A grinding device for producing printed circuit boards

Abstract

The present invention provides a grinding device for printed circuit board production, which relates to the technical field of grinding devices, and includes: a workbench and a plurality of fastening cylinders for fastening circuit boards; the workbench is rotatably connected to a support plate, and a grinding wheel for grinding the side wall of the circuit board is arranged inside the workbench; the fastening cylinder includes an outer shell fixedly connected to the support plate, the outer shell is provided with a first air inlet and a second air inlet, the outer shell is slidably connected to the inner shell, the inner shell is provided with a venting groove that can be connected to the second air inlet, a cylinder rod is slidably connected inside the inner shell, and a compression spring is arranged between the bottom wall of the inner shell and the outer shell; the workbench is provided with a driving mechanism for driving the support plate to rotate and a transmission mechanism for driving the grinding wheel to abut against the side wall of the circuit board. The present invention has the function of improving the orderliness of realizing the grinding function of the circuit board and improving the stability of the circuit board being fastened.

Description

Technical Field

[0001] The invention relates to the technical field of grinding devices, and in particular to a grinding device for producing printed circuit boards. Background Art

[0002] A printed circuit board is a substrate used to support electronic components. It is usually made of insulating materials and coated with conductive materials to connect and support electronic components. Edge grinding of printed circuit boards is a common manufacturing step that helps keep the edges of printed circuit boards smooth and neat, and can improve the safety of printed circuit boards.

[0003] For example, in the Chinese patent with publication number CN216066860U, entitled Edge Grinding Device for Copper Clad Laminate Production for Printed Circuit Boards, when the printed circuit board needs to be polished, the staff puts the circuit board on the workbench, and then the No. 2 motor drives the pressing plate to press and limit the circuit board, and then the cylinder drives the sanding machine to move to both sides of the raw material, and starts the sanding machine to drive the sanding machine to polish both sides of the raw material. The cylinder moves away from the raw material through the sanding machine, and the No. 1 motor rotates the two sides that have not been polished to the front end of the sanding machine, and the cylinder continues to move the sanding machine to both sides of the circuit board for polishing.

[0004] With respect to the above-mentioned related technologies, the pressing plate is used to press and limit the circuit board. Due to the different sizes of the circuit boards, when the area of ​​the circuit board is smaller than the area of ​​the pressing plate, the sanding machine interferes with the side wall of the pressing plate and cannot contact the side wall of the circuit board, which has a negative impact on the grinding of the side wall of the circuit board. When the area of ​​the circuit board is too large, it is difficult for the pressing plate to press and support the edge of the circuit board. The grinding of the sanding machine and the side wall of the circuit board will increase the shaking amplitude of the edge of the circuit board, thereby reducing the grinding accuracy of the side wall of the circuit board. Therefore, it is necessary to replace the pressing plate of the corresponding size for circuit boards of different sizes, which increases the operating steps of the staff and reduces the efficiency of grinding the side wall of the circuit board. Summary of the invention

[0005] In view of this, the present invention provides a polishing device for printed circuit board production, aiming to solve the problem that when the pressing plate is fastening circuit boards of different specifications, the sanding machine interferes with the side wall of the pressing plate, and the sanding machine polishes the side wall of the circuit board, increasing the shaking amplitude of the edge of the circuit board.

[0006] In order to solve the above technical problems, the present invention provides a polishing device for printed circuit board production, comprising a workbench and a plurality of fastening cylinders for fastening circuit boards; the workbench is rotatably connected to a support plate, two support plates are arranged in a vertical direction, and a grinding wheel for polishing the side wall of the circuit board is arranged in the workbench; the fastening cylinder comprises an outer shell fixedly connected to the support plate, the outer shell is provided with a first air inlet hole and a second air inlet hole, the outer shell is slidably connected to an inner shell, the inner shell is provided with a ventilation groove that can be connected to the second air inlet hole, a cylinder rod is slidably connected in the inner shell, and an extrusion spring is arranged between the bottom wall of the inner shell and the outer shell; the workbench is provided with a driving mechanism for driving the support plate to rotate and a transmission mechanism for driving the grinding wheel to abut against the side wall of the circuit board.

