Four-wire feeding structure of laser welding head
By designing the four-wire feed structure of the laser welding joint, the problem of low welding efficiency of single-wire feed structure in thick materials or large gaps is solved, and stable derivation and efficient welding of welding wire are achieved, adapting to different welding conditions.
Patent Information
- Application Number
- CN202422279332.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The single wire feed structure of existing laser welding joints is inefficient when the welding material is thick or the gap span is large, and requires layer by layer to be welded, which affects the operating efficiency.
A four-wire feeding structure of laser welding joints is designed, including a four-wire feeding assembly and a variety of corresponding nozzles and four-wire nozzles. Through the structural design of the wire guide tube and guide part, the stable derivation of the four-wire welding wire is achieved to meet different welding needs.
It improves welding efficiency, avoids welding wire entanglement and offset, and can complete welding of thick materials or large gaps at one time, meeting the needs of special welding conditions.
Smart Images
Figure CN223114372U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of welding, in particular to a four-wire feeding structure of a laser welding head. Background Technique
[0002] Laser welding is an efficient and precise welding method that uses a laser beam with a high energy density as a heat source. Laser welding is an important aspect of the application of laser material processing technology. By controlling parameters such as the width, energy, peak power, and repetition frequency of laser pulses, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts.
[0003] With the continuous development of modern manufacturing, welding technology is increasingly widely used in the industrial field. The laser welding head is an important tool in the laser welding process, and its performance directly affects the laser welding quality and operation efficiency. When the laser welding head operates, it relies on the wire feeding device at the bottom to transport the welding wire to the welding nozzle. At present, the handheld welding laser gun mainly uses a single-wire feeding structure. When encountering welding operations such as thick material welding, large gap spans, or welds that need to be particularly built up, the speed of wire accumulation is slow, and it is necessary for workers to weld layer by layer, reducing the welding efficiency.
[0004] In view of this, the utility model provides a four-wire feeding structure of a laser welding head to solve the technical problems existing in the above-mentioned prior art. Content of the Utility Model
[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a four-wire feeding structure of a laser welding head is proposed.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] A four-wire feeding structure of a laser welding head includes a welding gun. A connecting seat is installed at the front end of the welding gun, and a nozzle assembly is arranged at the front end position of the connecting seat. The nozzle assembly includes a screw joint, a nozzle, and a spray head. The nozzle is installed on the connecting seat through the screw joint. The spray head is pluggably installed at the front end position of the nozzle. A wire feeding fixing frame is installed at the lower position of the connecting seat, and a four-wire feeding assembly is fixedly installed at the bottom of the wire feeding fixing frame. A replaceable four-wire guiding nozzle is fixedly installed at the front end position of the four-wire feeding assembly. A welding wire conveying pipe is fixedly installed at the rear end of the four-wire feeding assembly. A welding wire is arranged inside the four-wire feeding assembly. An X-axis motor mirror group and a focusing mirror group are installed on the gun body part of the welding gun, and a protective cover is installed at the rear end of the gun body part of the welding gun. A QBH joint, a water and gas connection joint, a collimating mirror group, and a button switch are installed on the handle part of the welding gun.
[0008] Preferably, the four wire feeding assemblies include a box body with open structures at both ends, and an adjusting member connected to the wire feeding fixing frame is arranged at the top of the box body. A contraction part for guiding the welding wire to approach the four wire guiding nozzles is arranged at the front end position of the box body, and the four wire guiding nozzles are installed at the front end position of the contraction part.
[0009] Preferably, the four wire feeding assemblies further include four welding wire guiding tubes arranged inside the box body, and the welding wire guiding tubes are made of elastic materials. The front ends of the welding wire guiding tubes are inserted into the ends of the four wire guiding nozzles, and a holding frame for restricting the arrangement of the welding wire guiding tubes is installed at the bottom of the box body.
[0010] Preferably, export holes are arranged in a rectangular distribution at the front end position of the four wire guiding nozzles, and a guiding tube connecting part arranged in a manner matching the arrangement of the export holes is arranged at the rear end position of the four wire guiding nozzles. A guiding part connecting the export holes and the guiding tube connecting part is arranged in the middle of the four wire guiding nozzles.
[0011] Preferably, export holes are arranged in a diamond distribution at the front end position of the four wire guiding nozzles, and a guiding tube connecting part arranged in a manner matching the arrangement of the export holes is arranged at the rear end position of the four wire guiding nozzles. A guiding part connecting the export holes and the guiding tube connecting part is arranged in the middle of the four wire guiding nozzles.
