WO2018092351A1 - 切削工具および切削加工方法 - Google Patents
切削工具および切削加工方法 Download PDFInfo
- Publication number
- WO2018092351A1 WO2018092351A1 PCT/JP2017/024926 JP2017024926W WO2018092351A1 WO 2018092351 A1 WO2018092351 A1 WO 2018092351A1 JP 2017024926 W JP2017024926 W JP 2017024926W WO 2018092351 A1 WO2018092351 A1 WO 2018092351A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cutting
- cutting edge
- back surface
- outer peripheral
- edge portion
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/12—Cutters specially designed for producing particular profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
Definitions
- the present invention relates to a cutting tool and a cutting method.
- This application claims priority based on Japanese Patent Application No. 2016-222374, which is a Japanese patent application filed on November 15, 2016. All the descriptions described in the Japanese patent application are incorporated herein by reference.
- burrs are likely to occur on the back surface opposite to the processed surface.
- the design is such that the burr is removed by attaching a chamfered portion in the part shape.
- backside removal is generally referred to as backside removal.
- a tool for performing such back surface chamfering is a complete end mill shape, and a tool having a cutting edge having an angle called a chamfering blade at the tip.
- Patent Document 1 A spherical blade end mill that can also be used for backside cutting is disclosed in, for example, Japanese Patent Application Laid-Open No. 11-156622 (Patent Document 1).
- the cutting tool of the present disclosure is a cutting tool made of a complete end mill, and includes a shank portion, a back surface cutting edge portion, and an outer peripheral cutting edge portion.
- the back surface cutting blade portion has a back surface cutting blade.
- the outer peripheral cutting edge portion is located between the shank portion and the back surface cutting edge portion, and has a cutting edge on the outer peripheral surface.
- the cutting edge of the outer peripheral cutting edge portion is a right-handed left-handed twisting blade.
- FIG. 1 is a perspective view showing a configuration of a cutting tool according to an embodiment.
- FIG. 2 is a front view showing the configuration of the cutting tool shown in FIG.
- FIG. 3 is a front view showing the configuration of the first comparative example.
- FIG. 4 is a front view showing the configuration of the second comparative example.
- One aspect of the present disclosure has been made in order to solve the above-described problems, and an object thereof is a cutting tool and a cutting method capable of suppressing the occurrence of deformation, chatter vibration, and edge chipping in a work material. Is to provide. [Effects of the present disclosure] According to one aspect of the present disclosure, it is possible to provide a cutting tool and a cutting method that can suppress deformation, chatter vibration, and edge chipping in a work material.
- a cutting tool 10 is a cutting tool made of a complete end mill, and includes a shank portion 10C, a back surface cutting edge portion 10A, and an outer peripheral cutting edge portion 10B. . 10 A of back surface cutting blade parts have the back surface cutting blade 1a.
- the outer peripheral cutting edge portion 10B is located between the shank portion 10C and the back surface cutting edge portion 10A, and has a cutting edge 2a on the outer peripheral surface.
- the cutting edge 2a of the outer peripheral cutting edge portion 10B is a right-handed left-handed twisting blade.
- a cutting resistance is generated in the back face cutting edge portion 10A toward the shank portion 10C during the cutting process.
- the cutting force by the right blade left helix blade works so as to be directed toward the tip portion side.
- the cutting force acting on the back surface cutting edge portion 10A and the cutting force acting on the outer peripheral cutting edge portion 10B are opposite to each other, thereby canceling each other out as an internal force. For this reason, the effect that the cutting force applied to the work material 20 is reduced can be obtained, and problems such as deformation of the work material 20, chatter vibration, and chipping of the edge can be suppressed.
- the cutting edge 2a of the outer peripheral cutting edge portion 10B may extend linearly and be inclined at a minus angle. Thereby, cutting force can be made to work so that it may go to the front-end
- the twist angle of the cutting edge 2a of the outer peripheral cutting edge portion 10B may be 3 ° or more and 30 ° or less. Thereby, the cutting force can be appropriately directed to the tip end side in the outer peripheral cutting edge portion 10B.
- the twist angle is less than 3 °, the cutting force toward the tip is insufficient.
- the twist angle exceeds 30 °, the contact length of the cutting edge becomes large and the resistance becomes too large.
- the back surface cutting edge portion 10A protrudes more outward than the outer peripheral cutting edge portion 10B, and the back surface cutting edge 1a is separated from the shank portion 10C. You may leave
- the cutting tool 10 may further include a bottom blade 10D positioned at a tip portion opposite to the shank portion 10C. Thereby, drilling can be performed.
- a cutting method according to an embodiment of the present invention is a cutting method using the cutting tool 10 according to any one of (1) to (5) above.
- the work material 20 is processed by rotating the cutting tool 10 clockwise from the viewpoint of viewing the back cutting edge 10A from the shank part 10C side of the cutting tool 10.
- the work material 20 is processed by the clockwise rotation of the cutting tool 10. For this reason, during the cutting process, a cutting resistance is generated in the back cutting edge portion 10A toward the shank portion 10C, but in the outer peripheral cutting edge portion 10B, the cutting force by the right-handed left-handed twisting blade is directed toward the tip portion side. To work. Thereby, the cutting force acting on the back surface cutting edge portion 10A and the cutting force acting on the outer peripheral cutting edge portion 10B are opposite to each other, thereby canceling each other out as an internal force. For this reason, the effect that the cutting force applied to the work material 20 is reduced can be obtained, and problems such as deformation of the work material 20, chatter vibration, and chipping of the edge can be suppressed.
- the cutting tool 10 which concerns on one Embodiment is demonstrated.
- the cutting tool 10 according to the present embodiment is a cutting tool made of, for example, a total shape end mill, and includes a shank portion 10C, a back surface cutting edge portion 10A, and an outer peripheral cutting edge portion 10B. Have.
- the shank part 10C is a part for attaching to the spindle of the milling machine.
- the shank portion 10C is, for example, a straight shank, but may be a taper shank.
- the back surface cutting edge portion 10A is disposed on the tip end side of the cutting tool 10.
- 10 A of back surface cutting blade parts protrude on the outer peripheral side rather than the outer peripheral cutting edge part 10B.
- the maximum diameter D1 of the tip of the cutting tool 10 is larger than the maximum diameter D2 of the shank 10C.
- a plurality of (for example, four) back surface cutting edge portions 10A are arranged.
- Each of the plurality of back surface cutting edge portions 10A has a back surface cutting edge 1a.
- This back surface cutting blade 1a is comprised by the ridgeline which the flank 1b in the back surface cutting blade part 10A and the scoop surface 1c cross
- Each of the plurality of back surface cutting blades 1a is away from the shank portion 10C, and therefore away from the rotation center C of the outer peripheral cutting edge portion 10B.
- Each of the plurality of back surface cutting blades 1a is, for example, a left twist blade.
- each of the plurality of back surface cutting blades 1a is not limited to a left-handed blade, and may be a straight blade or a right-handed blade. Cutting is possible even if each of the plurality of back surface cutting blades 1a is a straight blade or a right helix blade, but resistance to the tip direction by the back surface cutting blade 1a is eliminated, chatter is increased, and a work material (work) It becomes easy to generate burrs on the upper side. Therefore, each of the plurality of back surface cutting blades 1a is preferably a left-handed blade.
- the outer peripheral cutting edge portion 10B is located between the shank portion 10C and the back surface cutting edge portion 10A.
- the outer peripheral cutting edge portion 10B has a plurality (for example, four) of cutting edges 2a on the outer peripheral surface.
- Each of the plurality of cutting edges 2a is configured by a ridge line where the flank 2b and the rake face 2c in the outer peripheral cutting edge portion 10B intersect.
- Each of the plurality of cutting blades 2a is a right blade left-twisted blade.
- the “right blade” means that the cutting tool 10 rotates clockwise from the viewpoint of viewing the back surface cutting blade portion 10A from the shank portion 10C.
- the “left-handed blade” means that the cutting edge 2a is twisted in the counterclockwise direction from the viewpoint of viewing the back surface cutting edge portion 10A from the shank portion 10C.
- the “left helix blade” means that the cutting edge 2a is raised to the left along the direction in which the rotation center (axial center) C of the cutting tool 10 extends in the front view shown in FIG. Means.
- Light twist blade is the opposite of “left twist blade”. Further, that the back surface cutting blade 1 a is “straight blade” means that the back surface cutting blade 1 a is parallel to the rotation center C of the cutting tool 10 in the front view shown in FIG. 2.
- Each of the plurality of cutting edges 2a extends, for example, linearly and is inclined at a minus angle.
- the twist angle ⁇ (FIG. 2) in each of the plurality of cutting edges 2a is 3 ° or more and 30 ° or less.
