WO2016110159A1 - 四辊卷板机机架裂纹的焊接修复方法 - Google Patents

四辊卷板机机架裂纹的焊接修复方法 Download PDF

Info

Publication number
WO2016110159A1
WO2016110159A1 PCT/CN2015/094429 CN2015094429W WO2016110159A1 WO 2016110159 A1 WO2016110159 A1 WO 2016110159A1 CN 2015094429 W CN2015094429 W CN 2015094429W WO 2016110159 A1 WO2016110159 A1 WO 2016110159A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
crack
weld
repairing
frame
Prior art date
Application number
PCT/CN2015/094429
Other languages
English (en)
French (fr)
Inventor
江琳
Original Assignee
江苏江海机床集团有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏江海机床集团有限公司 filed Critical 江苏江海机床集团有限公司
Publication of WO2016110159A1 publication Critical patent/WO2016110159A1/zh

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • B23P6/04—Repairing fractures or cracked metal parts or products, e.g. castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding

Definitions

  • the invention relates to a welding repairing method for a crack of a four-roll bending machine frame, and belongs to the technical field of machinery.
  • the coiling machine is a general-purpose equipment for bending a metal sheet into a curved or cylindrical workpiece, and can roll a certain range of tapered workpieces by means of an auxiliary device.
  • the products are widely used in shipbuilding, petroleum, chemical, hydropower, machinery manufacturing. And other industries.
  • the four-roll bending machine has become one of the trends in the development of the future rolling machine due to its advantages of one-roll forming and easy numerical control.
  • the frame is the main bearing member of the four-roll bending machine as a load, and the force is complicated, which is one of the main components of the bending machine.
  • the existing four-roller reeling machine frame is overloaded due to work, and cracks may occur, which may cause the bubbling machine to be unable to be used normally, which may affect the normal production, such as re-purchasing, which may result in waste of resources. If you want to repair, due to the high carbon content of the frame, the weldability is poor.
  • the heat-affected zone produces a hard and brittle martensite structure, which is easy to crack.
  • a considerable number of mothers are welded. The material will melt into the weld and increase its carbon content, which is prone to weld hot cracks.
  • the object of the present invention is to overcome the deficiencies of the technology and to provide a welding repairing method for a four-roll bending machine frame crack.
  • the welding repairing method for the crack of the four-roll bending machine frame of the present invention comprises the following steps:
  • Preheating preheating the cracks and surrounding parts of the weldment with an oxyacetylene flame, and covering the entire workpiece with asbestos cloth, and welding when the temperature reaches 80-100 degrees;
  • Post-weld heat treatment Each weld heat treatment is heated by electric heater. Heating width: not less than 500mm on both sides of the weld, heating temperature 600-650 °C, heat preservation for 3 hours. Used to eliminate residual stress.
  • the electrode is baked at 200-350 degrees Celsius for 1-1.5 hours before use, and stored in an oven, and used as needed;
  • the cracked portions of the frame are welded in a plurality of sections, and the symmetric segment jump welding is used in the welding.
  • steps 1) to 3) are repeated several times, and if cracks, pores and slag inclusion defects are found after the completion of the welding, steps 1) to 3) are continued until there is no defect.
  • the invention has the following technical effects: the repaired frame can be restored to normal use, and can basically reach or approach the original level. Good results, normal operation, greatly saving time and cost.
  • the welding repairing method for the crack of the four-roll bending machine frame of the present invention comprises the following steps:
  • Preheating preheating the cracks and surrounding parts of the weldment with an oxyacetylene flame, and covering the entire workpiece with asbestos cloth, and welding when the temperature reaches 80-100 degrees;
  • Post-weld heat treatment Each weld heat treatment is heated by electric heater. Heating width: not less than 500mm on both sides of the weld, heating temperature 600-650 °C, heat preservation for 3 hours. Used to eliminate residual stress.
  • the electrode is baked at 200-350 degrees Celsius for 1-1.5 hours before use, and stored in an oven, and used as needed;
  • the cracked portions of the frame are welded in a plurality of sections, and the symmetric segment jump welding is used in the welding.
  • the repaired rack can be returned to normal use and can be at or near the original level.

Abstract

一种四辊卷板机机架裂纹的焊接修复方法，包括如下步骤：1）打磨：2）预热；3）施焊；4）焊后热处理；5）焊后磨平焊缝。利用该焊接修复方法，经修复后的机架可恢复正常使用，能基本上达到或接近原来的水平。

Description

四辊卷板机机架裂纹的焊接修复方法 技术领域
本发明涉及四辊卷板机机架裂纹的焊接修复方法，属于机械技术领域。
背景技术
卷板机是将金属板材弯卷成弧形或圆筒形工件的通用设备，并可借助于辅助装置卷制一定范围内锥形工件其产品广泛用于造船、石油、化工、水电、机械制造等行业。四辊卷板机由于具有一次卷制成型和易于实现数控控制的优点,成为未来卷板机发展的趋势之一。机架是四辊卷板机中作为荷载的主要承受构件,受力情况复杂,是卷板机的主要部件之一。
现有的四辊卷板机的机架由于工作时会被超负荷使用，从而出现裂纹，会造成卷饼机的无法正常使用，影响生产的正常进行，如重新购买，则会产生资源浪费。如果想要修复，由于机架含碳量较高，可焊性较差,按常规的工艺施焊时,热影响区产生硬脆的马氏体组织,易于开裂，另外,焊接时相当数量母材会熔化进入焊缝,使其含碳量增高,容易产生焊接热裂纹。
发明内容
本发明的目的是克服技术的不足之处，提供一种四辊卷板机机架裂纹的焊接修复方法。
本发明的四辊卷板机机架裂纹的焊接修复方法，包括如下步骤：
1)打磨：将断裂处及周围的铁锈、油污清除干净，使用磨光机修磨机架的断裂处，再用砂纸打磨，露出金属光泽；
2)预热:用氧乙炔焰对焊件裂纹及周围进行预热,并用石棉布覆盖整个工件,当温度达到80-100度时进行焊接；
3)施焊：使用焊条在裂纹处进行表面堆焊，表面堆焊方法：每次焊接长度为10-15mm,每焊完一次用钢丝刷不断地清根和清理，然后用刨锤击打焊缝及焊缝两侧过渡区，等温度降至室温，再继续焊接下一处；
4)焊后热处理：每条焊缝热处理都采用电加热器进行加热，加热宽度：焊缝两边不少于500mm,加热温度600-650℃,保温3小时。用于消除残余应力。
5)焊后磨平焊缝，
所述的步骤3)中焊条在使用前经200-350摄氏度烘培1-1.5h后，保存在烘箱内，随用随取；
所述的步骤3)中将机架裂纹部分成对称的若干段进行焊接,焊接时采用对称分段跳焊。
优选地，
本发明的方法中，所述的步骤1)-3)重复若干次，如果焊接完成后发现裂纹、气孔和夹渣缺陷,继续重复步骤1)-3)，直到没有缺陷为止。
本发明具有如下技术效果：经修复后的机架可恢复正常使用，能基本上达到或接近原来的水平。效果良好，正常运行，大大节约了时间和成本。
具体实施方式
实施例1
本发明的四辊卷板机机架裂纹的焊接修复方法，包括如下步骤：
1)打磨：将断裂处及周围的铁锈、油污清除干净，使用磨光机修磨机架的断裂处，再用砂纸打磨，露出金属光泽；
2)预热:用氧乙炔焰对焊件裂纹及周围进行预热,并用石棉布覆盖整个工件,当温度达到80-100度时进行焊接；
3)施焊：使用焊条在裂纹处进行表面堆焊，表面堆焊方法：每次焊接长度为10-15mm,每焊完一次用钢丝刷不断地清根和清理，然后用刨锤击打焊缝及焊缝两侧过渡区，等温度降至室温，再继续焊接下一处；
4)焊后热处理：每条焊缝热处理都采用电加热器进行加热，加热宽度：焊缝两边不少于500mm,加热温度600-650℃,保温3小时。用于消除残余应力。
5)焊后磨平焊缝，
所述的步骤3)中焊条在使用前经200-350摄氏度烘培1-1.5h后，保存在烘箱内，随用随取；
所述的步骤3)中将机架裂纹部分成对称的若干段进行焊接,焊接时采用对称分段跳焊。
如果焊接完成后发现裂纹、气孔和夹渣缺陷,继续重复步骤1)-3)，直到没有缺陷为止。
结果：经修复后的机架可恢复正常使用，能基本上达到或接近原来的水平。

Claims (2)

  1. 四辊卷板机机架裂纹的焊接修复方法，其特征在于，包括如下步骤：
    1)打磨：将断裂处及周围的铁锈、油污清除干净，使用磨光机修磨机架的断裂处，再用砂纸打磨，露出金属光泽；
    2)预热:用氧乙炔焰对焊件裂纹及周围进行预热,并用石棉布覆盖整个工件,当温度达到80-100度时进行焊接；
    3)施焊：使用焊条在裂纹处进行表面堆焊，表面堆焊方法：每次焊接长度为10-15mm,每焊完一次用钢丝刷不断地清根和清理，然后用刨锤击打焊缝及焊缝两侧过渡区，等温度降至室温，再继续焊接下一处；
    4)焊后热处理：每条焊缝热处理都采用电加热器进行加热，加热宽度：焊缝两边不少于500mm,加热温度600-650℃,保温3小时；
    5)焊后磨平焊缝，
    所述的步骤3)中焊条在使用前经200-350摄氏度烘培1-1.5h后，保存在烘箱内，随用随取；
    所述的步骤3)中将机架裂纹部分成对称的若干段进行焊接,焊接时采用对称分段跳焊。
  2. 根据权利要求所述的四辊卷板机机架裂纹的焊接修复方法，其特征在于，所述的步骤1)-3)重复若干次。
PCT/CN2015/094429 2015-01-09 2015-11-12 四辊卷板机机架裂纹的焊接修复方法 WO2016110159A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510010151.X 2015-01-09
CN201510010151.XA CN104526253A (zh) 2015-01-09 2015-01-09 四辊卷板机机架裂纹的焊接修复方法

Publications (1)

Publication Number Publication Date
WO2016110159A1 true WO2016110159A1 (zh) 2016-07-14

Family

ID=52841981

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/094429 WO2016110159A1 (zh) 2015-01-09 2015-11-12 四辊卷板机机架裂纹的焊接修复方法

Country Status (2)

Country Link
CN (1) CN104526253A (zh)
WO (1) WO2016110159A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106493504A (zh) * 2017-01-04 2017-03-15 山东钢铁股份有限公司 烧结机的星轮齿板在线修复方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104526253A (zh) * 2015-01-09 2015-04-22 江苏龙胜机床制造有限公司 四辊卷板机机架裂纹的焊接修复方法
CN104924018B (zh) * 2015-07-06 2017-07-21 山东钢铁股份有限公司 一种大型电机转子大断面裂纹现场修复方法
CN107234355B (zh) * 2017-07-21 2019-04-26 白银有色集团股份有限公司 箱形构件分离式断裂自固定焊接修复法
CN109530886A (zh) * 2019-01-02 2019-03-29 马钢集团矿业有限公司 一种重型电动挖掘机双梁箱形铲杆断裂焊接修复工艺
CN112958881A (zh) * 2021-02-05 2021-06-15 安徽马钢设备检修有限公司 一种悬挂式齿轮减速机箱体开裂手工焊接装置及焊接工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102152058A (zh) * 2011-05-11 2011-08-17 天津冶金集团重型机械制造有限公司 大型冷轧支承辊堆焊修复工艺
CN102441760A (zh) * 2011-11-07 2012-05-09 山西鼎荣冷弯型钢有限公司 冷弯轧辊焊接修复方法
US8221825B2 (en) * 2009-03-30 2012-07-17 Alstom Technology Ltd. Comprehensive method for local application and local repair of thermal barrier coatings
US20130323066A1 (en) * 2012-05-31 2013-12-05 Monika D. Kinstler Maskant for fluoride ion cleaning
CN103481012A (zh) * 2013-09-22 2014-01-01 湖州市银鑫轧辊有限公司 一种轧辊焊接修复方法
CN104526253A (zh) * 2015-01-09 2015-04-22 江苏龙胜机床制造有限公司 四辊卷板机机架裂纹的焊接修复方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719980A1 (de) * 1987-06-15 1988-12-29 Meuwsen & Brockhausen Reparatur von hydraulikzylindern fuer ausbauschilde
FR2871399B1 (fr) * 2004-06-15 2006-09-22 Snecma Moteurs Sa Procede de reparation d'un element d'aube
CN101357429B (zh) * 2007-08-03 2010-05-19 上海船厂船舶有限公司 断裂的铸铁件的焊补方法
CN102632321A (zh) * 2012-04-23 2012-08-15 湖南华菱湘潭钢铁有限公司 轧机轧辊端接头裂纹焊接修复工艺

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8221825B2 (en) * 2009-03-30 2012-07-17 Alstom Technology Ltd. Comprehensive method for local application and local repair of thermal barrier coatings
CN102152058A (zh) * 2011-05-11 2011-08-17 天津冶金集团重型机械制造有限公司 大型冷轧支承辊堆焊修复工艺
CN102441760A (zh) * 2011-11-07 2012-05-09 山西鼎荣冷弯型钢有限公司 冷弯轧辊焊接修复方法
US20130323066A1 (en) * 2012-05-31 2013-12-05 Monika D. Kinstler Maskant for fluoride ion cleaning
CN103481012A (zh) * 2013-09-22 2014-01-01 湖州市银鑫轧辊有限公司 一种轧辊焊接修复方法
CN104526253A (zh) * 2015-01-09 2015-04-22 江苏龙胜机床制造有限公司 四辊卷板机机架裂纹的焊接修复方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106493504A (zh) * 2017-01-04 2017-03-15 山东钢铁股份有限公司 烧结机的星轮齿板在线修复方法

Also Published As

Publication number Publication date
CN104526253A (zh) 2015-04-22

Similar Documents

Publication Publication Date Title
WO2016110159A1 (zh) 四辊卷板机机架裂纹的焊接修复方法
CN102441760B (zh) 冷弯轧辊焊接修复方法
CN104816076B (zh) 一种连续管的管管对接焊工艺方法
CN105436665B (zh) 大型热轧支承辊Cr4的堆焊再造层及修复轧辊的方法
CN103084703B (zh) 一种大型内空铸钢件挖补堆焊再制造方法
CN109014518B (zh) 一种火车车轮模座焊接装置及修复工艺
CN103481010B (zh) 一种全自动在线冷焊修复辊压机工艺
CN104858555A (zh) 压力管道焊接工艺
CN103481012A (zh) 一种轧辊焊接修复方法
CN103612000A (zh) 一种冷弯轧辊焊接修复方法
CN101003104A (zh) 一种型材轧辊堆焊修复工艺
CN102886590A (zh) 采用手工电弧焊浸水补焊修复零件缺陷的方法
CN105665898B (zh) 一种珠光体耐热钢复合板埋弧自动焊焊接方法
CN105414878B (zh) 一种高耐热合金钢铸件缺陷的返修方法
CN105750813A (zh) 一种热轧支撑辊堆焊修复工艺
CN104923928B (zh) 一种用于起重机臂架的q690d钢管纵缝焊接方法
CN109317789B (zh) 换热器堆焊管板与t91换热管的焊接方法
CN104002023A (zh) 一种针对异种材质厚板的焊接工艺
CN102398105A (zh) X80钢级埋弧自动焊管件整体调质处理的工艺方法
CN104827164A (zh) 大面积大厚度tu2铜/钢爆炸复合材料及缺陷的修复方法
CN102717225A (zh) 轧辊非工作面损伤修复方法
CN112935602A (zh) 一种用于大尺寸超厚板的埋弧焊接方法
CN102794538A (zh) 一种提高低碳马氏体不锈钢焊缝低温冲击韧性的焊接方法
CN110773839A (zh) 一种避免镍基合金弯管出现补焊裂纹的焊接工艺方法
CN101934434B (zh) 铸铁热补焊工艺及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15876659

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15876659

Country of ref document: EP

Kind code of ref document: A1