Centre de soudage par friction-malaxage

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Friction Stir Welding Center

MISSION

The mission of Friction Stir Welding Center (CSFM-UQAC) is to allow access to the technology of friction stir welding to Canada SMEs by providing technical support for the manufacturing prototypes and small series marketable.

 

Target clientele 

Canada SMEs concerned by the development of aluminium products involving the friction stir welding technology.

SERVICES 

  •          Technical assistance to help businesses use the friction stir welding technology

  •          Technical assistance in project development

  •          Identifying and networking with the experts required (teachers, students and professionals)

 

Friction stir welding (FSW) 

The basic concept of FSW is remarkably simple.  A non-consumable rotating tool with a specially designed pin and shoulder is inserted into the abutting edges of sheets or plates to be joined and traversed along the line of joint. The tool serves two primary functions : (a) heating of workpiece, and (b) movement of material to produce the joint. The heating is accomplished by friction between the tool and the workpiece and plastic deformation workpiece. The localized heating softens the material around the pin and combination of tool rotation and translation leads to movement of materiel from the front of the pin to the back of the pin. As a result of this process a joint is produced in ‘’solid state’’(R.S Mishra and Z.Y Ma) .

FSW friction stir welding



Key benefits of friction stir welding

Metallurgical benefits

Environmental benefits

Energy benefits

Low distorsion workpiece No surface cleaning required Improved materials use allows reduction in weight
Solid phase process No shielding gas required Only 2,5 % of the energy needed for a laser weld
Good dimensional stability and repeatability Eliminate grinding wastes Decreased fuel consumption in light weight aircraft, automotive and ship applications
No loss of alloying elements Eliminate solvents required for degreasing  
Excellent metallurgical properties in the joint area    
Fine microstructures    
Absence of craking    
Replace multiple parts joined by fasteners    



Typical resistance of joints 

 

Friction stir welding (FSW) compared to arc welding wire electrode in an inert atmosphere (MIG)
Aluminium alloyultimate limit - As welded
MIG (MPa) FSW (MPa) FSW effiency (%)
Non-heau treatable 5083-H112 260 320 90-100
5454-H32 185 255 85
Heat treatable 2219-T81 241 283 63
6061-T6 186 254 75-80

 

 Available equipments at CSFM-UQAC

Welding gantry

Description of the welding equipment
Equipment manufactured by MTI (Manufacturing Technology inc.)
GEOMETRIC CHARACTERISTICS OF WELD
Maximum thickness in one operation 15 mm (6061-T6)
Lenght (x) 18 m
Widht (y) 3,5 m
Height (z) 1 m

Possible rotation axis y

Possible rotation axis z

Possibility to weld 3D geometries

100 degrees

360 degrees

 

welding parameter

Maximum speed (x and y)

6 m/min

Positioning accuracy

≤ 0,16 mm

OTHER TECHNICAL CARACTERISTICS

- Monitoring by laser joint

- Deburring system

- Measurement and recording of welding parameters (strenght, position, temperature)

- Double head welding (can weld both at the same time)

 FSW friction stir welding

Welding robot cell

DESCRIPTION OF THE EQUIPMENT
Fanuc M900ia robot with welding head instrumented, manufactured by Centre de recherche industrielle du Québec (CRIQ)
GEOMETRICAL CHARACTERISTICS OF WELDS
Maximum thickness in one operation  6 mm (6061-T6)
Radius of action  2,8 m

Number of axis

Possibility to weld 3D geometries

 6 axes

WELDING PARAMETER

Maximum speed (x and y)

2m/min

Positioning accuracy

1mm

OTHER TECHNICAL CHARACTERISTICS

- Measurement and recording of welding parameters (strenght, position, temperature)


FSW friction stir welding     

 

To submit a project

To submit a project the company must complete the submission form project. All applications will be reviewed by a selection committee that will ensure their relevance and feasibility.

 

Two ways to obtain this submission form :

- Call the 418 545-5011 poste 5308

To obtain the form, click here

 

For question or information

Alexandre Lavoie
Project manager

Centre d'entrepreneuriat et d'essaimage
de l'Université du Québec à Chicoutimi
555, boulevard de l'Université
Chicoutimi (QC) G7H 2B1

418 545-5011, poste 5308

 csfmuqac@uqac.ca

Télécopieur : 418 545-5041