Fluid conducting assembly and manufacturing method thereof

Abstract

The invention discloses a fluid conduction assembly and a manufacturing method thereof, the fluid conduction assembly comprises a first part and a second part, the first part is provided with a flow channel groove, the first part and the second part are oppositely arranged and fixedly welded, and a flow channel is arranged between the first part and the second part; one of the first part and the second part is provided with a notch, the notch penetrates through the first part or the second part provided with the notch in the height direction, the other one of the first part and the second part is provided with a corresponding wall part, and the corresponding wall part and the notch are correspondingly arranged in the height direction; the notches do not penetrate through the corresponding wall parts in the height direction; the fluid conducting assembly is provided with a first welding part, and the first welding part is located between the bottom wall corresponding to the notch and the corresponding wall part. According to the manufacturing method, the fluid conduction assembly with low manufacturing cost can be obtained, and compared with a traditional process, the manufacturing method is lower in cost.

Description

Technical Field

[0001] The present invention relates to the field of thermal management technology, and in particular to a fluid conducting component and a manufacturing method thereof. Background Art

[0002] In a thermal management system, many components are generally required. Components can be used for various functions in the thermal management system. For example, components can be used to regulate flow, to conduct different flow paths, or to switch different flow paths, or to close specific flow paths, etc., so that the thermal management system can have different functions, such as heating, cooling, temperature control, etc.

[0003] Fluid flow assemblies are currently widely used in thermal management systems. These assemblies can perform the functions of one or more components. Because they have internal flow channels and must meet certain pressure-resistant requirements for use in thermal management systems, they are typically brazed with specialized tooling, resulting in high manufacturing costs. Summary of the Invention

[0004] The present invention provides a fluid conducting component with low manufacturing cost and a manufacturing method thereof.

[0005] As one aspect of the present invention, a fluid conducting assembly is provided, comprising a first part and a second part, wherein the first part has a flow channel groove, the first part and the second part are arranged opposite to each other and fixed by welding, and a flow channel is formed between the first part and the second part;

[0006] One of the first part and the second part has a notch, the notch penetrating the first part or the second part in which the notch is provided in the height direction, and the other of the first part and the second part has a corresponding wall portion, the corresponding wall portion and the notch are provided correspondingly in the height direction, and the notch does not penetrating the corresponding wall portion in the height direction;

[0007] The fluid conducting component has a first welding portion, and the first welding portion is located between the bottom wall corresponding to the recess and the corresponding wall portion.

[0008] The fluid conducting component has a first welding portion, which is located between the bottom wall corresponding to the recess and the corresponding wall portion. The first welding portion can be used for pre-positioning before brazing, eliminating the need for auxiliary tooling for positioning the first part and the second part, thereby reducing costs.

[0009] As another aspect of the present invention, a method for manufacturing a fluid conducting component is provided, comprising the following steps:

[0010] A first part and a second part are provided, wherein one of the first part and the second part is provided with a notch, wherein the notch penetrates the first part or the second part in which the notch is provided in the height direction, and wherein the other of the first part and the second part has a corresponding wall portion, wherein the corresponding wall portion and the notch are provided correspondingly in the height direction, and wherein the notch does not penetrate the corresponding wall portion in the height direction;

[0011] Pre-positioning the first part and the second part between the bottom wall corresponding to the notch and the corresponding wall portion by spot welding;

[0012] The pre-positioned first part and the second part are brazed.

[0013] The manufacturing method pre-positions the first part and the second part between the bottom wall corresponding to the recess and the corresponding wall portion by spot welding; and brazes the pre-positioned first part and the second part. In this way, the pre-positioning is achieved by spot welding, eliminating the use of positioning tooling before welding and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 A partial structural diagram of an embodiment of a fluid conducting component;

[0016] Figure 2 for Figure 1 A schematic diagram of a partial structure of the fluid conducting component from another perspective;

[0017] Figure 3 for Figure 2 A magnified schematic diagram of B in the middle;

[0018] Figure 4 A schematic structural diagram of another embodiment of a fluid conducting component;

[0019] Figure 5 for Figure 4 A schematic structural diagram of the first part of the fluid conducting component shown;

[0020] Figure 6 for Figure 4 A schematic structural diagram of the second part of the fluid conducting component shown;

[0021] Figure 7 This is a structural schematic diagram of another embodiment of a fluid conducting component;

[0022] Figure 8 for Figure 7 A schematic structural diagram of the first part of the fluid conducting component shown;

[0023] Figure 9 for Figure 7 A schematic structural diagram of the second part of the fluid conducting component shown;

[0024] Figure 10 This is a schematic structural diagram of another embodiment of a fluid conducting component;

[0025] Figure 11 for Figure 10 A schematic structural diagram of the first part of the fluid conducting component shown;

[0026] Figure 12 for Figure 10 A schematic structural diagram of the second part of the fluid conducting component shown;

[0027] Figure 13 This is a schematic structural diagram of yet another embodiment of a fluid conducting component;

[0028] Figure 14 for Figure 13 A schematic structural diagram of the first part of the fluid conducting component shown;

[0029] Figure 15 for Figure 13 A schematic structural diagram of the second part of the fluid conducting component shown;

[0030] Figure 16 A simplified schematic diagram of the cooperation between the first part and the second part;

[0031] Among them: 10, fluid conducting component; 11, first part; 111, flow channel; 112, flow channel; 113, first wall portion; 114, corresponding wall portion; 115, first hollow area; 12, second part; 121, second wall portion, 122, second hollow area; 13, recess; 131, bottom wall; 14, first welding portion; 15, second welding portion; 16, interface. DETAILED DESCRIPTION

[0032] Current new energy technologies involve numerous metal parts. Many metal parts are used to conduct fluids, for example, they contain single or multiple internal flow channels for fluid control. Because metal parts contain internal flow channels, they are sometimes constructed in two parts and welded together. The internal flow channels require effective welding to seal them, especially when the metal part has more than one, as different channels are sometimes used to connect different pressures in the system. Therefore, internal leakage must be strictly controlled. Brazing is commonly used to weld metal parts. The two parts are brazed in a brazing furnace. To achieve optimal welding results and minimize internal leakage, a brazing fixture is typically used to secure the parts before they enter the furnace. The fixture secures, compresses, or positions the components to be brazed. The fixture positions and clamps the components to facilitate welding. However, due to the large size and high heat absorption of the brazing fixture, energy consumption can be wasted during the brazing process. Furthermore, the assembly of the fixture is cumbersome, increasing the operational complexity of the brazing process.

[0033] Some of the metal parts used for thermal management components need to withstand high pressures of 2-10Mpa, and some metal parts have complex and changeable internal flow channels. Therefore, the thickness of the metal parts is relatively thick, and the flow channels are complex. It is difficult to ensure the welding quality of metal parts of a certain thickness by spot welding. Therefore, although the use of brazing fixtures will cause energy waste when brazing, this process is relatively low-cost and has guaranteed product quality. In addition, since the brazing fixture needs to be used in conjunction with the parts, a set of matching brazing fixtures needs to be set up separately for different parts. The use of fixtures will increase the external dimensions of the parts to be welded, such as the height dimension, so that the brazing furnace needs to have a larger size to accommodate the parts to be welded positioned by the brazing fixture. In this way, to a certain extent, the number of parts obtained by the brazing furnace at one time will be affected by the size of the brazing fixture.

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] As an implementation method, refer to Figures 1-6The fluid conducting component 10, 10' has a first part 11 and a second part 12, the first part 11 has a flow channel groove 111 (the flow channel groove is inside, and is shown on the surface of the part in the figure), the first part 11 and the second part 12 are arranged opposite to each other and welded and fixed, the second part 12 is used to close the flow channel groove 111 of the first part 11 so that a flow channel 112 is provided between the first part 11 and the second part 12, and the fluid conducting component has an interface 16 connected to the flow channel 112, and the interface 16 is used to connect with other parts.

[0036] One of the first and second parts 11, 12 has a notch 13 that extends vertically through the first or second part 11, 12, in which the notch 13 is provided. The other of the first and second parts 11, 12 has a corresponding wall 114 that corresponds to the notch 13 in the vertical direction, and the notch 13 does not extend vertically through the corresponding wall 114. In other words, in the vertical direction of the fluid conducting assembly, the projection of the notch 13 onto the other of the first and second parts 11, 12, which does not have the notch 13, is located on the first or second part 11, 12, in which the notch 13 is not provided. The fluid conducting assembly has a first weld 14 located between the bottom wall 131 corresponding to the notch 13 and the corresponding wall 114.

[0037] The above-mentioned fluid conducting component has a first welding portion 14 at the position of the recess 13. The first welding portion 14 can be realized by welding methods such as spot welding, and can be used to fix the position between the first part 11 and the second part 12. In this way, the processing of the fluid conducting component can save the use of specific tooling, which can reduce the cost of using specific tooling. Furthermore, it can also be used to control the gap between the first part 11 and the second part 12. Since the first welding portion 14 of the fluid conducting component of the present application is located between the bottom wall 131 corresponding to the recess 13 and the corresponding wall portion 114, that is, between the first part 11 and the other part 12 where the recess 13 is not provided, it can not only ensure that there is a good welding angle between the first part 11 and the second part 12, but also help to ensure the welding effect between the first part 11 and the second part 12.

[0038] The fluid conducting component has a second welding portion 15, which is located between the first part 11 and the second part 12. Figure 16The first part 11 and the second part 12 are arranged face to face, and a second welding portion 15 is provided between the opposing portions of the first part 11 and the second part 12. The first part 11 has a first wall portion 113 facing the second part 12, and the corresponding wall portion 114 is located on the first wall portion 113. The second part 12 has a second wall portion 121 facing the first part 11. In the height direction, the first wall portion 113 and the second wall portion 121 are arranged opposite each other, and the area facing each other between the first wall portion 113 and the second wall portion 121 has the second welding portion 15. The second welding portion 15 can ensure the welding strength of the first part 11 and the second part 12, and helps to close the flow channel 112 between the first part 11 and the second part 12.

[0039] More specifically, the fluid conducting assembly is obtained by brazing. After the first and second parts 11, 12 have a first weld 14, they are brazed together, resulting in a second weld 15 between the first and second parts 11, 12. During actual manufacturing, for example, a composite layer or brazing filler metal is provided on the first part 11, or a composite layer or brazing filler metal is provided on the second part 12, or both. When the product is brazed in a furnace, the composite layer or brazing filler metal melts, forming the second weld 15 between the first and second parts 11, 12.

[0040] The first part 11 has a flow channel groove 111, and the second part 12 has two or more recesses 13. A portion of the recess 13 is arranged around the flow channel groove 111, so that the flow channel groove 111 has a first welding portion 14 on the side thereof, which can be used to stabilize and fix the side position of the flow channel groove 111, thereby facilitating the sealing of the flow channel groove 111 during subsequent brazing.

[0041] As another embodiment, the first part 11 has a flow channel groove 111, and the second part 12 has two or more recesses 13. At least part of the recesses 13 is arranged around the periphery of the second part 12, so that the periphery of the second part 12 has a first welding portion 14, which can be used to stably fix the first part 11 and the second part 12, which is beneficial to the sealing during subsequent brazing.

[0042] The first component 11 has at least two flow channels 111, which are isolated from each other. In this embodiment, the first component 11 has three flow channels 111, each of which is independently provided. When the fluid communication assembly is used in a system, each flow channel 111 corresponds to a flow path and can be used to fill fluids with different properties, such as temperature, pressure, and fluid material. At least a portion of the recess 13 is located around each flow channel 111, allowing each flow channel 111 to have a first weld 14 around it, which is used to stabilize the position of the flow channel 111, further preventing fluid leakage between different flow channels 111, and improving the overall sealing performance of the fluid communication assembly and the required product performance.

[0043] It should be understood that at least a portion of the recess 13 is located on the periphery of each flow channel 111 or its corresponding position, which means that the recess can be located on the part where the flow channel is provided or on another part.

[0044] The first component 11 has a first hollow area 115, with at least a portion of the first wall 113 separating the first hollow area 115 from the flow channel 111. The second component 12 has a second hollow area 122, with the first hollow area 115 and the second hollow area 122 facing each other. A recess 13 is located in the second wall 121, with a portion of the recess 13 positioned at a corresponding position around the flow channel 111 and another portion of the recess 13 positioned around the second hollow area 122.

[0045] In this embodiment, the first hollow area 115 includes a first area and a second area. The first hollow area 115 is located in a position without the flow channel 111, so that the fluid conducting component can meet the performance requirements of the flow channel 112 while reducing its own weight and becoming more lightweight. At the same time, in this embodiment, a portion of the multiple recesses 13 are located at corresponding positions around the flow channel 111, and another portion of the recesses 13 are located around the second hollow area 122. In this way, the flow channel 111 can have a first welding portion 14 near the edge and near the center, further stabilizing the gap between the first part 11 and the second part 12 at the position around the flow channel 111, so that subsequent brazing can meet the set gap requirements between the first part 11 and the second part 12.

[0046] In this embodiment, a portion of the recess 13 is located at the edge of the fluid conducting component, so as to ensure the stability of the gap and position between the first part 11 and the second part 12 .

[0047] In this embodiment, the notches 13 are elongated, with at least portions of the notches 13 disposed on either side of the direction in which the flow channel 111 extends. Adjacent notches 13 are spaced 3-10 cm apart, and the length of each notch 13 is 1-8 cm. The 1-8 cm length of the notches 13 facilitates welding at the notches 13 with a welding gun, allowing the welding gun to be fine-tuned once in position, thereby forming the first weld 14. The 3-10 cm spacing between adjacent notches 13 ensures that the gap between the first and second parts 11, 12, meets the set gap during welding at the notches 13, allowing for subsequent brazing. However, if the notches 13 are spaced too closely together, the number of welds required increases, requiring more movement of the welding gun, and thus reducing manufacturing cycle time.

[0048] It should be understood that the shape of the recess 13 in this embodiment is merely illustrative, and the specific shape of the recess 13 is not limited, as long as there is a recess on the side of the part.

[0049] As another embodiment, refer to Figure 7-Figure 9 In the case where the fluid conducting component 10" has a small size, the first part 11 has a flow channel groove 111, the second part 12 has a notch 13, and the second part 12 cooperates with the first part 11 to form a flow channel 112 between the first part 11 and the second part 12. In this embodiment, the notch 13 is located on the outer periphery of the second part 12, and the first welding portion 14 is located at the notch 13. The first welding portion 14 fixes the first part 11 and the second part 12. Since the fluid conducting component has a small size, the first part 11 and the second part 12 can be fixed by the first welding portion 14 at the outer periphery of the notch 13, so that the first part 11 and the second part 12 are fixed. The recesses 12 can be fitted with a certain clearance between them, making them suitable for subsequent brazing. In this embodiment, the recesses 13 are long strips, with adjacent recesses 13 spaced 3-10 cm apart, and the length of the recesses 13 is 1-8 cm. The 1-8 cm length of the recesses 13 facilitates welding of the recesses 13 by the welding gun, so that after the welding gun is in place, it can be fine-tuned to weld the recesses 13, forming the first weld 14. The 3-10 cm spacing between adjacent recesses 13 ensures that the gap between the first part 11 and the second part 12 meets the set gap when welding at the recesses 13, making it suitable for subsequent brazing.

[0050] As another embodiment, refer to Figure 10-12 The fluid conducting component 10 '' includes a first part 11 and a second part 12. The first part 11 has at least two flow channel grooves 111. The at least two flow channel grooves 111 are isolated from each other in the first part 11; there are more than two recesses 13, and each flow channel groove 111 has a recess 13 on its peripheral side.

[0051] In this embodiment, there are three flow channels 111. The second part 12 has multiple notches 13 and a second hollow area 122. The second part 12 cooperates with the first part 11 to form a flow channel 112 between the first and second parts 11, 12. The three flow channels 111 can serve as three flow paths. The second hollow area 122 not only reduces the weight of the second part 12 but also facilitates pre-alignment with the first part 11.

[0052] The fluid conducting component has a second welding portion 15, the first part 11 has a first wall portion 113 facing the second part 12, and the second part 12 has a second wall portion 121 facing the first part 11. In the height direction, the first wall portion 113 and the second wall portion 121 are arranged opposite to each other, and the second welding portion 15 is located between the first wall portion 113 and the second wall portion 121.

[0053] The first component 11 has a first wall portion 113 facing the second component 12. The first wall portion 113 is located around the flow channel 111 and is welded to the second component 12. There are two or more recesses 13, each located on the second wall portion 121. In this embodiment, some of the recesses 13 are located around the outer periphery of the second component 12, while others are located around the second hollow area 122. A first weld 14 is located at the recess 13, securing the first component 11 and the second component 12. This ensures that the first weld 14 is present both inside and outside the fluid flow assembly, stabilizing the mating position of the first component 11 and the second component 12. The second hollow area 122 can be located between the two flow channels 111, which reduces the weight of the second component 12 while maintaining the sealing effect of the second component 12 on the flow channel 111 of the first component 11.

[0054] Adjacent notches 13 are spaced 1-10 cm apart, and the length of notches 13 is 0.2-8 cm. In this embodiment, the notches 13 located on the outer periphery of the second part 12 are long strips, adjacent notches 13 are spaced 3-10 cm apart, and the length of notches 13 is 1-8 cm. The length of notches 13 is 0.2-3 cm, and adjacent notches 13 are spaced 1-6 cm apart. The notches 13 located on the corresponding wall portion of the circumferential side of the second hollowed-out area of ​​the second part are arc-shaped, adjacent notches 13 are spaced 1-6 cm apart, and the length of notches 13 is 0.2-3 cm. This enables the first welding portion 14 at the notches 13 to stabilize the first part 11 and the second part 12. The notches 13 are provided on the periphery and the interior at the same time, and the notches 13 are provided in different shapes, so as to facilitate stabilizing the positions of the first part 11 and the second part 12 near the flow channel 111, and are more conducive to the quality of the welding between the first part 11 and the second part 12 on the circumferential side of the flow channel 111, thereby reducing the occurrence of cold welding. To further improve the welding quality, the length of the notch 13 can be 0.2-2 cm and the interval between adjacent notches 13 can be 1-4 cm; the length of the notch 13 can be 1-6 cm and the interval between notches 13 can be 3-8 cm; the length of the notch 13 can be 0.2-1 cm and the interval between adjacent notches 13 can be 1-3 cm; the length of the notch 13 can be 1-5 cm and the interval between notches 13 can be 3-7 cm.

[0055] As another embodiment, refer to Figure 13-15 The fluid conducting component 10"" includes a first part 11 and a second part 12. The first part 11 has a flow channel 111 and a first hollow area 115. In this embodiment, there are three flow channel 111. The second part 12 has multiple notches 13 and a second hollow area 122. The second part 12 cooperates with the first part 11 to form a flow channel 112 between the first part 11 and the second part 12. The three flow channel 111 can be used for three flow paths. The positions of the first hollow area 115 of the first part 11 and the second hollow area 122 of the second part 12 are roughly corresponding. The setting of the hollow areas of the first part 11 and the second part 12 can be used to reduce the weight of the fluid conducting component.

[0056] In this embodiment, the notches 13 are partially located on the outer periphery of the second part 12 and partially located on the outer peripheral edge corresponding to the second hollowed-out area 122. The notches 13 are spaced apart. The first welds 14 are located at the notches 13, securing the first and second parts 11, 12. Thus, first welds 14 are present both inside and outside the fluid conducting assembly, stabilizing the mating position of the first and second parts 11, 12. The first hollowed-out area 115 can be located between the two flow channels 111, reducing the weight of the first part 11 while maintaining the sealing effect of the second part 12 on the flow channels 111 of the first part 11.

[0057] As another embodiment, a portion of the recess 13 may be located in the first part 11, and a portion of the recess 13 may be located in the second part 12. In this case, a portion of the corresponding wall portion 114 is located in the second part 12, and a portion of the corresponding wall portion 114 is located in the first part 11. The positions of each recess 13 and its corresponding corresponding wall portion 114 in the height direction correspond to each other.

[0058] The following describes a method for manufacturing the fluid conducting component using a specific example. This method can alleviate the energy waste encountered in traditional brazing processes to a certain extent.

[0059] A first part 11 and a second part 12 are provided. A notch 13 is provided in one of the first part 11 and the second part 12. The notch 13 vertically penetrates the first part 11 or the second part 12 in which the notch 13 is provided. The other of the first part 11 and the second part 12 has a corresponding wall portion 114. The corresponding wall portion 114 and the notch 13 are vertically correspondingly provided. The notch 13 does not vertically penetrate the corresponding wall portion 114.

[0060] The first part 11 and the second part 12 are pre-positioned between the bottom wall 131 corresponding to the notch 13 and the corresponding wall portion 114 by spot welding;

[0061] The pre-positioned first part 11 and second part 12 are brazed.

[0062] Since this manufacturing method uses spot welding to pre-position the first part 11 and the second part 12, it can determine the positions of the first part 11 and the second part 12 before brazing, and then brazing is performed. In this way, most of the heat in the brazing furnace can be supplied to the first part 11 and the second part 12, and energy utilization is high. Therefore, this manufacturing method can not only achieve accurate part positioning during brazing, but also improve energy utilization during the brazing process.

[0063] There are many ways to spot weld. For example, the first part 11 and the second part 12 are pre-positioned by laser welding, argon arc welding, or resistance welding. Specifically, the bottom wall 131 corresponding to the notch 13 is welded to the corresponding wall portion 114 by laser welding. For example, there are 2 notches 13 positions, 3 notches 13 positions, 4 notches 13 positions, or more notches 13 positions between the two, to ensure the accurate positioning of the first part 11 and the second part 12. The laser welding method is simple. Pre-positioning is achieved by laser welding, and the subsequent brazing can eliminate the need for separately configured brazing tooling. This not only improves the energy utilization rate during the brazing process, but also reduces the space occupied by the part in the furnace welding furnace, thereby improving the utilization rate of the furnace.

[0064] Similarly, argon arc welding or resistance welding can be used to weld part of the circumference of the flow channel groove to the second part 12 to ensure accurate positioning between the first part 11 and the second part 12.

[0065] The first part 11 is made of aluminum alloy, stainless steel or copper, and the second part 12 is made of aluminum alloy, stainless steel or copper. The first part 11 and the second part 12 are brazed, which has a simple welding process and low cost.

[0066] The step of providing the notch 13 in one of the first part 11 and the second part 12 comprises:

[0067] One of the first part 11 and the second part 12 is punched, die-cast, cast or forged to form the recess 13. By this process, the recess 13 and the flow channel groove can be formed on the first part 11 or the second part 12 at one time, and the processing is convenient.

[0068] Specifically, the manufacturing method of the fluid conducting component includes the following steps:

[0069] The first part 11 and the second part 12 are stacked so that the placement positions of the first part 11 and the second part 12 are aligned.

[0070] Press the first part 11 and the second part 12, and use a press or other mechanism to compress the first part 11 and the second part 12 to reduce the gap between the first part 11 and the second part 12, so as to facilitate subsequent welding.

[0071] The first component 11 and the second component 12 are pre-positioned between the bottom wall 131 and the corresponding wall portion 114 of the recess 13 by spot welding.

[0072] Before spot welding, the first part 11 and the second part 12 are pressed down first, and then the first part 11 and the second part 12 are spot welded. In this way, the spot welding effect between the first part 11 and the second part 12 is better, the first part 11 and the second part 12 can be effectively pre-positioned, and the welding quality at the spot welding position can also be higher.

[0073] Considering that the first part 11 and the second part 12 may be relatively large and have more welding surfaces, the manufacturing method of the fluid conducting component may also be performed by spot welding at multiple positions, which may specifically include:

[0074] When spot welding, first move the welding gun to one of the notches 13;

[0075] At the location of the notch 13, the welding torch is aimed at the first part 11 or the second part 12 for welding. Due to the high thickness of the first and second parts 11 and 12, direct welding with the torch to ensure welding quality can easily lead to welding through the parts, resulting in weld failure. However, welding is performed between the edge of one of the first and second parts 11 and 12 and the other, that is, welding is performed between the bottom wall 131 corresponding to the notch 13 and the corresponding wall portion 114. The bottom wall 131 corresponding to the notch 13 is at the edge of the fluid conducting component. This method can better improve the welding quality between the two parts.

