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Method of producing aluminum alloy cylinder

A production method and technology of aluminum alloy, which is applied in cylinders, cylinder heads, anodic oxidation, etc., can solve the problems that the loose layer on the ceramic surface cannot be effectively removed, and the cylinder is damaged, so as to achieve heat dissipation of the cylinder body, long service life, and space-saving smaller than the effect

Inactive Publication Date: 2007-03-14
SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a micro-arc oxidation treatment process for the inner surface of an aluminum alloy cylinder and a mechanical cutting method for an alumina ceramic layer, so as to solve the problem of damage to the cylinder block or piston of an internal combustion engine, and the loose layer on the ceramic surface in the cylinder. Difficulties that cannot be effectively removed before the body is used to improve the reliability and service life of the internal combustion engine and reduce the cost of use

Method used

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Experimental program
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Embodiment 1

[0021] The alkaline electrolyte is prepared according to the ratio of weight to total volume, sodium hexametaphosphate 20g / L, potassium carbonate 10g / L, sodium silicate 5g / L, ammonium metavanadate 1.5g / L, and the pH value range Control between 8-12; the alkaline electrolyte flows into the cylinder from one end of the stainless steel tube, flows out from the other end of the cylinder, and circulates in the cylinder through the cooling circulation system; the machined aluminum alloy cylinder is connected to a DC pulse The anode of the power supply and the stainless steel tube are connected to the cathode of the DC pulse power supply, and the stainless steel tube is placed in the middle of the inner cavity of the cylinder, and the DC pulse power supply applies a voltage of 300V-550V to the cylinder for 40 minutes; after micro-arc oxidation treatment, the cylinder is removed for Clean and dry. After the cylinder is dry, use a nylon wheel with a polishing paste for rough polishing. ...

Embodiment 2

[0023] The alkaline electrolyte is prepared according to the ratio of weight to total volume, sodium hexametaphosphate 20g / L, potassium carbonate 10g / L, sodium silicate 5g / L, ammonium metavanadate 1.5g / L, and the pH value range Control between 8-12; the alkaline electrolyte flows into the cylinder from one end of the stainless steel tube, flows out from the other end of the cylinder, and circulates in the cylinder through the cooling circulation system; the machined aluminum alloy cylinder is connected to a DC pulse The anode of the power supply and the stainless steel tube are connected to the cathode of the DC pulse power supply, and the stainless steel tube is placed in the middle of the inner cavity of the cylinder, and the DC pulse power supply applies a voltage of 300V-550V to the cylinder for 40 minutes; after micro-arc oxidation treatment, the cylinder is removed for Dry, after the cylinder body is dry, use a nylon wheel with a polishing paste for rough polishing for 2....

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Abstract

The invention discloses a production method for Al-alloy cylinder. A series of problems that surface finish of cylinder inner face machined by prior production method is not fit to technology and use demand of cylinder, internal combustion engine scuffs cylinder easily, the stability of cylinder is bad and life time is short, are solved. The primary scheme is that cavity of Al-alloy cylinder is machined mechanically; the cavity surface machined mechanically is treated with micro arc oxidation in alkaline solution by DC pulse power supply to form alumina ceramic layer; the layer is washed and dried; the layer is machined mechanically and washed thereafter.

Description

Technical field: [0001] The invention relates to a production method of an aluminum alloy cylinder body of an internal combustion engine, in particular to a micro-arc oxidation treatment process for forming an alumina ceramic layer on the inner surface of the aluminum alloy cylinder body and a cutting process method for the alumina ceramic layer. Background technique: [0002] As an important part of the internal combustion engine, the aluminum alloy cylinder block has been widely used for a long time because of its light weight and high strength. Electroplating or other surface hardening treatment is performed on the internal friction surface before use to increase its wear resistance. The micro-arc oxidation treatment process is a treatment process for the inner surface of an aluminum alloy cylinder developed in recent years, especially the micro-arc oxidation treatment process for the alumina ceramic layer, such as the aluminum alloy cylinder with the publication number C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/00C25D11/04
Inventor 孔祥文尤学建崔景国陈为伦刘占文
Owner SHANDONG HUASHENG PESTICIDE APPL MACHINERY CO LTD
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