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What are the surface treatment methods of aluminum alloy die castings? According to the quick screen editor, the commonly used technologies are: Aluminum phosphating, aluminum alkaline electrolytic polishing process, aluminum and aluminum alloy environmental protection chemical polishing, aluminum and its alloy electrochemical surface strengthening treatment, and YL112 aluminum alloy surface treatment process. The details are as follows: 1. Aluminum phosphating The accelerator, fluoride, Mn2 +, Ni2 +, Zn2 +, PO4 were studied in detail by means of SEM, XRD, potential time curve and film weight change; And Fe2 + on the phosphating process of aluminum. Research shows: Guanidine nitrate has…

The numerical control electric discharge machining is to use the moving fine metal wire as the tool electrode, pass the pulse current between the metal wire and the workpiece, and use the electric corrosion of the pulse discharge to cut the workpiece. This kind of processing has the characteristics of high precision of parts, suitable for the processing of plane complex shape parts, flexible application, short processing cycle and material saving. Next, we will specifically introduce the characteristics of CNC WEDM. At present, in the research and development of new products, a large number of CNC wire cutting technology are…

How to repair the refrigerator when it breaks down? A refrigerator is a mechanical device that uses a compressor to change the pressure of refrigerant gas to achieve low-temperature refrigeration. It is useful in many equipment, such as central air conditioning. Generally, the refrigerator uses the tubular heat exchanger to complete the material heat exchange. When the carbon steel tubesheet is used as the cooler, the welds between the tubesheet and the tubular often have corrosion leakage. The leakage into the cooling water system will cause material waste and environmental pollution, and even affect the safety production of the enterprise…

NC machining technology is derived from conventional machining technology, which is an organic combination of conventional machining technology, computer numerical control technology, computer aided design and auxiliary manufacturing technology. With the continuous development of technology, more and more parts need to be precision machined in modern manufacturing industry, and the requirements for machining accuracy and surface complexity of workpieces are becoming higher and higher. Therefore, NC machining has been widely concerned, but in terms of cost saving, NC machining is still higher than traditional machining. Next, we will specifically introduce the difference between CNC machining and traditional machining technology. 1.…

In machining, the cutting tool is the basic process equipment for cutting. It is in direct contact with the parts to be processed. Different cutting tools can process different part structures and parts surfaces, which plays a vital role in machining. It can be called "industrial teeth". As a consumable, the tool itself has a certain life. Different materials and different specifications have different life; For mass production, tool consumption also occupies an important part in the processing cost. Therefore, improving tool life, controlling tool consumption, reducing processing cost and improving production efficiency are the common problems faced by manufacturing…

Under the background of the continuous integration of informatization and industrialization, information technology has penetrated into all links of the industrial chain of industrial enterprises, and the amount of data owned by traditional industrial enterprises is increasingly rich. Big data analysis has brought a new dimension of manufacturing industry research and trend analysis. From the perspective of new multi-dimensional functions and expanded fields, data has become the compass leading the growth of manufacturing industry. The fundamental strength of big data analysis lies in the quality of data, and the source of data naturally becomes the top priority. At present, the…

The most important ten items for mold design learning: mold steel, structural design, mold processing, standard parts, flying mold, polishing / leather, mold assembly, cooling water path, and mold maintenance. 1. Die steel Steel is the decisive factor of mold quality, and selecting reasonable steel is the most important. The criteria for selecting steel are: ① Requirements for injection molding materials - different plastics should use different steels, such as requirements for high polishing and corrosion resistance; ② Price - steel properties are good as long as they can be used, not the more expensive the better; Considering the cost…

◆ common sense of sand blasting and rust removal Sand blasting and rust removal is to use compressed air as power to form a high-speed jet beam to spray materials (copper ore sand, quartz sand, carborundum, iron sand and Hainan sand) onto the surface of the workpiece to be treated at high speed, so that the appearance or shape of the outer surface of the workpiece surface changes. Due to the impact and cutting effect of the abrasive on the workpiece surface, the surface of the workpiece can obtain a certain degree of cleanliness and different roughness, The mechanical properties…

Metal: a material with good thermal conductivity and conductivity, which is opaque and metallic luster, and whose conductivity decreases with the increase of temperature, and is rich in ductility and expansibility. A solid (i.e., a crystal) in which atoms in a metal are arranged regularly. Alloy: a substance with metallic properties composed of two or more metals or the fusion of metals and nonmetals. Phase: refers to the independent and uniform components in the metal or alloy with the same chemical composition, the same lattice structure, or the same atomic aggregation state, and a clear interface with other parts. Organization:…

1、 Comparison of temperature resistance between PPR water pipe and PE water pipe Under normal use, the maximum stable temperature of PE water pipeline is 70 ℃, and the minimum temperature is - 30 ℃. In other words, in such a temperature range, long-term use of PE water pipes is safe and reliable. Under normal use, the maximum stable temperature of PPR water pipeline is 70 ℃, and the minimum temperature is - 10 ℃. It also shows that the long-term use of PPR water pipeline is safe and reliable within such temperature range. It is concluded that PE water…