CN103447702A - Method for overcoming welding deformation of end covers of large-size mills - Google Patents
Method for overcoming welding deformation of end covers of large-size mills Download PDFInfo
- Publication number
- CN103447702A CN103447702A CN 201210175399 CN201210175399A CN103447702A CN 103447702 A CN103447702 A CN 103447702A CN 201210175399 CN201210175399 CN 201210175399 CN 201210175399 A CN201210175399 A CN 201210175399A CN 103447702 A CN103447702 A CN 103447702A
- Authority
- CN
- China
- Prior art keywords
- welding
- welding deformation
- end covers
- end cap
- change
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Images
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a method for overcoming welding deformation of end covers of large-size mills. The method includes changing a welding form of a welding groove to change the conventional welding process, and welding the end covers with adjacent small shell rings into small pieces to improve welding quality of the end covers of the large-size mills. With the method, repair rate of products is reduced greatly, product quality is improved steadily and benefit of companies is increased.
Description
Technical field
The present invention relates to a kind of welding method, particularly a kind of method for overcoming large-sized grinder end cap welding deformation.
Technical background
The grinding machine series products is a lot of now, and volume is increasing, and manufacture difficulty is increasing, and finds that in process of production the grinder shell cover plate produces evagination or indent phenomenon in welding process.Because when welding, end casing thickness δ >=100mm, cylinder board thickness δ ≈ 50mm, bevel for welding is larger, and the filling metal is many, when welding, obtain metal great stress of thick generation in the technology cooling procedure in bath, stress can not discharge in time, will rush at all directions, when the stress in weak area, certain surpasses the yield strength of steel plate, the distortion of evagination indent will occur.And the back chipping mode in former welding procedure (former groove is little, during the groove 2/3 of the welding outside, uses carbon arc air gouging at inboard back chipping) back chipping quality is very low, and repair rate is very high.If solve and will cause dimension overproof not in time, the attenuation of processing rear-end plate thickness, reduce grinding machine intensity, affects the grinding machine quality, reduces the service life of grinding machine.And the evagination indent phenomenon produced in welding process is corrected difficulty, becomes the difficult problem in production.
Summary of the invention
The present invention is directed in welding process the yielding situation of holding in grinder shell cover plate welding process, change the bevel for welding Type of Welding, change welding procedure in the past, and require end casing first with adjacent little shell ring, to be welded into smallclothes, check deformation, while finding overproof (the deflection) >=3mm of distortion, adopt flame to correct or the correction of 800T hydraulic press.Utilize the grinding machine of this method welding, do not need to correct, and welding quality is high, can significantly reduce costs and repair rate.
The invention has the beneficial effects as follows the quality that improves the grinder shell cover welding, greatly reduce the repair rate of product, product quality promotes steadily, improves the benefit of enterprise.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further detailed.
Fig. 1 is former groove type.
Fig. 2 is the groove type after changing.
The specific embodiment
1. change the groove shape, change original bevel angle into 50 ° as Fig. 1 Fig. 2 by original 60 °.
2. change welding procedure.
(1). suitable preheating during welding, preheat temperature is 50 ℃.
(2)
.symmetrical welding, first weld weld joint on inner side, and outside back chipping welds outer side weld.Because first weld weld joint on inner side, end casing is stressed on the indent direction, and indent trend is arranged.Outside back chipping, after welding outer side weld, can produce the power of the evagination of cancelling out each other with indent power, distortion that can the control end cover plate.
3. end casing first is welded into to widget with adjacent keg joint, rear inspection deformation, if distortion is greater than 3mm, available 800T hydraulic press is corrected or flame straightening.
Utilize 21 of the grinding machines of this method welding, do not need to use the 800T hydraulic press to correct and flame straightening, due to the raising of welding quality, cost and repair rate reduce greatly, and product quality has obtained further raising.
Claims (4)
1. one kind for the method that overcomes large-sized grinder end cap welding deformation, and by changing the bevel for welding Type of Welding, the welding procedure changed in the past realizes the control to welding deformation.
2. a kind of method for overcoming large-sized grinder end cap welding deformation according to claim 1 is characterized in that: change the groove shape, change original bevel angle into 50 ° as Fig. 1 Fig. 2 by original 60 °.
