Heat treatment of bed castings of horizontal lathe by high frequency induction heating equipment

The lathe bed casting is the main basic part of the machine tool and plays a supporting role during work. During the processing and forming of mechanical parts, some residual internal stress will be generated in the casting of the lathe bed. In the process of use, it will also be deformed and lose its original precision due to the influence of external force, vibration and environmental temperature changes. Therefore, in order to solve the above problems, we will use gray cast iron when producing lathe bed castings. And the heat treatment process is carried out by high-frequency induction heating equipment to further improve its performance.

The heat treatment process of lathe bed castings includes low temperature annealing and high frequency quenching. Due to the uneven wall thickness of the lathe bed castings, during the cooling process, plastic deformation to elastic deformation will occur due to the difference in time, and internal graphitization will also cause the volume of the casting to change, making the casting in the production process. produce stress. This will further lead to serious deformation of the casting, and even affect the stability and maintenance of the lathe precision. Therefore, the casting should be annealed at low temperature to eliminate internal stress.

When high-frequency induction heating equipment performs induction heating and quenching on lathe bed castings, it is necessary to check in advance whether the position of the sensor is correct, whether there is deformation, and adjust the relative distance between the sensor and the casting in time. Keep the speed of the sensor steady so that it heats up evenly and avoids overheating. Pay attention to observe the heating temperature of quenching at any time to prevent the temperature from being too high or too low, which may cause cracks in the casting of the lathe bed. It should also be noted that the cooling device can spray water normally, and if there is a problem, it must be solved in time.