PCB copper surface grinding machine

Abstract

The utility model discloses a PCB (printed circuit board) copper surface grinding machine, which relates to the technical field of PCB processing and comprises a workbench, a first moving mechanism, a second moving mechanism, a grinding mechanism and a visual identification control mechanism. The first moving mechanism is arranged on the workbench, the output end of the first moving mechanism is connected with a positioning jig, and the first moving mechanism is used for driving the positioning jig to move in the front-back direction; the second moving mechanism is arranged on the workbench; the grinding mechanism is connected to the output end of the second moving mechanism, and the second moving mechanism is used for driving the grinding mechanism to move in the left-right direction and the up-down direction; and the visual identification control mechanism is used for identifying a defective area on the copper surface of the PCB on the positioning jig, so that the polishing mechanism can polish the defective area on the copper surface of the PCB on the positioning jig. The PCB copper surface grinding machine can grind a plurality of local defective areas on the PCB copper surface, so that non-defective areas on the PCB copper surface cannot be ground, and the performance and the quality of the PCB are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to PCB processing technical field, especially relate to a PCB copper surface polisher. BACKGROUND

[0002] In the manufacturing process of PCB, the local of PCB copper surface will appear electroplating rough, resin plug hole after board surface grinding is not clean, copper surface oxidation and so on, therefore in order to guarantee the quality of PCB product, need to polish the copper surface of PCB to solve the above problems. In the prior art, the copper surface of PCB is polished by using a polisher. But the traditional polisher adopts the whole plate polishing mode, and this polishing mode makes the copper surface of the whole PCB bear the same intensity polishing even if only the local area has defects, leading to the copper layer of non-defect area being over-worn, and further leading to the copper surface of PCB being thinned as a whole, which affects the performance and quality of PCB. SUMMARY

[0003] The utility model discloses at least one of the prior art problems. Therefore, the utility model provides a PCB copper surface polisher, which is beneficial to guarantee the performance and quality of PCB.

[0004] The PCB copper surface polisher according to the utility model embodiment comprises a workbench, a first moving mechanism, a second moving mechanism, a polishing mechanism and a visual identification control mechanism.

[0005] The first moving mechanism is arranged on the workbench, the output end of the first moving mechanism is connected with a positioning jig, the positioning jig is used for positioning a PCB, and the first moving mechanism is used for driving the positioning jig to move in the front-rear direction. The second moving mechanism is arranged on the workbench. The polishing mechanism is connected to the output end of the second moving mechanism, and the second moving mechanism is used for driving the polishing mechanism to move in the left-right direction and the up-down direction. The visual identification control mechanism is electrically connected with the first moving mechanism and the second moving mechanism, the visual identification control mechanism is used for identifying the defect area on the copper surface of the PCB on the positioning jig, and the first moving mechanism and the second moving mechanism are controlled to start, so that the polishing mechanism can polish the defect area on the copper surface of the PCB on the positioning jig.

[0006] At least has the following beneficial effects:

[0007] When the copper surface of the PCB needs to be polished, the operator can place the PCB on the positioning jig. After the PCB is placed on the positioning jig, the visual recognition control mechanism can recognize the defect area on the copper surface of the PCB on the positioning jig and control the first moving mechanism and the second moving mechanism to start. The first moving mechanism can drive the positioning jig and the PCB on the positioning jig to move in the front-rear direction, and the second moving mechanism can drive the polishing mechanism to move in the left-right direction and the up-down direction, so that the polishing mechanism can be close to and abut on the defect area on the copper surface of the PCB. Then the polishing mechanism starts, so that the polishing mechanism can polish the defect area on the copper surface of the PCB. After one defect area is polished, the first moving mechanism continues to drive the positioning jig to move in the front-rear direction, and the second moving mechanism continues to drive the polishing mechanism to move in the left-right direction and the up-down direction, so that the polishing mechanism can polish the next defect area on the copper surface of the PCB. In this way, the polishing mechanism can polish all the defect areas on the copper surface of the PCB to eliminate the defects on the copper surface of the PCB. The PCB copper surface polishing machine can polish multiple local defect areas on the copper surface of the PCB, eliminate the whole polishing method, so that the non-defect area on the copper surface of the PCB will not be polished, and the copper surface of the PCB will not be thinned as a whole, so as to be beneficial to the performance and quality of the PCB.

[0008] The PCB copper surface polishing machine further comprises a first sliding rail and a first sliding block, the first sliding rail is parallel to the front-rear direction, the first sliding rail is arranged on the workbench, and the first sliding block is arranged on the positioning jig and connected to the first sliding rail in a sliding manner.

[0009] The first moving mechanism comprises a first screw rod, a first nut and a first motor, both ends of the first screw rod in the front-rear direction are rotatably connected to the workbench, the first nut is threadedly connected to the first screw rod, the first nut is connected to the positioning jig, and the output end of the first motor is connected to the first screw rod.

[0010] The positioning jig comprises an electromagnet platform, the electromagnet platform is connected to the output end of the first moving mechanism, and the electromagnet platform can magnetically attract the PCB.

[0011] The second moving mechanism comprises a left-right moving assembly and an up-down moving assembly, the left-right moving assembly is used for driving the polishing mechanism to move in the left-right direction, and the up-down moving assembly is used for driving the polishing mechanism to move in the up-down direction.

[0012] According to the PCB copper surface polisher provided in the embodiment of the present application, the second moving mechanism further comprises a support, the support is arranged on the workbench, the left-right moving assembly comprises a second screw rod, a second nut, a second motor and a second sliding plate, the left and right ends of the second screw rod are both rotationally connected to the support, the second nut is threadedly connected with the second screw rod, the second motor is arranged on the support, the output end of the second motor is connected with the second screw rod, the second sliding plate is slidably connected to the support in the left-right direction, the second sliding plate is connected with the second nut, the up-down moving assembly is arranged on the second sliding plate, the output end of the up-down moving assembly is connected with the polishing mechanism, and the second motor can drive the second screw rod to rotate, so that the second sliding plate drives the up-down moving assembly and the polishing mechanism to move in the left-right direction.

[0013] According to the PCB copper surface polisher provided in the embodiment of the present application, the up-down moving assembly comprises a third screw rod, a third nut, a third motor and a third sliding plate, the upper and lower ends of the third screw rod are both rotationally connected to the second sliding plate, the third nut is threadedly connected with the third screw rod, the third motor is arranged on the second sliding plate, the output end of the third motor is connected with the third screw rod, the third sliding plate is slidably connected to the second sliding plate in the up-down direction, the third sliding plate is connected with the third nut, the polishing mechanism is arranged on the third sliding plate, and the third motor can drive the third screw rod to rotate, so that the third sliding plate drives the polishing mechanism to move in the up-down direction.

[0014] According to the PCB copper surface polisher provided in the embodiment of the present application, the polishing mechanism comprises a mounting frame, a fourth motor, a polishing head and a transmission assembly, the mounting frame is arranged on the third sliding plate, the fourth motor is arranged on the mounting frame, the polishing head is rotationally connected to the mounting frame, and the fourth motor is in transmission connection with the polishing head through the transmission assembly, so that the fourth motor can drive the polishing head to rotate.

[0015] According to the PCB copper surface polisher provided in the embodiment of the present application, the transmission assembly comprises a driving gear and a driven gear, the driven gear is rotationally connected to the mounting frame and connected with the polishing head, the driving gear is connected with the output end of the fourth motor, and the driving gear and the driven gear are in meshing connection.

[0016] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0018] Figure 1 It is the structural schematic view of the PCB copper surface polisher of the embodiment of the utility model;

[0019] Figure 2 It is the structural schematic view of the positioning fixture and the first moving mechanism in the PCB copper surface polisher;

[0020] Figure 3 It is the structural schematic view of the polishing mechanism in the PCB copper surface polisher;

[0021] Figure 4 It is the structural schematic view of the second moving mechanism in the PCB copper surface polisher;

[0022] Reference numerals:

[0023] The first moving mechanism 100;First screw rod 110;First motor 120;First sliding rail 130;First sliding block 140;

[0024] The second moving mechanism 200;Left and right moving assembly 210;Second sliding plate 211;Up and down moving assembly 220;Third sliding plate 221;

[0025] Positioning fixture 300;

[0026] Polishing mechanism 400;Mounting bracket 410;Fourth motor 420;Polishing head 430;Transmission assembly 440;Driving gear 441;Driven gear 442;

[0027] Visual identification control mechanism 500;Visual camera 510;

[0028] Workbench 600. Specific implementation

[0029] In the description of the utility model, it needs to be understood that, if the direction description, such as the direction or position relationship indicated by up, down, front, back, left, right etc. for the direction or position relationship shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and is not the indication or implicit indication of the device or element must have a particular orientation, a particular orientation and operation, therefore it can not be understood as the limitation of the utility model.