[0007] By adopting the above technical scheme, the number of fastening cylinders that can fasten the circuit board is determined according to the size of the circuit board, and the number of fastening cylinders involved in the circuit board fastening work is adaptively adjusted according to circuit boards of different sizes. Under the premise that the grinding wheel does not interfere with the fastening cylinders, multiple fastening cylinders are used to press and fix the circuit board, thereby increasing the contact area of ​​the circuit board being pressed and fixed, thereby improving the stability of the circuit board being fastened, reducing the shaking amplitude when the edge of the circuit board is polished, and thereby improving the polishing accuracy of the side wall of the circuit board.

[0008] Optionally, the transmission mechanism includes a first rotation source fixedly connected to the side wall of the workbench, the drive shaft of the first rotation source is fixedly sleeved with a driving gear, the workbench is slidably connected to a transmission rack that can mesh with the driving gear, and the transmission rack is fixedly connected to one end away from the first rotation source with a second rotation source for driving the grinding wheel to rotate.

[0009] Optionally, the extrusion spring sleeve is provided with a supporting shell, the supporting shell is slidably connected to a transmission shell inside, the transmission shell is fixedly sleeved with an unlocking ring at one end away from the supporting shell, the workbench is fixedly connected to a third rotation source, the driving shaft fixing sleeve of the third rotation source is provided with a connecting gear, the workbench is slidably connected to a connecting rack that can mesh with the connecting gear, the connecting rack is rotatably connected to a measuring wheel at one end away from the connecting gear, the connecting rack is slidably connected to a transmission rod, a limiting spring is arranged between the connecting rack and the transmission rod, and the transmission rod is rotatably connected to an unlocking wheel that can drive the unlocking ring to move downward.

[0010] By adopting the above technical solution, the unlocking wheel squeezes the unlocking ring to move downward, and the airflow input from the first air inlet squeezes the inner shell to move downward, so that the ventilation groove and the inner shell move and connect with the inside of the second air inlet, so that the cylinder rod located at the edge that is not completely in contact with the circuit board is separated from the circuit board, further reducing the probability of interference between the fastening cylinder and the grinding wheel to cause working accidents, and improving the orderliness of the circuit board being ground.

[0011] Optionally, a support spring is provided on the side wall sleeve of the cylinder rod.

[0012] By adopting the above technical solution, the support spring enables the extrusion cylinder rod to overcome the gravity and extend out of the outer shell to abut against the circuit board.

[0013] Optionally, the side wall of the support plate is provided with a transmission tooth groove along the circumferential direction, and the driving mechanism includes a fourth rotation source fixedly connected to the side wall of the workbench, the driving shaft of the fourth rotation source is fixedly sleeved with a transmission wheel, the workbench is rotatably connected to a rotating rod, the side wall of the rotating rod is fixedly sleeved with a driven wheel, the outer side walls of the transmission wheel and the driven wheel are sleeved with a first conveyor belt, and both ends of the rotating rod are fixedly sleeved with transmission gears that can mesh with the transmission tooth groove.

[0014] Optionally, the support plate located below is slidably connected to a support platform, and the support plate is fixedly connected to a linear driver for driving the support platform to move in a vertical direction.

[0015] By adopting the above technical solution, the linear drive drives the support platform to move between the upper and lower fastening cylinders, and supports the circuit board before the fastening cylinders fasten the circuit board.

[0016] Optionally, a protective shaft is fixedly connected to the fastening cylinder drive shaft on the upper side, and a protective shell capable of cooperating with the protective shaft is fixedly connected to the fastening cylinder drive shaft on the lower side.

[0017] By adopting the above technical solution, the protective shaft and the protective housing reduce the damage to the surface of the circuit board when the cylinder is tightened to press the circuit board. At the same time, when the cylinder rod on the upper side abuts the cylinder rod on the lower side, the protective shaft extends into the protective housing to improve the stability of the abutment between the cylinder rod on the upper side and the cylinder rod on the lower side.

[0018] Optionally, valves are provided in the first air inlet hole and the second air inlet hole.

[0019] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects:

[0020] 1. The number of fastening cylinders that can fasten the circuit board is determined according to the size of the circuit board, so that the number of fastening cylinders involved in the circuit board fastening work is adaptively adjusted according to circuit boards of different sizes, reducing the probability of interference between the grinding wheel and the fastening cylinder, improving the orderliness of the circuit board grinding function, and at the same time, multiple fastening cylinders are used to press and fix the circuit board, thereby increasing the contact area of ​​the circuit board being pressed and fixed, thereby improving the stability of the circuit board being fastened, reducing the shaking amplitude of the edge of the circuit board when being polished, and thereby improving the grinding accuracy of the side wall of the circuit board.

[0021] 2. The unlocking wheel squeezes the unlocking ring to move downward, and the airflow input from the first air inlet squeezes the inner shell to move downward, so that the ventilation groove and the inner shell move to communicate with the inside of the second air inlet, so that the cylinder rod located at the edge that is not completely in contact with the circuit board is separated from the circuit board, further reducing the probability of interference between the fastening cylinder and the grinding wheel to cause working accidents, and improving the orderliness of the circuit board being ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a support plate according to an embodiment of the present invention;

[0024] Figure 3 It is a structural schematic diagram of a transmission mechanism according to an embodiment of the present invention;

[0025] Figure 4 A cross-sectional view of a fastening cylinder in a reset state according to an embodiment of the present invention;

[0026] Figure 5 It is a cross-sectional view of the interior of the cylinder that is not in contact with the circuit board according to the embodiment of the present invention;

[0027] Figure 6 A cross-sectional view of the interior of a fastening cylinder for fastening a circuit board according to an embodiment of the present invention;

[0028] Figure 7 A cross-sectional view of a tightening cylinder in a contracted state according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic structural diagram of the relative positions of the transmission rack and the connecting rack according to an embodiment of the present invention;

[0030] Fig. 9 This is a schematic diagram of the structure of a measuring wheel and an unlocking wheel according to an embodiment of the present invention;

[0031] Fig.10 It is a structural schematic diagram of a driving mechanism according to an embodiment of the present invention;

[0032] Fig.11It is a schematic structural diagram of a protective shaft and a protective housing according to an embodiment of the present invention.

[0033] Explanation of the reference numerals: 1. workbench; 11. support plate; 111. transmission tooth groove; 2. fastening cylinder; 21. outer shell; 211. first air inlet hole; 212. second air inlet hole; 222. air delivery hole; 22. inner shell; 221. ventilation groove; 23. cylinder rod; 24. extrusion spring; 25. support shell; 26. transmission shell; 261. unlocking ring; 262. limiting ring; 27. support spring; 28. protective shaft; 29. ​​protective shell; 3. grinding wheel; 4. driving mechanism; 41. fourth rotation source ; 42. Transmission wheel; 43. Rotating rod; 44. Driven wheel; 45. First conveyor belt; 46. Transmission gear; 5. Transmission mechanism; 51. First rotation source; 52. Driving gear; 53. Transmission rack; 54. Second rotation source; 55. First pulley; 56. Second conveyor belt; 57. Second pulley; 6. Third rotation source; 61. Connecting gear; 62. Connecting rack; 63. Measuring wheel; 64. Transmission rod; 65. Limit spring; 66. Unlocking wheel; 7. Support table; 71. Linear drive; 8. Valve. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 11 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0035] This embodiment provides a grinding device for producing a printed circuit board. Figure 1 , Figure 2 and Figure 3 A grinding device for producing printed circuit boards includes a workbench 1, which is rotatably connected to two support plates 11, which are arranged in a vertical direction, and each support plate 11 is fixedly connected to a plurality of fastening cylinders 2 for fastening the circuit board, and a grinding wheel 3 for grinding the side wall of the circuit board is arranged in the workbench 1. The workbench 1 is provided with a driving mechanism 4 for driving the support plate 11 to rotate and a transmission mechanism 5 for driving the grinding wheel 3 to grind the side wall of the circuit board.

