Vacuum reflow oven

Abstract

The present application relates to a vacuum reflow soldering machine, including a frame, a welding module, a vacuum module, a cooling module and a transmission part; the transmission part is arranged on the frame and transported from one end of the frame to the other end; the welding module, the vacuum module and the cooling module are arranged in sequence on the frame along the transport direction; the workpiece is welded in the welding module, and sent to the vacuum module through the transmission part, the transmission part moves out of the vacuum module and stops transporting, the vacuum module is closed, and a sealing structure is formed inside it, and the vacuum module is opened after the work is finished, and the workpiece is sent out after the cooling module. The closed sealing structure of the vacuum module is small in volume, and the interior is only matched with a single workpiece, ensuring that it can be quickly vacuumed, and vacuuming in a small space The sealing structure improves the production and processing efficiency of the assembly line operation. It takes about 2-3 minutes to vacuum a workpiece. Compared with the previous single-unit single welding and simultaneous vacuuming assembly line operation, it can effectively improve the overall processing efficiency of the assembly line.

Description

Technical Field

[0001] The present application relates to the field of chip welding, and in particular to a vacuum reflow soldering machine. Background Art

[0002] With the advancement of technology, the welding process has also changed from manual operation to mechanized operation. Bubbles will appear on the welding surface under normal pressure, affecting the performance of the workpiece. The four key steps of vacuum reflow soldering are preheating, reflow, vacuum and cooling.

[0003] The existing vacuum reflow soldering usually involves single-unit soldering and then simultaneously evacuating the entire device. Each process takes 8 or 9 minutes, which is slow and not conducive to batch and assembly line operations. Summary of the invention

[0004] In view of this, the present application proposes a vacuum reflow soldering machine, comprising a frame, a welding module, a vacuum module, a cooling module and a transmission part, wherein the transmission part is arranged on the frame and transports along the direction from one end of the frame to the other end; the welding module, the vacuum module and the cooling module are arranged in sequence on the frame along the transport direction, the workpiece is welded in the welding module and sent to the vacuum module through the transmission part, the transmission part moves out of the vacuum module and stops transporting, the vacuum module is closed, and a sealing structure is formed inside it, the vacuum module is opened after the work is completed, and the workpiece is sent out after the cooling module.

[0005] In a possible implementation, the transmission part includes a first transmission part and a second transmission part; the front end of the first transmission part is suitable for feeding the workpiece in, the middle section is arranged on the welding module, and the rear end is arranged in front of the vacuum module; the front end of the second transmission part is arranged behind the vacuum module, the middle section is arranged on the cooling module, and the rear end is suitable for feeding the workpiece out.

[0006] In a possible implementation, the welding module, the vacuum module, and the cooling module are all cube structures in a closed working state, and the welding module, the vacuum module, and the cooling module have the same width along the conveying direction.

[0007] In a possible implementation, the first transmission part includes a transmission bar, a first motor, a second motor, a movable push rod and a lifting push rod; the transmission bar is arranged on both sides of the welding module; the first motor is fixedly arranged inside the frame; the lifting push rod is transmission-connected to the first motor, and the lifting push rod is connected to the transmission bar, driving the transmission bar to rise or fall, driving the transmission bar to rise and lift the workpiece or to fall and place the workpiece on the welding module; the movable push rod is transmission-connected to the second motor, and the movable push rod is transmission-connected to the transmission bar, driving the transmission bar to transport the workpiece forward or backward.

[0008] In a possible implementation, the number of the welding modules is more than two, and adjacent welding modules are arranged at preset intervals.

[0009] In a possible implementation, the vacuum module includes an upper cover and a base; the base is fixedly arranged on the frame, and a vacuum assembly and a heating unit are arranged on the base; the upper cover matches the base structure, and a power unit is arranged under the base and fixedly connected to the upper cover, and the power unit drives the upper cover to reciprocate and rise and fall in the vertical direction.

[0010] In a possible implementation, blocking parts are provided on the transmission bar, the number of the blocking parts is an even number, and two of the blocking parts form a group to clamp the workpiece.

[0011] In a possible implementation, both the welding module and the cooling module are provided with a heat insulation cover, and the heat insulation cover is rotatably fixed to one side of the frame.

[0012] In a possible implementation, a control component is disposed in the frame, and the control component is electrically connected to the transmission part, the welding module, the vacuum module, and the cooling module.

[0013] In a possible implementation, the frame is further covered with a protective cover, and the protective cover is rotatably connected to the frame;

[0014] The protective cover and the heat-insulating cover are arranged on the same side of the frame, the protective cover is closed, and the protective cover is arranged outside the welding module, the vacuum module and the cooling module.

[0015] Beneficial effects of the present invention: The sealed structure of the vacuum module is small in size, and the interior only matches a single workpiece, ensuring that the vacuum can be quickly drawn. The vacuum can be drawn in a sealed structure in a small space, improving the production and processing efficiency of the assembly line operation. It takes about 2-3 minutes to draw a vacuum on a workpiece. Compared with the previous single-unit single welding and simultaneous vacuum assembly line operation, the vacuum reflow soldering machine of the present application can effectively improve the overall processing efficiency of the assembly line. The lifting push rod and the moving push rod cooperate with the transmission bar for conveying, and the workpiece can be conveyed without affecting the work of the vacuum module.

[0016] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 A schematic diagram showing the three-dimensional structure of a vacuum reflow soldering machine according to an embodiment of the present application is shown;

[0019] Figure 2 A three-dimensional structural diagram of a vacuum pumping module according to an embodiment of the present application is shown;

[0020] Figure 3 A three-dimensional structural diagram showing a vacuum module of an embodiment of the present application without an upper cover;

[0021] Figure 4 A schematic structural diagram of the first transmission part of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0023] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0026] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0027] like Figure 1-Figure 4 As shown, the vacuum reflow soldering machine comprises: a frame 10, a welding module 20, a vacuum module 30, a cooling module 40 and a transmission part 50. The transmission part 50 is arranged on the frame 10 and transported from one end of the frame 10 to the other end; the welding module 20, the vacuum module 30 and the cooling module 40 are arranged in sequence on the frame 10 along the transport direction. The workpiece 70 is welded in the welding module 20 and sent to the vacuum module 30 through the transmission part 50. The transmission part 50 moves out of the vacuum module 30 and stops transporting. The vacuum module 30 is closed, and a sealed structure is formed inside. The vacuum module 30 is opened after the work is completed, and the workpiece 70 is sent out after passing through the cooling module 40.

[0028] For the convenience of description, the frame 10 is located in front of the welding module 20 as the entrance of the workpiece 70, and behind the cooling module 40 is the exit of the workpiece 70. The direction from the entrance of the workpiece 70 to the exit of the workpiece 70 is the conveying direction, and the opposite direction is the conveying reverse direction. The end adjacent to the entrance of the workpiece 70 is the conveying front end, and the end adjacent to the exit of the workpiece 70 is the conveying rear end.

[0029] In this embodiment, the vacuum reflow soldering machine applied for can be divided into three sections as a whole: the front end is a welding module 20, the middle section is a vacuum module 30, and the rear end is a cooling module 40. It is transported from the entrance of the workpiece 70 to the exit of the workpiece 70 through a transmission part 50. The assembly line operation is completed according to the above three steps. After the welding operation is completed, vacuum is drawn to expel the bubbles in the middle of the solder, so that the workpiece 70 is welded more firmly. On the assembly line, when the vacuum module 30 is closed, in order to ensure the efficiency of positive vacuuming and high vacuum degree, the volume of the sealing structure should be as small as possible. Preferably, the internal structure of the sealing structure only matches a single workpiece 70 to ensure rapid vacuuming. Due to the different workpieces 70, no specific limitation is made. The implementers in this field can select a suitable vacuum module 30 according to the structure of the workpiece 70. The workpiece 70 is sent to the vacuum module 30 after being processed by multiple welding modules 20. The vacuum is drawn in the sealed structure of a small space to improve the production and processing efficiency of the assembly line operation. After the vacuum module 30 is finished, the workpiece 70 is moved to the cooling module 40 for cooling. After cooling, it is transmitted from the outlet of the workpiece 70 to complete the entire processing process in the positive vacuum reflow soldering machine. Generally, the workpiece 70 is specifically a chip transported by tooling.

