Welding wire clamping mechanism adopting double-wire-feeding-wheel parallel installation structure

Abstract

The invention discloses a welding wire clamping mechanism adopting a double-wire-feeding-wheel parallel installation structure, which is characterized in that a chuck retaining shaft is arranged in a chuck sleeve, a retaining fixing frame is fixedly installed at the front end of the chuck retaining shaft, and the double-wire-feeding-wheel parallel installation structure is installed at the front end of the retaining fixing frame; a taper sleeve which makes contact with the double-wire-feeding-wheel parallel installation structure, limits the wire feeding wheels and is composed of inclined sliding blocks is arranged on the outer side of the double-wire-feeding-wheel parallel installation structure, the small end of the inner diameter of the taper sleeve is located on the rear side, and the large end of the taper sleeve is located on the front side. A welding wire guide pipe is arranged in the chuck retaining shaft; a reset spring is arranged on the chuck retaining shaft; an R-shaped arc groove is formed between the two wire feeding wheels of the double-wire-feeding-wheel parallel installation structure to be precisely attached to the outline of a welding wire or a V-shaped groove is formed to be in contact with the welding wire. The contact area is increased through the R-shaped grooves or the V-shaped grooves, welding wire deformation is prevented, the device is suitable for automatic welding equipment, high-precision welding scenes and multi-specification welding wire switching requirements, and the welding stability and efficiency are remarkably improved.

Description

Technical Field

[0001] The invention relates to a wire feeding mechanism for a welding machine. Background Art

[0002] Chinese patent CN108465913A discloses a precise push-pull wire feeding device, which uses a three-steel ball wire feeding chuck, has low cost, high reliability, can realize the push-pull action of welding wire "forward-backward-forward-backward", has the advantages of good welding quality and improved welding efficiency, etc. However, for welding wire made of softer materials such as aluminum, it is easy to be pinched by the steel balls, affecting the welding stability. Summary of the invention

[0003] The object of the present invention is to provide a welding wire clamping mechanism adopting a double wire feeding wheel parallel installation structure which will not cause clamping damage to the welding wire, effectively improves welding stability and improves welding efficiency.

[0004] The technical solution of the present invention is: A welding wire clamping mechanism adopting a double wire feeding wheel parallel installation structure is characterized in that: it includes a chuck sleeve, a chuck holding shaft is arranged in the chuck sleeve, a holding fixing frame is fixedly installed at the front end of the chuck holding shaft, and a double wire feeding wheel parallel installation structure is installed at the front end of the holding fixing frame, and a tapered sleeve composed of an inclined sliding block is arranged on the outer side of the double wire feeding wheel parallel installation structure, which contacts with the double wire feeding wheel parallel installation structure and limits the wire feeding wheels, and the small inner diameter end of the tapered sleeve is located on the rear side, and the large end of the tapered sleeve is located on the front side; a welding wire guide tube is arranged in the chuck holding shaft; a reset spring is arranged on the chuck holding shaft; an R-shaped arc groove is arranged in the middle of the two wire feeding wheels of the double wire feeding wheel parallel installation structure to accurately fit the welding wire contour or a V-shaped groove is arranged to contact the welding wire.

[0005] The wire feed roll shaft of the wire feed roll is located in the waist-shaped groove of the retaining clip.

[0006] During operation: the wire feeding wheel rotates during the wire feeding process, and the wire pushing force is used to make the wire feeding wheel slide forward. The outer diameter of the wire feeding wheel contacts the inclined slider to reduce clamping friction, and the welding wire is transported stably. When the wire feeding is paused or reversed, the welding wire drives the wire feeding wheel, and the inclined slider slides inward along the inclined surface, converting the axial displacement into radial clamping force, triggering the self-locking effect of the double wire feeding wheels to prevent the welding wire from retreating. At the same time, the retaining frame ensures the accuracy of the component movement trajectory, and the wire guide tube guides the wire path to reduce bending loss.

[0007] The present invention increases the contact area through R-shaped groove or V-shaped groove to prevent deformation of welding wire, double-wheel synchronous clamping ensures straightness, springs adapt to welding wires of different diameters, rolling friction reduces wear, and modular structure facilitates maintenance. It is suitable for automated welding equipment, high-precision welding scenarios, and switching requirements for welding wires of multiple specifications, significantly improving welding stability and efficiency. The R-shaped groove is particularly suitable for feeding aluminum welding wire, and the V-shaped groove is particularly suitable for feeding steel welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0009] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0010] Figure 2 yes Figure 1 AA view of the .

[0011] Figure 3 When using R-type groove Figure 2 A partial enlarged view of .

[0012] Figure 4 When using V-groove Figure 2 A partial enlarged view of .

[0013] Figure 5 It is a schematic diagram showing that the wire feed wheel shaft is located in the waist-shaped groove of the retaining clip. DETAILED DESCRIPTION

[0014] A welding wire clamping mechanism adopting a double wire feeding wheel parallel installation structure comprises a chuck sleeve 6 installed on a main body 1, a chuck holding shaft 5 is arranged in the chuck sleeve, a holding fixing frame 4 is fixedly installed at the front end of the chuck holding shaft, a double wire feeding wheel 2 parallel installation structure is installed at the front end of the holding fixing frame, a tapered sleeve composed of an inclined slider 3 is arranged on the outer side of the double wire feeding wheel parallel installation structure, which contacts with the double wire feeding wheel parallel installation structure and limits the wire feeding wheels, and the small inner diameter end of the tapered sleeve is located at the rear side, and the large end of the tapered sleeve is located at the front side; a welding wire guide tube 8 is arranged in the chuck holding shaft; a reset spring 7 is arranged on the chuck holding shaft; an R-shaped arc groove is arranged in the middle of the two wire feeding wheels of the double wire feeding wheel parallel installation structure (that is, a semi-circular arc groove is arranged on each of the two wire feeding wheels, and the semi-circular arc grooves on the two wire feeding wheels are connected to form a circular arc groove) to accurately fit the contour of the welding wire 13, or a V-shaped groove is arranged to contact the welding wire. The figure also includes a hole retaining ring 9, a wire feeding wheel shaft 10, a retaining clip 11, and a shaft retaining ring 12. The wire feeding wheel is clamped in the middle by two front and rear retaining clips 11, and the wire feeding wheel shaft of the wire feeding wheel is located in the waist-shaped groove of the retaining clip. When the wire feeding wheel moves forward and backward, there is radial expansion movement, that is, the up and down micro movement in the view.

[0015] During operation: the wire feeding wheel rotates during the wire feeding process, and the wire pushing force is used to make the wire feeding wheel slide forward. The outer diameter of the wire feeding wheel contacts the inclined slider to reduce clamping friction, and the welding wire is transported stably. When the wire feeding is paused or reversed, the welding wire drives the wire feeding wheel, and the inclined slider slides inward along the inclined surface, converting the axial displacement into radial clamping force, triggering the self-locking effect of the double wire feeding wheels to prevent the welding wire from retreating. At the same time, the retaining frame ensures the accuracy of the component movement trajectory, and the wire guide tube guides the wire path to reduce bending loss.

Claims

1. A welding wire clamping mechanism using a double wire feeding wheel parallel installation structure, characterized by: It includes a chuck sleeve, a chuck holding shaft is arranged in the chuck sleeve, a holding frame is fixedly installed at the front end of the chuck holding shaft, a double wire feeding wheel parallel installation structure is installed at the front end of the holding frame, a tapered sleeve composed of an inclined sliding block is arranged on the outer side of the double wire feeding wheel parallel installation structure, which contacts with the double wire feeding wheel parallel installation structure and limits the wire feeding wheels, and the small inner diameter end of the tapered sleeve is located on the rear side, and the large end of the tapered sleeve is located on the front side; a welding wire guide tube is arranged in the chuck holding shaft; a reset spring is arranged on the chuck holding shaft; an R-shaped arc groove is arranged in the middle of the two wire feeding wheels of the double wire feeding wheel parallel installation structure to accurately fit the welding wire contour or a V-shaped groove is arranged to contact the welding wire.

2. The welding wire clamping mechanism with a double wire feeding wheel parallel installation structure according to claim 1 is characterized in that: The wire feeding wheel shaft of the wire feeding wheel is located in the waist-shaped groove of the retaining clip, and when the wire feeding wheel moves back and forth, there is radial expansion movement.

3. The welding wire clamping mechanism with a double wire feeding wheel parallel installation structure according to claim 1 or 2 is characterized in that: When feeding wire, the wire feeding wheel rotates, and the wire pushing force is used to slide the wire feeding wheel forward. The outer diameter of the wire feeding wheel contacts the inclined slider to reduce the clamping friction, and the wire is transported stably. When the wire feeding is paused or reversed, the welding wire drives the wire feeding wheel, and the inclined slider slides inward along the inclined surface, converting the axial displacement into radial clamping force, triggering the self-locking effect of the double wire feeding wheels to prevent the welding wire from retreating. At the same time, the retaining frame ensures the accuracy of the component movement trajectory, and the wire guide tube guides the wire path to reduce bending loss.

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