Heat exchanger manufacturing method and device

Abstract

The invention discloses a heat exchanger manufacturing method and device. The method comprises the steps that the surface of a plate to be stamped is coated with a diaphragm; the plate with the surface coated with the diaphragm is stamped, and a stamping forming part is obtained; removing the diaphragm on the surface of the punch-formed part; and the surface diaphragm removed punch forming part is welded to form the heat exchanger. According to the method and device, the degreasing procedure is not needed after the plate is stamped, the heat exchanger welding technological process is shortened, the production energy consumption of the heat exchanger is reduced, the production cost is reduced, energy is saved, cost is reduced, operation is easy, and the percent of pass is high.

Description

Technical Field

[0001] The present invention relates to the technical field of radiators, and particularly to a manufacturing method and a manufacturing device for a heat exchanger used for battery cooling. Background Art

[0002] In a battery thermal management system, since a battery generates heat during operation, a water-cooled radiator is generally provided to cool the battery. A water-cooled radiator, also known as a water-cooled plate, is a component that exchanges heat through liquid cooling. The traditional production process of a water-cooled plate includes: oil spraying and stamping → degreasing → spray brazing → brazing. The process of stamping the sheet into a shape is carried out under the condition that the stamping tool is in contact with the sheet, and inevitably, a frictional force that prevents the metal from flowing will be generated, which will cause the processed sheet to be easily scratched, deformed unevenly, and cracks may occur in severe cases. Moreover, it is easy to cause wear of the stamping tool, and the punch die needs to be replaced regularly.

[0003] Therefore, in the traditional production process of a water-cooled plate, stamping oil needs to be added to the surface of the sheet before or during the stamping process. However, this will cause the surface of the stamped plate to have oil or grease. Therefore, after the sheet is stamped into a shape, it needs to be degreased at a high temperature first, and then it can be transferred to the next process. Only the degreased water-cooled plate can be evenly coated during the spray brazing process, ensuring the welding quality.

[0004] However, degreasing is a high-energy-consuming process, resulting in a relatively high energy consumption in the production process. Summary of the Invention

[0005] The purpose of the present invention is to provide a manufacturing method for a heat exchanger to solve the above technical problems.

[0006] Another purpose of the present invention is to provide a manufacturing device for a heat exchanger.

[0007] To achieve the above purposes, the present invention provides a manufacturing method for a heat exchanger, including the following steps:

[0008] Coat a diaphragm on the surface of the sheet to be stamped;

[0009] Stamp the sheet with the diaphragm coated on its surface to obtain a stamped part;

[0010] Remove the diaphragm on the surface of the stamped part;

[0011] Weld the stamped part after removing the diaphragm.

[0012] Further, provide another sheet, and weld the stamped part after removing the diaphragm with the other sheet; before welding, perform spray brazing and coating with brazing filler metal on the stamped part after removing the diaphragm; coat the diaphragm on one side of the sheet to be stamped, and the side coated with the diaphragm is the subsequent welding surface.

[0013] Further, the separator composition contains a lubricant.

[0014] Further, the separator is a PE film.

[0015] Further, the thickness of the separator is 40 μm - 50 μm, and / or the elongation of the separator is 500% - 600%, the thermal decomposition temperature of the separator is greater than 60°C, and / or the peel resistance viscosity of the separator is 30 g - 40 g / 25 mm.

[0016] Further, a laminating machine is used to coat the separator on the surface of the plate to be stamped. The laminating operation temperature of the laminating machine is 40°C - 55°C, and the laminating speed of the roller of the laminating machine is 4 m / min - 8 m / min.

[0017] Further, welding the stamped part after removing the separator includes: placing the stamped part and the other plate together on a welding fixture for fixing; the stamped part is an end plate, the other plate is a flow plate, and the end plate and the flow plate enter the welding furnace together with the welding fixture and are welded into shape in the welding furnace; preferably, the laminating operation temperature of the laminating machine is 45°C - 50°C, and the laminating speed of the roller of the laminating machine is 5 m / min - 7 m / min.

[0018] To achieve the above-mentioned another object, the present invention provides a heat exchanger manufacturing device, including:

[0019] A laminating mechanism configured to coat a separator on the surface of a plate to be stamped;

[0020] A stamping mechanism configured to stamp the plate with a separator coated on its surface to obtain a stamped part;

[0021] A de-membraning mechanism configured to remove the separator on the surface of the stamped part;

[0022] A welding mechanism configured to weld the stamped part after removing the separator.

[0023] Further, the heat exchanger manufacturing device further includes a brazing spraying mechanism configured to perform brazing spraying treatment on the stamped part after removing the separator; the laminating mechanism includes a feeding component and a rolling component; optionally, the laminating operation temperature of the laminating mechanism is 40°C - 55°C, and the laminating speed of the rolling component of the laminating machine is 4 m / min - 8 m / min.

[0024] Further, the diaphragm is a PE film, the thickness of the PE film is 40μm - 50μm, the ductility is 500% - 600%, and the anti-peeling viscosity is 30g - 40g / 25mm; the laminating operation temperature of the laminator is 45°C - 50°C, and the laminating speed of the roller of the laminator is 5m / min - 7m / min.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] For the heat exchanger manufacturing method provided by the above technical solution, after the sheet is coated with the diaphragm and then stamped, the diaphragm is used instead of the stamping lubricating oil, so the degreasing process can be omitted, and it can be directly welded after stamping, shortening the welding process flow of the heat exchanger. Compared with the traditional process that requires degreasing treatment after stamping, the production energy consumption of the heat exchanger is reduced, and the production cost is lowered;

[0027] The heat exchanger manufacturing device provided by the above technical solution includes a film laminating mechanism and a film removing mechanism. During the manufacturing process of the heat exchanger, it is used to coat the diaphragm on the surface of the sheet to be stamped and then stamp after coating the diaphragm. Compared with the traditional process that requires degreasing treatment, the production energy consumption of the heat exchanger is reduced, and the production cost is lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a flowchart of a heat exchanger manufacturing method provided by an embodiment of the present invention;

[0029] Figure 2 is a comparison diagram of the stamping forming effects of the stamped sheet without film laminating and the stamped sheet with film laminating;

[0030] Figure 3 is a schematic diagram of the roughness position of the test piece. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0032] In this article, terms such as "upper, lower, inner, outer" are established based on the positional relationship shown in the drawings. Depending on the different drawings, the corresponding positional relationship may also change accordingly. Therefore, it cannot be understood as an absolute limitation of the protection scope; moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0033] Please refer to Figure 1 , Figure 1 is a flowchart of a heat exchanger manufacturing method provided by an embodiment of the present invention.

[0034] As shown in the figure, in a specific embodiment, the method for manufacturing a heat exchanger provided by the present invention includes the following steps:

[0035] Step S01: Coating a diaphragm on the surface of the sheet to be stamped;

[0036] Step S02: Stamping the sheet with the diaphragm coated on its surface to obtain a stamped part;

[0037] Step S03: Removing the diaphragm on the surface of the stamped part;

[0038] Step S04: Welding the stamped part after removing the diaphragm.

[0039] In this method, a diaphragm is coated on the surface of the sheet before stamping, and the coated diaphragm is torn off after stamping. There is no need to perform a degreasing process, and then spray brazing and welding are carried out. In this way, compared with the traditional process that requires degreasing treatment, the production energy consumption of the heat exchanger is reduced, and the production cost is lowered.

[0040] Specifically, when coating the diaphragm on the surface of the sheet to be stamped, the surface of the sheet to be stamped should be surface-treated. The surface of the sheet to be stamped needs to be clean, dry, free of grease or other impurities, and keep smooth, so that when coating the diaphragm, the diaphragm can be seamlessly attached to the surface of the sheet to be stamped, achieving that the diaphragm can better adhere to the surface of the sheet to be stamped.

[0041] Specifically, the diaphragm composition contains lubricating substances. In some embodiments, the diaphragm composition contains lubricating substances. For example, soap base, liquid paraffin, and PE wax are mixed into the film during manufacturing, which can achieve the self-lubricating effect of the diaphragm. Before stamping the sheet (such as an aluminum sheet), the diaphragm is coated first. During the stamping process, the high lubricity of the diaphragm is used to replace the use of stamping oil; in other embodiments, the diaphragm can also have a lubricating substance as the surface layer, such as the surface layer being graphite, molybdenum disulfide, PE wax, etc., and the matrix being a film. This can show relatively high lubricity and is relatively soft in appearance at room temperature. The working penetration of the lubricating substance is 100 - 300 10 -1 mm, which can achieve that the lubricating substance can be kept in the diaphragm without generating large friction. Coating the diaphragm on the surface of the sheet to be stamped can achieve that the sheet to be stamped can achieve the stamping lubrication effect without stamping oil during stamping. The diaphragm can replace the stamping oil to protect the stamping tooling and the sheet, and thus the surface finish of the sheet after stamping is no different from that of the traditional stamping method.

[0042] More specifically, in one embodiment, the contact surface components of the diaphragm and the plate to be punched contain viscous substances and adhesives, so that the viscosity of the diaphragm is 30g-40g / 25mm, so that the diaphragm has anti-peeling properties, and can ensure that during the stamping process, the diaphragm will not be separated from the surface of the plate due to the impact force of the stamping die, thereby affecting the wrapping effect. In other embodiments, before step S01: coating the surface of the plate to be punched with a diaphragm, step S05 is also required: applying a sticky glue on the contact surface of the diaphragm and the plate to be punched, wherein the viscosity of the glue is 30g-40g / 25mm; further, ensuring that the glue is evenly coated on the surface of the plate to be punched without bubbles or defects, and applying pressure to coat the diaphragm after the glue is dried at room temperature and solidified, so that the two are stuck together, so that the diaphragm does not separate from the plate to be punched during the stamping operation, and is completely attached to the surface of the plate coated with the diaphragm. If the diaphragm can be removed, the diaphragm will not easily remain on the stamped part due to adhesion.

[0043] More specifically, a diaphragm, such as a PE film, is coated on the surface of the sheet to be punched. The thickness of the diaphragm is 40μm-50μm. If the thickness of the diaphragm is less than 40μm, the diaphragm is too thin to extend to cover the entire sheet, which affects the diaphragm coating effect. During punching, the diaphragm is subjected to punching pressure or pulling deformation and ruptures, which leads to a decrease in the smoothness of the sheet at the rupture of the diaphragm. If the thickness of the diaphragm is greater than 50μm, the diaphragm is too thick, which makes the coating operation difficult. The force required to extend the diaphragm is greater, the temperature is higher, and more energy is consumed. Further, the ductility of the diaphragm is 500%-600%, which shows that the diaphragm has sufficient anti-cracking and wear resistance, and can achieve complete coating of the sheet to be punched without rupture or wrinkling of the diaphragm. Further, the thermal decomposition temperature of the diaphragm is greater than 60℃ (140℉). When tested in the 0-60℃ link, the diaphragm can resist the thermal decomposition reaction in this temperature range, showing good temperature resistance. Generally, during the stamping process, the temperature of the workpiece rises rapidly. Therefore, the thermal decomposition temperature of the diaphragm is greater than 60°C (140°F), which can be achieved within 0-60°C. The diaphragm can be effectively extended and will not melt or thermally decompose to cause rupture. It can also be achieved that the diaphragm will not be damaged due to excessive deformation during the stamping process. Furthermore, while the diaphragm plays a lubricating role, the surface finish of the plate after stamping is basically the same as that of the traditional stamping process.

[0044] Specifically, a laminating machine is used to coat the diaphragm on the surface of the plate to be punched. The operating temperature of the laminating machine during laminating is 40℃-55℃, and its roller is coated at a coating speed of 4m / min-8m / min. If the coating speed of the roller is less than the minimum speed in this range, bubbles, dust, etc. will enter between the diaphragm and the plate during laminating, and the diaphragm and the plate cannot be seamlessly fitted, which will affect the viscosity of the diaphragm and ultimately affect the protective effect of the diaphragm on the plate during punching; if the coating speed of the laminating machine roller is greater than 8m / min, the diaphragm will be subjected to excessive tension, resulting in the diaphragm being broken or over-stretched, resulting in the over-stretched portion of the diaphragm wrapping too little thickness on the plate, and the portion of the diaphragm with too little wrapping thickness will be punched and broken during punching, ultimately affecting the surface roughness of the punched surface of the punched part.

[0045] As a further preference, the operating temperature of the laminating machine for laminating is 45°C-50°C, and its roller performs laminating at a laminating speed of 5m / min-7m / min, so that the diaphragm and the plate can be fitted seamlessly, ensuring that the viscosity of the diaphragm is not affected by dust or other substances, achieving good adhesion and thereby playing the role of stamping protection and lubricating the plate.

[0046] Step S02: stamping the plate with the diaphragm coated on the surface to obtain a stamped part.

[0047] Specifically, the plate with the diaphragm coated on the surface is placed on a stamping tool and fixed, and the plate is stamped and formed by a stamping device to obtain the stamped part.

[0048] Step S03: removing the diaphragm on the surface of the stamped part.

[0049] Specifically, in one embodiment, the film removal operation is to peel off the film covering the surface of the stamped part, and after the film peeling operation, the film does not remain on the stamped part. In other embodiments, the film can be peeled off manually, sprayed with a desiccant so that the film loses its stickiness and falls off automatically, etc.

[0050] Step S04: welding the stamped parts.

[0051] Specifically, the stamped part is placed on a welding fixture and fixed, and then enters a welding furnace with the welding fixture, and is welded into shape in the welding furnace. In one embodiment, the heat exchanger is composed of two plates, one of which is a stamped part end plate, and the other is a bare plate that does not need to be stamped. The two plates are fixed together on a welding fixture, and then enter a welding furnace with the welding fixture to be welded into a water-cooled plate. In other embodiments, the heat exchanger is composed of multiple plates, not just one stamped part.

[0052] More specifically, in some embodiments, after step S03, step S06 is required: the stamped part with the diaphragm removed is subjected to a spray brazing process. Specifically, the stamped part can be placed on a spray brazing tool and fixed, and a spray head is used to spray braze along a linear trajectory. In other embodiments, a self-provided brazing agent or a brazing agent coating method can also be used.

[0053] The coating can increase the lubricity of the stamping process and reduce the wear and scratches between the tool and the plate. The effect of the coated and uncoated plates during the stamping process (without spraying stamping oil) is as follows: Figure 2 As shown in the figure, after stamping, the edges and bottom plates of the uncoated plates have obvious scratches. The quality of the stamped plates plays a key role in the impact on welding. The surface of the uncoated plates is too rough and the finish is poor after stamping, which will not only affect the subsequent welding effect of the plates, resulting in unqualified welding quality, false welding and fake welding, resulting in poor products, but also seriously affect the normal use of the stamping die. After stamping, due to the accumulation of aluminum chips, the more plates are stamped, the worse the stamping quality. In addition, the service life of the die will be greatly reduced, increasing costs.

[0054] In this embodiment, the diaphragm is coated only on one side of the plate to be punched, and the single side of the coated diaphragm is the subsequent welding surface. In this way, the amount of diaphragm used can be reduced, and half of the coating and removal operation steps can be omitted, thereby significantly reducing costs.

[0055] It is understood that in other embodiments, the two sides of the plate to be punched may be coated with a diaphragm. Compared with single-sided coating, the amount of diaphragm used and the coating and stripping cycle will increase, and the product cost will increase accordingly.

[0056] In addition to the above heat exchanger manufacturing method, the present invention also provides a heat exchanger manufacturing device, including:

[0057] The laminating mechanism is configured to cover the diaphragm on the surface of the plate to be punched.

[0058] The punching mechanism is configured to punch a plate whose surface is coated with a lubricating diaphragm to obtain a punched part.

[0059] The film removal mechanism is configured to remove the lubricating film on the surface of the stamped part.

[0060] The welding mechanism is configured to weld the stamped parts after the spray brazing process to form the heat exchanger.

[0061] Specifically, the heat exchanger manufacturing device also includes a brazing mechanism configured to perform a brazing treatment on the stamped parts from which the lubricating diaphragm has been removed.

[0062] Specifically, the film laminating mechanism includes a feeding component and a rolling component; optionally, the operating temperature for film laminating of the film laminating mechanism is 40°C - 55°C, and the film laminating speed of the rolling component of the film laminating machine is 4 m / min - 8 m / min. If the speed of the rolling component is less than 4 m / min, air bubbles will be generated between the diaphragm and the plate during film laminating, making it impossible to achieve seamless fitting between the diaphragm and the plate, affecting the viscosity of the diaphragm, and ultimately affecting the protective effect of the diaphragm on the plate during stamping; if the film laminating speed of the rolling component is greater than 8 m / min, the stretching force on the diaphragm is too large, resulting in problems such as rupture or excessive stretching of the diaphragm, and the thickness of the part of the diaphragm where excessive stretching occurs for wrapping the plate is too small. During stamping, the part of the diaphragm with too small a wrapping thickness is stamped and ruptured, ultimately affecting the surface roughness of the stamping surface of the stamping formed part.

