CN115090980A - Vacuum brazing equipment and vacuum cup brazing production process - Google Patents
Vacuum brazing equipment and vacuum cup brazing production process Download PDFInfo
- Publication number
- CN115090980A CN115090980A CN202210657419.9A CN202210657419A CN115090980A CN 115090980 A CN115090980 A CN 115090980A CN 202210657419 A CN202210657419 A CN 202210657419A CN 115090980 A CN115090980 A CN 115090980A
- Authority
- CN
- China
- Prior art keywords
- furnace chamber
- furnace
- cooling
- vacuum
- brazing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005219 brazing Methods 0.000 title claims abstract description 103
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 107
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 238000003466 welding Methods 0.000 claims abstract description 41
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000011261 inert gas Substances 0.000 claims description 61
- 229910000679 solder Inorganic materials 0.000 claims description 57
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 40
- 239000000498 cooling water Substances 0.000 claims description 24
- 238000002844 melting Methods 0.000 claims description 21
- 230000008018 melting Effects 0.000 claims description 21
- 229910052786 argon Inorganic materials 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 16
- 238000009792 diffusion process Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 6
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 5
- 238000007711 solidification Methods 0.000 description 5
- 230000008023 solidification Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/001—Sealing small holes in metal containers, e.g. tins
-
- 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
- B23K1/008—Soldering within a furnace
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/04—Heating appliances
- B23K3/047—Heating appliances electric
- B23K3/0471—Heating appliances electric using resistance rod or bar, e.g. carbon silica
-
- 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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/085—Cooling, heat sink or heat shielding means
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/12—Vessels
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
- B23K2103/05—Stainless steel
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/14—Titanium or alloys thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tunnel Furnaces (AREA)
Abstract
The invention discloses vacuum brazing equipment and a vacuum cup brazing production process, which comprise the following steps: the furnace comprises a furnace body, an air pressure regulating system, a heating system, a control system and a cooling system; a furnace chamber and an air charging and discharging interface which can be communicated with the furnace chamber are arranged in the furnace body; a welding area for arranging welded products is arranged in the furnace chamber; the heating system comprises a plurality of heating bodies arranged on the wall of the furnace chamber; the cooling system comprises a plurality of air outlets which are arranged on the wall of the furnace chamber and face the welding area, and side air outlet hoods which are correspondingly covered on the air outlets; the air pressure regulating system is used for regulating the pressure in the furnace chamber; the control system is electrically connected with the air pressure regulating system, the heating system and the cooling system; the side air outlet fan cover structure is approximately a cylinder with an opening at one end and a closed end, a shunting cavity is arranged in the cylinder, and a side air outlet communicated with the shunting cavity is arranged on the side wall of the cylinder; the side air outlet fan cover encloses the air outlet in the shunting cavity through the opening.
Description
Technical Field
The application relates to the technical field of vacuum brazing, in particular to vacuum brazing equipment and a vacuum cup brazing production process.
Background
The vacuum cup is a water container made of titanium alloy or stainless steel and a vacuum layer, and has a vacuum heat insulation interlayer to delay heat dissipation of water and other liquid in the vacuum cup, so as to achieve the purpose of heat preservation. The vacuum insulation layer is generally vacuum in order to prevent heat conduction.
At present, a vacuum insulation interlayer of the vacuum cup is vacuumized, and a cup body of the vacuum cup is produced in a brazing and sealing mode, but after the vacuum cup is subjected to high-temperature vacuum brazing, in a cooling stage, conservative cooling parameter process equipment is adopted to ensure the quality of the vacuum cup, so that a very long cooling period is caused, even an active cooling device is not adopted, furnace cooling is adopted, so that brazing solder is solidified, and the processing and production efficiency is low.
Disclosure of Invention
The invention mainly aims at the problems, provides vacuum brazing equipment and a vacuum cup brazing production process, and aims to solve the technical problems in the background technology.
To achieve the above object, the present invention provides a vacuum brazing apparatus comprising: the furnace comprises a furnace body, an air pressure regulating system, a heating system, a control system and a cooling system; a furnace chamber and an air charging and discharging interface which can be communicated with the furnace chamber are arranged in the furnace body; a welding area for arranging welded products is arranged in the furnace chamber; the heating system comprises a plurality of heating bodies arranged on the wall of the furnace chamber; the cooling system comprises a plurality of air outlets which are arranged on the wall of the furnace chamber and face the welding area, and side air outlet hoods which are correspondingly covered on the air outlets; the air pressure regulating system is used for regulating the pressure in the furnace chamber; the control system is electrically connected with the air pressure adjusting system, the heating system and the cooling system;
the side air outlet hood structure is a cylinder with an opening at one end and a closed end, a shunting cavity is arranged in the cylinder, and a side air outlet communicated with the shunting cavity is arranged on the side wall of the cylinder; the side air outlet fan cover encloses the air outlet in the flow dividing cavity through the opening.
Furthermore, the furnace body comprises an outer shell and an inner shell, the cooling system also comprises a cooling water channel arranged between the outer shell and the inner shell, a cooling water tower device arranged outside the furnace body and communicated with the cooling water channel, and a water flow meter group connected with the cooling water channel and the cooling water tower device;
the heating bodies are nickel-chromium resistance belts and are uniformly distributed along the wall of the furnace chamber;
the air outlets are uniformly distributed along the wall of the furnace chamber and are arranged with the heating body in a staggered mode at intervals;
the cooling system also comprises cooling equipment, a first connecting pipeline and a second connecting pipeline; one end of the first connecting pipeline is communicated with the furnace chamber, and the other end of the first connecting pipeline is communicated with the cooling equipment; one end of the second connecting pipeline is communicated with the cooling equipment, and the other end of the second connecting pipeline is communicated with the air outlets;
the air pressure adjusting system comprises a mechanical pump, a roots pump and a diffusion pump which are communicated with the furnace chamber.
A vacuum cup brazing production process comprises the following process steps:
s100, placing a vacuum cup to be processed in a welding area in a vacuum furnace chamber, covering a furnace door and sealing the furnace chamber;
s200, vacuumizing a furnace chamber;
s300, controlling the heating temperature in the vacuum furnace until the brazing solder is molten and liquid to seal and seal the through hole of the vacuum cup, and stopping heating and preserving heat;
s400, stopping vacuum pumping, filling inert gas into the furnace chamber, and adjusting the pressure of the furnace chamber to be positive pressure;
s500, opening a plurality of air outlets arranged along the periphery of the welding area to output cooling inert gas, wherein the cooling inert gas output by the air outlets is not directly blown to the welding area, and discharging the vacuum cup from the furnace when the temperature in the furnace chamber is cooled to 150-100 ℃ or below 100 ℃.
In the step S500, the inert gas is argon, the temperature of the argon is controlled to be 45 ℃, and the air pressure 85000pa of the argon blown out from the air outlet is controlled; and after the brazing solder is solidified, controlling the wind pressure of cooling argon blown out from the air outlet to be 130000pa, and discharging the brazing solder after the vacuum cup is cooled to 150-100 ℃ or below 100 ℃.
Further, in the step S500, an external inert gas source is used to fill the furnace chamber with inert gas, the inert gas in the furnace chamber is extracted by a cooling device communicated with the furnace chamber to be cooled to 45 ℃, and then the cooled inert gas is output to the furnace chamber through an air outlet.
Further, in the step S300, the heating temperature in the vacuum furnace is controlled to +10 ℃ to +30 ℃ of the melting point temperature of the brazing filler metal, and the heating and heat preservation are stopped after the heat preservation is performed for 30 minutes.
Further, in the step S200, a mechanical vacuum pump is used to evacuate the furnace chamber until the pressure in the furnace reaches 2000 Pa; preheating a diffusion pump; starting a roots pump to pump vacuum in the furnace chamber until the pressure in the furnace is high vacuum; the temperature of the diffusion pump reaches 245 ℃, the diffusion pump is started to pump the pressure in the furnace chamber from high vacuum to the pressure in the furnace of 6 multiplied by 10 -3 Pa。
Further, after the temperature in the furnace chamber is reduced to-20 to-30 ℃ of the melting point temperature of the brazing solder, the wind pressure of cooling argon blown out from the air outlet is controlled to be 130000pa, and the vacuum cup is cooled to 150 to 100 ℃ or below 100 ℃ and then is discharged.
Further, in step S400, inert gas is filled into the furnace chamber, and the pressure of the furnace chamber is adjusted to 130000 pa.
Further, in the step S500, when the furnace chamber and the welding zone are cooled, the inert gas is supplemented into the furnace chamber until the furnace chamber pressure is 130000pa when the cooling inert gas in the furnace chamber is less than 85000 pa.
Compared with the prior art, the vacuum brazing equipment and the vacuum cup brazing production process provided by the invention have the advantages that the cooling inert gas output from the air outlets is not directly blown to the welding area, and the cooling inert gas flowing from the air outlets carries away high-temperature heat in the furnace chamber for cooling, so that brazing solder is solidified more quickly and reasonably, and the temperature in the cooling furnace chamber is reduced more quickly; the cooling inert gas is prevented from being directly blown to the processed vacuum cup of the welding area to blow the brazing solder, the pressure change of the welding area caused by the direct blowing of the cooling inert gas to the welding area is avoided, the melting point of the brazing solder is reduced, and the time for the brazing solder to solidify is prolonged; the utilization rate of the vacuum brazing furnace is improved, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic view of a furnace chamber of a vacuum brazing apparatus according to the present application.
Fig. 2 is an enlarged view of fig. 1 at a.
Fig. 3 is a schematic structural view of a side air outlet hood of a vacuum brazing apparatus according to the present application.
FIG. 4 is a top view of the furnace chamber structure of a vacuum brazing apparatus of the present application.
FIG. 5 is a side view of the furnace chamber structure of a vacuum brazing apparatus of the present application.
Reference numerals shown in the drawings: 1. a furnace body; 110. a furnace chamber; 111. a welding area; 120. an inflation and deflation interface; 210. a mechanical pump; 220. a roots pump; 230. a diffusion pump; 3. a control system; 4. a cooling system; 410. an air outlet; 420. a side air outlet hood; 421. an opening; 422. a shunting cavity; 423. a side air outlet; 430. cooling equipment; 440. a first connecting pipe; 450. a second connecting pipe; 460. a water flow meter group; 5. a heating body; 6. and (4) a skip car.
Detailed Description
Referring to fig. 1 to 5, the present embodiment provides a vacuum brazing apparatus, including: the furnace comprises a furnace body 1, an air pressure regulating system, a heating system, a control system 3 and a cooling system 4; a furnace chamber 110 and an air charging and discharging interface 120 which can be communicated with the furnace chamber 110 are arranged in the furnace body 1; a welding area 111 for arranging welded products is arranged in the furnace chamber 110; the heating system comprises a plurality of heating bodies 5 arranged on the wall of the furnace chamber 110; the cooling system 4 includes a plurality of air outlets 410 disposed on the wall of the furnace chamber 110 and facing the welding region 111, and a side air outlet hood 420 correspondingly covering the air outlets 410; the air pressure adjusting system is used for adjusting the pressure in the furnace chamber 110; the control system 3 is electrically connected with the air pressure adjusting system, the heating system and the cooling system 4;
the side air outlet cover 420 is a cylinder with an opening 421 at one end and a closed end, a shunting cavity 422 is arranged in the cylinder, and a side air outlet 423 communicated with the shunting cavity 422 is arranged on the side wall of the cylinder; the side air outlet cover 420 encloses the air outlet 410 in the branch chamber 422 through the opening 421.
When the furnace body 1, the air pressure adjusting system, the heating system and the control system 3 cooperate to vacuumize the welding area 111, and the brazing solder is melted into liquid after the heating and the temperature rise are finished, after sealing and plugging the welding seam of the product to be welded, stopping heating and preserving heat, adjusting the pressure in the furnace chamber 110 to a preset positive pressure by the air pressure adjusting system, filling inert gas into the furnace chamber 110 through the gas filling and discharging interface 120 by using an external inert gas source, cooling the inert gas filled in the furnace chamber 110 by the temperature reducing system 4, pressurizing the cooled inert gas and outputting the pressurized inert gas through the air outlet 410 to start to reduce the temperature in the furnace chamber 110 and the processed product, because the air outlet 410 is provided with the side air outlet hood 420, the side air outlet hood 420 divides the flow of the pressurized cooling inert gas towards the welding area 111, and the phenomenon that the pressurized cooling inert gas directly blows the molten liquid brazing solder of the processed product of the welding area 111 is avoided; the pressurized and cooled inert gas flow is output through the side air outlet 423 on the side wall of the side air outlet hood 420, so that the cooled inert gas carries away the high-temperature heat in the furnace chamber 110, and after being cooled again by the cooling system 4, the side air outlet 423 of the side air outlet hood 420 is pressurized and output, and the above steps are repeated.
In some embodiments, the side wall of the cylinder of the side air-out hood 420 is provided with a plurality of side air outlets 423 communicating with the branch chamber 422, and preferably, the number of the side air outlets 423 is four, and the side air outlets 423 are uniformly distributed in the middle of the side wall of the cylinder of the side air-out hood 420.
The working parameters of the air pressure adjusting system, the heating system and the cooling system 4 can be adjusted by controlling the control system 3.
Referring to fig. 1 to 5, the furnace body 1 includes an outer shell and an inner shell, the cooling system 4 further includes a cooling water channel (not shown) disposed between the outer shell and the inner shell, a cooling water tower device (not shown) disposed outside the furnace body 1 and communicated with the cooling water channel, and a water flow meter set 460 connected to the cooling water channel and the cooling water tower device;
the heating bodies 5 are nickel-chromium resistance belts and are uniformly distributed along the wall of the furnace chamber 110;
the air outlets 410 are uniformly distributed along the wall of the furnace chamber 110 and are arranged in a staggered manner with the heating body 5 at intervals;
the cooling system 4 further comprises a cooling device 430, a first connecting pipeline 440 and a second connecting pipeline 450; one end of the first connecting pipeline 440 is communicated with the furnace chamber 110, and the other end is communicated with the temperature reduction device 430; one end of the second connecting pipeline 450 is communicated with the cooling device 430, and the other end is communicated with the plurality of air outlets 410;
the gas pressure regulating system includes a mechanical pump 210, a roots pump 220, and a diffusion pump 230 in communication with the furnace chamber 110.
By arranging the cooling water path between the outer shell and the inner shell, heat in the furnace chamber 110 is prevented from being transferred to the outer shell of the furnace body 1, so that workers outside the furnace body 1 are prevented from being scalded and damaged by heat radiation;
preferably, still be equipped with rivers table group 460 between cooling water route and the cooling water tower device, can in time observe the return water flow of every way between cooling water route and the cooling water tower device through rivers table group 460, the cooling water flow condition prevents the accident, and the cooling water tower device provides the cooling circulation to the cooling water body in the cooling water route.
