Rigid-flex printed circuit board laser cutting jig

Abstract

The utility model discloses a laser cutting jig for a rigid-flex board. The laser cutting jig comprises a jig fixing frame, a product jig plate and a limiting cover plate, the jig fixing frame is designed to be of a frame structure with the hollow middle and is fixedly arranged on the table top of the cutting machine. The bottom of the product jig plate is in a semi-hollowed-out design, the product jig plate comprises a hollowed-out groove with an opening in the bottom, and a plurality of vertically-through adsorption holes are further formed in the product jig plate. The limiting cover plate is designed to be of a hollowed-out frame structure, and a plurality of hollowed-out windows are formed in the middle of the limiting cover plate. According to the utility model, the three layers of cutting jigs are designed to clamp and fix the thin circuit board, so that a cavity is formed between the bottom of the circuit board and the cutting table, the problem that the back surface of a product is burnt and oxidized due to sputtering and heat accumulation generated by laser cutting is greatly solved, and meanwhile, waste generated by cutting can also fall off in time, so that the production efficiency is improved. Waste materials are prevented from contaminating the bottom surface of the circuit board to affect the processing quality; the utility model has the advantages of strong practicability and strong popularization significance.

Description

Technical Field

[0001] The utility model relates to a circuit board processing device, in particular to a laser cutting jig for rigid-flexible printed circuit boards. Background Art

[0002] A PCB (Printed Circuit Board), also known as a printed circuit board or printed wiring board, is an important electronic component, a support for electronic components, and a provider of electrical connections for electronic components. Since it is made by electronic printing technology, it is called a "printed" circuit board.

[0003] In the PCB manufacturing process, laser cutting and forming is widely used in the outer shape processing of the flexible area of rigid-flexible printed circuit boards because of its advantages such as high positioning accuracy, fast processing efficiency, and high depth control accuracy. However, the bottom plate of common laser cutting machines is usually composed of a whole flat aluminum alloy platform or chemical fiber composite material. During the processing, the sputtering and heat accumulation generated by laser cutting are likely to cause charring and oxidation on the back of the product, ultimately resulting in poor product appearance. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a laser cutting jig for rigid-flexible printed circuit boards in view of the deficiencies in the prior art.

[0005] A laser cutting jig for rigid-flexible printed circuit boards includes a jig fixing frame, a product jig plate, and a limit cover plate. The jig fixing frame is designed as a frame structure with a hollow middle part, and it is fixedly installed on the cutting machine table. At the four corners of the jig fixing frame, there are also laminated positioning columns. At the four corners of the product jig plate, there are first laminated positioning holes and product positioning columns. The product jig plate is laminated on the jig fixing frame from top to bottom, and the laminated positioning columns pass through the first laminated positioning holes. The bottom of the product jig plate is designed with a semi-hollow structure, which includes a hollow groove with an opening at the bottom. The hollow groove corresponds to the hollow position of the jig fixing frame up and down. There are also several adsorption holes penetrating the product jig plate up and down. The limit cover plate is designed as a hollow frame structure, with several grid-shaped hollow windows in the middle. At the four corners of the limit cover plate, there are also second laminated positioning holes and product positioning holes. The limit cover plate is laminated on the product jig plate from top to bottom, and the laminated positioning columns and product positioning columns pass through the second laminated positioning holes and product positioning holes respectively.

[0006] Furthermore, on both sides of the jig fixing frame, there are first adsorption grooves, and on both sides of the product jig plate, there are second adsorption grooves. Both the first adsorption grooves and the second adsorption grooves are designed as long hole structures and penetrate the upper and lower ends of the jig fixing frame and the product jig plate respectively. The first adsorption grooves are also arranged corresponding to the second adsorption grooves up and down.

[0007] Furthermore, a magnet placement groove is provided at the edge of the product fixture board, and a magnet is snap-fitted in the magnet placement groove. A magnetic metal is provided inside the limit cover plate, and the magnetic metal corresponds to the magnet vertically and attracts and fixes each other.

[0008] Furthermore, a first triangular notch is provided at a set of diagonals of the fixture fixing frame, and a second triangular notch is provided at a set of diagonals of the product fixture board. The first triangular notch and the second triangular notch are arranged vertically and staggeredly.

[0009] Furthermore, the material of the product fixture board is aluminum alloy, and the material of the limit cover plate is stainless steel.

[0010] In summary, the beneficial effects of a laser cutting fixture for rigid-flexible printed circuit boards of the present utility model are as follows: By designing a three-layer laminated cutting fixture to clamp and fix a thin circuit board, a cavity is formed between the bottom of the circuit board and the cutting table. Then, by creating a flowing air current with negative pressure adsorption in the cavity, the problems of sputtering and heat accumulation caused by laser cutting, which result in charring and oxidation on the back of the product, are significantly improved. At the same time, the waste generated by cutting can fall off in a timely manner, avoiding the waste from contaminating the bottom surface of the circuit board and affecting the processing quality. The fixture structure is provided with adsorption holes and adsorption grooves, which can firmly adsorb and flatten the circuit board in the fixture through negative pressure adsorption. At the same time, the process of negative pressure adsorption can further improve the heat dissipation effect during laser cutting. The designed magnetic structure enables the product fixture board and the limit cover plate to be better adsorbed and fitted, thereby flattening the circuit board product to be processed to improve the cutting accuracy. The triangular notches designed at the corners enable the operator to more easily disassemble the laminated and assembled cutting fixture structure, facilitating the taking and installation of the circuit board. The present utility model has strong practicability and has strong popularization significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a top view structural schematic diagram of a fixture fixing frame of a laser cutting fixture for a rigid-flexible printed circuit board of the present utility model;

[0012] Figure 2 is a front view sectional structural schematic diagram of a fixture fixing frame of a laser cutting fixture for a rigid-flexible printed circuit board of the present utility model;

[0013] Figure 3 is a top view structural schematic diagram of a product fixture board of a laser cutting fixture for a rigid-flexible printed circuit board of the present utility model;

[0014] Figure 4 is a front view sectional structural schematic diagram of a product fixture board of a laser cutting fixture for a rigid-flexible printed circuit board of the present utility model;

[0015] Figure 5 is a top view structural schematic diagram of a limit cover plate of a laser cutting fixture for a rigid-flexible printed circuit board of the present utility model. Detailed implementation manners

[0016] In order to make the purpose, technical solutions and advantages of the utility model clearer and more understandable, the following further details the utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0017] As Figures 1 to 5 shown, the utility model provides a laser cutting fixture for a rigid-flexible printed circuit board, which includes a fixture fixing frame 10, a product fixture board 20 and a limit cover plate 30. Specifically, in this embodiment, the product fixture board 20 is made of aluminum alloy material, and the limit cover plate 30 is made of stainless steel material.

[0018] The fixture fixing frame 10 is designed in a frame structure with a hollow middle part, and it is fixedly installed on the cutting machine table. There are also overlapping positioning posts 11 at the four corners of the fixture fixing frame 10. The fixture fixing frame 10 with overlapping positioning posts 11 is more convenient for the product fixture board 20 to be stacked and positioned from top to bottom, avoiding the deviation of the product fixture board 20 during the laser cutting process and affecting the cutting accuracy.

[0019] There are first overlapping positioning holes 21 and product positioning posts 22 at the four corners of the product fixture board 20. The product fixture board 20 is stacked on the fixture fixing frame 10 from top to bottom, and the overlapping positioning posts 11 pass through the first overlapping positioning holes 21. The bottom of the product fixture board 20 is designed with a semi-hollow structure, which includes a hollow groove 23 with an open bottom. The hollow groove 23 corresponds to the hollow position of the fixture fixing frame 10 up and down. There are also several adsorption holes 24 penetrating up and down on the product fixture board 20.

[0020] The semi-hollow design at the bottom of the product fixture board 20 makes most of the bottom surface of the circuit board remain suspended when the circuit board is subjected to laser cutting processing. When the laser cuts through the bottom of the circuit board from top to bottom, a negative pressure adsorption air flow will also be generated in the suspended cavity below the circuit board under the action of the negative pressure adsorption device. The flowing negative pressure adsorption air flow will not only keep the heat generated by the laser away from the bottom surface of the circuit board, but also the sputtered waste generated during cutting will be adsorbed and fall down, thus effectively avoiding the problems of high-temperature burning of the bottom surface of the circuit board and sputtered waste contaminating the bottom surface of the circuit board.

[0021] The limiting cover plate 30 is designed in a hollow frame structure, with several grid-shaped hollow windows 31 provided in the middle thereof. Second superposition positioning holes 32 and product positioning holes 33 are also provided at the four corners of the limiting cover plate 30. The limiting cover plate 30 is superposed on the product jig plate 20 from top to bottom, and the superposition positioning posts 11 and the product positioning posts 22 respectively pass through the second superposition positioning holes 32 and the product positioning holes 33. The limiting cover plate 30 can be pressed on the upper surface of the circuit board product, and together with the product jig plate 20, the circuit board product is clamped and fixed, so that it can be cut and processed by the laser cutting device in a flattened state.

[0022] First adsorption grooves 12 are also provided on both sides of the jig fixing frame 10, and second adsorption grooves 25 are also provided on both sides of the product jig plate 20. The first adsorption grooves 12 and the second adsorption grooves 25 are both designed in a long hole structure and respectively penetrate through the upper and lower ends of the jig fixing frame 10 and the product jig plate 20. The first adsorption grooves 12 are also arranged corresponding to the second adsorption grooves 25 up and down. The adsorption grooves on both sides of the jig can firmly adsorb and flatten the circuit board in the jig through negative pressure adsorption. At the same time, the process of negative pressure adsorption can further enhance the air flow circulation inside the jig, so that the heat generated during the cutting process can be dissipated faster, avoiding adverse effects on the circuit board product caused by high temperature.

[0023] A magnet placement groove 26 is also provided at the edge of the product jig plate 20, and a magnet (not shown in the figure) is snap-fitted in the magnet placement groove 26. A magnetic metal (not shown in the figure) is provided inside the limiting cover plate 30, and the magnetic metal corresponds to the magnet up and down and attracts and fixes each other. The magnet installed in the product jig plate 20 generates a magnetic attraction force on the limiting cover plate 30, making the clamping force between the two stronger, better fixing the circuit board product and flattening it, thereby further improving the accuracy of laser cutting.

[0024] First triangular notches 13 are provided at a set of diagonal corners of the jig fixing frame 10, and second triangular notches 27 are provided at a set of diagonal corners of the product jig plate 20. The first triangular notches 13 and the second triangular notches 27 are arranged staggered up and down. The triangular notches facilitate the operator to easily disassemble the jig fixing frame 10, the product jig plate 20 and the limiting cover plate 30 that are superposed to form the jig, so as to better take the circuit board product.

[0025] In summary, the beneficial effects of the laser cutting fixture for rigid-flex printed circuit board of the present utility model are as follows: By designing a three-layer laminated cutting fixture to clamp and fix the thin circuit board, a cavity is formed between the bottom of the circuit board and the cutting table. Then, by creating a flowing air current with negative pressure adsorption in the cavity, the problems of sputtering and heat accumulation caused by laser cutting, such as charring and oxidation on the back surface of the product, are significantly improved. At the same time, the waste generated by cutting can fall off in a timely manner, avoiding the waste from contaminating the bottom surface of the circuit board and affecting the processing quality; The fixture structure is provided with adsorption holes 24 and adsorption grooves, which can firmly adsorb and flatten the circuit board in the fixture through negative pressure adsorption. At the same time, the process of negative pressure adsorption can further improve the heat dissipation effect during laser cutting; The magnetic attraction structure is designed to enable the product fixture plate 20 and the limit cover plate 30 to be better adsorbed and fitted, so as to flatten the circuit board product to be processed and improve the cutting accuracy; The triangular notches designed at the corners can make it easier for the operator to disassemble the laminated and assembled cutting fixture structure, facilitating the picking up or installation of the circuit board; The present utility model has strong practicability and has great significance for popularization.

[0026] The above-described embodiments merely represent one implementation mode of the utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several modifications and improvements can be made, and these all fall within the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A laser cutting fixture for rigid-flex printed circuit boards, characterized in that: It includes a fixture fixing frame, a product fixture plate and a limit cover plate; the fixture fixing frame is designed as a frame structure with a hollow middle part, and it is fixedly installed on the cutting machine table. There are also overlapping positioning posts at the four corners of the fixture fixing frame; there are first overlapping positioning holes and product positioning posts at the four corners of the product fixture plate. The product fixture plate is stacked on the fixture fixing frame from top to bottom, and the overlapping positioning posts pass through the first overlapping positioning holes; the bottom of the product fixture plate is designed with a semi-hollow structure, which includes a hollow groove with an open bottom. The hollow groove corresponds to the hollow position of the fixture fixing frame up and down. There are also several adsorption holes penetrating up and down on the product fixture plate; the limit cover plate is designed as a hollow frame structure, with several grid-shaped hollow windows in the middle. There are also second overlapping positioning holes and product positioning holes at the four corners of the limit cover plate. The limit cover plate is stacked on the product fixture plate from top to bottom, and the overlapping positioning posts and product positioning posts pass through the second overlapping positioning holes and product positioning holes respectively.

2. The laser cutting fixture for rigid-flex printed circuit board according to claim 1, wherein: There are also first adsorption grooves on both sides of the fixture fixing frame, and second adsorption grooves on both sides of the product fixture plate. The first adsorption grooves and the second adsorption grooves are both designed as long hole structures and penetrate through the upper and lower ends of the fixture fixing frame and the product fixture plate respectively. The first adsorption grooves are also arranged corresponding to the second adsorption grooves up and down.

3. The laser cutting fixture for rigid-flex printed circuit board according to claim 1, wherein: There is also a magnet placement groove on the edge of the product fixture plate, and a magnet is snap-fitted in the magnet placement groove; there is a magnetic metal in the limit cover plate, and the magnetic metal corresponds to the magnet up and down and attracts and fixes each other.

4. The laser cutting fixture for rigid-flex printed circuit board according to claim 1, wherein: There are first triangular notches at a set of opposite corners of the fixture fixing frame, and second triangular notches at a set of opposite corners of the product fixture plate. The first triangular notches and the second triangular notches are arranged staggered up and down.

5. The laser cutting fixture for rigid-flex printed circuit board according to claim 1, wherein: The material of the product fixture plate is aluminum alloy material, and the material of the limit cover plate is stainless steel material.

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