Induction coil of medium frequency induction furnace

 The induction coil of the medium frequency heating furnace is the inductor of the medium frequency furnace. As the load of the medium frequency heating furnace, a rectangular copper tube is wound into a spiral shape according to a certain number of turns. Through the alternating current, an induced magnetic field is generated to achieve the purpose of heating the metal. The induction coil of the medium frequency heating furnace has a great influence on the heating effect. Next, I will briefly introduce the basic knowledge of the induction coil, I hope it will be helpful to everyone.

1. The induction coil heating of the medium frequency heating furnace follows the following electromagnetic induction effects: ring effect, skin effect, sharp corner effect, proximity effect.

2. The function of the induction coil of the medium frequency heating furnace is to transfer the induction current and then achieve the purpose of heating the workpiece. The induction coil is an important part of the medium-frequency heating sensor. The design and manufacture of the induction coil have a great influence on the heating of the medium frequency heating furnace.

3. The diameter of the induction coil of the medium frequency heating furnace is determined according to the diameter of the workpiece. According to the ring effect, the closer the diameter of the induction coil is to the diameter of the workpiece, the better. The diameter of the induction coil is generally 30-40mm larger than the diameter of the workpiece. Generally speaking, thick and short workpieces have smaller thermal distortion and smaller gaps, while thin and long workpieces have larger thermal distortions and larger gaps.

4. The length of the induction coil of the medium frequency heating furnace. If it is heated before forging, the length of the coil is generally 3-4 times the length of the workpiece; if it is quenched, the height of the induction coil should be 15% shorter than the workpiece by one-time integral heating (the workpiece does not move) At the mercy; there is no strict requirement for the height of the induction coil of successive heating furnaces, generally about 20mm. To prevent cracking caused by the sharp corner effect of the end face, there should be a certain gap.

5. The cooling water of the induction coil of the medium frequency heating furnace is generally designed and determined according to 45% of the healing power. The parameter refers to the heat conversion of 1kw·h=860kcal to calculate the cooling water demand; the induction coil of the heating furnace is quenched, and the diameter of the workpiece should be ensured. , The shape of the quenching area and the passage of the cooling water, and the general water sprayer and the induction coil cooling groove should ensure that there is a sufficient amount of cooling water.

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