- the twist angle ⁇ is measured with reference to the rotation center C of the cutting tool 10 and is an inclination angle from the rotation center C. Specifically, in the front view shown in FIG. 2, the rotation center C is 0 °, the clockwise angle ⁇ is a “plus angle”, and the counterclockwise angle ⁇ is a “minus angle”.
- the cutting tool 10 has a plurality (for example, four) of chip discharge grooves 3 on the outer peripheral surface.
- Each of the plurality of chip discharge grooves 3 extends from the outer peripheral cutting edge portion 10B to the tip of the cutting tool 10 through the back surface cutting edge portion 10A.
- Each of the plurality of chip discharge grooves 3 is left-handed.
- a part of the wall surface of the chip discharge groove 3 in the back surface cutting edge portion 10A constitutes a rake face 1c of the back surface cutting edge portion 10A.
- a part of the wall surface of the chip discharge groove 3 in the outer peripheral cutting edge portion 10B constitutes a rake face 2c of the outer peripheral cutting edge portion 10B.
- the back surface cutting edge 1a of the back surface cutting edge part 10A and the cutting edge 2a of the outer peripheral cutting edge part 10B are connected.
- the flank 1b of the back surface cutting edge 10A and the flank 2b of the outer peripheral cutting edge 10B are continuous.
- the rake face 1c of the back surface cutting edge portion 10A and the rake face 2c of the outer peripheral cutting edge portion 10B are continuous.
- the cutting tool 10 further has a bottom blade 10D.
- 10 D of bottom blades are located in the front-end
- the cutting tool 10 rotates in the clockwise direction (arrow R direction in FIG. 2) from the viewpoint of the cutting tool 10 looking at the back cutting edge portion 10A from the shank portion 10C side.
- the workpiece 20 is cut by the rotating cutting tool 10.
- the wall surface of the hole 20a of the work material 20 is cut by the cutting edge 2a of the outer peripheral cutting edge portion 10B of the cutting tool 10.
- the open end 20c of the hole 20a on the back surface 20b side of the work material 20 is cut by the back surface cutting blade 1a of the back surface cutting edge portion 10A.
- the cutting tool 110 in the first comparative example is that the back cutting edge 1a of the back cutting edge portion 10A and the cutting edge 2a of the outer peripheral cutting edge portion 10B are straight blades. Different from the cutting tool 10 of the present embodiment. As shown in FIG. 4, in the cutting tool 120 in the second comparative example, each of the back cutting edge 1a of the back cutting edge portion 10A and the cutting edge 2a of the outer peripheral cutting edge portion 10B is a right twist blade. In this respect, it differs from the cutting tool 10 of the present embodiment.
- the cutting edge 2a is a straight blade, so that the cutting resistance increases during cutting and chatter vibration is likely to occur.
- the cutting resistance force on the back surface cutting blade 1 a is generated so as to be directed toward the shank portion 10 ⁇ / b> C along the rotation center C of the cutting tool 120 as indicated by an arrow A ⁇ b> 1.
- the cutting edge 2a is a right-handed cutting edge, the cutting force by the cutting edge 2a is generated in the direction of the shank portion 10C along the rotation center C of the cutting tool 120 as indicated by an arrow A3.
- the cutting force acting on the back surface cutting edge portion 10A and the cutting force acting on the outer peripheral cutting edge portion 10B work in the same direction. For this reason, the force which pulls up the workpiece 20 in the shank part 10C direction along the rotation center C of the cutting tool 120 acts largely. As a result, defects such as deformation of the work material 20, chatter vibration, and chipping are often caused.
- the cutting edge 2a is a left helix as shown in FIG.
- the cutting force by the cutting edge 2a is generated in the direction of the tip along the rotation center C of the cutting tool 120 as indicated by an arrow A2.
- a cutting resistance is generated in the back surface cutting edge portion 10A as indicated by the arrow A1 toward the shank portion 10C.
- the cutting force and the cutting force acting on the outer peripheral cutting edge portion 10B are opposite to each other.
- the cutting force and the cutting force cancel each other out as internal forces. For this reason, the effect that the cutting force applied to the work material 20 is reduced can be obtained, and problems such as deformation of the work material 20, chatter vibration, and chipping of the edge can be suppressed.
- the cutting resistance is reduced due to the torsional blade effect compared to a straight blade.
