UA73214C2 - Method for production of two-layer twisted wire articles - Google Patents

Abstract

Invention relates to the metallurgical production, in particular, to the branch of manufacture of the cord with wire spiral insert, which is used for reinforcement of tires of conveyer lines; the high pressure hoses and other mechanical rubber goods, and ropes and cables. The method for manufacture of two-layered twisted wire articles contains the simultaneous lay of core and external layer. Central core and finished article are twisted by the method of dual winding with different pitches in one technological operation, moreover, central core is twisted with previous tO and then twisted (at identical direction of core lay and external layer SS or ZZ) or untwisted (at opposite directions of core lay and external layer ZS or SZ) simultaneously with the operation of lay of two-layered flat wire article in accordance with the following dependence: where - previous pitch of core lay; - final pitch of core lay; - pitch of twisted wire article; (-) - for twisted wire article with identical direction of core lay and external layer SS or ZZ (at left-side winding of core S and external layer S, or with right-side winding of core Z and external layer Z); (+) - for twisted wire article with opposite direction of core lay and external layer ZS or SZ (at right-side winding of core Z and left-side winding of external layer S or at the left-side winding of core S and right-side winding of external layer Z). Method ensures the high rate of working finished article, increases the service life of mechanical rubber goods during operation, and the lower cost of articles.

Description

Description of the invention

The invention relates to metallurgical production, and more specifically to the field of metal cord production, which is used to reinforce tires of conveyor lines; high-pressure hoses, other rubber products, as well as ropes and cables.

There are known methods of producing a metal cord containing a central core and an outer layer, which have the same or different wire diameters; the same or opposite direction of twisting and different steps of twisting, is produced in two technological operations, that is, the twisting operations of the core and the outer layer of the metal cord 70 are carried out separately and on different types of twisting machines 1112 1.

The disadvantage of this method is low productivity and high cost.

As a prototype, a two-layer compact metal cord containing a central core and an outer layer made of the same or different diameters of wires was adopted as a prototype. With this method, the metal cord is produced with the same direction and step of twisting the wires of the core and the outer layer 19.

The disadvantage of this method is the formation of a metal cord structure, in which the "phenomenon of wire migration" is manifested, that is, in practice, when used in tires, one or more wires move along relative to the adjacent ones and protrude at the end of the cord, puncturing the tire, putting it out of order.

The second disadvantage of this method is the lack of possibility of manufacturing two-layer twisted wire products in one technological operation with different steps of twisting the central core and the outer layer.

The task of this invention is to propose a method of manufacturing double-twisted double-layer twisted wire products with different twist steps with a high degree of processing.

The next task of this invention is to propose a method of manufacturing two-layer twisted wire products, increasing the anchoring ability of threads and preventing migration (9 wires) from the structure of the product during operation, increasing the service life of rubber products during operation and ensuring a lower cost of the product.

The technical result achieved when using the product consists in achieving a high degree of processing and improving the quality of the product, due to the increase in the anchoring ability of the wires that make up the structure of the product. "--

The solution to the problem is provided by the fact that the proposed method of manufacturing twisted wire products by the double twisting method includes the simultaneous twisting of the core and the outer layer, in which the central core and the finished product are twisted by the double twisting method with different twist steps in one technological operation.

З At the same time, the central core is twisted with the previous U, and then twisted, with the same direction - twists of the core and the outer layer Z5 or 77 (with left-handed twisting of the core 5 and the outer layer

With or with right-handed twisting of the core 7 and outer layer 7), or unscrewed in opposite directions of twisting of the core and simultaneously with the operation of twisting the outer layer 75 or 57 (with "right-handed twisting of the core 7 and left-handed twisting of the outer layer 5 or with left-handed twisting of the core 5 and right-hand twisting of the outer layer 72), simultaneously with the operation of twisting a two-layer twisted wire product according to the following relationship: their - the final step of twisting the core; o It is the step of twisting a twisted wire product.

HF (-) - for a twisted wire product with the same twisting direction of the core and the outer layer (55 or 77). -y ( w-) - for a twisted wire product with the opposite direction of twisting of the core and the outer layer ( 75

T" or 57).

The method includes simultaneous twisting of 2...7 wires of the core and 4...15 wires of the outer layer. The wires of the core have the same or different diameter with the wires of the outer layer of the twisted product. Predominantly two coated or uncoated wires made of high-quality steel with a carbon content of 0.65 -1.095 are used. (F) This problem is solved using the method of double howling when twisting the core and itself

A two-layer twisted wire product in one technological operation, with different steps of twisting, and with the same (55 or 77) or opposite (75 or 57) twisting directions. At the same time, the core wires are twisted with a previous twisting step Y, much larger than that required by the finished product with the same direction of twisting of the core wires of the outer layer of the twisted wire product (55 or 277), or with a previous twisting step b, much less than that required by the finished product with the opposite direction of twisting of the wires of the core of the outer layer of the twisted wire product (25 or 57).

Achieving the required twist step of the core wires in the finished two-layer wire product, manufactured with the same twist step of the core wires and the outer layer (55 or 77), is carried out by twisting the previous step of the core twist to the final step of the ЯИК twist by simultaneous operation of twisting the twisted wire product with a step twists (p

In the manufacture of a two-layer twisted wire product with the opposite direction of twisting of the core wires and the wires of the outer layer (275 or 57), the desired step of twisting of the core wires in the finished twisted wire product is achieved by twisting the previous step of the core twisting Y to the final step of the IC twisting by a simultaneous twisting operation twisted wire product with a twist step (art.

As a rule, 2-7 wires are included in the core, and 4-15 wires are in the outer layer. The wires of the core have the same or different diameter with the wires of the outer layer of the twisted product. Coated or uncoated wires made of high-quality steel with a carbon content of 0.65 - 1.090 are preferred. 70 Thus, in the manufacture of a two-layer twisted wire product with the same direction of the wires of the core and the outer layer (55 or 77), the number of turns required to form the final step of the core twist is determined by the sum of the number of turns required to form the twist step of the twisted wire product and the previous step of the core twist .

Хх хх ук 75 Her her from here: the previous step of twisting the core wires

It eats ZhK t (0 and ik g

When manufacturing a two-layer twisted wire product with opposite twisting directions of the core and outer layer wires (75 or 57), the number of twists required to form the final step of the core twist is determined by the difference in the number of twists required to form the previous steps of twisting the core wires and the twist step of the finished product c хз their father

Its beat is from here: the previous step of twisting the wires of the core, and this is from Z

Go with or: . and

The ratio of the step of the twisted wire product to the previous step of twisting the core: according to (1) is: so iv Lask b, 8) y i ik ik according to ( 2 ) is: « 1 iv zvo iv. With s and yik yik ;" In the proposed twisting method, the linear extraction speed of the retina twisted by a double twist with a successive step Yu is set by the extraction device of the module of the double twisting of the wire product and, accordingly, is equal to the linear extraction speed of the twisted wire product Mt - and Moyu - Mwt o hence: we verify the correctness of the calculations of the previous step twists of the core yu Mt 8 tsu 5 Mo

I» The ratio of the rotation speed of the rotors of the double-pre-twist core module (М b) and the double-twist rotors of the finished twisted wire product (Mu) is determined by the expression: hence: the rotation speed of the rotors of the double-pre-twist core module:

Me. then. t 34 o Ma oyu OS de: de (-) - for a twisted wire product with the same twisting direction of the core of the outer layer (55 or 77). (8 - for a twisted wire product with opposite twisting directions of the core and the outer layer (75 60 or 57).

In fig. schematically shows the method of manufacturing a two-layer twisted wire product according to this invention.

The essence of the proposed method is to combine the operations for the manufacture of the central core and the finished twisted wire product into one technological operation, by connecting to the existing double-twisting machine. , consisting of a static unwinding module (1) and a double torsion module (2)

additional double torsion module (3).

This method includes the following components: unwinding the first group of wires forming the core from the request coils (4) and twisting them into the core (5) in the double winding module (3) with a previous step

Twists Yu.

The twisting of the wire into the core is carried out due to the rotational movement of the rotors (6) and flywheels (7) of the double-twisting module ( З ) and the gradual movement of the core with the linear speed of the drawing MU, which is set by the drawing device (8) of the double-twisting module of the two-layer twisted wire product (2 ) and, accordingly, equates to the linear speed of drawing a twisted wire product ХУ t 70 The next stage is the passage of the core formed with the previous step of twisting о and the second group of wires from the request coils КК(З), static unwinding module (1), through the distribution template ( 10); forming sleeve (11) and crimping dies (12) for forming the outer layer around the core.

The next stage includes feeding the preformed double-layer twisted wire product to the drive rollers (13), flywheels (14), reversing roller (155, extraction device (7), torsion (16), /5 correct device (17) and to the receiving coil (18) module of double winding of a two-layer twisted wire product 74 Simultaneously with the process of winding a two-layer twisted wire product, the winding of the previous step of twisting the core o to the final step (y) is carried out, if the core and the outer layer have the same direction of twisting (55 or 77). In this direction the rotation of the rotors and flywheels of the core pre-twisting module (3) and the double-twisting module of the double-layer twisted wire product (2) 7 is opposite (Z2 or 25).

If the double-layer twisted wire product has the opposite direction of twisting of the core and the outer layer, in this case, in the process of twisting the twisted product with the twisting step (4 in the module of the double twisting of the twisted product (2), the previous step of twisting the core is unscrewed (o to the final twisting step ( At the same time, the direction of rotation of the rotors and flywheels of the module of the previous - double twist of the core (3) and the module of the double twist of the twisted wire product (2) is the same (55 or 27).

In the proposed method (see fig.), instead of the static unwinding module (1), you can use module i) with rotary unwinding, that is, with winding of the wires of the outer layer, as well as a double or single external winding device (torsion).

We will demonstrate the method of production of a two-layer twisted wire product using an example: "g zo a) Production of a metal cord of the construction 2-7 x 0.23 55 with the same direction of winding of the wires of the core and the outer layer ( 55 or 77). --

Initial data: p

The speed of rotation of the rotors and flywheels of the metal cord twisting module is 325 rpm. co

The twisting pitch of the metal cord is 12.5 mm

The final step of twisting the wires of the core b, ЗМммМ

We find:

The ratio between the number of revolutions of the rotors of the module of the pre-twisting of the core and the module of the double « zk : du rutka metapokorau (yuyu -o s Ker sta pOV

Kk ':z» The number of revolutions of the rotors of the module of the double twisting of the core wires: sh- Mt ti 7 ku -3250 (0125-63). 1984 rpm yk b -i Previous step of twisting the wires of the core: z v- Tk - 125753 -127mm her 125-633 y Checking the correctness of the calculations of the previous step of twisting the core: -oUu 70 v- Mayit 1250 7155 -4127mmMM

Me z199 t» b) Production of a metal cord of the structure Z x 0.20 и- 6 x 0.35 57 with the opposite direction of twisting of the core wires and the wires of the outer layer (25 or 57):

Initial data:

GF) The speed of rotation of the rotors and flywheels of the metal cord twisting module is 250 rpm.

Twist pitch of metal cord 18.0mm o Final twist pitch of core wires 10, Ohm 60 We find:

The ratio between the number of rotations of the rotors of the module of the double-pre-twisting of the core and the module of the double-twisting of the metal cord: k-t -48MO ha yik 18 -100 bo The number of revolutions of the module of the double-pre-twisting of the wires of the core sh- Mt ti Ya Yiku 320810) atopobl yav. ik 10

The previous step of twisting the core: same day 18 vase tmm yt 0018-10

Checking the correctness of the calculations of the previous step of twisting the core wires:

Yo - Mvt - ZO TIV - B.43MmMm

Me o to Compared with metal cord 2 - 7 x 0023 55i Zx 020 i- 6 x 0.35 57, manufactured with different steps of twisting the core wires and the finished metal cord in two separate operations, when manufactured according to the new technology, productivity increases to 6095. New the technology excludes the possibility of migration of the threads of the twisted wire product. However, the new method is used mainly in the production of metal cord with the same /5 twisting direction of the core (55 and 227). When manufacturing a metal cord with the opposite direction of twisting of the core, the use of the new method is limited by the high speeds of the rotors and flywheels of the module of the previous - double twisting of the core.

Sources of information: 1. Patent: OB. 3,358,345 dated 1967-12-19, 2. M.A. Bukstein. "Production and use of steel ropes" M. Metallurgy 1973, pp. 235-236.

Z. Patent: 55609014 dated 1997-03-11 (prototype).

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Claims (2)

The formula of the invention "40 1. The method of production of two-layer twisted wire products, which includes the simultaneous winding of the core and o, c of the outer layer, which is characterized by the fact that the central core and the finished product are twisted by the method of "double twisting" with different winding steps in one technological operation, and the central core is twisted with the previous step y,, and then twisted (with the same direction of the core and the outer layer 55 or 77) or unscrewed (with the opposite direction of winding of the core and the outer layer 75 or 57), simultaneously with the operation of winding a two-layer twisted of a wire product according to the following dependence: о ев 2 жк бещу t Her. ик ик where: - и5- the previous step of the winding of the core; из» ик- the final step of the winding of the core; yt - pitch of the twist of the twisted wire product (-) - for a twisted wire product with the same winding direction of the core and the outer layer 55 or 77 (with left-handed twisting of the core 5 and outer layer 5 or with right-handed twisting of the core 7 and Ф, outer layer 7); име) (9 - for a twisted wire product with opposite winding directions of the core and outer layer 25 or Z2 (with right-handed twisting of the core 7 and left-handed twisting of the outer layer Z or with 60 left-handed twisting of the core 5 and right-handed twisting of the outer layer 7). 2. The method according to claim 1, which differs in that it contains simultaneous winding of 2...7 wires of the core and 4...15 wires of the outer layer. C. The method according to claim 1 or claim 2, which is distinguished by the fact that the winding of the product is carried out from wires of the same or different diameters. 65 4. The method according to one of claims 1-3, which is characterized by the fact that coated or uncoated wires made of high-quality steel with a carbon content of 0.65...1.095 are used for the manufacture of products. Official bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated microcircuits", 2005, M 6, 15.06.2005. State Department of Intellectual Property of the Ministry of Education and Science of Ukraine. with (8) " "- with so and - shi with;" -And (95) ime) - 50 s» F) name) 60 b5