JP2020082221A - Deburring tool, deburring method and deburring device - Google Patents

Abstract

To provide a deburring tool that can efficiently remove a burr having entered a cylindrical hole, and to provide a deburring method and a deburring device.SOLUTION: A deburring tool 2 includes: a rod-like tool body 10 inserted into a cylindrical hole 3a; and a blade part 11 for chipping off a burr B formed at an end of the tool body 10. The blade part 11 is formed into an annular shape or circular arc shape along an outer periphery of the tool body 10 and is configured to chip off the burr B by moving the tool body 10 in an axial direction.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a deburring tool, a deburring method, and a deburring device that remove a circular burr that enters a cylindrical hole when a through hole reaching the cylindrical hole is formed in a metallic cylindrical member.

As shown in FIG. 6 and FIG. 7, in the case of forming a through hole 3b that reaches the cylindrical hole 3a of the cylindrical member 3 by drilling from the outside in the radial direction in the cylindrical member 3 made of metal having a circular cross section, Burr B occurs and the burr B enters into the cylindrical hole 3 a. As a method of removing the burr B, a rotary tool (not shown) such as a drill or a reamer is attached to the tip of a shaft (not shown), and the rotary tool is rotated while rotating the shaft and the rotary tool. There is a method to insert and remove it.

JP, 2009-39842, A JP, 2007-210056, A

However, in this method, when the shaft is inserted, the burr B may be pushed into the through hole 3b to close the through hole 3b. In this case, the operation of pushing the burr B that has entered the through hole 3b inward from the outside in the radial direction and inserting/removing the tool into/from the cylindrical hole 3a while rotating the shaft again is troublesome.

Therefore, the present disclosure has been devised in view of such circumstances, and an object thereof is to provide a deburring tool, a deburring method, and a deburring device that can efficiently remove burrs that have entered the cylindrical hole.

According to one aspect of the present disclosure,
A deburring tool that removes circular burrs that enter into the cylindrical hole when a through hole that reaches the cylindrical hole of the cylindrical member is formed by drilling from the outside in the radial direction in the cylindrical member made of metal. ,
A rod-shaped tool body inserted into the cylindrical hole,
And a blade portion provided at the tip of the tool body for cutting off the burr,
The deburring tool is characterized in that the blade portion is formed in an annular shape or an arc shape along the outer periphery of the tool body, and is configured to scrape off the burr by axial movement of the tool body. Will be provided.

Preferably, the blade portion includes a blade back surface formed on the outer periphery of the blade body and extending in the axial direction of the tool body, and a rake surface formed on the inner periphery of the blade body and inclined with respect to the axial direction of the tool body.

Preferably, a tip surface that intersects the axial direction of the tool body at an obtuse angle or at a right angle is formed at the tip of the blade portion.

Preferably, a burr pushing surface for pushing the burr cut off from the tubular member forward is formed on the inner peripheral side of the blade portion.

Preferably, the burr pushing surface is formed axially separated from the tip of the blade so that the blade does not contact the burr when the blade first contacts the burr.

Further, according to one aspect of the present disclosure,
A deburring method for removing a circular burr that enters the cylindrical hole when a through hole reaching a cylindrical hole of the cylindrical member is formed by drilling from the outside in the radial direction in a cylindrical member made of metal. ,
A deburring method is provided, wherein the deburring tool according to any one of claims 1 to 5 is axially inserted into the cylindrical hole to scrape off the burr from the cylindrical material.

Further, according to one aspect of the present disclosure,
A deburring device that removes circular burrs that enter the cylindrical hole when a through hole that reaches the cylindrical hole of the cylindrical member is formed by drilling from the outside in the radial direction in the cylindrical member made of metal. ,
A deburring tool according to any one of claims 1 to 5,
A tubular material support portion for supporting the tubular material,
A tool insertion machine that axially inserts the deburring tool into the cylindrical hole of the cylindrical material supported by the cylindrical material support portion,
There is provided a deburring device comprising:

According to the above aspect, the burr that has entered the cylindrical hole can be efficiently removed.

