A vacuum chamber structure of a reflow oven

Abstract

The present invention relates to the technical field of reflow soldering furnaces, and specifically to a vacuum chamber structure of a reflow soldering furnace, including a welding furnace chamber for protecting the entire reflow soldering area, arranged on the outside of the vacuum chamber, including an upper chamber furnace and a lower chamber furnace hinged to the upper chamber furnace; a movable vacuum chamber installed on the inner top of the welding furnace chamber for installing a heating component, wherein the movable vacuum chamber is movably connected to seal the vacuum chamber, including a lifting chamber cover, the inner top of the lifting chamber cover is provided with a first reflecting light plate; a fixed vacuum chamber installed on the inner bottom of the welding furnace chamber, used in conjunction with the movable vacuum chamber, and a second reflecting light plate is installed on the inner bottom. The present invention uses the opening and closing method of the reflow soldering furnace to make the device not only convenient for sealing, but also convenient for lifting and opening according to the feeding needs, and can also be opened automatically with the outer shell during maintenance, so as to solve the problems existing in the prior art.

Description

Technical Field

[0001] The invention relates to the technical field of reflow soldering furnaces, and in particular to a vacuum cavity structure of a reflow soldering furnace. Background Art

[0002] The welding in the conventional reflow oven is divided into four action processes, that is, the circuit board with mounted components is transported by the reflow oven rail through the preheating zone, the insulation zone, the welding zone and the cooling zone respectively. After the action of these four temperature zones, a complete welding point is formed, which includes: 1. When the PCB enters the heating zone, the solvent and gas in the solder paste evaporate together, the flux in the solder paste wets the pad, the end and pin of the component, the solder paste softens, collapses and covers the pad, and isolates the pad and the pin of the component from oxygen; 2. When the PCB enters the insulation zone, the PCB and components are fully preheated to prevent the PCB from suddenly entering the high temperature zone of welding and damaging the PCB and components; 3. When the PCB enters the welding zone, the temperature rises rapidly to make the solder paste reach the melting state, and the liquid solder wets, disperses, diffuses or reflows the pad, the end and pin of the PCB to form a solder joint; 4. The PCB enters the cooling zone to condense the solder joint, and the reflow is ended at this time.

[0003] Since the maximum working temperature of the reflow oven is around 230-250℃, nitrogen is usually added to the reflow oven. Nitrogen is one of the inert gases and it is not easy to produce compounds with metals. Then it can avoid the oxidation reaction caused by the contact between oxygen in the air and metal, thereby improving welding ability, enhancing solderability and reducing porosity.

[0004] The reflow oven will use an independent vacuum zone, so its vacuum chamber is also independent, and it needs to have an independent opening function, so that the PCB can be transported into the vacuum chamber through the conveying mechanism inside the vacuum chamber and connected to the front temperature zone conveying mechanism, and after closing the upper cover, efficient heating can be achieved through different heating methods, so as to evacuate the product through vacuum heating, reduce the pores and bubbles in the solder joints, and increase the qualified rate of the product.

[0005] Existing reflow ovens are independently opened and closed, and are sealed. To facilitate sealing, most are opened and closed in a horizontal jacking manner, which is inconvenient for internal maintenance and parts removal.

[0006] Therefore, it is necessary to invent a vacuum chamber structure of a reflow oven to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a vacuum chamber structure of a reflow soldering furnace. Through the opening and closing method of the reflow soldering furnace, the device is not only convenient for sealing, but also convenient for lifting and opening according to feeding needs. During maintenance, it can be opened automatically with the shell, so as to solve the problems existing in the prior art.

[0008] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vacuum chamber structure of a reflow soldering furnace, comprising a welding furnace chamber, which is used to protect the entire reflow soldering area and is arranged on the outside of the vacuum chamber, and comprises an upper chamber furnace and a lower chamber furnace hinged to the upper chamber furnace; a movable vacuum chamber, which is installed on the inner top of the welding furnace chamber and is used to install a heating component, wherein the movable vacuum chamber is movably connected to seal the vacuum chamber, and comprises a lifting chamber cover, and the inner top of the lifting chamber cover is provided with a reflecting light plate 1; a fixed vacuum chamber, which is installed on the inner bottom of the welding furnace chamber and is used in conjunction with the movable vacuum chamber, and the inner bottom is provided with a reflecting light plate 2 , including a lifting cavity corresponding to the lifting cavity cover; a transport component, arranged inside the movable vacuum cavity, for transporting the PCB board, including a first side plate and a second side plate symmetrically arranged with the first side plate; a width adjustment component, arranged on the side of the transport component, for adjusting the width of the transport component, including a servo motor installed inside the lifting cavity; two groups of length adjustment components are provided, which are respectively installed inside the first side plate and the second side plate, each group is provided with two, and the two length adjustment components are symmetrically distributed; a conveying power component is installed on one side of the lifting cavity and is connected with the lifting cavity, including an air inlet.

