Self-sharpening ploughshare based on coating biomimetic structure design

Abstract

The application discloses a self-sharpening ploughshare based on a coating bionic structure design. The self-sharpening ploughshare capable of repeatedly forming a sharp cutting edge in abrasion is obtained by taking shark teeth as a prototype and through coating structure design, and the sawtooth-shaped edge formed by abrasion can effectively reduce soil resistance, the service life of the ploughshare is improved in combination with the repeatedly formed characteristics, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of agricultural machinery, and relates to a hydraulic turnover plow equipped on a micro ploughing machine / turnover ploughing machine, in particular to a self-grinding blade coating structure design of a plowshare and a plow share for the hydraulic turnover plow. BACKGROUND

[0002] Ploughing plays an irreplaceable role in crop growth. Through deep ploughing, the physical properties of the soil can be improved, the water permeability and air permeability of the soil can be increased, the soil nutrient content can be increased, the soil water and soil conservation capacity and the soil fertility conservation capacity can be improved, the activity of beneficial microorganisms in the soil can be increased, and weeds and pests can be eliminated and reduced. Ploughing creates good conditions for crop growth and provides a guarantee for farmers to increase production and income. In recent years, with the development of urbanization and the rapid growth of rural economy, agricultural cultivation is gradually developing towards centralization and large-scale farming, and agricultural production methods are developing towards full mechanization, which puts forward higher requirements for the development and use of agricultural machinery. Hydraulic turnover plows have become one of the main land cultivation machines.

[0003] Agricultural machinery has limited durability, which can lead to failure and even equipment downtime. In terms of durability, the most critical component of tillage machinery is the soil-engaging tool. These tools cut, crush, loosen, and turn over the soil to promote crop growth, and their edges are the most active areas during the working process (e.g., the cutting edge), so they are affected by wear phenomena. And wear can damage tool performance, which in turn affects tillage quality, machine maintenance costs, and fuel consumption. The serious wear of the cutting edge caused by the contact between the plowshare and the soil in the hydraulic turnover plow is the main reason for its damage and failure. No matter what material the plowshare is made of, even if the cutting angle is very small and the cutting edge is very sharp, after a period of tillage, the cutting edge will be worn and become a circular arc due to the difference in the force of the soil on the cutting edge. For a standard plowshare, a back ridge will be formed after wear, and the back ridge will develop quickly after it is formed, especially when working in dry and hard soil. Once the plowshare cutting edge is dull and becomes a circular arc, the soil flow pattern, pressure distribution, sliding speed, and working temperature will change significantly, which will accelerate the development of the back ridge, and the wear rate will increase as the circular arc range increases, so limiting the development of the back ridge to some extent can effectively improve the service life of the plowshare.

[0004] Preparing wear-resistant coating on the lower working surface of the share blade edge makes the upper and lower working surfaces have different wear rates, which becomes an effective measure to limit the development of back ridge. Since the wear rate of the wear-resistant coating on the lower working surface is obviously lower than that of the upper working surface, according to the wear stabilization process of the share, the wear of the lower layer is slower than that of the substrate surface of the ordinary share without coating, and the development of back ridge is inhibited. Generally, the thickness of the wear-resistant coating in the range of 1-2 mm can meet the working requirements, that is, the wear-resistant coating will not quickly wear out, and will not also have a great impact on the earth penetration resistance (the wear-resistant coating will increase the resistance when the share penetrates into the soil, and will have a reverse effect on the earth penetration performance of the share). In addition, the wear-resistant coating should not be too thick, and the difference between the wear rates of the upper and lower layers should not be too large. If the wear-resistant coating is too thick and the wear rate is too low, the upper layer of the share may quickly wear out while the lower layer has little wear during work, so that the blade edge wears into a thin sheet with a sunken type and then breaks.

[0005] Currently, in order to prolong the fault-free production time of agricultural machinery products and improve the overall processing level, the cutting parts and other blades of the agricultural machinery products can be provided with a blade edge with different surface and inner hardness obtained by surface strengthening processes such as chemical heat treatment, surfacing, spraying and cladding to achieve self-grinding effect. The corresponding blade edge is also called self-grinding blade. However, the agricultural machinery products often only cover a small wear-resistant coating (i.e. the wear-resistant coating has a small width and a certain thickness limit, and the covered area is a standard rectangle) on the edge of the blade edge, resulting in short-term self-grinding effect. It can be seen that for different blades, the working environment is different, and the structure of the required wear-resistant coating is also different. Therefore, it is a problem to be studied to prepare a self-grinding blade coating on the surface of the share which can make the wear-resistant and drag-reducing performance and the service life of the share reach a better level.

[0006] In addition, Chinese Patent CN205105554U discloses a sawtooth grape burying machine, the plow wings of the front and rear shares have sawtooth edges, and the main function is to improve the soil taking and crushing performance by forming a sawtooth type plow body with the plow wall. SUMMARY

[0007] The purpose of the present application is to provide a self-grinding blade share based on the design of the bionic structure of the coating, to simulate the structure of the shark teeth on the wear-resistant coating, to make the share blade edge achieve self-grinding effect during work, and to significantly improve the wear-resistant and drag-reducing performance of the share and prolong the service life of the share.

[0008] To achieve the above purpose, the present application adopts the following technical solutions:

[0009] In a first aspect, a self-grinding blade share is provided, which includes a share base body and a bionic coating structure. The bionic coating structure includes one or more wear-resistant coatings arranged on the lower working surface of the blade edge of the share base body. The side edge of the wear-resistant coating is sawtooth-shaped, and the tip of each sawtooth of the side edge (i.e. the sawtooth-shaped edge of the wear-resistant coating) of the wear-resistant coating faces the edge of the blade edge of the share base body.

[0010] Preferably, the wear-resistant coating is multilayer, and the arrangement of the multilayer wear-resistant coating in the thickness direction of the wear-resistant coating is stacking.

[0011] Preferably, in the multilayer wear-resistant coating, the jagged edges of the wear-resistant coating in the upper layer are staggered with the jagged edges of the wear-resistant coating in the lower layer in the arrangement mode of being spaced apart in the direction away from the cutting edge of the share base, thereby forming a multilayer jagged coating with a gradient structure.

[0012] Preferably, the angle of the jagged tip is 30°-60°. If the angle is too small, the jagged cutting edge of the share base is prone to breakage during work; and if the angle is too large, the soil entering performance of the jagged cutting edge is affected, which is not conducive to reducing the soil entering resistance.

[0013] Preferably, the bionic coating structure specifically comprises multiple wear-resistant coatings (such as the above multilayer jagged coating) spaced apart from each other (i.e. leaving part of the blank base between the two adjacent wear-resistant coatings), and the jagged edges of the first wear-resistant coating are flush with the cutting edge of the share base (i.e. the jagged tips of the jagged edges of the wear-resistant coating are placed on the cutting edge of the share base).

[0014] Preferably, the share base is a trapezoidal share (the lower working surface is trapezoidal), a chisel-shaped share, or a triangular share without a coating on the surface.

[0015] Preferably, the ratio of the wear amount of the share base to the wear amount of the bionic coating structure is 2.9-3.4:1. The wear amount ratio is in the range close to 3 and by taking the highest possible ratio, the bionic coating structure can adapt to different working environments, and the best use requirements (including limiting the development of back spurs) can be achieved without too low ratio.

[0016] Preferably, the material of the wear-resistant coating is one or more of WC-MoS2, WC-Co, WC-Fe, and TiN-MoS2, wherein the specific composition and proportion of each material are determined according to the above wear amount ratio.

[0017] In the second aspect, a hydraulic reversible plow using the self-wearing blade share is provided.

[0018] In the third aspect, a plowing machine is provided, which comprises a hydraulic reversible plow using the self-wearing blade share.

[0019] In the fourth aspect, a self-wearing blade coating bionic structure design method is provided, which comprises the following steps:

[0020] Taking the sawtooth distribution and gradient structure of shark teeth as a prototype, a wear-resistant coating with a sawtooth-shaped edge is used to build a self-grinding edge bionic coating structure on a substrate by controlling the wear amount to form a corresponding edge shape.

[0021] Preferably, the wear-resistant coating is stacked in multiple layers on the substrate.

[0022] Preferably, the bionic coating structure separates the wear-resistant coatings of different passes by reserving part of the blank substrate.

[0023] The beneficial effects of the present application are embodied in:

[0024] The self-grinding edge share plough based on the bionic coating structure design can obtain a specific edge shape during the working process due to the sawtooth-shaped wear-resistant coating (i.e. due to the different wear amounts, the part of the blank substrate without coating is removed first until the sawtooth-shaped edge shape is obtained). This self-grinding edge structure greatly improves the drag reduction performance of the share plough, thereby improving the operation quality of the machine (e.g. a plowing machine) and reducing the operation loss and energy consumption of the machine.

