CN216607575U - Low-resistance welding gun wire feeding device - Google Patents

Abstract

A low resistance welding torch wire feeder comprising: the nozzle assembly, the welding gun diameter, the gun body assembly and the cable assembly are sequentially connected; the welding gun diameter comprises two straight cylinder diameters and a flexible section for connecting the two straight cylinder diameters, a steel ball retainer is arranged in the welding gun diameter and comprises a flexible steel ball retainer in the flexible section and a rigid steel ball retainer in the straight cylinder diameter, the flexible steel ball retainer can bend along with the flexible section, a ball is arranged in the steel ball retainer, and the ball and a welding wire generate rolling friction. According to the device, the steel ball retainer is arranged in the diameter of the welding gun, so that the sliding friction with larger friction force between the welding wire and the inner wall of the diameter of the welding gun is converted into the rolling friction with smaller friction force between the welding wire and the steel ball in the wire feeding process, the wire feeding resistance is reduced, and the wire feeding process is more stable.

Description

Low-resistance welding gun wire feeding device

Technical Field

The utility model relates to the technical field of welding, in particular to a low-resistance welding gun wire feeding device.

Background

The welding gun is a part for executing welding operation in the welding process, is shaped like a gun, is provided with a nozzle at the front end, sprays high-temperature flame as a heat source, is flexible to use, convenient and quick, and is simple in process, the welding gun utilizes the high current of the welding machine, heat generated by high voltage is gathered at the welding gun terminal, the welding wire is melted, the melted welding wire permeates to a part needing to be welded, and after cooling, the welded objects are firmly connected into a whole.

In actual automatic weld process, in order to increase the welding area, need use the elbow formula welder footpath usually, among the prior art, be welding wire and welder footpath inner wall direct contact usually, when the welding wire passed in the footpath, can produce sliding friction with the inner wall in welder footpath, the driven resistance of welding wire has been increased, and in the friction process of welding wire and welder footpath inner wall, the powder that produces after the welding wire wearing and tearing can adsorb on welder footpath inner wall, through the accumulation of a period of time, will cause the jam to the welder footpath, influence the stability of sending a wire.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present application provides a low resistance welding gun wire feeder. According to the device, the steel ball retainer is arranged in the diameter of the welding gun, so that the sliding friction with larger friction force between the welding wire and the inner wall of the diameter of the welding gun is converted into the rolling friction with smaller friction force between the welding wire and the steel ball in the wire feeding process, the wire feeding resistance is reduced, and the wire feeding process is more stable.

The utility model is realized by the following technical scheme:

a low resistance welding torch wire feeder comprising: the welding gun comprises a nozzle assembly, a welding gun diameter, a gun body assembly and a cable assembly, wherein the nozzle assembly, the welding gun diameter, the gun body assembly and the cable assembly are sequentially connected; the welding gun diameter comprises straight cylinder diameters formed at two ends and a flexible section for connecting the two straight cylinder diameters; the straight cylinder diameter is more convenient to be connected with other components of the welding gun, and during work, after the welding wire enters the welding gun diameter, the straight cylinder diameter can serve as a buffering part, so that the phenomenon that the pressure born by the flexible section from the welding wire is too large, and the bending angle changes in the working process of the flexible section is avoided. A steel ball retainer is arranged in the diameter of the welding gun and comprises a flexible steel ball retainer in a flexible section, the flexible steel ball retainer can be bent along with the flexible section, a ball is arranged in the steel ball retainer, and the ball and a welding wire are subjected to rolling friction. The steel ball retainer comprises a flexible steel ball retainer in a flexible section and a rigid steel ball retainer in a straight cylinder diameter, wherein the rigid steel ball retainer is made of common rigid materials and is in a straight cylinder shape and cannot be bent. The rigid steel ball retainer has the same length as the straight cylinder diameter, and when the rigid steel ball retainer is arranged in the straight cylinder diameter, the outer wall of the rigid steel ball retainer can be completely attached to the inner wall of the straight cylinder diameter; annular limiting bulges are formed at two ends of the straight cylinder diameter and used for limiting the rigid steel ball retainer in the straight cylinder diameter from sliding relative to the straight cylinder diameter; the flexible steel ball retainer in the flexible section is made of flexible materials and is cylindrical in shape during working. The flexible steel ball retainer is arranged in the flexible section and can change different bending angles along with the flexible section, balls are also arranged in the flexible steel ball retainer, the inner diameter and the outer diameter of the flexible steel ball retainer are the same as those of the rigid steel ball retainer, and after the flexible section is connected with the straight cylinder diameter, the end face of the flexible steel ball retainer can be mutually abutted with the end face of the rigid steel ball retainer to form a channel with the same inner diameter.

