Die casting surface treatment method and its products
A surface treatment and surface pretreatment technology, applied in the direction of pretreatment surface, device for coating liquid on the surface, anodic oxidation, etc. The problems such as the loss of metal texture of the parts are eliminated, and the effects of anti-corrosion and use functions are better and more perfect, the process is environmentally friendly, and the mass production is high.
Active Publication Date: 2016-05-04
MITAC PRECISION TECH(KUNSHAN) CORP
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Problems solved by technology
[0004] (1) Alloy materials for die-casting determine that die-casting parts cannot be subjected to high-quality surface treatment. For example, the existing die-casting aluminum alloy cannot be anodized; magnesium alloy has active chemical properties and poor corrosion resistance, so it must be painted or filmed. Surface treatment of decorative parts, however, this will make the die-casting parts lose their metallic texture;
[0005] (2) Die castings have inherent and inevitable casting defects, such as pores, cracks, inclusions, local depressions and flow marks, etc. These defects make the subsequent process difficult and also reduce the yield of die casting products
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[0022] For a further understanding of the purpose of the present invention, method steps and functions, please refer to figure 1 , and detailed below.
[0023] In order to achieve the above object, the present invention provides a method for surface treatment of die castings, which comprises the following steps:
[0024] Step 101: providing a die casting with slight defects on the surface;
[0025] Step 102: Grinding and mechanically removing the surface of the die-casting part, and then degreasing, ultrasonic cleaning and drying the treated surface;
[0026] Step 103: Grinding the defective parts on the surface of the die-casting after the above treatment, and then performing cold spraying treatment to repair the defective parts, and finally cold spraying a layer of metal with a uniform thickness of 20 μm to 100 μm on the surface of the die-casting Material, grinding and machining the above-mentioned die-casting parts after cold spraying to obtain a uniform die-casting part...
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Abstract
The invention relates to a die casting surface treatment method and a product thereof. The method comprises: (1) die casting forming of a work-piece; (2) a surface pre-treatment; (3) cold spray coating; and (4) a micro-arc oxidation treatment. The product is the product produced through treatments by using the method. According to the present invention, the cold spray coating technology and the micro-arc oxidation surface treatment technology are combined to produce the high texture die casting finished product on the defective die casting surface, the surface treatment method has characteristics of environmental protection process, simple process and substantial die casting finished product yield increase, and is suitable for large scale industrial application, and the treated product has characteristics of good corrosion resistance, compactness, beautiful appearance, and ceramic texture effect.
Description
【Technical field】 [0001] The invention relates to a method for treating the surface of a die-casting part and its product, in particular to a method for treating the surface of a die-casting part and its product when high-quality appearance treatment is required. 【Background technique】 [0002] With the development of science and technology, modern products require stylish appearance and rich texture while pursuing functions. When seeing engineering plastics and piano paint all over the place, suddenly there is a product made of all-aluminum metal with a sense of fashion and technology. This huge visual contrast brings people not only surprise, but shock , This is the reason why Apple's products such as iPhone, MacBook Air, etc. are favored by users. Their appearance treatment adopts aluminum stamping integrated forming technology, that is, a kind of mechanical processing that uses aluminum alloy extruded sheet and is integrally formed by CNC machine tools. technology. The...
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IPC IPC(8): C25D11/02B05D7/14B05D3/12
Inventor 郭雪梅孙兵兵
Owner MITAC PRECISION TECH(KUNSHAN) CORP