Conveyor aggregate with forced heating of parts for quenching and tempering

Conclusions

• 1. In designing electric furnaces, especially for continuous automatic lines, high-speed or forced heating should be envisaged. It is advisable to switch the existing electric furnaces from the ordinary to the high-rate operation. This problem becomes particularly important for mass production plants where many electric furnaces are in operation and the product is held at the final temperature for a short time (ball bearing industry, small parts manufacturing, etc.).

• 2. It is necessary to organize the production of saturation chokes and use them in electric furnaces with accelerated or forced heating so as to provide a proportional temperature control instead of the on-and-off type. In this way, the operational reliability of the temperature control system will be improved by removing mobile elements from the system, the heaters will last considerably longer and the furnace operation system will be simplified.