A welding device and a welding method for semiconductor heating plate production

Abstract

The present invention discloses a welding device and a welding method for semiconductor heating plate production, which relates to the field of welding devices. It includes a welding box, in which a horizontal moving component is arranged. A vertical moving component is arranged on the horizontal moving component, and a welding component is arranged on the vertical moving component. The vertical moving component can drive the welding component to move vertically, and the horizontal moving component can drive the vertical moving component and the welding component to move horizontally. The welding component includes a welding shell, a negative pressure unit and a heating unit, and the negative pressure unit and the heating unit are arranged in the welding shell. Ensure that the electrical components are closely attached to the circuit board, improve the welding effect, enable the electrical components to be welded on the circuit board in a vacuum environment, help the solder to melt and discharge the internal bubbles, make the welding more firm, improve the electrical performance after welding, reduce the oxidation degree of welding, improve the welding quality. At the same time, the harmful gases generated during the welding process are extracted through the movable pipe, reducing air pollution and protecting human safety.

Description

Technical Field

[0001] The present invention relates to the field of welding equipment, and particularly to a welding equipment and a welding method for the production of semiconductor heating plates. Background Art

[0002] Circuit board welding is the process of connecting electronic components to a printed circuit board (PCB), which generally includes the following basic steps: cleaning the surface of the PCB to ensure there is no oil or oxide; preparing the required electronic components and welding tools; applying a soldering flux: applying a soldering flux on the pads of the PCB to help the solder flow and adhere better; placing the components: placing the electronic components at the corresponding positions on the PCB and ensuring that the pins are aligned with the pads; and welding: heating to melt the solder so that it flows into the gap between the pins and the pads to form solder joints.

[0003] A heating plate is a device that converts electrical energy into heat energy, usually composed of a heating element, a housing material, a control element, a connecting wire, a plug, etc. Its basic principle is to convert electrical energy into heat energy through a heating element (such as a resistance wire, a heating tube, an electrothermal film, etc.), and then transfer the heat to the object to be heated through heat conduction. The control circuit board in the production process of the heating plate needs to be processed using welding equipment.

[0004] Chinese Patent Application CN117921263A discloses a welding equipment, including: a mounting bracket; a welding device provided with a working head for welding a target part to a target product; a first material taking device movably arranged on the mounting bracket and provided with a first material taking end, and the first material taking device takes the target part through the first material taking end; a first camera device arranged on one side of the welding device for identifying the target part and the external shape features of the target part; and a driving device arranged on the mounting bracket and drivingly connected to the welding device and the first camera device to make the working head opposite to the first material taking end or the first camera device opposite to the first material taking end, which improves the production efficiency of the welding equipment;

[0005] Chinese Patent Application CN116851862A discloses a circuit board welding device and its production process, including a base. Above the base is provided an electric slide rail, and an electric slider is movably connected to the outside of the electric slide rail. Above the electric slider is fixedly installed a placement plate, and above the placement plate is fixedly installed a fixed block. On one side of the fixed block is provided an electric push rod, and at one end of the electric push rod is fixedly installed a push plate. Through the settings of the placement plate, fixed block, electric push rod, push plate and sponge pad, when welding the circuit board, it is necessary to perform limit fixation to avoid deviation during welding, resulting in welding misalignment. Two groups of electric push rods are used to push the push plate to clamp the circuit board. Through the settings of the two groups of push plates, circuit boards of different sizes can be clamped, and the circuit board will not be offset, and the qualified product rate is high. The setting of the sponge pad can effectively protect the side of the circuit board from being worn.

[0006] The above patent and the prior art also have the following defects:

[0007] During the welding process, it is necessary to transfer the electrical component to the circuit board, and release the fixation of the electrical component after it is transferred to the circuit board. The operation is more troublesome, and the electrical component is prone to displacement on the circuit board, resulting in welding misalignment. Bubbles are easily generated inside the solder after melting. The molten solder at high temperature is exposed to the air and is easily over-oxidized, resulting in a reduction in welding quality. Moreover, harmful gases are easily generated during the melting process of the solder, which is harmful to human health.

[0008] Therefore, the present application provides a welding device and a welding method for the production of semiconductor heating plates to meet the requirements. Summary of the Invention

[0009] The purpose of the present application is to provide a welding device and a welding method for the production of semiconductor heating plates. The electrical component is adsorbed through the movable tube and the negative pressure tube to ensure the accurate position of the electrical component on the circuit board. When the electrical component is placed on the circuit board, the welding shell abuts against the circuit board, the negative pressure disappears and is pressed by the compression spring to ensure that the electrical component is tightly attached to the circuit board, improving the welding effect. At the same time, the movable tube is connected to the welding shell, and the inside of the welding shell is pumped to a vacuum through negative pressure, so that the electrical component is welded to the circuit board in a vacuum environment, helping to discharge the internal bubbles after the solder melts, making the welding more firm, improving the electrical performance after welding, reducing the degree of oxidation during welding, improving the welding quality. At the same time, the harmful gases generated during the welding process are sucked away through the movable tube, reducing air pollution and protecting human safety.

[0010] To achieve the above object, the present application provides the following technical solution: A welding device, including a welding box, a horizontal moving component is arranged in the welding box, a vertical moving component is arranged on the horizontal moving component, a welding component is arranged on the vertical moving component, the vertical moving component can drive the welding component to move vertically, and the horizontal moving component can drive the vertical moving component and the welding component to move horizontally;

[0011] The welding component includes a welding shell, a negative pressure unit and a heating unit. The negative pressure unit and the heating unit are arranged in the welding shell. The negative pressure unit includes a negative pressure pipe, a movable pipe and a compression spring. The movable pipe is sleeved on the negative pressure pipe. The compression spring is arranged between the negative pressure shell and the movable pipe. An activity hole is opened on the movable pipe, and a negative pressure hole is opened on the negative pressure pipe. The activity hole and the negative pressure hole are arranged in a staggered manner. When the movable pipe moves downward relative to the negative pressure pipe, the movable pipe rotates to connect the activity hole and the negative pressure hole, and at the same time the compression spring stores energy;

[0012] Negative pressure can be generated in the movable pipe. When the activity hole is connected to the negative pressure hole, the movable pipe is connected to the welding shell, and the inside of the welding shell is pumped to negative pressure.

[0013] Preferably, the welding component further includes a rotating unit. After the movable pipe moves downward relative to the negative pressure pipe by a certain distance, the rotating unit rotates the movable pipe to overlap and connect the activity hole and the negative pressure hole. After the movable pipe moves upward relative to the negative pressure pipe by a certain distance, the rotating unit rotates the movable pipe to stagger the activity hole and the negative pressure hole.

[0014] Preferably, the welding component further includes a negative pressure shell. The negative pressure pipe is fixedly installed on the top of the negative pressure shell and is communicated with the negative pressure shell. A plurality of adsorption holes are opened at the bottom of the negative pressure shell, and a sealing ring is fixedly installed at the position of the negative pressure shell corresponding to the adsorption holes;

[0015] The rotating unit includes a connecting cylinder, a rotating plate, a guiding groove and a rotating rod. The connecting cylinder is fixedly installed on the top of the negative pressure shell. The connecting cylinder is sleeved on the movable pipe. The rotating plate is fixedly installed on the movable pipe. One end of the compression spring is fixedly installed on the movable pipe, and the other end of the compression spring is fixedly installed with a connecting plate. The connecting plate is rotatably connected to the negative pressure shell. The rotating rod is rotatably connected to the rotating plate, and the rotating rod is slidably matched in the guiding groove.

[0016] Preferably, the guiding groove includes a staggered groove, an overlapping groove, a staggered switching groove and an overlapping switching groove. The staggered groove, the staggered switching groove, the overlapping groove and the overlapping switching groove are connected end to end. The staggered switching groove is located above the overlapping switching groove, and both the staggered switching groove and the overlapping switching groove are inclined.

[0017] Preferably, the heating unit includes a heating air pump, a heating inner cylinder, a plurality of heating wires, a heating ring pipe, and an air supply pipe. The heating air pump is fixedly installed on the heating inner cylinder, the heating inner cylinder is fixedly installed in the welding shell, the heating ring pipe is fixedly installed on the heating inner cylinder, the heating ring pipe is communicated with the heating inner cylinder, the heating wires are fixedly installed between the welding shell and the heating inner cylinder, the output end of the heating air pump is communicated with the heating ring pipe, one end of the air supply pipe is communicated with the input end of the heating air pump, the other end of the air supply pipe penetrates through the heating inner cylinder and the welding shell, and a one-way valve is arranged in the air supply pipe.

[0018] Preferably, the welding assembly further includes a fixed shell and a connecting spring. The fixed shell is sleeved on the welding shell. One end of the connecting spring is fixedly installed on the fixed shell, and the other end of the connecting spring is fixedly installed on the heating inner cylinder. A sliding cylinder is fixedly installed on the fixed shell, and a sliding rod is fixedly installed on the heating inner cylinder. The sliding rod is inserted into the sliding cylinder and is in sliding fit with the sliding cylinder. The connecting spring is sleeved on the sliding cylinder and the sliding rod.

[0019] Preferably, the welding assembly further includes a vacuum pump and a vacuum pipe. The vacuum pump is fixedly installed on the fixed shell, the vacuum pipe is fixedly installed on the vacuum pump. The top of the movable pipe penetrates through the fixed shell and is rotatably connected with the fixed shell. The movable pipe is rotatably connected with the vacuum pipe.

