Full-automatic brazing machine for radiator

Abstract

The invention relates to the technical field of brazing machines, and discloses a radiator full-automatic brazing machine which comprises a brazing machine body, a mounting part mounted on the brazing machine body and used for mounting a brazing tool and a temperature control tool, a feeding part mounted on the mounting part and used for secondary heating of conveyed brazing filler metal, and a temperature control part mounted on the feeding part and used for secondary heating of the brazing filler metal. The feeding pipe is used for conveying the brazing filler metal, the material spraying nozzle is used for spraying out the brazing filler metal, the thermal compensation part is installed on the material spraying nozzle, thermal compensation is adopted for preventing heat loss, a piston, a spring, a compensation pipe and other structures of the thermal compensation part work cooperatively, the piston descends due to high temperature and high pressure in the feeding tank, the piston extrudes air due to the counter-acting force of the spring, and the brazing filler metal is sprayed out. When the piston is pressed down, hot air is sucked into the air inlet hole of the compensation pipe, heat loss compensation is conducted on the brazing filler metal in the material spraying nozzle, it is guaranteed that the temperature is appropriate when the brazing filler metal is sprayed out, the strength and sealing performance of a welding joint are improved, and the problems of insufficient soldering, unsoldering and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of brazing machines, and particularly to a fully automatic brazing machine for radiators. Background Art

[0002] In modern industrial production, as a key heat exchange device, radiators are widely used in many fields such as electronics, automobiles, and power. With the continuous improvement of the performance and quality requirements of radiators in various industries, the manufacturing process of radiators is also constantly innovating. Among them, brazing, as an important process for connecting various components of radiators, directly affects the overall performance and service life of radiators.

[0003] To overcome the deficiencies of traditional manual brazing, a fully automatic brazing machine for radiators has emerged. With the help of automation technology, this device can realize the automated operation of the radiator welding process, significantly improving the welding efficiency and quality stability. For example, on some large-scale automobile radiator production lines, the fully automatic brazing machine can complete thousands of solder joints per hour, greatly improving the production efficiency. At the same time, automated welding reduces the interference of human factors, making the welding quality more stable and reliable, and effectively reducing the scrap rate.

[0004] In the solder supply link, the nozzle is equivalent to a medium for heat conduction. When facing local brazing of different radiators, such as brazing the fins of a radiator, the nozzle needs to reach the root of the fins, which requires a longer nozzle design. During the process of the solder spraying from the nozzle to the workpiece, the contact area and time with the inner wall of the nozzle will increase. Since the nozzle itself exchanges heat with the surrounding environment and has a relatively low temperature, the heat of the solder will continuously dissipate to the surrounding environment through the nozzle wall, resulting in a decrease in the solder temperature and affecting the subsequent bonding quality with the radiator substrate. Therefore, a fully automatic brazing machine for radiators is proposed to solve the above problems. Summary of the Invention

[0005] (1) Technical Problems to be Solved Aiming at the deficiencies of the prior art, the present invention provides a fully automatic brazing machine for radiators, which solves the problem that when the nozzle is relatively long, the path of the solder in contact with the air during the spraying process becomes longer, accelerating the cooling rate of the solder, resulting in the temperature of the solder reaching the workpiece being lower than the optimal bonding temperature range, thereby affecting the bonding effect.

[0006] (2) Technical Solutions To achieve the above object, the present invention provides the following technical solution: A fully automatic brazing machine for radiators, including a brazing machine, an installation part is installed on the brazing machine for installing brazing tools and temperature control tools, a feeding part is installed on the installation part for secondary heating of the transported brazing filler metal, a temperature control part is installed on the feeding part for adjusting the temperature of the brazing filler metal, a feeding pipe is used for transporting the brazing filler metal, a spraying nozzle is used for spraying the brazing filler metal, and a thermal compensation part is installed on the spraying nozzle to compensate for the heat loss of the brazing filler metal in the spraying nozzle by heating temperature.

[0007] Preferably, the installation part includes an installation frame, a bolt one is arranged on the installation frame, the installation frame is threadedly connected to the multi-axis robotic arm of the brazing machine through the bolt one, the bottom of the installation frame is fixedly connected with a connecting frame, the connecting frame is of a U-shaped structure, and a feeding hole one and an installation hole one are respectively opened on the two ear ends of the connecting frame, and bolt two are respectively arranged on the two ear ends of the connecting frame.

