Cutting edge grinding device and grinding method

Abstract

The invention belongs to the technical field of cutting edge grinding, and particularly relates to a cutting edge grinding device and a grinding method.The cutting edge grinding device comprises a knife grinding assembly, and the knife grinding assembly is used for grinding a clam-shaped blade composed of a pair of first blade faces, a pair of second blade faces and a pair of third blade faces on the blade portion of a knife body. The two sharpening strips in the sharpening unit can be telescopically adjusted in the inclination direction of the sharpening strips, so that it is guaranteed that the sharpening parts of the sharpening strips can be replaced after being used for a period of time instead of replacing the whole sharpening strips; the grinding part on the knife sharpening strip can be replaced in the grinding process without overall shutdown of equipment, so that the utilization rate of the grinding surface on the knife sharpening strip and the production efficiency of the knife are effectively improved, the overall replacement period of the knife sharpening strip is effectively shortened, and the overall use efficiency of the knife sharpening strip is improved; and therefore, the replacement cost of the sharpening strip is effectively reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of blade grinding, and in particular relates to a blade grinding device and a grinding method. Background Art

[0002] Knives are one of the most commonly used kitchen utensils in every household. The blade of a traditional knife is Figure 10 The V-shaped blade shown in (a) has a sharp cutting edge and excellent cutting performance. Sharpening a V-shaped blade is also easy. Wet sharpening with a grinding wheel can better maintain the inherent heat treatment properties of the tool material. However, the V-shaped blade has poor edge retention and is prone to chipping when cutting hard objects. Most existing cutting tools have V-shaped edges.

[0003] A clam blade is another type of knife edge. Its profile curves outward, resembling a clam, hence its name. During cutting and chopping, the contact surface between the blade and the object is smaller than with other V-shaped blades. This reduces resistance during cutting, resulting in better edge retention and cutting performance, less effort, and improved edge durability and resharpenability.

[0004] like Figure 10 As described above, the sharpening of a clam-edge blade requires symmetrically grinding three pairs of blade surfaces on the blade of the tool from different angles multiple times to form the blade edge, which requires certain grinding experience, high technical requirements and low efficiency.

[0005] Patent application number 201921350015.5 discloses an automatic sharpening device, which is only suitable for sharpening V-shaped blades with a pair of blade surfaces and is not suitable for sharpening clam blades with three pairs of blade surfaces. The freedom of the grinding wheel must be increased so that it can swing to a certain extent and have the function of grinding blade surfaces at different angles. However, this operation has low sharpening efficiency because it cannot grind the three pairs of blade surfaces of the clam blade at the same time. It is necessary to specially design an automated equipment that can grind the three blade surfaces of the clam blade at the same time.

[0006] Furthermore, grinding wheels or strips need to be replaced after a period of use due to wear. Since only a fixed portion of the wheel or strip is worn due to grinding, the grinding surface utilization rate of the wheel or strip is low, resulting in a short replacement cycle and low wheel or strip utilization efficiency, which in turn leads to high replacement costs. Furthermore, replacing the wheel or strip requires equipment downtime for manual replacement, which affects production efficiency.

[0007] The present invention designs a blade grinding device and a grinding method to solve the above problems. Summary of the Invention

[0008] Based on this, it is necessary to provide a blade grinding device and a grinding method to address the problems existing in the current blade grinding equipment. In the present invention, the sharpening assembly that reciprocates under the drive of the third driving assembly is composed of two sharpening units, and each sharpening unit is composed of three grinding units that can respectively grind and shape the three blade surfaces of the blade body, and each grinding unit contains two sharpening bars that are cross-distributed with each other and perform a pair of V-shaped blade surface grinding on the blade body. The crossing angles and crossing point heights of the sharpening bars of the three grinding units in each sharpening unit are different, thereby ensuring that the sharpening assembly, driven by the third driving assembly, automatically sharpens the clam blade with three pairs of V-shaped blade surfaces of the blade pressed down and fixed by the clamping assembly at the end of the robotic arm at one time, without the need to process the three pairs of blade surfaces in sequence to form the clam blade and without the operator having experience in clam blade grinding. The technical requirements for clam blade sharpening are not high, thereby effectively improving the efficiency and quality of clam blade sharpening. The intersection angle of the two sharpening strips in any of the sharpening units of the present invention is adjustable. A larger intersection angle results in a thicker, more robust clam-blade edge, making it more effective for chopping hard objects. A smaller intersection angle results in a thinner, more delicate clam-blade edge, making it more effective for finely cutting thin, soft ingredients, effectively increasing the variety of uses for the tool. The present invention offers the advantage of a high degree of automation for sharpening the blade's cutting edge. The two sharpening strips in the sharpening unit of the present invention can be adjusted telescopically along their inclination, ensuring that the sharpening portion of the sharpening strip can be replaced after a period of use, rather than replacing the entire sharpening strip. Furthermore, the replacement of the sharpening portion of the sharpening strip does not require the entire equipment to be shut down; rather, the sharpening portion can be replaced during the sharpening process. This effectively increases the utilization rate of the sharpening strip's grinding surface and the production efficiency of the tool, shortening the sharpening strip's overall replacement cycle and improving its overall efficiency, thereby effectively reducing the cost of sharpening strip replacement.

[0009] The above purpose is achieved through the following technical solutions: A blade sharpening device for sharpening the clam edge of a blade, comprising: A sharpening assembly on a working platform that reciprocates in a straight line under the drive of a third driving assembly is used to sharpen the blade of a blade into a clam edge consisting of a pair of first blade surfaces, a pair of second blade surfaces and a pair of third blade surfaces. The sharpening assembly includes two sharpening units distributed along its movement direction. The sharpening unit includes a second seat body that slides on the working platform. The second seat body is provided with three grinding units distributed along its movement direction and used for processing a pair of first blade surfaces, a pair of second blade surfaces and a pair of third blade surfaces respectively. The grinding unit includes a pair of sharpening bars distributed along its movement direction and in a cross state. The second seat body is provided with a second driving assembly for driving the sharpening bars to swing and a first driving assembly for driving the sharpening bars to extend and retract along its tilting direction.

[0010] In one embodiment, the working platform is suspended by supporting legs, and a first slot for placing a blade to be sharpened and a second slot for placing a blade that has been sharpened.

[0011] In one embodiment, the clamping assembly includes a telescopic rod arranged at the end of the robotic arm, a pressure spring is arranged in the telescopic rod to drive the extension of the telescopic rod, a first seat is arranged at the end of the telescopic rod, a first slider is slidably arranged in a second slide groove on the lower surface of the first seat, the first slider is threadedly connected to a first screw rod rotatably arranged on the first seat body, the first screw is transmission-connected to a first motor arranged on the first seat body, the lower end of the first slider is provided with a first clamping block that cooperates with one side of the blade body, and the lower end of the first seat is provided with a second clamping block that cooperates with the other side of the blade body.

[0012] In one embodiment, the telescopic rod is composed of an inner rod and a rod sleeve that are sleeved together, the pressure spring is arranged in the rod sleeve, and the two ends of the pressure spring are respectively connected to the inner wall of the rod sleeve and the inner rod.

[0013] In one embodiment, the third drive assembly includes a slide seat arranged at the lower ends of the two second seat bodies and a third motor arranged on the working platform, the slide seat is slidably arranged in the first slide groove on the working platform, the output shaft of the third motor is rotatably arranged in the circular hole on the working platform, a crank wheel is provided on the output shaft of the third motor, and the crank wheel is located below the working platform, and a connecting rod is hinged between the crank wheel and the slide seat.

[0014] In one embodiment, a third slider is provided at the lower end of each of the two sharpening strips in the grinding unit, and the two third sliders slide in the two second guide seats along the inclination direction of the corresponding sharpening strip respectively. A second round pin parallel to the movement direction of the second seat body is provided at the lower end of the second guide seat, and the second round pin is rotatably set in the circular hole on the first support, and the first support is fixed on the second seat body.

[0015] In one embodiment, the first driving assembly includes two first guide seats arranged on the second seat body and a first rotating shaft arranged in the second seat body, two second sliders are arranged in the two first guide seats for synchronous sliding in the vertical direction, the second sliders are threadedly connected to the second screws rotatably arranged on the corresponding first guide seats, the lower ends of the two second screws are provided with a first gear, the two first gears are respectively meshed with the two second gears at both ends of the first rotating shaft, a third gear is provided on one second screw, the third gear is meshed with the fourth gear on the output shaft of the second motor outside the second seat body, the output shaft of the second motor is rotatably set in the circular hole on the second seat body, the two second sliders are integrally connected by a cross bar, and there are two sliding sleeves corresponding to the third slider on the cross bar that slide synchronously toward or away from each other, the sliding sleeve is provided with a first round pin, and the first round pin is rotatably set in the circular hole on the corresponding third slider.

[0016] In one embodiment, the second drive assembly includes two arc worm gears, which are respectively arranged at the lower ends of the two second guide seats in the corresponding grinding units, and the arc worm gears are engaged with a worm rotatably arranged on the corresponding first support. The lower end of the worm is provided with a fifth gear, and the fifth gear is engaged with the sixth gear. The sixth gear is provided on the second rotating shaft, and the second rotating shaft is rotatably arranged in a circular hole on the second support. The second support is fixed on the second seat body, and two seventh gears that are meshed with each other are provided on the two second rotating shafts. A third rotating shaft is rotatably arranged in a circular hole on the first support, and a ninth gear and a torsion wheel are provided at both ends of the third rotating shaft, and the ninth gear is engaged with the eighth gear on the corresponding worm.

[0017] In one embodiment, anti-slip grooves are provided on the rim of the twist wheel.

[0018] A grinding method for a blade grinding device is as follows: S1. According to the thickness of the clam-blade to be processed, the twist wheel of the second drive assembly in the grinding unit is rotated to adjust the cross angle between the corresponding two grinding strips. The cooperation of the arc worm wheel and the worm locks the inclination angle of the grinding strips.

[0019] S2. After the cross angle of the two sharpening bars of the sharpening unit in the sharpening assembly is adjusted, the third motor in the third driving assembly is started to drive the sharpening assembly to reciprocate, and the reciprocating amplitude of the sharpening assembly is greater than the length of the sharpening unit or half the length of the blade.

[0020] S3. The blade to be processed in the first slot on the working platform is clamped to the top of the sharpening assembly by a clamping assembly arranged at the end of the robotic arm, and the cutting edge of the blade is pressed down between the two sharpening bars of the grinding unit in the sharpening assembly. When the blade is pressed down, the three grinding units in the reciprocating sharpening unit grind the cutting edge of the blade to form a clam blade consisting of a pair of first edge surfaces, a pair of second edge surfaces and a pair of third edge surfaces.

[0021] S4. After the blade of the blade body is sharpened, the sharpened blade body is moved to the second slot on the work platform for storage by the clamping component at the end of the robotic arm.

[0022] S5. When the two sharpening bars in the grinding unit are worn out after being used for a period of time, the second motor in the first driving assembly is started to drive the two sharpening bars in the grinding unit to slide synchronously along their own inclination direction by a certain amplitude, so that the grinding parts of the sharpening bars are automatically replaced without stopping the machine.

[0023] The beneficial effects of the present invention are: 1. In the present invention, the knife sharpening assembly that reciprocates under the drive of the third driving assembly is composed of two knife sharpening units, and each knife sharpening unit is composed of three grinding units that can respectively grind and shape the three blade surfaces of the blade, and each grinding unit contains two knife sharpening bars that are cross-distributed and perform a pair of V-shaped blade surface grinding on the blade. The crossing angles and crossing point heights of the knife sharpening bars of the three grinding units in each knife sharpening unit are different, thereby ensuring that the knife sharpening assembly can automatically sharpen the knife body with three pairs of V-shaped blade surfaces at one time under the drive of the third driving assembly, without the need to sequentially process the three pairs of blade surfaces to form the clam blade and without the need for the operator to have experience in clam blade sharpening. The technical requirements for clam blade sharpening are not high, thereby effectively improving the efficiency and quality of clam blade sharpening.

[0024] 2. The crossing angle of the two sharpening strips of any grinding unit in the sharpening unit of the present invention can be adjusted. The larger the crossing angle of the sharpening strips, the thicker the clam-blade edge formed by grinding is, which is conducive to chopping objects with greater hardness. The smaller the crossing angle of the sharpening strips, the thinner the clam-blade edge formed by grinding is, which is conducive to fine cutting of thin and soft food materials, effectively increasing the use types of the processed knives.

[0025] 3. The present invention has the advantage of high automation in sharpening the blade of the blade.

[0026] 4. The two sharpening strips in the grinding unit of the present invention can be telescopically adjusted along their inclination direction, thereby ensuring that the grinding part of the sharpening strip can be replaced after a period of use instead of replacing the sharpening strip as a whole. Moreover, the replacement of the grinding part on the sharpening strip does not require the entire equipment to be shut down. Instead, the replacement of the grinding part on the sharpening strip can be completed during the grinding process, which effectively improves the utilization rate of the grinding surface on the sharpening strip and the production efficiency of the tool, effectively shortens the overall replacement cycle of the sharpening strip and improves the overall use efficiency of the sharpening strip, thereby effectively reducing the replacement cost of the sharpening strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 This is a cross-sectional view of the connection between the drive assembly and the sharpening assembly in the present invention; Figure 3 is a cross-sectional view of the gripping assembly; Figure 4 This is a cross-sectional view of the sharpening assembly grinding and sharpening the blade; Figure 5 is a schematic diagram of a knife sharpening unit in a knife sharpening assembly of the present invention; Figure 6 is a first cross-sectional view of the grinding unit on the sharpening unit; Figure 7 is a second cross-sectional view of the grinding unit on the sharpening unit; Figure 8 is a third cross-sectional view of the grinding unit on the sharpening unit; Figure 9 is a fourth cross-sectional view of the upper grinding unit of the sharpening unit; Figure 10 This is a schematic diagram of the three states of clam blade sharpening; Figure 11 It is a schematic diagram of the three grinding units on the sharpening unit sharpening the blade; Figure 12 This is a schematic diagram of the blade entering the three grinding units on the sharpening unit for sharpening; Name of the label in the figure: 101. Support leg; 102. Working platform; 103. First chute; 104. First slot; 105. Second slot; 106. Robotic arm; 107. Blade; 108. First cutting edge; 109. Second cutting edge; 110. Third cutting edge; 200, gripping assembly; 201, first base; 202, second slide; 203, first slider; 204, first screw; 205, first motor; 206, first clamping block; 207, second clamping block; 208, telescopic rod; 209, inner rod; 210, rod sleeve; 211, pressure spring; 300, sharpening assembly; 302, sharpening unit; 303, second base; 304, grinding unit; 305, first guide seat; 306, second slider; 307, crossbar; 308, sleeve; 309, first round pin; 310, third slider; 311, sharpening bar; 312, second guide seat; 313, second round pin; 314, first support; 315, first drive assembly; 316, second screw; 317, first gear; 318, second gear; 319, first rotating shaft; 320, third gear; 321, fourth gear; 322, second motor; 323, second drive assembly; 324, circular arc worm gear; 325, worm; 326, fifth gear; 327, sixth gear; 328, second rotating shaft; 329, seventh gear; 330, eighth gear; 331, ninth gear; 332, third rotating shaft; 333, torsion wheel; 334, second support; 400, third drive assembly; 401, third motor; 402, crank pulley; 403, connecting rod; 404, slide. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like, indicating positions or relationships, are based on those shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or element referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention.

[0030] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0031] like Figure 1-12 As shown, a blade sharpening device for sharpening the clam edge of a blade 107 includes: Driven by the third drive assembly 400, the sharpening assembly 300 reciprocates in a straight line on the working platform 102, and is used to sharpen the blade portion of the blade body 107 into a clam edge consisting of a pair of first blade surfaces 108, a pair of second blade surfaces 109 and a pair of third blade surfaces 110. The sharpening assembly 300 includes two sharpening units 302 distributed along its movement direction, and the sharpening unit 302 includes a second seat body 303 sliding on the working platform 102, and the second seat body 303 is provided with three grinding units 304 distributed along its movement direction and used for processing a pair of first blade surfaces 108, a pair of second blade surfaces 109 and a pair of third blade surfaces 110 respectively. The grinding unit 304 includes a pair of sharpening bars 311 distributed along its movement direction and in a cross state, and the second seat body 303 is provided with a second drive assembly 323 for driving the sharpening bar 311 to swing and a first drive assembly 315 for driving the sharpening bar 311 to extend and retract along its tilt direction.

[0032] In a further embodiment, Figure 1 As shown, the working platform 102 is suspended by the legs 101 , and the working platform 102 is provided with a first slot 104 for placing a blade 107 to be sharpened and a second slot 105 for placing a blade 107 that has been sharpened.

[0033] In a further embodiment, Figure 1 、 Figure 2 、 Figure 3As shown, the clamping assembly 200 includes a telescopic rod 208 arranged at the end of the robotic arm 106, and a pressure spring 211 is arranged in the telescopic rod 208 to drive the extension thereof. The end of the telescopic rod 208 is provided with a first base body 201, and a first slider 203 is slidably arranged in the second slide groove 202 on the lower surface of the first base body 201. The first slider 203 is threadedly connected to the first screw 204 rotatably arranged on the first base body 201, and the first screw 204 is transmission-connected to the first motor 205 arranged on the first base body 201. The lower end of the first slider 203 is provided with a first clamping block 206 that cooperates with one side of the blade body 107, and the lower end of the first base body 201 is provided with a second clamping block 207 that cooperates with the other side of the blade body 107.

[0034] In a further embodiment, Figure 3 As shown, the telescopic rod 208 is composed of an inner rod 209 and a rod sleeve 210 that are connected to each other, and the pressure spring 211 is arranged in the rod sleeve 210. The two ends of the pressure spring 211 are respectively connected to the inner wall of the rod sleeve 210 and the inner rod 209.

[0035] In a further embodiment, Figure 2 As shown, the third drive assembly 400 includes a slide 404 arranged at the lower ends of the two second seat bodies 303 and a third motor 401 arranged on the working platform 102, the slide 404 is slidably arranged in the first slide groove 103 on the working platform 102, the output shaft of the third motor 401 is rotatably arranged in the circular hole on the working platform 102, a crank wheel 402 is provided on the output shaft of the third motor 401, and the crank wheel 402 is located below the working platform 102, and a connecting rod 403 is hinged between the crank wheel 402 and the slide 404.

[0036] In a further embodiment, Figure 6 、 Figure 7 、 Figure 9 As shown, the lower ends of the two sharpening strips 311 in the grinding unit 304 are each provided with a third slider 310, and the two third sliders 310 slide in the two second guide seats 312 along the inclination direction of the corresponding sharpening strip 311 respectively, and the lower end of the second guide seat 312 is provided with a second round pin 313 parallel to the movement direction of the second seat body 303, and the second round pin 313 is rotatably set in the circular hole on the first support 314, and the first support 314 is fixed on the second seat body 303.

[0037] In a further embodiment, Figure 6 、 Figure 7As shown, the first driving assembly 315 includes two first guide seats 305 provided on the second seat body 303 and a first rotating shaft 319 provided in the second seat body 303. Two second sliders 306 are provided in the two first guide seats 305 for synchronous sliding along the vertical direction. The second sliders 306 are threadedly connected with the second screw rods 316 rotatably provided on the corresponding first guide seats 305. The lower ends of the two second screw rods 316 are provided with first gears 317. The two first gears 317 are respectively engaged with the two second gears 318 at the two ends of the first rotating shaft 319. A second screw rod 318 is provided at the lower ends of the two second screw rods 316. 16 is provided with a third gear 320, and the third gear 320 is engaged with the fourth gear 321 on the output shaft of the second motor 322 outside the second base body 303, and the output shaft of the second motor 322 is rotatably set in the circular hole on the second base body 303, and the two second sliders 306 are integrally connected by a cross bar 307, and the cross bar 307 has two sliding sleeves 308 corresponding to the third sliders 310 and sliding in synchronization with each other or in synchronization with each other, and the sliding sleeve 308 is provided with a first round pin 309, and the first round pin 309 is rotatably set in the circular hole on the corresponding third slider 310.

[0038] In a further embodiment, Figure 8 、 Figure 6 、 Figure 7 、 Figure 9 As shown, the second driving assembly 323 includes two circular arc worm gears 324, which are respectively arranged at the lower ends of the two second guide seats 312 in the corresponding grinding unit 304, and the circular arc worm gears 324 are engaged with a worm 325 rotatably arranged on the corresponding first support 314. The lower end of the worm 325 is provided with a fifth gear 326, and the fifth gear 326 is engaged with a sixth gear 327. The sixth gear 327 is provided on the second rotating shaft 328. The second rotating shaft 328 is rotatably set in the circular hole on the second support 334, and the second support 334 is fixed on the second base body 303. Two seventh gears 329 that mesh with each other are set on the two second rotating shafts 328. A third rotating shaft 332 is rotatably set in the circular hole on the first support 314. The ninth gear 331 and the twist wheel 333 are set at both ends of the third rotating shaft 332. The ninth gear 331 meshes with the eighth gear 330 on the corresponding worm 325.

[0039] In a further embodiment, Figure 9 As shown, the rim of the twist wheel 333 is provided with anti-slip grooves.

[0040] A grinding method for a blade grinding device is as follows: S1. According to the thickness of the clam-edge to be processed, the twist wheel 333 of the second drive assembly 323 in the grinding unit 304 is rotated to adjust the intersection angle between the corresponding two sharpening strips 311. The cooperation between the arc worm wheel 324 and the worm 325 locks the inclination angle of the sharpening strips 311.

[0041] S2. After the cross angle adjustment of the two sharpening bars 311 of the grinding unit 304 in the sharpening assembly 300 is completed, the third motor 401 in the third driving assembly 400 is started to drive the sharpening assembly 300 to reciprocate. The reciprocating amplitude of the sharpening assembly 300 is greater than the length of the sharpening unit 302 or half the length of the blade 107.

[0042] S3. The clamping assembly 200 arranged at the end of the robotic arm 106 clamps the blade body 107 to be processed in the first slot 104 on the work platform 102 to the top of the sharpening assembly 300, and presses the cutting edge of the blade body 107 down between the two sharpening bars 311 of the grinding unit 304 in the sharpening assembly 300. When the blade body 107 is pressed down, the three grinding units 304 in the reciprocating sharpening unit 302 grind the cutting edge of the blade body 107 to form a clam blade consisting of a pair of first blade surfaces 108, a pair of second blade surfaces 109 and a pair of third blade surfaces 110.

[0043] S4. After the blade of the blade body 107 is sharpened, the sharpened blade body 107 is moved to the second slot 105 on the work platform 102 for storage by the clamping assembly 200 at the end of the robotic arm 106.

[0044] S5. When the two sharpening bars 311 in the grinding unit 304 are worn out after being used for a period of time, the second motor 322 in the first driving assembly 315 is started to drive the two sharpening bars 311 in the grinding unit 304 to slide synchronously along their own tilting direction by a certain amplitude, so that the grinding parts of the sharpening bars 311 are automatically replaced without stopping the machine.

[0045] The present invention provides a knife sharpening assembly 300 that reciprocates under the drive of the third drive assembly 400 and is composed of two knife sharpening units 302. Each knife sharpening unit 302 is composed of three knife sharpening units 304 that can respectively grind and shape three blade surfaces of the blade body 107. Each knife sharpening unit 304 includes two knife sharpening bars 311 that are cross-distributed and perform a pair of V-shaped blade surface grinding on the blade body 107. The cross-angles and cross-point heights of the knife sharpening bars 311 of the three knife sharpening units 304 in each knife sharpening unit 302 are different. This ensures that the knife sharpening assembly 300 automatically sharpens the knife body 107 with three pairs of V-shaped blade surfaces at one time under the drive of the third drive assembly 400. There is no need to process the three pairs of blade surfaces in sequence to form the clam blade and the operator does not need to have experience in clam blade sharpening. The technical requirements for clam blade sharpening are not high, thereby effectively improving the efficiency and quality of clam blade sharpening. The intersecting angle of the two sharpening strips 311 of any one of the grinding units 304 in the sharpening unit 302 of the present invention can be adjusted. A larger intersecting angle of the sharpening strips 311 results in a thicker, clam-blade edge, which is advantageous for chopping hard objects. A smaller intersecting angle of the sharpening strips 311 results in a thinner, clam-blade edge, which is advantageous for finely cutting thin and soft food, effectively increasing the number of uses of the processed knife. The present invention has the advantage of a high degree of automation in sharpening the blade portion of the blade body 107. The two sharpening bars 311 in the grinding unit 304 of the present invention can be telescopically adjusted along their inclination direction, thereby ensuring that the grinding part of the sharpening bar 311 can be replaced after a period of use instead of replacing the sharpening bar 311 as a whole, and the replacement of the grinding part on the sharpening bar 311 does not require the entire equipment to be shut down. Instead, the replacement of the grinding part on the sharpening bar 311 can be completed during the grinding process, which effectively improves the utilization rate of the grinding surface on the sharpening bar 311 and the production efficiency of the tool, effectively shortens the overall replacement cycle of the sharpening bar 311 and improves the overall use efficiency of the sharpening bar 311, thereby effectively reducing the replacement cost of the sharpening bar 311.

[0046] The operation process of the present invention is as follows: According to the thickness of the clam-edge edge to be processed on the blade body 107 , the twist wheel 333 of the second driving assembly 323 in the grinding unit 304 is rotated to adjust the cross angle between the corresponding two sharpening bars 311 .

[0047] The adjustment process of the two sharpening strips 311 in the grinding unit 304 is as follows: the twist wheel 333 is rotated, and the twist wheel 333 drives the corresponding sharpening strip 311 to swing a certain angle through the third rotating shaft 332, the ninth gear 331, the eighth gear 330, the worm 325, the arc worm wheel 324, the second guide seat 312 and the third slider 310. The worm 325 drives the other sharpening strip 311 to swing toward each other by the same angle through the corresponding fifth gear 326, the sixth gear 327, the second rotating shaft 328, two seventh gears 329, another second rotating shaft 328, the sixth gear 327, the fifth gear 326, another worm 325, another arc worm wheel 324, another second guide seat 312 and the third slider 310, thereby completing the adjustment of the crossing angle of the two sharpening strips 311 in the grinding unit 304. The cooperation between the arc worm wheel 324 and the worm 325 locks the inclination angle of the sharpening strips 311.

[0048] After the cross angle adjustment of the two sharpening bars 311 of each sharpening unit 304 in the sharpening assembly 300 is completed, the third motor 401 in the third driving assembly 400 is started to drive the sharpening assembly 300 to reciprocate, and the reciprocating amplitude of the sharpening assembly 300 is greater than the length of the sharpening unit 302 or half the length of the blade 107.

[0049] Next, the blade body 107 to be processed in the first slot 104 on the work platform 102 is clamped to the top of the sharpening assembly 300 by the clamping assembly 200 arranged at the end of the robotic arm 106, and the cutting edge of the blade body 107 is pressed down between the two sharpening bars 311 of the grinding unit 304 in the sharpening assembly 300. When the blade body 107 is pressed down, the three grinding units 304 in the reciprocating sharpening unit 302 grind the cutting edge of the blade body 107 to form a clam blade consisting of a pair of first blade surfaces 108, a pair of second blade surfaces 109 and a pair of third blade surfaces 110.

[0050] The process of the clamping assembly 200 clamping the blade 107 is as follows: The first motor 205 in the clamping assembly 200 is started. The first motor 205 drives the first clamping block 206 through the first screw 204 and the first slider 203 to press the blade 107 against the second clamping block 207, so that the first clamping block 206 and the second clamping block 207 together effectively clamp the blade 107. Then, the clamping assembly 200 holding the blade 107 is driven by the robotic arm 106 to move to the top of the sharpening assembly 300 and press the blade 107 downward. After the cutting edge of the blade 107 is against the sharpening bar 311 of the sharpening assembly 300, the outer sleeve of the telescopic rod 208 moves downward relative to the inner rod 209 under the low pressure of the robotic arm 106 and further compresses the pressure spring 211. The further compressed pressure spring 211 causes the blade 107 to continue to move downward during the sharpening process and eventually form a clam edge.

[0051] After the blade of the blade body 107 is sharpened, the sharpened blade body 107 is moved to the second slot 105 on the work platform 102 for storage by the clamping assembly 200 at the end of the robotic arm 106 .

[0052] When the two sharpening bars 311 in the grinding unit 304 become worn after being used for a period of time, the second motor 322 in the first drive assembly 315 is activated to drive the two sharpening bars 311 in the grinding unit 304 to slide synchronously along their own inclination direction by a certain range, so that the grinding parts of the sharpening bars 311 are automatically replaced without stopping the machine. The process of replacing the grinding parts of the sharpening bars 311 is as follows: The second motor 322 in the first drive assembly 315 is started, and the second motor 322 drives the second screw 316 on the corresponding side to rotate through the fourth gear 321 and the third gear 320. The second screw 316 drives the second screw 316 on the other side to rotate through the corresponding first gear 317, the second gear 318, the first rotating shaft 319, the second gear 318 on the other side, and the first gear 317. The two second screws 316 drive the two second sliders 306 to move upward synchronously. Driven by the two second sliders 306, the cross bar 307 drives the two third sliders 310 to slide obliquely upward along the corresponding second guide seat 312 through the two sliding sleeves 308. The two third sliders 310 simultaneously drive the two sharpening strips 311 to slide obliquely upward synchronously by the same amplitude and complete the replacement of the grinding part on the sharpening strip 311. During the tilting movement of the sharpening strip 311, the sliding sleeve 308 slides a corresponding distance on the cross bar 307.

Claims

1. A blade sharpening device for sharpening the blade of a blade, characterized in that: include: A sharpening assembly on a working platform that reciprocates in a straight line under the drive of a third driving assembly is used to sharpen the blade of a blade into a clam edge consisting of a pair of first blade surfaces, a pair of second blade surfaces and a pair of third blade surfaces. The sharpening assembly includes two sharpening units distributed along its movement direction. The sharpening unit includes a second seat body that slides on the working platform. The second seat body is provided with three grinding units distributed along its movement direction and used for processing a pair of first blade surfaces, a pair of second blade surfaces and a pair of third blade surfaces respectively. The grinding unit includes a pair of sharpening bars distributed along its movement direction and in a cross state. The second seat body is provided with a second driving assembly for driving the sharpening bars to swing and a first driving assembly for driving the sharpening bars to extend and retract along its tilting direction.

2. A blade sharpening device according to claim 1, characterized in that: The working platform is suspended in the air by supporting legs, and is provided with a first slot for placing a blade to be sharpened and a second slot for placing a blade that has been sharpened.

3. A blade sharpening device according to claim 1, characterized in that: The clamping assembly includes a telescopic rod arranged at the end of the robotic arm, a pressure spring driving the telescopic rod to extend is arranged in the telescopic rod, a first seat body is provided at the end of the telescopic rod, a first slider is slidably arranged in a second slide groove on the lower surface of the first seat body, the first slider is threadedly connected to a first screw rotatably arranged on the first seat body, the first screw is transmission-connected to a first motor arranged on the first seat body, the lower end of the first slider is provided with a first clamping block cooperating with one side of the blade body, and the lower end of the first seat body is provided with a second clamping block cooperating with the other side of the blade body.

4. A blade sharpening device according to claim 3, characterized in that: The telescopic rod is composed of an inner rod and a rod sleeve which are sleeved together. The pressure spring is arranged in the rod sleeve. The two ends of the pressure spring are respectively connected to the inner wall of the rod sleeve and the inner rod.

5. A blade sharpening device according to claim 1, characterized in that: The third driving assembly includes a slide seat arranged at the lower ends of the two second seat bodies and a third motor arranged on the working platform. The slide seat is slidably arranged in the first slide groove on the working platform. The output shaft of the third motor is rotatably arranged in the circular hole on the working platform. A crank wheel is provided on the output shaft of the third motor, and the crank wheel is located below the working platform. A connecting rod is hinged between the crank wheel and the slide seat.

6. A blade sharpening device according to claim 1, characterized in that: A third slider is provided at the lower end of each of the two sharpening strips in the grinding unit. The two third sliders slide in the two second guide seats along the inclination direction of the corresponding sharpening strip respectively. A second round pin parallel to the movement direction of the second seat body is provided at the lower end of the second guide seat. The second round pin is rotatably set in the circular hole on the first support, and the first support is fixed on the second seat body.

7. A blade sharpening device according to claim 6, characterized in that: The drive gear of claim 1, wherein the first gear is mounted on the second end of the drive gear and the second gear is mounted on the second end of the drive gear. The drive gear is mounted on a link cam of the second cam and the link is mounted on a link cam of the second cam. The drive gear is mounted on a link cam of the second cam. The drive gear is mounted on a link cam of the second cam.

8. A blade sharpening device according to claim 6, characterized in that: The second driving assembly includes two arc worm gears, which are respectively arranged at the lower ends of the two second guide seats in the corresponding grinding units, and the arc worm gears are engaged with a worm rotatably arranged on the corresponding first support. The lower end of the worm is provided with a fifth gear, and the fifth gear is engaged with the sixth gear. The sixth gear is provided on the second rotating shaft, and the second rotating shaft is rotatably arranged in a circular hole on the second support. The second support is fixed on the second seat body, and two seventh gears that are meshed with each other are provided on the two second rotating shafts. A third rotating shaft is rotatably arranged in a circular hole on the first support, and a ninth gear and a torsion wheel are provided at both ends of the third rotating shaft, and the ninth gear is engaged with the eighth gear on the corresponding worm.

9. A blade sharpening device according to claim 8, characterized in that: Anti-skid grooves are provided on the rim of the twist wheel.

10. The method for sharpening a blade according to claim 1, wherein: The grinding method is: S1. According to the thickness of the clam-blade to be processed, the twist wheel of the second drive assembly in the grinding unit is rotated to adjust the intersection angle between the corresponding two sharpening strips. The cooperation between the arc worm wheel and the worm gear locks the inclination angle of the sharpening strips; S2, after the cross angle of the two sharpening strips of the sharpening unit in the sharpening assembly is adjusted, the third motor in the third driving assembly is started to drive the sharpening assembly to reciprocate, and the reciprocating amplitude of the sharpening assembly is greater than the length of the sharpening unit or half the length of the blade; S3, clamping the blade to be processed in the first slot on the work platform to the top of the sharpening assembly by a clamping assembly provided at the end of the robotic arm, and pressing the cutting edge of the blade down between two sharpening bars of the grinding unit in the sharpening assembly, while the blade is being pressed down, the three grinding units in the reciprocating sharpening unit grind the cutting edge of the blade into a clam edge consisting of a pair of first edge faces, a pair of second edge faces, and a pair of third edge faces; S4, after the blade portion of the blade body is sharpened, the sharpened blade body is moved to the second slot on the work platform for storage by the clamping assembly at the end of the robotic arm; S5. When the two sharpening bars in the grinding unit are worn out after being used for a period of time, the second motor in the first driving assembly is started to drive the two sharpening bars in the grinding unit to slide synchronously along their own inclination direction by a certain amplitude, so that the grinding parts of the sharpening bars are automatically replaced without stopping the machine.

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