DE868546C - Sheathed arc welding electrode - Google Patents

Description

(WiGBl. P. 175)

ISSUED FEBRUARY 26, 1953

M 9365 Ib 149h

The previously known double or multiple coated arc welding electrodes exist from the core wire and two or more cylindrical sheaths, from fluxes, slag formers and protective gas generator η with binders, the components and their amounts in the individual cases are different. They are manufactured either by dipping or by pressing, wherein the manufacture of each casing requires at least one operation.

According to the invention, the variously composed mixtures of the above Substances applied to the core wire in segments of a single cylindrical sheath. Through this There is not only the possibility of applying all mixtures to the core wire in one operation to press open, but there are also considerable welding-technical advantages. One chooses for example, as one of the mixtures, one which is particularly good conductive for electrical current Composition, the power supply to the electrode can be continuously shifted because this conductive segment that establishes the electrical connection between power supply and core wire. The electrode can also be used for automatic welding machines, which is what the Since then the usual electrodes could only be reached by inserting metal wires into the casing. When welding steels of different composition, a sector-shaped For each type of steel, coated electrodes should primarily be supplied with the coating mixture that is most suitable for them. A major advantage of an electrode according to the invention is that the flux and slag formers in the more compact sector-shaped arrangement are considerably less Suffer evaporation and therefore get into the melt in a higher proportion than with shell

The production of electrodes encased in the form of a sector is very simple. Depending on the number and position of the individual segments, dividing walls are placed in a press cylinder and the press piston is accordingly broken down into a number of segment-shaped partial pistons each sector of a press die, divided radially by partition walls, each consisting of a press cylinder ^; -Fill with ίο undivided piston. The individual sectors of the sheath bind firmly to one another at their abutment surfaces, and resulted in a cylindrical sheath of the welding wire that met all requirements. -

PATENT APPROACH:

i. Covered arc welding electrode with two or more different mixtures of fluxes, slag formers, protective gas generators and binders, characterized by a sector-shaped arrangement in the cutting circle of the individual mixes around the core wire.

2. Process for the manufacture of guards Arc welding electrodes according to claim 1, characterized / characterized by the fact that all sec-

^: toiren in one operation with the help of a corresponding sector-shaped split 'press cylinder and piston are pressed onto the core wire.

3, method of making wrapped Arc welding electrodes according to Claim 1, characterized in that all sectors Simultaneously in one work step with the help of a nozzle divided into sectors are pressed on, the sectors of which are each loaded with pistons by an undivided cylinder will.

15725 2.53

Claims (1)

Issued on March 28, 1953 Supplementary form to the patent specification Mr. 868 546, class ₀ 49 h _# Gr »36/02. The patent 868,546 is by. final decision of the federation epatentgericht of 12e7 «1962 thereby partially declared null and void, that patent applications 1 and 3 will be deleted "