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Fine steel cord with a low structural elongation

A technology of thin steel wire and elongation, which is applied in the direction of rope-making auxiliary devices, mechanical equipment, coatings, etc., and can solve problems such as belt prolapse, damage, and twisting

Active Publication Date: 2009-08-05
BEKAERT ADVANCED CORDS AALTER NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the width of the synchronous belt increases, its production is more prone to "twisting" effects (if a piece of belt is suspended freely, the free end will be twisted relative to the fixed end) or "saber" effect (if a piece of belt is The belt is placed on a flat surface, it will not be straight, but curled)
Both of these effects are very detrimental to the use of belts because they cause the belt to come off the gears

Method used

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  • Fine steel cord with a low structural elongation
  • Fine steel cord with a low structural elongation
  • Fine steel cord with a low structural elongation

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Embodiment Construction

[0059] In a first preferred embodiment, the inventors produced a cord of the 7×3 type, which is characterized by the following formula:

[0060] [(3×0.15) 9s +6×(3×0.15) 9s ] 8Z

[0061] That is: the core strand is composed of 3 twisted wires, the twist length of these wires in the S direction is 9mm, the core strand is combined with 6 outer strands to form a cord, the outer The strands also consisted of 3 wires twisted together with a twist length of 9 mm in the S direction. The strands are twisted into cords in the Z direction with a twist length of 8 mm. The wire is that of plain carbon steel with a carbon content of approximately 0.725 wt% C and has a hot dipped zinc coating. Cords are produced from threads according to the methods of the prior art and according to the method of the invention. The metal cross-sectional area of ​​the cord is 0.371mm 2 (according to DIN 3051, i.e. sum of wire cross-sections).

[0062] first by means of Figure 4a to introduce existi...

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Abstract

A fine steel cord for the reinforcement of synchronous belts is presented. The fine cord has a distinct load elongation curve characterized by a very low structural elongation (below 0.09% preferably below 0.06%), and a high equivaslent modulus between 0.2 and 20% of the breaking, load. The favorable results are maintained when the cords are coated with an elastomer coating. Such a fine steel cord reduces the geometrical spread on the tooth pitch of the synchronous belts during use. A method to produce such a fine steel cord is also presented.

Description

technical field [0001] The invention relates to a fine steel cord for reinforcing timing belts. Background technique [0002] Timing belts are used in many precision machinery, automotive, computer peripherals such as printers and copiers, positioning systems, and many other applications. In the prior art, the synchronous belt is also called "cogged belt", "drive belt", or "cog belt". In the following, the terms and definitions in the ISO 5288-1982 standard will be followed. Industry standards DIN7721-1989 and ISO 5296-1:1989 define the dimensions and tolerances of commercially available timing belts. Timing belts can be used in situations where the power transmission of the timing belt, or precise continuous or step displacement in the longitudinal direction is extremely important, or precise angular positioning must be achieved over long distances. A major requirement for timing belts is the tolerance of the pitch length (see ISO5288 for definition), which in turn deter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16G1/12D07B1/06D07B3/00F16G1/28
CPCD07B2205/2064D07B2201/2044D07B2501/2076D07B2207/205D07B1/0613D07B3/00D07B2207/203D07B2401/201F16G1/28D07B2207/208D07B2801/18D07B1/0693D07B2201/104D07B2401/202D07B2501/20
Inventor S·万孔佩诺勒P·布吕内尔B·范德贝肯
Owner BEKAERT ADVANCED CORDS AALTER NV
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