Laser drilling machine to prevent drill bit breakage for circuit board processing

Abstract

The present invention discloses a laser drilling machine for preventing drill bit breakage for processing circuit boards, comprising a machine body and a laser drill bit, a support frame is provided in the inner cavity of the machine body, a movable platform is provided at the upper end of the support frame, a clamping assembly for fixing the circuit board is provided at the upper end of the movable platform, a cantilever is provided at the rear side of the inner cavity of the machine body, a cooling sleeve for installing the laser drill bit is provided at the front end of the cantilever, a telescopic frame is provided at the lower side of the cantilever, a slag collecting sleeve for collecting slag is provided at the extended end of the telescopic frame, and the lower surface of the slag collecting sleeve is fitted with the upper surface of the circuit board to be processed, a crossbeam opposite to the cantilever is provided in the machine body, a dredging mechanism opposite to the laser drill bit is provided on the upper side of the crossbeam, an air pump is provided on one side of the machine body, and the air pump sucks the inner cavity of the cooling sleeve and the slag collecting sleeve. The present invention can cool down the laser rotary head and the circuit board, and can collect the slag that is splashed and then condensed by the melted material during the drilling process.

Description

Technical Field

[0001] The invention relates to the technical field of laser drilling machines, in particular to a laser drilling machine for preventing drill bit breakage for processing circuit boards. Background Art

[0002] Circuit board PCB is the abbreviation of printed circuit board. Usually, the conductive pattern made of printed circuits, printed components or a combination of the two on the insulating material according to the predetermined design is called a printed circuit. The conductive pattern that provides electrical connection between components on the insulating substrate is called a printed circuit. In this way, the finished board of printed circuits or printed circuits is called a printed circuit board, also known as a printed board or printed circuit board. With the rapid development of microelectronics technology, the widespread application of large-scale and ultra-large-scale integrated circuits, and the advancement of micro-assembly technology, the manufacturing of printed circuit boards has developed in the direction of lamination and multi-function, making the conductors of printed circuit patterns thin, micro-holes and narrow spacing. The mechanical drilling process technology used in processing can no longer meet the requirements, and the rapidly developed laser drilling machine has emerged.

[0003] Chinese invention patent CN112872630A discloses a laser automatic micro-hole drilling machine with a spray device, including a housing, a base, a support plate, a telescopic cylinder, a laser drill, a clamping device and a control panel; the housing is installed above the base, the clamping device is installed in the center of the base, the support plate is installed on one side above the base, and the telescopic cylinder is installed on one end above the support plate; the laser drill is installed below the telescopic cylinder, and the laser drill is directly opposite to the top of the clamping device; a coolant circulation device is arranged in the base, and the coolant circulation device includes a water pump and a circulating water tank; the circulating water tank is installed below the base, the water pump is installed on one side of the circulating water tank, and spray pipes are installed on both sides of the water pump, and the other end of the spray pipe is connected to the inside of the housing. However, water is attached to the surface of the PCB board after drilling, so that the PCB board needs to be dried, which increases the production process of the PCB board and reduces the production efficiency of the PCB board. At the same time, the melted material will splash during the drilling process, and finally condense and discharge at the upper edge of the hole, thereby affecting the quality of the drilling. Summary of the invention

[0004] The object of the present invention is to provide a laser drilling machine for circuit board processing that can prevent drill bit breakage, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser drilling machine for preventing drill bit breakage for processing circuit boards, comprising a machine body and a laser drill bit, the inner cavity of the machine body is provided with a support frame, the upper end of the support frame is provided with a movable platform, the upper part of the movable platform is provided with a clamping assembly for fixing the circuit board, a cantilever is provided at the rear side of the inner cavity of the machine body, a cooling sleeve for installing the laser drill bit is provided at the front end of the cantilever, a telescopic frame is installed at the lower side of the cantilever, a slag collecting sleeve for collecting slag is provided at the protruding end of the telescopic frame, and the lower surface of the slag collecting sleeve is in contact with the upper surface of the circuit board to be processed, a crossbeam opposite to the cantilever is provided in the machine body, a dredging mechanism opposite to the laser drill bit is provided on the upper side of the crossbeam, and an air pump is provided on one side of the machine body, and the air pump sucks the inner cavity of the cooling sleeve and the slag collecting sleeve.

[0006] The transmission shaft is provided with a gear, and a guide sleeve is provided on one side of the mounting bracket, and a push rod is inserted in the guide sleeve, and the lower end of the push rod passes through the slag collecting sleeve, and a rack matching the gear is provided on the upper end of the push rod.

[0007] Preferably, a first mounting groove is formed at the lower end of the push rod, a ball is arranged in the first mounting groove, and a fixing sleeve is sleeved on the outer side of the lower end of the ball.

[0008] Preferably, the slag collecting sleeve comprises a connecting arm, an enclosure cover, an annular heat conductive sheet, a material blocking leak plate, a material receiving box, an air duct and heat dissipation fins. The protruding end of the telescopic frame is provided with a connecting arm, and the lower end of the connecting arm is connected to the enclosure cover, and material guiding grooves are symmetrically opened on the outer side of the enclosure cover, and a material receiving box opposite to the material guiding groove is provided on the outer side of the enclosure cover, an air duct is provided between the two material receiving boxes and the cooling sleeve, and a material blocking leak plate is provided at the air inlet of the air duct, and an annular heat conductive sheet that is in contact with the upper surface of the circuit board to be processed is movably provided on the lower end of the enclosure cover, and heat dissipation fins are evenly provided on the upper surface of the annular heat conductive sheet.

[0009] Preferably, the dredging mechanism comprises a driving rod, a lifting screw rod, a cover plate, a dredging grinding rod, a driving motor, a return spring, a transmission sleeve, an active bevel gear, a driven bevel gear, an adjusting nut, a C-shaped clamping plate and a switching rod, the upper side of the cross beam is provided with a second mounting groove, the driving rod is rotatably arranged in the second mounting groove, the upper end of the driving rod is slidably sleeved with a lifting screw rod, the upper end of the lifting screw rod is sleeved with a cover plate fixedly connected to the cross beam, and the upper end of the lifting screw rod is provided with a dredging grinding rod, the lower side of the cross beam is provided with a driving motor, the outer side of the main shaft of the driving motor is sleeved with a return spring and a transmission sleeve in sequence, the outer sides of both ends of the transmission sleeve are sleeved with active bevel gears, the lower end of the driving rod passes through the cross beam and is sleeved with a driven bevel gear matching the active bevel gear, the outer side of the lifting screw rod is sleeved with an adjusting nut, the outer side of the adjusting nut is movably provided with a C-shaped clamping plate, and the lower side of the C-shaped clamping plate is provided with a switching rod for switching two active bevel gears.

[0010] Compared with the prior art, the present invention provides a laser drilling machine for preventing drill bit breakage for circuit board processing, which has the following beneficial effects: the present invention accelerates the fluidity of the gas in the cooling sleeve and the slag collecting sleeve through the vacuum pump, so that the laser rotor and the circuit board can be cooled down, and at the same time, the slag collecting sleeve collects the slag that is splashed and then condensed by the melted material during the drilling process, thereby avoiding the influence of the slag sticking to the upper edge of the hole on the drilling quality, and the unblocking mechanism grinds and unblocks the through hole after it is opened, thereby avoiding the influence of the slag sticking to the inner wall of the through hole on the drilling quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front cross-sectional view of the present invention;

[0012] Figure 2 It is a right side cross-sectional structural schematic diagram of the present invention;

[0013] Figure 3 for Figure 1 Schematic diagram of the cross-section structure at point A in the middle;

[0014] Figure 4 for Figure 1 Schematic diagram of the cross-section structure at point B;

[0015] Figure 5 for Figure 1 The enlarged structural diagram of the middle C part;

[0016] Figure 6 for Figure 1 The enlarged structural diagram of the middle D part;

[0017] Figure 7 for Figure 1 The enlarged structural diagram of part E in the middle;

[0018] Figure 8 for Figure 2 The enlarged structural diagram of part F in the middle.

[0019] In the figure: 1, machine body; 2, laser drill; 3, support frame; 4, movable platform; 5, clamping assembly; 6, cantilever; 7, dredging mechanism; 70, driving rod; 71, lifting screw rod; 72, cover plate; 73, dredging grinding rod; 74, driving motor; 75, reset spring; 76, transmission sleeve; 77, active bevel gear; 78, driven bevel gear; 79, adjusting nut; 710, C-type card plate; 711, switching rod; 8, telescopic frame; 80, mounting frame; 81. Drive screw; 82. Worm gear; 83. Extension rod; 84. Limit plate; 85. Worm; 86. Transmission shaft; 87. Gear; 88. Rack; 89. Push rod; 810. Guide sleeve; 9. Slag collecting sleeve; 90. Connecting arm; 91. Enclosure cover; 92. Annular heat conducting sheet; 93. Material blocking plate; 94. Material collecting box; 95. Air guide pipe; 96. Heat dissipating fin; 10. Crossbeam; 11. Cooling sleeve; 12. Vacuum pump; 13. Ball; 14. Fixed sleeve. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-8The present invention provides an embodiment of a laser drilling machine for preventing drill bit breakage for processing circuit boards: The laser drilling machine for preventing drill bit breakage for processing circuit boards comprises a machine body 1 and a laser drill bit 2. The inner cavity of the machine body 1 is provided with a support frame 3, and the upper end of the support frame 3 is provided with a movable platform 4. The upper part of the movable platform 4 is provided with a clamping assembly 5 for fixing the circuit board. The rear side of the inner cavity of the machine body 1 is provided with a cantilever 6, and the front end of the cantilever 6 is provided with a cooling sleeve 11 for installing the laser drill bit 2. The laser drill bit 2 is cooled by the cooling sleeve 11, and the cooling sleeve 11 is used to cool the laser drill bit 2. A mounting frame 80 is installed on the lower side of the arm 6, and a slide groove is symmetrically opened at the lower end of the mounting frame 80. A driving screw 81 is rotatably arranged in the slide groove. A worm gear 82 is sleeved on the upper outer side of the driving screw 81. An extension rod 83 matching the slide groove is threadedly connected to the lower outer side of the driving screw 81. A limit plate 84 fixedly connected to the mounting frame 80 is sleeved on the lower end of the extension rod 83. A slag collecting sleeve 9 is arranged at the lower ends of the two extension rods 83. A worm 85 matching the worm gear 82 is rotatably arranged in the slide groove. A transmission shaft 85 is arranged between the two worms 85. The driving shaft 86 is provided with a gear 87 on one end of the transmission shaft 86. A guide sleeve 810 is provided on one side of the mounting frame 80. A push rod 89 is inserted into the guide sleeve 810. The lower end of the push rod 89 passes through the slag collecting sleeve 9, and the upper end of the push rod 89 is provided with a rack 88 matched with the gear 87. The push rod 89 drives the rack 88 to move up and down, and the gear 87 drives the transmission shaft 86 to rotate through the meshing transmission between the rack 88 and the gear 87, so that the two worms 85 move synchronously, and then the meshing transmission between the worm 85 and the worm wheel 82 The transmission enables the worm gear 82 to drive the driving screw 81 to rotate synchronously, so that the extension rod 83 can slide along the mounting frame 80, so that the lower surface of the slag collecting sleeve 9 can fit with the upper surface of the circuit board to be processed, and at the same time, a first mounting groove is opened at the lower end of the push rod 89, and a ball 13 is arranged in the first mounting groove. A fixing sleeve 14 is sleeved on the outer side of the lower end of the ball 13. The ball 13 is used to reduce the resistance between the lower end of the push rod 89 and the circuit board, so that the circuit board will not be hindered by the push rod 89 when moving to the next workstation.

[0022] A slag collecting sleeve 9 for collecting slag is provided at the extended end of the telescopic frame 8, and the lower surface of the slag collecting sleeve 9 is in contact with the upper surface of the circuit board to be processed, so that the slag collecting sleeve 9 can collect the splashing slag melted during the drilling process, and a second mounting groove is provided on the upper side of the crossbeam 10, and a driving rod 70 is rotatably provided in the second mounting groove, and a lifting screw rod 71 is slidably sleeved on the upper end of the driving rod 70, and a cover plate 72 fixedly connected to the crossbeam 10 is sleeved on the outer side of the upper end of the lifting screw rod 71, and a The grinding rod 73 is unblocked, and a driving motor 74 is arranged on the lower side of the cross beam 10. The outer side of the main shaft of the driving motor 74 is sleeved with a return spring 75 and a transmission sleeve 76 in sequence. The outer sides of the transmission sleeve 76 are sleeved with active bevel gears 77. The lower end of the driving rod 70 passes through the cross beam 10 and is sleeved with a driven bevel gear 78 matching the active bevel gear 77. The outer side of the lifting screw rod 71 is sleeved with an adjusting nut 79. The outer side of the adjusting nut 79 is movably provided with a C-type card plate 710. The lower side of the C-type card plate 710 is provided with a useful switch. The switching rod 711 of the two active bevel gears 77 drives the transmission sleeve 76 to rotate through the driving motor 74, and the driven bevel gear 78 drives the driving rod 70 to rotate through the meshing transmission between the active bevel gear 77 and the driven bevel gear 78, so that the lifting screw rod 71 can rotate synchronously, and then the inner wall of the hole opened by the dredging grinding rod 73 can be rotated and polished, so as to prevent the melted material from sticking to the hole wall. At the same time, the adjusting nut 79 rises together with the lifting screw rod 71, so that C The clamping plate 710 drives the switching rod 711 to rise, and finally the switching rod 711 pushes the active bevel gear 77 at the other end to mesh with the driven bevel gear 78, so that the driving rod 70 rotates in the opposite direction, thereby moving the dredging grinding rod 73 out of the hole, and an air pump 12 is arranged on one side of the machine body 1, and the air pump 12 sucks the inner cavity of the cooling jacket 11 and the slag collecting jacket 9, and accelerates the fluidity of the gas in the cooling jacket 11 and the slag collecting jacket 9 through the air pump 12, so that the temperature of the laser drill 2 and the processed circuit board can be quickly reduced.

[0023] In this implementation, if Figure 2 , Figure 4 and Figure 8As shown, the slag collecting sleeve 9 includes a connecting arm 90, a baffle cover 91, an annular heat conducting sheet 92, a material blocking leaking plate 93, a material collecting box 94, an air guide pipe 95 and a heat dissipation fin 96. The extending end of the telescopic frame 8 is provided with a connecting arm 90, and the lower end of the connecting arm 90 is connected to the baffle cover 91. The outer side of the baffle cover 91 is symmetrically provided with material guiding grooves, and the outer side of the baffle cover 91 is provided with a material collecting box 94 opposite to the material guiding groove. An air guide pipe 95 is provided between the two material collecting boxes 94 and the cooling sleeve 11, and a material blocking leaking plate 93 is provided at the air inlet of the air guide pipe 95. The lower end of 91 is movably provided with an annular heat conductive sheet 92 that fits with the upper surface of the circuit board to be processed, and the upper surface of the annular heat conductive sheet 92 is evenly provided with heat dissipation fins 96. The high temperature of the circuit board is absorbed and transferred by the annular heat conductive sheet 92, and the temperature on the annular heat conductive sheet 92 is quickly dissipated to the air in the enclosure cover 91 through the heat dissipation fins 96, and the high-temperature gas in the enclosure cover 91 is discharged through the vacuum pump 12. At the same time, the annular heat conductive sheet 92 is installed by adopting a movable connection method, so that the size of the hole to be punched can be changed.

