1. Basic Matching Technical Q&A (On-site Selection & Commissioning)
Q1: What type of power supply is standard for long rod induction heat treatment and melting? Why not high-frequency type?
A (Forever Technical Team): We adopt parallel resonant IGBT medium-frequency melting power supply (500Hz–10kHz) as standard configuration. Long bars have large solid cross-section; medium frequency can form uniform eddy current penetration, balance surface and core temperature difference, realize one-time full through heating and stable melting. High frequency is only for thin-wall surface heating, serious core cold defect, completely unable to meet long bar mass production and melting process requirements.
Q2: How to quickly match power and frequency according to bar diameter on site?
A (Forever Technical Team): On-site one-click matching standard, no complex calculation: ① Below Φ50 small bar: 3–10kHz, matched power 160–250kW; ② Φ50–150 medium bar: 1–3kHz, matched power 250–800kW; ③ Φ150–300 large bar / alloy melting: 500–1000Hz, matched power 800–3000kW. Forever power supply supports one-key frequency conversion adaptive matching, no need to replace hardware.
Q3: What is the standard supporting configuration of Forever complete machine set?
A (Forever Technical Team): Full set industrial standard package: digital intelligent melting main power supply +
closed circulating water cooling system induction coil + high-precision resonant capacitor bank + impedance matching integrated transformer + closed constant-pressure circulating water cooling system + PLC automatic feeding & rotating linkage mechanism + infrared real-time temperature closed-loop system. Plug and play, direct production after wiring and water connection.
2. On-site Heating & Melting Defect Troubleshooting Q&A
Q4: Long rod heating out of tolerance: surface overheating burnt, core not heated through, low yield?
Core causes: Mismatched high frequency, eccentric coil gap, unstable stepping feeding speed, insufficient effective heating length of coil.
Forever Standard Solution: Reduce working frequency to increase penetration depth; calibrate coil concentricity, keep uniform gap 5–10mm; switch to servo variable-frequency synchronous feeding system; extend coil effective heating area to 1.2 times of rod heating section. After adjustment, full rod temperature deviation controlled within ±15℃, no local overheating.
Q5: Melting production slow, power can not run up, low hourly output, high electricity consumption?
Core causes: Power supply and load coil not in resonant state, low power factor, unreasonable coil turns, poor heat dissipation leading to power limiting protection.
Forever Standard Solution: On-site calibrate capacitor and coil impedance resonance matching, power factor raised above 0.95; optimize internal winding turns of melting coil to reduce reactive loss; upgrade Forever special high-efficiency radiator, eliminate temperature-induced power limiting. The same power, melting efficiency increased by 12–18%.
Q6: After quenching and tempering, long bar deformed seriously, uneven hardness, unqualified mechanical performance?
Core causes: Disordered temperature zone of single-section coil, uneven quenching water pressure, bar no synchronous rotation, tempering heat fluctuation.
Forever Standard Solution: Adopt Forever multi-section zoning independent temperature control power supply; equip annular uniform-pressure quenching water distribution system; match synchronous rotating bracket to ensure uniform cooling all around; constant-temperature constant-power tempering locking program. Steady hardness, minimal straightness deformation.
3. Power Supply Failure & Daily Maintenance Q&A (Factory After-sales)
Q7: Induction melting power supply often over-current trips, hard to start, alarm randomly?
A (Forever Technical Team): Common hidden dangers: coil inter-turn insulation aging breakdown, water flow insufficient pressure drop, dust accumulation in power cabinet, IGBT drive parameter drift. Processing method: power-off insulation withstand voltage test for coil; clean water pipeline filter, guarantee water pressure 0.2–0.4MPa, inlet water below 30℃; blow dust inside cabinet regularly; one-key reset of Forever digital drive parameters. Quick recovery without parts replacement in most cases.
Q8: How to extend the service life of melting power supply and reduce downtime maintenance?
A (Forever Technical Team): Three key daily maintenance rules exclusive to Forever equipment: ① Keep the power supply room ventilated, dust-proof and rain-proof, no corrosive gas; ② Do not run without water or overload for a long time, check water quality and water tank scale every week; ③ Regularly tighten copper bar connection terminals every month to avoid virtual heating and burning. Standard service life up to 8–10 years, ultra-low failure rate.
Q9: Can Forever power supply be connected to automatic production line? Is remote after-sales supported?
A (Forever Technical Team): Yes. All Forever long bar induction heat treatment and melting power supplies reserve industrial Ethernet and analog signal interfaces, seamlessly docking with full-automatic feeding, sorting, cooling and finishing production lines. Support global remote fault diagnosis, remote parameter debugging, 24/7 overseas online technical support, on-site door-to-door service arranged for key projects.
long bar & rod induction quenching and tempering production line
4. Forever Electromechanical Core Advantage Remarks
1. Special medium-frequency melting power supply for long rods, heavy-duty design, anti-interference, stable continuous operation;
2. One-stop whole-line solution: heating, heat treatment, melting, cooling, automation integration;
3. Free on-site parameter matching, free process trial heating, long-term spare parts guarantee;
4. Customized non-standard coil and power supply for special alloy and super-large diameter bars.
