Brazing method for manufacturing piping integrated module and tooling for piping integrated module

Abstract

The application belongs to the technical field of brazing, and particularly relates to a tool for preparing a pipeline integrated module and a brazing method of the pipeline integrated module. The tool for preparing the pipeline integrated module is used for fixing the pipeline integrated module, and the tool comprises a clamp and a pressurizing assembly. The clamp has a clamping space, and the clamp has an open state and a clamping state. The clamp is arranged to place the pipeline integrated module into the clamping space in the open state, and to clamp the pipeline integrated module in the clamping space in the clamping state. The pressurizing assembly is arranged on at least one side of the clamp, and is used to drive the clamp to switch to the clamping state. The tool can clamp the pipeline integrated module in the clamping state of the clamp. The pressurizing assembly applies pressure to one side of the clamp. The molten filler in the brazing process can be extruded to the position of the gap in the cavity by the extrusion mode, effective filling of the gap is formed, and the pressure-bearing capacity of the cavity can be improved.

Description

Technical Field

[0001] This invention belongs to the field of brazing technology, specifically relating to a tooling for preparing a pipeline integrated module and a brazing method for the pipeline integrated module. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] The pipeline integration module is a structure formed by integrating two sheet metal parts into an independent cavity through stamping and welding processes. This type of cavity serves as an integrated solution for multiple complex pressure-bearing pipelines or components, offering advantages such as high integration level, simple process steps, and low processing costs.

[0004] Furnace brazing is a common manufacturing process for integrated piping modules. The typical process involves placing a sheet of brazing filler metal of a certain thickness at the contact surface between two plate-shaped components, securing them using spot welding, bolt tightening, or clamping fixtures, and then performing furnace brazing.

[0005] Because of the stamping process, gaps are formed inside the cavity. This brazing method cannot effectively fill the gaps, which reduces the pressure-bearing capacity of the gaps in the cavity and makes it unable to withstand high-pressure fluids. Summary of the Invention

[0006] The objective of this invention is to at least solve the problem of the inability to effectively fill the gaps in cavities in the prior art. This objective is achieved through the following technical solution:

[0007] A first aspect of the present invention provides a tooling for manufacturing a pipeline integration module, used to fix the pipeline integration module, characterized in that it comprises:

[0008] A clamp having a clamping space, the clamp having an open state and a clamping state, the clamp being configured to allow the pipeline integration module to be placed into the clamping space in the open state, and to clamp the pipeline integration module located in the clamping space in the clamping state;

[0009] A pressurizing assembly, disposed on at least one side of the clamp, is used to drive the clamp to switch from an open state to a clamping state;

[0010] A pressurizing component is disposed on at least one side of the clamp and is used to drive the clamping space to switch to the clamping state.

[0011] The tooling for preparing the pipeline integration module in this invention can clamp the pipeline integration module by clamping the fixture. By applying pressure to one side of the fixture through the pressure component, the molten brazing filler metal during the brazing process can be squeezed into the gap in the cavity by extrusion, thus effectively filling the gap and improving the pressure resistance of the cavity.

[0012] In addition, the tooling for preparing the pipeline integration module according to the present invention may also have the following additional technical features:

[0013] In some embodiments of the present invention, the clamp includes a first clamping plate and a second clamping plate that are separately disposed, and the first clamping plate and the second clamping plate are respectively disposed on opposite sides of the pipeline integration module.

[0014] In some embodiments of the present invention, the first clamping plate and the second clamping plate have the same shape and size.

[0015] In some embodiments of the present invention, the clamp is made of one of stainless steel, ceramic and graphite.

[0016] In some embodiments of the present invention, the surface roughness of the fixture facing the pipeline integration module is less than Ra3.2.

[0017] In some embodiments of the present invention, the pressurizing component includes a counterweight, and the number of the counterweights disposed on the clamp is adjustable;

[0018] And / or the pressurizing component includes an elastic pressure section, wherein the applied force of the elastic pressure section is adjustable.

[0019] A second aspect of the present invention provides a brazing method for a pipeline integration module, based on the tooling for preparing the pipeline integration module mentioned in the above embodiments, the brazing method comprising:

[0020] Prepare a first plate having a first groove and a second plate having a second groove;

[0021] A solder sheet is disposed on the contact surface between the first plate and the second plate;

[0022] The clamp is used to hold the first plate and the second plate;

[0023] Pressure is applied to at least one side of the fixture, and the fixture bearing the pressure, as well as the first plate and the second plate held by the fixture, are placed in a furnace for brazing.

[0024] Heating and heat preservation are performed according to the set parameters to complete the brazing of the pipeline integration module.

[0025] The brazing method of this invention uses a clamp set on the outside of the pipeline integration module to clamp the pipeline integration module. By applying pressure to one side of the clamp through a pressure component, the molten brazing filler metal during the brazing process can be squeezed into the gap in the cavity, effectively filling the gap and improving the pressure resistance of the cavity.

[0026] In addition, the brazing method for the pipeline integration module according to the present invention may also have the following additional technical features:

[0027] In some embodiments of the present invention, the pressure is positively correlated with the thickness of the first plate.

[0028] In some embodiments of the present invention, the pressure F is calculated using the formula k*t, 0.5≤k≤30, where t is the thickness of the first plate in mm, and the pressure F is in g / mm². 2 Where k is in g / mm 3 .

[0029] In some embodiments of the present invention, in the step of preparing the first plate with the first groove and the second plate with the second groove, the first plate with the first groove and the second plate with the second groove are prepared by a stamping process.

[0030] In some embodiments of the present invention, the clamp is provided with a clearance opening, the edge of which is the inner end of the clamp;

[0031] When the clamp is used to hold the first plate and the second plate, the distance between the inner end and the toe of the first stamped chamfer of the first plate is L, the radius of the first convex arc of the first stamped chamfer is R, -0.5R≤L≤R, wherein when the inner end of the clamp coincides with the toe of the first stamped chamfer, L=0;

[0032] When the inner end of the clamp is closer to the cavity than the toe end of the first stamping chamfer, L is a negative number;

[0033] When the inner end of the clamp is further away from the cavity than the toe of the first stamping chamfer, L is a positive number;

[0034] Both L and R are in mm. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Figure 1 A schematic diagram of the tooling for preparing the pipeline integration module according to an embodiment of the present invention is shown in use (pressurization components are not shown);

[0037] Figure 2 for Figure 1 A schematic diagram of the structure of the first clamping plate shown in the figure;

[0038] Figure 3 for Figure 1 A schematic diagram of the structure of the second clamping plate shown;

[0039] Figure 4 A schematic diagram of the tooling used to prepare the pipeline integration module during its use.

[0040] Figure 5 for Figure 1 A three-dimensional structural diagram of the pipeline integration module shown;

[0041] Figure 6 for Figure 5 The diagram shows a three-dimensional structure of the pipeline integration module from a second-view perspective.

[0042] Figure 7 This is a schematic diagram of the brazing joint structure of the pipeline integration module under three different pressures;

[0043] Figure 8 for Figure 7 The diagram shows a structural schematic of the brazing seam of the pipeline integration module as seen from another perspective.

[0044] The attached figures are labeled as follows:

[0045] 10 is a clamp; 11 is the first clamping plate; 111 is the first clearance opening; 12 is the second clamping plate; 121 is the second clearance hole;

[0046] 20 is a pressurization component;

[0047] 30 is a pipeline integration module;

[0048] 31 is the first plate; 311 is the first groove; 313 is the air inlet; 314 is the first stamped chamfer; 315 is the first convex arc; 316 is the first convex bulge; 317 is the oil return port;

[0049] 32 is the second plate; 321 is the second groove; 322 is the first through hole; 323 is the second convex bulge; 324 is the second stamped chamfer; 325 is the second convex arc; 326 is the guide part; 327 is the air outlet. Detailed Implementation

[0050] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0051] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0052] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0053] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0054] like Figures 1 to 8 As shown, according to a first aspect of the present invention, a tooling for manufacturing a pipeline integration module 30 is provided, such as... Figures 1 to 4 As shown, Figure 1 The diagram schematically illustrates the structure of the tooling used for preparing the pipeline integration module 30 according to an embodiment of the present invention in a usable state (pressurization assembly 20 is not shown). Figure 2 for Figure 1 The schematic diagram of the structure of the first clamping plate 11 shown is shown below. Figure 3 for Figure 1 The schematic diagram of the structure of the second clamping plate 12 shown is shown below. Figure 4 This is a schematic diagram of the tooling used to prepare the pipe integration module 30 during use. The tooling is used when welding the pipe integration module 30. The tooling for preparing the pipe integration module 30 includes a clamp 10 and a pressurizing component 20. The clamp 10 has a clamping space and is configured to have an open state and a clamping state. The clamp 10 is configured to allow the pipe integration module 30 to be placed in the open state and to clamp the pipe integration module 30 located in the clamping space in the clamping state. The pressurizing component 20 is disposed on at least one side of the clamp 10 and is used to drive the clamp 10 to switch to the clamping state.

[0055] The tooling for preparing the pipeline integration module 30 in this invention uses a clamping fixture 10 to hold the pipeline integration module 30 in a clamping state. Pressure is applied to one side of the clamping fixture 10 by the pressurizing component 20, which forces the molten brazing filler metal during the brazing process towards the gap in the cavity, effectively filling the gap and improving the cavity's pressure-bearing capacity. The location of the gap is described in [reference needed]. Figure 4 .from Figure 4 As can be seen, the amount of filling in the gaps is relatively small, which needs further improvement.

[0056] The clamp has an open state and a clamped state, which can change the function of the clamp 10 on the pipe integration module 30. This facilitates the removal of the pipe integration module 30 or the clamping of the pipe integration module 30 placed in the clamping space. This allows pressure to be applied to the clamp, ensuring that the pressure acts on the contact surface of the pipe integration module 30. During the brazing process, this pressure brazing of the pipe integration module 30 better fills the gaps, resulting in a thicker brazed seam at the gap location. The brazed seam thickness here is... Figure 4 The dimension of the drill bit in the height direction.

[0057] It should be noted that the pressure-applying component 20 can be set on one side of the clamp 10 to apply pressure to the clamp 10 from one side, or it can be set on both sides of the clamp 10 to apply pressure from both sides of the clamp 10 simultaneously, thereby achieving the pressure effect on the molten brazing filler metal, filling the gap position, and welding the contact surface.

[0058] In some optional embodiments, the clamp 10 includes a first clamping plate 11 and a second clamping plate 12 that are separately disposed, with the first clamping plate 11 and the second clamping plate 12 respectively disposed on opposite sides of the pipeline integration module 30. That is, the first clamping plate 11 and the second clamping plate 12 are respectively disposed on the upper side or the lower side of the pipeline integration module 30, thereby realizing clamping of the pipeline integration module 30 from two directions.

[0059] The present invention adopts a split structure, which can facilitate installation before welding. Before welding, one of the first clamping plate 11 and the second clamping plate 12 is placed on the upper surface of the pipeline integration module 30, and the other is placed on the lower surface of the pipeline integration module 30.

[0060] In some optional embodiments, the first clamping plate 11 and the second clamping plate 12 have the same shape and size. The outer contour of the first clamping plate 11 and the second clamping plate 12 is larger than the outer contour of the pipeline integration module 30. Typically, the outer contour of the pipeline integration module 30 is rectangular. Therefore, the first clamping plate 11 and the second clamping plate 12 are rectangular plate structures in general.

[0061] Since the fixture 10 needs to be placed in a brazing furnace for use, the material of the fixture 10 needs to have high temperature resistance, so that it will not melt or deform at high temperatures. Therefore, the material of the fixture 10 can be one of stainless steel, ceramic and graphite, which have high high temperature resistance.

[0062] In some optional embodiments, the surface roughness of the fixture 10 facing the piping integration module 30 is less than Ra3.2, such as Ra2.5 or Ra1.6. The surface roughness of the fixture 10 will affect the surface condition of the piping integration module 30. If the surface roughness of the fixture 10 is too large, it will damage the surface condition of the piping integration module 30. However, if the surface roughness of the fixture 10 is too small, it will lead to an increase in processing costs. Therefore, the surface roughness of the fixture 10 can be slightly less than Ra3.2.

[0063] In some optional embodiments, the pressurizing component 20 includes a counterweight and / or an elastic pressure section. The force applied by the elastic pressure section is adjustable. The pressure is adjusted by adding different numbers of counterweights, and once the number of counterweights is determined, the pressure will not change. The pressure can be adjusted by means of adjustable components, which can be implemented using existing adjustable pressure components.

[0064] exist Figure 4 In the process, the first clamping plate 11 is disposed on the upper part of the pipeline integration module 30, and the second clamping plate 12 is disposed on the lower part of the pipeline integration module 30, fixing the pipeline integration module 30 from two directions. The pressurizing component 20 is disposed on the upper side of the first clamping plate 11, applying pressure to the pipeline integration module 30 from the upper side of the first clamping plate 11.

[0065] To facilitate the installation of the clamp 10, the clamp 10 is provided with a clearance opening, the edge of which is the inner end of the clamp 10. Specifically, the first clamping plate 11 is provided with a first clearance opening 111, the edge of which is the inner end of the first clamping plate 11, and the second clamping plate 12 is provided with a second clearance opening 121, the edge of which is the inner end of the second clamping plate 12. By providing the first clearance opening 111 and the second clearance opening 121, the cavity formed by the two grooves of the pipeline integration module 30 can be cleared, and the manufacturing cost of the clamp 10 can be saved.

[0066] It should be noted that the first clearance opening 111 differs from the outer contour of the cavity. Figure 4 As can be seen, the first clamping plate 11 and the second clamping plate 12 can pressurize only part of the contact surface of the pipeline integration module 30. The distance between the inner end of the first clamping plate 11 and the toe end of the first stamping chamfer 314 is L. Correspondingly, the distance between the inner end of the second clamping plate 12 and the toe end of the second stamping chamfer 324 is also L. The toe end of the first stamping chamfer 314 is the end of the first convex arc 315 in the horizontal direction, and the toe end of the second stamping chamfer 324 is the end of the second convex arc 325 in the horizontal direction.

[0067] The radius of the first convex arc 315 of the first stamped chamfer 314 is the same as the radius of the second convex arc 325 of the second stamped chamfer 324, both being R. Here, L is required to be in the range of -0.5R to R. For example, if R is 5mm, then L is a distance between -2.5mm and 5mm. When L is 0, the first clamping plate 11 fully covers the contact surface of the pipeline integration module 30, allowing all the brazing filler metal to be squeezed.

[0068] exist Figure 4 In this state, L is a positive number, meaning that the inner end of the first clamping plate 11 and the toe of the first stamping chamfer 314 are at a certain distance, and there is an overlapping portion between the inner end of the first clamping plate 11 and the toe of the first stamping chamfer 314. In this state, the corresponding distance L is a negative number. When the inner end of the first clamping plate 11 and the toe of the first stamping chamfer 314 are aligned in the vertical direction, L is 0.

[0069] Conversely, if L is greater than R, areas where no pressure was applied during welding will deform due to stress release and high-temperature softening, leading to increased or uneven gaps and insufficient weld seam thickness. Here, thickness refers to the weld seam dimension in the thickness direction of the pipe integration module 30. However, if L is less than -0.5R, the cavity of the pipe integration module 30 will deform under high-temperature conditions, making it difficult to guarantee the design dimensions. Furthermore, the tensile strength of the material decreases sharply under high-temperature conditions, easily leading to material cracking. The material here refers to the material of the pipe integration module 30, which is generally stainless steel, such as 308 or 2209 stainless steel.

[0070] Furthermore, regarding the thickness of the first clamping plate 11 and the second clamping plate 12, the thickness, length, and width of the first clamping plate 11 and the second clamping plate 12 are the same, and both the first clamping plate 11 and the second clamping plate 12 are contoured. The thickness of the first clamping plate 11 is slightly greater than half of the outer diameter of the cavity of the pipeline integration module 30, the length of the first clamping plate 11 is slightly greater than the length of the pipeline integration module 30, and the width of the first clamping plate 11 is slightly greater than the width of the pipeline integration module 30.

[0071] Continue to refer to Figures 5 to 7 As shown, where, Figure 5 for Figure 1 The diagram shows a three-dimensional structure of the pipeline integration module 30. Figure 6 for Figure 5The diagram shows a three-dimensional structural schematic of the pipeline integration module 30 from a second-view perspective. The first plate 31 has a first groove 311 along its thickness direction, and the first groove 311 has a first stamped chamfer 314 at the end of its opening. This is because the first groove 311 is made using a stamping process; therefore, a stamped chamfer is unavoidable at the end of the opening of the first groove 311. This stamped chamfer at the end of the opening of the first groove 311 is referred to as the first stamped chamfer 314.

[0072] Similarly, the second plate 32 is provided with a second groove 321 in its thickness direction. The second groove 321 has a second stamped chamfer 324 at the end of the groove opening. This is because the second groove 321 is made by stamping process. Therefore, a stamped chamfer will inevitably appear at the end of the groove opening of the second groove 321. Here, the stamped chamfer at the end of the groove opening of the second groove 321 is called the second stamped chamfer 324.

[0073] The first plate 31 and the second plate 32 are fitted together, and the second groove 321 is correspondingly provided with the first groove 311 and surrounds to form a cavity. The cavity has a gap between the first stamping chamfer 314 and the second stamping chamfer 324.

[0074] It should be noted that one of the first plate 31 and the second plate 32 is provided with a first through hole 322. There are multiple first through holes 322. The weld seam can be repaired through the first through holes 322, which facilitates the subsequent maintenance and repair of the pipeline integrated module 30. For example, when a fluid leak occurs, the weld can be repaired through the first through hole 322 near the leak location, depending on the location of the fluid leak.

[0075] The first through hole 322 is circumferentially arranged around the cavity to facilitate repair welding. Of course, if necessary, a through hole can also be provided on the second plate 32, and this through hole is staggered from the first through hole 322, which will not be described here.

[0076] It should be noted that the first convex arc 315 refers to the surface of the first stamping chamfer 314 facing the inside of the cavity, and the second convex arc 325 refers to the surface of the second stamping chamfer 324 facing the inside of the cavity. The first convex arc 315 and the second convex arc 325 are symmetrically and correspondingly arranged. If there is no gap between the first stamping chamfer 314 and the second stamping chamfer 324, the cross-section of the cavity formed by the first groove 311 and the second groove 321 is a regular circle. However, due to the existence of gaps, the cross-section of the cavity formed by the first groove 311 and the second groove 321 is an irregular circle. Therefore, it is necessary to fill the gaps corresponding to the non-circular parts to make the cross-section of the cavity closer to a circle, thereby improving the pressure resistance and fatigue resistance of the cavity.

[0077] In addition, both the first plate 31 and the second plate 32 are made of stainless steel. Compared with copper alloys, stainless steel is less expensive and has better stamping performance, which can reduce the cost of the outdoor unit of the air conditioner. For example, 308 stainless steel or 2209 stainless steel can be used.

[0078] The brazing filler metal layer used here can be solid or paste-like. For example, using foil-like or paste-like filler metal can achieve these functions.

[0079] In some alternative embodiments, refer to Figure 1 As shown, when the cavity is used for oil separation, an air inlet 313 is provided on the first groove 311, and an air inlet pipe is connected to the air inlet 313 to deliver gas into the cavity. Additionally, a first convex 316 is formed at one end of the first groove 311 to change the flow direction of the fluid. An oil return port 317 is formed at the other end of the first groove 311, and an oil return pipe connected to the oil return port 317 is used to transfer the separated lubricating oil. Correspondingly, a second convex 323 is provided on the second groove 321, corresponding to the first convex 316. An air outlet 327 is provided on the second convex 323, which is connected to an air outlet pipe. Both the first convex 316 and the second convex 323 are circular, but they can also be square or other shapes.

[0080] In some optional embodiments, a guide portion 326 is also provided at the position corresponding to the air inlet 313 in the second groove 321. The guide portion 326 is made by a stamping process and can guide the gas entering from the air inlet 313, so that the gas can smoothly enter the interior of the cavity. Correspondingly, in order to avoid the clamp 10 affecting the gas, a stamping port is also provided on the clamp 10, which forms part of the clearance opening.

[0081] A second aspect of the present invention provides a brazing method for a pipeline integration module 30, which is implemented using the tooling mentioned in the above embodiments for preparing the pipeline integration module 30. The brazing method includes:

[0082] S11. Prepare a first plate 31 having a first groove 311 and a second plate 32 having a second groove 321;

[0083] S12. Place the brazing filler metal sheet on the contact surface between the first plate 31 and the second plate 32;

[0084] S13. Use clamp 10 to clamp the first plate 31 and the second plate 32;

[0085] S14. Apply pressure to at least one side of the clamp 10, and place the clamp 10 bearing the pressure, as well as the first plate 31 and the second plate 32 held by the clamp 10, into the furnace for brazing.

[0086] S15. Heat and maintain the temperature according to the set parameters to complete the brazing of the pipeline integration module 30.

[0087] In S15, the main setting parameter is temperature, which ranges from 1110 degrees Celsius to 1135 degrees Celsius. The heating rate can be fast or slow, and the holding time can be determined based on the thickness, specifically based on the total thickness of the first plate 31 and the second plate 32.

[0088] It should be noted that pressure can be applied to at least one side of the clamp 10 by means of a counterweight. Placing the counterweight on the first clamping plate 11 or the second clamping plate 12 is convenient for operation and easy to control the pressure.

[0089] In some alternative embodiments, the pressure is positively correlated with the thickness of the first plate 31, that is, the pressure is approximately proportional to the thickness of the first plate 31. When the thickness of the first plate 31 is large, the pressure can be large, thereby avoiding the pressure from causing the first plate 31 to deform.

[0090] In some optional embodiments, the pressure F is calculated using the formula k*t, 0.5≤k≤30, where t is the thickness of the first plate 31 in mm, and the pressure F is in g / mm². 2 The unit of the constant here is g / mm². 3 If the pressure F is too low, it will not be able to squeeze the molten solder to the gap position after it melts. However, if the pressure F is too high, it will increase the cost of manufacturing the fixture 10, and there is also a risk of insufficient solder gap at the plane contact area.

[0091] For example, when the thickness of the first plate 31 is 3 mm, the pressure F ranges from 1.5 to 9 g / mm. 2 Any pressure within this range is acceptable. Of course, the higher the pressure, the better the filling effect on the gap. For example, the pressure F can be selected as 3, 4, or 5 g / mm. 2 Either is acceptable.

[0092] It should be noted that the pressure F unit here is measured in terms of mass per unit area. Compared to the Newton in the International System of Units (SI), this method is easier to calculate, more intuitive, and easier to measure.

[0093] In some alternative embodiments, the first plate 31 with the first groove 311 and the second plate 32 with the second groove 321 are prepared by a stamping process. The stamping process is a common way to prepare grooves, which is low in cost and highly efficient.

[0094] When the clamp 10 is used to clamp the first plate 31 and the second plate 32, the distance between the inner end of the clamp 10 and the toe of the first stamping chamfer 314 of the first plate 31 is L, and the radius of the first convex arc 315 of the first stamping chamfer 314 is R, where -0.5R≤L≤R. Specifically, when the inner end of the clamp 10 coincides with the toe of the first stamping chamfer 314 of the first plate 31, L=0; when the inner end of the clamp 10 is closer to the cavity than the toe of the first stamping chamfer 314 of the first plate 31, L is negative; when the inner end of the clamp 10 is farther from the cavity than the toe of the first stamping chamfer 314 of the first plate 31, L is positive. The first convex arc 315 can also be replaced by the second convex arc 325. The units for L and R are both mm.

[0095] The following experiment will compare the filling effects under different pressures, referring to... Figure 7 and Figure 8 As shown in Figure 7, this is a schematic diagram of the brazing joint structure of the pipeline integration module 30 under three different pressures. Figure 8 for Figure 7 Another structural schematic diagram of the brazing seam of the pipeline integration module 30 shown.

[0096] The brazing temperature for these three tests was 1130 degrees Celsius, and the brazing layer was copper foil. Except for the pressure, all other test conditions were the same.

[0097] from Figure 7 As can be seen, at a pressure of 0.2 g / mm 2 At this pressure, the filling effect on the gaps is relatively poor, especially at a pressure of 0.33 g / mm. 2 At this time, the filling effect on the gap is moderate, with a pressure of 0.66 g / mm. 2 At a pressure of 0.2 g / mm, the filling effect on the gap is best; however, this is only achieved at a pressure of 0.2 g / mm. 2 When pressure is applied, the filling effect on gaps is significantly better than when there is no pressure.

[0098] from Figure 8 As can be seen, the thickness of the brazing seam from left to right is 0.947mm, 1.327mm and 2mm respectively. The thickness of the brazing seam is significantly thicker, and the filling of the gap is more obvious. When using the non-pressure brazing method, the thickness of the brazing seam is 0.3 to 0.5mm. It can be seen that the thickness of the brazing seam can be significantly increased by applying pressure to the brazing method.

[0099] The corresponding tensile strengths are 344 MPa, 362 MPa, and 411 MPa, respectively, showing a significant increase in strength. Regardless of the test data, the filler thickness is greater than 0.94 mm, and the tensile strength is greater than the 195 MPa tensile strength in the standard for copper. All the tensile strengths mentioned above are data under room temperature conditions.

[0100] In addition, the first plate 31 and the second plate 32 may have problems with internal stress and poor flatness during the forming process, which will result in uneven gaps during the brazing process after assembly. When the brazing filler metal melts, there will be uneven wetting. By using the fixture 10 and pressure assembly 20 in this invention, the impact of such defects on brazing can be reduced.

[0101] In addition, when using the direct brazing method, the thickness of the brazing filler layer needs to be greater than or equal to 0.05 mm, which results in a large gap in the welded joint and low strength. However, the pressure brazing method of this invention can make the thickness of the welded joint less than the thickness of the brazing filler sheet, which can improve the strength of the welded joint to a certain extent.

[0102] The experimental results above show that by applying pressure during the brazing process, the present invention can eliminate the adverse effects of poor flatness of the stamping plate and internal stress of stamping on brazing. It can also reduce the thickness of the brazing seam between the contact surfaces, squeeze the molten brazing material to the gap, effectively improve the gap filling effect, and increase the tensile strength of the brazing seam.

[0103] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A tooling for preparing a pipeline integration module, used to fix the pipeline integration module, characterized in that, include: A clamp having a clamping space, the clamp having an open state and a clamping state, the clamp being configured to allow the pipeline integration module to be placed into the clamping space in the open state, and to clamp the pipeline integration module located in the clamping space in the clamping state; A pressurizing assembly, disposed on at least one side of the clamp, is used to drive the clamp to switch from an open state to a clamping state; The clamp includes a first clamping plate and a second clamping plate. The first plate of the pipeline integration module is provided with a first groove along the thickness direction. The first groove has a first stamped chamfer at the end of the groove opening. The first clamping plate is provided with a first clearance opening. The edge of the first clearance opening is the inner end of the first clamping plate. The distance between the inner end of the first clamping plate and the toe end of the first stamped chamfer is L. The radius of the first convex arc of the first stamped chamfer is R, -0.5R≤L≤R; The first clamping plate and the second clamping plate are respectively disposed on opposite sides of the pipeline integration module; the thickness of the first clamping plate is greater than half of the outer diameter of the cavity of the pipeline integration module.

2. The tooling for preparing the pipeline integration module according to claim 1, characterized in that, The first clamp and the second clamp are identical in shape and size.

3. The tooling for preparing the pipeline integration module according to claim 1, characterized in that, The clamp is made of one of the following materials: stainless steel, ceramic, or graphite.

4. The tooling for preparing the pipeline integration module according to claim 1, characterized in that, The surface roughness of the fixture facing the pipeline integration module is less than Ra3.

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5. The tooling for preparing the pipeline integration module according to claim 1, characterized in that, The pressurizing component includes counterweights, and the number of counterweights disposed on the clamp is adjustable. And / or the pressurizing component includes an elastic pressure section, wherein the applied force of the elastic pressure section is adjustable.

6. A brazing method for a pipeline integrated module, based on the tooling for preparing the pipeline integrated module according to any one of claims 1 to 5, characterized in that, The brazing method includes: Prepare a first plate having a first groove and a second plate having a second groove; A solder sheet is disposed on the contact surface between the first plate and the second plate; The first plate and the second plate are placed in the clamp; Pressure is applied to at least one side of the fixture, and the fixture bearing the pressure, as well as the first plate and the second plate held by the fixture, are placed in a furnace for brazing. Heating and heat preservation are performed according to the set parameters to complete the brazing of the pipeline integration module.

7. The brazing method for the pipeline integration module according to claim 6, characterized in that, The pressure is positively correlated with the thickness of the first plate.

8. The brazing method for the pipeline integration module according to claim 7, characterized in that, The calculation formula of the pressure F is k*t0.5, 0.5≤k≤30, wherein t is the thickness of the first plate body, the unit of which is mm, and the unit of the pressure F is g / mm 2 wherein the unit of k is g / mm 3 .

9. The brazing method for the pipeline integration module according to claim 6, characterized in that, In the step of preparing the first plate with the first groove and the second plate with the second groove, the first plate with the first groove and the second plate with the second groove are prepared by a stamping process.

10. The brazing method for the pipeline integration module according to claim 6, characterized in that, The clamp is provided with a clearance opening, and the edge of the clearance opening is the inner end of the clamp; When the clamp is used to hold the first plate and the second plate, the distance between the inner end and the toe of the first stamping chamfer of the first plate is L, the radius of the first convex arc of the first stamping chamfer is R, -0.5R≤L≤R, wherein when the inner end of the clamp coincides with the toe of the first stamping chamfer, L=0; When the inner end of the clamp is closer to the cavity than the toe end of the first stamping chamfer, L is a negative number; When the inner end of the fixture is further away from the cavity than the toe of the first stamping chamfer, L is a positive number; where the units of L and R are both mm.

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