A vacuum reflow oven

Abstract

The utility model discloses a vacuum reflow soldering furnace, comprising: a device body; a soldering furnace body, comprising a lower furnace body embedded in the device body and an upper furnace body rotatably arranged above the lower furnace body, a first sealing sleeve is sleeved on the outer side of the lower furnace body, a second sealing sleeve corresponding to the first sealing sleeve is arranged at the bottom of the upper furnace body, a first air pipe extends outward from the furnace chamber side wall of the lower furnace body, the outer end of the first air pipe is connected to a vacuum pump and extends to the outside of the device body through the second air pipe; a heating table is arranged in the furnace chamber of the lower furnace body through a heating rod. The utility model can solve the problem that when the vacuum reflow soldering furnace is closed, vibration and airflow are easily generated, resulting in displacement of the welding object, the sealing of the furnace body is poor, the welding quality is affected, and it is also inconvenient to remove the welding workpiece and overhaul the heating device in the soldering furnace.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum reflow soldering, in particular to a vacuum reflow soldering furnace. Background Art

[0002] At present, when the vacuum reflow oven is closed, vibration and airflow are prone to occur, which may cause the welding objects to shift. The sealing of the oven is not good, which affects the welding quality. It is also inconvenient to remove the welding workpiece and inspect the heating device in the oven. Utility Model Content

[0003] The utility model aims to provide a vacuum reflow soldering furnace to solve the problems that when the vacuum reflow soldering furnace is closed, vibration and airflow are easily generated, resulting in displacement of the soldering object, poor sealing of the furnace body, affecting the soldering quality, and inconvenient removal of the soldering workpiece and maintenance of the heating device in the soldering furnace.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solution: a vacuum reflow oven, comprising:

[0005] Device body;

[0006] The welding furnace body comprises a lower furnace body embedded in the device body and an upper furnace body rotatably arranged above the lower furnace body, a first sealing sleeve is sleeved on the outer side of the lower furnace body, a second sealing sleeve corresponding to the first sealing sleeve is arranged at the bottom of the upper furnace body, a first air pipe extends outwardly from the furnace chamber side wall of the lower furnace body, and the outer end of the first air pipe is connected to a vacuum pump and extends to the outside of the device body through a second air pipe;

[0007] The heating platform is elevated and arranged in the furnace cavity of the lower furnace body through a heating rod frame.

[0008] As a further description of the above technical solution:

[0009] The lower furnace body and the upper furnace body are both trapezoidal structures, and the inclined surface of the top of the lower furnace body is tightly spliced ​​with the bottom of the upper furnace body.

[0010] As a further description of the above technical solution:

[0011] An annular groove is arranged on the outer side of the furnace cavity at the top of the lower furnace body, and the first sealing sleeve is embedded in the annular groove and is fitted and positioned by an L-shaped positioning piece at the bottom thereof.

[0012] As a further description of the above technical solution:

[0013] An isolation plate is arranged outside the heating platform, one side of the isolation plate abuts against the inner wall of the lower furnace body and the other side abuts against the inner side of the first sealing sleeve, and a hole is arranged on the isolation plate to connect the furnace cavities of the lower furnace body and the upper furnace body.

[0014] As a further description of the above technical solution:

[0015] A sealing convex ring is arranged on the top surface of the first sealing sleeve, and the sealing convex ring is assembled in the sealing groove at the bottom of the second sealing sleeve.

[0016] As a further description of the above technical solution:

[0017] A hinge plate is arranged at the rear side of the upper furnace body, and the hinge plate is hinged on the device body. The device body is provided with cylinders on both sides of the upper furnace body, and the output ends of the cylinders are hinged on the upper furnace body.

[0018] As a further description of the above technical solution:

[0019] The device body is provided with a pressing attachment on the side of the welding furnace body, and the pressing attachment includes a lifting rod lifted and lowered on the device body and a T-shaped pressing plate rotatably connected to the lifting rod, and a plurality of pressing columns are provided at the bottom of the pressing plate.

[0020] As a further description of the above technical solution:

[0021] The device body is also provided with a guardrail with mesh holes on the side of the welding furnace body, a grating fixed on the inner side of the outer end of the guardrail, and a controller.

[0022] In summary, due to the adoption of the above technical solution, the utility model has the following advantages compared with the prior art:

[0023] Beneficial effects:

[0024] 1. Both the lower furnace body and the upper furnace body are trapezoidal structures. The inclined surface on the top of the lower furnace body is tightly spliced ​​with the bottom of the upper furnace body to form a rectangular welding furnace. This design makes it easy for the staff to remove the welding workpiece, add flux and other welding-related operations from the front of the welding furnace device, and it is easy to observe.

[0025] 2. A sealing sleeve is provided between the lower furnace body and the upper furnace body, and cooperates with the pressing accessories to ensure the sealing of the welding furnace when it is closed, so as to ensure the vacuum degree of the internal furnace chamber when the welding furnace is in use, reduce the erosion of the welding workpiece by the outside air and impurities, and thus ensure the welding quality of the workpiece. Among them, the first sealing sleeve is designed independently of the lower furnace body, and the upper furnace body is driven to open and close by the cylinder. An L-shaped positioning piece is provided at the bottom of the first sealing sleeve to improve the stability of the closing process of the upper and lower furnace bodies, reduce the vibration generated when the upper furnace body is closed, and reduce the displacement of the welding object on the heating table caused by the airflow, so as to ensure the welding quality and the accuracy of the welding position. The above structure, combined with the trapezoidal structure of the lower furnace body, makes the maintenance of the heating device more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The figure is a schematic diagram of the structure of a vacuum reflow oven.

[0028] Figure 2 The figure is a front view of a vacuum reflow oven.

[0029] Figure 3 A side cross-sectional view of a vacuum reflow oven.

[0030] Figure 4 The present invention is a side cross-sectional view of a soldering furnace body in a vacuum reflow soldering furnace.

[0031] Legend:

[0032] 1. Device body; 2. Welding furnace body; 21. Lower furnace body; 211. First air pipe; 22. Upper furnace body; 221. Hinge plate; 222. Second sealing sleeve; 223. Sealing groove; 23. Heating table; 231. Isolation plate; 24. Heating rod; 25. First sealing sleeve; 251. Positioning piece; 252. Sealing convex ring; 26. Cylinder; 27. Vacuum pump; 28. Second air pipe; 3. Press attachment; 31. Press attachment plate; 32. Lifting rod; 4. Guardrail; 5. Grating; 6. Controller. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0035] See also Figure 1-4 The utility model provides a technical solution: a vacuum reflow oven, comprising:

[0036] Device body 1;

[0037] The welding furnace body 2 comprises a lower furnace body 21 embedded in the device body 1 and an upper furnace body 22 rotatably arranged above the lower furnace body 21. A first sealing sleeve 25 is sleeved on the outer side of the lower furnace body 21, and a second sealing sleeve 222 corresponding to the first sealing sleeve 25 is arranged at the bottom of the upper furnace body 22 to ensure the sealing of the lower furnace body 21 and the upper furnace body 22 when they are closed, so as to ensure the vacuum degree of the internal furnace cavity when the welding furnace is used, reduce the erosion of the outside air and impurities on the welding workpiece, and thus ensure the welding quality of the workpiece. A first air pipe 211 extends outward from the side wall of the furnace cavity of the lower furnace body 21, and the outer end of the first air pipe 211 is connected to the vacuum pump 27 and extends to the outside of the device body 1 through the second air pipe 28;

[0038] The heating platform 23 is elevated in the furnace cavity of the lower furnace body 21 by the heating rod 24, which reduces the heat conduction between the heating platform 23 and the welding furnace body 2, thereby reducing the mass loss of the welding furnace body 2 caused by temperature changes and increasing its service life.

[0039] In this embodiment, the lower furnace body 21 and the upper furnace body 22 are both trapezoidal structures. The inclined surface on the top of the lower furnace body 21 fits tightly with the bottom of the upper furnace body 22 to form a rectangular welding furnace. This design allows the opening of the lower furnace body 21 to be tilted upward when the welding furnace is in use, facing the staff, making it convenient for the staff to perform welding-related operations such as removing the welding workpiece and adding flux from the front of the welding furnace device, and it is easy to observe.

[0040] An annular groove is arranged on the top of the lower furnace body 21 on the outer side of the furnace cavity, and the first sealing sleeve 25 is embedded in the annular groove and is fitted and positioned by the L-shaped positioning piece 251 at the bottom thereof. The first sealing sleeve 25 is designed independently of the lower furnace body 21 to reduce the vibration generated when the upper furnace body 22 is closed, and the displacement of the welding object on the heating table 23 caused by the airflow, so as to ensure the welding quality and the accuracy of the welding position.

[0041] An isolation plate 231 is disposed outside the heating platform 23, one side of the isolation plate 231 abuts against the inner wall of the lower furnace body 21 and the other side abuts against the inner side of the first sealing sleeve 25, and a hole is disposed on the isolation plate 231 to connect the furnace cavities of the lower furnace body 21 and the upper furnace body 22. The heating rod 24 is isolated from the outside without affecting the vacuuming of the inner cavity of the welding furnace main body 2, thereby ensuring the heating efficiency and service life.

[0042] A sealing convex ring 252 is arranged on the top surface of the first sealing sleeve 25, and the sealing convex ring 252 is assembled in the sealing groove 223 at the bottom of the second sealing sleeve 222. Both the first sealing sleeve 25 and the second sealing sleeve 222 can adopt elastic sealing sleeves to ensure sealing performance.

[0043] In this embodiment, the rotating connection structure of the upper furnace body 22 is specifically as follows: a hinged plate 221 is arranged on the rear side of the upper furnace body 22, the hinged plate 221 is hinged on the device body 1, and the device body 1 is provided with a cylinder 26 on both sides of the upper furnace body 22, and the output end of the cylinder 26 is hinged on the upper furnace body 22 to improve the stability of the closing process of the upper furnace body 22 and the lower furnace body 21, so as to reduce the vibration and airflow generated.

[0044] In addition, the device body 1 is provided with a pressing attachment 3 on the side of the welding furnace body 2, and the pressing attachment 3 includes a lifting rod 32 that is lifted and lowered on the device body 1 and a T-shaped pressing plate 31 that is rotatably connected to the lifting rod 32. A plurality of pressing columns are provided at the bottom of the pressing plate 31 to further improve the tightness of the closure of the welding furnace body 2. The lifting rod 32 and the device body 1 can be connected by a mechanically driven lifting connection of a motor or a cylinder, or the device body 1 has a built-in spring to perform an elastic connection with the lifting rod 32.

[0045] The device body 1 is also provided with a mesh guardrail 4, a grating 5 fixed to the inner side of the outer end of the guardrail 4, and a controller 6 on the side of the welding furnace body 2 to carry out the safety design of the welding furnace device to avoid harm to personnel when the welding furnace is used.

[0046] The working principle of a vacuum reflow soldering furnace of the present embodiment includes: when in use, the cylinder 26 is first driven by the controller 6 to drive the upper furnace body 22 to flip and move upward, the furnace chamber of the welding furnace main body 2 is opened, the welding workpiece is placed on the heating table 23, the soldering flux and the parts to be welded are placed in the corresponding positions of the welding workpiece in turn, and the cylinder 26 is driven in the reverse direction again to drive the upper furnace body 22 to close on the lower furnace body 21. At the moment of contact between the two, the positioning member 251 is used for buffering to reduce vibration, the sealing convex ring 252 and the sealing groove 223 are engaged, and then the pressing plate 31 is rotated to the top of the welding furnace main body 2, and the lifting and lowering adjustment is performed by the lifting rod 32, so that the pressing plate 31 is pressed on the welding furnace main body 2 to ensure the sealing, and the grating 5 can be started for safety monitoring, the vacuum pump 27 is used to evacuate the furnace chamber in the welding furnace main body 2, and the heating table 23 heats the soldering flux so that the parts to be welded are welded on the welding workpiece. After welding is completed, the heating rod 24 is used for cooling and cooling, and the upper furnace body 22 can be opened to take out the welding workpiece. When the heating device needs to be repaired, the first sealing sleeve 25 is disassembled and taken out, and the repair operation can be carried out through the gap between the bottom of the heating platform 23 and the trapezoidal lower furnace body 21.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vacuum reflow oven, characterized in that: include: Device body; The welding furnace body comprises a lower furnace body embedded in the device body and an upper furnace body rotatably arranged above the lower furnace body, a first sealing sleeve is sleeved on the outer side of the lower furnace body, a second sealing sleeve corresponding to the first sealing sleeve is arranged at the bottom of the upper furnace body, a first air pipe extends outwardly from the furnace chamber side wall of the lower furnace body, and the outer end of the first air pipe is connected to a vacuum pump and extends to the outside of the device body through a second air pipe; The heating platform is elevated and arranged in the furnace cavity of the lower furnace body through a heating rod frame.

2. A vacuum reflow oven according to claim 1, characterized in that: The lower furnace body and the upper furnace body are both trapezoidal structures, and the inclined surface of the top of the lower furnace body is tightly spliced ​​with the bottom of the upper furnace body.

3. A vacuum reflow oven according to claim 1, characterized in that: The top of the lower furnace body is provided with an annular groove on the outer side of the furnace cavity thereof, and the first sealing sleeve is embedded in the annular groove and is fitted and positioned by an L-shaped positioning piece at the bottom thereof.

4. The vacuum reflow oven according to claim 1, characterized in that: An isolation plate is arranged outside the heating platform, one side of the isolation plate abuts against the inner wall of the lower furnace body and the other side abuts against the inner side of the first sealing sleeve, and a gap connecting the furnace cavities of the lower furnace body and the upper furnace body is arranged on the isolation plate.

5. The vacuum reflow oven according to claim 1, characterized in that: A sealing convex ring is arranged on the top surface of the first sealing sleeve, and the sealing convex ring is assembled in the sealing groove at the bottom of the second sealing sleeve.

6. The vacuum reflow oven according to claim 1, characterized in that: A hinge plate is arranged at the rear side of the upper furnace body, and the hinge plate is hinged on the device body. The device body is provided with cylinders on both sides of the upper furnace body, and the output ends of the cylinders are hinged on the upper furnace body.

7. The vacuum reflow oven according to claim 1, characterized in that: The device body is provided with a pressing attachment on the side of the welding furnace body, and the pressing attachment includes a lifting rod lifted and lowered on the device body and a T-shaped pressing plate rotatably connected to the lifting rod, and a plurality of pressing columns are provided at the bottom of the pressing plate.

8. The vacuum reflow oven according to claim 1, characterized in that: The device body is also provided with a guardrail with mesh holes on the side of the welding furnace body, a grating fixed on the inner side of the outer end of the guardrail, and a controller.

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