[0036] Reference Figure 4 , Figure 5 and Figure 6The fastening cylinder 2 includes an outer shell 21 fixedly connected to the support plate 11, a first air inlet hole 211 is formed on the top wall of the outer shell 21, a second air inlet hole 212 is formed on the side wall of the outer shell 21, and valves 8 are disposed in the first air inlet hole 211 and the second air inlet hole 212. All the first air inlet holes 211 are connected in series with a first air inlet pipe, and all the second air inlet holes 212 are connected in series with a second air inlet pipe.

[0037] Reference Figure 2 , Figure 4 , Figure 5 and Figure 6 The inner shell 22 is slidably connected to the outer shell 21, and the top wall of the inner shell 22 is provided with an air delivery hole 222, and both the outer shell 21 and the inner shell 22 are connected to the air delivery hole 222. The side wall of the inner shell 22 is provided with a ventilation groove 221 that can be connected to the second air inlet 212, and the cylinder rod 23 is slidably connected to the inner shell 22. The cylinder rod 23 arranged on the upper support plate 11 faces downward, and the cylinder rod 23 arranged on the lower support plate 11 faces upward. The side wall of the cylinder rod 23 is sleeved with a support spring 27, which is in the fastening cylinder 2 facing the cylinder rod 23. The support spring 27 is used to squeeze the cylinder rod 23 to overcome the gravity and extend out of the outer shell 21 to abut against the circuit board. A compression spring 24 is arranged between the outer bottom wall of the inner shell 22 and the inner bottom wall of the outer shell 21.

[0038] Figure 4 The fastening cylinder 2 in the workbench is in the reset state. The staff places the circuit board between the two support plates 11, and introduces air flow into the outer shell 21 through the first air inlet hole 211. The air flow in the outer shell 21 enters the inner shell 22 through the air delivery hole 222. The air flow in the outer shell 21 squeezes the inner shell 22 and the cylinder rod 23 away from the first air inlet hole 211, and the squeezing spring 24 is compressed. The cylinder rods 23 of all the fastening cylinders 2 located above the workbench 1 move downward, and the cylinder rods 23 of all the fastening cylinders 2 located below move upward, and the cylinder rods 23 abutting against the circuit board press and fix the circuit board.

[0039] When the size of the circuit board is smaller than the coverage area of ​​all the fastening cylinders 2, the cylinder rods 23 of the fastening cylinders 2 located outside the circuit board in the horizontal direction do not abut against the circuit board. At this time, the cylinder rods 23 located above and the cylinder rods 23 located below abut against each other, and the cylinder rods 23 are not supported by the vertical upward force of the circuit board. Figure 5At this time, the second air inlet hole 212 in the fastening cylinder 2 is connected to the inside of the ventilation groove 221, and the air flow is delivered to the ventilation groove 221 and the inner shell 22 through the second air inlet hole 212, and the air pressure of the air flow delivered through the second air inlet hole 212 is greater than the air pressure of the air flow delivered through the first air inlet hole 211, so that the air flow in the inner shell 22 squeezes the cylinder rod 23 to move close to the first air inlet hole 211, so that the cylinder rod 23 that is not fastened to the circuit board moves away from the circuit board until the top wall of the cylinder rod 23 abuts against the inner top wall of the inner shell 22 (refer to Figure 7 ), thereby preventing the grinding wheel 3 and the fastening cylinder 2 from interfering with each other when the grinding wheel 3 abuts against the side wall of the circuit board.

