CN111745315A - Apparatus for filling heat-dissipating stud and method of manufacturing heat-dissipating member - Google Patents
Apparatus for filling heat-dissipating stud and method of manufacturing heat-dissipating member Download PDFInfo
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- CN111745315A CN111745315A CN201910252203.2A CN201910252203A CN111745315A CN 111745315 A CN111745315 A CN 111745315A CN 201910252203 A CN201910252203 A CN 201910252203A CN 111745315 A CN111745315 A CN 111745315A
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- heat dissipation
- heat
- jig
- dissipating
- welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Abstract
The present disclosure relates to an apparatus for loading a heat-dissipating stud and a method of preparing a heat-dissipating component, the apparatus comprising: base (1), rotationally install workstation (4) on base (1), workstation (4) include storage area (6) and detachable blanking tool (5), blanking tool (5) with storage area (4) link to each other, blanking tool (5) have heat dissipation post hole (16), be connected with on base (1) and be used for the drive workstation (4) pivoted drive arrangement (2). The equipment disclosed by the invention can realize the quick filling of a large number of radiating columns, can integrally remove the plating layer on the end surface of the radiating column under the condition of not deviating from a jig after filling, and finally still quickly transfers the whole to a welding jig for welding by taking the whole as a unit, thereby realizing the efficient batch production of radiating elements.
Description
Technical Field
The present disclosure relates to an apparatus for packing heat-dissipating studs and a method of preparing a heat-dissipating component.
Background
When a heat dissipation plate with heat dissipation posts is manufactured, generally, a plating layer of the heat dissipation posts is firstly removed, and then the metal material is exposed and then welded with a heat dissipation substrate. In order to remove the coating on the surface of the heat-dissipating column, the prior art arranges the heat-dissipating columns in a straight line, polishes one end surface of the heat-dissipating column by using a numerical control machine, fills one end of the heat-dissipating column, on which the coating is removed, into a hole on a welding jig one by one towards a welding flux by a manual placing method, and then integrally places the heat-dissipating column into welding equipment for welding. The number of the heat dissipation columns on a common heat dissipation substrate is between 350 and 1100, and the method for independently polishing and independently filling the heat dissipation columns in the prior art is very low in efficiency and cannot meet the efficiency requirement of product batch production.
Disclosure of Invention
An object of the present disclosure is to provide an apparatus for filling heat-dissipating studs and a method of preparing a heat-dissipating member, which enable mass production of heat-dissipating plates having heat-dissipating studs.
To achieve the above object, a first aspect of the present disclosure: an apparatus for packing a heat-dissipating stud is provided, the apparatus comprising: the base, rotationally install workstation on the base, the workstation includes storage area and detachable blanking tool, the blanking tool with the storage area links to each other, the blanking tool has the heat dissipation post hole, be connected with on the base and be used for the drive workstation pivoted drive arrangement to make this equipment have:
waiting for the station, the vertical height of the material storage area is lower than the blanking jig so that the heat dissipation column is located in the material storage area, and
and the vertical height of the material storage area is higher than that of the blanking jig, so that the heat dissipation column falls into the heat dissipation column hole of the blanking jig.
Optionally, a vibration body is arranged at the lower part of the workbench and used for driving the workbench to vibrate.
Optionally, the number of the vibrators is multiple, and the vibration directions of the vibrators (8) are arranged at an angle.
Optionally, the number of the heat dissipation column holes is multiple, and the heat dissipation column holes are blind holes with openings gradually reduced from top to bottom.
Optionally, the height of the axis of the heat-dissipating stud is greater than the diameter of the heat-dissipating stud, the depth of the heat-dissipating stud hole is less than 1/2 of the height of the axis of the heat-dissipating stud and greater than the height of the axis of the heat-dissipating stud, and the distance between the centers of the adjacent heat-dissipating stud holes is not less than 1/2 of the height of the axis of the heat-dissipating stud.
Optionally, the driving device is an air cylinder, one end of the workbench is mounted on the base through a first rotating shaft, and the other end of the workbench is connected with a piston rod of the air cylinder.
In a second aspect of the present disclosure: there is provided a method of preparing a heat-dissipating component using an apparatus according to the first aspect of the present disclosure, the method comprising the steps of:
a. enabling the equipment to be located at the waiting station, and placing the heat dissipation column with the coating on the outer surface in a material storage area of the equipment;
b. the workbench is driven to rotate through the driving device, so that the equipment is positioned at the filling station, and the heat dissipation column with the coating on the outer surface falls into the heat dissipation column hole of the blanking jig;
c. taking out the blanking jig filled with the heat dissipation column with the plated outer surface, and removing the plated layer on the upper surface of the heat dissipation column with the plated outer surface in a filling state;
d. and welding the heat dissipation column with the upper surface coating removed with the heat dissipation substrate through the soldering lug.
Optionally, the method further comprises: and c, removing the coating on the upper surface of the heat dissipation column with the coating on the outer surface, and then carrying out chemical cleaning treatment and chemical protection treatment on the upper surface.
Optionally, the chemical cleaning process comprises: the chemical cleaning treatment comprises: and ultrasonically cleaning the upper surface for 10-20 min by adopting an alkaline chemical cleaning agent at the temperature of 70-90 ℃, then washing by using clear water, and then cleaning the upper surface for 1-10 min by using an acid solution.
Optionally, the chemical protection treatment comprises: and (3) contacting the upper surface subjected to chemical cleaning treatment with a metal protective agent at the temperature of 20-30 ℃ for 2-5 min, then washing with clear water, and drying at the temperature of 50-60 ℃.
Optionally, the method comprises: and d, stacking a welding jig with a through hole on a blanking jig filled with the heat dissipation column with the upper surface coating removed, aligning the through hole with the heat dissipation column hole of the blanking jig, then sequentially placing a soldering lug and a heat dissipation substrate on the welding jig to obtain a jig assembly, turning the jig assembly up and down, taking down the heat dissipation column with the upper surface coating removed after the heat dissipation column falls into the through hole, obtaining the welding assembly, and then welding.
Optionally, the method further comprises: and d, reducing the vacuum degree in the welding equipment to be less than 10pa before the welding.
Optionally, the method further comprises: in the step d, the welding is carried out in the presence of protective gas, and the dosage of the protective gas enables the pressure in the welding equipment to be 50-80 Kpa; the protective gas is nitrogen, argon or helium.
Through the technical scheme, the equipment disclosed can realize the quick loading of a large amount of heat dissipation posts to can wholly get rid of the cladding material of heat dissipation post terminal surface under the condition that does not deviate from the tool after loading, still weld in transferring to the welding tool fast at last as the unit with whole, realized radiating element's high-efficient batch production.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 to 3 are schematic structural views of an embodiment of the apparatus for packing a heat-dissipating stud according to the present disclosure. Wherein fig. 1 is the apparatus at a waiting station, fig. 2 is the apparatus at a filling station, and fig. 3 is a schematic view of the return-to-waiting station after completion of filling.
Fig. 4 is a schematic diagram illustrating a state after the blanking jig is removed in step c in the method for manufacturing a heat dissipation element according to the present disclosure.
Fig. 5 is a schematic view of a state in which the plating layer on the upper surface of the heat-dissipating stud is removed in the loaded state in step c in the method of manufacturing a heat-dissipating component of the present disclosure.
Fig. 6 is a schematic view of the jig assembly obtained in step d in the method for manufacturing a heat dissipation device according to the present disclosure.
Fig. 7 is a schematic view of the state of the welded assembly obtained in step d in the method for manufacturing a heat dissipating element according to the present disclosure.
Description of the reference numerals
1 base 2 drive device
3 piston rod 4 work bench
5 blanking jig 6 storage area
7 first rotating shaft 8 vibrator
9 the second rotating shaft 10 has a plated heat dissipation column
11 heat dissipation post 12 welding jig after upper surface coating is got rid of
13 soldering lug 14 heat dissipation substrate
15 welding assembly 16 heat radiation column hole
17 through hole
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, where not otherwise stated, use of directional words such as "upper and lower" generally refers to upper and lower in the normal operating or use condition of the device or accessory, with "inner and outer" being in reference to the profile of the structure itself.
