A blade sharpening device and method

Abstract

The present application belongs to the technical field of knife edge polishing, and particularly relates to a knife edge polishing device and a polishing method, which comprises a knife sharpening assembly for opening a clamshell edge composed of a pair of first edge surfaces, a pair of second edge surfaces and a pair of third edge surfaces on the blade part of the knife body. The two knife sharpening strips in the grinding unit can be adjusted in extension and retraction along the inclined direction, so that the grinding part of the knife sharpening strip can be replaced instead of the overall replacement of the knife sharpening strip after a period of use, and the replacement of the grinding part on the knife sharpening strip can be completed in the process of grinding without the overall shutdown of the equipment, effectively improving the utilization rate of the grinding surface on the knife sharpening strip and the production efficiency of the tool, effectively shortening the overall replacement cycle of the knife sharpening strip and improving the overall use efficiency of the knife sharpening strip, and further effectively reducing the replacement cost of the knife sharpening strip.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of knife edge grinding, and particularly relates to a knife edge grinding device and a grinding method. BACKGROUND

[0002] Knives are one of the most commonly used kitchen utensils in every household. The traditional knife edge is a V-shaped edge as shown in (a), and the V-shaped edge knife has sharp edges and excellent cutting performance. Moreover, the V-shaped edge has low difficulty in opening edge operation, and the wet opening edge method using a grinding wheel can well maintain the heat treatment performance of the knife material itself. However, the V-shaped edge has poor edge retention, and the V-shaped edge is prone to edge collapse when cutting hard objects. Most of the existing knife edges are V-shaped edges. Figure 10

[0003] The clam shell edge is another opening edge method of knives, and the side profile curve protrudes outward, similar to a clam shell, hence the name. During the cutting and chopping process, the contact surface between the edge surface and the chopped object is smaller than that of other V-shaped edges, and the resistance during chopping is small, so the knife edge has better retention and cutting performance, and the edge is more durable and easier to regrind.

[0004] As shown in (b), the opening edge of the clam shell edge requires multiple symmetrical grinding of three pairs of edge surfaces on the edge of the knife at different angles to form an edge, which requires certain grinding experience and high technical requirements, and the efficiency is low. Figure 10 Patent No. 201921350015.5 discloses an automatic edge opening device, which is only suitable for opening the edge of a V-shaped edge with one pair of edge surfaces and is not suitable for opening the edge of a clam shell edge with three pairs of edge surfaces. The freedom of the grinding wheel must be increased to enable it to swing to some extent and have the function of grinding edge surfaces at different angles. However, this operation has low edge opening efficiency because it cannot simultaneously grind the three edge surfaces of the clam shell edge, and a special automatic device capable of simultaneously grinding the three edge surfaces of the clam shell edge needs to be designed.

[0005] In addition, the grinding wheel or grinding strip needs to be replaced after a period of use due to wear and tear. Only a fixed part of the grinding wheel or grinding strip will wear out due to grinding, and the utilization rate of the grinding surface of the grinding wheel or grinding strip is low, resulting in a short replacement cycle of the grinding wheel or grinding strip and low efficiency of the grinding wheel or grinding strip. In turn, the replacement cost of the grinding wheel or grinding strip is high. At the same time, the equipment needs to be shut down for manual replacement when replacing the grinding wheel or grinding strip, affecting production efficiency.

[0006] The present application designs a knife edge grinding device and a grinding method to solve the above problems.

[0007] SUMMARY TECHNICAL FIELD

[0008] ​Based on this, it is necessary to provide a knife edge polishing device and polishing method for the problems existing in the current knife edge polishing equipment, the knife polishing assembly reciprocating under the driving of the third driving assembly is composed of two knife polishing units, each knife polishing unit is composed of three grinding units capable of grinding three blade surfaces of the blade part of the knife body respectively, and each grinding unit contains two grinding strips distributed crosswise and grinding one pair of V-shaped blade surfaces of the blade part of the knife body, the cross angle and cross point height of the grinding strips of the three grinding units in each grinding unit are different, so that the automatic opening of the clam blade with three pairs of V-shaped blade surfaces of the knife body fixed by the end clamping assembly of the mechanical arm under the driving of the third driving assembly is ensured, and the operator does not need to process three pairs of blade surfaces in sequence to form the clam blade and does not need to have the experience of polishing the clam blade, the technical requirement for opening the clam blade is not high, so that the efficiency and quality of opening the clam blade are effectively improved. The cross angle of the two grinding strips of any one grinding unit in the knife polishing unit can be adjusted, the larger the cross angle of the grinding strips, the thicker the clam blade edge polished by the grinding strips and the more conducive to chopping the object with large hardness, the smaller the cross angle of the grinding strips, the thinner the clam blade edge polished by the grinding strips and the more conducive to fine cutting of the soft food material, effectively increasing the use type of the processed knife. The opening of the clam blade of the blade part of the knife body has the advantage of high automation. The two grinding strips in the grinding unit in the application can be adjusted in extension along the inclined direction, so that the grinding parts of the grinding strips can be replaced after a period of use instead of replacing the grinding strips as a whole, and the replacement of the grinding parts on the grinding strips does not need to stop the whole equipment and can be completed during the grinding process, effectively improving the utilization rate of the grinding surface of the grinding strips and the production efficiency of the knife, effectively shortening the overall replacement cycle of the grinding strips and improving the overall use efficiency of the grinding strips, thereby effectively reducing the replacement cost of the grinding strips.