[0012] Preferably, export holes are arranged in a trapezoidal distribution at the front end position of the four wire guiding nozzles, and a guiding tube connecting part arranged in a manner matching the arrangement of the export holes is arranged at the rear end position of the four wire guiding nozzles. A guiding part connecting the export holes and the guiding tube connecting part is arranged in the middle of the four wire guiding nozzles.
[0013] Preferably, the nozzle head includes a fixing part at the upper end and a spraying orifice part at the lower end. A holding frame is arranged at the bottom of the spraying orifice part, and the internal space of the holding frame is adapted to the internal space of the export holes.
[0014] The beneficial effects of the present utility model are as follows:
[0015] 1. The welding wire guiding tubes connect the four wire guiding nozzles and the welding wire conveying tubes. When the welding wire is inside the four wire feeding assemblies, the phenomenon of the welding wire being entangled can be effectively avoided. Secondly, the welding wire guiding tubes are used to guide the welding wire during its movement, straighten the unreeled welding wire, and keep the welding wire exported from the four wire guiding nozzles straight and stable;
[0016] 2. The four wire guiding nozzles are located below the nozzle head. After the welding wire is exported from the four wire guiding nozzles, it passes through the holding frame at the bottom of the nozzle head and contacts the laser. Through the setting of the holding frame, constraints are provided for the movement of the four welding wires, so that the welding wire is exported to the weld according to the design requirements, and the phenomena of the welding wire shifting and spreading are avoided, thereby improving the welding efficiency;
[0017] 3. According to the welding requirements, a variety of corresponding nozzles and four-wire nozzles are designed. Through the structural design of the outlet holes, guiding parts and guiding tube connection parts of the four-wire nozzles, the front ends of the four wire guiding tubes are all inserted into the inside of the guiding tube connection part. The welding wires are guided by the wire guiding tubes and guiding parts, and the four welding wires are exported to the outlet holes in different states to adapt to welding working conditions with different requirements and improve the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 FIG. is a schematic structural diagram of a four-wire feeding structure of a laser welding head proposed by the present utility model;
[0019] Figure 2 FIG. is a partial structural schematic diagram of a four-wire feeding structure of a laser welding head proposed by the present utility model;
[0020] Figure 3 FIG. is a schematic structural diagram of a nozzle assembly of a four-wire feeding structure of a laser welding head proposed by the present utility model;
[0021] Figure 4 FIG. is a schematic structural diagram of a four-wire feeding assembly of a four-wire feeding structure of a laser welding head proposed by the present utility model;
[0022] Figure 5 FIG. is a schematic structural diagram of a wire guiding tube of a four-wire feeding structure of a laser welding head proposed by the present utility model;
[0023] Figure 6 FIG. is a schematic structural diagram of a holder of a four-wire feeding structure of a laser welding head proposed by the present utility model;
[0024] Figure 7 FIG. is a schematic diagram of an outlet hole of a four-wire feeding structure of a laser welding head according to Embodiment 1 of the present utility model;
[0025] Figure 8 FIG. is a schematic diagram of an outlet hole of a four-wire feeding structure of a laser welding head according to Embodiment 2 of the present utility model;
[0026] Figure 9 FIG. is a schematic diagram of an outlet hole of a four-wire feeding structure of a laser welding head according to Embodiment 3 of the present utility model;
[0027] Figure 10 FIG. is a schematic cross-sectional structural diagram of a four-wire nozzle of a four-wire feeding structure of a laser welding head proposed by the present utility model;
[0028] Figure 11 FIG. is a schematic structural diagram of a nozzle of a four-wire feeding structure of a laser welding head proposed by the present utility model;
[0029] Figure 12Schematic diagram of the distribution of the cage and four wire guiding nozzles of a four-wire feeding structure of a laser welding head proposed by the present utility model.
