GB818854A - Improvements relating to methods of work hardening steel rods and wires - Google Patents

Improvements relating to methods of work hardening steel rods and wires

Info

Publication number
GB818854A
GB818854A GB26857/57A GB2685757A GB818854A GB 818854 A GB818854 A GB 818854A GB 26857/57 A GB26857/57 A GB 26857/57A GB 2685757 A GB2685757 A GB 2685757A GB 818854 A GB818854 A GB 818854A
Authority
GB
United Kingdom
Prior art keywords
rod
wire
bending
rollers
roller
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
GB26857/57A
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 GB818854A publication Critical patent/GB818854A/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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B21D3/05—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers arranged on axes rectangular to the path of the work
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
    • C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Wire Processing (AREA)

Abstract

818,854. Making reinforcing rods; altering physical structure; straightening. HUFNAGL, W. Aug. 26, 1957 [Aug. 27, 1956], No. 26857/57. Classes 83 (2) and 83 (4). [Also in Group X] A method of work-hardening a steel rod or wire to increase its tensile strength comprises continuously bending beyond its yield point and along its whole length a rod or wire made of steel capable of ageing, strengthening the rod or wire and then storing the rod or wire to allow ageing to take place. In an embodiment the steel rod or wire is drawn over a roller 2 by drawing rollers 3 which can be profiled to impart ridges or recesses to smooth-surfaced rods by cold forming. The radius of bending is less than six times the diameter of the rod or wire and preferably four times this diameter. In another embodiment the rod is passed between three rollers 4, 5 and 6 on to a winch drum 8 the middle roller 5 being movable relatively to the rollers 4 and 6 as shown in Fig. 2. One or more of the rollers can be profiled to provide projections or recesses on the rod. If the rod or wire is already profiled the bending roller is provided with a complementary profile as shown in Fig. 3. If the rod is provided with transverse and longitudinal ridges 14 and 15 respectively the height of the longitudinal ridges is such that they alone contact the bending roller (Fig. 4). The rod may be of circular cross-section with transverse ridges 18 projecting only on two opposite sides so that only the smooth parts of the surface engage the bending roller. The method can be combined with other cold-working operations, e.g. drawing, whereby part of the total increase of tensile strength is obtained by the drawing and the remainder by bending and strengthening.
GB26857/57A 1956-08-27 1957-08-26 Improvements relating to methods of work hardening steel rods and wires Expired GB818854A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE818854X 1956-08-27

Publications (1)

Publication Number Publication Date
GB818854A true GB818854A (en) 1959-08-26

Family

ID=6735548

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26857/57A Expired GB818854A (en) 1956-08-27 1957-08-26 Improvements relating to methods of work hardening steel rods and wires

Country Status (1)

Country Link
GB (1) GB818854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137548A (en) * 1983-04-05 1984-10-10 Inst Francais Du Petrole Increasing the resistance to corrosion cracking

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2137548A (en) * 1983-04-05 1984-10-10 Inst Francais Du Petrole Increasing the resistance to corrosion cracking

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