[0009] The above object is achieved by the following technical scheme:

[0010] A knife edge polishing device for opening a clam blade of a blade part of a knife body, comprising:

[0011] The knife sharpening assembly reciprocates along a straight line on the work platform under the driving of the third driving assembly, and is used for opening the clamshell edge composed of a pair of first edges, a pair of second edges and a pair of third edges on the blade. The knife sharpening assembly comprises two knife sharpening units distributed along the movement direction of the knife sharpening units. The knife sharpening unit comprises a second seat body sliding on the work platform. Three grinding units for processing a pair of first edges, a pair of second edges and a pair of third edges are arranged on the second seat body and distributed along the movement direction of the second seat body. The grinding unit comprises a pair of grinding strips distributed along the movement direction of the grinding strips and in a crossed state. The second seat body is provided with a second driving assembly for driving the grinding strips to swing and a first driving assembly for driving the grinding strips to stretch along the inclined direction of the grinding strips.

[0012] In one of the embodiments, the work platform is suspended by the supporting legs. The work platform is provided with a first slot for placing the blade to be sharpened and a second slot for placing the blade with the opened clamshell edge.

[0013] In one of the embodiments, the clamping assembly comprises a telescopic rod arranged at the end of the mechanical arm. A pressing spring is arranged in the telescopic rod to drive the telescopic rod to stretch. A first seat body is arranged at the end of the telescopic rod. A first sliding block is slidingly arranged in a second sliding groove on the lower surface of the first seat body. The first sliding block is threadedly connected with a first screw rod rotatably arranged on the first seat body. The first screw rod is drivingly connected with a first motor arranged on the first seat body. A first clamping block matched with one surface of the blade is arranged at the lower end of the first sliding block. A second clamping block matched with the other surface of the blade is arranged at the lower end of the first seat body.

[0014] In one of the embodiments, the telescopic rod comprises an inner rod and a rod sleeve which are sleeved with each other. The pressing spring is arranged in the rod sleeve. The two ends of the pressing spring are connected with the inner wall of the rod sleeve and the inner rod respectively.

[0015] In one of the embodiments, the third driving assembly comprises a sliding seat arranged at the lower end of the two second seat bodies and a third motor arranged on the work platform. The sliding seat is slidingly arranged in a first sliding groove on the work platform. The output shaft of the third motor is rotatably arranged in a circular hole on the work platform. A crank wheel is arranged on the output shaft of the third motor and located below the work platform. A connecting rod is hingedly connected between the crank wheel and the sliding seat.

[0016] In one of the embodiments, the lower end of each of the two grinding strips of the grinding unit is provided with a third sliding block. The two third sliding blocks are slidingly arranged in two second guide seats along the inclined direction of the corresponding grinding strips. The lower end of the second guide seat is provided with a second circular pin parallel to the movement direction of the second seat body. The second circular pin is rotatably arranged in a circular hole on a first support fixed to the second seat body.

[0017] In one of the embodiments, the first driving assembly comprises two first guides arranged on the second base body and a first rotating shaft arranged in the second base body, two second sliding blocks are arranged in the two first guides and slide in the vertical direction synchronously, the second sliding blocks are threadedly connected with second screws rotatably arranged on the corresponding first guides, the lower ends of the two second screws are provided with first gears, the two first gears are engaged with two second gears arranged at the two ends of the first rotating shaft respectively, a third gear is arranged on one of the second screws, the third gear is engaged with a fourth gear arranged on the output shaft of a second motor arranged outside the second base body, the output shaft of the second motor is rotatably arranged in a circular hole arranged on the second base body, the two second sliding blocks are integrally connected through a cross bar, two sliding sleeves corresponding to the third sliding blocks slide synchronously towards or away from each other on the cross bar, first round pins are arranged on the sliding sleeves, and the first round pins are rotatably arranged in the circular holes on the corresponding third sliding blocks.

[0018] In one of the embodiments, the second driving assembly comprises two circular arc worms, the two circular arc worms are arranged at the lower ends of two second guides in the corresponding grinding units respectively, the circular arc worms are engaged with worms rotatably arranged on the corresponding first supports, the lower ends of the worms are provided with fifth gears, the fifth gears are engaged with sixth gears, the sixth gears are arranged on second rotating shafts, the second rotating shafts are rotatably arranged in circular holes arranged on the second supports, the second supports are fixed on the second base body, the two second rotating shafts are provided with two seventh gears engaged with each other, a third rotating shaft is rotatably arranged in a circular hole on one of the first supports, the two ends of the third rotating shaft are provided with ninth gears and a twist wheel, the ninth gears are engaged with eighth gears arranged on the corresponding worms.

[0019] In one of the embodiments, a plurality of anti-skid lines are arranged on the rim of the twist wheel.

[0020] A grinding method of the blade grinding device is as follows:

[0021] S1, according to the edge thickness of the blade to be machined, the twist wheel of the second driving assembly of the grinding unit is rotated to adjust the intersection angle between the two grinding strips, and the matching of the circular arc worm and the worm locks the inclination angle of the grinding strip.

[0022] S2, after the intersection angle adjustment of the two grinding strips of the grinding unit in the grinding assembly is completed, the third motor in the third driving assembly is started to drive the grinding assembly to move reciprocally, and the reciprocating amplitude of the grinding assembly is greater than the length of the grinding unit or one-half of the length of the blade body.

[0023] S3, the mechanical arm end of the clamping assembly is set to clamp the first slot in the work platform on the knife body to be processed to the upper of the knife sharpening assembly, and the blade of the knife body is pressed down to the two grinding strips between the grinding unit of the knife sharpening assembly, in the process of pressing down the knife body, the three grinding units of the reciprocating grinding unit grind the blade of the knife body to form the clamshell blade composed of a pair of first blade surface, a pair of second blade surface and a pair of third blade surface.

[0024] S4, after the blade of the knife body completes the opening of the clamshell blade, the clamping assembly at the end of the mechanical arm moves the opened knife body to the second slot on the work platform for storage.

[0025] S5, when the two grinding strips in the grinding unit are worn after a period of use, the second motor in the first driving assembly is started to drive the two grinding strips in the grinding unit to slide a certain amplitude along the inclined direction of itself, so that the grinding part of the grinding strip is automatically replaced in the non-stop state.

[0026] The beneficial effects of the present application are:

[0027] 1, in the third driving assembly driving reciprocating grinding assembly is composed of two grinding units, and each grinding unit is composed of three grinding units which can grind three blade surfaces of the blade of the knife body, and each grinding unit contains two mutually intersecting distributed grinding strips which grind a pair of V-shaped distributed blade surfaces of the blade of the knife body, the intersection angle and intersection point height of the three grinding units in each grinding unit are different, so that the grinding assembly can automatically open the clamshell blade with three pairs of V-shaped blade surfaces of the knife body fixed by the mechanical arm end clamping assembly under the driving of the third driving assembly, without sequentially processing three pairs of blade surfaces to form the clamshell blade and without the experience of the operator in polishing the clamshell blade, the technical requirement of opening the clamshell blade is not high, thereby effectively improving the efficiency and quality of opening the clamshell blade.

[0028] 2, the intersection angle of the two grinding strips of any one grinding unit in the grinding unit of the present application can be adjusted, the larger the intersection angle of the grinding strip, the thicker the clamshell blade edge formed by the grinding strip, and it is beneficial to chop the object with large hardness, the smaller the intersection angle of the grinding strip, the thinner the clamshell blade edge formed by the grinding strip, and it is beneficial to finely cut the soft food material, effectively increasing the use type of the processed knife.

[0029] 3, the present application has the advantage of high automation degree in opening the clamshell blade of the blade of the knife body.

[0030] 4、The two grinding bars in the grinding unit in the application can be adjusted in extension along the tilting direction, so that the grinding parts on the grinding bar can be replaced instead of the whole grinding bar after a period of use, and the replacement of the grinding parts on the grinding bar can be completed in the process of grinding without the whole equipment shutdown, effectively improving the utilization rate of the grinding surface on the grinding bar and the production efficiency of the tool, effectively shortening the whole replacement cycle of the grinding bar and improving the overall use efficiency of the grinding bar, and further effectively reducing the replacement cost of the grinding bar. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the overall schematic diagram of the application;

[0032] Figure 2 is the connection cross-sectional view of the driving assembly and the grinding assembly in the application;

[0033] Figure 3 is the cross-sectional view of the clamping assembly;

[0034] Figure 4 is the cross-sectional view of the grinding assembly opening the blade of the tool body;

[0035] Figure 5 is the schematic diagram of the grinding unit in the grinding assembly of the application;

[0036] Figure 6 is the first cross-sectional view of the grinding unit on the grinding unit;

[0037] Figure 7 is the second cross-sectional view of the grinding unit on the grinding unit;

[0038] Figure 8 is the third cross-sectional view of the grinding unit on the grinding unit;

[0039] Figure 9 is the fourth cross-sectional view of the grinding unit on the grinding unit;

[0040] Figure 10 is the schematic diagram of three states of the clamshell blade opening method;

[0041] Figure 11 is the schematic diagram of the clamshell blade opening of the three grinding units on the grinding unit to the tool body;

[0042] Figure 12 is the schematic diagram of the tool body entering the three grinding units on the grinding unit for opening;

[0043] Label name in the figure:

[0044] 101, leg; 102, working platform; 103, first sliding groove; 104, first slot; 105, second slot; 106, mechanical arm; 107, blade body; 108, first blade surface; 109, second blade surface; 110, third blade surface;

[0045] 200, clamping assembly; 201, first seat body; 202, second sliding groove; 203, first sliding block; 204, first screw rod; 205, first motor; 206, first clamping block; 207, second clamping block; 208, telescopic rod; 209, inner rod; 210, rod sleeve; 211, pressure spring;

[0046] 300, knife sharpening assembly; 302, knife sharpening unit; 303, second seat body; 304, grinding unit; 305, first guide seat; 306, second sliding block; 307, cross rod; 308, sliding sleeve; 309, first round pin; 310, third sliding block; 311, knife sharpening strip; 312, second guide seat; 313, second round pin; 314, first support; 315, first driving assembly; 316, second screw rod; 317, first gear; 318, second gear; 319, first rotating shaft; 320, third gear; 321, fourth gear; 322, second motor; 323, second driving 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;

[0047] 400, third driving assembly; 401, third motor; 402, crank wheel; 403, connecting rod; 404, sliding seat. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0049] The serial numbers of components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0050] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0051] As shown in Figures 1-12 A blade sharpening device for opening the clamshell blade of the blade part of the blade body 107, comprising:

[0052] The grinding assembly 300 driven by the third driving assembly 400 moves linearly and reciprocally on the working platform 102, and is used for opening the clamshell blade composed of a pair of first blade surfaces 108, a pair of second blade surfaces 109 and a pair of third blade surfaces 110 on the blade part of the blade body 107. The grinding assembly 300 comprises two grinding units 302 distributed along the movement direction thereof, and the grinding unit 302 comprises a second seat body 303 sliding on the working platform 102. The second seat body 303 is provided with three grinding units 304 distributed along the movement direction thereof and respectively used for machining a pair of first blade surfaces 108, a pair of second blade surfaces 109 and a pair of third blade surfaces 110. The grinding unit 304 comprises a pair of grinding strips 311 distributed along the movement direction thereof and in a crossed state. The second seat body 303 is provided with a second driving assembly 323 for driving the grinding strip 311 to swing and a first driving assembly 315 for driving the grinding strip 311 to stretch and contract along the inclined direction thereof.

[0053] In further embodiments, as Figure 1As shown, the working platform 102 is suspended by the supporting leg 101, and the working platform 102 is provided with a first slot 104 for placing the blade body 107 to be ground and a second slot 105 for placing the blade body 107 whose blade is opened.

[0054] In further embodiments, as shown in Figure 1 , Figure 2 、 Figure 3 As shown, the clamping assembly 200 includes a telescopic rod 208 arranged at the end of the mechanical arm 106, the telescopic rod 208 is provided with a pressure spring 211 arranged therein to drive the extension of the telescopic rod 208, the end of the telescopic rod 208 is provided with a first seat body 201, the second sliding groove 202 of the lower surface of the first seat body 201 is slidably provided with a first sliding block 203, the first sliding block 203 is threadedly connected with a first screw rod 204 rotatably arranged on the first seat body 201, the first screw rod 204 is drivingly connected with a first motor 205 arranged on the first seat body 201, the lower end of the first sliding block 203 is provided with a first clamping block 206 matched with one surface of the blade body 107, and the lower end of the first seat body 201 is provided with a second clamping block 207 matched with the other surface of the blade body 107.

[0055] In further embodiments, as shown in Figure 3 The telescopic rod 208 is composed of an inner rod 209 and a rod sleeve 210 which are sleeved with each other, the pressure spring 211 is arranged in the rod sleeve 210, and the two ends of the pressure spring 211 are respectively connected with the inner wall of the rod sleeve 210 and the inner rod 209.

[0056] In further embodiments, as shown in Figure 2 The third driving assembly 400 includes a sliding seat 404 arranged at the lower end of the two second seat bodies 303 and a third motor 401 arranged on the working platform 102, the sliding seat 404 is slidably arranged in the first sliding 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, the output shaft of the third motor 401 is provided with a crank wheel 402, and the crank wheel 402 is located below the working platform 102, and the connecting rod 403 is hingedly connected between the crank wheel 402 and the sliding seat 404.

[0057] In further embodiments, as shown in Figure 6 、 Figure 7 、 Figure 9As shown, the lower end of each of the two grinding bars 311 in the grinding unit 304 is provided with a third sliding block 310, and the two third sliding blocks 310 slide in two second guide bases 312 along the inclined direction of the corresponding grinding bar 311, respectively. The lower end of the second guide base 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 arranged in a round hole in a first support 314 fixed to the second seat body 303.

[0058] In further embodiments, as shown in Figure 6 、 Figure 7 The first driving assembly 315 includes two first guide bases 305 arranged on the second seat body 303 and a first rotating shaft 319 arranged in the second seat body 303. Two second sliding blocks 306 are synchronously arranged in the two first guide bases 305 in the vertical direction. The second sliding blocks 306 are threadedly connected with second screws 316 rotatably arranged on the corresponding first guide bases 305. The lower end of each of the two second screws 316 is provided with a first gear 317. The two first gears 317 are engaged with two second gears 318 at both ends of the first rotating shaft 319, respectively. A third gear 320 is arranged on one of the second screws 316. The third gear 320 is engaged with a fourth gear 321 on the output shaft of a second motor 322 outside the second seat body 303. The output shaft of the second motor 322 is rotatably arranged in a round hole in the second seat body 303. The two second sliding blocks 306 are integrally connected by a cross bar 307. The cross bar 307 synchronously slides two sliding sleeves 308 corresponding to the third sliding blocks 310 in the same direction or in opposite directions. The sliding sleeves 308 are provided with first round pins 309 rotatably arranged in round holes in the corresponding third sliding blocks 310.

[0059] In further embodiments, as shown in Figure 8 、 Figure 6 、 Figure 7 、 Figure 9As shown, the second driving assembly 323 comprises two circular arc worm gears 324, which are respectively arranged at the lower ends of the two second guides 312 in the corresponding grinding units 304. The circular arc worm gears 324 are engaged with the worm gears 325 rotatably arranged on the corresponding first supports 314. The lower ends of the worm gears 325 are provided with the fifth gears 326, which are engaged with the sixth gears 327 arranged on the second rotating shafts 328 rotatably arranged in the circular holes of the second supports 334 fixed on the second seat bodies 303. The two second rotating shafts 328 are provided with the seventh gears 329 engaged with each other. The third rotating shaft 332 is rotatably arranged in the circular hole of the first support 314, and the two ends of the third rotating shaft 332 are provided with the ninth gears 331 and the twist wheels 333. The ninth gears 331 are engaged with the eighth gears 330 on the corresponding worm gears 325.

[0060] In further embodiments, as Figure 9 As shown, the rim of the twist wheel 333 is provided with anti-skid lines.

[0061] A polishing method of the blade polishing device is as follows:

[0062] S1. According to the edge thickness of the clamshell blade to be processed, the twist wheel 333 of the second driving assembly 323 in the grinding unit 304 is rotated to adjust the intersection angle between the two grinding strips 311. The matching of the circular arc worm gears 324 and the worm gears 325 locks the inclination angle of the grinding strips 311.

[0063] S2. After the intersection angle adjustment of the two grinding strips 311 in the grinding unit 304 of the grinding assembly 300 is completed, the third motor 401 in the third driving assembly 400 is started to drive the grinding assembly 300 to reciprocate. The reciprocating amplitude of the grinding assembly 300 is greater than one-half of the length of the grinding unit 302 or the length of the blade body 107.

