High-precision PCB resin plate grinding equipment

Abstract

The utility model discloses high-precision PCB resin plate grinding equipment, which comprises a mounting wall plate, a rack and a plurality of groups of rubber-coated rollers, the mounting wall plate is arranged on the rack, the plurality of groups of rubber-coated rollers are arranged on the mounting wall plate at intervals, a grinding brush and a back pressure wheel are arranged between every two groups of rubber-coated rollers, the grinding brushes and the back pressure wheels correspond to each other up and down, and the rubber-coated rollers are arranged on the mounting wall plate. Each group of rubber-coated rollers comprises a plurality of upper rubber-coated rollers, a plurality of lower rubber-coated rollers and a pressing device for pressing the upper rubber-coated rollers, each upper rubber-coated roller corresponds to the corresponding lower rubber-coated roller in a one-to-one manner, one end of each polish-brush is provided with a mounting seat and a V-shaped belt wheel, and the mounting seat is provided with a swinging mechanism. A servo motor of the polish-brush lifting assembly is matched with a grinding program to achieve precise up-down movement of the polish-brush, precise grinding is achieved by matching with the stability of a special widened guide rail base, meanwhile, automatic recognition and grinding of PCBs of different thicknesses are achieved by matching with a back pressure wheel capable of moving up and down, and the advantages of being high in automation degree, precise in grinding, high in efficiency and the like are achieved. And the effect is stable.

Description

Technical Field

[0001] This utility model relates to PCB processing equipment, and in particular to a high-precision PCB resin board grinding equipment. Background Technology

[0002] In the PCB manufacturing process, resin PCBs are usually plugged after processes such as CNC drilling and copper plating. The resin produced by plugging often overflows from the holes and exists in the form of clumps. Traditional grinding machines usually cannot completely remove it or the removal and grinding of the PCB afterward will cause uneven copper thickness on the surface.

[0003] Currently, traditional PCB grinding equipment uses transmission rollers to grind the circuit boards. These rollers include a grinding brush and parallel wheels. However, grinding can only occur in the conveying direction of the PCB board, not along the axial direction of the brush, resulting in uneven grinding of the PCB surface and affecting the appearance and grinding quality of the circuit board. Therefore, this invention provides a high-precision PCB resin board grinding device that improves the stability and precision of the grinding process, solving the problems of resin PCB board grinding that are difficult to address with traditional grinding machines. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a high-precision PCB resin board grinding equipment.

[0005] The objective of this utility model is achieved through the following technical solution: a high-precision PCB resin board grinding equipment, comprising a mounting wall plate, a frame, and multiple sets of coating rollers. The mounting wall plate is mounted on the frame, and the multiple sets of coating rollers are arranged at intervals on the mounting wall plate. A grinding brush and a back pressure roller are provided between every two sets of coating rollers, with the grinding brush and the back pressure roller corresponding vertically. Each set of coating rollers includes multiple upper coating rollers, multiple lower coating rollers, and a pressing device for pressing the upper coating rollers. Each upper coating roller corresponds one-to-one with each lower coating roller. Each grinding brush has a mounting base and a V-belt pulley at one end. The mounting base is provided with a swing mechanism, and the V-belt pulley is driven by the grinding brush via a belt. The frame is provided with multiple grinding brush lifting mechanisms, with every two grinding brush lifting mechanisms controlling the lifting of one grinding brush. Each lower coating roller has a first helical tooth at one end and a gear at the other end, with adjacent lower coating rollers being driven by gear meshing.

[0006] As an improvement to the high-precision PCB resin board grinding equipment of this utility model, it also includes a through-shaft main drive shaft, which is disposed on the outside of the mounting wall plate. The through-shaft main drive shaft is provided with a second helical tooth corresponding to the position of each of the first helical teeth, and the second helical tooth meshes with the first helical tooth for transmission. One end of the through-shaft main drive shaft is connected to the output shaft of the conveying motor.

[0007] As an improvement to the high-precision PCB resin board grinding equipment of this utility model, a thickness detection device is also included. The thickness detection device is disposed at the exit end of the mounting wall plate. The thickness detection device includes two parallel mounting side plates and a thickness measuring wheel and a rotating shaft disposed on the two mounting side plates. The rotating shaft is located below the thickness measuring wheel. One end of the rotating shaft is provided with a first synchronous pulley, which is connected to a second synchronous pulley via a synchronous belt. An encoder is provided on one side of the second synchronous pulley. The other end of the rotating shaft is controlled to rotate by a drive motor. The two ends of the thickness measuring wheel and the two ends of the rotating shaft are connected by a connecting block. The principle of the thickness detection device is that when there is a PCB resin board below the thickness measuring wheel, the thickness measuring wheel is raised. The raising of the thickness measuring wheel drives the rotating shaft to rotate by an angle via the connecting block, and this angle is amplified by the synchronous pulley. The thickness of the PCB resin board is measured by the encoder output value corresponding to the angle of rotation of the rotating shaft.

[0008] As an improvement of the high-precision PCB resin board grinding equipment of this utility model, each of the grinding brush lifting mechanisms includes two guide rail mounting plates and a lead screw seat disposed on the outside of the mounting wall plate. The two sides of the lead screw seat are slidably connected to the guide rail mounting plates through cross guide rails. A lead screw sleeve is provided at the bottom of the lead screw seat, and a connecting seat is provided at the upper end of the lead screw seat. The connecting seat is connected to a second mounting seat through a slide rail and a slider. The second mounting seat is connected to the end of the grinding brush. A lifting lead screw is screwed into the lead screw sleeve. One end of the lifting lead screw is connected to a worm gear drive, and the worm gear drive has a lifting drive control transmission.

[0009] The brush lifting mechanism controls the brush to perform vertical reciprocating motion above or below the back pressure roller.

[0010] As an improvement to the high-precision PCB resin board grinding equipment of this utility model, it also includes a spray assembly, which is disposed on both sides of each of the grinding brushes and the direction of the spray assembly is toward the grinding gap between the grinding brush and the PCB resin board.

[0011] As an improvement to the high-precision PCB resin board grinding equipment of this utility model, the grinding brush has four parts, namely a first grinding brush, a second grinding brush, a third grinding brush, and a fourth grinding brush, and the back pressure roller has four parts, namely a first back pressure roller, a second back pressure roller, a third back pressure roller, and a fourth back pressure roller. The first back pressure roller is located directly above the first grinding brush, the second back pressure roller is located directly below the second grinding brush, the third back pressure roller is located directly below the third grinding brush, and the fourth back pressure roller is located directly above the fourth grinding brush. The first back pressure roller and the fourth back pressure roller are floating back pressure rollers and can move up and down. The second back pressure roller and the third back pressure roller are fixed back pressure rollers. The first back pressure roller, the second back pressure roller, the third back pressure roller, and the fourth back pressure roller are all driven to rotate.

[0012] As an improvement of the high-precision PCB resin board grinding equipment of this utility model, the clamping device includes two spaced positioning seats, and a positioning plate is installed on the upper end of the two positioning seats. Multiple pressure rods are spaced apart on the positioning plate, and a pressure spring is sleeved on each pressure rod. A pressure block is provided at the bottom of the pressure rod. The lower end of the pressure spring abuts against the pressure block, and the other end abuts against the positioning plate. One end of the upper rubber-coated roller passes through the pressure block.

[0013] As an improvement of the high-precision PCB resin board grinding equipment of this utility model, the swing mechanism includes a swing device base plate. The bottom of the mounting base is slidably connected to the swing device base plate through a slide rail and a slider. The swing device base plate is provided with a swing control mechanism for controlling the grinding brush to swing along the axial direction.

[0014] The rocking control mechanism includes a rocking eccentric shaft. Eccentric shaft mounting seats are provided on both sides of the rocking device base plate. The rocking eccentric shaft passes through the two eccentric shaft mounting seats and an eccentric shaft bearing is provided at the connection between the rocking eccentric shaft and the eccentric shaft mounting seats.

[0015] As an improvement to the high-precision PCB resin board grinding equipment of this utility model, the swing control mechanism further includes a swing arm. One end of the swing arm is provided with a left swing arm bearing and a right swing arm bearing. A connecting shaft passes through the left swing arm bearing. One end of the connecting shaft is mounted on a connecting plate. The connecting plate is connected to one side of the mounting base. The right swing arm bearing is connected to one end of the swing eccentric shaft. The other end of the swing eccentric shaft is provided with a first synchronous pulley and a swing shaft spacer. The swing shaft spacer is located between the first synchronous pulley and the eccentric shaft mounting base.

