A high-efficiency positive and negative pressure welding vacuum furnace

Abstract

The utility model relates to the technical field of welding vacuum furnaces, and specifically to a high-efficiency positive and negative pressure welding vacuum furnace, comprising a furnace body, a welding chamber is arranged in the furnace body, a heating plate is arranged in the welding chamber, the welding chamber is connected with a vacuum system, a reducing atmosphere system, a circulating cooling system, and a control system, the reducing atmosphere system comprises a reducing air pipe, a reducing atmosphere control module, the reducing air pipe is connected with a dispersed air pipe, air outlet holes are arranged at intervals on the dispersed air pipe, the circulating cooling system comprises a circulating water pipe passing through the heating plate, a plurality of heating pipes are arranged through the heating plate, the heating pipes are connected with electrodes and transformers in sequence, and some of the electrodes pass through the circulating water pipe. The utility model has the following beneficial effects: the dispersed air pipe is arranged to make the reducing gas evenly distributed; when cooling, the circulating water pipe passes through the heating plate to quickly cool the heating plate; when heating, the electrode passes through the circulating water pipe, and heat can be conducted through the circulating water pipe during heating, so that the heating plate is heated more evenly.

Description

Technical Field

[0001] The utility model relates to the technical field of welding vacuum furnaces, in particular to a high-efficiency positive and negative pressure welding vacuum furnace. Background Art

[0002] The welding vacuum furnace is a system designed for small-batch production and R&D. It is also called a vacuum reflow oven or a micro eutectic furnace. It is a process welding furnace for high-end products, such as laser devices, aerospace, electric vehicles and other industries. It can perform high-quality welding on products in a vacuum environment. Reducing gas (N2, formic acid, N2H2, H2) is introduced during the heating or cooling process to protect the product and solder from oxidation. At the same time, the oxides on the surface of the product and solder react to improve the quality of the welding surface, thereby reducing the void rate of the welding.

[0003] When the existing welding vacuum furnace is performing welding operations, the reducing gas is unevenly distributed, which affects the welding quality. After welding is completed, the cooling speed is slow, which affects the welding efficiency. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a rapid curing device for producing polyurea materials, which is used to solve the problems of uneven distribution of reducing gas and slow cooling after welding.

[0005] To solve the above problems, the technical solution of the utility model is as follows: a high-efficiency positive and negative pressure welding vacuum furnace, comprising a furnace body, a welding chamber is arranged in the furnace body, the welding chamber comprises a sealing cover arranged at the top, a heating plate for placing solder is arranged in the welding chamber, the welding chamber is connected to a vacuum system, a reducing atmosphere system, and a circulating cooling system; the reducing atmosphere system comprises a reducing air pipe passing through the welding chamber, and a reducing atmosphere control module arranged in the furnace body, the reducing air pipe is connected to a dispersed air pipe, air outlet holes are arranged at intervals on the dispersed air pipe, and also includes a control system electrically connected to the vacuum system, the reducing atmosphere system, the circulating cooling system, and the welding chamber.

[0006] Furthermore, the circulating cooling system comprises a circulating water pipe passing through the heating plate, and two ends of the circulating water pipe are respectively connected to a water inlet pipe and a water outlet pipe.

[0007] Furthermore, a plurality of heating tubes are provided through the heating plate, and the heating tubes are connected with electrodes and transformers in sequence, and some of the electrodes pass through the circulating water pipe.

[0008] Furthermore, the vacuum system includes a vacuum tube with one end connected to the welding chamber, and the vacuum tube is connected to a vacuum pump arranged in the furnace body.

[0009] Furthermore, a support frame is provided at the bottom of the heating plate for supporting.

[0010] Furthermore, the heating plate is made of red copper with a chrome-plated surface.

[0011] Furthermore, an acid tank connected to the reducing atmosphere system is provided in the furnace body.

[0012] Furthermore, a temperature detection module is provided in the welding chamber, and the temperature detection module is provided on the upper surface of the heating plate and in the circulating water pipe.

[0013] Compared with the prior art, the utility model has the following beneficial effects: a dispersed gas pipe is provided to evenly distribute the reducing gas; when cooling, the circulating water pipe passes through the heating plate to quickly cool the heating plate; when heating, the electrode passes through the circulating water pipe, and heat can be conducted through the circulating water pipe during heating, so that the heating plate is heated more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of each system inside the utility model;

[0015] Figure 2 It is a three-dimensional diagram of the internal structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the welding chamber of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the heating plate of the utility model;

[0018] Figure 5 This is a schematic diagram of the appearance of the utility model.

[0019] Description of the drawings: 1 furnace body, 2 welding chamber, 3 sealing cover, 4 heating plate, 5 support frame, 6 reducing air pipe, 7 reducing atmosphere control module, 8 dispersed air pipe, 9 air outlet, 10 circulating water pipe, 11 water inlet pipe, 12 water outlet pipe, 13 heating pipe, 14 electrode, 15 transformer, 16 vacuum tube, 17 vacuum pump, 18 acid tank, 19 copper busbar. DETAILED DESCRIPTION

[0020] like Figure 1 , Figure 2 , Figure 5 As shown, a high-efficiency positive and negative pressure welding vacuum furnace comprises a furnace body 1, and a welding chamber 2 is arranged in the furnace body 1. Figure 3 , Figure 4As shown, the welding chamber 2 includes a sealing cover 3 arranged on the top, the sealing cover 3 is rotatably connected to the furnace body 1, and can be fixed by a nitrogen spring and a fixing rod. A heating plate 4 for placing solder is provided in the welding chamber 2. The heating plate 4 is made of red copper and has a chrome-plated surface. A supporting frame 5 for support is provided at the bottom of the heating plate 4. The welding chamber 2 is connected to a vacuum system, a reducing atmosphere system, and a circulating cooling system, and also includes a control system electrically connected to the vacuum system, the reducing atmosphere system, the circulating cooling system, and the welding chamber.

[0021] The reducing atmosphere system includes a reducing gas pipe 6 passing through the welding chamber 2, and a reducing atmosphere control module 7 arranged in the furnace body 1. The reducing atmosphere control module 7 is a prior art, including a pneumatic diaphragm valve, a mass flow meter, a pressure reducing valve, a gas source processing triplet, etc. The reducing gas pipe 6 is connected to a dispersed gas pipe 8, and the dispersed gas pipe 8 is provided with gas outlet holes 9 at intervals.

[0022] The circulating cooling system includes a circulating water pipe 10 passing through the heating plate 4 , and two ends of the circulating water pipe 10 are respectively connected to a water inlet pipe 11 and a water outlet pipe 12 .

[0023] like Figure 4 As shown, a plurality of heating tubes 13 are provided through the heating plate 4, and the heating tubes 13 are connected with electrodes 14 and transformers 15 in sequence. The electrodes 14 and the heating tubes 13 can be connected through a copper bus 19, and some electrodes 14 pass through the circulating water pipe 10. When heating, the circulating water pipe 10 is heated, so that the heating plate 4 is heated evenly. After welding is completed, the circulating water pipe 10 passes through the heating tube 13 to quickly take away the heat and quickly cool down.

[0024] The vacuum system includes a vacuum tube 16 whose one end is connected to the welding chamber 2 , and the vacuum tube 16 is connected to a vacuum pump 17 arranged in the furnace body 1 .

[0025] An acid tank 18 connected to the reducing atmosphere system is provided in the furnace body 1 .

[0026] A temperature detection module is provided in the welding chamber 2, and the temperature detection module is arranged on the upper surface of the heating plate and in the circulating water pipe.

[0027] When in use, the solder is placed on the heating plate 4. During negative pressure welding, the control system controls the electrode 14 and the heating tube 13 to heat the heating plate 4. By heating the circulating water pipe 10, the heating is made more uniform. After stabilization, the control system controls the vacuum pump 17 to operate and evacuate. The evacuation reaches a certain vacuum degree, that is, less than 100 mbar. The control system controls the reducing atmosphere control module 7 and then fills with nitrogen (reducing gas). However, the vacuum degree is still carried out under negative pressure. The bubbles in the solder are discharged as much as possible. The welding is completed under the reducing atmosphere. The circulating water pipe 10 passes through the heating tube 13 to quickly take away the heat and quickly cool down. The welding void rate is greatly reduced. For positive pressure welding, after the temperature is stabilized, nitrogen is filled to a certain set positive pressure value, that is, higher than 100 mbar, and then welding is carried out. The temperature, time, and vacuum degree are displayed on the panel of the control system. When operating, just operate according to the control panel.

[0028] The above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A high-efficiency positive and negative pressure welding vacuum furnace, comprising a furnace body, characterized in that: A welding chamber is provided in the furnace body, the welding chamber includes a sealing cover arranged at the top, a heating plate for placing solder is provided in the welding chamber, the welding chamber is connected to a vacuum system, a reducing atmosphere system, and a circulating cooling system; the reducing atmosphere system includes a reducing gas pipe passing through the welding chamber, and a reducing atmosphere control module arranged in the furnace body, the reducing gas pipe is connected to a dispersed gas pipe, the dispersed gas pipe is provided with gas outlet holes at intervals, and also includes a control system electrically connected to the vacuum system, the reducing atmosphere system, the circulating cooling system, and the welding chamber.

2. The welding vacuum furnace according to claim 1, characterized in that: The circulating cooling system comprises a circulating water pipe passing through the heating plate, and two ends of the circulating water pipe are respectively connected to a water inlet pipe and a water outlet pipe.

3. The welding vacuum furnace according to claim 2, characterized in that: A plurality of heating tubes are arranged through the heating plate, and the heating tubes are connected with electrodes and transformers in sequence, and some of the electrodes pass through the circulating water pipe.

4. The welding vacuum furnace according to claim 3, characterized in that: The vacuum system comprises a vacuum tube with one end connected to the welding chamber, and the vacuum tube is connected to a vacuum pump arranged in the furnace body.

5. The welding vacuum furnace according to claim 4, characterized in that: A support frame for supporting is arranged at the bottom of the heating plate.

6. The welding vacuum furnace according to claim 1, characterized in that: The heating plate is made of red copper with chrome-plated surface.

7. The welding vacuum furnace according to claim 3, characterized in that: An acid tank connected to the reducing atmosphere system is arranged in the furnace body.

8. The welding vacuum furnace according to claim 2, characterized in that: A temperature detection module is arranged in the welding room. The temperature detection module is arranged on the upper surface of the heating plate and in the circulating water pipe.

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