PCB (Printed Circuit Board) burr polishing equipment

Abstract

The invention relates to the field of burr grinding equipment, in particular to PCB burr grinding equipment which comprises a grinding box, a grinding part, a moving assembly and the like. Grinding pieces for grinding the side edges of a PCB body are symmetrically arranged at the top and the bottom in the grinding box, a moving assembly arranged on the grinding box pushes the PCB body to the grinding pieces to be ground, the moving assembly comprises an n-shaped piece, a sliding rail, a clamping piece and a rotating shaft, a transverse sliding rail is arranged on one longitudinal inner wall of the grinding box, and the transverse sliding rail is arranged on the other longitudinal inner wall of the grinding box. An n-shaped piece is slidably installed on the sliding rail, and rotating shafts are movably installed at the two ends of the n-shaped piece. The PCB body is pushed into or pulled out of the grinding box through the moving assembly, burrs on the edge of the PCB body are ground through the grinding piece, the burrs at the drilling position of the PCB body are subjected to jet grinding through the jet assembly, and therefore the burrs on the PCB body are efficiently ground.

Description

Technical Field

[0001] The invention relates to the field of polishing equipment, and in particular to a PCB board polishing equipment. Background Art

[0002] PCB (printed circuit board) is one of the important components of the electronics industry. Almost every electronic device, from electronic watches and calculators to computers, communication electronic equipment, and military weapon systems, as long as there are electronic components such as integrated circuits, must use printed circuit boards to make electrical interconnections between the components.

[0003] After the circuit board is initially cut and formed, it is necessary to drill holes at the locations where electronic components are installed on the circuit board so as to conduct and solder the electronic components. After the circuit board is initially cut and formed, due to the cutting process, the PCB circuit board will produce raised burrs, burrs, tips, sharp corners, etc. after drilling, trimming and other mechanical processing. Burrs bring many adverse effects to the subsequent process production of PCB circuit boards, such as poor conduction of electronic components, causing circuit short circuits and burning and other safety issues; therefore, the burrs on the circuit board need to be polished and eliminated before the next step can be carried out.

[0004] At present, the grinding of the burr of the PCB board is generally performed by grinding its surface with a grinding machine. However, after the PCB board is drilled, the burrs in the holes drilled in the PCB board cannot be effectively polished away when the grinding machine grinds its surface. Therefore, it is generally necessary to manually use a jet grinder to perform jet grinding on all the holes. For a thicker PCB board, it is also necessary to perform jet grinding on all the holes on both sides of the PCB board one by one, which leads to low grinding efficiency.

[0005] Based on this, it is urgent to design a PCB board flash grinding device with a flipping function and capable of efficiently grinding the flash inside the hole on the PCB board. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a PCB board front grinding device, including a grinding box, a grinding piece, a moving component and a flipping component, wherein the grinding pieces for grinding the side edges of the PCB board body are symmetrically arranged on the top and bottom of the grinding box, and the moving component arranged on the grinding box pushes the PCB board body onto the grinding piece for grinding, and the moving component includes an n-shaped piece, a slide rail, a clamping piece and a rotating shaft, and a transverse slide rail is arranged on a longitudinal inner wall of the grinding box, and the slide rail is slidably installed with the n-shaped part, the rotating shafts are movably installed at both ends of the n-shaped part, and the clamping parts for clamping the PCB board body are installed at the opposite ends of the two rotating shafts. The flip assembly for flipping the PCB board body 180 degrees is arranged in the polishing box, and the flip assembly includes a first connecting part, a triangular plate a, a triangular plate b, a rack and a gear. The first connecting part is installed on the lower outer wall of the n-shaped part facing the inside of the polishing box, the triangular plate a is slidably installed on the first connecting part, and the rack is slidably installed on the triangular plate a. The gear that can mesh with the rack is installed on the rotating shaft connected to the clamping part with the opening facing away from the triangular plate a, and a triangular plate b is arranged on the inner wall of the polishing box.

[0007] Preferably, the inclined surface of the triangular plate a contacts and cooperates with the inclined surface of the triangular plate b and generates a squeezing force thereon.

[0008] Preferably, the number of teeth on the rack is half the number of teeth on the gear.

[0009] Preferably, the teeth on the rack and the gear are both in the form of right triangles.

[0010] Preferably, the moving assembly further comprises a limiting roller, and the lower part of the polishing box is provided with the limiting roller for providing a limit for convenient movement of the PCB board body, and the limiting roller and the grinding piece are arranged on the same straight line.

[0011] Preferably, the polishing box is provided with a spray assembly for spray-polishing the burrs at the drilled holes on the PCB board body, the spray assembly comprises a dry ice blasting machine installed on the polishing box and a spray nozzle installed in the polishing box and connected to the dry ice blasting machine, and the spray nozzle is arranged toward the PCB board body.

[0012] Preferably, it also includes a second connecting piece and a wedge-shaped limit block. The second connecting piece is installed on the upper outer wall of the n-shaped piece facing the inner side of the polishing box. The wedge-shaped limit block that enables the gear to rotate in one direction is slidably installed on the second connecting piece. The right-angled side of the wedge-shaped limit block contacts and cooperates with the right-angled side of the tooth shape on the gear to limit the rotation direction of the gear.

[0013] Preferably, it further comprises a limiting rod, and the clamping member with its opening facing away from the triangular plate a is provided with two circular grooves symmetrically centered on the rotating shaft, and the limiting rod installed on the n-shaped member is movably inserted into the circular grooves.

[0014] Preferably, a prying assembly is also included, which includes an L-shaped rod, a prying rod and a thrust stop plate. The L-shaped rod is installed on one side of the opening of the polishing box, and the thrust stop plate is provided on the rotating shaft connected to the clamping member with the opening facing the inner side of the polishing box. The prying rod is rotatably installed on the n-shaped member, one end of the prying rod is in contact with the thrust stop plate, and the other end is in contact with the L-shaped rod.

[0015] Preferably, a collecting frame is further included, and rectangular through grooves are opened on both sides of the bottom of the polishing box with the grinding piece as the center, and the collecting frame is movably arranged directly below the through grooves.

[0016] The beneficial effects of the present invention are as follows: 1. Push the PCB body into or out of the polishing box through the moving component, polish the edge of the PCB body through the grinding piece, and spray polish the edge of the drilled hole on the PCB body through the spray component, so that the edge on the PCB body can be polished efficiently; 2. At the same time, through the abutment and cooperation between the inclined surfaces of the triangle plate a and the triangle plate b, the triangle plate a drives the rack to move horizontally along the first connecting piece under the extrusion of the triangle plate b, and the rack drives the gear to rotate 180 degrees counterclockwise, thereby turning over the PCB body. When the PCB body moves to the outside of the polishing box, the jet assembly jets and polishes the burrs at the drilled holes of the PCB body that has completed the turning operation, thereby realizing the efficient polishing function of the double-sided drilled holes of the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the grinding box and the grinding piece of the present invention.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the movable assembly and the polishing box of the present invention.

[0020] Figure 4 It is a schematic diagram of the connection structure between the n-type member and the clamping member in the moving assembly of the present invention.

[0021] Figure 5 A schematic diagram of the installation structure of the n-type member, the clamping member and the limiting rod is collected for the present invention.

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the grinding box and the injection assembly of the present invention.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure inside the polishing box of the present invention.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the flip assembly of the present invention.

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the prying assembly and the polishing box of the present invention.

[0026] Fig.10 For the present invention Fig. 9 A local enlarged schematic diagram of point A.

[0027] Fig.11 It is a three-dimensional structural schematic diagram of the polishing box and the collection frame of the present invention.

[0028] The marks in the accompanying drawings are: 1-polishing box, 101-grinding part, 11-PCB board body, 2-moving assembly, 201-n-type part, 202-slide rail, 203-clamping part, 204-limiting roller, 205-rotating shaft, 2051-thrust baffle, 3-spraying assembly, 301-dry ice blasting machine, 302-spray nozzle, 4-flipping assembly, 400-first connecting part, 401-triangular plate a, 4011-triangular plate b, 402-rack, 403-gear, 404-wedge-shaped limiting block, 4041-second connecting part, 406-reset spring, 5-prying assembly, 501-L-shaped rod, 502-prying rod, 6-limiting rod, 7-collection frame. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] In the description of the present application, it should be understood that the terms "middle", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0031] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, a PCB board front grinding device includes a grinding box 1, a grinding piece 101, a moving component 2 and a turning component 4. The grinding pieces 101 for grinding the side of the PCB board body 11 are symmetrically arranged on the top and bottom of the inner side of the grinding box 1. The moving component 2 arranged on the grinding box 1 pushes the PCB board body 11 onto the grinding piece 101 for grinding. Figure 3 and Figure 4 As shown, the moving assembly 2 includes an n-shaped member 201, a slide rail 202, a clamping member 203, a rotating shaft 205 and a limiting roller 204. The slide rail 202 is horizontally arranged on the inner wall of the rear side of the polishing box 1, and the n-shaped member 201 is slidably installed on the slide rail 202. The rotating shafts 205 are rotatably installed at both ends of the n-shaped member 201. The shapes of the rotating shafts 205 on both sides are different. The clamping members 203 for clamping the PCB board body 11 are installed at the opposite ends of the two rotating shafts 205, and are installed on the right side of the n-shaped member 201. A compression spring is wound around the rotating shaft 205, and the compression spring is arranged between the clamping member 203 and the n-shaped member 201. The arrangement of the compression spring can effectively clamp the PCB board body 11 of different lengths. A limiting roller 204 is installed at the lower part of the polishing box 1 to provide a limit for the convenient movement of the PCB board body 11. The limiting roller 204 and the lower grinding member 101 are arranged on the same straight line. A flip component 4 is arranged in the polishing box 1 to flip the PCB board body 11 180 degrees. Figure 7 and Figure 8 As shown, the flip assembly 4 includes a first connecting member 400, a triangular plate a401, a triangular plate b4011, a rack 402 and a gear 403. The first connecting member 400 is installed on the lower outer wall of the left side of the n-shaped member 201. The triangular plate a401 is slidably installed on the first connecting member 400. The rack 402 is slidably installed on the triangular plate a401. A compression spring is arranged between the rack 402 and the triangular plate a401. A reset spring 406 is wound around the lower cross bar of the first connecting member 400. The triangular plate a401 is penetrated by the lower cross bar of the first connecting member 400. Both ends of the reset spring 406 are connected to the triangular plate a401, clamping A gear 403 that can mesh with a rack 402 is installed on the rotating shaft 205 on the left side of the member 203. The number of teeth on the rack 402 is half of the number of teeth on the gear 403, and the tooth shapes on the rack 402 and the gear 403 are both set in the form of right-angled triangles. A triangular plate b4011 is set on the inner wall on the left side of the polishing box 1. After the triangular plate a401 moves to the left until it contacts the triangular plate b4011, the inclined surface of the triangular plate a401 contacts and cooperates with the inclined surface of the triangular plate b4011, and the triangular plate b4011 generates an extruding force on the triangular plate a401, thereby causing the triangular plate a401 to move from back to front along the lower part of the first connecting member 400.

[0032] like Figure 6 As shown, the polishing box 1 is provided with a spray assembly 3 for spray-polishing the flash at the drilled hole on the PCB board body 11. The spray assembly 3 includes a dry ice blasting machine 301 installed on the polishing box 1 and a spray nozzle 302 installed in the polishing box 1 and connected to the dry ice blasting machine 301. The spray nozzle 302 is arranged toward the PCB board body 11, and the spray nozzle 302 is directly facing the drilled hole on the PCB board body 11. Through the cooperation of the dry ice blasting machine 301 and the spray nozzle 302, the flash in the hole on the PCB board body 11 is spray-polished.

[0033] like Figure 7 and Figure 8 As shown, it also includes a second connecting member 4041 and a wedge-shaped limit block 404. The second connecting member 4041 is installed on the upper outer wall of the n-shaped member 201 facing the inside of the polishing box 1. The second connecting member 4041 is slidably installed with a wedge-shaped limit block 404 that allows the gear 403 to rotate in one direction. A compression spring is arranged between the wedge-shaped limit block 404 and the second connecting member 4041. The arrangement of the compression spring allows the right-angled side on the wedge-shaped limit block 404 to maintain a contact and matching state with the right-angled side of the tooth shape on the gear 403, thereby limiting the rotation direction of the gear 403.

[0034] like Figure 4 and Figure 5 As shown, it also includes a limit rod 6. Two circular grooves are symmetrically opened on the left clamping piece 203 with the rotating shaft 205 as the center. The limit rod 6 installed on the left side of the N-type piece 201 can be detachably inserted into the circular groove. A compression spring is arranged between the limit rod 6 and the N-type piece 201. The arrangement of the compression spring enables the limit rod 6 to remain in a state of being stuck in the circular groove of the N-type piece 201, and maintain the clamping piece 203 and the holding piece 203 in a vertical state.

[0035] like Figure 4 , Fig. 9 and Fig.10 As shown, it also includes a prying assembly 5, which includes an L-shaped rod 501, a prying rod 502 and a thrust stop plate 2051. The L-shaped rod 501 is installed on the right side of the grinding box 1, and the thrust stop plate 2051 is arranged on the right side rotating shaft 205 of the clamping member 203. The prying rod 502 is rotatably installed on the n-shaped member 201, and one end of the prying rod 502 is in contact with the thrust stop plate 2051, and the other end is in contact with the L-shaped rod 501.

[0036] like Fig.11 As shown, a collecting frame 7 is also included. Rectangular through grooves are opened on both sides of the bottom of the grinding box 1 with the grinding piece 101 as the center. The collecting frame 7 can be detachably arranged directly below the through grooves. The flash on the PCB board body is polished and falls into the collecting frame 7 through the rectangular through grooves, realizing the function of convenient collection.

[0037] When the device is used to grind the PCB board, the PCB board body 11 is first clamped and fixed by the clamping member 203, and the PCB board body 11 is moved along the limiting roller 204 to the grinding member 101 by pushing the n-type member 201, and the grinding members 101 on the upper and lower sides grind the upper and lower edge burrs of the PCB board body 11; while the PCB board moves into the grinding box 1 through the limiting roller 204, the dry ice blasting machine 301 sprays and grinds the burrs at the drilled hole on one side of the PCB board body 11 through the spray nozzle 302, thereby efficiently grinding the side edge and the burrs at the drilled hole of the PCB board body 11; with the triangular plate a40 1 approaches and contacts the triangle plate b4011. After the triangle plate a401 contacts the hypotenuse of the triangle plate b4011, the triangle plate a401 slides from back to front along the lateral part of the lower part of the first connecting member 400 under the extrusion of the triangle plate b4011. The reset spring 406 is compressed and deformed. The rack 402 moves synchronously with the triangle plate a401 under the drive of the triangle plate a401. The right-angled side of the upper tooth shape of the rack 402 abuts against the right-angled side of the gear 403, thereby driving the gear 403 to rotate counterclockwise. The gear 403 rotates counterclockwise, and the gear 403 drives the clamping member 203 and the PCB board body 11 on the clamping member 203 through the rotating shaft 205 to rotate 1 The 80-degree rotation movement realizes the flipping function of the PCB board body 11. The n-shaped part 201 is kept vertical to the clamping part 203 through the limit rod 6, ensuring that the spray nozzle 302 is facing the front or back of the PCB board body 11, so as to realize the effective grinding of the front or back of the PCB board body 11. When the triangle plate a401 is away from the triangle plate b4011, under the elastic force of the reset spring 406, the triangle plate a401 resets from front to back along the transverse part of the lower part of the first connecting member 400, and the inclined surface of the right-angle tooth shape on the rack 402 cooperates with the inclined surface of the gear 403, and the compression spring arranged between the rack 402 and the triangle plate a401 is compressed, and the rack 402 moves downward. , thereby realizing the reset of the triangle plate a401 and the rack 402; when the transverse rod of the L-shaped rod 501 contacts the upper part of the prying rod 502, the L-shaped rod 501 drives the prying rod 502 to rotate. Under the effect of the lever principle, the lower part of the prying rod 502 applies a pushing force to the thrust stop plate 2051, and the thrust stop plate 2051 drives the rotating shaft 205 connected thereto and the clamping member 203 connected to the rotating shaft 205 to move in a direction away from the PCB board body 11, thereby releasing the clamping and limiting of the PCB board body 11 by the clamping member 203, so that the PCB board body 11 can be conveniently removed from the clamping member 203, thereby realizing the function of conveniently picking up the PCB board body 11.

[0038] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A PCB board front grinding device, comprising a grinding box (1) and a grinding piece (101), wherein the grinding piece (101) for grinding the side edge of the PCB board body (11) is symmetrically arranged at the top and bottom of the grinding box (1), characterized in that: The invention also comprises a moving component (2) and a turning component (4); the moving component (2) arranged on the polishing box (1) pushes the PCB board body (11) onto the grinding piece (101) for polishing; the moving component (2) comprises an n-shaped piece (201), a slide rail (202), a clamping piece (203) and a rotating shaft (205); a transverse slide rail (202) is arranged on a longitudinal inner wall of the polishing box (1); the n-shaped piece (201) is slidably mounted on the slide rail (202); the rotating shafts (205) are movably mounted at both ends of the n-shaped piece (201); and a clamping piece (203) is mounted on the opposite ends of the two rotating shafts (205). The clamping member (203) of the PCB board body (11) is provided in the polishing box (1) with the flip assembly (4) for flipping the PCB board body (11) by 180 degrees, the flip assembly (4) comprising a first connecting member (400), a triangular plate a (401), a triangular plate b (4011), a rack (402) and a gear (403), the first connecting member (400) being installed on the lower outer wall of the n-shaped member (201) facing the inside of the polishing box (1), the triangular plate a (401) being slidably installed on the first connecting member (400), and the rack (402) being slidably installed on the triangular plate a (401), The gear (403) that can mesh with the rack (402) is mounted on the rotating shaft (205) connected to the clamping member (203) whose opening faces away from the triangular plate a (401), and a triangular plate b (4011) is arranged on the inner wall of the polishing box (1).

2. A PCB board front grinding device according to claim 1, characterized in that: The inclined surface of the triangle plate a (401) contacts and cooperates with the inclined surface of the triangle plate b (4011) and generates a squeezing force thereon.

3. A PCB board front grinding device according to claim 1, characterized in that: The number of teeth on the rack (402) is half the number of teeth on the gear (403).

4. A PCB board front grinding device according to claim 1, characterized in that: The teeth on the rack (402) and the gear (403) are both in the shape of right triangles.

5. The PCB board front grinding equipment according to claim 1, characterized in that: The moving assembly (2) further comprises a limiting roller (204); the limiting roller (204) is installed at the lower part of the grinding box (1) to provide a limit for convenient movement of the PCB board body (11); the limiting roller (204) and the grinding piece (101) are arranged on the same straight line.

6. A PCB board front grinding device according to claim 1, characterized in that: The polishing box (1) is provided with a spray assembly (3) for spray-polishing the burrs at the drilled holes on the PCB board body (11); the spray assembly (3) comprises a dry ice blasting machine (301) mounted on the polishing box (1) and a spray nozzle (302) mounted in the polishing box (1) and connected to the dry ice blasting machine (301); the spray nozzle (302) is arranged toward the PCB board body (11).

7. A PCB board front grinding device according to claim 1, characterized in that: It also includes a second connecting member (4041) and a wedge-shaped limiting block (404); the second connecting member (4041) is installed on the upper outer wall of the n-shaped member (201) facing the inside of the polishing box (1); the wedge-shaped limiting block (404) is slidably installed on the second connecting member (4041) for enabling the gear (403) to rotate in one direction; the right-angled side of the wedge-shaped limiting block (404) contacts and cooperates with the right-angled side of the tooth shape on the gear (403) to limit the rotation direction of the gear (403).

8. The PCB board front grinding equipment according to claim 1, characterized in that: It also includes a limiting rod (6), and two circular grooves are symmetrically opened on the clamping member (203) with the opening facing away from the triangular plate a (401) with the rotating shaft (205) as the center, and the limiting rod (6) installed on the n-shaped member (201) is movably inserted into the circular grooves.

9. The PCB board front grinding equipment according to claim 1, characterized in that: The invention also comprises a prying assembly (5), wherein the prying assembly (5) comprises an L-shaped rod (501), a prying rod (502) and a thrust stop plate (2051); the L-shaped rod (501) is mounted on one side of the opening of the polishing box (1); the thrust stop plate (2051) is arranged on the rotating shaft (205) connected to the clamping member (203) with the opening facing the inner side of the polishing box (1); the prying rod (502) is rotatably mounted on the n-shaped member (201); one end of the prying rod (502) is in contact with the thrust stop plate (2051), and the other end is in contact with the L-shaped rod (501).

10. The PCB board front grinding equipment according to claim 1, characterized in that: It also includes a collecting frame (7). The bottom of the polishing box (1) is provided with rectangular through slots on both sides centered on the grinding piece (101). The collecting frame (7) is movably arranged directly below the through slots.

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