What is the development experience of spring heat treatment equipment? What is the trend?
Spring heat treatment, I believe everyone knows it! Spring heat treatment is mainly tempering, so what is the development experience of spring heat treatment equipment? What is the trend of spring heat treatment equipment in the future? Let Kehua tell you about it! One . The development of spring heat treatment equipment has experienced my country's spring industry in the 1950s and 1960s basically manual workshop-style production, and the heat treatment equipment is backward and imperfect. At that time, the spring heat treatment was 'burning in fire, quenching in waterIn the 1970s and 1980s, with the development of the spring industry, box-type electric furnaces, smoke tempering furnaces and pit-type tempering furnaces began to be used, and temperature controllers were used to control the temperature to meet the requirements of the corresponding heat treatment specifications. In the 1990s, the reform and opening up drove the rapid development of my country's spring industry, introducing a number of foreign advanced technologies and equipment, such as Japan's continuous mesh belt furnace and Germany's automatic spring production line. Later, through rapid digestion and absorption, domestic continuous spring heat treatment equipment was successively launched. For example, the use of microcomputer numerical control technology makes temperature and time control more accurate, and realizes automatic production. Spring heat treatment Second, the current overview of spring heat treatment equipment Several heat treatment equipment commonly used for small and medium-sized springs: ① box-type resistance furnace and pit-type tempering furnace. Among them, box-type resistance furnaces are similar to current microwave ovens, generally using refractory bricks as insulation layers and heating them with resistance wires. Pit-type tempering furnaces are semi-underground installations, and foundation pits need to be dug. The power consumption ranges from a dozen kilowatts to more than one hundred kilowatts, and there are nearly 10 specifications. The production adopts centralized processing, uses material baskets and spreaders to place springs, and requires periodic operation of lifting equipment. The total power consumption is large, and the heat absorption of the basket spreader accounts for about 20% of the energy consumption. When dealing with springs in a centralized manner, because there is no smoke outlet, the environment in the workshop is seriously polluted. ② nitrate tempering furnace. Equipment for heat treatment using heated molten salt is divided into two types: internal heating and external heating. The production adopts centralized heat treatment, uses material baskets and spreaders to place springs, and requires periodic operation of lifting equipment. However, the nitrate tempering furnace has serious environmental pollution, has a pungent odor, and has a stimulating effect on the skin. ③Continuous mesh belt tempering furnace. It adopts mesh belt transmission, high-quality thermal insulation cotton to keep warm, and the heating tube is heated on both sides. It has the characteristics of fast heating, uniform heating, significant energy saving, continuous operation and convenient operation. Since there are smoke exhaust ports on both sides of the furnace, the oil fume can be discharged through the pipeline, and the pollution to the workshop environment is less. Since the 21st century, the continuous mesh belt tempering furnace has been applied by the vast majority of spring manufacturers, and has become the main heat treatment equipment for spring manufacturers. Spring heat treatment 3. The trend of spring heat treatment equipment in the future With the progress of science, the indicators of energy saving, environmental protection and time saving of spring heat treatment equipment will be higher in the future. For example, for a tempering furnace of the same size as ours (the width and length of the mesh belt are the same), the power consumption of the foreign tempering furnace is only 2/3 of ours, and the more amazing thing is that the heat treatment time for the spring is only half of ours. In other words, the domestic tempering furnace of the same specification is only 1/3 of ours in terms of energy consumption. Therefore, we still have a lot to do in terms of energy saving, such as adopting more advanced heating elements, better thermal insulation materials and more precise temperature control measures to achieve energy saving and high efficiency. Whether it is the current or future world, our requirements for environmental protection will be higher and higher. Therefore, it has become an inevitable trend to add an oil fume purification device to the tempering furnace, which can effectively reduce the pollution to the environment. What is the development experience of spring heat treatment equipment? What is the trend of spring heat treatment equipment in the future? After reading the content brought by Kehua above, I believe everyone has a clear understanding.