CN216802017U - Hot air on-line vacuum welding furnace - Google Patents
Hot air on-line vacuum welding furnace Download PDFInfo
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- CN216802017U CN216802017U CN202220087389.8U CN202220087389U CN216802017U CN 216802017 U CN216802017 U CN 216802017U CN 202220087389 U CN202220087389 U CN 202220087389U CN 216802017 U CN216802017 U CN 216802017U
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Abstract
The utility model relates to the technical field of semiconductor welding, and particularly discloses a hot air online vacuum welding furnace, wherein the vacuum welding furnace comprises a furnace body, a feed inlet is formed in one side of the furnace body, a discharge outlet is formed in the other side of the furnace body, and a preheating region, a constant temperature region, a reflux region, a vacuum region and a cooling region are sequentially arranged between the feed inlet and the discharge outlet in the furnace body; the preheating zone is internally provided with a first hot air circulation flow guide mechanism, the constant temperature zone is internally provided with a second hot air circulation flow guide mechanism, the backflow zone is internally provided with a third hot air circulation flow guide mechanism, the vacuum zone is internally provided with a vacuumizing assembly, and the cooling zone is internally provided with a circulation cooling mechanism. This vacuum welding stove has independent preheating zone, thermostatic zone, recirculation zone, vacuum zone and cooling space, and preheating zone, thermostatic zone, recirculation zone, vacuum zone and cooling space connect the nitrogen gas and insert the mouth, and the inside of furnace body is in vacuum negative pressure environment is guaranteed to the evacuation subassembly in vacuum zone, prevents that the product from contacting oxygen, can effectively prevent the production of cavity.
Description
Technical Field
The utility model relates to the technical field of semiconductor welding, in particular to a hot air online vacuum welding furnace.
Background
With the decreasing size of electronic component packaging, the demand for void-free soldering is increasing. Since welding is performed in a low-oxygen or oxygen-free environment, the generation of voids during welding can be reduced and the welding quality can be improved, and it is desirable that the welding process be performed in a low-oxygen or oxygen-free environment. Most of the existing welding furnaces are used for welding in an atmospheric environment, the generation of cavities cannot be controlled, and the welding quality is not high.
In addition, in the vacuum welding furnace in the prior art, the whole welding process is generally realized in one cavity space. Each soldering operation requires heating from room temperature to soldering temperature and then cooling from soldering temperature to room temperature. When welding is performed for many times, temperature cold and hot impact needs to be performed for many times. Firstly, frequent heating and cooling can cause a great deal of energy loss; secondly, temperature stress fatigue damage can be caused to welding equipment by frequent temperature rise and temperature fall; moreover, the heating and cooling time is long, and the welding efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a hot air online vacuum welding furnace.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a hot air online vacuum welding furnace comprises a rack and a furnace body arranged on the rack, wherein a feed inlet is formed in one side of the furnace body, a discharge outlet is formed in the other side of the furnace body, and a preheating region, a constant temperature region, a reflux region, a vacuum region and a cooling region are sequentially arranged between the feed inlet and the discharge outlet in the furnace body;
the preheating zone is internally provided with a first heated air circulation flow guide mechanism, the constant temperature zone is internally provided with a second heated air circulation flow guide mechanism, the reflux zone is internally provided with a third heated air circulation flow guide mechanism, the vacuum zone is internally provided with a vacuumizing assembly, and the cooling zone is internally provided with a circulating cooling mechanism.
Further, the first hot air circulation diversion mechanism comprises a first sealing cover arranged at the preheating zone, a first air circulation motor arranged on the first sealing cover, a first furnace body unit arranged below the first sealing cover and a first heat conduction assembly arranged in the first furnace body unit, and the first heat conduction assembly is positioned below the first air circulation motor.
Further, the first heat conducting assembly comprises a plurality of first hot air guide plates arranged inside the first furnace body unit, and a first heating wire arranged below the first hot air guide plates, and a plurality of air ports are formed in the first hot air guide plates.
Furthermore, the second heated air circulation diversion mechanism comprises a second sealing cover arranged at the constant temperature area, a second air circulation motor arranged on the second sealing cover, a second furnace body unit arranged below the second sealing cover and a second heat conduction assembly arranged in the second furnace body unit, and the second heat conduction assembly is positioned below the second air circulation motor.
Furthermore, the second heat conduction assembly comprises a plurality of second hot air guide plates arranged inside the second furnace body unit, and second heating wires arranged below the second hot air guide plates, and a plurality of air ports are formed in the second hot air guide plates.
