The purpose of the billet intermediate frequency induction heating furnace : used to heat carbon steel, alloy steel, ball bearing steel, including ferritic steel and austenitic steel, to the maximum extrusion temperature of 1250T . Billet "plus hot" furnace heated to 1250T 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 intermediate frequency 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 structure of the intermediate frequency induction heating furnace: The induction heating furnace is vertical and uses hydraulic transmission, which is convenient for automatic control.
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.
"Plus hot" and the furnace "re Technical Data heating" of the furnace are shown in Table 12-8 .
Table 12-8 Technical parameters of heating furnace and reheating furnace
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Serial number |
name |
"Plus hot" furnace |
" Reheat" furnace |
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1 |
Rated power of adjustable transformer /kV - A |
850 |
700 |
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2 |
Transformer power supply voltage /V |
6000 |
6000 |
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3 |
Transformer secondary voltage/level |
10 |
10 |
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4 |
Sensor power /kW |
750 |
600 |
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(Continued) |
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Serial number |
name |
"Plus hot" furnace |
" Reheat" furnace |
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5 |
Blank material |
Magnetic and non-magnetic steel |
Magnetic and non-magnetic steel |
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6 |
Sensor connection |
Simplex |
Simplex |
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7 |
Maximum heating temperature /Y |
1250 |
1250 |
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8 |
Sensor voltage /V |
600 |
600 |
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9 |
Pressure of cooling water /Pa |
3 X10 5 |
3 X10 5 |
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10 |
Cooling water consumption/ (m'/h) |
12. |
12 |
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The dimensions of the billet and the inductor of the heating furnace are shown in Table 12-9 .
Table 12-9 Relevant dimensions of the sensor (unit: mm)
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Sensor number |
A |
B |
C |
D |
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Billet diameter |
Towel 214 |
Towel 254 |
Towel 293 |
Towel 336 |
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Billet length |
307 ~1000 |
307 ~1000 |
307 ~ 1000 |
307 ~ 1000 |
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Coil inner diameter |
Towel 282 |
0323 |
368 |
Towel 412 |
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Coil turns |
73 turns |
73 turns |
68 turns |
68 turns |
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Coil height |
1250 |
1250 |
1250 |
1250 |
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Heat-resistant tube size |
©231 / Towel 237 |
Towel 272/ Towel 278 |
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