[0024] Working principle: During operation, the top rod 89 is used to drive the rack 88 to move up and down, and the meshing transmission between the rack 88 and the gear 87 makes the gear 87 drive the transmission shaft 86 to rotate, so that the two worms 85 move synchronously, and then the meshing transmission between the worm 85 and the worm wheel 82 makes the worm wheel 82 drive the driving screw 81 to rotate synchronously, so that the extension rod 83 can slide along the mounting frame 80, and finally the lower surface of the annular heat conductive sheet 92 can fit with the upper surface of the circuit board to be processed, so that the annular heat conductive sheet 92 absorbs and transfers the high temperature of the circuit board, and the temperature on the annular heat conductive sheet 92 is quickly dissipated to the air in the enclosure cover 91 through the heat dissipation fins 96, and the air pump 12 is used to accelerate the fluidity of the gas in the cooling sleeve 11 and the slag collection sleeve 9, so that the laser drill 2 and the processed circuit board The temperature can be quickly reduced, and at the same time, the slag splashed on the annular heat conductive sheet 92 is sucked into the material receiving box 94. When the circuit board is opened, the reset spring 75 is used to push the active bevel gear 77 on one side to engage with the driven bevel gear 78, so that the driven bevel gear 78 drives the rotation of the drive rod 70, so that the lifting screw 71 can rotate synchronously, and then the inner wall of the hole opened by the dredging grinding rod 73 can be rotated and polished, so as to prevent the melted material from sticking to the hole wall. At the same time, the adjusting nut 79 rises together with the lifting screw 71, so that the C-type card plate 710 drives the switching rod 711 to rise, and finally the switching rod 711 pushes the active bevel gear 77 at the other end to engage with the driven bevel gear 78, so that the drive rod 70 rotates in the opposite direction, so that the dredging grinding rod 73 is moved out of the hole.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0026] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A laser drilling machine for preventing drill bit breakage for circuit board processing, comprising a machine body (1) and a laser drill bit (2), characterized in that: The inner cavity of the machine body (1) is provided with a support frame (3), the upper end of the support frame (3) is provided with a movable platform (4), the upper part of the movable platform (4) is provided with a clamping assembly (5) for fixing the circuit board, the rear side of the inner cavity of the machine body (1) is provided with a cantilever (6), the front end of the cantilever (6) is provided with a cooling jacket (11) for installing a laser drill bit (2), the lower side of the cantilever (6) is provided with a telescopic frame (8), the telescopic frame (8) is provided with a A slag collecting sleeve (9) for collecting slag is provided at the protruding end, and the lower surface of the slag collecting sleeve (9) is in contact with the upper surface of the circuit board to be processed; a crossbeam (10) opposite to the cantilever (6) is provided in the machine body (1); a dredging mechanism (7) opposite to the laser drill bit (2) is provided on the upper side of the crossbeam (10); an air pump (12) is provided on one side of the machine body (1), and the air pump (12) sucks the inner cavities of the cooling sleeve (11) and the slag collecting sleeve (9); The telescopic frame (8) comprises a mounting frame (80), a driving screw (81), a worm gear (82), an extension rod (83), a limit plate (84), a worm (85), a transmission shaft (86), a gear (87), a rack (88), a push rod (89) and a guide sleeve (810). The mounting frame (80) is mounted on the lower side of the cantilever (6). A slide groove is symmetrically provided at the lower end of the mounting frame (80). A driving screw (81) is rotatably provided in the slide groove. The upper outer side of the driving screw (81) is sleeved with a worm gear (82). The driving screw The lower outer side of (81) is threadedly connected to an extension rod (83) matching the chute, and the lower outer side of the extension rod (83) is provided with a limit plate (84) fixedly connected to the mounting frame (80), and the slag collecting sleeve (9) is provided at the lower ends of the two extension rods (83), and a worm (85) matching the worm wheel (82) is rotatably provided in the chute, and a transmission shaft (86) is provided between the two worms (85), and a gear (87) is provided on the outer side of one end of the transmission shaft (86), and a guide sleeve (84) is provided on one side of the mounting frame (80). 810), a push rod (89) is inserted into the guide sleeve (810), the lower end of the push rod (89) passes through the slag collection sleeve (9), and the upper end of the push rod (89) is provided with a rack (88) matched with the gear (87); the slag collection sleeve (9) includes a connecting arm (90), a baffle cover (91), an annular heat conducting plate (92), a material blocking plate (93), a material receiving box (94), an air guide pipe (95) and a heat dissipation fin (96), and the extending end of the telescopic frame (8) is provided with a connecting arm (90), and the lower end of the connecting arm (90) is connected to the baffle cover. A cover (91), wherein the outer side of the enclosure cover (91) is symmetrically provided with a material guide groove, and the outer side of the enclosure cover (91) is provided with a material receiving box (94) opposite to the material guide groove, an air guide tube (95) is provided between the two material receiving boxes (94) and the cooling jacket (11), and a material blocking plate (93) is provided at the air inlet of the air guide tube (95), and the lower end of the enclosure cover (91) is movably provided with an annular heat conducting plate (92) that is in contact with the upper surface of the circuit board to be processed, and the upper surface of the annular heat conducting plate (92) is evenly provided with heat dissipation fins (96);The dredging mechanism (7) comprises a driving rod (70), a lifting screw rod (71), a cover plate (72), a dredging grinding rod (73), a driving motor (74), a return spring (75), a transmission sleeve (76), an active bevel gear (77), a driven bevel gear (78), an adjusting nut (79), a C-shaped clamping plate (710) and a switching rod (711). A second mounting groove is provided on the upper side of the crossbeam (10), and a driving rod (70) is rotatably arranged in the second mounting groove. The upper end of the driving rod (70) is slidably sleeved with the lifting screw rod (71). The outer side of the upper end of the lifting screw rod (71) is sleeved with a cover plate (72) fixedly connected to the crossbeam (10), and the upper end of the lifting screw rod (71) is provided with a dredging grinding rod (73). The crossbeam (10) A driving motor (74) is provided on the lower side of the main shaft of the driving motor (74), and a return spring (75) and a transmission sleeve (76) are sequentially sleeved on the outer side of the main shaft of the driving motor (74). The outer sides of the two ends of the transmission sleeve (76) are sleeved with active bevel gears (77). The lower end of the driving rod (70) passes through the crossbeam (10) and is sleeved with a driven bevel gear (78) that matches the active bevel gear (77). The outer side of the lifting screw (71) is sleeved with an adjusting nut (79). The outer side of the adjusting nut (79) is movably provided with a C-shaped card (710). The lower side of the C-shaped card (710) is provided with a switching rod (711) for switching the two active bevel gears (77). The rotation of the driving rod (70) causes the lifting screw (71) to rotate synchronously.

2. The laser drilling machine for preventing drill bit breakage for circuit board processing according to claim 1, characterized in that: A first mounting groove is provided at the lower end of the push rod (89), a ball (13) is provided in the first mounting groove, and a fixing sleeve (14) is sleeved on the outer side of the lower end of the ball (13).

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