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Subject: цбк dubbing, crown Подскажите, кто знает, плиз!контекст: проверка надежности валов бумагоделательной машины To prevent excessive stress/wear outside the sheet edges, a taper or dub should be added, beginning about one inch outside the sheet. The normal amount of dub used as been previously discussed. It is important that the dub be re-installed at each regrind. Out-Crown Profile – This is an important area of attention. Out-crowns can be very informative not only to show the distribution of load across the roll face, but to provide direction in terms of crown amount and shape. In addition, the out-crown profiles may point to the need for compound crowns in more complex deflection situations. This consists of a primary crown ground on the center part of the cover and a steeper secondary crown ground on each end, blended at a specified location. |
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