[0025] Further, the self-grinding edge share plough based on the bionic coating structure design can make the sawtooth-shaped edge reappear after the substrate is worn due to the repeated multiple wear-resistant coatings and part of the blank substrate, which greatly reduces the wear rate of the share plough in the later stage of use, improves the service life of the share plough, and saves production costs.

[0026] Further, the self-grinding edge share plough based on the bionic coating structure design can obtain a self-grinding edge share plough with better self-grinding effect by controlling the ratio between the wear amount of each wear-resistant coating and the substrate, which makes the back ridge formed after the substrate is worn smaller compared to ordinary share ploughs, and the service life of the share plough longer. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structure diagram of the self-grinding edge share plough based on the bionic coating structure design in Example 1;

[0028] Figure 2 It is a schematic diagram of the local magnification of the wear-resistant coating (the part in the circle); Figure 1

[0029] Figure 3 It is a cross-sectional view of the wear-resistant coating and the lower working surface of the share edge (only the multiple layer stacking of the first pass of the wear-resistant coating on the lower working surface of the share edge is shown); Figure 1

[0030] Figure 4-1 It is a three-wedge force diagram;

[0031] Figure 4-2 ​​A normal section view of the stress state of the blade edge part of the ploughshare;

[0032] Figure 4-3 A schematic diagram of the wear profile stabilization process of the blade edge of the ploughshare: A refers to the tip of the blade edge of the ploughshare, B refers to the upper working surface of the blade edge of the ploughshare, and C refers to the lower working surface of the blade edge of the ploughshare;

[0033] In the figure: 1-ploughshare base body, 2-wear-resistant coating. DETAILED DESCRIPTION

[0034] The application will be further described in detail below in combination with the accompanying drawings and examples. The examples are only used to explain the application, and are not a limitation on the scope of protection of the application.

[0035] Example 1

[0036] (I) Coating bionic structure design of self-sharpening ploughshare

[0037] Referring to Figure 1 , the self-sharpening ploughshare in this embodiment includes a ploughshare base body 1 and a bionic coating structure. The ploughshare base body 1 is a trapezoidal ploughshare commonly used in tillage machines (for example, a standard 50 type ploughshare). The bionic structure coating is two repeatedly stacked WC-MoS2 wear-resistant coatings 2 prepared on the lower working surface of the blade edge of the ploughshare base body 1 by laser cladding. The part between each repeatedly stacked wear-resistant coating 2 is a blank base body without wear-resistant coating.

[0038] Referring to Figure 2 and Figure 3 , the tip of the sawtooth-shaped edge of one wear-resistant coating 2 is close to the edge of the blade of the trapezoidal ploughshare, and the tip of the sawtooth-shaped edge of the other wear-resistant coating 2 is also directed towards the edge of the blade of the trapezoidal ploughshare (i.e., closer to the edge of the blade of the trapezoidal ploughshare than the other side without a sawtooth-shaped edge). Under the premise that the angle of the tip (i.e., the sawtooth sharpness) is appropriate and the number of sawteeth is not too small (when the width range of the wear-resistant coating is constant, the smaller the sawtooth sharpness, the more the number of sawteeth. After selecting the sawtooth sharpness, the number of sawteeth can be adjusted by adjusting the width range of the wear-resistant coating. For a standard 50 type ploughshare, the number of sawteeth is not less than 20), the span (i.e., the interval distance) of the two repeatedly stacked wear-resistant coatings 2 is determined according to the size and cost of the trapezoidal ploughshare, wherein the repeatedly stacked wear-resistant coating 2 refers to the WC-MoS2 coating with the same structure (i.e., the same sawtooth sharpness) being stacked three layers in a staggered manner, each layer (specifically, one side of the sawtooth-shaped edge) being offset by a certain distance away from the edge of the blade of the trapezoidal ploughshare to form a three-layer gradient structure wear-resistant coating 2 with gradually decreasing area repeatedly cladded on the ploughshare base body 1 from the inside to the outside.

[0039] Among them, the ratio of the wear amount of the wear-resistant coating 2 (all two coatings) to the wear amount of the ploughshare base body 1 is about 1:3, and the specific reason is analyzed as follows:

[0040] Assuming the plowshare moves at a constant velocity *v* in a straight line through the soil during tillage, the static equilibrium method can be used to analyze the forces acting on the plowshare during its movement. A three-sided wedge model is established for the force analysis. The three mutually perpendicular coordinate planes of the spatial rectangular coordinate system Oxyz constitute the three sides of the three-sided wedge OABC. Figure 4-1 In the diagram, θ is the soil-lifting angle, β is the soil-turning angle, α is the soil-pushing angle, ε is the moldboard angle, η is the angle between the soil track line and the moldboard cutting edge, CC' is the soil track line, and P... f For the normal component P n The frictional force generated (P) f =f·Pn), P n For P ± The normal component of the force P acting on the working surface of the three-sided wedge. ± The resistance of the soil to the working face (P) ± =Kt·ab), where BC is the plowshare cutting edge. Draw a perpendicular line from the origin O to the cutting edge BC at point D, establishing a rectangular coordinate system Duwz, where the w-axis lies on the extension of OD, and the u-axis is parallel to the cutting edge. The normal section of the plowshare cutting edge is shown below. Figure 4-2 As shown, where δ is the cutting edge angle, γ s For the cutting angle, γ c The slit angle is typically found in newly sharpened plowshares. c It is positive, but when the cutting edge wears and back edge appears, the clearance angle will become negative. To make it easier to distinguish, the clearance angle is represented by γ when it is negative.

[0041] exist Figure 4-2 In the middle, R w With R z These represent the horizontal and vertical resistance forces experienced by the plowshare cutting edge, respectively; P w and P z These represent the horizontal and vertical forces exerted by the plowshare on the plowshare, respectively; ε is the plowshare angle. Considering the forces acting on both the plowshare and the cutting edge, based on static equilibrium:

[0042] R z +P z -P nm cosε+P fm sinη m sinε-P nr cosγ s +P fr sinη r sinγ s =0 (1)

[0043] P w -R w -P fm sinη m cosε-P nmsinε-P fr sinη r cosγ s -P nr sinγ s =0 (2)

[0044] Among them, P nm P is the normal component of the force on the plowshare. fm P is the tangential component of the force on the plowshare surface. nr P is the normal component of the force on the cutting edge. fr η is the tangential component of the force on the cutting edge of the plowshare. m η is the angle between the soil trace line and the plowshare surface. r The angle between the soil trace line and the cutting edge face;

[0045] After substituting the known conditions and simplifying, we get:

[0046]

[0047] P w =P e ·sinα (5)

[0048] exist Figure 4-1 In the middle, R u R is the force acting parallel to the direction of the plowshare. wz The horizontal and vertical resistance R experienced by the plowshare section w and R z The combined force fR wz Let P be the frictional force when the bottom of the plowshare contacts the soil, and its direction is opposite to the direction of the plowshare's movement. u The force exerted by the plowshare on the plowshare is parallel to the direction of the plowshare blade, and its direction is the same as the positive direction of the u-axis, that is:

[0049] P u =P e ·cosα (6)

[0050] From the static equilibrium relationship, we can obtain:

[0051]

[0052] In the field experiment, 1LYF-450 type hydraulic turnover plow of Hebei Shuangfeng Agricultural Machinery Manufacturing Co., Ltd. (executive standard: GB / T14225-2008 "share plow") was selected. The working width of single plow share of the hydraulic turnover plow was 50 cm, that is, standard 50 type plow share, the matched power was 102.9-129.5 kw, the whole machine weight was 1650 kg, and the plowing depth was 22-27 cm. Assuming that the plow share made uniform linear motion at 15 km / h during work, the tractor power was 115 kw, and through calculation, the tractor traction force P e exerted on the plow share was about 27600 N. The standard 50 type plow share weighed about 5615.06 g. The force conditions of the standard 50 type plow share were calculated as follows: the soil resistance coefficient Kt under unit area perpendicular to the plow share advancing direction was 0.45 Kg·cm -2 , the gravity acceleration g was 9.80 m / s 2 , the friction coefficient f of soil and share surface material contact was 0.31, the maximum depth a was 27 cm, the plow body working width b was 50 cm, the share surface angle ε was 39.8°, the soil pushing angle α was 45°, the blade angle δ was 25°, P e was 27600 N, P z =71.02 N, R z =2977.71 N, R w =12327.66 N, R wz =12682.19 N, P nr =K t abgsinαsin(ε+δ)=3809.10N。

[0053] Wear is not a property inherent to materials, it is influenced by a variety of different factors in the friction system, although a connection between wear and material properties can be observed, this connection can be irregular, and the relationship between wear resistance and hardness is not completely linear. The wear amount of abrasive wear can be expressed by the following formula:

[0054]

[0055] In the formula: W-wear amount; K a -abrasive wear coefficient; N-total normal load; H-hardness of the material.