[0076] Move the welding gun to the other notch 13 position, where the two notches 13 positions are spaced a certain distance apart;

[0077] At this other notch 13, the welding gun is aligned with the edge of the first part 11 or the second part 12 for welding. Moving the welding gun to the other notch 13 allows welding at a wider range of locations, facilitating precise positioning between the first part 11 and the second part 12. Furthermore, welding at multiple locations further ensures a gap between the first part 11 and the second part 12, ensuring the quality of subsequent brazing. For ease of description, one of the notches 13 is referred to as the first location, and the other is referred to as the second location.

[0078] At least one of the first and second parts 11, 12, has a composite layer on one side facing the other. When the first and second parts 11, 12 are placed in the furnace, the composite layer melts, allowing the first and second parts 11, 12 to be welded and fixed. Because the first and second parts 11, 12 are pre-positioned by spot welding before entering the furnace, tooling can be eliminated. To ensure the quality of the weld between the first and second parts 11, 12, spot welding is crucial for positioning the first and second parts 11, 12. When the gap between the first and second parts is small, the composite layer melts, allowing the first and second parts 11, 12 to be welded together, reducing the risk of cold welds. If the gap between the first and second parts is too large, cold welds can easily form between the first and second parts 11, 12, affecting the quality of the weld.

[0079] Before the welding gun moves to another notch 13 position (second position), the following steps are also included:

[0080] The press releases the pressure on the first part 11 and the second part 12;

[0081] The carrying fixture that carries the first part 11 and the second part 12 is shifted;

[0082] The press presses the first part 11 and the second part 12 .

[0083] During spot welding, a press is used to compress the first and second parts 11, 12 before welding, effectively ensuring a small gap between the first and second parts 11, 12. This gap ensures that the gap between the first and second parts 11, 12 after welding meets the welding requirements. Since welding can occur in more than one position, and the welding position can vary significantly depending on the product, the use of a support fixture to coordinate welding with the welding gun reduces the movement path of the welding gun, making the movement path simpler. Furthermore, the use of a support fixture to shift is more conducive to tactile control than the use of a welding gun.

[0084] In addition, the displacement of the carrying tooling that carries the first part 11 and the second part 12 can also be replaced by the displacement of the action component of the press, or the two can be combined.

[0085] As a specific embodiment, the welding gun can be a laser welding robot. By shifting the carrying tool, the welding position can be accurately moved, making it easier to control the movement path and welding angle of the laser welding robot. The welding gun can be at a certain angle to the first part 11, allowing welding from the side.

[0086] In order to further ensure a smaller gap at the spot welding position, the manufacturing method of the fluid conducting component further includes the following steps:

[0087] The supporting fixtures of the first part 11 and the second part 12 are shifted so that the second position is adjacent to the corresponding clamping position of the press, and the distance between the second position and the clamping position is no more than 2 cm. In some cases, the distance is no more than 1 cm, so that the gap can be controlled more accurately.

[0088] The press presses the first part 11 and the second part 12 at a pressing position adjacent to the second position;

[0089] The welding gun moves, and the welding gun head is aligned with the second position to weld the first part 11 and the second part 12.

[0090] In this way, since the pressing position of the press is closer to the second position, the gap between the two parts at the second position before spot welding is less affected by the press. Therefore, during spot welding, the gap between the first part 11 and the second part 12 can be further guaranteed, so that a smaller gap can still be guaranteed after welding to meet the gap between the parts required for subsequent brazing.

[0091] Since the gap between the first part 11 and the second part 12 is a crucial factor for subsequent brazing, the manufacturing method of the fluid conducting component further includes the following steps:

[0092] The first detection device detects the gap between the first part 11 and the second part 12 at the second position after being pressed by the press;

[0093] If the detected gap is not greater than the set gap, the welding gun moves to the second position to weld the first part 11 and the second part 12 .

[0094] Before welding, the first detection equipment is used to detect the gap to ensure the gap required during welding and to ensure the gap between the first part 11 and the second part 12 in the pre-position when entering the furnace, which is beneficial to ensuring the welding quality of the first part 11 and the second part 12.

[0095] In the case that the flow channel groove is long, in order to further ensure the welding gap around the longer flow channel groove, there may be 2, 3, 4 or more welding positions around the flow channel groove.

[0096] The method for manufacturing the fluid conducting component further comprises the following steps:

[0097] After spot welding is completed, the second detection equipment detects the gap between the first part 11 and the second part 12 to ensure that the gap between the first part 11 and the second part 12 after spot welding is not greater than the second set gap, so that when the positioning tool is omitted in the brazing furnace, the smaller set gap before brazing can still be ensured, thereby reducing the number of cold welds during the welding process and meeting the quality requirements required for welding.

[0098] As an embodiment, when the first part 11 has only one flow channel groove, if the overall structure of the first part 11 is relatively simple and the external dimensions are small, the welding position on the peripheral side of the flow channel groove can be the outer periphery of the first part 11, that is, at least part of the outer periphery of the flow channel groove of the first part 11 can be spot welded, and the remaining positions can be welded by brazing.

[0099] As another embodiment, the overall structure of the first part 11 is relatively complex and can be applied to more than two flow channels. For example, each flow channel can be provided with a certain component, such as a valve, a sensor, etc. At the same time, the fluids in each flow channel can also have different pressures. For example, some flow channels can be high-pressure flow channels of the thermal management system, and some flow channels can be low-pressure flow channels of the thermal management system. As an embodiment, the thermal management system has a compressor, some flow channels can be connected to the outlet of the compressor, and some flow channels can be connected to the inlet of the compressor. To ensure the smooth operation of the system, the two flow channels with different pressures need to have good sealing properties.

[0100] As a specific embodiment, the first part 11 has at least two flow channels, the flow channels include a first channel and a second channel, and the first channel and the second channel are not connected in the first part 11; the welding method includes:

[0101] Weld at least a portion of the circumference of the first groove to a corresponding position of the second part 12 by spot welding;

[0102] At least a portion of the circumference of the second groove is welded to a corresponding position of the second part 12 by spot welding.

[0103] At least part of the circumferential side of the first groove and at least part of the circumferential side of the second groove are spot welded, so that both the circumferential side of the first groove and the circumferential side of the second groove have welding positions, which can further ensure the welding gap of the furnace welding of the circumferential side of the first groove and the circumferential side of the second groove when entering the furnace.

[0104] The manufacturing method of the fluid conducting component further comprises the following steps:

[0105] The first part 11 and the second part 12 are stacked so that the placement positions of the first part 11 and the second part 12 are aligned.

[0106] Press the first part 11 and the second part 12, and use a press or other mechanism to compress the first part 11 and the second part 12 to reduce the gap between the first part 11 and the second part 12, so as to facilitate subsequent welding.

[0107] Moving the welding gun to a first position on a peripheral side of the first groove;

[0108] At the first position, the welding gun is aimed at the edge of the first part 11 or the second part 12 for welding;

[0109] Moving the welding gun to a second position on the circumference of the second groove, wherein the first position and the second position are spaced a certain distance apart;

[0110] In the second position, the welding gun is aligned with the edge of the first part 11 or the second part 12 for welding.

[0111] Welding is performed at least partially on the circumference of the first groove and at least partially on the circumference of the second groove, so that both the circumference of the first groove and the circumference of the second groove can be fixed by spot welding.

[0112] At least one of the first and second parts 11, 12, has a composite layer on one side facing the other. When the first and second parts 11, 12 are placed in the furnace, the composite layer melts, allowing the first and second parts 11, 12 to be welded and fixed. Because the first and second parts 11, 12 are pre-positioned by spot welding before entering the furnace, tooling can be eliminated. To ensure the quality of the welds between the first and second parts 11, 12 on the periphery of the first and second grooves, spot welding is crucial for positioning the first and second parts 11, 12. When the gap between the first and second parts is small, the composite layer melts, allowing the first and second parts 11, 12 to be welded together, reducing the risk of cold welds. If the gap between the first and second parts is too large, cold welds can easily form between the first and second parts 11, 12, affecting welding quality.

[0113] Before the welding gun moves to the second position on the peripheral side of the second groove, the method further includes the following steps:

[0114] The press releases the pressure on the first part 11 and the second part 12;

[0115] The carrying fixture that carries the first part 11 and the second part 12 is shifted;

[0116] The press presses the first part 11 and the second part 12 .

[0117] During spot welding, a press is used to compress the first and second parts 11, 12 before welding, effectively ensuring a small gap between the first and second parts 11, 12. This gap ensures that the gap between the first and second parts 11, 12 after welding meets the welding requirements. Since welding can occur in more than one position, and the welding position can vary significantly depending on the product, the use of a support fixture to coordinate welding with the welding gun reduces the movement path of the welding gun, making the movement path simpler. Furthermore, the use of a support fixture to shift is more conducive to tactile control than the use of a welding gun.

[0118] The displacement of the carrying tooling for carrying the first part 11 and the second part 12 specifically includes the following steps:

[0119] The supporting fixtures for the first and second parts 11 and 12 are shifted so that the second position is adjacent to the corresponding pressing position of the press. The distance between the second position and the pressing position is no greater than 2 cm, and in some cases, no greater than 1 cm, so that the gap can be more accurately controlled.

[0120] Specifically, the press presses the first part 11 and the second part 12 : the press presses the first part 11 and the second part 12 at a position adjacent to the second location.

[0121] After pressing, the welding gun moves, and the welding gun head is aimed at the second position to weld the first part 11 and the second part 12.

[0122] In this way, since the pressing position of the press is closer to the second position, the gap between the two parts at the second position before spot welding is less affected by the press. Therefore, during spot welding, the gap between the first part 11 and the second part 12 can be further guaranteed, so that a smaller gap can still be guaranteed after welding to meet the gap between the parts required for subsequent brazing.

[0123] Before welding, the following steps are also included:

[0124] The first detection device detects the gap between the first part 11 and the second part 12 at the second position after being pressed by the press;

[0125] If the detected gap is not greater than the first set gap, the welding gun moves to the second position to weld the first part 11 and the second part 12 .

[0126] The interval between the first position and the second position is 1-10 cm, the length of the first position is 0.2-8 cm, and the length of the second position is 0.2-8 cm.

[0127] Before welding, the first detection equipment is used to detect the gap to ensure the gap required during welding and to ensure the gap between the first part 11 and the second part 12 in the pre-position when entering the furnace, which is beneficial to ensuring the welding quality of the first part 11 and the second part 12.

[0128] As another specific embodiment, the method for manufacturing the fluid conducting component further includes the following steps:

[0129] The first part 11 and the second part 12 are stacked so that the placement positions of the first part 11 and the second part 12 are aligned.

[0130] Press the first part 11 and the second part 12, and use a press or other mechanism to compress the first part 11 and the second part 12 to reduce the gap between the first part 11 and the second part 12, so as to facilitate subsequent welding.

[0131] Moving the welding gun to a first position on a peripheral side of the first groove;

[0132] At the first position, the welding gun is aimed at the edge of the first part 11 or the second part 12 for welding;

[0133] Moving the welding gun to a second position on the circumference of the first groove, wherein the first position and the second position are spaced a certain distance apart;

[0134] In the second position, the welding gun is aligned with the edge of the first part 11 or the second part 12 for welding.

[0135] At least two locations around the first groove are fixed by spot welding, which is more conducive to accurate positioning of the first groove and control of the gap between the first part 11 and the second part 12 around the first groove.

[0136] Before the welding gun moves to the second position on the peripheral side of the first groove, the method further includes the following steps:

[0137] The press releases the pressure on the first part 11 and the second part 12;

[0138] The carrying fixture that carries the first part 11 and the second part 12 is shifted;

[0139] The press presses the first part 11 and the second part 12 .

[0140] During spot welding, a press is used to compress the first and second parts 11, 12 before welding, effectively ensuring a small gap between the first and second parts 11, 12. This gap ensures that the gap between the first and second parts 11, 12 after welding meets the welding requirements. Since welding can occur in more than one position, and the welding position can vary significantly depending on the product, the use of a support fixture to coordinate welding with the welding gun reduces the movement path of the welding gun, making the movement path simpler. Furthermore, the use of a support fixture to shift is more conducive to tactile control than the use of a welding gun.

[0141] The displacement of the carrying tooling for carrying the first part 11 and the second part 12 specifically includes the following steps:

[0142] The supporting fixtures for the first and second parts 11 and 12 are shifted so that the second position is adjacent to the corresponding pressing position of the press. The distance between the second position and the pressing position is no greater than 2 cm, and in some cases, no greater than 1 cm, so that the gap can be more accurately controlled.

