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 is the working principle of the suspension type resistance welding machine?: During the operation of the spot welding machine, the time control of the pressure, welding, maintenance and rest procedures is completed by the time regulator in the spot welder controller. The length of time required for each program and the size of the welding current (i.e., welding specification) shall be preset in accordance with the welding procedure.

Q:Comparison between medium frequency spot welder and common resistance welder: Characteristics of general resistance welding:1, due to low frequency, frequency (50HZ), the quality of welding instability.2, more spatter during welding.3, the welding quality is lack of effective data monitoring.4, excessive wear of electrodes.5, the power factor is low, and a large number of capacitor compensation cabinets are added to improve the power factor.6, excessive energy costs.7, AC welding two times, the impact of strong magnetic field on human health.Welding characteristics of medium frequency electric welding machine:1 、 adopting digital intermediate frequency welding controller, the quality of welding can be effectively controlled.2, welding process greatly reduces spatter, improve welding quality and purify welding environment.3, the integration of welding welding machine, suspension collocation.4 、 powerful welding function, providing welding quality analysis data and monitoring5 、 integrated modular design, welding control system performance is stable, high reliability, low welding failure rate.6, the use of electrode pressure reduction, greatly improve the electrode life.7 、 adopting three-phase balanced load and intermediate frequency welding technology, no need to add capacitance compensation cabinet.8, digital intermediate frequency welding, energy saving more than 30%, greatly reducing energy costs.9. Accurate control of welding parameters (1MS) for seamless welding of steel sheet / variable thickness steel plate / high strength steel plate / aluminum alloy.10, super small volume and weight of the welding transformer, meet the application and integration of the welding robot.11, HMI control, user-friendly operation programming software, convenient and quick.

Q:What are the characteristics of constant voltage operation mode of medium frequency resistance welding machine?: Advantages of intermediate frequency resistance welding machine:The power factor is extremely high (above 0.95), and the required power supply is saved by half compared with the AC resistance welder, and the three-phase balance of the power network is not influenced.Because of the direct current bunching effect and no zero crossing effect, the welding efficiency is improved and the required current is smaller. Therefore, the required cooling water is less, and the spatter is reduced, so that the electrode grinding cycle is lengthened correspondingly.If a transformer power frequency transformer size and weight can be reduced to one - to 1/3.The secondary loop is not affected by the ferromagnetism of the workpiece.There is no alternating electromagnetic force in the DC operation, so the electrode pressure is less.

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