By selecting the heating body 5 as the nickel-chromium resistance belt, the nickel-chromium resistance belt has high electric-heat conversion rate, high strength at high temperature, long service life, repeated temperature rise and re-cooling, no brittleness of the material, long service life, high heat radiation rate, and better corrosion resistance and oxidation resistance. And the nickel-chromium resistance belts are uniformly distributed along the wall of the furnace chamber 110, so that the processed product is uniformly heated.
In some embodiments, the temperature reduction device 430 is an air-cooled temperature reducer. The inert gas filled in the furnace chamber 110 is pumped into the temperature reducing device 430 by the temperature reducing device 430 through the first connecting pipe 440 to be cooled, and then the cooled inert gas is pressurized and output to the plurality of air outlets 410 through the second connecting pipe 450. The inert gas in the furnace chamber 110 is circulated in a reciprocating way, so that the temperature in the furnace chamber 110 is quickly reduced, and the production efficiency is greatly improved.
Preferably, the furnace bodies 1, the heating systems and the cooling systems 4 are two in number to form double-furnace-chamber 110-type vacuum brazing equipment, the two furnace bodies 1 share the air pressure regulating system and the control system 3, work simultaneously, do not interfere with each other, and are high in production efficiency.
In some embodiments, after the brazing solder is solidified, the side air-out hood 420 of the air outlet 410 is removed by an automated device, so that the air outlet 410 blows the product on the welding region 111 directly, and the cooling speed of the product is further increased.
A vacuum cup brazing production process comprises the following process steps:
s100, placing a vacuum cup to be processed in a welding area in a vacuum furnace chamber, covering a furnace door and sealing the furnace chamber;
s200, vacuumizing a furnace chamber;
s300, controlling the heating temperature in the vacuum furnace until the brazing solder is molten and liquid to seal and seal the through hole of the vacuum cup, and stopping heating and preserving heat;
s400, stopping vacuum pumping, filling inert gas into the furnace chamber, and adjusting the pressure of the furnace chamber to be positive pressure;
s500, opening a plurality of air outlets arranged along the periphery of the welding area to output cooling inert gas, wherein the cooling inert gas output by the air outlets is not directly blown to the welding area, and discharging the vacuum cup from the furnace when the temperature in the furnace chamber is cooled to 150-100 ℃ or below 100 ℃.
In some embodiments, the vacuum cup comprises an inner cup body and an outer cup body which are integrally formed, an interlayer space is formed between the inner cup body and the outer cup body, the bottom of the outer cup body is an open end, and the open end connected with the bottom of the outer cup body is preformed through the outer edge of a sealing cover; the cover has a through hole communicating with the space between the inner and outer cup bodies, and brazing solder has been preset to the vicinity of the through hole. A plurality of vacuum cups to be processed are loaded into the skip 6.
And (6) feeding the skip 6 loaded with the vacuum cup to be processed into a welding area in the vacuum furnace chamber, covering the furnace door to seal the furnace chamber, and sealing the through hole of the vacuum cup by the brazing solder in a molten liquid state after S200-S400.
In traditional technology means, because the direct perpendicular facing weld district's of cooling wind gap in traditional furnace body thermos cup by processing, cooling gas flows and can blows to the brazing solder, in order to avoid the cooling wind gap wind pressure too big, blow molten liquid brazing solder, lead to molten liquid brazing solder to take place to flow, no longer to thermos cup thru hole shutoff sealing-in, blown off from the thermos cup even, lead to bad waste product, it is very little to debug cooling wind gap wind pressure at cooling initial stage usually, lead to the cooling in the furnace chamber very slowly that becomes undoubtedly like this, need lengthy time, just can be with the furnace indoor temperature drop to the brazing solder solidification point, just can increase cooling wind gap wind pressure, carry out the cooling to the furnace chamber with higher speed.
Except for the brazing solder of the processed vacuum cup which is directly and vertically opposite to the welding area by the cooling air port in the furnace body, the molten liquid brazing solder can be blown by large air pressure, even if the air pressure is adjusted to a range of avoiding blowing the molten liquid brazing solder, because the cooling air port directly and vertically faces to the welding area, the pressure at the welding area is reduced under the influence of the factor that the pressure is small at the place with large gas flow velocity, the brazing solder is generally a crystal material with a fixed melting point, but under the factor of pressure change, if the pressure change, the melting point of a substance also needs to be changed, when the pressure is increased, the melting point of the substance is increased, and conversely, when the pressure is reduced, the melting point of the substance is reduced.
