CN107160005A

CN107160005A - Pulse blow-out method heats the welding procedure of ultra-thin aluminum casting

Info

Publication number: CN107160005A
Application number: CN201710553871.XA
Authority: CN
Inventors: 贾红江; 李大斯; 邢金芝
Original assignee: Baosteel Group Xinjiang Bayi Iron and Steel Co Ltd
Current assignee: Xinjiang Bayi Iron and Steel Co Ltd
Priority date: 2017-07-09
Filing date: 2017-07-09
Publication date: 2017-09-15

Abstract

The invention discloses the welding procedure that a kind of pulse blow-out method heats ultra-thin aluminum casting, comprise the technical steps that：1st, using the welding method of argon tungsten-arc welding, select HS311 welding wires, the aluminum oxide of sealing cap surface must be carefully cleared up before welding with file, then the cracks on aluminum casting surface are toasted using oxyacetylene torch, treat that greasy dirt, moisture content overflow from cracks, flame is closed, is cleaned crackle and its both sides with water repeatedly with wire brush, until exposing metallic luster；2nd, run-on tab is prepared, using alternating-current argon arc welder WSE 350, after the completion of butt-welding fitting cleaning, preheated using the welding gun of small size tip, tip inclination angle is 25 30 degree, and welding gun is along direction of check rapid and uniform heating, and temperature control is below 300 degree, first moved to during welding after run-on tab striking to be welded, it is appropriate to draw high electric arc, reduce fusion penetration, the grease inside weldment is further overflowed using electric arc heat, and the oxide-film on weldment surface is removed using negative electrode fragmentation, stop welding.

Description

Pulse blow-out method heats the welding procedure of ultra-thin aluminum casting

Technical field

The present invention relates to the welding procedure that a kind of pulse blow-out method heats ultra-thin aluminum casting.

Background technology

Cold rolling dc motor oil film seal lid is cast aluminium material, complicated, and fluid side is semicircle ultra-thin cast aluminium, thick Degree only has 0.5mm, and crackle is through shape crackle.There is the impurity such as more sulphur phosphorus in its metallographic structure of cast aluminium alloy gold, and contain There is the low-melting-point eutectic composition such as slicker solder, in manual welding, the welding method such as gas welding, SMAW and carbon-dioxide arc welding Repair welding aluminium alloy castings is not all applied to.

The content of the invention

, can be effectively it is an object of the invention to provide the welding procedure that a kind of pulse blow-out method heats ultra-thin aluminum casting Ultra-thin aluminum casting is welded, extends its service life, it is ensured that production is normally carried out.

The object of the present invention is achieved like this, and a kind of pulse blow-out method heats the welding procedure of ultra-thin aluminum casting, including Following processing step：1st, using the welding method of argon tungsten-arc welding, HS311 welding wires are selected, must be carefully clear with file before welding Then the cracks on aluminum casting surface are toasted, heating-up temperature by the aluminum oxide of reason sealing cap surface using oxy-acetylene flame For 150 DEG C -200 DEG C or so, uniformly heated along cracks to both sides, temperature reach after continue 5-10 minutes, treat greasy dirt, moisture content from Cracks are overflowed, and close flame, are cleaned crackle and its both sides with water repeatedly with wire brush after stopping 1 minute, until exposing metal light Pool；2nd, run-on tab is prepared, using alternating-current argon arc welder WSE-350, after the completion of butt-welding fitting cleaning, the welding gun using small size tip enters Row preheating, tip inclination angle is 25-30 degree, and welding gun works as oil along direction of check rapid and uniform heating, temperature control below 300 degree Seborrhea, which goes out after volatilization the black dust and oxide-film produced, can be covered in weldment surface, after being cleared up again using wire brush Welding, using leftward welding, first at the transversal crack on aluminum casting both sides welding, finally the cracks in the middle part of aluminum casting are entered Row tack welding, is first moved to be welded during welding after run-on tab striking, suitably draws high electric arc, is reduced fusion penetration, is utilized electric arc heat The grease inside weldment is further overflowed, and the oxide-film on weldment surface is removed using negative electrode fragmentation, stop welding, use Initial current is adjusted to 20A, peak value electricity by wire brush last time cleaning face of weld, the suitable welding parameter of selection before welding Stream is adjusted to 60A, receives arc current and is adjusted to 20A, rising value is adjusted to 5S, and drop-out value is adjusted to 5S；When the 3rd, welding, weldering hard iron is protected with weldment inclination angle Hold in 65-70 degree, welding wire and weldment angle are maintained at 10-15 degree, pulse blow-out method is exactly ignited electric arc when pressing striking switch, Electric current rises therewith, and switch is clicked again at once in 5S, forces down electric arc to weld seam during peak point current declines decay Place, at the same welding wire is quickly progressive, electric arc is forced down, bath is examined and stays situation, it is ensured that back of weld reinforcement is uniform, works as electricity When arc will extinguish, then press striking switch and ignite electric arc, reach that clicking switch during peak value again decays by electric arc and enter rapidly Row welding, weld interval must complete within 5 seconds, so repeated multiple times untill weldering full track crack, so as to complete casting The welding of Al Alloy Super part.

The method is applied to the metal thin pieces such as welding below 1mm copper, aluminium, stainless steel.Because cast aluminium fusing point is relatively low, weldment It is again thin, just there is the possibility of burn-through using striking current, and also there is the dirt that penetrates into and can not overflow again with greasy dirt in gap, because This, welds extremely difficult.And just effectively the crack on ultra-thin aluminum casting surface can be handled using the inventive method, prolong Its long service life, it is ensured that production is normally carried out.

