US5431072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbide cutting tip coating with hard material and method of producing it
Assignee: August Beck GmbH and Co KG
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Filing: 1989-08-04
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Granted: 1995-07-11
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Expires: 2009-08-04
Abstract
Abstract The tool face 12 and the flank 13 as well as the cutting edge 14 of a carbide cutting tip 19 for the fine machining of bores or the like are coated with a thin hard-material coating 21, 22 of TiC or TiCN by the PVD method and this coating is not partly ground off again subsequently, as practiced in cutting tips coated by the CVD method to restore a shaper cutting edge. As a result of the fully retained coating, inter alia both the flank wear is reduced and the chip flow over the toll face is improved, which produces an excellent surface quality of a bore. The cutting tip is especially suitable for single-blade reamers.
Inventors
- 👤 Klaus Christoffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:00
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/28; B23P15/30; C; C23; C23C; C23C14/00; C23C14/06; C23C14/0641; C23C14/0664; Y; Y10; Y10T; Y10T407/00; Y10T407/27; Y10T408/00; Y10T408/78
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
133 words
A method of producing a carbide cutting tip having a flank, a tool face, a cutting edge provided at the transition between said flank and said tool face, and a than, hard material coating which contains titanium and nitrogen, and which is deposited on said flank, said tool face and in the area of said cutting edge, comprising: treating said cutting tip in a PVD installation, depositing a hard coating of material containing titanium and nitrogen by the PVD method on said carbide cutting tip, depositing a substantially thinner coating of said hard material at the transition between said flank and said tool face than on the adjoining flank and tool face, and retaining said substantially thinner hard material coating at the transition between said flank and said tool face without subsequent removal.
Claim 2
Independent Claim
133 words
A method of producing a carbide cutting tip having a flank, a tool face, a cutting edge provided at the transition between said flank and said tool face, and a than, hard material coating which contains titanium and nitrogen, and which is deposited on said flank, said tool face and in the area of said cutting edge, comprising: treating said cutting tip in a PVD installation, depositing a hard coating of material containing titanium and nitrogen by the PVD method on said carbide cutting tip, depositing a substantially thinner coating of said hard material at the transition between said flank and said tool face than on the adjoining flank and tool face, and retaining said substantially thinner hard material coating at the transition between said flank and said tool face without subsequent removal.
Claim 3
Dependent Claim
25 words
Method as claimed in claim 1, comprising treating said cutting tip for a duration appropriate to provide a coating thickness of less than 4 μm.
Claim 4
Dependent Claim
17 words
Method as claimed in claim 1, including chemically cleaning the surface of the cutting tip several times.
Claim 5
Dependent Claim
21 words
Method as claimed in claim 1, including cleaning the surface of the cutting tip without contacting said tip with ultrasonic waves.
Claim 6
Dependent Claim
114 words
In a carbide cutting tip, having a flank, a tool face, a cutting edge provided at the transition between the flank and the tool face, and a thin hard material coating that contains titanium and nitrogen deposited on the flank, the tool face and in an area of the cutting edge, the improvement wherein: a) the hard material coating that contains titanium and nitrogen is deposited by the PVD method, b) a substantially thinner coating of hard-material is deposited at the transition between the flank and the tool face in the area of the cutting edge than on the adjoining flank and tool face, and c) the hard material coating is not subsequently removed.
Claim 7
Dependent Claim
114 words
In a carbide cutting tip, having a flank, a tool face, a cutting edge provided at the transition between the flank and the tool face, and a thin hard material coating that contains titanium and nitrogen deposited on the flank, the tool face and in an area of the cutting edge, the improvement wherein: a) the hard material coating that contains titanium and nitrogen is deposited by the PVD method, b) a substantially thinner coating of hard-material is deposited at the transition between the flank and the tool face in the area of the cutting edge than on the adjoining flank and tool face, and c) the hard material coating is not subsequently removed.
Claim 8
Dependent Claim
17 words
The cutting tip as claimed in claim 5, comprising carbide having a K-quality according to ISO classification.
Claim 9
Dependent Claim
16 words
The cutting tip as claimed in claim 6, comprising carbide having a K05 to K20 quality.
Claim 10
Dependent Claim
14 words
The cutting tip as claimed in claim 7, comprising carbide having a K10 quality.
Claim 11
Dependent Claim
28 words
The cutting tip as claimed in claim 5, wherein at least one of the flank and the tool face has a surface quality of Rz smaller than 0.5.
Claim 12
Dependent Claim
27 words
The cutting tip as claimed in claim 9, wherein at least one of the flank and the tool face has a surface quality no greater than 0.3.
Claim 13
Dependent Claim
27 words
The cutting tip as claimed in claim 10, wherein at least one of the flank and the tool face has a surface quality no greater than 0.1.
Claim 14
Dependent Claim
19 words
The cutting tip as claimed in claim 5, wherein the cutting tip comprises means for fine machining of bores.
Claim 15
Dependent Claim
20 words
The cutting tip as claimed in claim 5, wherein the cutting tip comprises the cutting edge of a single-blade reamer.
Claim 16
Dependent Claim
23 words
The cutting tip as claimed in claim 5, wherein the hard material coating on the tool face is thinner than on the flank.
Claim 17
Dependent Claim
21 words
The cutting tip as claimed in claim 5, wherein the hard material coating on the flank is thinner than 4 μm.
Claim 18
Dependent Claim
18 words
The cutting tip as claimed in claim 15, wherein the hard material coating is thinner than 3 μm.
Claim 19
Dependent Claim
19 words
The cutting tip as claimed in claim 16, wherein the hard material coating is between 2.5 and 1.5 μm.
Claim 20
Dependent Claim
22 words
The cutting tip as claimed in claim 5, wherein the hard material coating on the tool face is thinner than 4 μm.
Claim 21
Dependent Claim
18 words
The cutting tip as claimed in claim 18, wherein the hard material coating is thinner than 3 μm.
Claim 22
Dependent Claim
19 words
The cutting tip as claimed in claim 19, wherein the hard material coating is between 1.5 and 2.5 μm.
Claim 23
Dependent Claim
34 words
The cutting tip as claimed in claim 5, wherein the surface of the hard material coating at the transition of the flank and the tool face is roughly in the configuration of a bevel.
Claim 24
Dependent Claim
25 words
The cutting tip as claimed in claim 21, wherein the bevel is roughly perpendicular to an angle bisector of the flank and the tool face.
Claim 25
Dependent Claim
17 words
The device according to claim 13, wherein the single blade is reversible and includes two cutting edges.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-10 | 1999-01-09 | 1999-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-10 | 2003-01-09 | 2003-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-10 | 2007-01-09 | 2007-07-11 | $7700.00 | Window Closed / Lapsed |