[0020] Preferably, the horizontal movement assembly includes a moving cross bar, a moving screw, a moving motor, and a moving block. The moving cross bar is fixedly installed in the welding box, the moving motor is fixedly installed in the welding box, the moving screw is fixedly installed on the output end of the moving motor, the moving block is threadedly connected to the moving screw, a moving groove is formed in the moving cross bar, the moving block is in sliding fit in the moving groove. The vertical movement assembly includes a vertical air pump, a fixed block, and a fixing plate. The fixed block is fixedly installed on the moving block, the vertical air pump is fixedly installed on the fixed block, the fixing plate is fixedly installed on the fixed shell, and the output end of the vertical air pump penetrates through the fixed block and is fixedly installed on the fixing plate.

[0021] Preferably, a welding transmission component and a feeding transmission component are arranged in the welding box. The welding transmission component includes a welding transmission belt, a welding transmission motor, and a welding transmission roller. The welding transmission motor is fixedly installed on the welding box. The welding transmission roller is rotatably connected in the welding box and is fixedly installed at the output end of the welding transmission motor. The welding transmission belt is sleeved on the welding transmission roller. The feeding transmission component includes a feeding transmission belt, a feeding transmission motor, and a feeding transmission roller. The feeding transmission motor is fixedly installed on the welding box. The feeding transmission roller is rotatably connected in the welding box and is fixedly installed at the output end of the feeding transmission motor. The feeding transmission belt is sleeved on the feeding transmission roller.

[0022] A welding method for manufacturing a semiconductor heating plate using the above-mentioned welding equipment includes the following steps:

[0023] Place the circuit board of the heating plate under the welding shell and apply solder paste on the pads of the circuit board.

[0024] Place the electrical component on the negative pressure tube. Negative pressure is generated inside the movable tube, and the movable tube adsorbs the electrical component through the negative pressure tube.

[0025] The vertical moving component drives the welding shell to move downward. The electrical component on the negative pressure tube contacts the circuit board. The welding shell and the movable tube continue to move downward. The negative pressure tube stops moving, and the compression spring stores energy to press the electrical component onto the circuit board through the negative pressure tube.

[0026] After the movable tube continues to move downward for a certain distance, the movable tube rotates, and the movable hole on the movable tube overlaps and communicates with the negative pressure hole. The movable tube is connected to the welding box, and the negative pressure inside the negative pressure tube disappears, no longer adsorbing the electrical component. The movable tube evacuates the inside of the welding box to a vacuum.

[0027] The heating unit heats the electrical component and the circuit board. The solder on the circuit board melts to weld the electrical component to the circuit board in a vacuum environment. The toxic gas generated during welding is evacuated through the movable tube.

[0028] In summary, the technical effects and advantages of the present invention are:

[0029] 1. In the present invention, the electrical component is adsorbed through the movable tube and the negative pressure tube to ensure the accurate position of the electrical component on the circuit board. After the electrical component is placed on the circuit board, the welding shell abuts against the circuit board, the negative pressure disappears and it is pressed by the compression spring to ensure that the electrical component is closely attached to the circuit board, improving the welding effect. At the same time, the movable tube is connected to the welding shell, and the inside of the welding shell is pumped to a vacuum through negative pressure, so that the electrical component is welded to the circuit board in a vacuum environment, helping the solder to melt and discharge the internal bubbles, making the welding more firm, improving the electrical performance after welding, reducing the oxidation degree of welding, improving the welding quality. At the same time, the harmful gases generated during the welding process are drawn away through the movable tube, reducing air pollution and protecting human safety.

[0030] 2. In the present invention, the welding transmission motor drives the welding transmission roller to rotate, the welding transmission roller drives the welding transmission belt to move, the welding transmission belt drives the circuit board to move, the feeding transmission motor drives the feeding transmission belt to move, the feeding transmission belt drives the electrical component to move, and the horizontal moving component can drive the welding component to move. The welding component moves to the position of the electrical component to adsorb the electrical component, and then drives the electrical component to move to the position of the circuit board and weld it on the circuit board, reducing the loading and unloading operations and improving the welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0032] Figure 1 One of the three-dimensional structure diagrams of the present invention;

[0033] Figure 2 The structural diagram of the welding box, horizontal moving component, vertical moving component and welding component of the present invention;

[0034] Figure 3 The structural diagram of the moving cross bar, moving motor and moving screw in the present invention;

[0035] Figure 4 For the present invention Figure 3 The enlarged view of part A in;

[0036] Figure 5 The structural diagram of the welding shell, fixed shell, vacuum pump and vacuum tube in the present invention;

[0037] Figure 6 The structural diagram of the heating inner cylinder and the heating wire in the present invention;

[0038] Figure 7Schematic diagram of the heating loop tube, heating air pump and air supply pipe in the present invention;

[0039] Figure 8 Schematic diagram of the connecting cylinder, compression spring and rotating rod in the present invention;

[0040] Figure 9 Schematic diagram of the negative pressure pipe, movable pipe, connecting cylinder and rotating rod in the present invention;

[0041] Figure 10 Schematic diagram of the connecting cylinder, dislocation groove, overlapping groove, dislocation switching groove and overlapping switching groove in the present invention.

