Brazing production line for radiator fin machining and welding technology of brazing production line

Abstract

The invention relates to the technical field of brazing, in particular to a brazing production line for radiator fin machining and a welding process thereof.The brazing production line comprises a plasma spot welding module and a brazing furnace, and brazing flux spraying equipment and drying equipment are sequentially arranged between the plasma spot welding module and the brazing furnace; a production line conveying belt is arranged in the plasma spot welding module, the brazing flux spraying device, the drying device and the brazing furnace and used for conveying radiator fins. The brazing filler metal in the radiator fins is melted in the welding bin, then the radiator fins are driven to vibrate in the promoting bin, and therefore when the liquid brazing filler metal flows into base metal gaps, the constraint of surface tension can be broken through moderate vibration.

Description

Technical Field

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

[0002] The production process of radiator fins usually starts with a preliminary assembly, where fins, flat tubes, condenser tubes and other components are pre-assembled together, and brazing filler metal is pre-placed in the gaps of the assembly. After flux spraying and drying, the filler metal is sent to 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. The welding is completed after cooling. This method can meet most production requirements, but there are still some defects for higher processing quality requirements. Liquid brazing filler metal melted at high temperature will be hindered by surface tension, making it difficult to quickly and smoothly fill the entire gap. If there is air or other gas remaining in the gap, it will hinder the flow and spreading of the brazing filler metal, which may cause uneven filling of the brazing filler metal and produce defects such as pores. Summary of the invention

[0003] The object of the present invention is to provide a brazing production line for radiator fin processing and a welding process thereof, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a brazing production line for processing radiator fins, comprising a plasma spot welding module and a brazing furnace, wherein a brazing flux spraying device and a drying device are sequentially arranged between the plasma spot welding module and the brazing furnace, and 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 to transport radiator fins, so that the radiator fins pass through the plasma spot welding module, the brazing flux spraying device, the drying device and the brazing furnace in sequence, and the plasma spot welding module is used to spot weld and stabilize the preliminarily assembled radiator fins; The brazing furnace includes a preheating bin, a welding bin, a promotion bin and an insulation bin which are arranged in sequence. The welding bin and the promotion bin have the same temperature. A spacing gap is opened on the production line conveyor belt, and a split conveyor belt is arranged in the spacing gap. The split conveyor belt is located in the promotion bin. A lifting and vibration device is arranged in the promotion bin, and the lifting and vibration device is used to control the lifting and vibration of the split conveyor belt. When the production line conveyor belt transports the radiator fins to the promotion bin, the lifting and vibration device controls the split conveyor belt to rise, and lifts the radiator fins off the upper surface of the production line conveyor belt through the split conveyor belt, and drives the radiator fins to vibrate. At the same time, the split conveyor belt transports the radiator fins by rotation, and when the radiator fins leave the promotion bin, the split conveyor belt moves down to release the radiator fins.

[0005] The plasma spot welding module comprises a welding movable arm and a plasma spray gun. The welding movable arm is used to control the movement of the plasma spray gun, and plasma spot welding is performed on the radiator fins through the plasma spray gun.

[0006] The lifting and vibration device includes a split support roller, a roller frame and a U-shaped upper frame. The split support roller supports the split conveyor belt. The rotation of the split support roller drives the split conveyor belt to rotate, so as to realize the transportation of the radiator fins. The outside of the split support roller is provided with a roller frame. The U-shaped upper frame is fixedly installed with the roller frame. The lifting and lowering of the U-shaped upper frame drives the split conveyor belt to lift and lower. A U-shaped base frame is provided below the U-shaped upper frame, and the U-shaped base frame is fixedly installed with the promotion bin.

[0007] A limiting vertical shaft is fixedly installed on the upper part of the U-shaped base frame, and the limiting vertical shaft passes through the U-shaped upper frame to limit the U-shaped upper frame. A lifting cylinder is fixedly installed on the U-shaped base frame, and a lifting pocket plate is fixedly arranged on the telescopic shaft of the lifting cylinder. The lifting and lowering movement of the lifting pocket plate is controlled by the lifting cylinder.

[0008] The U-shaped upper frame is fixedly provided with side wing plates, and a tension spring is connected to the lower part of the side wing plates. The lower end of the tension spring is fixedly connected to the lifting pocket plate, and the tension spring applies an elastic tension to the side wing plates to move toward the lifting pocket plate. A vibration roller is provided below the U-shaped upper frame, and a convex rib is fixedly provided on the surface of the vibration roller. When the vibration roller rotates, the convex rib can intermittently squeeze and push the U-shaped upper frame upward.

[0009] A transverse central axis is coaxially fixedly arranged in the vibration roller, and the transverse central axis is limitedly inserted through the side wall of the lifting pocket plate. A driving motor is fixedly arranged on the lifting pocket plate, and the driving motor drives the vibration roller to rotate through the transverse central axis.

[0010] The U-shaped upper frame is provided with parallel pressure rollers, and the parallel pressure rollers guide and support the split conveyor belt so that a part of the split conveyor belt passes in parallel over the top of the U-shaped upper frame; an even flow air cavity is provided inside the U-shaped upper frame, and heat dissipation holes are provided through the inner upper surface of the even flow air cavity, and the heat dissipation holes are used to cool down the part of the split conveyor belt passing in parallel over the top of the U-shaped upper frame; a driving air cavity is provided inside the U-shaped upper frame, and a piston plate body is provided inside the driving air cavity, and the piston plate body is in sealing contact with the inner wall surface of the driving air cavity; plate body positioning springs are provided above and below the piston plate body, and a counterweight part is fixedly provided on the piston plate body, and the plate body positioning springs cooperate with each other to elastically support the piston plate body, so that the piston plate body is in the middle position of the driving air cavity.

[0011] A breathing air groove is provided on the lower surface of the driving air cavity and penetrates downward therethrough; a transverse air path and an external air path are provided inside the U-shaped upper frame; the transverse air path is connected to the upper part of the driving air cavity, the transverse air path is connected to the external air path, the upper end of the external air path is connected to the uniform flow air cavity, a first one-way air valve and a second one-way air valve are provided inside the external air path, the connecting port between the transverse air path and the external air path is between the first one-way air valve and the second one-way air valve, the first one-way air valve allows the airflow to flow unidirectionally into the uniform flow air cavity, and the second one-way air valve allows the airflow to flow unidirectionally from the outside to the external air path.

[0012] A supporting upright is fixedly provided above the U-shaped upper frame, a track shaft is fixedly provided on the supporting upright, a monitoring scraper is installed on the external sliding limit of the track shaft, the monitoring scraper is in contact with the surface of the split conveyor belt, a scraper spring is provided between the monitoring scraper and the supporting upright, and a contact detection part is fixedly provided on the supporting upright; when solidified brazing material exists on the surface of the split conveyor belt, the solidified brazing material contacts the monitoring scraper and can push the monitoring scraper to move toward the contact detection part, thereby realizing detection.

[0013] A welding process for a brazing production line for processing radiator fins, firstly spot welding and stabilizing the preliminarily assembled radiator fins through a plasma spot welding module, then brazing in a brazing furnace after brazing agent spraying and drying, and driving the radiator fins to vibrate after reaching a promotion bin in the brazing furnace.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The brazing production line for processing radiator fins of the present invention cooperates with the promotion bin, the split conveyor belt and the lifting and vibrating device to make the brazing material in the radiator fins melt in the welding bin, and then drive the radiator fins to vibrate in the promotion bin, so that when the liquid brazing material flows into the gap of the base material, it can break the restraint of the surface tension through moderate vibration, making it easier for the brazing material to break through the obstacles and enter some narrow gaps, and the vibration wave is transmitted in the component, the gas is disturbed and will be discharged along the flow direction of the brazing material, reducing the uneven filling of the brazing material caused by gas obstruction, generating defects such as pores, and greatly improving the brazing quality of the radiator fins; the key points of the initially assembled radiator fins are pre-spot welded and stabilized by the plasma spot welding module, thereby avoiding vibration damage to the assembly accuracy and avoiding the occurrence of misalignment problems.

[0015] The present invention can simultaneously detect in real time whether liquid solder is dripping from the surface of the split conveyor belt by cooperating with the heat dissipation pores and monitoring scrapers and other structures. When liquid solder is dripping from the surface of the split conveyor belt, it indicates that the vibration intensity is too large, and an alarm is given in time.

[0016] By cooperating with the drive air cavity, piston plate body and plate body positioning spring and other structures, 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 holes, so as to cool and solidify the liquid solder dripping onto the surface of the split conveyor belt, so that the monitoring scraper can interfere with the solidified solder to realize detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a partial three-dimensional half-section schematic diagram of the overall structure of the present invention.

[0019] Figure 3 for Figure 2 A magnified schematic diagram of area A in the middle.

[0020] Figure 4 It is a schematic diagram of the structure of parts of the present invention.

[0021] Figure 5 It is a schematic diagram of the component structure of the present invention from another angle.

[0022] Figure 6 It is a three-dimensional half-section schematic diagram of the component structure of the present invention.

[0023] Figure 7 for Figure 6 Enlarged schematic diagram of area B in the middle.

[0024] Figure 8 for Figure 7 Enlarged schematic diagram of area C in the middle.

[0025] In the figure: 1. Plasma spot welding module; 2. Preheating chamber; 3. Welding chamber; 4. Promotion chamber; 5. Insulation chamber; 6. Production line conveyor belt; 7. Spacer seam; 8. Split conveyor belt; 801. Split support roller; 802. Roller frame; 803. U-shaped upper frame; 804. U-shaped bottom frame; 805. Limiting vertical axis; 806. Lifting cylinder; 807. Lifting pocket plate; 808. Side wing plate; 809. Tension spring; 810. Vibrating roller; 811. Convex rib; 812. Transverse center axis; 813. Driving motor; 814. Flat Line pressure roller; 815, uniform flow air cavity; 816, heat dissipation air hole; 817, driving air cavity; 818, piston plate body; 819, plate body positioning spring; 820, counterweight part; 821, breathing air groove; 822, transverse air path; 823, external air path; 824, first one-way air valve; 825, second one-way air valve; 826, supporting 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

[0026] 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.

[0027] 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; 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.

[0028] 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.

[0029] 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 .

[0030] 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, thereby realizing the transportation of the radiator fins. The roller frame 802 is arranged on the outside of the split support roller 801. 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 lift and lower. A U-shaped base frame 804 is arranged below the U-shaped upper frame 803. The U-shaped base frame 804 is fixedly installed with the promotion bin 4.

[0031] A limiting vertical shaft 805 is fixedly installed on the top of the U-shaped base frame 804, and the limiting 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 base frame 804, and a lifting pocket plate 807 is fixedly provided on the telescopic shaft of the lifting cylinder 806. The lifting and lowering movement of the lifting pocket plate 807 is controlled by the lifting cylinder 806.

[0032] A side wing plate 808 is fixedly provided on the U-shaped upper frame 803, and a tension spring 809 is connected and provided below 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. 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. A transverse central axis 812 is coaxially fixedly provided 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 provided on the lifting pocket plate 807. The driving motor 813 drives the vibration roller 810 to rotate through the transverse central axis 812.

[0033] The U-shaped upper frame 803 is provided with parallel pressure rollers 814, which 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. 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 upper surface of the uniform flow air cavity 815. The heat dissipation air hole 816 is used to cool down the part of the split conveyor belt 8 passing in parallel above the U-shaped upper frame 803. A driving air cavity 817 is opened inside, and 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 body 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 body positioning springs 819 cooperate with each other to elastically support the piston plate body 818, so that the piston plate body 818 is in the middle position of the driving air cavity 817.

[0034] A breathing air groove 821 is provided on the lower surface of the driving air cavity 817 and penetrates downward. A transverse air path 822 and an external air path 823 are provided inside the U-shaped upper frame 803. The transverse air path 822 is connected to the upper part of the driving air cavity 817, and the transverse air path 822 is connected to the external air path 823. The upper end of the external air path 823 is connected to the uniform flow air cavity 815. A first one-way air valve 824 and a second one-way air valve 825 are provided inside the external air path 823. The connecting port between the transverse air path 822 and the external air path 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 allows the airflow to flow unidirectionally into the uniform flow air cavity 815, and the second one-way air valve 825 allows the airflow to flow unidirectionally from the outside to the external air path 823.

[0035] A support vertical plate 826 is fixedly installed above the U-shaped upper frame 803, and a track shaft 827 is fixedly installed on the support vertical plate 826. 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. A scraper spring 829 is arranged between the monitoring scraper 828 and the support vertical plate 826. A contact detection part 830 is fixedly installed on the support vertical plate 826; when there is solidified solder on the surface of the split conveyor belt 8, the solidified solder contacts the monitoring scraper 828 to push the monitoring scraper 828 to move toward the contact detection part 830, thereby realizing detection. The contact detection part 830 is composed of conductors that are not conductive to each other. When the monitoring scraper 828 contacts the contact detection part 830, the conductor is connected through the monitoring scraper 828, thereby realizing the sending of a switch signal.

[0036] A welding process for a brazing production line for processing radiator fins, firstly spot welding the preliminarily assembled radiator fins through a plasma spot welding module 1, then brazing in a brazing furnace after flux spraying and drying, and driving the radiator fins to vibrate after reaching a promotion chamber 4 in the brazing furnace.

[0037] The brazing production line for processing radiator fins of the present invention, when in use, places the radiator fins that are preliminarily assembled and pre-set with brazing materials on the production line conveyor belt 6, and the production line conveyor belt 6 transports the radiator fins, so that the radiator fins pass through the plasma spot welding module 1, and through preset programming and visual positioning, the welding mobile arm 101 is controlled to work, and the plasma spray gun 102 is used to spot weld and stabilize the parts of the preliminarily assembled radiator fins that have a high risk of dislocation 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 dissociation degree, forming a plasma arc to spot weld the parts that have a risk of dislocation. The specific selection of the parts that have a high risk of dislocation under vibration needs to be determined according to different radiator fin models and combined with multiple experimental observations.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] If the vibration intensity is too high, the molten liquid solder in the gap between the fin components of the radiator is at risk of being vibrated and dripped. The split conveyor belt 8 is used as a detection component. When the liquid solder drips 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 drips moves to the heat dissipation hole 816, the low-temperature gas ejected from the heat dissipation hole 816 cools down and solidifies. Figure 8 As shown in , when passing through the monitoring scraper 828, the monitoring scraper 828 interferes with the monitoring scraper 828, which squeezes and pushes the monitoring scraper 828 toward the contact detection part 830, so that the monitoring scraper 828 contacts the contact detection part 830, thereby realizing the detection, and 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 adhering to the surface, the probability of false alarm when the surface of the production line conveyor belt 6 is used as the detection component is relatively high.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 down to release the radiator fins.

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: 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); the split conveyor belt (8) is driven to rotate by the rotation of the split support roller (801) to achieve the transportation of 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).

4. A brazing production line for processing radiator fins according to claim 3, 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).

5. A brazing production line for processing radiator fins according to claim 4, 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.

6. A brazing production line for processing radiator fins according to claim 5, 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).

7. A brazing production line for processing radiator fins according to claim 6, 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). A uniform flow air cavity (815) is provided inside the U-shaped upper frame (803), and heat dissipation holes (816) are provided through the upper surface of the inner part of the uniform flow air cavity (815). The heat dissipation holes (816) are used to cool down the part of the split conveyor belt (8) passing in parallel above the U-shaped upper frame (803). The U-shaped upper frame (803) A driving air chamber (817) is provided inside the driving air chamber (817), a piston plate (818) is provided inside the driving air chamber (817), the piston plate (818) is in sealing contact with the inner wall surface of the driving air chamber (817), plate positioning springs (819) are provided above and below the piston plate (818), a counterweight (820) is fixedly provided on the piston plate (818), and the plate positioning springs (819) cooperate with each other to elastically support the piston plate (818), so that the piston plate (818) is located in the middle position of the driving air chamber (817).

8. A brazing production line for processing radiator fins according to claim 7, characterized in that: A breathing air groove (821) is provided on the lower surface of the driving air cavity (817) and penetrates downward therethrough. A transverse air passage (822) and an external air passage (823) are provided inside the U-shaped upper frame (803). The transverse air passage (822) is communicated with the upper portion of the driving air cavity (817). The transverse air passage (822) is communicated with the external air passage (823). The upper end of the external air passage (823) is communicated with the uniform flow air cavity (815). 23) is provided with a first one-way air valve (824) and a second one-way air valve (825) inside, and the connecting port between the transverse air path (822) and the external 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 external air path (823).

9. A brazing production line for processing radiator fins according to claim 8, characterized in that: A support vertical plate (826) is fixedly arranged above the U-shaped upper frame (803), a track shaft (827) is fixedly arranged on the support vertical plate (826), a monitoring scraper (828) is installed on the external sliding limit of the track shaft (827), the monitoring scraper (828) is in contact with the surface of the split conveyor belt (8), a scraper spring (829) is arranged between the monitoring scraper (828) and the support vertical plate (826), and 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 (8), 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.

10. A welding process for a brazing production line for processing radiator fins according to any one of claims 1 to 9, 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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