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Publication number
JP2013252588A
JP2013252588A JP2012129605A JP2012129605A JP2013252588A JP 2013252588 A JP2013252588 A JP 2013252588A JP 2012129605 A JP2012129605 A JP 2012129605A JP 2012129605 A JP2012129605 A JP 2012129605A JP 2013252588 A JP2013252588 A JP 2013252588A
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JP
Japan
Prior art keywords
cutting edge
cutting
angle
drill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2012129605A
Other languages
Japanese (ja)
Inventor
Yoshihiro Kondo

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Moldino Tool Engineering Ltd
Original Assignee
Hitachi Tool Engineering Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Tool Engineering Ltd filed Critical Hitachi Tool Engineering Ltd
Priority to JP2012129605A priority Critical patent/JP2013252588A/en
Publication of JP2013252588A publication Critical patent/JP2013252588A/en
Pending legal-status Critical Current

Abstract

PROBLEM TO BE SOLVED: To provide a quadruple angle drill that can prevent delamination or burr on end faces at an entrance side and an exit side of a hole by suppressing wear of a tool even when drilling in a high efficient cutting condition.SOLUTION: A quadruple angle drill has the relation of α1>α2>α3>α4, in which α1 is a first tip end angle that is formed by an opposite first cutting blade, α2 is a second tip end that is formed by an opposite second cutting blade, α3 is a third tip end angle that is formed by the opposite second cutting blade, and α4 is a fourth tip end angle that is formed by the opposite second cutting blade, when viewed in a cross section that passes a tool shaft, and is in parallel to the tool shaft.

Description

しかし、ＣＦＲＰはプラスチックなどの樹脂母材の中に炭素繊維を加えることにより強度を向上させているため、切削加工中においては工具の摩耗が早期に進行し、加工面においてはデラミネーション（剥離）やバリが発生してしまう。よって、通常の材料すなわち金属材料や樹脂材料と比較すると加工が非常に困難である。   However, since CFRP improves the strength by adding carbon fiber to a plastic base material such as plastic, the wear of the tool progresses early during cutting, and delamination (peeling) occurs on the processed surface. And burr will occur. Therefore, it is very difficult to process as compared with a normal material, that is, a metal material or a resin material.

このような課題を解決するために、従来文献にてＣＦＲＰの穴あけ加工に用いるドリルが開示されている。   In order to solve such a problem, a drill used for drilling CFRP is disclosed in the conventional literature.

しかしながら、本発明が対象としているＣＦＲＰの穴あけ加工においては、前述した通り、加工面におけるデラミネーション（剥離）及びバリの発生や、切削工具すなわちドリルにおける工具寿命の低下が大きな課題となっている。   However, in the drilling of CFRP, which is the subject of the present invention, as described above, delamination (burring) and burrs on the machined surface, and a reduction in tool life in a cutting tool, that is, a drill, are major issues.

すなわち、本発明は工具軸に沿って刃溝、リーディングエッジ、ランド及びマージンが設けられ、先端側には、直線状の第１切れ刃と、直線状の第２切れ刃と、直線状の第３切れ刃と、直線状の第４切れ刃とからなる主切れ刃が設けられたクアドラプルアングルドリルであって、工具を回転させて得られる投影図で見たときに、対向する第１切れ刃が成す第１先端角α１、対向する第２切れ刃が成す第２先端角α２、対向する第３切れ刃が成す第３先端角α３、及び対向する第４切れ刃が成す第４先端角α４は、α１＞α２＞α３＞α４の関係性にて設けられていることを特徴とするクアドラプルアングルドリルである。   That is, the present invention is provided with a blade groove, a leading edge, a land, and a margin along the tool axis, and a linear first cutting edge, a linear second cutting edge, and a linear first cutting edge are provided on the tip side. A quadruple angle drill provided with a main cutting edge comprising three cutting edges and a linear fourth cutting edge, the first cutting edges facing each other when viewed in a projection view obtained by rotating a tool A first tip angle α1, a second tip angle α2 formed by an opposing second cutting edge, a third tip angle α3 formed by an opposing third cutting blade, and a fourth tip angle α4 formed by an opposing fourth cutting blade. Is a quadruple angle drill provided with a relationship of α1> α2> α3> α4.

さらに、本発明は一枚の主切れ刃につき４つの直線状の切れ刃を設けたことから、それぞれの直線状の切れ刃に生ずる切削抵抗の差を低減し、摩耗の早期進行や工具寿命の低下を抑えることが可能となる。よって、複合材料における高能率な穴あけ加工を低コストで実現することが出来る。   Furthermore, since the present invention provides four linear cutting edges per main cutting edge, it reduces the difference in cutting resistance that occurs between the respective linear cutting edges, and promotes early wear and tool life. It is possible to suppress the decrease. Therefore, highly efficient drilling in the composite material can be realized at low cost.

また図１には、刃数が２枚刃のクアドラプルアングルドリルを示している。本発明においては、刃数を２〜３枚刃とすることがより望ましい。ここで、「刃数が２〜３枚刃」であるということは、主切れ刃７が２〜３枚設けられていることを指す。   FIG. 1 shows a quadruple angle drill having two blades. In the present invention, it is more desirable that the number of blades be 2 to 3 blades. Here, “the number of blades is 2 to 3 blades” means that 2 to 3 main cutting edges 7 are provided.

すなわち、第１切れ刃により形成される切り屑の厚さｔ１と、第２切れ刃により形成される切り屑の厚さｔ２と、第３切れ刃により形成される切り屑の厚さｔ３と、第４切れ刃により形成される切り屑の厚さｔ４との関係性が、ｔ１＞ｔ２＞ｔ３＞ｔ４の関係性となるようにそれぞれの切れ刃１０、１１、１２、１３が設けられている。よって、切削速度が高くなることに伴い、穴の加工面においてデラミネーション（剥離）やバリが発生する可能性が高くなる外周側での切削になるほど切り屑の厚さは小さくなるため、デラミネーション（剥離）やバリの発生を防ぐことが可能となる。外周側になるほど、切削加工により発生する切り屑の厚さは小さくなるため、外周側の切削抵抗も小さくすることが出来る。よって、一般的に穴あけ加工が困難であるといわれる複合材料においても、高能率な穴あけ加工を実現することが出来る。   That is, the thickness t1 of the chips formed by the first cutting edge, the thickness t2 of the chips formed by the second cutting edge, the thickness t3 of the chips formed by the third cutting edge, The respective cutting edges 10, 11, 12, and 13 are provided so that the relationship with the thickness t4 of the chips formed by the fourth cutting edge is a relationship of t1> t2> t3> t4. . Therefore, as the cutting speed increases, delamination (peeling) and burrs are more likely to occur on the processed surface of the hole. (Peeling) and generation of burrs can be prevented. Since the thickness of the chips generated by the cutting process becomes smaller toward the outer peripheral side, the cutting resistance on the outer peripheral side can also be reduced. Therefore, even in a composite material that is generally said to be difficult to drill, highly efficient drilling can be realized.

（実施例１）

Example 1
Using Comparative Example 1 and Conventional Example 2, a comparison test was performed on the processed surface of the hole when the CFRP was cut due to the difference in the number of linear cutting edges provided on one main cutting edge.

１ 本発明のドリル
２ 刃溝
３ リーディングエッジ
４ ランド
５ 第１マージン
６ 第２マージン
７ 主切れ刃
８ シャンク部
９ 刃部
１０ 第１切れ刃
１１ 第２切れ刃
１２ 第３切れ刃
１３ 第４切れ刃
１４ 第１切れ刃の逃げ面
１５ シンニング面
１６ 第２切れ刃の逃げ面
１７ 第３切れ刃の逃げ面
１８ 第４切れ刃の逃げ面
１９ 第１切れ刃の逃げ面の後端
２０ 第２切れ刃の逃げ面の後端
２１ 第３切れ刃の逃げ面の後端
α１ 第１先端角
α２ 第２先端角
α３ 第３先端角
α４ 第４先端角
ｔ１ 第１切れ刃により形成される切り屑の厚さ
ｔ２ 第２切れ刃により形成される切り屑の厚さ
ｔ３ 第３切れ刃により形成される切り屑の厚さ
ｔ４ 第４切れ刃により形成される切り屑の厚さ
Ｄ シャンク径
ｄ 刃径
ｆ １刃送り量
DESCRIPTION OF SYMBOLS 1 Drill of this invention 2 Cutting groove 3 Leading edge 4 Land 5 1st margin 6 2nd margin 7 Main cutting edge 8 Shank part 9 Cutting edge 10 1st cutting edge 11 2nd cutting edge 12 3rd cutting edge 13 4th cutting Blade 14 Flank of first cutting edge 15 Thinning surface 16 Flank of second cutting edge 17 Flank of third cutting edge 18 Flank of fourth cutting edge 19 Rear end of flank of first cutting edge 20 Second Rear end of flank of cutting edge 21 Rear end of flank of third cutting edge α1 First tip angle α2 Second tip angle α3 Third tip angle α4 Fourth tip angle t1 Chip formed by first cutting edge T2 Thickness of chips formed by the second cutting edge t3 Thickness of chips formed by the third cutting edge t4 Thickness of chips formed by the fourth cutting edge D Shank diameter d Blade Diameter f 1 blade feed amount

Claims (6)

A blade groove, a leading edge, a land, and a margin are provided along the tool axis, and on the tip side, a linear first cutting edge, a linear second cutting edge, and a linear third cutting edge, A quadruple angle drill provided with a main cutting edge comprising a linear fourth cutting edge,
When viewed in a projection view obtained by rotating the tool, the first tip angle α1 formed by the opposing first cutting edge, the second tip angle α2 formed by the opposing second cutting edge, and the opposing third cutting edge are The quadruple angle drill is characterized in that the third tip angle α3 formed and the fourth tip angle α4 formed by the opposed fourth cutting edge are provided in a relationship of α1>α2>α3> α4.

JP2012129605A 2012-06-07 2012-06-07 Quadruple angle drill Pending JP2013252588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012129605A JP2013252588A (en) 2012-06-07 2012-06-07 Quadruple angle drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012129605A JP2013252588A (en) 2012-06-07 2012-06-07 Quadruple angle drill

Publications (1)

Publication Number Publication Date
JP2013252588A true JP2013252588A (en) 2013-12-19

Family

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012129605A Pending JP2013252588A (en) 2012-06-07 2012-06-07 Quadruple angle drill

Country Status (1)

JP (1) JP2013252588A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014012317A (en) * 2012-07-05 2014-01-23 Sumitomo Electric Hardmetal Corp Drill
EP2946861A1 (en) 2014-05-22 2015-11-25 Fuji Jukogyo Kabushiki Kaisha Drill and method of manufacturing drill
US20170182565A1 (en) * 2014-05-20 2017-06-29 Natalino Capone Drilling tool
CN110394484A (en) * 2019-08-13 2019-11-01 厦门厦芝科技工具有限公司 A kind of three apex angular bit heads

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014012317A (en) * 2012-07-05 2014-01-23 Sumitomo Electric Hardmetal Corp Drill
US20170182565A1 (en) * 2014-05-20 2017-06-29 Natalino Capone Drilling tool
US10137506B2 (en) * 2014-05-20 2018-11-27 Natalino Capone Drilling tool
EP2946861A1 (en) 2014-05-22 2015-11-25 Fuji Jukogyo Kabushiki Kaisha Drill and method of manufacturing drill
CN105081413A (en) * 2014-05-22 2015-11-25 富士重工业株式会社 Drill and method of manufacturing drill
KR20150135130A (en) 2014-05-22 2015-12-02 후지 주코교 카부시키카이샤 Drill and method for manufacturing the same
US9827617B2 (en) 2014-05-22 2017-11-28 Subaru Corporation Drill and method of manufacturing drill
CN110394484A (en) * 2019-08-13 2019-11-01 厦门厦芝科技工具有限公司 A kind of three apex angular bit heads

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