[0008] Preferably, the feeding part includes a feeding tank, the top of the feeding tank is open, a tank cover is installed at the top opening of the feeding tank, a heat dissipation hole is opened on the tank cover, and connecting ends are fixedly connected to the top of the tank cover and the bottom outer wall of the feeding tank respectively, and threaded holes corresponding to the bolt two are opened on the two connecting ends, and the connecting frame is threadedly connected to the threaded holes of the two connecting ends through the bolt two respectively.

[0009] Preferably, a feeding hole two is opened at the center of the tank cover and the center of the connecting end connected thereto, the two feeding hole twos are arranged in alignment with the feeding hole one, and an installation hole two is opened at the center of the bottom of the feeding tank and the center of the connecting end connected thereto, and the two installation hole twos are arranged in alignment with the installation hole one.

[0010] Preferably, the temperature control part includes an insulating sleeve, the insulating sleeve is fixedly sleeved on the outer wall of the feeding tank, an induction coil is installed on the inner wall of the tank opening of the feeding tank, a chassis is installed between the outer wall of the insulating sleeve and the inner wall of the connecting frame, a control panel is installed on the outer wall of the chassis, and fan holes are opened on both sides of the outer wall of the insulating sleeve, and heat dissipation fans are installed in the two fan holes.

[0011] Preferably, a temperature sensor and a power supply are installed in the chassis, both ends of the induction coil are fixedly penetrated through the feeding tank and the insulating sleeve and electrically connected to the power supply, the temperature sensor is electrically connected to the two heat dissipation fans, and the power supply, the temperature sensor and the two heat dissipation fans are all electrically connected to the control panel.

[0012] Preferably, the feeding pipe is an L-shaped elbow pipe, one end of the feeding pipe extends between the installation frame and the connecting frame, and the other end of the feeding pipe is installed on the inner walls of the feeding hole one and the feeding hole two and extends into the feeding tank.

[0013] Preferably, the top end of the spray nozzle is communicatively connected to the extended end of the feed pipe, and the bottom end of the spray nozzle movably penetrates through the second mounting hole and the first mounting hole and extends downward to the outside of the connecting frame.

[0014] Preferably, the thermal compensation part includes a piston. The piston fits against the inner wall of the feeding tank and is located below the induction coil. The middle part of the piston is slidably sleeved on the outer wall of the spray nozzle and is provided with through holes around it. A spring is elastically connected between the bottom of the piston and the bottom of the inner wall of the feeding tank.

[0015] Preferably, the outer wall of the extended end of the spray nozzle is connected with pipe sleeves around it. Each pipe sleeve is internally provided with a compensation pipe. The top end of each compensation pipe extends into the feeding tank and is sealed. The top end of each compensation pipe is respectively slidably connected to the inner wall of the corresponding through hole and is lower than the upper orifice of the through hole. Each compensation pipe movably penetrates through the first mounting hole and the second mounting hole and fits against the spray nozzle. A heat insulation sleeve is fixedly sleeved on the outer wall of the compensation pipe. An air inlet hole is provided on the outer wall of the top end of each compensation pipe.

[0016] (III) Beneficial effects Compared with the prior art, the present invention provides a fully automatic brazing machine for radiators, having the following beneficial effects: 1. For this fully automatic brazing machine for radiators, thermal compensation is adopted to prevent heat dissipation. Structures such as the piston, spring, and compensation pipe in the thermal compensation part work together. The high temperature and high pressure in the feeding tank cause the piston to descend, and the reaction force of the spring makes the piston squeeze air to accelerate heat dissipation. When the piston presses down, the air inlet holes of the compensation pipes suck in hot air to compensate for the heat loss of the brazing material in the spray nozzle, ensuring that the temperature of the brazing material is appropriate when it is sprayed, improving the strength and tightness of the welded joint, and reducing problems such as false soldering and de-soldering.

[0017] 2. For this fully automatic brazing machine for radiators, secondary heating and precise temperature control are adopted. The feeding tank in the feeding part and the induction coil in the temperature control part cooperate to perform secondary heating on the conveyed brazing material to make up for the heat loss during the conveying process. The K-type thermocouple in the chassis monitors the temperature in real time and transmits the signal to the control panel to precisely regulate the power of the power supply and the start and stop of the cooling fan, so that the brazing material is always at an appropriate temperature, ensuring the bonding quality between the brazing material and the radiator substrate and improving the welding effect.

[0018] 3. For this fully automatic brazing machine for radiators, the mounting frame in the mounting part is connected to the multi-axis robotic arm of the brazing machine through the first bolt, which is convenient for disassembly and replacement. The U-shaped structure of the connecting frame, the first feeding hole and the first mounting hole opened, as well as the second bolt, are convenient for connecting with components such as the feeding part, facilitating the overall assembly, debugging, and maintenance of the equipment, and improving the convenience and flexibility of equipment use.

[0019] 4. The fully automatic brazing machine for radiators has an open top on the feeding tank and is equipped with a tank cover with heat dissipation holes, which can automatically discharge heat to prevent the temperature inside the tank from being too high and affecting the performance of the brazing filler metal. The connecting end of the tank cover and the bottom outer wall of the feeding tank is connected to the connecting frame through Bolt II, with stable installation. Moreover, the alignment design of Feeding Hole II with Feeding Hole I and Mounting Hole II with Mounting Hole I facilitates the transportation of the brazing filler metal and the installation of the spraying nozzle, ensuring the stability of the equipment operation.

[0020] 5. The fully automatic brazing machine for radiators adopts automation technology, such as the CF-DJ331 three-axis brazing solder paste machine and the automated temperature control system, etc., to realize the automated operation of the radiator welding process. It reduces manual intervention, not only improves the welding efficiency but also reduces the labor cost, meets the requirements of large-scale production, enhances the market competitiveness of the enterprise. The stable temperature of the brazing filler metal and good welding quality effectively reduce the generation of waste products caused by poor welding, reduce the waste of raw materials and production costs, improve the production efficiency, enable the enterprise to utilize resources more efficiently during the production process, and increase the economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 FIG. is a schematic diagram of the overall structure of a fully automatic brazing machine for radiators proposed by the present invention; Figure 2 FIG. is a connection diagram of the installation part, feeding part and temperature control part of a fully automatic brazing machine for radiators proposed by the present invention; Figure 3 FIG. is a schematic diagram of the structure of the installation part of a fully automatic brazing machine for radiators proposed by the present invention; Figure 4 FIG. is a schematic diagram of the structure of the feeding part of a fully automatic brazing machine for radiators proposed by the present invention; Figure 5 FIG. is a schematic diagram of the internal structure of the feeding tank of a fully automatic brazing machine for radiators proposed by the present invention; Figure 6 FIG. is a connection diagram of the spraying nozzle and the heat compensation part of a fully automatic brazing machine for radiators proposed by the present invention; Figure 7 FIG. is a connection diagram of the feeding part and the heat compensation part of a fully automatic brazing machine for radiators proposed by the present invention; Figure 8 FIG. is a connection diagram of the feeding pipe and the spraying nozzle of a fully automatic brazing machine for radiators proposed by the present invention; Figure 9 FIG. is a fully automatic brazing machine for radiators proposed by the present invention Figure 8 Enlarged view of A in

[0022] In the figure: 1. Brazing machine; 2. Installation part; 21. Installation frame; 22. Bolt 1; 23. Connecting frame; 24. Feeding hole 1; 25. Installation hole 1; 26. Bolt 2; 3. Feeding part; 31. Feeding tank; 32. Tank cover; 33. Heat dissipation hole; 34. Connecting end; 35. Threaded hole; 36. Feeding hole 2; 4. Temperature control part; 41. Insulating sleeve; 42. Induction coil; 43. Chassis; 44. Control panel; 45. Heat dissipation fan; 5. Feeding pipe; 6. Spray nozzle; 7. Thermal compensation part; 71. Piston; 72. Through hole; 73. Spring; 74. Pipe sleeve; 75. Compensation pipe; 76. Heat preservation sleeve; 77. Air inlet hole. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-9 , the present invention provides a technical solution: a fully automatic brazing machine for radiators, including a brazing machine 1, using a CF-DJ331 three-axis brazing solder paste machine for automatic welding of tin-based brazing materials and radiators. In this case, the installation part 2 is installed on the brazing machine 1 and is used to install brazing tools and temperature control tools. In this case, the feeding part 3 is installed on the installation part 2 and is used to reheat the transported brazing material. In this case, the temperature control part 4 is installed on the feeding part 3 and is used to adjust the temperature of the brazing material. In this case, the feeding pipe 5 is used to transport the brazing material. In this case, the spray nozzle 6 is used to spray the brazing material. In this case, the thermal compensation part 7 is installed on the spray nozzle 6 to compensate for the heat loss of the brazing material in the spray nozzle 6 by using the heating temperature.

[0025] In the present invention, in order to facilitate the loading and unloading of the unique brazing tools and temperature control tools in this case, the installation part 2 includes an installation frame 21. A bolt 1 22 is provided on the installation frame 21. The installation frame 21 is threadedly connected to the multi-axis robotic arm of the brazing machine 1 through the bolt 1 22. A connecting frame 23 is fixedly connected to the bottom of the installation frame 21. The connecting frame 23 is a U-shaped structure. Feeding holes 1 24 and installation holes 1 25 are respectively opened on the two ear ends of the connecting frame 23. Bolts 2 26 are respectively provided on the two ear ends of the connecting frame 23.

[0026] In this embodiment, in order to further keep the transported solder insulated, the loading section 3 of this case includes a loading tank 31. The top of the loading tank 31 is open, and a tank cover 32 is installed at the top opening of the loading tank 31. Heat dissipation holes 33 are provided on the tank cover 32, and the heat dissipation holes 33 are used to automatically discharge the heat in the loading tank 31. Connecting ends 34 are fixedly connected to the top of the tank cover 32 and the bottom of the outer wall of the loading tank 31 respectively. Threaded holes 35 corresponding to the second bolts 26 are provided on both of the two connecting ends 34. The connecting frame 23 is threadedly connected to the threaded holes 35 of the two connecting ends 34 respectively through the second bolts 26. Feeding holes two 36 are provided at the centers of the tank cover 32 and the connecting ends 34 connected thereto. The two feeding holes two 36 are aligned with the feeding hole one 24. Mounting holes two are provided at the centers of the bottom of the loading tank 31 and the connecting ends 34 connected thereto. The two mounting holes two are aligned with the mounting hole one 25.

[0027] In order to overcome the heat loss of the melted solder after transportation and perform secondary heating, the temperature control section 4 of this case includes an insulating sleeve 41. The insulating sleeve 41 is fixedly sleeved on the outer wall of the loading tank 31. An induction coil 42 is installed on the inner wall of the tank opening of the loading tank 31. The insulating sleeve 41 prevents potential leakage of the induction coil 42. A chassis 43 is installed between the outer wall of the insulating sleeve 41 and the inner wall of the connecting frame 23. A control panel 44 is installed on the outer wall of the chassis 43. Heat dissipation fan holes are provided on both sides of the outer wall of the insulating sleeve 41. Heat dissipation fans 45 are installed in the two heat dissipation fan holes. The heat dissipation fans 45 are used to perform air-cooling heat dissipation on the high-temperature loading tank 31.

[0028] It should be noted that in order to further automate the control of the solder temperature, a temperature sensor and a power supply are installed in the chassis 43 of this case. The temperature sensor uses a K-type thermocouple, with a temperature range generally from -270°C to 1800°C. It has advantages such as good linearity, high sensitivity, and relatively low price, and can well meet the temperature detection requirements of tin-based solder. Both ends of the induction coil 42 are fixedly penetrated through the feeding tank 31 and the insulating sleeve 41 and are electrically connected to the power supply. The power supply uses a KZG series - 1 induction heating power supply, equipped with a function of programmed temperature rise and temperature control, and can set the temperature rise or fall curve according to process requirements. The temperature sensor is electrically connected to two cooling fans 45. The temperature sensor can control the start and stop of the cooling fans 45 in real time according to the temperature value of the feeding tank 31. The cooling power supply, the temperature sensor, and the two cooling fans 45 are all electrically connected to the control panel 44. The feeding pipe 5 is an L-shaped elbow. One end of the feeding pipe 5 extends between the mounting frame 21 and the connecting frame 23. The other end of the feeding pipe 5 is installed on the inner walls of the feeding hole one 24 and the feeding hole two 36 and extends into the interior of the feeding tank 31. The top end of the spraying nozzle 6 is communicated with the extended end of the feeding pipe 5. The bottom end of the spraying nozzle 6 movably penetrates through the mounting hole two and the mounting hole one 25 and extends downward to the outside of the connecting frame 23. It is connected to the tin-based solder conveying pipeline through the feeding pipe 5, and the tin-based solder is conveyed through the interior of the feeding tank 31 and discharged from the spraying nozzle 6.

[0029] It should be explained that in order to further elastically control the pressure and heat dissipation efficiency in the feeding tank 31, the thermal compensation part 7 of this case includes a piston 71. The piston 71 fits on the inner wall of the feeding tank 31 and is located below the induction coil 42. The middle part of the piston 71 is slidably sleeved on the outer wall of the spraying nozzle 6 and is provided with through holes 72 around it. A spring 73 is elastically connected between the bottom of the piston 71 and the bottom of the inner wall of the feeding tank 31. The high temperature and high pressure generated by the induction coil 42 inside the feeding tank 31 will squeeze the piston 71 to descend. Relying on the elastic force of the spring 73 to form a reaction force, the piston 71 squeezes the air inside the tank upward. Combining with the cooling effect of the cooling fans 45, the temperature of the feeding tank 31 changes within a certain range, thereby prompting the piston 71 to repeatedly squeeze the air and accelerating the discharge of air from the heat dissipation holes 33.

[0030] In order to further perform heat preservation compensation for the heat loss of the flowing filler metal in the nozzle 6, a pipe sleeve 74 is connected around the outer wall of the extending end of the nozzle 6 in this case. A compensation pipe 75 is installed on the inner wall of each pipe sleeve 74. The top end of each compensation pipe 75 extends into the charging tank 31 and is sealed. The top end of each compensation pipe 75 is respectively slidably connected to the inner wall of the corresponding through hole 72 and is lower than the upper orifice of the through hole 72. Each compensation pipe 75 movably passes through the first mounting hole 25 and the second mounting hole and fits against the nozzle 6. A heat preservation sleeve 76 is fixedly sleeved on the outer wall of the compensation pipe 75. The heat preservation sleeve 76 reduces the heat loss efficiency of the compensation pipe 75 and the nozzle 6. An air inlet hole 77 is opened on the outer wall of the top end of each compensation pipe 75. When the piston 71 is pressed down by high-pressure air, the air inlet hole 77 is exposed from the through hole 72, thereby sucking the hot air in the charging tank 31 and transferring heat to the nozzle 6 for heat preservation.

[0031] Working principle: One end of the feed pipe 5 is connected to an external tin-based filler metal conveying pipeline. The tin-based filler metal enters the charging tank 31 through the feed pipe 5. When the power supply is started, the induction coil 42 generates an alternating magnetic field, causing the filler metal in the charging tank 31 to generate an induced current, and then generating heat to achieve secondary heating of the filler metal and make up for the heat loss during the conveying process of the filler metal.

[0032] The K-type thermocouple in the chassis 43 monitors the temperature of the filler metal in the charging tank 31 in real time and transmits the temperature signal to the control panel 44. If the temperature is too high, the control panel 44 controls the cooling fan 45 to start to perform air cooling and heat dissipation on the high-temperature charging tank 31. If the temperature is too low, the control panel 44 controls the power supply to increase the power, so that the induction coil 42 generates more heat to ensure that the temperature of the filler metal always remains within a suitable range.

[0033] Due to the high temperature and high pressure generated by the heating of the induction coil 42 inside the charging tank 31, the piston 71 is extruded to descend. The spring 73 generates a reaction force to push the piston 71 to squeeze the air inside the tank upward. Cooperating with the cooling effect of the cooling fan 45, the temperature of the charging tank 31 changes within a certain range, prompting the piston 71 to repeatedly squeeze the air, accelerating the discharge of the air from the heat dissipation holes 33, and realizing the elastic control of the pressure and heat dissipation efficiency inside the charging tank 31.

[0034] When the piston 71 is pressed down by high-pressure air, the air inlet hole 77 is exposed from the through hole 72, sucking the hot air in the charging tank 31. The hot air flows in the compensation pipe 75 and transfers heat to the nozzle 6 through the pipe wall to compensate for the heat loss of the flowing filler metal in the nozzle 6, ensuring that the filler metal maintains a suitable temperature when ejected and improving the bonding quality with the radiator substrate.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A fully automatic brazing machine for radiators, characterized in that: include: Brazing machine (1); A mounting portion (2) mounted on the brazing machine (1) and used for mounting a brazing tool and a temperature control tool; A feeding portion (3) mounted on the mounting portion (2) and used for secondary heating of the conveyed solder; A temperature control unit (4) is installed on the feeding unit (3) and is used to adjust the temperature of the solder; A feed pipe (5) for conveying solder; A spray nozzle (6) for spraying solder; A heat compensation part (7) is mounted on the spray nozzle (6) and uses the heating temperature to compensate for the heat loss of the solder in the spray nozzle (6).

2. The fully automatic radiator brazing machine according to claim 1, characterized in that: The mounting portion (2) comprises a mounting frame (21), the mounting frame (21) being provided with a bolt 1 (22), the mounting frame (21) being threadedly connected to a multi-axis mechanical arm of a brazing machine (1) via the bolt 1 (22), the bottom of the mounting frame (21) being fixedly connected with a connecting frame (23), the connecting frame (23) being a U-shaped structure, the two ear ends of the connecting frame (23) being respectively provided with a feed hole 1 (24) and a mounting hole 1 (25), and the two ear ends of the connecting frame (23) being respectively provided with a bolt 2 (26).

3. The fully automatic radiator brazing machine according to claim 2, characterized in that: The feeding portion (3) comprises a feeding tank (31), the top of the feeding tank (31) is provided with an opening, a tank cover (32) is installed at the top opening of the feeding tank (31), a heat dissipation hole (33) is provided on the tank cover (32), the top of the tank cover (32) and the bottom of the outer wall of the feeding tank (31) are fixedly connected with connecting ends (34), the two connecting ends (34) are provided with threaded holes (35) corresponding to the second bolt (26), and the connecting frame (23) is threadedly connected to the threaded holes (35) of the two connecting ends (34) respectively through the second bolt (26).

4. The fully automatic radiator brazing machine according to claim 3, characterized in that: A second feeding hole (36) is provided at the center of the tank cover (32) and the center of the connecting end (34) connected thereto, and the two second feeding holes (36) are aligned with the first feeding hole (24). A second mounting hole is provided at the center of the bottom of the loading tank (31) and the center of the connecting end (34) connected thereto, and the two second mounting holes are aligned with the first mounting hole (25).

5. The fully automatic radiator brazing machine according to claim 4, characterized in that: The temperature control part (4) comprises an insulating sleeve (41), the insulating sleeve (41) is fixedly mounted on the outer wall of the loading tank (31), an induction coil (42) is installed on the inner wall of the tank mouth of the loading tank (31), a machine box (43) is installed between the outer wall of the insulating sleeve (41) and the inner wall of the connecting frame (23), a control panel (44) is installed on the outer wall of the machine box (43), and fan holes are opened on both sides of the outer wall of the insulating sleeve (41), and cooling fans (45) are installed in the two fan holes.

6. The fully automatic radiator brazing machine according to claim 5, characterized in that: A temperature sensor and a power supply are installed in the chassis (43); both ends of the induction coil (42) are fixedly passed through the loading tank (31) and the insulating sleeve (41) and are electrically connected to the power supply; the temperature sensor is electrically connected to two cooling fans (45); and the power supply, the temperature sensor and the two cooling fans (45) are electrically connected to the control panel (44).

7. The fully automatic radiator brazing machine according to claim 6, characterized in that: The feed pipe (5) is an L-shaped curved pipe, one end of the feed pipe (5) extends between the mounting frame (21) and the connecting frame (23), and the other end of the feed pipe (5) is mounted on the inner walls of the first feed hole (24) and the second feed hole (36) and extends to the interior of the feeding tank (31).

8. The fully automatic radiator brazing machine according to claim 7, characterized in that: The top end of the spray nozzle (6) is connected to the extended end of the feed pipe (5), and the bottom end of the spray nozzle (6) movably passes through the second mounting hole and the first mounting hole (25) and extends downward to the outside of the connecting frame (23).

9. The fully automatic radiator brazing machine according to claim 8, characterized in that: The heat compensation part (7) includes a piston (71), which is attached to the inner wall of the feeding tank (31) and is located below the induction coil (42). The middle part of the piston (71) is slidably sleeved on the outer wall of the spray nozzle (6) and is surrounded by a through hole (72). A spring (73) is elastically connected between the bottom of the piston (71) and the bottom of the inner wall of the feeding tank (31).

10. The fully automatic radiator brazing machine according to claim 9, characterized in that: The outer wall of the extended end of the spray nozzle (6) is surrounded by a pipe sleeve (74), and the inner wall of each pipe sleeve (74) is installed with a compensation tube (75). The top end of each compensation tube (75) extends to the inside of the feeding tank (31) and is sealed. The top end of each compensation tube (75) is slidably connected to the inner wall of the corresponding through hole (72) and the height is lower than the upper hole of the through hole (72). Each compensation tube (75) is movable through the mounting hole 1 (25) and the mounting hole 2 and fits the spray nozzle (6). The outer wall of the compensation tube (75) is fixedly sleeved with an insulation sleeve (76), and the outer wall of the top end of each compensation tube (75) is provided with an air inlet hole (77).

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