CN115946009A - Panel loading attachment and equipment of polishing thereof - Google Patents

Abstract

The utility model relates to a wood working's technical field, a panel loading attachment and equipment of polishing thereof is disclosed, panel loading attachment includes the base, install on the base and put the work or material rest, guiding mechanism, pushing equipment, first pre-grinding mechanism and second pre-grinding mechanism set up on guiding mechanism, feed inlet and discharge gate have been seted up respectively to the top and the bottom of putting the work or material rest, panel passes through the feed inlet and stacks in putting the work or material rest and fall out to guiding mechanism through the discharge gate on, pushing equipment is when panel is along the preceding propelling movement of guiding mechanism to polisher, two terminal surfaces of panel can be polished by first pre-grinding mechanism and second pre-grinding mechanism respectively. The equipment of polishing includes polisher and foretell panel loading attachment, and the polisher includes organism and feeding conveyer belt, and feeding conveyer belt butt can get into the feeding conveyer belt in first leading truck and second leading truck when panel is pushed out the propelling movement mouth, then is sent into the inside polishing of carrying out other four sides of polisher.

Description

Panel loading attachment and equipment of polishing thereof

Technical Field

The application relates to the technical field of wood processing, in particular to a plate feeding device and polishing equipment thereof.

Background

In the furniture production, a large amount of wood is needed as raw materials, the wood plates need to be conveyed into a grinding machine to be ground and polished in the processing process of the wood plates, and then the next operation can be carried out, particularly six surfaces of some decorative household products need to be ground. Traditional polisher material loading is in the manual work sends into the polisher with panel in proper order, needs operating personnel constantly to carry panel in polisher feed inlet department, wastes time and energy and inefficiency, adopts loading attachment to carry out the pay-off to the polisher now more.

Chinese patent with publication number CN217200859U discloses a panel automatic feeding device, which comprises a base, the district is placed to the top fixedly connected with panel of base, conveyor is installed to the lateral wall of base, conveyor includes first conveying roller, the second conveying roller and installs the conveyer belt between first conveying roller and second conveying roller, the conveyer belt surface is located the one side fixedly connected with profile of tooth friction disc that is close to first conveying roller, the top installation of second conveying roller is equipped with the material pushing clamp roller that installs in base inside. The device drives the conveying belt to rotate through the feeding motor, so that the plate at the bottom of the plate placing area is taken out through the tooth-shaped friction plate, and then the material pushing clamping roller is driven by the clamping roller motor to rotate in the opposite direction of the second conveying roller, so that the plate is pushed to a device of the next procedure.

Above-mentioned material feeding unit can improve pay-off efficiency, but the function is single, can not carry out some preliminary treatment to panel, and current polisher generally can carry out polishing on four sides simultaneously to panel at most, if need polish remaining two sides, then need 90 degrees rotatory panel, but polisher inner structure is compact, and needs the anchor clamps gripping surface of polishing when the upset, therefore panel is at rotatory in-process very easy wearing and tearing.

Disclosure of Invention

The application provides a panel loading attachment and equipment of polishing thereof has improved the defect of panel material feeding unit function singleness, and loading attachment can also polish to the two sides of panel in the material loading, and with panel rotate the back again send into the equipment of polishing in carry out polishing of four other faces, improved six efficiency of polishing.

In a first aspect, the present application provides a plate feeding device, which adopts the following technical scheme:

a sheet feeding device, comprising:

a base;

the material placing frame is arranged on the base and used for stacking the plates, and the top and the bottom of the material placing frame are respectively provided with a feeding hole and a discharging hole;

the guide mechanism comprises a first guide frame and a second guide frame which are oppositely arranged along the length direction of the base, the second guide frame comprises a straight line section and an arc section tangent to the straight line section, the circle center of the arc section is positioned on the first guide frame, the first guide frame is provided with a stop block at the circle center, and a material pushing port is formed between one end, far away from the straight line section, of the arc section and the first guide frame;

the material pushing mechanism is used for pushing the plate to pass through the guide mechanism and move towards the material pushing opening and can push the plate to rotate along the arc section;

the first pre-grinding mechanism is used for grinding the end face, facing the first guide frame, of the plate; and

and the second pre-grinding mechanism is used for grinding the end face of the plate facing the arc section.

Through adopting above-mentioned technical scheme, stack panel from the feed inlet and put the work or material rest in, panel falls out in proper order between first leading truck and second leading truck from the discharge gate, and pushing equipment makes panel move towards pushing away the material mouthful direction, and one end is kept out by the dog and the other end is followed the circular arc section and is rotated the back by the propelling movement play material mouth when panel gets into the circular arc section, so can improve material loading efficiency. When the plate moves in the straight section, one end face can be polished, and when the plate moves in the arc section, the other opposite end face can be polished, so that the two end faces can be polished, and finally the plate is sent out from the material pushing port.

Optionally, the first pre-grinding mechanism comprises a grinding strip arranged on the side wall of the first guide frame facing the second guide frame and a plurality of press wheels arranged on the straight section, and the press wheels are connected with a first driving assembly driving the press wheels to move in the direction of the first guide frame.

Through adopting above-mentioned technical scheme, when panel moved on the straightway, one side towards first leading truck was polished by the strip of polishing, and was pressed down panel toward the strip of polishing by the pinch roller that first drive assembly ordered about, thereby increased frictional force and made the effect that panel was polished better.

Optionally, the second pre-grinding mechanism is including arranging set up in a plurality of compression rollers and cover on the circular arc section are located a plurality of the area of polishing on the compression roller, the compression roller is connected with and orders about the compression roller toward the second drive assembly and the drive that the centre of a circle direction of circular arc section removed the third drive assembly of axle center rotation is followed to the compression roller.

Through adopting above-mentioned technical scheme, pushing equipment pushes away panel in the circular arc section, thereby third drive assembly drive the compression roller rotate drive the area of polishing rotate, the area of polishing can drive panel and move on the circular arc section, panel is polished by the area of polishing towards one side of second leading truck this moment, thereby and the compression roller ordered about by second drive assembly can be with the area of polishing towards panel on press down the terminal surface that makes panel can be polished by the area of polishing, thereby still increased frictional force and make the effect that panel was polished better.

Optionally, the pushing mechanism includes a fixed rail disposed along the length direction of the base and a sliding rail connected to the fixed rail, the sliding rail is connected to a fourth driving assembly for driving the sliding rail to reciprocate along the length direction of the fixed rail, and a plurality of pushing members are arranged in an array along the length direction on one side of the sliding rail facing the guiding mechanism.

By adopting the technical scheme, the fourth driving component drives the sliding rail to reciprocate along the fixed rail in the direction close to or far away from the material pushing port, so that the pushing piece is driven to sequentially push the plate in the direction of the material pushing port.

Optionally, the pushing element includes an articulated seat disposed on the sliding rail and a push rod articulated with the articulated seat, the push rod is used for pushing the plate to move toward the material pushing opening, and the push rod is connected with a reset element for driving the push rod to reset.

Through adopting above-mentioned technical scheme, when the impeller moved toward pushing away the material mouthful direction, the push rod butt promoted panel, when the impeller moved toward the direction of keeping away from pushing away the material mouthful, articulated push rod tip can break away from panel, thereby the piece that resets at this moment orders about the push rod and resets to the tip and can the butt next panel carry out the propelling movement.

Optionally, a first shaft lever penetrates through the vertical middle part of the pressing wheel, and the pressing wheel can rotate along the axis.

By adopting the technical scheme, the pressing wheel can extrude the plate to enable the other end of the plate to be abutted against the grinding strip, and in the moving process of the plate, the pressing wheel can rotate to reduce the friction force between the plate and the contact end of the pressing wheel, so that the pushing mechanism can push the plate better.

Optionally, a first connecting rod is connected between two adjacent first shafts.

Through adopting above-mentioned technical scheme, the pinch roller receives the direction of ordering about toward first leading truck of third drive assembly to remove, and the distance between pinch roller surface and the first leading truck can be less than the length of panel, and when present pinch roller was supported by panel and is pressed the direction removal of keeping away from first leading truck, adjacent pinch roller produced through the drawing of first connecting rod and removes to increase and the distance between the first leading truck, reduced panel and blocked and the unable possibility that removes by the pinch roller.

Optionally, a second shaft lever is inserted in the middle of the end face of the press roll, which is far away from the rotating assembly, and a second connecting rod is connected between every two adjacent second shaft levers.

Through adopting above-mentioned technical scheme, equally, also be connected with the second connecting rod that can pull between the adjacent compression roller, reduced panel by the compression roller when moving on the circular arc section block and the possibility that can't remove.

The second aspect, this application provides a equipment of polishing, adopts following technical scheme:

including polisher and foretell panel loading attachment, the polisher includes the organism and stretches out the feeding conveyer belt of organism, feeding conveyer belt butt in first leading truck with the second leading truck is located the tip of pushing away material mouthful department, feeding conveyer belt's direction of transfer with first leading truck is parallel.

Through adopting above-mentioned technical scheme, can get into the feeding conveyer belt when panel is pushed out the material pushing opening, be sent into the inside polishing of polisher through the feeding conveyer belt. And the polisher that has above-mentioned panel loading attachment need not operating personnel and constantly carries panel at polisher feed inlet department, has reduced operating personnel's work load, has improved panel efficiency of polishing, can also polish six of panel all.

Optionally, the polisher further includes a leveling mechanism, the leveling mechanism includes a leveling rod disposed on the top surface of the feeding conveyor belt and parallel to the first guide frame, and a fifth driving assembly for driving the leveling rod to reciprocate along a direction perpendicular to the conveying direction of the feeding conveyor belt.

Through adopting above-mentioned technical scheme, the panel that sends out after the rotation of follow circular arc section probably can not be completely parallel with direction of transfer, and levelling mechanism can adjust into suitable state so that the polisher polishes with panel.

In summary, the present application includes at least one of the following benefits:

1. through the feeding device, operators do not need to continuously carry the plates at the feeding port of the polishing machine, so that the workload of the operators is reduced, and the working efficiency of polishing the plates is improved;

2. the feeding device can polish two surfaces of the plate while feeding, and the plate is rotated by 90 degrees and then sent into the polishing machine to polish the other four surfaces, so that the six-surface polishing efficiency is improved;

3. through the pressing effect of the pressing wheel and the pressing roller, the friction force between the plate and the grinding strip and the grinding belt can be increased respectively, so that the grinding effect of two end surfaces of the plate is improved, and the plate is ground more smoothly;

4. through the compaction of pinch roller and compression roller, panel can reach good effect of polishing in shorter migration distance, has reduced the occupation of land space of whole equipment, has practiced thrift the place cost in workshop.

Drawings

FIG. 1 is a schematic structural diagram of a plate feeding device in embodiment 1 of the present application;

FIG. 2 is a schematic structural view of a guide mechanism and a pusher mechanism in embodiment 1 of the present application;

FIG. 3 is a sectional view of a first pre-grinding mechanism in embodiment 1 of the present application;

FIG. 4 is a sectional view of a second pre-grinding mechanism in embodiment 1 of the present application;

fig. 5 is a schematic structural view of a grinding apparatus in embodiment 2 of the present application.

Reference numerals are as follows: 1. a base; 11. a guide plate; 2. a material placing frame; 21. a feed inlet; 22. a discharge port; 3. a guide mechanism; 31. a first guide frame; 311. a stopper; 32. a second guide frame; 321. a straight line segment; 322. a circular arc section; 33. pushing a material port; 4. a material pushing mechanism; 41. fixing a track; 42. a slide rail; 43. a fourth drive assembly; 431. a second motor; 432. a third link; 433. a fourth link; 44. a pusher member; 441. a hinged seat; 442. a push rod; 443. a reset member; 5. a first pre-grinding mechanism; 51. polishing the strips; 52. a pinch roller; 521. a first shaft lever; 522. a first guide post; 523. a circular hole; 524. a waist-shaped hole; 53. a first drive assembly; 54. a first link; 55. a second guide post; 6. a second pre-grinding mechanism; 61. polishing the belt; 62. a compression roller; 621. a second shaft lever; 63. a second drive assembly; 64. a third drive assembly; 641. a rotating shaft; 642. a first motor; 65. a second link; 7. a sander; 8. a feed conveyor; 9. a leveling mechanism; 91. leveling the rods; 92. and a fifth drive assembly.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

Example 1:

referring to fig. 1, the embodiment of the application discloses a panel loading attachment, including base 1, install on base 1 and put work or material rest 2, guiding mechanism 3, pushing equipment 4, first pre-grinding mechanism 5 and second pre-grinding mechanism 6 set up on guiding mechanism 3, feed inlet 21 and discharge gate 22 have been seted up respectively to the top and the bottom of putting work or material rest 2, panel passes through feed inlet 21 and stacks in putting work or material rest 2 and falls out to guiding mechanism 3 through discharge gate 22 on, pushing equipment 4 is with panel along guiding mechanism 3 forward propelling movement to the equipment of polishing in, two terminal surfaces of panel can be polished by first pre-grinding mechanism 5 and second pre-grinding mechanism 6 respectively.

Referring to fig. 1 and 2, the guide mechanism 3 includes a first guide frame 31 and a second guide frame 32 which are oppositely disposed along the length direction of the base 1 and respectively fixed to the inner walls of the two sides of the base 1; the first guide frame 31 is in a linear strip shape, the second guide frame 32 comprises a linear section 321 and an arc section 322 tangent to the linear section 321, the circle center of the arc section 322 is located on the first guide frame 31, the tangent point and the circle center are connected to form a straight line which is perpendicular to the first guide frame 31, a stop block 311 is arranged at the circle center of the first guide frame 31, and the stop block 311 is in a semi-cylindrical shape; the material pushing opening 33 is formed between one end of the circular arc section 322 far away from the straight section 321 and the first guiding frame 31. The material placing frame 2 is vertically arranged above the first guide frame 31 and the second guide frame 32 and located at one end far away from the arc section 322, the material placing frame 2 is preferably fixed on the base 1 so that the structure is more stable, the distance between the bottom surface of the material placing frame 2 and the top surface of the first guide frame 31 is not less than the thickness of one plate and is preferably set to be less than the thickness of two plates, the two ends of the plate fall down from the material outlet 22 and are respectively erected on the first guide frame 31 and the second guide frame 32, when the plate is pushed to the stop block 311 by the material pushing mechanism 4 and moves continuously, one end of the plate is blocked by the stop block 311, the other end of the plate moves continuously along and in the arc section 322 to the blocked end to be separated from the stop block 311, at the moment, the plate can move continuously, and therefore reversing of the plate is achieved.

Referring to fig. 1 and 3, the first pre-grinding mechanism 5 includes a grinding strip 51, the surface of the grinding strip 51 may be configured as sandpaper, sisal, or hard brush, the first guide frame 31 may be configured as an L-shape for facilitating installation of the grinding strip 51, and the grinding strip 51 is adhesively disposed on a sidewall of the first guide frame 31 facing the second guide frame 32. Further, in order to improve the polishing effect, the first pre-polishing mechanism 5 further includes a plurality of pressing wheels 52 arranged on the straight-line segments 321, the pressing wheels 52 are connected to a first driving assembly 53 for driving the pressing wheels 52 to move toward the first guiding frame 31, and when the pressing wheels 52 are in an initial state, the distance between the pressing wheels 52 and the first guiding frame 31 is smaller than the length of the plate.

Referring to fig. 3, the pressing wheel 52 may be mounted on the second guide frame 32, specifically, a first shaft rod 521 is disposed in the vertical middle of the pressing wheel 52 in a penetrating manner, and the pressing wheel 52 can rotate along the axis to reduce the friction force between the plate and the contact end of the pressing wheel 52, so that the plate can move; a strip-shaped hole along the moving direction of the pressing wheel 52 is formed in the second guide frame 32, the lower end of the pressing wheel 52 abuts against the surface of the second guide frame 32, and the first shaft rod 521 penetrates through the strip-shaped hole and can move in the strip-shaped hole in a matched mode. The first driving assembly 53 includes a first elastic member, which may be a rubber pad or a spring, disposed corresponding to the first shafts 521 and connected between the inner wall of the base 1 and the first shafts 521, and the first elastic member drives the first shafts 521 to move toward the second guiding frame 32.

Referring to fig. 3, further, in order to improve the stability that pinch roller 52 moved when being driven by first elastic component, be provided with deflector 11 on base 1's the inner wall, the diapire of deflector 11 and pinch roller 52's top end face butt have seted up the bar hole along pinch roller 52 moving direction on the deflector 11, and bar hole and can be in the downthehole cooperation removal of bar are worn to establish by primary shaft pole 521. The position that the both ends of first axostylus axostyle 521 correspond to the bar hole is provided with the guide block perpendicular with pinch roller 52 direction of movement, and the gliding guide way that just communicates in the bar hole of confession guide block has all been seted up to second leading truck 32 and deflector 11. In addition, the first elastic member is preferably provided as a spring, the end of the first shaft 521 is connected with the first guide post 522, the base 1 is provided with a second guide post 55 corresponding to the first guide post 522, and two ends of the spring are respectively sleeved on the first guide post 522 and the second guide post 55.

The surface of pinch roller 52 may also be frosted to roughen the end of the sheet away from the grinding bar 51, and in this embodiment pinch roller 52 is preferably provided with a smooth surface to reduce the possibility of the sheet getting stuck due to the higher friction at both ends.

Referring to fig. 3, in order to further reduce the possibility that the pressing wheel 52 blocks the movement of the plate, a first connecting rod 54 is sleeved between two adjacent first shaft rods 521; holes for sleeving the first shaft rod 521 at two ends of the first connecting rod 54 are respectively provided as a round hole 523 and a waist-shaped hole 524, when the previous pressing wheel 52 is pressed by the plate to move in the direction far away from the first guide frame 31, the adjacent pressing wheel 52 moves by the traction of the first connecting rod 54, so that the distance between the adjacent pressing wheel 52 and the first guide frame 31 is increased to facilitate the plate to enter.

Referring to fig. 1 and 4, the second pre-grinding mechanism 6 includes a plurality of pressing rollers 62 arranged on the arc section 322 of the second guiding frame 32, and a grinding belt 61 sleeved on the plurality of pressing rollers 62, and the pressing rollers 62 are connected to a second driving assembly 63 for driving the pressing rollers 62 to move toward the center of the arc section 322, and a third driving assembly 64 for driving the pressing rollers 62 to rotate along the axis. The surface of the polishing belt 61 can be set to be sand paper, sisal hemp or hard brush, the inner surface of the polishing belt 61 and the outer surface of the compression roller 62 are provided with an inner rack and an outer rack which are meshed with each other, the third driving assembly 64 comprises a rotating shaft 641 and a first motor 642 which are arranged along the axis of the compression roller 62 and fixedly connected, the rotating shaft 641 is connected to the output end of the first motor 642, the third driving assembly 64 drives the compression roller 62 to rotate so as to drive the polishing belt 61 to rotate, and the polishing belt 61 can drive a plate to move on the arc section 322 and polish simultaneously. Offer the bar hole along the compression roller 62 moving direction on the second leading truck 32, compression roller 62 lower extreme butt in the surface of second leading truck 32, axis of rotation 641 wears to establish the bar hole and can move in the downthehole cooperation of bar. The terminal surface middle part that axis of rotation 641 was kept away from to compression roller 62 is inserted and is equipped with second axostylus axostyle 621, second drive assembly 63 is including setting up and connecting the second elastic component between base 1 inner wall and second axostylus axostyle 621 corresponding to a plurality of second axostylus axostyles 621, the second elastic component can be rubber pad or spring, the second elastic component orders about the second axostylus axostyle 621 and removes toward the centre of a circle direction of circular arc section 322, thereby the compression roller 62 driven by the second elastic component can be with the terminal surface that makes panel can be polished by the area of polishing 61 towards panel up to press down, thereby still increased frictional force and make the effect that panel was polished better.

Referring to fig. 4, in order to further reduce the possibility that the pressing wheel 52 blocks the movement of the board, a second connecting rod 65 is sleeved between two adjacent second shaft levers 621; the holes at the two ends of the second link 65 for the second shaft 621 to be sleeved are respectively configured as a round hole and a waist-shaped hole.

Referring to fig. 2, the pushing mechanism 4 is used for pushing the plate to pass through the guiding mechanism 3 and move toward the material pushing opening 33, and can push the plate to rotate along the arc section 322. Specifically, the pushing mechanism 4 includes a fixed rail 41 arranged along the length direction of the base 1 and a sliding rail 42 connected to the fixed rail 41, the fixed rail 41 is fixed in the base 1, and the sliding rail 42 is connected with a fourth driving assembly 43 for driving the sliding rail 42 to reciprocate along a direction close to or far away from the material pushing port 33; the fourth driving assembly 43 includes a second motor 431 fixed on the base 1, a third connecting rod 432 connected to an output end of the second motor 431, and a fourth connecting rod 433 hinged to an end of the third connecting rod 432 away from the second motor 431, wherein an end of the fourth connecting rod 433 away from the third connecting rod 432 is hinged to the sliding track 42. A plurality of pushing pieces 44 are arranged in an array along the length direction on one side of the sliding rail 42 facing the guide mechanism 3; push piece 44 is including setting up articulated seat 441 on sliding rail 42 and with articulated seat 441 articulated push rod 442, tip and panel butt when push rod 442 rotates to vertical state, and the one side that push rod 442 tip was kept away from with the panel butt sets up to the fillet so that push rod 442 breaks away from panel after rotating when moving towards the direction of keeping away from material pushing mouth 33, be provided with spacing strip on articulated seat 441 and continue to rotate towards material pushing mouth 33 direction after keeping away from panel with restriction push rod 442, push rod 442 is connected with the reset piece 443 that drives push rod 442 and reset to vertical state, reset piece 443 can set up the reset rod who is connected with push rod 442, the weight of reset rod is greater than the weight of push rod 442, and push rod 442 is in vertical state when reset rod and sliding rail 42's surface butt.

The implementation principle of the plate feeding device in the embodiment of the application is as follows:

plates are stacked into the material placing frame 2 from the material inlet 21 and then fall out between the first guide frame 31 and the second guide frame 32 from the material outlet 22 under the action of gravity, the second motor 431 drives the sliding rail 42 to slide along the fixed rail 41 in a reciprocating manner through the third connecting rod 432 and the fourth connecting rod 433, so that the push rods 442 of the array are driven to intermittently move the plates to the material pushing port 33 in sequence, at the moment, one end of each plate is polished by the polishing strip 51, and the other end of each plate is pressed by the pressing wheel 52 to increase the friction force between each plate and the polishing strip 51; when a plate enters the arc section 322, one polished end is blocked by the block 311, the other end rotates along the arc section 322, the first motor 642 drives the press roller 62 to rotate so as to drive the polishing belt 61 to rotate, when the push rod 442 is separated from the plate, the polishing belt 61 can drive the plate to continuously move and polish the plate simultaneously, the press roller 62 driven by the second elastic part can press the polishing belt 61 onto the plate so as to polish the end face of the plate, and friction force is increased so as to achieve a better plate polishing effect; finally, the plate is pushed out from the pushing port 33.

Example 2:

referring to fig. 5, the embodiment of the present application discloses a polishing apparatus, including a polishing machine 7 and the above-mentioned plate feeding device, the polishing machine 7 includes a machine body and a feeding conveyor belt 8 extending out of the machine body, a conveying direction of the feeding conveyor belt 8 is parallel to the first guide frame 31, the feeding conveyor belt 8 abuts against end portions of the first guide frame 31 and the second guide frame 32 located at the material pushing port 33, when a plate is pushed out of the material pushing port 33, the plate enters the feeding conveyor belt 8, and is sent into the polishing machine 7 through the feeding conveyor belt 8 for polishing.

The sheet material fed after rotating from the circular arc section 322 may not be completely parallel to the conveying direction, so the polishing machine 7 further includes a leveling mechanism 9, the leveling mechanism 9 includes a leveling rod 91 disposed on the top surface of the feeding conveyor belt 8 and parallel to the first guide frame 31, and a fifth driving assembly 92 for driving the leveling rod 91 to reciprocate along the direction perpendicular to the conveying direction of the feeding conveyor belt 8, and the fifth driving assembly 92 may be configured as an air cylinder or a hydraulic cylinder.

The implementation principle of the polishing equipment in the embodiment of the application is as follows:

the feeding device can polish two surfaces of the plate while feeding, the plate is rotated and then is conveyed to the feeding conveyor belt 8 from the material pushing port 33, the fifth driving assembly 92 drives the flattening rod 91 to reciprocate, so that the plate is adjusted to be in a proper state, the feeding conveyor belt 8 conveys the plate into the polisher 7 to polish the other four surfaces, and six-surface polishing efficiency is improved.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A panel loading attachment, its characterized in that includes:

a base (1);

the material placing frame (2) is arranged on the base (1) and used for stacking plates, and a feeding hole (21) and a discharging hole (22) are respectively formed in the top and the bottom of the material placing frame (2);

the guide mechanism (3) comprises a first guide frame (31) and a second guide frame (32) which are oppositely arranged along the length direction of the base (1), the second guide frame (32) comprises a straight line section (321) and an arc section (322) which is tangent to the straight line section (321), the circle center of the arc section (322) is located on the first guide frame (31), a stop block (311) is arranged at the circle center of the first guide frame (31), and a material pushing opening (33) is formed between one end, far away from the straight line section (321), of the arc section (322) and the first guide frame (31);

the pushing mechanism (4) is used for pushing the plate to pass through the guide mechanism (3) and move towards the material pushing opening (33) and can push the plate to rotate along the arc section (322);

the first pre-grinding mechanism (5) is used for grinding the end face, facing the first guide frame (31), of the plate; and

and the second pre-grinding mechanism (6) is used for grinding the end face, facing the arc section (322), of the plate.

2. A feeding device for boards as claimed in claim 1 wherein the first pre-grinding mechanism (5) comprises a grinding strip (51) disposed on the side wall of the first guiding frame (31) facing the second guiding frame (32) and a plurality of pressing wheels (52) arranged on the straight section (321), the pressing wheels (52) are connected to a first driving assembly (53) for driving the pressing wheels (52) to move towards the first guiding frame (31).

3. The board feeding device according to claim 1, wherein the second pre-grinding mechanism (6) comprises a plurality of pressing rollers (62) arranged on the circular arc section (322) in an arrayed manner and a grinding belt (61) sleeved on the plurality of pressing rollers (62), and the pressing rollers (62) are connected with a second driving assembly (63) for driving the pressing rollers (62) to move towards the center of the circular arc section (322) and a third driving assembly (64) for driving the pressing rollers (62) to rotate along the axis.

4. A plate feeding device according to claim 1, wherein the pushing mechanism (4) comprises a fixed rail (41) arranged along the length direction of the base (1) and a sliding rail (42) connected to the fixed rail (41), the sliding rail (42) is connected to a fourth driving assembly (43) for driving the sliding rail (42) to reciprocate along the length direction of the fixed rail (41), and a plurality of pushing members (44) are arranged in a length direction array on the side of the sliding rail (42) facing the guiding mechanism (3).

5. A device for feeding sheets as claimed in claim 4, wherein said pushing element (44) comprises a hinged seat (441) disposed on said sliding track (42) and a push rod (442) hinged to said hinged seat (441), said push rod (442) is used for pushing the sheet to move towards said feeding opening (33), said push rod (442) is connected with a resetting element (443) for resetting said push rod (442).

6. A plate feeding device according to claim 2, wherein a first shaft rod (521) is arranged in the middle of the vertical direction of the pressing wheel (52), and the pressing wheel (52) can rotate along the shaft center.

7. A sheet feeding device according to claim 6, wherein a first connecting rod (54) is connected between two adjacent first shafts (521).

8. A board feeding device according to claim 3, wherein a second shaft rod (621) is inserted in the middle of the end surface of the pressing roller (62) far away from the rotating assembly, and a second connecting rod (65) is connected between two adjacent second shaft rods (621).

9. A sanding apparatus, characterized by comprising a sander (7) and a panel loading apparatus according to any one of claims 1 to 8, the sander (7) comprising a body and a feed conveyor (8) extending out of the body, the feed conveyor (8) abutting against the ends of the first guide frame (31) and the second guide frame (32) at the feed opening (33), the feed conveyor (8) having a conveying direction parallel to the first guide frame (31).

10. A sanding apparatus according to claim 9, characterized in that the sander (7) further comprises a flattening mechanism (9), the flattening mechanism (9) comprising a flattening bar (91) arranged on the top surface of the infeed conveyor belt (8) and parallel to the first guide frame (31), and a fifth drive assembly (92) for driving the flattening bar (91) to reciprocate perpendicular to the direction of conveyance of the infeed conveyor belt (8).

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