The customer asked: Our drawings require high tolerance accuracy. Can you do it?

Cheng Zhu: We have seen many drawings with high precision requirements, but you can be sure that the higher the precision, the greater the processing cost. Therefore, the dimensional tolerance of the part drawing should be marked according to the actual situation, not the higher the mark, the better.

Customer asked: If the product does not meet the requirements, how to do?

Cheng Zhu: First of all, let's analyze what the problem is. If it is our processing mistake, we will arrange heavy work or discuss with the customer in the first place. If the product is scrapped due to wrong drawings of the buyer, we will discuss it separately. Any problem can be satisfactorily solved through communication and negotiation until you are satisfied. If there is a professional bad reviewer making trouble without reason and we will never compromise if we reach out for money, we will definitely carry out the complaint to the end.

Customer asked: What is the minimum order quantity for processing customization? How to calculate the sample?

Cheng Cast Answer: Our minimum order quantity is 2000/mold, involving mold design and development, die casting, water removal, batch front, burr, drilling, tapping and CNC processing. Polishing/vibrating, surface treatment and other one-stop processing business, if your company chooses to open molds in our company to produce products, our company will provide customers with samples free of charge to maintain and maintain the molds for customers.

Customer asked: what are the characteristics of aluminum alloy die casting?

Aluminum is a very light metal, can be used to manufacture a variety of requirements to reduce the quality of parts, such as automotive, aviation, aerospace parts.

2. Good electrical and thermal conductivity.

3. Good anti-oxidation corrosion performance. In the air, the surface of aluminum is easy to produce a layer of dense trioxide two sulfur oxide film, can prevent further oxidation. However, aluminum is not resistant to corrosion in alkaline media and brine.

Aluminum has high strength and good plasticity, and can be processed into various shapes.

Aluminum is also very brittle at low temperatures and can be widely used in refrigeration equipment. Industrial pure aluminum is mainly used in the manufacture of wires, aluminum foil, anti-corrosion aluminum clad materials and conductive parts. Magazine content greater than 2 of the industrial pure aluminum used to make utensils, daily necessities and decorative materials.

The customer asked: Why can't the machining allowance in the hole of aluminum die casting exceed 0.25mm?

In order to be suitable for die casting, human beings have added a lot of silicon (SI) to the aluminum alloy used for die casting. When the aluminum alloy condenses in the mold, the silicon floats to the surface, forming a thin silicon film. This layer of silicon film, hardness is very hard, very wear-resistant. Some OEM designers take advantage of this feature. The inner surface of the hole of the die casting is directly counted as the bearing surface. This silicon surface layer is generally only 0.2 to 0.9mm. If you process too much, the life of this bearing surface will be shortened.

The customer asked: why aluminum die castings, when polished, there will be black spots?

Answer: There are several reasons for this. There may be silica, or alumina formation. The solution is simple, using fresh aluminum ingots. However, the greatest possibility is from the release agent. It could be, we spray too much mold release. It is also possible that the organic content of the release agent is too high. At the temperature of hot-melt aluminum, some of these organics are reduced to carbon, and some become organic macromolecular polymers. The mixture of these carbon molecules and polymers, when the aluminum casting is formed, is contained in the surface layer and becomes the dark spot we see. We can reduce the concentration of spraying agent, switch to another spraying agent, or lengthen the blowing time after spraying. To reduce the formation of carbon elements and prevent the accumulation of macromolecular polymers