CN2168680Y - Plasma welder - Google Patents

Abstract

The utility model belongs to a novel plasma arc welding torch device. A plurality of air ducts and inclined holes with minor diameters are arranged on a spiral centering body to cause gas to generate spiral air flow; the stiffness of plasma gas is improved, and the thermocompression function of plasma arc is enhanced; cooling water with rotational flow characteristic is arranged to cause a torch to be cooled to be axially cooled uniformly; the cooling effect of the welding torch is improved; the utility model has favorable functions of improving the welding quality, stabilizing welding arcs and compressing arc columns.

Description

Plasma welder

The utility model belongs to a kind of welding torch equipment of novel plasma arc welding (PAW).

The mode of supplying gas of welding torch is a key technology in the plasma welding connection technology.The mode of supplying gas in the past is radially to supply gas or tangentially supply gas.Under the same gas flow rate condition, radially the mode of supplying gas sprays gas vertically, has good deflection.But it is poor to restrain, and has influence on the compression to electric arc.Though the mode of tangentially supplying gas ion gas is contained effective, to the compression increase of electric arc, the deflection of gas will weaken.Its cooling water of common plasma welding torch is to enter water jacket from upper cutting gun, flows into lower gun body through insulation sleeve, and not only cooling effect is poor for this cooling water mode, and processing, and assembling is complicated.

The purpose of this utility model is to provide a kind of novel plasma welding torch, makes plasma gas produce spiral air flow, has promptly improved the deflection of ion gas, has compression again to electric arc, and under the situation that does not increase the water jacket size, increase film-cooled heat, improve heat-sinking capability.

The present invention realizes as follows: accompanying drawing is the structure chart of plasma welding torch, among the figure 1, nozzle, and 2, the gas shield cover; 3, gas distributor, 4, sealing gasket, 5, the gas distribution pad; 6, spiral centered body, 7, lower gun body, 8, felt pad; 9, tungsten electrode, 10, upper cutting gun, 11, the electrode dop; 12, locknut cap; 13, upper cutting gun water jacket, 14, inclined hole, 15, the lower gun body water jacket.The nozzle of plasma welding torch is to adopt the indirect water-cooling form.Cooling water enters the spiral groove type coolant jacket from the pipe joint of upper cutting gun 10, makes cooling water have the eddy flow feature and circulates out.Pass in and out the interface that cooling nozzle also is a cable simultaneously, the water power one.After electrode is clamped by dop 11, insert and make that electrode is anterior to be inserted in the spiral centered body 6 from upper cutting gun, the distance of adjusting between electrode and the nozzle is tightened locknut cap 12 at last.The good concentricity of electrode, easy to loading and unloading, arc maintenance, minor arc are stable.Be provided with several air drain on spiral centered body 6, and have the inclined hole 14 of minor diameter, the axis direction angle of the axis of inclined hole and spiral centered body is respectively 15 °-26 °, is advisable for 25 °-36 °.Ionized gas enters behind the rifle body behind several air drain through spiral centered body 6, enters minor diameter inclined hole 14 to center compression ejection, makes gas produce spiral air flow.Improve the deflection of ion gas, strengthened the hot compression effect of plasma arc.Protective gas enters gas distributor 3 through gas distribution pad 5, and the rubber gasket sealing is arranged between them.Air sifter by the gas shield cover flows to the welding protection district at last, forms the excellent protection gas hood.The deflection and the protection effect of protective gas have been improved.In order to improve cooling effect, be provided with spiral bosh at lower gun body 7, driven the bosh that forces of muscle sheet in the upper and lower rifle body water(-cooling) jacket 13,15.Make the cooling-water flow state have the eddy flow feature, can make the rifle body that is cooled, can cool off uniformly in the axial direction, improved the cooling effect of welding torch.

Welding torch is the assembly form, and water power, gas circuit are threaded, safety, reliable, rapidly, change conveniently, according to using the needs welding torch can make 75 °, 85 °, 90 ° or 180 ° of isogonisms, be fit to plasma arc welding (PAW).Owing to adopt the spiral mode of supplying gas, ion gas behind the spiral centered body, makes the plasma generation spiral air flow after radially enter the rifle body, and it had both improved the deflection of ion gas, also took into account the compression for electric arc.Owing to adopt the spiral groove type water(-cooling) jacket, improved the cooling effect of welding torch.For improving welding quality, stablize welding arc, good effect has been played in the compression of arc column.This welding torch is applicable to intermediate current plasma arc welding, and maximum current is 100 amperes during straight polarity direct current.

Claims (2)

1, a kind of plasma welding torch of being made up of parts such as nozzle, gas distributor, rifle bodies is characterized in that being provided with several air drain on spiral centered body [6], and having the inclined hole [14] of minor diameter, the angle of the axial direction of the axis of inclined hole and spiral centered body [6] is respectively 15 °-26 °, 25 °-36 °.

2, the described plasma welding torch of a kind of claim 1 is characterized in that being provided with spiral bosh in lower gun body, has driven the bosh that forces of muscle sheet in the upper and lower rifle body water(-cooling) jacket ［ 13,15 ］.

Images