[0030] Specifically, after testing, the assembly line operation of the device can vacuum a workpiece 70 in about 2-3 minutes. Compared with the previous assembly line operation of single-body welding and simultaneous vacuuming, the vacuum reflow soldering machine of the present application can effectively improve the overall processing efficiency of the assembly line.

[0031] It should be noted that the specific welding method of the welding module 20, the vacuum assembly of the vacuum module 30 and the cooling of the cooling module 40 are all existing technologies, and no changes have been made in the vacuum reflow soldering machine of the present application, so they will not be repeated here.

[0032] In one specific embodiment, the transmission part 50 includes a first transmission part 51 and a second transmission part 52. The front end of the first transmission part 51 is arranged at the entrance position of the workpiece 70, the middle section is arranged on the welding module 20, and the rear end is arranged in front of the vacuum module 30. The front end of the second transmission part 52 is arranged behind the vacuum module 30, the middle section is arranged on the cooling module 40, and the rear end is arranged at the exit position of the workpiece 70.

[0033] In this embodiment, the transmission part 50 is divided into two sections. Because the vacuum module 30 is closed, in order to avoid the transmission part 50 affecting its sealing structure when the vacuum module 30 is closed, the transmission part 50 is divided into a first transmission part 51 arranged from the entrance of the workpiece 70 to the front end of the vacuum module 30 and a second transmission part 52 from the rear end of the vacuum module 30 to the outlet of the workpiece 70. It should be noted that the first transmission part 51 should at least be a reciprocating mechanism. After the workpiece 70 is transported into the vacuum module 30, it is moved out of the vacuum module 30 and returns to the initial position, without affecting the sealing of its internal sealing structure, and is ready to start transporting the next workpiece 70.

[0034] Specifically, the vacuum module 30 includes part of the second transmission part 52. When the vacuum module 30 completes a work and is turned on, the second transmission part 52 in the vacuum module 30 drives the workpiece 70 to move out of the vacuum module 30 and enter the cooling module 40, and is sent out of the assembly line after cooling.

[0035] In one specific embodiment, the welding module 20, the vacuum module 30 and the cooling module 40 are all cube structures in the closed working state, and the welding module 20, the vacuum module 30 and the cooling module 40 have the same width along the conveying direction.

[0036] In this embodiment, in order to facilitate the integrated design of the assembly line of the vacuum reflow soldering machine of the present application, the sizes of the welding module 20, the vacuum module 30 and the cooling module 40 should be kept consistent as much as possible, so as to facilitate the transmission part 50 to transport. The welding module 20, the vacuum module 30 and the cooling module 40 are a cubic structure when closed, which has a simple structure, is easy to mass produce and process, saves costs, and is more conducive to connecting multiple modules to realize assembly line operation. The workpieces 70 to be processed by each module are of the same size, and the welding modules 20, the vacuum module 30 and the cooling module 40, which have the same width along the conveying direction, are arranged neatly and orderly, making the overall structure and layout of the vacuum reflow soldering machine of the present application more reasonable, and improving the overall aesthetics of the soldering machine.

[0037] like Figure 1 , Figure 4 As shown, in one specific embodiment, the first transmission part 51 includes a transmission bar 511, a first motor, a second motor, a moving push rod 514 and a lifting push rod 515. The transmission bar 511 is arranged on both sides of the welding module 20, and the first and second motors are fixedly arranged inside the frame 10. The lifting push rod 515 is connected to the first motor in a transmission connection, and the lifting push rod 515 is connected to the transmission bar 511, driving the transmission bar 511 to rise or fall, driving the transmission bar 511 to rise and hold up the workpiece 70 or to fall and place the workpiece 70 on the welding module 20. The moving push rod 514 is connected to the second motor in a transmission connection, and the moving push rod 514 is connected to the transmission bar 511 in a transmission connection, driving the transmission bar 511 to transport the workpiece 70 forward or backward.

[0038] In this embodiment, the transmission part is specifically a transmission bar 511, which is arranged on both sides of the welding module 20. The welding module 20 has a groove 513 matching the transmission bar 511 at the corresponding position. The structure is firm and the strip is easy to transmit, which can save materials and costs.

[0039] Specifically, when the workpiece 70 is not transferred to the initial position, it is placed on the welding module 20 and supported by the grooves 513 on both sides. The first motor and the second motor are both arranged in the frame 10. The first motor is connected to the lifting push rod 515, and the second motor is connected to the moving push rod 514.

[0040] Furthermore, the moving push rod 514 is arranged below the front end position of the transmission bar 511, and the number of lifting push rods 515 is multiple, which are also arranged below the transmission bar 511, and the multiple lifting push rods 515 are arranged at equal intervals behind the moving push rod 514. The positions of the moving push rods 514 and the lifting push rods 515 should not interfere with the position of the welding module 20. The lifting push rod 515 moves up, and the transmission bar 511 is higher than the height of the groove body 513, thereby lifting the workpiece 70. The moving push rod 514 moves along the conveying direction, and the workpiece 70 moves into the vacuum module 30. The lifting push rod 515 moves down, and the height is lower than the height of the groove body 513, and the workpiece 70 remains in the base 32 of the vacuum module 30. The moving push rod 514 is reset to the preset position along the conveying reverse direction, and the rear end of the transmission bar 511 is moved out of the vacuum module 30 without affecting the closing operation of the vacuum module 30, completing a cycle of work.

[0041] In one specific embodiment, the number of welding modules 20 is more than two, and adjacent welding modules 20 are arranged at a preset interval.

[0042] In this embodiment, the number of the front-end welding modules 20 is more than two, that is, the workpiece 70 undergoes multiple steps of welding processing before vacuuming, and the assembly line is effectively and fully utilized to process the workpiece 70 and complete more complex production and processing steps.

[0043] like Figure 2 , Figure 3 As shown, in one specific embodiment, the base 32 is fixedly mounted on the frame 10, a vacuum assembly and a heating unit are disposed on the base 32, the upper cover 31 is structurally matched with the base 32, and a power unit is disposed under the base 32 and fixedly connected with the upper cover 31, and the power unit drives the upper cover 31 to reciprocate and rise and fall in the vertical direction.

[0044] In this embodiment, when the vacuum module 30 is not working, the base 32 is fixedly installed at the corresponding position of the frame, and there is a preset distance between the upper cover 31 and the base 32, which is the initial position of the upper cover 31. At this time, the transmission part 50 transports the workpiece 70 from the outside into between the upper cover 31 and the base 32. When the workpiece 70 completely enters the base 32, the lifting mechanism drives the upper cover 31 to move downward together until it is closed with the base 32, and the vacuum module 30 starts to work. The vacuum state and the vacuum degree of the sealed space vary according to the specific material, temperature and more influencing factors, so no more specific limitations are made here. After a certain period of time, the power unit drives the upper cover 31 to return to the initial position, and the workpiece 70 is transported out of the vacuum module 30 through the transmission part 50 to carry out the cooling process.

[0045] like Figure 3 As shown, in one specific embodiment, a blocking portion 512 is disposed on the transmission bar 511 , the number of the blocking portions 512 is an even number, and two blocking portions 512 form a group to clamp the workpiece 70 .

[0046] In one specific embodiment, a plurality of rollers are arranged on the base 32 in the vacuum module 30, and the rollers are arranged in at least two rows along the conveying direction. When the vacuum module 30 completes a vacuum operation, the workpiece 70 in the base 32 is conveyed out by the rollers to continue the subsequent assembly line work.

[0047] In one specific embodiment, a control component 60 is disposed in the frame 10 , and the control component 60 is electrically connected to the transmission part 50 , the welding module 20 , the vacuum module 30 and the cooling module 40 .

[0048] In one specific embodiment, a heat insulation cover 21 is provided on the welding module 20 and the cooling module 40, and the heat insulation cover 21 is rotatable to open and close.

[0049] In this embodiment, it should be particularly pointed out that recesses are respectively provided at both ends of the heat insulation cover 21, and the depth of the recesses is greater than the height of the workpiece 70 at the highest position. Since the transmission bar 511 driven by the lifting push rod 515 and the moving push rod 514 needs to be lifted and moved within a relatively small range, in order to prevent the heat insulation cover 21 from interfering with the overall movement of the transmission part 50 and affecting the transportation, it is necessary to consider that the depth of the recess is greater than the height of the workpiece 70 at the highest position during design.

[0050] In addition, it should be pointed out that since this equipment is in a high temperature state when working, all its materials must be high temperature resistant materials, and the specific materials are not limited in this article.

[0051] In one specific embodiment, a protective cover 11 is further provided on the frame, and the two ends of the frame are respectively a workpiece entrance and a workpiece exit, the protective cover 11 is connected to the frame shaft, and the protective cover 11 and the insulation cover 21 are arranged on the same side of the frame, the protective cover 11 is closed, and the protective cover 11 is arranged outside the welding module, the vacuum module and the cooling module.

[0052] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A vacuum reflow soldering machine, It is characterized in that It includes a frame, a welding module, a vacuum module, a cooling module and a transmission part; The transmission part is arranged on the frame and transports from one end of the frame to the other end; the welding module, the vacuum module and the cooling module are arranged in sequence on the frame along the transport direction; The workpiece is welded in the welding module and sent to the vacuum module through the transmission part. The transmission part moves out of the vacuum module and stops conveying. The vacuum module is closed to form a sealed structure inside. The vacuum module is opened after the work is completed, and the workpiece is sent out after passing through the cooling module.

2. The vacuum reflow soldering machine according to claim 1, It is characterized in that The transmission part includes a first transmission part and a second transmission part; The front end of the first transmission part is suitable for feeding the workpiece, the middle part is arranged on the welding module, and the rear end is arranged in front of the vacuum module; The front end of the second transmission part is arranged behind the vacuum module, the middle section is arranged on the cooling module, and the rear end is suitable for sending out the workpiece.

3. The vacuum reflow soldering machine according to claim 1, It is characterized in that The welding module, the vacuum module and the cooling module are all cube structures in a closed working state, and the welding module, the vacuum module and the cooling module have the same width along the conveying direction.

4. The vacuum reflow soldering machine according to claim 2, It is characterized in that The first transmission part includes a transmission bar, a first motor, a second motor, a moving push rod and a lifting push rod; The transmission bars are arranged on both sides of the welding module; The first motor is fixedly arranged inside the frame; The lifting push rod is connected to the first motor in a transmission connection, and the lifting push rod is connected to the transmission bar, driving the transmission bar to rise or fall, driving the transmission bar to rise to hold up the workpiece or to fall to place the workpiece on the welding module; The moving push rod is transmission-connected to the second motor, and the moving push rod is transmission-connected to the transmission bar, driving the transmission bar to transport the workpiece forward or backward.

5. The vacuum reflow soldering machine according to claim 1, It is characterized in that The number of the welding modules is more than two, and adjacent welding modules are arranged at preset intervals.

6. The vacuum reflow soldering machine according to claim 1, It is characterized in that The vacuum module comprises an upper cover and a base; The base is fixedly arranged on the frame, and a vacuum pumping component and a heating part are arranged on the base; The upper cover matches the base structure, and a power unit is provided under the base and fixedly connected to the upper cover, and the power unit drives the upper cover to reciprocate and rise and fall in the vertical direction.

7. The vacuum reflow soldering machine according to claim 4, It is characterized in that The transmission bar is provided with blocking parts, the number of the blocking parts is an even number, and two blocking parts form a group to clamp the workpiece.

8. The vacuum reflow soldering machine according to claim 1, It is characterized in that The welding module and the cooling module are both provided with a heat insulation cover, and the heat insulation cover is rotatably fixed to one side of the frame.

9. The vacuum reflow soldering machine according to claim 1, It is characterized in that A control component is arranged in the frame, and the control component is electrically connected to the transmission part, the welding module, the vacuum module and the cooling module.

10. The vacuum reflow soldering machine according to claim 8, It is characterized in that The frame is also covered with a protective cover, which is rotatably connected to the frame; The protective cover and the heat-insulating cover are arranged on the same side of the frame, the protective cover is closed, and the protective cover is arranged outside the welding module, the vacuum module and the cooling module.

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