阅读说明：本技术 一种镶嵌了仿贝壳珍珠层“砖-桥-泥”仿生结构的高速犁犁铧 (High-speed plough share embedded with bionic structure of 'brick-bridge-mud' of shell pearl layer ) 是由 仲高艳 杨守峰 卞玉超 于 2020-04-28 设计创作，主要内容包括：本发明公开了一种镶嵌了仿贝壳珍珠层“砖-桥-泥”仿生结构的高速犁犁铧,用于延长高速犁犁铧耕作寿命,其特征在于：所述的高速犁犁铧易损部位镶嵌了仿贝壳珍珠层“砖-桥-泥”仿生结构,包括以下步骤：(1)确定高速犁犁铧易损部位,(2)仿贝壳珍珠层结构设计及制备,(3)镶嵌仿贝壳珍珠层“砖-桥-泥”仿生结构至犁铧本体。本发明的一种镶嵌了仿贝壳珍珠层“砖-桥-泥”仿生结构的高速犁犁铧,解决了高速犁犁铧耕作部位由于传统技术制造的均质材料强度和韧性不能同时提高,抗冲击性能低,易磨损的问题,提升了犁铧耕作部位的机械性能,使犁铧耕作部位机械性能适应高速整地作业需求,延长了犁铧耕作寿命。(The invention discloses a high-speed plough share embedded with a bionic structure of 'brick-bridge-mud' of a shell-like pearl layer, which is used for prolonging the cultivation life of the high-speed plough share and is characterized in that: the quick plough share is embedded with a bionic structure of 'brick-bridge-mud' imitating a shell pearl layer, and comprises the following steps: (1) determining a vulnerable part of the high-speed plough share, (2) designing and preparing a shell-like pearl layer structure, and (3) inlaying a shell-like pearl layer 'brick-bridge-mud' bionic structure to the plough share body. The high-speed plough share embedded with the bionic structure of 'brick-bridge-mud' imitating shell pearl layers solves the problems that the strength and the toughness of a homogeneous material manufactured by the traditional technology at the ploughing part of the high-speed plough share cannot be simultaneously improved, the shock resistance is low, and the high-speed plough share is easy to wear, improves the mechanical performance of the ploughshare ploughing part, enables the mechanical performance of the ploughshare ploughing part to adapt to the requirement of high-speed soil preparation operation, and prolongs the ploughshare ploughing service life.)

1. A high-speed plough share embedded with a bionic structure of 'brick-bridge-mud' of a shell pearl layer is used for prolonging the cultivation life of the high-speed plough share and is characterized in that: the quick plough share is embedded with a bionic structure of 'brick-bridge-mud' imitating a shell pearl layer, and comprises the following steps:

(1) determining the vulnerable part of the share of the high-speed plough

S1: measuring the appearance structure characteristic parameters of the high-speed plough share, including data such as length, width, thickness, surface curvature radius, angle and the like;

s2: constructing a three-dimensional solid model of the high-speed plough share by adopting a part characteristic-based solid modeling method;

s3: according to the interaction loading condition between the plough share and the soil, calculating the mechanical stress and strain of the plough share under the maximum working condition by adopting a finite element analysis method, and determining the vulnerable part of the high-speed plough share according to the distribution position of the maximum stress and strain;

(2) design and preparation of shell-like pearl layer structure

S4: according to the structural characteristics of the vulnerable part of the high-speed plough share, a modeling software is used for designing a shell pearl layer imitated 'brick-bridge-mud' bionic structural model of the vulnerable part of the plough share;

s5: converting a designed bionic structure model of the shell pearl layer brick-bridge-mud at the vulnerable part of the plough share into an STL file, melting a platform with a multi-material complex structure by adopting a laser powder bed, and preparing the bionic structure of the shell pearl layer brick-bridge-mud at the vulnerable part of the plough share according to the imported STL file;

(3) inlaying the bionic structure of 'brick-bridge-mud' of shell pearl layer to the ploughshare body

S6: removing the vulnerable part of the high-speed plough share, and embedding the prepared bionic structure of 'brick-bridge-mud' of the shell pearl layer into the plough share body.

Technical Field

The invention relates to a high-speed plough share, in particular to a high-speed plough share embedded with a bionic structure of 'brick-bridge-mud' of a shell pearl layer, and belongs to the technical field of agricultural equipment.

Background

The main functions of the plough are turning and breaking soil, the horizontal swinging type reversible plough (a swinging type plough for short) is a novel high-speed furrow plough tillage tool, a shuttle type operation mode is adopted, high-speed soil preparation operation can be continuously and alternately carried out, the working environment is poor, the horizontal swinging type reversible plough is often contacted with soil, gravel, crop straws, root blocks and the like and is often under the effects of friction, soil upturned soil deformation force and severe chiseling resistance, the interaction between the soil and the tool under the high-speed tillage condition causes serious abrasion of the tillage part of the plough share, and the phenomena of surface layer peeling, thermal cracking, plough damage and the like occur, so the working efficiency of the plough share is greatly reduced, and the plough share is scrapped in advance. Wherein, the main function of the share tip area of the ploughshare is soil penetration and soil cutting, which are the most critical cultivation parts, and researches show that the wear of the share tip area of the ploughshare is the most serious.

The pendulum plow is a typical agricultural machine, and the engineering structure material of the key parts of the pendulum plow is usually expected to be strong and tough, but unfortunately, the traditional engineering structure material is often subject to the balance between strength and toughness under the limitation of the traditional design, manufacturing and other methods. The fundamental reason of the vulnerability of the high-speed plough share is that the improvement of the working speed of the plough is not matched with the mechanical property of the homogeneous material manufactured by the traditional technology at the cultivating part, the mechanical property of the homogeneous material manufactured by the traditional technology at the cultivating part is not suitable for the requirement of high-speed soil preparation, and the contradiction between the improvement of the working speed of the plough and the bottleneck of the improvement of the mechanical property of the homogeneous material hinders the normal exertion of the use property of the high-speed plough share.

A large number of natural biological structures (such as bones, shell pearl layers, teeth and the like) existing in the nature have almost perfect adaptation degree of the structures and the functions to the nature after long-term evolution, and are a model of high-performance structural materials, particularly the shell pearl layers are formed by mutually stacking a large number of crystalline aragonite layers (hard phases) and a small number of biopolymer layers (soft phases), form a complex hierarchical structure of 'brick-mud' or 'brick-bridge-mud' with soft and hard interweaving and high order, and show excellent mechanical properties such as high strength and high toughness. A large number of research results of domestic and foreign researchers show that the mechanical properties such as strength, toughness and the like of the shell-like pearl layer material are greatly improved, which means that the shell-like pearl layer structure has great advantages in improving the mechanical properties of the material. However, the pearl-like layer material has the characteristics of complex structure, heterogeneous material and the like, so that the pearl-like layer material cannot be prepared by the traditional manufacturing technology.

The point-by-point, line-by-line, face-by-face and domain-by-domain forming method of additive manufacturing provides a new opportunity for the manufacturing technology from the traditional macroscopic appearance manufacturing to the integrated manufacturing of the macro microstructure, in particular to an advanced manufacturing technology which has the integrated requirements of precise forming and high performance, the microstructure of a local area can be regulated and controlled by a certain process strategy and method to manufacture products with complex structures and specific properties, the laser powder bed can theoretically manufacture products with any complex structures based on the principle of incremental manufacturing, is particularly suitable for customized and personalized manufacture, and the prior literature shows that the platform for melting the multi-material complex structure by the laser powder bed can realize the preparation of the multi-material complex structure product, however, no solution is provided for solving the problem of serious abrasion of the plowshare cultivating part of the high-speed plough by using a laser powder bed to melt a platform with a multi-material complex structure. Most of the researches on the prior pearl-like layer are polymer or other non-metallic materials, and the researches on a small amount of metallic pearl-like layers can not form a bionic structure of brick-bridge-mud, so that the prior researches are not suitable for solving the problem that the plough share of the high-speed plough is easy to damage.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a high-speed plough share embedded with a bionic structure of 'brick-bridge-mud' imitating a shell pearl layer, and solves the problems that the intensity and the toughness of a homogeneous material manufactured by the traditional technology at the ploughing part of the high-speed plough share cannot be simultaneously improved, the shock resistance is low, and the high-speed plough share is easy to wear, and in order to achieve the purposes, the technical scheme provided by the invention is as follows:

a high-speed plough share embedded with a bionic structure of 'brick-bridge-mud' of a shell pearl layer is used for prolonging the cultivation life of the high-speed plough share and is characterized in that: the quick plough share is embedded with a bionic structure of 'brick-bridge-mud' imitating a shell pearl layer, and comprises the following steps:

(1) determining the vulnerable part of the share of the high-speed plough

S1: measuring the appearance structure characteristic parameters of the high-speed plough share, including data such as length, width, thickness, surface curvature radius, angle and the like;

s2: constructing a three-dimensional solid model of the high-speed plough share by adopting a part characteristic-based solid modeling method;

s3: according to the interaction loading condition between the plough share and the soil, calculating the mechanical stress and strain of the plough share under the maximum working condition by adopting a finite element analysis method, and determining the vulnerable part of the high-speed plough share according to the distribution position of the maximum stress and strain;

(2) design and preparation of shell-like pearl layer structure

S4: according to the structural characteristics of the vulnerable part of the high-speed plough share, a modeling software is used for designing a shell pearl layer imitated 'brick-bridge-mud' bionic structural model of the vulnerable part of the plough share;

s5: converting a designed bionic structure model of the shell pearl layer brick-bridge-mud at the vulnerable part of the plough share into an STL file, melting a platform with a multi-material complex structure by adopting a laser powder bed, and preparing the bionic structure of the shell pearl layer brick-bridge-mud at the vulnerable part of the plough share according to the imported STL file;

(3) inlaying the bionic structure of 'brick-bridge-mud' of shell pearl layer to the ploughshare body

S6: removing the vulnerable part of the high-speed plough share, and embedding the prepared bionic structure of 'brick-bridge-mud' of the shell pearl layer into the plough share body.

The invention has the beneficial effects that: the high-speed plough share embedded with the bionic structure of 'brick-bridge-mud' imitating shell pearl layers solves the problems that the strength and the toughness of a homogeneous material manufactured by the traditional technology at the ploughing part of the high-speed plough share cannot be simultaneously improved, the shock resistance is low, and the high-speed plough share is easy to wear, improves the mechanical performance of the ploughshare ploughing part, enables the mechanical performance of the ploughshare ploughing part to adapt to the requirement of high-speed soil preparation operation, and prolongs the ploughshare ploughing service life.

Drawings

FIG. 1 is a schematic view of the construction of a high-speed plough share of the present invention;

fig. 2 is a schematic diagram of a bionic structure of a shell pearl layer brick-bridge-mud in a share tip area of the plough share.

The part numbers in the drawings are as follows: a plough share 1, a share tip area 2 of the plough share, a 'brick' structure 3, a 'mud' structure 4 and a 'bridge' structure 5.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiment is only one embodiment of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention, and the present invention is further described below with reference to the accompanying drawings and embodiments:

as shown in figure 1, the high-speed plough share 1 embedded with a bionic structure of 'brick-bridge-mud' of a shell pearl-like layer is used for prolonging the cultivation life of the high-speed plough share and is characterized in that: the plowshare tip area 2 of the plowshare at the vulnerable part of the high-speed plough plowshare 1 is embedded with a bionic structure of 'brick-bridge-mud' imitating a shell pearl layer, and the bionic structure comprises the following steps:

(1) determining the vulnerable part of the high-speed plough share 1

S1: measuring the appearance structure characteristic parameters of the high-speed plough share 1, including data such as length, width, thickness, surface curvature radius, angle and the like;

s2: constructing a three-dimensional solid model of the high-speed plough share 1 by adopting a part characteristic-based solid modeling method;

s3: according to the interaction loading condition between the ploughshare and the soil, calculating the mechanical stress and the strain of the ploughshare 1 under the maximum working condition by adopting a finite element analysis method, and determining that the vulnerable part of the high-speed plough ploughshare 1 is a ploughshare tip area 2 of the ploughshare according to the distribution position of the maximum stress and the strain;

(2) design and preparation of shell-like pearl layer structure

S4: according to the structural characteristics of a share tip area 2 of a share at the vulnerable part of a high-speed plough share 1, a bionic structural model of a shell pearl layer brick-bridge-mud imitating shell pearl layer of the share tip area 2 of the share at the vulnerable part of the share 1 is designed by using modeling software;

s5: converting a designed shell pearl layer-imitated brick-bridge-mud bionic structure model of the share tip area 2 of the share vulnerable part of the share into an STL file, adopting a laser powder bed to melt a platform with a multi-material complex structure, and preparing a shell pearl layer-imitated brick-bridge-mud bionic structure of the share tip area 2 of the share vulnerable part of the share according to the introduced STL file;

(3) inlaying the bionic structure of 'brick-bridge-mud' of shell pearl layer to the ploughshare body

S6: removing the share tip region 2 homogeneous material structure of the original share at the vulnerable part of the high-speed plough share 1, and embedding the prepared bionic structure of 'brick-bridge-mud' of the shell pearl layer into the share body.

Figure 2 shows a schematic diagram of a bionic structure of a shell pearl layer brick-bridge-mud imitating shell pearl layer in a share tip area 2 of a plough share, which is prepared by adopting a platform of a laser powder bed melting multi-material complex structure, the brick structure 3 is used for bearing load, the mud structure 4 is used for transmitting load, and the bridge structure 5 of an interconnection network layout is used for influencing a toughening mechanism of a material, so that when a crack of the material has a fracture tendency, the crack is expanded and deflected or is split into a plurality of branches due to the existence of the bridge and the randomness of the appearance position, thereby increasing energy consumption, enabling the stress field and the strain field to be distributed more uniformly, enabling the bionic structure of the brick-bridge-mud to have higher toughness modulus, increasing the integral fracture toughness of the material, and simultaneously increasing the firmness of the structure for resisting damage. Research shows that the hardness of the bionic structure of the brick-bridge-mud is mainly derived from the material of the brick structure 3, but the hardness is 20-30 times of that of the base material of the independent brick structure, and reasonable components and structural design of the brick-bridge-mud material play a key role in improving the mechanical property of the material.

In the embodiment, the basic process of preparing the shell pearl layer-imitated brick-bridge-mud bionic structure in the share tip area 2 of the share by adopting a platform with a laser powder bed melting multi-material complex structure is as follows: firstly, establishing a pearl layer-imitated 'brick 3-bridge 5-mud 4' bionic structure by adopting modeling software, as shown in figure 2, converting the bionic structure into an STL file, and importing the STL file into an operating system of the laser powder bed melting multi-material complex structure platform; secondly, selecting two different types of metal powder with the mechanical strength difference of more than 3 times, storing the first type of metal powder in a lower powder feeding cylinder of the preparation platform, and storing the second type of metal powder in a storage cabin of an upper powder feeding system of the preparation platform; and finally, starting a laser powder bed melting multi-material complex structure platform operating system, preparing a shell pearl layer imitated 'brick-bridge-mud' bionic structure in a share tip area 2 of the finished plough share according to the STL file, and performing post-treatment for later use after the preparation is finished as shown in figure 2.

Other undescribed portions of the present invention are the same as the prior art.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.