焊管·第28卷第5期·2005年9月 43 STT+CO2自动焊接技术 范晓明 (中国石化股份公司管道储运分公司鲁宁输油处,山东邹城273500 摘要:针对αO2气体保护自动焊存在的“飞溅这一严重缺陷,着重从STI控制原理和应用 两方面阐述了STT+αO2自动焊技术。工程实践证实,应用STI控制的CO2气体保护焊能够 极大地减少焊接时的飞溅,焊缝成型美观。并对甬一沪一宁进口原油管道工程中采用此焊接 技术仍出现少量飞溅现象和爆裂声进行分析,指出美国IN-23P送丝机送丝速度的合理控制 是改进这种现象的关键所在。新型改进的送丝机构已在仪征一长岭原油管道建设工程中得到 应用,效果很好。 关键词:STI控制原理;OO2气体保护自动焊;焊接电流;焊接速度;送丝速度 中图分类号:TG409文献标识码:B文章编号:1001-3938(2005)05-0043-02 ST+CO2自动焊及控制原理 桥”化爆断,引起飞溅。爆炸的能量为液态小 桥中所积聚的总的气化热能P1, 焊接作为材料连接及成型工艺,已成为现代 PI =RB 制造技术中不可缺少的部分。电弧焊仍是众多焊式中R-爆炸时液态小桥的半径 接工艺中应用最广泛的,而气体保护自动焊是电 L一液态小桥的长度;q金属的气化热 弧焊较为先进的工艺技术,它在长输管道的建设 根据电爆破理论,电爆破能量主要由在液态 中己逐步取代手工焊。但是气体保护自动焊尤其小桥爆破前100~150μs内的短路电流所决定 是αO2气体保护自动焊有一严重的缺陷一飞溅。的。所以控制飞溅也就是主要将液态小桥爆破前 为减小飞溅的产生,人们采取了各种技术手段,但150μs内的短路电流迅速减下来。又由于CO2气 收效甚微,使用TKG焊或MKG焊高昂的成本阻碍体保护焊的过渡频率在每秒几十次,这种积累的 了这种方法的广泛应用。 飞溅量很大,焊缝成型也受到破坏。STT控制的 为解决这一问题,美国林肯公司研制开发了焊接方法就是从根本上解决了液态“小桥”气化 类专用于αO2气体保护焊的电源,使用这一电爆断的问题,其核心就是在形成短路小桥'后焊 源能极大减少焊接时的飞溅,改善焊缝成型,这一接电流瞬间减小,在表面张力、重力和电磁力作用 优点已经在工程实践中得到证实,使飞溅减少了下,拉断金属“小桥”,使熔滴由短路过渡转变为 80%~85%。 自由过渡。这种方法其实质就是利用电弧本身作 CO2气体保护焊电源能减少飞溅的根本原因为传感器来检测电弧电压,根据电压来判断熔滴 是采用了ST( Surface Tension Transfer)控制技过渡的瞬时形态,从而根据检测到的电弧电压的 术。大家知道αO2气体保护焊最大的缺陷是飞变化,按照ST的要求控制瞬时电弧电流的变 溅,飞溅形成的原因是由于CO2气体保护焊在焊化,利用表面张力的作用达到熔滴平稳过渡的目 接时其熔滴过渡的方式是短路过渡,即当焊丝与的。ST控制过程示意图见图1 熔池金属之间形成液态金属“小桥”时,较大的短 路电流流过逐渐变细的“小桥”,产生较大的电阻2STT+OO2自动焊技术在工程中的应用 热,电爆破理论认为短路过程中形成的液态“小 桥被急剧加热,过量的能量积累导致液态“小 甬一沪一宁进口原油管道工程是由中石化管 2 01994-2009 China Academie Joumal Electronic Publishing House. all rights reserved hup: /ww cnki.net
STT + CO2 自动焊接技术 范 晓 明 (中国石化股份公司管道储运分公司 鲁宁输油处 , 山东 邹城 273500) 摘 要 : 针对 CO2 气体保护自动焊存在的“飞溅 ”这一严重缺陷 ,着重从 STT控制原理和应用 两方面阐述了 STT +CO2 自动焊技术。工程实践证实 ,应用 STT控制的 CO2 气体保护焊能够 极大地减少焊接时的飞溅 ,焊缝成型美观。并对甬 —沪 —宁进口原油管道工程中采用此焊接 技术仍出现少量飞溅现象和爆裂声进行分析 ,指出美国 LN - 23P送丝机送丝速度的合理控制 是改进这种现象的关键所在。新型改进的送丝机构已在仪征 —长岭原油管道建设工程中得到 应用 ,效果很好。 关键词 : STT控制原理 ; CO2 气体保护自动焊 ; 焊接电流 ; 焊接速度 ; 送丝速度 中图分类号 : TG409 文献标识码 : B 文章编号 : 1001 - 3938 (2005) 05 - 0043 - 02 1 STT + CO2 自动焊及控制原理 焊接作为材料连接及成型工艺 ,已成为现代 制造技术中不可缺少的部分。电弧焊仍是众多焊 接工艺中应用最广泛的 ,而气体保护自动焊是电 弧焊较为先进的工艺技术 ,它在长输管道的建设 中已逐步取代手工焊。但是气体保护自动焊尤其 是 CO2 气体保护自动焊有一严重的缺陷 —飞溅。 为减小飞溅的产生 ,人们采取了各种技术手段 ,但 收效甚微 ,使用 TIG焊或 M IG焊高昂的成本阻碍 了这种方法的广泛应用。 为解决这一问题 ,美国林肯公司研制开发了 一类专用于 CO2气体保护焊的电源 ,使用这一电 源能极大减少焊接时的飞溅 ,改善焊缝成型 ,这一 优点已经在工程实践中得到证实 ,使飞溅减少了 80% ～85%。 CO2气体保护焊电源能减少飞溅的根本原因 是采用了 STT (Surface Tension Transfer)控制技 术。大家知道 CO2气体保护焊最大的缺陷是飞 溅 ,飞溅形成的原因是由于 CO2气体保护焊在焊 接时其熔滴过渡的方式是短路过渡 ,即当焊丝与 熔池金属之间形成液态金属“小桥 ”时 ,较大的短 路电流流过逐渐变细的“小桥 ”,产生较大的电阻 热 ,电爆破理论认为短路过程中形成的液态“小 桥 ”被急剧加热 ,过量的能量积累导致液态“小 桥 ”气化爆断 ,引起飞溅。爆炸的能量为液态小 桥中所积聚的总的气化热能 PT , PT =πRB 2 Lq。 式中 RB —爆炸时液态小桥的半径 ; L—液态小桥的长度; q—金属的气化热。 根据电爆破理论 ,电爆破能量主要由在液态 “小桥 ”爆破前 100～150μs内的短路电流所决定 的。所以控制飞溅也就是主要将液态小桥爆破前 150μs内的短路电流迅速减下来。又由于 CO2气 体保护焊的过渡频率在每秒几十次 ,这种积累的 飞溅量很大 ,焊缝成型也受到破坏。STT控制的 焊接方法就是从根本上解决了液态“小桥 ”气化 爆断的问题 ,其核心就是在形成短路“小桥 ”后焊 接电流瞬间减小 ,在表面张力、重力和电磁力作用 下 ,拉断金属“小桥 ”,使熔滴由短路过渡转变为 自由过渡。这种方法其实质就是利用电弧本身作 为传感器来检测电弧电压 ,根据电压来判断熔滴 过渡的瞬时形态 ,从而根据检测到的电弧电压的 变化 ,按照 STT的要求控制瞬时电弧电流的变 化 ,利用表面张力的作用达到熔滴平稳过渡的目 的。STT控制过程示意图见图 1。 2 STT +CO2 自动焊技术在工程中的应用 甬 —沪 —宁进口原油管道工程是由中石化管 焊管 ·第 28卷第 5期 ·2005年 9月 ·43· © 1994-2009 China Academic Journal Electronic Publishing House. All rights reserved. http://www.cnki.net
44 2005年9月 道储运公司承建的国家重点工程,管道全长667 km,管材为L425螺旋埋弧焊管,壁厚为113 mm。在Ⅴ标段施工单位是中原石油勘探局油建 公司,该公司在常规地段采用水平固定位置(5G) 焊接电压 的全自动焊工艺,焊丝采用FR70S-6实心焊丝 焊接电流 焊接电源采用美国林肯公司的STI-Ⅱ几742焊 机,送丝机构采用美国林肯公司的IN-23P送丝 机。焊接工艺参数见表1。 工程实践证实,应用STT控制的CO2气体保 TI T: TaTTs Te 护焊能够极大地减少焊接时的飞溅,焊缝成型美 图1STT控制过程示意图 观,无表面缺陷,焊接合格率达到99% 表1焊接工艺参数 自动球410极性。电么电电压范围N焊接速度/mm)送丝速度八(mm 焊接方法 焊接电流 3.5~3.8 采用SIT+OO2自动焊与普通的O2气体保3结束语 护焊相比,无论是飞溅、焊接时的噪声,还是焊缝 成型均远优于后者。理论上讲,ST控制方法在 STT+OO2自动焊具有高效、节能、抗锈、低 焊接过程中不应有飞溅,或者飞溅量极小,但是在氢、低成本等优点因此,在长输管道及大型储油 实际应用中我们发现仍然有少量的飞溅和“啪 罐的建设中逐渐得到广泛的应用,笔者想通过本 “啪”爆裂声。这说明,在熔滴过渡过程中仍有文向广大读者介绍S+CO2自动焊的一些知 少量的过渡为短路过渡,而不是靠表面张力的作识,相信会对从事焊接工作的工程技术人员有所 用拉断熔滴,在现场无论怎样调整基值电流和峰帮助 值电流,均无法避免这一现象。在查阅了大量资 料及结合现场实际综合分析后认为造成这一现参考文献 象的原因在送丝机构。由于送丝是连续的,连续 的送丝动作抵消了熔滴过渡时部分表面张力的作1横黄石生新型弧焊电源及其智能控制[M]北京:机械 用。现在,美国林肯公司已经根据用户的要求对 工业出版社,2000 [王其隆弧焊过程质量实时传感与控制[M]北京:机 送丝机构作了改进,IN-23P送丝机改进的关键 械工业出版社,2000 点是对送丝速度进行控制,其原理是焊接电源根 据电弧电压的变化,在电弧短路时,给送丝机构一作者简介:范晓明(1973-),男,硕士研究生,工程师,现 个反作用电压,使得瞬时的送丝速度降低,让表面在中国石化集团管道储运分公司鲁宁输油处从事技术工 张力充分发挥作用,这样使得飞溅更小。新型改作,电话)13639484030 进的送丝机构现在已经在仪征-长岭原油管道建 收稿日期:200411-05 设工程中得到应用,效果非常好 修改稿收稿日期:2005-01-08 编辑:罗刚 欢迎订阅欢迎投稿欢迎刊登广告 2 01994-2009 China Academic Journal Electronie Publishing House. All rights reserved hp: /wnwr cnki.net
图 1 STT控制过程示意图 道储运公司承建的国家重点工程 ,管道全长 667 km,管材为 L425 螺旋埋弧焊管 , 壁厚为 11. 3 mm。在 Ⅴ标段施工单位是中原石油勘探局油建 公司 ,该公司在常规地段采用水平固定位置 (5G) 的全自动焊工艺 ,焊丝采用 ER70S - 6实心焊丝 , 焊接电源采用美国林肯公司的 STT - Ⅱ/L742焊 机 ,送丝机构采用美国林肯公司的 LN - 23P送丝 机。焊接工艺参数见表 1。 工程实践证实 ,应用 STT控制的 CO2气体保 护焊能够极大地减少焊接时的飞溅 ,焊缝成型美 观 ,无表面缺陷 ,焊接合格率达到 99%。 表 1 焊接工艺参数 焊接方法 焊丝 型号 直径 /mm 焊接电流 极性 电流 /A 电弧电压范围 /V 焊接速度 / ( cm·min - 1 ) 送丝速度 / ( cm·min - 1 ) 自动焊 ER70S - 6 1. 0 直流反接 130～160 18～20 7～10 3. 5～3. 8 采用 STT + CO2 自动焊与普通的 CO2气体保 护焊相比 ,无论是飞溅、焊接时的噪声 ,还是焊缝 成型均远优于后者。理论上讲 , STT控制方法在 焊接过程中不应有飞溅 ,或者飞溅量极小 ,但是在 实际应用中我们发现仍然有少量的飞溅和“啪 ”、 “啪 ”的爆裂声。这说明 ,在熔滴过渡过程中仍有 少量的过渡为短路过渡 ,而不是靠表面张力的作 用拉断熔滴 ,在现场无论怎样调整基值电流和峰 值电流 ,均无法避免这一现象。在查阅了大量资 料及结合现场实际综合分析后 ,认为造成这一现 象的原因在送丝机构。由于送丝是连续的 ,连续 的送丝动作抵消了熔滴过渡时部分表面张力的作 用。现在 ,美国林肯公司已经根据用户的要求对 送丝机构作了改进 , LN - 23P送丝机改进的关键 点是对送丝速度进行控制 ,其原理是焊接电源根 据电弧电压的变化 ,在电弧短路时 ,给送丝机构一 个反作用电压 ,使得瞬时的送丝速度降低 ,让表面 张力充分发挥作用 ,这样使得飞溅更小。新型改 进的送丝机构现在已经在仪征 - 长岭原油管道建 设工程中得到应用 ,效果非常好。 3 结束语 STT + CO2 自动焊具有高效、节能、抗锈、低 氢、低成本等优点 ,因此 ,在长输管道及大型储油 罐的建设中逐渐得到广泛的应用 ,笔者想通过本 文向广大读者介绍 STT + CO2 自动焊的一些知 识 ,相信会对从事焊接工作的工程技术人员有所 帮助。 参考文献 : [ 1 ]黄石生. 新型弧焊电源及其智能控制 [M ]. 北京 :机械 工业出版社 , 2000. [ 1 ]王其隆. 弧焊过程质量实时传感与控制 [M ]. 北京 :机 械工业出版社 , 2000. 作者简介 :范晓明 ( 1973 - ) ,男 ,硕士研究生 ,工程师 ,现 在中国石化集团管道储运分公司鲁宁输油处从事技术工 作 , (电话 ) 13639484030。 收稿日期 : 2004 - 11 - 05 修改稿收稿日期 : 2005 - 01 - 08 编辑 :罗 刚 欢迎订阅 欢迎投稿 欢迎刊登广告 ·44· 焊 管 2005年 9月 © 1994-2009 China Academic Journal Electronic Publishing House. All rights reserved. http://www.cnki.net
英文摘要 第28卷第5期 model of sp line finite strp method based on MultiA gent, which will lay the stable fundation for researching material oller bend fomation theory and optm izing pass design Key words: Agent spline finite strp; bandw idth directin, olled directon, strp elment knot line Pressure and co,/H s Corrosion Ra tes ofo il Tube Stee ls ZHANG Q ing, L IQuan-an, WEN Jiu-ba, BA I Zhen-quan Abstract i:1001-3938(2005)05-0024A Abstract: A autoclave, bge ther with weight bss method and SE, is used b study Co,/H, S cormsion behavor of oil tube steels N80 and P110 at d ifferent CO, partial p ressure(45p si, 135psi, 225psi, 315 psi) and different H, S partial pressure(Q 2psi, 3psi 9psi, 18p si). The results show that their CO2/H, S corrosin rates increase with C02 partial p ressure and increase at first and then decreases with H,S partial pressure and the peaks appear at psi of H,S partial pressure Key words: CO2 partial pressure, steel N80; steel P1 10: C02/H,S corSon rate Ultra son ic W elding M echan im for Copper/A lum inum Fi to Copper Tube YANG Shengwen, TANG Yong Abstract i:1001-3938(2005)05-028EA Abstract: h this paper, the mechanism of ultrason ic we ld ing is stud ied based on the copper fin b copper tube experment By an alyzing the heat p oduced during the weld pocess and the SEM metalbgraph, the mechanism of ultrasonic welding is stud ied It can be said that the ultrason ic weld ing is a physical metallurgy pmcess consists of mechanical am bement, and bond ing that based on the pint of the pure metal, the m icm"surface melting b fom bond ing Key words: the mechanism of ultrason ic welding bond ing heat temperature increase Probe on Roller Dummy Manufacture Technology YANG Xian. ZHAO Zhen-xue. WANg Junwe Abstract n:1001-3938(2005)05-032-EA Abstract: Roller dummy manufac ture is b use dummy olling unit model, dummy strp and dummy mller b m itate likelihood existed problem of the functon, p operty of mller and manufac ture, ete b carry out ollermanufacturing po integrated use copying, mode ling and analyzing techno bgy as well as tools The article presents the definiton, classificatin of oIl- er dummy manufac turing technobgy, describes the characteristics of oller dummy manufacturing techno bgy, and discusses the modeling, emulation and dummy p raxis techno bgy of mller dummy manufacture fiom the point view of welded p pe manufacture industry Key words: welded ppe, roller, dummy manufac turing techno bgy, emulaton techno bgy, modeling A Data Process System Based on a B rser i lportM CU for M ea sur ing of Sp ira lw elded Pipe s Profile LIKar-jin, CHEN Q iang, ZHANG Yong, DONG Pei-chen Abstract d:1001-3938(2005)05-0035-EA bstract: Some parameters, such as permeter, diameter, is very mportant quality of sp iral welded p pe a data pocess system is established in this paper This process system can be used b measure shape and size of spiral welded ppe 's pofile The data process system features with a bi-serialported MCU 77E58, with receives serial data with one serial port, processes the data, dis- p lays some results and saves them in USB flash disk with another serial port synchronously Key words: data process, brserialport sp iral welded ppe; measure; pofile The Project Design for h telligence Con trol System of Spiralw elded Pipe GUO L iang, ZHANG Hua, CA I Zhiyong Abstract d:1001-3938(2005)05-0039-EA Abstract: An ntelligence control system br SpiralW elded Ppe was introduced in this paper h app licaton and practice, the sys- m has progressed in resist disturbance, convulsion, dust and fit for the request of project Key words: spiral welded ppe; nested industrial camputer, contol system; project design STT+CO, Autom a tie w elding techno logy FAN XIaom ing A bstract:1001-3938(2005)05-0043-EA Abstract: It describes STT +CO2 aukmatic weld ing techno bgy from wo aspects of STT contol princ p le and app licaton amed b serious defects-sp lash existed with CO2 gas p rotective automatic weld ing The project practice app oves that to app ly co2 gas p otect automatic weld ing controlled by STT can greatly reduce the sp lash during welding and welded seam appears perfect To urred a little sp lash phenamena and crep itating by adop ting crude oil pipeline project and indicate that the rational contol of feed ing wire speed by feed ing wire unit ofUS LN- 23P is the key b mp ove this phenamena The mp oved feed ing wire mechanism app lied b YiZheng-Changling crude oil p pe line construc- tion project and ga ined good eflect 201994-2009ChinaAcademicJournalElectronicPublishingHouseAllrightsreservedhttp://vw.cnki.nter
model of sp line finite strip method based on Multi2Agent,which will lay the stable foundation for researching material roller bend deformation theory and op timizing pass design. Key words:Agent; sp line finite strip; bandwidth direction; rolled direction; strip element knot line Pressure and CO2 /H2 S Corrosion Ra tes of O il Tube Steels ZHANG Q ing,L IQuan2an,W EN Jiu2ba,BA I Zhen2quan Abstract ID : 100123938 (2005) 05200242EA Abstract:A autoclave, together with weight loss method and SEM, is used to study CO2 /H2 S corrosion behavior of oil tube steels N80 and P110 at different CO2 partial p ressure (45p si, 135p si, 225p si, 315 p si) and different H2 S partial p ressure (0. 2p si, 3p si, 9p si, 18p si). The results show that their CO2 /H2 S corrosion rates increase with CO2 partial p ressure and increase at first and then decreases with H2 S partial p ressure and the peaks appear at 3p si of H2 S partial p ressure. Key words:CO2 partial p ressure; steel N80; steel P110; CO2 /H2 S corrosion rate Ultra son ic W elding M echanism for Copper /A lum inum F in to Copper Tube YANG Sheng2wen, TANG Yong Abstract ID : 100123938 (2005) 05200282EA Abstract: In this paper, the mechanism of ultrasonic welding is studied based on the copper fin to copper tube experiment. By an2 alyzing the heat p roduced during the weld p rocess and the SEM metallograph, the mechanism of ultrasonic welding is studied. It can be said that the ultrasonic welding is a physicalmetallurgy p rocess consists ofmechanical embedment, and bonding that based on the joint of the pure metal, the micro2surface melting to form bonding. Key words: the mechanism of ultrasonic welding; bonding; heat; temperature increase Probe on Roller D umm y M anufacture Technology YANG Xian, ZHAO Zhen2xue,WANG Jun2wei Abstract ID : 100123938 (2005) 05200322EA Abstract:Roller dummy manufacture is to use dummy rolling unit model, dummy strip and dummy roller to im itate and estimate likelihood existed p roblem of the function, p roperty of roller and manufacture, etc. to carry out rollermanufacturing p rocess through integrated use copying,modeling and analyzing technology aswell as tools. The article p resents the definition, classification of roll2 er dummy manufacturing technology, describes the characteristics of roller dummy manufacturing technology, and discusses the modeling, emulation and dummy p raxis technology of roller dummy manufacture from the point view of welded p ipe manufacture industry. Key words:welded p ipe; roller; dummy manufacturing technology; emulation technology; modeling A Da ta Process System Ba sed on a Bi2ser ia l2portMCU for M ea sur ing of Spira lW elded P ipe’s Profile L I Kai2jin, CHEN Q iang, ZHANG Yong,DONG Pei2chen Abstract ID : 100123938 (2005) 05200352EA Abstract: Some parameters, such as perimeter, diameter, is very important to quality of sp iral welded p ipe. A data p rocess system is established in this paper. This p rocess system can be used to measure shape and size of sp iral welded p ipe’s p rofile. The data p rocess system features with a bi2serial2ported MCU 77E58,with receives serial data with one serial port, p rocesses the data, dis2 p lays some results and saves them in USB flash disk with another serial port synchronously. Key words: data p rocess; bi2serial2port; sp iral welded p ipe; measure; p rofile The Project D esign for Intelligence Control System of Spira lW elded Pipe GUO Liang, ZHANG Hua, CA I Zhi2yong Abstract ID : 100123938 (2005) 05200392EA Abstract:An intelligence control system for Sp iralW elded Pipe was introduced in this paper. In app lication and p ractice, the sys2 tem has p rogressed in resist disturbance, convulsion, dust and fit for the request of p roject. Key words: sp iral welded p ipe; nested industrial computer; control system; p roject design STT + CO2 Automa tic W elding Technology FAN Xiao2m ing Abstract ID : 100123938 (2005) 05200432EA Abstract: It describes STT +CO2 automatic welding technology from two aspects of STT control p rincip le and app lication aimed to the serious defects———sp lash existed with CO2 gas p rotective automatic welding. The p roject p ractice app roves that to app ly CO2 gas p rotect automatic welding controlled by STT can greatly reduce the sp lash duringwelding and welded seam appears perfect. To analyze still occurred a little sp lash phenomena and crep itating by adop ting this welding technology to