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Furthermore, one should not underrate the economic environmental impacts of consuming more processing gases. Significant energy is expended in the production of gases such as argon, which negatively affects the overall sustainability and end price of the manufactured product. At the same time, as more processing gases are consumed, more processing by-products - both gaseous and particulate - are emitted. Such emissions can reduce the quality of the optics, resulting in further reduction in beam quality. Figure 1 depicts the impact of low beam quality on costs per part.
Rms surface roughnesstable
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Rms surface roughnesschart
This section explains the main parameters of ISO 4287:1997. Each parameter is classified according to primary profile (P), roughness profile (R), and waviness profile (W) in order to evaluate different aspects of the profile. (When the wavelengths of the waviness and primary profile components are compared, the surface roughness component is the asperity component of that which has the comparatively shorter wavelength.)
The distribution of the power and energy density in the beam is considered a key parameter in most laser applications; it determines the effectiveness of laser processing in the material. This parameter is calculated by dividing the emitted power or energy by the cross-sectional area of the focused beam (details regarding such laser parameters are given in Radiometric Measurement). The higher the power or energy density in the focus, the more efficiently the laser processing operation performs. An unexpected increase in focal spot size can severely impact the beam's power density leading to deleterious effects such as:
For the roughness profile, Rq is referred to as the root-mean-square roughness, while Wq is referred to as root-mean-square waviness for the waviness profile.
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