[0030] In the description of the utility model, if the first, second is described for the purpose of distinguishing technical features, it can not be understood as the indication or implicit indication of relative importance or the number of indicated technical features or the implicit indication of the order of indicated technical features.

[0031] In the description of the utility model, unless otherwise expressly limited, the words such as setting, installation, connection should be understood broadly, and the specific meaning of the above words in the utility model can be determined by the person skilled in the art in combination with the specific content of the technical scheme.

[0032] Reference Figures 1 to 4 The utility model discloses a kind of PCB copper surface polishing machines, including workbench 600, first mobile mechanism 100, second mobile mechanism 200, polishing mechanism 400 and visual identification control mechanism 500.

[0033] First mobile mechanism 100 is located on workbench 600, and the output end of first mobile mechanism 100 is connected with positioning fixture 300, and positioning fixture 300 is used to position PCB, and first mobile mechanism 100 is used to drive positioning fixture 300 to move along front-back direction;Second mobile mechanism 200 is located on workbench 600;Polishing mechanism 400 is connected on the output end of second mobile mechanism 200, and second mobile mechanism 200 is used to drive polishing mechanism 400 to move along left-right direction and up-down direction;Visual identification control mechanism 500 is electrically connected with first mobile mechanism 100 and second mobile mechanism 200, and visual identification control mechanism 500 is used to identify the defect area on the copper surface of PCB on positioning fixture 300, and control first mobile mechanism 100 and second mobile mechanism 200 start, so that polishing mechanism 400 can polish the defect area on the copper surface of PCB on positioning fixture 300.

[0034] It can be understood that when the copper surface of the PCB needs to be polished, the operator can place the PCB on the positioning jig 300. After the PCB is placed on the positioning jig 300, the visual recognition control mechanism 500 can recognize the defect area on the copper surface of the PCB on the positioning jig 300, and control the first moving mechanism 100 and the second moving mechanism 200 to start. The first moving mechanism 100 can drive the positioning jig 300 and the PCB on the positioning jig 300 to move in the front-back direction, and the second moving mechanism 200 can drive the polishing mechanism 400 to move in the left-right direction and the up-down direction, so that the polishing mechanism 400 can be close to and abut on the defect area on the copper surface of the PCB. Then the polishing mechanism 400 starts, so that the polishing mechanism 400 can polish the defect area on the copper surface of the PCB. After one defect area is polished, the first moving mechanism 100 continues to drive the positioning jig 300 to move in the front-back direction, and the second moving mechanism 200 continues to drive the polishing mechanism 400 to move in the left-right direction and the up-down direction, so that the polishing mechanism 400 can polish the next defect area on the copper surface of the PCB. In this way, the polishing mechanism 400 can polish all the defect areas on the copper surface of the PCB to eliminate the defects on the copper surface of the PCB. The PCB copper surface polishing machine can polish multiple local defect areas on the copper surface of the PCB, eliminate the whole polishing method, so that the non-defect area on the copper surface of the PCB will not be polished, avoid the copper surface of the PCB being thinned as a whole, and thus be beneficial to the performance and quality of the PCB.

[0035] It needs to be explained that the PCB (Printed Circuit Board) is a printed circuit board. As an embodiment of the utility model, the visual identification control mechanism 500 includes a visual camera 510, an image processing unit and a control unit. The visual camera 510 is arranged on the workbench 600 and located above the positioning jig 300, and the visual camera 510 can shoot a photo of the PCB copper surface on the positioning jig 300. The image processing unit receives the image data transmitted by the visual camera 510, and uses image processing algorithms such as edge detection, feature extraction, pattern recognition, etc. to analyze and process the image, so as to determine various defect types including roughness, scratches, oxidation, depression, etc. and determine the specific position and range of the defect area. The control unit generates corresponding control instructions according to the defect area information identified by the image processing unit. The control unit is connected with the first moving mechanism 100 and the second moving mechanism 200 through an electrical circuit, and can accurately transmit the control instructions to the two moving mechanisms. When the control unit issues an instruction, the first moving mechanism 100 drives the positioning jig 300 to move in the front-back direction according to the instruction, so as to adjust the defect area on the PCB copper surface to a suitable position; at the same time, the second moving mechanism 200 drives the polishing mechanism 400 to move in the left-right direction and the up-down direction according to the instruction, so that the polishing mechanism 400 can accurately align the defect area, and then the polishing mechanism 400 can polish the multiple defect areas on the PCB copper surface in turn.