- cutting is performed by a force that is sandwiched from both sides. For this reason, the force which deform
- the cutting edge 2a is a left-handed twisting blade, the occurrence of burrs can also be suppressed on the inlet side of the hole 20a.
- the above effect obtained by the cutting tool of the present embodiment also works to suppress the peeling of the laminated structure when cutting a laminated composite material such as CFRP (Carbon Fiber Reinforced Plastics).
- CFRP Carbon Fiber Reinforced Plastics
- the cutting edge 2a of the outer peripheral cutting edge portion 10B extends linearly and is inclined at a minus angle. Thereby, cutting force can be made to work so that it may go to the front-end
- the twist angle of the cutting edge 2a of the outer peripheral cutting edge portion 10B is 3 ° or more and 30 ° or less. Thereby, the cutting force can be appropriately directed to the tip end side in the outer peripheral cutting edge portion 10B.
- the twist angle is less than 3 °, the cutting force toward the tip is insufficient.
- the twist angle exceeds 30 °, the contact length of the cutting edge becomes large and the resistance becomes too large.
- the back surface cutting edge portion 10A protrudes more outward than the outer peripheral cutting edge portion 10B, and the back surface cutting edge 1a is separated from the shank portion 10C, and therefore away from the rotation center C of the outer peripheral cutting edge portion 10B. Thereby, the back surface of the work material 20 can be removed.
- the cutting tool 10 further includes a bottom blade 10D positioned at the tip portion opposite to the shank portion 10C, drilling can be performed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
Description
本出願は、2016年11月15日に出願した日本特許出願である特願2016-222374号に基づく優先権を主張する。当該日本特許出願に記載された全ての記載内容は、参照によって本明細書に援用される。
このような刃型形状が複雑でかつ形状精度が必要とされるような場合には、直線的な切れ刃を有する工具にならざるをえないことが多い。しかし、直線的な切れ刃では、使用時に切削抵抗が大きくなり、ビビリ振動(Chatter Vibration)が生じることが多い。
[本開示の効果]
本開示の一態様によれば、被削材における変形、ビビリ振動、コバ欠けの発生を抑制可能な切削工具および切削加工方法を提供することができる。
まず、本発明の実施の形態の概要について説明する。
以下、図面に基づいて本発明の実施の形態の詳細について説明する。なお、以下の図面において同一または相当する部分には同一の参照番号を付し、その説明は繰返さない。
図1に示されるように、本実施の形態に係る切削工具10は、例えば総形エンドミルよりなる切削工具であって、シャンク部10Cと、裏面取刃部10Aと、外周切れ刃部10Bとを有している。
Claims (6)
- 総形エンドミルよりなる切削工具であって、
シャンク部と、
裏面取刃を有する裏面取刃部と、
前記シャンク部と前記裏面取刃部との間に位置し、かつ外周面に切れ刃を有する外周切れ刃部とを備え、
前記外周切れ刃部の前記切れ刃は、右刃左ねじれ刃である、切削工具。 - 前記外周切れ刃部の前記切れ刃は、直線状に延び、かつマイナス角度に傾斜している、請求項1に記載の切削工具。
- 前記外周切れ刃部の前記切れ刃におけるねじれ角度は3°以上30°以下である、請求項1または請求項2に記載の切削工具。
- 前記裏面取刃部は、前記外周切れ刃部よりも外周側に突き出しており、
前記裏面取刃は、前記シャンク部から離れるしたがって前記外周切れ刃部の回転中心から離れる、請求項1~請求項3のいずれか1項に記載の切削工具。 - 前記シャンク部と反対側の先端部に位置する底刃をさらに備えた、請求項1~請求項4のいずれか1項に記載の切削工具。
- 請求項1~請求項5のいずれか1項に記載の切削工具を用いた切削加工方法であって、
前記切削工具を前記シャンク部側から前記裏面取刃部を見る視点において、前記切削工具が時計回りに回転することで被削材を加工する、切削加工方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2019114463A RU2019114463A (ru) | 2016-11-15 | 2017-07-07 | Режущий инструмент и способ резания |
KR1020197012012A KR20190084955A (ko) | 2016-11-15 | 2017-07-07 | 절삭 공구 및 절삭 가공 방법 |
JP2018551025A JP6918013B2 (ja) | 2016-11-15 | 2017-07-07 | 切削工具および切削加工方法 |
EP17871628.8A EP3542937A4 (en) | 2016-11-15 | 2017-07-07 | CUTTING TOOL AND CUTTING METHOD |
US16/461,292 US20200070260A1 (en) | 2016-11-15 | 2017-07-07 | Cutting Tool and Cutting Method |