The technical personnel in the field do not realize that the pressure airflow directly acts on the surface of the brazing solder, the cooling solidification of the solder can not be accelerated, but the melting point of the solder is reduced, the solidification time of the solder is prolonged, so that the temperature in the furnace chamber is reduced to the solidification point of the brazing solder, the brazing solder is solidified, the air pressure of a cooling air port is increased in advance, and under the condition, the brazing solder which is not completely solidified is blown to flow, and the through hole of the vacuum cup is not blocked and sealed any more; secondly, the increase of wind pressure and rapid quenching cause the over-large internal stress of brazing solder and the cracking of brazing seams, thus causing the vacuum cup to become a poor waste product. Therefore, in the vacuum brazing process of the vacuum cup in the vacuum cup production industry, in the cooling stage, in order to ensure the quality of the vacuum cup, conservative cooling parameters are adopted, so that a very long cooling period is caused, even an active cooling device is not adopted, furnace cooling is adopted, so that brazing solder is solidified, the processing production efficiency is low, and only one furnace of vacuum cup can be brazed and processed in one working day or one half working day.
According to the production process provided by the invention, the cooling inert gas output from the air outlets is not directly blown to the welding area, and the cooling inert gas output from the air outlets flows to carry away high-temperature heat in the furnace chamber for cooling, so that the brazing solder is solidified more quickly and reasonably, and the temperature in the cooling furnace chamber is reduced more quickly in the following process; the cooling inert gas is prevented from being directly blown to the processed vacuum cup of the welding area to blow the brazing solder, the pressure change of the welding area caused by the fact that the cooling inert gas is directly blown to the welding area is avoided, the melting point of the brazing solder is reduced, and the time for the brazing solder to solidify is prolonged.
The realization that a plurality of air outlets output cooling inert gas and are not directly blown to a welding area is realized by arranging a side air outlet hood at the air outlet in the vacuum brazing equipment.
In the step S500, the inert gas is argon, the temperature of the argon is controlled to be 45 ℃, and the air pressure 85000pa of the argon blown out from the air outlet is controlled; and after the brazing solder is solidified, controlling the wind pressure of cooling argon blown out from the air outlet to be 130000pa, and discharging the brazing solder after the vacuum cup is cooled to 150-100 ℃ or below 100 ℃.
Through this kind of reasonable to brazing solder melting point temperature, when brazing solder still is in the molten liquid, the wind pressure that sets up the air outlet and blow off the argon gas is 85000pa, avoids because the too fast circulation of cooling argon gas leads to the interior temperature of furnace suddenly to drop, causes brazing solder internal stress too big, and the bore joint department ftractures. And after the brazing solder is solidified, continuously blowing cooling argon from the air outlet at the controlled air outlet with the air pressure of 130000pa until the temperature in the furnace chamber and the vacuum cup are cooled to 150-100 ℃ or below 100 ℃, and discharging the vacuum cup.
Preferably, the vacuum cup and the vacuum cup are cooled to 100 ℃ in the furnace chamber, and then the vacuum cup is taken out of the furnace, so that the heat radiation of high temperature to workers is reduced, and the physiological health of the workers is not comfortable; in order to reach more safety, the further harmful effects of avoiding product and air contact oxidation moreover, the cooling is rapid, shortens the time of leaving the stove of product cooling, makes things convenient for follow-up batch thermos cup product to continue to process.
In the traditional process flow, the temperature in the furnace chamber is cooled to the temperature of brazing solder for solidification, the period is very long, many technicians adopt the process that the temperature in the furnace chamber is cooled to 30-50 ℃ below the softening point of the brazing solder, the vacuum cup is cooled to 300-150 ℃ along with the furnace, then the vacuum cup is taken out of the furnace, the vacuum cup is cooled to 150 ℃ along with the furnace from below the softening point of the brazing solder, 6-7 hours are often needed, the process has low production efficiency, only one furnace of vacuum cup can be brazed and processed in one working day, the vacuum cup is cooled along with the furnace, the vacuum cup can be taken out of the furnace in the next day, and the utilization efficiency of the vacuum furnace is seriously influenced.
According to the production process provided by the invention, on the premise of ensuring the production and processing quality, through the way of adjusting the air pressure by cooling in stages, the production record statistics is carried out for multiple times, and by applying the production process, after the soldering flux seals and seals the welding hole of the welding seam, the furnace chamber and the processed product are cooled from 752 ℃ to 100 ℃, and the average time of use is 40 minutes; therefore, by utilizing the production process, a plurality of furnace batches of products can be produced by brazing within one working day, the utilization rate of the vacuum brazing furnace is greatly improved, and the production efficiency is greatly improved.
In the step S500, an external inert gas source is used to fill the furnace chamber with inert gas, the inert gas in the furnace chamber is pumped by a cooling device communicated with the furnace chamber to be cooled to 45 ℃, and then the cooled inert gas is output to the furnace chamber through an air outlet.
From the cooling inert gas of air outlet output, take off at the cooling device, carry away the indoor high temperature heat of stove, enter into the cooling device, cool down to 45 ℃ after, the inert gas through the cooling becomes cooling inert gas, enters into the stove room again and carries the indoor high temperature heat of stove and enter into the cooling device, so reciprocating cycle makes the stove temperature reach the predetermined temperature.
In the step S300, the heating temperature in the vacuum furnace is controlled to +10 to +30 ℃ which is the melting point temperature of the brazing filler metal, and the heating and heat preservation are stopped after 30 minutes of heat preservation.
