Patent US3643485A successfully refreshed from Google Patents.
US3643485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure rolling of workpieces
Assignee: ROTARY PROFILE ANSTALT
•
Filing: 1969-12-15
•
Granted: 1972-02-22
•
Expires: 1989-12-15
Abstract
Abstract A die for drawing tubular workpieces has its orifice defined by a ring of small rollers which are rotatable to work the workpieces around their circumference. Means may be present to straighten the tube and the die may include means to make the wall thickness of the workpiece uniform.
Inventors
- 👤 Jacob Marcovitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:48
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/76; B21K1/761; B21B; B21B1/00; B21B1/16; B21B19/00; B21B19/12; B21B23/00; B21C; B21C1/00; B21C1/16; B21C1/22; B21C1/24; B21C1/26; B21C3/00; B21C3/02; B21C3/08; B21H; B21H1/00; B21H1/06; B21H1/18; B21H8/00; B23; B23D; B23D25/00; B23D25/02; B23D25/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49991
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
103 words
Apparatus for rolling a tubular workpiece comprising structure defining an annular throat and within the throat an annular series of nonspherical rollers, each of which has its center portion of grEater diameter than the diameter of its axially outer portions, said throat comprising at least one backing member having a surface which is a surface of revolution on which surface at least said outer portions of the rollers roll in line contact, whereby in use a tubular workpiece passing through the throat with relative rotation between the workpiece and the rollers about the axis of the workpiece undergoes deformation of a surface thereof.
Claim 2
Dependent Claim
103 words
Apparatus for rolling a tubular workpiece comprising structure defining an annular throat and within the throat an annular series of nonspherical rollers, each of which has its center portion of grEater diameter than the diameter of its axially outer portions, said throat comprising at least one backing member having a surface which is a surface of revolution on which surface at least said outer portions of the rollers roll in line contact, whereby in use a tubular workpiece passing through the throat with relative rotation between the workpiece and the rollers about the axis of the workpiece undergoes deformation of a surface thereof.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1 further comprising means for causing relative rotation between the rollers and a workpiece.
Claim 4
Dependent Claim
15 words
The apparatus of claim 1 further comprising means for advancing the workpiece through the throat.
Claim 5
Dependent Claim
22 words
The apparatus of claim 1 wherein the rollers are arranged so as in use to act on the outside of the workpiece.
Claim 6
Dependent Claim
21 words
Apparatus as claimed in claim 4, and a mandrel located within the throat to support the inside surface of the workpiece.
Claim 7
Dependent Claim
15 words
Apparatus as claimed in claim 5, in which the surface of said mandrel is contoured.
Claim 8
Dependent Claim
22 words
The apparatus of claim 1 wherein the rollers are arranged so as in use to act on the inside of the workpiece.
Claim 9
Dependent Claim
13 words
Apparatus as claimed in claim 7, in which the throat-defining structure is contoured.
Claim 10
Dependent Claim
21 words
The apparatus of claim 1 wherein the rollers are arranged with their axes substantially parallel with the axis of the throat.
Claim 11
Dependent Claim
22 words
The apparatus of claim 1 in which the rollers are arranged with their axes oblique relative to the axis of the throat.
Claim 12
Dependent Claim
21 words
The apparatus of claim 1 including a number of annular series of rollers spaced apart along the length of the throat.
Claim 13
Dependent Claim
26 words
The apparatus of claim 11 in which the diameters of the circles encompassed respectively by the series of rollers decrease along the length of the throat.
Claim 14
Dependent Claim
21 words
The apparatus of claim 1 in which the backing member is formed with an annular groove for said series of rollers.
Claim 15
Dependent Claim
27 words
The apparatus of claim 13 in which the backing member is bored to provide the throat and said groove is provided within the wall of the bore.
Claim 16
Dependent Claim
18 words
The apparatus of claim 7 in which the backing member is a stem adapted to enter the workpiece.
Claim 17
Dependent Claim
20 words
The apparatus of claim 15 in which the structure is a housing with a cylindrical aperture which encloses the workpiece.
Claim 18
Dependent Claim
21 words
The apparatus of claim 15 in which the structure is a series of rollers parallel with and mounted around the workpiece.
Claim 19
Dependent Claim
31 words
The apparatus of claim 14 in which the backing member is bored to the outer diameter to which the workpiece is to be brought and is counterbored to receive the rollers.
Claim 20
Dependent Claim
144 words
Apparatus for treating a hollow workpiece, comprising first and second means defining between them an annular aperture and an annular series of rollers in the aperture, said first means including at least one backing member having a surface which is a surface of revolution on which surface at least the axially outer portions of the rollers are supported in line contact, the workpiece and said first means being axially and rotatively movable relative to each other to cause the rollers to traverse a periphery of the workpiece, said rollers being freely supported on said backing member for orbital movement about said backing member whereby upon rotative movement of said first means and workpiece relative to each other, the line of contact between each roller and the backing member rotates about the periphery of the backing member and a surface of the workpiece undergoes deformation.
Claim 21
Dependent Claim
144 words
Apparatus for treating a hollow workpiece, comprising first and second means defining between them an annular aperture and an annular series of rollers in the aperture, said first means including at least one backing member having a surface which is a surface of revolution on which surface at least the axially outer portions of the rollers are supported in line contact, the workpiece and said first means being axially and rotatively movable relative to each other to cause the rollers to traverse a periphery of the workpiece, said rollers being freely supported on said backing member for orbital movement about said backing member whereby upon rotative movement of said first means and workpiece relative to each other, the line of contact between each roller and the backing member rotates about the periphery of the backing member and a surface of the workpiece undergoes deformation.
Claim 22
Dependent Claim
70 words
Apparatus as claimed in claim 19, said rollers being elongated in their axial direction and having a center portion which contacts the workpiece and is of greater diameter than the endwise outer portions of the rollers which do not contact the workpiece, the total length of said line of contact between said backing member and the rollers being greater than the length of said center portion which contacts the workpiece.
Claim 23
Dependent Claim
50 words
Apparatus as claimed in claim 19, in which said backing member comprises a mandrel that extends into the workpiece to cause the rollers to act on the inner surface of the workpiece, said second means comprising an elongated circumferentially continuous wall that acts on the outer surface of the workpiece.
Claim 24
Dependent Claim
43 words
Apparatus as claimed in claim 21, in which the mandrel is of a diameter equal to that required of the workpiece, the mandrel having a sliding fit in an elongated bore coaxial with the circumferentially continuous wall and formed in a rigid housing.
Claim 25
Dependent Claim
58 words
Apparatus as claimed in claim 20, in which each of the rollers has stub axles on opposite axial ends of said center portion, the stub axles of each roller having a combined axial length greater than that of said center portion, at least the stub axles of the rollers being supported in line contact on said backing member.
Claim 26
Independent Claim
174 words
A method of rolling a workpiece having at least one surface which is a surface of revolution, the method comprising: a. rolling the said surface at high pressure by the median portion of each of a plurality of rollers, each roller being arranged with a major component of the direction of its axis parallel to the axis of the said surface of the workpiece, b. supporting and rolling the portions of each of the said rollers on either axial side of the said median portion in rolling line contact with massive backup means, the axial length of said line contact being greater than the axial length of contact between the workpiece and the said median portions, c. causing relative movement between the workpiece and the rollers about the axis of the said surface of the workpiece, and d. causing relative movement between the said workpiece and rollers in the direction of the said axis of the said surface of the workpiece, the arrangement being such that rolling causes considerable metal flow in the workpiece.
Claim 27
Independent Claim
174 words
A method of rolling a workpiece having at least one surface which is a surface of revolution, the method comprising: a. rolling the said surface at high pressure by the median portion of each of a plurality of rollers, each roller being arranged with a major component of the direction of its axis parallel to the axis of the said surface of the workpiece, b. supporting and rolling the portions of each of the said rollers on either axial side of the said median portion in rolling line contact with massive backup means, the axial length of said line contact being greater than the axial length of contact between the workpiece and the said median portions, c. causing relative movement between the workpiece and the rollers about the axis of the said surface of the workpiece, and d. causing relative movement between the said workpiece and rollers in the direction of the said axis of the said surface of the workpiece, the arrangement being such that rolling causes considerable metal flow in the workpiece.
Claim 28
Dependent Claim
35 words
A method as claimed in claim 24 in which there is no substantial deviation from true rolling between the backup means and the said portions on either side of the median portion of each roller.
Claim 29
Dependent Claim
93 words
Apparatus for rolling a workpiece having at least one surface which is a surface of revolution, the apparatus comprising: a. structure defining a throat and being comprised at least partially by a series of rollers, each said roller having a median portion to engage the workpiece and additional portions on either axial side of said median portion, and b. massive backup means on which the said additional portions are supported and roll in line contact, the axial length of the said line contact being greater than the axial length of said median portion.
Claim 30
Dependent Claim
93 words
Apparatus for rolling a workpiece having at least one surface which is a surface of revolution, the apparatus comprising: a. structure defining a throat and being comprised at least partially by a series of rollers, each said roller having a median portion to engage the workpiece and additional portions on either axial side of said median portion, and b. massive backup means on which the said additional portions are supported and roll in line contact, the axial length of the said line contact being greater than the axial length of said median portion.
Claim 31
Dependent Claim
26 words
Apparatus as claimed in claim 26 in which the diameter of the said median portion is greater than the maximum diameter of the said additional portions.
References Cited (Backward Citations)
US447582A
Cited
US1184972A
Cited
US1072001A
Cited
US1530381A
Cited
US1596751A
Cited
US1665915A
Cited
US1774231A
Cited
US1970061A
Cited
US2383214A
Cited
US2375108A
Cited
US2522257A
Cited
US2807971A
Cited
US2546756A
Cited
US3160036A
Cited
US3387477A
Cited
US3473358A
Cited
US3449812A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |