Circuit board welding auxiliary mechanism

Abstract

The invention relates to the related technical field of circuit board welding, in particular to a circuit board welding machining auxiliary mechanism which comprises an objective table, a welding assembly and a welding wire feeding assembly, the objective table is used for positioning a first-stage circuit board and a second-stage circuit board to be welded, a gantry support is arranged over the objective table, a telescopic electric cylinder is arranged on the gantry support, and the welding wire feeding assembly is arranged on the objective table. The welding assembly is driven up and down through a telescopic electric cylinder on the gantry support, a mounting table is fixedly connected to the side wall of the welding assembly, and the welding wire feeding assembly is mounted on the mounting table and used for conveying welding wires. According to the circuit board welding processing auxiliary mechanism, the objective table, the welding assembly and the welding wire feeding assembly are combined to form the circuit board welding processing auxiliary mechanism, and the primary positioning groove and the secondary positioning groove are formed in the objective table, so that a primary circuit board and a secondary circuit board can be conveniently positioned; and the arrangement of the first-stage pick-up groove and the second-stage pick-up groove is convenient for a worker to place and pick the first-stage circuit board and the second-stage circuit board.

Description

Technical Field

[0001] The present invention relates to the technical field related to circuit board soldering, and specifically to an auxiliary mechanism for circuit board soldering and processing. Background Art

[0002] A flexible circuit board, also known as a flex circuit board, is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film. It has the characteristics of high wiring density, light weight, thin thickness, and good bendability; The Chinese patent document with the publication number CN212217379U discloses a rapid soldering mechanism for flexible circuit boards. The solution includes a linear moving platform, a jig, a protective atmosphere mechanism, and a pressing plate mechanism. Multiple groups of flexible circuit boards are positioned on the jig, and a support assembly for supporting the jig is arranged on the linear moving platform; the protective atmosphere mechanism includes a nozzle body, a protective atmosphere delivery pipeline, and a nozzle pushing mechanism. The nozzle pushing mechanism is installed on the support assembly, the protective atmosphere delivery pipeline is connected to the nozzle body, and the nozzle body is installed on the nozzle pushing mechanism to insert into the jig under the drive of the nozzle pushing mechanism to inject a protective atmosphere; the pressing plate mechanism includes a pressing plate assembly and a pressing plate driving assembly. The pressing plate driving assembly is connected to the pressing plate assembly to drive the pressing plate assembly to move downward to press the flexible circuit board tightly. Through holes corresponding to the soldering points of the flexible circuit board one by one are arranged on the pressing plate assembly; However, in the above solution, each component for soldering is independently driven by a separate driving structure, resulting in multiple power units required for the soldering part, and thus the circuit structure of the equipment is relatively complex, which is not convenient for the staff to perform circuit inspection and maintenance. Therefore, the present invention proposes an auxiliary mechanism for circuit board soldering and processing to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an auxiliary mechanism for circuit board soldering and processing to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An auxiliary mechanism for circuit board soldering and processing, including: A loading platform, which is used to position the first-level circuit board and the second-level circuit board to be soldered, and a gantry bracket is arranged directly above the loading platform, and a telescopic electric cylinder is arranged on the gantry bracket; A soldering assembly, which is driven up and down by the telescopic electric cylinder on the gantry bracket, and an installation platform is fixedly connected to the side wall of the soldering assembly; A wire feeding assembly, which is installed on an installation table, and the wire feeding assembly is used to convey a welding wire, and the end of the conveyed welding wire corresponds to the position of the welding head on the welding assembly, and the solder joint positions of the first-level circuit board and the second-level circuit board are located directly below the welding head.

[0005] Preferably, a first-level positioning groove and a second-level positioning groove are provided on the loading table, and the sizes of the first-level positioning groove and the second-level positioning groove respectively match the sizes of the first-level circuit board and the second-level circuit board. During actual welding, the first-level circuit board and the second-level circuit board are respectively placed in the first-level positioning groove and the second-level positioning groove.

[0006] Preferably, a first-level pick-up groove is provided at the outer side position of the first-level positioning groove, and a second-level pick-up groove is provided at the outer side position of the second-level positioning groove.

[0007] Preferably, the wire feeding assembly includes a welding wire storage tube, a welding wire guiding tube, a first auxiliary wire feeding mechanism and a second auxiliary wire feeding mechanism. The first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are used to automatically convey the welding wire forward. The structures of the first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are the same, and the first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are symmetrically arranged.

[0008] Preferably, the welding wire storage tube and the welding wire guiding tube are coaxially arranged, and the welding wire storage tube and the welding wire guiding tube are connected by a set of connecting frames. An installation frame is fixedly installed on the connecting frame. A first-level guiding hole is provided on the installation table. A first-level screw rod is fixedly connected to the installation frame. A first-level limit nut is screwed onto the upper end of the first-level screw rod. A first-level support spring is sleeved on the first-level screw rod. When the first-level support spring is in the reset state, the end of the welding wire is located directly below the welding head, and the distance between the welding wire and the welding head is greater than two centimeters.

[0009] Preferably, a fixed stress-bearing seat is fixedly installed on the loading table. A first-level guide rod is fixedly installed between the front and rear ends of the connecting frame. The first auxiliary wire feeding mechanism includes a first-level movable frame, a second-level movable frame, a wire clamping seat and a movable stress-bearing seat. A first-level guide rod hole is provided on the first-level movable frame. The first-level movable frame is movably installed on the first-level guide rod through the first-level guide rod hole, and one side wall of the first-level movable frame is arranged in contact with the side wall of the connecting frame. A first-level reset spring is sleeved on the first-level guide rod. A second-level guide rod hole is provided on the second-level movable frame. A second-level guide rod is fixedly connected to the side of the first-level movable frame facing the second-level movable frame. The second-level guide rod is movably arranged in the second-level guide rod hole, and a second-level reset spring is sleeved on the second-level guide rod.

[0010] Preferably, the movable force-bearing seat is fixedly connected to the first-level movable frame. Both the movable force-bearing seat and the fixed force-bearing seat are wedge-shaped blocks, and the inclined surfaces of the movable force-bearing seat and the fixed force-bearing seat are arranged corresponding to each other. A force-bearing block groove and a force-applying block groove are formed at the outer end of the movable force-bearing seat. A first-level pull rod groove is formed through the bottom of the force-bearing block groove. A second-level pull rod groove is formed on the first-level movable frame, and a pull rod positioning groove is formed on the second-level movable frame. A force-bearing block is movably installed in the force-bearing block groove. A pull rod is fixedly connected to the side wall of the force-bearing block. The pull rod passes through the first-level pull rod groove and the second-level pull rod groove, and the end of the pull rod is positioned in the pull rod positioning groove through a positioning screw.

[0011] Preferably, a force-bearing groove is formed on the force-bearing block, and the force-bearing groove is arranged corresponding to the force-applying block groove. A force-applying block is movably installed in the force-applying block groove. The force-applying block passes through the force-bearing groove. A second-level screw rod groove is formed through the top surface of the force-applying block groove. A second-level screw rod is fixedly connected to the upper end surface of the force-applying block. A third-level return spring is sleeved on the second-level screw rod, and a second-level limit nut is screwed on the upper side end of the second-level screw rod. When the third-level return spring is in a reset state, the end of the force-applying block protrudes outside the force-applying block groove. Inclined surfaces are formed on both the upper and lower sides of the force-applying block, and the lower inclined surface of the force-applying block is arranged parallel to the inclined surface of the movable force-bearing seat. The upper inclined surface of the force-applying block is matched with the inclined surface of the force-bearing groove.

[0012] Preferably, a hydraulic buffer is arranged between the first-level movable frame and the mounting frame.

[0013] Preferably, when the first-level movable frame reciprocates on the first-level guide rod, the force-applying block is always located above the inclined surface of the fixed force-bearing seat. During the downward pressing process of the telescopic electric cylinder, the welding head on the welding assembly presses down, thereby melting the welding wire and completing the welding of the first-level circuit board and the second-level circuit board. At the same time, the force-applying block and the inclined surface of the fixed force-bearing seat are completely received into the force-applying block groove under the action of force. And at this time, the force-bearing block moves outward under the action of the force-applying block, thereby driving the pull rod and the second-level movable frame to move, so that the wire clamping seat opens to both sides, and the movable force-bearing seat and the fixed force-bearing seat are stressed, so that the movable force-bearing seat, the first-level movable frame, the second-level movable frame, and the wire clamping seat move away from the welding assembly. When the telescopic electric cylinder moves in the return stroke, the welding assembly moves upward, so that the movable force-bearing seat is separated from the fixed force-bearing seat, so that the force-applying block loses the acting force of the fixed force-bearing seat and moves downward. At the same time, the second-level movable frame moves inward under the action of the second-level return spring, so as to clamp the welding wire through the wire clamping seat, and drives the movable force-bearing seat, the first-level movable frame, the second-level movable frame, and the wire clamping seat to move toward the welding assembly under the action of the first-level return spring, so as to realize the automatic feeding of the welding wire.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up an auxiliary mechanism for circuit board welding processing composed of a stage, a welding assembly, and a wire feeding assembly, and opening a primary positioning groove and a secondary positioning groove on the stage, it is convenient to position the primary circuit board and the secondary circuit board. Moreover, the setting of the primary picking slot and the secondary picking slot facilitates the staff to place and pick up the primary circuit board and the secondary circuit board. 2. By setting the wire feeding assembly to be composed of a wire storage tube, a wire guiding tube, a first auxiliary wire feeding mechanism, and a second auxiliary wire feeding mechanism, and setting both the first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism to be composed of a primary movable frame, a secondary movable frame, a wire clamping seat, and a movable force receiving seat, and setting a fixed force receiving seat on the stage, the automatic feeding of the wire in the X-axis direction is realized, and the feeding of the wire does not require other power sources, thus effectively optimizing the power structure of the wire feeding assembly to facilitate the staff to carry out daily circuit maintenance. 3. By setting a force receiving block and a force applying block on the movable force receiving seat and forming a linkage with the secondary movable frame through a pull rod, the automatic clamping of the wire by the wire clamping seat is realized, thus further optimizing the composition of the power source of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a half-sectional view of the stage of the present invention; Figure 3 is a schematic structural diagram of the welding assembly and the wire feeding assembly; Figure 4 is Figure 3 an enlarged schematic view of the structure at A in Figure 5 is a schematic connection diagram of the primary movable frame, the secondary movable frame, and the movable force receiving seat of the present invention; Figure 6 is a half-sectional view of the primary movable frame, the secondary movable frame, and the movable force receiving seat of the present invention; Figure 7 is a schematic diagram of the distribution of the force receiving block groove and the force applying block groove of the present invention; Figure 8 is a half-sectional view of the force receiving block of the present invention.

[0016] In the figure: loading platform 1, welding assembly 2, wire feeding assembly 3, first-level positioning groove 4, second-level positioning groove 5, first-level circuit board 6, second-level circuit board 7, first-level pick-up slot 8, second-level pick-up slot 9, welding head 10, mounting table 11, wire storage tube 12, wire guiding tube 13, wire 14, a set of connecting frames 15, mounting frame 16, first-level screw rod 17, first-level limit nut 18, first-level support spring 19, fixed stress seat 20, first-level guide rod 21, first-level movable frame 22, second-level movable frame 23, wire clamping seat 24, movable stress seat 25, first-level guide rod hole 26, first-level return spring 27, second-level guide rod hole 28, second-level guide rod 29, second-level return spring 30, stress block groove 31, force-applying block groove 32, second-level screw rod groove 33, first-level pull rod groove 34, second-level pull rod groove 35, stress block 36, pull rod 37, stress groove 38, force-applying block 39, second-level screw rod 40, third-level return spring 41, second-level limit nut 42, hydraulic buffer 43. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-8 , the present invention provides embodiments of the following three preferred solutions: Embodiment 1: An auxiliary mechanism for circuit board welding and processing, including a loading platform 1, a welding assembly 2, and a wire feeding assembly 3. The loading platform 1 is used to position the first-level circuit board 6 and the second-level circuit board 7 to be welded. And a gantry bracket is provided directly above the loading platform 1. A telescopic electric cylinder is provided on the gantry bracket. The welding assembly 2 is driven up and down by the telescopic electric cylinder on the gantry bracket. A mounting table 11 is fixedly connected to the side wall of the welding assembly 2. The wire feeding assembly 3 is installed on the mounting table 11, and the wire feeding assembly 3 is used to convey the wire 14, and the end of the conveyed wire 14 corresponds to the position of the welding head 10 on the welding assembly 2, and the welding point positions of the first-level circuit board 6 and the second-level circuit board 7 are directly below the welding head 10.