3. a kind of method for overcoming large-sized grinder end cap welding deformation according to claim 1 is characterized in that: change welding procedure, symmetrical welding, first weld weld joint on inner side, and outside back chipping welds outer side weld.
4. a kind of method for overcoming large-sized grinder end cap welding deformation according to claim 1, it is characterized in that: end casing first is welded into to widget with adjacent keg joint, rear inspection deformation, if distortion is greater than 3mm, available 800T hydraulic press is corrected or flame straightening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210175399 CN103447702A (en) | 2012-05-31 | 2012-05-31 | Method for overcoming welding deformation of end covers of large-size mills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210175399 CN103447702A (en) | 2012-05-31 | 2012-05-31 | Method for overcoming welding deformation of end covers of large-size mills |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103447702A true CN103447702A (en) | 2013-12-18 |
Family
ID=49730749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210175399 Withdrawn CN103447702A (en) | 2012-05-31 | 2012-05-31 | Method for overcoming welding deformation of end covers of large-size mills |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103447702A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113102911A (en) * | 2021-04-14 | 2021-07-13 | 营口诚源机械设备有限公司 | Low-deformation vertical welding structure and process |
| CN114273759A (en) * | 2021-12-30 | 2022-04-05 | 东方电气（武汉）核设备有限公司 | Welding method of reactor core shroud assembly |
-
2012
- 2012-05-31 CN CN 201210175399 patent/CN103447702A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113102911A (en) * | 2021-04-14 | 2021-07-13 | 营口诚源机械设备有限公司 | Low-deformation vertical welding structure and process |
| CN113102911B (en) * | 2021-04-14 | 2021-10-29 | 营口诚源机械设备有限公司 | Low-deformation vertical welding structure and process |
| WO2022217777A1 (en) * | 2021-04-14 | 2022-10-20 | 营口诚源机械设备有限公司 | Low deformation vertical welding structure and process |
| CN114273759A (en) * | 2021-12-30 | 2022-04-05 | 东方电气（武汉）核设备有限公司 | Welding method of reactor core shroud assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103008898B (en) | The welding method of tack-weld method, welding method and box beam | |
| CN106583905A (en) | Gas turbine guider casing welding tool and welding method | |
| CN112935479A (en) | Welding device and repairing process for large wheel fixing table base fracture | |
| CN101497145A (en) | Repairing welding method for crack of Cr12MoV steel mold | |
| CN110091134A (en) | A kind of stainless steel end socket rushes spin forming process | |
| CN103447702A (en) | Method for overcoming welding deformation of end covers of large-size mills | |
| CN110899920A (en) | Girth welding method for low-alloy steel low-temperature pressure container tank body | |
| CN102380723A (en) | Circular seam welder for automobile wheels | |
| CN101761541A (en) | Manufacturing process for main shaft of large water turbine | |
| CN103695835A (en) | Hard alloy filler repairing technology | |
| CN104842082B (en) | Welding chain link welding device | |
| CN102528218B (en) | Method for preventing deformation of large-size thin-wall annular casting during welding process | |
| CN107964573B (en) | A kind of medium blast furnace furnace shell Replacement procedure | |
| CN103658931A (en) | Double-layer bead welding method for axle swage block | |
| CN104607553A (en) | Surface welding method for automobile cold-punching die cutting edge | |
| CN104439665A (en) | Ultrathin cold air flow guide pipe precise welding method | |
| CN112621107A (en) | Flash welding method for straight seam of high-strength steel wheel rim | |
| CN105364430A (en) | Laser welding method capable of realizing synchronous rolling of edge joints of sheets | |
| CN101850489B (en) | Process method for welding and repairing sintering trolley | |
| CN111716078A (en) | Plasma welding method for straight seam of thin-wall cylindrical steel shell | |
| CN103909353A (en) | Welding process of semi-finished electrical heated tube and flange | |
| CN103447710A (en) | Method for solving problem of welding sinking of mill manhole reinforcing plate | |
| CN103934625B (en) | The piston rod mosaic technology of a kind of jack and column | |
| CN113245672A (en) | Argon arc welding method for ultrahigh-strength steel | |
| CN108942114B (en) | Production method of oil cylinder of tensioning device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20131218 |