JB/T9179.31999前合本標(biāo)準(zhǔn)是對(duì)ZBJ32003.3-88水壓機(jī)上自由鍛件機(jī)械加工余量與公差臺(tái)階軸類》的修訂。在修訂時(shí),對(duì)原文作了編輯性修改,主要技術(shù)內(nèi)容作了如下修改:附加余量按水壓機(jī)噸位分檔次確定本標(biāo)準(zhǔn)自實(shí)施之日起代替ZBJ320033--88。本標(biāo)準(zhǔn)的附錄A、附錄B附錄C都是標(biāo)準(zhǔn)的附錄本標(biāo)準(zhǔn)由全國鍛壓標(biāo)準(zhǔn)化技術(shù)委員會(huì)提出并歸口木標(biāo)準(zhǔn)負(fù)責(zé)起草單位:上海重型機(jī)器廠。本標(biāo)準(zhǔn)主要起草人:王謙和、謝培德。364中華人民共和國機(jī)械行業(yè)標(biāo)準(zhǔn)水壓機(jī)上自由鍛件機(jī)械加工余量與公差JB/T9179.3-1999臺(tái)階軸類代膂ZBJ320:3.3Machining allowances and tolerances of open die forgingson hydraulic press-Stepped shaft1范圍本標(biāo)準(zhǔn)規(guī)定了水壓機(jī)上自由鍛臺(tái)階軸類鍛件的余量與公差。木標(biāo)準(zhǔn)適用于截面為圓形、方形和矩形的臺(tái)階軸類自由鍛件。2引用標(biāo)準(zhǔn)下列標(biāo)準(zhǔn)所包含的條文,通過在本標(biāo)準(zhǔn)中引用而構(gòu)成為本標(biāo)準(zhǔn)的條文。本標(biāo)準(zhǔn)出版時(shí),所示版本均為有效。所有標(biāo)準(zhǔn)都會(huì)被修訂,使用本標(biāo)準(zhǔn)的各方應(yīng)探討使用下列標(biāo)準(zhǔn)最新版本的可能性JB鄺T9179.2-1999水壓機(jī)上自由鍛件機(jī)械加L余量與公差圓軸、方軸和矩形截面類3余量與公差臺(tái)階軸類自由鍛件的機(jī)械加工余量與公差應(yīng)符合圖1表1和JB/T9179.2的規(guī)定。(1~1.5)a1~1.5}1~1.5)a(1~1.5)a(1~1.5)(1~1.5)4(I~1.5)a(1~1.5(1~1,5)u(1~1.5)a(1~1.5)a(1~1.5圖1國家機(jī)械工業(yè)局199-06-24批準(zhǔn)2000-01-01實(shí)施JB/T9179.3—1999表1J直徑尺寸上截面直徑差大于-56|112180|250|315|40450501560630,7108009001001200附加余量選用鍛壓設(shè)備至561182031510045|500560680101900900100120080800~16Q0kN56810J1113|1416182123262936|42500~3150kN3449111314161812123262932414560000~120000kN6810121141618202326!29323643504一般規(guī)定41根據(jù)軸總長(zhǎng)和最大截面的基木尺寸,按JB/T9179.2選取余量,作為該軸全部直徑(截面)上的菲木余量4.2根據(jù)軸最大的相鄰直徑(截面)差,按表1選取附加余量,并把附加余量加在基本余量上?；居嗔考由细郊佑嗔烤褪窃撦S的余量。極限偏差按余量的1/3取值。4.3鍛件的臺(tái)階和凹檔可鍛出的最小高度與最小深度按附錄A(標(biāo)準(zhǔn)然附錄)的規(guī)定。44鍛件的臺(tái)階和凹檔可鍛出的最小長(zhǎng)度按附錄B(標(biāo)準(zhǔn)的附錄)的規(guī)定4.5鍛件法蘭鍛出的最小長(zhǎng)度按附錄C(標(biāo)準(zhǔn)的附錄)的規(guī)定。4.6應(yīng)用示例:D1=450mm;1=200mm;D2=200mm;l2=2200mm;D3=500mm;J2=150mm;總長(zhǎng)L=2550mm;選用25000kN水壓機(jī)查得:基本余量為34mm,附加余量為11mm,所以余量與極限偏差為45mm±15mm;求得鍛件基本尺寸:D19=450+45=495mm極限偏差士15mm;1=200+45×2.5=312.5mm(取315mm)極限編差士38mm;D20=200+45=245mmn極限偏差x15mm;L2。=2200-45×2.5=2087.5mm(取2090mm)極限偏差士38mm;D20=500+45=545mm極限偏差士15mm;L3=150+45×2.5-262.5mm(取265mm)極限偏差士38rnm;總長(zhǎng)L0=2550+45×2.5-2662.5mm(取2665mm極限偏差±38mm6JBT9179.3-1999附錄A標(biāo)準(zhǔn)的附錄)臺(tái)階軸的臺(tái)階、凹檔可鍛出的最小高度與最小深度A1臺(tái)階軸類的臺(tái)階、叫檔可鍛出的最小高度與最小深度,應(yīng)符合圖A1及表A1的規(guī)定。La邇圖A1表A1與臺(tái)階鄰接的直徑(D2、D4D)3)鍛件長(zhǎng)度于-{200;270133540014701535600670750835900100011011201350145116至!200270335400470535160670750835900100110012001301430:16001900大于至可鍛出的最小臺(tái)階高度(1、h4、h3)或凹檔深度(h2、h3)1000121416182022242628303234381042000200013151719212325,2729313353739411652200040015171921232527293133353739414341540006001719212325272931333537」394343451476600800019212832527}2931333537139414345425880001000212325272913133135373941434574951546000001200022242628303234363840424416485052120001400023252729313335373941|43454749558|64l400016000272931{333537394143454749515355606616000180003135}37}3941435147495153518002000035!3739414345147119515357596470注1按緊連凹檔的直徑D2或D4查取凹檔的最小鍛出深度。2當(dāng)凹檔鍛出前坯料號(hào)印長(zhǎng)度等于或大于水壓機(jī)砧子寬度時(shí),凹檔必須鍛出。當(dāng)凹檔鍛出前坯料號(hào)印長(zhǎng)度小于水壓機(jī)砧子寬度時(shí),允許放大凹檔直徑,使號(hào)印后坯料的長(zhǎng)度等于砧子寬度。367JB/T9179.3-1999附錄B(標(biāo)準(zhǔn)的附錄)臺(tái)階軸的臺(tái)階、凹檔可鍛出的最小長(zhǎng)度B1臺(tái)階軸類的臺(tái)階、凹檔可鍛出的最小長(zhǎng)度,應(yīng)符合附錄A中的圖A1及本附錄表B1的規(guī)定。表B1rnn與臺(tái)階鄰接的直徑(D2、D1、D3)鍛件長(zhǎng)度大于-200270334004705356001670750835901000100}120013501451600L至|200270335400470535606707501835190010001001200135014501600190大于至端面臺(tái)階可鍛出的最小臺(tái)階長(zhǎng)度(L1、L3、L6)或凹樺長(zhǎng)度()2001501902302701310|350390430470510|5505906306707107501790840200040001902302701310135394304705105501590630670710750790|840924006000230|270|310350|3994301470110|550590|63670710730|790840192098060008002701310|30|39043047015101550159063067071017507908409209801040800003:03501390|430470|51055|390630677101750|790840920901040111010000120c3501390430470510550590630167071075079084092098010401109111601200014000390430470510550590]63067071750790;810920|98010401100i1160122014GoO16000A470151050|590|680|670710|75079084092090104011001160122011280,,,16000|180003501390|6301670710{750|790840192098010401100116011220126023408002063067071017501790840920981001100116012201280134040注當(dāng)臺(tái)階高度h1小于40mm時(shí),表中數(shù)值可增加2。%2中間臺(tái)階的可鍛出的最小長(zhǎng)度為表值50%3當(dāng)凹檔鐓出前坯料號(hào)印長(zhǎng)度等于或大于水壓機(jī)砧子寬度時(shí),四檔必須鍛出;當(dāng)凹檔鍛出前坯料號(hào)印長(zhǎng)度小于水壓機(jī)磚子寬度時(shí),允許放大凹檔直徑,使號(hào)印后坯料的長(zhǎng)度等于砧子寬度B2應(yīng)用實(shí)例:確定圖B1臺(tái)階軸中間凹擋是杏鍛出首先查取余量,得到中間凹擋深度為125mm,長(zhǎng)度為150mm。再查附錄A中的表A1、附錄B中的表1,查出凹檔深度為37mm,長(zhǎng)度為630mm。雖然凹檔深度大于表中數(shù)值,但長(zhǎng)度已小于表中數(shù)值,所以臺(tái)階軸的凹檔可不鍛出,臺(tái)階軸應(yīng)按圖B2鍛件圖鍛壓004751754254150(1000)350)(300)(300)(500)1000950(500)(2450)2575士42450)圖Bl圖12JB/T9179.3-1999附錄C(標(biāo)準(zhǔn)的附錄)帶法蘭鍛件法蘭鍛出的最小長(zhǎng)度C1帶法蘭鍛件法蘭鍛出的最小長(zhǎng)度應(yīng)符合圖C1及表C1的規(guī)定L圖C1表C1mm中同法蘭直徑D零件軸徑大于0200300400500607008009010010012001300140150016017c180190200d至2043004000060070080900100010012013014001500160017co800l9002000210大于至中間法蘭的最小鍛出長(zhǎng)度L10050|801010180204---20030030601001201601902202602903203603004004070100140170200240270300340380420460510|560400150060901201501802202502803203503904304805305806206705006007010013016020023026030032036040045050055060;65600i7008011014180210240280300340380430480530580630700180010o130160!200220260280320360410460510560610800901101401702002302603003203704204705205709001000120160190220240280300350390440490540100011001401702002302602801320370142047052010012001501802102026030310400444901200130017020220240280310350390440300140080202202642903301870420140015001902102402703i03503901500160020023026029033037016001700210240270310350230260300340800196025029033028032020002100300注;端部法蘭按表列數(shù)值增加50%359