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Waviness Waviness is the measurement of the more widely spaced component of surface texture. It is a broader view of roughness because it is more strictly defined as "the irregularities whose spacing is greater than the roughness sampling length". It can occur from machine or work deflections, chatter, residual stress, vibrations, or heat treatment.〔.〕〔.〕 Waviness should also be distinguished from flatness, both by its shorter spacing and its characteristic of being typically periodic in nature. ==Parameters== There are several parameters for expressing waviness height, the most common being Wa & Wt, for ''average waviness'' and ''total waviness'', respectively.〔 In the lateral direction along the surface, the ''waviness spacing'', Wsm, is another parameter that describes the mean spacing between periodic waviness peaks. There are numerous measurement settings which influence these resultant parameter values, which are mentioned below. One of the most important is the ''waviness evaluation length'', which is the length in which the waviness parameters are determined. Within this length the ''waviness profile'' is determined. This is a surface texture profile that has the shorter roughness characteristics filtered out, or removed; it also does not include any profile changes due to changes in workpiece geometry that are either unintentional (flatness) or intentional (form). Waviness is included in the ISO standards ISO 4287〔(ISO 4287 ), Geometrical Product Specifications (GPS) -- Surface texture: Profile method -- Terms, definitions and surface texture parameters〕 and ISO 16610-21〔(ISO 16610 ), Geometrical product specifications (GPS) -- Filtration -- Part 21: Linear profile filters: Gaussian filters〕 as well as the U.S. standard ASME B46.1,〔(ASME B46.1 ), Surface Texture (Surface Roughness, Waviness, and Lay).〕 and it is part of the surface texture symbol used in engineering drawings.〔.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Waviness」の詳細全文を読む
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