【正文】 t present in domestic uses the sole flexible graphite link padding the situation quite to be many。如果是氣體介質(zhì)，則很容易在空氣中擴(kuò)散傳播，其污染半徑就會(huì)較大。隨著科學(xué)技術(shù)的進(jìn)步，特別是新材料的出現(xiàn)，一些新結(jié)構(gòu)的調(diào) 節(jié)閥門已投入使用，它們性能好、壽命長(zhǎng)，可滿足生產(chǎn)發(fā)展的需要。填料分軟質(zhì)密封填料和成型填料兩種。 附 錄 The packing box divulges reason analysis and countermeasure abstract: Reason the packing box divulges which through the analysis petrochemistry enterprise each kind of adjustment valve in, as well as the adjustment valve divulges the harm which brings to the environment and the production, proposed some solution countermeasures. Guan Jianci: Adjusts the valve。 K4 — 斷續(xù)切削系數(shù) , 則 F/ =KF= )(4 2 3 92 1 2 N????? 氣缸選用 mm100? 。 mmap ? f=wn =425r/min V=80m/min 工序 Ⅶ ：銑Φ 60 孔底面 銑床： X63 銑刀：選用立銑刀 d=10mm L=115mm 齒數(shù) Z=4 切削速度：參照有關(guān)手冊(cè)，確定 v=15m/min mmaw 7? 1015100 0100 0 ? ??? ?? ws d vn=采用 X63 臥式銑床，根據(jù)機(jī)床使用說明書（見《工藝手冊(cè)》表 ） 取 wn =475r/min 故實(shí)際切削速度為： m i n/ 475101000 mndv ww ????? ?? 當(dāng) min/475rnw ? 時(shí)，工作臺(tái)的每分鐘進(jìn) 給量 mf 應(yīng)為 m i n/ mmznff wzm ????? 查機(jī)床說明書，剛好有 min/150mfm ? 故直接選用該值。 f=~按 C620— 1車床說明書（見《切削手冊(cè)》表 ） 取 f= mm/r 計(jì)算切削速度 : 按《切削手冊(cè)》表 ,切削速度的 計(jì)算公式為 Vc =vyxpm v kfaT c vv(m/min)?????????? 式中 , vc =, x v=, yv =,m=。 （ 4）內(nèi)孔 ф 60H8( ? )。 這樣由于鉆孔屬于粗加工，其精度要求不高，且切削力較大，可能會(huì)引起已加工表面變形，表面粗糙度的值增大。 工序 Ⅶ 銑 ф 60 孔底面 工序 Ⅷ 磨 ф 60 孔底面。 粗基準(zhǔn)的選擇 對(duì)于一般軸類零件而言，以外圓作為粗基準(zhǔn)是完全合理的。目 錄 前 言 ............................................................................................................................ 2 1 零件的分析 .............................................................................................................. 3 零件的作用 ................................................................................................... 3 零件的工藝分析 ........................................................................................... 3 2 工藝規(guī)程設(shè)計(jì) .......................................................................................................... 4 毛坯的制造形式 ........................................................................................... 4 基準(zhǔn)面的選擇 ............................................................................................... 4 粗基準(zhǔn)的選擇 ．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．． 4 精基準(zhǔn)的選擇 ．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．． 4 制訂工藝路線 ............................................................................................... 4 工藝線路方案一 ．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．． 5 工藝路線 方案二 ．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．． 5 工藝方案的比較與分析 ．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．． 5 機(jī)械加工余量、工序尺寸及毛坯尺寸的確定 ........................................... 6 確定切削用量及基本工時(shí) ........................................................................... 7 工序Ⅰ：車削端面、外圓 ．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．． 7 工序 Ⅱ：粗車 ? 65,? 80,? 75,? 100 外圓以及槽和倒角 ．．．．．． 9 工序Ⅲ 鉆擴(kuò) 32? mm、及锪 mm43? 孔。按照有關(guān)的粗基準(zhǔn)選擇原則（保證某重要表面的加工余量均勻時(shí)，選該表面為粗基準(zhǔn)。 工序 Ⅸ 鏜ф 60 孔底面溝槽。因此，最后的加工工藝路線確定如下： 工序 Ⅰ 車削左右兩端面。要求以外圓面 ф 65H5（ ? ）定位，鑄出毛 坯孔 ф 30。修正系數(shù) kv 見《切削手冊(cè)》表 ,即 kmv=, ksv =, kkv =, kkrv =, kBV = 所以 Vc = ??????? =(m/min) 確定機(jī)床主軸轉(zhuǎn)速 ns =??dVC1000 = ?? =253(r/min) 按機(jī)床說明書 （見《 工藝 手冊(cè)》表 — 8） 與 253r/min 相近的機(jī)床 轉(zhuǎn)速有 230r/min 及 305r/min。 計(jì)算切削工時(shí) L=（ 60mm30mm） =30mm m ??mt 倒角 1x45176。當(dāng)壓縮空氣單位壓力 P= ,夾緊拉桿 mmD 25?? 。 The packing box divulges。成型填料以彈性材質(zhì)為原料，采用模壓成型或車削加工制成各種環(huán)形密封圈，相比之下，成型填料結(jié)構(gòu)緊湊，密封性能好，適用性更強(qiáng)。 參考文獻(xiàn)： 1 王訓(xùn)拒 .閥門使用維修手冊(cè) [s].北京：中國石化出版社， 1999 2 張德姜 .石油化工裝置工藝管道安裝設(shè)計(jì)手冊(cè)第二篇〔 S].北京：中國石化出版社， 1998 3 陸培文 .閥門選用手冊(cè) [S].北京：機(jī)械工業(yè)出版社， 。 3 調(diào)節(jié)閥門泄漏造成的損失 由以上情況引起的泄漏，所造成的經(jīng)濟(jì)損失和對(duì)環(huán)境的污染程度又因介質(zhì)的特性的不同而有所不同。 Countermeasure 1 foreword adjustment valve is the petroleum chemical industry refines oil in the installment the essential part, its use adjustment valve type many, quantity big, in the chemical production medium many is corrosiveness strong, virulent or is flammable explosive, when adjusts the valve divulges, not only can create the serious raw material, the energy and the product waste, moreover also has the serious influence to the environment, even causes the serious security accident. . Therefore, we have the necessity also to have to take in the petroleum chemical industry production process to adjust the valve to divulge the question. Under causes the reason on the petroleum chemical industry installment in which the adjustment valve packing box divulges as well as prevented divulges the countermeasure, the method with the elimination makes the key discussion. 2 adjustments valves packing box divulges the reason analysis adjustment valve divulges divides into two kinds, namely outside divulges with the interior divulges. In the majority situation, outside divulges the consequence which creates, often divulges pared to the interior seriously. In the industrial production, adjusts the valve outside to leak not only creates the raw material and the energy waste, but also can directly pollute the environment, even causes the fire, the detonation, is poisoned and so on the harm safety significant accident, the national economy creates the heavy loss for. Outside but the packing box divulges also belongs leaks. The packing box divulges reason: The packing box by the stuffing box, the padding, the padding pad as