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Czech Technical University in
Prague
Faculty of Mechanical Engineering
Department of Manufacturing Technology
Head: Doc. Ing. J. Suchánek, CSc.
Vice-head: Doc. Ing. R. Dvořák, CSc.
Manager: Ing. B. Bednář, CSc.
Secretary: M. Maříková
Phone: +420 224 352 629
+420 224 352 632
E-mail: [email protected]
URL: http://u12123.fsid.cvut.cz
Division of: Forming Casting Welding Surface Treatment Machining
Metrology Process and Systems Planning
• Advanced technologies and materials used in metal forming
• Testing of formability in sheet metal forming (FLD curves)
• Die design in closed die forging
• Research of tool wear in forging
• Computer aided techniques used in metal forming
• Numerical simulation of metal forming processes
Forming
Division of: Forming Casting Welding Surface Treatment Machining
Metrology Process and Systems Planning
Casting
• Casting and casting process design
• Numerical simulation of casting processes
• Analysis of high pressure casting technology
• Relationship among chemical composition, structure, and properties of metals
• Study of ductile iron properties
• Research of investment casting
Division of: Forming Casting Welding Surface Treatment Machining
Metrology Process and Systems Planning
• Welding, cutting and marking (gas, arc, plasma and laser welding techniques)
• Soldering and brazing
• Weld cladding
• Measurement of weldments defects
The versatile laser system for welding,
Welding
cutting, drilling, and hardening
GSI Lumonics - JK701H
Specifications:
- Wavelength: 1064 nm
- Maximum mean power: 550 W
- Maximum pulse energy: 70 J
- Maximum peak power: 7.0 kW
- Pulse width range: 0.5 msec to >50 msec
- Repetition rate: 0.2 to 500 Hz
- Focusing distance: 80, 133, 200 mm
- Movement speed: 10 – 50 m/min
- Rotation speed: 96 min-1
- Max. movement: X 600, Y 400, Z 400 mm
Welding up to 2.5mm penetration of steel
Welding with speeds up to 2.5m/minute
Cutting up to 4m/minute
Cutting and drilling up to 10mm in depth
Cutting and drilling with kerf widths or
hole diameters down to 100 microns
Division of: Forming Casting Welding Surface Treatment Machining
Metrology Process and Systems Planning
• Research of functional coatings (organic and inorganic)
• Optimization of cleaning processes
• Conversion coatings on stainless steels
• Anodic oxidation
• Legislative of surface engineering in EU
• Advanced surface finishing methods
• Determination of tribology characteristics of surface coatings
• Device for detection of surface cleanliness.
Surface Treatment
Tribometer TOP 3
Sample of measurement grease thickness
by the impulse fluorescent method on
coin relief.
Division of: Forming Casting Welding Surface Treatment Machining
Metrology Process and Systems Planning
Machining
• Testing of machinability
• Testing of cutting ability
• Measurement of cutting parameters
• Testing of CAM systems
• Testing of machining on CNC machines
Division of: Forming Casting Welding Surface Treatment Machining
Metrology Process and Systems Planning
Metrology
• Quality control
• Complex quality of production
• Systems of quality control
• Mechanical engineering metrology
• Special methods of measuring
• Technical standardisation
Division of: Forming Casting Welding Surface Treatment Machining
Metrology Process and Systems Planning
Process and Systems Planning
• Machining and assembly processes planning
• Rationalization of production (lean production system)
• Production systems planning and logistics (analysis of material´s flows)
• Work analysis
• Time and motions studies (MTM-1 and MTM-2 methods)
• Automation of engineering works, computer aided techniques (CAE, CIM,…)
• Evaluation methodology for the recycling process planning
Research trends in Mg alloys manufacturing
Main domains Casting Forming Welding Tribology
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Casting processes
Forming and Formability
Welding and Weldability
Tribology problems
Materials properties
CTU research project VZ 6840770007 “Research of Advanced
Materials Processing for Engineering Industry” supported by the
special CTU Rector’s office fund
Research trends in Mg alloys manufacturing
Main domains Casting Forming Welding Tribology
• Building of experimental workplace for melting Mg alloys
• Establishing of High-pressure Die-casting Centre in the Czech Republic
in cooperation with BEZ Motory, Hradec Kralove, KOVOLIT, Modrice
• Research in material composition, metallurgy, casting methods, heat
treatment, shielding gasses, …
• Simulations of gravity sand casting
Research - Casting
Casting of test samples for other
branches (stakes, tablets, castings
with different wall thickness, …)
Research trends in Mg alloys manufacturing
Main domains Casting Forming Welding Tribology
• 4% Mg alloys are used in forming processes
• Formability is limited due to the hexagonal closed-packed crystal structure
• The forming temperature range is 200-400°C.
• Manufacturing methods
Rolling
Extrusion processes
Forging
Sheet forming
Thixoforming
• Future goals:
 Experimental hot forging of casting preforms
 Optimisation of technological processes parameters
Research - Forming
Research trends in Mg alloys manufacturing
Main domains Casting Forming Welding Tribology
• Welding technologies used for Mg alloys processing:
 Gas Metal Arc Welding (GMAW)
 Gas Tungsten Arc Welding (GTAW)
 Resistance Spot Welding (RSW)
 Laser Beam Welding (LBM)
 Plasma Cutting
 Laser Cutting
• Main research fields:
 Welding and cutting
 Repairing and renovation
 Laser marking
• Welding testing methods:
Laser system with Nd:YAG laser JK
 Weld macrographs and micrographs
701H from Coherent
 Non destructive testing
 Destructive testing
Research - Welding
Research trends in Mg alloys manufacturing
Main domains Casting Forming Welding Tribology
• Fabrication of surfaces with extreme low friction coefficient
• Fabrication of surfaces with high degree of wear resistance
• Surfaces renovation
• Processing of highly resistant layers with tribological properties suitable for
extreme conditions in manufacturing engineering without dismounting.
Research - Tribology
Metaloceramics layer
Piston
Piston rings
Cylinder
Reaction on surface and
detail RVS layer