[0056] Through the abrasive wear amount formula, a simple ratio of the upper and lower layer wear amounts is made.

[0057]

[0058] N 下 =12682.19 N, N 上 =3809.10 N, H 上H 下 = 1:1, it can be deduced that the general trapezoidal plough share (referring to the standard 50 type plough share) W 下 : W 上 about 3.329:1. That is, by calculating the ratio of the wear amount of the lower working surface to the wear amount of the upper working surface of the plough share blade under the force, the result is basically consistent with the wear principle obtained by Zhao Genong in the analysis of the formation process of the standard plough share blade wear stabilization section shape (as shown in Figure 4-3 , when the plough blade is completely worn out, the thickness ratio of the upper and lower layers of the back edge is about 1:3, and is independent of the original section shape and thickness), so controlling the ratio of the wear amount of the wear-resistant coating to the wear amount of the matrix to about 1:3 can keep the plough share blade angle within a good range to achieve better self-grinding effect.

[0059] The self-grinding blade plough share of the embodiment can grind out a sawtooth-shaped blade edge similar to shark teeth during operation, and can repeatedly grind out a sawtooth-shaped blade edge to simulate the characteristics of shark teeth damage replacement. For the design of repeatedly stacked wear-resistant coatings and blank matrix, on the one hand, it is to save preparation cost, and on the other hand, it is to limit the development of the back edge. After the first wear-resistant coating is completely consumed, the blank matrix will experience a short period of rapid wear, and the second wear-resistant coating will make it form conditions to inhibit the development of the back edge again. At the same time, from a macroscopic point of view, the sharpness of the shark teeth triangle is 20°-60°, and the shark teeth within this range have good ability to tear prey. Teeth with small sharpness have strong puncture ability, and teeth with large sharpness can well tear and cut objects. However, too small sharpness will make the teeth not very stable, and easy to fall off or break. Through the comprehensive analysis and consideration of the macroscopic and microscopic structure of shark teeth, the sawtooth angle is not easy to be too large or too small when it is applied in the coating structure design through bionic technology. Too large will lead to the sawtooth-shaped blade of the plough share not sharp enough, and the drag reduction performance cannot be well played when cutting soil, and too small will make the sawtooth-shaped blade easy to break down during plowing, reducing the working performance. Therefore, the angle of the sawtooth tip is selected to be 45°, which can also be adjusted according to the working conditions.

[0060] (II) Field experiment

[0061] After 900 mu field experiment under extreme soil conditions, the data of the first 300 mu ordinary share wear and wear-resistant coated share in width are not obvious, the most serious wear is 4.44 mm, but the blade edge has a slight gap; the most serious wear of 600 mu is 6.34 mm, and the most serious wear of 900 mu is 14.02 mm due to the rapid development of back ridge, and the back ridge angle has obvious difference. Through the field experiment data, it can be directly seen that the wear-resistant coating prepared on the lower working surface of the share blade can effectively inhibit the development of back ridge, and the minimum wear of the test piece is not the lowest wear of the wear-resistant coating, which also verifies that the upper and lower layer wear amount needs to reach a certain proportion to better inhibit the back ridge.

[0062] Embodiment 2

[0063] In this embodiment, according to the different sizes of trapezoidal share, the coverage range of bionic coating structure on the lower working surface of the blade edge can be adjusted accordingly. For example, three or more repeated stacked WC-MoS2 wear-resistant coatings 2 are fused on the lower working surface of the blade edge of the share body 1.

[0064] Embodiment 3

[0065] In this embodiment, under the condition that the ratio of wear-resistant coating 2 wear amount to share body 1 wear amount is within a certain range (about 1:3) to achieve good self-sharpening, and the wear-resistant coating 2 is sawtooth-shaped to obtain the corresponding bionic structure of the blade edge, the materials of each layer of wear-resistant coating 2 of the bionic coating structure are not limited to WC-MoS2. For example, WC-Co, WC-Fe, TiN-MoS2 and other common coating materials in wear-resistant coating preparation can be used to replace WC-MoS2.

[0066] Embodiment 4

[0067] In this embodiment, according to the characteristics of trapezoidal share repeatedly forming sharp blade edge in work, bionic coating structure is also adapted to other types of shares (such as chisel-shaped share, triangular share) that contact deep plowing soil.

[0068] In summary, the present application refers to the characteristics of shark teeth self-grinding and tearing objects, and designs the coating structure as a stacked sawtooth-shaped gradient wear-resistant coating, which can limit the wear of the share on one hand, form a self-sharpening share, and reduce the resistance when plowing on the other hand, and improve the plowing performance; due to the complex soil environment, the share is greatly affected by external factors during work, although the application of sawtooth-shaped gradient structure to the blade part of the share cannot eliminate the generation of back ridge, and the wear will still increase with the development of back ridge, compared with ordinary shares, the sawtooth-shaped gradient structure can not only inhibit the development of back ridge, effectively prolong the service life of the share, but also significantly reduce energy consumption and improve efficiency during share work by improving plowing performance.

Claims

1. A self-sharpening share characterized by: The self-wearing blade share comprises a share body (1) and a bionic coating structure, the bionic coating structure comprises one or more than one wear-resistant coating (2) arranged on the lower working surface of the cutting edge of the share body (1), the side edge of the wear-resistant coating (2) is sawtooth-shaped, and the sawtooth tips of the side edge are directed towards the cutting edge of the share body (1). The wear-resistant coating (2) is multilayer, and the arrangement of the multilayer wear-resistant coating in the thickness direction of the wear-resistant coating (2) is stacking. In the multilayer wear-resistant coating, the sawtooth-shaped edge of the wear-resistant coating (2) in the upper layer is staggered with the sawtooth-shaped edge of the wear-resistant coating (2) in the lower layer in the arrangement mode of being spaced apart at a certain distance in the direction away from the cutting edge of the share body (1). The bionic coating structure specifically comprises a plurality of wear-resistant coatings (2) spaced apart from each other, and the sawtooth-shaped edge of the wear-resistant coating (2) in the first layer is flush with the cutting edge of the share body (1). The ratio of the wear amount of the share body (1) to the wear amount of the bionic coating structure is 2.9-3.4:

1.

2. A self-sharpening share as claimed in claim 1, wherein: The angle of the sawtooth tip is 30-60°.

3. The self-sharpening share of claim 1, wherein: The share body (1) is a trapezoidal share, a chisel-shaped share or a triangular share without coating on the surface.

4. A hydraulic turnover plow using the self-wearing blade share according to any one of claims 1-3.

5. A cultivator characterised in that: The hydraulic turnover plow uses the self-wearing blade share according to any one of claims 1-3.

6. A method for designing a self-sharpening coating biomimetic structure, characterized in that: The method comprises the following steps: Taking the sawtooth distribution and gradient structure of shark teeth as a prototype, a wear-resistant coating with a sawtooth-shaped side edge is used to construct a bionic coating structure on a base layer by layer to form the self-wearing blade share according to any one of claims 1-3 by controlling the wear amount. The self-wearing blade share comprises a share body (1) and a bionic coating structure, the bionic coating structure comprises one or more than one wear-resistant coating (2) arranged on the lower working surface of the cutting edge of the share body (1), the side edge of the wear-resistant coating (2) is sawtooth-shaped, and the sawtooth tips of the side edge are directed towards the cutting edge of the share body (1). The wear-resistant coating (2) is multilayer, and the arrangement of the multilayer wear-resistant coating in the thickness direction of the wear-resistant coating (2) is stacking. In the multilayer wear-resistant coating, the sawtooth-shaped edge of the wear-resistant coating (2) in the upper layer is staggered with the sawtooth-shaped edge of the wear-resistant coating (2) in the lower layer in the arrangement mode of being spaced apart at a certain distance in the direction away from the cutting edge of the share body (1). The bionic coating structure specifically comprises a plurality of wear-resistant coatings (2) spaced apart from each other, and the sawtooth-shaped edge of the wear-resistant coating (2) in the first layer is flush with the cutting edge of the share body (1). The ratio of the wear amount of the share body (1) to the wear amount of the bionic coating structure is 2.9-3.4:

1. The angle of the sawtooth tip is 30-60°. The share body (1) is a trapezoidal share, a chisel-shaped share or a triangular share without coating on the surface.

4. A hydraulic turnover plow using the self-wearing blade share according to any one of claims 1-3. The hydraulic turnover plow uses the self-wearing blade share according to any one of claims 1-3. The method comprises the following steps: Taking the sawtooth distribution and gradient structure of shark teeth as a prototype, a wear-resistant coating with a sawtooth-shaped side edge is used to construct a bionic coating structure on a base layer by layer to form the self-wearing blade share according to any one of claims 1-3 by controlling the wear amount.

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