Arc Welding Process - MIG Welding
Gas Metal Arc Welding (GMAW) is frequently referred to as MIG welding. MIG welding is a commonly used high deposition rate welding process. Wire is continuously fed from a spool. MIG welding is therefore referred to as a semiautomatic welding process.
MIG Welding Benefits
All position capability. Higher deposition rates that SMAW. Less operator skill required. Long welds can be made without starts or stops. Minimal post weld cleaning is required.
Mig Welding Shielding Gas
The shielding gas forms the arc plasma, stabilizes the arc on the metal being welded, shields the arc and molten weld pool, and allows smooth transfer of metal from the weld wire pool. There are three primary metal transfer modes: Spray transfer, Globular transfer, and Short circuiting transfer. The primary shielding gasses used are: Argon, Argon-1 to 5% Oxygen, Argon-3 to 25% CO2, and Argon/Helium. CO2 is also used in its pure form in some mig welding processed. However, in some applications the presence of CO2 in the shielding gas may adversely affect the mechanical properties of the weld.
Common MIG Welding Concerns
Weld discontinuities. Undercutting. Excessive melt-through. Incomplete fusion. Incomplete joint penetration. Porosity. Weld metal cracks.
MIG Welding Problems
Heavily oxidized weld deposit. Irregular wire feed. Burnback. Porosity. Unstable arc. Difficult arc starting.
When it comes to complex applications like welding in multiple planes, the Motoman ArcWorld 6000 has an expert and simplified approach. Easy to operate and customize, this pre-engineered workcell is created for quick, exact production.
This workcell is available with either one robot (AW6000) or two (AW6200). It includes UP arc welding robots, XRC 2001 controllers, and multiple safety features. Parts are brought to the right place with a Ferris wheel style positioner.
The Motoman ArcWorld 6000 cells meet every ANSI/RIA R15.06-1999 rule. No need to worry about safety with the ArcWorld's curtains, safety partitions, locks, and unified operator station.
Motoman Arworld 6000 Standard Specifications:
* UP6 Robot
* 6kg (13.2lb.) payload
* In-line, 6-axis, articulated design
* 1,373 mm (54.06") reach at P-point
XRC 2001 Controller:
* Integrated welding package
* Programming pendant with single point of control
* Direct input of welding parameters
* Menu-driven arc welding application software
* Arc restart and retry capabilities
* Dynamic edit
* Software weaving
* AC digital servo drives
* Distributed RISC architecture
Operator Control Station:
* Servo ON
* Master Job Start
* E-Stop
* Robot Hold
* Alarm reset
* Single push button cycle index (latching relay interlocked for safety)
Welding Package:
* Motoman air-cooled torch
* Miller arm-mounted 4-roll wire feeder
* Motoman XYZ-compliant torch breakaway
* Miller Auto DeltaWeld welding power source
* Built-in welding interface
* Easy setup common programming platform
MRM2-250SX Part Positioner:
* 250kg (551.3lb) payload capacity per side
* AC servo motor driven
* Patented single motor drive
* 4-second index time
* 2,600 mm (102.4") max. part length
* 950mm (37.4") max. part diameter
* 994mm (39.1") load height
Total Safety Environment:
* Safety-rated, tamper-resistant interlocks
* Single point of operator control (AW1000 & AW1200)
* Barrier guarding with protective arc curtains
* Cycle start button interlocked w/safeguards
* Dust-channel light curtains. Total safety environment in compliance with ANSI/RIA R.15.06-1999 safety standards
Configuration Options:
* UP20 robot
o 20kg (44.1 lb.) payload
o 1,658 mm (65.3") reach
* UP20-6 robot
o 6kg (13.2lb.) payload
o 1,885 mm (74.2") reach
* Additional UP6 robot controller
* Without programming bases (AWII-6000)
* MRM2-500SX part positioner (AWII-6000HD)
o 500 kg per side
o 750kg (1,653.8lb)
o 4-sec index time
o 3000mm (118.11") std. part length
o 1,200 mm (47.2") max. part diameter
Welding Options:
* Process monitoring
* PanelView operator panel
* ToolSight
* MotoCal
* Optional power sources
* GTAW, plasma, and aluminum welding packages
