A welding tool for power electronic components

Abstract

The application belongs to the technical field of welding processing, and discloses a welding tool for power electronic components, which comprises a hot welding frame assembly, two groups of component welding plate roller arm assemblies are arranged above the hot welding frame assembly, and a centering type fixed plate and a centering type roller moving plate feeding structure during hot welding of the electronic plate are formed between the two groups of component welding plate roller arm assemblies; a self-clamping driving arm assembly for automatically centering and folding the two groups of component welding plate roller arm assemblies is arranged below the hot welding frame assembly; the clamping arm structure for the electronic plate is formed between the two groups of component welding plate roller arm assemblies; when the electronic plate is clamped between the two groups of component welding plate roller arm assemblies, the two sides of the electronic plate are clamped in the profiled roller; through rotation of the profiled roller, the roller moving plate feeding of the electronic plate in the two groups of component welding plate roller arm assemblies is realized; on one hand, the clamping and fixing of the electronic plate of different sizes are realized; on the other hand, the plate feeding treatment of the electronic plate is not affected when the plate is clamped.

Description

Technical Field

[0001] This invention belongs to the field of welding processing technology, and specifically relates to a welding fixture for power electronic components. Background Technology

[0002] Soldering of power electronic components is one of the key processes in the electronics manufacturing industry, and its quality directly affects the performance and reliability of electronic devices. In traditional soldering processes, robotic arms typically use welding torches or hot air devices to solder electronic boards. This method presents the following technical problems: Poor adaptability: Electronic boards come in a variety of sizes and specifications, and traditional welding fixtures are difficult to adapt quickly to different sizes of electronic boards. Frequent adjustments to fixtures or changes in tooling are required, which affects production efficiency.

[0003] Insufficient coordination between board feeding and welding: In the existing equipment, it is often difficult to accurately control the fixing and movement of electronic boards during the board feeding process, resulting in welding position deviation or discontinuous board feeding, which affects welding accuracy and consistency.

[0004] Process conflict: During soldering, the front end of the electronic board needs to be hot-soldered, while the back end may need to be solder paste applied or other pre-treatments at the same time. Traditional tooling makes it difficult to achieve synchronous coordination between the two, which can easily lead to process conflicts or wasted time.

[0005] Complex structure: In the existing technology, multiple sets of drive mechanisms and complex mechanical structures are often used to achieve the functions of fixing and feeding electronic boards, resulting in high equipment costs and difficult maintenance.

[0006] To address the aforementioned problems, there is an urgent need for a welding fixture capable of automatically adapting to electronic boards of different sizes, achieving precise centering and quantitative board feeding, in order to improve welding efficiency, ensure welding quality, and simplify the operation process. This application proposes a welding fixture for power electronic components, which effectively solves the shortcomings of existing technologies through an innovative centering and fixing structure, a roller feeding mechanism, and a quantitative drive design, providing an efficient and reliable welding solution for the electronics manufacturing field. Summary of the Invention

[0007] To address the problems mentioned in the background section, this invention provides a welding fixture for power electronic components, which facilitates board feeding and hot welding.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a welding fixture for power electronic components, comprising a hot welding frame assembly, two sets of component welding plate roller arm assemblies are arranged above the hot welding frame assembly, and a centering plate fixing and centering roller feeding structure is formed between the two sets of component welding plate roller arm assemblies for hot welding of electronic boards; a self-clamping drive arm assembly is arranged below the hot welding frame assembly to drive the two sets of component welding plate roller arm assemblies to automatically center and retract; a quantitative feeding drive assembly is arranged at one end of the top of the component welding plate roller arm assembly, and the component welding plate roller arm assembly is driven by the quantitative feeding drive assembly so that the electronic board forms a quantitative feeding hot welding structure on the hot welding frame assembly.

[0009] In a preferred embodiment of a welding fixture for power electronic components, the hot welding frame assembly includes a I-beam frame, a cylinder fixedly mounted on the top of the I-beam frame, a heating plate fixedly mounted on the bottom of the cylinder, mounting feet fixedly mounted at both ends of the bottom of the I-beam frame, and a seat plate fixedly mounted at the center of the bottom of the I-beam frame. T-shaped sliding grooves are provided on both sides of the seat plate, and an abutment end plate is fixedly mounted at one end of the bottom of the seat plate. Multiple guide slide rods are fixedly mounted on the abutment end plate, and a limit end plate is fixedly mounted at the end of the guide slide rod away from the abutment end plate. An abutment spring is sleeved on the guide slide rod.

[0010] In a preferred embodiment of a welding fixture for power electronic components, the self-clamping drive arm assembly includes a drive shaft and an abutting gear. The top and bottom of the drive shaft are respectively fixedly provided with a drive cross arm and a drive gear. One end of the abutting gear is fixedly provided with an abutting back plate. The abutting back plate has multiple through sliding holes. Two tensioning arms are rotatably provided on both sides of the top of the drive cross arm, and the two tensioning arms are arranged parallel to each other.

[0011] In a preferred embodiment of a welding fixture for power electronic components, the component welding plate roller arm assembly includes a U-shaped arm, a plurality of T-shaped sliders are fixedly installed at the bottom of the U-shaped arm, and a plurality of I-shaped rollers are rotatably installed inside the U-shaped arm. A vertical shaft is fixedly installed at the top of the I-shaped rollers, and two pulleys are fixedly installed at the end of the vertical shaft. A belt is sleeved on the pulleys. An L-shaped end frame is fixedly installed at one end of the top of the U-shaped arm, and a straight end frame is fixedly installed on the back of the L-shaped end frame. A drive motor is fixedly installed on the straight end frame.

[0012] In a preferred embodiment of a welding fixture for power electronic components, the quantitative feeding drive assembly includes a quantitative drive wheel and a quantitative actuating wheel. The quantitative drive wheel has a quantitative drive shaft fixedly installed at its bottom, and multiple straight grooves and arc-shaped grooves are opened on the quantitative drive wheel. The quantitative actuating wheel has an actuating wheel shaft fixedly installed at its bottom, an actuating wheel arm fixedly installed on the actuating wheel shaft, and an actuating wheel rod fixedly installed on the actuating wheel arm.

[0013] In a preferred embodiment of a welding fixture for power electronic components, the quantitative actuating wheel is configured as an incomplete wheel structure, the actuating wheel shaft is connected to the output shaft of a drive motor, the quantitative drive shaft is fixedly connected to a vertical shaft on the component welding plate roller arm assembly, and the quantitative drive shaft is rotatably mounted on an L-shaped end frame.

[0014] In a preferred embodiment of a welding fixture for power electronic components, the quantitative actuating wheel rotates within the quantitative driving wheel via an arc-shaped groove, and at this time, the actuating wheel rod on the actuating wheel arm actuates the quantitative driving wheel via a straight groove.

[0015] In a preferred embodiment of a welding fixture for power electronic components, the drive shaft is rotatably mounted at the center of the base plate via a bearing. At this time, the drive cross arm is located above the base plate, the drive gear is located below the base plate, the abutment back plate slides through a through-hole on the limiting end plate, the two ends of the abutment spring abut against the abutment back plate and the abutment end plate respectively, and the abutment gear meshes with the drive gear.

[0016] In a preferred embodiment of a welding fixture for power electronic components, the T-shaped slider slides on the base plate via a T-shaped groove, and the ends of the two tensioning arms away from the drive cross arm are rotatably connected to the frame at the bottom of the two U-shaped arms. Through the bidirectional rotation of the drive cross arm, the synchronous contact and synchronous separation between the two sets of component welding plate roller arm assemblies are achieved.

[0017] In a preferred embodiment of a welding fixture for power electronic components, the bottom of the quantitative drive shaft is fixedly connected to the vertical shaft below the L-shaped end frame. At this time, multiple vertical shafts are connected in series through belts and multiple pulleys. Two sets of component welding plate roller arm assemblies are arranged opposite each other, and a board placement structure for securing the electronic board is formed between the two rows of I-shaped rollers on the two sets of component welding plate roller arm assemblies.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention tightens the component soldering plate roller arm assembly by tightening the tension arm, so that the two component soldering plate roller arm assemblies form a clamping arm structure for the electronic board. At the same time, when the two component soldering plate roller arm assemblies clamp the electronic board, the two sides of the electronic board are fixed in the I-shaped roller. In actual use, the rotation of the I-shaped roller realizes the roller feeding of the electronic board in the two component soldering plate roller arm assemblies. On the one hand, it realizes the clamping and fixing of electronic boards of different sizes, and on the other hand, it does not affect the feeding process of the electronic board when clamping. 2. The present invention sets the electronic board in a movable manner. Compared with the traditional method of using a robotic arm to drive the welding gun or hot chamber, the structural design of the present invention is simpler. At the same time, when the electronic board is fed onto the hot welding frame assembly, while the front end of the electronic board passes under the heating plate for hot welding, solder paste can be applied to the rear end of the electronic board simultaneously. 3. The component soldering plate roller arm assembly of the present invention is provided with a quantitative board feeding drive assembly at one end of the top. By driving the component soldering plate roller arm assembly through the quantitative board feeding drive assembly, the electronic board forms a quantitative board feeding hot soldering structure on the hot soldering frame assembly. In this way, during hot soldering, on the one hand, it can ensure that the front end of the electronic board is quickly delivered to the bottom of the heating plate, and on the other hand, it can ensure that sufficient processing time is allowed when the back end of the electronic board is subjected to solder paste placement, so that the front end soldering and the back end placement process of the electronic board do not conflict. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a perspective view of the hot welding frame assembly of the present invention; Figure 4 This is a perspective view of the self-clamping drive arm assembly of the present invention; Figure 5 This is a perspective view of the component welding plate roller arm assembly and the quantitative plate feeding drive assembly of the present invention. Figure 6 This is a perspective view of the welding plate roller arm assembly of the present invention. Figure 7 This is a perspective view of the quantitative feeding drive assembly of the present invention.

[0020] In the diagram: 100, Welding machine frame assembly; 101, I-beam frame; 102, Mounting foot plate; 103, T-slot; 104, Seat plate; 105, Limiting end plate; 106, Guide slide rod; 107, Abutment spring; 108, Abutment end plate; 109, Cylinder; 110, Heating plate; 200, Self-clamping drive arm assembly; 201, Drive shaft; 202, Drive cross arm; 203, Drive gear; 204, Abutment gear; 205, Through-hole; 206, Abutment back plate; 207, Tensioning arm; 300. Components: Welding plate roller arm assembly; 301, U-shaped arm; 302, T-shaped slider; 303, L-shaped end frame; 304, straight end frame; 305, drive motor; 306, belt; 307, pulley; 308, I-shaped roller; 309, vertical shaft; 400, quantitative feeding drive assembly; 401, quantitative drive wheel; 402, arc-shaped groove; 403, straight groove; 404, quantitative drive shaft; 405, quantitative actuation wheel; 406, actuation wheel shaft; 407, actuation wheel arm; 408, actuation wheel rod; 500, electronic board. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-7 As shown, the present invention provides a welding fixture for power electronic components, including a hot welding frame assembly 100. Two sets of component welding plate roller arm assemblies 300 are arranged above the hot welding frame assembly 100, forming a centering fixing plate and a centering roller feeding plate structure for hot welding of electronic board 500. A self-clamping drive arm assembly 200 is arranged below the hot welding frame assembly 100 to drive the two sets of component welding plate roller arm assemblies 300 to automatically center and retract. A quantitative feeding drive assembly 400 is arranged at one end of the top of the component welding plate roller arm assembly 300. By driving the component welding plate roller arm assembly 300 through the quantitative feeding drive assembly 400, the electronic board 500 forms a quantitative feeding hot welding structure on the hot welding frame assembly 100.

[0023] In a preferred embodiment, please refer to Figure 3 The hot welding machine frame assembly 100 includes a frame 101. A cylinder 109 is fixedly installed on the top of the frame 101, and a heating plate 110 is fixedly installed on the bottom of the cylinder 109. Mounting feet 102 are fixedly installed at both ends of the bottom of the frame 101, and a seat plate 104 is fixedly installed at the center of the bottom of the frame 101. T-shaped sliding grooves 103 are opened on both sides of the seat plate 104, and an abutting end plate 108 is fixedly installed at one end of the bottom of the seat plate 104. Multiple guide slides 106 are fixedly installed on the abutting end plate 108. A limit end plate 105 is fixedly installed at the end of the guide slide 106 away from the abutting end plate 108, and an abutting spring 107 is sleeved on the guide slide 106.

[0024] In a preferred embodiment, please refer to Figure 4 The self-clamping drive arm assembly 200 includes a drive shaft 201 and an abutment gear 204. The top and bottom of the drive shaft 201 are respectively fixedly provided with a drive cross arm 202 and a drive gear 203. One end of the abutment gear 204 is fixedly provided with an abutment back plate 206. Multiple through sliding holes 205 are provided on the abutment back plate 206. Two tensioning arms 207 are rotatably provided on both sides of the top of the drive cross arm 202. The two tensioning arms 207 are arranged in parallel between each other.

[0025] In this embodiment, the drive shaft 201 is rotatably mounted at the center of the seat plate 104 via a bearing. At this time, the drive cross arm 202 is located above the seat plate 104, and the drive gear 203 is located below the seat plate 104.

[0026] In this embodiment, the back plate 206 slides through the through hole 205 on the limiting end plate 105, the two ends of the abutment spring 107 abut against the back plate 206 and the end plate 108 respectively, and the abutment gear 204 meshes with the drive gear 203.

[0027] In this embodiment, the ends of the two tensioning arms 207 away from the drive cross arm 202 are rotatably connected to the frame at the bottom of the two U-shaped arms 301. By driving the cross arm 202 to rotate in both directions, the synchronous contact and synchronous separation between the two sets of component welding plate roller arm assemblies 300 are achieved.

[0028] In a preferred embodiment, please refer to Figure 6 The component welding plate roller arm assembly 300 includes a U-shaped arm 301. Multiple T-shaped sliders 302 are fixedly installed at the bottom of the U-shaped arm 301, and multiple I-shaped rollers 308 are rotatably installed inside the U-shaped arm 301. A vertical shaft 309 is fixedly installed at the top of the I-shaped rollers 308. Two pulleys 307 are fixedly installed at the end of the vertical shaft 309. A belt 306 is sleeved on the pulleys 307. An L-shaped end frame 303 is fixedly installed at one end of the top of the U-shaped arm 301. A straight end frame 304 is fixedly installed on the back of the L-shaped end frame 303. A drive motor 305 is fixedly installed on the straight end frame 304.

[0029] In this embodiment, the T-shaped slider 302 slides on the seat plate 104 via the T-shaped groove 103.

[0030] In this embodiment, two sets of component soldering plate roller arm assemblies 300 are arranged facing each other, and a board-laying structure for securing the electronic board 500 is formed between the two rows of I-shaped rollers 308 on the two sets of component soldering plate roller arm assemblies 300.

[0031] In a preferred embodiment, please refer to Figure 7 The quantitative feeding drive assembly 400 includes a quantitative drive wheel 401 and a quantitative actuating wheel 405. The quantitative drive wheel 401 is fixedly provided with a quantitative drive shaft 404 at its bottom, and the quantitative drive wheel 401 is provided with a plurality of straight grooves 403 and arc-shaped grooves 402. The quantitative actuating wheel 405 is fixedly provided with an actuating wheel shaft 406 at its bottom, an actuating wheel arm 407 is fixedly provided on the actuating wheel shaft 406, and an actuating wheel rod 408 is fixedly provided on the actuating wheel arm 407.

[0032] In this embodiment, the quantitative actuation wheel 405 is configured as an incomplete wheel structure, the actuation wheel shaft 406 is connected to the output shaft of the drive motor 305, the quantitative drive shaft 404 is fixedly connected to a vertical shaft 309 on the component welding plate roller arm assembly 300, and the quantitative drive shaft 404 is rotatably mounted on the L-shaped end frame 303.

[0033] In this embodiment, the quantitative actuation wheel 405 rotates within the quantitative drive wheel 401 via the arc-shaped groove 402. At this time, the actuation wheel rod 408 on the actuation wheel arm 407 actuates the quantitative drive wheel 401 via the straight groove 403.

[0034] In this embodiment, the bottom of the quantitative drive shaft 404 is fixedly connected to the vertical shaft 309 below the L-shaped end frame 303.

[0035] In this embodiment, multiple vertical shafts 309 are connected in series via belts 306 and multiple pulleys 307.

[0036] The working principle of this invention is as follows: During soldering, this invention employs a hot soldering method, where electronic components are placed onto an electronic board 500 using solder paste. The board 500 is then sent to a hot air station for heating and solder melting. This method achieves surface-mount hot soldering of electronic components. However, existing electronic boards 500 vary in size during hot soldering, requiring complex and cumbersome design to both fix and feed them. To overcome these drawbacks, this invention provides two sets of component soldering plate roller arm assemblies 300 above the hot soldering frame assembly 100, forming a connection between the two sets of component soldering plate roller arm assemblies 300 and the electronic board. The 500 hot welding machine features a centering fixed plate and a centering roller feeding structure. Below the hot welding frame assembly 100 is a self-clamping drive arm assembly 200 that drives two sets of component welding plate roller arm assemblies 300 for automatic centering and retraction. Its specific working principle is as follows: the drive shaft 201 is rotatably mounted at the center of the base plate 104 via bearings. At this time, the drive cross arm 202 is located above the base plate 104, and the drive gear 203 is located below the base plate 104. The contact back plate 206 slides through the through-hole 205 on the limiting end plate 105. The two ends of the contact spring 107 abut against the contact back plate 206 and the contact end plate 108 respectively. The contact gear 204 meshes with the drive gear 203. The T-shaped slider 302 slides through the T-shaped groove 103 on the base plate 104. Sliding, the ends of the two tensioning arms 207 away from the drive cross arm 202 are rotatably connected to the frame at the bottom of the two U-shaped arms 301. Through the bidirectional rotation of the drive cross arm 202, the synchronous contact and synchronous separation between the two sets of component soldering plate roller arm assemblies 300 are achieved. In actual use, the push of the contact back plate 206 by the contact spring 107 causes the contact gear 204 to move. During the movement of the contact gear 204, the contact gear 204 and the drive gear 203 mesh, causing the drive gear 203 to drive the drive cross arm 202 to rotate. A tensioning arm 207 is provided on the drive cross arm 202, and the tensioning arms 207 are arranged in parallel. The distal end of the tensioning arm 207 is rotatably set at the bottom of the component soldering plate roller arm assembly 300. When the drive arm 202 rotates, the rotation of the drive arm 202 drives the tension arm 207 to rotate. The tension arm 207 tensions the component soldering plate roller arm assembly 300, so that a clamping arm structure for the electronic board 500 is formed between the two component soldering plate roller arm assemblies 300. At the same time, when the two component soldering plate roller arm assemblies 300 clamp the electronic board 500, both sides of the electronic board 500 are fixed in the I-shaped roller 308. In actual use, the rotation of the I-shaped roller 308 realizes the roller feeding of the electronic board 500 within the two component soldering plate roller arm assemblies 300. In this way, on the one hand, the clamping and fixing of electronic boards 500 of different sizes can be achieved, and on the other hand, the feeding process of the electronic board 500 is not affected when clamping.

[0037] Based on the above, when the electronic board 500 is secured within the two sets of component soldering roller arm assemblies 300, the rotation of the I-shaped roller 308 enables the electronic board 500 to be fed onto the hot soldering frame assembly 100. At this time, the electronic board 500 passes below the heating plate 110, and the cylinder 109 drives the heating plate 110 to descend, heating the electronic board 500. It should be noted that the electronic board 500 has already been pre-treated; it has undergone solder paste application. When the electronic board 500... When board 500 passes the heating plate 110, the electronic board 500 undergoes a heating and tinning process. In this way, the electronic components are thermally soldered on the electronic board 500. The present invention makes the electronic board 500 movable. Compared with the traditional method of a robotic arm driving a soldering gun or hot chamber, the structural design of the present invention is simpler. At the same time, when the electronic board 500 is fed on the hot soldering frame assembly 100, when the front end of the electronic board 500 passes under the heating plate 110 for hot soldering, solder paste can be applied to the rear end of the electronic board 500 simultaneously.

