Auxiliary welding assembly for lower cover and deep boss of vapor chamber
By using a base, cover, and restraint module in the auxiliary welding assembly between the heat spreader cover and the deep boss, the problem of deep boss deformation during diffusion welding was solved, achieving high-quality welding and efficient production.
Patent Information
- Application Number
- CN202520447775.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-13
AI Technical Summary
During the fabrication of the vapor chamber, when the diffusion welding process is used to weld the stamped lower cover and the deep boss, the high temperature and pressure can easily cause internal extrusion deformation of the deep boss, resulting in uneven capillary thickness in the internal cavity layout, which affects the thermal performance of the vapor chamber.
Design a heat spreader cover and deep boss auxiliary welding assembly, including a base, a cover body and a limiting module. The base is provided with a fixing groove and a positioning groove for positioning. The limiting module includes a solidification and expansion limiting component, which limits the deformation of the deep boss during diffusion welding and facilitates demolding after cooling.
This effectively avoids problems such as deformation of deep bosses and uneven capillary thickness in the inner cavity, improving product manufacturing quality and efficiency, and ensuring welding quality.
Smart Images
Figure CN223889135U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat spreader production technology, and in particular to an auxiliary welding assembly for a heat spreader bottom cover and a deep boss. Background Technology
[0002] Diffusion welding is a pressure welding method in which the surfaces to be welded are brought into contact under certain temperature and pressure. The physical contact between the surfaces is expanded through microscopic plastic deformation or through the trace liquid phase generated on the surfaces to be welded, and then metallurgical bonding is achieved through atomic diffusion over a relatively long period of time. In the welding process of precision structures, diffusion welding can ensure the uniform thickness of the welded plate surface, thereby ensuring the industrial performance of the plate.
[0003] As the application fields of heat exchangers become increasingly widespread, some special structural requirements necessitate higher heat exchanger boss designs. However, the depth of the boss directly stamped on the lower cover of the heat exchanger is limited by the stamping process and cannot meet the requirements. One-piece forging can meet the requirements, but the cost is very high. On the other hand, the method of combining and welding the stamped lower cover and the deep boss (forged or CNC machined) can solve the limitation of the deep boss by the stamping process, and the cost is significantly more advantageous than one-piece forging.
[0004] In the existing technology, when the stamped lower cover and the deep boss are welded using diffusion welding process, the high temperature and high pressure welding process can easily cause internal extrusion deformation of the deep boss, which in turn leads to uneven capillary thickness in the inner cavity of the deep boss, affecting the overall thermal performance of the heat spreader.
[0005] Therefore, existing technologies still need to be improved and developed. Utility Model Content
[0006] In order to solve the problem in the prior art that when the stamped lower cover and the deep boss are welded by diffusion welding process during the manufacturing process of heat spreader, the high temperature and high pressure welding process can easily cause internal extrusion deformation of the deep boss, resulting in uneven capillary thickness in the inner cavity of the deep boss, this utility model provides an auxiliary welding component for the heat spreader lower cover and the deep boss.
[0007] This utility model is achieved through the following technical solution:
[0008] A heat spreader lower cover and deep boss auxiliary welding assembly, wherein the heat spreader lower cover and deep boss auxiliary welding assembly comprises:
[0009] The base has a fixing groove recessed inward on one side, and a positioning groove recessed inward at a predetermined position within the fixing groove. The shape of the fixing groove is adapted to the shape of the stamping groove of the heat spreader cover, and the shape of the positioning groove is adapted to the deep boss.
[0010] A cover body, which is detachably fastened to one side of the base corresponding to the fixing groove;
[0011] A limiting module, the shape of which is adapted to the shape of the inner cavity of the deep boss, the limiting module comprising several separately arranged limiting components.
[0012] The heat spreader lower cover and deep boss auxiliary welding assembly, wherein the limiting module includes a plurality of solid limiting members and a plurality of expansion limiting members, wherein the thermal expansion coefficient of the expansion limiting members is greater than the thermal expansion coefficient of the solid limiting members;
[0013] Several of the expansion limiting members are detachably disposed within the combined center of the several solid limiting members.
[0014] The heat spreader lower cover and deep boss auxiliary welding assembly are provided in which the corresponding surfaces of the solid limiting member and the expansion limiting member are provided in a concave-convex fit, and the solid limiting member and the expansion limiting member are provided to slide freely along the depth direction of the positioning groove.
[0015] The corresponding surfaces of the solid limiting member and the expansion limiting member are provided with a movable gap.
[0016] The aforementioned heat spreader lower cover and deep boss auxiliary welding assembly, wherein the limiting module includes:
[0017] A first fixed member, wherein a fitting groove is provided on one side of the first fixed member, and the fitting groove is provided to extend through both sides of the first fixed member in a vertical direction;
[0018] The second fixing member is arranged in a mirror image symmetrical to the first fixing member;
[0019] An expansion member is fitted into the fitting groove of the first fixed member and the second fixed member at a predetermined distance.
[0020] The heat spreader lower cover and deep boss auxiliary welding assembly, wherein the first solid component and the second solid component are graphite components;
[0021] The expansion component is a metal component;
[0022] Furthermore, the coefficient of thermal expansion of the expansion member is higher than that of the first fixed member / second fixed member.
[0023] The heat spreader lower cover and deep boss auxiliary welding assembly are provided with combination holes on the upper sides of the first solid member, the second solid member and the expansion member. The combination holes are used to move the first solid member, the second solid member and the expansion member by means of an adapter tool.
[0024] The combined hole is a threaded hole.
[0025] The heat spreader cover and deep boss auxiliary welding assembly are provided in which a number of positioning posts are arranged around the outer edge of the fixing groove on the base, and a number of mounting holes are arranged on the cover corresponding to the positions of the positioning posts. The mounting holes are detachably sleeved and connected to the positioning posts.
[0026] The heat spreader cover and deep boss auxiliary welding assembly, wherein the depth of the fixing groove is adapted to the height of the stamping groove of the heat spreader cover;
[0027] When the cover is fastened to a predetermined position on the base, the cover and the base clamp the side of the lower cover of the heat spreader, or the side of the lower cover of the heat spreader is fitted into a groove inside the cover.
[0028] The heat spreader cover and deep boss auxiliary welding assembly are described above, wherein the depth dimension of the positioning groove is adapted to the height dimension of the deep boss, and when the deep boss and the heat spreader cover are placed in a predetermined position in the base, the upper edge of the deep boss abuts against the corresponding position of the heat spreader cover.
[0029] The heat spreader lower cover and deep boss auxiliary welding assembly are described above, wherein the base is a graphite base and the cover is a graphite cover.
[0030] The beneficial effects of this utility model are as follows: By setting a fixing groove in the base and a positioning groove at a predetermined position in the fixing groove, the heat-spreading plate cover and the deep boss to be welded can be positioned and placed respectively. By placing the limiting module into the inner cavity of the deep boss and then fastening the cover for diffusion welding, the problems of deep boss deformation and uneven capillary thickness in the inner cavity can be avoided. At the same time, since the limiting module includes several separately set limiting parts, it can be easily demolded after cooling, effectively improving product production quality and production efficiency. Attached Figure Description
[0031] Figure 1 This is a schematic diagram showing the disassembled assembly of the heat spreader lower cover and the deep boss auxiliary welding component of this utility model.
[0032] Figure 2 This is a schematic diagram of the combined state of the limiting module in the heat spreader lower cover and deep boss auxiliary welding assembly of this utility model;
[0033] Figure 3 This is a schematic diagram showing the disassembled state of the limiting module in the heat spreader lower cover and deep boss auxiliary welding assembly of this utility model.
[0034] exist Figures 1 to 3In the middle: 100, base; 110, fixing groove; 120, positioning groove; 130, positioning post; 200, cover; 210, mounting hole; 300, limiting module; 310, limiting component; 311, fixed limiting component; 312, expansion limiting component; 321, first fixed component; 322, second fixed component; 323, expansion component; 324, fitting groove; 325, combination hole; 400, heat spreader lower cover; 410, stamping groove; 500, deep boss. Detailed Implementation
[0035] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.
[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0038] In the existing technology, due to the large size of the boss structure in the special structure heat exchange plate, the stamping process alone cannot meet the requirements. Therefore, the lower cover of the heat exchange plate is stamped and then welded together with the independently manufactured deep boss. However, when the stamped lower cover and the deep boss are welded using diffusion welding, the high temperature and high pressure welding process can easily cause internal extrusion deformation of the deep boss, which in turn leads to uneven capillary thickness in the inner cavity of the deep boss, affecting the overall thermal performance of the heat exchange plate.
[0039] Based on the aforementioned problems in the prior art, this utility model provides an auxiliary welding assembly for the lower cover of the heat spreader and the deep boss, such as... Figure 1As shown, the auxiliary welding assembly for the heat spreader plate lower cover and the deep boss includes: a base 100, a fixing groove 110 recessed inward on one side of the base 100, a positioning groove 120 recessed inward at a predetermined position within the fixing groove 110, the shape of the fixing groove 110 being adapted to the shape of the stamping groove 410 of the heat spreader plate lower cover 400, and the shape of the positioning groove 120 being adapted to the shape of the deep boss 500; a cover body 200, which is detachably fastened to one side of the base 100 corresponding to the fixing groove 110; and a limiting module 300, the shape of which is adapted to the shape of the inner cavity of the deep boss 500, the limiting module 300 including several separately arranged limiting members 310.
[0040] This utility model provides a fixing groove 110 in the base 100 and a positioning groove 120 at a predetermined position in the fixing groove 110. This allows for the positioning and placement of the heat-spreading plate lower cover 400 and the deep boss 500 to be welded. By placing the limiting module 300 into the inner cavity of the deep boss 500 and then fastening the cover 200 for diffusion welding, the problems of deformation of the deep boss 500 and uneven capillary thickness in the inner cavity can be avoided. At the same time, since the limiting module 300 includes several separately arranged limiting parts 310, it can be easily demolded after cooling, effectively improving product production quality and production efficiency.
[0041] In the above embodiments, such as Figure 1 As shown, the main body of the auxiliary welding assembly for the heat spreader 400 and deep boss 500 of this utility model consists of a base 100, a cover 200, and a limiting module 300. The base 100 is the main body for placing the heat spreader 400 and the deep boss 500. To prevent inaccurate welding position correspondence during diffusion welding, in this embodiment, a fixing groove 110 is recessed inward on one side (usually the upper side) of the base 100. This fixing groove 110 is pre-set with reference to the shape of the stamped groove 410 in the heat spreader 400 during actual installation, thereby ensuring the positioning groove... The 120 can fix the stamping groove 410 after the heat spreader cover 400 is placed; correspondingly, a positioning groove 120 is also recessed inward at a predetermined position in the fixing groove 110 on the base 100. The positioning groove 120 is preset with reference to the shape of the deep boss 500 during actual setting, so that the deep boss 500 can be positioned and fixed after being placed in the positioning groove 120, and corresponds to the welding position of the heat spreader cover 400 limited by the fixing groove 110. Therefore, a precise welding effect can be achieved during the diffusion welding process.
[0042] In the above embodiments, the auxiliary welding assembly for the lower cover of the heat spreader plate and the deep boss is an auxiliary tool designed for diffusion welding processes. Diffusion welding is a precision welding method that achieves material bonding in a solid state. It expands the physical contact area by causing the surfaces of the materials to be welded to come into contact and undergo microscopic plastic deformation under certain temperature and pressure. Subsequently, during the heat preservation process, the interface atoms combine through diffusion to form a strong joint.
[0043] The aforementioned cover 200 is detachably fastened to one side of the base 100 corresponding to the fixing groove 110. In actual use, the cover 200 further limits the positioning of the heat spreader lower cover 400 and provides heat conduction and insulation during the welding process of the heat spreader lower cover 400 and the deep boss 500. Specifically, the shape and size of the cover 200 should match the cross-sectional shape and size of the side of the base 100 where the fixing groove 110 is located to achieve a precise matching installation.
[0044] The limiting module 300 is the actual component in this invention that solves the problem of deformation of the deep boss 500 during the diffusion welding process caused by high temperature and high pressure. Therefore, the overall shape of the limiting module 300 is set to match the shape of the inner cavity of the deep boss 500. In actual use, by placing the limiting module 300 in the inner cavity of the deep boss 500, combined with the principle of thermal expansion and contraction, the limiting module 300 and the action groove in the base 100 can achieve the effect of clamping the side wall of the deep boss 500, thereby limiting the amount of deformation of the deep boss 500 and effectively avoiding the problems of deformation of the deep boss 500 and uneven capillary thickness in the inner cavity. At the same time, the limiting module 300 also has the function of uniform heat conduction during the diffusion welding process, thus ensuring the welding and production quality of the product.
[0045] In this embodiment, one problem with the above-mentioned structural design is that after diffusion welding is completed, the inner wall of the deep boss 500 is tightly attached to the limiting module 300, making it difficult to demold (remove the limiting module 300 from the inner wall of the deep boss 500). Therefore, in this embodiment, the limiting module 300 is also made into several separately set limiting parts 310. After diffusion welding is completed and the lower cover of the heat spreader and the deep boss auxiliary welding assembly have cooled down, the operator can solve the problem of difficult demolding by disassembling and removing the limiting parts 310 one by one, which can effectively improve production efficiency.
[0046] In another embodiment of this utility model, to make the demolding process smoother, the limiting components 310 in the limiting module 300 are specifically divided into two types: one is a number of solid limiting components 310, which are used to directly contact the inner wall of the deep boss 500 to limit the deformation of the deep boss 500; the other is a number of expansion limiting components 310, whose coefficient of thermal expansion should be greater than that of the solid limiting components 310. Furthermore, during actual installation, the expansion limiting components 310 are detachably positioned at the center of the combination of the solid limiting components 310. The advantage of this design is that during the diffusion welding process, the expansion restraint 310 expands to a predetermined size due to heat. This predetermined size is exactly the corresponding size of the solid restraint 310 abutting against the inner wall of the deep boss 500. After the diffusion welding is completed, the expansion restraint 310 shrinks and becomes smaller, thus creating a gap with the outer solid restraint 310. At this time, the operator can easily and quickly remove the expansion restraint 310. Afterwards, because the original position of the expansion restraint 310 is empty, the operator has a large operating space to remove several solid restraints 310, thus simplifying the demolding process and greatly reducing the operating time and difficulty.
[0047] In another embodiment of this utility model, in order to facilitate the operator to identify and install the installation positions of the fixed limiting member 310 and the expansion limiting member 310, a concave-convex fitting structure is also provided on the corresponding surfaces of the fixed limiting member 310 and the expansion limiting member 310 in this embodiment, so as to form the above-mentioned limiting module 300 as a whole by splicing. It should be noted that in actual installation, the concave-convex fitting structure refers to the concave-convex fitting on the horizontal cross section, and not the concave-convex fitting on the vertical surface, so as to avoid interference with the removal process of the expansion limiting member 310. That is, the fixed limiting member 310 and the expansion limiting member 310 should be freely slidable along the depth direction of the positioning groove 120 to facilitate removal.
[0048] Based on the above embodiments, in this embodiment, since the coefficient of thermal expansion of the expansion limiting member 310 is higher than that of the solid limiting member 310, when actually setting the dimensions of the expansion limiting member 310 and the solid limiting member 310, it is not necessary to set the dimensions of their corresponding surfaces to be exactly the same. The size of the expansion limiting member 310 can be set slightly smaller, so that a movable gap is reserved at the corresponding surfaces of the solid limiting member 310 and the expansion limiting member 310. In actual use, the expansion limiting member 310 expands beyond this movable gap when heated, which enables it to abut against the solid limiting member 310, thereby limiting the shape change of the inner wall of the deep boss 500. At the same time, after the expansion limiting member 310 cools down, it can be easily removed through this movable gap, making the operation process of the operator smoother.
[0049] Based on the limitations of the solidification limiting member 310 and the expansion limiting member 310 in the above embodiments, this utility model provides a specific embodiment for reference by those skilled in the art.
[0050] like Figure 2 As shown, in this embodiment, the limiting module 300 specifically includes a first fixed member 321, a second fixed member 322, and an expansion member 323. The first fixed member 321 and the second fixed member 322 are the aforementioned fixed limiting member 310, and the expansion member 323 is the aforementioned expansion limiting member 310. These will not be described again in subsequent embodiments.
[0051] like Figure 2 As shown, a fitting groove 324 is provided on one side of the first fixed member 321. The fitting groove 324 extends vertically through both sides of the first fixed member 321, and the cross-sectional shape of the fitting groove 324 is rectangular. The second fixed member 322 is mirror-symmetrically arranged with respect to the first fixed member 321. Correspondingly, the expansion member 323 is specifically configured as a rectangular cube structure, the cross-sectional shape of which is combined with the fitting groove 324 opposite to the first fixed member 321 and the second fixed member 322 to form the hollow part horizontally. With identical cross-sectional shapes, when the expansion member 323 is fitted into the fitting groove 324 of the first fixed member 321 and the second fixed member 322, the expansion member 323 can fill the fitting groove 324. In this embodiment, the size of the expansion member 323 is slightly smaller than the corresponding size of the fitting groove 324. Therefore, during actual installation, an assembly effect can be achieved where the expansion member 323 is fitted into the fitting groove 324 of the first fixed member 321 and the second fixed member 322 at predetermined intervals, i.e., as shown... Figure 3 The structure shown.
[0052] After the assembled assembly is placed into the inner cavity of the deep boss 500, the outer wall shape of the first fixed member 321 and the second fixed member 322 is adapted to the inner cavity shape of the deep boss 500, and the shape of the expansion member 323 is adapted to the shape of the corresponding two fitting grooves 324. During the diffusion welding process, the expansion member 323, the first fixed member 321 and the second fixed member 322 expand to different degrees, thus achieving compression and limiting of the inner wall of the deep boss 500. When the diffusion welding is completed and the assembly cools down, the expansion member 323 and the fitting grooves 324 of the first fixed member 321 and the second fixed member 322 re-form a gap, so the operator can easily and quickly remove the expansion member 323, thereby providing operating space for the subsequent removal of the first fixed member 321 and the second fixed member 322.
[0053] In the above embodiments, the first solid member 321 and the second solid member 322 are preferably made of graphite material. Graphite has good thermal conductivity and can quickly conduct heat, thus providing a balanced temperature conduction effect on the deep boss 500 during diffusion welding. At the same time, graphite is chemically stable at room temperature, which can ensure that the first solid member 321 and the second solid member 322 are not prone to external shape changes after manufacturing, thereby ensuring the squeezing and limiting effect on the inner wall of the deep boss 500 and avoiding deformation of the deep boss 500 due to auxiliary tools. The expansion member 323 is made of metal material, specifically a metal material with a thermal expansion coefficient higher than that of the first solid member 321 and the second solid member 322, so as to achieve the above-mentioned effects of expansion during welding and the formation of a gap that is easy to remove during cooling.
[0054] Furthermore, in the above and below embodiments, the base 100 and the cover 200 should also be made of graphite material to achieve better heat conduction effect on the heat spreader cover 400 and the deep boss 500, and to ensure stable and uniform welding quality during the diffusion welding process.
[0055] In another possible embodiment of this utility model, to further facilitate the operator in placing or removing the first fixing member 321, the second fixing member 322, and the expansion member 323, such as... Figure 2 As shown, a combination hole 325 is provided on the upper side of the first fixed member 321, the second fixed member 322, and the expansion member 323. This combination hole 325 allows for the combination with a suitable operating tool, enabling the tool to control the movement of the first fixed member 321, the second fixed member 322, and the expansion member 323, thus avoiding direct contact between the operator and these components. In one specific embodiment, the combination hole 325 can be specifically configured as a threaded hole. In actual use, the first fixed member 321, the second fixed member 322, and the expansion member 323 can be securely connected and moved using an operating tool with a suitable thread. Furthermore, since the first fixed member 321, the second fixed member, and the expansion member 323 are fitted within the deep boss 500 and have a concave-convex mating structure, the operator can easily rotate the operating tool to separate the operating tool from the first fixed member 321, the second fixed member 322, and the expansion member 323.
[0056] In another possible embodiment of this utility model, such as Figure 1 As shown, in order to achieve accurate combination of the cover 200 and the base 100, in this embodiment, a number of positioning posts 130 are provided around the outer periphery of the base 100 corresponding to the fixing groove 110. Correspondingly, a number of mounting holes 210 are provided on the cover 200 at the locations corresponding to the positioning posts 130. The mounting holes 210 and the positioning posts 130 are detachably connected to achieve accurate corresponding installation.
[0057] In another embodiment of this utility model, the depth of the fixing groove 110 should also be adapted to the height of the stamping groove 410 of the heat spreader cover 400, so as to achieve the effect of accurately and stably fixing the heat spreader cover 400 through the stamping groove 410. After the stamping groove 410 is embedded in the fixing groove 110, the side of the heat spreader cover 400 naturally corresponds to the base 100. When the cover 200 is fastened, the cover 200 and the base 100 clamp the side of the heat spreader cover 400, thereby achieving the effect of further fixing the heat spreader cover 400.
[0058] In another embodiment, the cover 200 can be further configured such that a slot structure adapted to the side of the cover 200 is provided on one side of the base 100. When the cover 200 is fastened onto the base 100, the side of the heat spreader cover 400 is limited and accommodated by the slot. At this time, the cover 200 and the base 100 form a complete combined structure, which can further improve the heat conduction and heat preservation performance of the heat spreader cover 400 and the deep boss 500, so as to achieve a better diffusion welding effect.
[0059] In another embodiment of this utility model, the depth dimension of the positioning groove 120 should be adapted to the height dimension of the deep boss 500. When the deep boss 500 and the heat spreader cover 400 are both placed in the predetermined position within the base 100, the upper edge of the deep boss 500 abuts against the corresponding position of the heat spreader cover 400, thereby ensuring the correspondence between the upper edge of the deep boss 500 and the welding position on the heat spreader cover 400 during the diffusion welding process, and preventing incomplete welding or poor welding quality.
[0060] Based on the above embodiments, the actual usage process of the heat dissipation plate lower cover and the deep boss auxiliary welding assembly of this utility model is as follows:
[0061] like Figure 1 As shown, the operator places the deep boss 500 into the positioning groove 120 in the base 100, places the heat spreader cover 400 on the base 100, and makes the stamping groove 410 on the heat spreader cover 400 fit into the fixing groove 110 of the base 100. Then, the first solid member 321, the second solid member 322 and the expansion member 323 are placed in the inner cavity of the deep boss 500 respectively, forming a combined limiting module 300 according to the corresponding positions. Finally, the cover 200 is correspondingly fastened to the upper side of the base 100, and the above combination is placed in the diffusion welding furnace.
[0062] After welding is completed, the operator removes the cover 200 and uses tools to take out the expansion member 323, the first solid member 321 and the second solid member 322 in sequence. Finally, the welded heat spreader plate is separated from the base 100, thus completing the welding of the heat spreader cover and the deep boss 500 at this stage.
[0063] In summary, this utility model provides an auxiliary welding assembly for a heat spreader lower cover and a deep boss. Specifically, the assembly includes: a base, with a fixing groove recessed inward on one side of the base, and a positioning groove recessed inward at a predetermined position within the fixing groove. The shape of the fixing groove matches the shape of the stamping groove of the heat spreader lower cover, and the shape of the positioning groove matches the shape of the deep boss; a cover body, detachably fastened to one side of the base corresponding to the fixing groove; and a limiting module, the shape of which matches the shape of the inner cavity of the deep boss, comprising several separately arranged limiting components. This invention, by setting a fixing groove in the base and a positioning groove at a predetermined position in the fixing groove, can position and place the heat-spreading plate cover and the deep boss to be welded respectively. By placing the limiting module into the inner cavity of the deep boss and then fastening the cover for diffusion welding, the problems of deep boss deformation and uneven capillary thickness in the inner cavity can be avoided. At the same time, since the limiting module includes several separately set limiting parts, it can be easily demolded after cooling, effectively improving product production quality and production efficiency.
[0064] It should be understood that the application of this utility model is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
Claims
1. A heat spreader lower cover and deep boss auxiliary welding assembly, characterized in that, The heat spreader lower cover and deep boss auxiliary welding assembly include: The base has a fixing groove recessed inward on one side, and a positioning groove recessed inward at a predetermined position within the fixing groove. The shape of the fixing groove is adapted to the shape of the stamping groove of the heat spreader cover, and the shape of the positioning groove is adapted to the deep boss. A cover body, which is detachably fastened to one side of the base corresponding to the fixing groove; A limiting module, the shape of which is adapted to the shape of the inner cavity of the deep boss, the limiting module comprising several separately arranged limiting components.
2. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 1, characterized in that, The limiting module includes several solid limiting members and several expansion limiting members, wherein the coefficient of thermal expansion of the expansion limiting members is greater than the coefficient of thermal expansion of the solid limiting members; Several of the expansion limiting members are detachably disposed within the combined center of the several solid limiting members.
3. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 2, characterized in that, The solid limiting member and the expansion limiting member are provided with concave-convex surfaces, and the solid limiting member and the expansion limiting member are freely slidable along the depth direction of the positioning groove; The corresponding surfaces of the solid limiting member and the expansion limiting member are provided with a movable gap.
4. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 1, characterized in that, The limiting module includes: A first fixed member, wherein a fitting groove is provided on one side of the first fixed member, and the fitting groove is provided to extend through both sides of the first fixed member in a vertical direction; The second fixing member is arranged in a mirror image symmetrical to the first fixing member; An expansion member is fitted into the fitting groove of the first fixed member and the second fixed member at a predetermined distance.
5. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 4, characterized in that, The first and second fixed components are graphite components; The expansion component is a metal component; Furthermore, the coefficient of thermal expansion of the expansion member is higher than that of the first fixed member / second fixed member.
6. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 4, characterized in that, The first fixed member, the second fixed member, and the expansion member are all provided with a combination hole on their upper sides. The combination hole is used to move the first fixed member, the second fixed member, and the expansion member by means of an adapter tool. The combined hole is a threaded hole.
7. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 1, characterized in that, The base is provided with a number of positioning piles around the outer edge of the fixing groove, and the cover is provided with a number of mounting holes corresponding to the positions of the positioning piles. The mounting holes are detachably connected to the positioning piles.
8. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 7, characterized in that, The depth of the fixing groove is adapted to the height of the stamping groove of the heat spreader cover; When the cover is fastened to a predetermined position on the base, the cover and the base clamp the side of the lower cover of the heat spreader, or the side of the lower cover of the heat spreader is fitted into a groove inside the cover.
9. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 7, characterized in that, The depth of the positioning groove is adapted to the height of the deep boss. When the deep boss and the lower cover of the heat spreader are placed in the predetermined position in the base, the upper edge of the deep boss abuts against the corresponding position of the lower cover of the heat spreader.
10. The heat spreader lower cover and deep boss auxiliary welding assembly according to claim 1, characterized in that, The base is a graphite base, and the cover is a graphite cover.