[0042] In the figure: 1, welding box; 2, horizontal moving assembly; 21, moving cross bar; 22, moving screw; 23, moving motor; 24, moving block; 3, vertical moving assembly; 31, vertical air pump; 32, fixing plate; 4, welding assembly; 41, welding shell; 42, negative pressure unit; 421, negative pressure pipe; 422, movable pipe; 423, compression spring; 43, heating unit; 431, heating air pump; 432, heating inner cylinder; 433, heating wire; 434, heating loop tube; 435, air supply pipe; 44, rotating unit; 441, connecting cylinder; 4421, dislocation groove; 4422, overlapping groove; 4423, dislocation switching groove; 4424, overlapping switching groove; 443, rotating rod; 45, negative pressure shell; 46, fixing shell; 47, connecting spring; 48, vacuum pump; 49, vacuum tube; 5, welding transmission assembly; 51, welding transmission belt; 52, welding transmission motor; 6, feeding transmission assembly; 61, feeding transmission belt; 62, feeding transmission motor. Detailed implementation mode

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0044] Embodiment 1: Refer to Figures 1 - 10 A welding device as shown, including a welding box 1, a horizontal moving assembly 2 is arranged in the welding box 1, a vertical moving assembly 3 is arranged on the horizontal moving assembly 2, a welding assembly 4 is arranged on the vertical moving assembly 3, the vertical moving assembly 3 can drive the welding assembly 4 to move vertically, and the horizontal moving assembly 2 can drive the vertical moving assembly 3 and the welding assembly 4 to move horizontally;

[0045] The welding assembly 4 includes a welding shell 41, a negative pressure unit 42, and a heating unit 43. The negative pressure unit 42 and the heating unit 43 are arranged inside the welding shell 41. The negative pressure unit 42 includes a negative pressure pipe 421, a movable pipe 422, and a compression spring 423. The movable pipe 422 is sleeved on the negative pressure pipe 421. The compression spring 423 is arranged between the negative pressure shell 45 and the movable pipe 422. An activity hole is formed in the movable pipe 422, and a negative pressure hole is formed in the negative pressure pipe 421. The activity hole and the negative pressure hole are arranged in a staggered manner. When the movable pipe 422 moves downward relative to the negative pressure pipe 421, the movable pipe 422 rotates to connect the activity hole and the negative pressure hole, and at the same time, the compression spring 423 stores energy;

[0046] Negative pressure can be generated inside the movable pipe 422. When the activity hole is connected to the negative pressure hole, the movable pipe 422 is connected to the welding shell 41, and the inside of the welding shell 41 is pumped to negative pressure.

[0047] Place the circuit board below the welding shell 41, apply solder paste on the pads of the circuit board, place the electrical component on the negative pressure pipe 421. Negative pressure is generated inside the movable pipe 422, and the movable pipe 422 adsorbs the electrical component through the negative pressure pipe 421. The vertical movement assembly 3 drives the welding shell 41 to move downward. The electrical component on the negative pressure pipe 421 contacts the circuit board. The welding shell 41 and the movable pipe 422 continue to move downward. The negative pressure pipe 421 stops moving, and the compression spring 423 stores energy to press the electrical component tightly on the circuit board through the negative pressure pipe 421. After the movable pipe 422 continues to move downward for a certain distance, the movable pipe 422 rotates, and the activity hole on the movable pipe 422 overlaps and communicates with the negative pressure hole. The movable pipe 422 is connected to the welding box 1, and the negative pressure inside the negative pressure pipe 421 disappears, and the electrical component is no longer adsorbed. The movable pipe 422 pumps the inside of the welding box 1 to vacuum. The heating unit 43 heats the electrical component and the circuit board, and the solder on the circuit board melts to weld the electrical component on the circuit board in a vacuum environment. The toxic gas generated by welding is taken away through the movable pipe 422.

[0048] The electrical component is adsorbed through the movable pipe 422 and the negative pressure pipe 421 to ensure that the position of the electrical component placed on the circuit board is accurate. After the electrical component is placed on the circuit board, the welding shell 41 abuts against the circuit board, the negative pressure disappears and is pressed through the compression spring 423 to ensure that the electrical component is tightly attached to the circuit board, improving the welding effect. At the same time, the movable pipe 422 is connected to the welding shell 41, and the inside of the welding shell 41 is pumped to vacuum through negative pressure, so that the electrical component is welded on the circuit board in a vacuum environment, helping the solder to discharge internal bubbles after melting, making the welding more firm, improving the electrical performance after welding, reducing the oxidation degree of welding, improving the welding quality. At the same time, the harmful gas generated during the welding process is taken away through the movable pipe 422, reducing air pollution and protecting human safety.

[0049] The size of the welding shell 41 is the same as that of the electrical component, so that the electrical component is not easy to shake inside the welding shell 41 and the position moved to the circuit board is more accurate.

[0050] This application is applicable to electrical components of relatively large sizes, preventing the electrical components on the circuit board from being too dense and the remaining electrical components on the circuit board from interfering with the contact between the welding shell 41 and the circuit board.

[0051] Example 2, referring to Figures 1 - 10 , which is different from the above embodiment in that the welding assembly 4 further includes a rotating unit 44. After the movable tube 422 moves downward relative to the negative pressure tube 421 by a certain distance, the rotating unit 44 rotates the movable tube 422 to overlap and communicate the movable hole and the negative pressure hole. After the movable tube 422 moves upward relative to the negative pressure tube 421 by a certain distance, the rotating unit 44 rotates the movable tube 422 to misalign the movable hole and the negative pressure hole.

[0052] After welding is completed, after the movable tube 422 moves upward relative to the negative pressure tube 421 by a certain distance, the movable tube 422 is rotated to misalign the movable hole and the negative pressure hole, so that when the movable tube 422 moves upward, the communication with the welding shell 41 is maintained, preventing the movable tube 422 from communicating with the negative pressure tube 421 to continue adsorbing the electrical component and leaving the electrical component on the circuit board.

[0053] Example 3, referring to Figures 1 - 10 , which is different from the above embodiment in that the welding assembly 4 further includes a negative pressure shell 45. The negative pressure tube 421 is fixedly installed on the top of the negative pressure shell 45 and communicates with the negative pressure shell 45. A plurality of adsorption holes are opened at the bottom of the negative pressure shell 45, and a sealing ring is fixedly installed at the position of the negative pressure shell 45 corresponding to the adsorption holes;

[0054] The rotating unit 44 includes a connecting cylinder 441, a rotating plate, a guiding groove, and a rotating rod 443. The connecting cylinder 441 is fixedly installed on the top of the negative pressure shell 45. The connecting cylinder 441 is sleeved on the movable tube 422. The rotating plate is fixedly installed on the movable tube 422. One end of the pressing spring 423 is fixedly installed on the movable tube 422, and the other end of the pressing spring 423 is fixedly installed with a connecting plate. The connecting plate is rotatably connected to the negative pressure shell 45. The rotating rod 443 is rotatably connected to the rotating plate, and the rotating rod 443 is slidably fitted in the guiding groove.

[0055] The negative pressure tube 421 adsorbs the electrical component through the negative pressure shell 45.

[0056] Example 4, referring to Figures 1 - 10 , which is different from the above embodiment in that the guiding groove includes a misalignment groove 4421, an overlapping groove 4422, a misalignment switching groove 4423, and an overlapping switching groove 4424. The misalignment groove 4421, the misalignment switching groove 4423, the overlapping groove 4422, and the overlapping switching groove 4424 are connected end to end. The misalignment switching groove 4423 is located above the overlapping switching groove 4424, and both the misalignment switching groove 4423 and the overlapping switching groove 4424 are inclined.

[0057] When welding is required, the vertical moving component 3 drives the welding shell 41, the movable tube 422 and the negative pressure tube 421 to move downward. The welding shell 41 abuts against the circuit board, the negative pressure tube 421 drives the electrical component to abut against the circuit board, and the movable tube 422 continues to move downward to drive the rotating rod 443 to move. The rotating rod 443 moves in the dislocation groove. At this time, the movable tube 422 does not rotate. Then the rotating rod 443 continues to move into the overlapping switching groove 4424 and circumferentially moves into the overlapping groove 4422 under the inclination of the overlapping switching groove 4424. The rotating rod 443 drives the rotating plate to rotate, and the rotating plate drives the movable tube 422 to rotate, so that the movable hole communicates with the negative pressure hole, the negative pressure in the negative pressure tube 421 disappears, the movable tube 422 communicates with the welding shell 41, and the inside of the welding shell 41 is pumped to a vacuum.

[0058] After welding is completed, the vertical moving component 3 drives the movable tube 422 to move upward to drive the rotating rod 443 to move. The rotating rod 443 moves upward in the overlapping groove 4422. At this time, the movable tube 422 does not rotate, and the movable hole and the negative pressure hole remain overlapped and communicated, so that the electrical component will not be adsorbed. The rotating rod 443 moves upward in the overlapping groove 4422 into the dislocation switching groove 4423 and rotates into the dislocation groove 4421 under the inclination of the dislocation switching groove 4423. The movable hole and the negative pressure hole are misaligned, and the movable tube 422 and the negative pressure tube 421 are restored to communicate.

[0059] Embodiment 5, refer to Figures 1 - 10 , which is different from the above embodiment in that the heating unit 43 includes a heating air pump 431, a heating inner cylinder 432, a plurality of heating wires 433, a heating ring pipe 434 and a gas supply pipe 435. The heating air pump 431 is fixedly installed on the heating inner cylinder 432, the heating inner cylinder 432 is fixedly installed in the welding shell 41, the heating ring pipe 434 is fixedly installed on the heating inner cylinder 432, the heating ring pipe 434 communicates with the heating inner cylinder 432, the heating wires 433 are fixedly installed between the welding shell 41 and the heating inner cylinder 432, the output end of the heating air pump 431 communicates with the heating ring pipe 434, one end of the gas supply pipe 435 communicates with the input end of the heating air pump 431, the other end of the gas supply pipe 435 penetrates through the heating inner cylinder 432 and the welding shell 41, and a one-way valve is arranged in the gas supply pipe 435.

[0060] The heating air pump 431 passes the outside air into the heating ring pipe 434, passes the air into the space between the heating inner cylinder 432 and the welding shell 41 through the heating ring pipe 434, the heating wires 433 heat the air, the heated air is discharged from the bottom of the heating inner cylinder 432, the discharged air heats the circuit board and the electrical component, the solder on the circuit board melts, and then the air is sucked away by the movable tube 422. After welding is completed, the heating air pump 431 stops, and the welding cools and solidifies to weld the electrical component on the circuit board.

[0061] Embodiment 6, refer to Figures 1 - 10, different from the above embodiments, the welding assembly 4 further includes a fixing shell 46 and a connecting spring 47. The fixing shell 46 is sleeved on the welding shell 41. One end of the connecting spring 47 is fixedly installed on the fixing shell 46, and the other end of the connecting spring 47 is fixedly installed on the heating inner cylinder 432. A sliding cylinder is fixedly installed on the fixing shell 46, and a sliding rod is fixedly installed on the heating inner cylinder 432. The sliding rod is inserted into the sliding cylinder and is in sliding fit with the sliding cylinder. The connecting spring 47 is sleeved on the sliding cylinder and the sliding rod.

[0062] The vertical moving assembly 3 drives the fixing shell 46 to move downward, and the fixing shell 46 presses the welding shell 41 against the circuit board through the connecting spring 47.

[0063] Embodiment 7, referring to Figures 1 - 10 , different from the above embodiments, the welding assembly 4 further includes a vacuum pump 48 and a vacuum tube 49. The vacuum pump 48 is fixedly installed on the fixing shell 46, the vacuum tube 49 is fixedly installed on the vacuum pump 48, the top of the movable tube 422 penetrates through the fixing shell 46 and is rotatably connected to the fixing shell 46, and the movable tube 422 is rotatably connected to the vacuum tube 49.

[0064] The vacuum pump 48 pumps the inside of the movable tube 422 to negative pressure through the vacuum tube 49, and the movable tube 422 rotates on the vacuum tube 49 without driving the vacuum tube 49 to rotate.

[0065] Embodiment 8, referring to Figures 1 - 10 , different from the above embodiments, the horizontal moving assembly 2 includes a moving cross bar 21, a moving screw 22, a moving motor 23 and a moving block 24. The moving cross bar 21 is fixedly installed in the welding box 1, the moving motor 23 is fixedly installed in the welding box 1, the moving screw 22 is fixedly installed at the output end of the moving motor 23, the moving block 24 is threadedly connected to the moving screw 22, a moving groove is formed in the moving cross bar 21, and the moving block 24 is slidably fitted in the moving groove. The vertical moving assembly 3 includes a vertical air pump 31, a fixing block and a fixing plate 32. The fixing block is fixedly installed on the moving block 24, the vertical air pump 31 is fixedly installed on the fixing block, the fixing plate 32 is fixedly installed on the fixing shell 46, and the output end of the vertical air pump 31 penetrates through the fixing block and is fixedly installed on the fixing plate 32.

[0066] The moving motor 23 drives the moving screw 22 to rotate, the moving block 24 moves on the moving screw 22, the moving block 24 drives the fixing block to move, the fixing block drives the fixing plate 32 to move, and the fixing plate 32 drives the fixing shell 46 to move.

[0067] Embodiment 9, referring to Figures 1 - 10, different from the above embodiments, a welding transmission assembly 5 and a feeding transmission assembly 6 are provided in the welding box 1. The welding transmission assembly 5 includes a welding transmission belt 51, a welding transmission motor 52 and welding transmission rollers. The welding transmission motor 52 is fixedly installed on the welding box 1. The welding transmission rollers are rotatably connected in the welding box 1 and are fixedly installed at the output end of the welding transmission motor 52. The welding transmission belt 51 is sleeved on the welding transmission rollers. The feeding transmission assembly 6 includes a feeding transmission belt 61, a feeding transmission motor 62 and feeding transmission rollers. The feeding transmission motor 62 is fixedly installed on the welding box 1. The feeding transmission rollers are rotatably connected in the welding box 1 and are fixedly installed at the output end of the feeding transmission motor 62. The feeding transmission belt 61 is sleeved on the feeding transmission rollers.

[0068] The welding transmission motor 52 drives the welding transmission rollers to rotate. The welding transmission rollers drive the welding transmission belt 51 to move. The welding transmission belt 51 drives the circuit board to move. The feeding transmission motor 62 drives the feeding transmission belt 61 to move. The feeding transmission belt 61 drives the electrical components to move. The horizontal moving assembly 2 can drive the welding assembly 4 to move. The welding assembly 4 moves to the position of the electrical components to adsorb the electrical components, and then drives the electrical components to move to the position of the circuit board and welds them on the circuit board, reducing the loading and unloading operations and improving the welding efficiency.

[0069] A welding method for manufacturing a semiconductor heating plate, using the above welding equipment, includes the following steps:

[0070] Place the circuit board of the heating plate under the welding shell 41 and apply solder paste on the solder pads of the circuit board.

[0071] Place the electrical components on the negative pressure tube 421. Negative pressure is generated in the movable tube 422, and the movable tube 422 adsorbs the electrical components through the negative pressure tube 421.

[0072] The vertical moving assembly 3 drives the welding shell 41 to move downward. The electrical components on the negative pressure tube 421 come into contact with the circuit board. The welding shell 41 and the movable tube 422 continue to move downward. The negative pressure tube 421 stops moving, and the compression spring 423 stores energy to press the electrical components tightly on the circuit board through the negative pressure tube 421.

[0073] After the movable tube 422 continues to move downward for a certain distance, the movable tube 422 rotates, and the movable holes on the movable tube 422 overlap and communicate with the negative pressure holes. The movable tube 422 is connected to the welding box 1, and the negative pressure in the negative pressure tube 421 disappears, no longer adsorbing the electrical components. The movable tube 422 evacuates the inside of the welding box 1 to a vacuum.

[0074] The heating unit 43 heats the electrical components and the circuit board. The solder on the circuit board melts to weld the electrical components on the circuit board in a vacuum environment. The toxic gases generated during welding are drawn away through the movable tube 422.

[0075] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A welding device, comprising a welding box, wherein a horizontal moving component is arranged inside the welding box, a vertical moving component is arranged on the horizontal moving component, a welding component is arranged on the vertical moving component, the vertical moving component can drive the welding component to move vertically, and the horizontal moving component can drive the vertical moving component and the welding component to move horizontally; The welding component includes a welding shell, a negative pressure unit and a heating unit. The negative pressure unit and the heating unit are arranged inside the welding shell. The negative pressure unit includes a negative pressure pipe, a movable pipe and a compression spring. The movable pipe is sleeved on the negative pressure pipe. The welding component further includes a negative pressure shell. The negative pressure pipe is fixedly installed on the top of the negative pressure shell and communicated with the negative pressure shell. A plurality of adsorption holes are formed at the bottom of the negative pressure shell. A sealing ring is fixedly installed at the position of the negative pressure shell corresponding to the adsorption holes. The compression spring is arranged between the negative pressure shell and the movable pipe. An activity hole is formed in the movable pipe, and a negative pressure hole is formed in the negative pressure pipe. The activity hole and the negative pressure hole are arranged in a staggered manner. When the movable pipe moves downward relative to the negative pressure pipe, the movable pipe rotates to communicate the activity hole and the negative pressure hole, and at the same time the compression spring stores energy; Negative pressure can be generated inside the movable pipe. When the activity hole is communicated with the negative pressure hole, the movable pipe is communicated with the welding shell, and the inside of the welding shell is pumped to negative pressure.

2. The welding device according to claim 1, wherein: The welding component further includes a rotating unit. After the movable pipe moves downward relative to the negative pressure pipe by a certain distance, the rotating unit rotates the movable pipe to overlap and communicate the activity hole and the negative pressure hole. After the movable pipe moves upward relative to the negative pressure pipe by a certain distance, the rotating unit rotates the movable pipe to stagger the activity hole and the negative pressure hole.

3. A welding device according to claim 2, characterized in that: The rotating unit includes a connecting cylinder, a rotating plate, a guiding groove and a rotating rod. The connecting cylinder is fixedly installed on the top of the negative pressure shell. The connecting cylinder is sleeved on the movable pipe. The rotating plate is fixedly installed on the movable pipe. One end of the compression spring is fixedly installed on the movable pipe, and the other end of the compression spring is fixedly installed with a connecting plate. The connecting plate is rotatably connected to the negative pressure shell. The rotating rod is rotatably connected to the rotating plate. The rotating rod is slidably matched in the guiding groove.

4. A welding device according to claim 3, characterized in that: The guiding groove includes a staggering groove, an overlapping groove, a staggering switching groove and an overlapping switching groove. The staggering groove, the staggering switching groove, the overlapping groove and the overlapping switching groove are connected end to end. The staggering switching groove is located above the overlapping switching groove. The staggering switching groove and the overlapping switching groove are both inclined.

5. A welding device according to claim 1, characterized in that: The heating unit includes a heating air pump, a heating inner cylinder, a plurality of heating wires, a heating ring pipe and a supply air pipe. The heating air pump is fixedly installed on the heating inner cylinder. The heating inner cylinder is fixedly installed in the welding shell. The heating ring pipe is fixedly installed on the heating inner cylinder. The heating ring pipe communicates with the heating inner cylinder. The heating wires are fixedly installed between the welding shell and the heating inner cylinder. The output end of the heating air pump communicates with the heating ring pipe. One end of the supply air pipe communicates with the input end of the heating air pump. The other end of the supply air pipe penetrates through the heating inner cylinder and the welding shell. A one-way valve is arranged in the supply air pipe.

6. The welding device according to claim 5, characterized in that: The welding assembly further includes a fixed shell and a connecting spring. The fixed shell is sleeved on the welding shell. One end of the connecting spring is fixedly installed on the fixed shell. The other end of the connecting spring is fixedly installed on the heating inner cylinder. A sliding cylinder is fixedly installed on the fixed shell. A sliding rod is fixedly installed on the heating inner cylinder. The sliding rod is inserted into the sliding cylinder and is in sliding fit with the sliding cylinder. The connecting spring is sleeved on the sliding cylinder and the sliding rod.

7. A welding device according to claim 6, characterized in that: The welding assembly further includes a vacuum pump and a vacuum pipe. The vacuum pump is fixedly installed on the fixed shell. The vacuum pipe is fixedly installed on the vacuum pump. The top of the movable pipe penetrates through the fixed shell and is rotatably connected with the fixed shell. The movable pipe is rotatably connected with the vacuum pipe.

8. A welding device according to claim 6, characterized in that: The horizontal movement assembly includes a moving cross bar, a moving screw rod, a moving motor and a moving block. The moving cross bar is fixedly installed in the welding box. The moving motor is fixedly installed in the welding box. The moving screw rod is fixedly installed at the output end of the moving motor. The moving block is threadedly connected to the moving screw rod. A moving groove is formed in the moving cross bar. The moving block is in sliding fit in the moving groove. The vertical movement assembly includes a vertical air pump, a fixed block and a fixed plate. The fixed block is fixedly installed on the moving block. The vertical air pump is fixedly installed on the fixed block. The fixed plate is fixedly installed on the fixed shell. The output end of the vertical air pump penetrates through the fixed block and is fixedly installed on the fixed plate.

9. A welding device according to claim 1, characterized in that: A welding transmission assembly and a feeding transmission assembly are arranged in the welding box. The welding transmission assembly includes a welding transmission belt, a welding transmission motor and a welding transmission roller. The welding transmission motor is fixedly installed on the welding box. The welding transmission roller is rotatably connected in the welding box. The welding transmission roller is fixedly installed at the output end of the welding transmission motor. The welding transmission belt is sleeved on the welding transmission roller. The feeding transmission assembly includes a feeding transmission belt, a feeding transmission motor and a feeding transmission roller. The feeding transmission motor is fixedly installed on the welding box. The feeding transmission roller is rotatably connected in the welding box. The feeding transmission roller is fixedly installed at the output end of the feeding transmission motor. The feeding transmission belt is sleeved on the feeding transmission roller.

10. A welding method for manufacturing a semiconductor heating plate, which uses the welding equipment described in any one of claims 1-9, characterized in that: Including the following steps: Place the circuit board of the heating plate under the welding shell and apply solder paste on the pads of the circuit board. Place the electrical component on the negative pressure pipe. Negative pressure is generated in the movable pipe, and the movable pipe adsorbs the electrical component through the negative pressure pipe. The vertical moving component drives the welding shell to move downward. The electrical components on the negative pressure pipe come into contact with the circuit board. The welding shell and the movable pipe continue to move downward. The negative pressure pipe stops moving, and the compression spring stores energy to press the electrical components onto the circuit board through the negative pressure pipe. After the movable pipe continues to move downward for a certain distance, the movable pipe rotates, and the movable hole on the movable pipe overlaps and communicates with the negative pressure hole. The movable pipe is connected to the welding box, and the negative pressure in the negative pressure pipe disappears, no longer adsorbing the electrical components. The movable pipe evacuates the inside of the welding box to a vacuum. The heating unit heats the electrical components and the circuit board. The solder on the circuit board melts to weld the electrical components onto the circuit board in a vacuum environment. The toxic gases generated by the welding are drawn away through the movable pipe.

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