[0016] As an improvement of the high-precision PCB resin board grinding equipment of this utility model, the swing control mechanism further includes a swing motor base plate, which is installed on one side of the swing device base plate. A swing motor is fixedly installed on the swing motor base plate, and a second synchronous pulley is provided on the output shaft of the swing motor. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt.

[0017] The swing motor drives the rotation of the swing eccentric shaft via a synchronous belt and synchronous pulley. The rotation of the swing eccentric shaft drives the swing arm to swing, and the swing arm swings the brush along the axial direction. A swing sliding mechanism, consisting of the swing eccentric shaft, the swing arm, and the linear slider, enables the brush to move back and forth along a straight line. The swing device base plate fixes the swing eccentric shaft and the linear slider. The linear slider houses the brush bearing seat and its components. The swing eccentric shaft, the swing arm, and the connecting seat are all connected by bearings. The power to the swing shaft is transmitted by a small motor through two synchronous pulleys of different sizes.

[0018] The beneficial effects of this utility model are as follows: The servo motor of the grinding brush lifting assembly of this utility model, in conjunction with the grinding program, realizes the precise up and down movement of the grinding brush. Combined with the stability of the specially widened guide rail seat, it achieves precision grinding. At the same time, in conjunction with the up and down movable back pressure roller, the equipment can automatically identify and grind PCB boards of different thicknesses. And through the program, in conjunction with the diamond brush plate, it realizes the automatic repair of the grinding brush. It has the advantages of high automation, precision grinding, and stable effect. Attached Figure Description

[0019] Figure 1 This is a perspective view of this utility model from one direction;

[0020] Figure 2 This is a perspective view of the present invention from another angle;

[0021] Figure 3 This is an internal side view of the present invention;

[0022] Figure 4 This is a utility model Figure 2 Enlarged view of point A in the image;

[0023] Figure 5 This is a schematic diagram of the swing mechanism and brush installation structure of this utility model;

[0024] Figure 6 This is an exploded view of the swing mechanism of this utility model;

[0025] Figure 7 This is a front view of the swing mechanism and the brush after installation.

[0026] Figure 8 This is a utility model Figure 1 Enlarged view of point B in the image. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] like Figures 1-8 As shown, a high-precision PCB resin board grinding equipment includes a mounting wall plate 1, a frame 2, and multiple sets of coating rollers 3. The mounting wall plate 1 is mounted on the frame 2, and the multiple sets of coating rollers 3 are arranged at intervals on the mounting wall plate 1. A grinding brush 4 and a back pressure roller 5 are provided between every two sets of coating rollers 3. The grinding brush 4 and the back pressure roller 5 are arranged vertically and vertically. Each set of coating rollers 3 includes multiple upper coating rollers 31, multiple lower coating rollers 32, and a clamping device 33 for pressing the upper coating rollers 31. Each upper coating roller... The rubber roller 31 and the lower rubber-coated roller 32 are in one-to-one correspondence. Each brush 4 has a mounting base 41 and a V-belt pulley 42 at one end. The mounting base 41 is equipped with a swing mechanism 6. The V-belt pulley 42 is connected to the brush drive 44 through a belt 43. The frame 2 is equipped with multiple brush lifting mechanisms 7. Every two brush lifting mechanisms 7 control the lifting of one brush 4. Each lower rubber-coated roller 32 has a first helical tooth 34 at one end and a gear at the other end. Two adjacent lower rubber-coated rollers 32 are driven by gear meshing.

[0031] Preferably, it also includes a through-shaft main drive shaft 8, which is disposed on the outside of the mounting wall plate 1. The through-shaft main drive shaft 8 is provided with a second helical tooth 81 corresponding to each position of the first helical tooth 34. The second helical tooth 81 meshes with the first helical tooth 34 for transmission. One end of the through-shaft main drive shaft 8 is connected to the output shaft of the conveying motor 82.

[0032] Preferably, the device further includes a thickness detection device 9, which is disposed at the exit end of the mounting wall panel 1. The thickness detection device 9 includes two parallel mounting side plates 91, a thickness measuring wheel 92 and a rotating shaft 93 disposed on the two mounting side plates 91. The rotating shaft 93 is located below the thickness measuring wheel 92. One end of the rotating shaft 93 is provided with a first synchronous pulley 94, which is connected to a second synchronous pulley 96 via a synchronous belt 95. An encoder 97 is provided on one side of the second synchronous pulley 96. The other end of the rotating shaft 93 is controlled to rotate by a drive motor. The two ends of the thickness measuring wheel 92 and the two ends of the rotating shaft 93 are connected by a connecting block. The principle of the thickness detection device is that when there is a PCB resin board below the thickness measuring wheel 92, the thickness measuring wheel 92 is raised. The raising of the thickness measuring wheel 92 drives the rotating shaft 93 to rotate by an angle through the connecting block. This angle is then amplified by the synchronous pulley. The thickness of the PCB resin board is measured by the encoder output value corresponding to the angle of rotation of the rotating shaft 93.

[0033] Preferably, each brush lifting mechanism 7 includes two guide rail mounting plates 71 and a lead screw seat 72 disposed on the outside of the mounting wall plate 1. The two sides of the lead screw seat 72 are slidably connected to the guide rail mounting plates 71 through cross guide rails 73. The bottom of the lead screw seat 72 is provided with a lead screw sleeve 74, and the upper end of the lead screw seat 72 is provided with a connecting seat 75. The connecting seat 75 is connected to a second mounting seat 76 through a slide rail and a slider. The second mounting seat 76 is connected to the end of the brush 4. A lifting lead screw 77 is screwed into the lead screw sleeve 74. One end of the lifting lead screw 77 is connected to a worm gear drive 78. The worm gear drive 78 has a lifting drive control transmission.

[0034] The brush lifting mechanism 7 controls the brush 4 to make vertical reciprocating motion above or below the back pressure roller 5.

[0035] Preferably, it also includes a spray assembly 10, which is disposed on both sides of each brush 4, and the direction of the spray assembly 10 is toward the grinding gap between the brush 10 and the PCB resin board.

[0036] Preferably, there are four grinding brushes 4, namely a first grinding brush 401, a second grinding brush 402, a third grinding brush 403, and a fourth grinding brush 404. There are four back pressure rollers 5, namely a first back pressure roller 51, a second back pressure roller 52, a third back pressure roller 53, and a fourth back pressure roller 54. The first back pressure roller 51 is located directly above the first grinding brush 401, the second back pressure roller 52 is located directly below the second grinding brush 402, the third back pressure roller 53 is located directly below the third grinding brush 403, and the fourth back pressure roller 54 is located directly above the fourth grinding brush 404. The first back pressure roller 51 and the fourth back pressure roller 54 are floating back pressure rollers and can move up and down. The second back pressure roller 52 and the third back pressure roller 53 are fixed back pressure rollers. The first back pressure roller 51, the second back pressure roller 52, the third back pressure roller 53, and the fourth back pressure roller 54 are all rotated by drive control.

[0037] Preferably, the clamping device 33 includes two spaced positioning seats 331, and a positioning plate 332 is installed on the upper end of the two positioning seats 331. Multiple pressure rods 333 are spaced on the positioning plate 332, and a clamping spring 334 is sleeved on each pressure rod 333. A pressure block 335 is provided at the bottom of the pressure rod 333. The lower end of the clamping spring 334 abuts against the pressure block 335, and the other end abuts against the positioning plate 332. One end of the upper rubber-coated roller 31 passes through the pressure block 335.

[0038] Preferably, the rocking mechanism 6 includes a rocking device base plate 61, and the bottom of the mounting base 41 is slidably connected to the rocking device base plate 61 via a slide rail and a slider. The rocking device base plate 61 is provided with a rocking control mechanism for controlling the brush to swing along the axial direction.

[0039] The swing control mechanism includes a swing eccentric shaft 62. Eccentric shaft mounting seats 63 are provided on both sides of the swing device base plate 61. The swing eccentric shaft 62 passes through the two eccentric shaft mounting seats 63, and an eccentric shaft bearing 64 is provided at the connection between the swing eccentric shaft 62 and the eccentric shaft mounting seats 63.