Furthermore, the third heated air circulation diversion mechanism comprises a plurality of third heated air diversion plates arranged inside the second furnace body unit and a third heating wire arranged below the third heated air diversion plates, wherein a plurality of heated air diversion nozzles are arranged on the third heated air diversion plates, and the end parts of the heated air diversion nozzles face the second sealing cover.
Further, the vacuum pumping assembly comprises a third sealing cover arranged at the vacuum area, a third furnace body unit arranged below the third sealing cover and a vacuum pump arranged on the third sealing cover.
Furthermore, a transmission assembly is arranged in the third furnace body unit, and comprises a transmission gear arranged in the third furnace body unit and a transmission chain sleeved on the transmission gear;
the first furnace body unit and the second furnace body unit are connected with a scaling powder treatment device, the scaling powder treatment device comprises a recovery box and a return pipe wound on the recovery box, one end of the return pipe is connected with the bottom of the first furnace body unit or the bottom of the second furnace body unit, and the other end of the return pipe is connected with the recovery box.
Further, the circulating cooling mechanism comprises a fourth sealing cover arranged at the cooling area, a cold air upper circulating motor arranged on the fourth sealing cover, a fourth furnace body unit arranged below the fourth sealing cover, a plurality of cooling plates arranged in the fourth furnace body unit, and a cold air lower circulating motor arranged below the cooling plates;
the surface of the cooling plate is provided with a cold air guide plate, the cold air guide plate is provided with a plurality of air ports, a cooling liquid circulating channel is arranged in the cooling plate, and the end part of the cooling liquid circulating channel is connected with a cooling liquid supply pipe.
Further, the sealing strips are arranged around the first sealing cover, the second sealing cover, the third sealing cover and the fourth sealing cover, the installation sealing performance is guaranteed, and heat insulation materials are filled in the interlayer inside the first sealing cover, the second sealing cover, the third sealing cover and the fourth sealing cover, so that a good heat insulation effect is guaranteed.
Further, the preheating zone, the constant temperature zone, the reflux zone, the vacuum zone and the cooling zone are connected with a nitrogen inlet.
The welding process of the hot air online vacuum welding furnace comprises the following steps:
s1, putting the product into a feed inlet of a furnace body, and sealing the feed inlet and a discharge outlet of the furnace body;
s2, starting a vacuumizing assembly to ensure that the interior of the furnace body is in a vacuum negative pressure environment;
s3, conveying the product into the furnace body, and sequentially passing through a preheating zone, a constant temperature zone, a reflux zone, a vacuum zone and a cooling zone;
and S4, discharging at a discharge hole of the furnace body.
The utility model has the beneficial effects that: 1. the vacuum welding furnace is provided with a preheating region, a constant temperature region, a reflux region, a vacuum region and a cooling region which are independent, wherein the preheating region, the constant temperature region, the reflux region, the vacuum region and the cooling region are connected with a nitrogen inlet, and a vacuumizing assembly in the vacuum region ensures that the interior of a furnace body is in a vacuum negative pressure environment to prevent a product from contacting oxygen;
2. in the process of welding the product in the furnace body, the product is sequentially heated after passing through a preheating zone, a constant temperature zone and a reflux zone to achieve the welding effect, and the vacuum welding furnace can effectively prevent the generation of cavities by controlling factors such as vacuum degree, heating speed, heating time and the like, so that the non-cavity welding is realized;
3. through the structural design, the device is more accurate in product transmission speed control and temperature curve control, the temperature curve of the backflow area reaches the best melting state, bubbles can be discharged through the vacuum area, and welding quality is guaranteed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an assembled view of the present invention;
FIG. 3 is a schematic cross-sectional view of a preheating zone according to the present invention;
FIG. 4 is a schematic cross-sectional view of a constant temperature zone and a recirculation zone of the present invention;
FIG. 5 is a schematic cross-sectional view of the cooling zone of the present invention;
FIG. 6 is a schematic view of a flux handling device of the present invention.
1. A frame; 2. a furnace body; 21. a feed inlet; 22. a discharge port; 23. a preheating zone; 24. a constant temperature area; 25. a reflux zone; 26. a vacuum zone; 27. a cooling zone; 3. a first hot air circulation flow guide mechanism; 31. a first sealing cover; 32. a first air circulation motor; 33. a first furnace unit; 34. a first hot air flow guide plate; 35. a first heating wire; 4. a second hot air circulation flow guide mechanism; 41. a second sealing cover; 42. a second air circulation motor; 43. a second furnace body unit; 44. a second hot air flow guide plate; 45. a second heating wire; 5. a third hot air circulation flow guide mechanism; 51. a third hot air deflector; 52. a third heating wire; 53. a hot air flow guide nozzle; 6. a vacuum pumping assembly; 61. a third sealing cover; 62. a third furnace body unit; 63. a vacuum pump; 64. a transmission gear; 65. a drive chain; 7. a circulating cooling mechanism; 71. a fourth sealing cover; 72. a cold air upper circulation motor; 73. a fourth furnace body unit; 74. a cooling plate; 75. a cold air lower circulation motor; 76. a cold air flow guide plate; 77. a coolant circulation passage; 8. a flux treatment device; 81. a recycling bin; 82. a return pipe.
Detailed Description
As shown in fig. 1 and fig. 2, an online hot air vacuum welding furnace comprises a frame 1, a furnace body 2 mounted on the frame 1, a feeding port 21 arranged on one side of the furnace body 2, a discharging port 22 arranged on the other side of the furnace body 2, and a preheating region 23, a constant temperature region 24, a reflux region 25, a vacuum region 26 and a cooling region 27 which are arranged between the feeding port 21 and the discharging port 22 in the furnace body 2 in sequence; any one of the preheating zone 23, the constant temperature zone 24, the reflux zone 25, the vacuum zone 26 and the cooling zone 27 may be connected to a nitrogen inlet.
A first hot air circulation flow guide mechanism 3 is arranged in the preheating area 23, a second hot air circulation flow guide mechanism 4 is arranged in the constant temperature area 24, a third hot air circulation flow guide mechanism 5 is arranged in the backflow area 25, a vacuumizing assembly 6 is arranged in the vacuum area 26, and a circulation cooling mechanism 7 is arranged in the cooling area 27.
Further, as shown in fig. 3, the first heated air circulation guide mechanism 3 includes a first sealing cover 31 installed at the preheating zone 23, a first air circulation motor 32 installed on the first sealing cover 31, a first furnace unit 33 installed below the first sealing cover 31, and a first heat conduction assembly disposed in the first furnace unit 33, the first heat conduction assembly being located below the first air circulation motor 32.
The first heat conducting assembly comprises a plurality of first hot air guide plates 34 arranged inside the first furnace body unit 33, a first heating wire 35 arranged below the first hot air guide plates 34, and a plurality of air ports are arranged on the first hot air guide plates 34.
As shown in fig. 4, the second hot air circulation diversion mechanism 4 includes a second sealing cover 41 installed at the constant temperature region 24, a second air circulation motor 42 installed on the second sealing cover 41, a second furnace body unit 43 installed below the second sealing cover 41, and a second heat conduction assembly arranged in the second furnace body unit 43, the second heat conduction assembly is located below the second air circulation motor 42, the second heat conduction assembly includes a plurality of second hot air diversion plates 44 installed inside the second furnace body unit 43, and a second heating wire 45 installed below the second hot air diversion plates 44, and a plurality of air openings are provided on the second hot air diversion plates 44.
The third heated air circulation diversion mechanism 5 includes a plurality of third heated air diversion plates 51 installed inside the second furnace body unit 43, and a third heating wire 52 installed below the third heated air diversion plates 51, a plurality of heated air diversion nozzles 53 are provided on the third heated air diversion plates 51, and the end parts of the heated air diversion nozzles 53 face the second sealing cover 43. The hot air guiding nozzle 53 has an air flow guiding function, so that hot air is not dispersed too much, and outflow air is controlled according to the quantity and the density, wherein the air is circulating air, can be nitrogen or air.
It should be noted that the temperature of each hot air guide plate in the preheating zone 23, the constant temperature zone 24, and the reflux zone 25 is controllable, and the temperature is increased in sequence, and the set temperature is 100 degrees centigrade, 200 degrees centigrade, 220 degrees centigrade, and 240 degrees centigrade to 350 degrees centigrade.
Further, the vacuum pumping assembly 6 includes a third sealing cover 61 installed at the vacuum region 26, a third furnace unit 62 installed below the third sealing cover 61, and a vacuum pump 63 installed on the third sealing cover 61.
A transmission assembly is arranged in the third furnace body unit 62, and comprises a transmission gear 64 arranged in the third furnace body unit 62 and a transmission chain 65 sleeved on the transmission gear 64;
as shown in fig. 5, the circulation cooling mechanism 7 includes a fourth sealing cover 71 installed at the cooling zone 27, a cool air upper circulation motor 72 installed on the fourth sealing cover 71, a fourth furnace unit 73 installed below the fourth sealing cover 71, a plurality of cooling plates 74 disposed in the fourth furnace unit 73, a cool air lower circulation motor 75 disposed below the cooling plates 74;
the surface of the cooling plate 74 is provided with a cold air guide plate 76, the cold air guide plate 76 is provided with a plurality of air ports, a cooling liquid circulating channel 77 is arranged in the cooling plate 74, and the end part of the cooling liquid circulating channel 77 is connected with a cooling liquid supply pipe.
Further, as shown in fig. 6, the first furnace unit 33 and the second furnace unit 43 are connected to the flux treatment device 8, the flux treatment device 8 includes a recycling box 81, and a return pipe 82 wound around the recycling box 81, one end of the return pipe 82 is connected to the bottom of the first furnace unit 33 or the second furnace unit 43, the other end is connected to the recycling box 81, and the recycling box 81 can be provided with a filter for filtering the recycled flux.
Furthermore, the sealing strips are arranged on the peripheries of the first sealing cover 31, the second sealing cover 41, the third sealing cover 61 and the fourth sealing cover 71 to ensure the installation tightness, and the heat insulating materials are filled in the internal interlayers of the first sealing cover 31, the second sealing cover 41, the third sealing cover 61 and the fourth sealing cover 71 to ensure a good heat insulating effect.
The welding process of the hot air online vacuum welding furnace comprises the following steps:
step S1, putting the product into the feeding 21 of the furnace body 2, and sealing the feeding port 21 and the discharging port 22 of the furnace body 2;
step S2, starting the vacuumizing assembly to ensure that the interior of the furnace body 2 is in a vacuum negative pressure environment;
step S3, conveying the product into the furnace body, and sequentially passing through a preheating zone 23, a constant temperature zone 24, a reflux zone 25, a vacuum zone 26 and a cooling zone 27;
when the product is conveyed to the preheating zone 23, hot air flow generated by the first hot air circulation flow guide mechanism 3 is guided out by the first hot air flow guide plate 34 and contacts with the product, so that the preheating effect is achieved; after the product enters the constant temperature area 24, hot air flow generated by the second hot air circulation flow guide mechanism 4 is guided out by the second hot air flow guide plate 44 and contacts with the product, so that the effect of constant heating is achieved; after the product enters the reflow zone 25, at the moment, hot air flow generated by the third hot air circulation flow guide mechanism 5 is guided out by the third hot air flow guide plate 51 and contacts with the product, the temperature reaches the highest, after the solder is completely melted, the vacuum zone detects that the product is in place, the third sealing cover 61 descends and closes, the vacuumizing operation is started, the vacuumizing time is reached, the nitrogen gas inlet is filled with nitrogen gas to release vacuum, when the normal pressure is reached, the third sealing cover 61 is opened and is transmitted to the cooling zone for cooling, the number of the cooling zone is three, the temperature zone is longer, and the cooling speed is higher.
And step S4, discharging at the discharge port 22 of the furnace body 2.
In conclusion, the vacuum welding furnace is provided with the independent preheating zone 23, the constant temperature zone 24, the reflow zone 25, the vacuum zone 26 and the cooling zone 27, the preheating zone 23, the constant temperature zone 24, the reflow zone 25, the vacuum zone 26 and the cooling zone 27 can be connected with nitrogen gas inlets, and the vacuumizing assembly of the vacuum zone 26 ensures that the interior of the furnace body 2 is in a vacuum negative pressure environment, so that products are prevented from contacting oxygen gas;
in the process of welding the product in the furnace body, the product is sequentially heated after passing through the preheating zone 23, the constant temperature zone 24 and the reflow zone 25 to achieve the welding effect, and the vacuum welding furnace can effectively prevent the generation of cavities by controlling the factors such as vacuum degree, heating speed, heating time and the like, so that the non-cavity welding is realized;
through the structural design, the device is more accurate in product transmission speed control and temperature curve control, the temperature curve of the backflow area reaches the best melting state, bubbles can be discharged through the vacuum area, and welding quality is guaranteed.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. A hot air online vacuum welding furnace comprises a rack and a furnace body arranged on the rack, wherein a feed inlet is formed in one side of the furnace body, a discharge outlet is formed in the other side of the furnace body, and the furnace body is characterized in that a preheating region, a constant temperature region, a reflux region, a vacuum region and a cooling region are sequentially arranged between the feed inlet and the discharge outlet in the furnace body;
the preheating zone is internally provided with a first heated air circulation flow guide mechanism, the constant temperature zone is internally provided with a second heated air circulation flow guide mechanism, the reflux zone is internally provided with a third heated air circulation flow guide mechanism, the vacuum zone is internally provided with a vacuumizing assembly, and the cooling zone is internally provided with a circulating cooling mechanism.
2. The hot air in-line vacuum welding furnace of claim 1, wherein the first hot air circulation guiding mechanism comprises a first sealing cover installed at the preheating zone, a first air circulation motor installed on the first sealing cover, a first furnace body unit installed below the first sealing cover, and a first heat conducting assembly arranged in the first furnace body unit, wherein the first heat conducting assembly is located below the first air circulation motor.
3. The hot air online vacuum welding furnace according to claim 2, wherein the first heat conducting assembly comprises a plurality of first hot air guide plates arranged inside the first furnace body unit, and a first heating wire arranged below the first hot air guide plates, and a plurality of air ports are arranged on the first hot air guide plates.
4. The hot air online vacuum welding furnace as claimed in claim 2, wherein the second hot air circulation diversion mechanism comprises a second sealing cover installed at the constant temperature area, a second air circulation motor installed on the second sealing cover, a second furnace body unit installed below the second sealing cover, and a second heat conduction assembly arranged in the second furnace body unit, and the second heat conduction assembly is located below the second air circulation motor.
5. The hot air online vacuum welding furnace according to claim 4, wherein the second heat conducting assembly comprises a plurality of second hot air guiding plates installed inside the second furnace body unit, and a second heating wire installed below the second hot air guiding plates, and a plurality of air ports are arranged on the second hot air guiding plates.
6. The hot air online vacuum welding furnace as claimed in claim 4, wherein the third hot air circulation guiding mechanism comprises a plurality of third hot air guiding plates installed inside the second furnace body unit, and a third heating wire installed below the third hot air guiding plates, the third hot air guiding plates are provided with a plurality of hot air guiding nozzles, and the ends of the hot air guiding nozzles face the second sealing cover.
7. The hot-blast in-line vacuum welding furnace as claimed in claim 6, wherein said vacuum pumping assembly comprises a third sealing cover installed at said vacuum region, a third furnace body unit installed below the third sealing cover, and a vacuum pump installed on said third sealing cover.
8. The hot air online vacuum welding furnace as claimed in claim 7, wherein a transmission assembly is arranged in the third furnace body unit, the transmission assembly comprises a transmission gear arranged in the third furnace body unit and a transmission chain sleeved on the transmission gear;
the first furnace body unit and the second furnace body unit are connected with a soldering flux treatment device, the soldering flux treatment device comprises a recovery box and a return pipe wound on the recovery box, one end of the return pipe is connected with the bottom of the first furnace body unit or the bottom of the second furnace body unit, and the other end of the return pipe is connected with the recovery box.
9. The hot-air online vacuum welding furnace as claimed in claim 7, wherein the circulating cooling mechanism comprises a fourth sealing cover installed at the cooling zone, a cold-air upper circulating motor installed on the fourth sealing cover, a fourth furnace body unit installed below the fourth sealing cover, a plurality of cooling plates disposed in the fourth furnace body unit, and a cold-air lower circulating motor disposed below the cooling plates;
the surface of the cooling plate is provided with a cold air guide plate, the cold air guide plate is provided with a plurality of air ports, a cooling liquid circulating channel is arranged in the cooling plate, and the end part of the cooling liquid circulating channel is connected with a cooling liquid supply pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220087389.8U CN216802017U (en) | 2022-01-13 | 2022-01-13 | Hot air on-line vacuum welding furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220087389.8U CN216802017U (en) | 2022-01-13 | 2022-01-13 | Hot air on-line vacuum welding furnace |
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| CN216802017U true CN216802017U (en) | 2022-06-24 |
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| CN202220087389.8U Active CN216802017U (en) | 2022-01-13 | 2022-01-13 | Hot air on-line vacuum welding furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160907A (en) * | 2022-01-13 | 2022-03-11 | 诚联恺达科技有限公司 | Hot air online vacuum welding furnace and welding process thereof |
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2022
- 2022-01-13 CN CN202220087389.8U patent/CN216802017U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114160907A (en) * | 2022-01-13 | 2022-03-11 | 诚联恺达科技有限公司 | Hot air online vacuum welding furnace and welding process thereof |
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