Yong2Hu2N ing imported crude oil p ipeline p roject and indicate that the rational control of feeding wire speed by feeding wire unit of US LN - 23P is the key to imp rove this phenomena. The imp roved feeding wire mechanism app lied to YiZheng2Changling crude oil p ipeline construc2 tion p roject and gained good effect. ·90· 英 文 摘 要 第 28卷第 5期 © 1994-2009 China Academic Journal Electronic Publishing House. All rights reserved. http://www.cnki.net
焊管·第28卷第5期·2005年9月 91 Key words: STT control princ p le; CO2 gas p m tect automatic we ing weld ing current weld ing speed; feed ing wire speed A pplia tion of B g Character Stenciling Un it on Pipe Production WEIJing WANGQ ian-hua, ZHU W Abstract i:1001-3938(2005)05-045EA Applica tion on Pipe Qua lity of Certifica tion with V isua l FoxPro 0 Software ZHU Da Abstract d:1001-3938(2005)05-0047-EA Abstract: Ppe quality of certificate is an mportant document of enterpriser b issue product quality certification t end user It in troduces b app ly v isual FoxPo 0 sofware and carry out program design b quality control infomatin system b realize system zaton of p roduct quality contol infomation as per the requirement of p pe quality of certificate of sp iral submerged arc welded ppe for West-to-East gas transm isson project Key words: quality of certificate, system design, Visual FoxPD 0 sofware; app licat A pplica tion of Ph sma welding System on Sta in less Steel elded Pipe CHEN Guo-yu, LD YLWANGLin-lin, CHEN Chun-yang Abstract:1001-3938(2005)050051-EA Abstract: It is described the advantage of p lama weld ing princ p le and welding p ocess and analyzed the p operties of key campo- nent among p lasma welding system It is introduced some welding p rocess parameter of p lama weld ing system and its effect on practice app licaton during stainless steel welded ppe Key words: stainless steel welded p pe, plasma welding equpment, application Structure Pric iple ana lysis to side burr Rem ov ing Un it for L ong itud ina Iw elded Pip KANG Xian ing Abstract D:1001-3938(2005)05-0054-EA Key words: bngitud inal welded ppe: inside burr, inside burr removing unit knife p ofike; structure; analysis Study on Hotrolling Process of x70 Thick Coils GUO B in, SONG Ping, ZHENG L in, WEI Gang-cheng, KONG Jun-hua WEN Dun. ZHANG Chao. L I Changm ing Abstract i:1001-3938(2005)05-0056-EA Abstract: Hotrolling p rocess of X70 thick coils was studied in this paper, and it was concluded that increasing the cooling rate, fine reducton and finish coiling temperature would be helful t the fom ing of acicular ferrite and mp oving of steel strength and toughness, in reverse, extra high or bw finish olling temperature would be ham ful b them. By taking reasonable hot-rolling process, the m ic struc ture of X70 productin wasmainly acicular ferrite, and its strength and bughness were good enough b satisfy the requirment of"Technical A greement of Hot-ollng Coils for Ppe manufacturng ofwest to East