US3760488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for surface finishing of metals
Assignee: Lasalle Steel Co
•
Filing: 1972-03-23
•
Granted: 1973-09-25
•
Expires: 1992-03-23
Abstract
Abstract A process for the surface finishing of metal in which a metal workpiece of repeating cross-section coated with a lubricant and heated at an elevated temperature is passed through a tandem assembly of a lead die, a cutting tool to remove surface metal, and a finish die to provide a finished workpiece having improved surface characteristics and improved mechanical and physical properties.
Inventors
- 👤 R Cucuz
- 👤 M Verduzco
- 👤 G Zavodny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:10
CPC Classifications
B; B21; B21C; B21C43/00; B21C43/02; B23; B23D; B23D79/00; B23D79/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812; Y10T29/49972; Y10T29/49975; Y10T29/49979; Y10T29/49995; Y10T409/00; Y10T409/50; Y10T409/501476; Y10T409/50164
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
12 words
A process as defined in claim 1 wherein the lubricant is graphite.
Claim 2
Dependent Claim
17 words
A process as defined in claim 1 wherein the lubricant is a suspension of graphite in water.
Claim 3
Dependent Claim
22 words
A process as defined in claim 1 wherein the workpiece is heated to a temperature above 250*F but below the critical temperature.
Claim 4
Dependent Claim
39 words
A process as defined in claim 1 wherein the workpiece is passed through the cutter at a rate sufficient to raise the temperature of the metal being removed to a temperature within the hot working region of the metal.
Claim 5
Dependent Claim
22 words
A process as defined in claim 1 wherein the workpiece is processed at a rate of 10 to 350 feet per minute.
Claim 6
Dependent Claim
27 words
A process as defined in claim 1 wherein the cutting tool has a rake angle of +20* to -20* and a clearance angle of +15* to -15*.
Claim 7
Dependent Claim
22 words
A process as defined in claim 1 wherein the first die is spaced from the cutting tool by 2 to 30 inches.
Claim 8
Dependent Claim
25 words
A process as defined in claim 1 wherein the second die is spaced from the cutting tool by a distance of 2 to 30 inches.
Claim 9
Dependent Claim
15 words
A process as defined in claim 1 wherein the workpiece is a strain hardenable steel.
Claim 10
Dependent Claim
81 words
In a process for the surface finishing of metal wherein a metal workpiece of repeating cross-section heated to a temperature of at least 250*F and coated with a lubricant is passed through a cutting tool to remove surface metal, the improvement comprising passing the workpiece through at least one of a lead die preceding the cutting tool and a finish die following the cutting tool to work the metal and support the workpiece as it is passed through the cutting tool.
Claim 11
Dependent Claim
12 words
A process as defined in claim 11, wherein the metal is steel.
Claim 12
Dependent Claim
12 words
A process as defined in claim 11, wherein the lubricant is graphite.
Claim 13
Dependent Claim
40 words
A process as defined in claim 11, wherein the workpiece is passed through the cutting tool at a rate sufficient to raise the temperature of the metal being removed to a temperature within the hot working region of the metal.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |