A PCB processing method applied to LED strip lights

Abstract

The present application relates to a PCB processing method applied to LED strip lights, which includes the following steps: S1: Connect both ends of a plurality of strip-shaped PCB boards to two panel PCB boards respectively to form a processed PCB board, wherein a milling slot for a milling cutter to pass through is formed between adjacent strip-shaped PCB boards; S2: Fix the processed PCB board on the working station through the two panel PCB boards; S3: Process the inner wall of the milling slot in the length direction through a milling cutter; S4: Perform V-CUT processing on the connection between the strip-shaped PCB board and the panel PCB board. The present application has the effect of making the edges of the strip-shaped PCB board smooth and straight.

Description

Technical Field

[0001] The present application relates to the technical field of PCB processing and forming, and in particular to a PCB processing method applied to LED long strip lights. Background Art

[0002] With the popularization of environmental protection and energy saving, energy-saving LED lamps have been developed in all directions. Various LED lamps have completely replaced traditional lamps. As an important component of LED lamps, PCB has appeared in various shapes. Among them, many traditional long strip lamps are also being replaced by LED lamps.

[0003] In the related art, the processing method of the long strip PCB board is to first assemble the PCB in sequence to make a V-CUT assembly, then process the entire PCB, and then perform V-CUT processing on the predetermined position between two adjacent long strip PCB boards, and finally separate the entire PCB by bending it, thereby producing multiple long strip PCB boards that meet the use of LED lamps.

[0004] Regarding the above-mentioned related technologies, there is a defect that since a V-CUT process is performed between two adjacent long strip PCB boards, burrs will exist on the board edges of the long strip PCB boards after the subsequent board separation operation, which makes it inconvenient to assemble the slender strip lamps. Summary of the invention

[0005] In order to make the board edges of a long strip PCB board smooth and straight, the present application provides a PCB processing method applied to an LED long strip light.

[0006] The present application provides a PCB processing method for LED long light bar using the following technical solutions:

[0007] A PCB processing method for LED long light bar includes the following steps:

[0008] S1: connecting two ends of a plurality of long strip PCB boards to two assembled PCB boards respectively to form a processed PCB board, wherein a milling groove for a milling cutter to pass through is formed between two adjacent long strip PCB boards;

[0009] S2: Fix the processed PCB board on the workstation through two PCB boards;

[0010] S3: Processing the inner wall of the milling groove in the length direction by a milling cutter;

[0011] S4: Perform V-CUT processing on the connection between the long strip PCB board and the assembled PCB board through a milling cutter.

[0012] By adopting the above technical solution, compared with the method of sequentially splicing multiple long strip-shaped PCB boards to make a V-CUT layout and then additionally processing the board edges in the length direction of each long strip-shaped PCB board after board separation, this design method can fix the entire processed PCB board on the workbench through two layout PCB boards. After the electronic processing is completed on the long strip-shaped PCB board, then use a milling cutter to mill the inner wall of the milling groove in the length direction, and then use a milling cutter to perform V-CUT processing on the connection between the long strip-shaped PCB board and the layout PCB board. Therefore, when performing board separation processing later, only the connection between the layout PCB board and the long strip-shaped PCB board needs to be broken, so as to be able to complete the processing of the long strip-shaped PCB board in large quantities and with high precision.

[0013] Preferably, step S3 further includes the following steps:

[0014] S31: Use a milling cutter to perform segmented milling on the inner wall of the milling groove in the length direction;

[0015] S32: Use a milling cutter to mill off the parts reserved during the segmented milling of the milling groove.

[0016] By adopting the above technical solution, since the PCB is made of fiber material, and when the milling cutter moves along the length direction of the milling groove, stress will accumulate on the PCB. Therefore, compared with the method of continuously milling the inner wall of the milling groove in the length direction by the milling cutter, this design method can adjust the milling stroke of each segment according to the size of the long strip-shaped PCB board. Then, the work generated by the acting force applied by the milling cutter is not likely to cause the long strip-shaped PCB board to shrink and deform along its own width direction, so that the board edges of the long strip-shaped PCB board can be made flatter in the length direction.

[0017] Preferably, in step S31, from the end of the milling groove close to the layout PCB board to the middle position in the length direction of the milling groove, the machining stroke and feed speed between different segments of milling by the milling cutter or the feed speed in each segment of milling decrease in a parabola with an upward opening in a linear relationship.

[0018] By adopting the above technical solution, since the processed PCB board is fixed on the workbench through two layout PCB boards, the part of the long strip-shaped PCB board closer to the middle position in its own length direction is more likely to deform. Therefore, this design method, on the one hand, the machining parameters of the milling cutter can change adaptively according to its position on the long strip-shaped PCB board, so as to better maintain the flatness of the board edges of the long strip-shaped PCB board; on the other hand, during the process of the milling cutter moving from the end close to the layout PCB board to the middle position of the long strip-shaped PCB board, the working parameters of the milling cutter do not decrease linearly. Then, while maintaining the machining accuracy of the long strip-shaped PCB board, the machining efficiency of the long strip-shaped PCB board can be improved, so that this processing method is more suitable for mass production work.

[0019] Preferably, in S31, the positions of two adjacent milling operations are respectively close to both ends of the length direction of the milling groove, for waiting for the stress at the position of the previous milling operation to disappear.

[0020] By adopting the above technical solution, since stress will still exist at the processed position of the long-strip PCB board after each section of milling, compared with the method of then performing the next section of milling at the same end of the long-strip PCB board, this design method can perform the next section of milling on the long-strip PCB board at a place far from the position of the previous milling operation to wait for the stress at the position of the previous milling operation to disappear, so that the edge of the long-strip PCB board can be made flatter.

[0021] Preferably, in S31, during the milling operation, a pulling force towards the position of the milling cutter is applied to the part of the long-strip PCB board close to the milling position, for balancing the shrinkage deformation of the long-strip PCB board, and at the same time, a pressure is also applied to make the long-strip PCB board closely adhere to the working station.

[0022] By adopting the above technical solution, on the one hand, the method of applying a pulling force during milling can balance the acting force applied to the long-strip PCB board during the milling process, so that the edge of the long-strip PCB board is less likely to be uneven. At the same time, this design method can also improve the stroke and feed speed of each section of milling to a certain extent, so as to further improve the efficiency of mass-producing PCB boards in special cases; on the other hand, the method of applying a pressure during milling can prevent the long-strip PCB board from being deformed by bending up and down during the milling process, so as to improve the overall flatness of the long-strip PCB board.

[0023] Preferably, in S31, when milling the next position of the long-strip PCB board, the acting force applied to the long-strip PCB board at the previous position still remains for a predetermined time.

[0024] By adopting the above technical solution, since stress will still exist at the processed position of the long-strip PCB board for a certain period of time after milling, the method of keeping the acting force for a predetermined time can continue to balance the residual stress at the previous position of the long-strip PCB board, so as to improve the overall flatness and edge flatness of the long-strip PCB board at the same time.

[0025] Preferably, the width dimension of the long-strip PCB board is between 8 - 20 mm. In S31, the stroke and feed speed of each section of milling by the milling cutter are negatively correlated with the width dimension of the long-strip PCB board.

[0026] By adopting the above technical solution, on the one hand, the width dimension of the strip-shaped PCB board is between 8 and 20 mm, which can enable the processing method to improve the processing accuracy of the PCB and keep the overall processing cost from being too high. On the other hand, since the direction of the force applied by the milling cutter is the width direction of the strip-shaped PCB board, when the width of the strip-shaped PCB board is larger, the stroke and feed speed of each section of milling by the milling cutter should be correspondingly reduced, so that the processing method can be adaptively changed according to the size of the strip-shaped PCB board.

[0027] Preferably, in S2, a backing plate for placing the processed PCB board is provided at the work station; in S3, the milling cutter can contact the backing plate.

[0028] By adopting the above technical solution, compared with the method that requires turning over to process the other board edge of the strip-shaped PCB board, in this design method, because there is a backing plate, the milling cutter can directly drill into the backing plate to realize the processing of the entire milling groove, so that the PCB processing method can be more concise.

[0029] Preferably, in S3, when the milling cutter is working, the chips generated by milling are synchronously sucked away.

[0030] By adopting the above technical solution, compared with the method that cannot suck away chips during milling, this design method can reduce the interference of the chips generated during milling on the flatness of the board edge of the strip-shaped PCB board, so as to further improve the flatness of the board edge of the strip-shaped PCB board and further make the assembly of the slender strip lamp more convenient.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. By the way of sequential splicing and providing milling grooves, when performing the sub-board processing subsequently, only the connection between the spliced PCB board and the strip-shaped PCB board needs to be broken, so that the processing of the strip-shaped PCB board can be completed in large quantities and with high precision.

[0033] 2. By the way of segmented milling, the stroke of each segment of milling can be adjusted according to the size of the strip-shaped PCB board, so that the work done by the force applied by the milling cutter is not likely to cause the strip-shaped PCB board to shrink and deform along its own width direction, so that the board edge of the strip-shaped PCB board in the length direction can be more flat. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram showing the state of the strip-shaped PCB on the numerical control machine in the embodiment of the present application.

[0035] Description of reference numerals: 1. Process the PCB board; 11. Long strip-shaped PCB board; 12. Panelized PCB board; 2. Milling slot; 3. Positioning hole. Detailed implementation manners

[0036] The following will Figure 1 further elaborate on this application in conjunction with the attached drawings.

[0037] The embodiment of this application discloses a PCB processing method applied to LED strip lights. Referring to Figure 1 , the PCB processing method applied to LED strip lights includes the following steps: First, perform the panelizing work. Specifically, first select a long strip-shaped PCB board 11 with a width dimension between 8 - 20 mm. Then, both ends of multiple long strip-shaped PCB boards 11 are fixedly connected to two panelized PCB boards 12 respectively. A milling slot 2 with a width of 1 mm is formed between adjacent two long strip-shaped PCB boards 11, so that a processed PCB board 1 for CNC machine tool processing is formed. At the same time, the milling slot 2 is used for the milling cutter to penetrate. Therefore, in other embodiments, the width dimension of the milling slot 2 can be correspondingly changed according to the size of the milling cutter.

[0038] Referring to Figure 1 , second, perform the workpiece fixing work. Specifically, first, each of the two panelized PCB boards 12 is provided with a positioning hole 3, and the line connecting the two positioning holes 3 is parallel to one of the diagonals of the processed PCB board 1. Second, a backing plate made of bakelite is provided on the working station of the CNC machine tool, and positioning posts are correspondingly provided on the backing plate for the two positioning holes 3 respectively. Therefore, when the workpiece needs to be fixed on the working station, it is only necessary to align the positioning hole 3 on the processed PCB board 1 with the positioning post, so as to install electronic components on the processed PCB board 1 subsequently.

[0039] Referring to Figure 1 , third, perform the milling process on the milling slot 2. Specifically, generally speaking, the milling cutter first performs segmented milling on the inner wall of the milling slot 2 in the length direction, and then processes the remaining part after segmented milling. The following points need to be noted: First, after the previous milling is completed, the position of the next milling will be selected at the other end of the long strip-shaped PCB board 11 in the length direction to reduce the influence of the stress generated on the long strip-shaped PCB board 11 during the next milling on the previous milling. Second, a suction cup cylinder and a lifting cylinder are also provided on the CNC machine tool. On the one hand, the suction cup of the suction cup cylinder can adsorb on the upper surface of the long strip-shaped PCB board 11, and the piston rod of the suction cup cylinder is used to apply a force on the long strip-shaped PCB board 11 in the width direction, so as to balance the force applied to the long strip-shaped PCB board 11 during the milling process, so that the edge of the long strip-shaped PCB board 11 can be made more flat, and thus the assembly of the thin strip-shaped lamps can be made more convenient.

[0040] Reference Figure 1 On the other hand, the lifting cylinder can apply pressure to the strip-shaped PCB board 11 through the suction cups on the suction cup cylinder. After the milling is completed, the strip-shaped PCB board 11 is not likely to bend up and down, thus improving the overall flatness of the strip-shaped PCB board 11. In addition, in this design method, when the milling cutter processes the next position, the suction cup cylinder will still adsorb on a part of the strip-shaped PCB board 11 at the previous milling position for a predetermined time, so that the acting force applied to the strip-shaped PCB board 11 can balance the residual stress at the previous position, thereby also improving the flatness of the strip-shaped PCB board 11. At the same time, the suction cup of the suction cup cylinder will release the adsorption only after the residual stress disappears. Therefore, in this embodiment, there are two groups of suction cup cylinders and lifting cylinders on the numerical control machine to cooperate with the parts at both ends of the strip-shaped PCB board 11 in the length direction respectively.

[0041] Reference Figure 1 Thirdly, because the middle position of the strip-shaped PCB board 11 is more likely to deform relative to its two ends, when the milling cutter moves from one end of the strip-shaped PCB board 11 close to the panelized PCB board 12 to the middle position in the length direction of the strip-shaped PCB board 11, firstly, between different segments of milling by the milling cutter, the closer to the middle position of the strip-shaped PCB board 11, the lower the machining stroke and feed speed will be. Secondly, in each segment of milling by the milling cutter, the closer to the middle position of the strip-shaped PCB board 11, the lower the feed speed will be. At the same time, both methods can decrease in a parabolic relationship with an upward opening in a linear relationship. Then, the working parameters of the milling cutter can adaptively change according to its position on the strip-shaped PCB board 11, so as to better maintain the flatness of the edge of the strip-shaped PCB board 11.

[0042] Reference Figure 1 Fourthly, since the degree of shrinkage deformation of the strip-shaped PCB board 11 is related to the width dimension of the strip-shaped PCB board 11, and the larger the width dimension of the strip-shaped PCB board 11, the more likely it is to deform, the machining stroke and feed speed of the milling cutter are negatively correlated with the width of the strip-shaped PCB board 11, so that this processing method can also adaptively change according to the size of the strip-shaped PCB board 11.

[0043] Reference Figure 1 Fourthly, perform pre-board-splitting treatment. Specifically, the V-CUT treatment will be carried out on the connection between the strip-shaped PCB board 11 and the panelized PCB board 12 by the milling cutter. Then, when the board-splitting treatment is carried out subsequently, the connection between the strip-shaped PCB board 11 and the panelized PCB board 12 can be directly broken off to achieve rapid board-splitting treatment, so that the processing method of the present application can also be more applicable to mass production, and thus can not only maintain the processing efficiency of the PCB but also achieve the purpose of improving the processing accuracy of the PCB.

[0044] In addition, in this embodiment, during the milling process of the milling cutter, the numerical control machine tool will be provided with an adsorption element near the milling cutter to adsorb the chips generated during the milling process, so as to reduce the unfavorable factors that affect the unevenness of the edges of the long strip-shaped PCB board 11.

[0045] The implementation principle of a PCB processing method for LED strip lights in an embodiment of the present application is as follows: Since two adjacent long strip-shaped PCB boards 11 are spaced and spliced, after the electronic processing is completed on the long strip-shaped PCB board 11, the inner wall of the cutting groove 2 in the length direction is then milled by a milling cutter, and then the connection between the long strip-shaped PCB board 11 and the spliced PCB board 12 is subjected to V-CUT processing by the milling cutter, so that both large-scale processing production can be satisfied, and the edges of the long strip-shaped PCB board 11 in the length direction can be made smoother and straighter.

[0046] The above are all the preferred embodiments of the present application. Without limiting the protection scope of the present application accordingly, therefore: Any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A PCB processing method applied to LED strip lights, characterized in that: It includes the following steps: S1: Connect both ends of multiple strip-shaped PCB boards (11) to two panel PCB boards (12) respectively to form a processed PCB board (1), and a milling slot (2) for the milling cutter to pass through is formed between adjacent strip-shaped PCB boards (11); S2: Fix the processed PCB board (1) on the working station through the two panel PCB boards (12); S3: Process the inner wall of the milling slot (2) in the length direction through a milling cutter; S4: Perform V-CUT processing on the connection between the strip-shaped PCB board (11) and the panel PCB board (12) through a milling cutter; The S3 further includes the following steps: S31: Segmentally mill the inner wall of the milling slot (2) in the length direction through a milling cutter; S32: Mill off the part reserved during the segmented milling of the milling slot (2) through a milling cutter; In the S31, along the end of the milling slot (2) close to the panel PCB board (12) to the middle position in the length direction of the milling slot (2), the processing stroke and feed speed between different segments of milling by the milling cutter or the feed speed in each segment of milling decrease in a parabola with an upward opening in a linear relationship.

2. The PCB processing method applied to LED strip lights according to claim 1, characterized in that: In the S31, the positions of adjacent two milling operations are respectively close to both ends in the length direction of the milling slot (2) to wait for the stress at the previous milling position to disappear.

3. The PCB processing method applied to LED strip lights according to claim 1, characterized in that: In the S31, during the milling operation, a pulling force towards the position of the milling cutter is applied to the part of the strip-shaped PCB board (11) close to the milling position to balance the shrinkage deformation of the strip-shaped PCB board (11), and at the same time, a pressure is also applied to make the strip-shaped PCB board (11) close to the working station.

4. The PCB processing method applied to LED strip lights according to claim 3, characterized in that: In the S31, when milling the next position of the strip-shaped PCB board (11), the acting force applied to the strip-shaped PCB board (11) at the previous position still remains for a predetermined time.

5. The PCB processing method applied to LED strip lights according to claim 1, characterized in that: The width dimension of the strip-shaped PCB board (11) is between 8 - 20 mm. In the S31, the stroke and feed speed of each segment of milling by the milling cutter are negatively correlated with the width dimension of the strip-shaped PCB board (11).

6. The PCB processing method applied to LED strip lights according to claim 1, characterized in that: In the S2, a backing plate for placing the processed PCB board (1) is provided on the working station; in the S3, the milling cutter can contact the backing plate.

7. The PCB processing method applied to LED strip lights according to claim 1, characterized in that: In the S3, during the operation of the milling cutter, the debris generated by milling is synchronously sucked away.

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