CN113909640B - Low-resistance wire feeding device - Google Patents
Low-resistance wire feeding device Download PDFInfo
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- CN113909640B CN113909640B CN202111310362.7A CN202111310362A CN113909640B CN 113909640 B CN113909640 B CN 113909640B CN 202111310362 A CN202111310362 A CN 202111310362A CN 113909640 B CN113909640 B CN 113909640B
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- welding
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- steel ball
- wire feeding
- gun
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/28—Supporting devices for electrodes
- B23K9/287—Supporting devices for electrode holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
Abstract
The invention discloses a low-resistance wire feeding device which comprises a welding gun head, a welding cable, a welding gun tail and a wire guide machine, wherein the front end of the welding cable is connected with the welding gun head, the rear part of the welding cable is connected with the welding gun tail, a wire feeding hose penetrates through the welding cable, the length of the wire feeding hose is 2-6 m, a plurality of steel ball retainers are arranged in the wire feeding hose, steel balls are uniformly distributed in the circumferential direction of the steel ball retainers, and a welding wire led out by the wire guide machine penetrates through the steel ball retainers and generates rolling friction on the steel balls. The utility model provides a low resistance wire drive feed unit, keeps the ware through the steel ball that contains the steel ball at sending a hose inside setting, compares and directly adopts and send a hose, and the welding wire conveying is changed into rolling friction through the steel ball by original sliding friction during through keeping the ware, has reduced the frictional resistance of welding wire conveying, promotes the conveying of welding wire in sending a hose.
Description
Technical Field
The invention belongs to the technical field of welding equipment, and particularly relates to a low-resistance wire feeding device.
Background
Welding, also known as fusion welding, is a manufacturing process and technique for joining metals or other thermoplastic materials by heating at high temperatures or pressures, and modern welding uses a wide variety of energy sources, including gas flame, electric arc, laser, electron beam, friction, and ultrasonic, among others.
In the actual operation process of welding, the welding wire installed in the welding cable penetrates through the wire feeding hose in the welding cable by the wire guide machine and is transmitted to the contact nozzle for welding. In the prior art, the structure of the wire feeding hose is usually directly adopted to perform wire feeding, the welding wire and the inner wall of the wire feeding hose generate sliding friction, so that a large amount of powder rubbed by the welding wire is attached to the inner wall of the wire feeding hose, and through accumulation for a period of time, the welding wire powder attached to the inner wall of the wire feeding hose easily causes blockage in the welding wire conveying process, and the conveying of the welding wire in the wire feeding hose is blocked.
Disclosure of Invention
In view of the above disadvantages, the present invention provides a low resistance wire feeding device, wherein the wire feeding hose is internally provided with a steel ball retainer containing steel balls, and compared with a direct wire feeding hose, the original sliding friction is converted into rolling friction through the steel ball retainer during the wire feeding, so that the friction resistance of the wire feeding is reduced, and the wire feeding in the wire feeding hose is promoted.
The invention is realized by the following technical scheme:
a low-resistance wire feeding device comprises a welding gun head, a welding cable, a welding gun tail and a wire guide machine, wherein the front end of the welding cable is connected with the welding gun head, the rear end of the welding cable is connected with the welding gun tail, and a wire feeding hose penetrates through the welding cable. The length of the wire feeding hose is 2-6 m, and the length of the wire feeding hose is preferably 3 meters, 3.6 meters or 4.5 meters. The wire feeding hose is internally provided with a plurality of steel ball retainers, the steel ball retainers are inserted into the wire feeding hose to form a tubular wire feeding structure, and a welding wire led out by the wire guiding machine penetrates through the tubular wire feeding structure to perform wire feeding work. The steel balls are circumferentially and uniformly distributed on the steel ball retainer, and the steel balls are circumferentially and uniformly distributed, so that the steel balls are uniformly stressed in the process of conveying the welding wire, and the steel balls are not easily damaged. The welding wire led out by the wire guide machine passes through the steel ball retainer and generates rolling friction with the steel ball. Compared with the prior art, the wire guide machine directly adopts the wire feeding hose to feed wires, the welding wires and the wire feeding hose generate sliding friction, the steel ball retainer is arranged in the wire feeding hose, the welding wires and the steel balls in the steel ball retainer are in contact to carry out rolling friction, the friction resistance is smaller, and the welding wires guided out by the wire guide machine can be conveyed more favorably.
Further, the steel ball retainers differ in length. Because the steel ball retainer belongs to a rigid part, the bending capability of the steel ball retainer is weaker, and the bending point of the wire feeding hose is positioned at the gap between the adjacent steel ball retainers when the steel ball retainer is bent, the longer the steel ball retainer is, the more the steel ball retainer is not beneficial to bending the wire feeding hose; the shorter the length of the steel ball retainer is, the more the wire feeding hose can be bent. The wire feeding hose with the steel ball retainer with the proper length can be selected for use according to different use scenes of the welding gun.