[0019] The stage 1 is provided with a primary positioning groove 4 and a secondary positioning groove 5. The sizes of the primary positioning groove 4 and the secondary positioning groove 5 respectively match the sizes of the primary circuit board 6 and the secondary circuit board 7. During actual soldering, the primary circuit board 6 and the secondary circuit board 7 are respectively placed in the primary positioning groove 4 and the secondary positioning groove 5. A primary pick-up groove 8 is provided at the outer side position of the primary positioning groove 4, and a secondary pick-up groove 9 is provided at the outer side position of the secondary positioning groove 5. By providing an auxiliary mechanism for circuit board soldering and processing composed of the stage 1, the soldering assembly 2 and the wire feeding assembly 3, and by providing the primary positioning groove 4 and the secondary positioning groove 5 on the stage 1, the primary circuit board 6 and the secondary circuit board 7 can be conveniently positioned. Moreover, the provision of the primary pick-up groove 8 and the secondary pick-up groove 9 facilitates the staff to place and pick up the primary circuit board 6 and the secondary circuit board 7.

[0020] Embodiment 2: On the basis of Embodiment 1, the wire feeding assembly 3 includes a wire storage and release tube 12, a wire guiding tube 13, a first auxiliary wire feeding mechanism and a second auxiliary wire feeding mechanism. The first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are used to automatically convey the wire 14 forward. The structures of the first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are the same, and the first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are symmetrically arranged. The wire storage and release tube 12 and the wire guiding tube 13 are coaxially arranged, and the wire storage and release tube 12 and the wire guiding tube 13 are connected by a set of connecting frames 15. An installation frame 16 is fixedly installed on the connecting frame 15. A primary guiding hole is provided on the installation table 11. A primary screw rod 17 is fixedly connected to the installation frame 16. A primary limit nut 18 is screwed and installed at the upper end of the primary screw rod 17. A primary support spring 19 is sleeved and installed on the primary screw rod 17. When the primary support spring 19 is in the reset state, the end of the wire 14 is located directly below the welding head 10, and the distance between the wire 14 and the welding head 10 is greater than two centimeters.

[0021] A fixed force-bearing seat 20 is fixedly installed on the loading platform 1. A first-stage guide rod 21 is fixedly installed between the front and rear ends of the connecting frame 15. The first auxiliary wire feeding mechanism includes a first-stage movable frame 22, a second-stage movable frame 23, a wire clamping seat 24, and a movable force-bearing seat 25. A first-stage guide rod hole 26 is formed in the first-stage movable frame 22. The first-stage movable frame 22 is movably installed on the first-stage guide rod 21 through the first-stage guide rod hole 26. One side wall of the first-stage movable frame 22 is arranged in abutment with the side wall of the connecting frame 15. A first-stage return spring 27 is sleeved on the first-stage guide rod 21. A second-stage guide rod hole 28 is formed in the second-stage movable frame 23. A second-stage guide rod 29 is fixedly connected to the side of the first-stage movable frame 22 facing the second-stage movable frame 23. The second-stage guide rod 29 is movably arranged in the second-stage guide rod hole 28. A second-stage return spring 30 is sleeved on the second-stage guide rod 29. By configuring the wire feeding assembly 3 to be composed of a wire storage and feeding pipe 12, a wire guiding pipe 13, a first auxiliary wire feeding mechanism, and a second auxiliary wire feeding mechanism, and configuring both the first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism to be composed of a first-stage movable frame 22, a second-stage movable frame 23, a wire clamping seat 24, and a movable force-bearing seat 25, and by arranging a fixed force-bearing seat 20 on the loading platform 1, automatic feeding of the welding wire 14 in the X-axis direction is achieved, and the feeding of the welding wire 14 does not require other power sources, thereby effectively optimizing the power structure of the wire feeding assembly 3 to facilitate daily circuit maintenance by the staff.

[0022] Embodiment 3: On the basis of Embodiment 2, the movable force-bearing seat 25 is fixedly connected to the first-stage movable frame 22. Both the movable force-bearing seat 25 and the fixed force-bearing seat 20 are wedge-shaped block structures, and the inclined surfaces of the movable force-bearing seat 25 and the fixed force-bearing seat 20 are arranged corresponding to each other. A force-bearing block groove 31 and a force-applying block groove 32 are formed at the outer end of the movable force-bearing seat 25. A first-stage pull rod groove 34 is formed through the bottom of the force-bearing block groove 31. A second-stage pull rod groove 35 is formed in the first-stage movable frame 22. A pull rod positioning groove is formed in the second-stage movable frame 23. A force-bearing block 36 is movably installed in the force-bearing block groove 31. A pull rod 37 is fixedly connected to the side wall of the force-bearing block 36. The pull rod 37 passes through the first-stage pull rod groove 34 and the second-stage pull rod groove 35, and the end of the pull rod 37 is positioned in the pull rod positioning groove through a positioning screw.

[0023] A force-receiving groove 38 is formed in the force-receiving block 36. The force-receiving groove 38 is arranged corresponding to the force-applying block groove 32. A force-applying block 39 is movably installed in the force-applying block groove 32. The force-applying block 39 passes through the force-receiving groove 38. A secondary screw groove 33 is formed through the top surface of the force-applying block groove 32. The upper end surface of the force-applying block 39 is fixedly connected to a secondary screw 40. A tertiary return spring 41 is sleeved on the secondary screw 40. And a secondary limit nut 42 is screwed and installed on the upper side end of the secondary screw 40. When the tertiary return spring 41 is in a reset state, the end of the force-applying block 39 protrudes outside the force-applying block groove 32. The upper and lower sides of the force-applying block 39 are both provided with inclined surfaces. And the lower inclined surface of the force-applying block 39 is arranged in parallel with the inclined surface of the movable force-receiving seat 25. The upper inclined surface of the force-applying block 39 is arranged in a matching manner with the inclined surface of the force-receiving groove 38.

[0024] A hydraulic buffer 43 is arranged between the primary movable frame 22 and the mounting frame 16. By arranging the force-receiving block 36 and the force-applying block 39 on the movable force-receiving seat 25 and forming a linkage with the secondary movable frame 23 through the pull rod 37, the wire clamping seat 24 can automatically clamp the welding wire 14, thereby further optimizing the power source composition of the device.

[0025] When the primary movable frame 22 reciprocates on the primary guide rod 21, the force-applying block 39 is always located above the inclined surface of the fixed force-receiving seat 20. During the downward pressing process of the telescopic electric cylinder, the welding head 10 on the welding assembly 2 presses downward, thereby melting the welding wire 14 and completing the welding of the primary circuit board 6 and the secondary circuit board 7. At the same time, the force-applying block 39 and the inclined surface of the fixed force-receiving seat 20 are completely received into the force-applying block groove 32. And at this time, the force-receiving block 36 moves outward under the action of the force-applying block 39, thereby driving the pull rod 37 and the secondary movable frame 23 to move, so that the wire clamping seat 24 opens to both sides. And the movable force-receiving seat 25 and the fixed force-receiving seat 20 are stressed, so that the movable force-receiving seat 25, the primary movable frame 22, the secondary movable frame 23, and the wire clamping seat 24 move away from the welding assembly 2. When the telescopic electric cylinder moves back, the welding assembly 2 moves upward, so that the movable force-receiving seat 25 is separated from the fixed force-receiving seat 20, so that the force-applying block 39 loses the acting force of the fixed force-receiving seat 20 and moves downward. At the same time, the secondary movable frame 23 moves inward under the action of the secondary return spring 30, so as to clamp the welding wire 14 through the wire clamping seat 24. And under the action of the primary return spring 27, it drives the movable force-receiving seat 25, the primary movable frame 22, the secondary movable frame 23, and the wire clamping seat 24 to move toward the welding assembly 2, thereby realizing the automatic feeding of the welding wire 14.

