CN85100691A - The sliding pliers pulsating solder wire feeder of push-pull short circuit transition welding usefulness - Google Patents

Abstract

Be used for various arc weldings, particularly CO ₂Gas shielded arc welding.Clamp is that the center is made up of two levers (2,3) with circular shaft (1).About the clamp, about divide resultant motion all to determine by cam group (8～12).Clamp is to clamp perpendicular to the direction of welding wire (10) center line or to unclamp welding wire.Clamp clamps welding wire in advance, is being with welding wire to advance together, retreats together.Behind the slow astern set a distance, welding wire is loosened in the clamp stop motion, then, goes back to the original starting position voluntarily.Characteristics of the present invention are wire feed step pitch and wire-feeder resistance, and accidentalia such as welding wire surface state are irrelevant.Between clamp and welding wire in the welding wire motion process no relative local the slip.

Description

The sliding pliers pulsating solder wire feeder of push-pull short circuit transition welding usefulness

The present invention is used for various electric arcs automatic and semi-automatic welding, especially CO ₂In the gas shielded arc welding.

In " push-pull short circuit transition welding method and pulsating solder wire feeder thereof " patent specification, discussed in detail to improving CO ₂The welding technological properties best bet is to make its molten drop carry out transition in the mode of push-and-pull short circuit.This transition request welding wire is made periodic pulsating motion.Divide in each cycle advance, retreat, left alone without help three stage, wherein most time is left alone without help.The various pulsating solder wire feeders of abroad studying widely (1) can't accomplish that all welding wire promptly retreats in cycle droplet transfer at present.Only in above-mentioned patent, proposed to utilize " inclined-plane-wedge " chuck of in general pulsating solder wire feeder, using always to accomplish this point.Used " wedge " is ball or roller in this patent.Chuck can produce the clamping force to welding wire when a direction motion, drive welding wire and move together.On another direction, welding wire is unclamped, can be on welding wire art skating.The mode of this drive welding wire motion all can make actual wire feed distance change with the wire-feeder resistance size as other all " inclined-plane-wedges ".Resistance is big more, and chuck will advance some more, and " falling into " goes in the welding wire darker, could promote welding wire and advance, actual wire feed step pitch is reduced, and the stability of welding process is affected, and welding wire surface is scratched, plating exfoliation, conduction are chewed and flexible pipe stops up, and resistance increases or the like.This problem be not resolved (2) in pulsating solder wire feeder.

The objective of the invention is to develop a kind of like this pulsating solder wire feeder that is used for push-pull short circuit transition welding, welding wire periodically advances, retreats this pulsating solder wire feeder except that guaranteeing to finish accurately and reliably, left alone without help action, its wire feed step pitch and resistance are had nothing to do.In the welding wire motion process, local relative slip does not take place between chuck and welding wire, make the wire feed process stabilization like this.

Figure 1 shows that a kind of like this wire-feed motor, is that a clamp is formed by two levers (2,3) in the center with circular shaft (1).Each lever one end all has two rollers.Lever (2) has roller (4,5), lever (3) has roller (6,7), roller (4,6) motion in cam groove (8,9) respectively, make clamp separately or draw close, thereby clamp or unclamp welding wire (10), roller (5,7) is gone up at cam (11,12) respectively and is rolled, and whole clamp is slided up and down along axle (1).By the clamp motor program of cam group decision as shown in Figure 2, curve A is represented the transverse movement of clamp, promptly to the clamping of welding wire or unclamp.Curve B is represented the lengthwise movement of clamp, i.e. sliding up and down along axle (1).t ₁Preceding clamp has only transverse movement, and welding wire is clamped, and does not move.t ₁To t ₂During this time, clamp moves downward, and welding wire also is being held together and is sending to downwards.The distance of clamp motion is welding wire advance amount δ just _ft ₂To t ₃Clamp up moves during this time, and welding wire is also followed up, the amount of the retreating δ that this segment distance of returning is exactly a welding wire _bt ₃The later clamp stop that moves up and down, t ₄In time, be totally released welding wire.t ₅Clamp continues again to rise later on, but therefore welding wire keeps motionless owing to released, and and then clamp does not retreat.Process repeats later on.

Like this, although the stroke that clamp moves up and down is identical, because welding wire is released for some time in the fallback procedures, so the stroke that welding wire moves up and down is different, it is many to advance, and retreats few.Actual wire feed step pitch δ is welding wire advance amount δ _fDeduct its amount of retreating δ _b

When chuck advanced to the end, welding wire still had been held, so that welding wire can not continue preshoot is excessive.Chuck is return δ _bAfter the distance, stop gets off, and welding wire also still is being held.So it is excessive also can not to continue backlash.Wait until welding wire real left alone without help surely unclamp after, chuck just retreats again, gets back to original homeposition.Such program makes the welding wire motion constant accurately.

In this wire-feed motor, the chuck of clamping welding wire is to be toward or away from welding wire with the direction perpendicular to the welding wire center line when the welding wire transfixion.The motion of welding wire is to carry out under the condition that fully clamps.The wire feed step pitch determined by the shape of cam fully or regulated, and with the wire-feeder resistance size, accidentalia such as welding wire surface state are irrelevant.

In whole wire feed process, clamp moves just as an integral body with welding wire, does not have the sort of local slip the in general roller or the steel ball clamping each other, peels off with regard to the wearing and tearing that significantly reduced welding wire like this.Clamp has bigger contact area to welding wire, and pressure distribution is even, to sending softer welding wire advantageous particularly.

List of references: 1 В А Л Е Б Е Д Е В " А В Т О М А Т И Ч Е С К А Я С В А Р К А ", 83 № 7

2·В·А·ЛЕБЕДЕВ《АВТОМАТИЧЕСКАЯСВАРКА》84·№·10

Claims (1)

1. Be used for various arc weldings, particularly CO ₂The wire-feed motor of gas shielded arc welding, welding wire is made back and forth excitation pulse by drive.It is characterized in that:

   A, clamp are that the center is made up of two levers (2,3) with circular shaft (1), its along circular shaft up and down move and about clamp or loosen moving of welding wire and can control respectively.

   The program of b, clamp and welding wire motion is: clamp clamps welding wire in advance, is being with welding wire to advance together, and another retreats then.After retreating into certain distance, welding wire is loosened in the motion of clamp stop, goes back to the original starting position voluntarily then.

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