CN201780070033.5A CN109937108A (zh) | 2016-11-15 | 2017-07-07 | 切削刀具和切削方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016-222374 | 2016-11-15 | ||
JP2016222374 | 2016-11-15 |
Publications (1)
Publication Number | Publication Date |
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WO2018092351A1 true WO2018092351A1 (ja) | 2018-05-24 |
Family
ID=62145398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2017/024926 WO2018092351A1 (ja) | 2016-11-15 | 2017-07-07 | 切削工具および切削加工方法 |
Country Status (7)
Country | Link |
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US (1) | US20200070260A1 (ja) |
EP (1) | EP3542937A4 (ja) |
JP (1) | JP6918013B2 (ja) |
KR (1) | KR20190084955A (ja) |
CN (1) | CN109937108A (ja) |
RU (1) | RU2019114463A (ja) |
WO (1) | WO2018092351A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109590525A (zh) * | 2018-12-06 | 2019-04-09 | 东莞捷荣技术股份有限公司 | 一种手机中框专用复合立铣刀及手机中框铣削方法 |
JP2021074798A (ja) * | 2019-11-06 | 2021-05-20 | 株式会社ジーベックテクノロジー | 面取りカッターおよびワークの面取り方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102118378B1 (ko) * | 2018-03-07 | 2020-06-03 | 주식회사 엘지화학 | 절삭 장치 및 이를 이용한 필름 적층체의 면취 방법 |
DE102021128197A1 (de) | 2021-10-28 | 2023-05-04 | Andreas Vratny | Spiralisierter Entgrater |
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US1898732A (en) * | 1929-07-20 | 1933-02-21 | Krohne Gustav | Milling cutter |
JPH0294021U (ja) * | 1989-01-11 | 1990-07-26 | ||
JPH11156622A (ja) | 1997-11-25 | 1999-06-15 | Hitachi Tool Eng Ltd | 球状刃エンドミル |
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JP2016222374A (ja) | 2015-05-28 | 2016-12-28 | 京セラドキュメントソリューションズ株式会社 | 給紙カセット、およびこれを備えた画像形成装置 |
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DE628595C (de) * | 1933-04-30 | 1936-04-07 | Otto Weyel | Formfraeser fuer teils parallelwandige und teils pilzfoermige Nuten |
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2017
- 2017-07-07 JP JP2018551025A patent/JP6918013B2/ja active Active
- 2017-07-07 CN CN201780070033.5A patent/CN109937108A/zh active Pending
- 2017-07-07 WO PCT/JP2017/024926 patent/WO2018092351A1/ja active Application Filing
- 2017-07-07 RU RU2019114463A patent/RU2019114463A/ru not_active Application Discontinuation
- 2017-07-07 KR KR1020197012012A patent/KR20190084955A/ko unknown
- 2017-07-07 US US16/461,292 patent/US20200070260A1/en not_active Abandoned
- 2017-07-07 EP EP17871628.8A patent/EP3542937A4/en not_active Withdrawn
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US1898732A (en) * | 1929-07-20 | 1933-02-21 | Krohne Gustav | Milling cutter |
JPH0294021U (ja) * | 1989-01-11 | 1990-07-26 | ||
JPH11156622A (ja) | 1997-11-25 | 1999-06-15 | Hitachi Tool Eng Ltd | 球状刃エンドミル |
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JP2005131728A (ja) * | 2003-10-29 | 2005-05-26 | Osg Corp | 総形回転切削工具 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN109590525A (zh) * | 2018-12-06 | 2019-04-09 | 东莞捷荣技术股份有限公司 | 一种手机中框专用复合立铣刀及手机中框铣削方法 |
JP2021074798A (ja) * | 2019-11-06 | 2021-05-20 | 株式会社ジーベックテクノロジー | 面取りカッターおよびワークの面取り方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20190084955A (ko) | 2019-07-17 |
RU2019114463A (ru) | 2020-12-17 |
US20200070260A1 (en) | 2020-03-05 |
EP3542937A4 (en) | 2020-07-01 |
EP3542937A1 (en) | 2019-09-25 |
CN109937108A (zh) | 2019-06-25 |
JPWO2018092351A1 (ja) | 2019-10-10 |
JP6918013B2 (ja) | 2021-08-11 |
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