[0026] Although the above-described illustrative embodiments of the present application have been described to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the appended claims, all inventions created using the concept of the present application are within the scope of protection.

Claims

1. An auxiliary mechanism for circuit board welding and processing, characterized in that: Including: A stage (1) for positioning a primary circuit board (6) and a secondary circuit board (7) to be welded. A gantry bracket is provided directly above the stage (1), and a telescopic electric cylinder is provided on the gantry bracket. A welding assembly (2) driven up and down by the telescopic electric cylinder on the gantry bracket. An installation table (11) is fixedly connected to the side wall of the welding assembly (2). A wire feeding assembly (3) installed on the installation table (11) for feeding a welding wire (14). The end of the fed welding wire (14) corresponds to the position of the welding head (10) on the welding assembly (2), and the solder joint positions of the primary circuit board (6) and the secondary circuit board (7) are directly below the welding head (10).

2. The auxiliary mechanism for circuit board welding and processing according to claim 1, characterized in that: The stage (1) is provided with a primary positioning groove (4) and a secondary positioning groove (5). The sizes of the primary positioning groove (4) and the secondary positioning groove (5) respectively match the sizes of the primary circuit board (6) and the secondary circuit board (7). The primary circuit board (6) and the secondary circuit board (7) are respectively placed in the primary positioning groove (4) and the secondary positioning groove (5) during actual welding.

3. The auxiliary mechanism for circuit board welding and processing according to claim 2, wherein: A primary part-taking groove (8) is provided at the outer side edge position of the primary positioning groove (4), and a secondary part-taking groove (9) is provided at the outer side edge position of the secondary positioning groove (5).

4. An auxiliary mechanism for circuit board soldering and processing according to claim 1, characterized in that: The wire feeding assembly (3) includes a welding wire storage tube (12), a welding wire guiding tube (13), a first auxiliary wire feeding mechanism, and a second auxiliary wire feeding mechanism. The first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are used for automatically feeding the welding wire (14) forward. The structures of the first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are the same, and the first auxiliary wire feeding mechanism and the second auxiliary wire feeding mechanism are symmetrically arranged.

5. An auxiliary mechanism for PCB welding and processing according to claim 4, characterized in that: The welding wire storage tube (12) and the welding wire guiding tube (13) are coaxially arranged, and the welding wire storage tube (12) and the welding wire guiding tube (13) are connected by a set of connecting frames (15). An installation frame (16) is fixedly installed on the connecting frame (15). A primary guiding hole is provided on the installation table (11). A primary screw rod (17) is fixedly connected to the installation frame (16). A primary limit nut (18) is screwed onto the upper end of the primary screw rod (17). A primary support spring (19) is sleeved on the primary screw rod (17). When the primary support spring (19) is in the reset state, the end of the welding wire (14) is directly below the welding head (10), and the distance between the welding wire (14) and the welding head (10) is greater than two centimeters.

6. The auxiliary mechanism for circuit board soldering and processing according to claim 5, characterized in that: A fixed force-bearing seat (20) is fixedly installed on the load platform (1). A first-stage guide rod (21) is fixedly installed between the front and rear ends of the connecting frame (15). The first auxiliary wire feeding mechanism includes a first-stage movable frame (22), a second-stage movable frame (23), a wire clamping seat (24), and a movable force-bearing seat (25). A first-stage guide rod hole (26) is formed in the first-stage movable frame (22). The first-stage movable frame (22) is movably installed on the first-stage guide rod (21) through the first-stage guide rod hole (26), and one side wall of the first-stage movable frame (22) is arranged in abutment with the side wall of the connecting frame (15). A first-stage return spring (27) is sleeved on the first-stage guide rod (21). A second-stage guide rod hole (28) is formed in the second-stage movable frame (23). A second-stage guide rod (29) is fixedly connected to the side of the first-stage movable frame (22) facing the second-stage movable frame (23). The second-stage guide rod (29) is movably arranged in the second-stage guide rod hole (28), and a second-stage return spring (30) is sleeved on the second-stage guide rod (29).

