CN113043096A

CN113043096A - High-end device that PCB board both sides were polished

Info

Publication number: CN113043096A
Application number: CN202110253594.7A
Authority: CN
Inventors: 钟衍滔
Original assignee: Individual
Current assignee: Guangdong Hengzhaofeng Technology Co ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-06-29
Anticipated expiration: 2041-03-09
Also published as: CN113043096B

Abstract

The invention relates to a polishing device, in particular to a high-end device for polishing two surfaces of a PCB. The invention provides a high-end device for polishing two surfaces of a PCB, which can quickly polish two surfaces of the PCB at high end, can feed and clamp the PCB, and can rotate the PCB to remove powder, thereby reducing the labor intensity of workers. The utility model provides a high-end device that PCB board both sides were polished, including: the bottom plate is symmetrically provided with the fixing frames; the bottom plate is provided with a first sliding rail; the clamping mechanism is connected between the two first sliding rails in a sliding manner; and the grinding mechanism is connected between the two fixing frames, and the clamping mechanism is matched with the grinding mechanism. The PCB polishing machine is provided with the clamping mechanism, and the clamping mechanism is matched with the polishing mechanism, so that the PCB can be clamped, and meanwhile, two sides of the PCB can be polished; through clamping mechanism and rotary mechanism cooperation, can make powder and other impurity on the PCB board drop.

Description

High-end device that PCB board both sides were polished

Technical Field

The invention relates to a polishing device, in particular to a high-end device for polishing two surfaces of a PCB.

Background

The PCB board is also called as a printed circuit board, the PCB board is a provider of electrical connection of electronic components, the PCB board can be divided into a single-sided board, a double-sided board and other multilayer circuit boards according to the number of layers of the circuit boards, along with the vigorous development of the electronic industry, the demand of the PCB board is continuously increased, meanwhile, the manufacturing difficulty of the high-end PCB board is also increased, the PCB board can pass through the grinding rollers which are oppositely arranged by the commonly used board grinding method at present, but the grinding mode can not well take account of the uneven surface of the PCB board, the base material at the protruding part is easily exposed or the resin at the recessed part is not completely ground, and the serious quality control problem is caused.

The patent application number CN207746853U discloses a PCB polishing device, and the invention discloses a PCB polishing device, which comprises a conveyor belt and an upper cover, wherein the upper end of a connecting rod is connected with the upper cover through a rotating shaft; the upper end of the connecting rod is arranged on one side, close to the inlet end of the conveyor belt, of the upper oblique part of the brush head; the PCB polishing device has the advantages that the PCB polishing device is simple in structure and convenient to operate, the PCB is polished, feeding and rotation of the PCB are not better realized in the operation process, and the working efficiency of PCB polishing is reduced.

Therefore, need to design one kind to the high-end device that can polish fast PCB board two sides high-end to above-mentioned prior art problem, can be simultaneously to PCB board material loading and clamp tightly, can rotate the powder of going to the PCB board moreover to can alleviate workman intensity of labour's PCB board two sides and polish.

Disclosure of Invention

In order to overcome the present commonly used board method of grinding and can make the PCB board pass between the mill rumble of relative setting, but this kind of mode of polishing can not be fine compromise PCB board unevenness's surface, make the exposed or sunken department resin of jut base material clean not polishing easily, cause the shortcoming of more serious article accuse problem, the technical problem that will solve: the utility model provides a can polish high-end to PCB board two sides fast, can be simultaneously to PCB board material loading with press from both sides tightly, can rotate the powder of going to the PCB board moreover to can alleviate workman intensity of labour's the high-end device that polishes in PCB board two sides.

The technical scheme is as follows: the utility model provides a high-end device that PCB board both sides were polished, including:

the bottom plate is symmetrically provided with the fixing frames;

the bottom plate is provided with a first sliding rail;

the clamping mechanism is connected between the two first sliding rails in a sliding manner;

and the grinding mechanism is connected between the two fixing frames, and the clamping mechanism is matched with the grinding mechanism.

Preferably, the clamping mechanism includes:

the first sliding blocks are arranged on the two first sliding rails in a sliding manner;

the two first sliding blocks are respectively and rotatably provided with a first support frame;

the two first support frames are both provided with a clamp in a sliding manner;

first springs are sleeved on the two clamps, and two ends of the two first springs are connected to the first support frame and the clamps respectively.

Preferably, the grinding mechanism comprises:

the two fixing frames are provided with a second supporting frame;

the first rotating shaft is rotatably connected between the two second supporting frames;

the second rotating shafts are rotatably connected between the two second supporting frames;

the two second rotating shafts are respectively provided with a fine grinding wheel;

the middle parts of the two first rotating shafts are connected with a first gear set; the transmission assembly is connected between a first rotating shaft on the same side and a second rotating shaft on the same side, the transmission assembly is composed of two first belt pulleys and a first belt, one first belt pulley is connected to the first rotating shaft, the other first belt pulley is connected to the second rotating shaft, and the first belt is wound between the two first belt pulleys.

Preferably, the apparatus further comprises a rotating mechanism, wherein the rotating mechanism comprises:

the bottom plate is provided with a first rack;

the middle parts of the two first support frames are respectively provided with a second gear, and the first racks on the same side are in contact fit with the second gears on the same side;

and the two ends of the two second torsion springs are respectively connected to the first sliding block and the second gear.

Preferably, still including feed mechanism, feed mechanism includes:

the upper part of the bottom plate is provided with a third support frame;

the upper part of the third supporting frame is provided with a supporting plate;

the third support frame is provided with a first wedge block;

and the two clamps are provided with second wedge blocks which are matched with the first wedge blocks.

Preferably, the device further comprises an auxiliary mechanism, wherein the auxiliary mechanism comprises:

the fourth support frame is connected between the bottoms of the two first sliding blocks;

the bottom plates are provided with fifth supporting frames;

the two fifth supporting frames are provided with guide wheels;

the bottom plate is provided with a sixth supporting frame which is positioned above the fifth supporting frame;

the two sixth supporting frames are respectively provided with a reel in a rotating mode, and the inner ends of the two reels are fixedly connected with the first rotating shaft at the lower part;

the two reels are sleeved with third torsion springs, and two ends of each of the two third torsion springs are respectively connected to the sixth supporting frame and the reel;

the steel rope is connected between the fourth support frame and the two reels, and the steel rope on the same side bypasses the guide wheel on the same side.

Preferably, still include self-locking mechanism, self-locking mechanism includes:

the fourth support frames are provided with third wedge blocks;

the two sides of the first rotating shaft at the lower part of the first friction block are respectively provided with the first friction block;

the two sides of the bottom plate are both provided with second sliding rails which are positioned below the first friction block;

the two second sliding rails are internally provided with a second friction block in a sliding manner, and the second friction block on the same side is in contact with the first friction block on the same side;

the two second friction blocks are sleeved with fourth springs, and two ends of each of the two fourth springs are connected to the second slide rail and the second friction block respectively;

fifth torsion springs are sleeved on the first rotating shafts at the lower parts of the fifth torsion springs, and two ends of each of the fifth torsion springs are connected to the reel and the first friction block respectively;

and the fourth wedge blocks are arranged on the two second friction blocks, and the fourth wedge blocks on the same side are matched with the third wedge blocks on the same side.

Preferably, the device also comprises a feeding mechanism, wherein the feeding mechanism comprises:

the seventh supporting frame is connected between the middle parts of the two fixing frames;

the connecting frame is arranged on the bottom plate;

the motor is arranged on the connecting frame;

the bottom plate is provided with an eighth supporting frame;

the screw rod is connected between the upper part of the seventh support frame and the upper part of the eighth support frame in a threaded manner, the screw rod is connected with the fourth support frame in a threaded manner, and the end part of the screw rod is fixedly connected with the output shaft of the motor.

Compared with the prior art, the invention has the following beneficial effects:

1. the PCB polishing machine is provided with the clamping mechanism, and the clamping mechanism is matched with the polishing mechanism, so that the PCB can be clamped, and meanwhile, two sides of the PCB can be polished;

2. the clamping mechanism is matched with the rotating mechanism, so that powder and other impurities on the PCB can fall off;

3. the grinding mechanism is matched with the feeding mechanism, so that two sides of the PCB can be quickly ground; the labor intensity of workers is effectively reduced.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of the clamping mechanism of the present invention.

Fig. 3 is a schematic perspective view of a grinding mechanism according to the present invention.

Fig. 4 is a schematic perspective view of the rotating mechanism of the present invention.

Fig. 5 is a schematic perspective view of the feeding mechanism of the present invention.

Fig. 6 is a schematic perspective view of the auxiliary mechanism of the present invention.

Fig. 7 is a schematic perspective view of the self-locking mechanism of the present invention.

Fig. 8 is a schematic perspective view of the feeding mechanism of the present invention.

In the reference symbols: 1. the device comprises a base plate, a fixing frame, a base plate, a first sliding rail, a base plate, a second sliding rail, a first sliding block, a clamping mechanism, a first sliding block, a second sliding block, a clamping mechanism, a clamp, a 44, a first spring, a second spring, a grinding mechanism, a polishing mechanism, a 51, a second supporting frame, a 52, a first rotating shaft, a second rotating shaft, a 54, a grinding wheel, a 55, a transmission component, a 56, a first gear set, a 6, a rotating mechanism, a 61, a first rack, a second gear, a 63, a second torsion spring, a 7, a feeding mechanism, a 71, a third supporting frame, a 72, a supporting plate, a 73, a first wedge-shaped block, a, The feeding mechanism comprises a second friction block, 95, a fourth spring, 96, a fourth wedge block, 97, a fifth torsion spring, 10, a feeding mechanism, 101, a seventh support frame, 102, a connecting frame, 103, a motor, 104, an eighth support frame, 105 and a screw rod.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.

Example 1

The utility model provides a high-end device that PCB board both sides were polished, as shown in figure 1, including bottom plate 1, mount 2, first slide rail 3, clamping mechanism 4 and grinding machanism 5, the front side symmetry is equipped with mount 2 on the bottom plate 1, all is equipped with first slide rail 3 on the bottom plate 1, and slidingtype connection has clamping mechanism 4 between two first slide rails 3, is connected with grinding machanism 5 between two mount 2, and clamping mechanism 4 cooperates with grinding machanism 5.

When needs are polished to PCB board both sides, the workman can press from both sides the PCB board tightly through clamping mechanism 4, and the workman promotes clamping mechanism 4 and moves in first slide rail 3 to drive the PCB board and move to 5 contacts with grinding machanisms, grinding machanism 5 can polish the PCB board both sides, and the workman is repeated above step, can realize polishing PCB board both sides.

Example 2

In a preferred embodiment of the present invention, as shown in fig. 1-8, the clamping mechanism 4 includes a first slider 41, a first supporting frame 42, a clamp 43 and a first spring 44, the first slider 41 is slidably disposed on each of the two first slide rails 3, the first supporting frame 42 is rotatably disposed on each of the two first sliders 41, the clamp 43 is slidably disposed on each of the two first supporting frames 42, the first spring 44 is sleeved on each of the two clamps 43, and two ends of each of the two first springs 44 are respectively connected to the first supporting frame 42 and the clamp 43.

When the PCB is required to be clamped, a worker holds the clamps 43, pulls the two clamps 43 to move outwards, the first springs 44 are compressed, when a gap between the two clamps 43 is large, the worker puts the PCB between the two clamps 43, releases the clamps 43 to reset the first springs 44, and drives the clamps 43 to move inwards to clamp the PCB.

Grinding machanism 5 is including second support frame 51, first pivot 52, second pivot 53, good emery wheel 54, drive assembly 55 and first gear train 56, all be equipped with second support frame 51 on two mounts 2, the rotary type is connected with first pivot 52 between the front side on two second support frames 51, the rotary type is connected with second pivot 53 between the rear side on two second support frames 51, all be equipped with good emery wheel 54 on two second pivot 53, be connected with first gear train 56 between the middle part of two first pivot 52, be connected with drive assembly 55 between the first pivot 52 of homonymy and the second pivot 53 of homonymy, drive assembly 55 comprises two first belt pulleys and first belt, a first belt pulley is connected on first pivot 52, another first belt pulley is connected at second pivot 53, first belt is around between two first belt pulleys.

When the workman need use grinding machanism 5, the PCB board is in good emery wheel 54 this moment, the workman rotates second pivot 53 rotatory, thereby it is rotatory to drive first gear train 56 and the transmission assembly 55 of downside, and then it is rotatory to drive the first pivot 52 of upside and the second pivot 53 of downside, then it is rotatory to drive the transmission assembly 55 of upside and good emery wheel 54 of downside, and it is rotatory to drive the second pivot 53 of upside and the good emery wheel 54 of upside again, the good emery wheel 54 of upper and lower both sides is rotatory can polish PCB board two sides.

The rotary mechanism 6 is further included, the rotary mechanism 6 comprises a first rack 61, a second gear 62 and a second torsion spring 63, the first rack 61 is arranged on the bottom plate 1, the second gear 62 is arranged in the middle of the two first support frames 42, the first rack 61 on the same side is in contact fit with the second gear 62 on the same side, the second torsion spring 63 is sleeved on the outer sides of the two first support frames 42, and two ends of the two second torsion springs 63 are connected to the first sliding block 41 and the second gear 62 respectively.

Since the powder generated during the polishing of the two sides of the PCB is generated, when the two sides of the PCB are to be polished, the worker pushes the first slider 41 to move forward to drive the first support frame 42 and the clamp 43 to move forward, and further to drive the second gear 62 to move forward to engage with the first rack 61, the second torsion spring 63 is twisted and deformed to drive the first support frame 42 and the clamp 43 to rotate, and further to drive the PCB in the clamp 43 to rotate, so that the impurities on the PCB can fall off, when the second gear 62 rotates to be not engaged with the first rack 61, the second torsion spring 63 is reset to rotate the second gear 62 in the reverse direction, so as to drive the PCB to rotate in the reverse direction, when the two sides of the PCB are polished, the first slider 41 is pushed to move backward, and further to drive the second gear 62 to move backward to engage with the first rack 61, and the second torsion spring 63 is twisted and deformed to drive the PCB to rotate, then make the powder on the PCB board drop, the efficiency of polishing in effectual improvement PCB board two sides, second gear 62 is rotatory not with first rack 61 meshing, and second torsion spring 63 resets and makes PCB board antiport, realizes dropping of the powder on the PCB board.

Still including feed mechanism 7, feed mechanism 7 is equipped with third support frame 71 including third support frame 71, layer board 72, first wedge 73 and second wedge 74, and bottom plate 1 upper portion rear side is equipped with third support frame 71, and third support frame 71 upper portion rear side is equipped with layer board 72, and third support frame 71 front side is equipped with first wedge 73, all is equipped with second wedge 74 on two anchor clamps 43, and two second wedges 74 all cooperate with first wedge 73.

When anchor clamps 43 move backward, the workman need place the PCB board on layer board 72, anchor clamps 43 move backward drives second wedge 74 and moves backward to contact with first wedge 73, thereby extrude second wedge 74 outward movement, and then drive anchor clamps 43 outward movement, first spring 44 is compressed, anchor clamps 43 temporarily can not press from both sides the PCB board tight, second wedge 74 continues to move backward to not contacting with first wedge 73, first spring 44 resets and can drive anchor clamps 43 inward movement and reset to contacting with the PCB board that does not polish, anchor clamps 43 can press from both sides tightly the PCB board, the PCB board ejection of compact that the realization was polished and the PCB board that does not polish are tight effect tightly.

The auxiliary mechanism 8 comprises a fourth support frame 81, a fifth support frame 82, a guide wheel 83, a sixth support frame 84, a reel 85, a third torsion spring 86 and a steel rope 87, the fourth support frame 81 is connected between the bottoms of the two first sliding blocks 41, the fifth support frame 82 is arranged on the upper side of the front part of the bottom plate 1, the guide wheels 83 are arranged on the two fifth support frames 82, the sixth support frame 84 is arranged on the upper side of the front part of the bottom plate 1, the sixth support frame 84 is positioned above the fifth support frame 82, the reel 85 is rotatably arranged on the two sixth support frames 84, the inner ends of the two reels 85 are fixedly connected with the first rotating shaft 52 on the lower part, the third torsion springs 86 are sleeved on the two reels 85, the two ends of the two third torsion springs 86 are respectively connected to the sixth support frame 84 and the reel 85, the steel rope 87 is connected between the fourth support frame 81 and the two reels 85, the same side wire rope 87 is passed around the same side guide wheel 83.

Third torsion spring 86 initial state is tensile, when first slider 41 moves forward, first slider 41 moves forward and drives fourth support frame 81 to move forward, thereby make cable 87 relax, third torsion spring 86 resets and drives reel 85 rotation and pack up cable 87, also drive first pivot 52 simultaneously and rotate, thereby make good emery wheel 54 rotatory, good emery wheel 54 can polish PCB board both sides simultaneously, when first slider 41 moves backward, first slider 41 moves backward and drives fourth support frame 81 to reset, thereby make cable 87 tighten, cable 87 tightens and drives reel 85 rotation, and then make third torsion spring 86 be in by tensile initial state, thereby it is rotatory to drive first pivot 52.

The self-locking mechanism 9 is further included, the self-locking mechanism 9 includes a third wedge-shaped block 91, a first friction block 92, a second slide rail 93, a second friction block 94, a fourth spring 95, a fourth wedge-shaped block 96 and a fifth torsion spring 97, the third wedge-shaped block 91 is arranged on the front side of the fourth supporting frame 81, the first friction block 92 is arranged on the left side and the right side of the front portion of the first rotating shaft 52 on the lower portion, the second slide rail 93 is arranged on the left side and the right side of the front portion of the bottom plate 1, the second slide rail 93 is positioned below the first friction block 92, the second friction block 94 is arranged in the two second slide rails 93 in a sliding manner, the second friction block 94 on the same side is in friction contact with the first friction block on the same side, the fourth spring 95 is sleeved on the two second friction blocks 94, two ends of the four spring 95 are respectively connected to the second slide rail 93 and the second friction block 94, the fifth torsion spring 97 is sleeved on the first rotating shaft 52 on the lower portion, two ends of the fifth torsion spring 97 are, the two second friction blocks 94 are both provided with a fourth wedge block 96, and the fourth wedge block 96 on the same side is matched with the third wedge block 91 on the same side.

When the fourth supporting frame 81 moves forward, the fifth torsion spring 97 is stretched in an initial state, the fourth supporting frame 81 moves forward to drive the third wedge-shaped block 91 to move forward to contact with the fourth wedge-shaped block 96, so that the steel rope 87 is loosened, at this time, the second friction block 94 fixes the first friction block 92, so that the first rotating shaft 52 and the reel 85 stop rotating, the third wedge-shaped block 91 moves forward to push the fourth wedge-shaped block 96 to move downward to drive the second friction block 94 to move downward not to contact with the first friction block 92, the fourth spring 95 is compressed, and the third torsion spring 86 and the fifth torsion spring 97 are reset to drive the reel 85 to rotate, the reel 85 retracts the steel rope 87, so that the grinding wheel 54 rotates, the grinding wheel 54 grinds two sides of the PCB, when the fourth supporting frame 81 moves backward, the fourth supporting frame 81 moves backward to tighten the steel rope 87, further, the fifth torsion spring 97 is initially extended and drives the third wedge 91 to move backward, the third wedge 91 does not contact with the fourth wedge 96, and the second friction block 94 is fixed by the fourth spring 95 being reset.

The automatic feeding device is characterized by further comprising a feeding mechanism 10, the feeding mechanism 10 comprises a seventh supporting frame 101, a connecting frame 102, a motor 103, an eighth supporting frame 104 and a screw rod 105, the seventh supporting frame 101 is connected between the middles of the two fixing frames 2, the connecting frame 102 is arranged on the bottom plate 1 on the rear side, the motor 103 is installed on the connecting frame 102, the eighth supporting frame 104 is arranged on the bottom plate 1 on the rear side, the eighth supporting frame 104 is located in front of the motor 103, the screw rod 105 is in threaded connection between the upper portion of the seventh supporting frame 101 and the upper portion of the eighth supporting frame 104, the screw rod 105 is in threaded connection with the fourth supporting frame 81, and the rear end of the screw rod.

When needs are polished to PCB board two sides, workman starter motor 103, the rotatory lead screw 105 that drives of motor 103 output shaft is rotatory, thereby drive fourth support frame 81 forward motion, and then drive anchor clamps 43 forward motion, anchor clamps 43 forward motion can make the PCB board rotatory, thereby make steel cable 87 relax, reel 85 rotation can be packed up steel cable 87, then it is rotatory to drive good emery wheel 54, good emery wheel 54 can be polished PCB board two sides simultaneously, the workman closes motor 103 afterwards, realize the effect that PCB board two sides were polished fast.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a high-end device that PCB board both sides were polished, characterized by, including:

the device comprises a bottom plate (1) and fixing frames (2), wherein the fixing frames (2) are symmetrically arranged on the bottom plate (1);

the bottom plate (1) is provided with a first sliding rail (3);

the clamping mechanism (4) is connected between the two first sliding rails (3) in a sliding manner;

the polishing mechanism (5) is connected between the two fixing frames (2), and the clamping mechanism (4) is matched with the polishing mechanism (5).

2. A high-end apparatus for double-side grinding of PCB boards as claimed in claim 1 wherein the clamping mechanism (4) comprises:

the first sliding blocks (41) are arranged on the two first sliding rails (3) in a sliding manner;

the first support frames (42) are respectively and rotatably arranged on the two first sliding blocks (41);

the clamps (43) are arranged on the two first supporting frames (42) in a sliding manner;

the first springs (44) are sleeved on the two clamps (43), and two ends of each of the two first springs (44) are connected to the first support frame (42) and the corresponding clamp (43) respectively.

3. A high-end apparatus for double-side grinding of PCB boards as claimed in claim 2 wherein the grinding mechanism (5) comprises:

the second supporting frames (51) are arranged on the two fixing frames (2);

the first rotating shaft (52) is rotatably connected between the two second supporting frames (51);

the second rotating shafts (53) are rotatably connected between the two second supporting frames (51);

the grinding wheels (54) are arranged on the two second rotating shafts (53);

the first gear set (56) is connected between the middle parts of the two first rotating shafts (52); the transmission assembly (55) is connected between first pivot (52) and second pivot (53) of homonymy of transmission assembly (55), and transmission assembly (55) comprises two first belt pulleys and first belt, and a first belt pulley is connected on first pivot (52), and another first belt pulley is connected in second pivot (53), and first belt is around between two first belt pulleys.

4. A high-end apparatus for polishing both sides of a PCB as claimed in claim 3, further comprising a rotating mechanism (6), wherein the rotating mechanism (6) comprises:

the bottom plate (1) is provided with a first rack (61);

the upper middle parts of the two first support frames (42) are respectively provided with a second gear (62), and the first racks (61) on the same side are in contact fit with the second gears (62) on the same side;

the two first support frames (42) are sleeved with second torsion springs (63), and two ends of each second torsion spring (63) are connected to the first sliding block (41) and the second gear (62) respectively.

5. The high-end device for polishing two sides of a PCB as claimed in claim 4, further comprising a feeding mechanism (7), wherein the feeding mechanism (7) comprises:

a third support frame (71), wherein the upper part of the bottom plate (1) is provided with the third support frame (71);

the supporting plate (72) is arranged at the upper part of the third supporting frame (71);

the third support frame (71) is provided with a first wedge-shaped block (73);

and the two clamps (43) are respectively provided with a second wedge block (74), and the two second wedge blocks (74) are matched with the first wedge block (73).

6. The high-end device for polishing two sides of a PCB as claimed in claim 5, further comprising an auxiliary mechanism (8), wherein the auxiliary mechanism (8) comprises:

the fourth supporting frame (81) is connected between the bottoms of the two first sliding blocks (41);

the bottom plate (1) is provided with fifth support frames (82);

the guide wheels (83) are arranged on the two fifth support frames (82);

the bottom plate (1) is provided with sixth supporting frames (84), and the sixth supporting frames (84) are positioned above the fifth supporting frames (82);

the two sixth supporting frames (84) are respectively provided with a winding wheel (85) in a rotating mode, and the inner ends of the two winding wheels (85) are fixedly connected with the first rotating shaft (52) at the lower part;

the third torsion springs (86) are sleeved on the two reels (85), and two ends of each third torsion spring (86) are respectively connected to the sixth supporting frame (84) and the reels (85);

the steel rope (87) is connected between the fourth support frame (81) and the two reels (85), and the steel rope (87) on the same side bypasses the guide wheel (83) on the same side.

7. The high-end device for polishing two sides of a PCB as claimed in claim 6, further comprising a self-locking mechanism (9), wherein the self-locking mechanism (9) comprises:

the third wedge blocks (91) are arranged on the fourth supporting frames (81);

the first friction block (92) is arranged on each of two sides of the lower first rotating shaft (52);

the two sides of the bottom plate (1) are provided with second sliding rails (93), and the second sliding rails (93) are positioned below the first friction blocks (92);

the second friction blocks (94) are arranged in the two second sliding rails (93) in a sliding manner, and the second friction blocks (94) on the same side are in friction contact with the first friction blocks on the same side;

the two second friction blocks (94) are sleeved with the fourth springs (95), and two ends of each of the two fourth springs (95) are connected to the second sliding rail (93) and the second friction block (94) respectively;

fifth torsion springs (97) are sleeved on the first rotating shaft (52) at the lower part of the fifth torsion springs (97), and two ends of each of the fifth torsion springs (97) are respectively connected to the reel (85) and the first friction block (92);

and the two second friction blocks (94) are respectively provided with a fourth wedge block (96), and the fourth wedge block (96) on the same side is matched with the third wedge block (91) on the same side.

8. The high-end device for polishing two sides of a PCB as claimed in claim 7, further comprising a feeding mechanism (10), wherein the feeding mechanism (10) comprises:

a seventh supporting frame (101), wherein the seventh supporting frame (101) is connected between the middle parts of the two fixing frames (2);

the connecting frame (102) is arranged on the bottom plate (1);

the motor (103), the motor (103;

the bottom plate (1) is provided with an eighth support frame (104);

the screw rod (105) is connected between the upper portion of the seventh supporting frame (101) and the upper portion of the eighth supporting frame (104) in a threaded mode, the screw rod (105) is connected with the fourth supporting frame (81) in a threaded mode, and the end portion of the screw rod (105) is fixedly connected with an output shaft of the motor (103).