SU1212736A1 - Method of arc machining of articles - Google Patents

Description

The invention relates to welding production and can be used in welding with the application of an alloying charge on a product, for example, in submerged-arc welding.

The purpose of the invention is to increase the coefficient of use of the alloying charge.

On. the drawing shows the device that implements the method

The device contains, in front of the city, the dispenser 1 of the preliminary flux, followed by it. the batcher 2 for feeding the charge and the batcher 3 for adding a flux over the interlayer of the charge, then the electrode 4, behind which; along the bottom of the welding apparatus there is a solenoid 5, the magnetic field of which is directed along the arrow 6 to the welding bath 7 on the part 8.

The method is carried out as follows.

Before the start of welding, flu is fed through dispensers 1 and 3, and the charge is fed to dispenser 2. Then, the electrode feeding mechanism 4 and the welding apparatus move from left to right (not shown) are simultaneously turned on, and the solenoid 5 is switched on. Flux entering the surface of part 8 The dispenser 1 is aligned with the front edge of the dispenser 2. A layer of the charge from the dispenser 2 is hung on this flux sublayer. From above, the layer of the charge is filled with the flux from the dispenser 3 so that an arc charge between the electrode 4 and part 8 melts the flux and the mixture. A portion of the charge is melted by the arc, into the weld pool 7, and the portion used is left behind the arc. The solenoid 5, located behind the electrode in the direction of movement of the welding machine at an acute angle to the longitudinal axis of the weld pool, creates a magnetic linear pulsating field, directed along arrow 6, which

Compiled by E.Somova Editor I.Pushnenkova Tehred M. Gergel Corrector G. Reshetnik

 Order 701/21

Circulation 1000 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch mm Patent, Uzhgorod, 4 Project St.

displaces the remaining charge in the flux and the liquid metal of the weld pool.

The movement of the particles of the charge in the direction of the weld pool occurs

due to the impact of pulsars on the magnetic field.

Thus, the proposed method allows to increase the utilization rate of the alloying mixture.

A welding tractor with a power source is used. The wire is welded with a diameter of 3 mm under flux of medium granulation. Speed

welding 12 m / h, welding current 450-500.A, voltage on an arc of 40 V. In the dosing process, the dosing unit serves the charge in the form of iron powder with a granulation of 44 µm, consumption of 1 kg per 1 m of pogonny

welding seam.

The solenoid is positioned in the direction of movement of the welding apparatus behind the electrode at a distance of 5 mm from the upper edge of the flux and at a distance of

15 mm from the electrode. During the operation of the apparatus and the production of welding, the solenoid is powered by a current of 0.1 A, a voltage of 60 V and a magnetic flux of 500 Oe is created, which moves

the charge remaining in the flux into the liquid metal of the weld pool.

After welding, the flux and slag are collected and passed through a permanent magnet. The amount of the remaining charge

on the magnet weighed. The amount of charge that did not enter the liquid metal of the weld pool is determined by weight.

I. .:.

On average, in the absence of a pulsating magnetic field, only 80%

The charge enters the liquid metal of the weld pool, and about 20% remains in the flux or on the slag. Using the proposed method and device, almost all 100% of the charge gets into the liquid metal of the weld pool, and less than 1% of the charge remains in the flux and slag.

Claims (1)

METHOD OF ARC TREATMENT OF PRODUCTS, in which the alloy powder is applied to the surface of the product and an arc is applied to the liquid weld pool, which is moved in the processing direction, characterized in that, in order to increase the alloy charge utilization rate, behind the arc, according to the processing course for the charge additionally act on a linear 'pulsating magnetic field directed at an acute angle to the longitudinal axis of the weld pool.