GGP250KW solid state HF steel tube welder

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: -

Supply Capability:: 30 sets set/month

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1. Applied Range

Steel pipe specification: φ45~φ89mm

Steel pipe thickness: 1.5~4.0mm

Welding pipe type: Round pipe/square pipe/rectangular pipe

Welding mode: Induction welding

Typical welding speed: 30~100m/min

2. Main Technical Index of 250kW Solid State H.F. Welder

( 1 )Designed parameters

Nominal power: 250kW

Rated DC power: Pd=300kW

Rated DC voltage: UdN=450V

Rated DC current: IdN=670A

The whole efficiency: η≥85%

Output power: Pout > 250kW

Designed frequency: f=300~350kHz

MOSFET inverter: 60kW×5

Tank circuit output mode: no welding transformer output, secondary resonance

( 3 ) Power distribution requirements

Nominal power: 250kW

Rated DC power: Pd=300kW

Line-in power factor: COSφ≥0.85

Power distribution capacity: S≤350kVA

Power supply voltage: 3-phase 380V/50Hz

Line-in current: I=540A

Line-in cable: each phase adopts 240mm² copper cable, 3-phase 4-line

(3 ) 250kW:

With the adoption of water-water heat exchanger

Pressure of inner circulation water: 0.15~0.25MPa

Flow of inner circulation water: 21m³/h

Temperature of inner circulation out water: ≤40°C

Temperature of inner circulation back water: ≤55°C

Heat exchanger area: 12m²

Flow of external circulation water: 25m³/h(provided by user)

Temperature of external circulation inlet water: ≤35°C

Temperature rise of heat exchanger external circulation water: ≤15°C

Pressure of inlet water: 0.25~0.3MPa (approximately 2.5~3kg/cm²)

Volume for external circulation water pool: ≥25m³(provided by user)

Q:What are the characteristics of constant voltage operation mode of medium frequency resistance welding machine?: If the frequency sampling rate is high (usually minimum adjustment cycle 0.25ms~1ms), it is easy to control the welding process accurately and flexibly.The control modes of medium frequency direct current resistance welding machine include constant current control mode, constant voltage control mode and constant power mode, and some products have fixed pulse width control mode.Constant voltage mode features: constant voltage, less current in the second half. The reason is that when the workpiece is heated, the resistance increases, so that the current decreases. The aim of the model is to keep the joint temperature stable rather than increasing.

Q:What is the working principle of the suspension type resistance welding machine?: The workpiece welding end welding procedures after the transformer primary coil power, welding machine into "maintenance" program, the pressure to be maintained for a period of time, the solenoid valve opens, releasing the workpiece holder, welding machine into the "rest" program. A welding cycle has been completed at this time.

Q:Comparison between medium frequency spot welder and common resistance welder: Welding faces the challenge of high strength steel plates.Welding process of galvanized steel sheet and multilayer steel plate.Application of aluminum alloy sheet material.The widespread use of automatic flexible production line for welding robot.Continuously reduce energy costs, quality costs, and maintenance costs.

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