SU1338989A1 - Plant for gas-shielded arc welding - Google Patents

Abstract

The invention relates to gas-shielded welding and can be used in the welding industry of various industries. The aim of the invention is to improve the quality of welded joints by sucking aerosol from the welding zone when welding with a non-consumable electrode. The installation for arc welding in shielding gas comprises a housing 1, an electrode 2, covering its casing 11, a device for supplying protective gas, as well as an ejector. The device for supplying the protective gas is made in the form of two coaxially mounted rollers 5 with holes located along their perimeter. The ejector is made in the form of an axis-mounted tube 6 having an internal longitudinal partition 7 placed in the middle of the tube in the area between the rollers 5 and attached at one end to the bottom of the tube. Under the partition 7 there is a hole, on the edges of which the casing 11 is fixed. This installation allows to exclude operations of welding, straightening and additional control, i.e. increase productivity and reduce the cost of welded structures. 2 Il. § (L CO from 00 to 00 CO ozu Aram

Description

one

The invention relates to gas-shielded welding and can be used in the welding industry of various industries.

The aim of the invention is to improve the quality of the welded joint by providing a suction from the welding zone of the welding aerosol when welding with a non-consumable electrode.

FIG. 1 shows the installation, section; figure 2 - section aa in figure 1.

The installation consists of body 1, non-melting electrode 2, insulated from body 1 by a washer 3. Bearings 4 are mounted in case 1, which are rigidly connected to rollers 5, ensuring their rotation and movement along the welded part. An axis 6 of the rollers 5 is provided with a tube 6 for ejecting gas from the welding zone. In the tube 6 there is a partition 7 attached at one end to the lower part of the tube 6. The housing 1 is connected to the posts 8 supporting the tubes 9 for supplying protective gas to the weld zone and the tube 6. The tubes 9 for supplying protective gas are placed in the bottom part of the installation coaxially with the hole 10 in the rollers 5. In the tube 6 in the gap between the rollers there is a hole to which the electrode housing 11 is docked.

The installation works as follows.

The installation is installed in the working position on any of the welded parts. Protective gas through the tube 9 and the holes 10 in the rollers 5 gets on the welded part. Ignite the arc and begin the process of welding. At the same time include the engine which causes the rotation with the help of bearings 4 rollers 5, pressing the welded edges.

Due to the discharge created under the partition 7 by air supplied through the ejector tube 6, harmful gas and dust emissions generated in the weld zone are sucked through the casing 11 into the tube 6 and move together with the air through the tube 6, and then enter the flexible discharge hose.

The proposed installation for arc welding in shielding gas provides an improvement in the quality of the welded

13389892

joints by suction from the welding zone of the welding aerosol when welding with a non-consumable electrode. Suction of welding aerosol from the welding zone is carried out with the help of air, which cools the elements of the installation and eliminates the ingress of harmful gases into the arc zone. The use of a shielding gas supply device in installation 10, made in the form of two coaxially mounted rollers that move along the edges to be welded, allows increasing heat removal from the surface of the part and reducing residual deformations after welding. Suction of harmful gases from the arc zone while ensuring uniform protection creates improved operating conditions.

20 installation, ensuring the quality of the joint to be welded.

Example. Weld plate made of aluminum alloy AMG-6, 2.0 mm thick welding mode: force

25 current 70 A, welding speed 18 m / h, voltage on an arc of 8 V. By filming the process, it was found that when welding with the help of the device proposed, there was practically no ejection of aerosol within the limits of the device casing. All used protective gas - argon - does not go beyond the limits of the internal cavity in the process of welding, located between

35 rollers. All gas, together with the aerosol, is trapped by air and released from the weld zone through the hose.

The installation allows improving the quality of the welded joint by

40 ensuring the suction of welding aerosol from the welding zone and reducing residual deformations, and also eliminates the operations of welding, straightening and additional control, consequently, increase productivity and reduce the cost of welded structures. The suction of gases is produced by limiting the space created by the rollers; therefore, the efficiency of suction is increased.

55

Claims (1)

Invention Formula A shielding gas arc welding device comprising a gas supply device in the form of two coaxially mounted rollers with openings along their periphery, characterized in that 55 Invention Formula A shielding gas arc welding device comprising a gas supply device in the form of two coaxially mounted rollers with openings along their periphery, characterized in that  1338989 improving the quality by providing a section between the rollers and the suction-attached aerosol from the welding zone, it is at one end supplied to the lower part of the pipe with an ejector drilled into the tube, while under the partition there is an opening connecting the tube of the pipe, having an internal partition with a casing rigidly fixed on ku placed in the middle of the tube on the tube and covering the electrode, ( eleven FIG. 2