A stable through-hole device for producing printed circuit boards

Abstract

The present invention relates to the technical field of printed circuit board production, and in particular to a stable through-hole device for printed circuit board production, comprising a workbench and a box body fixed on the workbench, a box door and a swing plate rotatably connected to the box body, a three-axis moving machine is arranged inside the box body, a movable seat is fixed to the moving part of the three-axis moving machine, and a drilling machine is slidably connected to the movable seat. Under the action of a rack and a spur gear, whenever the drill bit moves downward to drill a hole in a printed circuit board, the rack and the spur gear cooperate to drive the knob to rotate to control the power of a dust pump, so that the dust pump can adaptively increase the dust suction power as the drill bit extends, and has high adaptability, so that there is no need to start the dust pump at high power all the time, thereby saving electric energy and increasing the service life of the dust pump.

Description

Technical Field

[0001] The invention relates to the technical field of printed circuit board production, and in particular to a stable through-hole device for producing printed circuit boards. Background Art

[0002] During the production process of printed circuit boards, it is necessary to drill holes on the printed circuit boards so that they have through holes. The through holes can provide electrical connections for component pins and allow soldering on both sides of the circuit board, thereby achieving electrical connections between different layers on the circuit board.

[0003] At present, most of the printed circuit boards are drilled using circuit board drilling machines. However, during the drilling process, in order to prevent the dust and debris generated during the drilling process from remaining on the printed circuit boards and affecting the printed circuit boards, thereby ensuring the cleanliness of the printed circuit boards, it is necessary to install a vacuum pump to remove the dust and debris generated during the drilling. However, if the vacuum pump is always running at maximum power, it is easy to cause the suction force to decay and it is impossible to maintain an efficient cleaning effect continuously. If the vacuum pump is adjusted to a low power, it is impossible to efficiently remove the dust and debris. The vacuum pump cannot adapt the vacuum power according to the degree of drilling, and has low adaptability, which affects the service life of the vacuum pump.

[0004] The present invention aims to solve the problems existing in the above-mentioned patents. To this end, a stable through-hole production device for printed circuit boards is proposed, which can adapt the suction power according to the degree of drilling, has high adaptability, and improves the service life of the suction pump. Summary of the invention

[0005] In order to overcome the shortcomings of the vacuum pump that it cannot adapt the vacuum power according to the degree of drilling, has low adaptability and affects the service life of the vacuum pump, the present invention provides a stable through-hole production equipment for printed circuit boards that can adapt the vacuum power according to the degree of drilling, has high adaptability and increases the service life of the vacuum pump.

[0006] The present invention is achieved through the following technical solutions:

[0007] A stable through-hole production device for printed circuit boards comprises a workbench and a box body fixed on the workbench, a box door and a swing plate are rotatably connected to the box body, a three-axis mobile machine is arranged inside the box body, a movable seat is fixed to the moving part of the three-axis mobile machine, a drilling machine is slidably connected to the movable seat, a mounting head is fixed to the shaft of the drilling machine, and the mounting head also comprises a variable pitch component, a dust suction pump, a knob, a spur gear, a rack, a dust suction component and a clamping component, a clamping component is arranged on the mounting head for clamping and fixing drill bits of different specifications, and the dust suction component is installed on the drilling machine for removing dust and debris generated by drilling. Collection, a dust pump is installed on the top of the box, the air inlet end of the dust pump is connected and communicated with the air outlet end of the annular dust suction pipe, a knob is installed on the movable seat, the knob is electrically connected to the dust pump and can control the power of the dust pump, a spur gear is fixedly connected to the outer side of the knob along the circumferential direction, and a rack meshing with the spur gear is fixedly connected to the top of the drilling machine. When the movement of the drilling machine makes the drill bit move downward, the drilling machine drives the rack to move downward, the rack drives the spur gear to rotate forward, and the spur gear drives the knob to rotate forward. The forward rotation of the knob adjusts the dust suction power of the dust suction pump, so that the dust suction power of the dust suction pump can be adaptively adjusted with the degree of drilling.

[0008] Further explanation, the variable pitch assembly includes a cylinder fixedly connected to the top of the drilling machine, contact rods fixedly connected to the inside of the cylinder at evenly spaced intervals, the distribution of the contact rods gradually tilts from right to left, a screw is vertically slidably connected to the cylinder, the pitch of the upper part of the screw is smaller, the pitch of the lower part of the screw is larger, the pitch of the screw gradually increases from top to bottom, the thread of the screw is in contact with the contact rod, a servo motor is fixedly connected to the movable seat, the output shaft end of the servo motor is fixedly connected to the end of the screw, the servo motor is used to drive the screw to reverse, the screw reversal first drives the contact rod to move downward, the contact rod drives the drilling machine to move downward through the cylinder, the drilling machine drives the drill bit to move slowly downward, and then as the pitch of the screw increases, the drill bit moves downward at high speed to complete the final drilling.

[0009] Further explanation, the dust suction assembly includes a guide seat fixedly connected to the drilling machine at even intervals, a guide rod slidably inserted into the guide seat, an annular dust suction pipe is fixedly connected between the guide rods to extract dust and debris generated by drilling, the annular dust suction pipe is connected and communicated with the air inlet end of the dust suction pump, a corrugated cover is connected between the annular dust suction pipe and the drilling machine to block debris and dust, and a compression spring sleeved on the guide rod is connected between the annular dust suction pipe and the guide seat.

[0010] Further explanation, the clamping assembly includes a fixed column fixed to the inner side of the mounting head, and a clamping block is slidably connected at even intervals at the bottom of the fixed column to clamp and fix drill bits of different specifications. A connecting spring I is connected between the clamping block and the mounting head, and a trigger assembly is provided on the mounting head to drive the clamping block to move.

[0011] As a further explanation, protrusions are evenly spaced on the clamping block to increase the friction between the clamping block and the drill bit.

[0012] Further explanation, the trigger assembly includes a driving ring that is slidably connected to the mounting head, the inner circumference of the driving ring is a conical surface, the upper outer side of the clamping block is an inclined surface, the conical surface of the driving ring contacts the inclined surface of the clamping block to drive the clamping block to move, and a supporting spring mounted on a fixed column is connected between the driving ring and the mounting head.

[0013] Further explanation, the limit assembly includes vertical rods fixed to the bottom of the workbench at even intervals, a limit plate slidably mounted on the vertical rods, the limit plate slidably passes through the top of the workbench to limit the printed circuit board, and a buffer spring is connected between the limit plate and the vertical rods.

[0014] Further explanation, the printed circuit board production stable through-hole equipment also includes a loading and unloading assembly, which includes a fixed seat fixedly connected to the top of the workbench, a placement seat fixedly connected to the top of the fixed seat for placing drill bits of different specifications, a fixed cylinder symmetrically fixed to the top of the fixed seat, a U-shaped plate fixedly connected to the top of the fixed cylinder at uniform intervals along the circumferential direction, a trigger rod slidably penetrated the inner side of the U-shaped plate, the top of the trigger rod is an inclined surface, a reset spring is connected between the trigger rod and the U-shaped plate, and a movable ring corresponding to the trigger rod is fixedly sleeved on the outer side of the mounting head to drive the trigger rod to move.

[0015] Further explanation, the equipment for producing stable through-holes in printed circuit boards also includes a fixing frame symmetrically fixed to the movable seat, the fixing frame slides through the outer side of the drilling machine, and a connecting spring II is symmetrically connected between the drilling machine and the fixing frame.

[0016] The beneficial effects of the present invention are:

[0017] 1. Under the action of the rack and spur gear, whenever the drill moves downward to drill a hole in the printed circuit board, the rack and spur gear cooperate to drive the knob to rotate to control the power of the vacuum pump, so that the vacuum pump can adaptively increase the vacuum power as the drill bit extends. It has high adaptability and does not need to start the vacuum pump at high power all the time, thereby saving electricity and increasing the service life of the vacuum pump.

[0018] 2. Start the three-axis mobile machine to drive the movable seat to move. When the movable seat drives the drill bit to move to the initial drilling position of the printed circuit board through the drilling machine, start the servo motor to reverse and drive the screw to reverse. The screw reversal drives the contact rod to move downward. The contact rod drives the drilling machine to move downward through the barrel, so that the drilling machine drives the drill bit to move downward to drill the printed circuit board. Since the pitch of the screw gradually increases from top to bottom, the screw reversal first makes the drill bit move slowly downward and then move downward at high speed to complete the drilling. In this way, the drill bit can be moved slowly first and then at high speed to complete the drilling without speed regulation, thereby ensuring the stability and service life of the drill bit.

[0019] 3. Under the action of the limit plate, whenever the printed circuit board is placed on the workbench, the limit plate can limit the printed circuit board to prevent the printed circuit board from moving and affecting the quality of the through-holes, thereby ensuring the through-hole quality of the printed circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the three-axis moving machine, the movable base and the drilling machine of the present invention.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the servo motor and the cylinder of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting head and the screw rod of the present invention.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the contact rod of the present invention.

[0025] Figure 6 It is a schematic diagram of the main structure of the cylinder and the contact rod of the present invention.

[0026] Figure 7 It is a schematic cross-sectional structural diagram of the mounting head of the present invention.

[0027] Figure 8 It is a schematic cross-sectional structural diagram of the drive ring of the present invention.

[0028] Fig. 9 This is a structural separation diagram of the fixing column and the clamping block of the present invention.

[0029] Fig.10 It is a schematic diagram of the three-dimensional structure of the limiting component of the present invention.

[0030] Fig.11 It is a schematic diagram of the three-dimensional structure of the loading and unloading assembly of the present invention.

[0031] Fig.12It is a schematic diagram of the three-dimensional structure of the return spring and the movable ring of the present invention.

[0032] Fig.13 It is a three-dimensional structural schematic diagram of the fixing frame and the connecting spring II of the present invention.

[0033] Figure numbers: 1_workbench, 2_box, 3_box door, 4_swing plate, 5_three-axis moving machine, 6_movable seat, 7_drilling machine, 71_mounting head, 8_servo motor, 9_barrel, 10_screw, 11_contact rod, 12_guide seat, 121_guide rod, 122_annular dust suction pipe, 1221-dust suction pump, 1222-knob, 1223-spur gear, 1224-rack, 123_compression spring , 124_corrugated cover, 13_fixed column, 131_clamping block, 132_connecting spring I, 133_driving ring, 134_support spring, 14_vertical rod, 141_limiting plate, 142_buffer spring, 15_fixed seat, 151_placing seat, 152_fixed cylinder, 153_u-shaped plate, 1531_reset spring, 154_trigger rod, 155_movable ring, 16_fixed frame, 17_connecting spring II. DETAILED DESCRIPTION

[0034] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0035] Embodiment: A stable through-hole device for producing printed circuit boards, see Figure 1-10As shown, it includes a workbench 1 and a box body 2 fixedly connected to the top of the workbench 1, the top of the box body 2 is rotatably connected to a box door 3, the lower part of the front side of the box body 2 is rotatably connected to a swing plate 4, when the swing plate 4 swings downward to a horizontal state, the swing plate 4 can be used to place tools, a three-axis mobile machine 5 is arranged on the inner side of the box body 2, a movable seat 6 is fixedly connected to the moving part of the three-axis mobile machine 5, a drilling machine 7 is slidably connected to the front side of the movable seat 6, a mounting head 71 is fixedly connected to the shaft of the drilling machine 7, and also includes a pitch change component, a dust suction pump 1221, a knob 1222, a spur gear 1223, a rack 1224, a dust suction component and a clamping component, a clamping component is arranged on the mounting head 71, when the clamping component is in operation, the clamping component can realize clamping and fixing drill bits of different specifications, the dust suction component is installed on the drilling machine 7, when the dust suction component is in operation, the dust suction component can realize fixing the drill bits that appear in the drilling Dust and debris are sucked away, a dust pump 1221 is installed on the rear side of the top outside the box body 2, and the air inlet end of the dust pump 1221 is connected and communicated with the dust suction component. A knob 1222 is installed on the upper part of the front side of the movable seat 6, and the knob 1222 is electrically connected to the dust pump 1221 and can control the power of the dust pump 1221. A spur gear 1223 is fixedly connected to the outer side of the knob 1222 along the circumferential direction, and a rack 1224 is fixedly connected to the right rear side of the top of the drilling machine 7. The rack 1224 is meshed with the spur gear 1223. When the drilling machine 7 moves so that the drill bit moves downward, the drilling machine 7 drives the rack 1224 to move downward, the rack 1224 drives the spur gear 1223 to rotate forward, and the spur gear 1223 drives the knob 1222 to rotate forward. The forward rotation of the knob 1222 adjusts the suction power of the dust pump 1221, so that the suction power of the dust pump 1221 is adaptively adjusted with the degree of drilling.

[0036] See also Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the variable pitch assembly includes a servo motor 8, a barrel 9, a screw 10 and a contact rod 11. A barrel 9 is fixedly connected to the middle of the top of the drilling machine 7, and seven contact rods 11 are evenly fixedly connected to the middle of the inner side of the barrel 9. The distribution of the contact rods 11 is gradually inclined from right to left. The screw 10 is vertically slidably connected in the barrel 9. The pitch of the upper part of the screw 10 is smaller, and the pitch of the lower part of the screw 10 is larger. The pitch of the screw 10 gradually increases from top to bottom, and the thread of the screw 10 contacts the contact rod 11. The servo motor 8 is fixedly connected to the upper part of the front side of the movable seat 6, and the output shaft end of the servo motor 8 is fixedly connected to the top of the screw 10. The servo motor 8 is used to drive the screw 10 to reverse. The reversal of the screw 10 first drives the contact rod 11 to move downward, and the contact rod 11 drives the drilling machine 7 to move downward through the barrel 9. The drilling machine 7 drives the drill bit to move slowly downward, and then as the pitch of the screw 10 increases, the drill bit moves downward at high speed to complete the final drilling.

[0037] See also Figure 3 and Figure 4 As shown, the dust suction assembly includes a guide seat 12, a guide rod 121, an annular dust suction pipe 122, a compression spring 123 and a corrugated cover 124. The guide seat 12 is evenly spaced and fixedly connected to the lower part of the drilling machine 7. The four guide seats 12 are slidably connected with the guide rods 121. The annular dust suction pipe 122 is fixedly connected between the four guide rods 121. The annular dust suction pipe 122 can extract dust and debris generated by drilling. The annular dust suction pipe 122 is connected and communicated with the air inlet end of the dust suction pump 1221. A corrugated cover 124 is connected between the top of the annular dust suction pipe 122 and the lower part of the drilling machine 7. When the drill bit drills holes in the printed circuit board, the corrugated cover 124 can block the debris and dust. A compression spring 123 is connected between the top of the annular dust suction pipe 122 and the bottom of the four guide seats 12. The compression spring 123 is sleeved on the guide rod 121.

[0038] See also Figure 7-Figure 9 As shown, the clamping assembly includes a fixed column 13, a clamping block 131, a connecting spring Ⅰ132 and a trigger assembly. The top of the mounting head 71 is fixedly connected with the fixed column 13, and the bottom of the fixed column 13 is evenly spaced and slidably connected with three clamping blocks 131. The clamping blocks 131 can clamp and fix drill bits of different specifications. The side of the three clamping blocks 131 close to each other is evenly spaced with protrusions to increase the friction between the clamping blocks 131 and the drill bit, so that the clamping blocks 131 can clamp and fix the drill bit more firmly. The lower parts of the sides of the three clamping blocks 131 away from each other are connected to the lower part of the inner side of the mounting head 71 with connecting springs Ⅰ11 32. A trigger assembly is provided on the mounting head 71. When the trigger assembly is in operation, the trigger assembly can drive the clamping block 131 to move. The trigger assembly includes a driving ring 133 and a supporting spring 134. The driving ring 133 is slidably connected to the lower part of the mounting head 71. The inner circumference of the driving ring 133 is a conical surface, and the upper outer part of the clamping block 131 is an inclined surface. The conical surface of the driving ring 133 contacts the inclined surface of the clamping block 131. The driving ring 133 can drive the three clamping blocks 131 to close together. A supporting spring 134 is connected between the top of the driving ring 133 and the inner top of the mounting head 71. The supporting spring 134 is sleeved on the fixing column 13.

[0039] See also Fig.10 As shown, it also includes a limit assembly, which includes a vertical rod 14, a limit plate 141 and a buffer spring 142. Eight vertical rods 14 are evenly spaced and fixed to the bottom of the workbench 1. The eight vertical rods 14 are slidably mounted with limit plates 141. The eight limit plates 141 slide through the top of the workbench 1. When the printed circuit board is placed on the workbench 1, the limit plate 141 can limit the printed circuit board. A buffer spring 142 is connected between the inner side of the limit plate 141 and the lower part of the vertical rod 14.

[0040] First, pull the box door 3 upward to swing open, and then pull the swing plate 4 downward to swing ninety degrees to a horizontal state, so that multiple printed circuit boards can be stacked on the workbench 1, and the printed circuit boards are between the eight limit plates 141. The eight limit plates 141 limit the printed circuit boards. Then, pull the swing plate 4 upward to swing back to reset, and then pull the box door 3 downward to swing back to reset, start the three-axis mobile machine 5 to drive the movable seat 6 to move back and forth and left and right, and the movable seat 6 drives the drilling machine 7 to move. When the drilling machine 7 moves to the initial drilling position of the printed circuit board, turn off the three-axis mobile machine 5, start the drilling machine 7 to drive the drill bit to rotate, and then start the servo motor 8 to reverse and drive the screw 10 to reverse. Since the pitch of the screw 10 gradually increases from top to bottom, the screw 10 reverses first The contact rod 11 is driven to move slowly downward, and the contact rod 11 moves downward through the cylinder 9 to drive the drilling machine 7 to move slowly and steadily downward. The drilling machine 7 drives the drill bit to move downward through the mounting head 71. At the same time, the downward movement of the drilling machine 7 also drives the guide seat 12 to move downward. The guide seat 12 drives the annular dust suction pipe 122 to move downward through the compression spring 123. The downward movement of the annular dust suction pipe 122 drives the guide rod 121 to move downward. When the annular dust suction pipe 122 moves downward and contacts the printed circuit board, the annular dust suction pipe 122 stops moving downward. The annular dust suction pipe 122 stops the guide rod 121 from continuing to move downward. The guide seat 12 continues to move downward to compress the compression spring 123, and the downward movement of the drilling machine 7 drives the rack 1224 to move slowly downward first. The rack 1224 drives the spur gear 1223 to rotate forward, and the spur gear 1223 drives the knob 1222 to rotate forward slowly. The knob 1222 rotates forward slowly, and the dust suction power of the dust suction pump 1221 is slowly turned on through the control module. The dust suction pump 1221 causes the annular dust suction pipe 122 to suck at a low power. At the same time, the drill bit continues to move slowly downward to contact the printed circuit board for pre-drilling. The corrugated cover 124 can block a small amount of dust and debris that appear in the pre-drilling, and the annular dust suction pipe 122 removes the dust and debris that appear in the pre-drilling. As the screw 10 continues to reverse, the larger pitch of the screw 10 contacts the contact rod 11. Due to the larger pitch of the screw 10, the screw 10 drives the contact rod 11 to move downward at a high speed, so that the drill bit moves downward at a high speed to complete the The final drilling of the printed circuit board completes the through-hole processing of the printed circuit board, and the rack 1224 drives the knob 1222 to continue to rotate to the maximum stroke through the spur gear 1223, which makes the dust suction pump 1221 open to the maximum dust suction power. The suction force of the annular dust suction tube 122 is greater to extract a large amount of dust and debris appearing in the final drilling, which can prevent the dust and debris appearing in the drilling from remaining on the printed circuit board and affecting the printed circuit board, thereby ensuring the cleanliness of the printed circuit board. During the drilling process, the limit plate 141 limits the printed circuit board to prevent the printed circuit board from moving and affecting the quality of the through hole. In this way, the drill bit can move slowly first and then move at high speed to complete the drilling without speed regulation, thereby ensuring the stability and service life of the drill bit.The vacuum power is adaptively adjusted according to the degree of drilling, and the adaptability is high, so there is no need to start the vacuum pump 1221 for high-power operation all the time, thereby saving electric energy and increasing the service life of the vacuum pump 1221. When the drilling of the printed circuit board is completed, the servo motor 8 is started to rotate forward to drive the screw 10 to rotate forward. The screw 10 rotates forward to contact the rod 11 to move upward, and the contact rod 11 drives the drilling machine 7 to move upward and reset through the cylinder 9. The drilling machine 7 is reset and drives the drill bit to move upward and reset through the installation head 71. At the same time, the drilling machine 7 also drives the guide seat 12 to move upward and reset. The guide seat 12 moves upward to reset first, and the compression spring 123 is reset first. Then the guide seat 12 drives the annular vacuum tube 122 to move upward and reset through the compression spring 123. The annular vacuum tube 122 is out of contact with the printed circuit board, and the drilling machine 7 moves upward to drive the rack 1224 to move upward and reset. The rack 1224 resets and drives the spur gear 1223 to reverse and reset. The gear 1223 drives the knob 1222 to reverse and reset. The knob 1222 is reset and the dust suction pump 1221 is controlled to be turned off through the control module. Then the three-axis moving machine 5 is started again, so that the drill bit moves to the next through-hole position for drilling. When the drilling position is at the edge of the printed circuit board, the annular dust suction pipe 122 moves downward and contacts with the limit plate 141 first. The annular dust suction pipe 122 pushes the limit plate 141 to move downward, and the buffer spring 142 is compressed. When the limit plate 141 moves downward and is at the same horizontal height as the printed circuit board, the limit plate 141 stops moving downward, and the annular dust suction pipe 122 contacts the printed circuit board. The drill bit continues to move downward to drill the printed circuit board. When the annular dust suction pipe 122 moves upward and resets, the annular dust suction pipe 122 resets and disengages from the limit plate 141. Due to the action of the buffer spring 142, the limit plate 141 moves upward and resets to continue to limit the printed circuit board. When the printed circuit board is drilled, the door 3 and the swing plate 4 are pulled open, and then the printed circuit board is removed for subsequent processing.

[0041] Drill bit replacement: Initially, the connection spring Ⅰ132 is in a stretched state. When the specification of the drill bit needs to be replaced, the drive ring 133 is pushed to move upward, the support spring 134 is compressed, and the drive ring 133 moves upward and disengages from the clamping block 131. Due to the action of the connection spring Ⅰ132, the three clamping blocks 131 move away from each other to release the drill bit, and the drill bit falls from the mounting head 71. Then the required drill bit is inserted into the mounting head 71. The drill bit is now between the three clamping blocks 131 and is released. The driving ring 133, due to the action of the supporting spring 134, moves downward to reset and contact the three clamping blocks 131. The driving ring 133 drives the three clamping blocks 131 to move in a direction close to each other, the connecting spring I 132 is stretched, and the three clamping blocks 131 are close to each other to clamp and fix the drill bit. Since the clamping block 131 is provided with a protrusion, the friction between the clamping block 131 and the drill bit can be increased, so that the clamping block 131 can clamp and fix the drill bit more firmly, and the printed circuit board can be drilled. In this way, drill bits of different specifications can be clamped and fixed.

[0042] See also Fig.11 and Fig.12 As shown, the stable through-hole production equipment for printed circuit boards also includes a loading and unloading assembly installed between the workbench 1 and the mounting head 71, and the loading and unloading assembly includes a fixed seat 15, a placement seat 151, a fixed cylinder 152, a U-shaped plate 153, a reset spring 1531, a trigger rod 154 and a movable ring 155. The front side of the top of the workbench 1 is fixedly connected to the fixed seat 15, and the middle of the top of the fixed seat 15 is fixedly connected to the placement seat 151. The placement seat 151 can place drill bits of different specifications. The top of the fixed seat 15 is symmetrically fixed with a fixed cylinder 152, and the left and right sides of the fixed cylinder 152 are fixedly connected. Three U-shaped plates 153 are fixedly connected to the top of the fixed cylinders 152 on the right sides at uniform intervals along the circumferential direction, and a trigger rod 154 is slidably inserted into the inner side of the U-shaped plate 153. The top of the trigger rod 154 is an inclined surface, and a return spring 1531 is connected between the lower part of the trigger rod 154 and the inner side of the U-shaped plate 153. A movable ring 155 is fixedly sleeved on the middle part of the outer side of the mounting head 71, and the movable ring 155 corresponds to the trigger rod 154. When the movable ring 155 moves downward and contacts the inclined surface of the trigger rod 154, the movable ring 155 can drive the trigger rod 154 to move.

[0043] Initially, drill bits of different specifications are placed on the placement seat 151. When the drill bit needs to be replaced, the drill bit to be replaced is placed in the right fixed cylinder 152, and the three-axis mobile machine 5 is started to move the drill bit to the top of the left fixed cylinder 152. The three-axis mobile machine 5 then drives the movable seat 6 to move downward. The movable seat 6 drives the installation head 71 to move downward through the drilling machine 7. The installation head 71 drives the drill bit and the movable ring 155 to move downward. The drill bit moves downward and is located in the left fixed cylinder 152. At the same time, the installation head 71 drives the driving ring 133 to move downward through the supporting spring 134. When the driving ring 133 moves downward and contacts with the trigger rod 154, the trigger rod 154 limits the driving ring 133. The mounting head 71 continues to move downward to compress the supporting spring 134, and the mounting head 71 continues to move downward to drive the clamping block 131 downward through the fixing column 13, and the clamping block 131 moves downward and loses contact with the driving ring 133. Due to the action of the connecting spring I 132, the three clamping blocks 131 move away from each other to loosen the drill bit, and the loosened drill bit falls into the left fixed cylinder 152. At this time, the three-axis mobile machine 5 is started to make the drilling machine 7 move upward and reset. The drilling machine 7 drives the movable ring 155 to move upward and reset through the mounting head 71. The mounting head 71 drives the movable ring 155 to move upward and reset through the supporting spring 134 and loses contact with the trigger rod 154. Due to the action of the supporting spring 134, the driving The movable ring 133 moves and resets, driving the three clamping blocks 131 to move and reset in a direction close to each other. Then the three-axis mobile machine 5 continues to operate and drives the drilling machine 7 to move to just above the right fixed cylinder 152, and makes the installation head 71 move downward to drive the driving ring 133 and the movable ring 155 to move downward. The driving ring 133 moves downward and contacts the trigger rod 154, so that the three clamping blocks 131 move in a direction away from each other. The installation head 71 continues to move downward and drives the clamping block 131 to move downward through the fixed column 13. The drill bit is in the clamping block 131 that moves downward. The movable ring 155 continues to move downward and contacts the inclined surface of the trigger rod 154. The movable ring 155 drives the three contact rods 11 in a direction away from each other. , the reset spring 1531 is compressed, the three contact rods 11 move away from each other and lose contact with the drive ring 133. Due to the action of the support spring 134, the drive ring 133 moves downward and resets, pushing the three clamping blocks 131 to move toward each other and reset. The three clamping blocks 131 clamp the drill bit in the right fixed cylinder 152. At this time, the three-axis mobile machine 5 continues to operate to make the drilling machine 7 move upward and reset. The clamping block 131 also drives the drill bit to move upward to the outside of the right fixed cylinder 152, and the installation head 71 drives the movable ring 155 to move upward and reset and lose contact with the trigger rod 154. Due to the action of the reset spring 1531, the three contact rods 11 move toward each other and reset. In this way, there is no need to manually replace the drill bit, which facilitates the replacement of the drill bit.

[0044] See also Fig.13As shown, the equipment for producing stable through-holes in printed circuit boards also includes a fixing frame 16 and a connecting spring II 17. The fixing frame 16 is symmetrically fixed to the upper part of the front side of the movable seat 6. The fixing frames 16 on both sides slide through the outer side of the drilling machine 7. The left and right sides of the top of the drilling machine 7 are symmetrically connected to the upper parts of the left and right fixing frames 16 with connecting springs II 17 front and back.

[0045] When the screw rod 10 drives the drilling machine 7 to move downward through the contact rod 11 and the barrel 9, the drilling machine 7 drives the connection spring II 17 to move downward, and the connection spring II 17 is stretched. Then, when the screw rod 10 drives the drilling machine 7 to move upward and reset through the contact rod 11 and the barrel 9, the connection spring II 17 resets and assists the drilling machine 7 to move upward and reset due to the action of the connection spring II 17. In this way, the bearing force of the screw rod 10 and the contact rod 11 on the drilling machine 7 can be reduced, thereby increasing the service life of the screw rod 10 and the contact rod 11.

[0046] Finally, it is necessary to point out that the above content is only used to help understand the technical solution of the present invention and cannot be understood as limiting the scope of protection of the present invention; non-essential improvements and adjustments made by technical personnel in the field of technology based on the above content of the present invention are all within the scope of protection required by the present invention.

Claims

1. A stable through-hole production device for printed circuit boards, comprising a workbench (1) and a box (2) fixedly connected to the workbench (1), a box door (3) and a swing plate (4) being rotatably connected to the box (2), a three-axis moving machine (5) being arranged inside the box (2), a movable seat (6) being fixedly connected to the moving part of the three-axis moving machine (5), a drilling machine (7) being slidably connected to the movable seat (6), a mounting head (71) being fixedly connected to the shaft of the drilling machine (7), characterized in that: The machine also comprises a variable pitch component, a dust suction pump (1221), a knob (1222), a spur gear (1223), a rack (1224), a dust suction component and a clamping component. The mounting head (71) is provided with a clamping component for clamping and fixing drill bits of different specifications. The dust suction component is mounted on the drilling machine (7) for collecting dust and debris generated by drilling. The top of the housing (2) is provided with a dust suction pump (1221). The air inlet end of the dust suction pump (1221) is connected and communicated with the air outlet end of the annular dust suction pipe (122). The movable seat (6) is provided with a knob (1222). The knob (1222) is electrically connected and controllably connected to the dust suction pump (1221). The power of the dust suction pump (1221) is controlled, a spur gear (1223) is fixedly connected to the outer side surface of the knob (1222) along the circumferential direction, a rack (1224) meshing with the spur gear (1223) is fixedly connected to the top of the drilling machine (7), and when the drilling machine (7) moves so that the drill bit moves downward, the drilling machine (7) drives the rack (1224) to move downward, the rack (1224) drives the spur gear (1223) to rotate forward, and the spur gear (1223) drives the knob (1222) to rotate forward, and the forward rotation of the knob (1222) adjusts the dust suction power of the dust suction pump (1221), so that the dust suction power of the dust suction pump (1221) is adaptively adjusted according to the degree of drilling.