[0040] Reference Figure 6 Since the circuit board has thickness and the circuit board has an upward supporting force on the cylinder rod 23, the downward squeezing force of the cylinder rod 23 on the inner shell 22 is reduced, so that the distance between the inner shell 22 that fastens the circuit board and the first air inlet 211 is smaller than the distance between the inner shell 22 that does not fasten the circuit board and the first air inlet 211. Therefore, when the cylinder rod 23 fastens the circuit board, the second air inlet 212 is not connected to the inside of the ventilation groove 221, and the airflow in the ventilation groove 221 cannot enter the inner shell 22 to make the cylinder rod 23 separate from the circuit board. At this time, the cylinder rod 23 continues to fasten the circuit board. The transmission mechanism 5 drives the grinding wheel 3 to abut against the side wall of the circuit board, and the driving mechanism 4 drives the support plate 11 to rotate. The support plate 11 drives the circuit board to rotate through the fastening cylinder 2, so that the grinding wheel 3 grinds the side wall of the circuit board.

[0041] After polishing, the staff takes out the circuit board and the fastening cylinder 2 needs to be reset. For the fastening cylinder 2 that is not in contact with the circuit board, first disconnect the airflow into the second air inlet 212, and the airflow delivered through the first air inlet 211 squeezes the cylinder rod 23 away from the first air inlet 211, then disconnect the airflow into the first air inlet 211, and the compressed squeezing spring 24 pushes the inner shell 22 upward, so that the bottom wall of the inner shell 22 moves to the top of the second air inlet 212, and then re-introduce air into the second air inlet 212, and the airflow squeezes the bottom wall of the inner shell 22 to move the inner shell 22 upward until the outer top wall of the inner shell 22 and the inner top wall of the outer shell 21 abut, completing the reset.

[0042] For the fastening cylinder 2 abutting against the circuit board, the airflow into the second air inlet hole 212 is first disconnected, and the components in the fastening cylinder 2 do not move. Then, the airflow into the first air inlet hole 211 is disconnected, and the compressed extrusion spring 24 pushes the inner shell 22 to move upward. The airflow is introduced into the second air inlet hole 212 again, and the airflow squeezes the bottom wall of the inner shell 22 to move the inner shell 22 upward to complete the reset.

[0043] The number of fastening cylinders 2 that can fasten the circuit board is determined according to the size of the circuit board. The number of fastening cylinders 2 involved in the circuit board fastening work is adaptively adjusted according to circuit boards of different sizes. On the premise that the grinding wheel 3 does not interfere with the fastening cylinders 2, multiple fastening cylinders 2 press and fix the circuit board, thereby increasing the contact area of ​​the circuit board being pressed and fixed, thereby improving the stability of the circuit board being fastened, reducing the shaking amplitude when the edge of the circuit board is polished, and thereby improving the polishing accuracy of the side wall of the circuit board.

[0044] Reference Figure 3 The transmission mechanism 5 includes a first rotation source 51 fixedly connected to the side wall of the workbench 1, a driving shaft fixed sleeve of the first rotation source 51 is provided with a driving gear 52, the workbench 1 is slidably connected with a transmission rack 53 that can mesh with the driving gear 52, the transmission rack 53 is fixedly connected to the end away from the first rotation source 51 with a second rotation source 54 for driving the grinding wheel 3 to rotate, the driving shaft fixed sleeve of the second rotation source 54 is provided with a first pulley 55, a second pulley 57 is rotatably connected to the transmission rack 53, the second pulley 57 is fixedly connected to the grinding wheel 3, and the side walls of the first pulley 55 and the second pulley 57 are jointly sleeved with a second conveyor belt 56.

[0045] The first rotation source 51 starts to drive the transmission rack 53 to move inside the workbench 1 through the driving gear 52, and the grinding wheel 3 moves synchronously with the transmission rack 53 until the grinding wheel 3 abuts against the side wall of the circuit board. The second rotation source 54 starts to drive the grinding wheel 3 to rotate through the first pulley 55, the second conveyor belt 56 and the second pulley 57 in sequence, and the driving mechanism 4 drives the circuit board to rotate through the support plate 11 and the fastening cylinder 2, so that the grinding wheel 3 grinds the side wall of the circuit board.