7. An auxiliary mechanism for circuit board welding and processing according to claim 6, characterized in that: The movable force-bearing seat (25) is fixedly connected to the first-stage movable frame (22). Both the movable force-bearing seat (25) and the fixed force-bearing seat (20) are wedge-shaped block structures, and the inclined surfaces of the movable force-bearing seat (25) and the fixed force-bearing seat (20) are arranged corresponding to each other. A force-bearing block groove (31) and a force-applying block groove (32) are formed in the outer end of the movable force-bearing seat (25). A first-stage pull rod groove (34) is formed through the bottom of the force-bearing block groove (31). A second-stage pull rod groove (35) is formed in the first-stage movable frame (22). A pull rod positioning groove is formed in the second-stage movable frame (23). A force-bearing block (36) is movably installed in the force-bearing block groove (31). A pull rod (37) is fixedly connected to the side wall of the force-bearing block (36). The pull rod (37) passes through the first-stage pull rod groove (34) and the second-stage pull rod groove (35), and the end of the pull rod (37) is positioned in the pull rod positioning groove through a positioning screw.

8. An auxiliary mechanism for circuit board soldering and processing according to claim 7, characterized in that: A force-bearing groove (38) is formed in the force-bearing block (36). The force-bearing groove (38) is arranged corresponding to the force-applying block groove (32). A force-applying block (39) is movably installed in the force-applying block groove (32). The force-applying block (39) passes through the force-bearing groove (38). A second-stage screw rod groove (33) is formed through the top surface of the force-applying block groove (32). A second-stage screw rod (40) is fixedly connected to the upper end surface of the force-applying block (39). A third-stage return spring (41) is sleeved and installed on the second-stage screw rod (40), and a second-stage limit nut (42) is screwed and installed on the upper side end of the second-stage screw rod (40). When the third-stage return spring (41) is in a reset state, the end of the force-applying block (39) protrudes outside the force-applying block groove (32). Inclined surfaces are formed on both the upper and lower sides of the force-applying block (39), and the lower inclined surface of the force-applying block (39) is arranged parallel to the inclined surface of the movable force-bearing seat (25). The upper inclined surface of the force-applying block (39) is arranged to match the inclined surface of the force-bearing groove (38).

9. An auxiliary mechanism for circuit board welding and processing according to claim 8, characterized in that: A hydraulic buffer (43) is provided between the first-level movable frame (22) and the mounting frame (16).

10. An auxiliary mechanism for circuit board welding and processing according to claim 9, characterized in that: When the first-level movable frame (22) reciprocates on the first-level guide rod (21), the force application block (39) is always located above the inclined surface of the fixed force receiving seat (20). During the downward pressing process of the telescopic electric cylinder, the welding head (10) on the welding assembly (2) presses downward, thereby melting the welding wire (14) and completing the welding of the first-level circuit board (6) and the second-level circuit board (7). At the same time, the force application block (39) and the inclined surface of the fixed force receiving seat (20) are completely received into the force application block groove (32). And at this time, the force receiving block (36) moves outward under the action of the force application block (39), thereby driving the pull rod (37) and the second-level movable frame (23) to move, so that the wire clamping seat (24) opens to both sides, and the movable force receiving seat (25) and the fixed force receiving seat (20) are stressed, so that the movable force receiving seat (25), the first-level movable frame (22), the second-level movable frame (23), and the wire clamping seat (24) move away from the welding assembly (2). When the telescopic electric cylinder moves in the return stroke, the welding assembly (2) moves upward, so that the movable force receiving seat (25) is separated from the fixed force receiving seat (20), so that the force application block (39) loses the acting force of the fixed force receiving seat (20) and thus moves downward. At the same time, the second-level movable frame (23) moves inward under the action of the second-level return spring (30), so as to clamp the welding wire (14) through the wire clamping seat (24), and drives the movable force receiving seat (25), the first-level movable frame (22), the second-level movable frame (23), and the wire clamping seat (24) to move towards the welding assembly (2) under the action of the first-level return spring (27), thereby realizing the automatic feeding of the welding wire (14).

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