[0064] S3. The blade body 107 in the first slot 104 on the work platform 102 is clamped above the grinding assembly 300 by the clamping assembly 200 arranged at the end of the mechanical arm 106, and the blade part of the blade body 107 is pressed down between the two grinding strips 311 in the grinding unit 304 of the grinding assembly 300. During the pressing process of the blade body 107, the three grinding units 304 in the reciprocating grinding unit 302 grind the blade part of the blade body 107 into a clamshell blade composed of a pair of first blade surfaces 108, a pair of second blade surfaces 109, and a pair of third blade surfaces 110.

[0065] S4, after the blade part of the blade body 107 is opened to the clam shell blade, the opened blade body 107 is moved to the second slot 105 on the work platform 102 by the clamping assembly 200 at the end of the mechanical arm 106 for storage.

[0066] S5, when the two grinding strips 311 in the grinding unit 304 are worn after being used for a period of time, the second motor 322 in the first driving assembly 315 is started to drive the two grinding strips 311 in the grinding unit 304 to slide in the inclined direction of the grinding strip 311 by a certain amplitude, so that the grinding part of the grinding strip 311 is automatically replaced in the non-stop state.

[0067] The grinding assembly 300 reciprocated under the driving of the third driving assembly 400 in the application is composed of two grinding units 302, each of which is composed of three grinding units 304 capable of grinding three blade surfaces of the blade part of the blade body 107, and each grinding unit 304 contains two grinding strips 311 intersecting with each other and capable of grinding a pair of V-shaped blade surfaces of the blade part of the blade body 107. The intersection angle and intersection point height of the grinding strips 311 of the three grinding units 304 in each grinding unit 302 are different, so that the grinding assembly 300 can automatically open the clam shell blade with three pairs of V-shaped blade surfaces of the blade body 107 fixed by the clamping assembly 200 at the end of the mechanical arm 106 under the driving of the third driving assembly 400, without the need for sequentially processing three pairs of blade surfaces to form a clam shell blade and without the need for the operator to have experience in polishing a clam shell blade, so that the technical requirements for opening a clam shell blade are not high, thereby effectively improving the efficiency and quality of opening a clam shell blade. The intersection angle of the two grinding strips 311 of any one grinding unit 304 in the grinding unit 302 of the application can be adjusted. The larger the intersection angle of the grinding strips 311, the thicker the blade edge of the clam shell blade polished by the grinding strips 311 and the more conducive to chopping hard objects. The smaller the intersection angle of the grinding strips 311, the thinner the blade edge of the clam shell blade polished by the grinding strips 311 and the more conducive to fine cutting of soft food materials, effectively increasing the use types of the processed cutters. The application has the advantage of high automation degree in opening the clam shell blade of the blade part of the blade body 107. The two grinding strips 311 in the grinding unit 304 in the application can be adjusted in the inclined direction, so that the grinding part of the grinding strip 311 can be replaced after being used for a period of time instead of replacing the grinding strip 311 as a whole, and the replacement of the grinding part on the grinding strip 311 can be completed in the process of grinding without stopping the whole equipment, effectively improving the utilization rate of the grinding surface of the grinding strip 311 and the production efficiency of the cutter, effectively shortening the overall replacement cycle of the grinding strip 311 and improving the overall use efficiency of the grinding strip 311, thereby effectively reducing the replacement cost of the grinding strip 311.

[0068] The operation process of the application is as follows:

[0069] According to the edge thickness of the clamshell blade to be machined on the blade body 107, the rotation of the worm wheel 333 of the second driving assembly 323 in the grinding unit 304 adjusts the intersection angle between the corresponding two grinding strips 311.

[0070] The adjustment process of the two grinding strips 311 in the grinding unit 304 is as follows: rotate the worm wheel 333, which drives the corresponding grinding strip 311 to swing a certain angle through the third shaft 332, the ninth gear 331, the eighth gear 330, the worm 325, the circular arc worm wheel 324, the second guide base 312 and the third slider 310. The worm 325 drives the other grinding strip 311 to swing the same angle through the corresponding fifth gear 326, the sixth gear 327, the second shaft 328, the two seventh gears 329, the other second shaft 328, the sixth gear 327, the fifth gear 326, the other worm 325, the other circular arc worm wheel 324, the other second guide base 312 and the third slider 310, thereby completing the adjustment of the intersection angle of the two grinding strips 311 in the grinding unit 304, and the cooperation of the circular arc worm wheel 324 and the worm 325 locks the inclination angle of the grinding strip 311.

