EP0621368B1 - Twisted-wire product - Google Patents

Twisted-wire product Download PDF

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Publication number
EP0621368B1
EP0621368B1 EP94100757A EP94100757A EP0621368B1 EP 0621368 B1 EP0621368 B1 EP 0621368B1 EP 94100757 A EP94100757 A EP 94100757A EP 94100757 A EP94100757 A EP 94100757A EP 0621368 B1 EP0621368 B1 EP 0621368B1
Authority
EP
European Patent Office
Prior art keywords
wires
product
twisted
diameter
ratio
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 - Lifetime
Application number
EP94100757A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0621368A1 (en
Inventor
Baglai Gennady Valerianovich
Birjukov Boris Alexandrovich
Dashevsky Lev Iosifovich
Kupry Evgeny Ivanovich
Nenashev Alexandr Vladimirovich
Fetisov Vasily Pavlovich
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.)
BELARUSSIAN STEEL WORKS
Original Assignee
BELARUSSIAN STEEL WORKS
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 BELARUSSIAN STEEL WORKS filed Critical BELARUSSIAN STEEL WORKS
Publication of EP0621368A1 publication Critical patent/EP0621368A1/en
Application granted granted Critical
Publication of EP0621368B1 publication Critical patent/EP0621368B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0606—Reinforcing cords for rubber or plastic articles
    • D07B1/0613—Reinforcing cords for rubber or plastic articles the reinforcing cords being characterised by the rope configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2001—Wires or filaments
    • D07B2201/2006—Wires or filaments characterised by a value or range of the dimension given
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2015—Strands
    • D07B2201/202—Strands characterised by a value or range of the dimension given

Definitions

  • the present invention relates in general to production of metal cord for reinforcing of tyres and other mechanical rubber goods and more specifically to twisted-wire products.
  • the principal aim of twisted-wire products made use of for reinforcing of tyres and other mechanical rubber goods is to increase the strength of a rubber-cord component in the finished product, its high flexibility remaining unaffected. Provision of a required flexibility and hence service durability is attained due to a reduced diameter of the wire the product is twisted of, which results in a decreased moment of bending resistance of the product according to the following commonly known relation:
  • the adhesive power is a function of the perimeter of the outer surface of the cross-sectional area of the twisted-wire product, which is found from the following relation:
  • a generalized index I is used, equal to the ratio between the perimeter P of the outer surface of the metallic component, said perimeter determining the adhesive power of the product, and the moment W of resistance to bending, since fatigue strength and flexibility are inversely proportional to said ratio.
  • the value of the index I for such constructions is rather high.
  • such products are highly labor-consuming due to a great number of components they consist of, whereas a reduced number of such components in, e.g., 3+6 or +x5 constructions lead to a higher value of the moment W of bending resistance with a nearly the same value of P and hence to a reduced value of I.
  • the presence of a central element in such constructions, e.g., of the 3+6 type decreases the value of the index I to still higher degree.
  • a twisted-wire product comprising strands spirally wound together and laid of spirally wound wires, according to the invention, features a ratio between the diameter of the wires laid into strands and that of the product itself is within 0.135 and 0.206, and the ratio between the number of wires per strand and the number of strands per product is so selected that the minimum ratio between the perimeter of an exposed outer surface of the cross-sectional area equal to unity and a sum moment of bending resistance is 215.
  • each of the strands consisting of five wires that is, having the 3x5, 4x5, and 5x5 constructions provides for high value of the perimeter of the exposed outer surface, said value determining their adequate adhesive power.
  • this makes it possible to reduce the momend W of bending resistance in the proposed constructions and hence to increase the generalized index I characteristic of the adhesive power and fatigue strength of the proposed construction.
  • Table 1 contains comparative data of the proposed construction of a twisted-wire product and of the heretofore-known constructions as for the parameters P, W, and I.
  • An analysis into said data demonstrates that it is due to the use of the five-wire coreless strand 1 as the component of a three- or multistrand rope construction, that is, 3x5, 4x5, 5x5 that the proposed technical solution is advantageous over the heretofore-known ones in that it provides the maximum value of the generalized index I characteristic of the adhesive and fatigue strength characteristics of the proposed construction.

Landscapes

  • Ropes Or Cables (AREA)
EP94100757A 1993-04-23 1994-01-20 Twisted-wire product Expired - Lifetime EP0621368B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU93021503 1993-04-23
RU93021503/02A RU2075362C1 (ru) 1993-04-23 1993-04-23 Витое проволочное изделие

Publications (2)

Publication Number Publication Date
EP0621368A1 EP0621368A1 (en) 1994-10-26
EP0621368B1 true EP0621368B1 (en) 1997-08-27

Family

ID=20140900

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100757A Expired - Lifetime EP0621368B1 (en) 1993-04-23 1994-01-20 Twisted-wire product

Country Status (4)

Country Link
EP (1) EP0621368B1 (ru)
AT (1) ATE157409T1 (ru)
DE (1) DE69405143T2 (ru)
RU (1) RU2075362C1 (ru)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE622904A (ru) *
US5048280A (en) * 1988-12-27 1991-09-17 Sumimoto Electric Industries, Ltd. Steel composite cord

Also Published As

Publication number Publication date
DE69405143D1 (de) 1997-10-02
RU2075362C1 (ru) 1997-03-20
DE69405143T2 (de) 1998-01-02
ATE157409T1 (de) 1997-09-15
EP0621368A1 (en) 1994-10-26

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