US4752367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for electrochemically smoothing or finishing a surface of a conductive metal part
Assignee: Robert Bosch LLC
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Filing: 1987-05-08
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Granted: 1988-06-21
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Expires: 2007-05-08
Abstract
Abstract An apparatus and method are disclosed for electrochemically finishing or smoothing an irregular anode surface of a conductive metal part while removing a minimum of metal from the anode surface. The smoothing or finishing of irregular surfaces, such as burred surfaces, for example, is achieved by mounting the face of a cathode member adjacent the anode surface to be finished to define a minimum gap therebetween and moving the face relative to the anode surface while subjecting the face and anode surface to a flow of electrolyte fluid through the gap. An electrical power means is coupled to the face and anode surface for generating a current therebetween through the electrolyte for electrochemically finishing the burred anode surface with a minimum removal of metal therefrom.
Inventors
- 👤 Alexander Vishnitsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:13
CPC Classifications
C; C25; C25D; C25D17/00; C25D17/10; B; B23; B23H; B23H9/00; B23H9/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
119 words
An apparatus for electrochemically removing projections from the junction of a surface and a cylindrical bore of a stationary anode, comprising: a cathode member mounted between at least 0.001 and 0.010 inches (0.025 and 0.25 mm) from the projection and having a surface adjacent the projection; means subjecting the space between the surface of the cathode and the anode to an electrolyte fluid; electrical power means coupled to the anode and cathode members for generating a current between the anode and the cathode through the electrolyte fluid for chamically removing the projection while removing a minimum of material from the adjacent surface; and means for continuously moving the cathode surface relative to the anode while said current is flowing.
Claim 2
Independent Claim
119 words
An apparatus for electrochemically removing projections from the junction of a surface and a cylindrical bore of a stationary anode, comprising: a cathode member mounted between at least 0.001 and 0.010 inches (0.025 and 0.25 mm) from the projection and having a surface adjacent the projection; means subjecting the space between the surface of the cathode and the anode to an electrolyte fluid; electrical power means coupled to the anode and cathode members for generating a current between the anode and the cathode through the electrolyte fluid for chamically removing the projection while removing a minimum of material from the adjacent surface; and means for continuously moving the cathode surface relative to the anode while said current is flowing.
Claim 3
Dependent Claim
28 words
An apparatus for electrochemical finishing of a surface according to claim 1 wherein the cathode member is cylindrical and rotatably movable about an axis coadial with the bore.
Claim 4
Dependent Claim
30 words
An apparatus for electrochemical finishing of a surface according to claim 2 wherein the face of the cathode member has at least one groove for pumping electrolyte through the gap.
Claim 5
Dependent Claim
34 words
An apparatus for electrochemical finishing of a surface according to claim 1 comprising means for moving the surface of the cathode member relative to the projection at about 15 feet or more per second.
Claim 6
Independent Claim
139 words
A method for electrochemically removing a burr from the junction of a cylindrical bore and a surface of an electrically conductive stationary anode member mounted adjacent a cylindrical cathode member, the cathode member having a surface facing the burr, comprising the steps of: spacing the outer surface of the cathode member no more than about 0.001 to 0.010 inches (0.025 to 0.25 mm) from the end of said burr; generating an electrical current between the cathode and the anode through the electrolyte fluid for electrochemically finishing the surface while removing a minimum of metal therefrom; continuously rotating the cathode member about a fixed axis coaxial with the bore at the speed of at least 15 feet per second relative to the burr during finishing; and subjecting the space between the anode and cathode to an electrolyte fluid during movement.
Claim 7
Independent Claim
139 words
A method for electrochemically removing a burr from the junction of a cylindrical bore and a surface of an electrically conductive stationary anode member mounted adjacent a cylindrical cathode member, the cathode member having a surface facing the burr, comprising the steps of: spacing the outer surface of the cathode member no more than about 0.001 to 0.010 inches (0.025 to 0.25 mm) from the end of said burr; generating an electrical current between the cathode and the anode through the electrolyte fluid for electrochemically finishing the surface while removing a minimum of metal therefrom; continuously rotating the cathode member about a fixed axis coaxial with the bore at the speed of at least 15 feet per second relative to the burr during finishing; and subjecting the space between the anode and cathode to an electrolyte fluid during movement.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |