螺紋旋合長(zhǎng)度.doc

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1、螺紋旋合長(zhǎng)度螺紋中徑合格性的判斷原則是實(shí)際螺紋的作用中徑不能超出最大實(shí)體牙型的中徑。而實(shí)際螺紋上任何部位的單一中徑不能超出最小實(shí)體牙型的中徑。螺紋的旋合長(zhǎng)分為三組，分別稱為短旋合長(zhǎng)度、中等旋合長(zhǎng)度、長(zhǎng)旋合長(zhǎng)度，相應(yīng)的代號(hào)為S、N和L。公稱直徑D、d螺距P旋合長(zhǎng)度公稱直徑D、d螺距P旋合長(zhǎng)度SNLSNL≤＞≤＞≤＞≤＞＞0.99～1.40.20.50.51.41.4＞11.2～22.42.5101030300.250.60.61.71.7＞22.4～450.753.13.19.49.40.30.70.

2、7221441212＞1.4～2.80.20.50.51.51.51.56.36.319190.250.60.61.91.928.58.525250.350.50.82.62.63121236360.411333.5151545450.451.31.33.83.8418185353＞2.8～5.60.3511334.5212163630.51.51.54.54.5＞45～9014.84.814140.61.71.7551.57.57.522220.7226629.59.528280.752.22.2

3、6.76.73151545450.82.52.57.57.5419195656＞5.6～11.20.51.61.64.74.75242471710.752.42.47.17.15.528288585133996323295951.25441212＞90～1801.58.38.325251.5551515212123636＞11.2～22.40.51.81.85.45.43181853530.752.72.78.18.142424717113.83.81111636361061061.254.54.5

4、1313＞180～3552131338381.55.65.616163202060601.75661818426268080288242464040118118