公差配合

與技術(shù)測量優(yōu)先數(shù)輪子的配置及運動軌跡及優(yōu)先數(shù)系優(yōu)先數(shù)和優(yōu)先數(shù)系是如何產(chǎn)生的？01優(yōu)先數(shù)和優(yōu)先數(shù)系在生產(chǎn)中有哪些作用？02優(yōu)先數(shù)有哪些特點？03優(yōu)先數(shù)如何正確選用？041.優(yōu)先數(shù)和優(yōu)先數(shù)系的產(chǎn)生數(shù)列設(shè)a為起始項，q為公比，a·q5=10a，即公比q=R5系列1.優(yōu)先數(shù)和優(yōu)先數(shù)系的產(chǎn)生a、aq、aq2

、aq3

、aq4

、10a

1.優(yōu)先數(shù)和優(yōu)先數(shù)系的產(chǎn)生德國制訂第一個優(yōu)先數(shù)系標(biāo)準(zhǔn)國際標(biāo)準(zhǔn)化協(xié)會公布通告轉(zhuǎn)為國際標(biāo)準(zhǔn)國際推演1920年1935年1973年發(fā)布部標(biāo)JB109-60《優(yōu)先數(shù)及優(yōu)先數(shù)系》制定國標(biāo)GB321-64《優(yōu)先數(shù)及優(yōu)先數(shù)系》再次修訂國內(nèi)推演1960年1964年1980年2.優(yōu)先數(shù)和優(yōu)先數(shù)系在生產(chǎn)中的作用螺紋孔螺釘絲錐螺紋量規(guī)鉆頭優(yōu)先數(shù)系是公比為的十進(jìn)等比數(shù)列。優(yōu)先數(shù)系有五個系列，用Rr表示，即：R5，R10，R20，R40，R80。基本系列優(yōu)先數(shù)系公比表示方法公比數(shù)值R51.60R101.25R201.12R401.06R801.033.優(yōu)先數(shù)和優(yōu)先數(shù)系的特點補充系列計算值5位有效數(shù)字5.0020常用值3位有效數(shù)字5.00化整值2位有效數(shù)字5.03.優(yōu)先數(shù)和優(yōu)先數(shù)系的特點（1）數(shù)值分類優(yōu)先數(shù)值從左邊第一個不為零的數(shù)起，所有數(shù)都是這個數(shù)的有效數(shù)字。3.優(yōu)先數(shù)和優(yōu)先數(shù)系的特點（2）有效數(shù)字位數(shù)的判斷

0.0520

3位有效數(shù)字（5，2，0）1.322.050.183.200.05033232基本系列R5系列1.001.602.504.006.3010.0R10系列1.00

1.251.602.002.503.154.005.006.308.0010.0R20系列1.001.121.251.401.601.802.002.242.502.803.153.554.004.505.005.606.307.108.009.0010.0R40系列1.001.061.121.181.251.321.401.501.601.701.801.902.002.122.242.36

2.502.652.803.003.153.353.553.754.004.254.504.755.005.305.606.006.306.707.107.508.008.509.009.5010.0補充系列R80系列1.001.031.061.091.121.151.181.221.251.281.321.361.401.451.501.551.601.651.701.751.801.851.901.95

2.002.062.122.18

2.242.302.362.432.502.582.652.722.802.903.003.073.153.253.353.453.553.653.753.874.004.124.254.374.504.624.754.87

5.005.155.305.455.605.80

6.006.156.306.506.706.907.107.307.507.758.008.258.508.759.009.259.509.75123453.優(yōu)先數(shù)和優(yōu)先數(shù)系的特點（3）優(yōu)先數(shù)和優(yōu)先數(shù)系基本系列R5系列1.001.602.504.006.3010.0R10系列1.00

1.251.602.002.503.154.005.006.308.0010.0R20系列1.001.121.251.401.601.802.002.242.502.803.153.554.004.505.005.606.307.108.009.0010.0R40系列1.001.061.121.181.251.321.401.501.601.701.801.902.002.122.242.36

2.502.652.803.003.153.353.553.754.004.254.504.755.005.305.606.006.306.707.107.508.008.509.009.5010.0基本系列R5系列1.001.602.504.006.30

R10系列1.00

1.251.602.002.503.154.005.006.308.0010.010.016.025.040.063.01003.優(yōu)先數(shù)和優(yōu)先數(shù)系的特點（3）優(yōu)先數(shù)和優(yōu)先數(shù)系1234512345基本系列R5系列1.001.602.504.006.3010.0R10系列1.00

1.251.602.002.503.154.005.006.308.0010.0R20系列1.001.121.251.401.601.802.002.242.502.803.153.554.004.505.005.606.307.108.009.0010.0R40系列1.001.061.121.181.251.321.401.501.601.701.801.902.002.122.242.36

2.502.652.803.003.153.353.553.754.004.254.504.755.005.305.606.006.306.707.107.508.008.509.009.5010.0燈泡瓦數(shù)15W，25W，40W，60W，1