How to use induction heating technology in forging industry

Induction heating technology is widely used in forging industry due to its energy saving, pollution-free and easy drying to realize the temperature control of forging heating.

1. Application of induction heating equipment at this stage
(1) The application of induction heating equipment at this stage is mainly reflected in the overall heat transmission of hand injuries. At the present stage, the connecting rod, crankshaft and steering knuckle of the dry truck are all subject to induction heating. The scraper in the coal machine and the chain rail link on the mining machine are forged by induction heating. Even if there were users who used gas heating in the past, they basically changed to induction heating through technical transformation. With the domestic investment in the automobile industry in recent years, many large-scale forging lines have been put on the domestic market, so many large-scale induction heating equipment have also been born.

(2) With the increasing requirements of the application enterprises for forgings, the equipment manufacturers can not only meet the requirements of heating the equipment, but also go deep into the production management process of users to solve various problems encountered by users in the forging process. Similarly, the oxide scale generated in the heating process has always been a headache for many users, especially for gear forgings. Many users have tried every way to remove the oxide scale. Here is a brief introduction to the experience of several users: using atmosphere protection, ammonia gas is filled into the induction furnace neck as a protective atmosphere to remove oxide scale; Use the flame generated by oxygen spontaneous combustion at the entrance of the induction furnace to isolate oxygen from entering the induction furnace and remove the oxide scale; Some users first heat the broken hand to a certain temperature, then spray graphite, and then enter the induction furnace for secondary heating to reach the forging temperature. This process is relatively mature. The heating of special-shaped parts encountered by users in the process of use is also a problem that the equipment manufacturer needs to solve. The inductor design is a difficult point. If the automation of production is to be considered, it is more difficult.

3) How to improve the power of the power supply. The power of a single machine power supply is limited by its internal conditions, and it is difficult to increase the power to a certain extent. We can only try to increase the power through other ways to meet the requirements of production. We can increase the power to more than twice through parallel operation.

2. Development direction of induction heating technology

(1) The power supply will be more energy-efficient At present, many domestic manufacturers still use the thyristor power supply stage, and foreign countries have already entered IGBT power supply. Compared with the thyristor, 1GBT has more obvious energy-saving effect. Now some manufacturers in China are trying to develop IGBT power supply, but the power is not very large, and the effect is not very ideal,

(2) The equipment control is more intelligent and automatic. Due to the increase of labor cost, many forging manufacturers are trying to improve the automation of the production line and try to avoid using personnel to operate. First, how to solve the feeding problem. According to the size of the heating hand, a variety of methods can be used. Second, solve the interface between the furnace outlet and various presses and robots. In recent years, with the increase of labor costs, many manufacturers have begun to consider using robots to replace labor. Therefore, manufacturers of induction actuating equipment will require Tiger Mao Huai to transmit information between intermediate frequency furnaces and robots. Third, due to the different forging techniques of various forgings, users use different presses, and the interface between intermediate frequency furnaces and presses is also a problem that intermediate frequency furnace manufacturers need to consider.