Aluminum is widely used in machinery manufacturing industry. The so-called mechanical manufacturing is the industrial sector engaged in the production of various power machinery, lifting and transportation machinery, chemical machinery, textile machinery, machine tools, instruments and other mechanical equipment. In China, the machinery manufacturing industry is to provide technical equipment and support for the entire national economy. As China attaches great importance to the development of equipment manufacturing industry, machinery manufacturing industry not only occupies the leading position in the proportion, accumulation and employment of China's industry, but also provides an important material basis for the development and production of new technologies and new products. It is an indispensable strategic industry for China to realize modern economy.