PCB (Printed Circuit Board) warping degree correcting device

Abstract

The utility model relates to the technical field of PCB production, and discloses a PCB warping degree correcting device, which comprises a workbench and a PCB, the top of the workbench is fixedly connected with a support frame, the inside of the support frame is fixedly connected with a fixing box, the rear side of the fixing box is fixedly connected with a motor, the driving end of the motor is fixedly connected with a gear I, and the driving end of the gear I is fixedly connected with a gear II. The front side of the first gear is fixedly connected with a first connecting rod, the interior of the first connecting rod is rotatably connected with a rotating shaft, the interior of the fixing box is slidably connected with a sliding block, the rear side of the rotating shaft is fixedly connected with a second gear, the exterior of the rotating shaft is fixedly connected with a second connecting rod, and the front side of the sliding block is fixedly connected with a hot air cylinder. According to the utility model, the second connecting rod is driven by the motor to pull the sliding block to slide in the fixed box in a reciprocating manner, so that hot air of the hot air cylinder is uniformly blown to the surface of the PCB in a reciprocating manner, the uniformity of the heating step is improved, and the correction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB production, in particular to a PCB board warping correction device. Background Art

[0002] PCBs, or printed circuit boards, are key components of electronic devices. Warpage is a common problem during PCB manufacturing due to a variety of factors. The material properties of PCBs are a key factor. Common PCB materials include fiberglass and epoxy resin, which expand and contract to varying degrees under varying temperature and humidity conditions. For example, during PCB processing, such as lamination of multilayer boards, internal stresses can easily build up during the cooling process after the high-temperature, high-pressure lamination process, due to the varying coefficients of thermal expansion of each layer. This can lead to warpage. Furthermore, the manufacturing process can also affect PCB warpage. During processes like etching and electroplating, improper control of parameters such as solution concentration, temperature, and processing time can lead to uneven deposition or corrosion of the PCB surface material, resulting in structural imbalance and warpage. Furthermore, during PCB assembly, factors such as high soldering temperatures and uneven component distribution can further exacerbate PCB warpage.

[0003] In the prior art, traditional PCB board leveling usually uses a laser or heat gun to heat the warped area to soften it, and then mechanically pressurizes the local area to level it. However, in the prior art, the traditional heating structure is usually fixed in position, which can easily cause uneven heating of the PCB board and affect subsequent correction operations. Therefore, a PCB board warpage correction device is proposed to solve the above problem. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a PCB board warpage correction device, which aims to improve the problem of uneven heating during correction in the prior art.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The utility model provides a PCB warping correction device, including workbench and PCB board, the top of workbench is fixedly connected with support frame, the inside of support frame is fixedly connected with fixed box, the rear side of fixed box is fixedly connected with motor, the drive end of motor is fixedly connected with gear one, the front side of gear one is fixedly connected with connecting rod no.

[0007] As a further description of the above technical solution:

[0008] The outside of the gear two is engaged with the outside of the gear one, and the front side of the connecting rod two is rotatably connected to the rear side of the sliding block.

[0009] As a further description of the above technical solution:

[0010] The bottom of the PCB board is in contact with the top of the workbench.

[0011] As a further description of the above technical solution:

[0012] The front side of the workbench is rotatably connected with a rotating box cover, and the bottom of the workbench is rotatably connected with a plurality of support seats.

[0013] As a further description of the above technical solution:

[0014] The bottom of the support frame is fixedly connected with a hydraulic rod, and the drive end of the hydraulic rod is fixedly connected with a pressing plate.

[0015] As a further description of the above technical solution:

[0016] The fixed assembly includes an electric push rod, the bottom of the electric push rod is fixedly connected inside the workbench, and the drive end of the electric push rod is fixedly connected with a piston head.

[0017] As a further description of the above technical solution:

[0018] The inside of the workbench is fixedly connected with a suction cover, the bottom of the suction cover is fixedly connected with a piston cylinder, and the inside of the suction cover is provided with an air inlet hole.

[0019] As a further description of the above technical solution:

[0020] The outside of the piston head is slidably connected inside the piston cylinder, and the top of the suction cover is in contact with the bottom of the PCB board.

[0021] The utility model has the advantages of the following:

[0022] 1. In the utility model, the driving end of the motor rotates to drive gear one to rotate, thereby driving connecting rod one to rotate, promoting gear two to make the circumferential movement of meshing around gear one, finally driving connecting rod two to pull the sliding block to reciprocatingly slide in the fixed box, making the hot air of the hot air cylinder reciprocatingly and uniformly blow on the surface of the PCB board, improving the uniformity of the heating step, avoiding new deformation caused by uneven heating, and improving the correction effect.

[0023] 2. In the utility model, the driving end of the electric push rod is retracted to drive the piston head to slide downward, at this time, the air in the piston cylinder and the suction cover is moved downward through the air inlet hole, negative pressure is generated in the suction cover, thereby tightly adsorbing the bottom of the PCB board, fixing the PCB board on the top of the workbench, avoiding the shaking of the PCB board, and improving the accuracy of the correction device. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A perspective view of a PCB board warping degree correction device is provided for the utility model;

[0025] Figure 2 A fixed box structure schematic view of a PCB board warping degree correction device is provided for the utility model;

[0026] Figure 3 A workbench structure schematic view of a PCB board warping degree correction device is provided for the utility model;

[0027] Figure 4 A piston cylinder structure schematic view of a PCB board warping degree correction device is provided for the utility model.

[0028] LEGEND:

[0029] 1. Workbench; 2. Support seat; 3. Support frame; 4. Hydraulic rod; 5. Rotating box cover; 6. Pressing plate; 7. PCB board; 8. Fixed box; 9. Motor; 10. Gear one; 11. Connecting rod one; 12. Gear two; 13. Connecting rod two; 14. Sliding block; 15. Hot air cylinder; 16. Electric push rod; 17. Suction cover; 18. Piston cylinder; 19. Piston head; 20. Air inlet hole; 21. Rotation shaft. DETAILED DESCRIPTION

[0030] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1 , the utility model provides an embodiment: a PCB board warpage correction device, including a workbench 1 and a PCB board 7, the workbench 1 is usually made of solid steel to ensure that it has sufficient strength and stability to support the entire correction device and the PCB board 7 placed thereon, and can provide a stable foundation for the subsequent pressurization process, the top of the workbench 1 is fixedly connected with a support frame 3, the support frame 3 provides vertical support for the subsequent pressurization structure, and also provides an installation position for the subsequent heating structure, the interior of the support frame 3 is fixedly connected with a fixing box 8, the fixing box 8 is usually in the shape of a rectangular parallelepiped, and the interior of the fixing box 8 is a relatively closed space for installing subsequent transmission components, which plays a role in protecting these components from external dust and also plays a guiding role in the sliding of subsequent structures.

[0032] Reference Figures 1 to 2The rear side of the fixed box 8 is fixedly connected with a motor 9. The function of the motor 9 is to provide precise power output, drive the subsequent structure to produce a reciprocating sliding effect, so that the hot air generated by the heating structure evenly heats the PCB board 7. The driving end of the motor 9 is fixedly connected with a gear 10. The gear 10 generates self-rotation by receiving the rotational power of the motor 9, thereby driving the subsequent meshing structure to produce a circular motion around it. The front side of the gear 10 is fixedly connected with a connecting rod 11. The connecting rod 11 is used to connect the subsequent meshing structure so that it produces a limiting effect when it rotates. The internal rotation of the connecting rod 11 is connected to the rotating shaft 21. The rotating shaft 21 makes a circular motion around the gear 10, thereby driving the subsequent structure to produce orbital revolution. The internal sliding connection of the fixed box 8 is connected with a slider 14. The reciprocating sliding of the slider 14 drives the uniform movement of the heating structure, so that the hot air blown out evenly heats the PCB board 7. The rear side of the rotating shaft 21 is fixedly connected with a gear 2 12. The meshing relationship between the gear 2 12 and the gear 10 is achieved through the gear 10. The rotation drives gear 2 12 to produce meshing circular motion, driving the subsequent structure to slide back and forth. The outside of the rotating shaft 21 is fixedly connected with a connecting rod 2 13. The connecting rod 2 13 is used to connect gear 2 12 and the slider 14, transmitting power to the slider 14, causing it to slide back and forth. The front side of the slider 14 is fixedly connected with a hot air cylinder 15. The hot air cylinder 15 is cylindrical and has heating elements and fans inside. It can blow out hot air to heat the PCB board 7, making it softer at a certain temperature, which is convenient for warping correction. The inside of the workbench 1 is provided with a fixing component for fixing the PCB board 7. The outside of gear 2 12 is meshed with the outside of gear 1 10. This meshing method ensures accurate power transmission and reasonable control of the speed. The reciprocating sliding effect is achieved through two sets of gears. The front side of the connecting rod 2 13 is rotatably connected to the rear side of the slider 14, thereby realizing power transmission. The slider 14 is driven to slide back and forth through the connecting rod 2 13, and the bottom of the PCB board 7 contacts the top of the workbench 1.

[0033] Reference Figure 1 The front side of the workbench 1 is rotatably connected to a rotating box cover 5. The function of the rotating box cover 5 is to protect the tools placed inside the workbench 1 when the device is not in use, and to prevent dust, debris, etc. from entering the device and affecting the normal operation and service life of the tools and items. The bottom of the workbench 1 is rotatably connected to multiple support seats 2. The support seats 2 can fine-tune the height. When the device is placed on an uneven ground, the workbench 1 can be kept horizontal by adjusting the angle of the support seats 2 to ensure that the PCB board 7 can be placed stably on the workbench 1. The bottom of the support frame 3 is fixedly connected to a hydraulic rod 4. The function of the hydraulic rod 4 is to provide vertical power to the subsequent structure so that it can press the PCB board 7. The driving end of the hydraulic rod 4 is fixedly connected to a pressure plate 6. The pressure plate 6 is a rectangular plate-like structure. By contacting the PCB board 7, it applies pressure to level it.

[0034] Referring to Figures 3 and 4 , the fixed assembly includes an electric push rod 16, the bottom of which is fixedly connected inside the workbench 1, and the electric push rod 16 is the power source of the fixed assembly, which drives the subsequent structure to slide through the retraction of the driving end. The driving end of the electric push rod 16 is fixedly connected with a piston head 19, which is generally cylindrical in shape and made of rubber with good wear resistance and sealing performance. The inside of the workbench 1 is fixedly connected with a suction cover 17, which is bowl-shaped in overall shape. The top opening is large to provide a large contact area with the bottom of the PCB board 7, which can more evenly adsorb the PCB board 7. The bottom of the suction cover 17 is fixedly connected with a piston cylinder 18, and the outside of the piston head 19 is slidingly connected inside the piston cylinder 18. The piston cylinder 18 has good sealing performance and mechanical strength to ensure that no gas leakage occurs during the movement of the piston head 19, thereby ensuring stable changes in the internal air pressure of the suction cover 17. The inside of the suction cover 17 is provided with an air suction hole 20, which functions to form a negative pressure inside the suction cover 17 when the piston head 19 moves downward, thereby adsorbing and fixing the PCB board 7. The top of the suction cover 17 is in contact with the bottom of the PCB board 7.

[0035] Working principle: First, the staff places the PCB board 7 on the top of the suction cover 17, turns on the power switch of the electric push rod 16, and drives the piston head 19 to slide downward through the retraction of the driving end. At this time, the air inside the piston cylinder 18 and the suction cover 17 moves downward through the air suction hole 20, forming a negative pressure inside the suction cover 17, thereby tightly adsorbing the bottom of the PCB board 7 and fixing the PCB board 7 on the top of the workbench 1, which can provide stable and reliable fixation for the PCB board 7. During the subsequent operation of heating and pressurizing to correct the warping degree, it is ensured that the PCB board 7 will not be displaced or shaken due to external interference, thereby effectively improving the precision and accuracy of the correction operation. Avoiding the correction error caused by the insecure fixation of the PCB board 7, the quality and consistency of the product are improved.

[0036] Secondly, the power switch of the motor 9 is turned on, the driving end of the motor 9 is rotated to drive the gear one 10 to rotate, thereby driving the connecting rod one 11 to rotate, prompting the gear two 12 to make a meshing circumferential motion around the gear one 10, and finally driving the connecting rod two 13 to pull the sliding block 14 to reciprocatingly slide inside the fixed box 8, so that the hot air of the hot air cylinder 15 is reciprocatingly and uniformly blown on the surface of the PCB board 7. During the heating process, uniform heat distribution can avoid new stress or deformation of the PCB board 7 due to local overheating or overcooling, ensuring the stability and consistency of the heating process, reducing the risk of product quality fluctuations caused by human factors, and providing reliable technical support for large-scale and high-quality PCB board 7 production and processing, thereby better guaranteeing the quality and effect of the warping degree correction work.

[0037] It should be pointed out finally that: the above only for the preferred embodiments of the present application have, and not for limiting the present application, although the present application is described in detail with reference to the foregoing embodiments, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A PCB warpage correction device, comprising a workbench (1) and a PCB board (7), characterized in that: The top of the workbench (1) is fixedly connected to a support frame (3), the interior of the support frame (3) is fixedly connected to a fixed box (8), the rear side of the fixed box (8) is fixedly connected to a motor (9), the driving end of the motor (9) is fixedly connected to a gear 1 (10), the front side of the gear 1 (10) is fixedly connected to a connecting rod 1 (11), the interior of the connecting rod 1 (11) is rotatably connected to a rotating shaft (21), the interior of the fixed box (8) is slidably connected to a slider (14), the rear side of the rotating shaft (21) is fixedly connected to a gear 2 (12), the exterior of the rotating shaft (21) is fixedly connected to a connecting rod 2 (13), the front side of the slider (14) is fixedly connected to a hot air cylinder (15), and a fixing component for fixing the PCB board (7) is provided inside the workbench (1).

2. The PCB warpage correction device according to claim 1, wherein: The outside of the second gear (12) is meshed with the outside of the first gear (10), and the front side of the second connecting rod (13) is rotatably connected to the rear side of the slider (14).

3. The PCB warpage correction device according to claim 1, wherein: The bottom of the PCB board (7) contacts the top of the workbench (1).

4. The PCB warpage correction device according to claim 1, wherein: The front side of the workbench (1) is rotatably connected to a rotating box cover (5), and the bottom of the workbench (1) is rotatably connected to a plurality of support seats (2).

5. The PCB warpage correction device according to claim 1, wherein: The bottom of the support frame (3) is fixedly connected to a hydraulic rod (4), and the driving end of the hydraulic rod (4) is fixedly connected to a pressure plate (6).

6. The PCB warpage correction device according to claim 1, characterized in that: The fixing assembly comprises an electric push rod (16), the bottom of the electric push rod (16) is fixedly connected to the inside of the workbench (1), and the driving end of the electric push rod (16) is fixedly connected to a piston head (19).

7. The PCB warpage correction device according to claim 6, characterized in that: A suction hood (17) is fixedly connected to the interior of the workbench (1), a piston cylinder (18) is fixedly connected to the bottom of the suction hood (17), and an air suction hole (20) is opened inside the suction hood (17).

8. The PCB warpage correction device according to claim 7, characterized in that: The outside of the piston head (19) is slidably connected to the inside of the piston cylinder (18), and the top of the suction cover (17) is in contact with the bottom of the PCB board (7).

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