SU1434013A1 - Method of plastic deformation of twisted wire articles - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hardware industry, and may be. It was used, for example, in the manufacture of wires containing a carrier part of steel wires, and the outer layer was made of a soft conductive metal such as aluminum or copper. The goal is to expand the technological capabilities of the reduction process by providing high-quality crimping of bimetallic billets with a soft material on the surface. The twisted billet is successively pulled through two portages. In the first die, the workpiece is crimped in the mode of boundary friction by 1 n / (l "2n) where n is the number of stitches in the workpiece. In this case, the portage rotates, twisting the workpiece between the fibers. Through the second filament, which is fixed, the workpiece is pulled in the mode of hydrodynamic friction. To facilitate the process of filling the blank, the first portage can be made in the form of a roller gauge mounted with the possibility of adjusting the angle of the rollers to the axis of the blank. S

Description

The invention relates to hardware industry and can be used, for example, in the manufacture of wires containing a carrier part of steel wires coated with a layer of soft conductive metal, such as aluminum or copper.

The aim of the invention is to expand the technological capabilities of plastic reduction of long twisted wire products by ensuring qualitative deformation of bi-metallic billets, the carrier core of which is made of steel- wire wires, and the outer layer is made of soft conductive metal such as copper or aluminum. .

The product is crimped in two successively located deforming-20 u1x devices, for example, a track, one of which is applied a torque, and the other is fixed motionless relative to the longitudinal axis. The bimetallic product first 25 degrades the route in the boundary friction mode in the rotating die until the diameter of the corresponding reduction is reduced,

E

1 (-n (T + 2n) 2

where 11 is the number of windings in the workpiece.

The compression in the next entrapped portage, e-string, is in the hydrodynamic friction mode.

The deformation with the specified crimp in a rotating die is the process of smoothing the soft metal of the product before filling the outer free space between the wires of the outer sheet metal. The perimeter of the product takes the form of a circle. Up to this point there are no conditions for the occurrence of non-contact deformation of the soft metal (steel wires are not deformed j and the soft metal fills the free space in cross section). Stratification is eliminated by twisting moment. With compression, exceed 1 - p

the value of yT begins35

40

45

50

(1 + 2p)

with the process of joint deformation of steel wires and soft layers of electrically conductive metal. Arising

Example. The method of plastic reduction of long twisted wires - the object 11th concerns the predominantly of the wires of power lines in which the number POVIV013 does not exceed six. To test the above mathematical dependence of the magnitude of the compression in the first along the portage, segments of the steel-alumi} of direct lines were used. AC in accordance with GOST 839-80 and PBSA wires according to TU 14-4-1236-83. The criteria for estimating the magnitude of the crimped1 in rotation with the (first) filament: kil 1 puffing up 1s wires of the wire before the first volley and the amount of residual sm on the surface of the wires outwardly after leaving the second fiber (with a pressure tube). The decrease in the amount of residual lubricant in comp. violation of the regime of hydrodynamic friction in the second portage, and can lead to a teaser in the process of deformation

The swelling of the wires in the wire before the first wire prevents you from the hydrodynamic friction mode in the second wire. The amount of residual lubricant in this case, e, is proportional.

The results of experimental verification are presented in the table.

The plastic compression of gfovodov was realized at the angular velocity of the first die, approximately equal to the speed of rotation of the rope magic rod when the corresponding path was twisted. In this case, the rate of the process of plastic crimping of the wire was equal to the linear (longitudinal) speed of

at the same time, non-contact deformation of the corresponding wire at 55

s

0 5

0

five

0

five

0

in the second in the course of shrink cap. This die is stationary relative to the longitudinal axis of the drawing, which significantly simplifies the deformation process in the hydrodynamic friction mode.

The process of filling the product is simplified if the initial deformation is carried out by rollers arranged in a rotating rotor, installed with the possibility of adjusting the gap between them and the angle of their location relative to the longitudinal axis of the product. With this, the longitudinal component of the deforming force reduces the total drag force.

Example. The method of plastic reduction of long twisted wire wires - Section 11y relates mainly to wires of power lines in which the number POVIV013 does not exceed six. In order to verify the above mathematical dependence of the amount of reduction in the first in the course of the portage, segments of the steel alloys} of the wires were used. AC in accordance with GOST 839-80 and PBSA wires according to TU 14-4-1236-83. The criteria for estimating the value of crimped in the rotating (first) wire service are: kil 1 puffing-up wire wires before the first wire and the amount of residual lubricant on the surface of the outer wire after leaving the second wire (with a pressure pipe). A decrease in the amount of residual lubricant in comparison with the optimal one indicates a violation of the hydrodynamic friction mode in the second portage and can lead to a tear in the deformation process.

Swelling of the wires in the wire before the first wire does not allow entering the mode of hydrodynamic friction in the second wire. The amount of residual lubricant in this case, e, was measured.

The results of the experimental verification are presented in the table.

The plastic compression of the gfovods was carried out at an angular velocity of rotation of the first die, approximately equal to the speed of rotation of the rope magnet when twisting the corresponding wire. In this case, the speed of the process of plastic crimping of the wire is equal to the linear (longitudinal) speed of

the soft metal outer layer is suppressed by the pressure of the lubricant created by the hydrodynamic friction mode

on the swirling magy.

For example, a PBSA wire was manufactured on a rope sneak SRN 12/500

in 224 mm increments with an angular velocity of rotation of the rotor of 800 rpm and a linear twisting speed of 180 m / min.

Plastic compression of the PBSA 50/70 wire was performed at a rotational speed of the first die 810 rpm and a drag speed of 180 n / min.

Claims (1)

The use of plastically crimped wires reduces their cost by reducing the diameter, which leads to a decrease in the load on the wire from wind, ice and increases the reliability of fixing the wire in the clamps. Invention Formula Method of plastic crimping of a twisted wire product by Prot AC 95/16 PBSA 50/70 AC 70/72 AC 95/141 AC 183/128 VNIIPI Order 5520/30 Circulation 342 Random polygons pr-tie, Uzhgorod, st. Project, 4 it is wound through two successively installed dies, the first of which is attached to a torque that twists the product between the dies, characterized in that, in order to broaden the technological possibilities, the compression in the first dredging process is performed in the course of the boundary process, and in the second drag, in the mode of hydrodynamic friction, while the amount of reduction in the first drag is determined by the formula 15  1 + n (HZnTJ where n is the number of stitches in the product. 2 2 22 21 23 12 eleven 13 eight 7 9 6 five 7 five four 6 No || there is Not There is no There is no there is Not eleven there is 23.1 3.1 18.4 2.8 17.0 1.6 11.3 1.3 14.0 1.3 Subscription