CN110014202A - A kind of samming plate welding method - Google Patents
A kind of samming plate welding method Download PDFInfo
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- CN110014202A CN110014202A CN201910369716.1A CN201910369716A CN110014202A CN 110014202 A CN110014202 A CN 110014202A CN 201910369716 A CN201910369716 A CN 201910369716A CN 110014202 A CN110014202 A CN 110014202A
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- temperature
- plate
- lower cover
- uniforming plate
- uniforming
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Classifications
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/002—Soldering by means of induction heating
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/206—Cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The present invention relates to radiator manufacturing technology fields, specifically, being a kind of welding method of temperature-uniforming plate, comprising the following steps: step 1: there is the temperature-uniforming plate upper cover plate of boss structure in preparation edge；Step 2: the temperature-uniforming plate lower cover plate of the preparation fluted structure in edge；Step 3: temperature-uniforming plate upper cover plate and temperature-uniforming plate lower cover plate are subjected to preweld cleaning；Step 4: choosing pricker powder, and pricker powder is inserted in temperature-uniforming plate lower cover plate edge and vee gutter；Step 5: upper and lower cover plates is aligned and carries out clamping using fixture and is fixed；Step 6: using the heating device of electromagnetic heating, the edge of temperature-uniforming plate upper and lower cover plates is heated；Step 7: welding edge processing and postwelding leak check are carried out to temperature-uniforming plate.The present invention improves the leakproofness of temperature-uniforming plate upper and lower cover plates engagement, effectively reduces the possibility of temperature-uniforming plate leakage.Also, application electromagnetic heating carries out local welding, and temperature-uniforming plate is not only made to reduce the possibility of deformation, also more energy saving.
Description
Technical field
The present invention relates to radiator manufacturing technology fields, specifically, being a kind of welding method of temperature-uniforming plate.
Background technique
With the rapid development of the industries such as electronics, communication, electronic component needs more efficient thermal control to meet it
Requirement to working environment.Temperature-uniforming plate is as a kind of high-performance heat transfer components, it has also become primary study object.But temperature-uniforming plate belongs to two
Dimension heat transfer, flat cavity shape make its upper and lower cover plates edge be difficult to preferably engage.Currently, being directed to temperature-uniforming plate upper and lower covers
The juncture of plate has soft soldering, hard solder, diffusion welding (DW), Laser Welding etc..Related patents are as follows:
China Patent No. [201410418065.8], open (bulletin) day 2016.02.10, Lai Yaohui is by temperature-uniforming plate upper and lower cover plates
Commissura apply solder, and give welded seal.Solder welding technique relative maturity, but the simple solder that applies be easy to cause weldering
Material filling is uneven, and welding is insufficient, and there are gap, the air-tightness of temperature-uniforming plate to be difficult to be guaranteed for postwelding.And traditional vacuum pricker
Brazier energy loss is big, not energy-efficient.
China Patent No. [201510689730.1], open (bulletin) day 2016.01.27, Sunday sea et al. is by temperature-uniforming plate
The outer rim of upper and lower cover plates is welded by the way of atmosphere protection diffusion welding (DW).Diffusion welding (DW) can reduce the problem of material breakage,
But vacuum hotpressing stove need to be used to carry out heating pressurization to entire temperature-uniforming plate, not only have the possibility for deforming temperature-uniforming plate, there is also energy
Big problem is lost in source.
China Patent No. [201610931726.6], open (bulletin) day 2018.12.18, Zhao Hangao and Li Yanxiong will be equal
The outer rim of warm plate upper and lower cover plates is welded using laser welding mode.Laser welding can be welded with automatic high-speed, precisely right
Position.But for such as some high reflectivity such as aluminium, copper and its alloy and high conductivity material, weldability meeting stimulated light is changed, and
Energy conversion rate is low, not energy-efficient.
In terms of above-mentioned existing patent, being primarily present following problems: easily there is welding not in the engagement of temperature-uniforming plate upper and lower cover plates
Sufficiently, the problem that temperature-uniforming plate easily leaks, is easily-deformable, energy loss is big, for this purpose, we have proposed a kind of samming plate welding methods to come
It solves the above problems.
Summary of the invention
It is big the purpose of the invention is to overcome existing temperature-uniforming plate to weld insufficient, easy leakage, easily-deformable, energy loss
Deficiency, and the one kind proposed can be improved samming plate tightness, reduce temperature-uniforming plate deformation, and effectively energy-efficient temperature-uniforming plate welding side
Method.
To achieve the goals above, present invention employs following technical solutions:
A kind of samming plate welding method, which comprises the following steps:
Step 1: there is the temperature-uniforming plate upper cover plate of boss structure in preparation edge；
Step 2: the temperature-uniforming plate lower cover plate of the preparation fluted structure in edge；
Step 3: temperature-uniforming plate upper cover plate and temperature-uniforming plate lower cover plate are subjected to preweld cleaning；
Step 4: choosing pricker powder, and pricker powder is inserted in temperature-uniforming plate lower cover plate edge and vee gutter；
Step 5: upper and lower cover plates is aligned and carries out clamping using fixture and is fixed；
Step 6: using the heating device of electromagnetic heating, the edge of temperature-uniforming plate upper and lower cover plates is heated；Step 7:
Welding edge processing and postwelding leak check are carried out to temperature-uniforming plate.
In the above-mentioned technical solutions, in step 1, temperature-uniforming plate upper cover plate is prepared, is cut into two triangles in its edge
Shape boss；In step 2, temperature-uniforming plate lower cover plate is prepared, carves two triangular grooves in its edge；Temperature-uniforming plate upper cover plate
Triangle boss be aligned with the triangular groove of lower cover plate and be uniformly distributed respectively at upper and lower cover plates edge；In step 7, weldering
When connecing, samming Board position is fixed, and Mobile electromagnetic heating device heats on one side to temperature-uniforming plate, after the completion of the heating on one side,
Mobile electromagnetic heating device to the lower of temperature-uniforming plate continues to heat on one side；In step 6, when electromagnetic heating, nozzle is directed at samming
Protective gas is blown at the heating position of plate, and makees synchronizing moving according to the movement of electromagnetic heater.
In the above-mentioned technical solutions, the material of temperature-uniforming plate upper and lower cover plates is aluminium or copper material.
Beneficial effects of the present invention: the present invention is different from conventional brazing method and welding powder is placed directly in temperature-uniforming plate upper and lower cover plates
On the face of weld at edge, in samming plate welding method, corresponding groove and convex is separately designed to upper and lower cover plates edge surrounding
Platform, and there are gaps to fill pricker powder, increases bonding area.Its special welding surface structure enables pricker powder effectively to fill,
The formation that can avoid welding hole after welding, effectively improves the air-tightness of temperature-uniforming plate.Also, it is different from traditional use vacuum pricker
The method that brazier is welded, only need to be to the temperature-uniforming plate upper and lower cover plates edge carry out office for being aligned compression using electromagnetic heating
Portion's welding effectively reduces the possibility of temperature-uniforming plate deformation, and the rate of heat addition is high, and electricity is converted to thermal energy rapidly, heat is effectively reduced
Loss, has saved the energy.Protective gas is blown at the heating position that nozzle is directed at temperature-uniforming plate up and down when welding, and is filled according to electromagnetic heating
Synchronizing moving is made in the movement set, and weldment is made to avoid the oxidation reaction occurred in welding.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of temperature-uniforming plate upper and lower cover plates in the present invention.
Fig. 2 is temperature-uniforming plate upper cover plate schematic diagram in the present invention.
Fig. 3 is temperature-uniforming plate lower cover plate schematic diagram in the present invention.
Fig. 4 is that electromagnetic heating welds side view in the present invention.
Fig. 5 is that electromagnetic heating welds system diagram in the present invention.
In figure, 1- temperature-uniforming plate upper cover plate, 2- temperature-uniforming plate lower cover plate, 3- temperature-uniforming plate, 4- electromagnetic heater, 5- nozzle, 11-
The groove of the boss of temperature-uniforming plate upper cover plate, 22- temperature-uniforming plate lower cover plate.
Specific embodiment
In order to deepen the understanding of the present invention, the present invention is done below in conjunction with drawings and examples and is further retouched in detail
It states, the embodiment is only for explaining the present invention, does not constitute and limits to protection scope of the present invention.
Embodiment one: above temperature-uniforming plate 1 and lower temperature-uniforming plate 2 are the cover board of long 110mm, width 110mm, thickness 1mm, surrounding
Edge is high 4mm, the boss of wide 8mm.The material of temperature-uniforming plate upper cover plate and temperature-uniforming plate lower cover plate is aluminium.
A kind of samming plate welding method, includes the following steps:
Step 1: there is the temperature-uniforming plate upper cover plate of boss structure in preparation edge；
Step 2: the temperature-uniforming plate lower cover plate of the preparation fluted structure in edge；
Step 3: temperature-uniforming plate upper cover plate and temperature-uniforming plate lower cover plate are subjected to preweld cleaning；
Step 4: choosing zinc-aluminium pricker powder, and pricker powder is inserted in temperature-uniforming plate lower cover plate edge and vee gutter；
Step 5: upper and lower cover plates is aligned and carries out clamping using fixture and is fixed；
Step 6: using the heating device of electromagnetic heating, the edge of temperature-uniforming plate upper and lower cover plates is heated；Step 7:
Welding edge processing and postwelding leak check are carried out to temperature-uniforming plate.
