Vacuum tube brazing furnace

Abstract

The utility model provides a kind of vacuum tube type brazing furnace, belong to the technical field of vacuum tube type brazing furnace, including the left side hinged sealing furnace door of tubular brazing furnace body, the left side fixed handle of sealing furnace door.The utility model is composed of mechanical pump, molecular pump and corresponding valve by vacuum system, by reasonable pipeline connection, mechanical pump, molecular pump can be realized for multi-station service, improve the sharing degree and utilization efficiency of pump and other vacuum system equipment, avoid resource waste, can provide ideal vacuum environment for relevant welding work, effectively avoid the oxidation of welded component in welding process and other problems, to guarantee welding quality, the utility model can effectively provide vacuum brazing function, use as little mechanical pump, molecular pump to achieve the purpose of reducing cost, efficient use of equipment, the number of mechanical pump, molecular pump and corresponding valve can be adjusted according to the number of station, but system basic structure and principle are unchanged.

Description

Technical Field

[0001] This utility model belongs to the technical field of vacuum tube brazing furnaces, and specifically relates to a vacuum tube brazing furnace. Background Technology

[0002] A brazing furnace is a device used for brazing and bright heat treatment of metals. It is suitable for mass production of small and medium-sized stainless steel parts (tableware, knives, hardware, etc.), such as bright quenching and tempering of martensitic stainless steel and bright annealing of austenitic stainless steel.

[0003] Vacuum tube brazing furnaces are specifically designed for precision welding of oxidation-sensitive or high-cleanliness environments. The vacuum system of this furnace generally consists of mechanical pumps, molecular pumps, and corresponding valves. Different pumps have different operating conditions and operating periods. Therefore, how to share and efficiently utilize mechanical pumps and molecular pumps to serve multiple workstations and minimize the risk of workstation conflicts urgently needs to be studied. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum tube brazing furnace, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A vacuum tube brazing furnace includes a sealed furnace door hinged to the left side of the furnace body, a handle fixed to the left side of the sealed furnace door, a controller fixedly installed on the outer surface of the furnace body, three sets of heaters arranged in the inner cavity of the furnace body, a work platform fixed at the bottom of the inner cavity of the furnace body, a main pipeline connected to the right side of the furnace body, a high vacuum gauge connected to the top of the main pipeline, a molecular pump connected to the bottom of the main pipeline via a connecting pipe, a pre-stage valve connected to the bottom of the molecular pump via a connecting pipe, a mechanical pump connected to the bottom of the pre-stage valve via a connecting pipe, a bypass valve connected to the right side of the mechanical pump via a connecting pipe, a ball valve connected to the top of the bypass valve via a connecting pipe, a fine-tuning valve connected to the other end of the bottom of the main pipeline via a connecting pipe, and a venting valve connected to the bottom of the fine-tuning valve via a connecting pipe.

[0007] As a preferred embodiment of this utility model, a hinge is fixedly installed on the rear side of the sealed furnace door, and the hinge is fixedly installed on the surface of the tubular brazing furnace body. Through the hinge structure, it is ensured that the sealed furnace door and the tubular brazing furnace body are tightly fitted to avoid vacuum leakage and maintain a clean environment inside the furnace.

[0008] As a preferred embodiment of this utility model, the surface of the tubular brazing furnace body is respectively provided with a display screen and operation buttons. The display screen displays key parameters such as temperature and vacuum degree in real time, and the operation buttons provide centralized control, reducing the risk of misoperation.

[0009] As a preferred embodiment of this utility model, the workstation supports the design of two or more workstations, and through multi-workstation parallel processing, it is suitable for batch welding, such as electronic components, precision metal parts, etc.

[0010] As a preferred embodiment of this utility model, the workbench can be equipped with a graphite fixture to prevent contamination caused by contact with the brazing filler metal. The graphite material is resistant to high temperatures and brazing filler metal wetting, thus preventing the brazing filler metal from sticking to and contaminating the workpiece during the welding process.

[0011] In a preferred embodiment of this invention, the top of the ball valve is connected to the bottom of the main pipeline via a connecting pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the vacuum system consists of a mechanical pump, a molecular pump and corresponding valves. Through reasonable pipeline connection, the mechanical pump and molecular pump can serve multiple workstations, which improves the sharing and utilization efficiency of vacuum system equipment such as pumps, avoids resource waste, provides an ideal vacuum environment for related welding work, effectively avoids oxidation and other problems of the welded components during the welding process, and thus ensures welding quality.

[0013] This invention can effectively provide vacuum brazing functionality, using as few mechanical pumps and molecular pumps as possible to reduce costs and make efficient use of equipment. The number of mechanical pumps, molecular pumps and corresponding valves can be adjusted according to the number of workstations, but the basic structure and principle of the system remain unchanged. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a three-dimensional schematic diagram of the rear view structure of this utility model;

[0017] Figure 3 This is a side view of the three-dimensional cross-section of the present invention.

[0018] In the diagram: 1. Tubular brazing furnace body; 2. Sealed furnace door; 3. Handle; 4. Controller; 5. Heater; 6. Workstation; 7. Main pipeline; 8. High vacuum gauge; 9. Molecular pump; 10. Fore-stage valve; 11. Mechanical pump; 12. Bypass valve; 13. Ball valve; 14. Fine-tuning valve; 15. Venting valve. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0022] Example

[0023] Reference Figure 1-3 This embodiment of the present invention provides a vacuum tube brazing furnace, including a tubular brazing furnace body 1 with a sealed furnace door 2 hinged to its left side, a controller 4 fixedly installed on the outer surface of the tubular brazing furnace body 1, three sets of heaters 5 arranged in the inner cavity of the tubular brazing furnace body 1, heaters 5 installed on both sides of the inner cavity of the tubular brazing furnace body 1, a work platform 6 fixed at the bottom of the inner cavity of the tubular brazing furnace body 1, a main pipe 7 connected to the right side of the tubular brazing furnace body 1, and a high-pressure water jet connected to the top of the main pipe 7. Vacuum gauge 8, one end of the bottom of the main pipe 7 is connected to a molecular pump 9 via a connecting pipe, the bottom of the molecular pump 9 is connected to a pre-stage valve 10 via a connecting pipe, the bottom of the pre-stage valve 10 is connected to a mechanical pump 11 via a connecting pipe, the right side of the mechanical pump 11 is connected to a bypass valve 12 via a connecting pipe, the top of the bypass valve 12 is connected to a ball valve 13 via a connecting pipe, the other end of the bottom of the main pipe 7 is connected to a fine-tuning valve 14 via a connecting pipe, and the bottom of the fine-tuning valve 14 is connected to a vent valve 15 via a connecting pipe.

[0024] The sealed furnace door 2 is fixedly installed with a hinge on the rear side, and the hinge is fixedly installed with the surface of the tubular brazing furnace body 1. The hinge structure ensures that the sealed furnace door 2 and the tubular brazing furnace body 1 are tightly fitted to avoid vacuum leakage and maintain a clean environment inside the furnace.

[0025] Specifically, the surface of the tubular brazing furnace body 1 is equipped with a display screen and operation buttons. The display screen shows key parameters such as temperature and vacuum level in real time, while the operation buttons provide centralized control, reducing the risk of misoperation.

[0026] Furthermore, the workstation 6 supports the design of two or more workstations, and through multi-workstation parallel processing, it is suitable for batch welding, such as electronic components, precision metal parts, etc.

[0027] Preferably, a graphite fixture can be installed on the workstation 6 to prevent contamination caused by contact with the brazing filler metal. The graphite material is resistant to high temperatures and brazing filler metal wetting, thus preventing the brazing filler metal from sticking to and contaminating the workpiece during the welding process.

[0028] It should be noted that the top of the ball valve 13 is connected to the bottom of the main pipe 7 via a connecting pipe.

[0029] During use, confirm that mechanical pump 11 and molecular pump 9 are operating normally and without leaks. Clean the furnace chamber to prevent residual materials from volatilizing at high temperatures and contaminating the workpiece. Select high-purity foil or filament solder. Use graphite clamps to fix the chip and substrate, ensuring uniform pressure on the contact surface and preventing contamination caused by contact between the metal clamps and the solder. When evacuating, first start mechanical pump 11 to evacuate to 10. -1 Pa, then turn on the molecular pump 9 to reach 10. -4 Below Pa (approximately 30-60 minutes), temperature control and welding are performed in stages: First stage: room temperature → 300℃, rate 5℃ / min (to remove adsorbed gases); Second stage: 300℃ → solder melting point +50℃ (e.g., 800℃), rate 3℃ / min; Holding stage: time adjusted according to solder flowability (usually 10-30 minutes); Cooling control: the furnace is cooled to below 200℃ before vacuuming (to prevent oxidation), cooling rate ≤2℃ / min. This effectively provides vacuum brazing functionality, using as few mechanical pumps as possible (11) and molecular pumps (9) to reduce costs and maximize equipment efficiency; Vacuum environment: the vacuum level of the welding chamber is typically 10. -3 ~10 -5 Pa completely eliminates the risk of oxidation, eliminates the need for inert gas protection, reduces gas costs, and features precise temperature control: multi-zone independent temperature control (±1℃ accuracy) ensures uniform temperature within the furnace, with a maximum temperature of up to 500℃. It can effectively provide vacuum tube brazing functionality, enabling the welding of components in a vacuum environment.

[0030] In summary, the vacuum system, composed of mechanical pump 11, molecular pump 9, and corresponding valves, can serve multiple workstations through reasonable pipeline connections. This improves the sharing and utilization efficiency of vacuum system equipment such as pumps, avoids resource waste, and provides an ideal vacuum environment for related welding work. It effectively prevents oxidation of the welded components during the welding process, thereby ensuring welding quality. This invention can effectively provide vacuum brazing functionality, achieving cost reduction and efficient equipment utilization by using as few mechanical pumps 11 and molecular pumps 9 as possible. The number of mechanical pumps 11, molecular pumps 9, and corresponding valves can be adjusted according to the number of workstations, but the basic structure and principle of the system remain unchanged.

[0031] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0032] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0033] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A vacuum tube brazing furnace, characterized in that: The tubular brazing furnace body (1) includes a sealed furnace door (2) hinged to its left side, a handle (3) fixed to the left side of the sealed furnace door (2), a controller (4) fixedly installed on the outer surface of the tubular brazing furnace body (1), three sets of heaters (5) provided in the inner cavity of the tubular brazing furnace body (1), a work platform (6) fixed at the bottom of the inner cavity of the tubular brazing furnace body (1), a main pipe (7) connected to the right side of the tubular brazing furnace body (1), a high vacuum gauge (8) connected to the top of the main pipe (7), and a... One end of the main pipe (7) is connected to a molecular pump (9) via a connecting pipe. The bottom of the molecular pump (9) is connected to a pre-stage valve (10) via a connecting pipe. The bottom of the pre-stage valve (10) is connected to a mechanical pump (11) via a connecting pipe. The right side of the mechanical pump (11) is connected to a bypass valve (12) via a connecting pipe. The top of the bypass valve (12) is connected to a ball valve (13) via a connecting pipe. The other end of the bottom of the main pipe (7) is connected to a fine-tuning valve (14) via a connecting pipe. The bottom of the fine-tuning valve (14) is connected to a venting valve (15) via a connecting pipe.

2. The vacuum tube brazing furnace according to claim 1, characterized in that: A hinge is fixedly installed on the rear side of the sealed furnace door (2), and the hinge is fixedly installed on the surface of the tubular brazing furnace body (1).

3. A vacuum tube brazing furnace according to claim 2, characterized in that: The surface of the tubular brazing furnace body (1) is equipped with a display screen and operation buttons.

4. A vacuum tube brazing furnace according to claim 3, characterized in that: The workstation (6) supports the design of two or more workstations.

5. A vacuum tube brazing furnace according to claim 4, characterized in that: The workstation (6) can be equipped with a graphite clamp to prevent contamination caused by contact with the brazing filler metal.

6. A vacuum tube brazing furnace according to claim 5, characterized in that: The top of the ball valve (13) is connected to the bottom of the main pipe (7) via a connecting pipe.

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