About the technology of surface treatment of CNC machined products

What is the surface treatment of CNC machined products? Generally, some metals, stainless steel, aluminum materials, machine equipment shells, etc. need to be subjected to surface modification and beautification after preliminary processing and forming, which is called surface treatment of CNC product processing.

The surface treatment of CNC machining products generally has four categories: 1, beautiful, 2, protection, 3, special surface treatment, 4, mechanical or engineering surface treatment . Although the surface treatment industry is not the mainstream of the industry, only through surface treatment can the characteristics and value of products be brought into full play. The application of industrial technologies such as electroplating, anodizing, chemical treatment, and painting can achieve multi-projects such as corrosion resistance, enhancement of weldability, lubricity, wear resistance, adhesion, and prevention of carburization of steel. Therefore, surface treatment is an indispensable process for various CNC machining and manufacturing industries.

Technical types of surface treatment of CNC machined products

Surface formation is divided into three categories:

1. Mechanical Method (beading method, cutting, honing, sandblasting, fine grinding, grinding, super machining)

2. Metallurgical method (surface hardening, (quenching, carburizing, nitriding), diffusion coating method )

3. Chemical method (electrolytic grinding, pickling, chemical grinding, acid etching engraving)

About the pretreatment of CNC processed products

Significance of pretreatment

The general pretreatment engineering process is: grinding, preparation, cleaning, water washing, electrolysis, deesterification, water washing, acid leaching and activated water, neutralization, water washing, plating.

Purpose of pre-treatment

The purpose of pre-treatment is to obtain a good coating, because the plated parts are in the process of manufacturing, processing, handling and storage. There will be grease, oxide scale, hydroxide, dust and other contaminants attached to the surface of the plated parts. If these contaminants are not removed and electroplating is performed, a good coating will not be obtained. Plating quality, pre-treatment plays an important role.

Coating defects caused by poor pretreatment

Coating defects caused by poor pretreatment include the following: (1) Peeling , (2) air swelling, (3) stains, (4) uneven gloss, (5) unevenness, (6) small holes (7) reduced corrosion resistance, (8) embrittlement, (9) poor electroplating , the pre-processing accounts for a large reason.

The above is about the technology of surface treatment of CNC machined products. If you have better suggestions, you can inquire and negotiate.

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