In above-mentioned steps, the material of temperature-uniforming plate upper cover plate 1 and lower cover plate 2 is aluminium, when preparing temperature-uniforming plate upper cover plate 1, at it
Edge is cut into two wide 2mm, the triangle boss 11 of deep 1.5mm.When preparing temperature-uniforming plate lower cover plate 2, in its surrounding
Edge carves two wide 2mm, the triangular groove 22 of deep 2mm.The triangle boss 11 of temperature-uniforming plate upper cover plate and the triangle of lower cover plate
Connected in star 22 is aligned and is uniformly distributed respectively in upper cover plate 1 and 2 edge of lower cover plate.
When using electromagnetic heating, welding current 450-550A, heating time 50-70s, 440-460 DEG C of heating temperature.Welding
When, 3 position of temperature-uniforming plate is fixed, and Mobile electromagnetic heating device 4 heats on one side to temperature-uniforming plate 3.After the completion of the heating on one side,
Mobile electromagnetic heating device 4 to the lower of temperature-uniforming plate 3 continues to heat on one side.When electromagnetic heating, nozzle 5 is directed at temperature-uniforming plate 3
Protective gas argon gas is blown at heating position, and makees synchronizing moving according to the movement of electromagnetic heater 4.
When carrying out production aluminium temperature-uniforming plate using method of the invention, firstly, aluminium temperature-uniforming plate upper cover plate 1 and lower cover plate 2 is standby
It is good, two wide 2mm, the triangle boss 11 of deep 1.5mm, in aluminium temperature-uniforming plate are cut into 1 edge of aluminium temperature-uniforming plate upper cover plate
Carve two wide 2mm, the triangular groove 22 of deep 2mm, it is desirable that the triangle of aluminium temperature-uniforming plate upper cover plate 1 is convex in 2 edge of lower cover plate
Platform 11 is aligned with the triangular groove 22 of lower cover plate 2 and is uniformly distributed respectively in upper cover plate 1 and 2 edge of lower cover plate, carefully removes
The oxide on surface of upper cover plate 1 and lower cover plate 2, grease, foul etc. clean aluminium temperature-uniforming plate upper cover plate 1 and lower cover plate 2 with acetone,
Surface grease is removed, is dried up aluminium temperature-uniforming plate upper cover plate 1 and lower cover plate 2 with compressed nitrogen.Then alcohol washes aluminium temperature-uniforming plate is used
Upper cover plate 1 and lower cover plate 2 remove surface impurity, are dried up aluminium temperature-uniforming plate upper cover plate 1 and lower cover plate 2 with compressed nitrogen.Choose zinc
Aluminium pricker powder, it is after pricker powder is equably filled out 22 in 2 edge of lower cover plate and vee gutter, upper cover plate 1 and lower cover plate 2 is right
Quasi- pressing.Boss 11 and 22 structure of groove enable to aluminium temperature-uniforming plate upper cover plate 1 and lower cover plate 2 to be easier to be aligned, operating process
In be not easy transposition.Between boss 11 and groove 22 there are gap for filling pricker powder so that pricker powder fills relatively uniform, aluminium samming
Plate surrounding can preferably avoid leaking.It recycles fixture that upper cover plate 1 and lower cover plate 2 is fixed and compresses, use electromagnetic heating
Heating device heated.Welding current 450-550A, heating time 50-70s, 440-460 DEG C of heating temperature.When welding,
3 position of aluminium temperature-uniforming plate is fixed, and Mobile electromagnetic heating device 4 heats on one side to aluminium temperature-uniforming plate 3.The heating on one side is completed
Afterwards, Mobile electromagnetic heating device 4 to the lower of aluminium temperature-uniforming plate 3 continues to heat on one side.Local heating is carried out to surrounding in this way, is made
Aluminium temperature-uniforming plate 3 is obtained to be not easy to deform in the welding process.When electromagnetic heating, guarantor is blown at the heating position that nozzle 5 is directed at aluminium temperature-uniforming plate 3
Protect gases argon, and synchronizing moving made according to the movement of electromagnetic heater 4, with prevent aluminium temperature-uniforming plate 3 in the welding process by
Oxidation.Finally, carrying out welding edge processing to the aluminium temperature-uniforming plate welded, the airtight inspection of postwelding is carried out using helium leak detector, just
The aluminium temperature-uniforming plate of available better tightness.
Embodiment two: above temperature-uniforming plate 1 and lower temperature-uniforming plate 2 are the cover board of long 120mm, width 120mm, thickness 1mm, surrounding
Edge is high 5mm, the boss of wide 10mm.The material of temperature-uniforming plate upper cover plate and temperature-uniforming plate lower cover plate is copper.
A kind of samming plate welding method, includes the following steps:
Step 1: there is the temperature-uniforming plate upper cover plate of boss structure in preparation edge；
Step 2: the temperature-uniforming plate lower cover plate of the preparation fluted structure in edge；
Step 3: temperature-uniforming plate upper cover plate and temperature-uniforming plate lower cover plate are subjected to preweld cleaning；
Step 4: choosing zinc-aluminium pricker powder, and pricker powder is inserted in temperature-uniforming plate lower cover plate edge and vee gutter；
Step 5: upper and lower cover plates is aligned and carries out clamping using fixture and is fixed；
Step 6: using the heating device of electromagnetic heating, the edge of temperature-uniforming plate upper and lower cover plates is heated；Step 7:
Welding edge processing and postwelding leak check are carried out to temperature-uniforming plate.
In above-mentioned steps, when preparing temperature-uniforming plate upper cover plate 1, two wide 2.5mm are cut into its edge, deep 2mm's
Triangle boss 11.When preparing temperature-uniforming plate lower cover plate 2, two wide 2.5mm, the triangle of deep 2.5mm are carved in its edge
Groove 22.The triangle boss 11 of temperature-uniforming plate upper cover plate be aligned with the triangular groove 22 of lower cover plate and respectively in upper cover plate 1 and
2 edge of lower cover plate is uniformly distributed.When using electromagnetic heating, welding current 500-550A, heating time 150-200s, heating temperature
670-700℃.When welding, 3 position of temperature-uniforming plate is fixed, and Mobile electromagnetic heating device 4 heats on one side to temperature-uniforming plate 3.One
After the completion of the heating on side, the lower of Mobile electromagnetic heating device 4 to temperature-uniforming plate 3 continues to heat on one side.When electromagnetic heating, nozzle
Protective gas argon gas is blown at the heating position of 5 alignment temperature-uniforming plates 3, and makees synchronizing moving according to the movement of electromagnetic heater 4.
When carrying out production copper temperature-uniforming plate using method of the invention, firstly, copper temperature-uniforming plate upper cover plate 1 and lower cover plate 2 is standby
It is good, two wide 2.5mm, the triangle boss 11 of deep 2mm, in copper temperature-uniforming plate are cut into 1 edge of copper temperature-uniforming plate upper cover plate
Carve two wide 2.5mm, the triangular groove 22 of deep 2.5mm, it is desirable that the triangle of copper temperature-uniforming plate upper cover plate 1 in 2 edge of lower cover plate
Shape boss 11 is aligned with the triangular groove 22 of lower cover plate 2 and is uniformly distributed respectively in upper cover plate 1 and 2 edge of lower cover plate.Carefully
Upper cover plate 1 and oxide on surface, grease, the foul of lower cover plate 2 etc. are removed, cleans copper temperature-uniforming plate upper cover plate 1 and lower cover with acetone
Plate 2 removes surface grease, is dried up copper temperature-uniforming plate upper cover plate 1 and lower cover plate 2 with compressed nitrogen.Then equal with alcohol washes copper
Warm plate upper cover plate 1 and lower cover plate 2 remove surface impurity, are dried up copper temperature-uniforming plate upper cover plate 1 and lower cover plate 2 with compressed nitrogen.Choosing
Silver-colored pricker powder is taken, after pricker powder is equably filled out 22 in 2 edge of lower cover plate and vee gutter, by upper cover plate 1 and lower cover plate 2
Alignment pressing.Boss 11 and 22 structure of groove enable to copper temperature-uniforming plate upper cover plate 1 and lower cover plate 2 to be easier to be aligned, operated
Transposition is not easy in journey.Between boss 11 and groove 22 there are gap for filling pricker powder so that the filling of pricker powder is relatively uniform, copper is equal
Warm plate surrounding can preferably avoid leaking.Recycle fixture that upper cover plate 1 and lower cover plate 2 is fixed and compress, using electromagnetism plus
The heating device of heat is heated.Welding current 500-550A, heating time 150-200s, 670-700 DEG C of heating temperature.Welding
When, 3 position of copper temperature-uniforming plate is fixed, and Mobile electromagnetic heating device 4 heats on one side to copper temperature-uniforming plate 3.The heating on one side is complete
Cheng Hou, the lower of Mobile electromagnetic heating device 4 to copper temperature-uniforming plate 3 continue to heat on one side.Local heating is carried out to surrounding in this way,
So that copper temperature-uniforming plate 3 is not easy to deform in the welding process.When electromagnetic heating, the heating position that nozzle 5 is directed at copper temperature-uniforming plate 3 is blown
Protective gas argon gas, and synchronizing moving is made according to the movement of electromagnetic heater 4, to prevent copper temperature-uniforming plate 3 in the welding process
It is oxidized.Finally, carrying out welding edge processing to the copper temperature-uniforming plate welded, the airtight inspection of postwelding is carried out using helium leak detector,
It can be obtained by the copper temperature-uniforming plate of better tightness.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (7)
1. a kind of samming plate welding method, which comprises the following steps:
Step 1: there is the temperature-uniforming plate upper cover plate of boss structure in preparation edge；
Step 2: the temperature-uniforming plate lower cover plate of the preparation fluted structure in edge；
Step 3: temperature-uniforming plate upper cover plate and temperature-uniforming plate lower cover plate are subjected to preweld cleaning；
Step 4: choosing pricker powder, and pricker powder is inserted in temperature-uniforming plate lower cover plate edge and vee gutter；
Step 5: upper and lower cover plates is aligned and carries out clamping using fixture and is fixed；
Step 6: using the heating device of electromagnetic heating, the edge of temperature-uniforming plate upper and lower cover plates is heated；Step 7:
Welding edge processing and postwelding leak check are carried out to temperature-uniforming plate.
2. a kind of samming plate welding method according to claim 1, it is characterised in that: in the step 1, prepare samming
Plate upper cover plate is cut into two triangle boss in its edge.
3. a kind of samming plate welding method according to claim 2, it is characterised in that: in the step 2, prepare samming
Plate lower cover plate carves two triangular grooves in its edge.
4. a kind of samming plate welding method according to claim 3, it is characterised in that: the triangle of temperature-uniforming plate upper cover plate is convex
Platform is aligned with the triangular groove of lower cover plate and is uniformly distributed respectively at upper and lower cover plates edge.
5. a kind of samming plate welding method according to claim 4, it is characterised in that: in the step 7, when welding,
Warm Board position is fixed, and Mobile electromagnetic heating device heats on one side to temperature-uniforming plate, after the completion of the heating on one side, Mobile electromagnetic
Heating device to the lower of temperature-uniforming plate continues to heat on one side.
6. a kind of samming plate welding method according to claim 5, it is characterised in that: in the step 6, electromagnetic heating
When, protective gas is blown at the heating position of nozzle alignment temperature-uniforming plate, and makees synchronizing moving according to the movement of electromagnetic heater.
7. a kind of samming plate welding method described in -6 according to claim 1, it is characterised in that: the material of temperature-uniforming plate upper and lower cover plates
For aluminium or copper material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910369716.1A CN110014202A (en) | 2019-05-06 | 2019-05-06 | A kind of samming plate welding method |
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| CN201910369716.1A CN110014202A (en) | 2019-05-06 | 2019-05-06 | A kind of samming plate welding method |
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| CN110014202A true CN110014202A (en) | 2019-07-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110785054A (en) * | 2019-10-16 | 2020-02-11 | 东莞领杰金属精密制造科技有限公司 | Punch forming method for vapor chamber |
| CN110779362A (en) * | 2019-10-16 | 2020-02-11 | 东莞领杰金属精密制造科技有限公司 | Semi-shearing forming method for vapor chamber |
| CN114770011A (en) * | 2022-06-17 | 2022-07-22 | 常州苏创自动化科技有限公司 | Cutting, forming and welding equipment for uniform temperature plate |
| WO2024016408A1 (en) * | 2022-07-21 | 2024-01-25 | 瑞泰精密科技(沭阳)有限公司 | Vapor chamber cavity sealing process and vapor chamber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110785054A (en) * | 2019-10-16 | 2020-02-11 | 东莞领杰金属精密制造科技有限公司 | Punch forming method for vapor chamber |
| CN110779362A (en) * | 2019-10-16 | 2020-02-11 | 东莞领杰金属精密制造科技有限公司 | Semi-shearing forming method for vapor chamber |
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| CN114770011A (en) * | 2022-06-17 | 2022-07-22 | 常州苏创自动化科技有限公司 | Cutting, forming and welding equipment for uniform temperature plate |
| WO2024016408A1 (en) * | 2022-07-21 | 2024-01-25 | 瑞泰精密科技(沭阳)有限公司 | Vapor chamber cavity sealing process and vapor chamber |
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Application publication date: 20190716 |