CN100491058C - Air cold plate sealing forming technology of aluminum alloy - Google Patents
Air cold plate sealing forming technology of aluminum alloy Download PDFInfo
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- CN100491058C CN100491058C CN 200710019462 CN200710019462A CN100491058C CN 100491058 C CN100491058 C CN 100491058C CN 200710019462 CN200710019462 CN 200710019462 CN 200710019462 A CN200710019462 A CN 200710019462A CN 100491058 C CN100491058 C CN 100491058C
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- freezing
- cold drawing
- aluminum alloy
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Abstract
A aluminum alloy air-cooled freezing-plate sealing shaping process includes the following steps: 1. processing the appearance of freezing-plate, dissipating heat fins and cover plate parts according to structure design, the structure design of freezing-plate is flush type cavity structure, the two ends of freezing-plate shell is equipped with 2-3 soldering fabrication holes with diameter of 2-3mm; 2. welding the dissipating heat fins and freezing-plate shell, cover plate through the soldering method in nitrogen protection furnace; 3. milling out printed circuit board slots on the freezing-plate shell; welding the cover plate and shell vertical soldering seam through stirring friction welding; 5. mechanical processing the appearance and two end ventilators of freezing-plate according to the drawings requirements, processing the soldering fabrication holes into two end ventilators. The aluminum alloy freezing-plate using the art method of combination of soldering and stirring friction welding in the invention increases the resistant finely processed capacity of brazing seam surface, ensures the hermeticity requirement after finely process aluminum alloy freezing-plate and increases the welding yield rate of electronic structure cabinet.
Description
Technical field
The present invention relates to the making of electronic equipment chassis aluminium alloy air cold plate.
Background technology
The cabinet that is widely used in each class of electronic devices of sea, land and sky is to accept the intraware heat and heat is exported to the accurate labyrinth of surrounding environment, and cabinet is the heat radiation requirement that realizes internal structure by the cold wind that imports certain pressure.In order to prevent that moist cooling air from condensation occurring under the working environment of temperature, damp and hot alternation, influence cabinet inner electronic equipment operate as normal, cabinet must adopt the all-metal Seal Design, and general radar requires to keep airtight 3.5Kpa not have leakage with cabinet air channel and attachment weld place.
The geometry of cabinet mostly is flat cuboid, and general cabinet is by preceding frame, left side plate, in form every cold drawing and after-frame, present cabinet, adopt more air-cooled airtight cold drawing as box side to improve the cabinet overall structure coefficient of heat transfer.As Fig. 1 is the aluminium alloy Air cooler box structure of a typical structure, the left and right side plate of this cabinet wherein, and two blocks of middle plates all are respectively by the aluminium alloy heat dissipation cold plate that includes fin.In order to realize the accurate location of printed circuit board (PCB) slot on the aluminium alloy cold drawing, cold drawing must be through accurate machining behind welding forming.In order to guarantee the accuracy of manufacture of casing structure, must carry out multiple welding.As shown in Figure 2, after the cold drawing soldering, must carry out the machining of cold drawing profile and slot, guarantee that cold drawing appearance and size and cold drawing insert the soldering fit-up gap of side plate, in this process issuable problem be originally for the cold drawing surface on plane in order to process the alternate printed circuit board (PCB) slot of convex-concave, the part weld seam causes cold drawing after by machined, and local weld seam is processed mills away, thereby makes the sealing variation of cold drawing.Through processing after cold drawing with cabinet side board assembling and soldering all-in-one-piece welding process in, because the aluminum current soldering lacks function admirable and possesses the cored solder of different temperatures gradient, the cabinet assembling and soldering can only adopt scolder and the welding procedure identical with the cold drawing soldering, therefore same soldering processes and heating-up temperature have caused the cold drawing remelting and the leakage of soldered seam for the first time, therefore the casing structure sealing can not be effectively guaranteed, leak rate is high, can only carry out postwelding glue at present and mend leak stopping.