[0030] In the figure: 1 welding torch, 2 push-button switch, 3 connecting seat, 4 screw joint, 5 nozzle pipe, 6 nozzle head, 61 fixing part, 62 jet orifice part, 63 cage, 7 welding wire, 8 four wire guiding nozzles, 81 lead-out hole, 82 guiding part, 83 guiding pipe connecting part, 9 four wire feeding assemblies, 91 box body, 92 shrinking part, 93 adjusting part, 94 holding frame, 95 welding wire guiding pipe, 10 wire feeding fixing frame, 11 welding wire conveying pipe, 12 QBH joint, 13 water-gas connecting joint, 14 collimating lens group, 15 protective cover, 16 X-axis motor mirror group, 17 focusing lens group. Specific embodiments
[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0032] Referring to Figures 1-12 , a four-wire feeding structure of a laser welding head includes a welding torch 1. A connecting seat 3 is installed at the front end of the welding torch 1, and a nozzle pipe assembly is arranged at the front end position of the connecting seat 3. The nozzle pipe assembly includes a screw joint 4, a nozzle pipe 5 and a nozzle head 6. The nozzle pipe 5 is installed on the connecting seat 3 through the screw joint 4, and the nozzle head 6 is pluggably installed at the front end position of the nozzle pipe 5. A wire feeding fixing frame 10 is installed at the lower position of the connecting seat 3, and a four-wire feeding assembly 9 is fixedly installed at the bottom of the wire feeding fixing frame 10. A replaceable four wire guiding nozzle 8 is fixedly installed at the front end position of the four-wire feeding assembly 9, and a welding wire conveying pipe 11 is fixedly installed at the rear end of the four-wire feeding assembly 9. A welding wire 7 is arranged inside the four-wire feeding assembly 9.
[0033] Referring to Figures 1-2 , an X-axis motor mirror group 16 and a focusing lens group 17 are installed on the gun body part of the welding torch 1, and a protective cover 15 is installed at the rear end of the gun body part of the welding torch 1. A QBH joint 12, a water-gas connecting joint 13, a collimating lens group 14 and a push-button switch 2 are installed on the handle part of the welding torch 1.
[0034] Referring to Figures 3-6 , the four-wire feeding assembly 9 includes a box body 91 with open structures at both ends, and an adjusting part 93 connected to the wire feeding fixing frame 10 is arranged at the top of the box body 91. A shrinking part 92 for guiding the welding wire 7 to approach the four wire guiding nozzles 8 is arranged at the front end position of the box body 91. The four wire guiding nozzles 8 are installed at the front end position of the shrinking part 92. In the present invention, the welding wire 7 enters the inside of the box body 91 through the welding wire conveying pipe 11, and after being collected and guided by the internal space of the box body 91, it is led out from the front end of the four wire guiding nozzles 8.
[0035] Referring to Figure 5And 6 Moreover, the four wire feeding assemblies 9 further include four wire guiding tubes 95 disposed inside the box body 91. The wire guiding tubes 95 are made of an elastic material. The front end of the wire guiding tube 95 is inserted into the end of the four-wire nozzle 8, and a holding frame 94 for restricting the arrangement of the wire guiding tubes 95 is installed at the bottom of the box body 91. In the present invention, the wire guiding tubes 95 are connected to the four-wire nozzle 8 and the wire conveying tube 11. When the wire 7 is inside the four wire feeding assemblies 9, the phenomenon that the wire 7 is entangled can be effectively avoided. Secondly, the wire guiding tubes 95 are used to guide the wire 7 during the movement of the wire 7, straighten the unwound wire 7, and keep the wire 7 led out by the four-wire nozzle 8 straight and stable.
[0036] Embodiment 1:
[0037] Referring to Figure 7 and Figure 10 At the front end position of the four-wire nozzle 8, there are export holes 81 arranged in a rectangular distribution, and at the rear end position of the four-wire nozzle 8, there is a guiding tube connection part 83 arranged in cooperation with the export holes 81. In the middle of the four-wire nozzle 8, there is a guiding part 82 connecting the export holes 81 and the guiding tube connection part 83. In this embodiment, the front end positions of the four wire guiding tubes 95 are all inserted into the inside of the guiding tube connection part 83, and the front ends of the four wire guiding tubes 95 are arranged in a rectangular distribution. When the wire 7 passes through the four wire guiding tubes 95, the four strands of wire 7 are guided to be exported in two parallel upper and lower layers. During welding, the wire 7 in the two parallel upper and lower layers is evenly distributed in the weld, increasing the amount of molten wire 7 in the weld. For the welding requirements of special welds with a certain height, the surfacing can be completed in one welding, improving the surfacing speed.
