鋼筋電渣焊施工工藝

1、yuan, an increase of 17.5%; local government general budget revenue of 500 million yuan, . painting, model culture creates new ma church community, creating lake scenic spot culture education base, received high evaluation from provincial and municipal discipline inspection commission, the peoples d

2、aily special report. constantly promote independent commission against corruption culture construction to rural extends, created established dahlin rural industry park independent commission against corruption culture positions, formed has a support service low double excellent of members lead team,

3、 constantly perfect and established park funds assets management, and village audit supervision, and villagers democratic financial, system, strengthening park party, and chief, and financial, full public, powerful to guarantees has new rural construction, by city rural style clean government inspec

4、tion unit led of height evaluation. through the implementation of honest and clean government cultural construction, and effectively educate the broad masses of party members and cadres and consciously regulated behavior and discipline, honesty in politics and culture to create a good atmosphere and

5、 fresh development environment. although we in implement implementation independent commission against corruption guidelines aspects made has must effectiveness, but away from superior of requirements also exists must of distance, main performance for: a is system enough sound, education, and superv

6、ision, and prevention, and punishment, aspects long-term mechanism also enough perfect, especially in enrollment bid work regulatory aspects also needed strengthening; ii is regulatory supervision exists lost of yu wide, and lost of yu soft, investigation illegal disciplinary case of efforts also ne

7、eded strengthening, individual sector and cadres also different degree exists treat gift, not to benefits not do, and mess do of phenomenon; three for honest work is the new situations and new problems in finding timely enough, treatment measures are not strong enough. to solve these problems, we wi

8、ll proceed from the following five aspects of rectification, make sure to implement the provisions of the code. (a) deepening the learning, enhance the consciousness of honesty in politics. to create event as an opportunity to excel and learning party, further increasing the governance capability an

9、d advanced construction, reinforced rules of the broad masses of party members and cadres awareness, sense of responsibility, sense of honor, improve working ability and level of scientific development. should make full use of meetings, in particular central group learning opportunity, further stren

10、gthening the study and education of the code, the intensive warning education, education the majority of party members and cadres known fear, knew fear, honesty in politics of tension the strings, consciousness and enhancing the implementation of the initiative. also, pay attention to apply what the

11、y have learned, consciously study results into planning work, new ideas,鋼筋電渣壓力焊工藝標(biāo)準(zhǔn)1 范圍 本工藝標(biāo)準(zhǔn)適用于工業(yè)與民用建筑現(xiàn)澆鋼筋混凝土結(jié)構(gòu)中直徑1440mm的i級豎向或斜向(傾斜度4：1范圍內(nèi))鋼筋的連接。2 施工準(zhǔn)備2.1 材料及主要機具：2.1.1 鋼筋：鋼筋的級別、直徑必須符合設(shè)計要求，有出廠證明書及復(fù)試報告單。進口鋼筋還應(yīng)有化學(xué)復(fù)試單，其化學(xué)成分應(yīng)滿足焊接要求，并應(yīng)有可焊性試驗。2.1.2 焊劑2.1.2.1焊劑的性能應(yīng)符合gb5293碳素鋼埋弧焊用焊劑的規(guī)定。焊劑型號為hj401，常用的為熔煉型高錳

12、高硅低氟焊劑或中錳高硅低氟焊劑。2.1.2.2 焊劑應(yīng)存放在干燥的庫房內(nèi)，防止受潮。如受潮，使用前須經(jīng)250300烘焙2h。2.1.2.3 使用中回收的焊劑，應(yīng)除去熔渣和雜物，并應(yīng)與新焊劑混合均勻后使用。2.1.2.4 焊劑應(yīng)有出廠合格證。2.1.3 主要機具2.1.3.1 手工電渣壓力焊設(shè)備包括：焊接電源、控制箱、焊接夾具、焊劑罐等。2.1.3.2 自動電渣壓力焊設(shè)備(應(yīng)優(yōu)先采用)包括：焊接電源、控制箱、操作箱、焊接機頭等。2.1.3.3 焊接電源。鋼筋電渣壓力焊宜采用次級空載電壓較高(tsv以上)的交流或直流焊接電源。(一般32mm直徑及以下的鋼筋焊接時，可采用容量為600a的焊接電源；3