[0038] Based on the above, in order to ensure the hot soldering time of the heating plate 110 and at the same time allow sufficient processing time for the solder paste application at the rear end of the electronic board 500, a quantitative board feeding drive assembly 400 is provided at one end of the top of the component soldering plate roller arm assembly 300. The quantitative board feeding drive assembly 400 drives the component soldering plate roller arm assembly 300, so that the electronic board 500 forms a quantitative board feeding hot soldering structure on the hot soldering frame assembly 100. The actuating wheel shaft 406 is connected to the output shaft of the drive motor 305, and the quantitative drive shaft 404 is connected to the component soldering plate roller arm assembly. A vertical shaft 309 is fixedly connected to component 300. A quantitative drive shaft 404 is rotatably mounted on an L-shaped end frame 303. A quantitative actuation wheel 405 rotates within a quantitative drive wheel 401 via an arc-shaped groove 402. At this time, an actuation wheel rod 408 on an actuation wheel arm 407 actuates the quantitative drive wheel 401 via a straight groove 403. The specific working principle is as follows: When the electronic board 500 is hot-welded between two sets of component welding plate roller arm assemblies 300, the quantitative actuation wheel 405 is driven to rotate by a drive motor 305. When the quantitative actuation wheel 405 rotates within a L-shaped end frame 303, the quantitative drive wheel 405 rotates within a L-shaped end frame 303. 5. When the metering wheel 405 rotates once, the actuating wheel rod 408 on the metering actuating wheel 405 quickly actuates the metering drive wheel 401 through the straight groove 403. After actuation, the metering actuating wheel 405 rotates again in the arc groove 402 and limits the rotation of the metering drive wheel 401. In this way, the rapid actuation and subsequent dwell of the metering drive wheel 401 are achieved, i.e., the intermittent rotation of the metering drive wheel 401 is achieved. Since the metering plate feeding drive assembly 400 is set on a vertical shaft 309 on the component welding plate roller arm assembly 300, the electric... The daughter board 500 drives the intermittent rotation of the I-shaped roller 308 through the intermittent rotation of the vertical shaft 309, thereby realizing the intermittent transfer of the electronic board 500 between the two sets of component soldering roller arm assemblies 300, that is, the quantitative board feeding of the present invention. Through this intermittent quantitative board feeding, during hot soldering, on the one hand, it can ensure that the front end of the electronic board 500 is quickly delivered to the heating plate 110, and on the other hand, it can ensure that sufficient processing time is left when the back end of the electronic board 500 is subjected to solder paste placement, so that the soldering process at the front end of the electronic board 500 and the placement process at the back end do not conflict.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for power electronic components, comprising a hot welding frame assembly (100), characterized in that: Two sets of component welding plate roller arm assemblies (300) are provided above the hot welding frame assembly (100). The two sets of component welding plate roller arm assemblies (300) form a centering plate fixing and centering roller feeding structure when hot welding the electronic board (500). A self-clamping drive arm assembly (200) is provided below the hot welding frame assembly (100) to drive the two sets of component welding plate roller arm assemblies (300) to automatically center and retract. A quantitative feeding drive assembly (400) is provided at one end of the top of the component welding plate roller arm assembly (300). By driving the component welding plate roller arm assembly (300) through the quantitative feeding drive assembly (400), the electronic board (500) forms a quantitative feeding hot welding structure on the hot welding frame assembly (100). The hot welding frame assembly (100) includes a frame (101), a cylinder (109) is fixedly installed on the top of the frame (101), a heating plate (110) is fixedly installed on the bottom of the cylinder (109), mounting feet (102) are fixedly installed at both ends of the bottom of the frame (101), and a seat plate (104) is fixedly installed at the center of the bottom of the frame (101). T-shaped grooves (103) are opened on both sides of the seat plate (104), and an abutment end plate (108) is fixedly installed at one end of the bottom of the seat plate (104). Multiple guide slides (106) are fixedly installed on the abutment end plate (108), and a limit end plate (105) is fixedly installed at the end of the guide slide (106) away from the abutment end plate (108), and an abutment spring (107) is sleeved on the guide slide (106). The self-clamping drive arm assembly (200) includes a drive shaft (201) and an abutment gear (204). The top and bottom of the drive shaft (201) are respectively fixedly provided with a drive cross arm (202) and a drive gear (203). One end of the abutment gear (204) is fixedly provided with an abutment back plate (206). The abutment back plate (206) is provided with a plurality of through sliding holes (205). Two tensioning arms (207) are rotatably provided on both sides of the top of the drive cross arm (202). The two tensioning arms (207) are arranged in parallel between each other.

