攻絲跟絲作業(yè)指導(dǎo)書

攻絲/跟絲作業(yè)指導(dǎo)書編號：WHJX/ZD02-04編制：技術(shù)科審核：王鳳立同意：徐公明實施日期:.8.8諸都市五環(huán)機械有限公司諸都市五環(huán)機械有限公司編號攻絲/跟絲作業(yè)指導(dǎo)書版次章節(jié)號生效日期頁碼第1頁共3頁根據(jù)國家有關(guān)原則及玉柴有關(guān)規(guī)定，結(jié)合我公司的具體狀況，特制訂此作業(yè)指導(dǎo)書，作為我公司的攻絲、跟絲作業(yè)的指導(dǎo)性文獻(xiàn)。攻絲1．1攻絲前的準(zhǔn)備1．1．1攻絲前必須先鉆好底孔。螺紋底孔直徑必須符合以下表的規(guī)定。螺紋底孔孔徑（普通螺紋）螺紋規(guī)格M3M3.5M4M4.5M5M6M8螺距0.50.350.350.70.50.50.80.510.751.2510.75螺紋底孔2.462.623.123.243.563.964.134.464.925.196.656.927.19螺紋規(guī)格M10M12M14M16螺距1.51.2510.751.751.51.25121.5121.51螺紋底孔8.388.658.929.1910.1110.3810.6510.9211.8412.3814.9213.8414.3814.92螺紋規(guī)格M18M20M22螺距2.521.512.521.512.521.51螺紋底孔15.2915.8416.3816.9217.2917.8418.3818.9219.2919.8420.3820.92螺紋規(guī)格M24M27M30螺距321.51321.513.521.51螺紋底孔20.7521.8422.3822.9223.7524.8425.3825.9226.2127.8428.3828.921.1.2螺紋底孔倒角。螺紋底孔倒角只能倒到螺紋大徑。（除工藝文獻(xiàn)規(guī)定外，普通倒角角度為45o）螺距0.350.50.7511.251.51.7522.533.5螺紋倒角高度0.30.40.60.80.911.51.52.02.331．2螺紋精度及螺紋的粗糙度必須符合圖紙及工藝文獻(xiàn)的有關(guān)規(guī)定。內(nèi)螺紋的基本偏差(摘錄)μm基本偏差 螺距0.350.50.70.750.811.251.51.7522.53G(EI)192022222426283234384248H(EI)000000000000內(nèi)螺紋小徑公差(摘錄)μm公差等級 螺距0.350.50.70.750.811.251.51.7522.53610014018019020023623530033537545050071802242362503003353754254755606301．3螺紋的檢查1．3．1檢查技術(shù)規(guī)定。螺紋的檢查必須使用與圖紙及工藝文獻(xiàn)所規(guī)定螺紋精度相符的通規(guī)、止規(guī)進(jìn)行。只有通規(guī)、止規(guī)檢查合格的產(chǎn)品才是合格產(chǎn)品。1．3．2檢查抽樣方式。1．3．2．1操作者1．3．2．1.1操作者首件檢查合格后，標(biāo)記，并做好統(tǒng)計，經(jīng)質(zhì)檢復(fù)核即可開工生產(chǎn)。1．3．2．2.2過程檢為每30件檢一件。并作統(tǒng)計。1．3．2．2質(zhì)檢員1．3．2．2．1首件檢查合格后，作好統(tǒng)計。1．3．2．2．2巡檢為每班二次（每批