1 is a schematic side view of a deburring device according to an embodiment of the present disclosure. It is a schematic side view of the deburring device which inserted the deburring tool in the cylindrical material. It is a side view of a deburring tool. It is a sectional side view of a cylinder material and a deburring tool. It is a principal part enlarged view which shows the positional relationship of a burr and a deburring tool. It is a front sectional view of a tubular member in which burrs are generated. It is a principal part expanded sectional view which shows the generation|occurrence|production state of a burr.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be noted that the front, rear, left, right, up, and down directions in the embodiments described below are merely defined for convenience of description.

FIG. 1 is a schematic side view of a deburring device according to this embodiment. FIG. 2 is a schematic side view of a deburring device in which a deburring tool is inserted into a tubular material.

As shown in FIGS. 1 and 2, the deburring device 1 includes a deburring tool 2, a tubular material support portion 4 that supports the tubular material 3, and a tubular hole of the tubular material 3 supported by the tubular material support portion 4. The tool insertion machine 5 which inserts the deburring tool 2 in 3a is provided.

The tubular material support portion 4 includes a pedestal 6 and a grip portion 7 provided on the pedestal 6 for gripping the tubular material 3 from both left and right sides. A plurality of grips 7 are arranged on the pedestal 6 at intervals in the front-rear direction, and support the cylindrical member 3 in a posture extending in the front-rear direction. The deburring device 1 further includes a base 8 and a tubular material supply unit 9 that supplies the tubular material 3 to the tubular material support portion 4. The base 8 is formed to extend in the front-rear direction. On the base 8, a tool insertion machine 5, a tubular material support portion 4 and a tubular material supply portion 9 which will be described later are provided. The tubular material supply unit 9 supplies the tubular material 3 placed on a mounting table (not shown) to the grip portion 7 of the tubular material support unit 4.

As shown in FIG. 3, the deburring tool 2 includes a rod-shaped tool body 10 that is inserted into the cylindrical hole 3 a of the cylindrical member 3, and a blade portion that is provided at the tip of the tool body 10 and that is used to scrape off the burr B. 11 and. In addition, in the present embodiment, the blade portion 11 is provided integrally with the tool body 10, but the blade portion 11 may be formed separately from the tool body 10.

The burr B will be described here. As shown in FIGS. 6 and 7, the burr B is formed when a drill D having a smaller diameter than the cylindrical hole 3a is made to reach the inside of the cylindrical hole 3a from the radially outer side of the cylindrical member 3 to form the through hole 3b. It Therefore, the burr B is connected to the inner peripheral surface 3c of the cylindrical member 3 with the base end R being the position where the drill D reaches last. That is, the base end R of the burr B is formed at one point of a substantially circular ridge line formed by the cylindrical hole 3a and the through hole 3b intersecting each other. Then, the burr B is formed in a circular shape and an umbrella shape having the same diameter as the through hole 3b having the center O, and enters the cylindrical hole 3a. Further, the burr B has an outer peripheral edge E directed in the axial direction (front-rear direction) of the cylindrical hole 3a as illustrated.

As shown in FIG. 3, the blade portion 11 and the tool body 10 are made of a steel material having both hardness and toughness, for example, high speed tool steel. Moreover, the blade part 11 is formed in a substantially annular shape. The outer diameter (diameter) of the blade portion 11 is set to be slightly smaller than the diameter of the cylindrical hole 3a. Further, the outer diameter of the blade portion 11 is set to be larger than a value obtained by subtracting the radius r (=the radius of the burr B) of the through hole 3b from the diameter of the cylindrical hole 3a. If the outer diameter of the blade portion 11 is made smaller than this, the tip of the blade portion 11 may come into contact with the tip side of the center O of the burr B. In this case, there is a possibility that the burr B may fail to be cut off from the base end R. For example, the diameter of the cylindrical hole 3a is about 10 mm.

