A laser system may also include one or more amplification stages additional gain media that further increase the optical power. Key differences among laser designs include:. The choices made by the laser designer among these technologies determine all of the important laser characteristics, including performance power, efficiency, beam quality, wavelength, polarization, stability, etc. Three key technologies have been especially important for the development of high-performance, high-reliability lasers for industrial applications:.
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Space-Qualified Traveling-Wave Tube. Additionally, modular workholding systems easily integrate laser texturing with other processes that a manufacturer may already use. Production parts can mount on pallets with a reference system that transfers across multiple machining processes and eliminates the need to re-reference parts between steps, which drastically reduces setup times.
Also, laser texturing can be used to protect against counterfeit parts. Through the part program, a user can create a unique texture code on a nano scale. Industry experts predict that nano-sized textures will eventually be used in medical component traceability.
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Trumpf Inc. Farmington, CT is expanding its technology product range in additive manufacturing with the introduction of its TruPrint , the latest solution in laser metal fusion LMF , which gives the ability to build up a component layer by layer.
Trumpf has continuously improved its process first established 15 years ago and offers a complete package for industrial 3D printing, including the laser beam source, machine powder, services and application consulting. The new TruPrint uses a laser and metallic powder to build any desired component, based on data supplied directly by a CAD program. Additive manufacturing technology is well-suited for parts that are complex in geometry, such as those with internal channels and hollow spaces, and for manufacturing individual parts or short production runs economically.
It can generate parts that are a maximum of mm in diameter and mm in height.
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The user interface with touch-screen control steps the operator intuitively through the individual phases of the process. All the components, including the laser, optics, process enclosure, filter unit and control cabinet, are integrated into the compact housing of the TruPrint The supply cylinder, construction chamber, and the overflow receiver are all aligned inside the enclosure.
The supply cylinder contains the stainless steel, aluminum or any weldable material in powdered form. During the build, a layer of metal powder is applied to a substrate plate and then a W laser is used to fuse the cross section of the geometry to the plate.
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After the exposure the plate is lowered and the next layer of powder is applied. This procedure is repeated until the part is finished.
The entire process takes place inside the enclosure, blanketed by protective gas, and at an oxygen content of 0. In LMD systems, the laser forms a melt pool on the surface of a component and fuses the powder—applied simultaneously and coaxially—to create the desired shape.
Applying multiple layers enables the user to expand the form in any direction.
In addition, complex structures can be added to existing parts allowing for the design of common base structures that have features and strength added where needed. Prima Power Laserdyne Champlin, MN has introduced improved process parameters for laser welding nickel-based aerospace alloys to meet stringent airframe and aero-engine requirements.
High-quality butt and lap joint weld are possible and practical in a number of common nickel-based aerospace alloys following guidelines established by Laserdyne applications engineers.
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Integrated laser and motion control with the Laserdyne S9P laser process control enables production of crack-free welds through use of laser process parameters that take into account the relatively large solidification temperature range of nickel-based aerospace alloys and the fact that brittle phases can form when solidification rates are low.
Joint cleaning to remove contaminants before welding nickel-based aerospace alloys is essential. At high temperatures, nickel alloys are susceptible to embrittlement from sulfur, phosphorus, lead, and other low-melting point substances that are often present in materials used in everyday manufacturing processes. Typical contaminants include grease, oil, paint, cutting fluids, marking crayons and inks, machine lubricants and lacquers.
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Correct fixturing to control thermal expansion during welding is similarly important. The thermal expansion characteristics of nickel-based aerospace alloys are similar to those of carbon steel. When welding, the forces and distortion generated by both materials are similar and require component restraint by a properly designed holding fixture.
The restraint provided can be used to control stress in the weld.viptarif.ru/wp-content/kit/1526.php
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For example, if an appropriate clamping force is used to restrain the material near the weld joint, the expansion created in the weld joint will lead to a compressive force in the weld. This compressive force will in turn lead to upsetting of the weld metal and corresponding reinforcement, or crown, of the top and bottom of the weld, even without filler metal.
In addition to proper clamping, the fixture must also provide the proper shielding of the top and back sides of the weld. Shield gas is provided to the back side of the weld through a special groove in the fixture beneath the weld. Available as either a manual load system or with IPG-designed automated part handling, the Multiaxis Workcell has application in the manufacture of medical devices, automotive components, electrical enclosures, or any similar metal structures.
Machine construction and the system are based on a granite table and superstructure for thermal and mechanical stability. High-force linear motors provide precision high-speed X-Y motion compatible with processing intricate components, with a mm travel Z-stage enabling machining of 3D parts. Rotary motion can be applied to any, or each of the primary stage axes, with a process head tilting option also available. The motion and laser processing system is integrated within a Class 1 laser safety enclosure with a laser safe viewing window.
The Multiaxis system can be configured for welding or cutting by selection of the appropriate IPG fiber laser and processing head.
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