LASER WELDING PUTS STEEL PISTONS IN CAR DIESEL ENGINES
Moving Optics
Smart DeflectorsTM Application Adaptable Laser Beam Steering
Smart DeflectorTM can be fitted with 10, 15, 20 and 30 mm aperture mirrors Fully integrated rotational servo system Available angular ranges: 800, 640, 180 mrad Single coaxial SDP (Shared Data Power) connection 20 bit set point control Low drift (typical 12µrad/8 hours) Low temperature coefficient (typical 25 ppm/°K) Patented moving coil drive with low inductance for superior speed Fully digital H-bridge for single supply (12VDC) operation at maximum efficiency Spring preloaded hybrid bearing system for long life time Field replaceable mirrors and auto tune support
Evolution co-financed by IWT-Vlaanderen (SME-Innovation project)
CUA32 control card Probably the highest value 6-axis controller in the world
Mahle, a development partner and supplier to the automotive industry, has developed a new production process involving laser welding that will enable steel pistons to be used in the diesel engines of cars. The new production technology
solves a problem that Mahle says has existed since the invention of the cooled piston itself: ‘Thick [piston gallery] walls have poor heat dissipation and produce high temperatures at the bowl rim,’ the company said in its announcement of the process. ‘On the other hand, thin walls can lead to undesired high temperatures at the inner wall of the piston gallery, causing a layer of oil carbon to form. This acts as a thermal insulator and promotes – due to excessive operating temperatures – undesired wear and damage to the piston and cylinder liner.’ These issues can be addressed
using a piston gallery with a kidney-shaped cross section, which guides the flow of cooling oil in an optimal hydraulic path, and ensures
a uniform dissipation of heat that makes overheating impossible. Such a design is only feasible, however, using the laser welding process developed by Mahle, which enables maximum design freedom for the piston gallery. Typically, friction welding is used to produce pistons, however the resulting material build-up in the cooling channel hinders controlled guidance of the cooling oil flow. The kidney-shaped cross section
will enable steel pistons to be used in the diesel engines of a passenger car in place of currently used aluminium pistons, the standard for powerful diesel engines, which will lower the fuel consumption and reduce the CO2
emissions of the
vehicle. This is due to the lower expansion
of steel compared to aluminium, which has a positive effect on frictional losses, and ultimately reduces oil entry into the combustion area of the engine – leading to lower particle emissions.
www.lasersystemseurope.com | @lasersystemsmag
6-axis numerical control system Steers up to 3 Smart DeflectorsTM and up to 3 stepper drivers Full 3D hybrid marking support Controls up to 17 digital and 4 analog IO’s Direct AC (110-240 V) or DC (24-48V) power connection Up to 8 systems can be interconnected as master/slave USB and Ethernet for host connection Ethernet, CAN and UART for system integration DIN rail mountable Modular internal construction for easy customization Application interface through G-code or DLL Configuration software for activation of advanced features
Evolution co-financed by the European Union
Newson NV
www.newson.be
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36
