CN211982470U

CN211982470U - High sharpness self-sharpening rotary blade

Info

Publication number: CN211982470U
Application number: CN201922450620.6U
Authority: CN
Inventors: 张雷; 黄国钦; 钟素娟; 宋晓国; 王裕昌; 纠永涛; 李宇佳; 李和鑫; 王博; 孟为民
Original assignee: Zhengzhou Research Institute of Mechanical Engineering Co Ltd; China Innovation Academy of Intelligent Equipment Co Ltd CIAIE
Current assignee: Zhengzhou Research Institute of Mechanical Engineering Co Ltd; China Innovation Academy of Intelligent Equipment Co Ltd CIAIE
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-24
Anticipated expiration: 2029-12-31
Also published as: DE202020101962U1

Abstract

The utility model provides a high sharpness self-sharpening rotary blade, including handle of a knife and blade, two sides of blade are back tangent plane and tangent plane respectively, the bottom of blade is provided with the cutting edge, the front end of blade is bent to a side arc that has the tangent plane, the cutting edge is an inclined cutting surface and is used for connecting back tangent plane and tangent plane, the contained angle between this cutting surface and the back tangent plane is 30 ~ 60, the utility model optimizes the shape of the cutter, improves the sharpness of the cutter; furthermore, the utility model discloses the back of the body tangent plane at the rotary blade is equipped with wear-resisting diamond borer coating for the part of blade face to make the different wearing and tearing ratio of having between back of the body tangent plane and the blade face, in the use, make the cutter have certain self-sharpening nature, in rotary blade working process promptly, along with operating time's extension, the high wear-resisting of back of the body tangent plane and the low wear-resisting dynamic balance of blade face, make the cutter both have certain wearability, can continuously keep certain sharpness again, can obviously reduce the oil consumption of rotary cultivator.

Description

High sharpness self-sharpening rotary blade

Technical Field

The utility model relates to a rotary blade, concretely relates to high sharpness is from sharp rotary blade.

Background

The rotary tillage cutter is a main core component of the rotary cultivator and also is a main consumable, and the annual consumption is huge. Abrasion is a main failure mode of the rotary tillage cutter, and the service life of the rotary tillage cutter can be effectively prolonged by improving the abrasion resistance of the rotary tillage cutter, so that the rotary tillage operation quality is improved, the operation downtime is reduced, and the rotary tillage cutter is helpful for avoiding farmers from missing farming opportunities and influencing the yield.

The wear resistance of the cutter can be obviously improved by coating diamond on the edge part of the rotary tillage cutter, but the good use effect can not be obtained by simply coating diamond on the edge part of the rotary tillage cutter, on one hand, the friction coefficients of two surfaces are approximate to each other after the diamond is coated on two surfaces of the edge part, the cutter is easy to wear unevenly in the use process, and meanwhile, the cutter is difficult to self-sharpen, so that the operation resistance is increased, and the oil consumption is increased; on the other hand, the increase of the operation resistance can also increase the loss of the diamond coating caused by soil, and simultaneously, the cutter body can be broken and is difficult to continue to serve. Therefore, it is necessary to provide a diamond-coated rotary blade with high self-sharpening and wear resistance, which can reduce the working resistance and prolong the service life of the blade.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high sharpness is from sharp rotary blade to improve the current rotary blade that has diamond borer coating from the poor and low problem of cutter sharpness of sharpness.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a high-sharpness self-sharpening rotary blade comprises a blade handle and a blade body, wherein two side faces of the blade body are a back tangent plane and a normal tangent plane respectively, a cutting edge is arranged at the bottom of the blade body, the front end of the blade body is bent towards one side of the blade body with the normal tangent plane in an arc shape, the cutting edge is an inclined cutting edge face and is used for connecting the back tangent plane and the normal tangent plane, and an included angle between the cutting edge face and the back tangent plane is 30-60 degrees.

Further, the portion of the back facet opposite to the facet is provided with a diamond braze coating.

Further, the thickness of the diamond brazing coating is 0.3-0.8 mm.

Further, the surface roughness of the rotary blade is not more than 1.6 Ra, and the surface roughness of the diamond brazing coating is not more than 6.3 Ra.

