A brazing production line for processing radiator fins and its welding process

Abstract

The present invention relates to the technical field of brazing, in particular to a brazing production line for processing radiator fins and its welding process, including a plasma spot welding module and a brazing furnace. A brazing flux spraying device and a drying device are sequentially arranged between the plasma spot welding module and the brazing furnace. A production line conveyor belt is arranged in the plasma spot welding module, the brazing flux spraying device, the drying device and the brazing furnace, and the production line conveyor belt is used for transporting radiator fins; in the present invention, the brazing filler metal in the radiator fins melts in the welding chamber, and then the radiator fins are driven to vibrate in the promotion chamber, so that when the liquid brazing filler metal flows into the gap of the base material, appropriate vibration can break the bondage of the surface tension.

Description

Technical Field

[0001] The present invention relates to the technical field of brazing, and specifically relates to a brazing production line for processing radiator fins and its welding process. Background Art

[0002] In the production process of radiator fins, preliminary assembly is usually carried out first. Components such as fins, flat tubes, and condensate tubes are pre-assembled together, and brazing filler metal is pre-placed in the gaps during assembly. After passing through flux spraying and drying in sequence, they are sent into a brazing furnace for welding. In the inert gas atmosphere and high-temperature environment of the brazing furnace, the pre-placed brazing filler metal melts into a liquid state and flows into the gaps between the assembled components. After cooling, the welding is completed. This method can meet most production requirements, but for higher processing quality requirements, there are still some defects. The liquid brazing filler metal melted at high temperature is hindered by surface tension, making it difficult to quickly and smoothly fill the entire gap. If air or other gases remain in the gap, it will hinder the flow and spreading of the brazing filler metal, possibly causing uneven filling of the brazing filler metal and defects such as pores. Summary of the Invention

[0003] The purpose of the present invention is to provide a brazing production line for processing radiator fins and its welding process to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A brazing production line for processing radiator fins includes a plasma spot welding module and a brazing furnace. A flux spraying device and a drying device are sequentially arranged between the plasma spot welding module and the brazing furnace. A production line conveyor belt is arranged in the plasma spot welding module, the flux spraying device, the drying device, and the brazing furnace. The production line conveyor belt is used to transport radiator fins, so that the radiator fins pass through the plasma spot welding module, the flux spraying device, the drying device, and the brazing furnace in sequence. The plasma spot welding module is used to perform spot welding and fixation on the preliminarily assembled radiator fins.

[0005] The brazing furnace includes a preheating chamber, a welding chamber, a promoting chamber, and a heat preservation chamber arranged in sequence. The temperature of the welding chamber and the promoting chamber is the same. An interval gap is provided on the production line conveyor belt, and a split conveyor belt is arranged in the interval gap. The split conveyor belt is located in the promoting chamber, and a lifting and vibrating device is arranged in the promoting chamber. The lifting and vibrating device is used to control the lifting movement and vibration of the split conveyor belt. When the production line conveyor belt transports the radiator fins to the promoting chamber, the lifting and vibrating device controls the split conveyor belt to rise, jacks up the radiator fins through the split conveyor belt to separate them from the upper surface of the production line conveyor belt, and drives the radiator fins to vibrate. At the same time, the split conveyor belt transports the radiator fins through rotation. When the radiator fins leave the promoting chamber, the split conveyor belt moves down to release the radiator fins.

[0006] The plasma spot welding module includes a welding moving arm and a plasma spray gun. The welding moving arm is used to control the movement of the plasma spray gun, and the radiator fins are subjected to plasma spot welding through the plasma spray gun.

[0007] The lifting and vibrating device includes split support rollers, a roller frame, and a U-shaped upper frame. The split support rollers support the split conveyor belt. The rotation of the split support rollers drives the split conveyor belt to rotate, realizing the transportation of the radiator fins. A roller frame is arranged outside the split support rollers. The U-shaped upper frame is fixedly installed with the roller frame. The lifting of the U-shaped upper frame drives the split conveyor belt to move up and down. A U-shaped bottom frame is arranged below the U-shaped upper frame, and the U-shaped bottom frame is fixedly installed with the promotion bin.

[0008] A limiting vertical shaft is fixedly installed above the U-shaped bottom frame. The limiting vertical shaft passes through the U-shaped upper frame in an interspersed manner to limit the U-shaped upper frame. A lifting cylinder is fixedly installed on the U-shaped bottom frame. A lifting hopper plate is fixedly arranged on the telescopic shaft of the lifting cylinder, and the lifting of the lifting hopper plate is controlled by the lifting cylinder.

[0009] Flank plates are fixedly arranged on the U-shaped upper frame. A tension spring is connected below the flank plates, and the lower end of the tension spring is fixedly connected with the lifting hopper plate. The tension spring exerts an elastic pulling force on the flank plates to move towards the lifting hopper plate. A vibrating roller is arranged below the U-shaped upper frame. Convex rib strips are fixedly arranged on the surface of the vibrating roller. When the vibrating roller rotates, the U-shaped upper frame can be intermittently pushed and lifted through the convex rib strips.

[0010] A transverse central axis is coaxially and fixedly arranged in the vibrating roller. The transverse central axis is limited and passes through the side wall of the lifting hopper plate in an interspersed manner. A driving motor is fixedly installed on the lifting hopper plate, and the driving motor drives the vibrating roller to rotate through the transverse central axis.

[0011] Parallel pressure rollers are arranged on the U-shaped upper frame. The parallel pressure rollers guide and support the split conveyor belt, enabling a part of the split conveyor belt to pass parallel above the U-shaped upper frame. An air flow equalizing cavity is opened inside the U-shaped upper frame. Heat dissipation air holes are penetrated and opened on the upper surface inside the air flow equalizing cavity. The heat dissipation air holes are used to cool the part of the split conveyor belt passing parallel above the U-shaped upper frame. A driving air cavity is opened inside the U-shaped upper frame. A piston plate body is arranged inside the driving air cavity. The piston plate body is in sealed contact with the inner wall surface of the driving air cavity. Plate positioning springs are arranged above and below the piston plate body. A counterweight part is fixedly arranged on the piston plate body. The plate positioning springs cooperate with each other to elastically support the piston plate body, enabling the piston plate body to be in the middle position of the driving air cavity.

[0012] The lower surface of the driving air chamber is penetrated downward to form a breathing air groove. A horizontal air passage and an external connecting air passage are provided inside the U-shaped upper frame. The horizontal air passage is communicated with the upper part of the driving air chamber. The horizontal air passage is communicated with the external connecting air passage. The upper end of the external connecting air passage is communicated with the uniform flow air chamber. A first one-way air valve and a second one-way air valve are arranged inside the external connecting air passage. The communication port between the horizontal air passage and the external connecting air passage is located between the first one-way air valve and the second one-way air valve. The first one-way air valve enables the air flow to flow unidirectionally into the uniform flow air chamber, and the second one-way air valve enables the air flow to flow unidirectionally from the outside into the external connecting air passage.

[0013] A support vertical plate is fixedly arranged above the U-shaped upper frame. A track shaft body is fixedly arranged on the support vertical plate. A monitoring scraping plate is slidably and limitably installed outside the track shaft body. The monitoring scraping plate is in contact with the surface of the split conveyor belt. A scraping spring is arranged between the monitoring scraping plate and the support vertical plate. A contact detection part is fixedly arranged on the support vertical plate; when there is solidified brazing filler metal on the surface of the split conveyor belt, the contact between the solidified brazing filler metal and the monitoring scraping plate can push the monitoring scraping plate to move towards the contact detection part, thereby realizing detection.

[0014] A soldering process for a brazing production line for processing radiator fins. First, the preliminarily assembled radiator fins are spot-welded and stabilized through a plasma spot-welding module. After passing through flux spraying and drying in sequence, brazing is carried out in a brazing furnace. After reaching the promotion chamber in the brazing furnace, the radiator fins are driven to vibrate.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] For the brazing production line for processing radiator fins of the present invention, through the cooperation of the arranged promotion chamber, split conveyor belt and lifting vibration device, etc., the brazing filler metal in the radiator fins is melted in the welding chamber, and then the radiator fins are driven to vibrate in the promotion chamber, so that when the liquid brazing filler metal flows into the gap of the base material, through appropriate vibration, the restraint of the surface tension can be broken, making it easier for the brazing filler metal to break through the obstacles and enter some narrow gaps. And the vibration wave conducts in the component, and the gas is disturbed and will be discharged along the flowing direction of the brazing filler metal, reducing the defects such as uneven brazing filler metal filling and porosity caused by gas blockage, and greatly improving the brazing quality of the radiator fins; through the plasma spot-welding module, the key points of the preliminarily assembled radiator fins are pre-spot-welded and stabilized, so as to avoid the vibration from damaging the assembly accuracy and avoid the occurrence of misalignment problems.

[0017] Through the cooperation of structures such as the arranged heat dissipation air holes and the monitoring scraping plate, the present invention can simultaneously and real-time detect whether liquid brazing filler metal drips on the surface of the split conveyor belt. When liquid brazing filler metal drips on the surface of the split conveyor belt, it indicates that the set vibration intensity is too large, and an alarm prompt is given in time.

[0018] Through the cooperation of structures such as the provided driving air chamber, piston plate body, and plate body positioning spring, the up and down vibration of the U-shaped upper frame can be utilized to drive the external air flow to spray out from the heat dissipation air holes, cooling and solidifying the liquid solder dripping onto the surface of the split conveyor belt, so that the monitoring scraper can interfere with the solidified solder to achieve detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a partial three-dimensional semi-sectional schematic diagram of the overall structure of the present invention.

[0021] Figure 3 It is Figure 2 an enlarged schematic diagram of area A in

[0022] Figure 4 It is a schematic diagram of the component structure of the present invention.

[0023] Figure 5 It is a schematic diagram of the component structure of the present invention from another angle.

[0024] Figure 6 It is a three-dimensional semi-sectional schematic diagram of the component structure of the present invention.

[0025] Figure 7 It is Figure 6 an enlarged schematic diagram of area B in

[0026] Figure 8 It is Figure 7 an enlarged schematic diagram of area C in

[0027] In the figure: 1. Plasma spot welding module; 2. Preheating bin; 3. Welding bin; 4. Promotion bin; 5. Heat preservation bin; 6. Production line conveyor belt; 7. Spacing seam; 8. Split conveyor belt; 801. Split support roller; 802. Roller frame; 803. U-shaped upper frame; 804. U-shaped bottom frame; 805. Limit vertical shaft; 806. Lifting cylinder; 807. Lifting bucket plate; 808. Flank plate; 809. Pulling spring; 810. Vibration roller; 811. Convex rib; 812. Transverse central axis; 813. Driving motor; 814. Parallel pressure roller; 815. Uniform flow air chamber; 816. Heat dissipation air hole; 817. Driving air chamber; 818. Piston plate body; 819. Plate body positioning spring; 820. Counterweight part; 821. Breathing air groove; 822. Horizontal air passage; 823. External connection air passage; 824. First one-way air valve; 825. Second one-way air valve; 826. Support vertical plate; 827. Track shaft body; 828. Monitoring scraper; 829. Scraper spring; 830. Contact detection part; 101. Welding moving arm; 102. Plasma spray gun. DETAILED DESCRIPTION OF THE INVENTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 8 The present invention provides a technical solution: a brazing production line for processing radiator fins, comprising a plasma spot welding module 1 and a brazing furnace, wherein a brazing flux spraying device and a drying device are sequentially arranged between the plasma spot welding module 1 and the brazing furnace, and a production line conveyor belt 6 is arranged in the plasma spot welding module 1, the brazing flux spraying device, the drying device and the brazing furnace, and the production line conveyor belt 6 is used to transport the radiator fins, so that the radiator fins pass through the plasma spot welding module 1, the brazing flux spraying device, the drying device and the brazing furnace in sequence, and the plasma spot welding module 1 is used to spot weld and stabilize the preliminarily assembled radiator fins;

[0030] The brazing furnace comprises a preheating chamber 2, a welding chamber 3, a promotion chamber 4 and a heat preservation chamber 5 which are arranged in sequence. The preheating chamber 2, the welding chamber 3, the promotion chamber 4 and the heat preservation chamber 5 are respectively provided with position sensors for real-time detection of the position of the radiator fins.

[0031] The welding bin 3 and the promotion bin 4 have the same temperature. A spacing gap 7 is provided on the production line conveyor belt 6. A split conveyor belt 8 is provided in the spacing gap 7. Both the production line conveyor belt 6 and the split conveyor belt 8 are high temperature resistant conveyor belts, wherein the split conveyor belt 8 is a metal belt with a smooth surface, such as a stainless steel belt. The split conveyor belt 8 is located in the promotion bin 4. A lifting and vibration device is provided in the promotion bin 4. The lifting and vibration device is used to control the lifting, movement and vibration of the split conveyor belt 8. When the production line conveyor belt 6 transports the radiator fins to the promotion bin 4, the lifting and vibration device controls the split conveyor belt 8 to rise, and the radiator fins are lifted off the upper surface of the production line conveyor belt 6 by the split conveyor belt 8, and the radiator fins are driven to vibrate. At the same time, the split conveyor belt 8 transports the radiator fins by rotating. When the radiator fins leave the promotion bin 4, the split conveyor belt 8 moves down to release the radiator fins.

[0032] The plasma spot welding module 1 comprises a welding movable arm 101 and a plasma spray gun 102 . The welding movable arm 101 is used to control the movement of the plasma spray gun 102 , and the plasma spot welding is performed on the radiator fins through the plasma spray gun 102 .

[0033] The lifting and vibrating device includes a split support roller 801, a roller frame 802, and a U-shaped upper frame 803. The split support roller 801 supports the split conveyor belt 8. The rotation of the split support roller 801 drives the split conveyor belt 8 to rotate, realizing the transportation of radiator fins. A roller frame 802 is arranged outside the split support roller 801. The U-shaped upper frame 803 is fixedly installed with the roller frame 802. The lifting of the U-shaped upper frame 803 drives the split conveyor belt 8 to move up and down. A U-shaped bottom frame 804 is arranged below the U-shaped upper frame 803, and the U-shaped bottom frame 804 is fixedly installed with the promotion bin 4.

[0034] A limit vertical shaft 805 is fixedly installed above the U-shaped bottom frame 804. The limit vertical shaft 805 passes through the U-shaped upper frame 803 to limit the U-shaped upper frame 803. A lifting cylinder 806 is fixedly installed on the U-shaped bottom frame 804. A lifting bucket plate 807 is fixedly arranged on the telescopic shaft of the lifting cylinder 806. The lifting of the lifting bucket plate 807 is controlled by the lifting cylinder 806.

[0035] A side wing plate 808 is fixedly arranged on the U-shaped upper frame 803. A tension spring 809 is connected below the side wing plate 808. The lower end of the tension spring 809 is fixedly connected with the lifting bucket plate 807. The tension spring 809 exerts an elastic pulling force on the side wing plate 808 to move it towards the lifting bucket plate 807. A vibrating roller 810 is arranged below the U-shaped upper frame 803. Convex rib strips 811 are fixedly arranged on the surface of the vibrating roller 810. When the vibrating roller 810 rotates, the U-shaped upper frame 803 can be intermittently pushed upwards through the convex rib strips 811. A transverse central shaft 812 is coaxially and fixedly arranged in the vibrating roller 810. The transverse central shaft 812 is limited and passes through the side wall of the lifting bucket plate 807. A driving motor 813 is fixedly arranged on the lifting bucket plate 807. The driving motor 813 drives the vibrating roller 810 to rotate through the transverse central shaft 812.

[0036] A parallel pressure roller 814 is arranged on the U-shaped upper frame 803. The parallel pressure roller 814 guides and supports the split conveyor belt 8, making a part of the split conveyor belt 8 pass parallel above the U-shaped upper frame 803. A uniform flow air cavity 815 is opened inside the U-shaped upper frame 803. Heat dissipation air holes 816 are penetrated and opened on the inner upper surface of the uniform flow air cavity 815. The heat dissipation air holes 816 are used to cool the part of the split conveyor belt 8 passing parallel above the U-shaped upper frame 803. A driving air cavity 817 is opened inside the U-shaped upper frame 803. A piston plate body 818 is arranged inside the driving air cavity 817. The piston plate body 818 is in sealing contact with the inner wall surface of the driving air cavity 817. Plate positioning springs 819 are arranged above and below the piston plate body 818. A counterweight part 820 is fixedly arranged on the piston plate body 818. The plate positioning springs 819 cooperate with each other to elastically support the piston plate body 818, making the piston plate body 818 in the middle position of the driving air cavity 817.

[0037] The lower surface of the driving air chamber 817 is penetrated downwardly with a breathing air groove 821. A horizontal air passage 822 and an external connecting air passage 823 are provided inside the U-shaped upper bracket 803. The horizontal air passage 822 communicates with the upper part of the driving air chamber 817. The horizontal air passage 822 communicates with the external connecting air passage 823. The upper end of the external connecting air passage 823 communicates with the uniform flow air chamber 815. A first one-way air valve 824 and a second one-way air valve 825 are provided inside the external connecting air passage 823. The communication port between the horizontal air passage 822 and the external connecting air passage 823 is between the first one-way air valve 824 and the second one-way air valve 825. The first one-way air valve 824 enables the air flow to flow unidirectionally into the uniform flow air chamber 815, and the second one-way air valve 825 enables the air flow to flow unidirectionally from the outside into the external connecting air passage 823.

[0038] A support vertical plate 826 is fixedly provided above the U-shaped upper bracket 803. A track shaft body 827 is fixedly provided on the support vertical plate 826. A monitoring scraping plate 828 is slidably and limitably installed outside the track shaft body 827. The monitoring scraping plate 828 contacts the surface of the split conveyor belt 8. A scraping spring 829 is provided between the monitoring scraping plate 828 and the support vertical plate 826. A contact detection part 830 is fixedly provided on the support vertical plate 826; when there is solidified brazing filler metal on the surface of the split conveyor belt 8, the contact between the solidified brazing filler metal and the monitoring scraping plate 828 can push the monitoring scraping plate 828 to move towards the contact detection part 830, thereby realizing detection. The contact detection part 830 is composed of non-conductive conductors. When the monitoring scraping plate 828 contacts the contact detection part 830, the conductors are conducted through the monitoring scraping plate 828, thereby realizing the emission of a switching signal.

[0039] A soldering process for a soldering production line for processing radiator fins. First, the preliminarily assembled radiator fins are spot-welded and stabilized by the plasma spot-welding module 1. After passing through flux spraying and drying in sequence, soldering is carried out in a soldering furnace. After reaching the promotion chamber 4 in the soldering furnace, the radiator fins are driven to vibrate.

[0040] For the soldering production line for processing radiator fins of the present invention, when in use, the preliminarily assembled radiator fins pre-placed with brazing filler metal are placed on the production line conveyor belt 6. The production line conveyor belt 6 transports the radiator fins, so that the radiator fins pass through the plasma spot-welding module 1. Through preset programming and visual positioning, the welding moving arm 101 is controlled to work. The plasma spray gun 102 spot-welds and stabilizes the parts of the preliminarily assembled radiator fins with a high risk of misalignment under vibration. The plasma spray gun 102 causes the gas to be dissociated by arc heating, and is compressed when passing through the water-cooled nozzle at high speed, increasing the energy density and degree of dissociation, and forming a plasma arc to perform spot welding on the parts with a risk of misalignment. The specific selection of the parts with a high risk of misalignment under vibration needs to be determined by combining multiple experimental observations according to different radiator fin models.

[0041] After the spot welding is completed, the flux spraying and drying are completed in sequence through the flux spraying equipment and the drying equipment. The flux spraying equipment and the drying equipment are both equipment under the prior art and will not be described in detail in this application.

[0042] After arriving at the brazing furnace, the radiator fins are first preheated in the preheating bin 2, and then enter the welding bin 3. The high temperature in the welding bin 3 makes the preset brazing material melt, and then enter the promotion bin 4. When the radiator fins arrive in the promotion bin 4, the lifting and vibration device controls the split conveyor belt 8 to rise, and the radiator fins are lifted off the upper surface of the production line conveyor belt 6 by the split conveyor belt 8, and the radiator fins are driven to vibrate. The split conveyor belt 8 is provided with at least two groups, which can stably support the radiator fins; at the same time, the split conveyor belt 8 transports the radiator fins by rotation. When the radiator fins leave the promotion bin 4, the split conveyor belt 8 moves down to release the radiator fins, so that the production line conveyor belt 6 continues to transport the split conveyor belt 8, and then after moderate insulation through the insulation bin 5, the brazing is completed.

[0043] In the above process, the lifting and vibrating device is as follows Figure 4 and Figure 5 As shown in , the lifting cylinder 806 extends to drive the lifting plate 807 to move upward, so that the U-shaped upper frame 803 and the split support roller 801 move upward, thereby causing the split conveyor belt 8 to move upward, as shown in FIG. Figure 7 As shown in the figure, the vibration roller 810 rotates at a high speed, and intermittently squeezes and drives the U-shaped upper frame 803 upward through the convex ribs 811, and cooperates with the elastic downward pull of the tension spring 809, so that the U-shaped upper frame 803 is in a high-frequency up and down vibration state, thereby driving the radiator fins to vibrate.

[0044] When in use, the external air path 823 is connected to the low-temperature air of the external environment through an insulated pipe. During the high-frequency up and down vibration of the U-shaped upper frame 803, the piston plate body 818 will move up and down relative to the U-shaped upper frame 803 through the elastic support of the plate body positioning spring 819. When the piston plate body 818 moves downward, the upper part of the piston plate body 818 is under negative pressure, and the low-temperature air of the external environment will be sucked into the transverse air path 822 and the upper space of the piston plate body 818 through the second one-way air valve 825. When the piston plate body 818 moves upward, the piston plate body 818 moves upward and squeezes to create positive pressure on the upper part. The positive-pressure gas on the upper part of the piston plate body 818 enters the uniform flow air cavity 815 through the first one-way air valve 824, and is finally ejected through the heat dissipation air hole 816 to cool the surface of the split conveyor belt 8.

[0045] If the vibration intensity is too high, there is a risk that the molten liquid solder in the splicing gap of the radiator fin component will be vibrated and dropped. Taking the split conveyor belt 8 as the detection component, when the liquid solder drops onto the split conveyor belt 8, as the split conveyor belt 8 rotates, when the part of the split conveyor belt 8 where the solder drops moves to the position of the heat dissipation air hole 816, it is cooled and solidified by the low-temperature gas ejected through the heat dissipation air hole 816. As shown in Figure 8 shown in Figure 8 , when passing through the monitoring scraper 828, it interferes with the monitoring scraper 828, and will squeeze and push the monitoring scraper 828 to move towards the contact detection part 830, so that the monitoring scraper 828 contacts the contact detection part 830, thereby realizing detection. Finally, the monitoring scraper 828 stops moving and scrapes off the solidified solder. Since the transmission length of the production line conveyor belt 6 is too long and there are many foreign objects adhered to the surface, the probability of false alarm is relatively high when using the surface of the production line conveyor belt 6 as the detection component.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brazing production line for processing radiator fins, comprising a plasma spot welding module (1) and a brazing furnace, wherein a brazing agent spraying device and a drying device are sequentially arranged between the plasma spot welding module (1) and the brazing furnace, and characterized in that: The plasma spot welding module (1), the flux spraying device, the drying device and the brazing furnace are provided with a production line conveyor belt (6), the production line conveyor belt (6) is used to transport the radiator fins, so that the radiator fins pass through the plasma spot welding module (1), the flux spraying device, the drying device and the brazing furnace in sequence, and the plasma spot welding module (1) is used to spot weld and stabilize the preliminarily assembled radiator fins; The brazing furnace comprises a preheating chamber (2), a welding chamber (3), a promotion chamber (4) and a heat preservation chamber (5) which are arranged in sequence. The welding chamber (3) and the promotion chamber (4) have the same temperature. A spacing slit (7) is provided on the production line conveyor belt (6). A split conveyor belt (8) is provided in the spacing slit (7). The split conveyor belt (8) is located in the promotion chamber (4). A lifting and vibration device is provided in the promotion chamber (4). The lifting and vibration device is used to control the lifting, movement and vibration of the split conveyor belt (8). When the production line conveyor belt (6) transports the radiator fins to the promotion chamber (4), the lifting and vibration device controls the split conveyor belt (8) to rise, and the radiator fins are lifted off the upper surface of the production line conveyor belt (6) by the split conveyor belt (8), and the radiator fins are driven to vibrate. At the same time, the split conveyor belt (8) transports the radiator fins by rotating. When the radiator fins leave the promotion chamber (4), the split conveyor belt (8) moves downward to release the radiator fins. The lifting and vibrating device comprises a split support roller (801), a roller frame (802) and a U-shaped upper frame (803); the split support roller (801) supports the split conveyor belt (8), and the split conveyor belt (8) is driven to rotate by the rotation of the split support roller (801), so as to transport the radiator fins; the split support roller (801) is provided with a roller frame (802) on the outside; the U-shaped upper frame (803) is fixedly installed with the roller frame (802); the lifting and lowering of the U-shaped upper frame (803) drives the split conveyor belt (8) to move upward and downward; a U-shaped bottom frame (804) is provided below the U-shaped upper frame (803); the U-shaped bottom frame (804) is fixedly installed with the promotion bin (4); The U-shaped upper frame (803) is provided with a uniform flow air cavity (815) inside, and a heat dissipation air hole (816) is provided through the inner upper surface of the uniform flow air cavity (815). The heat dissipation air hole (816) is used to cool down the local area where the split conveyor belt (8) passes parallel to the upper part of the U-shaped upper frame (803). The U-shaped upper frame (803) is provided with a driving air cavity (817) inside, and a piston plate body (818) is provided inside the driving air cavity (817). The piston plate body (818) is in sealing contact with the inner wall surface of the driving air cavity (817), and plate body positioning springs (818) are provided above and below the piston plate body (818). 19), a counterweight portion (820) is fixedly provided on the piston plate body (818), and the plate body positioning springs (819) cooperate with each other to elastically support the piston plate body (818), so that the piston plate body (818) is located in the middle position of the driving air cavity (817); a breathing air groove (821) is opened downwardly through the lower surface of the driving air cavity (817), and a transverse air path (822) and an external air path (823) are opened inside the U-shaped upper frame (803), the transverse air path (822) is connected to the upper part of the driving air cavity (817), the transverse air path (822) is connected to the external air path (823), and the external air path (823) is connected to the driving air cavity (817). The upper end of the path (823) is connected to the uniform flow air cavity (815), and the interior of the externally connected air path (823) is provided with a first one-way air valve (824) and a second one-way air valve (825). The connecting port between the transverse air path (822) and the externally connected air path (823) is located between the first one-way air valve (824) and the second one-way air valve (825). The first one-way air valve (824) allows the air flow to flow unidirectionally into the uniform flow air cavity (815), and the second one-way air valve (825) allows the air flow to flow unidirectionally from the outside to the externally connected air path (823). A supporting vertical plate (826) is fixedly provided above the U-shaped upper frame (803). A track shaft (827) is fixedly arranged on the support vertical plate (826), and a monitoring scraper (828) is installed on the external sliding limit of the track shaft (827). The monitoring scraper (828) contacts the surface of the split conveyor belt (8), and a scraper spring (829) is arranged between the monitoring scraper (828) and the support vertical plate (826). A contact detection part (830) is fixedly arranged on the support vertical plate (826); when solidified solder exists on the surface of the split conveyor belt (88), the solidified solder contacts the monitoring scraper (828) and can push the monitoring scraper (828) to move toward the contact detection part (830), thereby realizing detection.

2. A brazing production line for radiator fin processing according to claim 1, characterized in that: The plasma spot welding module (1) comprises a welding movable arm (101) and a plasma spray gun (102); the welding movable arm (101) is used to control the movement of the plasma spray gun (102), and plasma spot welding is performed on the radiator fins through the plasma spray gun (102).

3. A brazing production line for radiator fin processing according to claim 1, characterized in that: A limit vertical shaft (805) is fixedly installed above the U-shaped base frame (804), and the limit vertical shaft (805) passes through the U-shaped upper frame (803) to limit the position of the U-shaped upper frame (803). A lifting cylinder (806) is fixedly installed on the U-shaped base frame (804), and a lifting pocket plate (807) is fixedly arranged on the telescopic shaft of the lifting cylinder (806), and the lifting and lowering movement of the lifting pocket plate (807) is controlled by the lifting cylinder (806).

4. A brazing production line for processing radiator fins according to claim 3, characterized in that: A side wing plate (808) is fixedly provided on the U-shaped upper frame (803), and a tension spring (809) is connected to the lower part of the side wing plate (808). The lower end of the tension spring (809) is connected and fixed to the lifting pocket plate (807). The tension spring (809) applies an elastic tension force to the side wing plate (808) to move toward the lifting pocket plate (807). A vibration roller (810) is provided below the U-shaped upper frame (803), and a convex rib (811) is fixedly provided on the surface of the vibration roller (810). When the vibration roller (810) rotates, the convex rib (811) can intermittently squeeze and push the U-shaped upper frame (803) upward.

5. A brazing production line for processing radiator fins according to claim 4, characterized in that: A transverse central axis (812) is coaxially fixedly disposed in the vibration roller (810), the transverse central axis (812) is limitedly inserted through the side wall of the lifting pocket plate (807), a driving motor (813) is fixedly disposed on the lifting pocket plate (807), and the driving motor (813) drives the vibration roller (810) to rotate via the transverse central axis (812).

6. A brazing production line for processing radiator fins according to claim 5, characterized in that: The U-shaped upper frame (803) is provided with parallel pressure rollers (814), and the parallel pressure rollers (814) guide and support the split conveyor belt (8), so that a part of the split conveyor belt (8) passes in parallel above the U-shaped upper frame (803).

7. A welding process for a brazing production line for processing radiator fins according to any one of claims 1 to 6, characterized in that: First, the preliminarily assembled radiator fins are spot welded and stabilized by a plasma spot welding module (1), and then brazed in a brazing furnace after being sprayed with brazing agent and dried. After reaching a promotion chamber (4) in the brazing furnace, the radiator fins are driven to vibrate.

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