Welding head module and laser welding device

Abstract

The utility model relates to the technical field of laser welding, in particular to a welding head module and a laser welding device. The welding head module comprises a welding head fixing seat, a welding nozzle assembly, a wire clamp assembly and a cutter assembly, and the welding head fixing seat is used for being connected with a driving assembly of the laser welding device; the welding nozzle assembly is arranged on the welding head fixing base and comprises a welding nozzle, and a laser channel is formed in the welding nozzle and used for allowing a laser beam to penetrate through so that a metal wire located on the light emitting side of the welding nozzle can be welded and fixed to a to-be-welded part; the wire clamp assembly is arranged on the welding head fixing base and comprises a wire guide nozzle and a wire clamp, the wire guide nozzle is arranged on one side of the welding nozzle and used for guiding a metal wire to the light emitting side of the welding nozzle, and the wire clamp can move relative to the wire guide nozzle so as to be matched with the wire guide nozzle to clamp the metal wire; the cutter assembly is fixedly connected with the welding head fixing base and comprises a cutter, the cutter is arranged on the side, away from the wire guide nozzle, of the welding nozzle, and the cutter can move towards the light emitting side of the welding nozzle so as to cut off the metal wire.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser welding technical field, concretely relates to a welding head module and laser welding device. BACKGROUND

[0002] In the field of microelectronic packaging and semiconductor manufacturing, it is often necessary to connect metal wires with substrates to ensure effective transmission of current and signals. Ultrasonic welding connection is a widely used technology. Ultrasonic connection utilizes high-frequency vibration energy to promote the bonding between the molecules of the metal wire and the substrate surface. The friction heat generated by this high-frequency vibration causes the metal wire to plastically deform and mechanically interlock with the substrate, while atomic-level diffusion occurs at the interface, thereby creating a strong electrical and mechanical connection.

[0003] However, for some metal wires with hard material or thick thickness, it is not easy for them to undergo significant plastic deformation under external force, which makes it difficult for ultrasonic energy to be effectively transmitted to the connection interface, resulting in insufficient connection strength. SUMMARY

[0004] The utility model mainly solves the problem of insufficient connection strength of metal wires with hard material or thick thickness.

[0005] According to a first aspect, in an embodiment, a welding head module is provided, comprising a welding head fixing seat, a welding nozzle assembly, a wire clamp assembly, and a cutter assembly. The welding head fixing seat is used to connect with the driving assembly of a laser welding device. The welding nozzle assembly is arranged on the welding head fixing seat. The welding nozzle assembly includes a welding nozzle, and a laser channel is arranged on the welding nozzle. The laser channel is used for the laser beam to pass through, so as to weld and fix the metal wire on the light-emitting side of the welding nozzle with the workpiece to be welded. The wire clamp assembly is arranged on the welding head fixing seat. The wire clamp assembly includes a wire guide nozzle and a wire clamp. The wire guide nozzle is arranged on one side of the welding nozzle and is used to guide the metal wire to the light-emitting side of the welding nozzle. The wire clamp is movable relative to the wire guide nozzle to clamp the metal wire in cooperation with the wire guide nozzle. The cutter assembly is fixedly connected with the welding head fixing seat. The cutter assembly includes a cutter. The cutter is arranged on the side of the welding nozzle away from the wire guide nozzle. The cutter can move towards the light-emitting side of the welding nozzle to cut off the metal wire.

[0006] In some embodiments, the welding nozzle assembly includes a welding nozzle support. The welding nozzle is arranged on the welding nozzle support. The welding nozzle support is elastically connected with the welding head fixing seat, so that the welding nozzle can float in the direction of the laser channel relative to the welding head fixing seat.

[0007] In some embodiments, the welding tip assembly comprises a first elastic sheet, one end of the first elastic sheet is connected to the welding tip holder, and the other end of the first elastic sheet is connected to the welding head fixing base.

[0008] In some embodiments, the welding tip holder is a rectangular welding tip holder, and four first elastic sheets are arranged at four corners of the rectangular welding tip holder.

[0009] In some embodiments, the welding tip assembly comprises a plurality of pressing blocks and fasteners, one end of the first elastic sheet is located between the pressing block and the welding tip holder, the other end of the first elastic sheet is located between the pressing block and the welding head fixing base, and the fasteners are used to fixedly connect the pressing block with the welding tip holder or the welding head fixing base.

[0010] In some embodiments, the cutter assembly comprises a cutter holder fixing base and a cutter, the cutter holder fixing base is connected to the welding head fixing base, the cutter holder fixing base is provided with an assembly groove, and the cutter is fixed in the assembly groove.

[0011] In some embodiments, the cutter assembly comprises a second elastic sheet, an elastic sheet fixing base, and an adjusting member, the elastic sheet fixing base is fixedly connected to the welding head fixing base, the second elastic sheet is connected between the elastic sheet fixing base and the cutter holder fixing base to enable the cutter holder fixing base to swing relative to the elastic sheet fixing base, and the adjusting member is threadedly connected between the elastic sheet fixing base and the cutter holder fixing base and is used to adjust the position of the cutter holder fixing base relative to the elastic sheet fixing base.

[0012] In some embodiments, an end of the wire guide tip close to the light emitting side is provided with a chamfer, and / or a side of the welding tip close to the wire guide tip is provided with a chamfer.

[0013] In some embodiments, the welding head module comprises a light source assembly, the light source assembly comprises a light source fixing frame and a light source, the light source fixing frame is connected to the welding head fixing base, and the light source is arranged on the light source fixing frame.

[0014] According to a second aspect, in an embodiment, a laser welding device is provided, comprising the welding head module, the driving assembly, the laser assembly, and the wire releasing assembly in any of the above embodiments, the driving assembly is connected to the welding head module to drive the welding head module to move, the laser assembly is used to provide a laser beam, and the wire releasing assembly is used to release a metal wire.

[0015] According to the welding head module in the above embodiment, the wire clamp assembly can guide the metal wire to the light outlet side of the welding nozzle, the welding nozzle is provided with a laser channel, a laser beam passes through the laser channel to irradiate on the metal wire, so that the metal wire is welded and fixed with the workpiece to be welded, and after the welding is completed, the cutter assembly can cut off the metal wire, so as to facilitate the next welding; the laser beam has high energy and is suitable for thick or hard metal. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of an embodiment of the welding head module of the utility model;

[0017] Figure 2 It is a front view of the welding head module in Figure 1

[0018] Figure 3 It is a top view of the welding head module in Figure 1

[0019] Figure 4 It is a position relation diagram of the wire nozzle, the welding nozzle and the cutter of the welding head module in Figure 1

[0020] Figure 5 It is a partial enlarged view in Figure 4

[0021] Figure 6 It is an isolated view of the welding nozzle assembly and the welding head fixing seat of the welding head module in Figure 1

[0022] Figure 7 It is a front view of the welding nozzle assembly and the welding head fixing seat in Figure 6

[0023] Figure 8 It is an isolated view of the welding nozzle assembly in Figure 6

[0024] Figure 9 It is an isolated view of the cutter assembly and the welding head fixing seat of the welding head module in Figure 1

[0025] Figure 10 It is an isolated view of the wire clamp assembly in Figure 9

[0026] Figure 11 It is an isolated view of the light source assembly and the welding head fixing seat of the welding head module in Figure 1

[0027] REFERENCE SIGNS:

[0028] ​​​​​​​​​​1, welding head fixing seat; 2, welding nozzle assembly; 21, welding nozzle; 211, laser channel; 22, welding nozzle support; 221, avoiding hole; 23, first elastic sheet; 24, pressing block; 25, adjusting block; 3, wire clamp assembly; 31, wire nozzle; 32, wire clamp; 4, cutter assembly; 41, cutter; 42, cutter fixing seat; 421, assembly groove; 43, second elastic sheet; 44, elastic sheet fixing seat; 45, adjusting piece; 5, light source assembly; 51, light source fixing frame; 52, annular light source; 53, coaxial light source; 6, protective cover; 7, welding signal detection system; 8, chamfer. DETAILED DESCRIPTION

[0029] The utility model will be described in further detail below through specific implementation mode combined with the drawings. In different implementation modes, similar elements adopt relevant similar element marks. In the following implementation mode, many details are described in order to make the application be better understood. However, the person skilled in the art can easily realize that part of the features can be omitted in different cases or can be replaced by other elements, materials, methods. In some cases, some operations related to the application are not shown or described in the specification, in order to avoid the core part of the application from being overwhelmed by too much description, and for the person skilled in the art, it is not necessary to describe these related operations in detail according to the description in the specification and the general technical knowledge in the art.

[0030] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate way to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that the person skilled in the art can obviously see. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment, and do not mean the necessary sequence, unless otherwise stated that a certain sequence must be followed.

[0031] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0032] Please refer to Figures 1-3 In one embodiment, a welding head module is provided, which includes a welding head fixing seat 1, a welding nozzle assembly 2, a wire clamp assembly 3 and a cutter assembly 4. The welding head fixing seat 1 is used to integrally install the welding nozzle assembly 2, the wire clamp assembly 3, the cutter assembly 4, the light source assembly 5, the protective cover 6 and the welding signal detection system 7, etc.

[0033] The welding head module is one of the components of the laser welding device. Specifically, the laser welding device can further include a driving assembly, a laser assembly, and a wire feeding assembly. The welding head module is connected to the driving assembly through a welding head fixing seat 1. The driving assembly is used to drive the welding head module to move, the laser assembly is used to provide the welding head module with a laser beam required for welding, and the wire feeding assembly is used to provide the welding head module with a wire required for welding.

[0034] Please refer to 4 and Figure 5 The welding nozzle assembly 2 is arranged on the welding head fixing seat 1, and the welding nozzle assembly 2 includes a welding nozzle 21. The welding nozzle 21 is arranged below the welding head fixing seat 1, and the welding nozzle 21 is provided with a through hole communicating upward and downward, that is, a laser channel 211. The laser channel 211 is used for the laser beam to pass through, and plays a role of laser positioning and preventing stray light and reflected light. The laser assembly can be arranged above the welding head fixing seat 1, and the laser beam generated by the laser assembly can reach the welding position through the laser channel 211.

[0035] Please refer to Figure 10 The wire clamp assembly 3 is arranged on the welding head fixing seat 1 and includes a wire guide nozzle 31 and a wire clamp 32. The wire guide nozzle 31 is arranged on one side of the welding nozzle 21 and is used to guide the wire to the light-emitting side of the welding nozzle 21. The light-emitting side is the side where the laser beam is emitted. In this embodiment, the light-emitting side of the welding nozzle 21 is the lower side of the welding nozzle 21. When the wire is located on the light-emitting side, it can be irradiated by the laser beam, so as to realize the welding and fixation of the wire with the welding point. The wire guide nozzle 31 and the wire clamp 32 are arranged in a spaced manner, and a channel for the wire to pass through is formed between the wire guide nozzle 31 and the wire clamp 32. The wire clamp 32 can be driven by the driving unit to swing, so as to clamp or release the wire. Alternatively, the wire clamp 32 can be driven by the driving unit to move towards the wire guide nozzle 31, so as to clamp the wire.

[0036] For example, during the welding process, the wire clamp assembly 3 can release the wire, so that the wire can be pulled out of the wire guide nozzle 31, thereby realizing the connection of two welding points on the substrate. After the welding is completed, the cutter assembly 4 can be moved to the wire cutting position to cut the wire. When the cutting is insufficient, the wire clamp assembly 3 can clamp the wire to tear it off from the cutting position, or when the welding distance is relatively short, a certain arc shape can be welded out.

[0037] The cutter assembly 4 is arranged on the lower side of the welding head fixing seat 1 and is fixedly connected to the welding head fixing seat 1. The cutter assembly 4 includes a cutter 41. The cutter 41 is arranged on the side of the welding nozzle 21 away from the wire guide nozzle 31 and is arranged obliquely relative to the welding nozzle 21. The cutter 41 can move towards the lower side of the welding nozzle 21, thereby cutting the wire located on the light-emitting side of the welding nozzle 21.

[0038] The working process of the welding head module in this embodiment is as follows: the wire clamp assembly 3 guides the metal wire to the lower side of the welding nozzle 21; the welding head fixing seat 1 first drives the welding nozzle 21 to move above the first welding point, and then continues to drive the welding nozzle 21 to move downward and make the metal wire contact with the first welding point; the laser assembly generates a laser beam, and the laser beam reaches the metal wire on the lower side of the welding nozzle 21 through the laser channel 211, thereby welding and fixing the metal wire with the first welding point; then the welding head fixing group moves to the second welding point, which will pull the metal wire out of the wire guide nozzle 31, and then the above welding process is repeated to weld and fix the metal wire with the second welding point; the cutter assembly 4 acts to cut off the metal wire, and the metal wire is connected between the first welding point and the second welding point, and the welding is completed.

[0039] Compared with ultrasonic welding, the energy of the laser beam in the laser welding process is higher, which can be applied to metal wires with relatively thick thickness or relatively high hardness. For example, the welding head module in this embodiment is suitable for welding of copper strips, the welding seam is relatively uniform, and the welding efficiency is relatively high.

[0040] In some embodiments, please refer to Figures 6-8 The welding nozzle assembly 2 includes a welding nozzle support 22, and the welding nozzle 21 is located on the lower side of the welding nozzle support 22. Specifically, the lower end of the welding nozzle support 22 is provided with a clamping structure, and the clamping structure clamps and fixes the welding nozzle 21 through an adjusting block 25. The adjusting block 25 is used to adjust the perpendicularity and centricity of the welding nozzle 21, and can be adjusted forward and backward and rotated. The welding nozzle support 22 is provided with a relief hole 221, which is aligned with the laser channel 211 of the welding nozzle 21 to allow the laser beam to pass through.

[0041] The welding nozzle support 22 is arranged on the inner side of the welding head fixing seat 1 and is elastically connected with the welding head fixing seat 1, so that the welding nozzle 21 can float in the direction of the laser channel 211 relative to the welding head fixing seat 1. Specifically, the welding nozzle support 22 is a rectangular welding nozzle support 22, and the welding nozzle assembly 2 further includes four first elastic sheets 23, which are respectively arranged at the four corners of the rectangular welding nozzle support 22. One end of the first elastic sheet 23 is connected to the welding nozzle support 22, and the other end of the elastic sheet is connected to the welding head fixing seat 1.

[0042] The four first elastic sheets 23 form a moment balance system of a parallelogram structure, so that the welding nozzle 21 is always in a vertical state with the surface of the product to be welded during the welding process, thereby ensuring the welding quality.

[0043] In some embodiments, please refer to Figure 8 The welding nozzle assembly 2 includes a plurality of pressing blocks 24 and fasteners, one end of the first elastic sheet 23 is located between the pressing block 24 and the welding nozzle support 22, the other end of the first elastic sheet 23 is located between the pressing block 24 and the welding head fixing seat 1, and the fastener is used to fixedly connect the pressing block 24 with the welding nozzle support 22 or the welding head fixing seat 1.

[0044] In a specific embodiment, the pressing block 24 can be provided with a fixing hole, and a fastener, such as a bolt, can be used to connect the pressing block 24 with the welding nozzle holder 22 or the welding head fixing seat 1, and the first elastic sheet 23 is fixed between the pressing block 24 and the welding nozzle holder 22 or the welding head fixing seat 1.

[0045] In some embodiments, referring to Figure 9 , the cutter assembly 4 includes a cutter holder fixing seat 42 and a cutter 41, the cutter holder fixing seat 42 is connected with the welding head fixing seat 1, and the cutter holder fixing seat 42 is provided with an assembly groove 421 on the lower side of the cutter holder fixing seat 42, and the cutter 41 is fixed in the assembly groove 421. When the welding head fixing seat 1 moves, the cutter holder fixing seat 42 can be driven to move downward, thereby cutting the metal wire. The assembly groove 421 is arranged on the lower side of the cutter holder fixing seat 42, which facilitates the replacement of the cutter 41.

[0046] The cutter assembly 4 further includes a second elastic sheet 43, an elastic sheet fixing seat 44, and an adjusting member 45. The elastic sheet fixing seat 44 is located on the lower side of the welding head fixing seat 1 and is fixedly connected with the welding head fixing seat 1. The cutter holder fixing seat 42 is located on the lower side of the elastic sheet fixing seat 44 and is connected through the second elastic sheet 43. Specifically, one end of the second elastic sheet 43 is fixed on the cutter holder fixing seat 42, and the other end is fixed on the elastic sheet fixing seat 44, thereby connecting and fixing the cutter holder fixing seat 42 and the elastic sheet fixing seat 44. The second elastic sheet 43 can be deformed, and the degree of deformation of the second elastic sheet 43 can be adjusted through an adjusting screw, thereby adjusting the position of the cutter 41.

[0047] The adjusting member 45 is threadedly connected between the elastic sheet fixing seat 44 and the cutter holder fixing seat 42, and the second elastic sheet 43 is connected on one side of the elastic sheet fixing seat 44 and the cutter holder fixing seat 42. Specifically, the adjusting member 45 can be an adjusting screw. By rotating the adjusting screw, the distance between the cutter holder fixing seat 42 and the elastic sheet fixing seat 44 can be adjusted, thereby allowing the cutter holder fixing seat 42 to have a certain swing relative to the elastic sheet fixing seat 44, and the position of the cutter 41 can be adjusted, so that the cutter 41 can cut the metal wire at the appropriate position.

[0048] In some embodiments, referring to Figure 5 , the wire guide nozzle 31 is provided with a chamfer 8 on the end close to the light emitting side, and the welding nozzle 21 is provided with a chamfer 8 on the side close to the wire guide nozzle 31. The chamfer 8 provided on the wire guide nozzle 31 facilitates guiding the metal wire to the lower side of the welding nozzle 21, and the chamfer 8 provided on the welding nozzle 21 and the chamfer 8 provided on the wire guide nozzle 31 play a role in transition and connection, so that the movement of the metal wire is smoother and less likely to be blocked.

[0049] In other embodiments, only the wire guide nozzle 31 can be provided with a chamfer 8 on the end close to the light emitting side, or only the welding nozzle 21 can be provided with a chamfer 8 on the side close to the wire guide nozzle 31.

[0050] In some embodiments, referring to Figure 11 The welding head module comprises a light source assembly 5, the light source assembly 5 comprises a light source fixing frame 51 and a light source, the light source fixing frame 51 is connected with the welding head fixing seat 1, and the light source is arranged on the light source fixing frame 51. Specifically, the light source assembly 5 can contain a ring-shaped light source 52, a coaxial light source 53, a light path periscope barrel and the like, which can shorten the distance between the welding point and the photographing recognition camera.

[0051] In some embodiments, the welding head module further comprises a protective cover 6, the protective cover 6 is arranged on one side of the welding head fixing seat 1 and connected with the welding head fixing seat 1, and the protective cover 6 is used for protecting the circuit board of the welding head module and avoiding damage. The protective cover 6 can be provided with an electric induction light, so as to prevent the overall assembly from being damaged in the use process, for example, being impacted in the vertical direction.