[0038] Embodiment 2:
[0039] Referring to Figure 8 and Figure 10 At the front end position of the four-wire nozzle 8, there are export holes 81 arranged in a diamond distribution, and at the rear end position of the four-wire nozzle 8, there is a guiding tube connection part 83 arranged in cooperation with the export holes 81. In the middle of the four-wire nozzle 8, there is a guiding part 82 connecting the export holes 81 and the guiding tube connection part 83. In this embodiment, the front end positions of the four wire guiding tubes 95 are all inserted into the inside of the guiding tube connection part 83, and the front ends of the four wire guiding tubes 95 are arranged in a diamond distribution. When the wire 7 passes through the four wire guiding tubes 95, the four strands of wire 7 are guided to be exported in three upper, middle and lower layers. During welding, the wire 7 in the three upper, middle and lower layers is distributed in the weld, and the wire 7 in the lower layer extends into the inside of the weld, quickly filling the weld gap. For the welding operation of thick workpieces, there is no need for layer-by-layer surfacing, improving the welding speed.
[0040] Embodiment 3:
[0041] Referring to Figure 9 and Figure 10, at the front end position of the four-wire nozzle 8, there are lead-out holes 81 arranged in a trapezoidal distribution, and at the rear end position of the four-wire nozzle 8, there is a guiding tube connection part 83 arranged in cooperation with the lead-out holes 81. In the middle of the four-wire nozzle 8, there is a guiding part 82 connecting the lead-out holes 81 and the guiding tube connection part 83. In this embodiment, the front end positions of the four wire guiding tubes 95 are all inserted into the inside of the guiding tube connection part 83, and the front ends of the four wire guiding tubes 95 are distributed in a trapezoidal shape. When the welding wires 7 pass through the four wire guiding tubes 95, the four strands of welding wires 7 are guided to be exported in two parallel upper and lower layers. The four strands of welding wires 7 are distributed in a trapezoidal shape to increase the distribution width. For welding workpieces with a large span, the welding can be completed at one time, improving the welding speed.
[0042] Refer to Figure 11 and Figure 12 , the spray head 6 includes a fixing part 61 at the upper end and a spray port part 62 at the lower end. At the bottom of the spray port part 62, there is a cage 63, and the internal space of the cage 63 is adapted to the internal space of the lead-out holes 81. In the present invention, the four-wire nozzle 8 is located below the spray head 6. After the welding wire 7 is led out from the four-wire nozzle 8, it passes through the cage 63 at the bottom of the spray head 6 and contacts the laser. Through the setting of the cage 63, constraints are provided for the movement of the four strands of welding wires 7, so that the welding wires 7 are led to the weld according to the design requirements, avoiding the phenomena of deviation and dispersion of the welding wires 7 and improving the welding efficiency.
[0043] Working principle: According to the welding requirements, select the corresponding four-wire nozzle 8 for installation. During the installation of the four-wire nozzle 8, insert the front end positions of the four wire guiding tubes 95 into the inside of the guiding tube connection part 83; select the spray head 6 corresponding to the four-wire nozzle 8 for installation, and adjust the position between the four-wire nozzle 8 and the spray head 6 through the adjusting part 93 and the wire feeding fixing frame 10, so that the cage 63 corresponds to the lead-out holes 81;
[0044] When the welding wires 7 pass through the four wire guiding tubes 95, the wire guiding tubes 95 are used to guide the welding wires 7 during their movement, straighten the unrolled welding wires 7, and keep the welding wires led out by the four-wire nozzle 8 straight and stable. Moreover, the front ends of the four wire guiding tubes 95 are distributed in a rectangular shape, and the four strands of welding wires 7 are guided to be exported in two parallel upper and lower layers. During welding, the two parallel upper and lower layers of welding wires 7 are evenly distributed in the weld, increasing the amount of molten welding wires 7 in the weld. For the welding requirements of special welds with a certain height, the welding can be completed at one time;
[0045] Or: When the welding wire 7 passes through the four welding wire guiding tubes 95, the welding wire guiding tubes 95 are used to guide the welding wire 7 during its movement, straighten the unwound welding wire 7, and keep the welding wire exported from the four-wire nozzle 8 straight and stable. The front ends of the four welding wire guiding tubes 95 are distributed in a diamond shape, guiding the four strands of welding wire 7 to be exported in upper, middle, and lower layers. During welding, the welding wire 7 distributed in the upper, middle, and lower layers is distributed in the weld seam, and the welding wire 7 in the lower layer extends into the interior of the weld seam, quickly filling the weld gap. For the welding operation of thick workpieces, the welding is completed in one pass;
[0046] Or: When the welding wire 7 passes through the four welding wire guiding tubes 95, the welding wire guiding tubes 95 are used to guide the welding wire 7 during its movement, straighten the unwound welding wire 7, and keep the welding wire exported from the four-wire nozzle 8 straight and stable. The front ends of the four welding wire guiding tubes 95 are distributed in a trapezoidal shape, guiding the four strands of welding wire 7 to be exported in upper, middle, and lower layers, guiding the four strands of welding wire 7 to be exported in upper and lower parallel layers, and the trapezoidal distribution of the four strands of welding wire 7 increases the distribution width. For welding workpieces with a large span, the welding is completed in one pass.
