WO2017140009A1 - 连续真空氮气保护钎焊炉 - Google Patents

连续真空氮气保护钎焊炉 Download PDF

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Publication number
WO2017140009A1
WO2017140009A1 PCT/CN2016/076370 CN2016076370W WO2017140009A1 WO 2017140009 A1 WO2017140009 A1 WO 2017140009A1 CN 2016076370 W CN2016076370 W CN 2016076370W WO 2017140009 A1 WO2017140009 A1 WO 2017140009A1
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furnace
vacuum
nitrogen
brazing
pipe
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PCT/CN2016/076370
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English (en)
French (fr)
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吴文杰
王伟
纪冬
史定春
吴进
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江苏康杰机械股份有限公司
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Publication of WO2017140009A1 publication Critical patent/WO2017140009A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—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
    • B23K3/08—Auxiliary devices therefor
    • 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
    • B23K2101/14—Heat exchangers
    • 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
    • B23K2103/10—Aluminium or alloys thereof

Definitions

  • the invention relates to a brazing furnace, in particular to a continuous vacuum nitrogen protection brazing furnace.
  • the brazing furnace is a device that effectively connects the components of the aluminum heat exchanger. It is welded by the characteristic that the melting point of the alloy of the brazing material is lower than the melting point of the metal material.
  • the brazing material is usually placed near or inside the welding surface where the joint is required, and the aluminum brazing flux is applied between the component and the welding surface and the surface is heated under the protection of a certain inert gas until the brazing alloy melts and the component metal does not melt. temperature.
  • the brazing agent breaks the oxide film of the metal material and causes surface diffusion between the molten metal and the infusible metal. After cooling, the brazing metal forms a metal bond with the contact surface of the component.
  • the structure of the existing brazing furnace mainly comprises: a frame and a chain circulating conveying device arranged on the frame, wherein the upper part, the drying furnace, the preheating furnace and the brazing are arranged in order from the front to the rear of the frame In the furnace, the forced air cooling zone and the lower part zone, a preheating furnace nitrogen pipe is arranged on the preheating furnace, and a brazing furnace nitrogen pipe is arranged on the brazing furnace.
  • the existing brazing furnace is working, the workpiece to be brazed is placed in the upper part of the upper part, transported by the chain circulation conveying device, dried in the drying furnace, then enters the preheating furnace for preheating, and then enters the brazing furnace.
  • the brazing furnace After the brazing is completed, enters the forced air cooling zone to cool, and then enters the lower part of the lower part.
  • the workpiece In the preheating furnace and the brazing furnace, the workpiece is easily oxidized due to the high temperature.
  • the preheating furnace is filled with nitrogen gas through the preheating furnace nitrogen tube, so that the preheating furnace is filled with nitrogen gas to prevent the workpiece from being preheated.
  • High temperature oxidation in the hot furnace; in the brazing process the brazing furnace is filled with nitrogen gas through the brazing furnace nitrogen tube, so that the brazing furnace is filled with nitrogen gas to prevent the workpiece from being oxidized at a high temperature in the brazing furnace.
  • the existing brazing furnace does not reach the nitrogen concentration in the process of the drying furnace entering the preheating furnace.
  • the workpiece with high temperature is still easy to oxidize, affecting the brazing effect, and enters from the brazing furnace after the brazing of the workpiece is completed.
  • the concentration of nitrogen in the process of forced air cooling zone is still not reached, the temperature Higher workpieces are still susceptible to oxidation and affect the brazing effect.
  • the technical problem to be solved by the present invention is to provide a continuous vacuum nitrogen protection brazing furnace with low energy consumption and good brazing effect.
  • a continuous vacuum nitrogen protection brazing furnace comprising: a frame and a chain circulating conveying device arranged on the frame, which are arranged in order from front to back on the frame There is an upper part zone, a drying furnace, a preheating furnace, a brazing furnace, a forced air cooling zone and a lower part zone, wherein the preheating furnace is provided with a preheating furnace nitrogen pipe, and the brazing furnace is provided with brazing a nitrogen gas pipe of the welding furnace, a vacuum purification zone is disposed on the frame between the drying furnace and the preheating furnace, and a vacuum pipe of a vacuum purification zone and a vacuum pipe of a vacuum purification zone are respectively disposed on the vacuum purification zone; a vacuum purification cooling zone is disposed on the frame between the brazing furnace and the forced air cooling zone, and a vacuum purification cooling zone nitrogen pipe and a vacuum purification cooling zone vacuuming pipe are respectively disposed on the vacuum purification cooling zone
  • the invention has the advantages that: in the above aluminum brazing furnace, a vacuum purification zone is arranged between the drying furnace and the preheating furnace, and the vacuum purification zone is a transition zone between the drying furnace and the preheating furnace, and the vacuum purification zone is closed Vacuuming and nitrogen filling, the pressure in the transition zone is similar to the pressure in the preheating furnace, ensuring that the atmosphere of the entire inner cavity maintains a pure nitrogen level when the product is delivered from the vacuum purification zone to the preheating furnace; A vacuum purification cooling zone is arranged between the forced air cooling zone and the vacuum purification cooling zone is a transition zone between the brazing furnace and the forced air cooling zone, and the vacuum purification cooling zone is closed, vacuumed, and filled with nitrogen to make a transition.
  • the pressure in the zone is similar to the pressure in the brazing furnace.
  • the atmosphere of the entire cavity maintains a pure nitrogen level; the workpiece is not oxidized during the preheating and brazing process.
  • FIG. 1 is a schematic view showing the structure of a continuous vacuum nitrogen protection brazing furnace of the present invention.
  • FIG. 2 is a schematic plan view of the top view of FIG. 1.
  • the continuous vacuum nitrogen protection brazing furnace comprises: a frame 1 and a chain circulating conveying device 2 disposed on the frame 1, and the frame 1 is arranged in order from front to back.
  • the upper part 3, the drying furnace 4, the preheating furnace 5, the brazing furnace 6, the forced air cooling zone 7 and the lower part area 8, on the preheating furnace 5, a preheating furnace nitrogen pipe 9 is provided,
  • the brazing furnace 6 is provided with a brazing furnace nitrogen pipe 10, and a vacuum purifying zone 11 is disposed on the frame 1 between the drying furnace 4 and the preheating furnace 6, and the vacuum purifying zone 11 is respectively provided with a vacuum purification zone nitrogen pipe 12 and a vacuum purification zone evacuation pipe 13;
  • a vacuum purification cooling zone 14 is disposed on the frame 1 between the brazing furnace 6 and the forced air cooling zone 7, in the vacuum purification cooling zone 14
  • the vacuum purification cooling zone nitrogen pipe 15 and the vacuum purification cooling zone vacuum pipe 16 are respectively disposed, the preheating furnace nitrogen pipe 9, the brazing furnace nitrogen pipe 10, the vacuum
  • the workpiece 17 to be brazed is placed in the upper part 3, transported by the chain circulation conveying device 2, dried in the drying furnace 4, and then entered into the preheating furnace 5 for pre-preparation. Heat, then enter the brazing furnace 6 for brazing, after the brazing is completed, enter the forced air cooling zone 7 to cool, and then enter the lower part of the lower part 8 .
  • a vacuum purification zone 11 is disposed between the drying furnace 4 and the preheating furnace 5, and the vacuum purification zone 11 is a transition zone between the drying furnace 4 and the preheating furnace 5, and passes through the vacuum purification zone.
  • the furnace door 18 on both sides closes the vacuum purification zone 11, vacuums through the vacuum purification zone evacuation pipe 13, and purifies the nitrogen gas through the vacuum purification zone nitrogen pipe 12, so that the pressure in the transition zone and the pressure in the preheating furnace 5 Approximate, when the product is delivered from the vacuum purification zone 11 to the preheating furnace 5, the atmosphere of the entire inner cavity maintains a pure nitrogen level, preventing the workpiece 17 from being oxidized at a high temperature, thereby reducing the charging of the preheating furnace nitrogen pipe 9 into the preheating furnace 5.
  • a vacuum purification cooling zone 14 is provided between the brazing furnace 6 and the forced air cooling zone 7, and the vacuum purification cooling zone 14 is a transition zone between the brazing furnace 6 and the forced air cooling zone 7, and is vacuum-purified.
  • the cooling zone 14 is closed, vacuum is evacuated through the vacuum purification cooling zone 16 , and the nitrogen pipe 15 is vacuum-purified in the vacuum purification zone to make the pressure in the transition zone approximate to the pressure in the brazing furnace 6 to ensure the brazing furnace.
  • 6-way vacuum purification cooling zone 14 When feeding the product, pure nitrogen atmosphere is maintained throughout the lumen level, preventing high temperature oxidation of the workpiece 17, thereby reducing a nitrogen furnace brazing nitrogen gas pipe 10 into the brazing furnace 6.

Abstract

一种能耗低钎焊效果好的连续真空氮气保护钎焊炉，包括：机架（1）和设置在机架（1）上的链式循环输送装置（2），在机架（1）上从前至后依次设置有上件区（3）、干燥炉（4）、预热炉（5）、钎焊炉（6）、强制风冷区（7）和下件区（8），在预热炉（5）上设置有预热炉氮气管（9），在钎焊炉（6）上设置有钎焊炉氮气管（10），在干燥炉（4）与预热炉（6）之间的机架（1）上设置有真空净化区（11），在真空净化区（11）上分别设置有真空净化区氮气管（12）和真空净化区抽真空管（13）；在钎焊炉（6）与强制风冷区（7）之间的机架（1）上设置有真空净化冷却区（14），在真空净化冷却区（14）上分别设置有真空净化冷却区氮气管（15）和真空净化冷却区抽真空管（16），预热炉氮气管（9）、钎焊炉氮气管（10）、真空净化区氮气管（12）和真空净化冷却区氮气管（15）分别与氮气供气装置相连接，真空净化区抽真空管（13）和空净化冷却区抽真空管（16）分别与抽真空装置相连接。

Description

连续真空氮气保护钎焊炉 技术领域
本发明涉及到一种钎焊炉，尤其涉及一种连续真空氮气保护钎焊炉。
背景技术
钎焊炉是将铝热交换器各零部件进行有效连接的一种设备。是利用钎料的合金熔点低于金属材料的熔点这一特性进行焊接的。钎料通常置于需要连接部位的焊接面附近或里面，在部件与焊接面之间及表面涂有铝钎焊剂，部件在一定的惰性气体保护下加热至钎焊合金熔融而部件金属不融化的温度。钎焊剂打破金属材料的氧化膜，让其熔融金属与不熔化的金属之间进行表面扩散，冷却后，钎料金属就会与部件接触面之间形成金属结合。
现有钎焊炉的结构主要包括：机架和设置在机架上的链式循环输送装置，在所述机架上从前至后依次设置有上件区、干燥炉、预热炉、钎焊炉、强制风冷区和下件区，在所述预热炉上设置有预热炉氮气管，在所述钎焊炉上设置有钎焊炉氮气管。现有钎焊炉工作时，需要进行钎焊的工件在上件区上件，通过链式循环输送装置输送，进入干燥炉进行干燥，然后进入预热炉进行预热，然后进入钎焊炉进行钎焊，钎焊完成后进入强制风冷区冷却，然后进入下件区下件。在预热炉和钎焊炉内由于温度较高，工件容易氧化，在预热过程中通过预热炉氮气管向预热炉内充入氮气，使预热炉内充满氮气，防止工件在预热炉内高温氧化；在钎焊过程中通过钎焊炉氮气管向钎焊炉内充入氮气，使钎焊炉内充满氮气，防止工件在钎焊炉内高温氧化。如果想到达到预热炉和钎焊炉内更高的氮气浓度，就需要在预热和钎焊过程中不断的充入大量的氮气，氮气消耗较大，能耗高，使用成本大。但是现有的钎焊炉在干燥炉进入预热炉内的过程中氮气浓度还是达不到，温度较高工件还是容易氧化，影响钎焊效果，同时在工件钎焊完成后从钎焊炉进入强制风冷区的过程中氮气浓度还是达不到，温度 较高工件还是容易氧化，影响钎焊效果。
发明内容
本发明所要解决的技术问题是：提供一种能耗低钎焊效果好的连续真空氮气保护钎焊炉。
为了解决上述技术问题，本发明采用的技术方案是：连续真空氮气保护钎焊炉，包括：机架和设置在机架上的链式循环输送装置，在所述机架上从前至后依次设置有上件区、干燥炉、预热炉、钎焊炉、强制风冷区和下件区，在所述预热炉上设置有预热炉氮气管，在所述钎焊炉上设置有钎焊炉氮气管，在所述干燥炉与预热炉之间的机架上设置有真空净化区，在所述真空净化区上分别设置有真空净化区氮气管和真空净化区抽真空管；在所述钎焊炉与强制风冷区之间的机架上设置有真空净化冷却区，在所述真空净化冷却区上分别设置有真空净化冷却区氮气管和真空净化冷却区抽真空管，所述的预热炉氮气管、钎焊炉氮气管、真空净化区氮气管和真空净化冷却区氮气管分别与氮气供气装置相连接，所述的真空净化区抽真空管和空净化冷却区抽真空管分别与抽真空装置相连接。
本发明的优点是：上述铝钎焊炉，在干燥炉与预热炉之间设置有真空净化区，真空净化区为干燥炉与预热炉之间的过渡区，通过对真空净化区进行封闭、抽真空、充氮气，使过渡区内的压力与预热炉内的压力相近似，保证从真空净化区向预热炉输送产品时，整个内腔的气氛保持纯氮水平；在钎焊炉与强制风冷区之间设置有真空净化冷却区，真空净化冷却区为钎焊炉与强制风冷区之间的过渡区，通过对真空净化冷却区进行封闭、抽真空、充氮气，使过渡区内的压力与钎焊炉内的压力相近似，保证从钎焊炉向真空净化冷却区输送产品时，整个内腔的气氛保持纯氮水平；保证预热和钎焊过程中工件不会氧化，保证钎焊效果和钎焊质量，节约氮气消耗，使用成本降低，使用更加安全。
附图说明
图1为本发明连续真空氮气保护钎焊炉的结构示意图。
图2为图1的俯视结构示意图。
图中：1、机架，2、链式循环输送装置，3、上件区，4、干燥炉，5、预热炉，6、钎焊炉，7、强制风冷区，8、下件区，9、预热炉氮气管，10、钎焊炉氮气管，11、真空净化区，12、真空净化区氮气管，13、真空净化区抽真空管，14、真空净化冷却区，15、真空净化冷却区氮气管，16、真空净化冷却区抽真空管，17、工件，18、炉门。
具体实施方式
下面结合附图和具体实施例详细描述一下本发明的具体内容。
如图1、图2所示，连续真空氮气保护钎焊炉，包括：机架1和设置在机架1上的链式循环输送装置2，在所述机架1上从前至后依次设置有上件区3、干燥炉4、预热炉5、钎焊炉6、强制风冷区7和下件区8，在所述预热炉5上设置有预热炉氮气管9，在所述钎焊炉6上设置有钎焊炉氮气管10，在所述干燥炉4与预热炉6之间的机架1上设置有真空净化区11，在所述真空净化区11上分别设置有真空净化区氮气管12和真空净化区抽真空管13；在所述钎焊炉6与强制风冷区7之间的机架1上设置有真空净化冷却区14，在所述真空净化冷却区14上分别设置有真空净化冷却区氮气管15和真空净化冷却区抽真空管16，所述的预热炉氮气管9、钎焊炉氮气管10、真空净化区氮气管12和真空净化冷却区氮气管15分别与氮气供气装置相连接，所述的真空净化区抽真空管13和空净化冷却区抽真空管16分别与抽真空装置相连接。
上述连续真空氮气保护钎焊炉工作时，需要进行钎焊的工件17在上件区3上件，通过链式循环输送装置2输送，进入干燥炉4进行干燥，然后进入预热炉5进行预热，然后进入钎焊炉6进行钎焊，钎焊完成后进入强制风冷区7冷却，然后进入下件区8下件。
在工件17在从干燥炉4进入预热炉5的过程中，以及在工件17通过钎焊炉6进入强制风冷区7的过程中，由于温度较高，工件17容易氧化。
上述连续真空氮气保护钎焊炉，在干燥炉4与预热炉5之间设置有真空净化区11，真空净化区11为干燥炉4与预热炉5之间的过渡区，通过真空净化区11两侧的炉门18对真空净化区11进行封闭、通过真空净化区抽真空管13抽真空、通过真空净化区氮气管12充氮气，使过渡区内的压力与预热炉5内的压力相近似，保证从真空净化区11向预热炉5输送产品时，整个内腔的气氛保持纯氮水平，防止工件17高温氧化，从而减少利用预热炉氮气管9向预热炉5内的充氮气量；在钎焊炉6与强制风冷区7之间设置有真空净化冷却区14，真空净化冷却区14为钎焊炉6与强制风冷区7之间的过渡区，通过对真空净化冷却区14进行封闭、通过真空净化冷却区抽真空管16抽真空、通过真空净化冷却区氮气管15充氮气，使过渡区内的压力与钎焊炉6内的压力相近似，保证从钎焊炉6向真空净化冷却区14输送产品时，整个内腔的气氛保持纯氮水平，防止工件17高温氧化，从而减少利用钎焊炉氮气管10向钎焊炉6内的充氮气量。
上述实施例仅供说明本发明之用，而并非是对本发明的限制，本领域技术人员在不脱离本发明保护范围的情况下，还可以作出各种变化和变型，所有与本发明相同或相似的技术方案也应属于本发明的保护范畴。

Claims (1)

  1. 连续真空氮气保护钎焊炉，包括：机架(1)和设置在机架(1)上的链式循环输送装置(2)，在所述机架(1)上从前至后依次设置有上件区(3)、干燥炉(4)、预热炉(5)、钎焊炉(6)、强制风冷区(7)和下件区(8)，在所述预热炉(5)上设置有预热炉氮气管(9)，在所述钎焊炉(6)上设置有钎焊炉氮气管(10)，其特征在于：在所述干燥炉(4)与预热炉(6)之间的机架(1)上设置有真空净化区(11)，在所述真空净化区(11)上分别设置有真空净化区氮气管(12)和真空净化区抽真空管(13)；在所述钎焊炉(6)与强制风冷区(7)之间的机架(1)上设置有真空净化冷却区(14)，在所述真空净化冷却区(14)上分别设置有真空净化冷却区氮气管(15)和真空净化冷却区抽真空管(16)，所述的预热炉氮气管(9)、钎焊炉氮气管(10)、真空净化区氮气管(12)和真空净化冷却区氮气管(15)分别与氮气供气装置相连接，所述的真空净化区抽真空管(13)和空净化冷却区抽真空管(16)分别与抽真空装置相连接。
PCT/CN2016/076370 2016-02-19 2016-03-15 连续真空氮气保护钎焊炉 WO2017140009A1 (zh)

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