[0052] The welding head module further comprises a welding signal detection system 7, which triggers a welding instruction through a photoelectric coupling signal, the photoelectric coupling signal is an on-off electric signal, welding is triggered when the electric signal is detected to be connected, and welding is stopped when the electric signal is detected to be disconnected.

[0053] According to the second aspect, in an embodiment, a laser welding device is provided, comprising a welding head module, a driving assembly, a laser assembly and a wire releasing assembly, the driving assembly is connected with the welding head module to drive the welding head module to move; the laser assembly is used for providing a laser beam; and the wire releasing assembly is used for releasing a metal wire. The welding head module has the same structure as the welding head module in any of the above embodiments, and will not be described here.

[0054] The above application of specific examples to the utility model is described, which is only used to help understand the utility model, and does not limit the utility model. For the skilled in the art to which the utility model belongs, according to the idea of the utility model, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A welding head module, characterized by The welding head module comprises: a welding head fixing base for connecting with a driving assembly of a laser welding device; a welding nozzle assembly arranged on the welding head fixing base, the welding nozzle assembly comprising a welding nozzle, a laser channel being arranged on the welding nozzle for a laser beam to pass through so as to weld a wire on an emitting side of the welding nozzle to a workpiece to be welded; a wire clamp assembly arranged on the welding head fixing base, the wire clamp assembly comprising a wire guide nozzle arranged on one side of the welding nozzle and used for guiding the wire to the emitting side of the welding nozzle, and a wire clamp movable relative to the wire guide nozzle to clamp the wire together with the wire guide nozzle; and a cutter assembly fixedly connected with the welding head fixing base, the cutter assembly comprising a cutter arranged on the side of the welding nozzle away from the wire guide nozzle, the cutter being movable towards the emitting side of the welding nozzle to cut off the wire.

2. The welding head module of claim 1, wherein, The welding nozzle assembly comprises a welding nozzle support, the welding nozzle being arranged on the welding nozzle support, the welding nozzle support being elastically connected with the welding head fixing base so that the welding nozzle is capable of floating in the direction of the laser channel relative to the welding head fixing base.

3. The welding head module of claim 2, wherein, The welding nozzle assembly comprises a first elastic sheet, one end of the first elastic sheet being connected to the welding nozzle support, and the other end of the first elastic sheet being connected to the welding head fixing base.

4. The welding head module of claim 3, wherein, The welding nozzle support is a rectangular welding nozzle support, and four first elastic sheets are arranged on four corners of the rectangular welding nozzle support.

5. The welding head module of claim 3, wherein, The welding nozzle assembly comprises a plurality of pressing blocks and fasteners, one end of the first elastic sheet being located between the pressing block and the welding nozzle support, and the other end of the first elastic sheet being located between the pressing block and the welding head fixing base, the fasteners being used for fixedly connecting the pressing blocks with the welding nozzle support or the welding head fixing base.

6. The horn module of claim 2, wherein, The cutter assembly comprises a cutter support fixedly connected with the welding head fixing base, and a cutter fixed in an assembly groove arranged on the cutter support.

7. The welding head module of claim 6, wherein, The cutter assembly comprises a second elastic sheet, an elastic sheet fixing base fixedly connected with the welding head fixing base, and an adjusting member threadedly connected between the elastic sheet fixing base and the cutter support and used for adjusting the position of the cutter support relative to the elastic sheet fixing base.

8. The horn module of claim 1, wherein, An end of the wire guide nozzle close to the emitting side is provided with a chamfer, and / or a side of the welding nozzle close to the wire guide nozzle is provided with a chamfer.

9. The horn module of claim 1, wherein, The welding head module further comprises a light source assembly comprising a light source fixing base fixedly connected with the welding head fixing base, and a light source arranged on the light source fixing base.

10. A laser welding apparatus characterized by comprising: The welding head module further comprises: the welding head module according to any one of claims 1-9; a driving assembly connected with the welding head module to drive the welding head module to move; a laser assembly used for providing a laser beam; A payout assembly for releasing a wire.

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