[0071] After the intersection angle adjustment of the two grinding strips 311 of each grinding unit 304 in the to-be-ground assembly 300 is completed, the third motor 401 in the third driving assembly 400 is started to drive the grinding assembly 300 to reciprocate, and the reciprocating amplitude of the grinding assembly 300 is greater than the length of the grinding unit 302 or half the length of the blade body 107.

[0072] Then, the to-be-machined blade body 107 in the first slot 104 on the work platform 102 is clamped above the grinding assembly 300 by the clamping assembly 200 arranged at the end of the mechanical arm 106, and the blade part of the blade body 107 is pressed down between the two grinding strips 311 of the grinding unit 304 in the grinding assembly 300. During the pressing down of the blade body 107, the three grinding units 304 in the reciprocating grinding unit 302 grind the blade part of the blade body 107 into a clamshell blade composed of a pair of first blade surfaces 108, a pair of second blade surfaces 109 and a pair of third blade surfaces 110.

[0073] The clamping process of the clamping assembly 200 to the blade body 107 is as follows:

[0074] The first motor 205 in the clamping assembly 200 is started, and the first motor 205 drives the first clamp block 206 to press the blade body 107 against the second clamp block 207 through the first screw rod 204 and the first sliding block 203, so that the first clamp block 206 and the second clamp block 207 together form an effective clamping on the blade body 107. Then, the clamping assembly 200 with the clamped blade body 107 is moved to the upper side of the grinding assembly 300 by the mechanical arm 106 and is pressed down. After the blade of the blade body 107 abuts against the grinding strip 311 of the grinding assembly 300, the outer sleeve of the telescopic rod 208 moves downward relative to the inner rod 209 under the low pressure of the mechanical arm 106 and further compresses the pressing spring 211. The further compressed pressing spring 211 makes the blade body 107 continuously move downward during the grinding of the blade of the blade body 107 and finally forms a clamshell blade.

[0075] After the blade of the blade body 107 completes the opening of the clamshell blade, the clamping assembly 200 at the end of the mechanical arm 106 moves the opened blade body 107 to the second slot 105 on the working platform 102 for storage.

[0076] When the two grinding strips 311 in the grinding unit 304 are worn after a period of use, the second motor 322 in the first driving assembly 315 is started to drive the two grinding strips 311 in the grinding unit 304 to synchronously slide in the inclined direction of the grinding strips 311 by a certain amplitude, so that the grinding parts of the grinding strips 311 are automatically replaced in a non-stop state. The replacement process of the grinding parts of the grinding strips 311 is as follows:

[0077] The second motor 322 in the first driving assembly 315 is started, and the second motor 322 drives the corresponding second screw rod 316 to rotate through the fourth gear 321 and the third gear 320. The second screw rod 316 drives the second screw rod 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 screw rods 316 drive the two second sliding blocks 306 to synchronously move upward. The cross rod 307 drives the two third sliding blocks 310 to slide obliquely upward along the corresponding second guide base 312 through the two sliding sleeves 308 under the driving of the two second sliding blocks 306. The two third sliding blocks 310 simultaneously drive the two grinding strips 311 to synchronously slide obliquely upward by the same amplitude and complete the replacement of the grinding parts on the grinding strips 311. During the inclined movement of the grinding strips 311, the sliding sleeves 308 slide on the cross rod 307 by a corresponding distance.

Claims

1. A blade sharpening device for sharpening the edge of a knife, characterized in that, It includes: The grinding tool assembly reciprocates linearly on the working platform under the driving of the third driving assembly, and is used for opening the clamshell edge composed of a pair of first edge surfaces, a pair of second edge surfaces and a pair of third edge surfaces on the blade part of the tool body. The grinding tool assembly includes two grinding units distributed along the movement direction thereof, and the grinding unit includes a second seat body sliding on the working platform. A third sliding block is arranged at the lower end of each of the two grinding strips in the grinding unit and slides in the corresponding second guide seat along the inclined direction of the grinding strip. The lower end of the second guide seat is provided with a second round pin parallel to the movement direction of the second seat body. The second round pin is rotatably arranged in the round hole of the first support fixed to the second seat body. 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 sliding blocks are synchronously arranged in the vertical direction in the two first guide seats. The second sliding blocks are threadedly connected with the second screws rotatably arranged on the corresponding first guide seats. The lower ends of the two second screws are provided with first gears. The two first gears are engaged with the second gears at the two ends of the first rotating shaft, respectively. A third gear is arranged on one of the second screws and engaged with a fourth gear on the output shaft of the second motor on the outer side of the second seat body. The output shaft of the second motor is rotatably arranged in the round hole of the second seat body. The two second sliding blocks are integrally connected by a cross bar. The cross bar is synchronously slid in the same direction or opposite directions and provided with two sliding sleeves corresponding to the third sliding blocks. The sliding sleeves are provided with first round pins rotatably arranged in the round holes on the corresponding third sliding blocks. The working platform is suspended by the supporting legs. The working platform is provided with a first slot for placing the tool body to be ground and a second slot for placing the tool body with the completed clamshell edge.

