SU1335394A1 - Torch for arc welding - Google Patents

Abstract

The invention relates to welding equipment, in particular, to narrow-gap welding machines, and will find application in the chemical and energy industries, where automatic welding is widely used. The aim of the invention is to increase productivity by increasing the length of the welded joint with o ate with; o -U

Description

weld without interrupting the welding process and improving the quality of welds. The axial displacement mechanism of the holders 2 and 3 in the burner allows one to automatically alternately weld two electrodes 5 and 7. When the magnet system is turned off, one electrode is lowered, and when turned on, the other electrode and vice versa. In this case, the lifting of the working electrode is carried out

one

The invention relates to welding equipment, in particular to machines for welding in a narrow butchering, and will find application in the chemical, energetic industry, where automatic welding is widely used. The aim of the invention is to noBbmie productivity by increasing the length of the weld without interrupting the welding process and improving the quality of the welds.

Figure 1 shows the burner when the magnetic system is turned on, general view; figure 2 - diagram of the burner when the magnetic system is turned off; figure 3 - the same, when the magnetic system; Fig. 4 is a diagram of alternate displacement of the electrodes.

The burner includes a housing 1 with parallel electrode holders 2 and 3 placed in it, which contact the petals 4 along the inner perimeter with the housing 1. The first electrode 5 is fixed in the electrode holder 2 and freely passes through the hole 6 in the electrode holder 3, in which it is fixed the second electrode 7 is parallel to the electrode 5. The working ends of the electrodes 5 and 7 are located in the cut-off zone of the nozzle 8, screwed onto the housing 1, the current I ,, and the protective gas G. are supplied through the fitting 9.

With

A mechanism 10 for alternately moving electrodes 5 and 7 along their axes, consisting of a magnetic system II, is fixed to the housing 1 from the side opposite the nozzle 8, in the middle part of the opening 12 of which the middle part 13 of the hollow core 14 is rolled. The core 14 is divided into two parts 15

35394

after lowering another electrode.

Alternating the arc on the electrodes 5 and 7 increases the service life of the electrodes. Preserving the form of sharpening the electrode ensures the stability of the arc. The burner design provides high-quality crater welding, as one of the electrodes shuts off and the other brews a crater at this time. 4 il.

and 16, which are glasses in which springs 18 and 19 are placed on the rod 17, respectively. The springs 18 and 19 are concentrically located and have the opposite direction of winding. The rod 17 is rigidly connected to the nut of the core 14, passes through the electrode holder 2 and is rigidly connected to the electrode holder 3. The force P of the rod

gin 18 2-3 times more effort P

five

springs 1 9.

The torch for arc welding works as follows.

Before starting welding, the burner is in the inoperative position. In this case, under the action of the springs 18 and 19 of the parts 15 and 16 of the core 14 are located at a distance from each other. The movement of parts 15 and 16 occurs until the electrode holder 2 stops against the housing and the electric holder 3 to part 15 (FIG. 2).

Then set on the electrodes 5 and 7 the length of the arc: on the electrode 5 - the working length of the arc L, and on the electrode 7 - the original. The length of the arcs is provided by exposing the electrodes 5 and 7 in the electrode holder 2 and 3, respectively (Fig. 2).

The burner is then attached to the machine and the welding process is carried out. A welding current 1, a protective gas G is supplied to the burner through nozzle 9. The arc is excited from the electrode 5. The arc burns for a time from t to t in accordance with process 5. After this time has elapsed, power is supplied to the magnetic system 11 by supplying a control current lunp (FIG. 3). Here, the magnetic flux passing through the outer part and the ends of the mechanism 10,

0

closes in parts 15, 13 and 16. Under the action of magnetic flux, parts 15 and 16 move one towards the other, compressing the springs 18 and 19. Since the force P, j of the spring 19 is less than the force P of the spring 18, the part 16 begins and ends moving first (FIG. 3), which moves up to its stop into the middle part 13 of the core 14. Repeating the part 16 causes the rod 17 to move (lowering) and along with it the electric holder 3 with the electrode 7, which enters the zone burning the arc from the electrode 5. Next, begins lifting part 15 until it stops at part 13. Part 15 There is no rigid connection between the electrode holder 2 and electrode 5. As the electrode 5 moves upward, the arc is transferred to electrode 7. Welding is further carried out by electrode 7. Thus, an electrode with an operating length of an arc burns on electrode 7, and electrode 5 is set at a distance equal to P,.

After the time tj has elapsed, the magnetic system 11 is turned off and part 15 under the action of a stronger spring 18 moves with the electrode 5 from the initial position f (.- to the operating liter, while the electrode holder 2 slides along the rod 17 in the direction opposite to its movement. when the electrode 5 reaches the working position, the spring 19 moves part 16 in the direction of the force P and, through the rod 17, the electrode holder 3 moves the electrode 7 from the working position F to the original Py ;, while the electrode 5 enters the torch of the electrode 7 and when the voltage is over d n electrode 7 above the electrode 5 to the arc electrode 5.

In order for the electric electrode 45, which is located and 5 into the working area to move reliably, force P is spring closer to the working end of the burner, and us 18 should be greater than force P of spring 19 2-3 times. With a smaller value, the arc can be separated, since both electrons can be located 50 s at a distance greater than tear-off.

the other, with a cup located at the non-working end of the burner, said electrode holder made with an opening for the passage of the second electrode, and the second electrode holder made with a hole for the passage of the rod and rigidly connected with the glass located closer to the working end of the reel .

arc lengths. With a larger force ratio of the springs, the design of the burner becomes more complicated, since it is necessary to use more powerful magnetic

a system that overcomes the spring force.

When the arc is burned alternately at each electrode, the life of the electrode increases, as the time for its cooling increases, and consequently, the quality of the connection improves, since the ingress of tungsten particles into the weld metal is prevented due to overheating of the electrode. The proposed burner provides an increase in the productivity of the process of welding long joints, since there is no need

Claims (1)

replacement in the electrode and its additional sharpening. Preserving the shape of the sharpening of the electrode ensures the stability of the arc, and hence the depth of penetration. In addition, the use of the proposed burner noBbmiaeT is the quality of the welded joint due to the high-quality welding of the crater when welding ring seams, since one of the electrodes is turned off when welding the crater, and the other brews a crater at this time. Invention Formula A torch for arc welding, comprising a housing, two parallel electrode holders, one of which is mounted for movement in the direction of the axis of non-consumable electrodes Dov. characterized by that, in order to increase productivity by increasing the length of the weld and the weld without interrupting the welding process and improving the quality of the welds, it is equipped with a hollow core electromagnet, made in the form of two coaxially and spring-loaded towards the bottom of the glasses, facing apertures one towards the other, a rod located in the hollow core, one end connected to electrode holder, located closer to the working end of the burner, and the other is with a cup located at the non-working end of the burner, said electrode holder is made with a hole for passage of the second electrode, and the second electrode holder is made with a hole for passage of the rod and is rigidly connected with the glass located closer to the working end of the burner. g / c FIG. 2 / ucx ///////////// 7 a.J (r 7uP / 7 Editor I. Shulla Compiled by G. Kvartalnova Tehred M. Khodanich Proofreader A.T. Order 4005/14 Circulation 974Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4