13、2mm直徑及以上的鋼筋焊接時，應(yīng)采用容量為1000a的焊接電源)。當(dāng)焊機容量較小時，也可以采用較小容量的同型號，同性能的兩臺焊機并聯(lián)使用。2.2 作業(yè)條件2.2.1 焊工必須持有有效的焊工考試合格證。2.2.2 設(shè)備應(yīng)符合要求。焊接夾具應(yīng)有足夠的剛度，在最大允許荷載下應(yīng)移動靈活，操作方便。焊劑罐的直徑與所焊鋼筋直徑相適應(yīng)，不致在焊接過程中燒壞。電壓表、時間顯示器應(yīng)配備齊全，以便操作者準(zhǔn)確掌握各項焊接參數(shù)。2.2.3 電源應(yīng)符合要求，當(dāng)電源電壓下降大于5%，則不宜進行焊接。2.2.4 作業(yè)場地應(yīng)有安全防護措施，制定和執(zhí)行安全技術(shù)措施，加強焊工的勞動保護，防止發(fā)生燒傷、觸電、火災(zāi)、爆炸以及燒壞機器

14、等事故。2.2.5 注意接頭位置，注意同一區(qū)段內(nèi)有接頭鋼筋截面面積的百分比，不符合混凝土結(jié)構(gòu)工程施工及驗收規(guī)范有關(guān)條款的規(guī)定時，要調(diào)整接頭位置后才能施焊。3 操作工藝3.1 工藝流程：檢查設(shè)備、電源鋼筋端頭制備 選擇焊接參數(shù) 安裝焊接夾具和鋼筋 安放鐵絲球(也可省去) 安放焊劑罐、填裝焊劑 試焊、作試件 確定焊接參數(shù) 施焊 回收焊劑 卸下夾具 質(zhì)量檢查 3.1.1 電渣電力焊的工藝過程：閉合電路 引弧 電弧過程 電渣過程 擠壓斷電3.2 檢查設(shè)備、電源、確保隨時處于正常狀態(tài)，嚴(yán)禁超負(fù)荷工作。3.3 鋼筋端頭制備：鋼筋安裝之前，焊接部位和電極鉗口接觸的(150mm區(qū)段內(nèi))鋼筋表面上的銹斑、油污、

15、雜物等，應(yīng)清除干凈，鋼筋端部若有彎折、扭曲，應(yīng)予以矯直或切除，但不得用錘擊矯直。3.4 選擇焊接參數(shù)：鋼筋電渣壓力焊的焊接參數(shù)主要包括：焊接電流、焊接電壓和焊接通電時間，參見表423。不同直徑鋼筋焊接時，按較小直徑鋼筋選擇參數(shù)，焊接通電時間延長約10%。鋼筋電渣壓力焊焊接參數(shù) 表423 鋼筋直徑(mm)焊接電流(a)焊接電壓(v)焊接通電時間(s)電弧過程u2-1電渣過程u2-2電弧過程t1電渣過程t2161820222528323640200250250300300350350400400450500550600650700750850-900404540454045404540454045

16、4045404540452227222722272227222722272227222722271415171821242730334556667893.5 安裝焊接夾具和鋼筋：夾具的下鉗口應(yīng)夾緊于下鋼筋端部的適當(dāng)位置，一般為1/2焊劑罐高度偏下510mm，以確保焊接處有足夠的淹埋深度。上鋼筋放入夾具鉗口后，調(diào)準(zhǔn)動夾頭的起始點，使上下鋼筋的焊接部位位于同軸狀態(tài)，方可夾緊鋼筋。鋼筋一經(jīng)夾緊，嚴(yán)防晃動，以免上下鋼筋錯位和夾具變形。3.6 安放引弧用的鐵絲球(也可省去)。安放焊劑罐、填裝焊劑。3.7 試焊、作試件、確定焊接參數(shù)：在正式進行鋼筋電渣壓力焊之前，必須按照選擇的焊接參數(shù)進行試焊并作試件送試

17、，以便確定合理的焊接參數(shù)。合格后，方可正式生產(chǎn)。當(dāng)采用半自動、自動控制焊接設(shè)備時，應(yīng)按照確定的參數(shù)設(shè)定好設(shè)備的各項控制數(shù)據(jù)，以確保焊接接頭質(zhì)量可靠。3.8 施焊操作要點。3.8.1 閉合回路、引弧：通過操縱桿或操縱盒上的開關(guān)，先后接通焊機的焊接電流回路和電源的輸入回路，在鋼筋端面之間引燃電弧，開始焊接。3.8.2 電弧過程：引燃電弧后，應(yīng)控制電壓值。借助操縱桿使上下鋼筋端面之間保持一定的間距，進行電弧過程的延時，使焊劑不斷熔化而形成必要深度的渣池。3.8.3 電渣過程：隨后逐漸下送鋼筋，使上鋼筋端部插入渣池，電弧熄滅，進入電渣過程的延時，使鋼筋全斷面加速熔化。3.8.4 擠壓斷電：電渣過程結(jié)束

18、，迅速下送上鋼筋，使其端面與下鋼筋端面相互接觸，趁熱排除熔渣和熔化金屬。同時切斷焊接電源。3.8.5 接頭焊畢，應(yīng)停歇20-30s后(在寒冷地區(qū)施焊時，停歇時間應(yīng)適當(dāng)延長)，才可回收焊劑和卸下焊接夾具。3.9 質(zhì)量檢查：在鋼筋電渣壓力焊的焊接生產(chǎn)中，焊工應(yīng)認(rèn)真進行自檢，若發(fā)現(xiàn)偏心、彎折、燒傷、焊包不飽滿等焊接缺陷，應(yīng)切除接頭重焊，并查找原因，及時消除。切除接頭時，應(yīng)切除熱影響區(qū)的鋼筋，即離焊縫中心約為1.1倍鋼筋直徑的長度范圍內(nèi)的部分應(yīng)切除。4 質(zhì)量標(biāo)準(zhǔn)4.1 保證項目：4.1.1 鋼筋的品種和質(zhì)量，必須符合設(shè)計要求和有關(guān)標(biāo)準(zhǔn)的規(guī)定。注：進口鋼筋需先經(jīng)過化學(xué)成分檢驗和焊接試驗，符合有關(guān)規(guī)定后方

19、可焊接。檢驗方法：檢查出廠質(zhì)量證明書和試驗報告單。4.1.2 鋼筋的規(guī)格，焊接接頭的位置，同一區(qū)段內(nèi)的接頭鋼筋面積的百分比，必須符合設(shè)計要求和施工規(guī)范的規(guī)定。檢驗方法：觀察或尺量檢查。4.1.3 電渣壓力焊接頭的力學(xué)性能檢驗必須合格。力學(xué)性能檢驗時，從每批接頭中隨機切取3個接頭作拉伸試驗。4.1.3.1 在一般構(gòu)筑物中，以300個同鋼筋級別接頭作為一批。4.1.3.2 在現(xiàn)澆鋼筋混凝土多層結(jié)構(gòu)中，以每一樓層或施工區(qū)段的同級別鋼筋接頭作為一批，不足300個接頭仍作為一批。檢驗方法：檢查焊接試件試驗報告單。4.2 基本項目：鋼筋電渣壓力焊接頭應(yīng)逐個進行外觀檢查，結(jié)果應(yīng)符合下列要求：4.2.1 焊包

20、較均勻，突出部分最少高出鋼筋表面4mm.4.2.2 電極與鋼筋接觸處，無明顯的燒傷缺陷。4.2.3 接頭處的彎折角不大于4度。4.2.4 接頭處的軸線位移應(yīng)不超過0.1倍鋼筋直徑，同時不大于2mm。外觀檢查不合格的接頭應(yīng)切除重焊、或采取補救措施。檢驗方法：目測或量測。5 成品保護接頭焊畢，應(yīng)停歇2030s后才能卸下夾具，以免接頭彎折。6 應(yīng)注意的質(zhì)量問題6.1 在鋼筋電渣壓力焊生產(chǎn)中，應(yīng)重視焊接全過程中的任何一個環(huán)節(jié)。接頭部位應(yīng)清理干凈；鋼筋安裝應(yīng)上下同心；夾具緊固，嚴(yán)防晃動；引弧過程，力求可靠；電弧過程，延時充分；電渣過程，短而穩(wěn)定；擠壓過程，壓力適當(dāng)。若出現(xiàn)異?，F(xiàn)象，應(yīng)參照表424查找原因

