The cast iron bed hardening by medium frequency induction heating machine

The cast iron bed of the heavy-duty machine tool has a large workpiece, a large cross-sectional area of the bed and high production costs. In production, often due to improper induction heating process or poor design of the inductor, as well as structural defects of castings, etc., the workpiece will produce quenching cracks and cracks during medium frequency induction heating and quenching, which will seriously cause the bed to be scrapped, affect the production of machine tools, and cause economic losses. The medium frequency induction heating equipment produced by Zhengzhou Gou's can solve these defects.

For the quenching of large cross-section cast iron bed rails, double-circuit inductors are often used, and Mönchen guide magnets are attached. Dual-loop sensor front-stage preheating, post-stage quenching heating and water spray cooling. The sensor makes the heating point of the bed bed take about 5 seconds from preheating to spraying water cooling, which can ensure that the bed bed is heated evenly. During the operation, attention should be paid to the moment of starting and stopping. If there is negligence, a transverse low-temperature zone is likely to occur in the gap area of about 12 mm between the two poles. During quenching, several longitudinal cracks of 10-20 mm will be generated in this area. This is because the surface stress of cast iron itself is large, and the structure contains a lot of primary cementite. During production, a single-loop sensor can be used to prevent the lateral low-temperature zone, but pay attention to controlling the instantaneous temperature when starting the car during operation. If the heating temperature is low, the above-mentioned cracks still appear, and if the temperature is too high, it is easy to cause local overburning or cracking of the workpiece.

The unique advantages of Zhengzhou Gou's medium frequency induction heating machine

1. Small size, light weight, simple installation and easy operation.

2. The frequency band is wide, which can meet the pre-forging heating, heat treatment, brazing, etc. of different workpieces。

3. The unique cooling circulation system ensures that the equipment can work continuously for 24 hours.

4. Safe and reliable, no 10,000 volts of high voltage, very safe for operators.

5. High efficiency and obvious power saving, 60% power saving compared with traditional high-frequency equipment and 20% power saving compared with thyristor medium frequency equipment.