Diffusion welding graphite jig
By designing diffusion welding graphite fixtures that match limit grooves and convex parts, welding defects caused by improper pressure control of traditional fixtures are solved, and the sealing and welding effect of the temperature uniform plate are improved, and production efficiency is improved.
Patent Information
- Application Number
- CN202422288254.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-18
AI Technical Summary
During the diffusion welding process of the homogenized plate, traditional graphite fixtures are difficult to effectively control the welding pressure, resulting in product fracturing, depression or poor welding, and the inability to form a confined space, resulting in the leakage of working liquid.
A diffusion welding graphite fixture is designed, including a bottom plate and a top plate. The bottom plate is equipped with a limit groove and a communication groove. The limit groove and convex gap is matched with the thickness of the temperature uniform plate after welding. A vertical stacking structure is formed by a multi-layer intermediate plate to ensure that the upper and lower covers of the temperature uniform plate are closely fitted.
The sealing and welding effect of the temperature uniform plate are improved, welding problems caused by excessive or too small pressure are avoided, and the output of diffusion welding and the utilization rate of space in the furnace are increased.
Smart Images
Figure CN223160206U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat pipe processing and manufacturing, in particular to a diffusion welding graphite fixture. Background Art
[0002] Diffusion welding is a type of pressure welding. It refers to the process in which, under the action of high temperature and pressure on the mutually contacting surfaces, the surfaces to be joined approach each other, local plastic deformation occurs, and after a certain period of time, the atoms in the bonding layer diffuse into each other, forming a new diffusion layer at the interface, thereby forming a reliable connection of the whole.
[0003] In the manufacturing process of heat pipes, the diffusion welding method is often used to connect the upper cover plate, the lower cover plate and the supporting parts therebetween of the heat pipe. When processing the heat pipe by using diffusion welding, a corresponding fixture is needed to fix the upper cover plate and the lower cover plate of the heat pipe and apply a certain pressure thereto, and then the whole fixture is placed into a diffusion welding furnace for diffusion welding. In order to ensure that heat can be better transferred to the heat pipe and the effect of diffusion welding can be ensured, graphite materials are generally selected to manufacture the fixture.
[0004] When using the traditional diffusion welding graphite fixture for diffusion welding, the welding pressure cannot be effectively controlled. When the pressure is too large, it is easy to cause product cracking, depression, etc.; when the pressure is too small, since the upper and lower covers are not closely fitted, it is easy to cause poor welding, resulting in the heat pipe being unable to form a sealed space, and the working liquid in the heat pipe is likely to leak. Summary of the Utility Model
[0005] The purpose of the embodiments of the utility model is to provide a diffusion welding graphite fixture, which has a good welding effect for the diffusion welding of heat pipes.
[0006] To achieve the above object, the utility model adopts the following technical solutions:
[0007] Provide a diffusion welding graphite fixture, including:
[0008] A bottom plate, the length of the bottom plate extends along the X direction, the width of the bottom plate extends along the Y direction perpendicular to the X direction, and a first limiting structure is provided on one side of the bottom plate along its thickness direction. The first limiting structure includes at least one limiting groove for placing a heat pipe, and the limiting groove is opened on the bottom plate;
[0009] A top plate, a first pressing structure is provided on the side of the top plate facing the bottom plate. The first pressing structure includes at least one first limiting convex portion protruding from the top plate, and the first limiting convex portion is in one-to-one correspondence and cooperation with the limiting groove;
[0010] When the top plate is buckled on the bottom plate, the first pressing structure cooperates with the first limiting structure, and there is a gap between the first limiting protrusion and the bottom of the limiting groove, and the gap is consistent with the thickness of the heat pipe finned heat sink finished product after diffusion welding.
[0011] As a further solution of the diffusion welding graphite fixture, the first limiting structure further includes a first communication groove opened on the bottom plate, the first communication groove is used for placing a mouse tail tube connected to the heat pipe finned heat sink, the number of the limiting grooves is two, the two limiting grooves are spaced along the X direction, and the first communication groove is located between the two limiting grooves and communicates with the two limiting grooves;
[0012] The first pressing structure further includes a second limiting protrusion, the number of the first limiting protrusions is two, the two first limiting protrusions are spaced along the X direction, both ends of the second limiting protrusion along the X direction are respectively connected to one of the first limiting protrusions, the two first limiting protrusions are in one-to-one correspondence and cooperation with the two limiting grooves, and the second limiting protrusion cooperates with the first communication groove;
[0013] When the top plate is buckled on the bottom plate, there is a gap between the second limiting protrusion and the bottom of the first communication groove, and the gap is consistent with the thickness of the mouse tail tube after diffusion welding.
[0014] As a further solution of the diffusion welding graphite fixture, the gap between the first limiting protrusion and the bottom of the limiting groove is 0.03 mm - 0.05 mm, and the gap between the second limiting protrusion and the bottom of the first communication groove is 0.03 mm - 0.05 mm.
[0015] As a further solution of the diffusion welding graphite fixture, the first limiting structure further includes a blocking portion, the blocking portion is arranged at the bottom of the first communication groove, and two accommodating cavities for accommodating the mouse tail tube connected to the heat pipe finned heat sink are formed between the blocking portion and two opposite groove walls of the first communication groove; the first pressing structure further includes an avoidance groove opened on the second limiting protrusion, and the blocking portion cooperates with the avoidance groove.
[0016] As a further solution of the diffusion welding graphite fixture, the first limiting structure further includes two first accommodating grooves, one first accommodating groove is arranged at the bottom of each accommodating cavity, and the length of the first accommodating groove extends along the X direction; the first pressing structure further includes two second accommodating grooves corresponding to the first accommodating grooves one by one, the second accommodating grooves are arranged on the side of the second limiting protrusion facing the bottom plate, and the length of the second accommodating groove extends along the X direction.
[0017] As a further solution for the diffusion bonding graphite fixture, when the heat pipe is placed in the limiting groove, the tail pipe connected to the heat pipe is placed in the corresponding accommodating cavity. One end of the first accommodating groove in the accommodating cavity is flush with the end face of the blocking portion, and the other end of the first accommodating groove extends to the bottom of the limiting groove and is flush with the end face of the connection between the tail pipe and the heat pipe. Correspondingly, one end of the second accommodating groove along the X direction is aligned with one end of the avoiding groove, and the other end of the second accommodating groove along the X direction extends into one of the first limiting protrusions; the lengths of the first accommodating groove and the second accommodating groove are greater than the length of the tail pipe.
[0018] As a further solution for the diffusion bonding graphite fixture, the width of the accommodating cavity along the Y direction is greater than the width of the tail pipe.
[0019] As a further solution for the diffusion bonding graphite fixture, the projections of the two limiting grooves along the X direction partially overlap.
[0020] As a further solution for the diffusion bonding graphite fixture, the first limiting structure further includes at least one ventilation portion for communicating the inside and outside of the limiting groove, and the ventilation portion is opened on the groove wall of the limiting groove.
[0021] As a further solution for the diffusion bonding graphite fixture, it further includes a plurality of intermediate plates. The intermediate plates are located between the bottom plate and the top plate. A second pressing structure is provided on the side of the intermediate plate facing the bottom plate, and a second limiting structure is provided on the side of the intermediate plate facing the top plate. The second pressing structure is the same as the first pressing structure, and the second limiting structure is the same as the first limiting structure. The second pressing structure can cooperate with the first limiting structure, and the first pressing structure can cooperate with the second limiting structure; when there are multiple intermediate plates, among two adjacent intermediate plates, the second pressing structure of one intermediate plate can cooperate with the second limiting structure of the other intermediate plate.
[0022] Beneficial effects:
[0023] In the present utility model, after the upper and lower covers of the heat pipe are assembled, they are placed in the limiting groove. After the top plate is buckled on the bottom plate, since there is a gap between the first limiting convex part and the bottom of the limiting groove, and this gap matches the thickness of the heat pipe after welding. When the diffusion welding graphite fixture is placed in the diffusion welding furnace for diffusion welding, when the top plate is pressed down, the first limiting convex part will be in contact with the surface of the heat pipe. The thickness of the heat pipe after diffusion welding is the width of the gap between the first limiting convex part and the bottom of the limiting groove. The edge of the heat pipe is completely bonded and fixed by welding, and no gap will occur to leak the working liquid, improving the sealing performance of the heat pipe. Compared with the prior art, using the diffusion welding graphite fixture of the present utility model can effectively solve the problems of product cracking, depression, etc. caused by excessive pressure or poor welding and inability to form a closed space caused by too small pressure during the diffusion welding of the upper and lower covers of the heat pipe.
[0024] In the present utility model, by adding multiple intermediate plates between the bottom plate and the top plate, the diffusion welding graphite fixture is designed into a vertically stacked structure. Two heat pipes can be placed between every two adjacent plates for diffusion welding, effectively improving the output per furnace of the diffusion welding and the space utilization rate in the diffusion welding furnace. Description of the Drawings
[0025] The present utility model will be further described in detail below with reference to the drawings and embodiments.
[0026] Figure 1 It is a schematic structural diagram of the diffusion welding graphite fixture according to Embodiment 1 of the present utility model.
[0027] Figure 2 It is an exploded view of the diffusion welding graphite fixture according to Embodiment 1 of the present utility model from the first perspective.
[0028] Figure 3 It is Figure 2 a partial enlarged view of part A in
[0029] Figure 4 It is an exploded view of the diffusion welding graphite fixture according to Embodiment 1 of the present utility model from the second perspective.
[0030] Figure 5 It is Figure 4 a partial enlarged view of part B in
[0031] Figure 6 It is a schematic structural diagram of the diffusion welding graphite fixture according to Embodiment 2 of the present utility model.
[0032] Figure 7 It is an exploded view of the diffusion welding graphite fixture according to Embodiment 2 of the present utility model.
[0033] Figure 8This is a schematic structural diagram of the middle plate according to the second embodiment of the present utility model from the first perspective.
[0034] Figure 9 This is a schematic structural diagram of the middle plate according to the second embodiment of the present utility model from the second perspective.
[0035] Figures 1 to 9 Where:
[0036] 100, bottom plate; 110, first limiting structure; 111, limiting groove; 112, blocking portion; 113, accommodating cavity; 114, first accommodating groove; 115, ventilation portion;
[0037] 200, top plate; 210, first pressing structure; 211, first limiting convex portion; 212, second limiting convex portion; 213, avoiding groove; 214, second accommodating groove;
[0038] 300, middle plate; 310, second pressing structure; 320, second limiting structure. Specific embodiments
[0039] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present utility model will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.
[0040] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected" and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0041] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first feature and the second feature, or may also include the situation where the first feature and the second feature are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.
[0042] In the description of this embodiment, if terms such as "above", "below", "left" and "right" indicating orientation or positional relationship appear, they are all based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, if terms such as "first" and "second" appear, they are only used for distinction in description and have no special meaning.
[0043] Embodiment 1
[0044] As Figures 1 to 5 shown, this embodiment provides a diffusion welding graphite jig, which includes a bottom plate 100 and a top plate 200.
[0045] The length of the bottom plate 100 extends along the X direction, the width of the bottom plate 100 extends along the Y direction perpendicular to the X direction, and a first limiting structure 110 is provided on one side of the bottom plate 100 along its thickness direction. The first limiting structure 110 includes at least one limiting groove 111 for placing a heat dissipation plate, and the limiting groove 111 is opened on the bottom plate 100;
[0046] On the side of the top plate 200 facing the bottom plate 100, a first pressing structure 210 is provided. The first pressing structure 210 includes at least one first limiting protrusion 211 protruding from the top plate 200, and the first limiting protrusion 211 is in one-to-one correspondence and cooperation with the limiting groove 111;
[0047] When the top plate 200 is buckled on the bottom plate 100, the first pressing structure 210 cooperates with the first limiting structure 110, and there is a gap between the first limiting protrusion 211 and the bottom of the limiting groove 111, and this gap is consistent with the thickness of the heat dissipation plate finished product after diffusion welding.
[0048] In this embodiment, after the upper cover and the lower cover of the heat pipe are assembled, they can be placed in the limiting groove 111. After the top plate 200 is buckled on the bottom plate 100, since there is a gap between the first limiting protrusion 211 and the bottom of the limiting groove 111, and this gap is the same as the thickness of the heat pipe finished product after diffusion welding, when the diffusion welding graphite fixture is placed in the diffusion welding furnace for diffusion welding, when the top plate 200 is pressed down, the first limiting protrusion 211 will be in contact with the surface of the heat pipe. The thickness of the heat pipe finished product after diffusion welding is the gap between the first limiting protrusion 211 and the bottom of the limiting groove 111. The edge of the heat pipe is completely fitted and welded and fixed, without generating gap leakage of the working liquid, improving the sealing performance of the heat pipe.
[0049] Compared with the prior art, using the diffusion welding graphite fixture of this embodiment can effectively solve the problems of product cracking, depression, etc. caused by excessive pressure during diffusion welding of the upper and lower covers of the heat pipe, or poor welding and inability to form a sealed space caused by too little pressure.
[0050] Further, the first limiting structure 110 further includes a first communication groove opened on the bottom plate 100. The first communication groove is used to place the tail pipe connected to the heat pipe. The number of the limiting grooves 111 is two, and the two limiting grooves 111 are spaced along the X direction. The first communication groove is located between the two limiting grooves 111 and communicates with the two limiting grooves 111;
[0051] The first pressing structure 210 further includes a second limiting protrusion 212. The number of the first limiting protrusions 211 is two, and the two first limiting protrusions 211 are spaced along the X direction. The two ends of the second limiting protrusion 212 along the X direction are respectively connected to a first limiting protrusion 211. The two first limiting protrusions 211 are in one-to-one correspondence and cooperation with the two limiting grooves 111, and the second limiting protrusion 212 is in cooperation with the first communication groove;
[0052] When the top plate 200 is buckled on the bottom plate 100 where the heat pipe is placed, there is a gap between the second limiting protrusion 212 and the bottom of the first communication groove, and this gap is the same as the thickness of the tail pipe after diffusion welding.
[0053] In this embodiment, by designing the number of the limiting grooves 111 to be two and using the first communication groove to communicate the two limiting grooves 111, the two tail pipes respectively connected to the heat pipes in the two limiting grooves 111 can be located in the first communication groove. At the same time, there are gaps between the first limiting protrusion 211 and the bottom of the limiting groove 111 and between the second limiting protrusion 212 and the bottom of the first communication groove. During diffusion welding, when the top plate 200 is pressed down, the second limiting protrusion 212 can be in contact with the upper surfaces of the two tail pipes in the first communication groove, so that there is an appropriate pressure between the tail pipes and the bottom plate 100 and the top plate 200, and the heat pipe has a good welding effect.
[0054] Optionally, the structure of the limiting groove 111 is rectangular. Correspondingly, the structure of the first limiting protrusion 211 is also rectangular. The groove wall of the limiting groove 111 is spaced from the outer periphery of the heat pipe plate, so that the heat pipe plate has sufficient thermal expansion space during diffusion welding.
[0055] Furthermore, the gap between the first limiting protrusion 211 and the bottom of the limiting groove 111 is 0.03 mm - 0.05 mm, and the gap between the second limiting protrusion 212 and the bottom of the first communication groove is 0.03 mm - 0.05 mm.
[0056] Exemplarily, the depth of the limiting groove 111 is 5.0 mm, the thickness of the first limiting protrusion 211 is 4.35 mm, and the gap between the first limiting protrusion 211 and the bottom of the limiting groove 111 is 0.05 mm. The assembled thickness of the upper and lower plates of the heat pipe plate before diffusion welding is 0.68 - 0.7 mm; after the heat pipe plate is assembled and placed in the limiting groove 111, the top plate 200 is buckled. At this time, the first limiting protrusion 211 abuts against the heat pipe plate, and 0.05 mm is the pressing allowance of the top plate 200, that is, the pressing stroke of the top plate 200 is 0.05 mm. After pressing in place, diffusion welding is carried out. After diffusion welding, the thickness of the heat pipe plate is 0.65 mm. Using the diffusion welding graphite fixture of this embodiment can avoid problems such as cracking and depression of the heat pipe plate product caused by excessive pressure, and avoid the phenomenon of leakage holes caused by poor welding between the upper and lower covers of the heat pipe plate due to too little pressure.
[0057] Optionally, the gap between the first limiting protrusion 211 and the bottom of the limiting groove 111 includes but is not limited to 0.03 mm, 0.031 mm, 0.032 mm, 0.033 mm, 0.035 mm, 0.037 mm, 0.038 mm, 0.04 mm, 0.042 mm, 0.045 mm, 0.046 mm, 0.048 mm, 0.05 mm, etc. The gap between the second limiting protrusion 212 and the bottom of the first communication groove includes but is not limited to 0.03 mm, 0.031 mm, 0.032 mm, 0.033 mm, 0.035 mm, 0.037 mm, 0.038 mm, 0.04 mm, 0.042 mm, 0.045 mm, 0.046 mm, 0.048 mm, 0.05 mm, etc. Preferably, the gap between the first limiting protrusion 211 and the bottom of the limiting groove 111 is equal to the gap between the second limiting protrusion 212 and the bottom of the first communication groove, and the specific value depends on specifications such as the thickness of the top plate 200.
[0058] Further, the first limiting structure 110 further includes a blocking portion 112 disposed at the bottom of the first communication groove. Two accommodation cavities 113 for accommodating the tail pipes connected to the heat pipe are formed between the blocking portion 112 and two opposite groove walls of the first communication groove; the first pressing structure 210 further includes an avoidance groove 213 formed in the second limiting convex portion 212, and the blocking portion 112 cooperates with the avoidance groove 213.
[0059] In this embodiment, the first communication groove is divided into two accommodation cavities 113 by arranging the blocking portion 112, and each tail pipe is located in one accommodation cavity 113. The two tail pipes can be separated by the blocking portion 112, so as to prevent the two tail pipes from contacting and being welded together during diffusion welding, which may affect the product quality.
[0060] Further, the width of the accommodation cavity 113 in the Y direction is greater than the width of the tail pipe, so as to reserve space for the thermal expansion of the tail pipe during diffusion welding and avoid squeezing the tail pipe.
[0061] Further, the first limiting structure 110 further includes two first accommodation grooves 114. One first accommodation groove 114 is provided at the bottom of each accommodation cavity 113, and the length of the first accommodation groove 114 extends in the X direction; the first pressing structure 210 further includes two second accommodation grooves 214 corresponding to the first accommodation grooves 114 one by one. The second accommodation grooves 214 are disposed on the side of the second limiting convex portion 212 facing the bottom plate 100, and the length of the second accommodation grooves 214 extends in the X direction. There is a gap between the second limiting convex portion 212 and the bottom of the first communication groove, and the gap is consistent with the thickness of the tail pipe after diffusion welding.
[0062] As is well known, the structure of the tail pipe is a conventional structure in the art, which includes a tail body and a pipe body. The outer periphery of the pipe body is covered with the tail body, and the pipe body is welded and communicated with the heat pipe through the tail body; convex structures will be formed on both sides of the pipe body relative to the tail body in the thickness direction. In this embodiment, by providing the first accommodation groove 114 at the bottom of the accommodation cavity 113 and the second accommodation groove 214 corresponding to the first accommodation groove 114 on the side of the second limiting convex portion 212 facing the bottom plate 100, the convex structure of the tail pipe can just be located in the second accommodation groove 214 corresponding to the first accommodation groove 114. Correspondingly, the gap between the second limiting convex portion 212 and the bottom of the first communication groove is the thickness of the tail body after diffusion welding. When the top plate 200 is pressed down, the tail body can be tightly welded to ensure the connection stability between the pipe body and the heat pipe.
[0063] Furthermore, when the temperature equalizing plate is placed in the limiting groove 111, the rat tail tube connected to the temperature equalizing plate is placed in the corresponding accommodating cavity 113, and one end of the first accommodating groove 114 in the accommodating cavity 113 is flush with the end face of the blocking portion 112, and the other end of the first accommodating groove 114 extends to the bottom of the limiting groove 111 and is flush with an end face connected to the rat tail tube and the temperature equalizing plate. Correspondingly, one end of the second accommodating groove 214 along the X direction is aligned with one end of the avoidance groove 213, and the other end of the second accommodating groove 214 along its X direction extends into one of the first limiting protrusions 211; the length of the first accommodating groove 114 and the second accommodating groove 214 is greater than the length of the rat tail tube.
[0064] When the rat tail tube is placed in the accommodating cavity 113, the tube body of the rat tail tube is located in the first accommodating groove 114, one end of the tube body is adjacent to the temperature equalizing plate connected to the rat tail tube, and the other end (the end of the tube body) is located in the first accommodating groove 114 in the accommodating cavity 113 area. Since the length of the first accommodating groove 114 and the second accommodating groove 214 is greater than the length of the rat tail tube, there is a certain distance between the end of the tube body and the groove wall of the first accommodating groove 114 it faces, and this distance is the thermal expansion space of the tube body.
[0065] Furthermore, the projections of the two limiting grooves 111 along the X direction partially overlap, that is, in this embodiment, the two limiting grooves 111 are staggered along the X direction, but not completely staggered. This structural design allows the rat tail tubes corresponding to the two temperature equalizing plates to be staggered to avoid contact between the two rat tail tubes, but it is not advisable to stagger too much, so that the two rat tail tubes can be separated by the blocking portion 112, thereby making full use of the structural space of the diffusion welding graphite jig.
[0066] In this embodiment, the first limiting structure 110 also includes at least one vent 115 for connecting the inside and outside of the limiting groove 111. The vent 115 is opened on the groove wall of the limiting groove 111. During diffusion welding, the hot gas generated can be discharged in time through the vent 115.
[0067] For example, the vent 115 is a groove-shaped structure that penetrates the groove wall of the limiting groove 111, and is preferably opened at the center of the groove wall. Of course, in other embodiments, it can also be designed as a through-hole structure.
[0068] Preferably, a vent 115 is respectively provided on two opposite groove walls of the limiting groove 111 along the Y direction, and the hot air generated by the diffusion welding can be discharged from the vents 115 on both sides at the same time, providing a better exhaust effect for the diffusion welding.
[0069] Embodiment 2
[0070] In order to improve the space utilization rate in the diffusion welding furnace, Figures 6 to 9As shown, in this embodiment, a plurality of intermediate plates 300 are added between the bottom plate 100 and the top plate 200 of the above embodiment.
[0071] Exemplarily, in this embodiment, two intermediate plates 300 are added between the bottom plate 100 and the top plate 200 of the above embodiment. A second pressing structure 310 is provided on one side of the intermediate plate 300 facing the bottom plate 100, and a second limiting structure 320 is provided on one side of the intermediate plate 300 facing the top plate 200. The second pressing structure 310 is the same as the first pressing structure 210 and will not be elaborated here; the second limiting structure 320 is the same as the first limiting structure 110 and will not be elaborated here; the second pressing structure 310 can cooperate with the first limiting structure 110, and the first pressing structure 210 can cooperate with the second limiting structure 320; among two adjacent intermediate plates 300, the second pressing structure 310 of one intermediate plate 300 can cooperate with the second limiting structure 320 of the other intermediate plate 300.
[0072] In this embodiment, a plurality of intermediate plates 300 are added between the bottom plate 100 and the top plate 200, so that the diffusion bonding graphite fixture is designed into a vertically stacked structure. Two heat pipes can be placed between every two adjacent plates for diffusion bonding, effectively improving the output per furnace.
[0073] Specifically, the number of intermediate plates 300 can be determined according to the space in the diffusion welding furnace, so as to maximize the space utilization rate in the diffusion welding furnace.
[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.
Claims
1. A diffusion bonding graphite fixture, characterized in that, Comprising: A bottom plate, the length of the bottom plate extending along the X direction, the width of the bottom plate extending along the Y direction perpendicular to the X direction, a first limiting structure being provided on one side of the bottom plate along its thickness direction, the first limiting structure including at least one limiting groove for placing a heat pipe, the limiting groove being formed on the bottom plate; A top plate, a first pressing structure being provided on the side of the top plate facing the bottom plate, the first pressing structure including at least one first limiting protrusion protruding from the top plate, the first limiting protrusion corresponding to and cooperating with the limiting groove one by one; When the top plate is buckled on the bottom plate, the first pressing structure cooperates with the first limiting structure, and there is a gap between the first limiting protrusion and the bottom of the limiting groove, and the gap is consistent with the thickness of the heat pipe finished product after diffusion welding.
2. The diffusion welding graphite jig according to claim 1, characterized in that, The first limiting structure further includes a first communication groove formed on the bottom plate, the first communication groove being used for placing a tail pipe connected to the heat pipe, the number of the limiting grooves being two, the two limiting grooves being spaced along the X direction, and the first communication groove being located between the two limiting grooves and communicating with the two limiting grooves; The first pressing structure further includes a second limiting protrusion, the number of the first limiting protrusions being two, the two first limiting protrusions being spaced along the X direction, two ends of the second limiting protrusion along the X direction being respectively connected to one of the first limiting protrusions, the two first limiting protrusions corresponding to and cooperating with the two limiting grooves one by one, and the second limiting protrusion cooperating with the first communication groove; When the top plate is buckled on the bottom plate, there is a gap between the second limiting protrusion and the bottom of the first communication groove, and the gap is consistent with the thickness of the tail pipe after diffusion welding.
3. The diffusion bonding graphite fixture according to claim 2, characterized in that The gap between the first limiting protrusion and the bottom of the limiting groove is 0.03 mm - 0.05 mm, and the gap between the second limiting protrusion and the bottom of the first communication groove is 0.03 mm - 0.05 mm.
4. The diffusion welding graphite fixture according to claim 2, characterized in that, The first limiting structure further includes a blocking portion, the blocking portion being provided at the bottom of the first communication groove, and two accommodating cavities for accommodating the tail pipe connected to the heat pipe being formed between the blocking portion and two opposite groove walls of the first communication groove; the first pressing structure further includes an avoidance groove formed on the second limiting protrusion, and the blocking portion cooperates with the avoidance groove.
5. The diffusion welding graphite jig according to claim 4, characterized in that, The first limiting structure further includes two first accommodating grooves, one first accommodating groove being provided at the bottom of each accommodating cavity, the length of the first accommodating groove extending along the X direction; the first pressing structure further includes two second accommodating grooves corresponding to the first accommodating grooves one by one, the second accommodating grooves being provided on the side of the second limiting protrusion facing the bottom plate, and the length of the second accommodating groove extending along the X direction.
6. The diffusion bonding graphite fixture according to claim 5, wherein When the heat pipe is placed in the limiting groove, the tail pipe connected to the heat pipe is placed in the corresponding accommodating cavity. One end of the first accommodating groove in the accommodating cavity is flush with the end face of the blocking portion, and the other end of the first accommodating groove extends to the bottom of the limiting groove and is flush with the end face of the connection between the tail pipe and the heat pipe. Correspondingly, one end of the second accommodating groove along the X direction is aligned with one end of the avoiding groove, and the other end of the second accommodating groove along the X direction extends into one of the first limiting protrusions; the lengths of the first accommodating groove and the second accommodating groove are greater than the length of the tail pipe.
7. The diffusion bonding graphite fixture according to claim 4, wherein, The width of the accommodating cavity along the Y direction is greater than the width of the tail pipe.
8. The diffusion welding graphite jig according to claim 2, wherein, The projections of the two limiting grooves along the X direction partially overlap.
9. The diffusion bonding graphite jig according to claim 1, wherein, The first limiting structure further includes at least one ventilation portion for communicating the inside and the outside of the limiting groove, and the ventilation portion is opened on the groove wall of the limiting groove.
10. The diffusion bonding graphite jig according to any one of claims 1 to 9, characterized in that, It further includes a plurality of intermediate plates. The intermediate plates are located between the bottom plate and the top plate. A second pressing structure is provided on one side of the intermediate plate facing the bottom plate, and a second limiting structure is provided on one side of the intermediate plate facing the top plate. The second pressing structure is the same as the first pressing structure, and the second limiting structure is the same as the first limiting structure. The second pressing structure can cooperate with the first limiting structure, and the first pressing structure can cooperate with the second limiting structure; when there are multiple intermediate plates, among two adjacent intermediate plates, the second pressing structure of one intermediate plate can cooperate with the second limiting structure of the other intermediate plate.