CN102941521B - Method for polishing build-up welding layer on damaged surface of large shaft of power station - Google Patents
Method for polishing build-up welding layer on damaged surface of large shaft of power station Download PDFInfo
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- CN102941521B CN102941521B CN201210312737.8A CN201210312737A CN102941521B CN 102941521 B CN102941521 B CN 102941521B CN 201210312737 A CN201210312737 A CN 201210312737A CN 102941521 B CN102941521 B CN 102941521B
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- overlay cladding
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Abstract
The invention provides a method for polishing a build-up welding layer on a damaged surface of a large shaft of a power station. The method comprises the following steps: metal protective layers are arranged on two sides of the build-up welding layer, wherein the thickness of each of the metal protective layers on the two sides is smaller than that of the build-up welding layer; the build-up welding layer is polished by a crawler type abrasive belt polisher until the thicknesses of the metal protective layers are not higher than 0.03 millimeter; and a drum-type polisher is adopted for polishing. In the embodiment of the invention, layering polishing is adopted, and the two sides of the build-up welding layer to be polished are protected by copper sheets or other metalloid material before polishing; and then a crawler type electric abrasive belt polisher and the drum-type polisher are used for polishing the build-up welding layer according to different requirements. The embodiment of the invention solves the problem that the repairing polishing precision of the build-up welding layer of the large shaft of the power station is mainly satisfied by manual polishing of polishing technicians. The embodiment of the invention has the advantage that the large shaft can be repaired on the spot, so that the maintenance time of power station enterprises can be reduced.
Description
Technical field
The present invention relates to welding technology field, relate to a kind of power station macrotype axes series damaged surfaces overlay cladding polishing process.
Background technology
During existing power station macrotype axes series damaged surfaces, the renovation technique mainly and superficial punctate fusion joining process complete based on machinery knot of employing.In the axle journal renovation technique of the turbine rotor of power plant's rotating machinery that the reparation repair welding of the large-scale journal wear in power station is commonly used at present, the normal method used is as turning method, hot spray process, brush plating method, paster differential of the arc welding method, laser cladding, electric spark deposition welding method etc.
In the reparation of axle class, serve certain effect in above-mentioned technique, but all need to need after repair could meet macro-axis surface finish requirements through polishing.The method of existing polishing is that manual file adds electric tool polishing substantially, causes polishing precision to depend on polishing technician technical merit completely like this.
Summary of the invention
For the defect existed in the macrotype axes series damaged surfaces technology of existing power station and problem, the object of the embodiment of the present invention is to provide one more rational power station macrotype axes series damaged surfaces overlay cladding polishing process.
In order to achieve the above object, the embodiment of the present invention provides following technical scheme: a kind of power station macrotype axes series damaged surfaces overlay cladding polishing process, comprising:
Step 1, arrange coat of metal in overlay cladding both sides, the thickness of the coat of metal of described both sides is lower than the thickness of described overlay cladding;
Step 2, employing crawler type belt grinder are polished to overlay cladding, until the thickness of described coat of metal is not higher than 0.03 millimeter;
Step 3, employing drum-type polishing machine carry out polishing.
Preferred as technique scheme, described method also comprises:
Step 4, measure to guarantee error not higher than 0.03 millimeter to overlay cladding thickness.
Preferred as technique scheme, the thickness of described coat of metal is 0.02 to 0.6 millimeter.
Preferred as technique scheme, the thickness of described coat of metal is 0.5 millimeter.
Preferred as technique scheme, described coat of metal is copper sheet.
Preferred as technique scheme, described step 2 is specially:
The crawler type belt grinder that step 21, employing are provided with coarse grain abrasive band is polished to overlay cladding, until the height of overlay cladding is identical with coat of metal;
The crawler type belt grinder that step 22, employing are provided with particulate abrasive band is polished to overlay cladding and coat of metal;
Step 23, continuation adopt the crawler type belt grinder being provided with coarse grain abrasive band to polish to overlay cladding, and after overlay cladding thickness often reduces by 0.1 millimeter, judge whether the thickness of overlay cladding thickness is less than 0.01 millimeter, if yes then enter step 3, if otherwise return step 22.
The embodiment of the present invention have employed layering polishing process, adopts copper sheet or other metalloid material to needing protecting layer both sides of polishing before polishing; Then overlay cladding is polished by different needs with track-mounted electric belt grinder and drum-type polishing machine.The coat of metal of the embodiment of the present invention serves the effect of the glacing flatness controlling polishing size and ensure polishing, solves power station macrotype axes series overlay cladding reparation polishing precision completely by a difficult problem for the manual polishing of grinding technology personnel.The embodiment of the present invention can be repaired macro-axis at the scene, decreases the power station enterprise repair time, realizes quality and efficiency doulbe-sides' victory.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing of the present invention, be clearly and completely described technical scheme of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The inventive point of the embodiment of the present invention is layering polishing process; namely adopt copper sheet or other metalloid material to protect needs polishing layer both sides before polishing, then by different needs, overlay cladding is polished with track-mounted electric belt grinder and drum-type polishing machine.Wherein protective layer serves the effect of the glacing flatness controlling polishing size and ensure polishing; power station macrotype axes series overlay cladding reparation polishing precision can be solved so completely by a difficult problem for the manual polishing of grinding technology personnel; this technique can be repaired macro-axis at the scene; decrease the power station enterprise repair time, realize quality and efficiency doulbe-sides' victory
The method of the embodiment of the present invention as shown in Figure 1, comprising:
Step 1, arrange coat of metal in overlay cladding both sides, wherein this coat of metal can be copper sheet, and the thickness of the coat of metal of described both sides is lower than the thickness of described overlay cladding, and the thickness of this coat of metal can be 0.02 to 0.6 millimeter;
Step 2, employing crawler type belt grinder are polished to overlay cladding, until the thickness of described coat of metal is not higher than 0.03 millimeter;
Step 3, employing drum-type polishing machine carry out polishing.
