Sucker rod surface quenching

1) Workpiece specifications and sensor configuration

A total of 3 sets of quenching inductors are required . The heating range of the workpiece is 16-32mm . The quenching part uses super audio frequency power, the power is 250KW , and the frequency is designed at 10-30KHz to ensure uniform heating.

Serial number	Specification	Range ( mm )	Length (m)	Adaptation sensor
1	Φ 16- Φ 19	16-19	8-11	GTR-19
2	Φ 22- Φ 25	22-25	8-11	GTR-25
3	Φ 28.6- Φ 32	28.6-32	8-11	GTR-32

2) Process flow description

First, manually place the required workpiece (sucker rod) on the feeding storage rack (usually hoisted to the top by a crane), the storage rack is equipped with an integral turning mechanism, and the turning mechanism will be adjusted according to the set beat (time). The material is turned to the feeding conveyor, and then the feeding drives the bar material forward, and the material is sent to the quenching heating inductor. Then the workpiece is heated by the quenching heating part. After rapid heating, the workpiece (workpiece rotation) is driven by the inclined roller to pass through the quenching water spray ring for spray quenching. The entire quenching area is covered by a transparent protective cover.
3) Equipment parameter description

project	250Kw quenching equipment
Power supply model	CYP/IGBT-250
Rated power ( Kw )	250
Nominal frequency ( KHz )	10-30
Input voltage ( V )	380
Input current (A)	410
DC current ( A )	500
Heating temperature	900 ℃± 10 ℃ ( Quenching temperature is 870 ℃± 10 ℃ )
Transformer capacity ( Kva )	≥ 315Kva
Design output of production line	Design according to φ 25 , 4m/min
Remark	The material is in accordance with 20CrMo , and the quenching water spray pressure requires a spray pressure of 1.5-3 kg / cm. The effective quenching depth is calculated as 8%-13% of the diameter .