Furthermore, the flexible steel ball retainer is a cylindrical flexible rubber plate and is attached to the inner wall of the flexible section. The flexible steel ball retainer is formed by rolling a planar flexible rubber plate into a cylinder shape, and the longitudinal cross section of the flexible rubber plate is trapezoidal. The flexible rubber plate needs to be curled into a cylindrical shape after being processed to be installed in the flexible section, when the flexible rubber plate is bent, the outer side surface is pulled towards the center of the side surface, the outer side surface can contract towards the center, the length of the outer side surface is shortened, namely the circumference after bending is shorter than the length of the outer side surface before bending, the inner side surface is stressed less, and the length change is not obvious. Therefore, the cross section of the flexible rubber plate is trapezoidal, so that after the flexible rubber plate is bent into a cylinder shape, two side surfaces can be better butted with each other, and a gap is small. After the flexible rubber plate is bent into a cylindrical shape, the joint of the side surfaces is bonded by using an adhesive. The length of the flexible rubber plate is the same as that of the flexible section, and the flexible steel ball retainer and the rigid steel ball retainer can be better attached when the flexible section is connected with the straight cylinder in length, so that the welding wire can pass through more stably.

Further, an arc-shaped groove is formed in the flexible rubber plate, the diameter of the arc-shaped groove is larger than that of the ball, and the ball can roll in the arc-shaped groove. The flexible rubber plate is provided with an arc-shaped groove for containing the balls, the arc-shaped groove is only located on the inner side of the flexible rubber plate and is not communicated with the outer side of the flexible rubber plate, the position of the arc-shaped groove is determined by the requirement of the balls, the diameter of the arc-shaped groove is larger than that of the balls, and the balls can freely roll in the groove after being installed in the arc-shaped groove. The ball is a part which is in direct contact with the welding wire in the diameter of the welding gun, and the ball reduces the resistance received in the process of conveying the welding wire by rolling friction with the welding wire, so that the ball is indispensable for free rolling.

Further, the arc-shaped groove forms an opening through which the ball protrudes, and the diameter of the opening is smaller than that of the ball. A part of the ball protrudes out of the arc-shaped groove, the maximum protruding part is smaller than half of the volume of the ball, the minimum protruding part is larger than one fourth of the volume of the ball, the ball protrudes out of the inner wall of the steel ball retainer enough, the welding wire is prevented from rubbing the steel ball retainer after entering the steel ball retainer, and the steel ball retainer is prevented from being damaged or abraded. The diameter of the opening of the arc-shaped groove is smaller than that of the ball, so that the ball is prevented from sliding out of the groove when rolling to block a welding gun diameter channel.

Further, each ball corresponds to one arc-shaped groove, and a gap is formed between every two adjacent arc-shaped grooves. The flexible section is usually in a bending state during working, the corresponding flexible steel ball retainer also needs to be bent, when the flexible steel ball retainer is bent, if the distance between the balls is too close, friction can occur between the steel balls during bending, unnecessary loss is generated, and if the distance between the balls is too large, a welding wire is easy to rub against the inner wall of the steel ball retainer when passing through, fragments are generated, and the rolling of the steel balls is influenced. Therefore, the normal operation is affected by too large and too small ball gaps. Bending mainly occurs in the axial direction, so that collision cannot occur between the balls, the distance between every two adjacent arc-shaped grooves in the axial direction is required to be larger than or equal to the diameter of the balls, and the distance cannot be too large in order to ensure the normal passing of a welding wire, so that the distance between the arc-shaped grooves in the axial direction is set to be 1 to 1.5 times of the diameter of a steel ball.