The tool body 10 is formed in a cylindrical shape having the same diameter as the outer diameter of the blade 11. At the rear end of the tool body 10, a mounting portion 20 for mounting on an insertion rod 16 of the tool insertion machine 5 described later is formed. The mounting portion 20 has a smaller diameter than the tool body 10 at the front and is formed coaxially with the tool body 10. The mounting portion 20 includes a male screw portion 21 formed at a rear end portion thereof, and a tool engagement portion 22 formed on the mounting portion 20 in front of the male screw portion 21 for engaging a tool such as a spanner. The male screw portion 21 is screwed into a female screw portion 23 formed at the tip of the insertion rod 16. The tool engagement portion 22 is composed of two flat surfaces formed on the attachment portion 20 having a circular cross section. These flat surfaces are formed in parallel with each other on the outer peripheral surface of the mounting portion 20 in the radial direction.

As shown in FIGS. 4 and 5, the blade portion 11 projects in the axial direction (forward) from the tool body 10. The blade portion 11 is formed in a wedge shape in cross section and is formed in the same cross section shape over the entire circumference. The tip (front end) of the blade 11 is formed at an acute angle. The blade portion 11 has a blade back surface 12 formed on the outer circumference thereof and extending in the axial direction of the tool body 10, and a rake surface 13 formed on the inner circumference thereof and inclined with respect to the axial direction (front-back direction) of the tool body 10. Prepare

The blade back surface 12 is formed in an arc shape flush with the outer peripheral surface of the tool body 10. The angle θ of the rake face 13 with respect to the axial direction is an angle that forms an acute angle, and is set to, for example, 10° or more and 45° or less, preferably 15° or more and 45° or less.

If the tip of the blade 11 is too sharp, it is likely to be chipped. Therefore, a tip surface 14 that intersects the axial direction at a right angle is formed at the tip of the blade portion 11. The tip surface 14 is formed over the entire circumference of the blade 11. Further, the radial dimension x of the tip surface 14 is formed uniformly over the entire circumference. The dimension x is set to be smaller than the radius r of the through hole 3b. Thereby, the tip end surface 14 of the blade portion 11 can be brought into contact with the base end R side from the center O of the burr B, and the burr B can be efficiently scraped off. The tip surface 14 may be omitted when the blade portion 11 is less likely to be chipped, such as when the tubular member 3 is made of a material that is sufficiently softer than the blade portion 11.

Further, a burr pushing surface 15 for pushing the burr B cut off from the cylindrical member 3 forward is formed on the inner peripheral side of the blade portion 11. The burr pushing surface 15 is formed in a flat shape. The burr pressing surface 15 is formed rearward from the tip of the blade portion 11 so as not to contact the burr B when the blade portion 11 first contacts the burr B.

As shown in FIG. 1 and FIG. 2, the tool insertion machine 5 moves the insertion rod 16 supporting the deburring tool 2 and the insertion rod 16 forward toward the tubular material 3 supported by the tubular material support portion 4. And a drive unit 17 for pushing out. The insertion rod 16 is formed in a cylindrical shape having the same diameter as the tool body 10. At the tip of the insertion rod 16, a female screw portion 23 screwed with the male screw portion 21 of the deburring tool 2 is provided coaxially with the insertion rod 16. The drive unit 17 includes a movable unit 18 that detachably holds the insertion rod 16, and a fixed unit 19 that is provided on the base 8 and that moves the movable unit 18 in the front-rear direction.

Next, a deburring method using the deburring tool 2 will be described.

When removing the burr B generated on the cylindrical member 3, the cylindrical member 3 is set on a mounting table (not shown) of the deburring device 1 and the deburring device 1 is activated. As a result, the tubular material supply unit 9 supplies the tubular material 3 on the mounting table to the grip portion 7 of the tubular material support unit 4. The tubular member 3 gripped by the grip portion 7 is fixed in a horizontal posture in which both ends are oriented in the front-rear direction.