In order to avoid the influence of comprehensive factors and avoid the situation that the brazing solder cannot be completely melted and liquefied when reaching the theoretical melting point, the yield is greatly improved by controlling the heating temperature in the vacuum furnace to be +10 ℃ to +30 ℃ of the melting point temperature of the brazing solder and preserving the heat for 30 minutes.
For example, a material is used as the brazing filler metal, the theoretical melting point temperature of the brazing filler metal is 510 ℃, and the brazing filler metal is heated to (510+10) DEG C to (510+30) DEG C, that is, 520 ℃ to 540 ℃ by controlling the heating temperature in the vacuum furnace to +10 ℃ to +30 ℃ which is the melting point temperature of the brazing filler metal.
In the step S200, a mechanical vacuum pump is used for vacuumizing the furnace chamber until the pressure in the furnace is 2000 Pa; preheating a diffusion pump; starting a roots pump to pump vacuum in the furnace chamber until the pressure in the furnace is high vacuum; the temperature of the diffusion pump reaches 245 ℃, the diffusion pump is started to pump the pressure in the furnace chamber from high vacuum to the pressure in the furnace of 6 multiplied by 10 -3 Pa。
Through the vacuum pump equipment of different grade type, to reaching different vacuum degrees, correspond the collocation and use, the process is reasonable.
The high vacuum is defined as when the vacuum degree in the furnace chamber is lower than 1.333X 10 -1 ～1.333×10 -6 Pa, it is called high vacuum.
In some embodiments, in step S500, after the temperature in the furnace chamber is reduced to-20 ℃ to-30 ℃ of the melting point temperature of the brazing solder, the wind pressure of the cooling argon blown out from the air outlet is controlled to be 130000pa, and the vacuum cup is cooled to 150 ℃ to 100 ℃ or below and then discharged.
For example, a material is used as the brazing filler metal having a theoretical melting point temperature of 510 ℃ and the temperature in the furnace chamber is lowered to-20 ℃ to-30 ℃ of the melting point temperature of the brazing filler metal by controlling to lower the temperature in the furnace chamber to (510-20) DEG C to (510-30) DEG C, that is, 490 ℃ to 480 ℃.
After the temperature in the furnace chamber is reduced to-20 to-30 ℃ of the melting point temperature of the brazing solder, the brazing solder is determined to be solidified and does not flow any more, and then the wind pressure of cooling argon blown out from the air outlet is increased, so that the circulation of the argon is accelerated, and the quicker cooling effect is achieved.
In step S400, inert gas is filled into the furnace chamber, and the pressure in the furnace chamber is adjusted to 130000 pa.
After the soldering flux of the heat preservation cup is in a molten liquid state and the through hole is sealed, the vacuum pump set is removed to continue vacuumizing to reduce energy consumption, inert gas is filled into the furnace chamber, and the pressure of the furnace chamber is adjusted to 130000 pa.
In the step S500, when the cooling inert gas in the furnace chamber and the welding zone is cooled, the inert gas is supplemented to the furnace chamber until the pressure of the furnace chamber is 130000pa when the cooling inert gas in the furnace chamber is less than 85000 pa.
Through the process steps, the phenomenon that the cooling effect is influenced due to insufficient air pressure in the furnace chamber is avoided, and the phenomenon that the quality of the product is influenced due to the fact that the vacuum cup product is oxidized by air in the furnace chamber due to the fact that the air is filled in the furnace chamber is avoided.
Thanks to the cooling process steps, the pressure of the inert gas in the furnace chamber needs to be kept at 130000pa optimally all the time, and the working time of corresponding equipment for keeping the pressure of the inert gas in the furnace chamber is shortened due to the shortened cooling time, so that the power consumption of the production applying the process is greatly reduced.
By applying the brazing production process, the cooling time is shortened, the processing efficiency is improved, the molten brazing solder is cooled to be solidified and finally discharged, the bad stress of the brazing solder is increased and reduced to be relatively lowest, and the sealing of the through holes are more reliable, so that the heat preservation effect of the vacuum cup produced by the process is greatly improved, and please refer to the comparative data in the following table.
Claims (10)
1. A vacuum brazing apparatus, comprising: the furnace comprises a furnace body, an air pressure regulating system, a heating system, a control system and a cooling system; a furnace chamber and an air charging and discharging interface which can be communicated with the furnace chamber are arranged in the furnace body; a welding area for arranging welded products is arranged in the furnace chamber; the heating system comprises a plurality of heating bodies arranged on the wall of the furnace chamber; the cooling system comprises a plurality of air outlets which are arranged on the wall of the furnace chamber and face the welding area, and side air outlet hoods which are correspondingly covered on the air outlets; the air pressure regulating system is used for regulating the pressure in the furnace chamber; the control system is electrically connected with the air pressure adjusting system, the heating system and the cooling system;
the side air outlet hood structure is a cylinder with an opening at one end and a closed end, a shunting cavity is arranged in the cylinder, and a side air outlet communicated with the shunting cavity is arranged on the side wall of the cylinder; the side air outlet hood encloses the air outlet in the shunting cavity through the opening.
2. A vacuum brazing apparatus according to claim 1, wherein:
the furnace body comprises an outer shell and an inner shell, the cooling system also comprises a cooling water channel arranged between the outer shell and the inner shell, a cooling water tower device arranged outside the furnace body and communicated with the cooling water channel, and a water flow meter group connected with the cooling water channel and the cooling water tower device;
the heating bodies are nickel-chromium resistance belts and are uniformly distributed along the wall of the furnace chamber;
the air outlets are uniformly distributed along the wall of the furnace chamber and are arranged with the heating body in a staggered mode at intervals;
the cooling system also comprises cooling equipment, a first connecting pipeline and a second connecting pipeline; one end of the first connecting pipeline is communicated with the furnace chamber, and the other end of the first connecting pipeline is communicated with the cooling equipment; one end of the second connecting pipeline is communicated with the cooling equipment, and the other end of the second connecting pipeline is communicated with the plurality of air outlets;
the air pressure adjusting system comprises a mechanical pump, a roots pump and a diffusion pump which are communicated with the furnace chamber.
3. A vacuum cup brazing production process is characterized by comprising the following process steps:
s100, placing a vacuum cup to be processed in a welding area in a vacuum furnace chamber, covering a furnace door and sealing the furnace chamber;
s200, vacuumizing a furnace chamber;
s300, controlling the heating temperature in the vacuum furnace until the brazing solder is molten and liquid to seal and plug the through hole of the vacuum cup, and stopping heating and preserving heat;
s400, stopping vacuum pumping, filling inert gas into the furnace chamber, and adjusting the pressure of the furnace chamber to be positive pressure;
s500, opening a plurality of air outlets arranged along the periphery of the welding area to output cooling inert gas, wherein the cooling inert gas output by the air outlets is not directly blown to the welding area, and discharging the vacuum cup from the furnace when the temperature in the furnace chamber is cooled to 150-100 ℃ or below 100 ℃.
4. A thermos cup brazing production process according to claim 3, wherein in the step S500, the inert gas is argon, the temperature of the argon is controlled to be 45 ℃, and the air pressure of the argon blown out from an air outlet is controlled to be 85000 pa; and after the brazing solder is solidified, controlling the wind pressure of cooling argon blown out from the air outlet to be 130000pa, and discharging the brazing solder after the vacuum cup is cooled to 150-100 ℃ or below 100 ℃.
5. A vacuum cup brazing production process according to claim 3, wherein in the step S500, inert gas is filled into the furnace chamber through an external inert gas source, the inert gas in the furnace chamber is extracted through a temperature reduction device communicated with the furnace chamber and is cooled to 45 ℃, and then the cooled inert gas is output to the furnace chamber through an air outlet.
6. A vacuum cup brazing production process according to claim 3, wherein in the step S300, after the heating temperature in the vacuum furnace is controlled to +10 ℃ to +30 ℃ of the melting point temperature of the brazing solder, the heating and the heat preservation are stopped after the heat preservation is carried out for 30 minutes.
7. A vacuum cup brazing production process according to claim 3, wherein in the step S200, a mechanical vacuum pump is used for vacuumizing the furnace chamber to 2000Pa in the furnace; preheating a diffusion pump; starting a roots pump to pump vacuum in the furnace chamber until the pressure in the furnace is high vacuum; the temperature of the diffusion pump reaches 245 ℃, the diffusion pump is started to pump the pressure in the furnace chamber from high vacuum to the pressure in the furnace of 6 multiplied by 10 -3 Pa。
8. A vacuum cup brazing production process according to claim 4, wherein after the temperature in the furnace chamber is reduced to-20 ℃ to-30 ℃ of the melting point temperature of brazing solder, the wind pressure of cooling argon blown out of the air outlet is controlled to be 130000pa, and the vacuum cup is cooled to 150 ℃ to 100 ℃ or below 100 ℃ and discharged.
9. A vacuum cup brazing production process according to claim 3, wherein in the step S400, inert gas is filled into the furnace chamber, and the furnace chamber pressure is adjusted to 130000 Pa.
10. A vacuum cup brazing process according to claim 3, wherein in said step S500, when the cooling inert gas in the furnace chamber is less than 85000Pa during the cooling of the welding zone, the inert gas is supplemented to the furnace chamber until the furnace chamber pressure is 130000 Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210657419.9A CN115090980A (en) | 2022-06-10 | 2022-06-10 | Vacuum brazing equipment and vacuum cup brazing production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210657419.9A CN115090980A (en) | 2022-06-10 | 2022-06-10 | Vacuum brazing equipment and vacuum cup brazing production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115090980A true CN115090980A (en) | 2022-09-23 |
Family
ID=83290974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210657419.9A Pending CN115090980A (en) | 2022-06-10 | 2022-06-10 | Vacuum brazing equipment and vacuum cup brazing production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115090980A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649188A (en) * | 2012-03-22 | 2012-08-29 | 金华市禾牧真空电子有限公司 | No-tail vacuum brazing furnace |
| CN104212951A (en) * | 2014-05-22 | 2014-12-17 | 北京华翔电炉技术有限责任公司 | Vacuum isothermal quenching furnace |
| CN105618884A (en) * | 2016-02-26 | 2016-06-01 | 沈阳广泰真空科技有限公司 | Horizontal type vacuum furnace for diamond particle brazing |
| CN106392248A (en) * | 2016-11-04 | 2017-02-15 | 天津航空机电有限公司 | Welding protection tool for vacuum atmosphere furnace |
| DE202017101405U1 (en) * | 2016-03-14 | 2017-06-19 | Iva Schmetz Gmbh | Vacuum furnace for joining components by brazing |
| CN110629134A (en) * | 2019-09-17 | 2019-12-31 | 西北电子装备技术研究所(中国电子科技集团公司第二研究所) | External circulation cooling type rapid gas quenching system of aluminum alloy vacuum brazing furnace |
| KR102101443B1 (en) * | 2019-01-23 | 2020-04-16 | 최윤종 | Method for brazing welding using a vacuum and metal product produced by the same |
| CN112872522A (en) * | 2021-01-11 | 2021-06-01 | 武汉倍普科技有限公司 | Reflow furnace temperature curve intelligent detection system |
-
2022
- 2022-06-10 CN CN202210657419.9A patent/CN115090980A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649188A (en) * | 2012-03-22 | 2012-08-29 | 金华市禾牧真空电子有限公司 | No-tail vacuum brazing furnace |
| CN104212951A (en) * | 2014-05-22 | 2014-12-17 | 北京华翔电炉技术有限责任公司 | Vacuum isothermal quenching furnace |
| CN105618884A (en) * | 2016-02-26 | 2016-06-01 | 沈阳广泰真空科技有限公司 | Horizontal type vacuum furnace for diamond particle brazing |
| DE202017101405U1 (en) * | 2016-03-14 | 2017-06-19 | Iva Schmetz Gmbh | Vacuum furnace for joining components by brazing |
| DE102016104684A1 (en) * | 2016-03-14 | 2017-09-14 | Iva Schmetz Gmbh | Method and vacuum furnace for joining components by brazing |
| CN106392248A (en) * | 2016-11-04 | 2017-02-15 | 天津航空机电有限公司 | Welding protection tool for vacuum atmosphere furnace |
| KR102101443B1 (en) * | 2019-01-23 | 2020-04-16 | 최윤종 | Method for brazing welding using a vacuum and metal product produced by the same |
| CN110629134A (en) * | 2019-09-17 | 2019-12-31 | 西北电子装备技术研究所(中国电子科技集团公司第二研究所) | External circulation cooling type rapid gas quenching system of aluminum alloy vacuum brazing furnace |
| CN112872522A (en) * | 2021-01-11 | 2021-06-01 | 武汉倍普科技有限公司 | Reflow furnace temperature curve intelligent detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109909506B (en) | Titanium alloy air inlet channel member hot isostatic pressing forming die and hot isostatic pressing forming method | |
| US6334569B1 (en) | Reflow soldering apparatus and reflow soldering method | |
| JP2021507813A (en) | Welding mechanism of vacuum welding furnace | |
| CN106799493A (en) | A kind of powder preheating device and its application for selective laser fusing powder feeding | |
| CN213856990U (en) | Die-casting mould for transportation equipment | |
| CN117718556A (en) | Chip packaging welding vacuum furnace and transmission method thereof | |
| CN115090980A (en) | Vacuum brazing equipment and vacuum cup brazing production process | |
| CN102522343A (en) | Microcomponent vacuum packaging exhaust device and method | |
| CN102515571A (en) | Method for sealing metal and glass in mismatching way | |
| CN106270434A (en) | A kind of novel amorphous master alloy ingot continuous casting system and using method thereof | |
| CN216802017U (en) | Hot air on-line vacuum welding furnace | |
| CN215034283U (en) | Air charging and exhausting cooling device of vertical vacuum brazing furnace | |
| CN1113713C (en) | Continuous casting process and continuous casting machine | |
| CN112553620B (en) | Gas protection cover device for laser cladding coaxial powder feeding gun | |
| CN111524821A (en) | Eutectic welding platform and eutectic welding method for microwave chip | |
| CN221087595U (en) | Vacuum diffusion welding equipment | |
| CN111745253A (en) | Soldering device and method with low bubble generation rate for semiconductor package | |
| CN111992693A (en) | Vacuum suction casting method and device for high-manganese damping alloy fired mold | |
| CN117583682A (en) | Vacuum sintering device and method for pump source chip | |
| CN215033599U (en) | Vibrating table for compaction of powder filling sheath | |
| CN106222590B (en) | A kind of annealing process for suppressing silumin weld cracking | |
| CN112207514B (en) | Brazing filler metal supplementing method for repairing bulge defect of thin-wall component | |
| CN209947786U (en) | Sealing mould for electric arc tube of gas discharge lamp | |
| CN210188795U (en) | Pipe shell sealing and welding machine with vacuum oven | |
| CN203222631U (en) | Vacuum water-cooling cavity body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |