Drilling device for printed board

Abstract

The invention provides a drilling device for a printed board, and belongs to the technical field of printed board manufacturing, and the drilling device for the printed board comprises a mounting disc, a drilling mechanism, a lifting assembly, a first assembly for winding an aluminum strip, and a second assembly for releasing the aluminum strip, the installation disc comprises a guide sliding groove located in the middle of the front side of the installation disc and installation grooves symmetrically distributed in the left side and the right side of the guide sliding groove, the drilling mechanism is installed in the guide sliding groove in a sliding mode, and the drilling mechanism comprises a downward pressing piece, a drilling machine, a pressing foot, a guide piece and an elastic piece; the two ends of the downward pressing piece, the drilling machine and the pressing foot are sequentially connected to the two guiding pieces in a sleeving mode from top to bottom, and the first assembly and the second assembly can sequentially complete feeding and laying of the aluminum strip and detaching and winding of the aluminum strip in the process that the drilling mechanism descends to drill holes and ascends to reset. And the consumption of the aluminum material is reduced, and meanwhile, the time consumed for laying and disassembling the aluminum material can be shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of printed circuit board manufacturing, and in particular relates to a drilling device for a printed circuit board. Background Art

[0002] Drilling is a key step in the PCB (printed circuit board) manufacturing process, which involves creating holes on the PCB board for conductive paths or mounting components. In order to improve the quality and efficiency of drilling, and also to protect sensitive components on the PCB and prevent the drill from damaging these components, a layer of aluminum sheet is usually covered on the PCB board during the drilling operation. This practice has several main purposes: 1. Heat dissipation. Heat is generated during the drilling process. The aluminum sheet can help dissipate heat and keep the temperature of the PCB board stable; 2. Protect the board surface. The aluminum sheet can protect the PCB board from scratches and other physical damage; 3. Prevent burrs. During continuous drilling, the aluminum sheet can prevent the drill bit from being damaged or broken.

[0003] When the current PCB (printed circuit board) is covered with aluminum sheets, it is usually covered on the entire PCB by manually or mechanically fixing the aluminum sheets to ensure that the contact surface between the aluminum sheet and the PCB is flat without gaps or warping. Then screws, adhesives or other fixing methods are used, and then drilling operations are performed. Except for a small number of aluminum sheets that need to be used to provide additional mechanical support, heat dissipation or other functions, special equipment and processes are required to remove the covering aluminum sheets after drilling is completed.

[0004] The Chinese patent with the authorization announcement number CN117082742B discloses a printed circuit board drilling device, which includes a device base, a drilling device and a loading fixture. The drilling device includes a drill bit and a displacement module for driving the drill bit to move. The drill bit is provided with a drill nozzle, which is used to drill holes for the printed circuit board.

[0005] When drilling holes in PCB boards, the aluminum sheets consumed for drilling are usually relatively large. When the drilling area is not too large, it will cause waste of aluminum sheets. At the same time, laying and removing aluminum sheets takes a lot of time, which greatly reduces the efficiency of drilling processing. At the same time, it also wastes a lot of aluminum sheets and increases production costs. Summary of the invention

[0006] The purpose of the present invention is to provide a drilling device for printed circuit boards, aiming to solve the problem in the prior art that the aluminum sheets consumed for drilling are usually relatively large, and the laying and removal of the aluminum sheets takes a long time, which greatly reduces the efficiency of the drilling process.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a drilling device for a printed circuit board, comprising a mounting plate, a drilling mechanism, and a lifting assembly for driving the drilling mechanism to move vertically back and forth, and also comprising a first assembly for winding up an aluminum strip and a second assembly for releasing the aluminum strip, the mounting plate comprising a guide groove located at the front side of the mounting plate and mounting grooves symmetrically distributed on both sides of the guide groove, and the drilling mechanism is installed in the guide groove.

[0008] The drilling mechanism includes a pressing piece, a drill, a presser foot and a guide piece. There are two guide pieces symmetrically arranged on both sides of the guide slide. The pressing piece, the drill and the presser foot are sequentially sleeved on the guide piece from top to bottom. Elastic pieces sleeved on the guide piece are provided between the pressing piece and the drill, and between the drill and the presser foot.

[0009] The first component and the second component both include a base plate, a pressure plate, a rotating shaft and an aluminum belt pulley. The rotating shaft is rotatably installed in the installation groove. The base plate and the pressure plate are detachably installed on the rotating shaft. The aluminum belt pulley is pressed onto the base plate by the pressure plate and the three are coaxial. The aluminum belt passes through the bottom of the presser foot, and its two ends are respectively wrapped around two aluminum belt pulleys.

[0010] The effect is that when drilling, the lifting assembly drives the drilling mechanism to rise and fall. As the drilling mechanism rises and falls, the device can successively complete the feeding and laying of the aluminum strip and the disassembly and reeling of the aluminum strip during the process of the drilling mechanism descending to drill and rising to reset, thereby reducing the consumption of aluminum materials and the time spent on laying and disassembling aluminum materials.

[0011] The presser foot includes a drilling cavity, a chip removal hole and a positioning hole. The drilling cavity is located in the middle of the upper surface of the presser foot, the positioning hole is located in the middle of the lower surface of the drilling cavity, the chip removal hole is located on the rear wall of the drilling cavity, and a negative pressure air hole connected to the chip removal hole is opened on the rear surface of the mounting plate.

[0012] The effect is that the generated debris can be sucked away in time to prevent the debris from blocking the positioning hole and affecting the processing quality. At the same time, it can also reduce the temperature of the drill bit to prevent the drill bit from being too hot after continuous drilling, which will affect its service life.

[0013] The presser foot also includes a connecting part and a connecting hole. The connecting part is fixedly installed at both ends of the upper surface of the presser foot. The connecting hole is opened on the upper surface of the connecting part. The lower end of the guide piece extends into the connecting part and is slidably connected therewith.

[0014] A vertically arranged limiting groove is provided at the lower end of the side wall of the guide member, and a connecting column is fixedly installed at the lower part of the side wall of the connecting hole. The connecting column is located in the limiting groove and slides vertically up and down along the limiting groove.

[0015] The effect is that it is convenient to connect the presser foot with the guide member, so that the lifting and lowering of the presser foot is more stable.

[0016] The presser foot also includes an aluminum strip slide groove, the middle part of the bottom end of the presser foot is a plane, and the two sides of the bottom are inclined surfaces. The aluminum strip slide groove is opened on the two side walls of the presser foot and extends along the inclined surfaces to the bottom plane of the presser foot, which is used to limit and guide the aluminum strip passing through the bottom of the presser foot. A chip removal groove is opened on the top of the aluminum strip slide groove, and the top of the chip removal groove is connected to the negative pressure air hole.

[0017] The effect is that it can prevent debris from contaminating the surface of the undrilled aluminum strip, and at the same time reduce the temperature of the aluminum strip and the drill bit, keeping the temperature of the PCB board stable.

[0018] A connecting groove is provided between the installation groove and the bottom of the side wall of the guide slide groove. Two supporting rollers symmetrically arranged up and down are rotatably installed between the front wall and the rear wall of the connecting groove. The aluminum strip passes through between the two supporting rollers.

[0019] The lifting assembly includes a lifting slider, a downward pressure driving member, a limit member and a transmission member. The limit members are fixedly installed at both ends of the upper surface of the mounting plate. The lifting slider is located above the mounting plate, and its two ends are respectively slidably sleeved on the limit members. The downward pressure driving member is located above the lifting slider and is used to drive the lifting slider to lift and lower. The transmission member is detachably installed in the middle of the lifting slider, and the lower end of the transmission member slides through the mounting plate, extends into the guide slot and is fixedly connected to the upper surface of the downward pressure member.

[0020] The effect is that the aluminum strip can be supported to prevent the aluminum strip from being damaged when it is raised and lowered with the presser foot, and at the same time a certain tensioning effect is initiated on the aluminum strip when drilling.

[0021] Compared with the prior art, the present invention has the following beneficial effects: The device enables the feeding and laying of the aluminum strip and the disassembly and reeling of the aluminum strip to be completed in sequence while the drilling mechanism descends to drill and ascends to reset. This reduces the consumption of aluminum materials and the time spent on laying and disassembling aluminum materials. It also prevents debris from contaminating the surface of the undrilled aluminum strip and reduces the temperature of the aluminum strip and the drill bit to keep the temperature of the PCB board stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of the drilling device in the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the drilling device in the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the tool mounting plate in the present invention; Figure 4 It is a schematic diagram of the installation structure of the drilling mechanism in the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the pressure piece in the present invention; Figure 6 It is a structural schematic diagram of the aluminum strip unwinding assembly in the present invention; Figure 7 for Figure 5 A schematic diagram of the enlarged structure at A in the middle; Figure 8 for Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0023] In the figure: 1. mounting plate; 11. mounting groove; 12. guide slide groove; 13. connecting groove; 14. negative pressure air hole; 15. support roller; 2. drilling mechanism; 21. pressing member; 22. drilling machine; 23. presser foot; 231. connecting part; 232. connecting hole; 233. connecting column; 234. drilling machine cavity; 235. chip removal hole; 236. positioning hole; 238. aluminum belt slide groove; 239. chip removal groove; 24. guide member; 241. limit groove; 25. elastic member; 3. lifting assembly; 31. lifting slider; 32. pressing drive member; 33. limit member; 34. transmission member; 41. base plate; 42. pressure plate; 43. rotating shaft; 44. aluminum belt pulley. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 7 The present invention provides the following technical solutions: a drilling device for a printed circuit board, comprising a mounting plate 1, a drilling mechanism 2, a lifting component 3, a first component for winding an aluminum strip, and a second component for releasing the aluminum strip, the mounting plate 1 comprising two mounting grooves 11 and a guide slide 12, the guide slide 12 is located in the middle of the front side of the mounting plate 1, and the two mounting grooves 11 are symmetrically distributed on the left and right sides of the guide slide 12, the drilling mechanism 2 is installed in the guide slide 12, and is used to drill holes in the PCB board, the first component and the second component are respectively installed in the two mounting grooves 11, one of which is used to wind up the aluminum strip, and the other is used to release the aluminum strip, the lifting component 3 is located above the mounting plate 1, and is used to drive the drilling mechanism 2 to descend, and assist the first component and the second component to wind up and release the aluminum strip.

[0026] refer to Figure 2 , Figure 4 and Figure 6As shown, the drilling mechanism 2 includes a pressing member 21, a drill 22, a presser foot 23, two guide members 24 and an elastic member 25. The two guide members 24 are fixedly installed on both sides of the top of the guide slide 12. The pressing member 21, the drill 22 and the presser foot 23 are slidably installed in the guide slide 12 from top to bottom in sequence and are sleeved on the two guide members 24. The elastic member 25 is located between the pressing member 21 and the drill 22 and between the drill 22 and the presser foot 23, and is sleeved on the outer wall of the guide member 24.

[0027] The first component and the second component both include a base plate 41, a pressure plate 42, a rotating shaft 43, and an aluminum belt pulley 44. The rotating shaft 43 is rotatably mounted in the middle of the rear wall of the mounting groove 11. The base plate 41 and the pressure plate 42 are rotatably mounted on the rotating shaft 43, wherein the aluminum belt pulley 44 is pressed against the base plate 41 by the pressure plate 42. The aluminum belt pulley 44 is concentrically arranged with the base plate 41 and the pressure plate 42. After the aluminum belt passes through the bottom of the presser foot 23, its two ends are respectively wound around the two aluminum belt pulleys 44. The first component is driven to rotate by a motor, and the rotating shaft 43 of the first component is mounted in the middle of the rear wall of the mounting groove 11 through a one-way bearing.

[0028] When drilling, the lifting assembly 3 drives the drilling mechanism 2 to move up and down. As the drilling mechanism 2 moves up and down, the feeding and winding of the aluminum strip during drilling can be completed through the cooperation of the presser foot 23 and the first assembly and the second assembly.

[0029] refer to Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, the presser foot 23 includes a connecting portion 231, a connecting hole 232, a connecting column 233, a drilling cavity 234, a chip removal hole 235, a positioning hole 236, an aluminum strip slide 238 and a chip removal groove 239. The drilling cavity 234 is located in the middle of the upper surface of the presser foot 23, and the positioning hole 236 is located in the middle of the lower surface of the drilling cavity 234. After the drilling mechanism 2 is lowered, the drill bit of the drilling rig 22 can smoothly pass through the presser foot 23 to drill. The chip removal hole 235 is located on the rear wall of the drilling cavity 234, and the rear surface of the mounting plate 1 is provided with a negative pressure air hole 14 connected to the chip removal hole 235, which is used to suck out the waste chips generated by drilling.

[0030] The connecting part 231 is located at both ends of the upper surface of the presser foot 23, the connecting hole 232 is opened in the middle of the upper surface of the connecting part 231, the lower end of the guide member 24 extends into the connecting part 231 and is slidably connected thereto, a limiting groove 241 is opened at the lower end of the side wall of the guide member 24, the connecting column 233 is installed at the lower part of the side wall of the connecting hole 232, and passes through the limiting groove 241 and is slidably connected thereto along the up and down directions.

[0031] The middle part of the bottom end of the presser foot 23 is a plane, and the two sides of the bottom are inclined surfaces. The aluminum strip slide 238 is opened on the two side walls of the presser foot 23 and extends along the inclined surface to the bottom plane of the presser foot 23, which is used for the aluminum strip to pass through the presser foot 23 and limit and guide the aluminum strip. The chip removal groove 239 is located on the upper wall of the aluminum strip slide 238 and is connected to the drilling rig cavity 234, which is used to suck out the waste chips remaining on the aluminum strip. A connecting groove 13 is opened between the bottom of the side wall of the mounting groove 11 and the guide slide 12, and two support rollers 15 symmetrically arranged up and down are rotatably installed between the front wall and the rear wall of the connecting groove 13, and the aluminum strip passes between the two support rollers 15.

[0032] refer to Figure 1 and Figure 2 As shown, the lifting assembly 3 includes a lifting slider 31, a downward pressure driving member 32, a limit member 33 and a transmission member 34. The limit members 33 are installed at both ends of the upper surface of the mounting plate 1. The lifting slider 31 is located above the mounting plate 1, and is sleeved on the limit member 33 and is slidably connected with it up and down. The downward pressure driving member 32 is located above the lifting slider 31 and is used to drive the lifting slider 31 to move up and down. It is preferably an electric telescopic rod. The transmission member 34 is installed in the middle of the lower surface of the lifting slider 31, and penetrates the mounting plate 1 and extends into the guide slot 12, and is fixedly connected to the upper surface of the downward pressure member 21, wherein the transmission member 34 is slidably connected to the lifting slider 31.

[0033] The implementation principle of the embodiment of the present invention is as follows: when drilling, the lifting component 3 drives the drilling mechanism 2 to descend. Since the aluminum strip passes through the aluminum strip slide groove 238 of the presser foot 23, as the drilling mechanism 2 descends, the presser foot 23 drives the aluminum strip to descend. Since the first component can only rotate in one direction, the second component rotates. As the presser foot 23 descends, the aluminum strip on its aluminum belt wheel 44 is released for a period of time and then pressed against the PCB board by the presser foot 23. At this time, as the aluminum strip is pressed, the aluminum belt pulley 44 of the first component is subjected to a greater aluminum belt pulling force than the friction force provided by the pressure plate 42, so that the aluminum belt wheel 44 cannot rotate with the pressure plate 42 to reel in the aluminum strip. The drilling mechanism 2 continues to descend. At this time, the drilling machine 22 starts to descend and drills the aluminum strip and the PCB board. After the drilling is completed, the lifting component 3 drives the drilling mechanism 2 to The drill rig 22 rises first with the pressing member 21 under the action of the elastic member 25, and the presser foot 23 rises accordingly after the elastic force of the elastic member 25 is released. As the presser foot 23 rises, the pressure exerted on the aluminum strip disappears. At this time, the aluminum strip pulling force exerted on the aluminum strip by the aluminum strip pulley 44 of the first component is less than the friction force provided by the pressure plate 42. The aluminum strip pulley 44 of the first component rotates under the friction force of the pressure plate 42 to reel in the aluminum strip released by the second component, so that the feeding and reeling of the aluminum strip during drilling can be completed through the lifting and lowering of the presser foot 23 and the cooperation between the first component and the second component, so that the device can sequentially complete the feeding and laying of the aluminum strip and the disassembly and reeling of the aluminum strip during the process of the drilling mechanism 2 descending to drill and rising to reset, thereby reducing the time consumed in laying and disassembling the aluminum strip while reducing the consumption of aluminum material.

[0034] At the same time, most of the waste chips generated by drilling enter the drill cavity 234 along with the drill bit, and are discharged and recycled through the chip removal holes 235 and the negative pressure air holes 14. At the same time, a small amount of waste chips that fall on the aluminum strip are sucked out through the chip removal holes 235, the drill cavity 234 and the chip removal groove 239 by the negative pressure of the negative pressure air holes 14 when passing through the aluminum strip slide 238, thereby preventing the debris from contaminating the surface of the undrilled aluminum strip and at the same time reducing the temperature of the aluminum strip and the drill bit to keep the temperature of the PCB board stable.

[0035] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A drilling device for a printed circuit board, comprising a mounting plate (1), a drilling mechanism (2), and a lifting assembly (3) for driving the drilling mechanism (2) to move vertically back and forth, characterized in that: It also includes a first component for winding the aluminum strip and a second component for releasing the aluminum strip, the mounting plate (1) includes a guide slot (12) located at the front side of the mounting plate (1) and mounting slots (11) symmetrically distributed on both sides of the guide slot (12), and the drilling mechanism (2) is located in the guide slot (12); The drilling mechanism (2) comprises a lower pressing member (21), a drilling machine (22), a presser foot (23) and a guide member (24). The guide members (24) are provided in two pieces and are symmetrically arranged on both sides of the guide slide groove (12). The lower pressing member (21), the drilling machine (22) and the presser foot (23) are sleeved on the guide member (24) in sequence from top to bottom. An elastic member (25) sleeved on the guide member (24) is provided between the lower pressing member (21) and the drilling machine (22) and between the drilling machine (22) and the presser foot (23). The first component and the second component both comprise a base plate (41), a pressure plate (42), a rotating shaft (43) and an aluminum belt pulley (44); the rotating shaft (43) is rotatably mounted in the mounting groove (11); the base plate (41) and the pressure plate (42) are detachably mounted on the rotating shaft (43); the aluminum belt pulley (44) is pressed against the base plate (41) by the pressure plate (42) and the three are coaxial; the aluminum belt passes through the bottom of the pressure foot (23) and the two ends are respectively wound around the two aluminum belt pulleys (44).

2. A drilling device for a printed circuit board according to claim 1, characterized in that: The presser foot (23) comprises a drilling cavity (234), a chip removal hole (235) and a positioning hole (236); the drilling cavity (234) is located at the middle of the top end of the presser foot (23); the positioning hole (236) is located at the middle of the bottom end of the drilling cavity (234); the chip removal hole (235) is located at the rear wall of the drilling cavity (234); and a negative pressure air hole (14) communicating with the chip removal hole (235) is provided on the rear surface of the mounting plate (1).

3. A drilling device for a printed circuit board according to claim 2, characterized in that: The presser foot (23) further comprises a connecting portion (231) and a connecting hole (232); the connecting portion (231) is fixedly mounted at two ends of the upper surface of the presser foot (23); the connecting hole (232) is opened at the top of the connecting portion (231); and the lower end of the guide member (24) extends into the connecting portion (231) and is slidably connected thereto.

4. A drilling device for a printed circuit board according to claim 3, characterized in that: A vertically arranged limiting groove (241) is provided at the lower end of the side wall of the guide member (24), and a connecting column (233) is fixedly installed at the lower part of the side wall of the connecting hole (232). The connecting column (233) is located in the limiting groove (241) and slides vertically up and down along the limiting groove (241).

5. A drilling device for a printed circuit board according to claim 2, characterized in that: The presser foot (23) further comprises an aluminum strip slide groove (238); the middle portion of the bottom end of the presser foot (23) is a plane, and both sides of the bottom end are inclined surfaces arranged in an inclined manner; the aluminum strip slide groove (238) is provided on both side walls of the presser foot (23) and extends along the inclined surfaces to the bottom plane of the presser foot (23), and is used for limiting and guiding the aluminum strip passing through the bottom of the presser foot (23).

6. A drilling device for a printed circuit board according to claim 5, characterized in that: A chip removal groove (239) is provided at the top of the aluminum strip slide groove (238), and the top of the chip removal groove (239) is connected to the negative pressure air hole (14).

7. A drilling device for a printed circuit board according to claim 1, characterized in that: A connecting groove (13) is provided between the bottom of the side walls of the installation groove (11) and the guide slide groove (12), and two support rollers (15) symmetrically arranged up and down are rotatably mounted between the front wall and the rear wall of the connecting groove (13), and the aluminum strip passes between the two support rollers (15).

8. A drilling device for a printed circuit board according to claim 1, characterized in that: The lifting assembly (3) comprises a lifting slider (31), a downward pressing driving member (32), a limiting member (33) and a transmission member (34). The limiting member (33) is fixedly mounted on the two ends of the top of the mounting plate (1). The lifting slider (31) is located above the mounting plate (1), and its two ends are respectively slidably sleeved on the limiting member (33). The downward pressing driving member (32) is located above the lifting slider (31) and is used to drive the lifting slider (31) to move up and down. The transmission member (34) is detachably mounted on the middle part of the lifting slider (31). The lower end of the transmission member (34) slides through the mounting plate (1), extends into the guide slot (12) and is fixedly connected to the top of the downward pressing member (21).

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