[0046] Reference Figure 7 A support shell 25 is sleeved on the outside of the extrusion spring 24, and the support shell 25 is slidably connected to the outer shell 21. A transmission shell 26 is slidably connected inside the support shell 25. A limit ring 262 that can abut against the inner bottom wall of the support shell 25 is fixedly connected to the top wall of the transmission shell 26, and an unlocking ring 261 is fixedly sleeved on one end of the transmission shell 26 away from the support shell 25.

[0047] Reference Figure 8 and Fig. 9The workbench 1 is fixedly connected to the third rotation source 6, the driving shaft of the third rotation source 6 is fixedly sleeved with a connecting gear 61, the workbench 1 is slidably connected to a connecting rack 62 that can mesh with the connecting gear 61, the connecting rack 62 is rotatably connected to a measuring wheel 63 that can abut against the side wall of the circuit board at one end away from the connecting gear 61, the connecting rack 62 is slidably connected to an end close to the measuring wheel 63 of the connecting rack 62, and a limiting spring 65 is arranged between the connecting rack 62 and the driving rod 64. The driving rod 64 is rotatably connected to an unlocking wheel 66 that can drive the unlocking ring 261 to move downward at one end away from the connecting rack 62, and the side wall of the unlocking wheel 66 is inclined.

[0048] Reference Figure 8 and Fig. 9 The connecting rack 62 and the transmission rack 53 are arranged at 90 degrees. Before the grinding wheel 3 abuts the side wall of the circuit board, the third rotation source 6 drives the connecting rack 62 to move close to the circuit board through the connecting gear 61, and the measuring wheel 63 moves synchronously with the connecting gear 61 to abut the side wall of the circuit board. At this time, the distance of the measuring wheel 63 to the side wall of the circuit board corresponds to the number of circles of the third rotation source 6, and an electrical signal is generated. The electrical signal is fed back to the first rotation source 51 to control the distance that the first rotation source 51 drives the grinding wheel 3 to move.

[0049] Reference Figure 6 When the cylinder rod 23 contacts the edge of the circuit board, and only a part of the bottom wall of the cylinder rod 23 contacts the circuit board, and the rest of the cylinder rod 23 is outside the circuit board, the fastening cylinder 2 will still abut against the grinding wheel 3 to cause interference. At this time, the bottom wall of the support shell 25 does not abut against the inner bottom wall of the outer shell 21, and due to the thickness of the circuit board, the second air inlet 212 is not connected to the inside of the ventilation groove 221. At this time, when the connecting rack 62 drives the measuring wheel 63 to move close to the side wall of the circuit board, the connecting rack 62 drives the unlocking wheel 66 to move close to the unlocking ring 261 through the transmission rod 64, and the side wall of the unlocking wheel 66 abuts against the side wall of the unlocking ring 261. The unlocking wheel 66 continues to move and squeezes the unlocking ring 261 downward. The unlocking ring 261 drives the support shell 25 to move downward through the transmission shell 26 and the limit ring 262, so that the bottom wall of the support shell 25 abuts against the inner bottom wall of the outer shell 21 (refer to Figure 5 ), while the supporting shell 25 is separated from the bottom wall of the inner shell 22, the extrusion spring 24 is further compressed.

[0050] Reference Figure 7At this time, the airflow input through the first air inlet 211 squeezes the inner shell 22 to move downward, and the vent 221 moves synchronously with the inner shell 22 to communicate with the inside of the second air inlet 212. As a result, the airflow in the second air inlet 212 squeezes the cylinder rod 23 to move upward, so that the cylinder rod 23 at the edge that is not completely in contact with the circuit board is separated from the circuit board. At this time, the fastening cylinder 2 is in a contracted state, further reducing the probability of interference between the fastening cylinder 2 and the grinding wheel 3 to cause working condition accidents, and improving the orderliness of the circuit board being ground. When the cylinder rod 23 moves upward, the unlocking ring 261 squeezes the unlocking wheel 66 to move away from the cylinder rod 23, and the limit spring 65 is compressed. The cylinder rod 23 continues to move upward, and the unlocking ring 261 is separated from the unlocking wheel 66.