[0040] Preferably, the swing control mechanism further includes a swing arm 65, one end of which is provided with a left swing arm bearing 66 and a right swing arm bearing 67. A connecting shaft passes through the left swing arm bearing 66, one end of which is mounted on a connecting plate 68. The connecting plate 68 is connected to one side of the mounting base 41. The right swing arm bearing 67 is connected to one end of the swing eccentric shaft 62. The other end of the swing eccentric shaft 62 is provided with a third synchronous pulley 69 and a swing shaft spacer 60. The swing shaft spacer 60 is located between the third synchronous pulley 69 and the eccentric shaft mounting base 63.

[0041] Preferably, the swing control mechanism further includes a swing motor base plate 601, which is installed on one side of the swing device base plate 61. A swing motor 602 is fixedly installed on the swing motor base plate 601. A fourth synchronous pulley 603 is provided on the output shaft of the swing motor 602. A third synchronous pulley 69 and the fourth synchronous pulley 603 are connected by a second synchronous belt 604. The diameter of the third synchronous pulley 69 is larger than the diameter of the fourth synchronous pulley 603.

[0042] The oscillating motor 602 drives the rotation of the oscillating eccentric shaft 62 via a synchronous belt and synchronous pulley. The rotation of the oscillating eccentric shaft 62 drives the oscillating arm 65 to oscillate, and the oscillation of the oscillating arm 65 drives the grinding brush 4 to oscillate along the axial direction. Through the oscillating sliding mechanism that cooperates with the oscillating eccentric shaft 62, the oscillating arm 65, and the linear slider, the grinding brush can move back and forth in a straight line. The oscillating device base plate 61 fixes the oscillating eccentric shaft and the linear slider. The linear slider has a grinding brush bearing seat and its components. The oscillating eccentric shaft 62, the oscillating arm 65, and the connecting seat are all connected by bearings. The power of the oscillating shaft is transmitted by a small motor through two synchronous pulleys of different sizes.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and structure of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision PCB resin board grinding equipment, characterized in that, The system includes a mounting wall panel, a frame, and multiple sets of rubber-coated rollers. The mounting wall panel is mounted on the frame, and the multiple sets of rubber-coated rollers are arranged at intervals on the mounting wall panel. Between every two sets of rubber-coated rollers, there is a grinding brush and a back pressure roller. The grinding brush and the back pressure roller are vertically aligned. Each set of rubber-coated rollers includes multiple upper rubber-coated rollers, multiple lower rubber-coated rollers, and a clamping device for pressing the upper rubber-coated rollers. Each upper rubber-coated roller corresponds one-to-one with each lower rubber-coated roller. Each grinding brush has a mounting base and a V-belt pulley at one end. The mounting base is equipped with a swing mechanism, and the V-belt pulley is connected to the grinding brush drive via a belt. The frame is equipped with multiple grinding brush lifting mechanisms, and every two grinding brush lifting mechanisms control the lifting of one grinding brush. Each lower rubber-coated roller has a first helical tooth at one end and a gear at the other end. Adjacent lower rubber-coated rollers are driven by gear meshing.

2. The high-precision PCB resin board grinding equipment according to claim 1, characterized in that, It also includes a through-shaft main drive shaft, which is disposed on the outside of the mounting wall panel. The through-shaft main drive shaft is provided with a second helical tooth corresponding to the position of each of the first helical teeth, and the second helical tooth meshes with the first helical tooth for transmission. One end of the through-shaft main drive shaft is connected to the output shaft of the conveyor motor.

3. The high-precision PCB resin board grinding equipment according to claim 1, characterized in that, It also includes a thickness detection device, which is disposed at the protruding end of the mounting wall panel. The thickness detection device includes two parallel mounting side plates and a thickness measuring wheel and a rotating shaft disposed on the two mounting side plates. The rotating shaft is located to the side of the thickness measuring wheel. One end of the rotating shaft is provided with a first synchronous pulley, which is connected to a second synchronous pulley via a synchronous belt. An encoder is provided on one side of the second synchronous pulley. The other end of the rotating shaft is controlled to rotate by a drive motor. The two ends of the thickness measuring wheel and the two ends of the rotating shaft are connected by a connecting block.

4. The high-precision PCB resin board grinding equipment according to claim 1, characterized in that, Each of the aforementioned brush lifting mechanisms includes two guide rail mounting plates and a lead screw seat disposed on the outer side of the mounting wall panel. The two sides of the lead screw seat are slidably connected to the guide rail mounting plates via cross guide rails. A lead screw sleeve is provided at the bottom of the lead screw seat, and a connecting seat is provided at the upper end of the lead screw seat. The connecting seat is connected to a second mounting seat via a slide rail and a slider. The second mounting seat is connected to the end of the brush. A lifting lead screw is screwed into the lead screw sleeve. One end of the lifting lead screw is connected to a worm gear drive, and the worm gear drive has lifting drive control transmission. The brush lifting mechanism controls the brush to make vertical reciprocating motion above or below the back pressure roller.

5. The high-precision PCB resin board grinding equipment according to claim 1, characterized in that, It also includes a spray assembly disposed on both sides of each of the grinding brushes, the spray assembly being directed toward the grinding gap between the grinding brush and the PCB resin board.

6. The high-precision PCB resin board grinding equipment according to claim 1, characterized in that, The grinding brush has four parts: a first grinding brush, a second grinding brush, a third grinding brush, and a fourth grinding brush. The back pressure roller has four parts: a first back pressure roller, a second back pressure roller, a third back pressure roller, and a fourth back pressure roller. The first back pressure roller is located directly above the first grinding brush, the second back pressure roller is located directly below the second grinding brush, the third back pressure roller is located directly below the third grinding brush, and the fourth back pressure roller is located directly above the fourth grinding brush. The first and fourth back pressure rollers are floating back pressure rollers, capable of moving up and down. The second and third back pressure rollers are fixed back pressure rollers. All four back pressure rollers are rotated via a drive control mechanism.

7. The high-precision PCB resin board grinding equipment according to claim 1, characterized in that, The clamping device includes two spaced-apart positioning seats. A positioning plate is mounted on the upper end of the two positioning seats. Multiple pressure rods are spaced apart on the positioning plate. Each pressure rod is fitted with a pressure spring. A pressure block is provided at the bottom of the pressure rod. The lower end of the pressure spring abuts against the pressure block, and the other end abuts against the positioning plate. One end of the upper rubber-coated roller passes through the pressure block.

8. The high-precision PCB resin board grinding equipment according to claim 1, characterized in that, The swing mechanism includes a swing device base plate. The bottom of the mounting base is slidably connected to the swing device base plate via a slide rail and a slider. The swing device base plate is provided with a swing control mechanism for controlling the brush to swing along the axial direction. The rocking control mechanism includes a rocking eccentric shaft. Eccentric shaft mounting seats are provided on both sides of the rocking device base plate. The rocking eccentric shaft passes through the two eccentric shaft mounting seats and an eccentric shaft bearing is provided at the connection between the rocking eccentric shaft and the eccentric shaft mounting seats.

9. The high-precision PCB resin board grinding equipment according to claim 8, characterized in that, The swing control mechanism also includes a swing arm, one end of which is provided with a left swing arm bearing and a right swing arm bearing. A connecting shaft passes through the left swing arm bearing, one end of which is mounted on a connecting plate. The connecting plate is connected to one side of the mounting base. The right swing arm bearing is connected to one end of the swing eccentric shaft. The other end of the swing eccentric shaft is provided with a first synchronous pulley and a swing shaft spacer. The swing shaft spacer is located between the first synchronous pulley and the eccentric shaft mounting base.

10. The high-precision PCB resin board grinding equipment according to claim 9, characterized in that, The swing control mechanism also includes a swing motor base plate, which is installed on one side of the swing device base plate. A swing motor is fixedly installed on the swing motor base plate, and a second synchronous pulley is provided on the output shaft of the swing motor. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt. The swing motor drives the rotation of the swing eccentric shaft via a synchronous belt and a synchronous pulley. The rotation of the swing eccentric shaft drives the swing arm to swing, and the swing of the swing arm drives the brush to swing along the axial direction.

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