Multifunctional welding device with precise wire feeding and drawing and laser welding machine

Abstract

This invention belongs to the field of laser welding equipment technology, and provides a multifunctional welding device and laser welding machine with precision wire feeding and drawing. It includes an automatic wire feeding and drawing mechanism and a wire drawing buffer mechanism. The welding wire enters through the wire inlet, is clamped and fed by the automatic wire feeding and drawing mechanism, and then flows out through the wire outlet to the wire drawing buffer mechanism. During the wire feeding process, the wire drawing buffer mechanism collects the tension / displacement signal of the welding wire in real time and feeds this signal back to the controller. The controller adjusts the rotation speed and torque of the drive component in real time to match the wire feeding speed with the welding consumption rate, thereby maintaining a stable tension output to the welding wire by the automatic wire feeding and drawing mechanism. Wire drawing enables automatic adjustment of the wire feeding speed to prevent jamming or wire breakage, ensuring stable molten pool formation and consistent weld quality. It improves efficiency and features high automation and multifunctionality. This solution can be applied to products including, but not limited to, BDUs for new energy vehicles, copper busbars, and relays.

Description

Technical Field

[0001] This invention belongs to the field of laser welding equipment technology, especially in the field of new energy vehicle-related products; moreover,

[0002] Specifically, it involves a welding device and laser welding machine with multiple functions including precision wire feeding and wire drawing. Background Technology

[0003] Laser welding wire is a conductive metal wire welding material that converts light energy into heat energy through laser welding technology. It is mainly used for repairing precision molds. Its working principle is to concentrate light energy instantaneously (0.5-20 milliseconds) to melt the welding wire and the base material. After welding, it is necessary to ensure that the metallographic structure and hardness are consistent with the base material to avoid pinholes or detachment. Laser welding wire can be applied to products in a variety of fields, especially new energy vehicle-related products, such as the BDU (Battery Disconnect Unit) of new energy vehicles, which is the core power distribution and safety protection device in the high-voltage system of new energy vehicles.

[0004] Among the relevant prior art, a Chinese authorized invention patent discloses a device entitled "Worm Gear Reducer Type Wire Feeding Motor Equipment and its Wire Feeding Device and Welding System," with patent publication number CN102075030B. The specific technical solution disclosed is "a worm gear reducer type wire feeding motor equipment, comprising a motor, a power output shaft, and a reduction transmission device connecting the power output shaft and the motor's output shaft, characterized in that: the motor is a flat motor, and the reduction transmission device is a worm gear reducer transmission device; the worm gear reducer transmission device includes a reduction wire drawing box and a cooperating transmission device disposed within the reduction wire drawing box." The patent describes a worm gear and worm assembly, where the worm is connected to the motor output shaft for transmission. The motor output shaft and worm are coaxially and integrally connected, and both are rotatably supported by a reduction wire drawing box via front and rear support bearings. While this patent can extend the service life of the wire feeding motor and device, and improve their dynamic response speed, thus facilitating the dynamic response speed requirements of welding systems with low or even no spatter, its structural limitations during use can lead to technical problems such as wire feeding jamming and wire breakage. This results in unstable weld pool formation and inconsistent weld quality in subsequent laser welding operations.

[0005] Therefore, the present invention provides a multifunctional welding device and laser welding machine with precision wire feeding and wire drawing capabilities. Summary of the Invention

[0006] In view of the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a multifunctional welding device and laser welding machine with precision wire feeding and wire drawing, which has the characteristics of ensuring that the welding wire is fed at a uniform speed along the wire feeding direction without wire feeding jamming or wire breakage.

[0007] This invention provides a multifunctional welding device with precision wire feeding and drawing capabilities, including a welding wire for laser welding; it also includes an automatic wire feeding and drawing mechanism, comprising a wire drawing box, a drive assembly, and a wire feeding and drawing component for feeding the welding wire along the wire feeding direction. The wire drawing box has a cavity, a wire inlet hole at the front end of the cavity, and a wire outlet hole at the rear end of the cavity. The wire feeding and drawing component is rotatably disposed within the cavity and is connected to the drive assembly. A wire drawing buffer mechanism with a control device is also provided for real-time wire drawing and buffering of the welding wire along the wire feeding direction. The wire drawing buffer mechanism is disposed at the rear end of the wire drawing box, and the control device is electrically connected to the drive assembly.

[0008] The welding wire enters through the wire inlet and is clamped and fed by the automatic wire feeding and pulling mechanism before flowing out through the wire outlet to the wire pulling buffer mechanism. During the wire feeding process, the wire pulling buffer mechanism collects the tension / displacement signal of the welding wire in real time and feeds the signal back to the controller. The controller then adjusts the rotation speed and torque of the drive component in real time to match the wire feeding speed with the welding consumption speed, so as to maintain a stable tension output to the welding wire by the automatic wire feeding and pulling mechanism.

[0009] As a preferred technical solution of this invention application, the wire drawing buffer mechanism includes a buffer seat with a buffer cavity, a buffer spring, a buffer rod, and a wire drawing buffer assembly. The buffer seat is detachably disposed on the rear side wall of the wire drawing box along the wire feeding direction. The buffer spring is embedded in the buffer cavity of the buffer seat, and the front and rear ends of the buffer spring are disposed between the wire feeding and drawing assembly and the buffer rod in an abutting manner.

[0010] The wire drawing buffer assembly has a frame plate and at least two sets of buffer sensors arranged at intervals. The frame plate is located at the rear end of the buffer seat, and the two sets of buffer sensors are arranged in the front-rear direction of the frame plate along the wire feeding direction. One end of the buffer rod extends into the buffer cavity of the buffer seat, and the other end extends into the frame plate in a direction parallel to the feeding direction. The control device is electrically connected to the buffer sensors.

[0011] As a preferred technical solution of this invention application, the frame plate includes an upper frame plate and a lower frame plate that are arranged parallel to the wire feeding direction and spaced apart, wherein the front end of the upper frame plate is fixed to the top plane of the buffer seat by screwing, and the rear end of the upper frame plate extends in the rearward direction.

[0012] The front end of the lower frame plate is fixed to the bottom plane of the buffer seat by screwing, and the rear end of the lower frame plate extends in the rearward direction; a hollow area is formed between the upper frame plate and the lower frame plate, and the buffer rod can move in the hollow area along the front-back direction of wire feeding.

[0013] As a preferred technical solution of this invention application, the buffer sensing element includes a pair of front wire-drawing buffer sensors arranged vertically and a pair of rear wire-drawing buffer sensors arranged vertically and a pair of front wire-drawing buffer sensors disposed at the front end of the frame plate, and the pair of rear wire-drawing buffer sensors disposed at the rear end of the frame plate.

[0014] The pair of front wire drawing buffer sensors and the pair of rear wire drawing buffer sensors are electrically connected to the controller.

[0015] As a preferred technical solution of this invention application, the wire feeding and drawing assembly includes a wire feeding and drawing drive main gear, a first wire feeding and drawing drive driven gear, a first wire feeding and drawing wheel, a second wire feeding and drawing drive driven gear, a second wire feeding and drawing wheel, a plurality of wire feeding fastening bolts, a first wire drawing pressure roller and a second wire drawing pressure roller, wherein the wire feeding and drawing drive main gear is fixed on the drive part of the drive assembly;

[0016] The first wire feeding drive driven gear and the second wire feeding drive driven gear are rotatably meshed with the side of the wire feeding drive main gear along the front and rear wire feeding directions, respectively. The first wire feeding wheel is rotatably mounted on the first wire feeding drive driven gear through the corresponding wire feeding fastening bolts, and the second wire feeding wheel is rotatably mounted on the second wire feeding drive driven gear through the corresponding wire feeding fastening bolts. The first wire drawing pressure wheel and the second wire drawing pressure wheel are rotatably mounted in the wire drawing box through the corresponding wire feeding fastening bolts. The first wire drawing pressure wheel is rotatably engaged with the first wire feeding wheel, and the second wire drawing pressure wheel is rotatably engaged with the second wire feeding wheel, so that the welding wire passes through the gap formed between the first wire feeding wheel, the second wire feeding wheel, the first wire drawing pressure wheel, and the second wire drawing pressure wheel and is fed in the wire feeding direction.

[0017] As a preferred technical solution of this invention application, the wire feeding and drawing assembly further includes a guide post with a through hole in the front-back direction. One end of the guide post is embedded in the cavity, and the other end extends away from the drive assembly. The welding wire passes through the through hole of the guide post and extends into the wire drawing buffer mechanism.

[0018] As a preferred technical solution of this invention application, the wire drawing box includes a left side plate, a wire drawing cover, and at least two base plates, all made of metal. The two base plates are alternately and detachably disposed at the bottom of the left side plate, and the wire feeding cover is detachably covered on the side of the left side plate.

[0019] The cavity is formed by the left side seat plate, the wire drawing cover and at least two base plates, and the first wire drawing wheel is rotatably mounted on the base plate at the front end, and the second wire drawing wheel is rotatably mounted on the base plate at the rear end.

[0020] As a preferred technical solution of this invention application, it also includes a wire feeding mechanism, which includes a wire feeding seat with a wire feeding channel, a wire drawing sleeve, and a nut. The wire feeding seat is detachably disposed on the front side wall of the wire drawing box. One end of the wire drawing sleeve is screwed into the wire feeding channel of the wire feeding seat, and the other end is screwed into the nut.

[0021] It also includes a wire drawing pressure roller mechanism, which includes a wire drawing pressure roller buckle that is rotatably disposed in the box cavity, and the wire drawing pressure roller buckle cooperates with the first wire drawing pressure roller and the second wire drawing pressure roller buckle respectively.

[0022] As a preferred technical solution of this invention application, the driving component includes a driving source and a reducer detachably disposed on the side wall of the wire drawing box. The driving source is a micro servo motor, and the reducer is a micro speed reducer.

[0023] The micro servo motor base is mounted on the micro reducer, and the micro servo motor drive shaft passes through the micro reducer and rotatably extends into the housing cavity to connect with the wire feeding and drawing transmission main gear.

[0024] The present invention also provides a laser welding machine, which includes a multifunctional welding device as described above, having precision wire feeding and wire drawing capabilities.

[0025] As described above, the multifunctional welding device and laser welding machine with precision wire feeding and drawing provided by the present invention have the following advantages compared with the prior art:

[0026] The multifunctional welding device of this invention employs a designed automatic wire feeding and pulling mechanism and a wire pulling buffer mechanism. During wire feeding, the wire pulling buffer mechanism collects tension / displacement signals of the welding wire in real time and feeds these signals back to the controller. The controller then adjusts the rotational speed and torque of the drive component in real time to match the wire feeding speed with the welding consumption rate, thereby maintaining a stable tension output to the welding wire by the automatic wire feeding and pulling mechanism. During wire feeding, the wire pulling mechanism automatically adjusts the wire feeding speed to prevent it from being too fast or too slow. This solves the technical problems of wire feeding jamming and wire breakage that occur in existing welding operations, thus contributing to stable molten pool formation and consistent weld quality during laser welding. Furthermore, the automatic wire feeding and pulling mechanism enables automatic wire feeding, improving welding efficiency. The device is characterized by high automation and multifunctionality. The products to which this invention can be applied include, but are not limited to, BDUs for new energy vehicles, copper busbars, and relays.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a perspective view of a multifunctional welding device with precision wire feeding and wire drawing, as described in this invention application, wherein... Figure 1 The arrow in the middle left side indicates the direction of the view, which is defined as front, back, left, and right.

[0030] Figure 2 This is a block diagram of the control structure of a multifunctional welding device with precision wire feeding and wire drawing for this invention application;

[0031] Figure 3 This is an exploded view of the multifunctional welding apparatus with precision wire feeding and wire drawing capabilities, as described in this invention application. Figure 3 The arrow at the bottom right indicates the direction defined as the front, back, left, and right directions of this view. Detailed Implementation

[0032] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0033] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention. Specific structures can be described with reference to the accompanying drawings of the patent application.

[0034] This invention provides a multifunctional welding device with precision wire feeding and wire drawing capabilities. Please refer to [link / reference]. Figures 1 to 2 As shown, in which the ground, with Figure 1 and Figure 2 The front, back, left, and right directions indicated by the center mark define the structural directions described in this invention.

[0035] Example 1

[0036] In this embodiment, please refer to Figures 1 to 3 As shown, the present invention provides a multifunctional welding device with precision wire feeding and wire drawing, including a welding wire 10 for laser welding; it also includes an automatic wire feeding and drawing mechanism 20, which includes a wire drawing box 21, a drive assembly 22, and a wire feeding and drawing assembly 23 for feeding welding wire along the wire feeding direction. The wire drawing box 21 has a box cavity 210, a wire inlet hole 211 disposed at the front end of the box cavity 210, and a wire outlet hole 212 disposed at the rear end of the box cavity 210. The wire feeding and drawing assembly 23 is rotatably disposed in the box cavity 210 and is connected to the drive assembly 22; a wire drawing buffer mechanism 30 with a control device 31 is used for real-time wire drawing and buffering of the welding wire 10 along the wire feeding direction. The wire drawing buffer mechanism 30 is disposed at the rear end of the wire drawing box 21, and the control device is electrically connected to the drive assembly 22.

[0037] The welding wire 10 enters through the wire inlet hole, is clamped and fed by the automatic wire feeding and pulling mechanism 20, and then flows out through the wire outlet hole to the wire pulling buffer mechanism 30. During the wire feeding process, the wire pulling buffer mechanism 30 collects the tension / displacement signal of the welding wire in real time and feeds the signal back to the controller 31. The controller 31 adjusts the rotation speed and torque of the drive component 22 in real time to match the wire feeding speed of the welding wire 10 with the welding consumption speed, so as to maintain a stable tension output by the automatic wire feeding and pulling mechanism 20 to the welding wire 10 and achieve uniform wire feeding.

[0038] It should be noted that the aforementioned control device 31 refers to the control system. The welding wire mentioned in this application generally refers to copper wire, but is not limited to this; other suitable wires may also be used. This invention application's multi-functional welding device with precision wire feeding and drawing capabilities can be applied to the production of various products, including but not limited to the production of new energy vehicle BDUs, copper busbars, relays, and other products.

[0039] Specifically, please refer to Figures 1 to 3 As shown, the wire drawing buffer mechanism 30 includes a buffer seat 32 with a buffer cavity, a buffer spring 33, a buffer rod 34, and a wire drawing buffer assembly 35. The buffer seat 32 is detachably disposed on the rear side wall of the wire drawing box 21 along the wire feeding direction. The buffer spring 33 is embedded in the buffer cavity of the buffer seat 32. The front and rear ends of the buffer spring 33 are disposed between the wire feeding and drawing assembly 35 and the buffer rod 34 in an abutting manner.

[0040] The wire drawing buffer assembly 35 has a frame plate 36 and at least two sets of buffer sensors 37 arranged at intervals. The frame plate 36 is located at the rear end of the buffer seat 32. The two sets of buffer sensors 37 are arranged in the front-rear direction of the frame plate 36 along the wire feeding direction. One end of the buffer rod 34 extends into the buffer cavity of the buffer seat 32, and the other end extends into the frame plate 36 in a direction parallel to the feeding direction. The control device 31 is electrically connected to the buffer sensors 37.

[0041] When using the multi-functional welding device of the present invention, which features precision wire feeding and wire drawing, please combine with... Figures 1 to 3 As shown, the automatic wire feeding and drawing mechanism 30 is activated, causing the drive assembly 22 to start and drive the wire feeding and drawing assembly 23 connected to it to rotate. Then, the rotation of the wire feeding and drawing assembly 23 drives the welding wire 10, which enters through the wire inlet hole 211, to be clamped and fed out through the wire outlet hole 212 to the wire drawing buffer mechanism 30. During this process, the wire drawing buffer mechanism 30 collects the tension / displacement signal of the welding wire in real time and feeds the signal back to the control device 31. The control device 31 adjusts the speed and torque of the drive assembly 22 in real time to match the wire feeding speed of the welding wire 10 with the welding consumption speed. To maintain a stable tension output to the welding wire 10 by the automatic wire feeding and drawing mechanism 30; during the wire feeding process, the wire drawing mechanism can automatically adjust the wire feeding speed if it is too fast or too slow, thus solving the technical problems of wire feeding jamming and wire breakage that occur in welding operations in the prior art, thereby helping to ensure stable molten pool formation and consistent weld quality when the welding wire is used for laser welding operations; at the same time, the automatic wire feeding and drawing mechanism 20 can realize automatic wire feeding and improve the welding operation; the present invention has both wire feeding and wire drawing functions, and therefore has the characteristics of high automation and multi-functionality; specifically, When the rate at which the welding wire 10 is consumed by laser welding exceeds the wire feeding speed (i.e., it is determined to be too fast), the automatic wire feeding and pulling mechanism 30 increases the tension on the welding wire 10, and the wire pulling buffer mechanism 30 pushes the buffer rod 34 to move in the direction of decreasing tension; when the rate at which the welding wire 10 is consumed by laser welding is less than the wire feeding speed (i.e., it is determined to be too slow), the wire pulling buffer mechanism 30 reduces the tension on the welding wire 10, and the buffer rod 34 of the wire pulling buffer mechanism 30 resets under the action of the buffer spring 33; the wire pulling buffer sensor collects the displacement of the buffer rod 34 in real time. The signal is fed back to the control system (the controller); closed-loop speed regulation: the control system (the controller 31) adjusts the speed and torque of the drive component 22 (micro servo motor) in real time according to the tension / displacement signal fed back by the wire drawing buffer sensor of the wire drawing buffer mechanism 30, so that the wire feeding speed matches the rate at which the welding wire 10 is consumed by laser welding, so as to maintain the tension of the welding wire 10 stable; thus, the wire feeding continues stably until the welding process is completed, the drive component 22 (micro servo motor) stops, and the wire feeding action terminates, thus completing one laser welding wire feeding process.

[0042] Please see Figures 1 to 3 As shown, in this embodiment, the frame plate 36 includes an upper frame plate 38 and a lower frame plate 39 that are arranged parallel to the wire feeding direction and spaced apart. The front end of the upper frame plate 38 is fixed to the top plane of the buffer seat 32 by screwing, and the rear end of the upper frame plate 38 extends toward the rear.

[0043] The front end of the lower frame plate 39 is fixed to the bottom plane of the buffer seat 32 by screwing, and the rear end of the lower frame plate 39 extends in the rearward direction; a hollow area 389 is formed between the upper frame plate 38 and the lower frame plate 39, and the buffer rod 34 can move in the hollow area 389 along the front-back direction of wire feeding.

[0044] Please see Figures 1 to 3 As shown, in this embodiment, the buffer sensor 37 includes a pair of front wire drawing buffer sensors 370 arranged vertically and a pair of rear wire drawing buffer sensors 371 arranged vertically and a pair of front wire drawing buffer sensors 370 disposed at the front end of the frame plate 36, and a pair of rear wire drawing buffer sensors 371 disposed at the rear end of the frame plate 36.

[0045] The pair of front wire drawing buffer sensors 370 and the pair of rear wire drawing buffer sensors 371 are electrically connected to the control device. It should be noted that the aforementioned pair of front wire drawing buffer sensors 370 and the pair of rear wire drawing buffer sensors 371 are through-beam photoelectric sensors.

[0046] In this embodiment, the buffer holder 32 is a single piece made of metal and is T-shaped. However, it is not limited to this and the buffer holder 32 can also be designed in other shapes.

[0047] Please see Figures 1 to 3 As shown, in this embodiment, the wire feeding and drawing assembly 23 includes a wire feeding and drawing drive main gear 24, a first wire feeding and drawing drive driven gear 25, a first wire feeding and drawing wheel 26, a second wire feeding and drawing drive driven gear 27, a second wire feeding and drawing wheel 28, a plurality of wire feeding fastening bolts 290, a first wire drawing pressure wheel 291 and a second wire drawing pressure wheel 292, and the wire feeding and drawing drive main gear 24 is fixed on the drive part of the drive assembly 22;

[0048] The first wire feeding drive driven gear 25 and the second wire feeding drive driven gear 27 are rotatably meshed with the side of the wire feeding drive main gear 24 along the front and rear wire feeding directions, respectively. The first wire feeding wheel 26 is rotatably mounted on the first wire feeding drive driven gear 25 through the corresponding wire feeding fastening bolt 290. The second wire feeding wheel 28 is rotatably mounted on the second wire feeding drive driven gear 27 through the corresponding wire feeding fastening bolt 290. The first wire drawing pressure wheel 291 and the second wire drawing pressure wheel 292 are rotatably mounted in the wire drawing box 21 through the corresponding wire feeding fastening bolt 29. The first wire drawing pressure wheel 291 is rotatably engaged with the first wire feeding wheel 26, and the second wire drawing pressure wheel 292 is rotatably engaged with the second wire feeding wheel 28. The welding wire 10 is fed in the wire feeding direction through the gap formed between the first wire feeding wheel 26, the second wire feeding wheel 28, the first wire drawing pressure wheel 291, and the second wire drawing pressure wheel 292.

[0049] Example 2

[0050] Based on Example 1, please refer to Figure 1 and Figure 3 As shown, in this embodiment, the wire feeding and drawing assembly 23 further includes a guide post 230 with a through hole in the front-to-back direction. One end of the guide post 230 is embedded in the cavity 210, and the other end extends away from the drive assembly 22. The welding wire 10 passes through the through hole of the guide post 230 and extends into the wire drawing buffer mechanism 30. The guide post 230 serves two purposes: firstly, it guides the fed welding wire 10; secondly, by setting the guide post 230, the front and rear ends of the buffer spring 33 are positioned between the buffer seat 32 and the guide post 230, providing a retaining action for the buffer spring and preventing its position from shifting, thus facilitating a smoother wire drawing and reset function.

[0051] Please see Figure 1 and Figure 3 As shown, in this embodiment, the wire drawing box 21 includes a left side plate 213, a wire drawing cover 214, and at least two base plates 215, all made of metal. The two base plates 215 are alternately and detachably disposed at the bottom of the left side plate 213, and the wire feeding cover 214 is detachably covered on the side of the left side plate 213.

[0052] The cavity 2 is formed by the left side seat plate 213, the wire drawing cover 214 and at least two base plates 215, and the first wire drawing wheel 26 is rotatably disposed on the base plate 215 at the front end, and the second wire drawing wheel 28 is rotatably disposed on the base plate 215 at the rear end.

[0053] Example 3

[0054] Please see Figures 1 to 3 As shown, in this embodiment, the wire feeding mechanism 40 is also included. The wire feeding mechanism 40 includes a wire feeding seat 41 with a wire feeding channel, a wire drawing sleeve tube 42, and a nut 43. The wire feeding seat 41 is detachably disposed on the front side wall of the wire drawing box 21. One end of the wire drawing sleeve tube 42 is screwed into the wire feeding channel of the wire feeding seat 41, and the other end is screwed into the nut 43.

[0055] It also includes a wire drawing pressure roller mechanism 50, which includes a pressure roller buckle 51 rotatably disposed within the housing cavity 210. The pressure roller buckle 51 cooperates with the first wire drawing pressure roller 291 and the second wire drawing pressure roller buckle 292, respectively. By setting the aforementioned structure, the welding wire 10 is guided and positioned at its front end, ensuring a more uniform wire feeding speed without deviation or displacement, thus facilitating a smoother dual-function operation of wire feeding and drawing.

[0056] Please see Figure 3 As shown, in this embodiment, the drive assembly 22 includes a drive source and a reducer detachably disposed on the side wall of the wire drawing box. The drive source is a micro servo motor 220, and the reducer is a micro reducer 221.

[0057] The base of the micro servo motor 220 is mounted on the micro reducer 221. The drive shaft of the micro servo motor 220 passes through the micro reducer 221 and rotatably extends into the housing 210 to connect with the wire drawing transmission main gear 24. The aforementioned micro servo motor 220 is a 100W wire drawing servo motor, but it is not limited to this and can also be a wire drawing servo motor of other suitable power.

[0058] The present invention also provides a laser welding machine, which includes a multifunctional welding device as described above, having precision wire feeding and wire drawing capabilities.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multifunctional welding device with precision wire feeding and drawing capabilities, comprising welding wire for laser welding; characterized in that: Also includes An automatic wire feeding and drawing mechanism includes a wire drawing box, a drive assembly, and a wire feeding and drawing assembly for feeding welding wire along the wire feeding direction. The wire drawing box has a cavity, a wire inlet hole at the front end of the cavity, and a wire outlet hole at the rear end of the cavity. The wire feeding and drawing assembly is rotatably disposed in the cavity and is connected to the drive assembly. A wire drawing buffer mechanism with a control device is used for real-time wire drawing and buffering of the welding wire along the wire feeding direction. The wire drawing buffer mechanism is disposed at the rear end of the wire drawing box, and the control device is electrically connected to the drive assembly. The welding wire enters through the wire inlet and is clamped and fed by the automatic wire feeding and pulling mechanism before flowing out through the wire outlet to the wire pulling buffer mechanism. During the wire feeding process, the wire pulling buffer mechanism collects the tension / displacement signal of the welding wire in real time and feeds the signal back to the controller. The controller then adjusts the rotation speed and torque of the drive component in real time to match the wire feeding speed with the welding consumption speed, so as to maintain a stable tension output to the welding wire by the automatic wire feeding and pulling mechanism.

2. The multifunctional welding device with precision wire feeding and wire drawing as described in claim 1, characterized in that: The wire drawing buffer mechanism includes a buffer seat with a buffer cavity, a buffer spring, a buffer rod, and a wire drawing buffer assembly. The buffer seat is detachably disposed on the rear side wall of the wire drawing box along the wire feeding direction. The buffer spring is embedded in the buffer cavity of the buffer seat, and the front and rear ends of the buffer spring are disposed between the wire feeding and drawing assembly and the buffer rod in an abutting manner. The wire drawing buffer assembly has a frame plate and at least two sets of buffer sensors arranged at intervals. The frame plate is located at the rear end of the buffer seat, and the two sets of buffer sensors are arranged in the front-rear direction of the frame plate along the wire feeding direction. One end of the buffer rod extends into the buffer cavity of the buffer seat, and the other end extends into the frame plate in a direction parallel to the feeding direction. The control device is electrically connected to the buffer sensors.

3. The multifunctional welding device with precision wire feeding and wire drawing according to claim 2, characterized in that: The frame plate includes an upper frame plate and a lower frame plate, which are arranged at intervals parallel to the wire feeding direction. The front end of the upper frame plate is fixed to the top plane of the buffer seat by screwing, and the rear end of the upper frame plate extends in the rearward direction. The front end of the lower frame plate is fixed to the bottom plane of the buffer seat by screwing, and the rear end of the lower frame plate extends in the rearward direction; a hollow area is formed between the upper frame plate and the lower frame plate, and the buffer rod can move in the hollow area along the front-back direction of wire feeding.