By aluminium alloy casing structure characteristics as can be known, welding procedure is the key link in the aluminium alloy cold drawing manufacture process.At present both at home and abroad more adopt vacuum brazings and gas shield method for welding realize being connected of cold drawing [referring to Song Jun, the process technology research of phased-array radar cold drawing. electric mechanical engineering 2002.Vol8.No.3; Yu Honghua, the soldering tech application in electronic product. electric mechanical engineering 2003Vol19.No.3], soldering processes can be produced by batch, the production efficiency height, but soldering exist strength of joint lower, to the shortcoming of part processing assembling, cleaning requirement strictness.Simultaneously solder joint compactness is poor, needs the cold drawing of Surface Machining for postwelding, weld seam processing back takes place easily leak, and product rejection rate is very high.Although adopt vacuum brazing technique that cold drawing weld seam compactness is made moderate progress at present, but vacuum brazing cold drawing structure can only adopt LF21 rustproof aluminum alloy material at present, strength of joint low (only 100Mpa), the lower situation of vacuum brazing process complicated production efficient still exists simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of good airproof performance, make simpler, the air cold plate sealing forming technology of aluminum alloy that yield rate is high.
A kind of air cold plate sealing forming technology of aluminum alloy, it may further comprise the steps:
Step 1. is carried out the sharp processing of cold drawing housing, radiating fin, coverplate parts by structural design, and the structural design of cold drawing is embedded cavity body structure, respectively offers 2-3 in the soldering processes hole of Φ 2-3mm at cold drawing housing two ends;
Step 4. adopts the friction stir welding welding with cover plate and housing vertical weld;
Step 5. is carried out the machining of cold drawing profile and two ends ventilating opening by drawing, and the two ends ventilating opening is processed in the soldering processes hole.
Above-mentioned air cold plate sealing forming technology of aluminum alloy, the structural design of described cold drawing is embedded cavity body structure, cover plate and housing fit clearance are 0.10-0.20mm, guarantee the location of constraint certainly of cover plate in welding process and substrate, overlap joint step width W and weld seam depth of weld H are not less than 3mm all the time.
Above-mentioned air cold plate sealing forming technology of aluminum alloy, soldering processes hole in the described step 1 and weld seam H lower end have the plate distance more than 3 millimeters, subside to prevent to cause in stir friction welding process to weld.
Above-mentioned air cold plate sealing forming technology of aluminum alloy, aluminium-silicon eutectic solder is adopted in soldering in the described step 2, cooperates the QF brazing flux to carry out.
Above-mentioned air cold plate sealing forming technology of aluminum alloy, in the described step 3, agitating friction is welded under 350～480 ℃, 1.0-1.2 tons pressure and carries out.
The aluminium alloy cold drawing structural strength of original single soldering processes welding is low, weld seam compactness is poor, especially for the cabinet of need secondary welding, because secondary welding is all used soldering, cause weld seam remelting and leakage easily, the cold drawing structure is leaked the scrappage height, adopts soldering to improve the ability of the anti-deep processing of face of weld in conjunction with the aluminium alloy cold drawing of the process welding of friction stir welding, guarantee the sealing requirements after the deep processing of aluminium alloy cold drawing, improved the solder yield of electronic structure cabinet.
Description of drawings
Fig. 1 is the structural representation of aluminium alloy air cold plate;
Fig. 2 is the three-view diagram of aluminium alloy air cold plate.
In the accompanying drawing: 1 is housing; 2 is cover plate; 3 is radiating fin; 4 is fabrication hole.
The specific embodiment
Embodiment 1: the aluminium alloy air cold plate
Cold drawing appearance and size: 367mm * 183mm * 22mm
Procedure of processing
1. digital control processing cold drawing housing:
Clamping blank aluminium sheet 373mm * 216mm * 25mm
1. carry out cold drawing housing blank sharp processing 367mm * 183mm * 22mm by structural design, mill six, to size 367mm * 183mm * 22mm,
2. mill 247 at cold drawing housing center
-0.15 -0.05* 140
-0.15 -0.05Wide 4mm step is milled in chamber, * 13mm side then all around, guarantees upper slot 255 ,+
0.05 + 05* 148+
0.05+
015* 4mm,
3. respectively offer 3 in the soldering processes hole of Φ 2-3mm at cold drawing housing two ends;
2. cover plate is processed in digital control processing:
Clamping blank aluminium sheet 263mm * 156mm * 4mm
1. mill the four sides, to size 255
-0.15 -0.05* 148
-0.15 -0.05,
2. four jiaos of R3 are repaiied in deburring;
3. radiating fin: 247 * 140 * 9mm;
4. radiating fin and cold drawing housing, cover plate soldering welding
Radiating fin and cold drawing housing, cover plate are welded with nitrogen protection furnace brazing process,
Solder: ≠ 0.05mmAl-Si eutectic solder
Brazing flux: QF brazing flux
Welding temperature is 605 ± 5 ℃;
5. cold drawing housing and cover plate agitating friction welding
Adopt 4 millimeters stirring-heads of Φ
Rotating speed: 1000 rev/mins,
Pressure: 1.0 tons,
Welding pace: 100mm/min;
6. carry out the machining of cold drawing profile and two ends ventilating opening by design drawing, two ends are processed in the soldering processes hole
Ventilating opening is promptly made the aluminium alloy air cold plate.
Embodiment 2: the aluminium alloy air cold plate
Cold drawing appearance and size: 367mm * 183mm * 22mm
Procedure of processing
1. digital control processing cold drawing housing:
Clamping blank aluminium sheet 373mm * 216mm * 25mm
1. carry out cold drawing housing blank sharp processing 367mm * 183mm * 22mm by structural design, mill six. to size 367mm * 183mm * 22mm,
2. mill 247 at cold drawing housing center
-0.15 -0.05* 140
-0.15 -0.05Wide 4mm step is milled in chamber, * 13mm side then all around, guarantees upper slot 255+
0.05 + 015* 148+
0.05 + 005* 4mm,
3. respectively offer 3 in the soldering processes hole of Φ 2-3mm at cold drawing housing two ends;
2. cover plate is processed in digital control processing:
Clamping blank aluminium sheet 263mm * 156mm * 4mm
1. mill the four sides, to size 255
-0.15 -0.05* 148
-0.15 -0.05,
2. four jiaos of R3 are repaiied in deburring;
3. radiating fin: 247 * 140 * 9mm;
4. radiating fin and cold drawing housing, cover plate soldering welding
Radiating fin and cold drawing housing, cover plate are welded with nitrogen protection furnace brazing process,
Solder: ≠ 0.05mm Al-Si eutectic solder,
Brazing flux: the QF brazing flux,
Welding temperature is 605 ± 5 ℃;
5. cold drawing housing and cover plate agitating friction welding
Adopt 4 millimeters stirring-heads of Φ
Rotating speed: 1500 rev/mins,
Pressure: 1.2 tons,
Welding pace: 300mm/min;
6. carry out the machining of cold drawing profile and two ends ventilating opening by design drawing, the two ends ventilating opening is processed in the soldering processes hole, promptly make the aluminium alloy air cold plate.
Claims (5)
1. air cold plate sealing forming technology of aluminum alloy is characterized in that it may further comprise the steps:
Step 1. is carried out the sharp processing of cold drawing housing (1), radiating fin (3) and cover plate (2) part by structural design, and the structural design of cold drawing is embedded cavity body structure, respectively offers (4) 2-3 in soldering processes hole at the two ends of cold drawing housing (1);
Step 2. is welded radiating fin (3) and cold drawing housing (1) and cover plate (2) with nitrogen protection furnace brazing process;
Step 3. mills out the printed circuit board (PCB) slot on the cold drawing housing;
Step 4. adopts the friction stir welding welding with cover plate and housing vertical weld;
Step 5. is carried out the machining of cold drawing profile and two ends ventilating opening by drawing, and the two ends ventilating opening is processed in the soldering processes hole, promptly makes the aluminium alloy air cold plate.
2. air cold plate sealing forming technology of aluminum alloy according to claim 1, it is characterized in that: the structural design of described cold drawing is embedded cavity body structure, cover plate (2) is 0.10-0.20mm with cold drawing housing (1) fit clearance, and overlap joint step width W and weld seam depth of weld H are not less than 3mm all the time.
3. air cold plate sealing forming technology of aluminum alloy according to claim 1 is characterized in that: there is the plate distance in the soldering processes hole (4) in the described step 1 more than 3 millimeters with weld seam H lower end.
4. air cold plate sealing forming technology of aluminum alloy according to claim 1 is characterized in that: in the described step 2, aluminium-silicon eutectic solder is adopted in soldering, cooperates the QF brazing flux to carry out.
5. air cold plate sealing forming technology of aluminum alloy according to claim 1 is characterized in that: in the described step 3, agitating friction is welded under 350～480 ℃, 1.0-1.2 ton pressure and carries out.
Priority Applications (1)
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| CN 200710019462 CN100491058C (en) | 2007-01-26 | 2007-01-26 | Air cold plate sealing forming technology of aluminum alloy |
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|---|---|---|---|
| CN 200710019462 CN100491058C (en) | 2007-01-26 | 2007-01-26 | Air cold plate sealing forming technology of aluminum alloy |
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| CN101007381A CN101007381A (en) | 2007-08-01 |
| CN100491058C true CN100491058C (en) | 2009-05-27 |
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| CN 200710019462 Expired - Fee Related CN100491058C (en) | 2007-01-26 | 2007-01-26 | Air cold plate sealing forming technology of aluminum alloy |
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| CN102398145B (en) * | 2011-08-02 | 2014-07-09 | 罗键 | Whole near net-shape processing and manufacturing method of snake-shaped runner ice-making board |
| CN103079356B (en) * | 2012-12-27 | 2016-09-14 | 深圳市五株科技股份有限公司 | Cuprio is embedded in the manufacturing process for printed circuit board of circuit |
| CN105470426A (en) * | 2015-12-28 | 2016-04-06 | 上海汽车制动器有限公司 | Battery frame tray with water cooling plate and processing method of battery frame tray |
| CN106041347A (en) * | 2016-06-24 | 2016-10-26 | 无锡市豫达换热器有限公司 | Heat exchanger combining vacuum brazing technology with friction stir welding technology |
| CN106181277A (en) * | 2016-07-29 | 2016-12-07 | 苏州聚力电机有限公司 | A kind of molding heat radiator method having concealed temperature-uniforming plate |
| CN106141603A (en) * | 2016-07-29 | 2016-11-23 | 苏州聚力电机有限公司 | Has the molding heat radiator method of concealed temperature-uniforming plate |
| CN106238934B (en) * | 2016-08-08 | 2018-08-03 | 成都四威高科技产业园有限公司 | Strong molten aluminum cooled case welding method in one kind |
| CN106735971B (en) * | 2017-01-05 | 2019-03-12 | 中国电子科技集团公司第三十八研究所 | A kind of integrated welding method of diffusion welding (DW) agitating friction weldering of aluminium alloy liquid cooled module |
| CN108145365A (en) * | 2018-02-12 | 2018-06-12 | 湖南九方焊接技术有限公司 | A kind of hermetic type cavity welding joint structure and its welding fixture and welding method |
| CN108436249A (en) * | 2018-05-23 | 2018-08-24 | 中国电子科技集团公司第十四研究所 | The welding method of the narrow step overlap joint agitating friction weldering of aluminium alloy |
| CN110899954A (en) * | 2019-11-12 | 2020-03-24 | 广东省焊接技术研究所（广东省中乌研究院） | Friction stir welding process of liquid cooling radiator |
| CN112427799B (en) * | 2020-11-16 | 2022-08-26 | 中国电子科技集团公司第十四研究所 | Friction stir welding manufacturing method of large-size high-thickness aluminum alloy panel |
| CN112372165B (en) * | 2020-11-30 | 2022-06-17 | 宁波江丰电子材料股份有限公司 | Welding method of target cooling back plate |
| CN112911896A (en) * | 2021-01-15 | 2021-06-04 | 无锡方盛换热器股份有限公司 | Brazing combined friction welding type special water-cooling plate structure and processing method |
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| TW530147B (en) * | 2001-06-20 | 2003-05-01 | Showa Denko Kk | Cooling plate and production method therefor |
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Patent Citations (1)
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|---|---|---|---|---|
| TW530147B (en) * | 2001-06-20 | 2003-05-01 | Showa Denko Kk | Cooling plate and production method therefor |
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