A PCB board burr grinding device

Abstract

The present invention relates to the field of circuit board polishing, and specifically provides a PCB board burr grinding device, comprising: a base, on which a conveyor belt, a transmission device and a support plate are sequentially installed; a first polishing belt, which is driven and installed on the transmission device; a discrete mechanism, which is suspended above the conveyor belt; a vertical retaining frame, which is suspended above the first polishing belt; a lifting device, which is distributed and installed on the side walls on both sides of the base; a first motor, which is installed on the lifting output end of the lifting device; a triangular polishing roller, whose two ends are respectively connected to the first motor, and is mounted between the transmission device and the support plate through the first motor; a linear drive, which is installed on both sides of the support plate; and a clamp frame, which is driven and installed on the linear drives on both sides. The present invention uses a discrete mechanism to make the strip plate stand upright for transportation, and then polishes the bottom of the strip plate through the first polishing belt, and then the triangular polishing roller polishes the remaining edges of the strip plate to achieve the expected grinding effect.

Description

Technical Field

[0001] The invention relates to the field of circuit board grinding, and in particular to a PCB board burr grinding device. Background Art

[0002] PCB boards will be processed into different shapes according to needs, and aluminum substrates will be selected for processing when selecting materials. Therefore, they will be cut by stamping in the subsequent slitting process. For example, the circuit board of the light bar can be quickly and batch-cut by stamping, but there will be some sharp burrs on the edges of the long straight edges of the cut boards, which are easy to scratch other boards or hands during subsequent testing, transportation, packaging, etc. Therefore, it is necessary to grind the edges of these cut boards. The existing grinding devices are generally suitable for rectangular sheets that have not been cut. For the light bar boards after cutting, it is impossible to get a good grinding effect. The main reason is that the width of the light bar boards is not enough. Some light bar boards are less than 3cm wide and have protruding rectangular straight edges on the edges. The use of traditional grinding devices cannot achieve the expected grinding effect. Summary of the invention

[0003] The present invention aims to solve the technical defects existing in the above-mentioned prior art. To this end, the present invention provides a PCB board burr grinding device.

[0004] To achieve the above-mentioned purpose, the present invention provides a PCB board burr grinding device, comprising: a base, on which a conveyor belt, a transmission device and a support plate are sequentially installed; a first grinding belt, which is driven and installed on the transmission device, and on which recessed grinding grooves are evenly spaced; a separate mechanism, which is suspended above the conveyor belt, and the strip plate falls on the conveyor belt through the separate mechanism and is kept in an upright state and aligned to be transported to the grinding groove of the first grinding belt; a vertical holding frame, which is suspended above the first grinding belt, and the bottom of the vertical holding frame is provided with a A vertical channel, through which the strips entering the grinding groove are kept in an upright state; a lifting device, distributed and installed on the side walls on both sides of the base; a first motor, installed on the lifting output end of the lifting device; a triangular grinding roller, whose two ends are respectively connected to the first motor, and is mounted between the transmission device and the supporting plate through the first motor to block the strips and grind the top of the strips; a linear drive, installed on both sides of the supporting plate; a clamp frame, driven and installed on the linear drives on both sides, and the clamp frame is used to clamp the strips coming out of the first grinding belt.

[0005] As a further improvement of the scheme, the discrete mechanism includes: a partition frame suspended above the conveyor belt, and discrete channels are evenly spaced on the partition frame; a swing plate, one side of which is hingedly mounted on the top of the discrete channel, and the side wall of the discrete channel is provided with an arc-shaped guide groove, and the other end of the swing plate is provided with a protrusion and placed in the guide groove so that the swing plate can swing up and down along the guide groove, and a strip plate is placed on the swing plate and falls vertically into the discrete channel as the swing plate swings; a guide bevel block is installed in the separation channel and leaves a gap, and the gap position is aligned with the grinding groove; a toggle plate is hinged to the swing plate.

[0006] As a further improvement of the scheme, it also includes: a fixing frame, mounted on the toggle plate; a latch, movably mounted on the fixing frame and sliding through the toggle plate; a retaining hole, opened on the side wall of the partition frame, the toggle plate is inserted into the retaining hole through the latch to keep the swing plate in a straight state.

[0007] As a further improvement of the solution, a step protruding upward by no more than the thickness of a strip is provided between each separation channel of the partition frame.

[0008] As a further improvement of the solution, a channel opening of the vertical channel facing the conveyor belt side is provided with an expanded bevel edge for easy entry of the strip board.

[0009] As a further improvement of the scheme, the triangular grinding roller includes: a triangular tube, one side of which is provided with a notch leading into the tube; a second grinding belt, which is wrapped around the outside of the triangular tube and partially inserted into the tube through the notch; a rotating shaft, which is arranged in the triangular tube and is wrapped by the second grinding belt in the tube; an edge sealing plate, which is installed at both ends of the triangular tube, and the rotating shaft rotates through the edge sealing plate; a second motor, whose output shaft is connected to the rotating shaft; a sleeve, which is installed at both ends of the triangular tube, and the second motor is placed in the sleeve; a connecting shaft, which is installed at the end of the sleeve, and the connecting shafts on both sides are connected to the output shaft of the first motor.

[0010] As a further improvement of the solution, it also includes: a plurality of pressure rollers, which are rotatably arranged inside the triangular tube and closely attached to the surface of the second grinding belt.

[0011] As a further improvement of the solution, it also includes: a heat dissipation channel, which is opened on the sleeve to penetrate inside and outside.

[0012] As a further improvement of the solution, it also includes: a middle brush plate, which is arranged at the notch of the triangular tube and contacts the second grinding belt on one side.

[0013] As a further improvement of the scheme, the clamp frame includes: a fixed plate, connected to the linear drives on both sides; a movable plate, slidably mounted on the fixed plate; clamping blocks, which are evenly spaced and staggered to install the fixed plate and the movable plate, and the clamping blocks on the fixed plate and the movable plate are flush at the same height; an electric push block, which is mounted on the fixed plate and drives the movable plate to move, so that the clamping blocks on the fixed plate and the movable plate are close to or separated from each other, so as to clamp the strip coming out of the first grinding belt.

[0014] The present invention brings at least the following effects:

[0015] 1. The present invention uses a discrete mechanism to transport the strip in an upright state, and then uses a first grinding belt to grind the bottom of the strip. While grinding, a vertical holding frame is used to keep the strip in an upright state. Then, a triangular grinding roller is used to grind the remaining edges of the strip. The raised part is polished by rotating the triangular grinding roller to achieve the expected edge grinding effect.

[0016] 2. The steps provided on the partition frame of the present invention can make it more convenient to place the strips. The stacked strips only need to be pushed from one side of the partition frame to the other side, and can be placed one by one on the corresponding swinging plate without the obstruction of the steps.

[0017] 3. The heat dissipation channel opened on the sleeve of the present invention can effectively dissipate the heat generated by the second motor in the sleeve when it is working; the pressure roller can prevent the second grinding belt from slipping when the rotating shaft drives the second grinding belt to ensure the stable transmission effect of the second grinding belt; the middle brush plate can brush off the particles attached to the surface of the second grinding belt to avoid adhesion to the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a complete schematic diagram of the present invention.

[0019] Figure 2 For the present invention Figure 1 Schematic diagram from another perspective.

[0020] Figure 3 For the present invention Figure 2 Schematic diagram with the base hidden.

[0021] Figure 4 It is a schematic diagram of the discrete mechanism of the present invention from a first viewing angle.

[0022] Figure 5 It is a schematic diagram of the discrete mechanism of the present invention from a second viewing angle.

[0023] Figure 6 It is a partially enlarged schematic diagram of the discrete mechanism of the present invention.

[0024] Figure 7 It is a schematic diagram of the state after the swing plate of the discrete mechanism of the present invention is lowered.

[0025] Figure 8 It is a schematic diagram of the swing direction of the swing plate of the discrete mechanism of the present invention.

[0026] Fig. 9 It is a schematic diagram of the first grinding belt, grinding grooves, vertical channels and flared bevel edges of the present invention.

[0027] Fig.10 It is a schematic diagram of the lifting device, the first motor and the triangular grinding roller of the present invention.

[0028] Fig.11 This is a schematic diagram of disassembling a portion of the triangular grinding roller of the present invention.

[0029] Fig.12 It is a schematic diagram of the internal cross-section of the triangular grinding roller of the present invention.

[0030] Fig.13 It is a schematic diagram of the linear drive and the clamp frame of the present invention.

[0031] Fig.14 It is a schematic diagram of the specific structure of the clamp frame of the present invention.

[0032] Among them, the corresponding relationship between the reference numerals and the names of the components in the accompanying drawings is: 1-base, 2-conveyor belt, 3-transmission device, 301-first grinding belt, 302-grinding groove, 4-supporting plate, 5-discrete mechanism, 501-partition frame, 502-discrete channel, 503-swinging plate, 5031-guide slide groove, 504-guide inclined block, 505-sliding plate, 5051-fixed frame, 5052-latch pin, 5053-holding hole, 506-step, 6-vertical holding frame, 601-vertical channel, 602-flared bevel, 7-lifting device, 8-first motor, 9-triangular grinding roller, 91-triangular tube, 92-second grinding belt, 93-rotating shaft, 94-pressure roller, 95-edge banding plate, 96-second motor, 97-sleeve, 98-heat dissipation channel, 99-connecting shaft, 910-middle brush plate, 10-linear drive, 11-clamp frame, 111-fixed plate, 112-movable plate, 113-clamp block, 114-electric push block, 100-strip plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The present invention specifically discloses a PCB board burr grinding device, such as Figure 1-Figure 14 As shown, it comprises: a base 1, on which a conveyor belt 2, a transmission device 3 and a support plate 4 are sequentially installed, the strip 100 is transferred from the conveyor belt 2 to the transmission device 3, and then transferred from the transmission device 3 to the support plate 4, and the strip 100 is polished at the part transferred to the transmission device 3. Fig. 9 As shown, the first grinding belt 301 is driven and installed on the transmission device 3, and the first grinding belt 301 is evenly spaced with concave grinding grooves 302. The transmission device 3 drives the first grinding belt 301 to transmit, and the strip 100 is placed in the grinding grooves 302. As the first grinding belt 301 is driven, the side in contact with the strip 100 is polished.

[0036] according to Figure 3 As shown, a separate mechanism 5 is suspended above the conveyor belt 2. After a plurality of slats 100 fall onto the conveyor belt 2 through the separate mechanism 5, the slats 100 are transported in a vertically upright state and aligned to be transported to the grinding groove 302 of the first grinding belt 301, so that the grinding groove 302 can grind the straight edge of the slats 100. A vertical holding frame 6 is suspended above the first grinding belt 301, and a vertical channel 601 that matches and aligns with the grinding groove 302 is provided at the bottom of the vertical holding frame 6. After the slats 100 coming out of the conveyor belt 2 come onto the first grinding belt 301 in an upright state, the slats 100 will enter the vertical channel 601, and the vertical channel 601 matches and aligns with the position of the grinding groove 302, so that the slats 100 will move on the first grinding belt 301 in an upright state under the action of the vertical channel 601, wherein, according to Fig. 9 As shown, the channel opening of the vertical channel 601 facing the conveyor belt 2 is provided with an expanded bevel 602 for easy entry of the slat 100, so that the slat 100 will not hit the channel opening when it comes out of the discrete mechanism 5 and enters the vertical channel 601, allowing the slat 100 to accurately enter the vertical channel 601.

[0037] according to Figure 3 As shown, a lifting device 7 is fixedly installed on the side walls on both sides of the base 1, and a first motor 8 is connected to the lifting output end of the lifting device 7. The first motor 8 completes the up and down lifting operation through the lifting device 7. The output shafts of the two first motors 8 are respectively connected to the two ends of the triangular grinding roller 9, so that the triangular grinding roller 9 is set between the transmission device 3 and the supporting plate 4. The raised triangular grinding roller 9 is at the end of the transmission device 3. The strip 100 transmitted from the first grinding belt 301 can be supported by the triangular grinding roller 9 and stay on the first grinding belt 301. With the continuous transmission of the first grinding belt 301, the straight edge of the bottom of the strip 100 can be polished. Linear drives 10 are installed on both sides of the support plate 4. The linear drives 10 are linear guides. The clamp frames 11 are driven and installed on the linear drives 10 on both sides. The clamp frames 11 are suspended above the support plate 4 and are moved laterally by the linear drives 10. When the triangular grinding roller 9 is lifted, the clamp frames 11 move forward, and the end of the strip 100 rests on the clamp frames 11 and is clamped by the clamp frames 11. Then the lifted triangular grinding roller 9 can grind the straight edge on the top of the strip 100.

[0038] Specifically, according to Figure 3 As shown, the strip 100 falls from the discrete mechanism 5 onto the conveyor belt 2 and is transported in a vertical state to the grinding groove 302 of the first grinding belt 301 and continues to move. During the conveying process of the first grinding belt 301, the strip 100 is kept in a vertical state by the vertical holding frame 6 and is supported by the triangular grinding roller 9 set at the exit. Under the continuous rotation of the first grinding belt 301, the grinding groove 302 grinds the long straight edge of the strip 100, thereby removing the sharp hair on the long straight edge of the strip 100. After the straight edge of the bottom is polished, the triangular polishing roller 9 is lifted by the lifting device 7 and no longer presses against the strip 100, and at the same time, the clamp frame 11 moves forward accordingly to press against the end of the strip 100 and clamps the strip 100, then the bevel of the triangular polishing roller 9 rotates to be flush with the straight edge at the top of the strip 100, and sticks to the top straight edge to start polishing the straight edge, and the clamp frame 11 pulls the strip 100 backward accordingly, and the triangular polishing roller 9 polishes the straight edge. Figure 5As shown, after the triangular grinding roller 9 encounters the protruding rectangular portion 101 of the strip 100, the top angle of the triangular grinding roller 9 will be against the corner of the protruding rectangular portion 101 of the strip 100, and the triangular grinding roller 9 can be rotated by the drive of the first motor 8. The protruding rectangular portion 101 of the strip 100 can be polished by rotating the hypotenuse of the triangular grinding roller 9 to an angle flush with the straight edge of the protruding rectangular portion 101, so as to achieve the expected polishing effect. When the strip 100 is polished, the clamp frame 11 pulls the strip 100 onto the support table and then releases it, allowing the strip 100 to fall on the support table.

[0039] according to Figure 3-Figure 8 As shown, the discrete mechanism 5 includes: a partition frame 501 suspended above the conveyor belt 2, and the partition frame 501 is evenly spaced with discrete channels 502 that pass through the partition frame 501 from top to bottom. A swing plate 503 is hingedly installed at the channel opening above the discrete channel 502. The swing plate 503 is hingedly installed at the opening of the discrete channel 502 through its one side edge. An arc-shaped guide groove 5031 is opened on the side wall of the discrete channel 502. A protrusion is provided at the other end of the swing plate 503 and is placed in the guide groove 5031. The swing plate 503 can swing up and down along the guide groove 5031 through the guide groove 5031. When the swing plate 503 is in a horizontal state, the strip can be moved. After the plate 100 is placed on the swing plate 503, as the swing plate 503 swings downward along the guide slot 5031, the strip plate 100 will fall vertically into the discrete channel 502 due to the downward inclination of the swing plate 503. A guide bevel 504 is provided in the discrete channel 502. A certain gap is left between the guide bevel 504 and the side wall of the separation channel. The position of the gap is aligned with the grinding groove 302. After falling from the swing plate 503, the strip plate 100 enters the gap and moves toward the direction of the first grinding belt 301 under the transmission of the conveyor belt 2. The swing plates 503 hingedly mounted on the discrete channel 502 are connected together by a toggle plate 505. Figure 8 As shown, by hingedly connecting the toggle plate 505 and the swing plate 503 , the toggle plate 505 can be directly used to drive all the swing plates 503 to swing together, so that the strips 100 on the swing plates 503 fall into the discrete channels 502 together.

[0040] Among them, according to Figure 4 As shown, a step 506 that protrudes upward by no more than the thickness of one slat 100 is provided between each separation channel of the partition frame 501. The purpose of the step 506 is that after the slats 100 are stacked and placed above the first swing plate 503 on the left, the stacked slats 100 can be pushed to the right so that the step 506 will block the slats 100 at the bottom layer on the swing plate 503. In this way, in the process of pushing the slats 100 to the right, the stacked slats 100 will be placed in sequence on the swing plates 503 at different positions, thereby realizing the rapid placement of the slats 100.

[0041] according to Figure 6 As shown, it also includes: a fixing frame 5051 fixedly mounted on the toggle plate 505, a latch 5052 is slidably connected to the fixing frame 5051, the latch 5052 is kept sliding through the toggle plate 505 by a spring, and a retaining hole 5053 is opened on the side wall of the partition frame 501, the latch 5052 is inserted into the retaining hole 5053 to keep the swing plate 503 in a straight state, when placing the strip board 100, the latch 5052 can be inserted into the retaining hole 5053 to keep the swing plate 503 in a straight state, and after pulling out the latch 5052, the toggle plate 505 can be pushed to move.

[0042] according to Figure 3 , Figure 10-12 As shown, the triangular grinding roller 9 comprises: a triangular tube 91, one side of the triangular tube 91 is provided with a notch leading into the tube, a second grinding belt 92 is wound around the triangular tube 91, and a part of the second grinding belt 92 is inserted into the tube through the notch, a rotating shaft 93 is provided in the triangular tube 91, and the rotating shaft 93 in the tube is wrapped by the second grinding belt 92, and the rotating shaft 93 straightens and tightens the second grinding belt 92, so that the second grinding belt 92 is closely attached to the outer surface of the triangular tube 91, and edge sealing plates 95 are fixedly installed at both ends of the triangular tube 91, and the rotating shaft 93 rotates through the sealing plate The side plate 95 and the two ends of the triangular tube 91 are fixedly installed with sleeves 97, and the second motor 96 is fixedly installed in the sleeve 97. The output shaft of the second motor 96 is connected to the rotating shaft 93. The rotating shaft 93 is driven to rotate by the second motor 96, so that the second grinding belt 92 wrapped around the rotating shaft 93 is attached to the outer surface of the triangular tube 91 for transmission. The end of the sleeve 97 is fixedly installed with a connecting shaft 99, which is connected to the output shaft of the first motor 8 on both sides. The connecting shaft 99 is driven to rotate by the first motor 8, so that the triangular grinding roller 9 can rotate as a whole.

[0043] Among them, according to Fig.11 As shown, a heat dissipation channel 98 is opened on the sleeve 97 and runs through the inside and outside. When the second motor 96 in the sleeve 97 is working, the heat generated can be discharged through the heat dissipation channel 98, so that the second motor 96 maintains a normal working temperature.

[0044] Among them, according to Fig.12 As shown, three pressure rollers 94 are rotatably provided inside the triangular tube 91. The three pressure rollers 94 are evenly arranged around the rotating shaft 93 and are tightly attached to the surface of the second grinding belt 92. The second grinding belt 92 can be clamped by the cooperation of the pressure rollers 94 and the rotating shaft 93. In this way, the second grinding belt 92 will not easily slip on the rotating shaft 93 during the rotation of the rotating shaft 93.

[0045] Among them, according to Fig.12As shown, an intermediate brush plate 910 is provided at the notch of the triangular tube 91, and both ends of the intermediate brush plate 910 are fixedly connected to the edge sealing plate 95, so that the intermediate brush plate 910 is set at the notch, and according to the transmission direction of the second grinding belt 92, the intermediate brush plate 910 contacts the side of the second grinding belt 92 entering the tube, and the function of the intermediate brush plate 910 is to brush off and remove the more protruding particles attached to the second grinding belt 92, so as to prevent the impurity particles from adhering to the rotating shaft 93 during the contact with the rotating shaft 93, so as to avoid the problem of rotation slip caused by the particles between the rotating shaft 93 and the second grinding belt 92.

[0046] according to Figure 3 , Fig.13 and Fig.14 As shown, the clamp frame 11 includes: a fixed plate 111, the fixed plate 111 is connected to the linear drivers 10 on both sides, and a movable plate 112 is slidably installed on the fixed plate 111, and clamping blocks 113 are fixedly installed on the movable plate 112 and the fixed plate 111 at even intervals, and the clamping blocks 113 on the fixed plate 111 and the movable plate 112 are staggered and flush at the same height, and an electric push block 114 is fixedly installed on the fixed plate 111, and the movable end of the electric push block 114 is connected to the movable plate 112, so that the movable plate 112 is driven to slide by the electric push block 114, and then the clamping blocks 113 on the fixed plate 111 and the movable plate 112 are brought close to or separated from each other, and when a slat is placed between the clamping blocks 113, the slat can be clamped by driving the movable plate 112 to move by the electric push block 114.

[0047] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A PCB board burr grinding device, comprising: A base (1), on which a conveyor belt (2), a transmission device (3) and a support plate (4) are sequentially mounted; a first grinding belt (301), which is driven and mounted on the transmission device (3); and is characterized in that it also includes: the first grinding belt (301) is evenly spaced with concave grinding grooves (302); a separate mechanism (5), which is suspended above the conveyor belt (2), and the strip (100) falls on the conveyor belt (2) through the separate mechanism (5) and is kept in an upright state and aligned to be transported to the grinding groove (302) of the first grinding belt (301); a vertical holding frame (6), which is suspended above the first grinding belt (301), and the bottom of the vertical holding frame (6) is provided with a vertical channel (601) that matches and aligns with the grinding groove (302), and enters the grinding groove (302). The strips (100) of the grinding groove (302) are kept in an upright state through the upright passage (601); the lifting device (7) is installed on the side walls on both sides of the base (1); the first motor (8) is installed on the lifting output end of the lifting device (7); the triangular grinding roller (9) is connected to the first motor (8) at both ends and is installed between the transmission device (3) and the support plate (4) through the first motor (8) to block the strips (100) and grind the top of the strips (100); the linear drive (10) is installed on both sides of the support plate (4); the clamp frame (11) is driven and installed on the linear drives (10) on both sides, and the clamp frame (11) is used to clamp the strips (100) coming out of the first grinding belt (301).

2. The PCB board burring device according to claim 1, characterized in that: The separation mechanism (5) comprises: a partition frame (501) suspended above the conveyor belt (2), the partition frame (501) being provided with evenly spaced separation channels (502); a swing plate (503) having one side hingedly mounted on the top of the separation channel (502), the side wall of the separation channel (502) being provided with an arc-shaped guide groove (5031), the other end of the swing plate (503) being provided with a protrusion and being placed in the guide groove (5031). 31) so that the swing plate (503) swings up and down along the guide slot (5031), and the strip plate (100) is placed on the swing plate (503) and falls vertically into the discrete channel (502) as the swing plate (503) swings; a guide bevel (504) is installed in the discrete channel (502) and leaves a gap, and the gap position is aligned with the grinding groove (302); a toggle plate (505) is hinged to the swing plate (503).

3. The PCB board burring device according to claim 2, characterized in that: Also includes: A fixing frame (5051) is mounted on the toggle plate (505); a latch (5052) is movably mounted on the fixing frame (5051) and slides through the toggle plate (505); a retaining hole (5053) is provided on the side wall of the partition frame (501), and the toggle plate (505) is inserted into the retaining hole (5053) through the latch (5052) to keep the swing plate (503) in a straight state.

4. The PCB board burring device according to claim 3, characterized in that: A step (506) protruding upward by no more than the thickness of one strip board (100) is provided between each separation channel of the partition frame (501).

5. The PCB board burring device according to claim 1, characterized in that: The opening of the vertical channel (601) on the side facing the conveyor belt (2) is provided with an expanded bevel edge (602) for facilitating the entry of the strip board (100).

6. The PCB board burring device according to claim 4, characterized in that: The triangular grinding roller (9) comprises: a triangular tube (91) having one side with a notch for entering the tube; a second grinding belt (92) wound around the outside of the triangular tube (91) and partially inserted into the tube through the notch; a rotating shaft (93) disposed in the triangular tube (91) and wrapped by the second grinding belt (92) in the tube; an edge sealing plate (95) mounted at both ends of the triangular tube (91), the rotating shaft (93) rotating through the edge sealing plate (95); a second motor (96) having an output shaft connected to the rotating shaft (93); a sleeve (97) mounted at both ends of the triangular tube (91), the second motor (96) being disposed in the sleeve (97); and a connecting shaft (99) mounted at the ends of the sleeve (97), the connecting shafts (99) on both sides being connected to the output shaft of the first motor (8).

7. The PCB board burring device according to claim 6, characterized in that: Also includes: A plurality of pressure rollers (94) are provided, which are rotatably arranged inside the triangular tube (91) and closely attached to the surface of the second grinding belt (92).

8. The PCB board burring device according to claim 7, characterized in that: Also includes: A heat dissipation channel (98) is provided on the sleeve (97) so as to penetrate inside and outside.

9. The PCB board burring device according to claim 8, characterized in that: Also includes: The middle brush plate (910) is arranged at the notch of the triangular tube (91) and is in contact with the second grinding belt (92) on one side.

10. The PCB board burring device according to any one of claims 1 to 9, characterized in that: The clamp frame (11) comprises: a fixed plate (111) connected to the linear drive (10) on both sides; a movable plate (112) slidably mounted on the fixed plate (111); clamping blocks (113) respectively and evenly spaced and staggered mounted on the fixed plate (111) and the movable plate (112), the clamping blocks (113) on the fixed plate (111) and the movable plate (112) being flush with each other and at the same height; and an electric push block (114) mounted on the fixed plate (111) and driving the movable plate (112) to move, so that the clamping blocks (113) on the fixed plate (111) and the movable plate (112) are moved closer to or away from each other, thereby clamping the strip (100) coming out of the first grinding belt (301).

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