Further, the balls are uniformly arranged in the inner circumference of the flexible steel ball retainer, and the axial intervals are different. Flexible section can be to buckling, flexible steel ball keeps ware and will follow flexible section and buckle, keep ware when buckling to any angle in order to guarantee flexible steel ball, the welding wire can both fully contact with the ball, keep the ware at flexible steel ball, ball circumference is evenly arranged, the quantity is 4 at least, can set up 4, 5, 6 etc., the quantity of arc recess in corresponding flexible steel ball keeps the ware also increases thereupon, keep the ware inner wall to take place the friction in order to guarantee the welding wire can not keep the ware with the steel ball, the welding wire that uses is more thin, the quantity that ball circumference set up is more. In the axial direction, bending mainly occurs in the middle part of the flexible section, and the main stress part of the flexible steel ball retainer is also at the bending part, so that more balls are arranged in the middle part of the flexible steel ball retainer to resist stress, and the two ends of the flexible steel ball retainer are usually bent less, so that the gap between the balls can be properly increased. Therefore, the clearance distance between the balls at the two ends of the flexible steel ball retainer in the axial direction is set to be 1.4 to 1.5 times of the diameter length of the balls, and the clearance distance between the balls at the middle part of the flexible steel ball retainer in the axial direction is 1.0 to 1.2 times of the diameter length of the balls.

Furthermore, the nozzle assembly comprises a conductive nozzle, a conductive nozzle seat, an insulator and a nozzle, wherein the conductive nozzle, the conductive nozzle seat and the insulator are sequentially in threaded connection with the front gun diameter, and the conductive nozzle seat are made of materials with good conductivity. The contact tip belongs to the easy-to-wear part, for guaranteeing contact tip's life and welded quality, contact tip's aperture will keep unanimous with the welding wire diameter, the too big or undersize in contact tip aperture can all influence welding process, contact tip and conductive tip seat are connected through the screw thread, it is more convenient to change contact tip, the insulator is connected to the other end of conductive tip seat, the insulator adopts ceramic construction, it is insulating and high temperature resistant, the insulator passes through the screw thread and is connected with welder footpath, the insulator can block the electric conduction well, prevent that rifle footpath and nozzle are electrified. The nozzle is connected with the front gun diameter through threads and used for conveying protective gas to a welding position to prevent the end of a welding wire and electric arc from being equal to air contact. The nozzle bore diameter is related to the current magnitude.

Furthermore, the gun body assembly comprises a gun shell, a switch, a holding rod, a connecting bulge and a connecting hole, the switch is installed at the bottom of the gun shell and used for controlling and stopping the wire discharging, and the switch is connected with the holding rod so as to be more convenient to hold and operate; the connecting bulge is positioned at the front end of the gun shell, the connecting hole is positioned at the rear end of the gun shell, the connecting hole protrudes out of the gun shell, connecting threads are arranged on the outer side of the connecting hole, and a wire feeding interface, a control wire interface and a gas feeding interface are arranged in the connecting hole; the control line interface is connected with the switch.

Furthermore, a welding wire through hole is formed in the connecting protrusion, the hole axis of the welding wire through hole is overlapped with the hole axis of the wire feeding interface, the welding wire can directly penetrate through the gun body assembly to enter the diameter of the welding gun after penetrating through the wire feeding pipe, and excessive friction of the welding wire in the gun body assembly is prevented.

Furthermore, the cable assembly comprises a spring sheath, a control wire, a wire feeding pipe and an air feeding pipe, wherein the control wire, the wire feeding pipe and the air feeding pipe are provided with bulges with different lengths at the port of the cable assembly and respectively correspond to a control wire interface, a wire feeding interface and an air feeding interface in the gun shell connecting hole. The end part of the cable assembly is provided with a locking cap, and after each pipeline in the cable assembly is connected with the interface in the gun shell connecting hole, the locking cap is screwed into the gun shell connecting hole to fix the cable assembly and the gun shell. The spring sheath is arranged at the end part of the cable assembly, the connection part of the gun body and the cable assembly is a part which is easy to bend, and the spring sheath is arranged at the connection part, so that the cable assembly can be protected.

Drawings

FIG. 1 is a schematic diagram illustrating the structure of an exemplary embodiment of the present invention;

FIG. 2 is a schematic connection diagram illustrating an exemplary embodiment of the present invention;

FIG. 3 is a side view illustrating an exemplary embodiment of a flexible rubber sheet in the present invention;

FIG. 4 is a cross-sectional view illustrating one exemplary embodiment of a flexible steel ball retainer in the present invention;

FIG. 5 is a cut-away view of an exemplary embodiment of the rear barrel of the present invention;

FIG. 6 is a schematic diagram illustrating the connection of an exemplary embodiment of a nozzle assembly according to the present invention;

FIG. 7 is a schematic diagram illustrating an exemplary embodiment of a cable assembly according to the present invention.

Reference numerals:

1. nozzle component, 11, nozzle, 12, contact tip, 13, first connecting thread, 14, contact tip seat, 15, insulator, 16, second connecting thread, 17, third connecting thread, 2, welding gun diameter, 21, front gun diameter, 22, bending gun diameter, 221, ball, 222, arc-shaped groove, 223, flexible rubber plate, 224, inner side surface, 225, outer side surface, 226, flexible ball retainer, 23, rear gun diameter, 231, limit ring, 232, fourth connecting thread, 233, rear gun diameter, 234, rigid ball retainer, 3, gun body component 31, connecting projection, 32, gun shell, 33, connecting hole, 34, switch, 4, cable assembly, 41, spring sheath, 42, wire feed tube, 43, air feed tube, 44. control wire, 45, locking cap.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.

It should be noted that the terms of orientation such as left, right, up, down, front and back in the embodiments of the present invention are only relative concepts or are referred to a normal use state of the product, i.e., a traveling direction of the product, and should not be considered as limiting.

In addition, the dynamic terms such as "relative movement" mentioned in the embodiments of the present invention include not only a positional change but also a movement in which a state changes without a relative change in position such as rotation or rolling.

Finally, it is noted that when an element is referred to as being "on" or "disposed" to another element, it can be on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

As shown in fig. 1 to 7, a low resistance welding gun wire feeder includes: the welding gun comprises a nozzle component 1, a welding gun diameter component 3, a gun body component 3 and a cable assembly 4, wherein the nozzle component 1, the welding gun diameter component 2, the gun body component 3 and the cable assembly 4 are sequentially connected; the welding gun diameter 2 comprises straight cylinder diameters formed at two ends and a flexible section 22 for connecting the two straight cylinder diameters; the straight cylinder diameter is more convenient to be connected with other components of the welding gun, and during work, after the welding wire enters the welding gun diameter 2, the straight cylinder diameter can be used as a buffering part, so that the phenomenon that the bending angle of the flexible section 22 is changed in the working process due to the fact that the pressure borne by the flexible section 22 and coming from the welding wire is too large is avoided. A steel ball retainer is arranged in the welding gun diameter 2 and comprises a flexible steel ball retainer 226 in a flexible section, the flexible steel ball retainer 226 can bend along with the flexible section 22, balls are arranged in the steel ball retainer, and the balls and a welding wire generate rolling friction. It should be noted that the steel ball retainer comprises a flexible steel ball retainer 226 in a flexible section and a rigid steel ball retainer 234 in a straight cylinder diameter, the rigid steel ball retainer 234 is made of common rigid materials, is in a straight cylinder shape and cannot be bent, the inner wall of the rigid steel ball retainer 234 adopted by the utility model is uniformly provided with rolling balls 221 in the circumferential direction, the balls 221 are uniformly arranged along the straight cylinder diameter direction, and the balls 221 uniformly arranged in the circumferential direction and the axial direction enable the stress of the steel ball retainer 234 to be more uniform, so that the steel ball retainer 234 is not easy to damage. The rigid steel ball retainer 234 in the rear gun diameter 23 has the same length as the rear gun diameter 23, and when the rigid steel ball retainer 234 is installed in the rear gun diameter 23, the outer wall of the rigid steel ball retainer 234 can be completely attached to the inner wall of the rear gun diameter 23; annular limiting bulges 231 are formed at two ends of the rear gun diameter 23 and are used for limiting the rigid steel ball retainer 234 in the rear gun diameter 23 from sliding relative to the rear gun diameter 23, and the front gun diameter 21 and the rear gun diameter 23 are arranged identically; the flexible ball retainer 226 in the flexible segment 22 is made of flexible material and is cylindrical in shape during operation. The flexible steel ball retainer 226 is arranged in the flexible section 22 and can change different bending angles along with the flexible section 22, the ball 221 is also arranged in the flexible steel ball retainer 226, the inner diameter and the outer diameter of the flexible steel ball retainer 223 are the same as those of the rigid steel ball retainer 234, and after the flexible section 22 is connected with the straight cylinder diameter, the end surface of the flexible steel ball retainer 226 can be mutually abutted to the end surface of the rigid steel ball retainer 234 to form a channel with the same inner diameter. It should be noted that the straight cylindrical diameter may not be used and the flexible segment 22 can be directly connected to the nozzle assembly 1 and the gun body assembly 3.

Preferably, connecting threads are arranged at two ends of the flexible section 22, a flexible steel ball retainer 223 is installed in the flexible section 22, one end of the flexible section 22 is connected with the nozzle assembly 1, the other end of the flexible section is connected with the gun body assembly 3, after connection, the end axis of the flexible steel ball retainer 223 and the axis of the connecting protrusion 31 at the front end of the gun shell 32 are on the same straight line, and after the welding wire passes through the gun body assembly 3, the diameter of the welding wire enters the flexible steel ball retainer 223.

Preferably, the flexible steel ball retainer 226 is a cylindrical flexible rubber plate 223, which is attached to the inner wall of the flexible segment. The flexible rubber sheet 223, in which the flexible steel ball holder 226 is a plane, is formed by rolling into a cylindrical shape, and the longitudinal cross section of the flexible rubber sheet 223 is trapezoidal. The flexible rubber plate needs to be curled into a cylindrical shape after being processed and then can be installed in the flexible section 22, when the flexible rubber plate 223 is bent, the outer side surface 225 is subjected to tensile force stretching towards the center of the side surface, the outer side surface 225 can contract towards the center, the length of the outer side surface 225 is shortened, namely the circumference after bending is shorter than that of the outer side surface 225 before bending, the inner side surface 224 is subjected to smaller force, and the length change is not obvious. Therefore, the trapezoidal cross section of the flexible rubber plate 223 enables the two sides of the flexible rubber plate 223 to be better butted and have a smaller gap after the flexible rubber plate 223 is bent into a cylinder shape. After the flexible rubber sheet 223 is bent into a cylindrical shape, the side surface contact portions are bonded with an adhesive. The length of the flexible rubber plate 223 is the same as that of the flexible section 22, and the same length can ensure that the flexible steel ball retainer 226 and the rigid steel ball retainer 234 can be better jointed when the flexible section 22 is connected with the straight cylinder diameter, so that the welding wire can pass through more stably.

Preferably, the flexible rubber sheet 223 is provided with an arc-shaped groove 222, the diameter of the arc-shaped groove 222 is larger than that of the ball 221, and the ball 221 can roll in the arc-shaped groove 222. The flexible rubber plate 223 is provided with an arc-shaped groove 222 for accommodating the ball 221, the arc-shaped groove 222 is only located on the inner side surface 224 of the flexible rubber plate 223 and is not communicated with the outer side surface 225 of the flexible rubber plate 223, the position of the arc-shaped groove 222 is determined by the requirement of the ball 221, the diameter of the arc-shaped groove 222 is larger than that of the ball 221, and the ball 221 can freely roll in the arc-shaped groove 222 after being installed in the arc-shaped groove 222. Since the ball 221 is a part in the welding torch 2 that directly contacts the welding wire, and the ball 221 reduces resistance to the welding wire during conveyance by rolling friction with the welding wire, it is essential that the ball 221 can freely roll.

Preferably, the arc-shaped groove 222 forms an opening through which the ball 221 protrudes, and the diameter of the opening is smaller than that of the ball 221. A part of the ball 221 protrudes out of the arc-shaped groove 222, the protruding part is less than half of the volume of the ball at the maximum and more than one fourth of the volume of the ball 221 at the minimum, and the ball 221 protrudes out of the inner wall of the ball retainer 226 enough to ensure that the welding wire does not rub against the ball retainer 226 after entering the ball retainer 226, so that the ball retainer 226 is prevented from being damaged or the welding wire is prevented from being worn. The diameter of the opening of the arc-shaped groove 222 is smaller than that of the ball 221, so that the ball 221 is prevented from sliding out of the groove when rolling, and the welding gun diameter 2 channel is prevented from being blocked.

In one embodiment, the diameter of the ball 221 is 3mm, the diameter of the arc-shaped groove 222 is 4mm, the diameter of the opening of the groove is 2.5mm, and the ball 221 can roll freely in the arc-shaped groove 222 without falling out of the arc-shaped groove 222.

