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TIG Welding Machine

TIG Welding Machine

WB-A350P AC/DC Pulse

OTC DAIHEN A350P Digital Inverter AC/DC Pulse TIG Welder

The A350P is a fully digital AC/DC pulse TIG welder from OTC DAIHEN, featuring Welbee inverter technology. It delivers high-quality welding from ultra-thin to medium plates, with an AC frequency up to 500Hz for high-efficiency TIG welding. The built‑in welding guide function automatically matches welding conditions, and a digital interface box facilitates integration with automated systems. Rich internal functions accommodate various special process requirements, making it ideal for demanding applications.

✨ Key Technology Advantages

  • Welbee full digital inverter technology — Precise arc control for a wide thickness range.

  • 500Hz AC frequency — High duty cycle for efficient TIG welding.

  • Welding guide function — Automatically matches welding conditions, simplifying setup.

  • Digital interface box support — Easy integration with automation equipment.

  • Rich internal functions — Cleaning width adjustment, AC-DC switching, etc.

  • 100 job memory — Secure parameter storage, easy management.

  • Multiple welding modes — AC TIG, DC TIG, AC stick, DC stick in one machine.

🔧 Primary Applications

Aerospace, rail transportation, precision instruments, chemical vessels, mold making – TIG welding of aluminum alloys, magnesium alloys, titanium alloys, stainless steel, copper, and alloy steels.

📊 OTC DAIHEN A350P Technical Specifications

* Refer to official OTC DAIHEN datasheet for full details.
Series NameWelbee Inverter A350P
Power SourceModelWB-A350P
Rated Input Voltage380V
Phases/3-phase
Rated FrequencyHz50/60
Rated Output Current (A)AAC TIGDC TIGAC StickDC Stick
350350250250
Rated Power (kVA)kVA12.2 (10.2kW)12.3 (10.8kW)15.6 (10.2kW)10.5 (9.1kW)

Max. No‑Load VoltageV70/77
Rated Duty Cycle%40
Rated Load Voltage (V)V24243030

Output Current Range (A)A5-3502-35010-25010-250
5-250 (soft arc mode)
Pre‑flow Timesec0-99/
Post‑flow Timesec0-99/
Up‑slope Timesec0-10/
Down‑slope Timesec0-10/
Pulse FrequencyHz0.1-999/
Pulse Width%50 (5-95% settable in F function)/
AC FrequencyHz30-500/50 or 60/
Cleaning Width Adjustment%-20~20 (electrode positive ratio 10-50%)/
AC-DC Switching FrequencyHz0.1-50/
Automatic Crater Control
[On][Off][Repeat] selectable/
Spot Weld Timesec0.1~10/
Weld Condition Memory
100
Dimensions (W×D×H)mm395×710×640 (without eyebolt)
Weightkg56
Arc Starting Method
HF start / Touch start/

🛒 Genuine OTC DAIHEN Parts · Professional Support

We are an authorized distributor of OTC DAIHEN welding equipment, supplying genuine machines and spare parts. For inquiries about the A350P or any OTC parts, please contact us:

📞 Tel / WeChat / WhatsApp: +86 180-9663-1656

📧 Email: ahojotc@gmail.com
           Over 10 years in welding automation — 7×12 hours online, add our WeChat for technical exchange.