# US 9,434,009 B2 · Drill and boring device using same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 9,434,009 B2
- Document ID: US9434009B2
- Status: Granted
- Kind: B2
- Application number: 14/118,371
- Filed: 2012-05-08
- Published: 2014-03-27
- Granted: 2016-09-06
- Earliest claimed: 2011-05-18
- Assignees: UHT Corporation; BTT Corporation
- Applicants: Masakazu Kakimoto; Wataru Aoki
- Inventors: Masakazu Kakimoto; Wataru Aoki
- Web page: https://patentgrep.com/patent/US9434009B2

## CPC

- B23B 47/34: Arrangements for removing chips out of the holes made; Chip- breaking arrangements attached to the tool {(chip-breaking in turning machines B23B25/02; in turning tools B23B27/22)}
- B23B 51/009: {Stepped drills}
- B23B 51/108: {having a centering drill}
- B23Q 11/0046: {by sucking}
- B23B 2215/04: Aircraft components
- B23B 2226/275: Carbon fibre reinforced carbon composites
- B23B 2251/68: Drills with provision for suction
- Y02P 70/10: Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
- Y10T 407/24: with chip breaker, guide or deflector
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Provided are a drill that enhances work efficiency and process accuracy of a boring process, and a boring device enabling dust collection and recovery by using the drill. In a drill formed with a chip exhaust 102 along a center of an axis in a drill body 101, a large-diameter cylindrical body 101a with an outer diameter increased via a different level part G or G′ is provided on a base end side of the drill body 101, first cutting edges 110 are provided on a tip part of the drill body, first scrap lead pockets 112 leading to the chip exhaust are provided in the vicinity of the first cutting edges 110, second cutting edges 120 are provided on the different level part, and second scrap lead pockets 122 leading to the chip exhaust are provided in the vicinity of the second cutting edges 120. A boring device is configured cuch that a dust collection mechanism 50 is coupled to a back end of the chip exhaust 102 of the drill body, and produced chips are suction-recovered in the dust collection mechanism 50 by boring a work material W while a driving source rotates the drill body 101.

## Claims

### Claim 1

A drill having an inner passage that is formed along a center of an axis in a drill body and serves as a chip exhaust, the drill comprising:
a large-diameter cylindrical body having an outer diameter increased via a different level part, and coaxially provided on a base end side of the drill body;
a first cutting edge provided on a tip part of the drill body and a first scrap lead pocket being opened toward a rotating direction front side of a verge line that extends backward from the first cutting edge and leading to said chip exhaust;
a second cutting edge provided on said different level part and a second scrap lead pocket being opened toward a rotating direction front side of verge lines that extend forward and backward from the second cutting edge and leading to said chip exhaust; and
a boring edge and a boring edge scrap lead pocket that are arranged just behind said first cutting edge, wherein an outer diameter of said boring edge is larger than an outer diameter of said first cutting edge.

### Claim 2 (depends on 1)

The drill according to claim 1, wherein said different level part is an inclined surface gradually increasing an outer diameter toward the base end side, and the second cutting edge is for a countersink process or a chamfering process, which is formed on the inclined surface.

### Claim 3 (depends on 1)

The drill according to claim 1, wherein said different level part is a perpendicular surface orthogonal to the center of an axis of the drill body, and the second cutting edge is for a counter boring process, which is formed on the perpendicular surface.

### Claim 4 (depends on 1)

The drill according to claim 1, wherein said drill body includes a sub-cutting edge, and
said sub-cutting edge is configured such that a groove is formed on an outer periphery surface from a vicinity of the tip of said drill body to said different level part in a periphery direction at predetermined intervals, and a cutting edge is provided on a verge end of said groove.

### Claim 5 (depends on 1)

A boring device comprising:
a hollow spindle serving as a spindle rotated by a driving source; and
the drill according to claim 1 mounted on a tip of the hollow spindle via a chuck, wherein
a dust collection mechanism is coupled to a passage back end in said hollow spindle,
a work material is bored while said driving source rotates said drill via the hollow spindle,
chips produced during boring performed by the first cutting edge of said drill are sucked in the chip exhaust through the first scrap lead pocket,
chips produced during boring performed by the second cutting edge of said drill are sucked in the chip exhaust through the second scrap lead pocket, and
the chips sucked in the chip exhaust are suction-recovered in the dust collection mechanism through a passage in said hollow spindle.

### Claim 6 (depends on 5)

The boring device according to claim 5, wherein said hollow spindle has a single cylindrical structure, said drill is mounted on a tip of the single cylinder spindle via the chuck, and the dust collection mechanism is coupled to a back end of the single cylinder spindle.

### Claim 7 (depends on 5)

The boring device according to claim 5, wherein said driving source is a hollow motor arranged in a housing, and said hollow spindle is rotatably coupled in a rotor of the hollow motor.

### Claim 8 (depends on 5)

The boring device according to claim 5, wherein said driving source is a combination of a hollow motor and a feed motor arranged in a housing, said hollow spindle is rotatably coupled in a rotor of the hollow motor, and the feed motor causes said hollow spindle to move forward and backward to enable pitch feeding of said drill.

### Claim 9 (depends on 2)

The drill according to claim 2, wherein said drill body includes a sub-cutting edge, and
said sub-cutting edge is configured such that a groove is formed on an outer periphery surface from a vicinity of the tip of said drill body to said different level part in a periphery direction at predetermined intervals, and a cutting edge is provided on a verge end of said groove.

### Claim 10 (depends on 3)

The drill according to claim 3, wherein said drill body includes a sub-cutting edge, and
said sub-cutting edge is configured such that a groove is formed on an outer periphery surface from a vicinity of the tip of said drill body to said different level part in a periphery direction at predetermined intervals, and a cutting edge is provided on a verge end of said groove.

### Claim 11 (depends on 5)

A boring device according to claim 5, wherein the different level part of said drill is an inclined surface gradually increasing an outer diameter toward the base end side, and the second cutting edge is for a countersink process or a chamfering process, which is formed on the inclined surface.

### Claim 12 (depends on 5)

A boring device according to claim 5, wherein the different level part of said drill is a perpendicular surface orthogonal to the center of an axis of the drill body, and the second cutting edge is for a counter boring process, which is formed on the perpendicular surface.

### Claim 13 (depends on 5)

A boring device according to claim 5, wherein said drill body includes a sub-cutting edge, and
said sub-cutting edge is configured such that a groove is formed on an outer periphery surface from a vicinity of the tip of said drill body to said different level part in a periphery direction at predetermined intervals, and a cutting edge is provided on a verge end of said groove.

### Claim 14 (depends on 6)

The boring device according to claim 6, wherein said driving source is a hollow motor arranged in a housing, and said hollow spindle is rotatably coupled in a rotor of the hollow motor.

### Claim 15 (depends on 6)

The boring device according to claim 6, wherein said driving source is a combination of a hollow motor and a feed motor arranged in a housing, said hollow spindle is rotatably coupled in a rotor of the hollow motor, and the feed motor causes said hollow spindle to move forward and backward to enable pitch feeding of said drill.