[0143] Specifically, the press presses the first part 11 and the second part 12 : the press presses the first part 11 and the second part 12 at a position adjacent to the second location.

[0144] After pressing, the welding gun moves, and the welding gun head is aimed at the second position to weld the first part 11 and the second part 12.

[0145] In this way, since the pressing position of the press is closer to the second position, the gap between the two parts at the second position before spot welding is less affected by the press. Therefore, during spot welding, the gap between the first part 11 and the second part 12 can be further guaranteed, so that a smaller gap can still be guaranteed after welding to meet the gap between the parts required for subsequent brazing.

[0146] Before welding, the following steps are also included:

[0147] The first detection device detects the gap between the first part 11 and the second part 12 at the second position after being pressed by the press;

[0148] If the detected gap is not greater than the first set gap, the welding gun moves to the second position to weld the first part 11 and the second part 12 .

[0149] The interval between the first position and the second position is 1-10 cm, the length of the first position is 0.2-8 cm, and the length of the second position is 0.2-8 cm.

[0150] Before welding, the first detection equipment is used to detect the gap to ensure the gap required during welding and to ensure the gap between the first part 11 and the second part 12 in the pre-position when entering the furnace, which is beneficial to ensuring the welding quality of the first part 11 and the second part 12.

[0151] The method for manufacturing the fluid conducting component further includes welding at a third location around the first groove, aiming a welding torch at the edge of the first part 11 or the second part 12. Alternatively, welding is performed at more locations around the first groove, aiming a welding torch at the edge of the first part 11 or the second part 12. It should be understood that at least some of the locations around the first groove may include two, three, four, or more locations, the specific number of which depends on the size of the part and the shape of the flow channel groove.

[0152] In addition, the manufacturing method of the fluid conducting component also includes welding at a third location around the second groove, aiming the welding gun at the edge of the first part 11 or the second part 12. Alternatively, welding is performed at more locations around the second groove, aiming the welding gun at the edge of the first part 11 or the second part 12. It should be understood that at least some of the locations around the second groove may include two, three, four, or more locations, the specific number of which depends on the size of the parts and the shape of the flow channel groove.

[0153] The steps of the various embodiments described above only briefly describe the first position and the second position. When there are multiple positions, the first part 11 and the second part 12 are first pressed and processed using a press. In some embodiments, the press can be fixed so that the pressing position of the press does not change, but in some embodiments, the position of the press can also be not fixed, so the pressing position of the press can also be changed. For example, after the press releases the pressing of the first part 11 and the second part 12, the next pressing position on the first part 11 and the second part 12 can be changed by shifting the supporting tooling, or by shifting the pressing part of the press, or by jointly shifting the pressing part of the supporting tooling and the press. After the pressing position is determined, the first part 11 and the second part 12 are then pressed by the press.

[0154] It should be noted that the first position and the second position are spaced 1-10 cm apart. At this distance, the gap between the first part 11 and the second part 12 can be well and stably maintained. The first position and the second position can be a single point or a distance between ends. For example, the length of the first position can be 0.2-8 cm, and the length of the second position can be 0.2-8 cm. In this case, the tightening and loosening of the press can be reduced while meeting the welding quality requirements, and the movement of the supporting tooling can also be reduced, which helps to shorten the cycle time and improve production efficiency.

[0155] In addition, it should be noted that in this article, the terms "first position" and "second position" are used only to distinguish them in the name to facilitate a clearer description of the welding method. These terms are not intended to limit the order, but only to represent the number of positions.

[0156] The first detection device and the second detection device mentioned above are also for better explanation of the structure. The first detection device and the second detection device can be different devices, of course, they can also be the same device. In this article, the first set gap of the first detection device and the second set gap of the second detection device can be the same or different.

[0157] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0158] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. For example, regarding the directional definitions of “front”, “back”, “left”, “right”, “up” and “down”, although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be combined, modified or replaced by each other, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A fluid conducting component, characterized in that: The invention comprises a first part (11) and a second part (12), wherein the first part (11) has a flow channel groove (111), the first part (11) and the second part (12) are arranged opposite to each other and fixed by welding, and a flow channel (112) is provided between the first part (11) and the second part (12); One of the first part (11) and the second part (12) has a notch (13), and the notch (13) penetrates the first part (11) or the second part (12) in the height direction, and the other of the first part (11) and the second part (12) has a corresponding wall portion (114), and the corresponding wall portion (114) and the notch (13) are arranged correspondingly in the height direction, and the notch (13) does not penetrate the corresponding wall portion (114) in the height direction; The fluid conducting component has a first welding portion (14), and the first welding portion (14) is located between a bottom wall (131) corresponding to the recess (13) and the corresponding wall portion (114).

2. The fluid conducting component according to claim 1, characterized in that: The fluid conducting component has a second welding portion (15), the first part (11) has a first wall portion (113) facing the second part (12), the corresponding wall portion (114) is located on the first wall portion (113), the second part (12) has a second wall portion 121 facing the first part (11), in the height direction, the first wall portion (113) and the second wall portion 121 are arranged opposite to each other, and the area between the first wall portion (113) and the second wall portion 121 facing each other has the second welding portion (15).

3. The fluid conducting component according to claim 2, characterized in that: The second part (12) has the notch (13), there are two or more notches (13), and the notches (13) are at least partially arranged around the outer periphery of the second part (12); The second welding portion (15) is a brazing welding portion.

4. The fluid conducting component according to claim 1, 2 or 3, characterized in that: The first part (11) has at least two flow channel grooves (111), and the at least two flow channel grooves (111) are isolated from each other in the first part (11); there are more than two recesses (13), and each flow channel groove (111) has a recess (13) on its circumferential side or at a corresponding position.

5. The fluid conducting component according to claim 2 or 3, characterized in that: The first wall portion (113) is located on a peripheral side of the flow channel (111), the first wall portion (113) and the second part (12) are welded, the first part (11) has a first hollow area (115), and at least a portion of the first wall portion (113) separates the first hollow area (115) and the flow channel (111); The second part (12) has a second hollow area (122), the first hollow area (115) and the second hollow area (122) correspond to each other, there are more than two notches (13), a part of the notches (13) is located at the edge of the second part (12) and / or another part of the notches (13) is located around the second hollow area (122).

6. The fluid conducting component according to claim 1, 2 or 3, characterized in that: The notches (13) are long strips, there are more than two notches (13), and at least parts of the notches (13) are arranged on both sides along the extension direction of the flow channel groove (111); adjacent notches (13) are spaced 3-10 cm apart, and the length of the notches (13) is 1-8 cm; Alternatively, the notch (13) is arc-shaped, there are more than two notches (13), and at least part of the notch (13) is arranged on both sides along the extension direction of the flow channel groove (111); adjacent notches (13) are spaced 1-6 cm apart, and the length of the notch (13) is 0.2-3 cm.

7. The fluid conducting component according to claim 1, 2 or 3, characterized in that: The first part (11) has the notch (13), there are two or more notches (13), and at least a portion of the notch (13) is arranged around the flow channel (111); adjacent notches (13) are spaced 1-10 cm apart, and the length of the notch (13) is 0.2-8 cm; The second welding portion (15) is a brazing welding portion.

8. The fluid conducting component according to claim 1, 2 or 3, characterized in that: There are more than two recesses (13), at least one of the recesses (13) is located on the first part (11), at least one of the recesses (13) is located on the second part (12), and at least part of the recesses (13) is arranged around the flow channel groove (111); adjacent recesses (13) are spaced 1-10 cm apart, and the length of the recess (13) is 0.2-8 cm; The second welding portion (15) is a brazing welding portion.

9. The fluid conducting component according to claim 1, 2 or 3, characterized in that: There are more than two notches (13), at least part of the notches (13) surrounds the outer peripheral edge of the second part (12), and the notches (13) are arranged at intervals; adjacent notches (13) are spaced 1-10 cm apart, and the length of the notches (13) is 0.2-8 cm.

10. The fluid conducting component according to claim 5, characterized in that: At least part of the notches (13) is arranged around the outer peripheral edge corresponding to the first hollow area (115), and the notches (13) are arranged at intervals; adjacent notches (13) are spaced 1-6 cm apart, and the length of the notches (13) is 0.2-3 cm; or adjacent notches (13) are spaced 3-10 cm apart, and the length of the notches (13) is 1-8 cm.

11. A method for manufacturing a fluid conducting component, characterized in that: The following steps are involved: A first part (11) and a second part (12) are provided, wherein a notch (13) is provided on one of the first part (11) and the second part (12), wherein the notch (13) penetrates the first part (11) or the second part (12) in the height direction, wherein the other of the first part (11) and the second part (12) has a corresponding wall portion (114), wherein the corresponding wall portion (114) and the notch (13) are provided correspondingly in the height direction, and the notch (13) does not penetrate the corresponding wall portion (114) in the height direction; Pre-positioning the first part (11) and the second part (12) between the bottom wall (131) corresponding to the notch (13) and the corresponding wall portion (114) by spot welding; The pre-positioned first part (11) and the second part (12) are brazed.

12. The manufacturing method according to claim 11, characterized in that: The step of providing a notch (13) in one of the first part (11) and the second part (12) comprises: The recess (13) is formed by stamping, die-casting, casting or forging one of the first part (11) and the second part (12).

13. The manufacturing method according to claim 11, characterized in that: The first part (11) and the second part (12) are pre-positioned by laser welding, argon arc welding or resistance welding.

14. The manufacturing method according to claim 11, 12 or 13, characterized in that: The following steps are involved: stacking the first part (11) and the second part (12); Pressing the first part (11) and the second part (12); Adjusting the positions of the welding gun and the first part and the second part, and aiming the welding gun at the first part (11) or the second part (12) at one of the notches (13) for welding; The positions of the welding gun and the first part and the second part are adjusted, and at the position of the other notch (13), the welding gun is aimed at the first part (11) or the second part (12) for welding, and the two notches (13) are spaced a certain distance apart.

15. The manufacturing method according to claim 14, characterized in that: At the other notch (13) position, before the welding gun is aimed at the first part (11) or the second part (12) for welding, the following steps are also included: The press releases the first part (11) and the second part (12); The carrying fixture carrying the first part (11) and the second part (12) is displaced and / or the actuating part of the press is displaced; The press presses the first part (11) and the second part (12).

16. The manufacturing method according to claim 15, characterized in that: The following steps are involved: The supporting fixtures of the first part (11) and the second part (12) are displaced and / or the actuating parts of the press are displaced so that the other notch (13) is located adjacent to the corresponding pressing position of the press, and the distance between the second position and the pressing position is not greater than 2 cm; The press presses the first part (11) and the second part (12) at the pressing position; The welding gun moves, and the gun head of the welding gun is aligned with another notch (13) to weld the first part (11) and the second part (12).

17. The manufacturing method according to claim 15 or 16, characterized in that: The following steps are involved: The first detection device detects the gap between the first part (11) and the second part (12) at the position of the other notch (13) after being pressed by the press; If the detected gap is not greater than the first set gap, the welding gun moves to align with the other notch (13) to weld the first part (11) and the second part (12).

18. The manufacturing method according to any one of claims 11 to 17, characterized in that: One of the notches (13) is named as a first position, and the other notch (13) is named as a second position. The first position and the second position are spaced 1-10 cm apart. The length of the first position is 0.2-8 cm, and the length of the second position is 0.2-8 cm.

19. The manufacturing method according to any one of claims 11 to 17, characterized in that: The first part (11) is made of aluminum alloy, stainless steel, or copper, and the second part (12) is made of aluminum alloy, stainless steel, or copper; and / or one of the first part (11) and the second part (12) has a composite layer, and the composite layer faces the other of the first part (11) and the second part (12); and / or a brazing material is provided between the first part and the second part for brazing; And / or the welding gun is a laser welding robot or a laser welder.

20. The manufacturing method according to any one of claims 11 to 17, characterized in that: After the pre-positioned first part (11) and the second part (12) are sent to the brazing furnace for brazing, the brazing further comprises the following steps: The second detection device detects the gap between the pre-positioned first part (11) and the second part (12), and if the detected gap is not greater than the second set gap, the pre-positioned first part (11) and the second part (12) are brazed.

Images