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S136 is used for mold steel, which is guaranteed to reach 500000 times. The products are made of good steel, and 100 of each process is fully inspected and shipped. The aluminum alloy die-casting is formed at one time, the shell is polished and anodized, and the surface is coated with corrosion-resistant paint, which is more corrosion-resistant. The ordinary electroplating salt spray test can reach 48-720 hours.

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Product Description


Zinc alloy die-casting is a precision casting method that uses high pressure to force the metal melt into a metal mold with a complex shape.
The later processing technology of aluminum alloy products is more, mainly in the following types:
1. Sandblasting, the main function is surface cleaning. Sandblasting before coating (painting or plastic spraying) can increase the surface roughness and contribute to the improvement of adhesion, but the contribution is limited, which is not as good as chemical coating pretreatment.
2. Passivation is a method to convert the metal surface into a state that is not easy to be oxidized, and to delay the corrosion rate of the metal.
3. Coloring: There are mainly two processes for coloring aluminum: one is aluminum oxidation coloring process, and the other is aluminum electrophoresis coloring process, which forms various colors on the oxide film to meet certain use requirements, such as black for optical instrument parts and golden yellow for commemorative medals.
Conductive oxide (chromate conversion coating)-used for both protective and conductive applications.
4. Chemical polishing Chemical polishing is a chemical processing method that uses aluminum and aluminum alloys to produce selective self-dissolution in acidic or alkaline electrolyte solutions to smooth and polish the surface to reduce its surface roughness and PH.
This polishing method has the advantages of simple equipment, no power supply, no limitation on the size of the parts, high polishing speed and low processing cost. The purity of aluminum and aluminum alloy has a great influence on the quality of chemical polishing. The higher the purity, the better the polishing quality, and vice versa.
5, chemical oxidation: the oxide film is thin, the thickness is about 0.5~4 microns, and porous, soft, with good adsorption, can be used as the bottom of the organic coating, but its wear resistance and corrosion resistance are not as good as anodic oxide film;
The process of chemical oxidation of aluminum and aluminum alloys can be divided into two categories: alkaline oxidation and acidic oxidation according to the nature of the solution.
According to the nature of the film can be divided into: oxide film, phosphate film, chromate film, chromic acid-phosphate film.
Spraying: used for external protection and decoration of equipment, usually on the basis of oxidation. Aluminum parts should be treated before coating to make the coating and the workpiece combined firmly, there are three general methods: phosphating (phosphate method), chromium (chromium-free chromium), chemical oxidation.
7, electrochemical oxidation, aluminum and aluminum alloy chemical oxidation treatment equipment is simple, easy to operate, high production efficiency, does not consume electricity, wide range of applications, not limited by the size and shape of parts. The thickness of the oxide film is about 5~20 microns (the thickness of the hard anodic oxide film can reach 60~200 microns) has high hardness, good heat resistance and insulation, corrosion resistance is higher than that of the chemical oxide film, porous, and has good adsorption capacity.

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