Method for forming anodic oxide skin membrane on inner wall of cylinder made from aluminium alloy

Abstract

The present invention relates to a method for forming anodic oxide skin film on the aluminium alloy cylinder inner wall. Said method includes the following main steps: using at least one insulating partition board to divide aluminium alloy cylinder inner wall into at least more than one adjacent oxide skin film formation interval and solid lubricant coating interval; mounting said insulating partition board on a stainless steel centre rotating shaft so as to implement turning operation; in the course of making anodic oxidation treatment utilizing the continuous rotation of said stainless steel centre rotating shaft to make said oxide skin film formation interval and solid lubricant coating interval be continuously, repeatedly and alternatively-changeably applied on the cylinder inner wall surface so as to make the cylinder inner wall surface obtain a hard wear-resistant oxide skin film surface layer which has uniform thickness and lubrication extent and has the permanent self-lubricating function.

Description

technical field [0001] The invention relates to a method for forming an anodic oxide film on the inner wall of an aluminum alloy cylinder, in particular to a method for using at least one insulating partition plate to divide the inner wall of an aluminum alloy cylinder into at least one adjacent area for forming an oxide film and solid lubricant coating. The coating area, and the insulating partition plate are set on a stainless steel central rotating shaft, which can be rotated to implement the anodic oxidation process, and the central rotating shaft will be able to cause the oxide film to form between the interval and the continuous rotation. The solid lubricant coating interval is applied alternately and repeatedly to the inner wall of the cylinder, so that the inner wall of the cylinder can obtain a hard, wear-resistant, and permanent self-lubricating effect on the inner wall of the cylinder. Anodic oxidation of the oxide film surface Film formation method. Background te...

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Problems solved by technology

Furthermore, since the inner wall surface of the cylinder of the alloy cast iron is not a smooth surface, it will be more prone to carbide adhesion during the operation of the piston.

[0006] 2. When the electroplating layer is directly applied to the inner wall of the aluminum alloy cylinder, since the electroplating layer is not lubricating, the inner wall surface of the cylinder formed by it also has no lubricating effect, and the initial operation of the piston in the cylinder is also affected less smooth defect

That is, when implementing anodic treatment or spark discharge anodic treatment, since the aluminum alloy product and the solid lubricant are soaked in the electrolyte in a static manner at the same time, the solid lubricant must be unable to evenly contact and embed into the oxidation of the aluminum alloy product. In this way, for the inner wall of the aluminum alloy cylinder, it is a lubricating layer produced by a lubricating layer with uneven thickness and different positions. In addition to greatly reducing the effect, it still cannot fully provide the smoothness of the initial operation of the piston. In particular, the lubricant coated on the surface of the oxide film will also disappear or reduce the lubricity as the piston continues to operate.

[0009] It can be seen that the above-mentioned existing anodizing method (Anodizing) and spark discharge anodizing method obviously still have inconvenience and defects in actual manufacture and use, and need to be further improved urgently.

In order to solve the problems existing in the anodizing and spark discharge anodizing methods, the relevant manufacturers have tried their best to find a solution, but for a long time no applicable design has been developed, and there are no suitable general products. The structure can solve the above problems, which is obviously a problem that the relevant industry is eager to solve

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