With the continuous development and application of new technologies and new materials in my country's die-casting industry, it is also seen everywhere in life. Due to the characteristics of die-casting production, the quality of aluminum alloy die-casting parts is affected by its production, management, molds, die-casting and other technologies. If the control is not good, the rejection rate of die-casting will be very high, which will cause a waste of manpower, material resources and financial resources. Affect economic efficiency and product quality. From what sources can the quality of aluminum alloy die castings be controlled?
1. For raw material control
In order to improve the quality of die castings and the qualification rate of products, the quality should be strictly controlled when raw materials are selected. Usually, sampling inspection is adopted for each batch of incoming materials to measure the chemical composition of the main elements of the alloy, and then according to the alloy The influence of various elements in die casting, machining, surface treatment and other subsequent processes, strictly control the chemical composition of aluminum, zinc, magnesium, copper, iron and so on.
2. For mold quality control
The design of mold structure plays an important role in the quality of aluminum alloy die castings. For example, the inner gate must.. The alloy melting has a suitable flow, flow rate and pressure; the design of the overflow groove.. The metal can fill the cavity during die casting to reduce casting Insufficiency, looseness, shrinkage holes and other die casting defects; the design of the exhaust groove should make it exhaust smoothly and so on. Only after the structural design of the mold is reasonable, the quality and production efficiency of aluminum alloy die castings will not be affected.
Therefore, in order to control the quality of aluminum alloy die castings, we must pay great attention to the raw materials and molds. Only by controlling the quality from these points can we get high-quality castings.