[0063] Further, the diaphragm is a PE film, the thickness of the PE film is 40 μm - 50 μm, the ductility is 500% - 600%, the thermal decomposition temperature is greater than 60°C, and the anti-peeling viscosity is 30 g - 40 g / 25 mm; the operating temperature for film laminating of the film laminating machine is 45°C - 50°C, and the film laminating speed of the rolling bar of the film laminating machine is 5 m / min - 7 m / min. With a thickness of 40 μm - 50 μm, a ductility of 500% - 600%, and a thermal decomposition temperature of the diaphragm greater than 60°C, the PE film can have sufficient ductility, anti-cracking property, and wear resistance, and it is not easy for the PE film to remain on the stamping formed part after the film removal operation. If the thickness of the PE film is less than 40 μm, the PE film is too thin to be extended to cover the entire plate, affecting the covering effect of the PE film. During stamping, the PE film wrinkles or ruptures under the punching force, resulting in a reduction in the surface finish of the plate at the rupture of the PE film; if the thickness of the PE film is greater than 50 μm, the PE film is too thick, making the film laminating operation more complicated. More force and higher temperature are required to extend the PE film, consuming more energy. With a viscosity of 30 g - 40 g / 25 mm for the PE film, the PE film can be prevented from detaching from the plate to be stamped during the stamping operation, and can completely adhere to the surface of the plate with a PE film on the surface, and it can be ensured that there is no residual glue or PE film residue on the surface of the stamping formed part after the film removal operation. As a further preference, the operating temperature for film laminating of the film laminating machine is 45°C - 50°C, and the film laminating speed of the rolling bar of the film laminating machine is 5 m / min - 7 m / min, which can enable the PE film to be evenly extended and seamlessly fitted on the surface of the plate to be stamped without air bubbles, achieving effective wrapping of the plate to be stamped by the PE film, and separating the direct friction between the stamping die and the plate during the stamping operation, thereby preventing the surface finish of the plate from being reduced due to direct contact friction with the stamping die.

[0064] After the sheet is film-coated, the diaphragm plays a crucial role in the stamping deformation process. It can not only increase the consumption of the deformation force during stamping, improve the surface quality and internal quality of metal workpieces, but also reduce the wear of the die.

[0065] Example 1:

[0066] The aluminum sheet to be stamped is surface-treated to make the surface of the aluminum sheet to be stamped clean, dry, free of grease or other impurities, and keep it smooth; a PE film is coated on the surface of the aluminum sheet to be stamped, so that the PE film fits and adheres to the surface of the aluminum sheet to be stamped seamlessly, and the surface is the subsequent single welding surface.

[0067] Among them, the viscosity of the PE film is 40 g / 25 mm, the thickness is 45 μm, the ductility is 550%, the film-coating operation temperature of the film-coating machine is 45 - 50 °C, and the film-coating speed of the roller of the film-coating machine is 7 m / min;

[0068] The aluminum sheet coated with the PE film on the surface is stamped to obtain a stamped end plate test piece;

[0069] The PE film on the surface of the end plate test piece is completely torn off by using a film-tearing mechanism;

[0070] The end plate test piece with the PE film torn off is subjected to spray brazing treatment by using a spray brazing mechanism. The nozzle of the spray brazing mechanism moves linearly to perform surface spray brazing treatment on the subsequent welding surface of the end plate test piece;

[0071] The end plate test piece after spray brazing treatment and another aluminum sheet are fixed on a welding fixture. The other aluminum sheet is a flow-through plate. The end plate test piece and the flow-through plate enter the welding furnace together with the welding fixture and are welded into the water-cooled plate test piece.

[0072] The end plate test piece with the surface PE film torn off is subjected to stamping verification. Its thinning amount, flatness and roughness are not much different from those of the sheet processed by the traditional stamping process. For example, Figure 3As shown, in the roughness test, the roughness values of the minimum deformation part ① of the end plate test piece are Ra = 0.293 μm, Rz = 2.091 μm, and Rt = 2.956 μm respectively; the roughness values of the transition deformation part ② are Ra = 0.641 μm, Rz = 3.989 μm, and Rt = 4.732 μm respectively; the roughness values of the maximum deformation part ③ are Ra = 1.416 μm, Rz = 7.806 μm, and Rt = 8.627 μm respectively, meeting the technical requirements. Due to the absence of stamping oil, after the film is torn off, spray brazing is directly carried out. The brazing flux spraying effect is uniform without obvious aggregation phenomenon. Moreover, after spray brazing, welding is carried out. After helium leak detection and burst test, the water-cooled plate test piece meets the performance requirements. After batch verification, using the coating film to replace the stamping oil during the stamping process is applicable to both the case of large stamping deformation and the case of thin plates, and the performance after stamping and welding can meet the technical requirements.

[0073] The above embodiments are only the preferred solutions of the present invention, and are not specifically limited thereto. On this basis, targeted adjustments can be made according to actual needs to obtain different implementation manners. For example, in special cases, after evaluation, a small amount of stamping oil is required at some positions, and the degreasing process is not required after stamping, and so on. Since there are many possible implementation manners, they will not be enumerated one by one here.

[0074] The above has introduced in detail the heat exchanger manufacturing method and device provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A method for manufacturing a heat exchanger, characterized in that, It includes the following steps: Cover a diaphragm on the surface of the sheet to be stamped; Stamp the sheet with the diaphragm covered on its surface to obtain a stamped part; Remove the diaphragm on the surface of the stamped part; Weld the stamped part after removing the diaphragm.

2. The method for manufacturing a heat exchanger according to claim 1, characterized in that Provide another sheet; Weld the stamped part after removing the diaphragm to the other sheet; Before welding, perform spray brazing and coating of brazing filler metal on the stamped part after removing the diaphragm; Cover the diaphragm on one side of the sheet to be stamped, and the side with the diaphragm covered is the subsequent welding surface.

3. The method for manufacturing a heat exchanger according to claim 1 or 2, characterized in that, The diaphragm composition contains lubricating substances.

4. The method for manufacturing a heat exchanger according to claim 3, wherein The diaphragm is a PE film.

5. The manufacturing method of the heat exchanger according to claim 3, characterized in that, The thickness of the diaphragm is 40μm - 50μm, and / or The ductility of the diaphragm is 500% - 600%, the thermal decomposition temperature of the diaphragm is greater than 60°C, and / or The peel resistance viscosity of the diaphragm is 30g - 40g / 25mm.

6. The method for manufacturing a heat exchanger according to claim 1 or 2 or 4 or 5, characterized in that, Use a film laminating machine to cover the diaphragm on the surface of the sheet to be stamped. The film laminating operation temperature of the film laminating machine is 40°C - 55°C, and the film laminating speed of the roller of the film laminating machine is 4m / min - 8m / min.

7. The manufacturing method of the heat exchanger according to claim 2, characterized in that, Welding the stamped part after removing the film includes: placing the stamped part and the other sheet together on a welding fixture for fixation; The stamped part is an end plate, the other sheet is a flow-through plate, and the end plate and the flow-through plate enter a welding furnace together with the welding fixture and are welded into shape in the welding furnace; The film laminating operation temperature of the film laminating machine is 45°C - 50°C, and the film laminating speed of the roller of the film laminating machine is 5m / min - 7m / min.

8. Heat exchanger manufacturing device, characterized in that It includes: A film laminating mechanism configured to cover a diaphragm on the surface of the sheet to be stamped; A stamping mechanism configured to stamp the sheet with the diaphragm covered on its surface to obtain a stamped part; A film removing mechanism configured to remove the diaphragm on the surface of the stamped part; A welding mechanism configured to weld the stamped part after removing the diaphragm.

9. The heat exchanger manufacturing apparatus according to claim 8, wherein It further includes a spray brazing mechanism configured to perform spray brazing on the stamped part after removing the diaphragm; The film laminating mechanism includes a feeding component and a rolling component; the film laminating operation temperature of the film laminating mechanism is 40°C - 55°C, and the film laminating speed of the rolling component of the film laminating machine is 4m / min - 8m / min.

10. The heat exchanger manufacturing apparatus according to claim 8, wherein, The diaphragm is a PE film, the thickness of the PE film is 40μm - 50μm, the ductility is 500% - 600%, the thermal decomposition temperature of the diaphragm is greater than 60°C, and the peel resistance viscosity is 30g - 40g / 25mm; The film laminating operation temperature of the film laminating machine is 45°C - 50°C, and the film laminating speed of the roller of the film laminating machine is 5m / min - 7m / min.

Images