Patent US4483755A successfully refreshed from Google Patents.
US4483755A
Expired / Lapsed
US
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Method for the treatment of surfaces of a workpiece of carbon-containing cast iron
Assignee: Individual
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Filing: 1982-05-17
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Granted: 1984-11-20
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Expires: 2002-05-17
Abstract
Abstract The invention relates to a method and an apparatus for the treatment of surfaces of a workpiece of carbon-containing cast iron, and in particular of blind holes in gray iron cast workpieces, by electrochemical stock removal and mechanical reaming-and-plating. Electrochemical stock removal and mechanical reaming and plating are carried out in separate steps whose operating parameters are independently adjustable, the mechanical stock removal being essentially confined to a reaming-and-plating of the surface which does not entail a closing of graphite flakes. A cylinder bore produced by the method of the invention with desired roughness will have a dark, lustrous surface.
Inventors
- 👤 Klaus Heck
- 👤 Karl Linzenkirchner
- 👤 Fritz Indra
- 👤 Horst Lindner
- 👤 Hans Munnighoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:15
CPC Classifications
B; B23; B23H; B23H5/00; C; C25; C25F; C25F3/00; C25F3/02; C25F3/06; C25F7/00; F; F16; F16J; F16J1/00; F16J1/08; F05; F05C; F05C2203/00; F05C2203/08; F05C2203/0865; F05C2203/0882; Y; Y10; Y10S; Y10S408/00; Y10S408/709; Y10T; Y10T408/00; Y10T408/36; Y10T408/375; Y10T408/378; Y10T408/3792
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
71 words
A method for the treatment of surfaces of a workpiece of carbon-containing cast iron in cast-iron workpieces comprising: removing electrochemically stock from the surface of a workpiece; mechanically treating said surface; said electrochemical stock removing step and mechanical treating step being carried out in at least two separate steps whose operating parameters are independently adjustable; and said mechanical treating step including reaming-and-plating of said surface substantially without closing of graphite flakes.
Claim 2
Independent Claim
71 words
A method for the treatment of surfaces of a workpiece of carbon-containing cast iron in cast-iron workpieces comprising: removing electrochemically stock from the surface of a workpiece; mechanically treating said surface; said electrochemical stock removing step and mechanical treating step being carried out in at least two separate steps whose operating parameters are independently adjustable; and said mechanical treating step including reaming-and-plating of said surface substantially without closing of graphite flakes.
Claim 3
Dependent Claim
28 words
A method according to claim 1, wherein in at least the electrochemical stock removing step the charge ranges from about 5 to about 15 ampere-seconds per square centimeter.
Claim 4
Dependent Claim
25 words
A method according to claim 1 wherein said mechanical treating step includes overlapping the workpiece and a reaming-and-plating tool from about 1 to about 5μ.
Claim 5
Dependent Claim
42 words
A method according to claim 1 wherein in the mechanical treating step a contact pressure which ranges from 10 4 to 5×10 5 N/m 2 and which preferably is 10 5 N/m 2 is used between the workpiece and a reaming-and-plating tool.
Claim 6
Dependent Claim
27 words
A method according to claim 1 wherein the electrochemical stock removing step and reaming-and-plating step are performed while the workpiece surface is being wetted with different liquids.
Claim 7
Dependent Claim
31 words
A method according to claim 1, 2, 3, 4 or 5 wherein between an electrochemically treating step and a mechanical treating step at least part of the workpiece surface is hardened.
Claim 8
Independent Claim
73 words
A method for the treatment of surfaces of a workpiece of carbon-containing cast iron in cast-iron workpieces comprising: removing electrochemically stock from the surface of a workpiece; mechanically treating said surface; said electrochemical stock removing step and mechanical treating step being carried out in at least two separate steps whose operating parameters are independently adjustable; and said mechanical treating step including reaming-and-plating substantially simultaneously of said surface substantially without closing of graphite flakes.
Claim 9
Independent Claim
73 words
A method for the treatment of surfaces of a workpiece of carbon-containing cast iron in cast-iron workpieces comprising: removing electrochemically stock from the surface of a workpiece; mechanically treating said surface; said electrochemical stock removing step and mechanical treating step being carried out in at least two separate steps whose operating parameters are independently adjustable; and said mechanical treating step including reaming-and-plating substantially simultaneously of said surface substantially without closing of graphite flakes.
Claim 10
Dependent Claim
35 words
The method according to claim 7 wherein said mechanical treating step of reaming-and-plating simultaneously is accomplished without electrolysis and without stock removal whereby the material removed is plated on the surface by a mechanical tool.
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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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |