A vacuum fixture for PCB board cutting process of a dicing machine

Abstract

This invention relates to the field of PCB board cutting technology using dicing machines, and discloses a vacuum fixture for PCB board cutting using a dicing machine. The fixture includes a vacuum fixture body, a clamping component mounted on the outer side of the vacuum fixture body, a fixture positioning plate disposed on the outer side of the vacuum fixture body, a PCB product mounted on the vacuum fixture body, and several air pipe connectors fixedly mounted on the outer side of the vacuum fixture body. A vacuum silicone suction cup is fixedly mounted on the side of the vacuum fixture body away from the fixture positioning plate. The design of the vacuum fixture body and clamping component in this invention, with the fixture being an integrated unit, ensures that the entire PCB board is adsorbed onto the fixture. Simultaneously, the vacuum fixture ensures that the adsorption force covers the entire board, while avoiding through holes, circuits, or components, reducing the risk of PCB board deformation and warping, and ensuring the cutting edge width and quality of PCB boards in the same batch.

Description

Technical Field

[0001] This invention belongs to the technical field of PCB board cutting with dicing machines, and specifically relates to a vacuum fixture for PCB board cutting process with a dicing machine. Background Technology

[0002] Dicing machines cut the process edges of PCB boards (also known as process margins or process allowances) and are a core step in the later stages of PCB manufacturing. The purpose is to remove redundant areas on the board edges used for auxiliary processing, positioning, and support, ensuring the PCB board meets the final dimensional and precision requirements. This process differs from conventional PCB depaneling (such as V-CUT depaneling or punching depaneling) and is more suitable for the precision cutting of high-density, high-precision, irregularly shaped, or ultra-thin PCB boards.

[0003] The existing PCB process edge width is 5-7mm, and the flatness error of the vacuum fixture adsorption surface of the PCB process edge is difficult to match the flatness requirements of ultra-thin PCBs. After adsorption, the PCB is prone to "virtual adsorption" (local non-adhesion). During cutting, the micro-movement caused by the cutting force of the blade leads to dimensional deviation. The distribution of adsorption holes / grooves of the fixture is fixed and cannot be adapted to the effective adsorption area of ​​PCBs of different sizes and irregular shapes. If the adsorption force is concentrated on the process edge or PCB edge, it is easy to cause warping deformation in the middle of ultra-thin boards and flexible boards. After cutting, the PCB cannot be restored to flatness. Summary of the Invention

[0004] This invention provides a vacuum fixture for the PCB cutting process of a dicing machine, which solves the technical problem in related technologies where the vacuum fixture for the PCB cutting process is prone to incomplete adsorption of ultra-thin PCBs.

[0005] This invention provides a vacuum fixture for PCB board cutting process of a dicing machine, including a vacuum fixture body, a clamping component installed on the outside of the vacuum fixture body, a fixture positioning plate provided on the outside of the vacuum fixture body, and a PCB product disposed on the vacuum fixture body;

[0006] A duct connector is fixedly installed on the outer side of the vacuum fixture body, and several duct connectors are provided. A vacuum silicone suction cup is fixedly installed on the side of the vacuum fixture body away from the fixture positioning plate, and several vacuum silicone suction cups are provided.

[0007] The clamping component includes cylinders, and several cylinders are provided. A push block is fixedly installed at the output end of the cylinder. A side stop block is fixedly installed on the side of the push block away from the cylinder. A vacuum silicone suction cup is fixedly installed on the side of the side stop block away from the fixture positioning plate. An air pipe connector is fixedly installed on the outer side of the side stop block.

[0008] In a preferred embodiment, a sealing groove is provided on the side of the vacuum fixture body away from the fixture positioning plate, and a reference block is fixedly connected to the side of the vacuum fixture body away from the fixture positioning plate, and several reference blocks are provided.

[0009] In a preferred embodiment, a number of stop screws are fixedly installed between the vacuum fixture body and the fixture positioning plate.

[0010] In a preferred embodiment, a chassis is fixedly mounted on the outside of the cylinder, the chassis is fixedly connected to the main body of the vacuum fixture, and a waterproof cover is installed on the side of the cylinder away from the chassis.

[0011] In a preferred embodiment, a support block is fixedly connected to the outside of the cylinder, and several support blocks are provided, with a grinding plate installed on the support block.

[0012] In a preferred embodiment, a positioning ring and an O-ring are installed on the fixture positioning plate, and an air pipe connector is installed on the side of the fixture positioning plate away from the positioning ring.

[0013] In a preferred embodiment, a connecting component is provided between the side block and the vacuum fixture body. Several connecting components are provided, and each connecting component includes a connecting pipe. One end of the connecting pipe is fixedly connected to the side of the vacuum fixture body near the side block, and a blocking block is fixedly installed at the other end of the connecting pipe. An airbag is fixedly connected to the outside of the blocking block.

[0014] In a preferred embodiment, the blocking block is disposed inside the side block, the end of the airbag away from the connecting pipe is fixedly connected to the side block, and the connecting pipe and the side block are slidably connected.

[0015] The beneficial effects of this invention are as follows:

[0016] The present invention relates to a vacuum fixture body and clamping components. The fixture is designed as a single unit, which facilitates product fixture changes and disassembly while maintaining precision requirements. The fixture is lightweight, with milled grooves at the bottom to reduce weight. The upper surface of the fixture avoids PCB circuits and components. The bottom of the fixture is connected to the air passage to ensure that the entire PCB board is adsorbed on the fixture. The fixture has high precision, is easy to disassemble and reassemble after changeover, and the worktable surface of the fixture maintains a parallelism accuracy of 0.01mm. At the same time, the vacuum fixture ensures that the adsorption force covers the entire board while avoiding through holes, circuits, or components, reducing the risk of PCB board deformation and warping, and ensuring the cutting edge width and quality of PCB boards in the same batch.

[0017] This invention reduces the production cost of the device by setting up a connecting component, which replaces the vacuum pump device on the outside of the side block, and eliminates the second air pipe connector. At the same time, the use of an integrated negative pressure device makes it easier to keep the air pressure inside the side block and the vacuum fixture body consistent, preventing inconsistent air pressure and situations where the pressure in some areas of the PCB product is too low, which could cause the PCB product to be cut, squeezed and moved when it is separated and fixed. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a structural schematic diagram of a portion of the present invention.

[0020] Figure 3 This is a schematic diagram of the sealing groove and reference block of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the connecting component of the present invention.

[0022] Figure 5 This is a cross-sectional structural schematic diagram of the device of the present invention.

[0023] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0024] The attached figures are labeled as follows: 1. Vacuum fixture body; 11. Air pipe connector one; 12. Vacuum silicone suction cup one; 13. Sealing groove; 14. Reference block; 15. Connecting component; 151. Connecting pipe; 152. Blocking block; 153. Airbag; 2. Clamping component; 21. Cylinder; 22. Pushing block; 23. Side block; 24. Vacuum silicone suction cup two; 25. Air pipe connector two; 26. Chassis; 27. Waterproof cover; 28. Support block; 29. ​​Grinding plate; 3. Fixture positioning plate; 31. Positioning ring; 32. Air pipe connector three; 33. O-ring; 4. Stop screw; 5. PCB product. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] like Figures 1-6 As shown, a vacuum fixture for PCB board cutting process of a dicing machine includes a vacuum fixture body 1, a clamping component 2 installed on the outside of the vacuum fixture body 1, a fixture positioning plate 3 provided on the outside of the vacuum fixture body 1, and a PCB product 5 provided on the vacuum fixture body 1.

[0027] A duct connector 11 is fixedly installed on the outer side of the vacuum fixture body 1. Several duct connectors 11 are provided. A vacuum silicone suction cup 12 is fixedly installed on the side of the vacuum fixture body 1 away from the fixture positioning plate 3. Several vacuum silicone suction cups 12 are provided.

[0028] The clamping component 2 includes a cylinder 21, and several cylinders 21 are provided. A push block 22 is fixedly installed at the output end of the cylinder 21. A side block 23 is fixedly installed on the side of the push block 22 away from the cylinder 21. A vacuum silicone suction cup 24 is fixedly installed on the side of the side block 23 away from the fixture positioning plate 3. An air pipe connector 25 is fixedly installed on the outer side of the side block 23.

[0029] It should be noted that the vacuum fixture body 1 has a hollow internal structure, and this hollow structure is interconnected with the air pipe connector 11 and the vacuum silicone suction cup 12. The fixture positioning plate 3 is a core precision connecting component that connects the vacuum adsorption fixture to the dicing machine's worktable. Its core function is to achieve rapid and accurate clamping and repeated positioning of the fixture, while providing rigid support and reference positioning for the vacuum fixture, ensuring the stability of the relative positional accuracy between the fixture and the blade spindle during the cutting process. The PCB product has a process edge width of 5-7mm. Figure 1 There are two central cylinders 21, and the side block 23 is a hollow structure, which is connected to the vacuum silicone suction cup 24 and the air tube head 2.

[0030] A sealing groove 13 is provided on the side of the vacuum fixture body 1 away from the fixture positioning plate 3. A reference block 14 is fixedly connected to the side of the vacuum fixture body 1 away from the fixture positioning plate 3. Several reference blocks 14 are provided.

[0031] It should be noted that the sealing groove 13 is equipped with a sealing device to install a silicone foam waterproof sealing strip for the vacuum fixture. Its main purpose is to prevent the vacuum fixture from leaking air and water. The reference block 14 serves as the height reference for the dicing machine on the surface of the vacuum fixture. Its core function is to ensure the vertical accuracy control of the cutting tool and the PCB surface, compensate for the PCB thickness accuracy, and improve the cutting accuracy.

[0032] A set of stop screws 4 are fixedly installed between the vacuum fixture body 1 and the fixture positioning plate 3. Several stop screws 4 are provided.

[0033] It should be noted that the stop screw 4 is a precision fastener used for precise positioning, preventing displacement, and fixing the fixture components. Its core function is to constrain the relative movement between the vacuum fixture body 1, the PCB product 5, and the dicing machine table, ensuring stable positioning accuracy during the cutting process and avoiding deviations caused by fluctuations in cutting force and vacuum adsorption force.

[0034] A chassis 26 is fixedly mounted on the outside of the cylinder 21. The chassis 26 is fixedly connected to the vacuum fixture body 1. A waterproof cover 27 is installed on the side of the cylinder 21 away from the chassis 26.

[0035] It should be noted that the waterproof cover 27 is used to protect the cylinder 21 from external moisture corrosion and extend the service life of the cylinder 21.

[0036] A support block 28 is fixedly connected to the outside of the cylinder 21. Several support blocks 28 are provided, and a grinding plate 29 is installed on the support block 28.

[0037] It should be noted that the sharpening plate 29 is a special tooling component used for sharpening, edge-sharpening, and precision calibration of cutting blades. Its core function is to restore the sharpness of the blade, correct the cutting edge angle, and ensure the radial runout accuracy of the blade, thereby stabilizing the edge quality of PCB cutting and extending the blade's service life.

[0038] The fixture positioning plate 3 is equipped with a positioning ring 31 and an O-ring 33, and an air pipe connector 32 is installed on the side of the fixture positioning plate 3 away from the positioning ring 31.

[0039] It should be noted that the positioning ring 31 is a precision annular positioning component embedded in the positioning hole of the fixture positioning plate 3. It is mostly made of stainless steel or wear-resistant copper alloy and the surface is ground. Its core function is to improve positioning accuracy, enhance guidance, and extend the life of the positioning structure. The O-ring 33 is an elastic sealing component installed in the sealing groove 13 of the fixture positioning plate 3. It is mostly made of fluororubber that is resistant to coolant, acid and alkali, or nitrile rubber that is low in cost and has good elasticity. Its core function is vacuum sealing and buffering vibration reduction. The air pipe connector 32 is a quick-connect component 15 installed at the end of the vacuum guide hole of the fixture positioning plate 3. It is mostly made of brass or stainless steel. Its core function is vacuum quick connection, flow control, and prevention of falling off.

[0040] In this embodiment, the specific implementation scenario is as follows: Before preparing to cut the edge of the PCB product 5, the vacuum fixture body 1 is first installed on the fixture positioning plate 3 and fixed with the stop screw 4. The positioning ring 31 and O-ring 33 of the fixture positioning plate 3 are better installed on the vacuum fixture body 1, and the air pipe connector 32 is connected to an external vacuum pump to reinforce the fixation of the vacuum fixture body 1. Then, the PCB product 5 is placed on the upper side of the vacuum fixture body 1, and then the cylinders 21 on both sides are started. The cylinders 21 move the push block 22, and the push block 22 moves the side... The stop block 23 clamps and fixes the PCB product 5. Then, the external vacuum pump devices of the air pipe connector 11 and the air pipe connector 25 are started together, so that several vacuum silicone suction cups 12 and 24 fix the PCB product 5 together. Then, the cutting structure of the dicing machine is started to cut the process edge of the PCB product 5. After cutting, the two external vacuum pump devices are started to restore the normal air pressure inside the equipment. Then, the cylinder 21 retracts, which drives the process waste edge on the side stop block 23 to retract. The unloading machine gripper (not shown in the diagram) grabs and removes the process waste edge.

[0041] A connecting component 15 is provided between the side block 23 and the vacuum fixture body 1. Several connecting components 15 are provided. The connecting component 15 includes a connecting pipe 151. One end of the connecting pipe 151 is fixedly connected to the side of the vacuum fixture body 1 near the side block 23. A blocking block 152 is fixedly installed at the other end of the connecting pipe 151. An airbag 153 is fixedly connected to the outside of the blocking block 152.

[0042] It should be noted that the airbag 153 is made of elastic rubber material to prevent gas from leaking out of the side block 23.

[0043] The blocking block 152 is located inside the side blocking block 23. The end of the airbag 153 away from the connecting pipe 151 is fixedly connected to the side blocking block 23, and the connecting pipe 151 and the side blocking block 23 are slidably connected.

[0044] In this embodiment, the specific implementation scenario is as follows: both the vacuum pump device outside the side block 23 and the vacuum pump device outside the vacuum fixture body 1 operate under air pressure. However, the presence of the connecting component 15 reduces the need for one vacuum pump device and multiple air pipe connectors 25, lowering production costs and facilitating the cutting of the PCB product 5. The air pipe connector 25 is sealed on the outside. At this time, the vacuum pump device outside the air pipe connector 11 is activated, and the vacuum silicone suction cup 12 is used to pick up and fix the PCB product 5. Simultaneously, the pressure inside the side block 23 is extracted through the connecting pipe 151, allowing the vacuum silicone suction cup 24 to pick up the PCB product 5. The connecting pipe 151 and the outer air bag 153 prevent the gas inside the side block 23 from leaking out.

[0045] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A vacuum jig for cutting PCB process edge of a PCB scriber, comprising a vacuum jig main body (1), characterized in that, A clamping component (2) is installed on the outside of the vacuum fixture body (1), a fixture positioning plate (3) is provided on the outside of the vacuum fixture body (1), and a PCB product (5) is provided on the vacuum fixture body (1). A duct connector (11) is fixedly installed on the outside of the vacuum fixture body (1), and several duct connectors (11) are provided. A vacuum silicone suction cup (12) is fixedly installed on the side of the vacuum fixture body (1) away from the fixture positioning plate (3), and several vacuum silicone suction cups (12) are provided. The clamping component (2) includes a cylinder (21), and there are several cylinders (21). A push block (22) is fixedly installed at the output end of the cylinder (21). A side block (23) is fixedly installed on the side of the push block (22) away from the cylinder (21). A vacuum silicone suction cup (24) is fixedly installed on the side of the side block (23) away from the fixture positioning plate (3). An air pipe connector (25) is fixedly installed on the outer side of the side block (23). The fixture positioning plate (3) is equipped with a positioning ring (31) and an O-ring (33), and an air pipe connector (32) is installed on the side of the fixture positioning plate (3) away from the positioning ring (31). A connecting component (15) is provided between the side block (23) and the vacuum fixture body (1). Several connecting components (15) are provided. Each connecting component (15) includes a connecting pipe (151). One end of the connecting pipe (151) is fixedly connected to the side of the vacuum fixture body (1) near the side block (23). A blocking block (152) is fixedly installed at the other end of the connecting pipe (151). An airbag (153) is fixedly connected to the outside of the blocking block (152).

2. The vacuum fixture for PCB board cutting process of a dicing machine according to claim 1, characterized in that, A sealing groove (13) is provided on the side of the vacuum fixture body (1) away from the fixture positioning plate (3). A reference block (14) is fixedly connected on the side of the vacuum fixture body (1) away from the fixture positioning plate (3). Several reference blocks (14) are provided.

3. A vacuum fixture for PCB board cutting process of a dicing machine according to claim 2, characterized in that, A stop screw (4) is fixedly installed between the vacuum fixture body (1) and the fixture positioning plate (3), and there are several stop screws (4).

4. A vacuum fixture for PCB board cutting process of a dicing machine according to claim 3, characterized in that, A chassis (26) is fixedly installed on the outside of the cylinder (21). The chassis (26) is fixedly connected to the vacuum fixture body (1). A waterproof cover (27) is installed on the side of the cylinder (21) away from the chassis (26).

5. A vacuum fixture for PCB board cutting process of a dicing machine according to claim 4, characterized in that, A support block (28) is fixedly connected to the outside of the cylinder (21). Several support blocks (28) are provided, and a grinding plate (29) is installed on the support block (28).

6. A vacuum fixture for PCB board cutting process of a dicing machine according to claim 5, characterized in that, The blocking block (152) is located inside the side blocking block (23). The end of the airbag (153) away from the connecting pipe (151) is fixedly connected to the side blocking block (23). The connecting pipe (151) and the side blocking block (23) are slidably connected.

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