CN1891385A - 麻花钻 - Google Patents
麻花钻 Download PDFInfo
- Publication number
- CN1891385A CN1891385A CNA2006101031375A CN200610103137A CN1891385A CN 1891385 A CN1891385 A CN 1891385A CN A2006101031375 A CNA2006101031375 A CN A2006101031375A CN 200610103137 A CN200610103137 A CN 200610103137A CN 1891385 A CN1891385 A CN 1891385A
- Authority
- CN
- China
- Prior art keywords
- cutting
- fluted drill
- leading edge
- cutting edge
- sword radius
- 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
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 40
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000007787 solid Substances 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 3
- 239000010935 stainless steel Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 abstract description 5
- 241001074085 Scophthalmus aquosus Species 0.000 description 8
- 238000000576 coating method Methods 0.000 description 5
- 210000001161 mammalian embryo Anatomy 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000002262 irrigation Effects 0.000 description 2
- 238000003973 irrigation Methods 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 229910010037 TiAlN Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/0002—Drills with connected cutting heads, e.g. with non-exchangeable cutting heads; Drills with a single insert extending across the rotational axis and having at least two radially extending cutting edges in the working position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/12—Cross sectional views of the cutting edges
- B23B2251/125—Rounded cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/12—Cross sectional views of the cutting edges
- B23B2251/127—Sharp cutting edges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/78—Tool of specific diverse material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
本发明涉及用于金属切削的由固体烧结碳化物制成麻花钻,包括延伸穿过整个主体或其一部分的螺旋容屑槽(2)、将固定到旋转主轴上的钻柄(3)、两个主切削刃(5)和两个前缘(7)。如果前缘(7)具有比切削刃(5)更大的刃半径,就会获得工具寿命的意外增加。本发明还涉及一种用于制造这种钻的方法和这种钻用于钻钢和不锈钢的应用。
Description
本发明涉及用于金属切削操作的麻花钻。这种钻通常具有被分成轴和切削部分的圆柱形基本部件。在切削部分的表面中形成容屑槽。钻具有主切削刃和前缘。
烧结碳化物麻花钻是由圆柱形胚件制造的,圆柱形胚件通过磨削至期望的形状和尺寸特别是形成切削刃和排屑槽而机械加工而成。通过磨削,就形成了锋利的刃。
固体烧结碳化物钻通常大多在切削刃的***处磨损。这可以通过下列事实来解释:切削速度在***处较高并且因此由于在该区域中生成较高温度所以连续的磨损机制作用更加迅速。然而,不连续的磨损机制通常是***内磨损的原因,例如在主切削刃上作用的粘附性磨损最终会导致刃的破损。为了抑制粘附性磨损,切削刃制作得尽可能锋利以减小切削力。
本发明的一个目的是提供一种具有增加的工具寿命的麻花钻。
本发明的另一个目的是提供了一种在主切削刃和前缘之间的拐角中具有降低的磨损的麻花钻。
另一个目的是提供一种制造具有增加的工具寿命的麻花钻的方法。
现已令人吃惊地发现,如果在拐角附近的前缘经过边角修圆操作,就会获得具有提高的工具寿命的麻花钻。
图1是依照本发明的实施例的麻花钻;
图2以大约20X的放大倍率显示了依照本发明的麻花钻的磨损图案;并且
图3以大约20X的放大倍率显示了依照现有技术的麻花钻的磨损图案。
在如图1所示的依照本发明的麻花钻中,钻1由坚固的烧结碳化物制成并且包括延伸穿过整个钻主体或穿过其一部分的螺旋容屑槽2。钻具有将固定到未显示的旋转主轴上的钻柄3。钻具有两个上余隙面4、两个主切削刃5和两个前缘7。钻可以配设有两个冲洗通道6,冲洗通道延伸穿过整个钻以将冲洗介质从轴传输至钻的尖端。
主切削刃5尽可能的锋利且具有小于10微米的刃半径。在各自的拐角8附近以切削刃5形成的前缘7具有的刃半径大于切削刃的刃半径,优选地至少为切削刃的刃半径大小的两倍并且在10和200微米之间,且优选地在10和100微米之间。要进行倒角的前缘的长度L至少为1毫米,优选为3毫米并且优选小于10毫米。
钻可以没有涂层,或者配设有单个或多个涂层,如本领域已知的那样。
本发明还提供了一种制造麻花钻的方法,包括提供圆柱形胚件、通过磨削机器加工胚件以形成麻花钻1,且麻花钻1包括容屑槽2和前缘7。依照本发明,在切削刃5附近的拐角8的前缘7随后经过边角修圆操作以具有比切削刃的刃半径更大的刃半径,优选地至少为切削刃的刃半径大小的两倍并且在10和200微米之间,且优选地在10和100微米之间。要进行倒角的前缘的长度L至少为1毫米,优选为3毫米并且优选小于10毫米。
本发明还提供了钻1在钢和不锈钢中以典型的Vc=50-150m/min的切割速度和f=0.10-0.50mm/rev的进给量进行钻孔的应用。
尽管已经参照具有两个切削刃和前缘的麻花钻对本发明进行了描述,但是很显然,它也可以应用到具有三个或更多这种刃的麻花钻上。
实例1
选择了多个具有锋利的切削刃和前缘的烧结碳化物麻花钻,这些麻花钻是按照标准过程制造的,具有8毫米的直径,组分为WC=89.5wt-%,Co=10.0wt-%,以及Cr3C2=0.45wt-%,并且具有1600HV3的硬度。一半的钻经过前缘的进一步的边角修圆操作以在与切削刃的拐角相距3毫米的距离处具有30-50微米的刃半径。然后所有的钻在相同的涂层批次中涂敷3微米厚的TiAlN型的PVD涂层。
实例2
来自实例1的麻花钻在下列试验状态下在钢中经受机械切削试验:
加工材料:韧性硬化钢SS2244(类似于AISI 4140)。
切削数据:
切削速度Vc=70m/min
进给量f=0.15mm/rev
孔的深度a=18毫米,通孔
工具寿命标准:在切削刃和前缘之间的拐角处破损。
得到如下的结果:
工具寿命
孔的数目
依照现有技术的钻:250和200
依照本发明的钻:1300和1350
图2中显示了依照本发明的钻在钻了500个孔之后的典型磨损图案,并且在图3中显示了现有技术中的钻在钻了200-250个孔之后的典型磨损图案。
Claims (9)
1.一种用于金属切削的由固体烧结碳化物制成的麻花钻,包括延伸穿过整个主体或其一部分的螺旋容屑槽(2)、将固定到旋转主轴上的钻柄(3)、两个主切削刃(5)和两个前缘(7),其特征在于,所述前缘(7)具有比切削刃(5)更大的刃半径,优选地大于切削刃(5)的刃半径的两倍。
2.如上述权利要求中任一项所述的麻花钻,其特征在于,切削刃具有小于10微米的刃半径。
3.如上述权利要求中任一项所述的麻花钻,其特征在于,前缘具有10-200微米的刃半径。
4.如上述权利要求中任一项所述的麻花钻,其特征在于,前缘的边角修圆从拐角延伸至少1毫米并且优选延伸3毫米。
5.一种通过磨削来制造用于金属切削的由固体烧结碳化物制成的麻花钻的方法,所述麻花钻包括至少两个延伸穿过整个主体或其一部分的螺旋容屑槽(2)、将固定到旋转主轴上的钻柄(3)、两个主切削刃(5)和两个前缘(7),其特征在于,所述前缘经过后续的边角修圆操作以具有比切削刃(5)更大的刃半径,优选地是切削刃(5)的刃半径的两倍。
6.如权利要求5所述的方法,其特征在于,切削刃具有小于10微米的刃半径。
7.如权利要求5和6中的任一项所述的方法,其特征在于,前缘具有10-200微米的刃半径。
8.如权利要求5、6和7中的任一项所述的方法,其特征在于,前缘的边角修圆从拐角延伸至少1毫米并且优选延伸3毫米。
9.如权利要求1-4所述的麻花钻在50-150m/min的切削速度和0.10-0.50mm/rev的进给量下钻钢和不锈钢中的应用。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0501562A SE528917C2 (sv) | 2005-07-05 | 2005-07-05 | Spiralborr |
SE05015623 | 2005-07-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN1891385A true CN1891385A (zh) | 2007-01-10 |
Family
ID=37087779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNA2006101031375A Pending CN1891385A (zh) | 2005-07-05 | 2006-07-05 | 麻花钻 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7722299B2 (zh) |
EP (1) | EP1741507B1 (zh) |
JP (1) | JP2007015100A (zh) |
KR (1) | KR20070005871A (zh) |
CN (1) | CN1891385A (zh) |
IL (1) | IL176531A0 (zh) |
SE (1) | SE528917C2 (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102773527A (zh) * | 2012-08-23 | 2012-11-14 | 方水清 | 一种新型数控麻花钻 |
CN110090962A (zh) * | 2018-01-31 | 2019-08-06 | 米巴精密零部件(中国)有限公司 | 用于制造同步毂的方法 |
Families Citing this family (13)
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DE102007050050A1 (de) * | 2007-10-17 | 2009-04-23 | Kennametal Inc. | Rundlaufwerkzeug, insbesondere Bohrer |
DE102009039170B4 (de) | 2009-08-27 | 2022-01-20 | Kennametal Inc. | Bohrwerkzeug |
USD665431S1 (en) * | 2012-02-22 | 2012-08-14 | Hon Hai Precision Industry Co., Ltd. | Cutting tool |
CN103934489A (zh) * | 2013-11-26 | 2014-07-23 | 李仕清 | 一种钣金螺旋凹槽麻花钻的自降温技术及其加工方法 |
CN104084626A (zh) * | 2013-11-26 | 2014-10-08 | 李仕清 | 一种机加麻花钻的自降温技术及其加工方法 |
CN104084627A (zh) * | 2013-11-26 | 2014-10-08 | 李仕清 | 一种机加螺旋内倾槽麻花钻的自降温技术及其加工方法 |
EP3195967B1 (en) * | 2014-09-19 | 2018-08-01 | Sumitomo Electric Hardmetal Corp. | Drill |
US10486121B2 (en) | 2016-03-04 | 2019-11-26 | Shorefield Holdings, LLC | Mixing assembly for mixing a product |
US10506897B2 (en) | 2016-03-04 | 2019-12-17 | Shorefield Holdings, LLC | Mixing assembly for mixing a product |
USD814850S1 (en) * | 2016-03-04 | 2018-04-10 | Shorefield Holdings, LLC | Mixer |
US10836557B2 (en) | 2016-04-23 | 2020-11-17 | Shorefield Holdings Llc | Insulated bottle |
USD822730S1 (en) | 2017-04-07 | 2018-07-10 | Shorefield Holdings, LLC | Mixing structure |
US11679442B2 (en) | 2018-06-22 | 2023-06-20 | Maestro Logistics, Llc | Drill bit and method for making a drill bit |
Family Cites Families (22)
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US2966081A (en) * | 1959-03-18 | 1960-12-27 | United Greenfield Corp | Drill |
JPS59219108A (ja) | 1983-05-25 | 1984-12-10 | Sumitomo Electric Ind Ltd | ドリル |
JPS6017912U (ja) * | 1983-07-12 | 1985-02-06 | 住友電気工業株式会社 | 超硬ドリル |
JPS60141415A (ja) * | 1983-12-28 | 1985-07-26 | Toshiba Tungaloy Co Ltd | 小径ドリル |
EP0249104B1 (de) * | 1986-06-07 | 1992-01-29 | Hertel Aktiengesellschaft Werkzeuge + Hartstoffe | Verfahren zum Anschleifen eines Spiralbohrers |
US5230593A (en) * | 1987-12-14 | 1993-07-27 | Mitsubishi Kinzoku Kabushiki Kaisha | Twist drill |
DE3853518T3 (de) * | 1987-12-14 | 2004-06-03 | Mitsubishi Materials Corp. | Spiralbohrer. |
SE507842C2 (sv) * | 1992-09-24 | 1998-07-20 | Sandvik Ab | Borr |
US5609447A (en) * | 1993-11-15 | 1997-03-11 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit |
CA2153881A1 (en) | 1993-11-15 | 1995-05-26 | Robert W. Britzke | Surface decarburization of a drill bit having a refined primary cutting edge |
