Brazing die device for die-casting aluminum alloy component of new energy automobile

Abstract

The invention relates to the field of brazing dies, and discloses a new energy automobile die-casting aluminum alloy component brazing die device which comprises a base provided with a containing groove, a plurality of limiting openings communicating with the containing groove are formed in the side face of the base, and elastic limiting pieces are arranged on the two sides of each limiting opening. The elastic limiting piece comprises an air bag and a connecting pipe connected with the air bag, an air outlet hole is formed in the side face of the connecting pipe, a piston assembly is arranged in the connecting pipe, and a through hole penetrating through the front end and the rear end of the piston assembly is formed in the piston assembly; the air bag is arranged to be matched with the piston assembly, so that automatic control and uniform distribution of the hot air are achieved, the pipeline is limited in the drying process or after drying is finished, brazing operation is conducted closely, and the drying efficiency is improved. Water adsorbed on the surface and inside is effectively removed, and the operation efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of brazing molds, and more particularly to a brazing mold device for die-cast aluminum alloy components for new energy vehicles. Background Technology

[0002] In the development of new energy vehicles, heat exchangers, as key components in battery systems, motor systems, and air conditioning systems, widely adopt die-cast aluminum alloy components.

[0003] In heat exchangers, the piping used to transport media such as coolant, refrigerant, or air is a critical component. Due to the low melting point, easy oxidation, and high welding difficulty of aluminum alloys, traditional fusion welding processes are insufficient to meet their connection requirements. Therefore, brazing has become the most commonly used connection method. Through reasonable brazing process design and equipment configuration, a strong connection between metals can be achieved at a lower temperature, while avoiding deformation or performance degradation caused by overheating of the base material. This effectively improves the thermal efficiency, sealing performance, durability, and safety of the heat exchanger. Because aluminum alloys easily absorb moisture from the air, especially in humid environments, this moisture decomposes at high temperatures to produce hydrogen gas, leading to porosity defects and affecting joint strength and sealing. Therefore, the outer surface of the pipe needs to be dried before brazing to remove the absorbed moisture. Traditional methods often use hot air drying or vacuum drying, meaning that a special drying step needs to be designed before brazing. Secondly, due to the structure of the pipe itself, aluminum alloy pipes are usually cylindrical or elliptical in cross-section, with smooth surfaces and no obvious reference surfaces. In traditional clamps or positioning devices, it is difficult to achieve uniform and stable clamping, which can easily lead to uneven local heating. Therefore, it is necessary to design a brazing mold that can adapt to pipes of different shapes while simultaneously drying and heating, reducing brazing process steps and improving brazing accuracy and work efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a brazing mold device for die-cast aluminum alloy components for new energy vehicles to solve the problems of low brazing efficiency and low brazing precision caused by the fact that aluminum alloys easily absorb moisture in the air, requiring a specially designed drying step before brazing, and the difficulty in fixing or uniformly drying due to the limitations of the pipe structure itself. The specific technical solution is as follows: A brazing mold device for die-cast aluminum alloy components of new energy vehicles, applied to automotive heat exchangers, includes a base with a molded placement groove. The base has several limiting ports on its side that connect to the placement groove. Each limiting port has elastic limiting components on both sides. Each elastic limiting component includes an airbag and a connecting pipe connected to it. The connecting pipe is detachably connected to the base. The connecting pipe has an air outlet on its side and a piston assembly inside. The piston assembly has through holes extending through its front and rear ends. The airbag is connected to a heat source and uses the received heat pressure to drive the piston assembly to move, thereby controlling the opening or closing of the air outlet. The amount of heat received by the airbag per unit time is greater than the amount of heat output by the air outlet per unit time.

[0005] As an improvement to the above technical solution, the outlet of the air vent is oriented toward or close to the limiting port.

[0006] As an improvement to the above technical solution, the end of the connecting pipe is provided with a gas supply pipe that gradually tapers towards its center, the gas outlet is provided on the gas supply pipe, and the gas supply pipe is threadedly connected to the base.

[0007] As an improvement to the above technical solution, the piston assembly includes a movable part and a spring. The movable part is T-shaped, and part of the movable part is disposed inside the gas supply pipe. The spring is disposed between the end of the movable part and the inner wall of the gas supply pipe.

[0008] As an improvement to the above technical solution, a silicone sealing ring is provided on the outside of the gas supply pipe, and the silicone sealing ring is located at the connection between the gas supply pipe and the base.

[0009] As an improvement to the above technical solution, the airbag is provided with restraints at both ends, which limit the airbag from expanding to the side.

[0010] As an improvement to the above technical solution, the airbag is provided with an external pipe, and the airbag is connected to the heat source through the external pipe.

[0011] As one of the improvements to the above technical solution, the gas output by the heat source is nitrogen or argon.

[0012] As an improvement to the above technical solution, the base is provided with a plug-in part and a receiving groove on its two opposite end faces, and different bases can be detachably spliced ​​together through the plug-in part and the receiving groove.

[0013] As an improvement to the above technical solution, the bottom of the restraint member is provided with a protrusion, and the base is provided with a insertion groove for receiving the protrusion.

[0014] The beneficial effects of this application are as follows: By setting up the cooperation between the airbag and piston assembly, the automatic control and uniform distribution of hot air are realized. The pipeline is limited during or after the drying process, and the brazing operation is carried out immediately. This not only effectively removes the moisture adsorbed on the surface and inside, but also significantly improves the work efficiency. The reliable workpiece positioning and stable drying process provide a good foundation for subsequent brazing, thereby improving the welding quality and consistency. The detachable design of the connecting pipe and the base makes the device easy to clean and replace during use, extending its service life and reducing maintenance costs. The air outlet is designed to face or be close to the limiting port. This structural layout allows the hot air to act more directly and concentratedly on the limiting port area, thereby achieving precise heating and drying. Nitrogen or argon is used as the drying medium. Both of these gases are inert gases, which are chemically stable and do not easily react with other substances. This can effectively prevent the workpiece from oxidizing or undergoing other adverse reactions in a high-temperature environment. In addition, nitrogen and argon have good thermal conductivity and drying capacity, which can quickly remove the moisture adsorbed on the surface and inside of the aluminum alloy, thereby improving drying efficiency and quality.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Of course, implementing any product or method of this application does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0018] Figure 2 This is a schematic diagram of the structure of the elastic limiting member of the present invention.

[0019] Figure 3 This is a schematic diagram of the connecting tube of the present invention.

[0020] In the diagram: 1. Base; 2. Elastic limiting component; 3. Protrusion; 4. Insertion groove; 11. Placement groove; 12. Limiting port; 21. Airbag; 22. Connecting tube; 23. Restraining component; 221. Moving component; 222. Spring; 223. Air vent; 224. Silicone sealing ring; 2211. Through hole. Detailed Implementation

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

[0022] Heat exchangers in new energy vehicles are typically complex structures composed of multiple pipes. These pipes play a core role in the overall design by transferring heat and guiding fluid flow. Their material is usually aluminum alloy. Since aluminum alloy easily absorbs moisture in the air, a special drying step needs to be designed before brazing. Furthermore, the pipe structure itself makes it difficult to fix or dry evenly, resulting in low brazing efficiency and low brazing precision. To address these issues, the present invention provides several embodiments. Please refer to [link / reference]. Figures 1-3 In this embodiment of the invention, a brazing mold device for die-cast aluminum alloy components of new energy vehicles is provided to improve drying efficiency and precision, thereby improving the overall brazing quality. It includes a base 1 with a placement groove 11 formed thereon. The side of the base 1 is provided with a plurality of limiting ports 12 that communicate with the placement groove 11. Each limiting port 12 is provided with elastic limiting members 2 on both sides. The elastic limiting member 2 includes an airbag 21 and a connecting pipe 22 connected thereto. The connecting pipe 22 is detachably connected to the base 1. This structure is convenient for maintenance and replacement. To achieve drying, the connecting pipe 22 is provided with an air outlet 223 on its side. The connecting pipe 22 is provided with a piston assembly inside. The piston assembly is provided with a through hole 2211 that runs through its front and rear ends to ensure smooth flow of hot air. The airbag 21 is connected to an external hot air source to ensure a stable supply and control of hot air. The received hot air pressure drives the piston assembly to move, thereby controlling the opening or closing of the air outlet 223. The amount of hot air received by the airbag 21 per unit time is greater than the amount of hot air output by the air outlet 223 per unit time.

[0023] Understandably, when the amount of hot air received by the airbag 21 per unit time is greater than the amount of hot air output by the air outlet 223 per unit time, some of the hot air will be stored inside the connecting pipe 22. As time goes by, the amount of hot air inside the connecting pipe 22 gradually increases, which will increase the internal air pressure. During this process, the hot air will push the piston assembly to move. Due to the overflow of hot air, the hot air will be output through the air outlet 223 to the pipe of the heat exchanger (placed in the limiting port 12) to dry the pipe. As the piston assembly moves, it gradually blocks the air outlet 223. Once the air outlet 223 is completely blocked, the hot air from the connecting pipe 22 cannot escape, which signifies that the drying process is complete. As the hot air source continues to output hot air, the air bladder 21 will expand. Specifically, the air bladders 21 on both sides of the pipe will expand simultaneously and compress the pipe. That is, after the air bladders 21 on both sides of the pipe expand, they will limit the pipe. At this point, brazing can be performed.

[0024] By coordinating the airbag 21 with the piston assembly, automatic control and uniform distribution of hot air are achieved. The pipe is limited during or after the drying process, and brazing is then performed immediately. This effectively removes surface and internal adsorbed moisture, significantly improving work efficiency. Reliable workpiece positioning and a stable drying process provide a good foundation for subsequent brazing, thereby improving welding quality and consistency. The detachable design of the connecting pipe 22 and the base 1 makes the device easy to clean and replace during use, extending its service life and reducing maintenance costs. Precise control of hot air flow and pressure reduces unnecessary energy consumption.

[0025] In traditional drying processes, the positions of the air outlets 223 are often fixed or not specifically designed for the workpiece structure, making it difficult for hot air to accurately reach the critical areas requiring drying. This can lead to problems such as hot air diffusing in non-critical areas, resulting in energy waste, and a lack of effective control over the direction of hot air flow, making it difficult to achieve stable and uniform drying results. Therefore, this invention provides some embodiments in which the outlets 223 are oriented towards or close to the limiting port 12, and the positions of the air outlets 223 are designed to face or be close to the limiting port 12. This structural layout allows hot air to act more directly and concentratedly on the limiting port 12 area, thereby achieving precise heating and drying. This design not only helps improve the penetration efficiency of hot air to the surface and interior of the workpiece, but also effectively avoids excessive diffusion or waste of hot air, improving the controllability and uniformity of the overall drying process.

[0026] To further improve the stability of hot gas delivery and the detachability of the device, in some embodiments, the end of the connecting pipe 22 is provided with a gradually narrowing gas delivery pipe connected to it. Gas outlets 223 are located on the gas delivery pipe, which is threadedly connected to the base 1. Specifically, the end of the connecting pipe 22 is designed as a tapered or tapered structure, making the fluid channel gradually narrower, thereby enhancing the concentration and pressure of the hot gas. This tapering structure is followed by an independent gas delivery pipe with multiple gas outlets 223 for uniformly delivering hot gas to the inside of the workpiece. Simultaneously, the gas delivery pipe is threadedly connected to the base 1 for easy installation, disassembly, and maintenance.

[0027] This effectively solves the problems of inconvenient assembly and disassembly, poor sealing, and uneven heat distribution in traditional structures. This improvement not only enhances the efficiency and precision of the drying process but also strengthens the practicality and maintainability of the device, providing a more reliable guarantee for high-quality brazing of aluminum alloy components for new energy vehicles.

[0028] In some embodiments, the piston assembly includes a movable member 221 and a spring 222. The movable member 221 is T-shaped, with a portion of it disposed inside the gas supply pipe. The spring 222 is disposed between the end of the movable member 221 and the inner wall of the gas supply pipe. Specifically, the movable member 221 in this piston assembly has a T-shaped structure (more specifically, the movable member 221 appears T-shaped from the side, but it is actually composed of a circular plate and a hollow pipe vertically connected to the center of the circular plate). One end extends into the gas supply pipe, and the other end extends into the connecting pipe 22, for contact with hot gas and driven by its pressure. The spring 222 is located between the end of the movable member 221 and the inner wall of the gas supply pipe, serving as a buffer and resetting mechanism. When the air bladder 21 inflates due to the input of hot gas, it pushes the movable member 221 to move into the gas supply pipe, compressing the spring 222. When the pressure of the air bladder 21 decreases, the spring 222 rebounds, causing the movable member 221 to reset, thereby achieving automatic control of the air outlet 223.

[0029] This structural design not only enhances the stability and reliability of the piston assembly, but also improves the system's response speed and control accuracy to changes in air pressure.

[0030] To prevent hot gas leakage at the connection, in some embodiments, a silicone sealing ring 224 is provided on the outside of the gas supply pipe. The silicone sealing ring 224 is located at the connection between the gas supply pipe and the base 1. The sealing ring has good elasticity and high temperature resistance, and can effectively fill the tiny gap between the two to achieve a tight fit, thereby preventing the occurrence of hot gas leakage.

[0031] Regarding the control of the airbag 21, as the core component of the hot gas delivery system, the airbag 21 is usually made of elastic material and can expand after hot gas is input. To prevent the airbag 21 from undergoing disordered deformation or excessive stretching during expansion, which would affect its stable driving effect on the piston assembly, restraint components 23 (such as metal rings, fixing clamps, etc.) are respectively set at both ends of the airbag 21. These restraint components 23 can effectively limit the axial expansion of the airbag 21, forcing the airbag 21 to expand mainly in the lateral direction, thereby ensuring that it maintains stable contact and force with the piston assembly in the connecting pipe 22. This design not only improves the driving efficiency of the airbag 21, but also enhances the controllability and safety of the system. Preferably, the airbag 21 is provided with an external pipe 5, through which the airbag 21 is connected to the hot gas source.

[0032] Preferably, to enhance the connection stability between the restraint member 23 and the base 1, a protrusion 3 (such as a cylindrical or rectangular protrusion) is designed at the bottom of the restraint member 23, while a corresponding insertion slot 4 (such as a groove or through hole 2211) is provided on the base 1. When the restraint member 23 is installed on the base 1, the protrusion 3 can be smoothly inserted into the insertion slot 4 to achieve a stable mechanical connection. This structure not only enhances the positioning accuracy of the restraint member 23, but also improves the stability and reliability of the overall structure.

[0033] In this invention, nitrogen or argon is used as the drying medium. Both of these gases are inert gases, which have the characteristics of chemical stability and are not easy to react with other substances. They can effectively prevent the workpiece from oxidizing or other adverse reactions in a high-temperature environment. In addition, nitrogen and argon have good thermal conductivity and drying capacity, which can quickly remove the moisture adsorbed on the surface and inside of the aluminum alloy, thereby improving drying efficiency and quality.

[0034] To further enhance the versatility and flexibility of the device, in the aforementioned brazing mold device for die-cast aluminum alloy components for new energy vehicles, each base 1 has an insertion part and a receiving groove on its two opposite end faces. Different bases 1 can be detachably spliced ​​through the insertion part and the receiving groove. Specifically, each base 1 has an insertion part (such as a protruding structure or positioning post) at one end and a receiving groove (such as a groove or positioning hole) at the other end. When it is necessary to expand or adjust the device structure, simply insert the insertion part of one base 1 into the receiving groove of the adjacent base 1 to complete the quick splicing. This structure not only supports multi-segment connections but also has good alignment accuracy and stability, ensuring that the overall structure will not loosen or misalign during use.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A brazing mold device for die-cast aluminum alloy components in new energy vehicles, applied to automotive heat exchangers, characterized in that... The device includes a base with a molded placement groove. Several limiting ports communicating with the placement groove are provided on the side of the base. Each limiting port has elastic limiting members on both sides. Each elastic limiting member includes an airbag and a connecting tube connected to it. The connecting tube is detachably connected to the base. An air outlet is provided on the side of the connecting tube. A piston assembly is provided inside the connecting tube. The piston assembly has through holes extending through its front and rear ends. The airbag is connected to a heat source and uses the received heat pressure to drive the piston assembly to move, thereby controlling the opening or closing of the air outlet. The amount of heat received by the airbag per unit time is greater than the amount of heat output by the air outlet per unit time.

2. The brazing mold device for die-cast aluminum alloy components for new energy vehicles according to claim 1, characterized in that: The outlet of the air vent is oriented toward or close to the limiting port.

3. The brazing mold device for die-cast aluminum alloy components for new energy vehicles according to claim 1, characterized in that: The end of the connecting pipe is provided with a gas supply pipe that gradually tapers towards its center, and the gas outlet is provided on the gas supply pipe. The gas supply pipe is threadedly connected to the base.

4. The brazing mold device for die-cast aluminum alloy components for new energy vehicles according to claim 3, characterized in that: The piston assembly includes a movable member and a spring. The movable member is T-shaped, and a portion of the movable member is disposed inside the gas supply pipe. The spring is disposed between the end of the movable member and the inner wall of the gas supply pipe.

5. The brazing mold device for die-cast aluminum alloy components for new energy vehicles according to claim 3, characterized in that: A silicone sealing ring is provided on the outside of the gas supply pipe, and the silicone sealing ring is located at the connection between the gas supply pipe and the base.

6. The brazing mold device for die-cast aluminum alloy components for new energy vehicles according to claim 1, characterized in that: The airbag is provided with restraints at both ends, which limit the airbag from expanding to the side.

7. The brazing mold device for die-cast aluminum alloy components for new energy vehicles according to claim 1, characterized in that: The airbag is equipped with an external pipe, and the airbag is connected to the heat source through the external pipe.

8. The brazing mold device for die-cast aluminum alloy components of new energy vehicles according to claim 1, characterized in that: The gas output from the heat source is either nitrogen or argon.

9. The brazing mold device for die-cast aluminum alloy components for new energy vehicles according to claim 1, characterized in that: The base has a plug-in part and a receiving groove on its two opposite end faces, and different bases can be detachably spliced ​​together through the plug-in part and the receiving groove.

10. A brazing mold device for die-cast aluminum alloy components for new energy vehicles according to claim 6, characterized in that: The bottom of the restraint member is provided with a protrusion, and the base is provided with a insertion groove for receiving the protrusion.

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