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Plasma reinforcing method and device for inner surface of cylindrical metal

A technology of plasma and strengthening device, applied in the device for realizing the above method, in the field of plasma strengthening, can solve the problems of increasing production cost, waste of production resources, unfavorable mass production of products, etc., and achieves the effect of good versatility and saving production cost.

Inactive Publication Date: 2017-12-22
聂恒志
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, if the existing processing methods are used to process some large cylindrical parts, since the parts need to be placed in a vacuum chamber as a whole, the vacuum chamber required to deposit the ceramic reinforcement layer using plasma technology will be very large, for example, the bore diameter is larger than 500mm marine diesel cylinder liners, long-range artillery barrels, missile launchers, etc.
If these large cylindrical parts are still processed with the existing technology, a large vacuum chamber needs to be built, which will undoubtedly increase the cost and difficulty of processing, which is not conducive to the mass production of products
[0004] In addition, the existing processing method still has the following disadvantages when only the inner surface of the cylindrical part needs to be processed: the entire part is placed in the vacuum chamber, and the working gas diffuses in the entire vacuum chamber during processing; The inner and outer surfaces of the cylindrical parts will be in contact with the gas. Therefore, the ceramic reinforcement layer cannot be deposited only on the inner surface of the cylindrical parts, resulting in a waste of production resources and further increasing the production cost.

Method used

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  • Plasma reinforcing method and device for inner surface of cylindrical metal
  • Plasma reinforcing method and device for inner surface of cylindrical metal
  • Plasma reinforcing method and device for inner surface of cylindrical metal

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Embodiment 1

[0033] A plasma strengthening method for the inner surface of a cylindrical metal disclosed in the present invention is to seal the two ends of the cylindrical metal 6 with end caps 5, then vacuumize, and pass through the electrode rod 52 and the air inlet port arranged on the end cap 5. 54 and strengthen the inner wall of the cylindrical metal according to the method of plasma strengthening. The key of the present invention is to use the cylindrical metal 6 itself as a vacuum container, and it is easy to adapt to the strengthening treatment of the inner wall surface of cylindrical metal tube workpieces of different lengths without establishing a large vacuum, which solves the problems of large investment and narrow applicable surface of the traditional method , providing a new approach for the strengthening treatment of large cylindrical metal inner walls. It is especially suitable for the internal surface strengthening treatment of various large cylinder liners, gun barrels,...

Embodiment 2

[0041] like Figure 5 As shown, when the length of the cylindrical metal 6 is relatively short, only the positive electrode plate 51 and the electrode rod 52 provided on one of the end caps 5 can meet the processing requirements.

[0042] When the present invention is in use, at first, according to the length and the size of the cylindrical metal 6, select an end cap 5 of a suitable model, connect the end cap 5 to the positive pole of the power supply, connect the cylindrical metal to the negative pole of the power supply, and the end cap 5 is connected to the drive motor. 21 and the screw mandrel 22, cooperate with the guide rod 8, clamp the cylindrical metal 6 from both ends to form a sealed space, and extract the air left in the sealed space through the air outlet interface 55 to form a vacuum; then, through The air inlet port 54 is filled with working gas, and cooperates with the electrode rod 52 on the positive electrode plate 51 to deposit a ceramic layer on the inner su...

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Abstract

The invention discloses a plasma reinforcing method and device for the inner surface of cylindrical metal, and belongs to the technical field of metal surface treatment. The method comprises the steps that the two ends of the cylindrical metal are sealed with end covers, vacuumizing is conducted, and reinforcing treatment is conducted on the inner wall of the cylindrical metal through electrode bars and an air inlet connector which are arranged on the end covers according to a plasma reinforcing method. The device comprises racks and a guiding rod, two groups of moving mechanisms are oppositely arranged on the guiding rod, the lower end of each moving mechanism is connected with the corresponding end cover through a connecting portion, and the end covers are fixed to the two ends of the cylindrical metal in a sealing manner and connected with the air inlet connector, an air outlet connector and an air outlet pipe. According to the plasma reinforcing method and device, the structure is simple, manipulation is convenient, and ceramic layer deposition treatment can be conducted on the inner surface of the large cylindrical metal without building a large vacuum chamber.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a plasma strengthening method for the inner surface of a cylindrical metal, and also relates to a device for realizing the above method. Background technique [0002] In the prior art, for depositing a ceramic strengthening layer on the surface of a metal part, the whole metal part is generally placed in a vacuum chamber, and then a layer of ceramic strengthening layer of BN-SiN and other elements is deposited on the surface of the part by plasma technology. This technology can greatly improve the surface hardness, wear resistance and corrosion resistance of metals. [0003] However, if the existing processing methods are used to process some large cylindrical parts, since the parts need to be placed in a vacuum chamber as a whole, the vacuum chamber required to deposit the ceramic reinforcement layer using plasma technology will be very large, for example, the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/22C23C14/04
CPCC23C14/22C23C14/046
Inventor 聂恒志
Owner 聂恒志