Embodiment

A kind of pulse blow-out method heats the welding procedure of ultra-thin aluminum casting, comprises the technical steps that：1st, using tungsten electrode argon The welding method of arc-welding, selects HS311 welding wires, must carefully clear up the aluminum oxide of sealing cap surface before welding with file, then The cracks on aluminum casting surface are toasted using oxy-acetylene flame, heating-up temperature is 18 DEG C, uniform along cracks to both sides Heating, temperature continues 7 minutes after reaching, treat that greasy dirt, moisture content overflow from cracks, close flame, wire brush is used after stopping 1 minute Crackle and its both sides are cleaned with water repeatedly, until exposing metallic luster；2nd, run-on tab is prepared, using alternating-current argon arc welder WSE-350, After the completion of butt-welding fitting cleaning, preheated using the welding gun of small size tip, tip inclination angle is 30 degree, and welding gun is quick along direction of check Uniform heating, temperature control is below 300 degree, and the black dust and oxide-film produced after grease, which overflows, to volatilize can be covered in weldering Part surface, is welded after being cleared up again using wire brush, using leftward welding, is first opened at the transversal crack on aluminum casting both sides Cracks in the middle part of aluminum casting are finally carried out tack welding by beginning welding, are first moved to during welding after run-on tab striking to be welded, are fitted When drawing high electric arc, reduce fusion penetration, the grease inside weldment is further overflowed using electric arc heat, and utilize negative electrode fragmentation The oxide-film on weldment surface is removed, stops welding, with wire brush last time cleaning face of weld, the suitable weldering of selection before welding Parameter is connect, initial current is adjusted to 20A, peak point current is adjusted to 60A, arc current is received and is adjusted to 20A, rising value is adjusted to 5S, drop-out value It is adjusted to 5S；When the 3rd, welding, weldering hard iron is maintained at 70 degree with weldment inclination angle, and welding wire is maintained at 10-15 degree, pulse blow-out with weldment angle Method is exactly ignited electric arc when pressing striking switch, and electric current rises therewith, and switch is clicked again at once in 5S, in peak point current decline Electric arc is forced down to commissure during decay, at the same welding wire is quickly progressive, electric arc is forced down, bath is examined and stays shape Condition, it is ensured that back of weld reinforcement is uniform, when electric arc will extinguish, then press striking switch and ignite electric arc, when reaching peak value again Click switch by electric arc decay and welded rapidly, weld interval must complete within 5 seconds, it is so repeated multiple times until Untill welding full track crack, so as to complete the welding of the ultra-thin part of cast aluminium alloy.

Claims

1. a kind of pulse blow-out method heats the welding procedure of ultra-thin aluminum casting, it is characterized in that comprising the technical steps that：1st, use The welding method of argon tungsten-arc welding, selects HS311 welding wires, must carefully clear up the oxidation of sealing cap surface before welding with file Then the cracks on aluminum casting surface are toasted by aluminium using oxy-acetylene flame, and heating-up temperature is 150 DEG C -200 DEG C or so, Uniformly heated along cracks to both sides, temperature continues 5-10 minutes after reaching, treat that greasy dirt, moisture content overflow from cracks, close fire Flame, is cleaned crackle and its both sides with water with wire brush after stopping 1 minute repeatedly, until exposing metallic luster；2nd, prepare run-on tab, adopt Alternating-current argon arc welder WSE-350 is used, after the completion of butt-welding fitting cleaning, is preheated using the welding gun of small size tip, tip inclination angle is 25-30 degree, welding gun is along direction of check rapid and uniform heating, and temperature control is produced below 300 degree after grease, which overflows, to volatilize Black dust and oxide-film can be covered in weldment surface, be welded after being cleared up again using wire brush, using leftward welding, first Cracks in the middle part of aluminum casting are finally carried out tack welding by welding at the transversal crack on aluminum casting both sides, first during welding Moved to after run-on tab striking to be welded, suitably draw high electric arc, reduced fusion penetration, enter the grease inside weldment using electric arc heat One step is overflowed, and removes the oxide-film on weldment surface using negative electrode fragmentation, stops welding, is cleared up with wire brush last time The suitable welding parameter of selection before face of weld, welding, 20A is adjusted to by initial current, and peak point current is adjusted to 60A, receives arc current 20A is adjusted to, rising value is adjusted to 5S, and drop-out value is adjusted to 5S；When the 3rd, welding, weldering hard iron is maintained at 65-70 degree with weldment inclination angle, welding wire with Weldment angle is maintained at 10-15 degree, and pulse blow-out method is exactly ignited electric arc when pressing striking switch, and electric current rises therewith, in 5S Switch is clicked again at once, is forced down electric arc to commissure during peak point current declines decay, while welding wire is quick It is progressive, electric arc is forced down, bath is examined and stays situation, it is ensured that back of weld reinforcement is uniform, when electric arc will extinguish, then presses Lower striking switchs the electric arc that ignites, and reaches that clicking switch during peak value again decays by electric arc and welded rapidly, welding every time must It must be completed within 5 seconds, it is so repeated multiple times untill weldering full track crack, so as to complete the ultra-thin part of whole cast aluminium alloy Welding.