The high-speed welding device and the welding method thereof of dual power supply bipolar electrode
Technical field
The present invention relates to a kind of high-speed welding device, particularly a kind of high-speed welding device and welding method of dual power supply bipolar electrode.
Background technology
Under the demand for development of Automation of Welding, manual intelligent, further improving speed of welding is the important channel of improving welding productivity.Because the critical speed of welding of conventional gas metal-arc welding is lower, surpass critical speed of welding and undercut can occur, further raising the hump welding bead can appear in addition weld seam discontinuous.Melt the rate of applying and limit undercut and hump welding bead defective if increase welding wire to increase welding current, be easy to cause the overheated of mother metal even burn.The modeling of double-side arc welding method that the by-pass shunt that proposes a kind of single supply was once arranged, but because the tungsten electrode shunting circuit of bypass does not have the power supply support, it is low to cause weld metal under the rapid welding to melt the rate of applying, and can't be applied to high-speed welding.Existing high-speed welding technology exists welding equipment complicated, the deficiency that welding cost is higher.
Summary of the invention
The invention provides a kind of high-speed welding device and welding method of dual power supply bipolar electrode, the weld metal that has solved existing rapid welding device and method existence melts the low problem of rate of applying.
The present invention overcomes the above problems through following scheme:
A kind of high-speed welding device of dual power supply bipolar electrode; Comprise argon tungsten-arc welding welding gun, gas metal-arc welding welding gun, the tungsten argon arc welding machine source of welding current, the gas metal-arc welder source of welding current, gas metal-arc welder ground wire, molten bath and mother metal; The positive pole of the gas metal-arc welder source of welding current is connected with the positive pole of the tungsten argon arc welding machine source of welding current; The input of the ignition tip of gas metal-arc welding welding gun is connected the anodal tie point place of the positive pole and the tungsten argon arc welding machine source of welding current of the gas metal-arc welder source of welding current; The power access end of argon tungsten-arc welding machine welding gun is connected with tungsten argon arc welding machine source of welding current negative pole, and welding wire in the gas metal-arc welding welding gun and the molten bath in the mother metal flexibly connect.
Between the input of the ignition tip of the anodal tie point of the positive pole of the gas metal-arc welder source of welding current and the tungsten argon arc welding machine source of welding current and gas metal-arc welding welding gun, be provided with the probe of Hall element current acquisition analyzer.
A kind of high-speed welding method of dual power supply bipolar electrode may further comprise the steps:
The first step, parts to be welded are processed into the groove of correspondingly-shaped according to the thickness size, and are fixed on the work stage;
Second goes on foot, the positive pole of the gas metal-arc welder source of welding current and the positive pole of the tungsten argon arc welding machine source of welding current is coupled together, and mother metal is connected with the power cathode of gas metal-arc welder;
The 3rd step, become 65 to spend angles and clamp with the axis of argon tungsten-arc welding welding gun the axis of gas metal-arc welding welding gun; And make plane that two welding guns form perpendicular to workpiece planarization; And the angle of gas metal-arc welding welding gun and workpiece planarization is 85 degree; Welding direction be the argon tungsten-arc welding welding gun preceding, the gas metal-arc welding welding gun after;
When the 4th step, welding, total current I can be adjusted between the 250-450 ampere according to the speed of welding variation, and tungsten electrode shunt current Ibp is adjusted between the 120-200 ampere according to the actual welding situation, and speed of welding is 0.9 meter/minute-2.5 meters/minute;
The 5th step, elder generation start gas metal-arc welder; After producing electric arc between welding wire and mother metal; Start the tungsten argon arc welding machine then, make between the welding wire in argon tungsten-arc welding welding gun and the gas metal-arc welding welding gun produce electric arc and stable after, the beginning high-speed welding;
The 6th step, analyze actual total current I, regulate electric current on the gas metal-arc welder according to actual needs according to Hall element current acquisition analyzer.
