CN1397401A - Arc preheating method for automatic butt welding of T91 pipes - Google Patents
Arc preheating method for automatic butt welding of T91 pipes Download PDFInfo
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- CN1397401A CN1397401A CN 02138938 CN02138938A CN1397401A CN 1397401 A CN1397401 A CN 1397401A CN 02138938 CN02138938 CN 02138938 CN 02138938 A CN02138938 A CN 02138938A CN 1397401 A CN1397401 A CN 1397401A
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- pipe
- welding
- welding machine
- automatic welder
- electric arc
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
An arc preheating method for automatic welding T91 tubes used in boiler features that the electric arc is generated between the W electrode of welding gun and tube to preheat the tube while the tube is rotating. Its advantages are controllable temp, high temp uniformity and high weld quality and productivity.
Description
The present invention relates to a kind of pipe butt joint weldering electric arc pre-heating mean automatically, being specially adapted in the boiler manufacturing has the pipe of weld preheating requirement to materials such as T91, adopts weldering welding automatically.
In the boiler manufacturing, there is a large amount of pipes need adopt automatic weldering welding, because in national standard and the welding procedure specification (WPS), need 150～250 ℃ of preheatings before the pipe regulation weldering to materials such as T91, no matter automatic welder(welding machine) homemade or import does not have the weld preheating function at present, need with oxygen, acetylene torch preheating, its deficiency is the necessary aerobic of operation site, acetylene gas bottle or steam line, the heating of employing naked light, automatic welding equipment and environment are brought potential safety hazard, and heating-up temperature is inhomogeneous, and temperature is wayward, the more numerous rope of operation.Adopt the specification requirement of the preceding preheating of weldering butt welding automatically relatively harsher:
1, suitable heating source is arranged, existing equipment is not produced any dried scratching;
2, heating-up temperature has repeatability, repeatability preferably;
3, heating-up temperature can be with environment temperature, pipe specification and to the free adjustment that requires of preheat temperature;
The chemical reaction that can not damage the pipe groove face and produce other when 4, heating;
5, on the garden Zhou Fangxiang of 360 ° on pipe, more consistent temperature field is arranged.
6, heating can only be implemented after the pipe assembling and positioning.
The purpose of this invention is to provide a kind of pipe butt joint weldering electric arc pre-heating mean automatically, when utilizing this method to be welded with the pipe of weld preheating requirement, preheating and welding follow procedure are finished continuously, need not to increase any additional heating device.
Adopt the present invention, a kind of automatic welder(welding machine) that has the electric arc preheat function can be provided, or existing automatic welder(welding machine) is transformed into the automatic welder(welding machine) with electric arc preheat function.
Task of the present invention is to realize by following way: the basic function of utilizing various pipes homemade or import to dock automatic welder(welding machine), make between welding gun tungsten electrode and the pipe and produce electric arc, utilize torch swinging, enlarge heated perimeter, utilize automatic welder(welding machine) power chuck clamping pipe to rotate the whole circle of pipe is evenly heated around axis.The size of electric arc, the amplitude of fluctuation of electric arc, the rotary speed of pipe, duration all can be adjusted and be set as required, specification according to pipe, environment temperature, and, change setting value and all can realize the control of preheat temperature, in case automatically switch to welding procedure after finishing preheating procedure to the requirement difference of preheat temperature.Adopt this method, make the pipe preheat temperature even, welding quality stable, the production efficiency height, production cost is low, is beneficial to production in enormous quantities.
Provide embodiments of the invention below in conjunction with accompanying drawing, be used for further specifying the present invention, and do not mean that this invention just is confined to following:
In the drawings: 1---the automatic welder(welding machine) power chuck
2---pipe
3---welding gun tungsten electrode
4---electric arc
5---the source of welding current
6---protective gas
Program behavior realizes through simple the setting that by the PLC control system of automatic welder(welding machine) self by increase a selector switch on control panel, automatic welder(welding machine) is divided into general welding, pre-thermal weld second gear switches as required.Said method has added on the automatic gas metal-arc welder at the automatic tungsten anode argon arc welding of the homemade heated filament tungsten electrode automatic argon arc welder of our factory and Japanese import and has used, and effect is satisfactory.