[0047] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.
Claims
1. A four-wire feeding structure for a laser welding head, comprising a welding torch (1). An X-axis motor mirror group (16) and a focusing lens group (17) are installed at the gun body part of the welding torch (1), and a protective cover (15) is installed at the rear end of the gun body part of the welding torch (1). A QBH connector (12), a water-gas connection joint (13), a collimating lens group (14) and a button switch (2) are installed at the handle part of the welding torch (1), characterized in that, A connecting seat (3) is installed at the front end of the welding torch (1), and a nozzle assembly is arranged at the front end position of the connecting seat (3). The nozzle assembly includes a screw joint (4), a nozzle (5) and a nozzle head (6). The nozzle (5) is installed on the connecting seat (3) through the screw joint (4). The nozzle head (6) is inserted and installed at the front end position of the nozzle (5). A wire feeding fixing frame (10) is installed at the lower position of the connecting seat (3), and a four-wire feeding assembly (9) is fixedly installed at the bottom of the wire feeding fixing frame (10). A replaceable four-wire guiding nozzle (8) is fixedly installed at the front end position of the four-wire feeding assembly (9). A wire feeding pipe (11) is fixedly installed at the rear end of the four-wire feeding assembly (9). A welding wire (7) is arranged inside the four-wire feeding assembly (9).
2. The four-wire feeding structure of a laser welding head according to claim 1, wherein The four-wire feeding assembly (9) includes a box body (91) with open structures at both ends, and an adjusting part (93) connected to the wire feeding fixing frame (10) is arranged at the top of the box body (91). A constriction part (92) for guiding the welding wire (7) to approach the four-wire guiding nozzle (8) is arranged at the front end position of the box body (91). The four-wire guiding nozzle (8) is installed at the front end position of the constriction part (92).
3. The four-wire feeding structure of a laser welding head according to claim 2, wherein, The four-wire feeding assembly (9) further includes four wire guiding pipes (95) arranged inside the box body (91). The wire guiding pipes (95) are made of elastic material. The front ends of the wire guiding pipes (95) are inserted into the ends of the four-wire guiding nozzle (8), and a holding frame (94) for restricting the arrangement of the wire guiding pipes (95) is installed at the bottom of the box body (91).
4. A four-wire feeding structure of a laser welding head according to claim 3, characterized in that, Rectangularly distributed wire outlet holes (81) are arranged at the front end position of the four-wire guiding nozzle (8), and a guiding pipe connecting part (83) arranged in cooperation with the wire outlet holes (81) is arranged at the rear end position of the four-wire guiding nozzle (8). A guiding part (82) connecting the wire outlet holes (81) and the guiding pipe connecting part (83) is arranged in the middle of the four-wire guiding nozzle (8).
5. A four-wire feeding structure of a laser welding head according to claim 3, characterized in that Diamond-shaped distributed wire outlet holes (81) are arranged at the front end position of the four-wire guiding nozzle (8), and a guiding pipe connecting part (83) arranged in cooperation with the wire outlet holes (81) is arranged at the rear end position of the four-wire guiding nozzle (8). A guiding part (82) connecting the wire outlet holes (81) and the guiding pipe connecting part (83) is arranged in the middle of the four-wire guiding nozzle (8).
6. The four-wire feeding structure of a laser welding head according to claim 3, wherein Trapezoidally distributed wire outlet holes (81) are arranged at the front end position of the four-wire guiding nozzle (8), and a guiding pipe connecting part (83) arranged in cooperation with the wire outlet holes (81) is arranged at the rear end position of the four-wire guiding nozzle (8). A guiding part (82) connecting the wire outlet holes (81) and the guiding pipe connecting part (83) is arranged in the middle of the four-wire guiding nozzle (8).
7. A four-wire feeding structure of a laser welding head according to claim 4 or 5 or 6, characterized in that The nozzle head (6) includes a fixing part (61) at the upper end and a jet orifice part (62) at the lower end. A holding frame (63) is arranged at the bottom of the jet orifice part (62), and the internal space of the holding frame (63) is adapted to the internal space of the wire outlet holes (81).