2. A printed circuit board production stable through-hole device according to claim 1, characterized in that: The pitch-changing assembly comprises a barrel (9) fixed to the top of the drilling machine (7), contact rods (11) fixed to the inner side of the barrel (9) at even intervals, the contact rods (11) being gradually inclined from right to left, a screw rod (10) being vertically slidably connected in the barrel (9), the pitch of the upper part of the screw rod (10) being smaller, the pitch of the lower part of the screw rod (10) being larger, the pitch of the screw rod (10) gradually increasing from top to bottom, the thread of the screw rod (10) being in contact with the contact rod (11), and the movable seat (6) A servo motor (8) is fixedly connected to the upper portion, and the end of the output shaft of the servo motor (8) is fixedly connected to the end of the screw rod (10). The servo motor (8) is used to drive the screw rod (10) to rotate in reverse. The screw rod (10) rotates in reverse to first drive the contact rod (11) to move downward. The contact rod (11) drives the drilling machine (7) to move downward through the barrel (9). The drilling machine (7) drives the drill bit to move slowly downward. Subsequently, as the pitch of the screw rod (10) increases, the drill bit moves downward at high speed to complete the final drilling.

3. A printed circuit board production stable through-hole device according to claim 2, characterized in that: The dust suction assembly comprises a guide seat (12) fixedly connected to the drilling machine (7) at even intervals, a guide rod (121) slidably penetrated on the guide seat (12), an annular dust suction pipe (122) fixedly connected between the guide rods (121) for removing dust and debris generated by drilling, the annular dust suction pipe (122) being connected and communicated with an air inlet end of a dust suction pump (1221), a corrugated cover (124) being connected between the annular dust suction pipe (122) and the drilling machine (7) for blocking debris and dust, and a compression spring (123) sleeved on the guide rod (121) being connected between the annular dust suction pipe (122) and the guide seat (12).

4. A printed circuit board production stable through-hole device according to claim 3, characterized in that: The clamping assembly comprises a fixing column (13) fixed to the inner side of the mounting head (71); a clamping block (131) is slidably connected at even intervals to the bottom of the fixing column (13) to clamp and fix drill bits of different specifications; a connecting spring I (132) is connected between the clamping block (131) and the mounting head (71); and a trigger assembly is provided on the mounting head (71) to drive the clamping block (131) to move.

5. A printed circuit board production stable through-hole device according to claim 4, characterized in that: The clamping block (131) is provided with protrusions at even intervals, for increasing the friction between the clamping block (131) and the drill bit.

6. A printed circuit board production stable through-hole device according to claim 5, characterized in that: The trigger assembly comprises a driving ring (133) slidably connected to the mounting head (71); the inner circumferential side of the driving ring (133) is a conical surface; the upper outer side of the clamping block (131) is an inclined surface; the conical surface of the driving ring (133) contacts the inclined surface of the clamping block (131) to drive the clamping block (131) to move; and a supporting spring (134) sleeved on the fixing column (13) is connected between the driving ring (133) and the mounting head (71).

7. A printed circuit board production stable through-hole device according to claim 6, characterized in that: The invention also comprises a limit assembly, which comprises vertical rods (14) fixedly connected to the bottom of the workbench (1) at even intervals, a limit plate (141) slidably mounted on the vertical rods (14), the limit plate (141) slidably passing through the top of the workbench (1) to limit the printed circuit board, and a buffer spring (142) is connected between the limit plate (141) and the vertical rods (14).

8. A printed circuit board production stable through-hole device according to claim 7, characterized in that: The stable through-hole production device for printed circuit boards also includes a loading and unloading assembly, which includes a fixed seat (15) fixedly connected to the top of a workbench (1), a placement seat (151) fixedly connected to the top of the fixed seat (15) for placing drill bits of different specifications, a fixed cylinder (152) symmetrically fixedly connected to the top of the fixed seat (15), a U-shaped plate (153) fixedly connected to the top of the fixed cylinder (152) at uniform intervals along the circumferential direction, a trigger rod (154) slidably penetrated on the inner side of the U-shaped plate (153), the top of the trigger rod (154) is an inclined surface, a return spring (1531) is connected between the trigger rod (154) and the U-shaped plate (153), and a movable ring (155) corresponding to the trigger rod (154) is fixedly sleeved on the outer side of the mounting head (71) to drive the trigger rod (154) to move.

9. A printed circuit board production stable through-hole device according to claim 8, characterized in that: The stable through-hole production equipment for printed circuit boards also includes a fixed frame (16) symmetrically fixed to the movable seat (6), the fixed frame (16) slidingly penetrates the outer side surface of the drilling machine (7), and a connecting spring II (17) is symmetrically connected between the drilling machine (7) and the fixed frame (16).

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