Papers by Keyword: Engraving

Abstract: The development of innovative micro components depends on the manufacturing system and process that reliable to produce the component in micro scale with good quality. In this case, using CO₂ Laser is one of microfabrication techniques to fabricate material to get micro component. In this research, experiment was performed to fabricate micropattern using engraving method by Laser CO₂ machine with several independent variables such as focus distance of nozzle Laser to workpiece (F), power of Laser (P), and velocity of nozzle Laser movement (V). The workpiece in this research was acrylic. Result of fabrication process will be identified and measured using digital microscope and surface roughness tester to get the value of workpiece quality such as surface roughness and geometrical properties as the dependent variables. The relationship of both variables will be expressed in 3D curves characteristic and mathematical models were analyzed by response surface methodology (RSM). The result of the analysis shows that the power of Laser (P) and velocity of Laser nozzle movement (V) effect is the significant variables affecting the quality of micropattern and micromold fabrications. Micromold can be fabricated using Laser CO₂ with roughness value (Ra_x) is 17,55μm, width of grove (W) is 135 μm, depth (D) is 341 μm.

Abstract: The structural layout and basic principle of a four-coordinate CNC device mounted on a common CNC milling machine was introduced, with it four-coordinate workpieces can be machined by a single setup,which can reduce costs and improve efficiency.

Abstract: Takes aluminum alloy ZL301 as an example, gets different surface roughness and cutting time under different cutter rotate speed and different overlapping rate with CNC engraving technique and analyses the reasons. The result is that the more of overlapping rate, the more cutting time, and the less of the surface roughness. While the overlapping rate≥50%, the roughness Ra≤6.3μm, while the overlapping rate≥70%, the cutting time increasing obviously. Consider the efficiency and the surface roughness, the best overlapping rate is from 50%～70%. The more of cutter rotate speed, the less of the surface roughness. While the overlapping rate≤70%, the cutter rotate speed almost no influence to the cutting time.

Abstract: Pico and femtosecond lasers present a growing interest for industrials applications such as surface structuring [1] or thin film selective ablation [2]. Indeed, they combine the unique capacity to process any type of material (dielectrics, semiconductors, metals) with an outstanding precision and a reduced affected zone. We report on results about surface engraving of metals (Al, Cu, Mo, Ni), semiconductor (Si) and polymer (PC) using a picosecond thin disk Yb:YAG-amplifier. The pulse duration of this source can be changed using two different configurations: direct amplification of a 34ps-oscillator on one hand, and 1ps-chirped pulse amplification (CPA) scheme on the other hand. The results obtained with this thin disk laser are compared to ones achieved with two commercial femtosecond lasers respectively based on Yb-doped crystals and fibers, and operating at similar output power levels (up to 15Watt).

Abstract: The aim of this study is to investigate the effect of scan speed and frequency on surface roughness and engraving depth of AISI H13 hot work tool steel. The experimental studies were conducted by fiber laser marker machine. The relationship between the parameters is showed that the highest surface roughness and depth values were achieved at lowest scan speed (125mm/s). The depth and surface roughness of engraved geometry was decreased at increase in scan speed. It was concluded that, the surface roughness and depth can be controlled by scan speed and frequency.