[0036] Reference Figure 2 The PCB copper surface polishing machine further comprises a first sliding rail 130 and a first sliding block 140, the first sliding rail 130 is parallel to the front-back direction, the first sliding rail 130 is arranged on the workbench 600, and the first sliding block 140 is arranged on the positioning jig 300 and is slidably connected to the first sliding rail 130. It can be understood that the PCB copper surface polishing machine comprises two first sliding rails 130 and two first sliding blocks 140, the two first sliding rails 130 are arranged on the workbench 600, the two first sliding blocks 140 are arranged on the positioning jig 300, and the two first sliding blocks 140 are slidably connected to the two first sliding rails 130 respectively, so that the positioning jig 300 can stably slide on the workbench 600 in the front-back direction. The first moving mechanism 100 comprises a first lead screw 110, a first nut and a first motor 120, both ends of the first lead screw 110 in the front-back direction are rotatably connected to the workbench 600, the first nut is threadedly connected with the first lead screw 110, the first nut is connected with the positioning jig 300, and the output end of the first motor 120 is connected with the first lead screw 110. The first motor 120 can drive the first lead screw 110 to rotate, so as to move the positioning jig 300 in the front-back direction. It can be understood that the first motor 120 drives the first lead screw 110 to rotate, so that the first nut can move along the length direction of the first lead screw 110, and then the first nut can drive the positioning jig 300 and the PCB on the positioning jig 300 to move in the front-back direction.

[0037] In the embodiment of the utility model, the positioning jig 300 includes an electromagnet platform, the electromagnet platform is connected with the output end of the first moving mechanism 100, and the electromagnet platform can magnetically attract the PCB. After the PCB is placed on the electromagnet platform, the electromagnet platform can generate a magnetic attraction force, so that the PCB can be stably attracted on the electromagnet platform, to ensure that the PCB does not move in position relative to the electromagnet platform during movement, and ensure that the polishing mechanism 400 can accurately polish the multiple defect areas on the copper surface of the PCB. Specifically, the electromagnet platform includes an electromagnetic coil, a core, an insulating shell and a power supply control module, the electromagnetic coil is wound on the core, and the insulating shell encapsulates the electromagnetic coil and the core. When the PCB is placed on the surface of the electromagnet platform, the power supply control module passes current to the electromagnetic coil, under the action of electromagnetic induction, the core generates a strong magnetic field, and then generates a magnetic attraction force on the PCB, to firmly attract the PCB on the electromagnet platform. This magnetic attraction fixing mode can avoid the non-uniform mechanical clamping force or the direct contact between the clamping component and the PCB surface, to cause scratches on the PCB surface, and thus ensure the quality of the PCB product.

[0038] Reference Figure 4 The second moving mechanism 200 includes a left-right moving assembly 210 and an up-down moving assembly 220, the left-right moving assembly 210 is used to drive the polishing mechanism 400 to move in the left-right direction, and the up-down moving assembly 220 is used to drive the polishing mechanism 400 to move in the up-down direction. The second moving mechanism 200 further includes a support, the support is arranged on the workbench 600, the left-right moving assembly 210 includes a second lead screw, a second nut, a second motor and a second sliding plate 211, both ends of the second lead screw are rotatably connected to the support, the second nut is threadedly connected with the second lead screw, the second motor is arranged on the support, the output end of the second motor is connected with the second lead screw, the second sliding plate 211 is slidably connected to the support in the left-right direction, the second sliding plate 211 is connected with the second nut, and the up-down moving assembly 220 is arranged on the second sliding plate 211. The output end of the up-down moving assembly 220 is connected with the polishing mechanism 400, and the second motor can drive the second lead screw to rotate, so that the second sliding plate 211 drives the up-down moving assembly 220 and the polishing mechanism 400 to move in the left-right direction. It can be understood that the second lead screw is parallel to the left-right direction, the second motor drives the second lead screw to rotate, since the second nut is threadedly connected with the second lead screw, the second nut can move along the length direction of the second lead screw, so that the second nut drives the second sliding plate 211 to move in the left-right direction, and then the second sliding plate 211 drives the up-down moving assembly 220 and the polishing mechanism 400 to move in the left-right direction. In the embodiment of the utility model, two second sliding rails are arranged on the support, two second sliding blocks are arranged on the second sliding plate 211, and the two second sliding blocks are slidably connected to the two second sliding rails, so that the second sliding plate 211 can stably slide on the support in the left-right direction.

[0039] With reference to Figure 4 The up-down moving assembly 220 comprises a third screw rod, a third nut, a third motor and a third sliding plate 221. The up-down ends of the third screw rod are both rotationally connected to the second sliding plate 211. The third nut is threadedly connected with the third screw rod. The third motor is arranged on the second sliding plate 211. The output end of the third motor is connected with the third screw rod. The third sliding plate 221 is slidably connected to the second sliding plate 211 in the up-down direction. The third sliding plate 221 is connected with the third nut. The polishing mechanism 400 is arranged on the third sliding plate 221. The third motor can drive the third screw rod to rotate, so that the third sliding plate 221 drives the polishing mechanism 400 to move in the up-down direction. It can be understood that the third screw rod is parallel to the up-down direction. The third motor drives the third screw rod to rotate. Since the third nut is threadedly connected with the third screw rod, the third nut can move along the length direction of the third screw rod, so that the third nut drives the third sliding plate 221 and the polishing mechanism 400 to move in the up-down direction.

[0040] With reference to Figure 3 The polishing mechanism 400 comprises a mounting frame 410, a fourth motor 420, a polishing head 430 and a transmission assembly 440. The mounting frame 410 is arranged on the third sliding plate 221. The fourth motor 420 is arranged on the mounting frame 410. The polishing head 430 is rotationally connected to the mounting frame 410. The fourth motor 420 is in transmission connection with the polishing head 430 through the transmission assembly 440, so that the fourth motor 420 can drive the polishing head 430 to rotate. The transmission assembly 440 comprises a driving gear 441 and a driven gear 442. The driven gear 442 is rotationally connected to the mounting frame 410 and connected with the polishing head 430. The driving gear 441 is connected with the output end of the fourth motor 420. The driving gear 441 and the driven gear 442 are in meshing with each other. It can be understood that the third sliding plate 221 drives the mounting frame 410 to move in the up-down direction, so that the fourth motor 420, the transmission assembly 440 and the polishing head 430 can move in the up-down direction. The fourth motor 420 drives the driving gear 441 to rotate. Since the driving gear 441 is in meshing with the driven gear 442, the driven gear 442 can drive the polishing head 430 to rotate, so that the polishing head 430 can polish the copper surface of the PCB. It should be explained that the polishing head 430 is a kind of grinding piece, which will not be further described here.

[0041] As an embodiment of the utility model, the visual camera 510 is arranged on the fourth motor 420. After the PCB is placed on the positioning fixture 300, the second moving mechanism 200 drives the polishing mechanism 400 and the visual camera 510 to move to the upper side of the positioning fixture 300, so that the visual camera 510 can take a photo of the PCB on the positioning fixture 300, and then the polishing mechanism 400 can polish the multiple defect areas on the copper surface of the PCB in sequence, and in the process of polishing of the polishing mechanism 400, the visual camera 510 can take a photo of the copper surface of the PCB in real time, so as to ensure that the polishing mechanism 400 can completely polish the defects, which will not be further described here.

[0042] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0043] Of course, the utility model is not limited to the above-mentioned implementation, and the skilled person in the art can also make equivalent modifications or replacements without departing from the spirit of the utility model, and these equivalent modifications or replacements are all included in the range defined by the claims of the present application.

Claims

1. A PCB copper surface polisher, characterized in that, The utility model relates to a PCB copper surface polishing device, including: Workbench (600); First mobile mechanism (100) is located on the workbench (600), the output end of first mobile mechanism (100) is connected with positioning fixture (300), and the positioning fixture (300) is used for positioning PCB, and first mobile mechanism (100) is used to drive positioning fixture (300) moves along front and back directions; Second mobile mechanism (200) is located on the workbench (600); Polishing mechanism (400) is connected on the output end of second mobile mechanism (200), and second mobile mechanism (200) is used to drive polishing mechanism (400) moves along left and right directions and up and down directions; Visual identification control mechanism (500) is electrically connected with first mobile mechanism (100) and second mobile mechanism (200), and visual identification control mechanism (500) is used to identify the defect area on the copper surface of PCB on positioning fixture (300) and control first mobile mechanism (100) and second mobile mechanism (200) start, so that polishing mechanism (400) can polish the defect area on the copper surface of PCB on positioning fixture (300).

