DIN 603 bolt raw materials and related technologies are lagging behind. An important reason for the poor quality of DIN 603 bolt products is the poor quality of raw materials and the backwardness of related technologies. For example, cold heading steel wire cold heading steel is mainly used to manufacture fasteners such as bolts, nuts, rivets and bolts. Its chemical composition and metallographic arrangement are relatively high. Now the annual demand for cold heading steel is about 1 million tons. In the meantime, the automobile industry demanded 100,000 tons. However, due to technical reasons, the domestically produced cold-rolled steel wire only needs 300,000 tons, and imports nearly 700,000 tons per year.
The DIN 603 bolt process and process equipment are of low level, and the DIN 603 bolts do not guarantee the consistency of product quality. The mechanical basic parts are generally batch and many products, and there are also many kinds of products and processing precision requirements. Therefore, the production process and equipment are required to be high and the capital is large. Foreign countries have chosen high-efficiency and high-precision special planes, production lines or flexible lines, and have completed high-efficiency automated production.
DIN 603 bolts are critical to the manufacture and inspection of equipment. Mechanical universal parts have high requirements for standard accuracy, functional reliability and interchangeability of each part. DIN 603 bolts only allow very few products to be out of tolerance, and It is checked out before the factory to remove the unqualified products. It is assumed that there is no high-precision and high-efficiency equipment, and it is difficult for the company to live and open in the fierce competition. At present, the key equipment of China’s parts and components production enterprises is mainly relying on imports, because the wear and tear of equipment is large, and the equipment demand is constantly updated and transformed. The imported equipment and spare parts are expensive, and it is necessary to speed up the handling of critical equipment if you want to speed up the operation.
DIN 603 bolt product development speed problem. China’s mechanical parts operations are far behind in terms of technological innovation and new product development, especially for SMEs, which lacks technical strength and talents, short funds and necessary equipment, and less information about technology and technology communication, resulting in long-term tracking. In the imitation stage, there are very few intellectual property rights. Now there are not many researches on the development of DIN 603 bolt products. There are few independent research and development efforts in the enterprise. This is a key issue for the continued development of the operation.