CN218912892U - Cutting knife with wear-resistant nano ceramic coating - Google Patents
Cutting knife with wear-resistant nano ceramic coating Download PDFInfo
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- CN218912892U CN218912892U CN202223203518.4U CN202223203518U CN218912892U CN 218912892 U CN218912892 U CN 218912892U CN 202223203518 U CN202223203518 U CN 202223203518U CN 218912892 U CN218912892 U CN 218912892U
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Abstract
The utility model discloses a cutting blade with a wear-resistant nano ceramic coating, which comprises a cutter head and a mounting handle. The tool bit is provided with a tool bit body and a tool bit part. The tool bit body, its one side is equipped with wear-resisting convex part, tool bit body and installation handle are connected, and wear-resisting convex part is blade portion, and its two cutting faces all are equipped with nanometer protective coating, nanometer protective coating is cermet combined material preparation. The cutting blade with the wear-resistant nano ceramic coating has the advantages that in tunnel construction under various geological conditions such as sandstone clay, the wear resistance and damage resistance of the cutting blade are greatly improved, the service life of the cutting blade is prolonged, the tunneling quantity of the cutting blade can be improved to more than 3000 meters, the engineering progress is greatly improved, the property loss is reduced, and the frequency of replacing the cutting blade is reduced.
Description
Technical Field
The utility model belongs to the technical field of shield tunneling machine accessories, and particularly relates to a cutting knife with a wear-resistant nano ceramic coating.
Background
Along with the continuous development of road traffic construction in China, tunnels or subways play an important role in relieving traffic pressure, the application of shield tunneling machines is more and more widely in tunnel or subway construction at present, a shield hob is one of cutters of the shield tunneling machines, the cutter plays a role in advancing a front in construction, and the cutter plays a role in cutting rock and soil.
The cutting knife is affected by the soil condition and the random change of the underground water pressure, and continuously or variably extrudes, scrapes, impacts and wears along with the continuous promotion of construction and the continuous rotation of the cutterhead. The abrasion of the cutting knife is not limited to the knife tooth part, crack and damage are easy to occur on the side face of the knife head body under the collision of the stone blocks generated in construction, the abrasion of the hob is increased, the knife needs to be frequently replaced, and the tunneling efficiency of the shield tunneling machine is difficult to improve.
Disclosure of Invention
In view of the above problems, and in particular in view of the geological conditions of TBM hard rock, the present utility model provides a cutting insert with a wear resistant nanoceramic coating comprising an insert head and a mounting shank
The tool bit has
One side of the cutter head body is provided with a wear-resistant convex part, one section of the cutter head body is connected with the mounting handle, the other end of the cutter head body is provided with a cutter point part,
the knife edge part is provided with a nano protective coating on both cutting surfaces, and the nano protective coating is prepared from a metal ceramic composite material.
In some embodiments, the nano-protective coating is prepared on the outer side of the blade by spraying.
In some modes, the outer side face of the wear-resistant convex part of the tool bit body is provided with a metal ceramic composite coating.
In some embodiments, the nanocoating has a thickness of 100-150um.
In some embodiments, the two cutting surfaces of the blade have a plurality of laterally disposed circular arc-shaped fins.
In some embodiments, the wear-resistant protrusion has a plurality of wear-resistant protrusions protruding from one face of the bit body.
In some aspects, the blade portion increases in width from end to tail.
The beneficial effects of the utility model are as follows:
1. the cutter with the nano coating greatly prolongs the service life, and the tunneling quantity can reach more than 3000 meters;
2. the cutting knife with the nano coating operates under geological conditions such as various sandstone clay, so that the wear resistance and the damage resistance of the cutting knife are greatly improved, the loss is reduced, and the frequency of replacing the cutting knife is reduced;
3. the prismatic structure at the front of the cutter head improves the extrusion resistance of the cutter head.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
fig. 2 is a schematic side view of another cutting blade.
In the figure:
10 tool bit, 11 blade portions, 111 nanometer ceramic coating, 12 tool bit body, 121 abrasion-resistant nanometer coating, 20 installation handle.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
A cutting insert having a wear-resistant nanoceramic coating, as shown in fig. 1, 2, comprising a cutting head 10 and a mounting shank 20;
the tool bit 10 has
A cutter head body 12, one surface of which is provided with a wear-resistant convex part, one section of the cutter head body 12 is connected with a mounting handle 20, the other end is provided with a cutter point part 11,
the blade part 11 is coated and provided with a nano ceramic coating 111 on both cutting surfaces, and the nano ceramic coating 111 is a metal ceramic composite coating. The nano-protective coating 111 is a cermet composite coating.
So can reduce the collision damage of rubble piece to the tool bit, the blade portion 11 that is equipped with nanometer protective coating 111 is difficult to appear cracking or breach, is favorable to keeping the integrality of cutting sword structure, ensures that the inside atress of cutting sword is even.
