Printed circuit board baking device

Abstract

The utility model provides a printed circuit board baking device, which belongs to the technical field of printed circuit board baking, and comprises a baking box body, an operation table is arranged on the bottom wall of the inner side of the baking box body, an embedding groove is formed in the center of the top of the operation table, a rotary clamp is detachably arranged in the embedding groove, and the rotary clamp comprises a base and a rotary clamping frame. Supporting plates are arranged at the two ends of the top of the base, rotating frames are arranged on the two sides of the rotating clamping frame and rotationally connected with the supporting plates, a gear transmission structure is arranged on the rotating frame close to the left side, a transmission assembly is arranged on the left side in the baking box body, and the rotating clamp drives the gear transmission structure through the transmission assembly so that the gear transmission structure can rotate. A PLC is arranged in the baking oven body, and the problems that in the prior art, due to the position limitation of a heat source, a PCB is heated unevenly, the drying effect is affected, local overheating or insufficient temperature of the PCB is caused, and then the electrical performance and the structural stability of the PCB are damaged are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of printed circuit board baking, and more specifically, to a printed circuit board baking device. Background Art

[0002] A printed circuit board, i.e., a PCB board, is a key carrier for electrical connections between electronic components. In the production process of PCB boards, baking is an essential pre-treatment step. The main purposes of baking include removing the moisture absorbed by the PCB board during production, storage, and transportation, reducing deformation during heating, and improving electrical performance. The presence of moisture may rapidly vaporize during high-temperature soldering, leading to problems such as poor soldering or board explosion, seriously affecting product quality. In addition, baking can also remove oxides and contaminants on the surface of the PCB board, improving the conductivity of the conductors.

[0003] However, existing hot plate drying equipment often has limitations. Usually, heat sources are only provided at the top or rear side, resulting in uneven heating of the PCB board. This uneven heating method not only affects the drying effect but may also cause local overheating or insufficient temperature of the PCB board, thereby damaging its electrical performance and structural stability. Summary of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides a printed circuit board baking device to solve the above problems.

[0005] The utility model is implemented as follows:

[0006] A printed circuit board baking device includes a baking oven body. An operating table is provided on the inner bottom wall thereof. An embedding groove is opened at the center of the top of the operating table. An electromagnet is provided at the bottom of the embedding groove. A rotary fixture is detachably arranged in the embedding groove. The rotary fixture includes a base and a rotary clamping frame. The base is attracted by the magnetic force of the electromagnet. Support plates are provided at both ends of the top of the base. Rotary frames are provided on both sides of the rotary clamping frame. The rotary frames are respectively rotatably connected to the adjacent support plates. A gear transmission structure is provided on the rotary frame near the left side. A transmission component is provided on the left side inside the baking oven body. After the rotary fixture is magnetically fixed in the embedding groove, the rotary fixture drives the gear transmission structure through the transmission component to make it rotate. A PLC controller is provided inside the baking oven body. The PLC controller is electrically connected to the electromagnet and the transmission component respectively.

[0007] In an embodiment of the utility model, the rotary clamping frame includes a plurality of limiting blocks provided on the inner side near the bottom on one side, and two locking buttons are symmetrically arranged along the center in the length direction on the front side of the rotary clamping frame.

[0008] In an embodiment of the present utility model, two rubber support columns are provided on the top of the limit block.

[0009] In an embodiment of the present utility model, the rotary frame includes a rotary shaft provided at the center of one side thereof, and fixing blocks provided near both ends of the other side. One side of each fixing block has a fixing groove, and the edge in the length direction of the rotary clamping frame is fixed in the fixing groove. The rotary shafts are respectively rotatably provided on the opposite sides of the two support plates.

[0010] In an embodiment of the present utility model, the gear transmission structure includes a transmission shaft movably provided on the left support plate. A third gear is provided at the left end of the transmission shaft, and a second gear is provided at the right end thereof. A first gear is provided on the rotary shaft between the rotary frame and the support frame on this side. The first gear meshes with the second gear.

[0011] In an embodiment of the present utility model, the transmission assembly includes a transmission box provided on the left side inside the baking oven body. The inside of the transmission box is an installation cavity. A first moving groove is opened at the top of the transmission box, and a second moving groove communicating with the first moving groove is opened at the front side of the transmission box. A stepping motor is provided on the bottom wall of the installation cavity. The end of the output shaft of the stepping motor has a transmission gear. When the rotary fixture is placed on the embedding groove, the second gear passes through the top of the first moving groove to the inside of the installation cavity. The transmission shaft moves in the length direction of the first moving groove, and finally the second gear meshes with the transmission gear on the stepping motor. The PLC controller is electrically connected to the stepping motor.

[0012] In an embodiment of the present utility model, a lifting platform is provided on the bottom wall of the installation cavity, and the stepping motor is provided on the top of the lifting platform.

[0013] In an embodiment of the present utility model, the lifting platform includes a mounting plate and an electric push rod. The electric push rod is provided on the bottom wall of the installation cavity. The end of the output shaft of the electric push rod is connected to the center of the bottom of the mounting plate. A plurality of telescopic columns are provided between the bottom of the mounting plate and the bottom wall of the installation cavity. The stepping motor is provided on the top of the mounting plate. When the rotary fixture is arranged in the embedding groove, only when the electric push rod is fully extended, the transmission gear of the stepping motor meshes with the second gear. The electric push rod is electrically connected to the PLC controller.

[0014] The beneficial effects of the present utility model are as follows: Through the design of the rotating fixture, the PCB board can continuously rotate during the baking process, ensuring that all parts are evenly heated and avoiding the problem of uneven heating caused by the fixed position of the heat source in the traditional baking method; the rotating fixture adopts a magnetic adsorption fixing method, which is convenient and fast to install and disassemble, improving production efficiency; through the adjustment of the lifting platform, it can be ensured that the stepping motor starts working only after the rotating fixture is completely fixed, thus avoiding the problem of poor gear meshing caused by inaccurate position. This precise control improves the stability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of a printed circuit board baking device provided by an embodiment of the present utility model;

[0017] Figure 2 It is a partial cross-sectional structural diagram of the baking oven body provided by an embodiment of the present utility model;

[0018] Figure 3 It is a schematic structural diagram of the rotating fixture provided by an embodiment of the present utility model;

[0019] Figure 4 For Figure 3 the enlarged view of part A in

[0020] Figure 5 For Figure 3 the enlarged view of part B in

[0021] Figure 6 It is a communication block diagram provided by an embodiment of the present utility model.

[0022] In the figure: 10, baking oven body; 11, operating table; 12, embedding groove; 1201, electromagnet; 13, PLC controller; 20, rotary fixture; 21, base; 22, support plate; 23, rotary clamping frame; 2301, limit block; 2302, rubber support column; 2303, lock catch; 24, rotary frame; 2401, fixing block; 2402, rotary shaft; 25, gear transmission structure; 2501, first gear; 2502, transmission shaft; 2503, second gear; 2504, third gear; 30, transmission component; 31, transmission box; 3101, first movable groove; 3102, second movable groove; 32, stepper motor; 33, lifting table; 3301, mounting plate; 3302, electric push rod; 3303, telescopic column. Detailed implementation mode

[0023] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] As Figures 1-3As shown in the figure, the utility model provides a printed circuit board baking device, which includes an oven body 10. An operating table 11 is arranged on the inner bottom wall of the oven body 10. An embedding groove 12 is opened at the center of the top of the operating table 11. An electromagnet 1201 is arranged at the bottom of the embedding groove 12. A rotating fixture 20 is detachably arranged in the embedding groove 12. The rotating fixture 20 includes a base 21 and a rotating clamping frame 23. The base 21 is attracted by the magnetic force of the electromagnet 1201. Support plates 22 are arranged at both ends of the top of the base 21. Rotating frames 24 are arranged on both sides of the rotating clamping frame 23. The rotating frames 24 are respectively rotatably connected to the adjacent support plates 22. A gear transmission structure 25 is arranged on the rotating frame 24 close to the left side. A transmission component 30 is arranged on the left side inside the oven body 10. After the rotating fixture 20 is magnetically fixed in the embedding groove 12, the rotating fixture 20 can drive the gear transmission structure 25 through the transmission component 30 to make it rotate. A PLC controller 13 is arranged inside the oven body 10. The PLC controller 13 is electrically connected to the electromagnet 1201 and the transmission component 30 respectively. By rotating the PCB, it can be evenly heated during baking, ensuring the baking effect of the PCB board, which is of great significance for improving the production quality and efficiency of the PCB board.

[0026] As Figure 3 shown, the rotating clamping frame 23 includes a plurality of limiting blocks 2301 arranged on the inner side close to the bottom, and two locking latches 2303 are symmetrically arranged along the center in the length direction of the front side of the rotating clamping frame 23.

[0027] As a preferred embodiment, as Figure 5 shown, two rubber support columns 2302 are arranged on the top of the limiting block 2301. To ensure that the surface of the PCB board is heated more comprehensively and avoid uneven local heating caused by shielding, which affects the production quality, the contact area between the rotating clamping frame 23 and the PCB board is reduced by setting the rubber support columns 2302.

[0028] As Figure 4 shown, the rotating frame 24 includes a rotating shaft 2402 arranged at the center of one side and fixing blocks 2401 arranged close to both ends of the other side. A fixing groove is provided on one side of the fixing block 2401. The edge in the length direction of the rotating clamping frame 23 is fixed in the fixing groove. The rotating shaft 2402 is respectively rotatably arranged on the opposite sides of the two support plates 22.

[0029] In this embodiment, the gear transmission structure 25 includes a transmission shaft 2502 movably arranged on the left support plate 22. A third gear 2504 is arranged at the left end of the transmission shaft 2502, and a second gear 2503 is arranged at the right end. A first gear 2501 is arranged on the rotating shaft 2402 between the rotating frame 24 on this side and the support frame. The first gear 2501 meshes with the second gear 2503.

[0030] As a preferred embodiment, a heat-insulating coating is applied on the rotary jig 20, and the material thereof is silicate. Through this heat-insulating coating, the temperature of the outer surface of the jig can be significantly reduced, avoiding scalding incidents when taking it out after baking is completed.

[0031] As Figure 2 and Figure 6 As shown in [FIGURE NUMBERS NOT PROVIDED], the transmission assembly 30 includes a transmission box 31 disposed on the left side inside the baking oven body 10. The interior of the transmission box 31 is an installation cavity. A first movable slot 3101 is formed at the top of the transmission box 31, and a second movable slot 3102 communicating with the first movable slot 3101 is formed at the front side of the transmission box 31. A stepping motor 32 is disposed on the bottom wall of the installation cavity. The end of the output shaft of the stepping motor 32 has a transmission gear. When the rotary jig 20 is placed on the embedding slot 12, the second gear 2503 passes through from the top of the first movable slot 3101 to the inside of the installation cavity, and the transmission shaft 2502 moves in the length direction of the first movable slot 3101, finally making the second gear 2503 mesh with the transmission gear on the stepping motor 32. The PLC controller 13 is electrically connected to the stepping motor 32.

[0032] As a preferred embodiment, a lifting platform 33 is disposed on the bottom wall of the installation cavity. The lifting platform 33 includes a mounting plate 3301 and an electric push rod 3302. The electric push rod 3302 is disposed on the bottom wall of the installation cavity. The end of the output shaft of the electric push rod 3302 is connected to the center of the bottom of the mounting plate 3301. A plurality of telescopic columns 3303 are disposed between the bottom of the mounting plate 3301 and the bottom wall of the installation cavity. The stepping motor 32 is disposed on the top of the mounting plate 3301. When the rotary jig 20 is disposed in the embedding slot 12, only when the electric push rod 3302 is fully extended, the transmission gear of the stepping motor 32 meshes with the second gear 2503. The electric push rod 3302 is electrically connected to the PLC controller 13. Since during the process of directly placing the rotary jig 20 on the embedding slot 12, there is a misalignment in the tooth positions between the second gear 2503 and the transmission gear of the stepping motor 32 and they cannot mesh, resulting in the base 21 not being fully disposed in the embedding slot 12. By lowering the stepping motor 32 with the lifting platform 33 before meshing, and then rising at a constant speed during the start-up process of the stepping motor 32 after the base 21 is fixed, the second gear 2503 and the transmission gear can mesh during the movement to solve the above problem.

[0033] Specifically, the working principle of this printed circuit board baking device is as follows: Place the PCB board in the rotary clamping frame 23. The rubber support columns 2302 provide support on one side, and the other side is fixed by the buckle 2303, thus fixing it on the rotary clamping frame 23. Then, place the rotary fixture 20 into the embedding groove 12. At this time, the second gear 2503 and the transmission shaft 2502 pass through the first movable groove 3101 and the second movable groove 3102 respectively. When receiving an instruction, the PLC controller 13 controls the electromagnet 1201 to turn on. At the same time, the stepping motor 32 rotates, and the electric push rod 3302 extends. When the electric push rod 3302 is fully extended, the transmission gear on the stepping motor 32 meshes with the second gear 2503, thereby driving the rotary clamping frame 23 to rotate, so that the PCB board can be better baked and heated. Through the above structure, it solves the problems in the prior art that due to the position limitation of the heat source setting, the PCB board is unevenly heated, affecting the drying effect, and causing local overheating or insufficient temperature of the PCB board, thereby damaging its electrical performance and structural stability.

[0034] It should be noted that the specific model specifications of the PLC controller 13, the electromagnet 1201, the stepping motor 32, and the electric push rod 3302 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0035] The power supply and its principle of the PLC controller 13, the electromagnet 1201, the stepping motor 32, and the electric push rod 3302 are clear to those skilled in the art, so no detailed description will be given here.

[0036] The above further describes the present invention with the aid of specific embodiments. However, it should be understood that this specific description should not be construed as a limitation on the essence and scope of the present invention. Various modifications made by those of ordinary skill in the art after reading the above embodiments all fall within the scope protected by the present invention.

Claims

1. A printed circuit board baking device, comprising an oven body (10), on the inner bottom wall of which an operating table (11) is provided, characterized in that, At the center of the top of the operation table (11), an embedding groove (12) is provided. At the bottom of the embedding groove (12), an electromagnet (1201) is provided. A rotary fixture (20) is detachably arranged in the embedding groove (12). The rotary fixture (20) includes a base (21) and a rotary clamping frame (23). The base (21) is attracted by the magnetic force of the electromagnet (1201). At both ends of the top of the base (21), support plates (22) are provided. On both sides of the rotary clamping frame (23), rotary frames (24) are provided. The rotary frames (24) are respectively rotatably connected to the adjacent support plates (22). A gear transmission structure (25) is provided on the rotary frame (24) near the left side. On the left side inside the baking oven body (10), a transmission component (30) is provided. After the rotary fixture (20) is magnetically fixed to the embedding groove (12), the rotary fixture (20) drives the gear transmission structure (25) through the transmission component (30) so that it rotates. Inside the baking oven body (10), a PLC controller (13) is provided. The PLC controller (13) is electrically connected to the electromagnet (1201) and the transmission component (30) respectively.

2. The baking device for a printed circuit board according to claim 1, characterized in that, The rotary clamping frame (23) includes a plurality of limit blocks (2301) arranged on the inner side near the bottom. On the front side of the rotary clamping frame (23) along the length direction, two lock catches (2303) are symmetrically arranged along the center.

3. The baking device for a printed circuit board according to claim 2, wherein, On the top of the limit block (2301), two rubber support columns (2302) are provided.

4. The baking device for a printed circuit board according to claim 2, characterized in that, The rotary frame (24) includes a rotary shaft (2402) arranged at the center of one side, and fixing blocks (2401) arranged near both ends of the other side. One side of the fixing block (2401) has a fixing groove. The edge of the rotary clamping frame (23) in the length direction is fixed in the fixing groove. The rotary shaft (2402) is respectively rotatably arranged on the opposite sides of the two support plates (22).

5. A printed circuit board baking device according to claim 4, characterized in that, The gear transmission structure (25) includes a transmission shaft (2502) movably arranged on the support plate (22) on the left side. At the left end of the transmission shaft (2502), a third gear (2504) is provided. At the right end, a second gear (2503) is provided. On the rotary shaft (2402) between the rotary frame (24) and the support frame on this side, a first gear (2501) is provided. The first gear (2501) meshes with the second gear (2503).

6. A printed circuit board baking device according to claim 5, characterized in that, The transmission assembly (30) includes a transmission box (31) disposed on the left side inside the baking oven body (10). The interior of the transmission box (31) is an installation cavity. A first movable groove (3101) is formed in the top of the transmission box (31), and a second movable groove (3102) communicating with the first movable groove (3101) is formed in the front side of the transmission box (31). A stepping motor (32) is disposed on the bottom wall of the installation cavity. The end of the output shaft of the stepping motor (32) has a transmission gear. When the rotary fixture (20) is placed on the embedding groove (12), the second gear (2503) passes through from the top of the first movable groove (3101) to the inside of the installation cavity. The transmission shaft (2502) moves in the length direction of the first movable groove (3101), and finally the second gear (2503) meshes with the transmission gear on the stepping motor (32). The PLC controller (13) is electrically connected to the stepping motor (32).

7. A printed circuit board baking device according to claim 6, characterized in that, A lifting platform (33) is disposed on the bottom wall of the installation cavity, and the stepping motor (32) is disposed on the top of the lifting platform (33).

8. A printed circuit board baking device according to claim 7, characterized in that, The lifting platform (33) includes a mounting plate (3301) and an electric push rod (3302). The electric push rod (3302) is disposed on the bottom wall of the installation cavity. The end of the output shaft of the electric push rod (3302) is connected to the center of the bottom of the mounting plate (3301). A plurality of telescopic columns (3303) are disposed between the bottom of the mounting plate (3301) and the bottom wall of the installation cavity. The stepping motor (32) is disposed on the top of the mounting plate (3301). When the rotary fixture (20) is disposed in the embedding groove (12), only when the electric push rod (3302) is fully extended, the transmission gear of the stepping motor (32) meshes with the second gear (2503). The electric push rod (3302) is electrically connected to the PLC controller (13).

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