Double eccentric wheel type push-pull pulsed wire feeding method and device

Abstract

The invention provides a double eccentric wheel type push-pull pulsed wire feeding method and a double eccentric wheel type push-pull pulsed wire feeding device, which realize the feeding and retracting of a welding wire, and achieve the effect of pulsed feeding by more feeding and less retracting of the welding wire. The method is characterized in that: a motor 14 drives an eccentric shaft 8 to rotate; the eccentric shaft 8 is provided with two eccentric wheels with different eccentricities and the same eccentric direction; when the eccentric shaft 8 drives a feed chuck 10 and a retraction chuck 3 to move forwards, the feed chuck 10 drives the welding wire 1 to feed forwards, and the retraction chuck 3 and the welding wire 1 generate sliding friction; and when the eccentric shaft 8 drives the feed chuck 10 and the retraction chuck 3 to move backwards, the feed chuck 10 does not clamp the welding wire 1, and the retraction chuck 3 and the welding wire 1 drive the welding wire 1 to retract by virtue of a static frictional force generated by a pressing force of a spring 4. A feed distance and a retraction distance of the welding wire 1 are determined by the eccentricity of the eccentric wheel. The device has the characteristics of reliable action, high reciprocating frequency, simple and light structure, less vibration and low cost.

Description

Technical field [0001] The invention belongs to welding equipment, and particularly relates to a wire feeding device in carbon dioxide and argon gas shielded molten electrode arc welding. Background technique [0002] Gas metal arc welding is an advanced welding method. It has the advantages of good welding quality, high efficiency, and low cost. However, its short-circuit transfer characteristics make this method have poor droplet transfer regularity, large welding spatter, and weld seam. Poor forming. The current waveform control method (such as STT method) has greatly reduced welding spatter, but it cannot eliminate welding spatter fundamentally in the full current range. On the other hand, there are also current methods of changing the wire feeding method and replacing the traditional wire feeding with pulsed wire feeding. Constant speed wire feeding. Chinese patent 00122314.3 provides a better pulsating wire feeding scheme, and the working reliability is greatly improved. ...

AI Technical Summary

Problems solved by technology

[0003] US7102099 and EP1901874 respectively provide the pulsating movement mode of feeding and withdrawing the welding wire, but the mechanism required is very complicated and cumbersome, it will generate a lot of vibration when working, the mechanism is unreliable and wears quickly

Too bulky and bulky mechanism is also difficult to hold in the hands of workers for semi-automatic welding operations, thus greatly limiting the scope of its use

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