CN109822405B

CN109822405B - Blade grinding device

Info

Publication number: CN109822405B
Application number: CN201910264843.5A
Authority: CN
Inventors: 张千
Original assignee: Individual
Current assignee: Huaian Tianda Medical Instruments Co ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2024-03-01
Anticipated expiration: 2039-04-03
Also published as: CN109822405A

Abstract

The invention relates to the field of sharpening equipment, and discloses a blade sharpening device, wherein N stations on a rack are positioned on N station outer rings on a turntable and correspond to each other one by one; the turntable is horizontally connected to the frame through a rotating shaft, the bottom end of the rotating shaft is connected with a first driving motor, and the top end of the rotating shaft penetrates through the center of the turntable and then extends to the upper part of the turntable; each grinding wheel component is sequentially fixed on a station on the surface of the frame and corresponds to the position of each clamp one by one; the feeding and discharging components are respectively arranged on two stations on the frame, and the two stations are not provided with grinding wheel components; the rotary clamping hand assembly is arranged on the frame, is positioned at the same station with the feeding assembly and is positioned between the feeding assembly and the clamp; from the first station to the last station, the distance between the bottom of the grinding wheel and the edge opening surface of the corresponding blade to be ground is sequentially decreased. The device can grind a plurality of blades simultaneously, adopts a progressive grinding mode, has accurate grinding precision control, and greatly improves the qualification rate and the working efficiency.

Description

Blade grinding device

Technical Field

The invention relates to the field of knife sharpening equipment, in particular to a blade sharpening device.

Background

At present, the cutting tool is a primary procedure of a cutting tool manufacturing process, but at present, the cutting tool is manually cut by a plane grinder or a planer iron for large batch cutting tools, and the fine grinding is performed by a common grinding wheel or manual grinding, so that the manual mode is time-consuming and labor-consuming, and particularly, the grinding of an appliance with a certain curve radian, a fixed included angle and two symmetrical sides needs to be manually controlled, the mode leads to higher defective rate, not only increases the labor cost of enterprises, but also reduces the production efficiency; there are also many mechanical grinding devices in the market, and most of the mechanical grinding devices grind the cutting edge of the cutting die to a required angle and thickness at one time, and because a great amount of heat can be generated when the grinding wheel grinds the cutting edge, the disposable grinding mode easily causes cutting edge fracture, the rejection rate is increased, and the grinding precision cannot be ensured for products with higher precision requirements such as surgical knives.

Disclosure of Invention

The invention aims to: aiming at the problems in the prior art, the invention provides the blade grinding device which can grind a plurality of blades at the same time, adopts a progressive grinding mode, has accurate grinding precision control and greatly improves the qualification rate and the working efficiency.

The technical scheme is as follows: the invention provides a blade grinding device which comprises a frame, a rotary table, a first driving motor, a feeding assembly, a rotary clamping assembly, a discharging assembly, N clamps, N telescopic mechanical arm assemblies and at most N-2 grinding wheel assemblies, wherein the surface of the frame and the rotary table are provided with N stations which are uniformly arranged on the circumference; the N stations on the frame are positioned on the outer rings of the N stations on the turntable and are in one-to-one correspondence; the rotary table is horizontally connected to the frame through a rotary shaft in a rotary mode, the bottom end of the rotary shaft is connected with the output end of the first driving motor, and the top end of the rotary table penetrates through the center of the rotary table and then extends to the upper portion of the rotary table; the middle parts of the telescopic mechanical arm assemblies are respectively fixed on N stations on the rotary table, the initial ends of the telescopic mechanical arm assemblies are fixed at the free ends of the rotary shafts, and the tail ends of the telescopic mechanical arm assemblies are fixed with the clamps which are horizontally arranged; each grinding wheel assembly is sequentially fixed on a station on the surface of the frame and corresponds to the position of each clamp one by one; the feeding assembly and the discharging assembly are respectively arranged on two stations on the frame, on which the grinding wheel assembly is not arranged; the rotary clamping hand assembly is arranged on the frame, is positioned at the same station as the feeding assembly and is positioned between the feeding assembly and the clamp; from the first station to the last station, the distance between the bottom of the grinding wheel in each grinding wheel assembly and the edge opening surface of the blade to be ground in each corresponding fixture is sequentially decreased.

