Contents №6–2009

   Science and technology 

Yu.N. Loginov
, Dr. Tech. Sc., Professor, Metal Pressure Treatment Department of Ural State Technical University; 
A.Yu. Zuev, Chief Technologist;
T.P. Kopylova, Technologist; 
ZAO SP “Katur-Invest”;
S.E. Shikhov, Manufacturing Engineer, Investigation Centre of OAO “Uralelectromed”.
Contact: kp@vniikp.ru

Determination of the copper wire work-hardening level during cold welding

The present-day drawing process can be hardly imagined without welding technologies. The joining of wire ends makes it possible to run the drawing process with the elimination of lengthy procedures of slandering the head ends, threading of drawing dies and capstans. An attempt is made in the paper to assess the strained state of copper wire in the process of cold welding at the stage of drawing. It is most likely that the conclusions achieved will be true for drawing of other materials, for example for aluminum.

Key words

Wiredrawing, welding technology, wire-drawing machine, cold pressure welding, wire peening, burr, metal cobbing, welding burr, burr removal, deformation, level of deformation shear, wire welding,  wellding rod, calculation of deformation level.

 Science and Technology.   Experience exchange.

D.G. Skripachev, Principal Manufacturing Engineer,
ZAO “Samara Cable Company”
Contact: kp@vniikp.ru

Increase of productivity when drawing round aluminum wire on ВСК-13 drawing machines

The paper describes the ZAO “Samara Cable Company” experience in using ВСК-13 drawing machine for drawing aluminum wire. Technical solutions aimed at increasing the machine productivity are suggested. An example of calculating the die set on the rebuilt ВСК-13machine for aluminum wire drawing is given. The suggested method may be used to reduce the drawing sequence in manufacturing various diameter wires. The calculation results are presented in the form of relative and absolute slip diagrams.

Key words

Wire-drawing machine ВСК-13, drawing sequence, aluminum wire drawing,   wire diameter, offset ratio,  relative and absolute slip diagrams.
 Science and Technology.   Scientific and technical discussions.

A.V. Petrov,
Associate Professor, Electroinsulating and Cable Technology Department of Tomsk Polytechnic University
Contact: kp@vniikp.ru 

Basic principles of calculating wire enameling caliber sequence


The paper presents a simple method for calculating diameters of wire enameling calibers taking into account physical and chemical processes that occur during varnish film formation and its structurization in the process of heating in the enameling furnace. It is shown that generalized quantity of varnish solid residue in wire enameling under plant conditions can be determined on the basis of the enameling machine caliber sequence and the insulating coating thickness.

 Key words

Wire enameling,  enameling coating thickness, calculation method of calibre diameter,   calculation of calibre sequence, enamel film, solid residual, film thickness, calibrating method of paint application.


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