2. A blade sharpening device according to claim 1, wherein, The clamping assembly includes an extension rod arranged at the end of the mechanical arm. The extension rod is provided with a pressure spring arranged therein to drive the extension rod to extend. The end of the extension rod is provided with a first seat body. A first sliding block is slidably arranged in a second sliding groove on the lower surface of the first seat body. The first sliding block is threadedly connected with a first screw rotatably arranged on the first seat body. The first screw is drivingly connected with a first motor arranged on the first seat body. The lower end of the first sliding block is provided with a first clamping block matched with one surface of the tool body. The lower end of the first seat body is provided with a second clamping block matched with the other surface of the tool body.

3. A blade sharpening device according to claim 1, wherein, The extension rod is composed of an inner rod and a rod sleeve which are sleeved with each other. The pressure spring is arranged in the rod sleeve. The two ends of the pressure spring are connected with the inner wall of the rod sleeve and the inner rod, respectively.

4. A blade sharpening device according to claim 3, wherein ​ 5. The knife edge sharpening device of claim 1, wherein, The third driving assembly comprises a sliding seat arranged at the lower end of the two second seat bodies and a third motor arranged on the working platform, the sliding seat is slidingly arranged in a first sliding groove on the working platform, the output shaft of the third motor is rotatably arranged in a circular hole on the working platform, a crank wheel is arranged on the output shaft of the third motor and located below the working platform, and a connecting rod is hingedly connected between the crank wheel and the sliding seat.

6. A blade sharpening device according to claim 1, wherein, The second driving assembly comprises two circular arc worm gears, the two circular arc worm gears are respectively arranged at the lower end of the two second guides in the corresponding grinding units, the circular arc worm gears are in mesh with the worm gears rotatably arranged on the corresponding first supports, the lower end of the worm gear is provided with a fifth gear, the fifth gear is in mesh with a sixth gear, the sixth gear is arranged on a second rotating shaft, 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, two seventh gears in mesh with each other are arranged on the two second rotating shafts, a third rotating shaft is rotatably arranged in a circular hole on one of the first supports, the two ends of the third rotating shaft are provided with a ninth gear and a torsion wheel, and the ninth gear is in mesh with an eighth gear on the corresponding worm gear.

7. A blade sharpening device according to claim 6, wherein A plurality of anti-skid lines are arranged on the rim of the torsion wheel.

8. The method of sharpening a knife edge as defined in claim 1 wherein, The polishing method comprises the following steps: S1, according to the blade thickness of the clamshell blade to be processed, rotating the torsion wheel of the second driving assembly in the grinding unit to adjust the intersection angle between the two grinding strips, and the circular arc worm gears and the worm gears are locked to the inclination angle of the grinding strips; S2, after the intersection angle between the two grinding strips of the grinding unit in the grinding assembly is adjusted, the third motor in the third driving assembly is started to drive the grinding assembly to reciprocate, and the reciprocation range of the grinding assembly is greater than the length of the grinding unit or half the length of the blade body; S3, the blade body in the first insertion slot on the working platform is clamped above the grinding assembly by the clamping assembly arranged at the end of the mechanical arm, and the blade part of the blade body is pressed down between the two grinding strips in the grinding unit of the grinding assembly, in the process of pressing down the blade body, the three grinding units in the reciprocating grinding unit grind the blade part of the blade body into a clamshell blade composed of a pair of first blade surfaces, a pair of second blade surfaces and a pair of third blade surfaces; S4, after the blade part of the blade body is opened into a clamshell blade, the opened blade body is moved into the second insertion slot on the working platform by the clamping assembly at the end of the mechanical arm for storage; S5, when the two grinding strips in the grinding unit are worn after a period of use, the second motor in the first driving assembly is started to drive the two grinding strips in the grinding unit to slide a certain range along the inclination direction of the grinding strips, so that the grinding parts of the grinding strips are automatically replaced without stopping.

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