2. The welding fixture for power electronic components according to claim 1, characterized in that: The component welding plate roller arm assembly (300) includes a U-shaped arm (301), with multiple T-shaped sliders (302) fixedly installed at the bottom of the U-shaped arm (301), and multiple I-shaped rollers (308) rotatably installed inside the U-shaped arm (301). A vertical shaft (309) is fixedly installed at the top of the I-shaped rollers (308), and two pulleys (307) are fixedly installed at the end of the vertical shaft (309). A belt (306) is fitted on the pulleys (307). An L-shaped end frame (303) is fixedly installed at one end of the top of the U-shaped arm (301), and a straight end frame (304) is fixedly installed on the back of the L-shaped end frame (303). A drive motor (305) is fixedly installed on the straight end frame (304).

3. The welding fixture for power electronic components according to claim 2, characterized in that: The quantitative feeding drive assembly (400) includes a quantitative drive wheel (401) and a quantitative actuation wheel (405). The quantitative drive wheel (401) has a quantitative drive shaft (404) fixedly installed at its bottom, and the quantitative drive wheel (401) has multiple straight grooves (403) and arc-shaped grooves (402). The quantitative actuation wheel (405) has an actuation wheel shaft (406) fixedly installed at its bottom, an actuation wheel arm (407) fixedly installed on the actuation wheel shaft (406), and an actuation wheel rod (408) fixedly installed on the actuation wheel arm (407).

4. The welding fixture for power electronic components according to claim 3, characterized in that: The quantitative actuation wheel (405) is configured as an incomplete wheel structure. The actuation wheel shaft (406) is connected to the output shaft of the drive motor (305). The quantitative drive shaft (404) is fixedly connected to a vertical shaft (309) on the component welding plate roller arm assembly (300). The quantitative drive shaft (404) is rotatably mounted on the L-shaped end frame (303).

5. The welding fixture for power electronic components according to claim 4, characterized in that: The quantitative actuation wheel (405) rotates within the quantitative drive wheel (401) through the arc groove (402). At this time, the actuation wheel rod (408) on the actuation wheel arm (407) actuates the quantitative drive wheel (401) through the straight groove (403).

6. The welding fixture for power electronic components according to claim 5, characterized in that: The drive shaft (201) is rotatably mounted at the center of the seat plate (104) via a bearing. At this time, the drive cross arm (202) is located above the seat plate (104), the drive gear (203) is located below the seat plate (104), the abutment back plate (206) slides through the through hole (205) on the limiting end plate (105), the two ends of the abutment spring (107) abut against the abutment back plate (206) and the abutment end plate (108) respectively, and the abutment gear (204) meshes with the drive gear (203).

7. The welding fixture for power electronic components according to claim 6, characterized in that: The T-shaped slider (302) slides on the seat plate (104) through the T-shaped slide groove (103). The two tensioning arms (207) are rotatably connected to the frame at the bottom of the two U-shaped arms (301) at one end away from the drive cross arm (202). Through the bidirectional rotation of the drive cross arm (202), the synchronous contact and synchronous separation between the two sets of component welding plate roller arm assemblies (300) are realized.

8. The welding fixture for power electronic components according to claim 7, characterized in that: The bottom of the quantitative drive shaft (404) is fixedly connected to the vertical shaft (309) below the L-shaped end frame (303). At this time, multiple vertical shafts (309) are connected in series through belts (306) and multiple pulleys (307). Two sets of component soldering plate roller arm assemblies (300) are arranged opposite each other. The two rows of I-shaped rollers (308) on the two sets of component soldering plate roller arm assemblies (300) form a board-laying structure for securing the electronic board (500).

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