Gas Transporting Project Key words: X70 steel hotmolling process contol olling and contol cooling Pa ss design with helmed Set for Shuttle Pipe CAO GuO-fu Abstract I:1001-3938(2005)050061-EA Abstract: It is intoduced that inclined set design method of pass design for shuttle p pe and exp lains that pass design with in clined set fr shuttle p pe has excellence of contolled weld seam positin and y angle of pipe tail as well as not easily tearing burr to the edges of pass b make longer usage life of oilers, etc. It puts forard some fresh design princ p le These design prince le also has use for reference b design pass of other rectangular ppe Key words: shuttling p pe, oller pass, inclined angle, design m proven en t on Pipe Expanding Process and Research on hcrea sing Expand ng Head L ife L I Hong Abstract l:1001-3938(2005)05-0066-EA Abstract: It puts foward reasonable adjusment b each parameter, mp ovement b pocess method, strengthen ing fricton lubrica" tion and ratnal operation to reach the purpose of increasing usage life of expand ing head of expander through analysis b ppe ex pand ing process Key words p pe expand ing expand ing process, expand ng head; usage life hvestiga te i the a u toma tism a m at am or pl te a te Cen tre WEIHai-xiang. L I Cui-hua Abstract i:1001-3938(2005)05-0069-EA Abstract: htroduce the automatism am at amor p late center recite the work elments and machine and electrocircuit desig 201994-2009cHinaaCademicJournalElectronicPublishingHouseAllrightsreservedhtp//www.cnki.net
Key words: STT control p rincip le; CO2 gas p rotect automatic welding; welding current; welding speed; feeding wire speed Applica tion of Big Character Stenc iling Unit on P ipe Production W EIJing,WANG Q ian2hua, ZHU Wei Abstract ID : 100123938 (2005) 05200452EA Key words: big character stenciling unit; p rincip le; p roperty; technical parameter; app lication effect Applica tion on Pipe Qua lity of Certifica tion w ith V isua l FoxPro6. 0 Software ZHU Da2quan,WANG Shu2ren Abstract ID : 100123938 (2005) 05200472EA Abstract: Pipe quality of certificate is an important document of enterp riser to issue p roduct quality certification to end user. It in2 troduces to app ly V isual FoxPro6. 0 software and carry out p rogram design to quality control information system to realize system2 ization of p roduct quality control information as per the requirement of p ipe quality of certificate of sp iral submerged arc welded p ipe forW est2to2East gas transmission p roject. Key words: quality of certificate; system design; V isual FoxPro6. 0 software; app lication Applica tion of Pla sma W elding System on Sta inless SteelW elded P ipe CHEN Guo2yu,L IU Yi,WANG L in2lin, CHEN Chun2yang Abstract ID : 100123938 (2005) 05200512EA Abstract: It is described the advantage of p lasma welding p rincip le and welding p rocess and analyzed the p roperties of key compo2 nent among p lasma welding system. It is introduced some welding p rocess parameter of p lasma welding system and its effect on p ractice app lication during stainless steel welded p ipe. Key words: stainless steel welded p ipe; p lasma welding; equipment; app lication Structure Pr inc iple Ana lysis to Inside Burr Rem ov ing Un it for Long itudina lW elded P ipe KANG Xia2m ing Abstract ID : 100123938 (2005) 05200542EA Key words: longitudinal welded p ipe; inside burr; inside burr removing unit; knife p rofile; structure; analysis Study on Hot2rolling Process of X70 Thick Co ils GUO B in, SONG Ping, ZHENG L in,W E I Gang2cheng, KONG Jun2hua, W EN Dun, ZHANG Chao,L IU Chang2m ing Abstract ID : 100123938 (2005) 05200562EA Abstract:Hot2rolling p rocess of X70 thick coils was studied in this paper, and it was concluded that increasing the cooling rate, fine reduction and finish coiling temperature would be helpful to the form ing of acicular ferrite and imp roving of steel strength and toughness, in reverse, extra high or low finish rolling temperature would be harmful to them. By taking reasonable hot2rolling p rocess, the m icrostructure of X70 p roduction wasmainly acicular ferrite, and its strength and toughnesswere good enough to satisfy the requirement of“Technical Agreement of Hot2rolling Coils for Pipe Manufacturing ofW est to East Gas Transporting Project”. Key words:X70 steel; hot2rolling p rocess; control rolling and control cooling Pa ss D esign w ith Inclined Set for Shuttle P ipe CAO Guo2fu Abstract ID : 100123938 (2005) 05200612EA Abstract: It is introduced that inclined set design method of pass design for shuttle p ipe and exp lains that pass design with in2 clined set for shuttle p ipe has excellence of controlled weld seam position andγangle of p ipe tail aswell as not easily tearing burr to the edges of pass to make longer usage life of rollers, etc. . It puts forward some fresh design p rincip le. These design p rincip le also has use for reference to design pass of other rectangular p ipe. Key words: shuttling p ipe; roller pass; inclined angle; design Im provem ent on P ipe Expanding Process and Research on Increa sing Expanding Head L ife L I Hong Abstract ID : 100123938 (2005) 05200662EA Abstract: It puts forward reasonable adjustment to each parameter, imp rovement to p rocess method, strengthening friction lubrica2 tion and rational operation to reach the purpose of increasing usage life of expanding head of expander through analysis to p ipe ex2 panding p rocess. Key words:p ipe expanding; expanding p rocess; expanding head; usage life Investiga te in the Automa tism A im a t Arm or Pla te A te Centre WE I Hai2xiang,L IU Cui2hua Abstract ID : 100123938 (2005) 05200692EA Abstract: Introduce the automatism aim at armor p late center. Recite the work elements and machine and electrocircuit design 焊管 ·第 28卷第 5期 ·2005年 9月 ·91· © 1994-2009 China Academic Journal Electronic Publishing House. All rights reserved. http://www.cnki.net