SU58078A1 - Method of making shaped tubes - Google Patents

Description

The invention relates to a method of manufacturing shaped tubes, for example, tonearms to a gramophone, from bimetal, double-walled tubes and others by electrolytic deposition of metals.

According to the present invention, for the purpose of sequential deposition of copper, iron and other electrolysable metals, to obtain bimetallic shaped and cylindrical tubes, it is proposed to use separate electrolytes, interrupting the electrolysis process — to obtain double-wall tubes and resuming it after oxidation initially obtained by the surface.

In order to obtain these surfaces and the uniform thickness of the product during electrolysis, it is proposed to apply alternating current superimposed on a constant one.

In the implementation of the proposed method, as a cathode, conventional forms, having a cavity inside, are filled with a gland), have a low-melting substance, for example, narwfium, BOcKOvr, chiffure, etc., on which a layer of graphite is deposited or silver nitrate deposited is recovered to metal

(to increase the electrical performance), after which the form is fixed on the rod and placed in a bath containing the electrolyte: for copper deposition - an acidic sulfuric acid aqueous solution of copper salts, for precipitating iron fluids - an aqueous solution of iron chloride salts and chloride salts oksi or rub. In the first case, copper serves as an anode in the form of scraps, sawdust, etc., in the second, iron is of normally commercial quality.

In order to obtain double-skinned tonearms, a form with a copper layer already deposited of a predetermined thickness is extracted V.3 of the bath into the air for OKJttissue of the surface sieTa.uia, which is achieved by lifting the rod in the holder. After the copper layer acquires a brown tint (which happens quite quickly, one two milliliters) T fbr under the current is immersed in the electrolyte, where it is, because of the presence of oKiic.w KOKOTopoif electrical conductivity, it is:

In the case of “walking”, it is necessary to wipe the edges of the tube with a monstrous one, the latter is wiped with a BRUSH. Moisturized in a water with a sulfuric acid.

For iron tubes, double-walling is obtained by interrupting the supply of current for half a minute, after which the process is resumed and continues until a second metal layer of the required thickness is obtained.

The preparation of bimetallic materials and other tubes is carried out by moving the mold with a deposited layer of copper, about 0.2 mm thick, and into an electrolyte bath for the subsequent deposition of an iron layer. In order to obtain smooth surface electrolytically manufactured tubes, during the process itself or at the end of it, an alternating current is introduced into the operating DC circuit, which exceeds the DC current by a certain amount, which makes it possible to redistribute the metal on the surface of the product.

The quality of tonearms and other electrolytically obtained tubes is significantly higher than the quality of tubes made by ordinary ones. viscosity, hardness and resistance to compression can be adjusted in the required direction by selecting the appropriate current density and concentration of solutions. In particular, the acoustic qualities of tonearms made by electrolytic means are much higher than those of tubes made by anyone else mechanically, since the crystallization axes of the metal being electrolyzed are perpendicular to the plane of its deposition, which has a much lower Cf (

shumy arising on the basis of own forced oscillations of the tonearm walls.

The manufacture of double-walled tonearms and bimetal further enhances these acoustic qualities, since the presence of two pipes having different diameters does not allow for oscillations of the inner wall and, thus, the appearance of any sparms based on the tone of the arm is excluded (the occurrence of the above hesitated)

In addition, the use of bimetal reduces the consumption of non-ferrous metals by 75-90 «/ o.

The subject matter of the invention.

Claims (2)

1. A method of manufacturing shaped tubes, including a number of tonearms to a gramophone, from bimetal, double-walled tubes, etc., by electrolytic precipitation {metals, characterized in that for the sequential deposition of copper, iron and other electrolysable metals with different electrolytes, interruption an electroplating process for the production of double-walled tubes, and resumed it after the oxidation of the originally prepared surface. 2. Acceptance of the method according to claim I, which is significant in that electrolysis uses alternating current superimposed on direct current in order to obtain smooth surfaces and uniform products.