Hitachi America, Ltd. R&D Division - Friction Stir Welding Friction Stir Welding Friction Stir Welding (FSW) is a solid state energy efficient joining technique with several advantages. HITSPIN TM Friction Stir Welding equipment developed by HITACHI, provides welding solutions for a wide range of applications. Operating Principle Process Advantages: 1. Solid State Welding Process No melting of base metal No loss of alloying element No fumes or spatter 2. Can easily weld 3D seam Butt, Lap, T-Joint etc. 3. Simple Process No shielding gas No consumables (filler wire) No surface treatment Unique features of FSW: Very low distortion No porosity or solidification cracking Weld region has a fine grain structure than the base metal Excellent Mechanical properties (strength, elongation, etc.)
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Hitachi America, Ltd. R&D Division - Friction Stir Welding
Friction Stir Welding
Friction Stir Welding (FSW) is a solidstate energy efficient joining techniquewith several advantages. HITSPINTM
Friction Stir Welding equipmentdeveloped by HITACHI, provides weldingsolutions for a wide range of applications.
Operating PrincipleProcess Advantages:
1. Solid State Welding ProcessNo melting of base metalNo loss of alloying elementNo fumes or spatter
2. Can easily weld3D seamButt, Lap, T-Joint etc.
3. Simple ProcessNo shielding gasNo consumables (filler wire)No surface treatment
Unique features of FSW:Very low distortionNo porosity or solidification crackingWeld region has a fine grain structurethan the base metal
Excellent Mechanical properties (strength,elongation, etc.)
Hitachi America, Ltd. R&D Division - Friction Stir Welding
Distortion Comparison after Welding
Comparison of Microstructure
Hitachi America, Ltd. R&D Division - Friction Stir Welding
Hitachi’s Machine Lineup
1 Dimensional Machine
2 Dimensional Machine
3 Dimensional Machine
4 Multi Dimensional Machine (Robotic)
Hitachi America, Ltd. R&D Division - Friction Stir Welding
Features of Hitachi Machines
• TWI FSW machine license• Standard and custom machines• Simple operation by CAD/CAM and
CNC• Tool tracking system• Self retracting machine head• Data acquisition system• Hitachi technical support
Applications• Automotive:
- Body, Panels, Chassis, Suspension,Powertrain- Structural and Electricalcomponents
Materials and Processes:• Aluminum, Steel, Magnesium,
Copper, etc.• Castings, Extrusions, Sheets, etc.• Dissimilar material thickness
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