Patent US3754448A successfully refreshed from Google Patents.
US3754448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sonic energy metal working process
Assignee: The Ohio State University
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Filing: 1971-06-08
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Granted: 1973-08-28
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Expires: 1991-06-08
Abstract
Abstract Utilization of a resonant electromechanical transducer for delivering high power (energy to a nonresonant load surface, excited from a fixed frequency power supply. The application of the tool to the work surface is accomplished by a flat surface tool coupled perpendicular to the horn axis and parallel to the end surface of the transducer tip. The sonic energy is delivered to the workpiece by coupling only a small fraction of the total tool surface to the work surface. The velocity of the cutting surface of the tool relative to the workpiece is a function of the excitation level of the transducer; the velocity being independent of the average velocity by which the transducer is moved across the work surface. The rate of removal of material in a metal cutting, chip forming, or shaving operation is a function of the excitation and the depth of cut independent of the transducer-transfer-velocity; whereas, outside of certain limits the transducer-transfer-velocity is utilized to reduce the cutting rate of the tool.
Inventors
- 👤 Daniel R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:36
CPC Classifications
B; B23; B23D; B23D79/00; Y; Y10; Y10S; Y10S82/00; Y10S82/904; Y10T; Y10T409/00; Y10T409/50; Y10T409/50082; Y10T409/504756; Y10T409/506232; Y10T409/506396
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
153 words
A resonant horn structure electromechanical transducer comprising a loading mass having a first elongated structure of relatively fixed diameter, a force concentrator consisting of a second elongated structure of a lesser diameter, a piezoelectric driving means, and a clamping means; said driving means being positioned between one end face of each of said first and second elongated structures and defining a location of lower velocity, said clamping means consisting of a ring element engaging the said end faces; and the other end of said force concentrator elongated structure remote from said driving means defining a location of maximum velocity, said last named end having a flat surface in a plane perpendicular to the longitudinal axis of said force concentrator elongated structure; a tool having a flat surface, and means for fixedly positioning said flat surface of said tool parallel with the flat surface of said other end of said force concentrator elongated structure.
Claim 2
Dependent Claim
153 words
A resonant horn structure electromechanical transducer comprising a loading mass having a first elongated structure of relatively fixed diameter, a force concentrator consisting of a second elongated structure of a lesser diameter, a piezoelectric driving means, and a clamping means; said driving means being positioned between one end face of each of said first and second elongated structures and defining a location of lower velocity, said clamping means consisting of a ring element engaging the said end faces; and the other end of said force concentrator elongated structure remote from said driving means defining a location of maximum velocity, said last named end having a flat surface in a plane perpendicular to the longitudinal axis of said force concentrator elongated structure; a tool having a flat surface, and means for fixedly positioning said flat surface of said tool parallel with the flat surface of said other end of said force concentrator elongated structure.
Claim 3
Dependent Claim
17 words
The transducer of claim 1 further comprising means for pulling said tool face across said work surface.
Claim 4
Dependent Claim
21 words
The transducer of claim 2 wherein said last-named means further includes means for applying a static force to said work surface.
Claim 5
Independent Claim
115 words
The method of sonically removing metal from a flat work surface with a tool sonically vibrated by a resonant horn structure electromechanical transducer comprising: defining a location of maximum velocity, providing a flat surface at said location, positioning said flat surface in a plane perpendicular to the axis of said structure, providing said tool with a flat surface, positioning said flat surface of said tool parallel with said flat surface at said location of maximum velocity, contacting only a small fraction of said tool with a work surface and varying the angle between the flat tool surface and said work surface to thereby vary the depth of cut of said tool into said work surface.
Claim 6
Independent Claim
115 words
The method of sonically removing metal from a flat work surface with a tool sonically vibrated by a resonant horn structure electromechanical transducer comprising: defining a location of maximum velocity, providing a flat surface at said location, positioning said flat surface in a plane perpendicular to the axis of said structure, providing said tool with a flat surface, positioning said flat surface of said tool parallel with said flat surface at said location of maximum velocity, contacting only a small fraction of said tool with a work surface and varying the angle between the flat tool surface and said work surface to thereby vary the depth of cut of said tool into said work surface.
Claim 7
Dependent Claim
17 words
The method of claim 4 further providing the step of pulling said tool across said work surface.
Claim 8
Dependent Claim
15 words
The method of claim 4 further providing applying a static force to said work surface.
Claim 9
Dependent Claim
21 words
The method of claim 6 wherein said step of applying static force includes applying said static force through a spring system.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |