GB520333A - Method of and apparatus for marking round or nearly round metal bars of commercial quality cold worked by means of twisting - Google Patents

Method of and apparatus for marking round or nearly round metal bars of commercial quality cold worked by means of twisting

Info

Publication number
GB520333A
GB520333A GB27315/38A GB2731538A GB520333A GB 520333 A GB520333 A GB 520333A GB 27315/38 A GB27315/38 A GB 27315/38A GB 2731538 A GB2731538 A GB 2731538A GB 520333 A GB520333 A GB 520333A
Authority
GB
United Kingdom
Prior art keywords
torsion
round
rod
strength
pitch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB27315/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB520333A publication Critical patent/GB520333A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
    • B21B1/163—Rolling or cold-forming of concrete reinforcement bars or wire ; Rolls therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12333—Helical or with helical component

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wire Processing (AREA)
  • Metal Rolling (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

520,333. Marking bars. LUKACS, E.. and STERN, S. Sept. 19, 1938, No. 27315. Convention date, Oct. 9, 1937. [Class 20 (iv)] [Also in Group XXII] In raising the yield point and tensile strength of rods for reinforced concrete by cold working by applied torsion, the strength is indicated by the pitch of small intermittent depression or colour on a line parallel to the axis of the bar which has been distorted to helical form by the applied torsion. In the Figure, gripping jaws 5 apply a straight pull to draw a rod g through a pair of skew rolls 6, 7 provided with a surface to make grooves on the rod such groove &c. emerging as a helical pattern &c., the pitch of which is proportional to the torsion applied by the rolls. In a modification, the roll pair may be parallel, the torsion being applied by rotating the roll pair round the axis of the bar or by turning the gripping jaws round in addition to their pull. An automatic disconnector may cut off the applied torsion when the required strength is attained as indicated by the helical pitch on the rod. The torsion may be varied along different lengths of a rod to vary the strength longitudinally.
GB27315/38A 1937-10-09 1938-09-19 Method of and apparatus for marking round or nearly round metal bars of commercial quality cold worked by means of twisting Expired GB520333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU520333X 1937-10-09

Publications (1)

Publication Number Publication Date
GB520333A true GB520333A (en) 1940-04-22

Family

ID=10979470

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27315/38A Expired GB520333A (en) 1937-10-09 1938-09-19 Method of and apparatus for marking round or nearly round metal bars of commercial quality cold worked by means of twisting

Country Status (5)

Country Link
US (1) US2233869A (en)
BE (1) BE436992A (en)
CH (1) CH215348A (en)
FR (1) FR861494A (en)
GB (1) GB520333A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103264079A (en) * 2013-05-29 2013-08-28 江阴中南重工股份有限公司 Rotational shear machine of core-shaft-free spiral vanes

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594503A (en) * 1947-05-23 1952-04-29 United States Steel Corp Movable jaw chucking device
DE2848679A1 (en) * 1978-11-09 1980-05-22 Bayer Ag METHOD AND DEVICE FOR PRODUCING COILED STRIPS
JPS56102319A (en) * 1980-01-21 1981-08-15 Inoue Mtp Co Ltd Method and apparatus for bending long sized material
US4654912A (en) * 1984-09-18 1987-04-07 Gray John C Production of threaded metal rods for making U-bolts
US4897117A (en) * 1986-03-25 1990-01-30 Teledyne Industries, Inc. Hardened penetrators
EP2226091B1 (en) * 2007-12-26 2019-09-18 Terumo Kabushiki Kaisha Medical long element, method for manufacturing the same, and apparatus for manufacturing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103264079A (en) * 2013-05-29 2013-08-28 江阴中南重工股份有限公司 Rotational shear machine of core-shaft-free spiral vanes

Also Published As

Publication number Publication date
US2233869A (en) 1941-03-04
CH215348A (en) 1941-06-30
BE436992A (en)
FR861494A (en) 1941-02-10

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