[0009] As a preferred scheme of the present invention, the bottom of the upper chamber furnace is hinged with the lower chamber furnace, and a movable space is provided at the connection between the upper chamber furnace and the lower chamber furnace on one side of the hinge axis, and a longitudinal slide groove is provided on the inner wall of the upper chamber furnace, and a crossbeam is slidably connected to the interior of the upper chamber furnace, and both ends of the crossbeam are fixedly connected with longitudinal sliders, and the longitudinal slider is located inside the longitudinal slide groove and is slidably connected to the longitudinal slide groove, and a transverse slide groove is provided inside the crossbeam, and the side of the lifting chamber cover is threadedly connected with mounting screws, and the lifting chamber cover is detachably connected to a connecting block by the mounting screws, and a transverse slider is provided on the top of the connecting block, and the transverse slider is located inside the transverse slide groove and is slidably connected to the transverse slide groove.

[0010] The top of described lifting body has the advantages that: the lifting of lifting power is 40-50, and the lower limit of that is 40-50.The lower limit of the lifting power is 40-50.The lower limit of the lifting power is 40-50.The lower limit of the lifting power is 40-50.

[0011] As a preferred solution of the present invention, the first side panel and the second side panel have the same structure and are both slidably connected to the lifting cavity, the tops of the first side panel and the second side panel are fixedly connected with slide rails, one end of the slide rail is provided with a fixed joint, and the other end is provided with a movable joint, the ends of the fixed joint and the movable joint are rotatably connected with a rotating shaft, the side of the rotating shaft is provided with a mounting block, the interiors of the slide rails, the fixed joints and the movable joints are all provided with movable grooves, an electric push rod is installed between the slide rails and the movable joints, the interiors of the movable joints and the slide rails are provided with sliding holes, the interiors of the sliding holes are slidably connected with sliding rods, and the interiors of the movable grooves are slidably connected with conveyor belts.

[0012] As a preferred solution of the present invention, square grooves are provided at both ends of the inner sides of the first side plate and the second side plate, a movable sliding rod is fixedly connected to the inside of the square groove, a movable sleeve is slidably connected to the outer side of the movable sliding rod, an elastic member is fixedly connected to one side of the movable sleeve, the elastic member is sleeved on the outer side of the movable sliding rod, the movable sleeve is slidably connected to the square groove, a rotating wheel is rotatably connected to the inner side of the movable sleeve, a guide wheel is provided on the upper side of the rotating wheel, and the guide wheel and the rotating wheel both cooperate with the conveyor belt.

[0013] As a preferred solution of the present invention, a servo motor is installed inside the lifting cavity, and a screw rod is fixedly connected to the output end of the servo motor. The screw rod is threadedly connected to the first side plate and the second side plate. A limit rod is fixedly connected to the inside of the lifting cavity, and the limit rod is slidably connected to the first side plate and the second side plate.

[0014] As a preferred solution of the present invention, one end of the lifting chamber away from the limiting slide rail is connected to the air inlet, the end flange of the air inlet is connected to a connecting pipe, the end of the connecting pipe is installed with an external pipe, a valve is installed inside the external pipe, a first connecting port is installed on the side of the lifting chamber located on the side of the conveying power component, and a second connecting port, a third connecting port and an air outlet are installed on the side of the lifting chamber away from the conveying power component.

[0015] As a preferred solution of the present invention, a first electrical connection block is installed on the side of the lifting chamber cover, a heating pipe is installed on the output end of the first electrical connection block, a first mounting angle plate is fixedly connected to the top of the lifting chamber cover, the first mounting angle plate is detachably connected to the heating pipe, and the heating pipe is arranged to be curved.

[0016] As a preferred solution of the present invention, a second electrical connection block is installed on the side of the lifting chamber cover, a heating wire is installed at the output end of the second electrical connection block, a second mounting angle plate is fixedly connected to the top of the lifting chamber cover, the second mounting angle plate is detachably connected to the heating wire, and the heating wire is arranged to be curved.

[0017] As a preferred solution of the present invention, a third point connection block is installed inside the lifting cavity cover, and a plurality of infrared heating tubes are installed at the end of the third point connection block, and the plurality of infrared heating tubes are equidistantly distributed.

[0018] In the above technical solution, compared with the prior art, the technical effects and advantages provided by the present invention are as follows:

[0019] 1. During maintenance, the user rotates the upper chamber furnace. Since the upper chamber furnace is hinged with the lower chamber furnace, the upper chamber furnace can be rotated and opened, wherein the upper chamber furnace drives the crossbeam to rotate synchronously, wherein the crossbeam is slidably connected with the lifting chamber cover, and can provide the lifting chamber cover with movable compensation space to prevent the device from causing interference during movement. When it is necessary to heat the internal PCB board, the electric push rod drives the crossbeam to rise and fall, so that the protrusion at the bottom of the lifting chamber cover is engaged with the groove at the top of the lifting chamber body, wherein a sealing strip is provided between the protrusion and the groove, which is convenient for sealing the cavity. When lifting and opening and closing, the limit slider on the side of the lifting chamber cover slides on the side of the lifting chamber cover, which is convenient for limiting the lifting chamber cover and preventing deviation. In order to cooperate with the installation, the user can adjust the position of the limit slide rail and the limit slider according to needs, and the limit slider is cylindrically arranged, which can both slide and rotate inside the limit slide groove.

[0020] 2. In order to expand the scope of application, the servo motor can be started to drive the screw to rotate, and the screw makes the two first side plates and the second side plates move inward, wherein the corresponding two conveying rods are slidably connected, and the two conveyor belts are close to each other for the convenience of adjusting the overall transportation width, thereby expanding the scope of application. The movable joint can also be driven away from the slide rail by the electric push rod, thereby driving the conveyor belt to move, wherein the conveyor belt is tightened to pull the rotating wheel to move, and the rotating wheel drives the movable sleeve to slide on the inner wall of the square groove, wherein the movable sleeve slides closely on the outer side of the movable slide rod, and under the action of the elastic member, the conveyor belt can be tensioned and automatically reset, thereby expanding the length of the transportation stroke.

[0021] 3. Hot air heating, heating tube heating, heating wire heating and infrared heating can all be used. You only need to replace the heating component, and the replacement method is simple and quick. It can be replaced as needed, and has a wider range of applications;) Among them, the hot air heating method, the heating device is far away from the product, safe when used, easy to install and replace, stable heating, and small temperature fluctuations;) The heating tube heats steadily, the temperature fluctuations are small, the overall insulation package is very safe to use, the product structure is firm, the material is strong and easy to transport and use;) The heating wire heats quickly, the temperature rises quickly, the temperature control response speed is fast, the temperature control accuracy is high, and the price is cheap;) Infrared heating is rapid, the temperature rises quickly, the overall insulation package is very safe to use, and the price is cheap. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the welding furnace and the movable vacuum chamber of the present invention;

[0025] Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle;

[0026] Figure 4 For the present invention Figure 2 Schematic diagram of the main view structure;

[0027] Figure 5 For the present invention Figure 2 Schematic diagram of the structure from the middle side;

[0028] Figure 6 It is a schematic diagram of the fixed vacuum chamber structure of the present invention;

[0029] Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle;

[0030] Figure 8 For the present invention Figure 6 The enlarged structural diagram at C in the middle;

[0031] Fig. 9 For the present invention Figure 6 Schematic diagram of the structure from top view;

[0032] Fig.10 It is a schematic diagram of the three-dimensional structure of the first side panel of the present invention;

[0033] Fig.11 It is a schematic diagram of the connection structure between the conveyor belt and the rotating wheel of the present invention;

[0034] Fig.12 This is a schematic diagram of the heating pipeline structure of the second embodiment of the present invention;

[0035] Fig.13 It is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention;

[0036] Fig.14 This is a schematic diagram of the heating wire structure of the third embodiment of the present invention;

[0037] Fig.15 This is a schematic diagram of the three-dimensional structure of the third embodiment of the present invention;

[0038] Fig.16 It is a schematic diagram of the three-dimensional structure of the fourth embodiment of the present invention;

[0039] Fig.17 This is a schematic diagram of the structure of an infrared heating tube according to a fourth embodiment of the present invention;

[0040] Fig.18 For the fourth embodiment of the present invention Fig.16 Enlarged structural diagram at D in the middle.

[0041] Description of reference numerals:

[0042] 001, welding furnace; 002, movable vacuum chamber; 003, fixed vacuum chamber; 004, transportation component; 005, width adjustment component; 006, length adjustment component; 007, conveying power component;

[0043] 101. upper chamber furnace; 102. lower chamber furnace; 103. activity space; 104. longitudinal slide; 105. crossbeam; 106. longitudinal slide block;

[0044] 201, lifting chamber cover; 202, mounting screws; 203, connecting block; 204, upper adjustment rod; 205, upper screw rod; 206, upper fixing rod; 207, limit slider; 208, bump;

[0045] 301, lifting cavity; 302, lower fixing rod; 303, lower screw rod; 304, lower adjusting rod; 305, limiting slide rail; 306, limiting slide groove; 307, groove;

[0046] 401, first side plate; 402, second side plate; 403, fixed joint; 404, movable joint; 405, movable groove; 406, conveyor belt; 407, rotating shaft; 408, mounting block;

[0047] 501, servo motor; 502, screw rod; 503, limit rod; 504, sliding hole;

[0048] 601, movable sleeve; 602, elastic member; 603, movable slide rod; 604, square groove; 605, rotating wheel; 606, guide wheel;

[0049] 701, air inlet; 702, connecting pipe; 703, external pipe; 704, first connecting port; 705, second connecting port; 706, third connecting port; 707, air outlet;

[0050] 801. first electrical connection block; 802. heating pipe; 803. first mounting angle plate;

[0051] 901, second electrical connection block; 902, heating wire; 903, second mounting angle plate;

[0052] 1001, the third point connection block; 1002, the infrared heating tube. DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0054] Embodiment 1:

[0055] The present invention provides Figure 1-11The vacuum chamber structure of a reflow oven shown in the figure includes a welding furnace chamber 001, which is used to protect the entire reflow area and is arranged on the outside of the vacuum chamber, including an upper chamber furnace 101 and a lower chamber furnace 102 hinged to the upper chamber furnace 101; a movable vacuum chamber 002, which is installed on the inner top of the welding furnace chamber 001 and is used to install a heating component, wherein the movable vacuum chamber 002 is movably connected to seal the vacuum chamber, and includes a lifting chamber cover 201, and the inner top of the lifting chamber cover 201 is provided with a reflecting light plate 1; a fixed vacuum chamber 003, which is installed on the inner bottom of the welding furnace chamber 001 and is used in conjunction with the movable vacuum chamber 002, and the inner bottom is provided with a reflecting light plate 2, and includes a lifting chamber 3 corresponding to the lifting chamber cover 201 01; a transport component 004, which is arranged inside the movable vacuum chamber 002 and is used to transport the PCB board, and includes a first side plate 401 and a second side plate 402 symmetrically arranged with respect to the first side plate 401; a width adjustment component 005, which is arranged on the side of the transport component 004 and is used to adjust the width of the transport component 004, and includes a servo motor 501 installed inside the lifting chamber 301; two groups of length adjustment components 006 are provided, which are respectively installed inside the first side plate 401 and the second side plate 402, and each group is provided with two, and the two length adjustment components 006 are symmetrically distributed; a conveying power component 007, which is installed on one side of the lifting chamber 301 and is connected with the lifting chamber 301, and includes an air inlet 701.

[0056] In the structure, when in use, the user can drive the movable vacuum chamber 002 to rotate to the top of the fixed vacuum chamber 003 and correspond to the fixed vacuum chamber 003 by closing the welding furnace 001. When the movable vacuum chamber 002 is opened, the movable vacuum chamber 002 is opened synchronously with the welding furnace 001, so that the parts inside the fixed vacuum chamber 003 and the movable vacuum chamber 002 can be replaced or repaired.

[0057] When heating and welding the device, the device needs to be sealed first. Therefore, the PCB board can be input into the interior of the fixed vacuum chamber 003, and then the movable vacuum chamber 002 is driven to descend, so that a sealed chamber is formed between the movable vacuum chamber 002 and the fixed vacuum chamber 003, and then the air inside is sucked to make the interior in a vacuum state, and then nitrogen is filled into the vacuum chamber through the conveying power component 007. Nitrogen is a kind of inert gas. It is not easy to produce compounds with metals. It can avoid oxidation reactions caused by contact between oxygen in the air and metals, thereby improving welding ability, enhancing solderability and reducing porosity. Users can preheat nitrogen and fill the preheated nitrogen through negative pressure. In the nitrogen heating method, the heating device is far away from the product, which is safe to use, easy to install and replace, stable heating, and small temperature fluctuations.

[0058] As a further optimization of the present invention, the bottom of the upper chamber furnace 101 is hinged with the lower chamber furnace 102, and a movable space 103 is provided at the connection between the upper chamber furnace 101 and the lower chamber furnace 102 on one side of the hinge axis, and a longitudinal slide groove 104 is provided on the inner wall of the upper chamber furnace 101, and a crossbeam 105 is slidably connected inside the upper chamber furnace 101, and longitudinal sliders 106 are fixedly connected at both ends of the crossbeam 105, and the longitudinal slider 106 is located inside the longitudinal slide groove 104 and is slidably connected to the longitudinal slide groove 104, and a transverse slide groove is provided inside the crossbeam 105, and the side of the lifting chamber cover 201 is threadedly connected with mounting screws 202, and the lifting chamber cover 201 is detachably connected with a connecting block 203 through the mounting screws 202, and a transverse slider is provided on the top of the connecting block 203, and the transverse slider is located inside the transverse slide groove and is slidably connected to the transverse slide groove;

[0059] When in use, the user rotates the upper chamber furnace 101. Since the upper chamber furnace 101 is hinged with the lower chamber furnace 102, the upper chamber furnace 101 can be rotated and opened, wherein the upper chamber furnace 101 drives the cross beam 105 to rotate synchronously, wherein the cross beam 105 is slidably connected with the lifting chamber cover 201, which can provide the lifting chamber cover 201 with movable compensation space to prevent the device from causing interference during movement.

[0060] In the above structure, both sides of the lifting cavity 301 are provided with limit rails 305, and the insides of the two limit rails 305 are provided with limit slots 306. Both sides of the lifting cavity cover 201 are provided with limit sliders 207, and the limit sliders 207 are set in a cylindrical shape. The limit sliders 207 are located inside the limit slots 306 and are slidably connected with the limit slots 306. The side of the lifting cavity cover 201 is fixedly connected with an upper fixing rod 206, and the inside of the upper fixing rod 206 is slidably connected with an upper adjusting rod 204, and the upper adjusting rod 204 is connected with the upper fixing rod 206. 06, the bottom of the upper adjusting rod 204 is fixedly connected to the limiting slide block 207, the two sides of the lifting cavity 301 are fixedly connected to the lower fixing rods 302, the side of the lower fixing rod 302 is slidably connected to the lower adjusting rod 304, the lower fixing rod 302 and the lower adjusting rod 304 are threadedly connected to the lower screw rod 303, the lower screw rod 303 is fixedly connected to the limiting slide rail 305, the bottom of the lifting cavity cover 201 is fixedly connected to the protrusion 208, and the top of the lifting cavity 301 is provided with a groove 307 corresponding to the protrusion 208;

[0061] During use, when it is necessary to heat the internal PCB board, the user can start the electric push rod installed on the top of the crossbeam 105 after the PCB board enters the movable vacuum chamber 002 and the fixed vacuum chamber 003, so as to drive the crossbeam 105 to move up and down, so that the crossbeam 105 drives the lifting chamber cover 201 to move up and down through the connecting block 203, so that the protrusion 208 at the bottom of the lifting chamber cover 201 is engaged with the groove 307 at the top of the lifting chamber 301, wherein a sealing strip is arranged between the protrusion 208 and the groove 307, so as to facilitate the sealing of the chamber. When lifting and opening and closing, the limiting slider 207 on the side of the lifting chamber cover 201 slides on the side of the lifting chamber 301, so as to facilitate the limiting of the lifting chamber cover 201 and prevent it from deflecting.

[0062] In order to facilitate the installation, the user can adjust the position of the limit slide rail 305 and the limit slider 207 as needed. The user can slide the upper adjustment rod 204 to make it slide inside the upper fixed rod 206, wherein the upper adjustment rod 204 drives the limit slider 207 to move, and then fix the upper adjustment rod 204 through the upper screw rod 205 to complete the position adjustment of the limit slider 207. Similarly, by sliding the lower fixed rod 302, the lower fixed rod 302 slides inside the lower adjustment rod 304, and the limit slider 207 is adjusted. The slide rail 305 moves with the lower fixed rod 302, thereby adjusting the position of the limit slide rail 305, wherein the limit slide groove 306 inside the limit slide rail 305 cooperates with the limit slider 207, and the limit slider 207 is cylindrically arranged, which can both slide and rotate inside the limit slide groove 306. When feeding is required, the electric push rod drives the lifting chamber cover 201 to rise, allowing the material to enter. When heating is required, the electric push rod drives the lifting chamber cover 201 to descend to close the cavity.

[0063] Further, the first side plate 401 and the second side plate 402 have the same structure and are both slidably connected to the lifting chamber 301. The tops of the first side plate 401 and the second side plate 402 are fixedly connected with a slide rail, one end of the slide rail is provided with a fixed joint 403, and the other end is provided with a movable joint 404. The ends of the fixed joint 403 and the movable joint 404 are rotatably connected with a rotating shaft 407, and a mounting block 408 is provided on the side of the rotating shaft 407. The insides of the slide rail, the fixed joint 403 and the movable joint 404 are all provided with a movable groove 405, an electric push rod is installed between the slide rail and the movable joint 404, and the insides of the movable joint 404 and the slide rail are provided with a sliding hole 504, the inside of the sliding hole 504 is slidably connected with a sliding rod, and the inside of the movable groove 405 is slidably connected with a conveyor belt 406;

[0064] When in use, the PCB board needs to be transported to the inside of the movable vacuum chamber 002, so it is necessary to install a transportation component for transporting the PCB board, wherein a conveyor belt is arranged inside the movable groove 405, and conveyor rods are rotatably connected to the inner sides of the fixed joint 403 and the movable joint 404, one of the conveyor rods is driven by a motor, and the conveyor rods on the first side plate 401 and the second side plate 402 correspond to each other one by one, and the two corresponding conveyor rods are slidably connected, and the conveyor belt is sleeved on the outer side of the conveyor rod. When in use, the motor drives one of the conveyor rods to rotate, and the conveyor rod drives the conveyor belt to move, and the conveyor belt drives the PCB board on its top to move. During the transportation of the conveyor belt, the movable groove 405 needs to be moved inside and then limited, and the rotating shaft 407 can limit the PCB board.

[0065] In further optimization of the above embodiment, square grooves 604 are provided at both ends of the inner sides of the first side plate 401 and the second side plate 402, a movable slide rod 603 is fixedly connected inside the square groove 604, a movable sleeve 601 is slidably connected to the outer side of the movable slide rod 603, an elastic member 602 is fixedly connected to one side of the movable sleeve 601, the elastic member 602 is sleeved on the outer side of the movable slide rod 603, the movable sleeve 601 is slidably connected to the square groove 604, a rotating wheel 605 is rotatably connected to the inner side of the movable sleeve 601, a guide wheel 606 is provided on the upper side of the rotating wheel 605, and both the guide wheel 606 and the rotating wheel 605 cooperate with the conveyor belt 406;

[0066] When it is necessary to adjust the length of the transport stroke, the user drives the movable joint 404 to move through the electric push rod, thereby adjusting the distance between the two conveying rods, and then adjusting the length of the movable groove 405. When extension is required, the electric push rod drives the movable joint 404 away from the slide rail, thereby driving the transport belt 406 to move, wherein the transport belt 406 is tightened to pull the rotating wheel 605 to move, and the rotating wheel 605 drives the movable sleeve 601 to slide on the inner wall of the square groove 604, wherein the movable sleeve 601 slides closely on the outer side of the movable sliding rod 603, and under the action of the elastic member 602, the transport belt 406 can be tensioned and automatically reset.

[0067] A servo motor 501 is installed inside the lifting cavity 301, and a screw rod 502 is fixedly connected to the output end of the servo motor 501, and the screw rod 502 is threadedly connected to the first side plate 401 and the second side plate 402. A limit rod 503 is fixedly connected inside the lifting cavity 301, and the limit rod 503 is slidably connected to the first side plate 401 and the second side plate 402;

[0068] When the width of the conveyor belt needs to be adjusted, the user can start the servo motor 501 to drive the screw rod 502 to rotate, and the screw rod 502 makes the two first side plates 401 and the second side plates 402 move inward, wherein the corresponding two conveying rods are slidingly connected, and the two conveyor belts are close to each other to facilitate the adjustment of the overall transportation width, thereby expanding the scope of application.

[0069] In the above structure, one end of the lifting cavity 301 away from the limiting slide rail 305 is connected to the air inlet 701, and the end flange of the air inlet 701 is connected with a connecting pipe 702 for easy installation and disassembly, and an external pipe 703 is installed at the end of the connecting pipe 702, and a valve is installed inside the external pipe 703 for easy switching, and a first connecting port 704 is installed on the side of the lifting cavity 301 located on the side of the conveying power component 007, which is convenient for electrical connection with internal parts through the first connecting port 704, and a second connecting port 705 and a third connecting port 706 and an air outlet 707 are installed on the side of the lifting cavity 301 away from the conveying power component 007, wherein the second connecting port 705 and the third connecting port 706 are for electrical connection, and the air outlet 707 is used to suck the air inside;

[0070] When in use, hot air heating is adopted. The user draws out the internal air through the air outlet 707, fills nitrogen into the cavity through the air inlet 701, heats the nitrogen by heating components outside the device, and then fills the heated nitrogen into the cavity to heat the device.

[0071] Reflective light board 1 can reflect light and heat. When used together with reflective light board 2, it can make full use of the heat and make the heating more uniform.

[0072] Embodiment 2:

[0073] The difference from the first embodiment is that: a heating tube is used for heating, such as Figure 12-13 As shown, a first electrical connection block 801 is installed on the side of the lifting chamber cover 201, a heating pipe 802 is installed at the output end of the first electrical connection block 801, a first mounting angle plate 803 is fixedly connected to the top of the lifting chamber cover 201, the first mounting angle plate 803 is detachably connected to the heating pipe 802, and the heating pipe 802 is set to be curved;

[0074] During installation, after the movable vacuum chamber 002 is opened by welding the furnace 001, the heating pipe 802 can be installed on the inner top of the lifting chamber cover 201 through the first installation angle plate 803, and the heating pipe 802 is electrically connected to the first electrical connection block 801, which is convenient for installation. The heating pipe heats smoothly with small temperature fluctuations. The overall insulation package is very safe to use. The product structure is firm and the material is strong, which is easy to transport and use.

[0075] Embodiment three:

[0076] The difference from the first embodiment is that heating wire is used for heating, such as Figure 14-15 As shown, a second electrical connection block 901 is installed on the side of the lifting chamber cover 201, a heating wire 902 is installed on the output end of the second electrical connection block 901, a second mounting angle plate 903 is fixedly connected to the top of the lifting chamber cover 201, the second mounting angle plate 903 is detachably connected to the heating wire 902, and the heating wire 902 is arranged to be curved.

[0077] During installation, after the movable vacuum chamber 002 is opened by welding the furnace 001, the heating wire 902 can be installed on the inner top of the lifting chamber cover 201 through the second installation angle plate 903, and the heating wire 902 is electrically connected to the second electrical connection block 901, which is convenient for installation, and the heating wire heats up quickly, the temperature rises quickly, the temperature control response speed is fast, the temperature control accuracy is high, and the price is low.

[0078] Embodiment 4:

[0079] The difference from the first embodiment is that infrared heating is used, such as Figure 16-18 As shown, a third point connection block 1001 is installed inside the lifting chamber cover 201, and a plurality of infrared heating tubes 1002 are installed at the end of the third point connection block 1001, and the plurality of infrared heating tubes 1002 are distributed at equal distances;

[0080] During installation, after the movable vacuum chamber 002 is opened by welding the furnace 001, the third point connection block 1001 is then installed on the inner top of the lifting chamber cover 201, and the infrared heating tube 1002 is evenly installed inside the third point connection block 1001, so that multiple third point connection blocks 1001 are connected in parallel for easy installation. The infrared heating is rapid and the temperature rises quickly. The overall insulation package is very safe to use and is inexpensive.

[0081] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A vacuum chamber structure of a reflow oven, characterized in that: include A welding furnace (001) is used to protect the entire reflow soldering area and is arranged outside the vacuum chamber, comprising an upper furnace (101) and a lower furnace (102) hinged to the upper furnace (101); A movable vacuum chamber (002) is installed on the inner top of the welding furnace (001) and is used to install the heating component, wherein the movable vacuum chamber (002) is movably connected to seal the vacuum chamber, and comprises a lifting chamber cover (201), wherein the inner top of the lifting chamber cover (201) is provided with a light reflecting plate 1; A fixed vacuum chamber (003) is installed at the inner bottom of the welding furnace (001) and is used in conjunction with the movable vacuum chamber (002). A second light reflecting plate is installed at the inner bottom, and the chamber includes a lifting chamber (301) corresponding to the lifting chamber cover (201); A transport component (004) is arranged inside the movable vacuum chamber (002) and is used to transport the PCB board, comprising a first side plate (401) and a second side plate (402) symmetrically arranged with respect to the first side plate (401); A width adjustment component (005) is arranged on the side of the transport component (004) and is used to adjust the width of the transport component (004), and includes a servo motor (501) installed inside the lifting cavity (301); Two groups of length adjustment components (006) are provided, which are respectively installed inside the first side plate (401) and the second side plate (402), and each group is provided with two, and the two length adjustment components (006) are symmetrically distributed; A conveying power assembly (007), which is installed on one side of the lifting cavity (301) and communicates with the lifting cavity (301), and includes an air inlet (701); Limiting rails (305) are provided on both sides of the lifting cavity (301), and limiting grooves (306) are provided inside the two limiting rails (305). Limiting sliders (207) are provided on both sides of the lifting cavity cover (201), and the limiting sliders (207) are configured as cylindrical, and the limiting sliders (207) are located inside the limiting grooves (306) and are slidably connected to the limiting grooves (306). An upper fixing rod (206) is fixedly connected to the side of the lifting cavity cover (201), and an upper adjusting rod (204) is slidably connected inside the upper fixing rod (206), and the upper adjusting rod (204) and the upper fixing rod (206) are connected to each other. An upper screw rod (205) is threadedly connected between the upper and lower adjustment rods (204), the bottom of the upper adjustment rod (204) is fixedly connected to the limiting sliding block (207), lower fixing rods (302) are fixedly connected to both sides of the lifting cavity (301), the side of the lower fixing rod (302) is slidably connected to the lower adjustment rod (304), a lower screw rod (303) is threadedly connected between the lower fixing rod (302) and the lower adjustment rod (304), the lower screw rod (303) is fixedly connected to the limiting sliding rail (305), a protrusion (208) is fixedly connected to the bottom of the lifting cavity cover (201), and a groove (307) corresponding to the protrusion (208) is provided on the top of the lifting cavity (301).

2. The vacuum chamber structure of a reflow oven according to claim 1, characterized in that: The bottom of the upper chamber furnace (101) is hingedly connected to the lower chamber furnace (102); a movable space (103) is arranged at one side of the hinge axis at the connection between the upper chamber furnace (101) and the lower chamber furnace (102); a longitudinal sliding groove (104) is provided on the inner wall of the upper chamber furnace (101); a crossbeam (105) is slidably connected inside the upper chamber furnace (101); longitudinal sliding blocks (106) are fixedly connected at both ends of the crossbeam (105); and the longitudinal sliding blocks (106) are located The interior of the longitudinal slide groove (104) is slidably connected to the longitudinal slide groove (104), the interior of the crossbeam (105) is provided with a transverse slide groove, the side of the lifting chamber cover (201) is threadedly connected with a mounting screw (202), the lifting chamber cover (201) is detachably connected with a connecting block (203) through the mounting screw (202), and a transverse sliding block is arranged on the top of the connecting block (203), and the transverse sliding block is located inside the transverse slide groove and is slidably connected to the transverse slide groove.

3. The vacuum chamber structure of a reflow oven according to claim 1, characterized in that: The first side plate (401) and the second side plate (402) have the same structure and are both slidably connected to the lifting chamber (301); the tops of the first side plate (401) and the second side plate (402) are fixedly connected with a slide rail; one end of the slide rail is provided with a fixed joint (403) and the other end is provided with a movable joint (404); the ends of the fixed joint (403) and the movable joint (404) are rotatably connected with a rotating shaft (407); the side of the rotating shaft (407) is provided with a mounting block (408); the interiors of the slide rail, the fixed joint (403) and the movable joint (404) are all provided with a movable groove (405); an electric push rod is installed between the slide rail and the movable joint (404); the interiors of the movable joint (404) and the slide rail are both provided with a sliding hole (504); the interior of the sliding hole (504) is slidably connected with a sliding rod; the interior of the movable groove (405) is slidably connected with a conveyor belt (406).

4. The vacuum chamber structure of a reflow oven according to claim 1, characterized in that: Both ends of the inner sides of the first side plate (401) and the second side plate (402) are provided with square grooves (604), the interior of the square grooves (604) is fixedly connected with a movable sliding rod (603), the outer side of the movable sliding rod (603) is slidably connected with a movable sleeve (601), one side of the movable sleeve (601) is fixedly connected with an elastic member (602), the elastic member (602) is sleeved on the outer side of the movable sliding rod (603), the movable sleeve (601) is slidably connected to the square grooves (604), the inner side of the movable sleeve (601) is rotatably connected with a rotating wheel (605), a guide wheel (606) is provided on the upper side of the rotating wheel (605), and the guide wheel (606) and the rotating wheel (605) are both matched with the conveyor belt (406).

5. The vacuum chamber structure of a reflow oven according to claim 1, characterized in that: A servo motor (501) is installed inside the lifting cavity (301), and a lead screw (502) is fixedly connected to the output end of the servo motor (501), and the lead screw (502) is threadedly connected to the first side plate (401) and the second side plate (402). A limit rod (503) is fixedly connected inside the lifting cavity (301), and the limit rod (503) is slidably connected to the first side plate (401) and the second side plate (402).

6. The vacuum chamber structure of a reflow oven according to claim 1, characterized in that: One end of the lifting chamber (301) away from the limiting slide rail (305) is connected to the air inlet (701); the end flange of the air inlet (701) is connected to a connecting pipe (702); the end of the connecting pipe (702) is installed with an external pipe (703); a valve is installed inside the external pipe (703); a first connecting port (704) is installed on the side of the lifting chamber (301) located on the side of the conveying power component (007); a second connecting port (705), a third connecting port (706) and an air outlet (707) are installed on the side of the lifting chamber (301) away from the conveying power component (007).

7. The vacuum chamber structure of a reflow oven according to claim 1, characterized in that: A first electrical connection block (801) is installed on the side of the lifting chamber cover (201), a heating pipe (802) is installed at the output end of the first electrical connection block (801), a first mounting angle plate (803) is fixedly connected to the top of the lifting chamber cover (201), the first mounting angle plate (803) is detachably connected to the heating pipe (802), and the heating pipe (802) is arranged to be curved.

8. The vacuum chamber structure of a reflow oven according to claim 1, characterized in that: A second electrical connection block (901) is installed on the side of the lifting chamber cover (201), a heating wire (902) is installed at the output end of the second electrical connection block (901), a second mounting angle plate (903) is fixedly connected to the top of the lifting chamber cover (201), the second mounting angle plate (903) is detachably connected to the heating wire (902), and the heating wire (902) is arranged to be curved.

9. The vacuum chamber structure of a reflow oven according to claim 1, characterized in that: A third point connection block (1001) is installed inside the lifting chamber cover (201), and a plurality of infrared heating tubes (1002) are installed at the end of the third point connection block (1001), and the plurality of infrared heating tubes (1002) are distributed at equal distances.

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