Further, the length of the steel ball retainer is gradually decreased along the direction from the tail of the welding gun to the head of the welding gun. The wire feeding hose is internally provided with steel ball retainers with different length types, the part close to the tail part of the welding gun adopts the steel ball retainer with longer length, the part close to the head part of the welding gun adopts the steel ball retainer with shorter length, and the length of the steel ball retainer is gradually decreased from the part close to the tail part of the welding gun to the part close to the head part of the welding gun. During welding, the part of the wire feeding hose at the tail part of the welding gun is inserted on the wire guiding machine, and the requirement for bending the part at the tail part of the welding gun is low and is relatively fixed, so that a steel ball retainer with a long length is adopted; the wire feeding hose has high bending requirement on the head part of the welding gun and is relatively flexible, so that the steel ball retainer with shorter length is adopted. It should be noted that the lengths of the steel ball retainers are not decreased sequentially, but decreased by regions.
Further, the steel ball retainers have the same length, and the number of axial ball rows of each of the steel ball retainers is different. The lengths of the steel ball retainers are the same, so that the steel ball retainers can be conveniently installed in the wire feeding hose. The steel ball retainers are of various types with different axial ball row numbers, and the steel ball retainers with more axial ball row numbers are more capable of bearing larger force, more difficult to damage and higher in cost correspondingly; a ball retainer with a smaller number of axial ball rows will be more susceptible to damage and correspondingly less expensive, as the forces that can be withstood are smaller. In general, when a welding gun is frequently used by an enterprise or the like, a steel ball holder having a large number of axial ball rows is selected, and when a welding gun is occasionally used by an individual or the like, a steel ball holder having a small number of axial ball rows is selected.
Further, the axial ball row number of the steel ball retainer is gradually decreased along the direction from the tail part of the welding gun to the head part of the welding gun. The wire feeding hose can be internally provided with steel ball retainers with different axial ball rows, the axial ball rows of the part of the steel ball retainers close to the tail part of the welding gun are more, the axial ball rows of the part of the steel ball retainers close to the head part of the welding gun are smaller, and the axial ball rows of the steel ball retainers are gradually decreased from the part close to the tail part of the welding gun to the part close to the head part of the welding gun. In the welding wire conveying process, the force applied to the steel balls of the part of the steel ball retainer at the tail part of the welding gun is larger than the force applied to the steel balls of the part of the steel ball retainer at the head part of the welding gun, so that the steel ball retainer with a larger axial ball row number is adopted at the tail part of the welding gun, the steel ball retainer with a smaller axial ball row number is adopted at the head part of the welding gun, and the axial ball row number of the steel ball retainer is gradually decreased from the part close to the tail part of the welding gun to the part close to the head part of the welding gun. It should be noted that the number of axial ball rows of the ball holder is decreased in the area, rather than decreasing sequentially for each segment of the ball holder.
Furthermore, a limiting bulge is arranged in the wire feeding hose and is positioned between the adjacent steel ball retainers. The limiting bulge is arranged on the inner wall of the wire feeding hose and positioned between two adjacent steel ball retainers, and can play a role in limiting the steel ball retainers. The limiting protrusions are of an annular structure protruding from the inner wall of the wire feeding hose, and a certain gap can be ensured between the adjacent steel ball retainers. The spacing protrusion can effectively separate adjacent steel ball retainers, and the phenomenon that a plurality of sections of steel ball retainers slide greatly in the wire feeding hose is avoided. In addition, because spacing arch makes and has certain clearance between the adjacent steel ball retainer, the existence in this clearance has made things convenient for a certain degree of buckling to send a hose to carry out. In one wire feeding hose, when the lengths of the steel ball retainers are the same, the distances between two adjacent limiting bulges are the same because the lengths of the steel ball retainers are the same; when the lengths of the steel ball retainers are different, the distance between every two adjacent limiting protrusions is different, the adjacent distance between every two adjacent limiting protrusions is gradually reduced from the part close to the tail part of the welding gun to the part close to the head part of the welding gun according to the distribution of the steel ball retainers with different length types, and the distance between every two adjacent limiting protrusions can be just matched with one section of the steel ball retainer.
Furthermore, a gap is reserved between the steel ball and the outer wall of the steel ball retainer, the steel ball protrudes out of the inner wall of the steel ball retainer, and a welding wire in the wire feeding hose is only contacted with the steel ball. After the steel balls are loaded into the retainer of the steel ball retainer, the steel balls can freely roll in the retainer. A certain gap is formed between the steel ball and the outer wall of the steel ball retainer, and after the steel ball retainer is arranged in the wire feeding hose, the steel ball is not contacted with the inner wall of the wire feeding hose, so that the steel ball is prevented from being rubbed with the wire feeding hose to generate extra resistance. The steel ball is projected on a part of the inner wall of the steel ball retainer, and the welding wire is contacted with the steel ball of the projected part of the inner wall of the steel ball retainer when being conveyed in the steel ball retainer. The protruding degree of the steel ball on the inner wall of the steel ball retainer can ensure that the welding wire is not in contact with the inner wall of the steel ball retainer, and the welding wire is not in contact with the inner wall of the steel ball retainer. The welding wire in the wire feeding hose is only contacted with the steel ball, so that the welding wire only generates rolling friction in the conveying process, and the sliding friction generated by the contact of the welding wire and the inner wall of the steel ball retainer is avoided.
