Welding equipment and welding method for semiconductor heating plate production

Abstract

The invention discloses welding equipment and a welding method for semiconductor heating plate production, and relates to the field of welding equipment.The welding equipment comprises a welding box, a horizontal moving assembly is arranged in the welding box, a vertical moving assembly is arranged on the horizontal moving assembly, and a welding assembly is arranged on the vertical moving assembly; the vertical moving assembly can drive the welding assembly to vertically move, the horizontal moving assembly can drive the vertical moving assembly and the welding assembly to horizontally move, the welding assembly comprises 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. The electric appliance elements are tightly attached to the circuit board, the welding effect is improved, the electric parts are welded to the circuit board in a vacuum environment, internal bubbles are discharged after soldering tin is melted, welding is firmer, the electrical performance after welding is improved, the oxidation degree of welding is reduced, the welding quality is improved, meanwhile, harmful gas generated in the welding process is pumped away through the movable pipe, and the welding quality is improved. Air pollution is reduced, and human body safety is protected.

Description

Technical Field

[0001] The invention relates to the field of welding equipment, in particular to welding equipment and a welding method for producing semiconductor heating discs. Background Art

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

[0003] A heating plate is a device that converts electrical energy into thermal energy. It is usually composed of heating elements, shell materials, control elements, connecting wires and plugs. The basic principle is to convert electrical energy into thermal energy through heating elements (such as resistance wires, heating tubes, electric heating films, etc.), and then transfer the heat to the object to be heated through heat conduction. The control circuit board of the heating plate in the production process needs to be processed using welding equipment.

[0004] Chinese patent application CN117921263A discloses a welding device, comprising: a mounting bracket; a welding device, provided with a working head, the working head is used to weld a target part to a target product; a first material picking device, movably arranged on the mounting bracket, provided with a first material picking end, the first material picking device removes the target part through the first material picking end; a first camera device, arranged on one side of the welding device, used to identify the target part and the appearance characteristics of the target part; and a driving device, arranged on the mounting bracket and drivingly connecting the welding device and the first camera device, so that the working head is opposite to the first material picking end or the first camera device is opposite to the first material picking end, thereby improving the production efficiency of the welding device; Chinese patent application CN116851862A discloses a circuit board welding equipment and its production process, including a base, an electric slide rail is arranged on the top of the base, an electric slider is movably connected to the outside of the electric slide rail, a placement plate is fixedly installed on the top of the electric slider, a fixed block is fixedly installed on the top of the placement plate, an electric push rod is arranged on one side of the fixed block, and a push plate is fixedly installed on one end of the electric push rod, through the arrangement of the placement plate, the fixed block, the electric push rod, the push plate and the sponge pad, when the circuit board is welded, it is necessary to limit and fix it to avoid offset during the welding process, resulting in welding misalignment, and two groups of electric push rods are used to push the push plate to clamp the circuit board, and the two groups of push plates can meet the needs of clamping circuit boards of different sizes without causing the circuit board to deviate, and the qualified finished product rate is high, and the arrangement of the sponge pad can effectively protect the side of the circuit board from wear.

[0005] The above patents and prior art also have the following defects: During the welding process, the electrical components need to be transferred to the circuit board, and then the fixation of the electrical components needs to be loosened, which makes the operation more troublesome. The electrical components are easily displaced on the circuit board, resulting in welding misalignment. Bubbles are easily generated inside the solder after it melts. The solder melts at high temperature and is exposed to the air, which is easily over-oxidized, resulting in reduced welding quality. In addition, harmful gases are easily generated during the melting of the solder, which endangers human health.

[0006] Therefore, the present application provides a welding device and a welding method for producing semiconductor heating plates to meet the needs. Summary of the invention

[0007] 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 components are adsorbed by a movable tube and a negative pressure tube to ensure that the electrical components are accurately placed on the circuit board. When the electrical components are placed on the circuit board, the welding shell and the circuit board are abutted, the negative pressure disappears and is compressed by a compression spring to ensure that the electrical components are tightly attached to the circuit board, thereby 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 evacuated to a vacuum through negative pressure, so that the electrical components are welded on the circuit board in a vacuum environment, which helps to discharge internal bubbles after the solder melts, making the welding more firm, improving the electrical performance after welding, reducing the degree of oxidation of the welding, and improving the welding quality. At the same time, the harmful gases generated during the welding process are extracted through the movable tube to reduce air pollution and protect human safety.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a welding device, comprising a welding box, wherein a horizontal moving assembly is arranged in the welding box, a vertical moving assembly is arranged on the horizontal moving assembly, a welding assembly is arranged on the vertical moving assembly, the vertical moving assembly can drive the welding assembly to move vertically, and the horizontal moving assembly can drive the vertical moving assembly and the welding assembly to move horizontally; The welding assembly comprises a welding shell, a negative pressure unit and a heating unit, wherein the negative pressure unit and the heating unit are arranged in the welding shell, the negative pressure unit comprises a negative pressure tube, a movable tube and a compression spring, the movable tube is sleeved on the negative pressure tube, the compression spring is arranged between the negative pressure tube and the movable tube, a movable hole is provided on the movable tube, a negative pressure hole is provided on the negative pressure tube, the movable hole and the negative pressure hole are staggered, when the movable tube moves downward relative to the negative pressure tube, the movable tube rotates to connect the movable hole and the negative pressure hole, and the compression spring accumulates force at the same time; Negative pressure can be generated in the movable tube. When the movable hole is connected with the negative pressure hole, the movable tube is connected with the welding shell to pump the inside of the welding shell to negative pressure.

[0009] Preferably, the welding assembly also includes a rotating unit, and when the movable tube moves downward a certain distance relative to the negative pressure tube, the rotating unit causes the movable tube to rotate, so that the movable hole and the negative pressure hole overlap and connect, and when the movable tube moves upward a certain distance relative to the negative pressure tube, the rotating unit causes the movable tube to rotate, so that the movable hole and the negative pressure hole are misaligned.

[0010] Preferably, the welding assembly further comprises a negative pressure shell, the negative pressure tube is fixedly mounted on the top of the negative pressure shell and 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 mounted on the negative pressure shell at the position of the adsorption holes; The rotating unit includes a connecting tube, a rotating plate, a guide groove and a rotating rod, the connecting tube is fixedly mounted on the top of the negative pressure shell, the connecting tube is sleeved on the movable tube, the rotating plate is fixedly mounted on the movable tube, one end of the compression spring is fixedly mounted on the movable tube, the other end of the compression spring is fixedly mounted 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 fitted in the guide groove.

[0011] Preferably, the guide groove includes an offset groove, an overlapping groove, an offset switching groove and an overlapping switching groove, and the offset groove, the offset switching groove, the overlapping groove and the overlapping switching groove are connected end to end, the offset switching groove is located above the overlapping switching groove, and the offset switching groove and the overlapping switching groove are both inclined.

[0012] Preferably, the heating unit includes a heating air pump, a heating inner cylinder, a plurality of electric heating wires, a heating ring tube and an air supply pipe, the heating air pump is fixedly mounted on the heating inner cylinder, the heating inner cylinder is fixedly mounted in the welding shell, the heating ring tube is fixedly mounted on the heating inner cylinder, the heating ring tube is communicated with the heating inner cylinder, the electric heating wire is fixedly mounted between the welding shell and the heating inner cylinder, the output end of the heating air pump is communicated with the heating ring tube, 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 passes through the heating inner cylinder and the welding shell, and a one-way valve is provided in the air supply pipe.

[0013] Preferably, the welding assembly also 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 mounted on the fixed shell, and the other end of the connecting spring is fixedly mounted on the heating inner cylinder, a sliding cylinder is fixedly mounted on the fixed shell, a sliding rod is fixedly mounted on the heating inner cylinder, the sliding rod is inserted in the sliding cylinder and slidably cooperates with the sliding cylinder, and the connecting spring is sleeved on the sliding cylinder and the sliding rod.

[0014] Preferably, the welding assembly also includes a vacuum pump and a vacuum tube, the vacuum pump is fixedly mounted on the fixed shell, the vacuum tube is fixedly mounted on the vacuum pump, the top of the movable tube passes through the fixed shell and is rotatably connected to the fixed shell, and the movable tube is rotatably connected to the vacuum tube.

[0015] Preferably, the horizontal moving component 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 at the output end of the moving motor, the moving block is threadedly connected to the moving screw, a moving groove is provided on the moving cross bar, and the moving block is slidably fitted in the moving groove, and the vertical moving component 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, and the output end of the vertical air pump passes through the fixed block and is fixedly installed on the fixed plate.

[0016] Preferably, a welding transmission component and a feeding transmission component are provided 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 mounted on the welding box, the welding transmission roller is rotatably connected in the welding box, the welding transmission roller is fixedly mounted on 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 mounted on the welding box, the feeding transmission roller is rotatably connected in the welding box, the feeding transmission roller is fixedly mounted on the output end of the feeding transmission motor, and the feeding transmission belt is sleeved on the feeding transmission roller.

[0017] A welding method for producing a semiconductor heating plate, using the above-mentioned welding equipment, comprises the following steps: Place the circuit board of the heating plate under the soldering shell and apply solder paste on the soldering pads of the circuit board; The electrical components are placed on the negative pressure tube, negative pressure is generated in the movable tube, and the movable tube absorbs the electrical components through the negative pressure tube; The vertical moving assembly drives the welding shell to move downward, the electrical components on the negative pressure tube come into contact with the circuit board, the welding shell and the movable tube continue to move downward, the negative pressure tube stops moving, and the compression spring accumulates force to press the electrical components onto the circuit board through the negative pressure tube; After the movable tube continues to move downward for a distance, the movable tube rotates, the movable hole on the movable tube overlaps and communicates with the negative pressure hole, the movable tube is connected to the welding box, the negative pressure in the negative pressure tube disappears, the electrical parts are no longer adsorbed, and the movable tube draws the welding box into vacuum; The heating unit heats the electrical components and the circuit board, the solder on the circuit board melts, and the electrical components are welded to the circuit board in a vacuum environment. The toxic gas generated by welding is extracted through the movable tube.

[0018] In summary, the technical effects and advantages of the present invention are as follows: 1. In the present invention, the electrical components are adsorbed by the movable tube and the negative pressure tube to ensure that the electrical components are accurately placed on the circuit board. When the electrical components are placed on the circuit board, the welding shell and the circuit board are against each other, the negative pressure disappears and is compressed by the compression spring to ensure that the electrical components are closely attached to the circuit board, thereby improving the welding effect. At the same time, the movable tube is connected to the welding shell, and the welding shell is evacuated to a vacuum by the negative pressure, so that the electrical components are welded on the circuit board in a vacuum environment, which helps to discharge the internal bubbles after the solder melts, making the welding more firm, improving the electrical performance after welding, reducing the oxidation degree of welding, and improving the welding quality. At the same time, the harmful gases generated during the welding process are evacuated through the movable tube to reduce air pollution and protect human safety. 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 parts to move, the horizontal moving assembly can drive the welding assembly to move, the welding assembly moves to the electrical part position to adsorb the electrical parts, and then drives the electrical parts to move to the circuit board position and weld them on the circuit board, thereby reducing loading and unloading operations and improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is one of the three-dimensional structural schematic diagrams of the present invention; Figure 2 It is a structural schematic diagram of the welding box, the horizontal moving assembly, the vertical moving assembly and the welding assembly of the present invention; Figure 3 It is a structural schematic diagram of the movable crossbar, movable motor and movable screw in the present invention; Figure 4 For the present invention Figure 3 A magnified view of part A; Figure 5 It is a schematic diagram of the structure of the welding shell, the fixed shell, the vacuum pump and the vacuum tube in the present invention; Figure 6 It is a schematic diagram of the structure of the heating inner cylinder and the heating wire in the present invention; Figure 7 It is a schematic diagram of the structure of the heating ring pipe, the heating air pump and the air supply pipe in the present invention; Figure 8 It is a schematic diagram of the structure of the connecting tube, the compression spring and the rotating rod in the present invention; Fig. 9 It is a schematic diagram of the structure of the negative pressure tube, the movable tube, the connecting tube and the rotating rod in the present invention; Fig.10 It is a schematic diagram of the structure of the connecting cylinder, the dislocation groove, the overlapping groove, the dislocation switching groove and the overlapping switching groove in the present invention.

[0021] In the figure: 1. welding box; 2. horizontal moving assembly; 21. moving crossbar; 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 ring pipe; 435. Air supply pipe; 44. Rotating unit; 441. Connecting tube; 4421. Offset groove; 4422. Overlap groove; 4423. Offset switching groove; 4424. Overlap switching groove; 443. Rotating rod; 45. Negative pressure shell; 46. Fixed 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 DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1: Reference Figure 1-Figure 10 A welding device shown includes 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; 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 in the welding shell 41. The negative pressure unit 42 includes a negative pressure tube 421, a movable tube 422 and a compression spring 423. The movable tube 422 is sleeved on the negative pressure tube 421. The compression spring 423 is arranged between the negative pressure tube 421 and the movable tube 422. A movable hole is opened on the movable tube 422, and a negative pressure hole is opened on the negative pressure tube 421. The movable hole and the negative pressure hole are staggered. When the movable tube 422 moves downward relative to the negative pressure tube 421, the movable tube 422 rotates to connect the movable hole and the negative pressure hole, and the compression spring 423 accumulates force at the same time. Negative pressure can be generated in the movable tube 422. When the movable hole is connected to the negative pressure hole, the movable tube 422 is connected to the welding shell 41, and the welding shell 41 is evacuated to negative pressure.

[0024] The circuit board is placed under the welding shell 41, solder paste is coated on the pad of the circuit board, and the electrical components are placed 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. The vertical moving component 3 drives the welding shell 41 to move downward, and the electrical components on the negative pressure tube 421 contact the circuit board. The welding shell 41 and the movable tube 422 continue to move downward, and the negative pressure tube 421 stops moving. The compression spring 423 accumulates force to press the electrical components on the circuit board through the negative pressure tube 421. After the movable tube 422 continues to move downward for a distance, the movable tube 422 rotates, and the movable hole on the movable tube 422 overlaps and communicates with the negative pressure hole. The movable tube 422 is connected to the welding box 1, and the negative pressure in the negative pressure tube 421 disappears, and the electrical components are no longer adsorbed. The movable tube 422 evacuates the welding box 1 to a vacuum, and the heating unit 43 heats the electrical components and the circuit board. The solder on the circuit board melts and the electrical components are welded to the circuit board under a vacuum environment. The toxic gas generated by welding is drawn away through the movable tube 422.

[0025] The electrical components are adsorbed by the movable tube 422 and the negative pressure tube 421 to ensure that the electrical components are accurately placed on the circuit board. When the electrical components are placed on the circuit board, the welding shell 41 is against the circuit board, the negative pressure disappears and is compressed by the compression spring 423 to ensure that the electrical components are tightly attached to the circuit board, thereby improving the welding effect. At the same time, the movable tube 422 is connected to the welding shell 41, and the welding shell 41 is evacuated to a vacuum through the negative pressure, so that the electrical components are welded on the circuit board in a vacuum environment, which helps to expel internal bubbles after the solder melts, making the welding more firm, improving the electrical performance after welding, reducing the degree of oxidation of the welding, and improving the welding quality. At the same time, the harmful gases generated during the welding process are evacuated through the movable tube 422 to reduce air pollution and protect human safety.

[0026] The size of the welding shell 41 is consistent with the size of the electrical component, so that the electrical component is not easy to shake in the welding shell 41 and can be moved to a position on the circuit board more accurately.

[0027] The present application is applicable to electrical components of larger sizes, so as to prevent 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.

[0028] Example 2, reference Figure 1-Figure 10 , which is different from the above-mentioned embodiment, the welding assembly 4 also includes a rotating unit 44. When the movable tube 422 moves downward for a distance relative to the negative pressure tube 421, the rotating unit 44 rotates the movable tube 422 to overlap and connect the movable hole and the negative pressure hole. When the movable tube 422 moves upward for a distance relative to the negative pressure tube 421, the rotating unit 44 rotates the movable tube 422 to misalign the movable hole and the negative pressure hole.

[0029] After welding is completed, the movable tube 422 moves upward for a distance relative to the negative pressure tube 421, and then 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, it maintains communication with the welding shell 41 to prevent the movable tube 422 from being connected to the negative pressure tube 421 to continue to adsorb electrical components, leaving the electrical components on the circuit board.

[0030] Example 3, reference Figure 1-Figure 10 , which is different from the above embodiment, the welding assembly 4 further includes a negative pressure shell 45, a negative pressure pipe 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 adsorption hole of the negative pressure shell 45; The rotating unit 44 includes a connecting tube 441, a rotating plate, a guide groove and a rotating rod 443. The connecting tube 441 is fixedly installed on the top of the negative pressure shell 45, and the connecting tube 441 is sleeved on the movable tube 422. The rotating plate is fixedly installed on the movable tube 422. One end of the compression spring 423 is fixedly installed on the movable tube 422, and the other end of the compression spring 423 is fixedly installed with a connecting plate. The connecting plate is rotatably connected to the negative pressure shell 45, and the rotating rod 443 is rotatably connected to the rotating plate. The rotating rod 443 slides in the guide groove.

[0031] The negative pressure tube 421 absorbs the electrical components through the negative pressure shell 45 .

[0032] Example 4, reference Figure 1-Figure 10 , which is different from the above-mentioned embodiment, is that the guide groove includes a misaligned groove 4421, an overlapping groove 4422, a misaligned switching groove 4423 and an overlapping switching groove 4424, and the misaligned groove 4421, the misaligned switching groove 4423, the overlapping groove 4422 and the overlapping switching groove 4424 are connected end to end, the misaligned switching groove 4423 is located above the overlapping switching groove 4424, and the misaligned switching groove 4423 and the overlapping switching groove 4424 are both inclined.

[0033] 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 is abutted against the circuit board, the negative pressure tube 421 drives the electrical components to abut against the circuit board, the movable tube 422 continues to move downward to drive the rotating rod 443 to move, the rotating rod 443 moves in the offset 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 moves circumferentially into the overlapping groove 4422 under the inclination of the overlapping switching groove 4424, the rotating rod 443 drives the rotating plate to rotate, the rotating plate drives the movable tube 422 to rotate, so that the movable hole is connected with the negative pressure hole, the negative pressure in the negative pressure tube 421 disappears, the movable tube 422 is connected with the welding shell 41, and the welding shell 41 is evacuated to a vacuum.

[0034] After welding is completed, the vertical moving component 3 drives the movable tube 422 to move upward and drives 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 overlapping and connected, and the electrical parts will not be adsorbed. The rotating rod 443 moves upward in the overlapping groove 4422 to the offset switching groove 4423, and rotates to the offset groove 4421 under the inclination of the offset switching groove 4423. The movable hole and the negative pressure hole are offset, and the movable tube 422 and the negative pressure tube 421 are restored to be connected.

[0035] Example 5, reference Figure 1-Figure 10 , which is different from the above-mentioned embodiment, the heating unit 43 includes a heating air pump 431, a heating inner cylinder 432, a plurality of electric heating wires 433, a heating ring tube 434 and an air supply pipe 435. The heating air pump 431 is fixedly mounted on the heating inner cylinder 432, the heating inner cylinder 432 is fixedly mounted in the welding shell 41, the heating ring tube 434 is fixedly mounted on the heating inner cylinder 432, the heating ring tube 434 is connected with the heating inner cylinder 432, the electric heating wires 433 are fixedly mounted between the welding shell 41 and the heating inner cylinder 432, the output end of the heating air pump 431 is connected with the heating ring tube 434, one end of the air supply pipe 435 is connected with the input end of the heating air pump 431, the other end of the air supply pipe 435 passes through the heating inner cylinder 432 and the welding shell 41, and a one-way valve is arranged in the air supply pipe 435.

[0036] The heating air pump 431 passes the outside air into the heating ring tube 434, and then passes the air into the space between the heating inner cylinder 432 and the welding shell 41 through the heating ring tube 434. The electric heating wire 433 heats the air, and the heated air is discharged from the bottom of the heating inner cylinder 432. The discharged air heats the circuit board and the electrical components, and the solder on the circuit board melts. Then the air is drawn away by the movable tube 422. After the welding is completed, the heating air pump 431 stops, and the welding cools and solidifies to weld the electrical components to the circuit board.

[0037] Example 6, reference Figure 1-Figure 10 , which is different from the above-mentioned embodiment, the welding assembly 4 also includes a fixed shell 46 and a connecting spring 47. The fixed shell 46 is sleeved on the welding shell 41, one end of the connecting spring 47 is fixedly installed on the fixed 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 fixed shell 46, and a sliding rod is fixedly installed on the heating inner cylinder 432. The sliding rod is inserted in the sliding cylinder and slidably cooperates with the sliding cylinder, and the connecting spring 47 is sleeved on the sliding cylinder and the sliding rod.

[0038] The vertical moving assembly 3 drives the fixed shell 46 to move downward, and the fixed shell 46 presses the welding shell 41 onto the circuit board through the connecting spring 47 .

[0039] Example 7, reference Figure 1-Figure 10, which is different from the above-mentioned embodiment, the welding assembly 4 also includes a vacuum pump 48 and a vacuum tube 49. The vacuum pump 48 is fixedly mounted on the fixed shell 46, and the vacuum tube 49 is fixedly mounted on the vacuum pump 48. The top of the movable tube 422 passes through the fixed shell 46 and is rotatably connected to the fixed shell 46, and the movable tube 422 is rotatably connected to the vacuum tube 49.

[0040] The vacuum pump 48 evacuates the inside of the movable tube 422 to a 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.

[0041] Example 8, reference Figure 1-Figure 10 , which is different from the above-mentioned embodiment, the horizontal moving component 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 provided on the moving cross bar 21, and the moving block 24 is slidably fitted in the moving groove, the vertical moving component 3 includes a vertical air pump 31, a fixed block and a fixed plate 32, the fixed block is fixedly installed on the moving block 24, the vertical air pump 31 is fixedly installed on the fixed block, the fixed plate 32 is fixedly installed on the fixed shell 46, and the output end of the vertical air pump 31 passes through the fixed block and is fixedly installed on the fixed plate 32.

[0042] 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 fixed block to move, the fixed block drives the fixed plate 32 to move, and the fixed plate 32 drives the fixed shell 46 to move.

[0043] Example 9, reference Figure 1-Figure 10 , which is different from the above-mentioned embodiment, a welding transmission component 5 and a feeding transmission component 6 are arranged in the welding box 1, the welding transmission component 5 includes a welding transmission belt 51, a welding transmission motor 52 and a welding transmission roller, the welding transmission motor 52 is fixedly installed on the welding box 1, the welding transmission roller is rotatably connected in the welding box 1, the welding transmission roller is fixedly installed at the output end of the welding transmission motor 52, the welding transmission belt 51 is sleeved on the welding transmission roller, the feeding transmission component 6 includes a feeding transmission belt 61, a feeding transmission motor 62 and a feeding transmission roller, the feeding transmission motor 62 is fixedly installed on the welding box 1, the feeding transmission roller is rotatably connected in the welding box 1, the feeding transmission roller is fixedly installed at the output end of the feeding transmission motor 62, and the feeding transmission belt 61 is sleeved on the feeding transmission roller.

[0044] The welding transmission motor 52 drives the welding transmission roller to rotate, the welding transmission roller drives 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 parts to move, the horizontal moving component 2 can drive the welding component 4 to move, the welding component 4 moves to the electrical part position to adsorb the electrical parts, and then drives the electrical parts to move to the circuit board position and weld them on the circuit board, reducing loading and unloading operations and improving welding efficiency.

[0045] A welding method for producing a semiconductor heating plate, using the above-mentioned welding equipment, comprises the following steps: Place the circuit board of the heating plate under the welding shell 41 and apply solder paste on the welding pad of the circuit board; The electrical components are placed on the negative pressure tube 421, negative pressure is generated in the movable tube 422, and the movable tube 422 absorbs the electrical components through the negative pressure tube 421; The vertical moving assembly 3 drives the welding shell 41 to move downward, the electrical components on the negative pressure tube 421 contact 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 pressing spring 423 accumulates force to press the electrical components onto the circuit board through the negative pressure tube 421; After the movable tube 422 continues to move downward for a distance, the movable tube 422 rotates, the movable hole on the movable tube 422 overlaps and communicates with the negative pressure hole, the movable tube 422 is connected to the welding box 1, the negative pressure in the negative pressure tube 421 disappears, the electrical parts are no longer adsorbed, and the movable tube 422 draws the welding box 1 into vacuum; The heating unit 43 heats the electrical components and the circuit board, and the solder on the circuit board melts to weld the electrical components to the circuit board in a vacuum environment. The toxic gas generated by welding is extracted through the movable tube 422 .

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding device, comprising a welding box, wherein a horizontal moving assembly is arranged in the welding box, a vertical moving assembly is arranged on the horizontal moving assembly, a welding assembly is arranged on the vertical moving assembly, the vertical moving assembly can drive the welding assembly to move vertically, and the horizontal moving assembly can drive the vertical moving assembly and the welding assembly to move horizontally; The welding assembly comprises a welding shell, a negative pressure unit and a heating unit, wherein the negative pressure unit and the heating unit are arranged in the welding shell, the negative pressure unit comprises a negative pressure tube, a movable tube and a compression spring, the movable tube is sleeved on the negative pressure tube, the compression spring is arranged between the negative pressure tube and the movable tube, a movable hole is provided on the movable tube, a negative pressure hole is provided on the negative pressure tube, the movable hole and the negative pressure hole are staggered, when the movable tube moves downward relative to the negative pressure tube, the movable tube rotates to connect the movable hole and the negative pressure hole, and the compression spring accumulates force at the same time; Negative pressure can be generated in the movable tube. When the movable hole is connected with the negative pressure hole, the movable tube is connected with the welding shell to pump the inside of the welding shell to negative pressure.

2. A welding device according to claim 1, characterized in that: The welding assembly also includes a rotating unit. When the movable tube moves downward a certain distance relative to the negative pressure tube, the rotating unit rotates the movable tube to overlap and connect the movable hole and the negative pressure hole. When the movable tube moves upward a certain distance relative to the negative pressure tube, the rotating unit rotates the movable tube to misalign the movable hole and the negative pressure hole.

3. A welding device according to claim 2, characterized in that: The welding assembly also includes a negative pressure shell, the negative pressure tube is fixedly installed on the top of the negative pressure shell and 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 on the position of the adsorption hole of the negative pressure shell; The rotating unit includes a connecting tube, a rotating plate, a guide groove and a rotating rod, the connecting tube is fixedly mounted on the top of the negative pressure shell, the connecting tube is sleeved on the movable tube, the rotating plate is fixedly mounted on the movable tube, one end of the compression spring is fixedly mounted on the movable tube, the other end of the compression spring is fixedly mounted 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 fitted in the guide groove.

4. A welding device according to claim 3, characterized in that: The guide groove includes a staggered groove, an overlapping groove, a staggered switching groove and an overlapping switching groove, wherein 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 the staggered 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 electric heating wires, a heating ring tube 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 tube is fixedly installed on the heating inner cylinder, the heating ring tube is communicated with the heating inner cylinder, the electric heating wire is 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 tube, 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 passes through the heating inner cylinder and the welding shell, and a one-way valve is arranged in the air supply pipe.

6. A welding device according to claim 5, characterized in that: The welding assembly also 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, a sliding rod is fixedly installed on the heating inner cylinder, the sliding rod is inserted in the sliding cylinder and slidably cooperates with the sliding cylinder, and 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 also includes a vacuum pump and a vacuum tube. The vacuum pump is fixedly mounted on the fixed shell. The vacuum tube is fixedly mounted on the vacuum pump. The top of the movable tube passes through the fixed shell and is rotatably connected to the fixed shell. The movable tube is rotatably connected to the vacuum tube.

8. A welding device according to claim 6, characterized in that: The horizontal moving 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 at the output end of the moving motor, the moving block is threadedly connected to the moving screw, a moving groove is provided on the moving cross bar, and the moving block is slidably fitted in the moving groove. The vertical moving 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, and the output end of the vertical air pump passes 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 component and a feeding transmission component are arranged in the welding box, and the welding transmission component comprises a welding transmission belt, a welding transmission motor and a welding transmission roller, the welding transmission motor is fixedly mounted on the welding box, the welding transmission roller is rotatably connected in the welding box, the welding transmission roller is fixedly mounted on the output end of the welding transmission motor, the welding transmission belt is sleeved on the welding transmission roller, and the feeding transmission component comprises a feeding transmission belt, a feeding transmission motor and a feeding transmission roller, the feeding transmission motor is fixedly mounted on the welding box, the feeding transmission roller is rotatably connected in the welding box, the feeding transmission roller is fixedly mounted on the output end of the feeding transmission motor, and the feeding transmission belt is sleeved on the feeding transmission roller.

10. A welding method for producing a semiconductor heating plate, using the welding device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Place the circuit board of the heating plate under the soldering shell and apply solder paste on the soldering pads of the circuit board; The electrical components are placed on the negative pressure tube, negative pressure is generated in the movable tube, and the movable tube absorbs the electrical components through the negative pressure tube; The vertical moving assembly drives the welding shell to move downward, the electrical components on the negative pressure tube come into contact with the circuit board, the welding shell and the movable tube continue to move downward, the negative pressure tube stops moving, and the compression spring accumulates force to press the electrical components onto the circuit board through the negative pressure tube; After the movable tube continues to move downward for a distance, the movable tube rotates, the movable hole on the movable tube overlaps and communicates with the negative pressure hole, the movable tube is connected to the welding box, the negative pressure in the negative pressure tube disappears, the electrical parts are no longer adsorbed, and the movable tube draws the welding box into vacuum; The heating unit heats the electrical components and the circuit board, the solder on the circuit board melts, and the electrical components are welded to the circuit board in a vacuum environment. The toxic gas generated by welding is extracted through the movable tube.

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