Adopt dual power supply that stable high-power support can be provided, the gas metal-arc welding power supply and the argon tungsten-arc welding power supply of component all keep original operating characteristic, the control shunt current size that the argon tungsten-arc welding machine can be stable.Through selecting suitable tungsten electrode shunt current can carry out the reasonable distribution of heat between welding wire and mother metal, the technology basis is provided for obtaining stable appearance of weld under the realization high-speed welding.Compare with existing high-speed welding device, both reduced production cost, can guarantee welding quality again, result of use is good.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Specific embodiment
A kind of high-speed welding device of dual power supply bipolar electrode; Comprise argon tungsten-arc welding welding gun 1, gas metal-arc welding welding gun 2, the tungsten argon arc welding machine source of welding current 3, the gas metal-arc welder source of welding current 5, gas metal-arc welder ground wire 6, molten bath 7 and mother metal 8; The positive pole of the gas metal-arc welder source of welding current 5 is connected with the positive pole of the tungsten argon arc welding machine source of welding current 3; The input of the ignition tip of gas metal-arc welding welding gun 2 is connected the anodal tie point place of the positive pole and the tungsten argon arc welding machine source of welding current 3 of the gas metal-arc welder source of welding current 5; The power access end of argon tungsten-arc welding machine welding gun 1 is connected with the tungsten argon arc welding machine source of welding current 3 negative poles, and the molten bath 7 in welding wire in the gas metal-arc welding welding gun 2 and the mother metal 8 flexibly connects.
Between the input of the ignition tip of the anodal tie point of the positive pole of the gas metal-arc welder source of welding current 5 and the tungsten argon arc welding machine source of welding current 3 and gas metal-arc welding welding gun 2, be provided with the probe 4 of Hall element current acquisition analyzer 9.
The positive pole 4 of the positive pole of the gas metal-arc welding source of welding current 5 of the present invention and the argon tungsten-arc welding source of welding current 3 couples together; The total current I of the two passes through the ignition tip of gas metal-arc welding welding gun 2 with filler wire; Hall element current acquisition device 9 is gathered actual total current I at this, and one part of current Ibp gets back to the argon tungsten-arc welding source of welding current 3 negative poles through argon tungsten-arc welding welding gun 1 and forms a loop in the arc column district of welding arc then; Another part current Ib m gets back to the gas metal-arc welding source of welding current 5 negative poles through molten bath 7 through mother metal 8 and forms a loop; Because the shunting in tungsten electrode loop; Electric current on the mother metal is minimized; Electric current on the welding wire is higher, so just can guarantee under the prerequisite of lower mother metal heat input, to improve the deposition rate of welding wire, thereby realize high-speed welding.
A kind of high-speed welding method of dual power supply bipolar electrode may further comprise the steps:
The first step, parts to be welded are processed into the groove of correspondingly-shaped according to the thickness size, and are fixed on the work stage;
Second goes on foot, the positive pole of the gas metal-arc welder source of welding current 5 and the positive pole of the tungsten argon arc welding machine source of welding current 3 is coupled together, and mother metal 7 is connected with the power cathode of gas metal-arc welder;
The 3rd step, become 65 to spend angles and clamp with the axis of argon tungsten-arc welding welding gun 1 axis of gas metal-arc welding welding gun 2; And make plane that two welding guns form perpendicular to workpiece planarization; And gas metal-arc welding welding gun 2 is 85 degree with the angle of workpiece planarization; Welding direction be argon tungsten-arc welding welding gun 1 preceding, gas metal-arc welding welding gun 2 after;
When the 4th step, welding, total current I can be adjusted between the 250-450 ampere according to the speed of welding variation, and tungsten electrode shunt current Ibp is adjusted between the 120-200 ampere according to the actual welding situation, and speed of welding is 0.9 meter/minute-2.5 meters/minute;
The 5th step, elder generation start gas metal-arc welder; Behind welding wire and 8 generations of mother metal electric arc; Start the tungsten argon arc welding machine then, make between the welding wire in argon tungsten-arc welding welding gun 1 and the gas metal-arc welding welding gun 2 produce electric arc and stable after, the beginning high-speed welding;
The 6th step, analyze actual total current I, regulate electric current on the gas metal-arc welder according to actual needs according to Hall element current acquisition analyzer 9.
Different with conventional gas metal-arc welding; The welder of dual power supply bipolar electrode is under the advantage that does not increase welding equipment complexity and welding cost; Shunt and provide the power support through increasing a bypass argon tungsten-arc welding system circuit, make that the electric current on the mother metal is minimized, the electric current on the welding wire is higher; So just can guarantee under the prerequisite of lower mother metal heat input, to improve the deposited rate of melting of welding wire, and then provide technology basic for high-speed welding.