Welding wire buffer device, welding robot and welding system

Abstract

The invention provides a welding wire buffer device. The welding wire buffer device is arranged between a first wire feeding part and a second wire feeding part. The first wire feeding part conveys awelding wire to the buffer device, and the second wire feeding part conveys the welding wire to a neck part of a welding gun for welding. One end of an inner wire feeding pipe is fixedly connected with the first wire feeding part, and the other end of the inner wire feeding pipe is a free end and moves along with the welding wire in the axial direction to achieve a buffering function. According tothe welding wire buffer device, a buffer space is provided for the welding wire, the probability that the welding wire gets stuck due to a large curvature, caused by a large back-pulling quantity ofthe welding wire, of a wire feeding pipe is lowered, protection pipes with small diameters reduce the weight of the wire feeding pipe, and the gravity of the welding wire and the inner and outer protection pipes of the welding wire is further reduced, so that the friction force between the welding wire and the inner and outer protection pipes is reduced, and the precision of the welding wire buffer device is improved. According to a welding robot and welding system using the welding wire buffer device, the structure of a welding device is simplified, the manufacturing cost is reduced, the production cycle is shortened, and the economical performance and practicability of the welding robot and the welding system of the welding robot are improved.

Description

technical field [0001] The invention relates to devices in the field of welding, in particular to a welding wire buffer device, a welding robot and a welding system using the welding wire buffer device. Background technique [0002] With the development of welding technology, especially with the development of welding automation, gas metal arc welding with high welding efficiency and good weld quality has been more and more widely used. Due to the shortcomings of the short-circuit transition used in gas metal arc welding, such as large welding spatter, it is found through research that two wire feeders, one in front and one in the back, can be used to synchronously drive the welding wire forward and backward periodically to achieve low spatter mode. state. [0003] Chinese patent CN100509240C (disclosure date: July 8, 2009) discloses a buffer device for welding wire, including two wire feeders, welding core and welding wire guiding hose. The cross-section or inner diameter...

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Problems solved by technology

[0004] Due to the shape and size of the wire guide hose and other factors in the above solution, the trajectory of the welding core and welding wire is limited. Therefore, when the welding wire is retracted a lot, the wire guide hose will be in a bending state with a large radius of curvature. At this time, the welding wire It will resist the side wall of the welding wire guide hose and cause the welding core to move slowly or even not move. The specific performance is that the welding wire is not withdrawn in time or even not withdrawn, which makes the wire feeding response slow, which seriously affects the welding efficiency and weld formation quality. Therefore, it is urgent to develop a fast-response welding wire buffer device

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