CN1006045B - welding torch - Google Patents

Abstract

The present invention is provided with a flexible duct in the welding torch, the purpose is to improve the stability of the arc, the method is to do a spiral winding of a metal wire to form the duct, the specific method is to insert the equipment into the winding of the bending part of the main body of the welding torch The middle part of the coil is sparse and the rest of the coil is tight so that the bends are as desired at the sparse part of the coil, limiting the vibration of the wire.

Description

Welding torch

The welding torch that uses in the relevant weld job of the present invention.

What Fig. 1 represented is giving an example of a kind of traditional welding torch, and the welding torch main body of the tubulose of number 1 expression among the figure has a sweep usually, uses the improvement weld job, and welding wire has a suitable camber, to improve the circulation of the 1 li electric current in welding torch end.The number of marking on a map 3 is conduits of a toughness, inside passes through for welding wire, and conduit can be used the plastic tube manufacturing, also can become a pipe with ductile metal line spiral wound.The number of marking on a map 4 is welding torch nibs, and label 5 is joints.

Generally as shown in Figure 2, the design of welding torch main body 1 requires the external diameter of their internal diameters greater than conduit, and between is provided with space 6, and welding gas can be passed through in this space 6.Therefore, conduit 3 is in the state that is easy to vibrate in welding torch main body 1, when 3 li feedings of welding wire conductive pipe, has just caused complicated vibration, and this is to cause the unsettled key factor of electric arc.

In order to address this problem, can consider a kind of method; With the main body 1 corral conduit of welding torch, to prevent vibration, very complicated but the structure of welding gas passage just becomes, cost is corresponding to be increased.

One object of the present invention is to propose a kind of welding torch, and electric arc has advantages of excellent stability, and cost is very low.

In order to achieve the above object, conduit among the present invention is to be formed by the metal wire spiral wound, around the middle part that twists in it, exactly always it is sparse to inject the curved arc part of welding torch main body, and it is tight at the remainder place, therefore a low rigidity section (sparse) and a high rigidity section (closely around the volume part) in conduit, have been formed around the volume part.

As knowing: (make the spiral shell volume) when a metal line is made spiral wound, the tension force when rolling-in is close is big, thereby the rigidity height, and low at tension force when volume is sparse, thereby rigidity is also low.

When injecting this conduit in the welding torch main body, it on demand (partly) locate bending in low rigidity (around rolling up sparse part).

And on the other hand, during the feeding welding wire in welding torch main body knee resistance maximum, it is believed that when the conduit that is positioned at this part becomes vibration source, vibration is just spread on whole conduits, if but on this part is used said local buckling conduit, vibration just is transformed into local concussion so, seldom spreads on the whole conduit and goes, and therefore can improve the stability of electric arc.

By the torch structure of this simple and inexpensive, the stability of electric arc can obviously improve.

Fig. 1 is a cutaway view, represents that of traditional welding torch gives an example; Fig. 2 is analysing and observe along the A-A line among Fig. 1; Fig. 3 a and 3b cut open figure and side view, represent a part of the conduit of welding torch of the present invention; Fig. 4 is a cutaway view of an embodiment of welding torch of the present invention.

Embodiment of the present invention are shown in Fig. 3 and Fig. 4.

Fig. 3 illustrates a conduit 10, and the metal wire in the conduit is around volume, and is sparse in the pars intermedia office of preparing reeve welding torch main body sweep, and tight at the remainder place, thereby makes sparse rigidity around the volume part be lower than remainder.Fig. 4 represents a section of welding torch main part, and at this moment the conduit shown in Fig. 3 10 has inserted welding torch main body 11.

In Fig. 4, label 11 is main bodys of welding torch, and there is the import installed part 12 of welding gas the inside, the outlet opening 13 of welding gas, prevent installed part 14 with back flow of gas, the internal diameter of welding torch main body 11 requires welding gas to flow by between in design greater than the external diameter of conduit 10.The end of conduit 10 usefulness welding torch main bodys 11 and the end of the anti-reverse stream installed part 14 of gas are supported on it on the central axis of welding torch main body 11, and welding wire is sent on its core.Conduit 10 is in the pars intermedia office near the sweep of welding torch main body 11, and the sparse of it has lower rigidity on volume, and local buckling just in this section in.The end of number 15 expression welding torches, 16 expression welding torch nibs, and joint of 17 expressions.

Claims (1)

1, a kind of welding torch, include the welding torch main body of a tubulose, the part that a bending is arranged above, there is a flexible conduit from this welding torch main body, to pass, passage as welding wire, above-mentioned flexible conduit is formed by the metal wire of making spiral wound, it is characterized in that the pars intermedia office around twisting near preparing insertion welding torch main body (11) sweep of above-mentioned flexible conduit (10) is sparse, and tight at the remainder place.

Images