Furthermore, the connection part of the blade face and the tangent plane is in arc transition.

Furthermore, the width of the edge surface is 5 mm-15 mm.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model optimizes the shape of the cutter, forms a certain included angle between the cutting surface and the back cutting surface of the rotary blade, improves the sharpness of the cutter, reduces the resistance between the rotary blade and the cultivated land, and reduces the frequency of changing the rotary blade;

2. the utility model discloses the back of the body tangent plane at the rotary blade is equipped with wear-resisting diamond borer coating for the part of blade face to make and have different wearing and tearing between back of the body tangent plane and the blade face and compare, in the use, make the cutter have certain self-sharpening nature, in rotary blade working process promptly, along with operating time's extension, the high wear-resisting of back of the body tangent plane and the low wear-resisting dynamic balance that is in of blade face make the cutter both have certain wearability, can continuously keep certain sharpness again, can obviously reduce the oil consumption of rotary cultivator.

Drawings

FIG. 1 is a schematic view of a high sharpness self-sharpening rotary blade;

FIG. 2 is a cross-sectional view of FIG. 1;

the labels in the figure are: 1. a normal section, 2 a back section, 3 a blade, 4 a diamond braze coating, 5 a blade surface.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the following will combine the drawings in the present invention to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments, based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention.

A high-sharpness self-sharpening rotary blade comprises a blade handle and a blade body, wherein two side faces of the blade body are a back tangent plane 2 and a front tangent plane 1 respectively, a cutting edge 3 is arranged at the bottom of the blade body, the front end of the blade body is bent towards one side with the front tangent plane in an arc manner, as shown in figure 2, the cutting edge 3 is an inclined cutting face 5 and is used for connecting the back tangent plane 2 and the front tangent plane 1, the width of the cutting face 5 is 5 mm-15 mm, the back tangent plane 2, the front tangent plane 1, the cutting face 5 and the top of the blade body jointly form a straight-angle trapezoidal structure, and an included angle between the cutting face 5 and the back tangent plane 2 is 30-60 degrees. The part of the back tangent plane 2 opposite to the blade surface 5 is provided with a diamond brazing coating 4, wherein the part opposite to the blade surface 5 only refers to the projection part of the blade surface 5 on the back tangent plane 4, and the thickness of the diamond brazing coating 4 is 0.3-0.8 mm.

Further optimizing the scheme, in order to enable the back cut surface 2 and the blade surface 5 to have different abrasion ratios, the surface roughness of the rotary blade is not more than 1.6 Ra, and the surface roughness of the diamond drill coating 4 is not more than 6.3 Ra.

Further optimizing the scheme, in order to reduce the resistance between the rotary tillage blades and the cultivated land, the connection part of the blade surface 5 and the tangent plane 1 is in arc transition.

The blade face 5 of the rotary blade of the utility model is at a certain angle with the back tangent plane 2 to form a blade edge with a certain sharpness. When the rotary blade works, the normal section 1 has no wear-resistant coating, and the wear resistance is poor; the back section 2 is provided with a diamond wear-resistant layer with better wear resistance, and the diamond wear-resistant layer and the back section form a certain wear difference, so that the cutter has certain self-sharpening property. When the abrasion passivation degree of the cutting edge 3 and the self-sharpening degree of the cutter reach dynamic balance, the cutter continuously keeps certain sharpness, and the working efficiency of cutting into the sand is improved.

Example 1

In this embodiment, the width of the rotary blade edge surface 5 is 15 mm. The blade face 5 and the back tangent plane 2 form an included angle of 30 degrees. And a diamond brazing coating 4 with the thickness of 0.3mm is arranged on the back tangent plane 2 opposite to the blade surface 5.

Example 2

In this embodiment, the width of the rotary blade edge surface 5 is 13 mm. The edge face 5 and the back tangent plane 2 form an included angle of 35 degrees. And a diamond brazing coating 4 with the thickness of 0.4mm is arranged on the back tangent plane 2 opposite to the blade surface 5.

Example 3

In this embodiment, the width of the rotary blade edge surface 5 is 11 mm. The edge surface 8 and the back tangent plane 2 form an included angle of 40 degrees. And a diamond brazing coating 4 with the thickness of 0.5mm is arranged on the back tangent plane 2 at the position opposite to the blade surface 5.

Example 4

In this embodiment, the width of the rotary blade edge surface 5 is 9 mm. The edge face 5 and the back tangent plane 2 form an included angle of 45 degrees. And a diamond brazing coating 4 with the thickness of 0.6mm is arranged on the back tangent plane and at the position opposite to the blade surface.

Example 5

In this embodiment, the width of the rotary blade edge surface 5 is 7 mm. The blade face 5 and the back tangent plane 2 form an included angle of 50 degrees. And a diamond brazing coating 4 with the thickness of 0.7mm is arranged on the back tangent plane and at the position opposite to the blade surface.

Example 6

In this embodiment, the width of the rotary blade edge surface 5 is 7 mm. The blade face 5 and the back tangent plane 2 form an included angle of 60 degrees. And a diamond brazing coating 4 with the thickness of 0.8mm is arranged on the back tangent plane and at the position opposite to the blade surface.

Comparative example 1

The rotary blade of the present invention has the same material and different shape as the rotary blade of the present invention. The included angle between the blade surface and the back tangent plane of the rotary tillage blade is 0, the width of the blade surface is 15mm, and the back tangent plane is provided with a diamond drill coating with the thickness of 0.8 mm.

Comparative example 2

In the comparative example, the rotary blade is the same as the rotary blade of the invention in material, the width of the blade face is 15mm, the included angle between the blade face and the back cut face is 30 degrees, and only the back cut face has no diamond coating.

Comparative example 3

The rotary blade of the comparative example is the same as the rotary blade of the invention in material, the width of the blade face is 15mm, the included angle between the blade face and the back cut face is 30 degrees, and the back cut face and the blade face are only provided with a diamond drill coating with the thickness of 0.8 mm.

In order to verify the innovativeness of the rotary tillage cutter, the rotary tillage cutters of examples 1-6 and comparative examples 1-3 were respectively mounted on a rotary cultivator driven by a 100 horsepower tractor, and rotary tillage operation was performed under the same geological conditions, so as to judge the sharpness of the cutter by the actual oil consumption of 100 mu of land by rotary tillage.

As can be seen from table 1 above, examples 1 to 6 of the present invention have less actual oil consumption and better sharpness than comparative examples 1 to 3.

Meanwhile, in the embodiments 1 to 6, the oil consumption is gradually increased along with the gradual decrease of the width of the rotary blade cutting surface 5 and the gradual increase of the included angle between the cutting surface 5 and the back tangent plane 2, so that the smaller the width of the rotary blade cutting surface 5 is, the larger the oil consumption is within the range defined by the utility model; the greater the angle between the cutting edge face 5 and the back-cut face 2, the greater the oil consumption, with example 1 having the least oil consumption and the best sharpness.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a high sharpness is from sharp rotary blade, includes handle of a knife and blade, two sides of blade are back of the body tangent plane (2) and tangent plane (1) respectively, and the bottom of blade is provided with cutting edge (3), and the front end of blade is to a side arc bending who has tangent plane (1), its characterized in that: the cutting edge (3) is an inclined cutting surface (5) and is used for connecting the back tangent plane (2) and the normal tangent plane (1), and the included angle between the cutting surface (5) and the back tangent plane (2) is 30-60 degrees.

2. The high sharpness self-sharpening rotary blade of claim 1, wherein: the part of the back tangent plane (2) opposite to the blade surface (5) is provided with a diamond brazing coating (4).

3. A high sharpness self-sharpening rotary blade according to claim 2, wherein: the thickness of the diamond brazing coating (4) is 0.3-0.8 mm.

4. A high sharpness self-sharpening rotary blade according to claim 3, wherein: the surface roughness of the rotary blade is not more than 1.6 Ra, and the surface roughness of the diamond brazing coating (4) is not more than 6.3 Ra.

5. The high sharpness self-sharpening rotary blade of claim 1, wherein: the connection part of the blade surface (5) and the tangent plane (1) is in arc transition.

6. A high sharpness self-sharpening rotary blade according to any one of claims 1 to 5, wherein: the width of the blade face (5) is 5-15 mm.