SHOW PREVIEW: PHOTONICS WEST
developed at LZH, provides various amounts of energy input per unit length and various preheating temperatures. LZH has developed a reproducible process for all configurations of preheating and welding, and the welding seams exhibit excellent quality. LZH has also carried out investigations into
the influence of the inductive power and the energy per unit length on the hardness of the steel. By using an optimum parameter regarding energy per unit length and inductive power, the hardness in the heat-affected zone (HAZ) decreases from 450HV without inductive power to 380HV with inductive power of 40kW. In the melting zone, the hardness decreases from 450HV to 335HV. By optimising the process parameters, it is possible to reduce the hardness in HAZ by 16 per cent and in the melting zone by 26 per cent. Other applications examined by LZH include
developed a reproducible process for all configurations of preheating and welding
LZH has
welding of large steel-aluminium foam sandwiches, with an overall thickness of 20mm, for lightweight shipbuilding, as well as high-rate deposition-welding. For the latter, LZH has developed a novel metal deposition process which uses an innovative electrical arc system with a precisely controlled laser. Te metal deposition process can be used for cladding and hard-facing, and combines high deposition rates with minimal heat input and low dilution. To achieve this goal the arc burns between two consumable wire-electrodes, which provides the deposition material. Te advantage of this approach is that the arc energy is used effectively for melting the wires, but is not transferred to the workpiece reducing its heating and any negative influences like thermal stress and high dilution. Te laser is used to ensure a sound bond of the coating and the substrate and also to control the meld-flow on the workpiece. First results show the general feasibility of this approach.
Presentation
High-power laser materials processing: lasers, beam delivery, diagnostics, and applications
SESSION 1: Laser beam welding l Tuesday 4 February 2014, 8:20am-10:10am
MAKING TRACKS TO PHOTONICS WEST
The full breadth of photonics technologies will be on show from 1 to 6 February 2014 in San Francisco, USA, both on the exhibition floor and in the accompanying conference programme. Here is a sneak preview of what visitors can expect to see
ATTOCUBE will be exhibiting its industrial line positioning units and the displacement sensor FPS3010. The industrial line piezo stages are
precise positioning units which can be used to position optical or mechanical components in the nanometre regime. Thanks to their modular design, individual stages can be stacked to form multi-axes stage
sliding the filter with respect to the incident light, while maintaining deep blocking throughout the whole tuning range. Other LVFs offered by Delta
include short- and long-pass filters, dichroic filters, a UV band pass filter, a visible band pass filter, and a linear variable order sorting filter.
www.madebydelta.com
LASER COMPONENTS will show attendees its new class of photodiode sensors that can serve as the building blocks of intelligent networks. The InGaAs photodiode sensors are plug-and-play. The company also offers the
combinations with up to six axes. The states provide maximum travel ranges of up to 100mm with 1nm resolution and 50nm repeatability. Attocube’s fibre-based
interferometric displacement sensor, FPS3010, is ideal for highly sensitive measurement tasks in many challenging applications. The sensor system offers picometre resolution and can also be used to measure vibrations and angular variations.
www.attocube.com
DELTA will be exhibiting its new linear variable NIR band pass filter which extends the application range of linear variable filters (LVF). The filters will offer tuneable edge wavelength and bandwidth while reducing cost and complexity. An LVFBP is a wedged filter, whose spectral properties vary linearly along the long side of the filter. It is possible to adjust the centre wavelength by
22 LASER SYSTEMS EUROPE ISSUE 21 • WINTER 2013
Major-A, a panchromatic detector with a sensitivity range of 450nm to more than 2,000nm and with
reduced temperature dependence of the photodiode. This digital sensor also boasts internal storage capacity and digital and analogue output. The Major-A was created for target
groups ranging from laser manufacturers to manufacturers of laser-based machine tools, and NIR-based measurement or monitoring equipment.
www.lasercomponents.co.uk
OPHIR PHOTONICS will exhibit its 30K-W laser power meter, which features an architecture that measures actual heat-flow. The end result is a faster response time, higher maximum power densities, and more
@lasersystemsmag |
www.lasersystemseurope.com
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