SU1722736A1 - Method of securing electrode in electrode holder - Google Patents

Abstract

The invention relates to welding production and can be used in all areas of the national economy where manual electric arc welding is used. The purpose of the invention is to facilitate work in hard-to-reach places, increase the reliability of fixing and increase the service life of the electrode holder. In the head 2 of the electrode holder, screw 3 is attached with the handle 4. Electrode 5 is fixed to it, which is pre-installed in the hole 9 of head 2. Screw 3 axis is arranged perpendicular to electrode axis 5. After tightening the screw 5, handle 4 is rigidly attached to the screw positioning it parallel to the electrode. The thread pitch of the screw 3 is equal to the smallest difference in the diameters of the rods of the used electrodes. Concentric to the screw thread in the head 2, the groove 10 is made to a depth equal to the greatest difference in the diameters of the rods of the electrodes used. The groove 10 prevents the working surface of the thread from sticking to the spray, which increases the service life of the electrode holder. The use of a screw with a handle and a thread pitch equal to the smallest difference in diameters of the electrodes used allows the electrode to be securely fixed, and in the tightened position the screw handle is always parallel to the electrode, which ensures the compactness of the head, facilitating work in hard-to-reach places. 1 hp ff, 1 ill. (Ls

Description

The invention relates to the welding industry and can be used in all sectors of the national economy for the production of manual arc welding.

A known method of fastening an electrode in a fork-type electrode holder, which consists of a fork in the form of three steel rods in one direction, and a handle on which steel rods are rigidly fixed. This method of electrode fastening is ubiquitous and is used in the practice of electric arc welding in the suppressive Most cases.

The disadvantages of this method are; overheating of the holder during welding due to poor electrical conductivity of the steel; the long length of the cinder electrode remaining after welding (10 cm or more), which is necessary to remove the rest of the electrode from the holder by chircani on a rigidly fixed object; when the chircani is removed, the hot residue of the electrode flies off in any previously unknown direction, which can be the cause of a fire when welding under fire hazardous conditions; it takes an extra time to install a new electrode and remove the rest of the electrode using the chircan method; the absence of a l-shaped part in relation to the handle, which prevents welding with hard electrode in hard-to-reach places.

There is also known a method of fixing an electrode in an electrode holder containing an L-shaped head with a screw having a round head and an L-shaped clamp mounted on a handle, the current-carrying cable of which is placed in the handle with the possibility of axial displacement and rigidly fixed on L-shaped head.

The disadvantages of this method are: the difficulty of manufacturing the holder; inconvenience in operation caused by a power supply cable fixed on the L-shaped head and passing through the handle; the difficulty of welding in hard-to-reach places due to the presence of a round screw head; the possibility of putting splashing of molten metal onto the working part of the screw during welding with large diameters of the electrode rods, which at. welding with small diameters of the electrode rods will not allow the screw to be screwed into the L-shaped head and thus will not ensure reliable contact of the electrode rod with the holder.

The purpose of the invention is to provide work in hard-to-reach places, increasing

reliability of fixing the electrode by making screw with a thread pitch equal to the smallest difference in the diameters of the rods of the used electrodes and increasing the service life of the electrode holder by making. in the head of the groove, concentric screw thread, to a depth equal to the greatest variety of rod diameters of the used electrodes.

0 The drawing shows the electrode holder.

The electrode holder contains a metal case 1, made, for example, of copper, the head 2 is L-shaped,

5 made in one piece with the housing 1, the screw 3 with the handle 4 fixed on its upper part, the axis of which is perpendicular to the axis of the screw 3 and parallel to the electrode 5 with the rod clamped tightly

0 electrode 5, knob 6, bolt 7, with. which the current-carrying cable 8 is attached to the electrode holder 8. Hole 9 serves to fasten the electrode rod 5 in the head 2 of the L-shaped form. Screw 3 has

5 thread, for example, M8 with a pitch equal to 0.5 mm.

The handle 4 is fixed to one of the ends, for example, by welding on the screw 3 perpendicular to its axis after

0 screw 3 tightly. Presses the rod of the electrode 5 to the wall of the hole 9 so that the handle 4 is parallel to the rod of the electrode 5. This provides the same arrangement of the handle 4 relative to the rod of the electrode

5 5 when attaching the rod electrode 5 of any other diameter. In the upper part of the threaded hole, into which screw 3 is screwed, an opening 10 is made to protect the working part of the screw thread 3 from falling

0 spray molten metal. The depth of this hole is equal to the greatest difference between the used diameters of the electrode rods.

The method is carried out as follows,

The rod of the electrode 5 is inserted into the hole 9 of the head 2 of the L-shaped form and firmly pressed with the screw Zc by means of the handle to the wall of the hole 9. At the same time

0, the handle 4 is parallel to the rod of the electrode 5, which provides the convenience of welding in hard to reach places. The welding process begins. After the further use of the electrode becomes impossible (its length reaches 3-4 cm in this case), welding is stopped, screw 3 is unscrewed by turning the handle 4 at an angle equal to 90 °, and removing the electrode rod 5 from the hole 9. In the a hole is inserted a new rod electrode

of the same diameter and re-fastened. After this, the welding process is resumed.

If it is necessary to weld with a larger or smaller electrode diameter, the screw 3 is turned by turning the handle 4, respectively, unscrewed or twisted until the necessary clearance is established between the screw 3 and the wall of the hole 9. After that, the rod of the electrode 5 is inserted into the hole 9 and the screw 3 turns the handle 4 pressing the rod of the electrode 5 against the wall of the hole 9. In this case, the handle 4 is installed in the same position. The replacement of the electrode is carried out by the proposed method ..

The proposed method (in comparison with the known method) makes it possible to simplify working conditions in both ordinary and hard-to-reach places, to increase the reliability of the electrode holder, and to significantly reduce the consumption of electrodes.

Claims (2)

1. A method of securing an electrode in an electrode holder, in which an electrode is inserted into an aperture of the electrode holder head 5 and secured with a screw, the axis of which is perpendicular to the axis of the electrode, characterized in that, in order to facilitate work in hard-to-reach places and increase the After fixing the electrode at the free end of the screw, a handle is installed perpendicular to its axis, positioned, parallel to the electrode, and rigidly attached to the screw, while 5 use a screw with a thread pitch equal to the smallest difference in the diameters of the rods of the electrodes used, 2. The method according to claim 1, in accordance with clause 1 and so that, in order to increase the service life 0 electrode holder, concentric with the screw thread in the head, the groove is made to a depth equal to the greatest difference in the diameter of the rods of the used electrodes.