US1982362A - Method of producing flattened metal tubes - Google Patents

Method of producing flattened metal tubes Download PDF

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Publication number
US1982362A
US1982362A US704694A US70469433A US1982362A US 1982362 A US1982362 A US 1982362A US 704694 A US704694 A US 704694A US 70469433 A US70469433 A US 70469433A US 1982362 A US1982362 A US 1982362A
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United States
Prior art keywords
tube
rods
flattened
producing
metal tubes
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Expired - Lifetime
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US704694A
Inventor
Louis E Trembley
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General Electric Co
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General Electric Co
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Publication date
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Priority to US704694A priority Critical patent/US1982362A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non circular section

Definitions

  • My invention relates to methods of producing flattened metal tubes. This type of tube is used extensively in heat radiators for transformers and for various other purposes. It is usually most economical and convenient to produce a flattened tube by first producing a round or cylindrical tube and then flattening the round tube to give it the desired width and thickness.
  • the general object of the invention is to provide an improved method of flattening a tube which is initially round or which is at least thicker and narrower than desired.
  • a plurality of cylindrical steel rods 11 are placed longitudinally and side by side in the tube and the tube is then flattened by the press until the sides of the tubeare pressed tightly against the rods as indicated in Fig. 2.
  • the rods 11 are all preferably alike and of equal diameter, the diameter of each rod 11 being equal to the shorter transverse inside dimension of the tube after it is flattened and the sum of the diameters of all the tubes being equal to the longer transverse inside dimension of the tube after it is flattened.
  • the rods 11 should bev so selected that the inner circumference of the tube will equal twice the sum of the diameters of n-l rods plus the circumference of one rod where n is the number of rods.
  • the invention provides a process which may be con-.- veniently used to produce many different sizes of flattened tubes depending upon the initial size of the tube and the number and sizeof the rods which determine the extent to which it is flattened.
  • said process including the steps of placing 'n rods in a tube having an inner circumference substantially equal to twice the sum of the diameters of n-1 rods plus the circumference of one rod, and flattening the tube with the rods therein.

Description

V- 7, 1934- EITREMBLEY 1,932,362
METHOD OF PRODUCING FLATTENED METAL TUBE S Filed Dec. 30, 1933 Inventor": Louis E. Trembleg,
4 ADM 9 Hi5 Attorney.
Patented Nov. 27, 1934 METHOD OF PRODUCING FLATTENED METAL TUBES Louis E. Trembley, Pittsfield,,Mass., assignor to General Electric Com New York pany, a corporation of Application December 30, 1933, Serial No. 704,694
4 Claims. ((1153-10) My invention relates to methods of producing flattened metal tubes. This type of tube is used extensively in heat radiators for transformers and for various other purposes. It is usually most economical and convenient to produce a flattened tube by first producing a round or cylindrical tube and then flattening the round tube to give it the desired width and thickness. The general object of the invention is to provide an improved method of flattening a tube which is initially round or which is at least thicker and narrower than desired. Y
The invention will be explained in the following description taken in connection with the,
tube. Before the tube 10 is flattened, a plurality of cylindrical steel rods 11 are placed longitudinally and side by side in the tube and the tube is then flattened by the press until the sides of the tubeare pressed tightly against the rods as indicated in Fig. 2. The rods 11 are all preferably alike and of equal diameter, the diameter of each rod 11 being equal to the shorter transverse inside dimension of the tube after it is flattened and the sum of the diameters of all the tubes being equal to the longer transverse inside dimension of the tube after it is flattened. The rods 11 should bev so selected that the inner circumference of the tube will equal twice the sum of the diameters of n-l rods plus the circumference of one rod where n is the number of rods. Then the rods will flt tightly in the flattened tube and the pressure of the outer two rods will force each longitudinal edge of the tube to assume a smooth semitened tube will be a wholemultiple of its shorter transverse inside dimension. However, the invention provides a process which may be con-.- veniently used to produce many different sizes of flattened tubes depending upon the initial size of the tube and the number and sizeof the rods which determine the extent to which it is flattened.
The invention has been explained by describing and illustrating the steps of flattening a particular tube in accordance therewith but it will be apparent that changes may be made without departing from the spirit of the invention and the scope of the appended claims.
What I claim as new and desire to secure by Letters Patent of the United States, is,--
1. The process of producing a flattened tube, said process including the steps of placing a plurality of rods side by side in a tube, and flattening the tube with the rods therein.
2. The process of producing a flattened tube, said process including the steps of placing a plurality of rods side by side in a cylindrical tube, and flattening the tube with the rods therein.
3. The process of producing a flattenedtube,
said process including the steps of placing 'n rods in a tube having an inner circumference substantially equal to twice the sum of the diameters of n-1 rods plus the circumference of one rod, and flattening the tube with the rods therein.
, 4. The process of producing a flattened tube, said process including the steps of placing a plurality of cylindrical rods of equal diameter in a tube, and flattening the tube with the rods therein.
LOUISE. TREMBLEY.
US704694A 1933-12-30 1933-12-30 Method of producing flattened metal tubes Expired - Lifetime US1982362A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431851A (en) * 1943-09-11 1947-12-02 Boeing Aircraft Co Mandrel and method for flattening metal tubes
US2442850A (en) * 1943-12-20 1948-06-08 Revere Copper & Brass Inc Method of and apparatus for making flat metal tubes
US2697867A (en) * 1954-12-28 Electric cable
US3403543A (en) * 1966-03-29 1968-10-01 Navy Usa Apparatus for forming flattened tubes with constant radii edge sections
US4088001A (en) * 1976-09-13 1978-05-09 Hosei Buleki Kogyo Kabushiki Kaisha Method of manufacturing a strut member made of a tube material for use with drum brakes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2697867A (en) * 1954-12-28 Electric cable
US2431851A (en) * 1943-09-11 1947-12-02 Boeing Aircraft Co Mandrel and method for flattening metal tubes
US2442850A (en) * 1943-12-20 1948-06-08 Revere Copper & Brass Inc Method of and apparatus for making flat metal tubes
US3403543A (en) * 1966-03-29 1968-10-01 Navy Usa Apparatus for forming flattened tubes with constant radii edge sections
US4088001A (en) * 1976-09-13 1978-05-09 Hosei Buleki Kogyo Kabushiki Kaisha Method of manufacturing a strut member made of a tube material for use with drum brakes

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