Further, the welding gun head comprises a nozzle, a conductive nozzle seat, an insulating ring and a gun neck, the insulating ring is installed between the gun neck and the conductive nozzle seat, the conductive nozzle is fixedly installed on the conductive nozzle seat, the nozzle is sleeved outside the front end of the gun neck, the insulating ring and the conductive nozzle seat, the front end of the wire feeding hose sequentially penetrates through an inner tube of the gun neck, an inner hole of the conductive nozzle seat and the tail end of the front end of the wire feeding hose to abut against the inner wall of the conductive nozzle, and the inner hole of the conductive nozzle is consistent with the axis of an inner hole of a steel ball retainer at the most front end of the wire feeding hose. Because the welding wire is electrified during welding, in order to avoid the rifle neck electrified, install the insulating ring between rifle neck and conducting nozzle seat, the conducting nozzle seat can make things convenient for the conducting nozzle detachable to install on the conducting nozzle seat. The nozzle is the gas shield source of the torch and can influence the movement of the gas stream. The front end of the wire feeding hose penetrates through the gun neck inner tube, the inner hole of the conductive nozzle base and the tail end of the front end to abut against the inner wall of the conductive nozzle, and the welding wire penetrates out of the inner hole of the conductive nozzle through the wire feeding hose, so that the welding work is facilitated. The axis of the inner hole of the contact tube is consistent with the axis of the inner hole of the steel ball retainer, so that a welding wire can directly penetrate out of the contact tube after entering the contact tube from the steel ball retainer inside the wire feeding hose, and the inner hole of the contact tube is prevented from being aligned with the inner hole of the steel ball retainer at the foremost end of the wire feeding hose to block the transmission of the welding wire.
Furthermore, the tail part of the wire feeding hose is fixedly connected with a wire guide nozzle, and a wire inlet hole of the wire guide nozzle is consistent with the axis of a hole of a section of steel ball retainer at the tail end of the wire feeding hose. The tail part of the wire feeding hose is fixed with the wire guide nozzle, the wire guide nozzle is convenient for the installation of the wire feeding hose, and meanwhile, the welding wire is convenient to penetrate into the wire feeding hose. The wire inlet hole of the wire guide nozzle is consistent with the axis of the hole of the steel ball retainer at the tail of the wire feeding hose, so that a welding wire can directly contact with the steel ball after entering the steel ball retainer inside the wire feeding hose from the wire guide nozzle, and the work of correcting whether the welding wire accurately penetrates into the steel ball retainer is omitted.
Furthermore, the welding gun tail portion comprises a rear gun shell, a welding plug and a locking cap, the welding plug is fixedly connected with the rear gun shell, the wire guide nozzle is connected to the welding plug in an inserting mode, the wire guide nozzle is further fixed with the welding plug through the locking cap, the locking cap is provided with an internal thread, the wire guide nozzle is provided with an external thread connector matched with the internal thread of the locking cap, and a sealing ring is further arranged between the external thread connector and the welding plug. The wire guide nozzle of the wire feeding hose communicated with the tail of the wire feeding hose is inserted into the welding plug, and the wire guide nozzle and the welding plug are fixed through the locking cap. Adopt the locking cap to fix, when being convenient for welding cable to change the wire feed hose of different models, the locking cap can adapt to the seal wire mouth of different models. The external thread joint of the thread guide nozzle is abutted against the welding plug. The welding plug has an external thread at the abutting part with the thread guide nozzle, which is the same as the external thread joint of the thread guide nozzle. The locking cap fixes the wire guide nozzle and the welding plug in a threaded connection mode, so that the wire guide nozzle is convenient to disassemble, and the connection sealing performance is good. When the wire guide nozzle is matched with the welding plug through the locking cap, the sealing connection between the wire guide nozzle and the welding plug is realized by the sealing ring, so that the sealing connection between the wire feed hose and the tail part of the welding gun is realized, and the elastic sealing effect is firm and stable.
Drawings
FIG. 1 is a schematic diagram illustrating a low drag wire feeder arrangement of the present invention;
FIG. 2 is a schematic connection diagram illustrating an exemplary embodiment of a low drag wire feeder of the present invention;
FIG. 3 is a partial cross-sectional view of the weld cable portion of the low drag wire feeder of the present invention;
FIG. 4 is a schematic diagram illustrating the connections of an exemplary embodiment of the wire feed hose and its internal structure of a low drag wire feeder of the present invention.