2. The PCB copper surface polisher of claim 1, wherein: It further includes a first slide rail (130) and a first sliding block (140), the first slide rail (130) is parallel to the front and back directions, the first slide rail (130) is arranged on the workbench (600), and the first sliding block (140) is arranged on the positioning fixture (300) and is slidably connected to the first slide rail (130).

3. The PCB copper surface polisher of claim 2, wherein: The first mobile mechanism (100) includes a first screw rod (110), a first nut and a first motor (120), both ends of the first screw rod (110) are rotatably connected to the workbench (600), the first nut is threadedly connected to the first screw rod (110), the first nut is connected to the positioning fixture (300), the output end of the first motor (120) is connected to the first screw rod (110), and the first motor (120) can drive the first screw rod (110) to rotate, so that the positioning fixture (300) moves along the front and back directions.

4. The PCB copper surface polisher of claim 1, wherein: The positioning fixture (300) includes an electromagnet platform, the electromagnet platform is connected to the output end of the first mobile mechanism (100), and the electromagnet platform can magnetically attract the PCB.

5. The PCB copper surface polisher of claim 1, wherein: The second mobile mechanism (200) includes a left-right moving assembly (210) and an up-down moving assembly (220), the left-right moving assembly (210) is used to drive the polishing mechanism (400) to move along the left and right directions, and the up-down moving assembly (220) is used to drive the polishing mechanism (400) to move along the up and down directions.

6. The PCB copper surface polisher of claim 5, wherein: The second moving mechanism (200) further comprises a support arranged on the workbench (600), the left-right moving assembly (210) comprises a second screw rod, a second nut, a second motor and a second sliding plate (211), both ends of the second screw rod are rotatably connected to the support, the second nut is threadedly connected with the second screw rod, the second motor is arranged on the support, an output end of the second motor is connected with the second screw rod, the second sliding plate (211) is slidably connected to the support in the left-right direction, the second sliding plate (211) is connected with the second nut, the up-down moving assembly (220) is arranged on the second sliding plate (211), an output end of the up-down moving assembly (220) is connected with the polishing mechanism (400), and the second motor can drive the second screw rod to rotate, so that the second sliding plate (211) drives the up-down moving assembly (220) and the polishing mechanism (400) to move in the left-right direction.

7. The PCB copper surface polisher of claim 6, wherein: The up-down moving assembly (220) comprises a third screw rod, a third nut, a third motor and a third sliding plate (221), both ends of the third screw rod are rotatably connected to the second sliding plate (211), the third nut is threadedly connected with the third screw rod, the third motor is arranged on the second sliding plate (211), an output end of the third motor is connected with the third screw rod, the third sliding plate (221) is slidably connected to the second sliding plate (211) in the up-down direction, the third sliding plate (221) is connected with the third nut, and the polishing mechanism (400) is arranged on the third sliding plate (221). The third motor can drive the third screw rod to rotate, so that the third sliding plate (221) drives the polishing mechanism (400) to move in the up-down direction.

8. The PCB copper surface polisher of claim 7, wherein: The polishing mechanism (400) comprises a mounting frame (410), a fourth motor (420), a polishing head (430) and a transmission assembly (440), the mounting frame (410) is arranged on the third sliding plate (221), the fourth motor (420) is arranged on the mounting frame (410), the polishing head (430) is rotatably connected to the mounting frame (410), and the fourth motor (420) is in transmission connection with the polishing head (430) through the transmission assembly (440), so that the fourth motor (420) can drive the polishing head (430) to rotate.

9. The PCB copper surface polisher of claim 8, wherein: The transmission assembly (440) comprises a driving gear (441) and a driven gear (442), the driven gear (442) is rotatably connected to the mounting frame (410) and connected with the polishing head (430), the driving gear (441) is connected with an output end of the fourth motor (420), and the driving gear (441) and the driven gear (442) are in meshing connection.

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