Step 4, measure to guarantee error not higher than 0.03 millimeter (± ≯ 0.03) to overlay cladding thickness.
Wherein, described step 2 is specially:
The crawler type belt grinder that step 21, employing are provided with coarse grain abrasive band is polished to overlay cladding, until the height of overlay cladding is identical with coat of metal;
The crawler type belt grinder that step 22, employing are provided with particulate abrasive band is polished to overlay cladding and coat of metal;
Step 23, continuation adopt the crawler type belt grinder being provided with coarse grain abrasive band to polish to overlay cladding, and after overlay cladding thickness often reduces by 0.1 millimeter, judge whether the thickness of overlay cladding thickness is less than 0.03 millimeter, if yes then enter step 3, if otherwise return step 22.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (4)
1. a power station macrotype axes series damaged surfaces overlay cladding polishing process, is characterized in that, comprising:
Step 1, arrange coat of metal in overlay cladding both sides, the thickness of the coat of metal of described both sides is lower than the thickness of described overlay cladding;
The crawler type belt grinder that step 2, employing are provided with coarse grain abrasive band is polished to overlay cladding, until the height of overlay cladding is identical with coat of metal;
The crawler type belt grinder that step 3, employing are provided with particulate abrasive band is polished to overlay cladding and coat of metal;
Step 4, continuation adopt the crawler type belt grinder being provided with coarse grain abrasive band to polish to overlay cladding, and after overlay cladding thickness often reduces by 0.1 millimeter, judge whether the thickness of overlay cladding is less than 0.03 millimeter, if yes then enter step 5, if otherwise return step 3;
Step 5, employing drum-type polishing machine carry out polishing;
Step 6, measure to guarantee error not higher than 0.03 millimeter to overlay cladding thickness.
2. power station according to claim 1 macrotype axes series damaged surfaces overlay cladding polishing process, it is characterized in that, the thickness of described coat of metal is 0.02 to 0.6 millimeter.
3. power station according to claim 2 macrotype axes series damaged surfaces overlay cladding polishing process, it is characterized in that, the thickness of described coat of metal is 0.5 millimeter.
4. power station according to claim 1 macrotype axes series damaged surfaces overlay cladding polishing process, it is characterized in that, described coat of metal is copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210312737.8A CN102941521B (en) | 2012-08-29 | 2012-08-29 | Method for polishing build-up welding layer on damaged surface of large shaft of power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210312737.8A CN102941521B (en) | 2012-08-29 | 2012-08-29 | Method for polishing build-up welding layer on damaged surface of large shaft of power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102941521A CN102941521A (en) | 2013-02-27 |
| CN102941521B true CN102941521B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210312737.8A Expired - Fee Related CN102941521B (en) | 2012-08-29 | 2012-08-29 | Method for polishing build-up welding layer on damaged surface of large shaft of power station |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5692948A (en) * | 1992-09-30 | 1997-12-02 | Western Atlas | Grinding machine utilizing multiple, parallel, abrasive belts for simultaneously grinding surfaces on a workpiece |
| CN101618494A (en) * | 2009-07-21 | 2010-01-06 | 神龙汽车有限公司 | Method for restoring surface defects of casting machine after machining |
| CN101700594A (en) * | 2009-11-26 | 2010-05-05 | 兰州瑞迈克电力科技有限公司 | On-site unstressed surfacing repairing process of large rotor journal sealing bush abrasion part |
| CN101758438A (en) * | 2010-01-28 | 2010-06-30 | 朱健 | Minitype hand-push type belt sander |
| CN102091719A (en) * | 2010-12-07 | 2011-06-15 | 宝钢集团常州轧辊制造公司 | Limiting mandrel for mandrel pipe mill and manufacturing method thereof |
-
2012
- 2012-08-29 CN CN201210312737.8A patent/CN102941521B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5692948A (en) * | 1992-09-30 | 1997-12-02 | Western Atlas | Grinding machine utilizing multiple, parallel, abrasive belts for simultaneously grinding surfaces on a workpiece |
| CN101618494A (en) * | 2009-07-21 | 2010-01-06 | 神龙汽车有限公司 | Method for restoring surface defects of casting machine after machining |
| CN101700594A (en) * | 2009-11-26 | 2010-05-05 | 兰州瑞迈克电力科技有限公司 | On-site unstressed surfacing repairing process of large rotor journal sealing bush abrasion part |
| CN101758438A (en) * | 2010-01-28 | 2010-06-30 | 朱健 | Minitype hand-push type belt sander |
| CN102091719A (en) * | 2010-12-07 | 2011-06-15 | 宝钢集团常州轧辊制造公司 | Limiting mandrel for mandrel pipe mill and manufacturing method thereof |
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| CN102941521A (en) | 2013-02-27 |
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