Reference numerals:
1. the welding gun comprises a welding gun head, 11, a nozzle, 12, a conductive nozzle, 13, a conductive nozzle seat, 14, an insulating ring, 15, a gun neck, 2, a welding cable, 21, a wire guide nozzle, 211, an external thread connector, 212, a sealing ring, 22, a wire feeding hose, 221, a steel ball retainer, 222, a steel ball, 223, a limiting protrusion, 3, a welding gun tail, 31, a rear gun shell, 32, a welding plug, 33, a locking cap, 4 and a wire guide machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 4, the low resistance wire feeding device includes a welding gun head 1, a welding cable 2, a welding gun tail 3, and a wire guide 4, wherein the front end of the welding cable 2 is connected to the welding gun head 1, the rear end of the welding cable 2 is connected to the welding gun tail 3, and a wire feeding hose 22 is threaded through the welding cable 2. The length of the wire feed hose 22 is 2 to 6m, and the length of the wire feed hose 22 is preferably 3m, 3.6m, or 4.5m. The welding wire guided out by the wire guide 4 passes through the wire feeding hose 22 in the welding cable 2 from the welding gun tail 3, and passes through the welding gun head 1 after being transmitted by the wire feeding hose 22, thereby completing the wire feeding process.
Preferably, the welding gun tail 3 comprises a rear gun shell 31, a welding plug 32 and a locking cap 33, the welding plug 32 is fixedly connected with the rear gun shell 31, the wire guide nozzle 21 is inserted into the welding plug 32, and the wire guide nozzle 21 and the welding plug 32 are further fixed through the locking cap 33. The wire feeding hose 22 and the wire guide nozzle 21 at the tail part thereof are inserted into the welding plug 32, and the wire guide nozzle 21 and the welding plug 32 are fixed through a locking cap 33. The locking cap 33 is adopted for fixing, so that when the welding cable 2 is replaced by different types of wire feeding hoses 22, the locking cap 33 can adapt to different types of wire guiding nozzles 21.
Preferably, the welding gun head 1 includes a nozzle 11, a conductive nozzle 12, a conductive nozzle base 13, an insulating ring 14, and a gun neck 15, the insulating ring 14 is installed between the gun neck 15 and the conductive nozzle base 13, the conductive nozzle 12 is fixedly installed on the conductive nozzle base 13, the front end of the gun neck 15, the insulating ring 14, and the exterior of the conductive nozzle base 13 are sleeved with the nozzle 11, the front end of the wire feeding hose 22 sequentially passes through the inner tube of the gun neck 15, the inner hole of the conductive nozzle base 13, and the tail of the front end abuts against the inner wall of the conductive nozzle 12, and the inner hole of the conductive nozzle 12 is consistent with the axis of the inner hole of the steel ball holder 221 at the foremost end of the wire feeding hose 22. Because the welding wire is electrified during welding, in order to avoid electrifying the gun neck 15, an insulating ring 14 is arranged between the gun neck 15 and the conductive nozzle seat 13, and the conductive nozzle seat 13 can facilitate the conductive nozzle 12 to be detachably arranged on the conductive nozzle seat 13. The nozzle 11 is the source of gas shielding for the torch and can influence the movement of the gas stream. The front end of the wire feeding hose 22 passes through the inner tube of the gun neck 15, the inner hole of the conductive nozzle base 13, and the tail end of the front end abuts against the inner wall of the conductive nozzle 12, and the welding wire penetrates out of the inner hole of the conductive nozzle 12 through the wire feeding hose 22, so that the welding work is facilitated.
In the present application, a plurality of steel ball retainers 221 are installed inside the wire feeding hose 22, after the plurality of steel ball retainers 221 are inserted into the wire feeding hose 22, a tubular wire feeding structure is formed, and the welding wire guided out by the wire guide 4 passes through the tubular wire feeding structure to perform wire feeding operation.
In one embodiment, the ball holder 221 is a linear bearing, and a plurality of linear bearings are installed inside the wire feeding hose 22 to form a tubular wire feeding structure, through which the wire guide 4 performs wire feeding operation on the welding wire.
The steel balls 222 are uniformly distributed on the steel ball retainer 221 in the circumferential direction, and the steel balls 222 are uniformly distributed in the circumferential direction, so that the steel balls 222 are uniformly stressed in the welding wire conveying process, and the steel balls 222 are not easily damaged. The welding wire drawn out by the wire guide 4 passes through the steel ball retainer 221, and the welding wire and the steel ball 222 generate rolling friction. In the actual welding process, when the wire feeding hose 22 is used for machine welding, the stability of the moving welding wire is more required to be ensured compared with manual operation, the welding wire is prevented from being blocked in the wire feeding hose 22, and therefore, the sliding friction is changed into the rolling friction. Compared with the prior art that the wire guiding machine 4 directly adopts the wire feeding hose 22 to perform wire feeding operation, the welding wire and the wire feeding hose 22 generate sliding friction, the steel ball retainer 221 is installed in the wire feeding hose 22, the welding wire contacts with the steel ball 222 in the steel ball retainer 221 to perform rolling friction, the friction resistance is smaller, and the welding wire guided out by the wire guiding machine 4 can be more favorably conveyed.