Claims (2)
1, a kind of pipe butt joint weldering electric arc pre-heating mean is not automatically increasing under any additional heating device situation, repacks the pipe butt joint automatic welder(welding machine) of homemade or import into have preheat function automatic welder(welding machine), the invention is characterized in also to comprise the following steps:
A, utilized the electric arc heated principle, produced electric arc between welding gun tungsten electrode and the pipe and pipe is advanced as thermal source
The row heating, this moment, arc zone was connected protective gas.
B, utilize the torch swinging function, enlarge heated perimeter.
C, utilize automatic welder(welding machine) power chuck clamping pipe rotation to make the whole circle of pipe homogeneous heating.
D, by adjusting the size of electric arc, the rotary speed of pipe, the duration of heat, control preheat temperature.
E, from being preheating to welding, by the PLC control system of automatic welder(welding machine) self, realize through simple the setting
Automatically control and conversion.
F, select beginning, automatic welder(welding machine) is divided into general welding and pre-thermal weld second gear by increasing by one, according to
Need to switch.
2, by the described method of claim 1, it is characterized in that:
Be equally applicable to pipe is maintained static, rotate in welding gun tungsten electrode garden outside pipe, and the automatic welder(welding machine) that welding gun has the swing function repacks the automatic welder(welding machine) with electric arc preheat function into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138938 CN1233496C (en) | 2002-08-16 | 2002-08-16 | Arc preheating method for automatic butt welding of T91 pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138938 CN1233496C (en) | 2002-08-16 | 2002-08-16 | Arc preheating method for automatic butt welding of T91 pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1397401A true CN1397401A (en) | 2003-02-19 |
| CN1233496C CN1233496C (en) | 2005-12-28 |
Family
ID=4749805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02138938 Expired - Fee Related CN1233496C (en) | 2002-08-16 | 2002-08-16 | Arc preheating method for automatic butt welding of T91 pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1233496C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464923C (en) * | 2006-06-09 | 2009-03-04 | 浙江省火电建设公司 | P92 steel welding process |
| CN101433989B (en) * | 2008-12-18 | 2011-03-09 | 天津钢管集团股份有限公司 | Method for welding cold-expansion tube production line draw rod |
| CN102166687A (en) * | 2011-01-24 | 2011-08-31 | 河南理工大学 | Preparation method of heat-resisting steel tube instant liquid phase diffusion connection interlayer alloy |
| CN102398132A (en) * | 2010-09-10 | 2012-04-04 | 中国石油化工股份有限公司 | Device for horizontally aligning expansion corrugated pipes, and pipe aligning welding method |
| CN107695554A (en) * | 2017-11-18 | 2018-02-16 | 徐州华显凯星信息科技有限公司 | A kind of construction metal pipe material welder |
-
2002
- 2002-08-16 CN CN 02138938 patent/CN1233496C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464923C (en) * | 2006-06-09 | 2009-03-04 | 浙江省火电建设公司 | P92 steel welding process |
| CN101433989B (en) * | 2008-12-18 | 2011-03-09 | 天津钢管集团股份有限公司 | Method for welding cold-expansion tube production line draw rod |
| CN102398132A (en) * | 2010-09-10 | 2012-04-04 | 中国石油化工股份有限公司 | Device for horizontally aligning expansion corrugated pipes, and pipe aligning welding method |
| CN102166687A (en) * | 2011-01-24 | 2011-08-31 | 河南理工大学 | Preparation method of heat-resisting steel tube instant liquid phase diffusion connection interlayer alloy |
| CN102166687B (en) * | 2011-01-24 | 2012-08-01 | 河南理工大学 | Preparation method of heat-resisting steel tube instant liquid phase diffusion connection interlayer alloy |
| CN107695554A (en) * | 2017-11-18 | 2018-02-16 | 徐州华显凯星信息科技有限公司 | A kind of construction metal pipe material welder |
| CN107695554B (en) * | 2017-11-18 | 2020-02-18 | 上海中巽科技股份有限公司 | Building construction metal tubular product welding set |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1233496C (en) | 2005-12-28 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051228 |