WO1998056528A1 - Method of making endmills - Google Patents
Method of making endmills Download PDFInfo
- Publication number
- WO1998056528A1 WO1998056528A1 PCT/SE1998/001113 SE9801113W WO9856528A1 WO 1998056528 A1 WO1998056528 A1 WO 1998056528A1 SE 9801113 W SE9801113 W SE 9801113W WO 9856528 A1 WO9856528 A1 WO 9856528A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cbn
- shank
- endmill
- cemented carbide
- tenon
- Prior art date
Links
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
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1081—Shank-type cutters, i.e. with an integral shaft with permanently fixed cutting inserts
-
- 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
- B23C5/00—Milling-cutters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/34—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools milling cutters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/12—Boron nitride
- B23C2226/125—Boron nitride cubic [CBN]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2226/00—Materials of tools or workpieces not comprising a metal
- B23C2226/31—Diamond
- B23C2226/315—Diamond polycrystalline [PCD]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C2240/00—Details of connections of tools or workpieces
- B23C2240/08—Brazed connections
Definitions
- This invention relates to an endmill with cBN (cubic boron nitride) or PCD (polycrystalline diamond) in the cutting edges and a method of making the same.
- the purpose of the method is to decrease the cost compared to existing methods.
- An endmill is used for machining of grooves, pockets and slots and consists of a cylindrical holder with cutting means at the end. It can be made of high speed steel, or solid cemented carbide, but it can also consist of a steel holder with cemented carbide inserts as cutting means .
- metal cutting inserts having cutting edges formed of a superhard material, such as PCD are usually used for the machining of non-ferrous alloys such as brass, magnesium and aluminium, and the like, whereas inserts with cutting edges formed of a superhard abrasive, such as cBN are usually used for the machining of cast iron and hardened steel and the like.
- PCD or cBN endmills there are several types of PCD or cBN endmills on the market today. Essentially there are two different methods to manufacture them. One method includes sintering cBN or diamond powder under elevated pressure and temperature into a solid cylindrical body which is then brazed onto a shank and finished into an endmill . The other method includes bonding a layer of cBN or diamond under elevated pressure and temperature to a substrate, usually a cemented carbide disc, from which smaller pieces, "chips", are cut out. These chips are then brazed onto a cemented carbide rod and ground to the finished shape. Tools produced that way are normally quite expensive due to the many steps the product must undergo before it is finished.
- the object of the present invention is therefore to provide a method, where an endmill with several cutting edges can be achieved but at a substantially lower cost.
- Fig 1 shows the principle of the method where 1 is the element that will form the cutting part,
- FIG. 5 is a top view of the element 1 after shaping to expose the cutting edges.
- the starting point is a cemented carbide disc preferably with a binder phase content of >10 wt-% provided with superhard bodies according to the teachings of US 5,676,496.
- the cemented carbide disc is made from a cemented carbide rod with a circular, square, triangular or other suitable cross section preferably with a center hole.
- This rod one or more grooves are ground throughout its whole length and parallel to its axis.
- the groove can be straight but it can also be helical.
- the number of grooves and their location depend on the type of disc that is to be produced.
- the shape of the grooves can be made in different ways. It is important, however, that they have a rounded or plane shape. Their size shall be such that the cutting work essentially is performed by the superhard material . After HP/HT sintering the rod is cut into discs of desired thickness .
- cemented carbide discs at least one groove is ground and filled with a powder mixture containing cBN and/or diamond after which the discs are treated at a temperature and pressure where cBN and/or diamond is stable. During this treatment the discs are separated from each other in such a way that they do not sinter together.
- the shank 2 is preferably made in cemented carbide preferably with a binder phase content of >10 wt-%. The diameter of the shank is somewhat smaller than the diameter of the disc with superhard materials . The other end of the shank is provided with clamping means .
- the PCD/cBN disc is then brazed together with the shank .
- the end of the shank where the PCD/cBN disc is brazed is ground down to form a tenon, 4.
- the shape of the tenon is generally cylindrical but it may alternatively be tapered, square, triangular, elliptical or other non-round shape.
- the diameter (or equivalent) of the tenon is about 15 - 40 % of the diameter of the shank and is designed to fit within the center hole of the disc 1 although the tenon does not have to extend through the entire length of that center hole.
- the PCD/cBN disc is then brazed together with the shank using the tenon as guide and braze joint, 3. It is according to the invention essential that brazing is made only at the tenon. This will minimise the risk of braze joint failure.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Drilling Tools (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR19997011706A KR20010013691A (en) | 1997-06-13 | 1998-06-10 | Method of making endmills |
JP50229099A JP2002504027A (en) | 1997-06-13 | 1998-06-10 | End mill manufacturing method |
CA002290023A CA2290023A1 (en) | 1997-06-13 | 1998-06-10 | Method of making endmills |
EP98929975A EP0988125A1 (en) | 1997-06-13 | 1998-06-10 | Method of making endmills |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9702297-4 | 1997-06-13 | ||
SE9702297A SE512752C2 (en) | 1997-06-13 | 1997-06-13 | Ways to make stick cutters |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998056528A1 true WO1998056528A1 (en) | 1998-12-17 |
Family
ID=20407402
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1998/001113 WO1998056528A1 (en) | 1997-06-13 | 1998-06-10 | Method of making endmills |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0988125A1 (en) |
JP (1) | JP2002504027A (en) |
KR (1) | KR20010013691A (en) |
CN (1) | CN1260742A (en) |
CA (1) | CA2290023A1 (en) |
SE (1) | SE512752C2 (en) |
WO (1) | WO1998056528A1 (en) |
ZA (1) | ZA985147B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2892326A1 (en) * | 2005-10-24 | 2007-04-27 | Sofdiam Soc Par Actions Simpli | Hard material e.g. infonel, cutter for forming chamfer on rivet of airplane wing, has support and monoblock cutting tip integrated with each other by brazing and respectively made of basis steel and carbide |
WO2015198361A1 (en) * | 2014-06-23 | 2015-12-30 | Sumitomo Electric Hardmetal Corp. | Cutting tool and method of manufacturing a cutting tool |
CN105458641A (en) * | 2016-01-06 | 2016-04-06 | 倍兹(上海)精密刀具有限公司 | Manufacturing method for integral PCD cutters applied to small-diameter hole manufacturing |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100423006B1 (en) * | 2001-07-18 | 2004-03-12 | 프리시젼다이아몬드 주식회사 | A blade manufactureing method of a ball cutter and the blade thereof |
DE10159431B4 (en) * | 2001-12-04 | 2005-10-20 | Mapal Fab Praezision | Tool for finishing surfaces |
WO2011084864A2 (en) | 2009-12-31 | 2011-07-14 | Diamond Innovations, Inc. | Machining tool blank |
CN107952986A (en) * | 2016-10-17 | 2018-04-24 | 上海精韧激光科技有限公司 | For manufacturing the blank and its manufacture method of cutting element |
CN108262495A (en) * | 2016-12-31 | 2018-07-10 | 上海名古屋精密工具股份有限公司 | For the blank and its manufacturing method of ultra-hard cutting tool manufacture |
KR102249490B1 (en) * | 2019-10-18 | 2021-05-12 | 한국오에스지 주식회사 | Structure of insert for ball end mill |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0458434A2 (en) * | 1990-05-24 | 1991-11-27 | Smith International, Inc. | Rotary cutter with Diamond-like cutting edges |
EP0744242A2 (en) * | 1995-05-22 | 1996-11-27 | Sandvik Aktiebolag | Metal cutting inserts having superhard abrasive bodies and methods of making same |
-
1997
- 1997-06-13 SE SE9702297A patent/SE512752C2/en not_active IP Right Cessation
-
1998
- 1998-06-10 CN CN98806156A patent/CN1260742A/en active Pending
- 1998-06-10 JP JP50229099A patent/JP2002504027A/en active Pending
- 1998-06-10 KR KR19997011706A patent/KR20010013691A/en not_active Application Discontinuation
- 1998-06-10 CA CA002290023A patent/CA2290023A1/en not_active Abandoned
- 1998-06-10 WO PCT/SE1998/001113 patent/WO1998056528A1/en not_active Application Discontinuation
- 1998-06-10 EP EP98929975A patent/EP0988125A1/en not_active Withdrawn
- 1998-06-12 ZA ZA985147A patent/ZA985147B/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0458434A2 (en) * | 1990-05-24 | 1991-11-27 | Smith International, Inc. | Rotary cutter with Diamond-like cutting edges |
EP0744242A2 (en) * | 1995-05-22 | 1996-11-27 | Sandvik Aktiebolag | Metal cutting inserts having superhard abrasive bodies and methods of making same |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2892326A1 (en) * | 2005-10-24 | 2007-04-27 | Sofdiam Soc Par Actions Simpli | Hard material e.g. infonel, cutter for forming chamfer on rivet of airplane wing, has support and monoblock cutting tip integrated with each other by brazing and respectively made of basis steel and carbide |
WO2015198361A1 (en) * | 2014-06-23 | 2015-12-30 | Sumitomo Electric Hardmetal Corp. | Cutting tool and method of manufacturing a cutting tool |
CN106573314A (en) * | 2014-06-23 | 2017-04-19 | 住友电工硬质合金株式会社 | Cutting tool and method of manufacturing a cutting tool |
US10040126B2 (en) | 2014-06-23 | 2018-08-07 | Sumitomo Electric Hardmetal Corp. | Cutting tool and method of manufacturing a cutting tool |
CN105458641A (en) * | 2016-01-06 | 2016-04-06 | 倍兹(上海)精密刀具有限公司 | Manufacturing method for integral PCD cutters applied to small-diameter hole manufacturing |
Also Published As
Publication number | Publication date |
---|---|
KR20010013691A (en) | 2001-02-26 |
SE9702297D0 (en) | 1997-06-13 |
SE512752C2 (en) | 2000-05-08 |
CA2290023A1 (en) | 1998-12-17 |
SE9702297L (en) | 1998-12-14 |
ZA985147B (en) | 1999-01-20 |
JP2002504027A (en) | 2002-02-05 |
EP0988125A1 (en) | 2000-03-29 |
CN1260742A (en) | 2000-07-19 |
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