Technical parameters of peak 20kW laser used in the aviation field

by:Caodahai     2021-09-07
This paper studies the practical application effect of continuous drilling with high peak power pulse (approximately 20kW) lasers with direct transmission and fiber transmission. At the same time, various lasers and operating parameters are used to process a large number of superheat-resistant nickel-based alloys. Holes, and statistics on processing time, recast layer, taper, oxide layer and cracking and other aspects. The blades, nozzle blades and combustion chambers of aviation gas turbines need to be cooled during operation. Therefore, thousands of holes are punched on the surface of these parts to ensure that the surface of the parts is cooled by a thin layer. Air coverage. This layer of cooling air can not only extend the service life of the parts, but also improve the working performance of the engine. A typical more advanced engine surface will have 100,000 such holes. With the development of drilling technology, the industry usually uses high peak power pulsed Nd-YAG lasers to process, and trepanning and pulse drilling (Percussion) technology has been successfully applied. EDM hole processing and laser drilling. At present, the temperature of gas used in jet engines in the aviation field can reach 2000°C. This temperature has exceeded the melting point of turbine blades and combustion chamber materials, that is, nickel alloys, so people generally use boundary layer cooling methods. To solve this problem, holes are machined on the surface of the gas turbine, nozzle blades and combustion chamber (see Figure 1). The holes on each part range from 25 to 40,000, and the cooling gas can pass through the small parts on the part. The hole covers the entire surface of the part to isolate the outside temperature, thereby playing a protective role. (The above has been edited and organized by the fiber laser cutting machine, see www.gnlaser.com for details)
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