...Accordingly, in practice, two appropriate maximum and minimum allowable dimensions (maximum and minimum allowable dimensions) are set so that the product satisfies its functions and is most advantageous in terms of processing, and the finished product is allowed to be within that range. The difference between the maximum and minimum allowable dimensions is called dimensional tolerance, and to indicate this on a drawing, various methods are used, such as writing the dimensional tolerance values slightly smaller and side-by-side next to the dimensional values indicating the reference dimensions (called reference dimensions), writing them above and below as the maximum and minimum allowable dimensions, or using symbols for the dimensional tolerances (fit symbols). *Some of the terminology explanations that refer to "standard dimensions" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…したがって,実際には,その製品の機能を満たし,かつ加工上ももっとも有利なように,適当な大小二つの許容限界寸法(最大許容寸法および最小許容寸法)を定め,その間の大きさに品物が仕上がればよいようにしている。この最大・最小許容寸法の差を寸法許容差といい,これを図面上で指示するには,基準となる寸法(基準寸法という)を示す寸法数値の次に,寸法許容差の数値をやや小さく,上下に並べて書く方法,大小の許容限界寸法としてこれを上下に書く方法,寸法許容差の記号(はめあい記号)による方法などが用いられる。 ※「基準寸法」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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