The first aspect of the disclosure: an apparatus for packing a heat-dissipating stud is provided, with reference to fig. 1 to 3. The apparatus comprises: base 1, rotationally install workstation 4 on the base 1, workstation 4 includes storage area 6 and detachable blanking tool 5, blanking tool 5 with storage area 6 links to each other, blanking tool 5 has the heat dissipation post hole 16 that is used for loading the heat dissipation post, be connected with on the base 1 and be used for the drive workstation 4 pivoted drive arrangement 2 to make this equipment have:
waiting for the station, the vertical height of the material storage area 6 is lower than that of the blanking jig 5, so that the heat dissipation column is positioned in the material storage area 6, and
and a filling station, wherein the vertical height of the material storage area 6 is higher than that of the blanking jig 5, so that the heat dissipation column falls into the heat dissipation column hole 16 of the blanking jig 5.
The equipment disclosed by the invention can be used for quickly filling a large number of heat dissipation columns into the blanking jig.
According to the present disclosure, in order to further improve the loading efficiency, in one embodiment, a vibrator 8 may be further disposed at a lower portion of the worktable 4 to drive the worktable 4 to vibrate. Thus, under the filling station, the vibration body 8 is started, and the heat dissipation column can more easily fall into the heat dissipation column hole 16 of the blanking jig 5 under the vibration effect. The vibrator 8 may be a conventional device capable of achieving the above-mentioned object.
Further, the number of the vibration bodies 8 may be one or more, and preferably, a plurality of vibration bodies are provided to enhance the vibration effect. In a preferred embodiment of the present disclosure, the number of the vibrators 8 is 2, and at this time, the vibration directions of the 2 vibrators 8 are perpendicular, for example, one vibrator may vibrate in the vertical direction, and the other vibrator vibrates in the horizontal direction, so that the heat dissipation column can fall into the heat dissipation column hole more quickly and accurately under the dual vibration effect. In other alternative embodiments of the present disclosure, the number of the vibrators 8 may also be 3 or more, the vibration directions of the 3 or more vibrators 8 may be arranged in multi-direction and at an angle, but in order to avoid that the vibration amplitude is too large and the heat dissipation columns are difficult to fill, the number of the vibrators 8 is preferably not more than 4.
According to this disclosure, for high-efficient a large amount of heat dissipation posts of loading, the quantity in heat dissipation post hole 16 can be a plurality of, heat dissipation post hole 16 can be the blind hole of opening from top to bottom convergent, can make things convenient for the heat dissipation post to fall into like this. Under the preferred condition, the axis height of heat dissipation post is greater than the diameter of heat dissipation post, the degree of depth in heat dissipation post hole can be less than the axis height of heat dissipation post and be greater than 1/2 of heat dissipation post axis height, it is adjacent the hole heart interval in heat dissipation post hole can be not less than 1/2 of heat dissipation post axis height, wherein the hole heart interval in adjacent heat dissipation post hole indicates the interval at two adjacent heat dissipation post hole bottom surface centers, like this, can both make things convenient for the heat dissipation post to fall into in the heat dissipation post hole 16, avoid it to fall into again and popped out after again. The specific number and position of the heat-dissipating column holes 16 are not particularly limited, and may be adjusted according to the design requirement of the prepared heat-dissipating component, for example, the number of the heat-dissipating column holes 16 may be 350 to 1100, and the heat-dissipating column holes are uniformly distributed on the blanking jig 5.
The driving means 2 may be devices known to those skilled in the art according to the present disclosure, provided that it is sufficient to have the above-mentioned waiting and filling stations for the apparatus. In a specific embodiment of the present disclosure, the driving device 2 may be an air cylinder, the air cylinder is connected to the base 1 through a second rotating shaft, one end of the worktable 4 is installed on the base 1 through a first rotating shaft 7, and the other end is connected to the piston rod 3 of the air cylinder.
The method of using the apparatus shown in fig. 1 to 3 will be described below as an example. In fig. 1, the driving device 2 is a cylinder, the cylinder is installed on the base 1 through a second rotating shaft 9, one end of the workbench 4 is rotatably installed on the base 1 through a first rotating shaft 7, the other end of the workbench is connected with the piston rod 3 of the cylinder, a vibration body 8 is arranged on the lower portion of the workbench, a material storage area 6 and a blanking jig 5 are arranged on the workbench 4, and the material storage area 6 is communicated with the blanking jig 5. Firstly, at a waiting station as shown in fig. 1, a heat dissipation column is placed in the left material storage area 6 on the workbench 4, at this time, the piston rod 3 is in an extended state, and the vertical height of the right blanking jig 5 is higher than that of the material storage area 6. Then, the air cylinder is ventilated, the piston rod 3 is retracted, the workbench 4 rotates downwards around the rotating shaft 7 to form a filling station, as shown in fig. 2, the vertical height of the material storage area 6 is higher than that of the blanking jig 5, and the heat dissipation column located in the material storage area 6 rolls towards the blanking jig 5 under the action of gravity. Meanwhile, the power supply of the vibration body 8 is switched on, when the heat dissipation columns roll to the upper side of the blanking jig 5, the heat dissipation columns lose weight and fall into the heat dissipation column holes 16 of the blanking jig 5 under the action of the vibration body 8, and redundant heat dissipation columns stay above the blanking jig 5. After the heat dissipation column is fully filled in the heat dissipation column hole 16 of the blanking jig 5, air is introduced to the other direction of the air cylinder, so that the piston rod 3 extends out, the workbench 4 rotates upwards around the rotating shaft 7, and the vertical height of the workbench returning to the material storage area 6 is lower than the waiting station of the blanking jig 5, as shown in fig. 3. The heat dissipation column staying above the blanking jig 5 rolls to the left under the action of gravity and returns to the material storage area 6, and the heat dissipation column falling into the blanking jig 5 stays in the heat dissipation column hole 16 of the blanking jig 5, so as to complete the filling process.
In a second aspect of the present disclosure: there is provided a method of preparing a heat-dissipating component using an apparatus according to the first aspect of the present disclosure, the method comprising the steps of:
a. the equipment is positioned at the waiting station, and the heat dissipation column 10 with the coating on the outer surface is arranged in the material storage area 6 of the equipment;
b. the workbench 4 is driven to rotate by the driving device 2, so that the equipment is positioned at the filling station, and the heat dissipation column 10 with a coating on the outer surface falls into a heat dissipation column hole 16 of the blanking jig 5;
c. taking out the blanking jig 5 filled with the heat dissipation column 10 with the plated outer surface, and removing the plated layer on the upper surface of the heat dissipation column 10 with the plated outer surface in a filling state;
d. the heat radiation posts 11 with the upper surface plating removed are soldered to the heat radiation substrate 14 by soldering tabs 13.
After a large number of heat dissipation columns are quickly loaded through the equipment disclosed by the invention, the plating layer on the end face of each heat dissipation column can be integrally removed under the condition that the heat dissipation columns do not depart from a blanking jig, and finally, the heat dissipation columns and the heat dissipation substrate are welded by taking the whole body as a unit, so that the efficient batch production of the heat dissipation elements is realized.
In step a, the plated heat-dissipating stud 10 means that all outer surfaces (i.e., upper, lower, and side surfaces) of the heat-dissipating stud have a plating layer according to the present disclosure. The operations of step a and step b may be referred to the above description.
According to the disclosure, in the step c, referring to fig. 4, the state diagram after the blanking jig is taken out is shown, at this time, the upper surface of the heat dissipation column is exposed, so that the plating layer on the upper surface of the heat dissipation column can be removed integrally in the filling state, and referring to fig. 5, the state diagram after the plating layer is removed is shown. The method for removing the coating can be conventional in the art, and the coating can be removed by sanding, grinding by a numerically controlled lathe, laser engraving, or the like.
According to the present disclosure, after removing the plating layer on the upper surface of the heat-dissipating stud 10 having the plating layer on the outer surface thereof, in order to prevent the upper surface from being oxidized and thus reduce the bonding force with the heat-dissipating substrate, the upper surface may be subjected to an anti-oxidation treatment before soldering. Thus, in one embodiment of the present disclosure, the method may further comprise: in the step c, after the coating on the upper surface of the heat dissipation column 10 with the coating on the outer surface is removed, the upper surface is subjected to chemical cleaning treatment and chemical protection treatment, and the heat dissipation column does not fall off the falling jig 5 in the chemical cleaning treatment and the chemical protection treatment. The chemical cleaning treatment and the chemical protection treatment may be any processes capable of achieving the above-described object.
Further, the chemical cleaning process may include: and ultrasonically cleaning the upper surface for 10-20 min by adopting an alkaline chemical cleaning agent at the temperature of 70-90 ℃, then washing by using clear water, and then cleaning the upper surface for 1-10 min by using an acid solution.
Further, the alkaline chemical cleaner may contain sodium hydroxide, sodium carbonate, sodium phosphate or sodium lauryl sulfate, or a combination of two or three thereof. Furthermore, the alkaline chemical cleaning agent can contain sodium hydroxide, sodium carbonate and sodium phosphate, wherein the concentration of the sodium hydroxide can be 14-16 g/L, the concentration of the sodium carbonate can be 18-25 g/L, and the concentration of the sodium phosphate can be 8-10 g/L. The amount of the alkaline chemical cleaning agent is not particularly limited and may be adjusted according to the size of the upper surface.
Further, the acid solution may be a common inorganic acid solution, and may be, for example, a sulfuric acid solution, a hydrochloric acid solution, or a citric acid solution. Further, the concentration of the acid solution may be 5 to 8% by weight. The amount of the acid solution is not particularly limited and may be adjusted according to the size of the upper surface.
Further, the chemical protection treatment may include: and (3) contacting the upper surface subjected to chemical cleaning treatment with a metal protective agent at the temperature of 20-30 ℃ for 2-5 min, then washing with clear water, and drying at the temperature of 50-60 ℃.
Further, the metal protectant may be an agent conventionally used in the art for antioxidant protection of metals. For example, when the heat-dissipating stud is a copper stud, the metal protectant may be an alcohol solution containing benzotriazole, a BCu-10 protectant, or a dimercapto benzothiazole protectant. Furthermore, the concentration of the metal protective agent can be 1-10 g/L. The amount of the metal protectant is not particularly limited and may be adjusted according to the size of the upper surface.
When the chemical cleaning treatment and the chemical protection treatment are carried out on the upper surface of the heat dissipation column, the chemical cleaning treatment and the chemical protection treatment are still carried out under the condition that the heat dissipation column is not separated from the blanking jig, so that the heat dissipation column and the heat dissipation substrate can be welded integrally in unit after the chemical cleaning treatment and the chemical protection treatment are finished, and the efficient production of the heat dissipation element is further realized.
In a specific embodiment of the present disclosure, the method may include: in the step d, the welding jig 12 with the through hole 17 is stacked on the blanking jig 5 filled with the heat dissipation column 11 with the upper surface plating removed, the through hole 17 is aligned with the heat dissipation column hole 16 of the blanking jig 5, then the soldering lug 13 and the heat dissipation substrate 14 are sequentially placed on the welding jig 12 to obtain a jig assembly, the jig assembly is turned over up and down, the heat dissipation column 11 with the upper surface plating removed falls into the through hole 17, then the blanking jig 5 is taken down to obtain a welding assembly 15, and then the welding is carried out. Referring to fig. 6, the through hole 17 of the welding jig 12 corresponds to the position of the heat-dissipating column hole 16 of the blanking jig 5, and the welding jig 12, the soldering lug 13 and the heat-dissipating substrate 14 are sequentially stacked to obtain a jig assembly. Then, the jig assembly is turned over vertically, the heat dissipation column 11 with the upper surface plating removed falls into the through hole of the welding jig 12 under the action of gravity, and the upper surface with the plating removed is attached to the soldering lug 13 downward to obtain a welded assembly 15, referring to fig. 7. Therefore, the heat dissipation column is quickly transferred to the welding jig and welded with the heat dissipation substrate in a unit of whole.
In accordance with the present disclosure, in step d, the welding may be performed in equipment conventionally used in the art for brazing. In order to further avoid the oxidation of the heat-dissipating stud and the reduction of the bonding force with the heat-dissipating substrate, the method may further include: and d, reducing the vacuum degree in the welding equipment to be less than 10pa before the welding. Further, the method may further include: in the step d, the welding is carried out in the presence of protective gas, and the dosage of the protective gas enables the pressure in the welding equipment to be 50-80 Kpa; the protective gas is nitrogen, argon or helium. The welding conditions may be selected according to the type of the bonding pad, for example, the welding conditions may include: the temperature is 240-400 ℃, and the time is 240-300 s.
The present disclosure is further illustrated by the following examples, which are merely illustrative and explanatory of the present disclosure and are not restrictive thereof.
Example 1
The heat-dissipating stud is filled using the apparatus shown in fig. 1 to 3. In fig. 1, the driving device 2 is a cylinder, the cylinder is installed on the base 1 through a second rotating shaft 9, one end of the workbench 4 is rotatably installed on the base 1 through a first rotating shaft 7, the other end of the workbench is connected with the piston rod 3 of the cylinder, 2 vibrators 8 are arranged on the lower portion of the workbench, one vibrator vibrates along the vertical direction, and the other vibrator vibrates along the horizontal direction. The workbench 4 is provided with a material storage area 6 and a blanking jig 5, and the material storage area 6 is communicated with the blanking jig 5. Blanking tool 5 has evenly distributed's 1086 heat dissipation post holes 16, and the opening in heat dissipation post hole 16 from top to bottom convergent, adopts the axis height to be 8mm, and the diameter is that the copper post that the external surface of 4.18mm has the coating loads as the heat dissipation post, and the degree of depth in heat dissipation post hole is 90% of copper post axis height, and the hole heart interval in adjacent heat dissipation post hole is 72.5% of copper post axis height.
Firstly, at a waiting station as shown in fig. 1, a copper column with a coating on the outer surface is placed in the storage area 6 on the left side of the workbench 4, at the moment, the piston rod 3 is in an extending state, and the vertical height of the blanking jig 5 on the right side is higher than that of the storage area 6. Then, the air cylinder is ventilated, the piston rod 3 is retracted, the workbench 4 rotates downwards around the rotating shaft 7 to form a filling station, as shown in fig. 2, the vertical height of the material storage area 6 is higher than that of the blanking jig 5, and the copper column located in the material storage area 6 rolls towards the blanking jig 5 under the action of gravity. Meanwhile, the power supply of the vibration body 8 is switched on, when the copper columns roll to the upper part of the blanking jig 5, the copper columns lose weight and fall into the heat dissipation column holes 16 of the blanking jig 5 under the action of the vibration body 8, and redundant copper columns stay above the blanking jig 5. After the heat dissipation column is fully filled in the heat dissipation column hole 16 of the blanking jig 5, air is introduced to the other direction of the air cylinder, so that the piston rod 3 extends out, the workbench 4 rotates upwards around the rotating shaft 7, and the vertical height of the workbench returning to the material storage area 6 is lower than the waiting station of the blanking jig 5, as shown in fig. 3. The copper column staying above the blanking jig 5 rolls to the left under the action of gravity and returns to the material storage area 6, while the copper column falling into the blanking jig 5 stays in the heat dissipation column hole 16 of the blanking jig 5, thereby completing the filling process.
Taking out the blanking jig 5 filled with the copper column with the plated layer on the outer surface, and removing the plated layer on the upper surface of the copper column by sanding in the filling state of the blanking jig 5 taken out as shown in fig. 4 to obtain the blanking jig 5 filled with the copper column with the plated layer on the upper surface removed, as shown in fig. 5.
And (2) ultrasonically cleaning the upper surface of the copper column for 15min at 80 ℃ by using an alkaline chemical cleaning agent consisting of sodium hydroxide (with the concentration of 15g/L), sodium carbonate (with the concentration of 20g/L) and sodium phosphate (with the concentration of 10g/L), then washing the upper surface of the copper column by using clean water, and then washing the upper surface of the copper column for 5min by using a 5 weight percent sulfuric acid solution to remove an oxide layer on the surface of the copper column. Then heating an ethanol solution containing benzotriazole (with the concentration of 5g/L) to 50 ℃, washing the upper surface for 5min, then washing with clear water, and drying at 60 ℃.
As shown in fig. 6, a welding jig 12 having a through hole 17 is stacked on a blanking jig 5, the through hole 17 is aligned with the heat-dissipating column hole 16 of the blanking jig 5, then a soldering lug 13 made of PbSn (5) Ag (1.5) and an aluminum silicon carbide substrate as a heat-dissipating substrate are sequentially placed on the welding jig 12 to obtain a jig assembly, the jig assembly is turned upside down, and the copper column with the upper surface plating removed falls into the through hole 17, and then the blanking jig 5 is taken down to obtain a welded assembly 15, as shown in fig. 7.
And placing the welding assembly into a welding equipment furnace, vacuumizing the welding furnace by a vacuum pump through the welding furnace, reducing the vacuum degree in the furnace to be below 10pa, simultaneously filling protective gas into the welding furnace to perform atmosphere protection on the welding assembly in the furnace, preventing the welding assembly from being oxidized, stopping filling the protective gas after the pressure of the protective gas in the welding furnace reaches 80Kpa, then performing welding at 320 ℃, and cooling and demolding after the welding is finished to obtain the target product radiating element.
Therefore, the heat dissipation columns are filled by the equipment, batch polishing is carried out on the heat dissipation columns under the condition that the heat dissipation columns are not separated from the blanking jig, chemical cleaning treatment and chemical protection treatment are further carried out in batches, and finally integral batch welding of the heat dissipation columns is completed, so that the production efficiency is greatly improved.
Example 2
The same equipment as in example 1 was used to fill the heat-dissipating studs.
After the loading is completed, the blanking jig 5 filled with the copper column with the plated layer on the outer surface is taken out, the blanking jig 5 taken out is shown in fig. 4, the plated layer on the upper surface of the copper column is removed by sanding in the loading state, and the blanking jig 5 filled with the copper column with the plated layer on the upper surface removed is obtained after the removal, as shown in fig. 5.
As shown in fig. 6, a welding jig 12 having a through hole 17 is stacked on a blanking jig 5, the through hole 17 is aligned with the heat-dissipating column hole 16 of the blanking jig 5, then a soldering lug 13 made of PbSn (5) Ag (1.5) and an aluminum silicon carbide substrate as a heat-dissipating substrate are sequentially placed on the welding jig 12 to obtain a jig assembly, the jig assembly is turned upside down, and the copper column with the upper surface plating removed falls into the through hole 17, and then the blanking jig 5 is taken down to obtain a welded assembly 15, as shown in fig. 7.
And (3) placing the welding assembly into a welding equipment furnace for welding at 320 ℃, and cooling and demoulding after welding to obtain the target product radiating element.
Therefore, the heat dissipation columns are filled by the equipment, batch polishing is carried out on the heat dissipation columns under the condition that the heat dissipation columns are not separated from the blanking jig, batch welding of the heat dissipation columns is further completed, and production efficiency is greatly improved.
Test examples
The bonding force between the copper pillars of the heat dissipation member prepared in example 1-2 and the aluminum silicon carbide substrate was tested, and the results are shown in table 1.
The binding force between the copper column and the aluminum silicon carbide substrate adopts a universal material testing machine, and according to GB/T228.1-2010, part 1 of the metal material tensile test: room temperature test method ].
TABLE 1
| Examples | Bonding force between the heat-dissipating post and the heat-dissipating substrate, N/mm2 |
| Example 1 | 20.55 |
| Example 2 | 5.74 |
As can be seen from the data in table 1, the bonding force between the heat-dissipating stud and the heat-dissipating substrate can be further improved by adding the steps of performing the batch chemical cleaning process and the chemical protection process on the heat-dissipating stud.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (13)
1. An apparatus for loading a heat-dissipating stud, the apparatus comprising: base (1), rotationally install workstation (4) on base (1), workstation (4) include storage area (6) and detachable blanking tool (5), blanking tool (5) with storage area (6) link to each other, blanking tool (5) have heat dissipation post hole (16), be connected with on base (1) and be used for the drive workstation (4) pivoted drive arrangement (2) to make this equipment have:
waiting for a station, the vertical height of the material storage area (6) being lower than the blanking jig (5) so that the heat dissipation column is located in the material storage area (6), and
and the vertical height of the material storage area (6) is higher than that of the blanking jig (5), so that the heat dissipation column falls into a heat dissipation column hole (16) of the blanking jig (5).
2. The device according to claim 1, wherein a vibrator (8) is provided at a lower portion of the table (4) for vibrating the table (4).
3. The apparatus of claim 2, wherein the number of the vibrators (8) is plural, and the vibration directions of the plurality of vibrators (8) are arranged at an angle.
4. The apparatus according to claim 1, wherein the heat-dissipating column holes (16) are plural in number, and the heat-dissipating column holes (16) are blind holes with openings tapered from top to bottom.
5. The apparatus of claim 4, wherein the heat-dissipating stud has an axial height greater than a diameter of the heat-dissipating stud, the heat-dissipating stud hole has a depth 1/2 less than the axial height of the heat-dissipating stud and greater than the axial height of the heat-dissipating stud, and the hole-to-center spacing between adjacent heat-dissipating stud holes is no less than 1/2 of the axial height of the heat-dissipating stud.
6. The apparatus according to claim 1, wherein the driving device (2) is a cylinder, one end of the working table (4) is mounted on the base (1) through a first rotating shaft (7), and the other end is connected with a piston rod (3) of the cylinder.
7. A method of manufacturing a heat-dissipating component using the apparatus of any one of claims 1 to 6, comprising the steps of:
a. the equipment is positioned at the waiting station, and a heat dissipation column (10) with a coating on the outer surface is arranged in a material storage area (6) of the equipment;
b. the workbench (4) is driven to rotate through the driving device (2), so that the equipment is positioned at the filling station, and the heat dissipation column (10) with the coating on the outer surface falls into a heat dissipation column hole (16) of the blanking jig (5);
c. taking out the blanking jig (5) filled with the heat dissipation column (10) with the plated outer surface, and removing the plated layer on the upper surface of the heat dissipation column (10) with the plated outer surface in a filling state;
d. and welding the heat dissipation column (11) with the upper surface coating removed and a heat dissipation substrate (14) through a soldering lug (13).
8. The method of claim 7, wherein the method further comprises: and in the step c, removing the coating on the upper surface of the heat dissipation column (10) with the coating on the outer surface, and then carrying out chemical cleaning treatment and chemical protection treatment on the upper surface.
9. The method of claim 8, wherein the chemical cleaning process comprises: and ultrasonically cleaning the upper surface for 10-20 min by adopting an alkaline chemical cleaning agent at the temperature of 70-90 ℃, then washing by using clear water, and then cleaning the upper surface for 1-10 min by using an acid solution.
10. The method of claim 8, wherein the chemical protection treatment comprises: and (3) contacting the upper surface subjected to chemical cleaning treatment with a metal protective agent at the temperature of 20-30 ℃ for 2-5 min, then washing with clear water, and drying at the temperature of 50-60 ℃.
11. The method of claim 7, wherein the method comprises: in the step d, a welding jig (12) with a through hole (17) is stacked on a blanking jig (5) filled with the heat dissipation column (11) with the upper surface coating removed, the through hole (17) is aligned to the heat dissipation column hole (16) of the blanking jig (5), then a soldering lug (13) and a heat dissipation substrate (14) are sequentially placed on the welding jig (12), a jig assembly is obtained, the jig assembly is turned over up and down, the heat dissipation column (11) with the upper surface coating removed falls into the through hole (17), then the blanking jig (5) is taken down, the welding assembly (15) is obtained, and then the welding is carried out.
12. The method of claim 7, wherein the method further comprises: and d, reducing the vacuum degree in the welding equipment to be less than 10pa before the welding.
13. The method of claim 7, wherein the method further comprises: in the step d, the welding is carried out in the presence of protective gas, and the dosage of the protective gas enables the pressure in the welding equipment to be 50-80 Kpa; the protective gas is nitrogen, argon or helium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910252203.2A CN111745315A (en) | 2019-03-29 | 2019-03-29 | Apparatus for filling heat-dissipating stud and method of manufacturing heat-dissipating member |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910252203.2A CN111745315A (en) | 2019-03-29 | 2019-03-29 | Apparatus for filling heat-dissipating stud and method of manufacturing heat-dissipating member |
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| CN111745315A true CN111745315A (en) | 2020-10-09 |
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