Then, the movable part 18 of the tool insertion machine 5 is horizontally moved forward. As a result, the deburring tool 2 provided at the tip of the insertion rod 16 is moved forward together with the insertion rod 16 and inserted into the cylindrical hole 3 a of the cylindrical member 3.

As shown in FIG. 5, the blade portion 11 of the deburring tool 2 that has reached the position of the burr B abuts on the base end R side of the center O of the burr B. Specifically, the inner peripheral edge of the tip surface 14 of the blade portion 11 or the inner peripheral edge of the tip of the rake face 13 contacts the outer peripheral edge E of the burr B on the base end R side. Incidentally, there is a very small radial gap between the blade portion 11 and the inner peripheral surface 3c of the tubular member 3. After that, when the blade portion 11 moves further forward, the blade portion 11 is guided by the outer peripheral edge E of the burr B and moves radially outward (rattles) toward the base end R side of the burr B. As a result, the blade back surface 12 of the blade portion 11 is brought into contact with the inner peripheral surface 3c. While maintaining this state, the blade portion 11 advances to cooperate with the inner peripheral surface 3c to shear the base end R of the burr B.

At this time, the deburring tool 2 is not rotated around its central axis. If the deburring tool 2 has been rotated around its central axis, the burr B may be bent at the base end position at the tip of the deburring tool 2 and pushed into the through hole 3b. In this case, not only the cutting of the burr B will fail, but also extra work will increase. Specifically, the burr B bent in the through hole 3b has to be pushed out of the through hole 3b, and the burrs must be removed again.

However, the burrs B can be cut off from the base end R by one operation by advancing the deburring tool 2 without rotating it to cut the burrs B as in the present embodiment. Therefore, the burr B can be stably and efficiently removed, and the extra work described above can be eliminated.

The deburring tool 2 that has cut the burr B is further advanced by the tool insertion machine 5. The burr B cut from the tubular material 3 is guided by the rake surface 13 of the blade portion 11 and captured in the space surrounded by the blade portion 11 and the burr pushing surface 15. Then, the burr B is pushed by the burr pushing surface 15 in this state and moved forward. Therefore, the burr B is prevented from rubbing against the inner peripheral surface 3c of the tubular member 3, and the inner peripheral surface 3c of the tubular member 3 is prevented from being damaged.

After this, the deburring tool 2 penetrates in front of the tubular member 3. As a result, the burr B is discharged to the outside of the tubular material 3.

After that, the deburring tool 2 is moved to the rear of the tubular material 3 by the tool insertion machine 5, and the tubular material 3 is transferred from the tubular material support portion 4 to a predetermined position by the tubular material supply portion 9.

As described above, the deburring tool 2 includes the rod-shaped tool body 10 that is inserted into the cylindrical hole 3a, and the blade portion 11 that is provided at the tip of the tool body 10 to scrape off the burr B. The reference numeral 11 is formed in an annular shape along the outer periphery of the tool body 10 and is configured to remove the burr B by axial movement of the tool body 10. Therefore, it is possible to cut the burr B that has entered the cylindrical hole 3a without rotating the deburring tool 2. When the burr B is cut, the burr B can be prevented from being pushed into the through hole 3b, and the burr B can be cut stably and efficiently.

Further, the blade portion 11 is provided with a blade back surface 12 formed on the outer periphery thereof and extending in the axial direction of the tool body 10, and a rake surface 13 formed on the inner periphery thereof and inclined with respect to the axial direction of the tool body 10. .. Therefore, the burr B can be stably removed from the base end R.

Further, a tip surface 14 that intersects the axial direction of the tool body 10 at a right angle is formed at the tip of the blade portion 11. Therefore, it is possible to prevent the tip of the blade portion 11 from being chipped due to the collision with the burr B.

In addition, a burr pushing surface 15 for pushing the burr B cut off from the tubular member 3 forward is formed on the inner peripheral side of the blade portion 11. Therefore, the burr B can be pushed out of the tubular material 3.

The burr pushing surface 15 is formed so as to be separated from the tip of the blade portion 11 rearward so as not to contact the burr B when the blade portion 11 first contacts the burr B. Therefore, the burr pushing surface 15 can be prevented from interfering with the burr B before cutting.

Although the embodiments of the present disclosure have been described above in detail, the present disclosure can be applied to the following other embodiments.

(1) The blade portion 11 is formed in an annular shape, but may be formed in an arc shape along the outer periphery of the tool body 10. In this case, the position of the through hole 3b in the circumferential direction may be adjusted in advance to the position of the blade portion 11 in the circumferential direction.

(2) The tip surface 14 is formed at a right angle to the axial direction of the tool body 10, but it may be formed to form an obtuse angle with respect to the axial direction of the tool body 10.

The configurations of the respective embodiments described above can be partially or wholly combined unless there is a contradiction. The embodiments of the present disclosure are not limited to the above-described embodiments, and all modifications, applications, and equivalents included in the concept of the present disclosure defined by the claims are included in the present disclosure. Therefore, the present disclosure should not be construed as limited, and can be applied to any other technique belonging to the scope of the idea of the present disclosure.

DESCRIPTION OF SYMBOLS 1 Deburring device 2 Deburring tool 3 Cylindrical material 3a Cylindrical hole 3b Through hole 4 Cylindrical material support 5 Tool inserter 6 Pedestal 7 Grip 8 Base 9 Cylindrical material supply 10 Tool body 11 Blade 12 Blade back 13 Scoop Surface 14 Tip surface 15 Burr pushing surface 16 Insert rod 17 Drive portion 18 Moving portion 19 Fixed portion 20 Mounting portion 21 Male screw portion 22 Tool engaging portion 23 Female screw portion B Burr D Drill E Outer peripheral edge O Center R Base end r Radius x dimension θ angle

Claims (7)

A deburring tool that removes circular burrs that enter into the cylindrical hole when a through hole that reaches the cylindrical hole of the cylindrical member is formed by drilling from the outside in the radial direction in the cylindrical member made of metal. ,
A rod-shaped tool body inserted into the cylindrical hole,
And a blade portion provided at the tip of the tool body for cutting off the burr,
The deburring tool is characterized in that the blade portion is formed in an annular shape or an arc shape along the outer periphery of the tool body, and is configured to scrape off the burr by axial movement of the tool body. .. The said blade part is provided with the blade back surface formed in the outer periphery and extended in the axial direction of the said tool main body, and the rake surface formed in the inner periphery and inclined with respect to the axial direction of the said tool main body. The described deburring tool. The deburring tool according to claim 1 or 2, wherein a tip surface that intersects the axial direction of the tool body at an obtuse angle or at a right angle is formed at the tip of the blade portion. The deburring tool according to any one of claims 1 to 3, wherein an inner peripheral side of the blade portion is formed with a deburring surface for pushing forward the deburred from the tubular material. The deburring surface according to claim 4, wherein the deburring surface is axially separated from the tip of the blade so that the deburring surface does not come into contact with the burr when the blade first contacts the burr. tool. A deburring method for removing a circular burr that enters the cylindrical hole when a through hole reaching a cylindrical hole of the cylindrical member is formed by drilling from the outside in the radial direction in a cylindrical member made of metal. ,
A deburring method comprising: inserting the deburring tool according to any one of claims 1 to 5 in an axial direction into the cylindrical hole to scrape off the burr from the cylindrical material. A deburring device that removes circular burrs that enter the cylindrical hole when a through hole that reaches the cylindrical hole of the cylindrical member is formed by drilling from the outside in the radial direction in the cylindrical member made of metal. ,
A deburring tool according to any one of claims 1 to 5,
A tubular material support portion for supporting the tubular material,
A tool insertion machine that axially inserts the deburring tool into the cylindrical hole of the cylindrical material supported by the cylindrical material support portion,
A deburring device characterized by being equipped with.

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