US5628837A (en) * | 1993-11-15 | 1997-05-13 | Rogers Tool Works, Inc. | Surface decarburization of a drill bit having a refined primary cutting edge |
DE4424885A1 (de) * | 1994-07-14 | 1996-01-18 | Cerasiv Gmbh | Vollkeramikbohrer |
TW299385B (en) * | 1994-12-12 | 1997-03-01 | Black & Decker Inc | Cutting tools for drilling concrete, aggregate, masonry or the like materials |
GB9606370D0 (en) | 1996-03-26 | 1996-06-05 | Dormer Tools Sheffield Ltd | Improvements in or relating to twist drills |
JP2000052121A (ja) * | 1998-08-03 | 2000-02-22 | Hitachi Tool Engineering Ltd | 刃先処理したツイストドリル及びその刃先処理方法 |
JP2002172506A (ja) * | 2000-12-05 | 2002-06-18 | Hitachi Tool Engineering Ltd | 被覆ツイストドリル |
DE10204105A1 (de) * | 2002-02-01 | 2003-08-28 | Kennametal Inc | Rundlaufschneidwerkzeug |
JP2003300110A (ja) * | 2002-04-03 | 2003-10-21 | Osg Corp | ドリルおよびその製造方法 |
FR2861001B1 (fr) * | 2003-10-16 | 2007-06-22 | Snecma Moteurs | Foret ceramique pour percage grande vitesse |
DE202004010977U1 (de) * | 2004-05-28 | 2005-10-13 | Kennametal Inc. | Bohrer, insbesondere Spiralbohrer |
JP2006192510A (ja) * | 2005-01-11 | 2006-07-27 | Nachi Fujikoshi Corp | ツイストドリル |
FR2919212B1 (fr) * | 2007-07-26 | 2009-12-25 | Snecma | Foret ceramique pour percage grande vitesse de materiaux composites. |
-
2005
- 2005-07-05 SE SE0501562A patent/SE528917C2/sv not_active IP Right Cessation
-
2006
- 2006-05-26 US US11/441,346 patent/US7722299B2/en not_active Expired - Fee Related
- 2006-06-20 EP EP06445048.9A patent/EP1741507B1/en not_active Not-in-force
- 2006-06-25 IL IL176531A patent/IL176531A0/en unknown
- 2006-07-04 JP JP2006184217A patent/JP2007015100A/ja active Pending
- 2006-07-04 KR KR1020060062367A patent/KR20070005871A/ko not_active Application Discontinuation
- 2006-07-05 CN CNA2006101031375A patent/CN1891385A/zh active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102773527A (zh) * | 2012-08-23 | 2012-11-14 | 方水清 | 一种新型数控麻花钻 |
CN110090962A (zh) * | 2018-01-31 | 2019-08-06 | 米巴精密零部件(中国)有限公司 | 用于制造同步毂的方法 |
Also Published As
Publication number | Publication date |
---|---|
IL176531A0 (en) | 2006-10-05 |
US20070009336A1 (en) | 2007-01-11 |
EP1741507B1 (en) | 2013-05-29 |
SE0501562L (sv) | 2007-01-06 |
EP1741507A1 (en) | 2007-01-10 |
KR20070005871A (ko) | 2007-01-10 |
US7722299B2 (en) | 2010-05-25 |
SE528917C2 (sv) | 2007-03-13 |
JP2007015100A (ja) | 2007-01-25 |
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KR200237198Y1 (ko) | 고속 가공용 엔드밀 |
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