Contoured Wave AC High Capacity Feed Head Increased Deposition Rate Simple to Use > Standard Hot Wire System Custom-designed Torch Dual-Axis Wire Positioner > Contoured-Wave Hot Wire Power Supply This unique power supply is manufactured by Jet- line Engineering specifically for the hot wire pro- cess. The system features a contoured-wave, AC output. Experience has shown that the use of an AC power supply enhances the hot wire deposition and reduces arc-blow problems experienced with conventional hot wire systems using DC hot wire power.The output of the power supply is controlled using asolid-state control module. This module contours the AC waveform to create one which closely simulates a sine wave. The use of sinusoidal AC voltage greatly improves the flow of the hot wire into the weld pool. Frequency is adjustable from 50 to 200 Hz. This waveform permits higher wire feed speeds and currents leading to increased deposi- tion rates and welding speeds.The power supply provides up to 200 amps of hotwire current at voltages which are adjustable from 2 to 10 VAC. The voltage is regulated by a poten- tiometer on the hot wire power control or may be controlled by a remote 0 to 10 VDC signal. Meters are provided to indicate hot wire voltage and current, and a gas purge button is supplied. Introduction The hot wire process is used in applications where ahigh deposition of the filler wire is desired. The process is used primarily with the GTAW (TIG) or the PAW (Plasma) welding process.Hot wire welding provides deposition rates morenormally associated with the GMAW (MIG) welding process but with the added advantages offered by GTAW (TIG) and PAW (Plasma) welding.These advantages include better control of theheat input because the welding current is indepen- dent of the wire feed speed. This leads to reduced dilution in overlay welds and better side wall fusion in deep groove welds. Description A complete Jetline hot wire system consists of:Contoured-wave hot wire power supplyHot wire power control Heavy-duty wire drive unit Wire feed speed control Hot wire torch Hot wire torch positioner assemblyThe hot wire system is supplied as a completelyintegrated package with all the necessary inter- connecting cables and hoses. The system has universal fittings to allow it to fit on any GTAW (TIG) or PAW (Plasma) torch and is supplied in a "ready- to-weld" condition. Heavy-Duty Wire Drive Unit The wire drive unit consists of a four-roll feedhead driven by a high capacity, DC motor. The wire drive unit is mounted on a base which also supports the wire reel holder. A wire straightener is supplied as standard with the system.The wire feed speed is regulated by the 9629HWmicroprocessor control and is adjustable from 10 to 600 IPM (25 to 1,525 cm/min). This control permits wire inching, wire speed ramp up at the start and wire retract at the end of the weld. 15 Goodyear St, Irvine, California, 92618 U.S.A. Tel: (949) 951-1515 Օ Fax: (949) 951-9237 size="-2">

The hot wire torch is designed to guide the wire intothe weld pool and to conduct the AC hot wire current to it. The torch includes gas shielding; this serves to protect the heated wire as it enters the weld pool. The torch is rated at 200 amps AC. The hot wire process is used for applications which have high quality requirements such as are found in the fabrication of pressure vessels and parts for the nuclear industry. Welds of this nature are generally radiographed, ultrasonically inspected or liquid penetrant checked. Applications include thicker, multi-pass welds in " (6 mm) and thicker...