4. The multifunctional welding device with precision wire feeding and wire drawing according to claim 2, characterized in that: The buffer sensor includes a pair of front wire-drawing buffer sensors arranged vertically and a pair of rear wire-drawing buffer sensors arranged vertically and a pair of front wire-drawing buffer sensors. The pair of front wire-drawing buffer sensors are located at the front end of the frame plate, and the pair of rear wire-drawing buffer sensors are located at the rear end of the frame plate. The pair of front wire drawing buffer sensors and the pair of rear wire drawing buffer sensors are electrically connected to the controller.

5. A multifunctional welding device with precision wire feeding and wire drawing according to any one of claims 1-4, characterized in that: The wire feeding and drawing assembly includes a wire feeding and drawing drive main gear, a first wire feeding and drawing drive driven gear, a first wire feeding and drawing wheel, a second wire feeding and drawing drive driven gear, a second wire feeding and drawing wheel, multiple wire feeding fastening bolts, a first wire drawing pressure roller and a second wire drawing pressure roller, and the wire feeding and drawing drive main gear is fixed to the drive unit of the drive assembly; The first wire feeding drive driven gear and the second wire feeding drive driven gear are rotatably meshed with the side of the wire feeding drive main gear along the front and rear wire feeding directions, respectively. The first wire feeding wheel is rotatably mounted on the first wire feeding drive driven gear through the corresponding wire feeding fastening bolts, and the second wire feeding wheel is rotatably mounted on the second wire feeding drive driven gear through the corresponding wire feeding fastening bolts. The first wire drawing pressure wheel and the second wire drawing pressure wheel are rotatably mounted in the wire drawing box through the corresponding wire feeding fastening bolts. The first wire drawing pressure wheel is rotatably engaged with the first wire feeding wheel, and the second wire drawing pressure wheel is rotatably engaged with the second wire feeding wheel, so that the welding wire passes through the gap formed between the first wire feeding wheel, the second wire feeding wheel, the first wire drawing pressure wheel, and the second wire drawing pressure wheel and is fed in the wire feeding direction.

6. A multifunctional welding device with precision wire feeding and wire drawing according to claim 5, characterized in that: The wire feeding assembly also includes a guide post with a through hole in the front-to-back direction. One end of the guide post is fixed in the cavity and the other end extends away from the drive assembly. The welding wire passes through the through hole of the guide post and extends into the wire drawing buffer mechanism.

7. A multifunctional welding device with precision wire feeding and wire drawing as described in claim 5, characterized in that: The wire drawing box includes a left side plate, a wire drawing cover, and at least two base plates, all made of metal. The two base plates are alternately and detachably disposed at the bottom of the left side plate, and the wire feeding cover is detachably covered on the side of the left side plate. The cavity is formed by the left side seat plate, the wire drawing cover and at least two base plates, and the first wire drawing wheel is rotatably mounted on the base plate at the front end, and the second wire drawing wheel is rotatably mounted on the base plate at the rear end.

8. A multifunctional welding device with precision wire feeding and wire drawing according to claim 5, characterized in that: It also includes a wire feeding mechanism, which includes a wire feeding seat with a wire feeding channel, a wire drawing sleeve, and a nut. The wire feeding seat is detachably mounted on the front side wall of the wire drawing box. One end of the wire drawing sleeve is screwed into the wire feeding channel of the wire feeding seat, and the other end is screwed into the nut. It also includes a wire drawing pressure roller mechanism, which includes a wire drawing pressure roller buckle that is rotatably disposed in the box cavity, and the wire drawing pressure roller buckle cooperates with the first wire drawing pressure roller and the second wire drawing pressure roller buckle respectively.

9. A multifunctional welding device with precision wire feeding and wire drawing according to any one of claims 1-4, characterized in that: The drive assembly includes a drive source and a reducer detachably mounted on the side wall of the wire drawing box. The drive source is a micro servo motor, and the reducer is a micro speed reducer. The micro servo motor base is mounted on the micro reducer, and the micro servo motor drive shaft passes through the micro reducer and rotatably extends into the housing cavity to connect with the wire feeding and drawing transmission main gear.

10. A laser welding machine, characterized in that: The laser welding machine includes a multifunctional welding device with precision wire feeding and wire drawing as described in any one of claims 1-9.

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