In one embodiment, 5 balls 222 are uniformly distributed on the ball retainer 221 along the circumference, and contact with 5 balls 222 during the welding wire conveying process, so that the conveying resistance of the welding wire is reduced by the rolling of the balls 222. The stress of the 5 steel balls 222 is relatively uniform, and the damage to the steel balls 222 and the steel ball holder 221 caused by concentrated stress of the steel balls 222 is avoided by the mode of uniformly distributing the steel balls 222 in the circumferential direction. It should be noted that the number of the balls 222 evenly distributed on the ball holder 221 in the circumferential direction is not limited to 5, and may be plural.
Preferably, the steel ball retainers 221 are of a plurality of types that differ in length. Since the steel ball retainer 221 is a rigid member with a weak bending capability, the bending point of the wire feeding hose 22 is located at the gap between adjacent steel ball retainers 221 when the wire feeding hose is bent, and thus the longer the steel ball retainer 221 is, the more the wire feeding hose 22 is not bent; the shorter the length of the ball retainer 221, the more the wire feed hose 22 can be bent. The wire feed hose 22 with the steel ball retainer 221 with the proper length can be selected for use according to different use scenes of the welding gun.
In one embodiment, a certain enterprise performs welding work with more welding spots and more scattered positions, and a welding gun needs to be flexibly used for welding work. The enterprise may choose to install a wire feed hose 22 with a shorter length of ball retainer 221 to accommodate flexible welding operations.
Preferably, the length of the steel ball holder 221 is gradually decreased from the portion near the welding gun tail 3 to the portion near the welding gun head 1. The steel ball retainers 221 with different length types are arranged in one wire feeding hose 22, the steel ball retainer 221 with longer length is adopted at the part close to the welding gun tail part 3, the steel ball retainer 221 with shorter length is adopted at the part close to the welding gun head part 1, and the length of the steel ball retainer 221 is gradually reduced from the part close to the welding gun tail part 3 to the part close to the welding gun head part 1. During welding, the wire feeding hose 22 is inserted into the wire guiding machine 4 at the tail part 3 of the welding gun, and the bending requirement at the tail part 3 of the welding gun is low and relatively fixed, so that the steel ball retainer 221 with a long length is adopted; the wire feed hose 22 has a relatively high bending requirement in the portion of the torch head 1, and is relatively flexible, so that a steel ball holder 221 having a relatively short length is used. It should be noted that the lengths of the ball retainers 221 are not sequentially decreased, but the lengths of the ball retainers 221 are decreased by regions.
In one embodiment, the ball retainers 221 of a wire feed hose 22 are of three types, 4 cm, 5 cm and 6 cm in length. Equally dividing the wire feeding hose 22 into three parts, and adopting a steel ball retainer 221 with the length of 6 centimeters at the part close to the tail part 3 of the welding gun; a steel ball retainer 221 with the length of 5 centimeters is adopted at the middle part of the wire feeding hose 22; a 4 cm long ball holder 221 is used in a portion close to the welding gun head 1. By adopting the wire feeding hose 22 with the steel ball retainers 221 distributed and installed in this way, normal wire feeding can be ensured, and the manufacturing cost is lower. It should be noted that the types of the ball retainers 221 having different lengths used in one wire feed hose 22 are not limited to the three types of 4 cm, 5 cm, and 6 cm described above, and may be other types of ball retainers 221 having different lengths.
Preferably, the ball retainers 221 having the same length have a plurality of types with different numbers of axial ball rows. The lengths of the ball retainers 221 are the same, so that the ball retainers 221 can be installed inside the wire feed hose 22 conveniently. The steel ball retainers 221 are of various types with different axial ball row numbers, and the steel ball retainers 221 with more axial ball row numbers are more capable of bearing larger force and are more difficult to damage, so that the cost is correspondingly higher; the smaller the number of ball rows in the axial direction, the smaller the force that can be applied to the ball holder 221, the more easily the ball holder can be damaged, and the lower the cost. In general, when a welding gun is frequently used by a company or the like, the steel ball holder 221 having a large number of axial ball rows is selected, and when a welding gun is occasionally used by an individual or the like, the steel ball holder 221 having a small number of axial ball rows is selected.
In one embodiment, a plurality of ball retainers 221 are required to be installed in one wire feed hose 22, which is time consuming. Because the steel ball retainers 221 are the same in length, the steel ball retainers 221 of the same type can be directly installed without distinguishing, and the installation time of the steel ball retainers 221 is saved to a certain extent. The steel ball retainer 221 with the symmetrical structure is adopted, so that the installation direction does not need to be distinguished during installation, and the installation time is further saved.
In one embodiment, there are two ball retainer 221 types of 4 rows and 5 rows of axial ball rows. Welding guns are frequently used in enterprises, and a wire feeding hose 22 consisting of 5 rows of axial ball rows of steel ball retainers 221 can be selected; for personal use, a wire feed hose 22 consisting of 4 axial ball rows of ball retainers 221 may be used, since it is only used occasionally. The wire feed hose 22 of 5 axial ball rows of ball retainers 221 is more durable than the wire feed hose 22 of 4 axial ball rows of ball retainers 221, but is relatively more costly. It should be noted that the number of axial ball rows is not limited to the type in which there are two types of ball retainers 221, 4 rows and 5 rows, but includes a plurality of types of ball retainers 221 having a plurality of axial ball rows.
Preferably, the number of axial ball rows of the steel ball holder 221 used decreases from the portion near the torch tail 3 to the portion near the torch head 1. The steel ball retainers 221 with different axial ball rows can be arranged in one wire feeding hose 22, the axial ball rows of the steel ball retainers 221 close to the welding gun tail 3 are more, the axial ball rows of the steel ball retainers 221 close to the welding gun head 1 are less, and the axial ball rows of the steel ball retainers 221 are gradually decreased from the parts close to the welding gun tail 3 to the parts close to the welding gun head 1. In the welding wire conveying process, the force applied to the steel balls 222 of the part of the steel ball retainer 221 of the welding gun tail 3 is larger than the force applied to the steel balls 222 of the part of the steel ball retainer 221 of the welding gun head 1, so that the steel ball retainer 221 with a larger number of axial ball rows is adopted in the part of the welding gun tail 3, the steel ball retainer 221 with a smaller number of axial ball rows is adopted in the part of the welding gun head 1, and the number of the axial ball rows of the steel ball retainer 221 is gradually reduced from the part close to the welding gun tail 3 to the part close to the welding gun head 1. It should be noted that the number of axial ball rows of the ball holder 221 is not sequentially decreased for each segment, but is decreased by regions.
In one embodiment, the ball retainer 221 is of a type having 4, 5, and 6 axial ball rows, and the wire feed hose 22 is equally divided into three parts, and the ball retainer 221 having 6 axial ball rows is used in a portion close to the welding gun tail 3; a steel ball retainer 221 with 5 axial ball rows is adopted in the middle part of the wire feeding hose 22; a ball holder 221 having 4 rows of axial balls is used in a portion close to the torch head 1. By adopting the wire feeding hoses 22 with the steel ball retainers 221 distributed in this way, normal wire feeding can be ensured, and the manufacturing cost is lower. It should be noted that the types of the ball retainers 221 with different axial ball rows used in one wire feeding hose 22 are not limited to the three types of 4 rows, 5 rows and 6 rows, and may also be other types of ball retainers 221 with different axial ball rows, such as 6 rows, 7 rows and 8 rows; it is also possible to have a variety of axial ball row number ball retainer 221 types, such as 5 rows, 6 rows, 7 rows, and 8 rows.
Preferably, a limiting protrusion 223 is disposed in the wire feeding hose 22, and the limiting protrusion 223 is located between the adjacent ball holders 221. The limiting protrusion 223 is installed on the inner wall of the wire feeding hose 22 and located between two adjacent steel ball retainers 221, and can limit the steel ball retainers 221. The limiting protrusion 223 is an annular structure protruding from the inner wall of the wire feeding hose 22, and can ensure a certain gap between adjacent steel ball retainers 221. The limiting protrusions 223 can effectively separate the adjacent steel ball retainers 221, and prevent a plurality of steel ball retainers 221 from sliding greatly in the wire feeding hose 22. In addition, because the limiting protrusion 223 has a certain gap between the adjacent steel ball retainers 221, the existence of the gap facilitates the wire feeding hose 22 to bend to a certain degree. In one wire feeding hose 22, when the lengths of the steel ball retainers 221 are the same, because the lengths of the steel ball retainers 221 are the same, the distances between two adjacent limiting protrusions 223 are the same; when the lengths of the steel ball retainers 221 are different, the distance between every two adjacent limiting protrusions 223 is different, the adjacent distance between every two adjacent limiting protrusions 223 is gradually reduced from the part close to the tail part 3 of the welding gun to the part close to the head part 1 of the welding gun according to the distribution of the steel ball retainers 221 with different length types, and the distance between every two adjacent limiting protrusions 223 can be just matched with one section of the steel ball retainer 221.
In one embodiment, the limiting protrusion 223 is a resilient structure, and can play a role of buffering and damping when the steel ball holder 221 is used or installed. The limit projection 223 can limit the ball retainer 221 to a certain extent from being installed in the wire feed hose 22 only in one direction.
Preferably, a gap is formed between the steel ball 222 and the outer wall of the steel ball holder 221, the steel ball 222 protrudes out of the inner wall of the steel ball holder 221, and the welding wire in the wire feeding hose 22 only contacts with the steel ball 222. The balls 222 are loaded into the cage of the ball retainer 221 and are free to roll within the cage. A certain gap is formed between the steel ball 222 and the outer wall of the steel ball retainer 221, and after the steel ball retainer 221 is installed in the wire feeding hose 22, the steel ball 222 is not in contact with the inner wall of the wire feeding hose 22, so that the steel ball 222 is prevented from rubbing against the wire feeding hose 22 to generate extra resistance. After the outer wall of the ball retainer 221 contacts the inner wall of the wire feeding hose 22, the rotation of the ball 222 is not affected.
The steel ball 222 protrudes from the inner wall of the steel ball holder 221, and the welding wire is brought into contact with the steel ball 222 protruding from the inner wall of the steel ball holder 221 when the welding wire is transported in the steel ball holder 221. The protrusion degree of the steel ball 222 on the inner wall of the steel ball retainer 221 can ensure that the welding wire is not in contact with the inner wall of the steel ball retainer 221, and the welding wire is preferably not in contact with the inner wall of the steel ball retainer 221. The welding wire in the wire feeding hose 22 only contacts with the steel ball 222, so that the welding wire only generates rolling friction during the conveying process, and the sliding friction generated by the contact of the welding wire and the inner wall of the steel ball retainer 221 is avoided. The welding wire led out by the wire guide 4 penetrates into the steel ball retainer 221 to contact with the steel ball 222, the steel ball 222 rolls when the welding wire is conveyed, only rolling friction resistance exists between the welding wire and the wire feeding hose 22, and the sliding friction of the welding wire in the prior art is converted into rolling friction by utilizing the steel ball retainer 221, so that low-resistance wire feeding is realized.
Preferably, the axis of the inner hole of the contact tube 12 is consistent with the axis of the inner hole of the steel ball retainer 221, so that the welding wire can directly penetrate out of the contact tube 12 after entering the contact tube 12 from the steel ball retainer 221 inside the wire feeding hose 22, and the inner hole of the contact tube 12 is prevented from being aligned with the inner hole of the steel ball retainer 221 at the foremost end of the wire feeding hose 22, thereby preventing the welding wire from being conveyed.
In one embodiment, the front end of the gun neck 15 is sleeved with a hollow insulating ring 14, the insulating ring 14 is connected with the front end of the gun neck 15 and sleeved outside the conductive nozzle base 13, and the conductive nozzle base 13 is insulated to prevent creepage. The contact tip 12 is mounted inside the contact tip holder 13. A nozzle 11 is sleeved outside the front end of the gun neck 15, the insulating ring 14 and the conductive nozzle base 13, the nozzle 11 is a hollow shell, and the front end of the nozzle 11 is provided with a closed frustum structure. The forward end of the wire feed hose 22 abuts the inner wall of the contact tip 12.
Preferably, the wire guide nozzle 21 is fixedly connected to the tail of the wire feeding hose 22, and the wire inlet of the wire guide nozzle 21 is aligned with the hole axis of the ball holder 221 at the tail of the wire feeding hose 22. The tail of the wire feeding hose 22 is fixed with the wire guiding nozzle 21, so that the wire feeding hose 22 can be conveniently installed through the wire guiding nozzle 21, and meanwhile, a welding wire can conveniently penetrate into the wire feeding hose 22. The wire inlet hole of the wire guide nozzle 21 is consistent with the axis of the hole of the steel ball retainer 221 at the tail end of the wire feeding hose 22, so that the welding wire can directly contact with the steel ball 222 after entering the steel ball retainer 221 in the wire feeding hose 22 from the wire guide nozzle 21, and the work of correcting whether the welding wire accurately penetrates into the steel ball retainer 221 is omitted.
In one embodiment, the wire guide nozzle 21 is welded to the end of the wire feed hose 22, and the welding method is adopted to improve the firmness of the wire guide nozzle 21 and the wire feed hose 22.
Preferably, the locking cap 33 has an internal thread, the guide wire nozzle 21 is provided with an external thread joint 211 matched with the internal thread of the locking cap 33, and a sealing ring 212 is further arranged between the external thread joint 211 and the welding plug 32. The wire feeding hose 22 is connected with the wire guide nozzle 21 at the tail part thereof and inserted into the welding plug 32, and the wire guide nozzle 21 and the welding plug 32 are fixed through the locking cap 33. The locking cap 33 is adopted for fixing, so that when the welding cable 2 is replaced by different types of wire feeding hoses 22, the locking cap 33 can adapt to different types of wire guiding nozzles 21. The male thread 211 of the guide wire nozzle 21 abuts against the weld plug 32. The weld plug 32 has a male screw similar to the male screw 211 of the guide wire 21 at a portion abutting against the guide wire 21. The locking cap 33 fixes the wire guide nozzle 21 and the welding plug 32 in a threaded connection mode, so that the wire guide nozzle 21 is convenient to disassemble, and the connection sealing performance is good. When the wire guide nozzle 21 is matched with the welding plug 32 through the locking cap 33, the sealing connection between the wire guide nozzle 21 and the welding plug 32 is realized by the sealing ring 212, so that the sealing connection between the wire feeding hose 22 and the welding gun tail 3 is realized, and the elastic sealing effect is firm and stable.
In an embodiment, the locking cap 33 is a clip, and the guide wire nozzle 21 and the welding plug 32 are fixedly connected by a snap-in manner, so that the guide wire nozzle 21 can be quickly detached by the snap-in manner.
In one embodiment, the front end of the wire feeding hose 22 is supported on the inner wall of the contact tube 12 of the welding gun head 1, the tail of the wire feeding hose 22 is connected with the wire guide nozzle 21, the wire guide nozzle 21 is provided with an external threaded connector 211, and the wire guide nozzle 21 is inserted into the welding plug 32 and then is fixed by a locking cap 33 in a threaded manner. By adopting the threaded connection, the front end of the wire feeding hose 22 can be firmly supported against the inner wall of the contact nozzle 12, and the axial stress of the wire feeding hose 22 in the welding cable 2 can be adjusted within a certain range.
When the low-resistance wire feeding device is adopted, the steel ball retainer 221 in the wire feeding hose 22 can make the welding wire receive smaller resistance in the wire feeding hose 22, so as to realize low-resistance wire feeding.
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 (7)
1. A low-resistance wire feeding device comprises a welding gun head, a welding cable, a welding gun tail and a wire guide machine, wherein the front end of the welding cable is connected with the welding gun head, and the rear part of the welding cable is connected with the welding gun tail;
the lengths of the steel ball retainers are different, and the lengths of the steel ball retainers are sequentially reduced along the direction from the tail part of the welding gun to the head part of the welding gun.
2. The low drag wire feeder of claim 1, wherein the length of each ball retainer is the same and the number of axial ball rows of each ball retainer is different.
3. The low drag wire feeder of claim 2 wherein the number of axial ball rows of the ball holder decreases in sequence from the gun tail to the gun head.
4. A low drag wire feeder as defined in claim 1 or claim 3 wherein a limiting protrusion is provided within the wire feed hose, said limiting protrusion being located between adjacent ball retainers.
5. The low resistance wire feeding device of claim 1, wherein the welding gun head comprises a nozzle, a conductive nozzle seat, an insulating ring and a gun neck, the insulating ring is installed between the gun neck and the conductive nozzle seat, the conductive nozzle is fixedly installed on the conductive nozzle seat, the front end of the gun neck, the insulating ring and the outside of the conductive nozzle seat are sleeved with one nozzle, the front end of the wire feeding hose sequentially passes through the inner tube of the gun neck, the inner hole of the conductive nozzle seat and the tail end of the front end of the wire feeding hose and abuts against the inner wall of the conductive nozzle, the inner hole of the conductive nozzle is consistent with the axis of the inner hole of the steel ball retainer.
6. The low resistance wire feeding device of claim 1, wherein the wire feeding hose tail is fixedly connected with a wire guide nozzle, the wire guide nozzle wire feeding hole is consistent with the section at the end of the wire feeding hose the hole axis of the steel ball retainer.
7. The low resistance wire feeding device of claim 6, wherein the welding gun tail comprises a rear gun shell, a welding plug and a locking cap, the welding plug is fixedly connected with the rear gun shell, the wire guide nozzle is inserted into the welding plug, the wire guide nozzle is further fixed with the welding plug through the locking cap, the locking cap has an internal thread, the wire guide nozzle is provided with an external thread joint matched with the internal thread of the locking cap, and a sealing ring is further arranged between the external thread joint and the welding plug.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111310362.7A CN113909640B (en) | 2021-11-04 | 2021-11-04 | Low-resistance wire feeding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111310362.7A CN113909640B (en) | 2021-11-04 | 2021-11-04 | Low-resistance wire feeding device |
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| CN113909640A CN113909640A (en) | 2022-01-11 |
| CN113909640B true CN113909640B (en) | 2023-02-28 |
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| CN109262115A (en) * | 2018-11-20 | 2019-01-25 | 广州镱宝电机有限公司 | A kind of welding gun, wire-feed motor connector and welding equipment |
| CN212443669U (en) * | 2020-05-26 | 2021-02-02 | 中国化学工程第六建设有限公司 | Novel wire feeding mechanism of automatic welding machine |
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2021
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| JPH11123559A (en) * | 1997-08-19 | 1999-05-11 | Nippon Light Metal Co Ltd | Welding torch for high speed mig welding |
| EP1974846A2 (en) * | 2007-03-27 | 2008-10-01 | SIDERGAS Spa | Flexible guide for a welding wire with elements articulated in any direction relative one to another |
| CN206216093U (en) * | 2016-11-18 | 2017-06-06 | 广州阿比泰克焊接技术有限公司 | Improved water-cooled welding gun |
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|---|---|
| CN113909640A (en) | 2022-01-11 |
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