EP1436121A1 - Abrasivelement für bohrkronen von hohlbohrern - Google Patents
Abrasivelement für bohrkronen von hohlbohrernInfo
- Publication number
- EP1436121A1 EP1436121A1 EP02801868A EP02801868A EP1436121A1 EP 1436121 A1 EP1436121 A1 EP 1436121A1 EP 02801868 A EP02801868 A EP 02801868A EP 02801868 A EP02801868 A EP 02801868A EP 1436121 A1 EP1436121 A1 EP 1436121A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- abrasive element
- water jet
- cutting
- abrasive
- gate
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D99/00—Subject matter not provided for in other groups of this subclass
- B24D99/005—Segments of abrasive wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/08—Honing tools
- B24B33/086—Abrading blocks for honing tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
Definitions
- the invention relates to an abrasive element, which can be used in particular for drill bits of hollow drills, with a sintered metal matrix in which cutting materials are embedded or embedded. Furthermore, the invention relates to a method for producing such an abrasive element.
- Such abrasive elements are used in particular in drill bits for stone processing, e.g. B. used in core drills.
- EP 0 857 552 B1 shows such an abrasive element, in which diamond crystals are incorporated as cutting materials in a sintered metal matrix.
- the surface intended for the material processing generally has a smooth surface before it is used.
- the abrasive elements initially show poor drilling behavior or cutting behavior due to the smooth surface, which only improves over time when metal is rubbed off and cutting materials are partially exposed. This problem is known as the gating or tapping problem.
- EP 0 857 552 shows an abrasive element of the type mentioned at the outset, which is formed in a gate zone with a roof profile, by means of which the gate behavior compared to a rectangular surface, a different composition with increased wear compared to the regular part of the abrasive element is formed at the gate zone.
- the invention has for its object to provide an abrasive element of the type mentioned with improved gate behavior with relatively little effort.
- the abrasive element should advantageously be inexpensive to manufacture.
- a method for producing such an abrasive element is to be specified.
- the surface of the abrasive element has a cut surface which is produced by a water jet treatment or a water jet cutting process.
- this object is achieved in the method mentioned at the beginning by producing a cut surface on a sintered body with a metal matrix and embedded or embedded cutting materials by means of a water jet treatment or a water jet cutting method.
- the invention is based on the knowledge that the metal matrix can be selectively removed in a water jet treatment or a water jet cutting process without the cutting materials, in particular diamond crystals, being damaged in the process.
- the generated Cut surface has advantages over cut surfaces generated by other manufacturing techniques:
- the cut surfaces Compared to the manufacture of abrasive elements by a sintering process without post-processing, the cut surfaces have an increased proportion of protruding diamond grains. Furthermore, a more cost-effective design can be achieved if a sintered body is separated into two abrasive elements by means of a cutting process, in which the respective separating cut surface can be used directly as a cut surface.
- the cutting materials are treated more gently by the water jet cutting process. While damage to the diamond crystals can occur in a laser cutting process due to the high local heat, such damage does not occur during water jet cutting, which selectively removes the softer metal matrix.
- the selective removal of the soft metal matrix produces cut surfaces with a high projection of the cutting materials, in particular the diamond crystals, which have a significantly improved cutting or drilling behavior.
- These cutting materials are still firmly incorporated in the metal matrix, since the metal matrix does not experience any deterioration in the structure in the area of the cut surface. B. in a laser cutting process.
- other cutting materials e.g. B. drilling carbide or silicon carbide crystals can be used instead of diamond crystals or in mixtures with diamond crystals.
- abrasives can be added to the water.
- the gate surface can be flat or uneven, e.g. B. with concave and convex areas, in particular wave-shaped, to thereby achieve the above areas to improve the gating behavior.
- To form a wavy cut surface only the water jet has to be guided in a corresponding curve instead of a straight line.
- Figure 1 is a sectional view of an abrasive element according to an embodiment of the invention.
- FIG. 2 shows a sintered body from which the abrasive element shown in FIG. 1 is produced according to a method according to the invention
- Fig. 3 shows a modified embodiment compared to FIG. 2.
- Fig. 1 shows an abrasive element 2 for drill bits of hollow drills with a sintered metal matrix 4, the z. B. is made by powder metallurgy and embedded in the cutting materials, in particular diamond crystals 6.
- An outer surface 8 of the abrasive element 2 has one through
- Water jet cutting process produced or treated by water jetting gate surface 8, which has diamond crystals 6 partially exposed by the water jet cutting process or by water jet treatment.
- a sintered body 12 with the sintered metal matrix 4 and the embedded diamond crystals 6 is first produced to produce such an abrasive element 2. Then the sintered body 12 is formed by a
- Sintered body 12 is divided into two abrasive elements 11, 11 'by a corrugated cutting line S2, each of which has corrugated or corrugated cut surfaces 14, 16 with convex regions 18 and concave regions 17. This increases the surface pressure.
- part of the diamond crystals 6 lying in the cutting line S2 protrudes from the relevant gate surface after the cutting process. Overall, this results in a further improved gate retention. Such good gate behavior is particularly evident from protruding diamond crystals in the convex, ie. H. areas 18 arched outwards.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10151802A DE10151802B4 (de) | 2001-10-19 | 2001-10-19 | Verfahren zu Herstellung eines Abrasivelementes für Bohrkronen von Hohlbohrern |
DE10151802 | 2001-10-19 | ||
PCT/EP2002/010494 WO2003035326A1 (de) | 2001-10-19 | 2002-09-19 | Abrasivelement für bohrkronen von hohlbohrern |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1436121A1 true EP1436121A1 (de) | 2004-07-14 |
EP1436121B1 EP1436121B1 (de) | 2005-05-11 |
Family
ID=7703141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02801868A Expired - Lifetime EP1436121B1 (de) | 2001-10-19 | 2002-09-19 | Verfahren zur Herstellung eines Abrasivelementes, insbesondere für Bohrkronen von Hohlbohrern |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1436121B1 (de) |
AT (1) | ATE295246T1 (de) |
DE (2) | DE10151802B4 (de) |
WO (1) | WO2003035326A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105458952A (zh) * | 2015-12-29 | 2016-04-06 | 河南广度超硬材料有限公司 | 冰砂轮及其制造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1179525B (de) * | 1959-10-09 | 1964-10-15 | Diamant Boart Sa | Drehbohrschneide fuer Gesteinsbohrer |
US5791330A (en) * | 1991-06-10 | 1998-08-11 | Ultimate Abrasive Systems, L.L.C. | Abrasive cutting tool |
DE4313154A1 (de) * | 1993-04-22 | 1994-10-27 | Demuth Alfred | Verfahren zur Herstellung von Schneidelementen für Bohr- oder Trennwerkzeuge |
DE19652208A1 (de) * | 1995-12-20 | 1997-06-26 | Amic Ind Ltd | Bohrer |
US6196911B1 (en) * | 1997-12-04 | 2001-03-06 | 3M Innovative Properties Company | Tools with abrasive segments |
EP1133379B1 (de) * | 1998-11-23 | 2003-07-09 | Ultimate Abrasive Systems, L.L.C. | Verfahren zur herstellung gesinterter teile |
AU3971501A (en) * | 1999-12-03 | 2001-06-18 | Ultimate Abrasive Systems, L.L.C. | Process for making an abrasive sintered product |
-
2001
- 2001-10-19 DE DE10151802A patent/DE10151802B4/de not_active Expired - Fee Related
-
2002
- 2002-09-19 WO PCT/EP2002/010494 patent/WO2003035326A1/de not_active Application Discontinuation
- 2002-09-19 EP EP02801868A patent/EP1436121B1/de not_active Expired - Lifetime
- 2002-09-19 AT AT02801868T patent/ATE295246T1/de not_active IP Right Cessation
- 2002-09-19 DE DE50203112T patent/DE50203112D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO03035326A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE295246T1 (de) | 2005-05-15 |
DE10151802B4 (de) | 2006-05-04 |
EP1436121B1 (de) | 2005-05-11 |
DE50203112D1 (de) | 2005-06-16 |
WO2003035326A1 (de) | 2003-05-01 |
DE10151802A1 (de) | 2003-05-08 |
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