US3848447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rolling method and a rolling mill for carrying out the method
Assignee: METALFORM AB
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Filing: 1972-11-06
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Granted: 1974-11-19
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Expires: 1992-11-06
Abstract
Abstract A rolling method for producing a semi-finished metal section from a larger metal section of substantially rectangular crosssection and with which the width of two opposing, first sides exceeds the width of the remaining two, second sides. The metal section is reduced by reversable rolling without being turned around its long axis in several passes between two working rolls which are capable of being progressively urged towards said second sides of the metal section. The metal section is guided during the reduction process into and out of the roll nip and the original distance between said first sides of the metal section is maintained constant during the entire rolling sequence by means of two pairs of guide rolls arranged on either side of the working rolls, the guide rolls having smooth barrel surfaces and presenting a nip of constant width therebetween and having a diameter which is considerably smaller than that of the working roll.
Inventors
- 👤 P Strandell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:28
CPC Classifications
B; B21; B21B; B21B13/00; B21B13/08; B21B13/12; B21B1/00; B21B1/02; B21B1/06; B21B15/00; B21B2015/0064; B21B35/00; B21B2035/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
181 words
A method for producing a semi-finished metal section from an elongated piece of stock of rectangular cross section having two opposing first sides of greater width than the remaining two second sides, said method comprising: a. passing the stock between two working rolls contacting the second sides, said working rolls having a diameter of at least 0.8 times the width of said first sides and being mounted for adjustable movement toward each other, and two pairs of guide rolls positioned on either side of the working rolls and contacting the first sides, said guide rolls having a smaller diameter than the working rolls and presenting a nip of constant width therebetween; b. reversing the direction of movement of the stock and again passing it between the rolls without turning the stock around its longitudinal axis; c. guiding the stock into and out of the roll nip during successive passes; d. adjusting the working rolls during successive passes to bear against the second sides and to reduce the width of the first sides while maintaining a constant width between the guide rolls.
Claim 2
Independent Claim
181 words
A method for producing a semi-finished metal section from an elongated piece of stock of rectangular cross section having two opposing first sides of greater width than the remaining two second sides, said method comprising: a. passing the stock between two working rolls contacting the second sides, said working rolls having a diameter of at least 0.8 times the width of said first sides and being mounted for adjustable movement toward each other, and two pairs of guide rolls positioned on either side of the working rolls and contacting the first sides, said guide rolls having a smaller diameter than the working rolls and presenting a nip of constant width therebetween; b. reversing the direction of movement of the stock and again passing it between the rolls without turning the stock around its longitudinal axis; c. guiding the stock into and out of the roll nip during successive passes; d. adjusting the working rolls during successive passes to bear against the second sides and to reduce the width of the first sides while maintaining a constant width between the guide rolls.
Claim 3
Dependent Claim
28 words
The method of claim 1 including the step of using a metal stock having a width relationship between said first and said second sides of 2:1 to 5:1.
Claim 4
Dependent Claim
46 words
The method of claim 1 including the step of reducing the metal stock by means of said working rolls to a width relationship between said first and said second sides of 1:5 to 1:1, whereby the metal stock is extended to 2-25 times its original length.
Claim 5
Dependent Claim
16 words
The rolling method of claim 1 including the use of working rolls having smooth barrel surfaces.
Claim 6
Dependent Claim
53 words
The method of claim 1 including the use of working rolls having shallow grooves, the width of which corresponds to the width of said second sides of the metal stock to be reduced and a depth which at most is one third of the width of said second sides of the metal stock.
Claim 7
Dependent Claim
25 words
The method of claim 1 including the step of using guide rolls having a diameter of from 0.25-0.50 times the diameter of the working rolls.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |