Welding wire anti-twisting device

Abstract

The utility model provides a welding wire anti-twisting device, belongs to the technical field of laser welding, and is used for solving the problem of unsmooth wire feeding caused by easy twisting of a wire feeding pipe in the prior art. The utility model provides a welding wire anti-twisting device which comprises a first wire nozzle, a second wire nozzle and a quick release structure, wire holes are formed in the first wire nozzle and the second wire nozzle, the tail end of the first wire nozzle is in running fit with the head end of the second wire nozzle, and the tail end of the second wire nozzle is in running fit with the head end of the quick release structure. The quick release structure is arranged on the outer layer of the matching position of the first thread nozzle and the second thread nozzle and limits the axial unexpected relative sliding of the first thread nozzle and the second thread nozzle. By adopting the design of the wire feeding nozzle capable of movably rotating, the flexibility and the stability of the wire feeding system are obviously enhanced, the torsion of the wire feeding pipe is effectively avoided, the friction and the resistance of the welding wire in the pipe are reduced, and the welding wire is ensured to be conveyed smoothly.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser welding, in particular to a welding wire anti-twisting device. Background Art

[0002] In the field of laser welding technology, accurate and stable feeding of welding wire is a key factor in ensuring welding quality and efficiency. In traditional methods, welding wire is fed through a wire feeder connected to the welding gun via a wire feed tube. However, as the welding gun changes its various welding postures and positions during welding, the wire feed tube may twist during welding, causing deformation of the wire feed tube cross section. This phenomenon significantly increases the frictional resistance of the welding wire in the tube, causing problems such as poor wire feeding, uneven speed, and even blockage, seriously affecting the continuity of the welding operation and the quality of the weld. Therefore, the development of a new wire feeding device that can effectively prevent the wire feed tube from twisting and maintain smooth wire feeding has become the key to improving laser welding quality. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a welding wire anti-twisting device for solving the problem in the prior art that the wire feeding tube is easy to twist, resulting in poor wire feeding.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a welding wire anti-twist device, comprising:

[0005] A first wire nozzle, a second wire nozzle and a quick-release structure, wherein the first wire nozzle and the second wire nozzle are both provided with wire holes, the tail end of the first wire nozzle is rotatably matched with the head end of the second wire nozzle, and the quick-release structure is arranged on the outer layer of the matching point of the first wire nozzle and the second wire nozzle and limits the unexpected relative sliding of the first wire nozzle and the second wire nozzle in the axial direction.

[0006] Optionally, the inner circular surface of the tail end of the first nozzle is rotatably matched with the outer circular surface of the head end of the second nozzle.

[0007] Optionally, the quick-release structure includes an elastic member, a sliding ring and a locking body;

[0008] The elastic member is annular and is sleeved on the outer circular surface of the tail end of the first nozzle;

[0009] The sliding ring is slidably sleeved on the outside of the elastic member and slidably cooperates with the first wire nozzle, and the two ends of the elastic member are respectively in contact with the stepped surfaces of the first wire nozzle and the sliding ring;

[0010] A locking hole is radially provided at the mating portion of the second wire mouth and the first wire mouth, and the locking hole penetrates the first wire mouth to form a blind hole on the second wire mouth. The locking body is movably arranged in the locking hole, and the locking hole invades the second wire mouth but does not penetrate the second wire mouth. A rotary groove is provided at a corresponding position on the axis of the second wire mouth, and the rotary groove corresponds to the position of the locking hole. The locking body can roll in the rotary groove, and a step is provided on the inner circle of the sliding ring;

[0011] Initially, the elastic member forces the step to match the position of the locking body, and forces the locking body to be embedded in the first and second thread nozzles simultaneously;

[0012] After the sliding ring overcomes the elastic force and moves, the step and the locking body are offset from each other, and the locking body is disengaged from the locking hole of the second nozzle.

[0013] Optionally, the locking holes are axially distributed in at least two groups.

[0014] Optionally, the locking body is a spherical ball.

[0015] Optionally, a limit plate is provided on the second wire nozzle to limit the sliding range of the sliding ring.

[0016] Optionally, an annular retaining spring is provided at the end of the second wire nozzle, the retaining spring protrudes from the outer circumference of the second wire nozzle, and the retaining spring abuts against the step on the inner circle of the sliding ring to limit the sliding range on this side.

[0017] Optionally, a spring tube is provided at the end of the second wire nozzle, and the welding wire passes through the spring tube.

[0018] Optionally, a wire feeder is also included, which includes two groups of oppositely arranged drive wheels and a power source for driving one group of the drive wheels to rotate. The first wire nozzle is installed on the housing of the wire feeder, and the wire hole of the first wire nozzle is opposite to the center line of the two groups of drive wheels. The welding wire passes through the center line of the two groups of drive wheels to obtain power and penetrates into the first wire nozzle.

[0019] Optionally, another set of the first wire nozzle, the second wire nozzle and the quick-release structure are further included and assembled in the same way, and the two sets of devices are respectively arranged at both ends of the welding wire.

[0020] As described above, the welding wire anti-twisting device of the present invention has at least the following beneficial effects:

[0021] The rotatable wire feed nozzle design significantly enhances the flexibility and stability of the wire feeding system. This design effectively prevents twisting of the wire feed tube, reduces friction and resistance of the welding wire within the tube, and ensures smooth and unimpeded wire feeding. This not only improves the continuity and efficiency of welding operations, but also significantly optimizes weld quality, providing strong support for welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Shown is a schematic cross-sectional view of the entire utility model.

[0023] Figure 2 Shown is a schematic cross-sectional view of the sliding ring of the present invention.

[0024] Figure 3 Shown is a schematic diagram of the anti-twist device and wire feeder of the present invention.

[0025] Figure 4 Shown is a schematic diagram of the anti-twist device of the present invention applied to a welding gun.

[0026] Figure 5 Shown is a schematic diagram of the second wire nozzle and its slot structure of the present invention.

[0027] Among them: a first wire nozzle 40, a wire hole 401, a limit plate 402, a retaining spring 403, a second wire nozzle 41, a rotary groove 4110, a quick-release structure 42, an elastic member 421, a sliding ring 422, a step 4221, a locking body 423, a locking hole 424, a spring tube 43, a driving wheel 431, a power source 432, and a welding wire 92. DETAILED DESCRIPTION

[0028] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0029] See also Figures 1 to 4 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of this utility model. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by this utility model without affecting the efficacy and purpose that can be achieved by this utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this utility model without substantially changing the technical content.

[0030] The following embodiments are for illustration only and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0031] Please refer to 1 for this embodiment. The embodiment of the welding wire anti-twisting device provided by the present utility model includes:

[0032] The first wire nozzle 40, the second wire nozzle 41 and the quick-release structure 42, the first wire nozzle 40 and the second wire nozzle 41 are both provided with a wire hole 401, the tail end of the first wire nozzle 40 is rotatably matched with the head end of the second wire nozzle 41, and the quick-release structure 42 is provided on the outer layer of the matching point of the first wire nozzle 40 and the second wire nozzle 41 and limits the unexpected relative sliding of the first wire nozzle 40 and the second wire nozzle 41 in the axial direction.

[0033] In the above embodiment, the anti-twist device is provided at the wire outlet of the wire feeder or the wire outlet of the wire welding gun. During the welding operation, the welding gun needs to be used in different positions, and the welding gun will also drag the wire feed tube to move during the movement. In the prior art, the two ends of the wire feed tube are fixedly connected to the welding gun or the wire feeder. During the process of the welding gun dragging the wire feed tube to move, the wire feed tube may be twisted and deformed, thereby causing the cross-section of the wire feed tube to deform. This phenomenon significantly increases the friction resistance of the welding wire in the pipeline, causing problems such as poor wire feeding, uneven speed and even blockage, which seriously affects the continuity of the welding operation and the quality of the weld. Therefore, during the operation, the welder needs to always pay attention to the wire feed tube, straighten the wire feed tube, and avoid the wire feed tube from twisting.

[0034] In the above embodiment, the welding wire anti-twist device is installed at the wire outlet of the wire feeder (see Figure 3 ) or the wire outlet of the welding gun (see Figure 4 ), connected in the middle by a wire feeding tube. The first wire nozzle 40 and the second wire nozzle 41 of the wire anti-twist device can rotate relative to each other. Taking the wire feeding machine side as an example, please refer to Figure 3 The first wire nozzle 40 is fixedly mounted on the wire feeder housing, with the connection end between the first wire nozzle 40 and the second wire nozzle 41 facing the outside of the wire feeder. The welding wire enters the wire feed tube from the first wire nozzle 40 and enters the wire feed tube from the second wire nozzle 41. Since the first wire nozzle 40 and the second wire nozzle 41 are rotatable relative to each other, when the external wire feed tube twists during the dragging process, the torsional force is transmitted along the wire feed tube to the connection between the second wire nozzle 41 and the first wire nozzle 40. The torsional force is consumed by the rotation of the second wire nozzle 41, thereby preventing the wire feed tube from twisting.

[0035] Furthermore, if Figure 1 As shown, the inner circular surface of the tail end of the first nozzle 40 is rotatably matched with the outer circular surface of the head end of the second nozzle 41, and the axial sliding of the first nozzle 40 and the second nozzle 41 is controllably restricted by the quick release structure 42.

[0036] Specifically, the quick-release structure 42 includes an elastic member 421 , a sliding ring 422 , and a locking body 423 ;

[0037] The elastic member 421 is annular and is sleeved on the outer surface of the tail end of the first nozzle 40. A spring can be used directly;

[0038] The sliding ring 422 is slidably sleeved on the outside of the elastic member 421 and slidably cooperates with the first nozzle 40. The two ends of the elastic member 421 respectively abut against the stepped surfaces of the first nozzle 40 and the sliding ring 422, so that an interaction force is generated between the two.

[0039] The matching portion of the second wire nozzle 41 and the first wire nozzle 40 is radially provided with a locking hole 424. The locking hole 424 penetrates the first wire nozzle 40 to form a blind hole on the second wire nozzle 41. The locking body 423 is movably arranged in the locking hole 424. The formation of a blind hole means that the locking hole invades the second wire nozzle 41 but does not penetrate the second wire nozzle 41. A rotary groove 4110 is provided at a corresponding position on the axis of the second wire nozzle 41. The rotary groove 4110 corresponds to the position of the locking hole. The area where the locking hole invades the second wire nozzle 41 is located in the rotary groove 4110. The locking body 423 can roll in the rotary groove and can also move along the axis of the locking hole 424. A step 4221 is provided on the inner circle of the sliding ring 422.

[0040] Initially, the elastic member 421 forces the step 4221 to match the position of the locking body 423 and presses the locking body 423, causing the locking body 423 to be simultaneously embedded in the first thread nozzle 40 and the second thread nozzle 41. As a result, the first thread nozzle 40 and the second thread nozzle 41 cannot be axially misaligned, but can rotate relative to each other.

[0041] When it is necessary to remove the wire feeding tube, push the sliding ring 422 by hand. After the sliding ring 422 overcomes the elastic force and moves, the step 4221 and the locking body 423 are offset. Then the second wire nozzle 41 is pulled out. Under the action of the pulling force, the locking body 423 is disengaged from the locking hole 424 of the second wire nozzle 41, and the second wire nozzle 41 can be pulled out. The wire feeding tube connected to the second wire nozzle 41 can thus be removed.

[0042] In this embodiment, the locking holes 424 are distributed in at least two groups circumferentially. In a preferred embodiment, at least four groups are evenly distributed circumferentially to improve the locking performance of the locking body 423 in the locking hole 424 on the relative sliding tendency of the first wire nozzle 40 and the second wire nozzle 41 and the reliability of the locking structure itself.

[0043] Furthermore, the locking body 423 is a spherical ball bearing, the cross section of which matches the cross section of the blind hole formed on the second wire nozzle 41. Since the locking hole 424 is spherical, when the sliding ring 422 is manually pushed to cause the step 4221 to be offset from the locking body 423, and the second wire nozzle 41 is simultaneously pulled out, the locking hole 424 is easily disengaged from the blind hole on the second wire nozzle 41 under the action of the lateral force, so that the second wire nozzle 41 can be easily pulled out, realizing the disassembly of the wire feed tube.

[0044] For this example, please refer to Figure 1 and Figure 2 The second nozzle 41 is equipped with a limit plate 402 that restricts the sliding range of the sliding ring 422. An annular retaining spring 403 is installed at the end of the second nozzle 41. The retaining spring 403 protrudes from the outer circumference of the second nozzle 41 and abuts against a step 4221 on the inner circumference of the sliding ring 422, limiting the sliding range on this side. The limit plate 402, retaining spring 403, and step 4221 respectively limit the maximum sliding range of the sliding ring 422 in two directions, ensuring a stable assembly relationship and proper function of the various components.

[0045] In this embodiment, a spring tube 43 is provided at the end of the second wire nozzle 41. The wire feed tube is disposed within the spring tube, and the welding wire 92 passes through the spring tube 43 and into the wire feed tube. The spring tube 43 is provided at the transition point between the wire feed tube and the second wire nozzle 41 to absorb bending stress in the connection portion and prevent fatigue fracture at the connection portion.

[0046] For this embodiment, see Figure 3 , further comprising a wire feeder, which includes two sets of oppositely disposed drive wheels 431 and a power source 432 for driving one of the drive wheels 431. A first wire nozzle 40 is mounted on the wire feeder housing, with the wire hole 401 of the first wire nozzle 40 directly aligned with the centerline of the two drive wheels 431. The welding wire 92 passes through the centerline of the two drive wheels 431, receives power, and then passes into the first wire nozzle 40. In this embodiment, the second wire nozzle 41 can be disconnected from the first wire nozzle 40 via a quick-release structure 42, thereby disconnecting the wire feed tube from the wire feeder, facilitating welding operations.

[0047] In the above embodiment, the quick-release structure 42 is provided on the outer layer of the mating point between the first and second wire nozzles 40, 41 and restricts unintended relative axial movement of the first and second wire nozzles 40, 41, allowing them to rotate relative to each other without unexpected disengagement. However, when the quick-release structure 42 is unlocked, the second wire nozzle 41 can be detached from the first wire nozzle 40, thereby removing the wire feeder entirely. One scenario involves removing the wire feeder from a wire feeder, while the other involves removing the wire feeder from a welding gun. This improves the ease of use and maintenance of the wire feeder, wire feeder, and end-user welding gun.

[0048] Further, this embodiment can refer to Figure 3 and Figure 4 , also includes another set of first wire nozzle 40, second wire nozzle 41 and quick-release structure 42 and are assembled in the same way. The two sets of devices are respectively arranged at both ends of the welding wire 92, one end is arranged at the wire feeding mechanism, and the other end is arranged at the welding gun, and the middle is connected by a wire feeding tube.

[0049] The two sets of anti-twist structures are arranged back-to-back, that is, the second wire nozzles 41 of the two sets of mechanisms are connected to the two ends of the wire feed tube, and the other ends are respectively fixed to the wire feed mechanism and the welding gun through the two first wire nozzles 40. One set of anti-twist structures is set on the side of the wire feeder. For easy installation, the end of the first wire nozzle 40 can be made into a tapered shape to facilitate snap-in insertion into the mounting hole of the wire feeder; the other set of anti-twist structures is set on the side of the welding gun and can be fixedly installed at the welding gun nozzle. The end of the first wire nozzle 40 is made into a tubular shape, and the outlet matches the welding point.

[0050] In summary, the present invention effectively overcomes various shortcomings in the prior art, can produce beneficial technical effects, and has significant progress.

[0051] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. Welding wire anti-twist device, characterized in that: include: A first wire nozzle (40), a second wire nozzle (41) and a quick-release structure (42), wherein the first wire nozzle (40) and the second wire nozzle (41) are both provided with a wire hole (401), the tail end of the first wire nozzle (40) is rotatably matched with the head end of the second wire nozzle (41), and the quick-release structure (42) is provided on the outer layer of the matching position of the first wire nozzle (40) and the second wire nozzle (41) and limits the first wire nozzle (40) and the second wire nozzle (41) from unexpected relative sliding in the axial direction.

2. The welding wire anti-twisting device according to claim 1, characterized in that: The inner circular surface of the tail end of the first thread nozzle (40) is rotatably engaged with the outer circular surface of the head end of the second thread nozzle (41).

3. The welding wire anti-twisting device according to claim 2, characterized in that: The quick-release structure (42) comprises an elastic member (421), a sliding ring (422) and a locking body (423); The elastic member (421) is annular and is sleeved on the outer circular surface of the tail end of the first wire nozzle (40); The sliding ring (422) is slidably sleeved outside the elastic member (421) and slidably matched with the first wire nozzle (40), and the two ends of the elastic member (421) are respectively in contact with the stepped surfaces of the first wire nozzle (40) and the sliding ring (422); The matching portion of the second wire mouth (41) and the first wire mouth (40) is provided with a locking hole (424) in the radial direction. The locking hole (424) passes through the first wire mouth (40) to form a blind hole on the second wire mouth (41). The locking body (423) is movably arranged in the locking hole (424). The locking hole (424) invades the second wire mouth (41) but does not penetrate the second wire mouth (41). A rotary groove (4110) is provided at a corresponding position on the axis of the second wire mouth (41). The rotary groove (4110) corresponds to the position of the locking hole. The locking body (423) can roll in the rotary groove. A step (4221) is provided on the inner circle of the sliding ring (422). Initially, the elastic member (421) causes the step (4221) to match the position of the locking body (423), and causes the locking body (423) to be embedded in the first wire nozzle (40) and the second wire nozzle (41) at the same time; After the sliding ring (422) overcomes the elastic force and moves, the step (4221) and the locking body (423) are offset from each other, and the locking body (423) is disengaged from the locking hole (424) of the second wire nozzle (41).

4. The welding wire anti-twisting device according to claim 3, characterized in that: The locking holes (424) are distributed in at least two groups axially.

5. The welding wire anti-twisting device according to claim 3, characterized in that: The locking body (423) is a spherical ball.

6. The welding wire anti-twisting device according to claim 3, characterized in that: The second thread nozzle (41) is provided with a limit plate (402) for limiting the sliding range of the sliding ring (422).

7. The welding wire anti-twisting device according to claim 3, characterized in that: An annular retaining spring (403) is provided at the end of the second wire nozzle (41), and the retaining spring (403) protrudes from the outer circumference of the second wire nozzle (41). The retaining spring (403) abuts against the step (4221) on the inner circle of the sliding ring (422), thereby limiting the sliding range on this side.

8. The welding wire anti-twisting device according to claim 1, characterized in that: A spring tube (43) is provided at the end of the second wire nozzle (41), and the welding wire (92) passes through the spring tube (43).

9. The welding wire anti-twisting device according to claim 1, characterized in that: The invention also includes a wire feeder, which includes two sets of driving wheels (431) arranged opposite to each other and a power source (432) for driving one set of the driving wheels (431) to rotate. The first wire nozzle (40) is installed on the housing of the wire feeder. The wire hole (401) of the first wire nozzle (40) is opposite to the center line of the two sets of driving wheels (431). The welding wire (92) passes through the center line of the two sets of driving wheels (431) to obtain power and penetrates the first wire nozzle (40).

10. The welding wire anti-twisting device according to claim 1, characterized in that: It also includes another set of the first wire nozzle (40), the second wire nozzle (41) and the quick-release structure (42) and is assembled in the same manner, with the two sets of devices being respectively arranged at both ends of the welding wire (92).

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