[0051] Reference Fig.10 The side wall of the support plate 11 is provided with a plurality of transmission tooth grooves 111 along the circumferential direction. The driving mechanism 4 includes a fourth rotation source 41 fixedly connected to the side wall of the workbench 1. The driving shaft of the fourth rotation source 41 is fixedly sleeved with a transmission wheel 42. The workbench 1 is rotatably connected with a rotating rod 43. The side wall of the rotating rod 43 is fixedly sleeved with a driven wheel 44. The outer side walls of the transmission wheel 42 and the driven wheel 44 are sleeved with a first conveyor belt 45. Both ends of the rotating rod 43 are fixedly sleeved with transmission gears 46 that can mesh with the transmission tooth grooves 111.

[0052] The fourth rotation source 41 drives the transmission gear 46 to rotate around the rotating rod 43 through the transmission wheel 42, the first conveyor belt 45, the driven wheel 44 and the rotating rod 43 in sequence. The transmission gear 46 at the upper end of the rotating rod 43 is meshed with the transmission tooth groove 111 provided on the support plate 11 above the circuit board, and the transmission gear 46 at the lower end of the rotating rod 43 is meshed with the transmission tooth groove 111 provided on the support plate 11 below the circuit board, thereby driving the upper and lower support plates 11 to rotate, so that the support plate 11 drives the circuit board to rotate through the fastening cylinder 2, so that the grinding wheel 3 grinds the side wall of the circuit board.

[0053] Reference Figure 2 The support plate 11 located below is slidably connected to the support platform 7, and the support plate 11 located below is fixedly connected to a linear actuator 71 for driving the support platform 7 to move in the vertical direction. The linear actuator 71 drives the support platform 7 to move between the upper and lower tightening cylinders 2 to support the circuit board before the tightening cylinders 2 tighten the circuit board. When the circuit board is polished, the linear actuator 71 drives the support platform 7 to move downward and away from the circuit board, thereby reducing the negative interference caused by the support platform 7 to the circuit board when the circuit board is polished.

[0054] Reference Fig.11A protective shaft 28 is fixedly connected to the driving shaft of the fastening cylinder 2 on the upper side, and a protective housing 29 that can cooperate with the protective shaft 28 is fixedly connected to the driving shaft of the fastening cylinder 2 on the lower side. The protective shaft 28 and the protective housing 29 are made of soft materials to reduce the damage to the surface of the circuit board when the fastening cylinder 2 presses the circuit board. At the same time, when the cylinder rod 23 on the upper side abuts the cylinder rod 23 on the lower side, the protective shaft 28 extends into the protective housing 29 to improve the stability of the abutment between the cylinder rod 23 on the upper side and the cylinder rod 23 on the lower side.

[0055] The implementation principle of a polishing device for producing printed circuit boards in an embodiment of the present invention is as follows: a worker places the circuit board on a support table 7, and introduces airflow into the outer shell 21 through the first air inlet 211. The airflow squeezes the inner shell 22 and the cylinder rod 23 to move away from the first air inlet 211, and the cylinder rod 23 presses and fixes the circuit board. The cylinder rod 23 of the fastening cylinder 2 located outside the circuit board in the horizontal direction does not abut against the circuit board, and airflow is transported into the inner shell 22 through the second air inlet 212, and the air pressure of the airflow transported through the second air inlet 212 is greater than the air pressure of the airflow transported through the first air inlet 211, thereby the airflow in the inner shell 22 squeezes the cylinder rod 23 to move close to the first air inlet 211, so that the cylinder rod 23 that is not fastened to the circuit board is separated from the circuit board.

[0056] The transmission mechanism 5 drives the grinding wheel 3 to contact the side wall of the circuit board, the driving mechanism 4 drives the support plate 11 to rotate, and the support plate 11 drives the circuit board to rotate through the fastening cylinder 2, thereby making the grinding wheel 3 grind the side wall of the circuit board. After grinding, the staff takes out the circuit board and the fastening cylinder 2 is reset.

[0057] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A grinding device for printed circuit board production, comprising a workbench and a plurality of fastening cylinders for fastening the circuit board, characterized in that: The workbench is rotatably connected to a support plate, two support plates are arranged in the vertical direction, and a grinding wheel for grinding the side wall of the circuit board is arranged in the workbench; The fastening cylinder comprises an outer shell fixedly connected to the support plate, the outer shell is provided with a first air inlet hole and a second air inlet hole, the inner shell is slidably connected to the inner shell, the top wall of the inner shell is provided with an air delivery hole, the outer shell and the inner shell are both connected to the air delivery hole, the inner shell is provided with a venting groove that can be connected to the second air inlet hole, the inner shell is slidably connected to the cylinder rod, and a compression spring is provided between the bottom wall of the inner shell and the outer shell; The extrusion spring outer sleeve is provided with a support shell, and a transmission shell is slidably connected inside the support shell, and an unlocking ring is fixedly provided on a fixed sleeve at one end of the transmission shell away from the support shell, and the workbench is fixedly connected to a third rotation source, and a driving shaft fixed sleeve of the third rotation source is provided with a connecting gear, and the workbench is slidably connected to a connecting rack that can mesh with the connecting gear, and the connecting rack is rotatably connected to a measuring wheel, and the connecting rack is slidably connected to a transmission rod, and a limit spring is arranged between the connecting rack and the transmission rod, and the transmission rod is rotatably connected to an unlocking wheel that can drive the unlocking ring to move downward; The workbench is provided with a driving mechanism for driving the support plate to rotate and a transmission mechanism for driving the grinding wheel to abut against the side wall of the circuit board.

2. A grinding device for producing a printed circuit board according to claim 1, characterized in that: The transmission mechanism includes a first rotation source fixedly connected to the side wall of the workbench, a driving shaft fixed sleeve of the first rotation source is provided with a driving gear, the workbench is slidably connected with a transmission rack that can mesh with the driving gear, and the transmission rack is fixedly connected to a second rotation source for driving the grinding wheel to rotate at one end away from the first rotation source.

3. A grinding device for producing a printed circuit board according to claim 1, characterized in that: A supporting spring is sleeved on the side wall of the cylinder rod.

4. A grinding device for producing a printed circuit board according to claim 1, characterized in that: The side wall of the support plate is provided with a transmission tooth groove along the circumferential direction, and the driving mechanism includes a fourth rotation source fixedly connected to the side wall of the workbench, the driving shaft of the fourth rotation source is fixedly sleeved with a transmission wheel, the workbench is rotatably connected to a rotating rod, the side wall of the rotating rod is fixedly sleeved with a driven wheel, the outer side walls of the transmission wheel and the driven wheel are sleeved with a first conveyor belt, and both ends of the rotating rod are fixedly sleeved with transmission gears that can mesh with the transmission tooth groove.

5. A grinding device for producing a printed circuit board according to claim 1, characterized in that: The support plate located below is slidably connected to a support platform, and the support plate is fixedly connected to a linear driver for driving the support platform to move in a vertical direction.

6. A grinding device for producing a printed circuit board according to claim 1, characterized in that: A protection shaft is fixedly connected to the fastening cylinder drive shaft located on the upper side, and a protection shell capable of cooperating with the protection shaft is fixedly connected to the fastening cylinder drive shaft located on the lower side.

7. A grinding device for producing a printed circuit board according to claim 2, characterized in that: Valves are arranged in the first air inlet and the second air inlet.

Images