21、，及時清除。鋼筋電渣壓力焊接頭焊接缺陷與防止措施 表424 項次焊接缺陷防止措施1軸線偏移1 矯直鋼筋端部2 正確安裝夾具和鋼筋3 避免過大的擠壓力4 及時修理或更換夾具2彎折1 矯直鋼筋端部2 注意安裝與扶持上鋼筋3 避免焊后過快卸夾具4 修理或更換夾具3焊包薄而大1 減低頂壓速度2 減小焊接電流3 減少焊接時間4咬邊1減小焊接電流2縮短焊接時間3注意上鉗口的起始點，確保上鋼筋擠壓到位5未焊合1 增大焊接電流2 避免焊接時間過短3 檢修夾具，確保上鋼筋下送自如6焊包不勻1 鋼筋端面力求平整2 填裝焊劑盡量均勻3 延長焊接時間，適當(dāng)增加熔化量7氣孔1 按規(guī)定要求烘焙焊劑2 清除鋼筋焊接部位的鐵

22、銹3 確保被焊處在焊劑中的埋入深度8燒傷1 鋼筋導(dǎo)電部位除凈鐵銹2 盡量夾緊鋼筋9焊包下淌1 徹底封堵焊劑罐的漏孔2 避免焊后過快回收焊劑6.2 電渣壓力焊可在負(fù)溫條件下進行，但當(dāng)環(huán)境溫度低于20時，則不宜進行施焊。雨天、雪天不宜進行施焊，必須施焊時，應(yīng)采取有效的遮蔽措施。焊后未冷卻的接頭，應(yīng)避免碰到冰雪。7 質(zhì)量記錄本工藝標(biāo)準(zhǔn)應(yīng)具備以下質(zhì)量記錄：7.1 鋼筋出廠質(zhì)量證明書或試驗報告單。7.2 焊劑合格證。7.3 鋼筋機械性能復(fù)試報告。7.4 進口鋼筋應(yīng)有化學(xué)成分檢驗報告和可焊性試驗報告。國產(chǎn)鋼筋在加工過程中發(fā)生脆斷、焊接性能不良和機械性能明顯不正常的，應(yīng)有化學(xué)成分檢驗報告。7.5 鋼筋接頭的

23、拉伸試驗報告。new measures to promote work, the courage to take responsibility, dare to break hard to ensure district, government decisions and arrangements to implement. (b) strengthening supervision, severely punish acts of violation. one is to open the channels of supervision. vigorously promote the par

24、ty affairs public, open, widely accepted supervision by the masses, pay attention to social groups and public opinion supervision, the powerful force formed to urge party members and leading cadres properly exercise their powers. second, strong supervision and inspection. democratic life into full p

25、lay, important briefings, reports related to personal matters and evaluation of cadres study of inner-party supervisory system, a comprehensive grasp of guidelines for the implementation of the independent commission against corruption-related cases of leading cadres of party members, focus on stren

26、gthening key areas of project selection, funding, officials monitor, detect and rectify the problem, promote honesty in politics. third, strengthen disciplinary investigation. seriously the implementation of ji .recently, the county leading bodies at the county level to carry out three trees practic

27、e, which is to improve the governing ability and promoting the development of xx effective measure. i carefully follow your deployment requirements, and actively participate in the three trees campaign. read group, prepared by the department in the near future of the ideological and political constr

28、uction of leading cadres in the city reader, read the relevant information, larger harvest, inspired. i think the ability of repelling is to strengthen the partys governing capacity in questions of the construction of meaning, an important topic remains in front of party members and cadres at all le

29、vels, we need to further explore and ponder. the ability of repelling the name suggests, is asking party members and cadres at all levels in particular, leading cadres at all levels, not only ourselves, establish a correct concept of the independent commission against corruption, political integrity, self-disci