Laser welding wire feeder

Abstract

The utility model relates to a laser welding wire feeder which comprises a wire drawing mechanism and a wire feeding nozzle mechanism which are installed on a laser welding head, the wire drawing mechanism and the wire feeding nozzle mechanism are sequentially arranged at intervals from top to bottom in the height direction of the laser welding head, and the discharging end of the wire drawing mechanism is connected with the feeding end of the wire feeding nozzle mechanism through a first wire feeding pipe. The feeding end of the wire drawing mechanism is connected with the discharging end of the wire feeding disc through the wire feeding pipe set, a welding wire is wound in the wire feeding disc, and the welding wire in the wire feeding disc enters the wire drawing mechanism through the wire feeding pipe set. When the laser welding head is used for welding, the wire drawing mechanism drives a welding wire to enter the wire feeding nozzle mechanism at a constant speed through the first wire feeding pipe, and the wire feeding nozzle mechanism continuously feeds the wire to the laser welding head. The wire drawing mechanism and the wire feeding nozzle mechanism are arranged and can be integrated on the laser welding head to act along with the laser welding head, so that the overall layout can be compact, the wire feeding speed is increased, the wire feeding stability is improved, the welding quality is improved, and the use requirements of laser welding are met.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to a laser welding wire feeder. Background Art

[0002] Laser welding is a fusion welding method that uses a laser beam as energy. It uses a high-energy-density laser beam to impact the weld joint, melting the welds and connecting them together.

[0003] In the prior art, laser welding heads are typically equipped with a wire feeder for feeding the welding wire. A conventional wire feeder consists of a housing, a DC motor, a wire feed roller, a clamping mechanism, a speed regulator, a wire spool, and other components mounted within the housing. The DC motor drives the wire feed roller to rotate, thereby feeding the welding wire. However, conventional wire feeders occupy a large footprint, and due to their long distance from the welding head, they have low wire feed speeds and poor feed stability, making them unsuitable for laser welding. This results in uneven weld quality and makes it impossible to meet the requirements of subsequent hot forming and stamping processes for the welded parts. Utility Model Content

[0004] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a laser welding wire feeder. By setting up a wire drawing mechanism and a wire feeding nozzle mechanism, it can be integrated into the laser welding head and move with the laser welding head, thereby achieving a compact overall layout, increasing the wire feeding speed and wire feeding stability, improving the welding quality, and meeting the use requirements of laser welding.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A laser welding wire feeder comprises a wire drawing mechanism and a wire feeding nozzle mechanism mounted on a laser welding head, wherein the wire drawing mechanism and the wire feeding nozzle mechanism are sequentially spaced from top to bottom along the height direction of the laser welding head, and a discharge end of the wire drawing mechanism is connected to a feed end of the wire feeding nozzle mechanism via a first wire feeding tube;

[0007] The feeding end of the wire drawing mechanism is connected to the discharging end of the wire feeding reel through a wire feeding tube assembly, the welding wire is wound inside the wire feeding reel, and the welding wire inside the wire feeding reel enters the wire drawing mechanism through the wire feeding tube assembly;

[0008] When the laser welding head is welding, the wire drawing mechanism drives the welding wire to enter the wire feeding nozzle mechanism at a uniform speed through the first wire feeding tube, and continuously feeds the wire to the laser welding head through the wire feeding nozzle mechanism.

[0009] As a further improvement of the above technical solution:

[0010] The end of the welding wire sent out through the wire feeding nozzle mechanism coincides with the focus of the laser beam of the laser welding head.

[0011] The structure of the wire drawing mechanism is as follows: it includes a first mounting seat, the first mounting seat is equipped with a laser welding head through a first connecting plate, the top of the first mounting seat is equipped with a guide tube, the bottom of the first mounting seat is equipped with a guide sleeve, and the middle portions of the guide tube, the first mounting seat and the guide sleeve are all provided with through holes, and the through holes are used to pass the welding wire;

[0012] A second mounting seat is mounted on the top of the first mounting seat, a servo motor is fixed on the second mounting seat, an output end of the servo motor is connected to a driving wheel, an outer circumferential surface of the driving wheel is provided with grooves arranged along the circumference, a driven wheel is rotatably mounted on the second mounting seat, and the outer circumferential surface of the driven wheel is arranged to correspond to and fit with the outer circumferential surface of the driving wheel;

[0013] The top of the second mounting seat is also equipped with a feed pipe, and the feed pipe and the guide pipe are arranged concentrically and spaced apart in the axial direction;

[0014] When the wire drawing mechanism pulls the welding wire, the welding wire passes through the feed tube and the through hole at the same time, so that the welding wire is stuck in the groove, and then the servo motor drives the driving wheel to rotate and drives the welding wire to move.

[0015] The second mounting seat is equipped with a guide ball, which is arranged above the driving wheel and the driven wheel.

[0016] The structure of the wire feed nozzle mechanism is as follows: it includes a first connecting seat, the first connecting seat is matched with the laser welding head through a second connecting plate, a first linear module is fixed to the bottom of the first connecting seat, the output end of the first linear module is connected to the second linear module, and the output end of the second linear module is connected to the third linear module through the second connecting seat, and the second connecting seat is L-shaped, so that the second linear module and the third linear module are arranged perpendicular to each other;

[0017] The output end of the third linear module is connected to the mounting plate, and the mounting plate is provided with a mounting end surface extending outward and arranged obliquely. A wire feeding inner core is equipped on the mounting end surface, and a wire feeding passage is opened inside the wire feeding inner core. The wire feeding passage is perpendicular to the mounting end surface, and the wire feeding passage is used to pass the welding wire.

[0018] The wire feeding inner core is equipped with an air pipe joint, and the air pipe joint is used to connect an external protective gas source. The external protective gas source introduces protective gas into the wire feeding passage through the air pipe joint.

[0019] The outside of the wire feeding inner core is equipped with an outer cover, and the outer cover is fixed on the mounting plate.

[0020] The welding wire is an alloy welding wire with a diameter of 1.0 mm or 1.2 mm.

[0021] The welding wire adopts Fe material, including C, Mn, Ni, Cr, and Cu elements. Calculated by mass fraction, the C content is 0.2%-0.6%, the Mn content is 1.0%-3.1%, the Ni content is 0.2%-5.0%, the Cr content is 1.0%-4.0%, and the Cu content is 0.2%-1.5%.

[0022] A wire pushing device is provided between the feeding end of the wire drawing mechanism and the wire feeding disc.

[0023] The beneficial effects of the utility model are as follows:

[0024] The utility model has a compact and reasonable structure and is easy to operate. By setting a wire drawing mechanism and a wire feeding nozzle mechanism, it can be integrated on the laser welding head and move with the laser welding head, thereby achieving a compact overall layout, increasing the wire feeding speed and wire feeding stability, improving the welding quality, and meeting the use requirements of laser welding.

[0025] The utility model also has the following advantages:

[0026] (1) The present invention can improve wire feeding accuracy and wire feeding stability by adopting a high-precision servo motor.

[0027] (2) In the present invention, by setting the first linear module, the second linear module and the third linear module, the position of the wire feeding core relative to the laser welding head can be adjusted, thereby ensuring that the end of the welding wire sent out by the wire feeding nozzle mechanism coincides with the focus of the laser beam of the laser welding head, thereby improving the welding quality.

[0028] (3) In the present invention, an air pipe joint is provided, which is used to connect an external protective gas source. The external protective gas source introduces protective gas into the wire feeding passage through the air pipe joint, which can ensure the stability of the welding process and improve the welding quality.

[0029] (4) The material used to make the welding wire in the present invention is suitable for welding automobile door ring plates with aluminum silicon coatings, can ensure the strength of the weld, and meet the requirements of the subsequent hot forming and stamping process of the automobile door ring plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of the present utility model.

[0031] Figure 2 for Figure 1 main view.

[0032] Figure 3 It is a structural schematic diagram of the wire drawing mechanism in the utility model.

[0033] Figure 4 for Figure 3 Main view (partial).

[0034] Figure 5 It is a structural diagram of the wire feeding nozzle mechanism in the utility model.

[0035] Figure 6 for Figure 5 Front view (welding wire omitted).

[0036] Figure 7 for Figure 6 Cross-sectional view of section AA.

[0037] Among them: 1. Wire drawing mechanism; 2. Wire feeding nozzle mechanism; 3. Laser welding head; 4. Wire pushing device; 5. Wire feeding reel; 6. First wire feeding tube; 7. Second wire feeding tube; 8. Third wire feeding tube; 9. Welding wire;

[0038] 101. First mounting seat; 102. Second mounting seat; 103. Servo motor; 104. First connecting plate; 105. Guide tube; 106. Guide sleeve; 107. Driving wheel; 108. Driven wheel; 109. Feeding tube; 110. Guide ball;

[0039] 201. First connecting seat; 202. Second connecting seat; 203. First linear module; 204. Second linear module; 205. Third linear module; 206. Mounting plate; 207. Second connecting plate; 208. Air pipe joint; 209. Outer cover; 210. Wire feeding inner core; 211. Wire feeding passage. DETAILED DESCRIPTION

[0040] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0041] The structure and functions of this utility model are as follows:

[0042] like Figure 1-Figure 7 As shown, a laser welding wire feeder includes a wire drawing mechanism 1 and a wire feeding nozzle mechanism 2 mounted on a laser welding head 3. The wire drawing mechanism 1 and the wire feeding nozzle mechanism 2 are arranged in sequence from top to bottom along the height direction of the laser welding head 3. The discharge end of the wire drawing mechanism 1 is connected to the feed end of the wire feeding nozzle mechanism 2 via a first wire feeding tube 6. The feed end of the wire drawing mechanism 1 is connected to the discharge end of the wire feeding reel 5 via a wire feeding tube assembly. The wire feeding reel 5 is wound with welding wire 9, and the welding wire 9 inside the wire feeding reel 5 enters the wire drawing mechanism 1 through the wire feeding tube assembly. When the laser welding head 3 is welding, the wire drawing mechanism 1 drives the welding wire 9 to enter the wire feeding nozzle mechanism 2 at a uniform speed through the first wire feeding tube 6, and the wire is continuously fed to the laser welding head 3 through the wire feeding nozzle mechanism 2. By providing the wire drawing mechanism 1 and the wire feeding nozzle mechanism 2, they can be integrated into the laser welding head 3 and move with the laser welding head 3, thereby achieving a compact overall layout, improving the wire feeding speed and the poor wire feeding stability, and being suitable for laser welding.

[0043] The laser welding wire feeder of the present invention is used on laser tailor welding equipment, is installed beside the laser welding head 3, and is used together with the laser welding head 3 to complete laser filler wire welding.

[0044] The end of the welding wire 9 fed out through the wire feeding nozzle mechanism 2 coincides with the focus of the laser beam of the laser welding head 3. This can improve welding accuracy and welding quality and ensure uniformity of the weld.

[0045] like Figure 3-Figure 4 As shown, the structure of the wire drawing mechanism 1 is as follows: it includes a first mounting seat 101, the first mounting seat 101 is equipped with a laser welding head 3 through a first connecting plate 104, the top of the first mounting seat 101 is equipped with a guide tube 105, the bottom of the first mounting seat 101 is equipped with a guide sleeve 106, the middle of the guide tube 105, the first mounting seat 101 and the guide sleeve 106 are simultaneously provided with a through hole, and the through hole is used to pass the welding wire 9; the top of the first mounting seat 101 is equipped with a second mounting seat 102, the second mounting seat 102 is fixed with a servo motor 103, the output end of the servo motor 103 is connected to the driving wheel 107 is connected, and the outer circumference of the driving wheel 107 is provided with grooves arranged along the circumference. A driven wheel 108 is rotatably mounted on the second mounting seat 102, and the outer circumference of the driven wheel 108 is arranged to correspond to the outer circumference of the driving wheel 107. A feed pipe 109 is also installed on the top of the second mounting seat 102. The feed pipe 109 and the guide tube 105 are arranged concentrically and spaced apart in the axial direction. When the wire drawing mechanism 1 draws the welding wire 9, the welding wire passes through the feed pipe 109 and the through hole at the same time, so that the welding wire 9 is stuck in the groove, and then the servo motor 103 drives the driving wheel 107 to rotate, driving the welding wire 9 to move. The wire drawing mechanism 1 is used to provide traction; by providing the servo motor 103, the wire feeding accuracy and wire feeding stability can be improved.

[0046] In addition, the driving wheel 107 and the servo motor 103 are detachably assembled, and the driven wheel 108 and the second mounting seat 102 are detachably assembled, so as to be compatible with welding wires 9 of different diameters.

[0047] The second mounting seat 102 is equipped with a guide ball 110 , which is arranged above the driving wheel 107 and the driven wheel 108 . The guide ball 110 is used to guide and protect the welding wire 9 leaking out between the feed pipe 109 and the guide pipe 105 .

[0048] like Figure 5-Figure 7As shown, the structure of the wire feeding nozzle mechanism 2 is as follows: it includes a first connecting seat 201, the first connecting seat 201 is equipped with the laser welding head 3 through a second connecting plate 207, a first linear module 203 is fixed to the bottom of the first connecting seat 201, the output end of the first linear module 203 is connected to the second linear module 204, and the output end of the second linear module 204 is connected to the third linear module 205 through the second connecting seat 202, and the second connecting seat 202 is L-shaped, so that the second linear module 204 and the third linear module 205 are arranged perpendicular to each other; the output end of the third linear module 205 is connected to the mounting plate 206, and the mounting plate 206 is provided with an outwardly extending and inclined mounting end face, and a wire feeding core 210 is equipped on the mounting end face, and a wire feeding passage 211 is opened inside the wire feeding core 210, and the wire feeding passage 211 is perpendicular to the mounting end face, and the wire feeding passage 211 is used to pass the welding wire 9. In the present invention, the first linear module 203 drives the second linear module 204 to perform linear motion along the horizontal X direction, the second linear module 204 drives the third linear module 205 to perform linear motion along the horizontal Y direction, and the third linear module 205 drives the mounting plate 206 to perform linear motion along the vertical direction, thereby adjusting the position of the wire feeding core 210 relative to the laser welding head 3, thereby ensuring that the end of the welding wire 9 delivered by the wire feeding nozzle mechanism 2 coincides with the laser beam focus of the laser welding head 3, thereby improving the welding quality.

[0049] The wire feeding core 210 is equipped with a gas pipe connector 208 for connecting to an external shielding gas source, which feeds shielding gas into the wire feeding passage 211 through the gas pipe connector 208. The shielding gas is argon, which can ensure a stable welding process and improve welding quality.

[0050] The outer portion of the wire feeding inner core 210 is equipped with an outer cover 209 , which is fixed to the mounting plate 206 . The outer cover 209 is used to protect the wire feeding inner core 210 .

[0051] In the present invention, the welding wire 9 is an alloy welding wire, and the diameter of the welding wire 9 is 1.0mm or 1.2mm. The 1.0mm welding wire is used to weld the automobile door ring plate with a thickness of 1.8mm, and the 1.2mm welding wire is used to weld the automobile door ring plate with a thickness of 2.2mm.

[0052] Furthermore, the welding wire 9 is made of Fe and contains C, Mn, Ni, Cr, and Cu. By mass, the C content is 0.2%-0.6%, the Mn content is 1.0%-3.1%, the Ni content is 0.2%-5.0%, the Cr content is 1.0%-4.0%, and the Cu content is 0.2%-1.5%. This makes it suitable for welding aluminum-silicon-coated automotive door rings, ensuring weld strength that meets the requirements of subsequent hot forming and stamping processes.

