Multi-chamber vacuum reflow soldering furnace

Abstract

The application discloses a kind of multi-chamber vacuum reflow soldering furnace, including, the shell with operating door is opened, the shell side is opened feed inlet, the shell side is opened discharge outlet with feed inlet opposite, rack is installed in shell;Rack is installed with material conveying system, material conveying system includes the multi-section horizontal conveying mechanism for horizontal conveying material, and material lifting mechanism is set to the one side of multi-section horizontal conveying mechanism, and multi-section horizontal conveying mechanism includes the feeding conveying table, the connection conveying table and the discharge conveying table sequentially arranged in order;At least a pair of furnace body chamber is arranged along the height direction of rack, and material lifting mechanism is used to lift the material of connection conveying table and convey to the corresponding furnace body chamber, or the material in the corresponding furnace body chamber is placed on connection conveying table by descending.The multi-chamber vacuum reflow soldering furnace of the application can carry out batch production welding, each furnace body chamber can be independently operated, and the production of different processes / different products can be realized.

Description

Technical Field

[0001] This invention belongs to the field of vacuum reflow oven technology, specifically relating to a multi-chamber vacuum reflow oven. Background Technology

[0002] With the rapid development of industries such as new energy, smart grids, and electric vehicles, the market demand for IGBTs (Insulated Gate Bipolar Transistors) and other power devices has surged, making packaging technology one of the key factors restricting the industry's development. Currently, the domestic market is highly dependent on imported equipment, especially high-end surface mount technology (SMT) machines and vacuum reflow ovens. This not only increases manufacturing costs but also limits the industry's ability to maintain independent control.

[0003] A vacuum reflow oven is a device that performs a soldering process on semiconductor chips in a vacuum environment. This device uses a vacuum environment and reducing process gases to protect the products and solder from oxidation, thereby improving soldering quality, enhancing the heat transfer performance of the soldered devices, and ultimately improving the reliability of electronic devices.

[0004] The material conveying system is a crucial component of a vacuum reflow oven. Existing material conveying systems typically use chain conveyors to transport workpieces laterally into the oven chambers for processing. Current systems lack mechanisms for vertical material transport. Furthermore, each oven chamber generally processes only one process, operating in a specific sequence without independence. This results in a low upflow rate (UPH) for the vacuum reflow oven. Summary of the Invention

[0005] To address the aforementioned problems in existing technologies, this invention provides a multi-chamber vacuum reflow oven. The frame of the oven housing is equipped with a material conveying system, which includes a multi-segment horizontal conveying mechanism for horizontal material transport and a material lifting mechanism located on one side of the multi-segment horizontal conveying mechanism. The frame has at least one pair of furnace chambers along its height. The material lifting mechanism is used to lift and transport material from the connecting conveyor table to the corresponding furnace chamber, or to lower material from the corresponding furnace chamber onto the connecting conveyor table. This multi-chamber vacuum reflow oven, equipped with a material conveying system, significantly improves production efficiency (UPH) and serves as a high-volume production tool for vacuum reflow welding. As a fully automated device, each furnace chamber can operate independently, enabling the production of different processes and products.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A multi-chamber vacuum reflow oven includes a housing with an operating door, a feed inlet on one side of the housing, a discharge outlet on the side of the housing opposite to the feed inlet, and a frame installed inside the housing.

[0008] The frame is equipped with a material conveying system, which includes a multi-segment horizontal conveying mechanism for horizontally conveying materials, and a material lifting mechanism disposed on one side of the multi-segment horizontal conveying mechanism. The multi-segment horizontal conveying mechanism includes a feeding conveyor, a connecting conveyor, and a discharging conveyor arranged in sequence.

[0009] The frame is provided with at least one pair of furnace chambers along the height direction. The material lifting mechanism is used to lift and transport the material from the connecting conveyor to the corresponding furnace chamber, or to lower the material from the corresponding furnace chamber and place it on the connecting conveyor.

[0010] Furthermore, the material lifting mechanism includes a lifting assembly, a moving beam, a gripping assembly for gripping materials, and a first guide assembly. The lifting assembly is drivenly connected to the moving beam, the moving beam can move along the height direction of the lifting assembly, the moving beam is fixedly connected to the gripping assembly, and one end of the moving beam is slidably connected to a first guide assembly.

[0011] The moving beam is horizontally arranged and the lifting assembly is connected to the middle of the moving beam. There are two gripping assemblies, which are symmetrically arranged on both sides of the lifting assembly. Each gripping assembly includes two pairs of opposing finger cylinders, with space left between the two pairs of finger cylinders for gripping materials.

[0012] Furthermore, the lifting assembly includes a first linear module and a lifting basket fixed on the moving beam. A first drive motor is installed at one end of the first linear module. A top position sensor and a bottom position sensor are installed in the height direction of the first linear module. The top position sensor is located above the bottom position sensor.

[0013] The lifting basket is fixed to one side of the moving beam in the direction of movement. The lifting basket is arranged along the length of the moving beam. The finger cylinder is fixed on the lifting basket. The finger cylinders are arranged parallel to each other. The finger cylinder is also equipped with a cylinder stroke sensor.

[0014] Furthermore, the first guide assembly includes a first guide shaft, a shaft mounting plate, a bearing mounting seat, and a first linear bearing. Both ends of the first guide shaft are fixed to the shaft mounting plate. The first guide shaft is equipped with the first linear bearing, which is connected to the bearing mounting seat. The bearing mounting seat is installed at one end of the moving beam.

[0015] Furthermore, a support device is installed at the bottom of the feeding conveyor, connecting conveyor, and discharging conveyor. The support device is used to adjust the position or height of the corresponding feeding conveyor, connecting conveyor, or discharging conveyor in the width direction. The support device includes a height adjustment component, a connecting beam, a slide bar, an adjusting block, and a horizontal adjusting screw. The connecting beam has a groove along its length direction. The slide bar is slidably arranged in the groove. The adjusting block is arranged on both sides of the slide bar. The adjusting block is fixed to the connecting beam. Each adjusting block is threadedly connected to the horizontal adjusting screw. One end of the horizontal adjusting screw abuts against one side of the slide bar.

[0016] The height adjustment assembly includes a height adjustment screw and a pad. The height adjustment screw is threadedly connected to the slide bar and is set perpendicular to the slide bar. The pad abuts against the height adjustment screw and is fixedly set at the lower part of the feeding conveyor, connecting conveyor, or discharging conveyor.

[0017] Furthermore, the feeding conveyor, connecting conveyor, and discharging conveyor each include a conveyor belt motor, a conveyor belt structure, and an intermediate plate. The conveyor belt structures are symmetrically arranged at both ends of the intermediate plate and fixed to both ends of the intermediate plate. The conveyor belt motor is installed on one side of one of the conveyor belt structures, and the conveyor belt motor is in transmission cooperation with the two conveyor belt structures. The intermediate plate is arranged corresponding to the support device, and the support device is installed at the lower part of the intermediate plate.

[0018] Furthermore, the feeding conveyor is equipped with two photoelectric sensors along the material conveying direction, the connecting conveyor is equipped with four photoelectric sensors along the material conveying direction, and the discharging conveyor is equipped with two photoelectric sensors along the material conveying direction.

[0019] Furthermore, the furnace chamber includes:

[0020] A cavity with a hollow structure, one side of which is open;

[0021] A door panel located on one side of the opening of the cavity, the size of which matches the opening;

[0022] A second guide assembly fixed to the side of the cavity, the other end of the second guide assembly being fixedly connected to the door panel, the guide assembly including a second guide shaft, one end of the second guide shaft being fixed to the door panel, and the other end of the second guide shaft extending to one side of the cavity and passing through two second linear bearings fixed on the cavity; and

[0023] A drive module installed at the bottom of the cavity is also in drive with the door panel. The drive module can drive the door panel to move along the second guide assembly to cover the cavity opening or move away from the opening. The drive module is located on one side of the cavity and includes a second linear module and a second drive motor installed at one end of the second linear module. The end of the second linear module away from the motor is fixed to the door panel. The second linear module is fixed to the bottom of the cavity through a connecting plate.

[0024] Furthermore, the second linear module is also equipped with two stroke sensors arranged along the length of the second linear module. The stroke sensors are used to detect the position of the second linear module. A door closing sensor is installed on one side of the cavity, and the door closing sensor is used to detect the door panel status.

[0025] Furthermore, two hanging plates are fixed on the side of the door panel near the cavity. The two hanging plates are arranged parallel to each other, and a chip fixture is placed between the two hanging plates. A top cover is hinged to the upper part of the cavity. The top cover has several threaded holes in its circumference. The side of the cavity facing the top cover has threaded holes corresponding to the threaded holes of the top cover.

[0026] Compared with existing technologies, the beneficial effects of this solution are:

[0027] 1. The multi-chamber vacuum reflow oven of this invention is equipped with a material conveying system. The oven contains at least one pair of oven chambers, each capable of independent operation, enabling batch production welding and significantly improving production efficiency (UPH). It can also produce different processes and products. The material conveying system's lifting mechanism includes a lifting component, a moving beam, a gripping component, and a first guide component. By installing the first guide component at both ends of the gripping component, the moving beam moves linearly up and down under the guidance of the first guide component, maintaining high stability when conveying the (material) chip fixture. The lifting component is used to raise and lower the height of the moving beam, improving the automation level of the material lifting mechanism. The lifting component is installed along the height direction, allowing for multiple pairs of oven chambers to be arranged along this direction, thereby improving the overall space utilization of the multi-chamber vacuum reflow oven equipment.

[0028] 2. The material conveying system also includes a multi-section horizontal conveying mechanism, which comprises a feeding conveyor, a connecting conveyor, and a discharging conveyor arranged sequentially. Materials can pass smoothly through these conveyors, resulting in higher processing accuracy and reduced waste. In the feeding stage, it works with the material lifting mechanism to feed materials into a specific furnace chamber. In the connecting stage, it receives materials from the material lifting mechanism. In the discharging stage, it outputs the processed materials to the outside of the multi-chamber vacuum reflow oven. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a multi-chamber vacuum reflow oven.

[0030] Figure 2 This is a schematic diagram of the material conveying system structure;

[0031] Figure 3 This is a side view of the material conveying system.

[0032] Figure 4 This is a schematic diagram of the material lifting mechanism.

[0033] Figure 5 To capture a partial structural diagram of the component;

[0034] Figure 6 This is a schematic diagram of a multi-segment linear conveyor mechanism.

[0035] Figure 7 Side view of a multi-segment linear conveyor mechanism;

[0036] Figure 8 This is a schematic diagram of the support device structure;

[0037] Figure 9 This is a schematic diagram of the furnace chamber structure.

[0038] Figure 10 This is a front view of the furnace chamber.

[0039] The reference numerals in the attached drawings are, in order: lifting assembly 1, lifting basket 11, support 111, first linear module 12, first drive motor 13, top position sensor 14, bottom position sensor 15, moving beam 2, gripping assembly 3, finger-operated cylinder 31, pneumatic gripper 311, cylinder stroke sensor 32, clamp 33, first guide assembly 4, first guide shaft 41, shaft mounting plate 42, bearing mounting seat 43, first linear bearing 44, feeding conveyor 5, connecting conveyor 6, discharging conveyor 7, conveyor belt motor 71, conveyor belt structure 72, intermediate plate 73, photoelectric sensor 74, flow bar 75, stopper 76, support device 8, connecting beam 81, slide bar 82, adjustment Block 83, Horizontal Adjustment Screw 84, Abutment Part 851, Height Adjustment Screw 86, Pad Block 87, Frame 9, Furnace Chamber 91, Housing 92, Operating Door 921, Feed Inlet 922, Discharge Outlet 923, Ventilation Fan 924, Cavity 911, Door Closing Sensor 9111, Second Linear Bearing 9112, Top Cover 9113, Hinge 9114, Door Panel 912, Hanging Plate 9121, Second Guide Assembly 913, Second Guide Shaft 9131, Shaft Connecting Block 9132, Drive Module 914, Second Linear Module 9141, Second Drive Motor 9142, Moving Seat 9143, Connecting Plate 9144, Stroke Sensor 9145, Chip Fixture 915. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings.

[0041] Multi-chamber vacuum reflow ovens, such as Figure 1 , Figure 2 and Figure 3 As shown, the machine includes a housing 92 with an operating door 921, a feed inlet 922 on one side of the housing 92, and a discharge outlet 923 (not visible in the figure) on the side of the housing 92 opposite to the feed inlet 922. A frame 9 is installed inside the housing 92.

[0042] The frame 9 is equipped with a material conveying system, such as Figure 4 As shown, the material conveying system includes a multi-segment horizontal conveying mechanism for horizontally conveying materials, and a material lifting mechanism disposed on one side of the multi-segment horizontal conveying mechanism. The multi-segment horizontal conveying mechanism includes a feeding conveyor 5, a connecting conveyor 6, and a discharging conveyor 7 arranged in sequence.

[0043] The frame 9 is provided with at least one pair of furnace chambers 91 along the height direction. The material lifting mechanism is used to lift and transport the material from the connecting conveyor 6 to the corresponding furnace chamber 91, or to lower the material in the corresponding furnace chamber 91 and place it on the connecting conveyor 6.

[0044] In one specific embodiment of the present invention, the multi-chamber vacuum reflow oven of the present invention has an operating door 921 installed on the casing 92. The operating door 921 has a two-door structure, each equipped with an observation glass, allowing observation of the operating status of the internal components of the casing 92 without opening the operating door 921. The functional components inside the casing 92 include an electrical control system, and multiple ventilation fans 924 are installed on the upper part of the casing 92 for cooling the entire equipment.

[0045] In this embodiment, the feeding conveyor 5 is correspondingly located at the feeding port 922 of the housing 92, and the discharging conveyor 7 is correspondingly located at the discharging port 923 of the housing 92. A material lifting mechanism is provided on one side of the multi-segment horizontal conveying mechanism. Each pair of furnace chambers 91 is respectively provided with the gripping component 3 of the material lifting mechanism. Each pair of furnace chambers 91 includes two furnace chambers 91, which are arranged along the height direction of the frame 9. Each pair of furnace chambers 91 works independently and processes the chips separately. The multi-segment horizontal conveying mechanism is arranged directly below the gripping component 3 and is horizontally fixed inside the frame 9. The material involved in this invention is mainly the chips to be processed, which are placed on the chip fixture 915. The lifting component 1 is located on the middle side of the connecting conveyor 6. The chip fixture 915 passes through the feeding conveyor 5 and the connecting conveyor 6 in sequence until it reaches below the corresponding furnace chamber 91. The lifting assembly 1 drives the gripping assembly 3 to move up and down, and the gripping assembly 3 grips the chip fixture 915. The discharge conveyor 7 outputs the processed material to the outside of the multi-chamber vacuum reflow oven, thus forming an automatic feeding material conveying system.

[0046] Furthermore, the material lifting mechanism includes a lifting component 1, a moving beam 2, a gripping component 3 for gripping materials, and a first guide component 4. The lifting component 1 is connected to the moving beam 2 in a transmission manner. The moving beam 2 can move along the height direction of the lifting component 1. The moving beam 2 is fixedly connected to the gripping component 3. One end of the moving beam 2 is slidably connected to a first guide component 4.

[0047] The moving beam 2 is horizontally arranged and the lifting assembly 1 is connected to the middle of the moving beam 2. There are two gripping assemblies 3, which are symmetrically arranged on both sides of the lifting assembly 1. Each gripping assembly 3 includes two pairs of opposing finger cylinders 31, with space left between the two pairs of finger cylinders 31 for gripping materials.

[0048] According to a specific embodiment of the present invention, the lifting component 1 is used to raise and lower the height of the moving beam 2. The lifting component 1 is installed along the overall height direction of the equipment. The lifting component 1 is located in the middle of the moving beam 2 and fixed to the side of the moving beam 2. The lower part of the moving beam 2 is fixedly connected to the gripping component 3. The number of gripping components 3 can be set to at least one, which can be set according to the actual number of furnace chambers 91. The gripping component 3 adopts the structure of the finger cylinder 31. The two pairs of oppositely arranged finger cylinders 31 automatically grip the material, thus achieving a higher degree of automation.

[0049] Given the lightweight nature of the chip, the material welding process demands extremely high precision. To prevent displacement during transport, the stability of the transport process must be ensured. Therefore, the smooth movement of the moving beam 2 is crucial. In this embodiment, both ends of the moving beam 2 are slidably connected to the first guide assembly 4 to ensure that, guided by the first guide assembly 4, the moving beam 2 can perform precise linear lifting and lowering movements.

[0050] Furthermore, the lifting assembly 1 includes a first linear module 12 and a lifting basket 11 fixed on the moving beam 2. A first drive motor 13 is installed at one end of the first linear module 12. A top position sensor 14 and a bottom position sensor 15 are installed in the height direction of the first linear module 12. The top position sensor 14 is located above the bottom position sensor 15.

[0051] The lifting basket 11 is fixed to one side of the moving beam 2 in the direction of movement. The lifting basket 11 is arranged along the length of the moving beam 2. The finger cylinder 31 is fixed on the lifting basket 11. The finger cylinders 31 are arranged parallel to each other. The finger cylinder 31 is also equipped with a cylinder stroke sensor 32.

