"Machining" surface treatment


Release time:

2024-04-30

The manufacturing precision of meticulous machining is high, and the surface of the product is smooth during the use of the product, which means that the meticulous machining produced can save a lot of machining work and can be directly used in life. There will be many gray-black round shallow pits on the surface of meticulous machining. The pits will be filled with slag substances before the equipment is cleaned. The degree of these substances will directly affect the quality of our castings.

machining surface treatment:

1, chemical polishing: under the action of abrasive, chemical solvent, the surface of the workpiece chemical or electrochemical changes, so as to achieve the purpose of a process method;

2. Anodization: A method of coating an oxide film containing metal cations on the surface of the workpiece and oxidizing the color metal layer under appropriate conditions. Metal anodizing processes include electrolytic oxidation, chemical oxidation and plasma oxidation;

3, sandblasting: a process method to produce fine sand-like roughness on the surface of the workpiece by mechanical method to improve its surface friction characteristics;

4. Electroplating: A process of plating a layer of metal film on the surface of a metal or alloy by chemical or electrolytic method. Electroplating is a widely used and large amount of surface treatment technology in hardware processing.

The manufacturing precision of meticulous machining is high, and the surface of the product is smooth during the use of the product, which means that the meticulous machining produced can save a lot of machining work and can be directly used in life. There will be many gray-black round shallow pits on the surface of meticulous machining. The pits will be filled with slag substances before the equipment is cleaned. The degree of these substances will directly affect the quality of our castings.

Meticulous machining is the use of a cast iron material, its comprehensive performance is close to steel, it is based on its good performance, has been successfully used for casting some of the complex force, strength, toughness, requirements of the better parts. Ductile iron has developed into a common cast iron material second only to gray cast iron. The so-called "iron on behalf of steel", mainly refers to the ductile iron.

Meticulous mechanical processing matrix related departments are divided into three types: ferrite, pearlite, iron gray iron casting related departments are characterized by flake graphite. Element body + pearlite. C and Si are elements that can be graphitized. In order to make cast iron gray in casting, and not to control the composition of cast iron to 2.5-4.0 C and 1-2.5 Si too much and coarse graphite sheet. Elements such as AlCuNiCo in cast iron are also graphitized. Carbide forming elements such as nCrWMoV may also reduce the mechanical properties and fluidity of cast iron.

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Machining installation sequence and process

To arrange the detailed machining sequence, we need to follow the basic principles of "surface before hole" and "coarse before fine.

Mechanical processing technology Heat treatment process

With the development of aerospace, industry, microelectronics industry, modern and biological engineering technology, the demand for/detailed mechanical parts (feature size in micron to millimeter level) is increasingly urgent. The specificity of its structure and shape, the diversification of parts and materials, and the accuracy of size and surface quality have become the obvious characteristics of high-precision mechanical parts and their micro-devices and equipment, and the requirements in terms of use function, material characteristics, structure and shape, and sex are also getting higher and higher.

Machining details, forging and casting

In the process of meticulous machining, its mechanical properties are better than cast iron, but the cast iron properties of this material are poor, and the melting point is higher than other materials. There are many problems that need to be paid attention to in the process of processing, mainly because the flow performance of molten steel is relatively poor. In the process of processing, in order to prevent insufficient pouring or cold insulation from meticulous machining, the wall thickness of meticulous machining cannot be less than 8mm. The structural force of the gating system is relatively simple, in the process of using the equipment in the cross-sectional size of cast iron is large, so in the process of processing can also be used in the hot casting mold or dry casting mold.