Deep hole aluminum piece hard anodic oxidation method and deep hole aluminum piece prepared by deep hole aluminum piece hard anodic oxidation method

A hard anodizing, deep-hole aluminum technology, applied in anodizing, electrolytic coatings, surface reaction electrolytic coatings, etc., can solve the problems of easy breakdown and ablation of the oxide film layer, and achieve stable and controllable processing. , to solve the effect of temperature rise

Active Publication Date: 2017-09-29
CHINA HANGFA SOUTH IND CO LTD
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  • Abstract
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Problems solved by technology

[0009] The invention provides a method for hard anodizing of deep-hole aluminum parts and the deep-hole aluminum parts made thereof, in o

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  • Deep hole aluminum piece hard anodic oxidation method and deep hole aluminum piece prepared by deep hole aluminum piece hard anodic oxidation method
  • Deep hole aluminum piece hard anodic oxidation method and deep hole aluminum piece prepared by deep hole aluminum piece hard anodic oxidation method
  • Deep hole aluminum piece hard anodic oxidation method and deep hole aluminum piece prepared by deep hole aluminum piece hard anodic oxidation method

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[0047] Example 1

[0048] A preferred embodiment of the present invention provides a method for hard anodizing of deep-hole aluminum parts, which is used for aluminum parts in the deep hole 1 where the hard anodized part 4 is provided with a first through hole. This embodiment takes the shutter housing as an example, refer to figure 1 , figure 2 As shown, the valve housing is provided with a deep hole 1 of φ6.92. The hard anodized part 4 is located at the bottom of the deep hole 1 of φ6.92, which is the side wall of the fourth stepped hole 2. The anodized part 4 includes a first through hole, namely a φ3 small oil hole 5 at the bottom of the deep hole 1, which communicates with the outside of the valve housing. In this embodiment, the hard anodizing method of the side wall of the fourth stepped hole 2 of the valve housing includes the following steps:

[0049] (a) Insert the clamp 3 made of fluororubber material with a hollow pictograph tube structure into the deep hole 1 of the ...

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Abstract

The invention discloses a deep hole aluminum piece hard anodic oxidation method which is used for an aluminum piece of which a part to be subjected to hard anodic oxidation in a deep hole is provided with a first through hole. The deep hole aluminum piece hard anodic oxidation method is characterized in that before the hard anodic oxidation, a part which do not need to be subjected to the hard anodic oxidation in the deep hole is protected by a fixture, the first through hole and the deep hole are plugged by rubber stoppers, and the rest part of the aluminum piece is subjected to waxing protection; and when protective wax is not completely cooled, the rubber stoppers are pulled out to allow the first through hole to communicate with the part to be subjected to the hard anodic oxidation in the deep hole. According to the method, after the first through hole is waxed, the first through hole still communicates with the exterior of the aluminum piece, so that during the hard anodic oxidation, a solution can circulate very well, heat generated can be timely taken away in a reaction process, normal technological parameters of the reaction can be kept all the time, a machining process is stable and controllable, and the problems that a hard anodic oxide film is prone to be punctured and the aluminum piece is ablated in a hard anodic oxidation process due to temperature rise are solved.

Description

technical field [0001] The invention relates to the field of hard anodic oxidation, in particular to a method for hard anodic oxidation of deep-hole aluminum parts. In addition, the present invention also relates to a deep-hole aluminum part produced by the above-mentioned hard anodic oxidation method for the deep-hole aluminum part. Background technique [0002] Hard anodizing of aluminum alloy is a thick-layer aluminum anodizing process. The oxide film produced has high hardness, has tiny pores, can absorb lubricants, and can significantly improve the wear resistance of the base metal. In order to improve the service life of aero-engines, local hard anodic oxidation process is usually used in the wear-resistant parts of aluminum alloy pistons, casings, bearing housings and other parts. [0003] The aluminum alloy hard anodizing process selects a certain concentration of sulfuric acid solution, uses the part as the anode, and the lead rod as the cathode, maintains a consta...

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Application Information

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IPC IPC(8): C25D11/04
CPCC25D11/022C25D11/04
Inventor 任志华曹荣华董杨张晓峰刘志勇张黎明李淑华李晓鑫朱春莉
Owner CHINA HANGFA SOUTH IND CO LTD
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