When the cutter is used, the cutter is mounted on the shield tunneling machine through the cutter handle 20, then the wear-resistant convex part of the cutter head body 12 is abutted with the front Fang Yanbi in the using process, and then the cutter blade 11 is used for cutting.
The nano protective coating is prepared on the outer side surface of the blade part 11 in a spraying mode. In some aspects, the wear resistant nanocoating has a thickness of 100-150um.
The outer side surface of the wear-resistant convex part of the tool bit body 12 is provided with a wear-resistant nano coating 121, and the wear-resistant nano coating 121 is a metal ceramic material coating. The wear resistance and damage resistance of the wear-resistant convex part can be greatly improved, the wear consumption is reduced, and the frequency of replacing the cutter is reduced, so that the downtime and cutter replacing time of the shield machine is shortened, and the tunneling efficiency of the whole shield machine is finally improved.
The binding force of the metal ceramic composite coating is 80-120MPa, the microhardness HV900-1100 is higher than 99%, and the nano protective coating has good toughness.
As shown in fig. 2, the two cutting surfaces of the blade 11 have a plurality of circular arc-shaped ribs arranged in the transverse direction. The width of the blade part 11 gradually increases from the end part to the tail part, so that the interface of the whole tool bit part forms a conical-like structure, the strength of the tool bit is improved to a certain extent, and the tool bit is not easy to deform.
In some aspects, the wear-resistant protrusion has wear-resistant protrusions protruding from one side of the bit body 12. The protruding outer side face is of a cambered surface structure.
Concave parts are arranged between any two wear-resistant convex parts to form a concave-convex staggered structure, so that the protruding part of the whole product is an arch column with an arc-shaped interface, and deformation is not easy to occur.
The nano-protective coating 111 is a metal ceramic composite coating with a thickness of 100-150 μm. Generally, the nano coating is not too thick, and in general, the wear resistance of the coating is provided by the properties of the nano material, and the nano protective coating 111 is accompanied by shrinkage process during cooling solidification, and tensile stress is generated in the particles when molten drops strike the substrate and cool and solidify rapidly, the size of the tensile stress is proportional to the thickness of the coating, and when the thickness of the coating reaches a certain degree, the tensile stress in the coating exceeds the bonding strength of the coating and the substrate or the bonding strength of the coating, and the coating is damaged. At this thickness, the nano-protective coating 111 provides the surface of the cutting insert with a good impact resistance.
It will be apparent to those skilled in the art that various modifications to the above embodiments may be made without departing from the general spirit and concepts of the utility model. Which fall within the scope of the present utility model. The protection scheme of the utility model is subject to the appended claims.
Claims (8)
1. A cutting insert with a wear-resistant nano-ceramic coating, characterized by comprising a cutting head (10) and a mounting shank (20);
the tool bit (10) has
A cutter head body (12) with one surface provided with a wear-resistant convex part, one section of the cutter head body (12) is connected with a mounting handle (20), the other end is provided with a cutter point part (11),
the knife edge part (11) is provided with a nano protective coating (111) in a coating mode on two cutting surfaces, and the nano protective coating (111) is a metal ceramic composite coating.
2. The cutting blade with the wear-resistant nano ceramic coating according to claim 1, wherein the nano protective coating is prepared on the outer side surface of the blade part (11) by spraying.
3. The cutting insert with the wear-resistant nano ceramic coating according to claim 1, wherein the wear-resistant nano coating (121) is provided on the outer side surface of the wear-resistant convex portion of the insert body (12).
4. A cutting insert with a wear-resistant nano-ceramic coating according to claim 3, characterized in that the wear-resistant nano-coating (121) is made of a cermet material.
5. The cutting blade with wear-resistant nano-ceramic coating according to claim 1, wherein the nano-protective coating (111) has a thickness of 100-150um.
6. A cutting blade with a wear-resistant nano-ceramic coating according to claim 1, characterized in that both cutting faces of the blade portion (11) have several transversely arranged circular arc-shaped ribs.
7. The cutting insert with wear-resistant nano-ceramic coating according to claim 1, wherein the wear-resistant protrusion has a plurality of wear-resistant protrusions protruding from one side of the insert body (12).
8. The cutting blade with wear-resistant nano-ceramic coating according to claim 7, wherein the blade portion (11) increases in width gradually from end to tail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223203518.4U CN218912892U (en) | 2022-11-30 | 2022-11-30 | Cutting knife with wear-resistant nano ceramic coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223203518.4U CN218912892U (en) | 2022-11-30 | 2022-11-30 | Cutting knife with wear-resistant nano ceramic coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218912892U true CN218912892U (en) | 2023-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223203518.4U Active CN218912892U (en) | 2022-11-30 | 2022-11-30 | Cutting knife with wear-resistant nano ceramic coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218912892U (en) |
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2022
- 2022-11-30 CN CN202223203518.4U patent/CN218912892U/en active Active
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