[0052] According to a specific embodiment of the present invention, the first linear module 12 is arranged parallel to the first guide shaft 41 of the first guide assembly 4. The first drive motor 13 is installed at the lower end of the first linear module 12. The first drive motor 13 can be a servo motor, which has the advantage of high position control accuracy and can be precisely controlled during loading. A top position sensor 14 and a bottom position sensor 15 are installed in the height direction of the first linear module 12. The top position sensor 14 and the bottom position sensor 15 are used to sense the position of the gripping assembly 3. The top position sensor 14 and the bottom position sensor 15 can be existing photoelectric sensors on the market. When the lifting basket 11 reaches the position of the top position sensor 14 and the bottom position sensor 15 (safe position), the first drive motor 13 stops working and the lifting basket 11 stops moving.

[0053] In this embodiment, the lifting assembly 1 also includes a lifting basket 11 fixed on the moving beam 2. Specifically, the lifting basket 11 is fixed to the lower part of the moving beam 2, and multiple supports 111 are fixed at the edge of the upper part of the lifting basket 11. The lifting basket 11 is fixed to the side of the moving beam 2 through the supports 111. The lifting basket 11 is arranged along the length direction of the moving beam 2. The finger cylinder 31 is fixed on the lifting basket 11. In this embodiment, the width of the lifting basket 11 is not limited. That is, the width of the lifting basket 11 can be set according to the volume of the multi-chamber vacuum reflow oven during actual installation and the volume of the furnace chamber 91 used for processing materials. The finger cylinders 31 are arranged parallel to each other and are located in the height direction.

[0054] The lever cylinder 31 of the lifting assembly 1 can adopt the existing structure. The upper end of the lever cylinder 31 is fixed with a clamp 33 (not visible in the figure). The clamp 33 adopts a "C" shaped clamp structure, such as... Figure 5 As shown, the clamp 33 is fixed on the lower panel of the lifting basket 11. By adjusting the position of the finger cylinder 31 fixed on the clamp 33, the height of the finger cylinder 31 can be adjusted, thereby adapting to the clamping and fixing of chip fixtures 915 of different heights, which can improve the versatility of the present invention.

[0055] In this embodiment, the lifting component 1 is used to raise and lower the height of the moving beam 2. The lifting component 1 includes a first linear module 12, which is located in the height direction. The purpose of this arrangement is to allow multiple pairs of furnace chambers 91 to be set along the height direction of the first linear module 12. The grabbing component 3 moves the multiple pairs of furnace chambers 91 up and down to transport materials, thereby improving the overall space utilization of the multi-chamber vacuum reflow oven equipment, which also improves production efficiency.

[0056] The first drive motor 13 of the lifting assembly 1 can specifically be an absolute servo motor. An absolute servo motor allows for highly accurate speed and position control, converting voltage signals into torque and speed to drive the controlled object. The servo motor's rotor speed is controlled by the input signal and can respond quickly. In automatic control systems, it is used as an actuator and possesses characteristics such as a small electromechanical time constant, high linearity, and low starting voltage. It can convert received electrical signals into angular displacement or angular velocity output on the motor shaft.

[0057] The finger-shifting cylinder 31 is compact, small in size, and lightweight, enabling it to grasp objects with high repeatability. A pneumatic gripper 311 is hinged to the end of the cylinder body. When the cylinder body is working, the gripper 311 can be positioned horizontally or vertically, allowing the chip fixture 915 to be raised or lowered via the first linear module 12. The finger-shifting cylinder 31 can be automatically controlled by a magnetic switch, improving automation and reducing manual labor.

[0058] Furthermore, the first guide assembly 4 includes a first guide shaft 41, a shaft mounting plate 42, a bearing mounting seat 43, and a first linear bearing 44. Both ends of the first guide shaft 41 are fixed to the shaft mounting plate 42. The first guide shaft 41 is equipped with the first linear bearing 44. The first linear bearing 44 is connected to the bearing mounting seat 43. The bearing mounting seat 43 is installed at one end of the moving beam 2.

[0059] According to a specific embodiment of the present invention, this embodiment provides a specific structure of a first guide assembly 4. The first guide shaft 41 of the first guide assembly 4 is disposed in the height direction, and both ends of the first guide shaft 41 are fixed to the inner wall of the multi-chamber vacuum reflow oven housing 92 through shaft mounting plates 42. A first linear bearing 44 is mounted on the first guide shaft 41, and the first linear bearing 44 is fixed to one end of the moving beam 2 through a bearing mounting seat 43.

[0060] Furthermore, the feeding conveyor 5, the connecting conveyor 6, and the discharging conveyor 7 are all equipped with supporting devices 8 at their lower parts, such as... Figure 6 , Figure 7 and Figure 8 As shown, the support device 8 is used to adjust the position or height of the corresponding feeding conveyor 5, connecting conveyor 6, or discharging conveyor 7 in the width direction. The support device 8 includes a height adjustment component, a connecting beam 81, a slide bar 82, an adjusting block 83, and a horizontal adjusting screw 84. The connecting beam 81 has a groove along its length direction. The slide bar 82 is slidably arranged in the groove. The adjusting blocks 83 are arranged on both sides of the slide bar 82. The adjusting blocks 83 are fixed to the connecting beam 81. Each adjusting block 83 is threadedly connected to the horizontal adjusting screw 84. One end of the horizontal adjusting screw 84 abuts against one side of the slide bar 82.

[0061] The height adjustment assembly includes a height adjustment screw 86 and a pad 87. The height adjustment screw 86 is threadedly connected to the slide bar 82 and is set perpendicular to the slide bar 82. The pad 87 abuts against the height adjustment screw 86 and is fixedly set at the lower part of the feeding conveyor 5, the connecting conveyor 6, or the discharging conveyor 7.

[0062] According to a specific embodiment of the present invention, in the multi-segment linear conveying mechanism of the present invention, the material first enters the feeding conveyor 5 and is conveyed to the connecting conveyor 6. On the connecting conveyor 6, the material is conveyed to the furnace chamber 91 for processing the material. The gripping component 3's finger cylinder 31 puts the product down to the connecting conveyor 6 and conveys the product to the discharge conveyor 7. The material enters the discharge conveyor 7 and is finally transported to the next process.

[0063] To better adjust the horizontal position and form support, a support device 8 is installed at the lower part of the multi-segment linear conveyor mechanism. A connecting beam 81 is used to fix and install the support device 8. A slide bar 82 is located in a groove opened on the upper part of the connecting beam 81. The length of the groove is greater than the length of the slide bar 82, so that the slide bar 82 can slide in the groove of the connecting beam 81. The slide bar 82 is slidably engaged and fixed with the connecting beam 81 by a screw passing through the slide bar 82 (the slide bar 82 and the connecting beam 81 are fixed after the screw is tightened). Specifically, a strip-shaped sliding hole is opened in the bottom of the groove. The screw (not visible in the figure) passes through the strip-shaped sliding hole and is threadedly engaged with the slide bar 82. The screw can slide in the strip-shaped sliding hole. Adjusting blocks 83 are vertically fixed on the upper surface at both ends of the connecting beam 81. A horizontal adjusting screw 84 is horizontal along the length of the connecting beam 81. The horizontal adjusting screw 84 is threadedly engaged with its respective adjusting block 83. The height of the protrusions at both ends of the slide bar 82 is greater than that of the connecting beam 81, so that one end of the horizontal adjusting screw 84 abuts against the abutment part 851 of the protrusion of the slide bar 82. Rotating the horizontal adjusting screw 84 allows the slide bar 82 to slide within the groove of the connecting beam 81, thereby driving the multi-segment linear conveying mechanism on the upper part of the slide bar 82 to move in the width direction, which in turn moves the conveyor belt structure 72 in the horizontal left and right directions, thus better connecting materials.

[0064] In this embodiment, during the material lifting mechanism's operation, in the feeding stage: the electrical control system component first confirms that all furnace chamber 91 door panels 912 are closed. When it is determined that a furnace chamber 91 is in a waiting state and there is material on the connecting conveyor 6 below that chamber 911, the gripping assembly 3 located above the multi-chamber vacuum reflow oven will move downwards via the drive of the first linear module 12. After the bottom position sensor 15 at the bottom of the first linear module 12 confirms the position, the pneumatic gripper 311 of the gripping assembly 3 corresponding to the furnace chamber 91 will hook the chip fixture 915 on the connecting conveyor 6 from the back and lift it. Subsequently, the first drive motor 13 drives the first linear module 12 to move the chip fixture 915 to the upper part of the multi-chamber vacuum reflow oven. At this time, the door panel 912 of the furnace chamber 91, which is in the waiting state, will open. The chip fixture 915 will move downward with the gripping assembly 3 into the door panel 912 of the furnace chamber 91. The displacement stroke of the gripping assembly 3 is precisely set to the absolute position of the top position sensor 14 to the waiting state of the furnace chamber 91 by the absolute value servo system. Then, the pneumatic gripper 311 of the gripping assembly 3's finger cylinder 31 releases, placing the chip fixture 915 into the waiting state of the furnace chamber 91. Subsequently, the gripping assembly 3 returns to the upper part of the multi-chamber vacuum reflow oven, and finally the door panel 912 of the furnace chamber 91 automatically closes.

[0065] During the discharge phase: The electrical control system components first ensure that the doors 912 of all furnace chambers 91 are closed. Once a furnace chamber 91 is determined to be in a completed state, the electrical control system will open the door 912 of that furnace chamber 91.

[0066] The gripping component 3 then moves downwards along the linear module 12 into the door panel 912 of the furnace chamber 91. The displacement stroke of the gripping component 3 is precisely set by the absolute value servo system to the absolute position of the top position sensor 14 to the furnace chamber 91 in the waiting state. Then, the pneumatic gripper 311 of the gripping component 3's finger cylinder 31 hooks the chip fixture 915 from the back. Next, the gripping component 3, together with the chip fixture 915, moves upwards to the upper part of the multi-chamber vacuum reflow oven, while the door panel 912 of the furnace chamber 91 closes. After the system confirms again that all the door panels 912 of the furnace chamber 91 are closed, the chip fixture 915 moves downwards along the first linear module 12 with the gripping component 3. Once the bottom position sensor 15 of the first linear module 12 confirms the position, the pneumatic gripper 311 of the gripping component 3 releases the chip fixture 915 and places it onto the connecting conveyor 6 so that it can continue to be conveyed to the discharge conveyor 7.

[0067] In this embodiment, the height adjustment screw 86 is set vertically (along the height direction), while the pad 87 is fixed to the intermediate plate 73. In order to make the movement of the intermediate plate 73 more stable during adjustment, the slide bar 82 is connected to two height adjustment components. The height adjustment screw 86 passes through the strip hole opened in the connecting beam 81 and the slide bar 82 at the same time.

[0068] Furthermore, the feeding conveyor 5, the connecting conveyor 6, and the discharging conveyor 7 each include a conveyor belt motor 71, a conveyor belt structure 72, and an intermediate plate 73. The conveyor belt structures 72 are symmetrically arranged at both ends of the intermediate plate 73 and fixed to both ends of the intermediate plate 73. The conveyor belt motor 71 is installed on one side of one of the conveyor belt structures 72, and the conveyor belt motor 71 is in transmission cooperation with the two conveyor belt structures 72. The conveyor belt structure 72 can adopt an existing structure. The two sides of the conveyor belt structure 72 are connected by flow strips 75. The flow strips 75 adopt a strip-shaped plate structure and can also guide the movement of materials. The inner side of the conveyor belt structure 72 is connected to the intermediate plate 73. The conveyor belt motor 71 is installed on one side of the conveyor belt structure 72. The output end of the conveyor belt motor 71 is connected to a pulley and a belt roller, which drives the conveyor belt to move. The intermediate plate 73 is arranged corresponding to the support device 8, which is installed at the lower part of the intermediate plate 73. This embodiment provides a specific installation method for the support device 8, which is installed on the intermediate plate 73, specifically, the support device 8 is installed at the lower part of the intermediate plate 73. The number of intermediate plates 73 can be set according to the length of the conveyor belt. Generally, there are two or more intermediate plates 73 to ensure the stability of the conveyor belt structure 72. No specific limitation is made here.

[0069] Furthermore, the feeding conveyor 5 is equipped with two photoelectric sensors 74 along the material conveying direction, the connecting conveyor 6 is equipped with four photoelectric sensors 74 along the material conveying direction, and the discharging conveyor 7 is equipped with two photoelectric sensors 74 along the material conveying direction. Specifically, the photoelectric sensors 74 can be installed in the middle of the intermediate plate 73. The photoelectric sensors 74 are used to monitor the position of the material. After the material passes the photoelectric sensors 74, the photoelectric sensors 74 convert the position signal into an electrical signal and transmit it to the electrical control system, thereby controlling the conveyor belt motor 71.

[0070] In this embodiment, a multi-segment linear conveyor mechanism is used. The first photoelectric sensor 74 (located on the feeding side) of the feeding conveyor 5 is responsible for detecting the entry of material (chip fixture 915). At this time, the conveyor belt motor 71 of the feeding conveyor 5 will start working. The second photoelectric sensor 74 on the feeding conveyor 5 is used to confirm that the material has completely entered the feeding conveyor 5. Once the material has completely entered, the conveyor belt motor 71 will stop working and determine whether the furnace chamber 91 needs to be filled. According to the judgment result of the electronic control system, if it is detected that the material has completely left the feeding conveyor 5 during the material's forward movement, the conveyor belt motor 71 will stop working.

[0071] The first photoelectric sensor, the second photoelectric sensor 74, and the first pair of blocking cylinders (located on the feeding side) on the connecting conveyor 6 together constitute the first station, while the third and fourth photoelectric sensors 74 and the second pair of blocking cylinders constitute the second station. When the system determines that the furnace chamber 91 above the first station needs to be fed, the first pair of blocking cylinders are activated, and the first photoelectric sensor 74 on the connecting conveyor 6 is activated to detect whether the material has entered the first station. At this time, the conveyor belt motor 71 of the connecting conveyor 6 will start working until the material reaches the second photoelectric sensor 74. The second photoelectric sensor 74 is responsible for confirming that the material has completely entered the first station. At this time, the first pair of blocking cylinders prevents the material from continuing to move forward, ensuring that the material stops accurately at the designated position in the furnace chamber 91. Subsequently, the conveyor belt motor 71 will stop working. If the system determines that the furnace chamber 91 above the second station needs to be fed, the second pair of blocking cylinders are activated, and the first photoelectric sensor 74 is activated to detect whether the material has entered the first station. At this point, the conveyor belt motor 71 of the connecting conveyor 6 will start working, and the material will continue to move to the third photoelectric sensor 74, which will detect whether the material has entered the second working position. When the fourth photoelectric sensor 74 senses that the material has completely entered the second working position, the second pair of blocking cylinders will stop the material from moving forward, ensuring that the material stops accurately at the designated position in the furnace chamber 91, and then the conveyor belt motor 71 will stop working.

[0072] During the discharge stage, when the first and second photoelectric sensors 74 of the connecting conveyor 6 detect material at the first station or the third and fourth photoelectric sensors 74 detect material at the second station, it indicates that the process material has been successfully placed onto the connecting conveyor 6 by the gripping component 3. At this time, the electrical control system component needs to confirm that the gripping component 3 has returned to the upper safe position (i.e., the position of the top position sensor). Subsequently, the conveyor belt motor 71 of the connecting conveyor 6 will start working. After the material passes through the connecting conveyor 6, the first photoelectric sensor 74 of the discharge conveyor 7 detects the material entering, and the conveyor belt motor 71 continues to work until the second photoelectric sensor 74 detects the material, indicating that the material has completely entered the discharge conveyor 7. At this time, the conveyor belt motor 71 will stop working.

[0073] Furthermore, such as Figure 9 and Figure 10 As shown, the furnace chamber 91 includes:

[0074] The cavity 911 is configured as a hollow structure, with one side of the cavity 911 being open;

[0075] A door panel 912 is located on one side of the opening of the cavity 911, and the size of the door panel 912 matches the opening.

[0076] A second guide assembly 913 is fixed to the side of the cavity 911. Two second guide assemblies 913 can be provided. The other end of each second guide assembly 913 is fixedly connected to the door panel 912. Each guide assembly includes a second guide shaft 9131. One end of the second guide shaft 9131 is fixed to the door panel 912, and the other end extends to one side of the cavity 911 and passes through two second linear bearings 9112 fixed to the cavity 911.

[0077] A drive module 914 is installed at the bottom of the cavity 911. The drive module 914 is also in transmission cooperation with the door panel 912. The drive module 914 can drive the door panel 912 to move along the second guide component 913 to cover the opening of the cavity 911 or to move away from the opening. The drive module 914 is disposed on one side of the cavity 911. The drive module 914 includes a second linear module 9141 and a second drive motor 9142 installed at one end of the second linear module 9141. The end of the second linear module 9141 away from the motor is fixed to the door panel 912. The second linear module 9141 is fixed to the bottom of the cavity 911 through a connecting plate 9144.

[0078] According to a specific embodiment of the present invention, the cavity 911 can specifically adopt a hexahedral hollow structure. An opening is formed on one side of the cavity 911, and a door panel 912 is provided on the open side. The door panel 912 can cover the opening of the cavity 911. When the cavity 911 is under vacuum, the door panel 912 and a sealing ring located at the edge of the door panel 912 or the opening are pressed together by negative pressure to form a sealed space. The door panel 912 is fixed to the second guide components 913 on both sides of the cavity 911. Under the action of the second guide components 913, the door panel 912 can be placed on or removed from the opening of the cavity 911.

[0079] A drive module 914 is also installed on the cavity 911, specifically on the bottom of both sides of the cavity 911. The drive module 914 also engages with the door panel 912 in a transmission manner. The second guide assembly 913 can restrict the movement path of the door panel 912. The drive module 914 can drive the door panel 912 along the second guide assembly 913 to cover the opening of the cavity 911 or to move away from the opening.

[0080] Existing vacuum reflow ovens typically use a top-hinged or horizontally sliding method for loading and unloading, and most rely on manual opening, which is unsuitable for applications requiring higher levels of automation. In this invention, the oven chamber 91 utilizes the power of the drive module 914 and the guidance of the second guide component 913 to cause the door panel 912 of the chamber 911 to slide out, cooperating with the corresponding gripping component 3 to achieve automatic opening and closing. Simultaneously, one end of the hanging plate 9121 is fixed to the door panel 912, and the operation of the drive module 914 can automatically move the hanging plate 9121 and the chip fixture 915 placed inside the chamber 911 into and out of the chamber 911.

[0081] In this embodiment, there is one drive module 914, which is fixed to the bottom of one side of the cavity 911. The drive module 914 specifically includes a second linear module 9141 and a second drive motor 9142 installed at one end of the second linear module 9141. The second linear module 9141 is horizontally arranged, and the upper part of the second linear module 9141 also includes a movable seat 9143. The movable seat 9143 is fixed to the lower part of the cavity 911 through a connecting plate 9144.

[0082] In this embodiment, the second drive motor 9142 can be a servo motor, and the second linear module 9141 is a lead screw structure. When the second drive motor 9142 is working, the moving seat 9143 moves, and the end of the second linear module 9141 is fixed to the door panel 912, thereby driving the door panel 912 to move. The purpose of this installation is to improve space utilization and avoid the end of the second linear module 9141 extending too far out of the door panel 912.

[0083] Furthermore, the second guide assembly 913 is disposed above the drive module 914. The second guide assembly 913 includes a second guide shaft 9131, which is arranged parallel to the second linear module 9141. One end of the second guide shaft 9131 is fixed to a shaft connecting block 9132, which has an "L"-shaped structure and is fixed at the corner of the door panel 912. The other end of the second guide shaft 9131 extends to one side of the cavity 911 and passes through two second linear bearings 9112 fixed on the cavity 911. Two second linear bearings 9112 are provided to ensure that the second guide shaft 9131 is subjected to uniform force during movement. The end of the second guide shaft 9131 away from the shaft connecting block 9132 is the larger end, and a rubber limiting buffer block is provided at the larger end. The limiting buffer block can contact the second linear bearing 9112 to form a buffer.

[0084] Furthermore, the second linear module 9141 is also equipped with a stroke sensor 9145. There are two stroke sensors 9145, which are arranged along the length of the second linear module 9141. The stroke sensors 9145 are used to detect the position of the second linear module 9141. A door closing sensor 9111 is installed on one side of the cavity 911. The door closing sensor 9111 is used to detect the state of the door panel 912.

[0085] Furthermore, the second linear module 9141 is also equipped with two stroke sensors 9145, arranged along the length of the second linear module 9141. These stroke sensors 9145 detect the position of the second linear module 9141. When a stroke sensor 9145 moves below the connecting plate 9144, its position is detected and converted into an electrical signal, which is then transmitted to the control system to control the second drive motor 9142. During installation, the cavity 911 is fixed to the vacuum reflow oven frame 9. When the second linear module 9141 is working, it can move relative to the cavity 911, thereby moving the end door panel 912. A door closing sensor 9111 detects the state of the door panel 912. When the door panel 912 is moved by the second linear module 9141 to the door closing sensor 9111, the sensor detects whether the door panel 912 is closed. Both the door closing sensor 9111 and the stroke sensors 9145 are photoelectric sensors, and commercially available photoelectric sensors can be used.

[0086] Furthermore, two hanging plates 9121 are fixed to the side of the door panel 912 near the cavity 911. The two hanging plates 9121 are arranged parallel to each other, and the space between the two hanging plates 9121 is used to place the chip fixture 915. A top cover 9113 is hinged to the upper part of the cavity 911. The top cover 9113 has several threaded holes circumferentially formed. The side of the cavity 911 facing the top cover 9113 has threaded holes corresponding to the threaded holes of the top cover 9113. The hanging plates 9121 adopt a strip plate structure, and the opposite sides of the two hanging plates 9121 have snap-fit ​​parts for supporting the chip fixture 915.

[0087] In this embodiment, hinges 9114 are fixed on both sides of the cavity 911, such as... Figure 9 As shown, the hinge 9114 can be fixed to one end of the cavity 911 where the connecting plate 9144 is installed, which facilitates the opening and closing of the upper cover 9113 without colliding with other structures of the equipment. The upper cover 9113 is hinged to the upper cover 9113 via the hinge 9114, and the upper cover 9113 is also connected to the cavity 911 via bolts. A sealing ring is provided on the upper part of the cavity 911 or on the side of the upper cover 9113 near the cavity 911, thereby improving the sealing performance. The freely detachable upper cover 9113 of the furnace cavity 91 retains the easy installation, maintenance, and cleaning characteristics of the top-hinged cavity 911.

[0088] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0089] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-chamber vacuum reflow oven, comprising a housing with an operating door, characterized in that: A feed inlet is provided on one side of the casing, and a discharge outlet is provided on the side of the casing opposite to the feed inlet. A frame is installed inside the casing. The frame is equipped with a material conveying system, which includes a multi-segment horizontal conveying mechanism for horizontally conveying materials, and a material lifting mechanism disposed on one side of the multi-segment horizontal conveying mechanism. The multi-segment horizontal conveying mechanism includes a feeding conveyor, a connecting conveyor, and a discharging conveyor arranged in sequence. The frame is provided with at least one pair of furnace chambers along the height direction. The material lifting mechanism is used to lift and transport the material from the connecting conveyor to the corresponding furnace chamber, or to lower the material from the corresponding furnace chamber and place it on the connecting conveyor. The material lifting mechanism includes a lifting component, a moving beam, a gripping component for gripping materials, and a first guide component. The lifting component is drivenly connected to the moving beam, the moving beam can move along the height direction of the lifting component, the moving beam is fixedly connected to the gripping component, and one end of the moving beam is slidably connected to a first guide component. The moving beam is horizontally arranged and the lifting assembly is connected to the middle of the moving beam. There are two gripping assemblies, which are symmetrically arranged on both sides of the lifting assembly. Each gripping assembly includes two pairs of opposing finger cylinders, with space left between the two pairs of finger cylinders for gripping materials. The furnace chamber includes: A cavity with a hollow structure, one side of which is open; A door panel located on one side of the opening of the cavity, the size of which matches the opening; A second guide assembly fixed to both sides of the cavity, the other end of the second guide assembly being fixedly connected to the door panel; the guide assembly includes a second guide shaft, one end of the second guide shaft being fixed to the door panel, and the other end of the second guide shaft extending to one side of the cavity and passing through two second linear bearings fixed on the cavity; and A drive module installed at the bottom of the cavity is also in drive with the door panel. The drive module can drive the door panel to move along the second guide assembly to cover the cavity opening or move away from the opening. The drive module is located on one side of the cavity and includes a second linear module and a second drive motor installed at one end of the second linear module. The end of the second linear module away from the motor is fixed to the door panel. The second linear module is fixed to the bottom of the cavity through a connecting plate.

2. The multi-chamber vacuum reflow oven as described in claim 1, characterized in that, The lifting assembly includes a first linear module and a lifting basket fixed on the moving beam. A first drive motor is installed at one end of the first linear module. A top position sensor and a bottom position sensor are installed in the height direction of the first linear module. The top position sensor is located above the bottom position sensor. The lifting basket is fixed to one side of the moving beam in the direction of movement. The lifting basket is arranged along the length of the moving beam. The finger cylinder is fixed on the lifting basket. The finger cylinders are arranged parallel to each other. The finger cylinder is also equipped with a cylinder stroke sensor.

3. The multi-chamber vacuum reflow oven as described in claim 2, characterized in that, The first guide assembly includes a first guide shaft, a shaft mounting plate, a bearing mounting seat, and a first linear bearing. Both ends of the first guide shaft are fixed to the shaft mounting plate. The first guide shaft is equipped with the first linear bearing, which is connected to the bearing mounting seat. The bearing mounting seat is installed at one end of the moving beam.

4. The multi-chamber vacuum reflow oven as described in any one of claims 1-3, characterized in that, The feeding conveyor, connecting conveyor, and discharging conveyor are all equipped with support devices at their lower parts. The support devices are used to adjust the position or height of the corresponding feeding conveyor, connecting conveyor, or discharging conveyor in the width direction. The support devices include a height adjustment component, a connecting beam, a slide bar, an adjusting block, and a horizontal adjusting screw. The connecting beam has a slide groove along its length direction. The slide bar is slidably arranged in the slide groove. The adjusting blocks are arranged on both sides of the slide bar. The adjusting blocks are fixed to the connecting beam. Each adjusting block is threadedly connected to the horizontal adjusting screw. One end of the horizontal adjusting screw abuts against one side of the slide bar. The height adjustment assembly includes a height adjustment screw and a pad. The height adjustment screw is threadedly connected to the slide bar and is set perpendicular to the slide bar. The pad abuts against the height adjustment screw and is fixedly set at the lower part of the feeding conveyor, connecting conveyor, or discharging conveyor.

5. The multi-chamber vacuum reflow oven as described in claim 4, characterized in that, The feeding conveyor, connecting conveyor, and discharging conveyor each include a conveyor belt motor, a conveyor belt structure, and an intermediate plate. The conveyor belt structures are symmetrically arranged at both ends of the intermediate plate and fixed to both ends of the intermediate plate. The conveyor belt motor is installed on one side of one of the conveyor belt structures and is in transmission cooperation with both conveyor belt structures. The intermediate plate is arranged corresponding to the support device, which is installed at the lower part of the intermediate plate.

6. The multi-chamber vacuum reflow oven as described in claim 5, characterized in that, The feeding conveyor is equipped with two photoelectric sensors along the material conveying direction, the connecting conveyor is equipped with four photoelectric sensors along the material conveying direction, and the discharging conveyor is equipped with two photoelectric sensors along the material conveying direction.

7. The multi-chamber vacuum reflow oven according to claim 6, characterized in that, The second linear module is also equipped with two stroke sensors arranged along the length of the second linear module. The stroke sensors are used to detect the position of the second linear module. A door closing sensor is installed on one side of the cavity. The door closing sensor is used to detect the door panel status.

8. The multi-chamber vacuum reflow oven according to claim 7, characterized in that, Two hanging plates are fixed on the side of the door panel near the cavity. The two hanging plates are arranged parallel to each other and the space between the two hanging plates is used to place the chip fixture. A top cover is hinged to the upper part of the cavity. The top cover has several threaded holes in its circumference. The side of the cavity facing the top cover has threaded holes corresponding to the threaded holes of the top cover.

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