Preferably, each ball 221 corresponds to one arc-shaped groove 222, and a gap is formed between adjacent arc-shaped grooves 222. When the flexible segment 22 works, the flexible segment is usually in a bent state, and the corresponding flexible steel ball retainer 226 also needs to be bent, when the flexible segment is bent, if the distance between the balls 221 is too close, friction occurs between the steel balls 221 during bending, so that unnecessary loss is generated, and if the distance between the balls 221 is too large, when a welding wire passes through, the welding wire is easy to rub against the inner wall of the steel ball retainer 226, so that fragments are generated, and the rolling of the steel balls 221 is influenced. Therefore, the balls 221 are too far apart from each other to affect the normal operation. Bending mainly occurs in the axial direction, so as to ensure that the balls 221 do not collide with each other, the distance between every two adjacent arc-shaped grooves 222 in the axial direction needs to be larger than or equal to the diameter of the balls 221, and in order to ensure the normal passing of the welding wire, the distance cannot be too large, so that the distance between the arc-shaped grooves in the axial direction is set to be 1 to 1.5 times of the diameter of the steel ball.

In one embodiment, the steel balls 221 are 3mm in diameter, the gap between the axially curved recesses in the flexible ball retainer 226 is 4mm, and the radial 2 of the welding gun is bent by 45 °, so that no friction occurs between the steel balls.

Preferably, the balls 221 are evenly arranged circumferentially within the flexible ball retainer 226 with different axial spacing. The flexible section 22 can be to buckling, flexible steel ball retainer 226 will follow flexible section 22 and buckle, when buckling to any angle in order to guarantee flexible steel ball retainer 226, the welding wire can both fully contact with ball 221, in flexible steel ball retainer 226, ball 221 circumference evenly arranged, the quantity is 4 at least, can set up 4, 5, 6 etc., the quantity of the arc recess in corresponding flexible steel ball retainer 226 also increases thereupon, in order to guarantee that the welding wire can not take place the friction with the steel ball retainer inner wall, the welding wire that uses is thinner, the quantity that ball 221 circumference set up is more. In the axial direction, the bending mainly occurs in the middle portion of the flexible segment 22, and the main force-bearing portion of the flexible ball retainer 226 is also at the bending portion, so that more balls 221 should be disposed in the middle portion of the flexible ball retainer 226 to resist the force, and the two ends of the flexible ball retainer 226 are usually bent less, so as to increase the gap between the balls properly. Therefore, the clearance distance between the balls 221 at both ends of the flexible ball retainer 226 is set to be 1.4 to 1.5 times the diameter length of the balls 221 in the axial direction, and the clearance distance between the balls 221 at the middle portion of the remaining flexible ball retainer 226 is set to be 1.0 to 1.2 times the diameter length of the balls 221 in the axial direction.

In one embodiment, the length of the flexible segment 22 is 200mm, the diameter of the ball 221 is 3mm, 5 balls 221 are axially arranged in the flexible ball retainer 226, the distance from the two ends of the flexible ball retainer 226 to the end is 40mm, the gap between the balls 221 is 3mm, the distance between the balls is 4mm in the middle of the flexible ball retainer within 160 mm.

Preferably, the nozzle assembly 1 includes a contact tip 12, a contact tip seat 14, an insulator 15, and a nozzle 11, the contact tip 12, the contact tip seat 14, the insulator 15, and the front gun diameter 21 are sequentially connected by threads, and the contact tip 12 and the contact tip seat 14 are made of materials with good electrical conductivity. The contact tip 12 belongs to a part easy to wear, in order to guarantee the service life and welding quality of the contact tip 12, the aperture of the contact tip 12 is consistent with the diameter of a welding wire, the welding process can be influenced when the aperture of the contact tip 12 is too large or too small, the contact tip 12 is connected with the contact tip seat 14 through threads, the contact tip 12 is more convenient to replace, the other end of the contact tip seat 14 is connected with an insulator 15, the insulator 15 is of a ceramic structure, the insulator is insulating and high-temperature resistant, the insulator 15 is connected with a front gun diameter 21 through threads, the insulator can well block electric conduction, and the gun diameter and the nozzle 11 are prevented from being electrified. The nozzle 11 is connected with the front gun diameter 21 through threads, and the nozzle 11 is used for supplying protective gas to a welding position to prevent the end of a welding wire and an electric arc from being in contact with air. The diameter of the inner bore of the nozzle 12 is related to the magnitude of the current.

In one embodiment, the wire diameter is 1.4mm, the tip 12 aperture is also 1.4mm, and the threads are M6 × 25 mm; the current is 150A, the nozzle 11 is cylindrical, and the caliber is 16 mm.

Preferably, the gun body assembly comprises a gun shell 32, a switch 34, a holding rod, a connecting protrusion 31 and a connecting hole 33, the switch 34 is installed at the bottom of the gun shell and used for controlling and stopping the thread discharging, and the switch 33 is connected with the holding rod to facilitate the holding and the operation; the connecting protrusion 31 is positioned at the front end of the gun shell 32, the connecting hole 33 is positioned at the rear end of the gun shell 21, the connecting hole 33 protrudes out of the gun shell 21, the outer side of the connecting hole 33 is provided with connecting threads, and a wire feeding interface, a control wire interface and a gas feeding interface are arranged in the connecting hole; the control line interface is connected to the switch 34.

As shown in fig. 7, the cable assembly 4 includes a control line 44, a wire feeding pipe 42 and a gas feeding pipe 43, wherein the control line 44, the wire feeding pipe 42 and the gas feeding pipe 43 are provided with protrusions with different lengths at ports of the cable assembly 4, and correspond to a control line interface, a wire feeding interface and a gas feeding interface in a rear connecting hole of the gun housing 3, respectively. The end of the cable assembly 4 is provided with a locking cap 45, and after each pipeline in the cable assembly 4 is connected with the interface in the gun case 3 rear connecting hole 33, the locking cap 45 is screwed into the gun case rear connecting hole 33 to fix the cable assembly 4 and the connecting hole 33.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. A low resistance weld gun wire feeder comprising: the welding gun comprises a nozzle assembly, a welding gun diameter, a gun body assembly and a cable assembly, wherein the nozzle assembly, the welding gun diameter, the gun body assembly and the cable assembly are sequentially connected; the welding gun diameter comprises two straight cylinder diameters and is connected with the two straight cylinder diameters, a steel ball retainer is arranged in the welding gun diameter, a ball is mounted in the steel ball retainer, rolling friction is generated between the ball and a welding wire, the steel ball retainer comprises a flexible steel ball retainer in the flexible section and a rigid steel ball retainer in the straight cylinder diameters, and the flexible steel ball retainer can follow the flexible section to be bent.

2. The low drag torch wire feeder of claim 1, wherein the flexible ball retainer is a tubular flexible rubber sheet attached to the inner wall of the flexible segment.

3. A low drag welding gun wire feeder as defined in claim 2 wherein said flexible rubber sheet is provided with an arcuate recess having a diameter greater than the diameter of said ball, said ball being rollable within said arcuate recess.

4. A low drag weld gun wire feeder as set forth in claim 3 wherein said arcuate recess forms an opening through which said ball protrudes, and wherein the diameter of said opening is less than the diameter of said ball.

5. The low drag torch wire feeder of claim 2 wherein each of said balls corresponds to an arcuate recess and a gap is formed between adjacent arcuate recesses.

6. A low drag welding gun wire feeder as defined in claim 1 in which said balls are circumferentially uniformly spaced in said flexible ball retainer at different axial spacings.

7. The low resistance welding gun wire feeder of claim 1, characterized in that the nozzle assembly comprises a conductive nozzle, a conductive nozzle seat, an insulator and a nozzle, wherein the conductive nozzle, the conductive nozzle seat and the insulator are in threaded connection with the welding gun diameter in sequence, and the nozzle is arranged outside the conductive nozzle and in threaded connection with the welding gun diameter.

8. A low drag welding gun wire feeder as defined in claim 1 in which the gun body assembly includes a gun housing, a switch, a holding rod, a connecting projection and a connecting hole; the switch is installed at the bottom of the gun shell and connected with the holding rod, the connecting protrusion is located at the front end of the gun shell, the connecting hole is located at the rear end of the gun shell, and the connecting hole is further provided with a wire feeding interface, a control wire interface and a gas feeding interface.

9. The low drag torch wire feeder of claim 7 wherein a welding wire through hole is provided in said attachment projection and attachment threads are provided on the outside of said attachment projection.

10. The low drag torch wire feeder of claim 8 wherein said cable assembly comprises a spring sheath, a control wire, a wire feed tube and a gas feed tube, said cable assembly being connected to said attachment hole.

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