[0053] In the present utility model, the wire feeding reel 5 can be wound with welding wire 9 in the weight range of 5KG-20KG, and the wire feeding reel 5 can be directly connected with the wire drawing mechanism 1; alternatively, a wire pushing device 4 can be installed between the feeding end of the wire drawing mechanism 1 and the wire feeding reel 5. In this case, the wire feeding tube group includes a second wire feeding tube 7 and a third wire feeding tube 8. The second wire feeding tube 7 is used to connect the feeding end of the wire drawing mechanism 1 and the discharging end of the wire pushing device 4, and the third wire feeding tube 8 is used to connect the feeding end of the wire pushing device 4 and the discharging end of the wire feeding reel 5.

[0054] The wire pushing device 4 is used to pull the welding wire 9 out of the wire feeding reel 5 to reduce the resistance of the wire drawing mechanism 1 in pulling the welding wire 9;

[0055] The wire pushing device 4 and the wire feeding reel 5 are not integrated on the laser welding head 3. The wire pushing device 4 and the wire feeding reel 5 can be arranged above the laser welding head 3 through a support frame, or can be placed a few meters away from the equipment. The distance from the wire pushing device 4 to the wire drawing mechanism 1 can range from 0.5 meters to 10 meters. Through electrical control, the wire feeding speed of the wire pushing device 4 is equal to the wire feeding speed of the wire drawing mechanism 1, thereby achieving a stable wire feeding effect.

[0056] The working process of this utility model is as follows:

[0057] The laser welding wire feeder of the present invention is installed on a linear laser tailor welding line. The light output power of the laser welding head 3 is 5600W, and the length of the weld to be processed is 500mm.

[0058] First, manually thread the welding wire 9, passing the welding wire 9 in the wire feeding reel 5 through the third wire feeding tube 8, the wire pushing device 4, the second wire feeding tube 7, the feeding tube 109, the groove between the driving wheel 107 and the driven wheel 108, the through hole of the wire drawing mechanism 1 (corresponding to the guide tube 105, the first mounting seat 101 and the guide sleeve 106 of the wire drawing mechanism 1), the first wire feeding tube 6, and the wire feeding passage 211 of the wire feeding nozzle mechanism 2 in sequence;

[0059] The position of the wire feeding core 210 relative to the laser welding head 3 is adjusted by the first linear module 203, the second linear module 204 and the third linear module 205 to ensure that the welding wire 9 extending from the wire feeding core 210 can accurately fall on the weld seam and coincide with the focus of the laser beam of the laser welding head 3;

[0060] After the adjustment is completed, the wire pushing device 4 and the servo motor 103 are started at the same time. The servo motor 103 drives the driving wheel 107 to rotate at a constant speed. The inner wall surface of the groove of the driving wheel 107 and the outer circumference surface of the driven wheel 108 are in contact with the outer wall surface of the welding wire 9 at the same time, thereby driving the welding wire 9 to be continuously and stably transported forward along its threading direction.

[0061] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A laser welding wire feeder, characterized by: The invention comprises a wire drawing mechanism (1) and a wire feeding nozzle mechanism (2) installed on a laser welding head (3), wherein the wire drawing mechanism (1) and the wire feeding nozzle mechanism (2) are sequentially arranged at intervals from top to bottom along the height direction of the laser welding head (3), and the discharge end of the wire drawing mechanism (1) and the feed end of the wire feeding nozzle mechanism (2) are connected via a first wire feeding tube (6); The feed end of the wire drawing mechanism (1) is connected to the discharge end of the wire feeding reel (5) through a wire feeding tube assembly, the inside of the wire feeding reel (5) is wound with welding wire (9), and the welding wire (9) inside the wire feeding reel (5) enters the wire drawing mechanism (1) through the wire feeding tube assembly; When the laser welding head (3) is welding, the wire drawing mechanism (1) drives the welding wire (9) to enter the wire feeding nozzle mechanism (2) at a uniform speed through the first wire feeding tube (6), and continuously feeds the wire to the laser welding head (3) through the wire feeding nozzle mechanism (2).

2. A laser welding wire feeder according to claim 1, characterized in that: The end of the welding wire (9) fed out through the wire feeding nozzle mechanism (2) coincides with the focus of the laser beam of the laser welding head (3).

3. The laser welding wire feeder according to claim 1, characterized in that: The structure of the wire drawing mechanism (1) is as follows: it includes a first mounting seat (101), the first mounting seat (101) is equipped with a laser welding head (3) through a first connecting plate (104), the top of the first mounting seat (101) is equipped with a guide tube (105), the bottom of the first mounting seat (101) is equipped with a guide sleeve (106), and the middle parts of the guide tube (105), the first mounting seat (101) and the guide sleeve (106) are simultaneously provided with through holes, and the through holes are used to pass the welding wire (9); A second mounting seat (102) is mounted on the top of the first mounting seat (101), a servo motor (103) is fixed on the second mounting seat (102), an output end of the servo motor (103) is connected to a driving wheel (107), an outer circumferential surface of the driving wheel (107) is provided with grooves arranged along the circumference, a driven wheel (108) is rotatably mounted on the second mounting seat (102), and the outer circumferential surface of the driven wheel (108) is arranged to correspond to and fit the outer circumferential surface of the driving wheel (107); The top of the second mounting seat (102) is also equipped with a feed pipe (109), and the feed pipe (109) and the guide pipe (105) are arranged concentrically and spaced apart in the axial direction; When the wire drawing mechanism (1) pulls the welding wire (9), the welding wire passes through the feed tube (109) and the through hole at the same time, so that the welding wire (9) is stuck in the groove, and then the servo motor (103) drives the driving wheel (107) to rotate, driving the welding wire (9) to move.

4. A laser welding wire feeder according to claim 3, characterized in that: The second mounting seat (102) is equipped with a guide ball (110), and the guide ball (110) is arranged above the driving wheel (107) and the driven wheel (108).

5. The laser welding wire feeder according to claim 1, characterized in that: The structure of the wire feeding nozzle mechanism (2) is as follows: comprising a first connecting seat (201), the first connecting seat (201) being assembled with the laser welding head (3) via a second connecting plate (207), a first linear module (203) being fixed to the bottom of the first connecting seat (201), an output end of the first linear module (203) being connected to a second linear module (204), an output end of the second linear module (204) being connected to a third linear module (205) via a second connecting seat (202), and the second connecting seat (202) being L-shaped, so that the second linear module (204) and the third linear module (205) are arranged perpendicular to each other; The output end of the third linear module (205) is connected to a mounting plate (206), and the mounting plate (206) is provided with a mounting end face that extends outward and is arranged obliquely. A wire feeding core (210) is mounted on the mounting end face, and a wire feeding passage (211) is provided inside the wire feeding core (210). The wire feeding passage (211) is perpendicular to the mounting end face, and the wire feeding passage (211) is used for passing the welding wire (9).

6. A laser welding wire feeder according to claim 5, characterized in that: The wire feeding inner core (210) is equipped with an air pipe joint (208), and the air pipe joint (208) is used to connect an external protective gas source, and the external protective gas source introduces protective gas into the wire feeding passage (211) through the air pipe joint (208).

7. The laser welding wire feeder according to claim 5, characterized in that: The outside of the wire feeding inner core (210) is equipped with an outer cover (209), and the outer cover (209) is fixed on the mounting plate (206).

8. The laser welding wire feeder according to claim 1, characterized in that: The welding wire (9) is an alloy welding wire, and the diameter of the welding wire (9) is 1.0 mm or 1.2 mm.

9. A laser welding wire feeder according to claim 8, characterized in that: The welding wire (9) is made of Fe material, including C, Mn, Ni, Cr, and Cu elements, wherein, by mass fraction, the C content is 0.2%-0.6%, the Mn content is 1.0%-3.1%, the Ni content is 0.2%-5.0%, the Cr content is 1.0%-4.0%, and the Cu content is 0.2%-1.5%.

10. The laser welding wire feeder according to claim 1, characterized in that: A wire pushing device (4) is installed between the feeding end of the wire drawing mechanism (1) and the wire feeding disc (5).

Images