece 34A moves along the circular opening edge 80A so as to draw a circular trajectory about the rotation center axis J2, and the entire circular opening edge 80A is moved. to remove burrs.

Next, the deburring device 90 stops rotating the tool holding part 92 and linearly moves the shaft part 20 until the deburring tip 30 passes through the through hole 80 . At this time, the tool holding portion 92 is controlled such that the base central axis J1 coincides with the central axis of the through hole 80, as shown in FIG. 7B. Here, as described above, the tip of the triangular projecting piece 34A is arranged on a circle extending from the outer peripheral surface of the semicircular portion 20A. By matching J1, the shaft portion 12 can pass through without scratching the inner surface of the through hole 80 due to sliding contact.

Subsequently, burrs on the circular opening edge 80B are removed. At this time, in the same way as when removing burrs from the circular opening edge 80A, as shown in FIG. The oblique side of the base end side of 34A is brought into contact with the circular opening edge 80B. When the tool holding portion 91 is driven to rotate in this state, the triangular projecting piece 34A moves along the circular opening edge 80B so as to draw a circular trajectory around the rotation center axis J2, and the entire circular opening edge 80B is moved. Remove burrs.

Here, when the triangular projection 34A of the deburring tip 30 is worn or damaged due to use, or when the diameter of the through hole 80 is changed, etc., the deburring tip 30 needs to be replaced. In the deburring tool 10 of this embodiment, the deburring tip 30 is detachable from the tip holder 11 . Next, a method for attaching and detaching the deburring tool 10 of this embodiment will be described.

First, a deburring tip 30 applicable to the through hole 80 of the work W is selected, and the fitting portion 31 of the deburring tip 30 is fitted into the tip fitting hole 22, and the upper wall 21 of the trapezoidal portion 20B of the shaft portion 20 is fitted. Insert from the side. Next, with the proximal end portion of the rod 40 fixed to the male screw portion 52 of the bolt 50 , the rod 40 is inserted into the rod insertion hole 23 from the proximal end side of the tip holder 11 . Then, the tip portion of the rod 40 abuts against the contact portion 31A of the fitting portion 31 of the deburring tip 30, and the head portion 51 of the bolt 50 is rotated so that the male thread portion 52 is engaged with the female thread portion 23M of the base portion 12. screw it on. As a result, the tightening force of the bolt 50 is applied to the fitting portion 31 via the rod 40 , and the deburring tip 30 can be fixed to the tip holder 11 . On the other hand, when removing the deburring tip 30, the screwing of the bolt 50 is released, and the fitting portion 31 of the deburring tip 30 is pushed out from the semi-circular portion 20A side of the shaft portion 20 and out of the tip fitting hole 22. Take out. The tightening of the male screw portion 52 may be performed manually or may be performed using a tool.

As described above, in the present embodiment, the deburring tip 30 can be fixed to the tip holder 11 simply by tightening the bolt 50, so attachment and detachment work is relatively easy.

Further, since the tip fitting hole 22 into which the deburring tip 30 is fitted is formed in a direction intersecting with the direction in which the bolt 50 is tightened, the tip of the rod 40 only needs to abut against the deburring tip 30. , the deburring tip 30 can be fixed to the tip holder 11 with a simple structure.

Moreover, in this embodiment, the bolt 50 for fixing the deburring tip 30 is arranged at the base end portion of the tip holder 11 . Thereby, the tip portion of the shaft portion 12 can be made compact. That is, it can be inserted into the through hole 80 having a smaller diameter, and can be applied to works W of various shapes.

Further, in the deburring device 90 of the present embodiment, when removing burrs, the triangular projecting piece 34A of the deburring tip 30 is moved along the circular opening edges 80A and 80B around the rotation center axis J2 of the tool holding portion 92. When the base portion 12 is held by eccentrically moving the base center axis J1 of the base portion 12 from the rotation center axis J2 of the tool holding portion 92 so as to draw a circular trajectory, and the shaft portion 20 is inserted into the through hole 80. 2, the base portion 12 is held with the base center axis J1 of the base portion 12 aligned with the rotation center axis J2. As a result, the circular opening edges 80A and 80B at both ends of one through-hole 80 can be deburred with a simple configuration.

Moreover, since the tip of the triangular projecting piece 34A of the deburring tip 30 is arranged on a circle formed by extending the outer peripheral surface of the semicircular portion 20A of the shaft portion 20, the deburring tip 30 can be inserted into the through hole 80. In this case, the tip portion of the deburring tool 10 can be made compact while maintaining the strength without reducing the diameter of the shaft portion 20 .

Moreover, since the cross-sectional shape of the fitting portion 31 of the deburring tip 30 and the tip fitting hole 22 of the tip holder 11 to which it is fixed is oval, the deburring tip 30 is prevent it from rotating inside. Further, since the elliptical shape extends in the axial direction of the shaft portion 20, it is possible to increase the area that receives the force due to rotation.

Further, since the flat upper wall 21 is provided on the outer surface of the shaft portion 20 and is brought into contact with the stepped surface 33A of the flange portion 33 of the head portion 32 of the deburring tip 30, the deburring tip 30 can be stably attached to the shaft portion. 20 can be fixed.
[Other embodiments]

(1) In the deburring tool 10 of the first embodiment, the rod 40 is fixed to the bolt 50 , but the rod 40 may be provided integrally with the bolt 50 .

(2) In the first embodiment, the tip of the triangular projecting piece 34A of the deburring tip 30 is arranged on a circle formed by extending the outer peripheral surface of the semicircular portion 20A of the shaft portion 20. It may be housed inside a circle extending the outer peripheral surface of 20A, or may protrude outward from the outer peripheral surface of the semicircular portion 20A.

(3) In the above-described first embodiment, the deburring device 90 is arranged such that the base center axis J1 of the base part 12 is eccentric from the rotation center axis J2 of the tool holding part 92 when the tool holding part 92 is rotationally driven. Although the base portion 12 is held in the mounting hole 92A, the base central axis J1 of the base portion 12 may be aligned with the rotation central axis J2 of the tool holding portion 92 during rotational driving.

(4) In the tip holder 11 of the first embodiment, the semicircular portion 20A of the shaft portion 20 is concentric with the base center axis J1 and has a smaller diameter than the large diameter portion 13. They may have the same diameter.

(5) Although the triangular projecting piece 34A of the deburring tip 30 of the first embodiment has a triangular shape, it may have an arc shape.

(6) In the chip holder 11 of the first embodiment, the rod insertion hole 23 extends on the base central axis J1. good.

(7) In the first embodiment, the shaft portion 20 is composed of the semicircular portion 20A and the trapezoidal portion 20B. A cut surface may be formed by cutting parallel to the axis J1, and an opening on one end side of the chip fitting hole 22 may be provided at the center position of the cut surface in the width direction.

(8) In the first embodiment, the cross-sectional shape of the fitting portion 31 of the deburring tip 30 and the cross-sectional shape of the tip fitting hole 22 of the tip holder 11 are both oval. A shape such as a square may be used.

(9) In the above-described first embodiment, the rod 40 is composed of a single round bar, but a plurality of divided pieces may be inserted therethrough.

(10) In the deburring device 90 of the first embodiment, the deburring tool 10 is fixedly supported by the tool holding portion 91, but may be supported by the tool holding portion 91 via a floating mechanism. In this case, the deburring tool 10 is normally held at the origin position where the base center axis J1 is eccentric with respect to the rotation center axis J2 in the direction away from the tip of the deburring tip 30. For example, the deburring tip 30 When a load is applied from the side, the deburring tool 10 may be allowed to change its posture from the original position and may be moved in parallel or tilted away from the load.

Although specific examples of the technology included in the claims are disclosed in the specification and drawings, the technology described in the claims is not limited to these specific examples. Various modifications and changes of the examples are included, and a part of specific examples is also included.

REFERENCE SIGNS LIST 10 deburring tool 11 tip holder 12 base portion 21 upper wall (cut surface)
22 tip fitting hole 23 rod insertion hole 23M female screw part 30 deburring tip 31 fitting part (shaft fitting part)
32 head portion 33A step surface 34A triangular projecting piece 40 rod 50 bolt (male screw)
90 Deburring device 91 Tool holding part 92A Mounting hole

Claims (10)

A tip holder having a shaft portion extending from a base portion held by a tool holding portion of an actuator and holding a deburring tip at a tip portion of the shaft portion,
a tip fitting hole that opens in a side surface of the tip of the shaft portion and into which a part of the deburring tip is fitted;
a rod insertion hole penetrating from the base end surface of the base portion to the inner surface of the tip fitting hole;
a rod inserted into the rod insertion hole and abutted against the deburring tip;
a female screw portion formed at an end portion of the rod insertion hole on the side of the base portion;
a male screw provided separately or integrally with the rod and screwed into the female screw portion ,
The cross-sectional shape of the shaft portion is a semicircle centered on the central axis of the base portion, and both ends of linear portions of the semicircle rise obliquely in a direction approaching each other, and have a height smaller than the radius of the semicircle. and an isosceles trapezoid with
The tip fitting hole penetrates the shaft portion so as to open at a center position in the width direction of the upper side of the isosceles trapezoid and at a position opposite to the center position across the central axis of the base portion. tip holder. 2. The chip holder according to claim 1, wherein said male screw is a bolt provided separately from said rod. 3. The chip holder according to claim 1, wherein said rod insertion hole extends along the central axis of said base portion. 4. The tip holder according to any one of claims 1 to 3, wherein the tip fitting hole has an oval cross section extending in the axial direction of the shaft portion. A deburring tool comprising a tip holder having a shaft extending from a base portion held by a tool holding portion of an actuator, and a deburring tip held at the tip of the shaft portion,
The tip holder has
a tip fitting hole that opens in a side surface of the tip of the shaft portion and into which a part of the deburring tip is fitted;
a rod insertion hole penetrating from the base end surface of the base portion to the inner surface of the tip fitting hole;
a rod inserted into the rod insertion hole and abutted against the deburring tip;
a female screw portion formed at an end portion of the rod insertion hole on the side of the base portion;
a male screw provided separately or integrally with the rod and screwed into the female screw portion,
The deburring tip has
A stepped surface that contacts the opening edge of the tip fitting hole is provided between the shaft fitting portion that is the portion fitted into the tip fitting hole and the head portion that projects from the side surface of the shaft portion. Deburring tool provided. The cross-sectional shape of the shaft portion is a semicircle centered on the central axis of the base portion, and both ends of linear portions of the semicircle rise obliquely in a direction approaching each other, and have a height smaller than the radius of the semicircle. and an isosceles trapezoid with
The tip fitting hole penetrates the shaft portion so as to open at a center position in the width direction of the upper side of the isosceles trapezoid and at a position opposite to the center position across the central axis of the base portion. A deburring tool according to claim 5. 6. The head portion is provided with a triangular projecting piece having a triangular tip edge portion that fits in a plane parallel to the axial direction of the shaft portion and projects sideways from a side surface of the shaft portion. 6. Deburring tool according to 6. The cross-sectional shape of the shaft fitting portion and the cross - sectional shape of the tip fitting hole are both oval shapes extending in the axial direction of the shaft portion. deburring tool. A deburring tool according to any one of claims 5 to 8;
a deburring device comprising the actuator that rotationally drives the tool holding part,
The shaft portion has a shape having a flat cut surface parallel to the central axis obtained by cutting a portion of a round bar centered on the central axis of the base portion,
The deburring tip protrudes from the cut surface of the shaft portion and has a tip end that fits within a circle extending from the outer peripheral surface of the shaft portion,
The tool holding portion has a mounting hole into which the base portion is fitted,
The mounting hole is deviated from the rotation center of the tool holding portion so that the tip of the deburring tip, between the shaft portion and the deburring tip, is arranged at a position farthest from the rotation center of the tool holding portion. Mindful deburring equipment. A deburring method using the deburring device according to claim 9,
The deburring tip passes through the through hole formed in the work to be deburred, with the central axis of the through hole being aligned with the central axis of the base portion and the rotation of the tool holding portion being stopped. move the deburring device so as to
A deburring method of deburring by rotating the tool holding part and applying the deburring tip to the opening edge of the through hole.

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