Operation points of billet induction heating furnace
The purpose of the billet induction heating furnace : It is used to heat carbon steel, alloy steel, ball bearing steel, including ferritic steel and austenitic steel, to the maximum extrusion temperature of 1250℃T. Billet “plus hot” furnace heated to 1250 deg.] C after the punch a hole shall be due to a decrease in the temperature of the billet , “then the heating” furnace, and then extruded.
The induction heating furnace can process 4 kinds of billets with different diameters. Changing from one diameter billet to another diameter billet requires some adjustments to the furnace and replacement of the inductor.
The coil of the inductor is wound with a special-shaped pure copper tube, arranged in a single layer, cooled by water, with a magnetic conductor, and an open tube made of high temperature resistant material in the coil, and there is a protection between the coil and the heat resistant tube cylinder.
Table 12-8 Technical parameters of heating furnace and reheating furnace
|Serial number||name||“Plus hot” furnace||” Reheat” furnace|
|1||Rated power of adjustable transformer /kVA||850||700|
|2||Transformer power supply voltage/V||6000||6000|
|3||Transformer secondary voltage/level||10||10|
|4||Sensor power /kW||750||600|
|5||Blank material||Magnetic and non-magnetic steel||Magnetic and non-magnetic steel|
|7||Maximum heating temperature /Y||1250||1250|
|9||Pressure of cooling water /Pa||3 X10 5||3 X10 5|
|10||Cooling water consumption/ (m 3 /h)||12||12|
Table 12-9 Relevant dimensions of the sensor (unit: mm)
|Billet diameter||Φ 214||Φ 254||Φ 293||Φ 336|
|Billet length||307 – 1000||307 – 1000||307 – 1000||307 – 1000|
|Coil inner diameter||Φ 282||Φ 323||Φ 368||Φ 412|
|Coil turns||73 turns||73 turns||68 turns||68 turns|
|Heat-resistant tube size||©231 / Φ 237||Φ 272/ Φ 278||Φ 13 0 / Φ 19 1||Φ 357/ Φ 363|
|Heat-resistant tube height||1490||1490||1490||1490|
|Protection tube size||Φ 241/ Φ 267||Φ 282/ Φ 308||Φ 323/ Φ 353||Φ 367/ Φ 97|