PTA Equipment

Starweld™ 400A Plasma Transferred Arc Welding System

This system can control external linear and rotary motion devices such as positioners, carriages and oscillator and arc length control to provide fully automatic weld sequences such as:

Circular step over: In this mode diameters can be hardfaced in a series of passes or beads. After each pass, the torch is moved over to a predetermined position when the next bead is started. The step over distance, speed and number of steps are programmable.

Spiral welding: This is another method of hardfacing on a diameter where the rotational speed and torch movement is coordinated to achieve coverage in the form of a continuous spiral.

Linear welding: One or more linear beads can be programmed to achieve straight line beads. The X and Y axis can also be coordinated to provide square or rectangular welding patterns.

System Components:

Programmable controller and motor control boards.
Transistorized transferred arc power supply.
Transistorized pilot arc power supply.
Arc voltage and amperage digital displays.
Welding current variable from 10 to 300 amps at 100% duty cycle.
Pilot arc current variable from 5 to 50 amps.
Rotameters for controlling Center, Powder, and Shield Gas flows.

Gas control range

Center (plasma) gas 0.45 – 4.5 lit / min
Powder gas 0.45 – 4.5 lit / min
Shield gas 2.6 - 26 lit / min

Stand alone refrigerated water chiller. Cooling capacity is 15,000 BTU/hr. This chiller requires a separate 230 VAC, 17 A, 1ø, 60Hz electrical circuit to operate. It is not powered via the weld console.

Starweld™ 400R Plasma Transferred Arc Welding System

The 400R is designed for interfacing to external systems that provide torch motion and automation. The interface will consist of two contact closures from the motion system, one for weld start and one for powder start, and one contact closure from the weld console to tell the system that the transferred arc is on. A 0 – 10 VDC signal from the external system can be used for current control if required.

System Components:

STARWELD™ power supply console.

Programmable controller and motor control boards.
Transistorized transferred arc power supply.
Transistorized pilot arc power supply.
Arc voltage and amperage digital displays.
Welding current variable from 10 to 300 amps at 100% duty cycle.
Pilot arc current variable from 5 to 50 amps.
Rotameters for controlling Center, Powder, and Shield Gas flows.

Gas control range

Center (plasma) gas 0.45 – 4.5 lit / min
Powder gas 0.45 – 4.5 lit / min
Shield gas 2.6 - 26 lit / min

Stand alone refrigerated water chiller. Cooling capacity is 15,000 BTU/hr. This chiller requires a separate 230 VAC, 17 A, 1ø, 60Hz electrical circuit to operate. It is not powered via the weld console.

Starweld™ Valvestar II Plasma Transferred Arc Welding System

The Valve STAR II installation is designed for the automatic PTA hardfacing of automotive engine valves. The valves are introduced into the welding area via a gravity chute. The valves are separated, aligned and placed onto the rotary table by the handling system. The torch movement is manually adjusted in three axis and is pneumatically raised and lowered to facilitate loading of the valve on the rotary table.

The valves are clamped pneumatically onto the water cooled rotary table. After welding the valves are fed into a collection area

System Description:

1 set PTA power source STARWELD PTA 202 CONTROL
1 set powder feeding system PR-S 5
1 set PTA torch Model 600
1 set refrigerating unit LT 05.3-2 for cooling the PTA torch and rotary table
1 set valve handling system
Complete welding cycle control
Electrical and pneumatic cables and hoses