Further, the blade grinding device also comprises blade position correction blocks fixed on the frame, the number of the grinding wheel assemblies is at most N-3, the rotary clamping assembly, the blanking assembly and the photoelectric assembly are respectively arranged on three stations on the frame, the grinding wheel assemblies are not arranged on the stations, and the blade position correction blocks are positioned between the grinding wheel assemblies and the rotary clamping assemblies. The blade position correction block is used for detecting whether the position of the blade to be ground clamped by the clamp is accurate or not before the telescopic mechanical part assembly moves the clamp clamping the blade to be ground to the station of the first grinding wheel assembly, and because the position of the blade to be ground clamped by the clamp directly affects the subsequent grinding position, grinding angle and thickness, the blade position correction block is arranged before the blade to be ground is ground to detect the position of the blade to be ground.

Preferably, the feeding assembly comprises a blade stacking frame, a moving plate and a second driving motor, the moving plate is in sliding connection with the frame, a conveying groove is formed in the surface of the moving plate, the blade stacking frame is vertically fixed on the frame and located above the conveying groove by a preset distance, and an output shaft of the second driving motor is in rotary connection with the bottom of the moving plate and used for driving the moving plate to do reciprocating rectilinear motion. The to-be-sharpened chips are stacked on the blade stacking frame, the to-be-sharpened chip positioned at the lowest part is fallen into the conveying groove, then the moving plate drives the to-be-sharpened chip positioned in the conveying groove to move to the position of the rotary clamping assembly under the driving of the second driving motor, the rotary clamping assembly clamps the to-be-sharpened chip to realize the operation of taking materials from the feeding assembly, then the second driving motor drives the moving plate to move reversely, the second to-be-sharpened chip falls into the conveying groove, and meanwhile, the rotary clamping assembly rotates by an angle to wait for the next to-be-sharpened chip to be clamped to be conveyed along with the conveying groove of the moving plate; in the same manner as described above, the feeding assembly continuously conveys the blade to be sharpened to the rotary jaw assembly.

Preferably, a preset distance between the bottom of the conveying groove and the bottom end of the blade stacking frame is greater than the thickness of the blade to be ground and less than twice the thickness of the blade to be ground. The purpose of design is in order to guarantee that the blade that carries the recess at every turn is a blade, avoids influencing the normal clear of follow-up process.

Preferably, the rotary clamping assembly comprises a feeding disc, a third driving motor and at least one feeding clamping hand, wherein the circumferences of the feeding clamping hands are uniformly distributed on the edge of the feeding disc, and an output shaft of the third driving motor is rotationally connected with the bottom of the feeding disc and used for driving the feeding disc to do circular motion. The feeding disc is driven to rotate by the third driving motor, the feeding clamp rotates along with the feeding disc, and when the feeding clamp rotates by one station angle, one feeding clamp is located at the station of the feeding assembly, one to-be-sharpened blade in the feeding assembly can be clamped, then the clamping clamp rotates by one station, and the clamped to-be-sharpened blade can be inserted into the clamp at the end part of the telescopic mechanical arm assembly to be clamped and positioned by the clamp.

Preferably, the blanking assembly comprises a blanking disc, a fourth driving motor, a blade recovery assembly and at least one blanking clamp, wherein the circumferences of the blanking clamps are uniformly distributed on the edge of the blanking disc, and an output shaft of the fourth driving motor is rotationally connected with the bottom of the blanking disc and is used for driving the blanking disc to do circular motion; the blade recovery assembly is arranged on the frame and located at a station on one side of the blanking disc. When the fourth driving motor drives the blanking plate to rotate for one station, a blanking clamp is rotated to be connected with one station on the rotating plate, at the moment, the blanking clamp can clamp the grinded blade in the clamp at the end part of the telescopic mechanical arm assembly on the station, and when the fourth driving motor rotates for one station, the blanking clamp can rotate and move the clamped blade to the blade recovery assembly, so that the blade is recovered.

Preferably, the blade recovery assembly comprises an air cylinder, a bottom plate and two stacking rods, wherein the two stacking rods are parallel to each other and are vertically fixed on the bottom plate, the bottom plate is connected with the frame in a sliding mode, the air cylinder is fixed on the frame, and a telescopic rod of the air cylinder is fixedly connected with one side of the bottom plate and used for driving the bottom plate to do reciprocating rectilinear motion. The cylinder can drive the bottom plate to do reciprocating linear motion, when one of the stacking rods is covered with the blade, the cylinder drives the bottom plate to move, the stacking rod covered with the blade moves out of the station of the blanking assembly, meanwhile, the empty stacking rod is moved to the station of the blanking assembly, then the stacking rod covered with the blade is emptied manually, and after waiting for the empty stacking rod to be covered with the blade, the cylinder drives the stacking rod to be driven to the station of the blanking assembly again.

Preferably, the grinding wheel assembly comprises a base, a grinding wheel and a fifth driving motor, wherein the base is fixed on the frame, the fifth driving motor is fixed on the base, and an output shaft of the fifth driving motor is rotationally connected with the center of the grinding wheel and is used for driving the grinding wheel to move circularly; the rotating surface of each grinding wheel is perpendicular to and above the plane of the corresponding clamp. The fifth driving motor drives the grinding wheel to rotate, so that the cutting edge of the blade to be ground, which is positioned below the grinding wheel and forms a preset included angle with the grinding wheel, is ground.

Further, the grinding wheel assembly further comprises a profiling column with the same shape as the cutting edge of the blade to be sharpened, and the profiling column is fixed on one side of the base; the telescopic mechanical arm assembly comprises a base, a sliding block, a spring rod and a profiling block, wherein the base is fixed on the turntable, the sliding block is connected to the upper surface of the base in a sliding way, the clamp is fixed at the tail end of the sliding block, the initial end of the spring rod is fixed at the free end of the rotating shaft, the tail end of the spring rod is connected with the initial end of the sliding block, and the profiling block is fixed at the tail end of the sliding block and below the clamp; the profiling column is in contact with the curved surface of the profiling block when the clamp is positioned below the grinding wheel. The design of the profiling column, the profiling block and the spring rod is mainly used for solving the problem that the cutting edge of the blade to be ground is in a curve shape by using the device, when the blade to be ground is ground by using the blade to be ground in the curve shape, the shape of the profiling block is identical to or matched with the curve of the cutting edge, so when the profiling column is in contact with the profiling block, the spring rod is extruded or bounces back due to the extrusion of the profiling column to the profiling block, and the sliding block drives the profiling block to slide along the base in the direction close to or far away from the center of the turntable, so that the blade to be ground with the curve-shaped cutting edge is ground.

Preferably, the grinding wheel assembly further comprises a cooling water mechanism, the cooling water mechanism is fixed on the base, and when the clamp is positioned below the grinding wheel, a water outlet of the cooling water mechanism is opposite to a contact point of the cutting edge of the blade to be ground and the grinding wheel. Because the grinding wheel generates a large amount of heat when grinding the blade to be ground, each grinding wheel component is provided with a cooling water mechanism, and when the grinding wheel grinds the blade to be ground, the cooling water mechanism can spray water to the contact point of the cooling water mechanism and the blade to be ground to cool the contact point, so that the product scrapping caused by overhigh temperature of the cutting edge of the blade to be ground is avoided.

Working principle and beneficial effect: when the grinding port device is used for grinding a blade to be ground, the blade to be ground is stacked in the feeding assembly, the feeding assembly and the rotary clamping hand assembly are started, the rotary clamping hand assembly can clamp the blade to be ground out of the feeding assembly, then the blade to be ground is rotated to a position on the rotary table, the blade to be ground is inserted into a clamp at the end part of the telescopic mechanical arm assembly at the position, the clamp clamps the blade to be ground and then rotates to the position of the first grinding wheel assembly along with the rotation of the clamp to grind, after the first grinding wheel assembly grinds, the rotary table drives the telescopic mechanical arm assembly to rotate by an angle, so that the clamp rotates to the position of the second grinding wheel assembly, secondary grinding is carried out on the blade to be ground through the second grinding wheel assembly, and then the telescopic mechanical arm assembly drives the clamp to convey the grinded blade to the position of the blanking assembly along with the rotation of the rotary table again by an angle, and the blanking assembly again takes away the grinded blade to collect.

In the grinding device, when the turntable rotates for one angle, one telescopic mechanical arm assembly drives one clamp to rotate to one station of the feeding assembly, and meanwhile, one telescopic mechanical arm assembly drives one clamp to rotate to one station of the discharging assembly, and the rest telescopic mechanical arm assemblies are respectively positioned at stations of all grinding wheel assemblies; the distance between the bottom of each grinding wheel and the edge opening surface of the blade to be ground in each corresponding clamp is gradually decreased from the first station to the last station, so that the edge opening surface of the blade to be ground is thinner and thinner; the grinding device can grind a plurality of cutters at one time, each cutter can grind to the required thickness or angle step by step through a plurality of working procedures, the progressive grinding mode is higher in grinding precision, a plurality of blades can be ground at one time, and the grinding efficiency is greatly improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a blade sharpening device;

FIG. 2 is an exploded view of the overall structure of the blade sharpening device;

FIG. 3 is a schematic view of a partially enlarged construction of a blade sharpening device;

FIG. 4 is a schematic view of a partially enlarged construction of a blade sharpening device;

fig. 5 is a plan view of the structure when the profiling column contacts the curved surface of the profiling block.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The embodiment provides a blade grinding device, as shown in fig. 1 and 2, mainly comprising a frame 1, a turntable 2, a first driving motor, a feeding assembly 3, a rotary clamping assembly 4, a discharging assembly 5, a blade position correction block 11, 9 clamps 6, 9 telescopic mechanical arm assemblies 7 and 6 grinding wheel assemblies 8, wherein 9 stations which are uniformly distributed on the circumference are arranged on the frame 1 and the turntable 2, and the 9 stations on the frame 1 are positioned on the outer rings of the 9 stations on the turntable 2 and correspond to each other; the turntable 2 is horizontally and rotatably connected to the frame 1 through a rotating shaft 9, the bottom end of the rotating shaft 9 is connected with the output end of the first driving motor, and the top end of the rotating shaft penetrates through the center of the turntable 2 and then extends to the upper part of the turntable;

as shown in fig. 3,9 telescopic mechanical arm assemblies 7 are respectively arranged on 9 stations of the turntable 2, each telescopic mechanical arm assembly 7 mainly comprises a base 701, a sliding block 702, a spring rod 703 and a profiling block 704, 9 bases 701 in the 9 telescopic mechanical arm assemblies 7 are respectively fixed on 9 stations of the turntable 2, the sliding block 702 is slidingly connected to the upper surface of the base 701, a horizontally arranged clamp 6 is fixed at the tail end of the sliding block 702, the initial end of the spring rod 703 is fixed at the free end of the rotating shaft 9, and the tail end is connected with the initial end of the sliding block 702; a profiling block 704 is fixed at the end of the slide block 702 and is located below the clamp 6.

The 6 grinding wheel assemblies 8 are sequentially fixed on 6 stations on the surface of the frame 1 and correspond to the positions of the 6 clamps 6 one by one respectively; as shown in fig. 2, each grinding wheel assembly 8 consists of a base 802, a grinding wheel 801, a profiling column 803 with the same shape as the cutting edge of a blade to be sharpened 10, a fifth driving motor and a cooling water mechanism, wherein the base 802 is fixed on a frame 1, the fifth driving motor is fixed on the base 802, an output shaft of the fifth driving motor is rotationally connected with the center of the grinding wheel 801 and is used for driving the grinding wheel 801 to move circularly, the profiling column 803 is fixed on one side of the base 802, when a clamp 6 is positioned below the grinding wheel 801, the profiling column 803 is in contact with the curved surface of a profiling block 704, and the end part of the profiling column 803, which is in contact with the curved surface of the profiling block 704, is a cambered surface, as shown in fig. 5; the rotation surface of each grinding wheel 801 is perpendicular to and above the plane of each corresponding clamp 6, and the distance between the bottom of each grinding wheel 801 and the edge surface of the blade to be sharpened 10 in each corresponding clamp 6 decreases in sequence from the first station to the last station. The cooling water mechanism is fixed on the base 802, and when the clamp 6 is positioned below the grinding wheel 801, the water outlet of the cooling water mechanism 6 is opposite to the contact point between the cutting edge of the blade 10 to be ground and the grinding wheel 801.

The feeding assembly 3, the discharging assembly 5 and the blade position correction block 11 are respectively arranged on three stations on the frame 1, on which the grinding wheel assembly 8 is not arranged; the rotary clamping assembly 4 is arranged on the frame 1, is positioned at the same station as the feeding assembly 3 and is positioned between the feeding assembly 3 and the clamp 6; a blade position correction block 11 is located between the grinding wheel assembly 8 and the rotating hand grip assembly 4. Wherein,

as shown in fig. 4, the feeding assembly 3 mainly comprises a blade stacking frame 301, a moving plate 302 and a second driving motor, the moving plate 302 is in sliding connection with the frame 1, a conveying groove 303 is formed in the surface of the moving plate 302, the blade stacking frame 301 is vertically fixed on the frame 1 and is located above the conveying groove 303 for a preset distance, and an output shaft of the second driving motor is rotationally connected with the bottom of the moving plate 302 and is used for driving the moving plate 302 to do reciprocating linear motion; the preset distance between the bottom of the conveying groove 303 and the bottom end of the blade stack holder 301 is greater than the thickness of the blade 10 to be sharpened and less than twice the thickness of the blade 10 to be sharpened.

As shown in fig. 4, the rotary gripper assembly 4 mainly comprises a feeding disc 401, a third driving motor and three feeding grippers 402, wherein the circumferences of the three feeding grippers 402 are uniformly distributed at the edge of the feeding disc 401, and an output shaft of the third driving motor is rotationally connected with the bottom of the feeding disc 401 for driving the feeding disc 401 to perform circular motion.

As shown in fig. 4, the blanking assembly 5 mainly comprises a blanking disc 501, a fourth driving motor 502, a blade recovery assembly and three blanking clamps 503, wherein the circumferences of the blanking clamps 503 are uniformly distributed on the edge of the blanking disc 501, and an output shaft of the fourth driving motor 502 is rotationally connected with the bottom of the blanking disc 501 and is used for driving the blanking disc 501 to do circular motion; the blade recovery component is arranged on the frame 1 and is positioned at a station on one side of the blanking disc 501; the blade recovery assembly mainly comprises an air cylinder, a bottom plate 504 and two stacking rods 505, wherein the two stacking rods 505 are parallel to each other and are vertically fixed on the bottom plate 504, the bottom plate 504 is in sliding connection with the frame 1, the air cylinder is fixed on the frame 1, and a telescopic rod of the air cylinder is fixedly connected with one side of the bottom plate 504 and used for driving the bottom plate 504 to do reciprocating linear motion.

The working principle of the blade grinding device in this embodiment is as follows:

firstly, stacking the to-be-sharpened chips 10 on a blade stacking frame 301 in a feeding assembly 3, enabling the to-be-sharpened chips 10 positioned at the lowest position to fall into a conveying groove 303, then starting a second driving motor, driving the to-be-sharpened chips 10 positioned in the conveying groove 303 to move to a station of a rotary clamping assembly 4 by a moving plate 302 under the driving of the second driving motor, starting a third driving motor, driving a feeding disc 401 to rotate by the third driving motor, enabling a feeding clamping hand 402 to rotate to the station of the feeding assembly 3 along with the feeding disc 401, clamping one to-be-sharpened chip 10 in the feeding assembly 3, and then rotating one station, so that the clamped to-be-sharpened chips 10 can be inserted into a clamp 6 at the end part of a telescopic mechanical arm assembly 7 to be clamped and positioned by the clamp 6; then the second driving motor drives the moving plate 302 to move in the opposite direction, the second to-be-sharpened blade 10 falls into the conveying groove 303, meanwhile, the third driving motor also drives the feeding disc 401 to rotate again by an angle, and a feeding clamping hand 402 is positioned at a station of the feeding assembly 3 when the next to-be-sharpened blade 10 to be clamped is conveyed along with the conveying groove 303 of the moving plate and rotates by one station angle; in the same manner as described above, the feeding assembly 3 continuously conveys the blade 10 to be sharpened to the feeding nip 402 on the rotary nip assembly 4, and the rotary nip assembly 4 continuously inserts the blade 10 to be sharpened into the holder 6 at the end of the telescopic mechanical arm assembly 7.

After the clamp 6 clamps the blade 10 to be sharpened, the first driving motor drives the turntable 2 to rotate, and the turntable 2 drives the telescopic mechanical arm assembly 7 to integrally rotate until the blade 10 to be sharpened in the clamp 6 is positioned below the grinding wheel 801 in the first grinding wheel assembly 8, and at the moment, the profiling column 803 is in contact with the curved surface of the profiling block 704, as shown in fig. 5, the included angle between the tangent line of the grinding wheel 801 and the edge opening surface of the blade 10 to be sharpened is 12 degrees. The fifth driving motor drives the grinding wheel 801 to rotate and simultaneously grinds the blade 10 to be grinded, the first driving motor drives the turntable 2 to continue rotating, and as the shape of the profiling block 704 is the same as or matched with the curve of the cutting edge, the profiling column 803 in the grinding wheel assembly 8 extrudes the profiling block 704 in the telescopic mechanical arm assembly 7 when the turntable 2 rotates, so that the spring rod 703 is extruded or rebounded, the sliding block 702 and the profiling block 704 slide along the base 701 in a direction approaching to or far from the center of the turntable 2, and the first grinding of the blade 10 to be sharpened with the curve-shaped cutting edge is realized; as the first driving motor drives the turntable 2 to rotate continuously, the telescopic mechanical arm assembly 7 also rotates continuously along with the turntable 2, the blade ground by the first grinding wheel assembly 8 is rotated to the lower part of the grinding wheel 801 of the second grinding wheel assembly 8, and the second grinding is performed in the same manner as above, because the interval between the grinding wheel 801 in the second grinding wheel assembly 8 and the blade to be sharpened 10 is smaller than the interval between the grinding wheel 801 in the first grinding wheel assembly 8 and the blade to be sharpened 10, the cutting edge of the blade to be sharpened 10 is thinner after the second grinding; and then grinding is finished after the third to sixth grinding.

The telescopic mechanical arm assembly 7 continuously rotates along with the turntable, the clamp 6 conveys the grinded blade to the station of the blanking assembly 5, when the fourth driving motor 502 drives the blanking disc 501 to rotate by one station, one blanking clamp 503 is rotated to be connected with one station on the turntable 2, at the moment, the blanking clamp 503 can clamp the grinded blade in the clamp 6 at the end part of the telescopic mechanical arm assembly 7 on the station, and when the station is rotated again, the blanking clamp 503 can rotationally move the clamped blade to the station of the blade recovery assembly, and the grinded blade is sleeved on the stacking rod 505 on the station, so that the blade is recovered; when one of the stacking bars 505 is full of blades, the cylinder drives the bottom plate 504 to move, and moves the stacking bar 505 full of blades out of the station of the blanking assembly 5, and at the same time, the empty stacking bar 505 is moved to the station of the blanking assembly 5, and then the stacking bar 505 full of blades is manually emptied, and after waiting for the empty stacking bar 505 to be full of blades, the cylinder drives the stacking bar 505 again to the station of the blanking assembly 5.

The foregoing embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, not to limit the scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. The blade grinding device is characterized by comprising a frame (1) and a rotary table (2), wherein the surface of the frame is provided with N stations which are uniformly arranged on the circumference, a first driving motor, a feeding assembly (3), a rotary clamping assembly (4), a discharging assembly (5), N clamps (6), N telescopic mechanical arm assemblies (7) and at most N-2 grinding wheel assemblies (8); n stations on the frame (1) are positioned on N station outer rings on the turntable (2) and correspond to each other one by one; the rotary table (2) is horizontally and rotatably connected to the frame (1) through a rotary shaft (9), the bottom end of the rotary shaft (9) is connected with the output end of the first driving motor, and the top end of the rotary table penetrates through the center of the rotary table (2) and then extends to the upper side of the rotary table; the middle parts of the telescopic mechanical arm assemblies (7) are respectively fixed on N stations on the rotary table (2), the initial ends of the telescopic mechanical arm assemblies are fixed at the free ends of the rotary shafts (9), and the tail ends of the telescopic mechanical arm assemblies are fixed with the clamps (6) which are horizontally arranged; each grinding wheel assembly (8) is sequentially fixed on a station on the surface of the frame (1) and corresponds to the position of each clamp (6) one by one; the feeding assembly (3) and the discharging assembly (5) are respectively arranged on two stations on the frame (1) where the grinding wheel assembly (8) is not arranged; the rotary clamping assembly (4) is arranged on the frame (1), is positioned at the same station as the feeding assembly (3) and is positioned between the feeding assembly (3) and the clamp (6); from the first station to the last station, the distance between the bottom of a grinding wheel (801) in each grinding wheel assembly (8) and the edge opening surface of a blade (10) to be ground in each corresponding fixture (6) is sequentially decreased;

the automatic grinding machine further comprises a blade position correction block (11) fixed on the frame (1), wherein the rotary clamping assembly (4), the blanking assembly (5) and the blade position correction block (11) are respectively arranged on three stations on the frame (1) where the grinding wheel assembly (8) is not arranged, and the blade position correction block (11) is positioned between the grinding wheel assembly (8) and the rotary clamping assembly (4);

the grinding wheel assembly (8) comprises a grinding wheel (801), a base (802) and a fifth driving motor, wherein the base (802) is fixed on the frame (1), the fifth driving motor is fixed on the base (802), and an output shaft of the fifth driving motor is rotationally connected with the center of the grinding wheel (801) and is used for driving the grinding wheel (801) to move circularly; the rotating surface of each grinding wheel (801) is vertical to and above the corresponding plane of each clamp (6);

the grinding wheel assembly (8) further comprises a profiling column (803) with the same shape as the cutting edge of the blade (10) to be sharpened, and the profiling column (803) is fixed on one side of the base (802); the telescopic mechanical arm assembly (7) comprises a base (701), a sliding block (702), a spring rod (703) and a profiling block (704), wherein the base (701) is fixed on the rotary table (2), the sliding block (702) is connected to the upper surface of the base (701) in a sliding mode, the clamp (6) is fixed at the tail end of the sliding block (702), the starting end of the spring rod (703) is fixed at the free end of the rotary shaft (9), the tail end of the spring rod is connected with the starting end of the sliding block (702), and the profiling block (704) is fixed at the tail end of the sliding block (702) and below the clamp (6); the profiling column (803) is in contact with the curved surface of the profiling block (704) when the clamp (6) is located below the grinding wheel (801).

2. The blade grinding device according to claim 1, wherein the feeding assembly (3) comprises a blade stacking frame (301), a moving plate (302) and a second driving motor, the moving plate (302) is slidably connected with the frame (1), a conveying groove (303) is formed in the surface of the moving plate, the blade stacking frame (301) is vertically fixed on the frame (1) and located above the conveying groove (303) by a preset distance, and an output shaft of the second driving motor is rotatably connected with the bottom of the moving plate (302) and used for driving the moving plate (302) to do reciprocating linear motion.

3. The blade sharpening device as recited in claim 2, wherein a preset distance between a bottom of the conveying recess (303) and a bottom end of the blade stack holder (301) is greater than a thickness of the blade (10) to be sharpened and less than twice the thickness of the blade (10) to be sharpened.

4. The blade grinding device according to claim 1, wherein the rotary clamping assembly (4) comprises a feeding disc (401), a third driving motor and at least one feeding clamping hand (402), the circumference of each feeding clamping hand (402) is uniformly distributed on the edge of the feeding disc (401), and an output shaft of the third driving motor is rotationally connected with the bottom of the feeding disc (401) and is used for driving the feeding disc (401) to do circular motion.

5. The blade grinding device according to claim 1, wherein the blanking component (5) comprises a blanking disc (501), a fourth driving motor (502), a blade recovery component and at least one blanking clamp (503), the circumferences of the blanking clamps (503) are uniformly distributed on the edge of the blanking disc (501), and an output shaft of the fourth driving motor (502) is rotationally connected with the bottom of the blanking disc (501) and is used for driving the blanking disc (501) to do circular motion; the blade recovery assembly is arranged on the frame (1) and located at a station on one side of the blanking disc (501).

6. The blade sharpening device as recited in claim 5, wherein the blade recovery assembly includes a cylinder, a base plate (504) and two stacking rods (505), the two stacking rods (505) are parallel to each other and are vertically fixed on the base plate (504), the base plate (504) is slidably connected with the frame (1), the cylinder is fixed on the frame (1), and a telescopic rod of the cylinder is fixedly connected with one side of the base plate (504) for driving the base plate (504) to reciprocate linearly.

7. Blade sharpening device as in claim 1, characterized in that said grinding wheel assembly (8) further comprises cooling water means fixed to said base (802), the outlet of which is directly opposite to the contact point of the edge of the blade (10) to be sharpened with said grinding wheel (801) when said clamp (6) is positioned under said grinding wheel (801).