CN102825433A - Integral molding manufacturing process method of steam turbine generator copper shield - Google Patents
Integral molding manufacturing process method of steam turbine generator copper shield Download PDFInfo
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- CN102825433A CN102825433A CN2012103470230A CN201210347023A CN102825433A CN 102825433 A CN102825433 A CN 102825433A CN 2012103470230 A CN2012103470230 A CN 2012103470230A CN 201210347023 A CN201210347023 A CN 201210347023A CN 102825433 A CN102825433 A CN 102825433A
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Abstract
The invention discloses an integral molding manufacturing process method of a steam turbine generator copper shield. By the method, the tolerance and the quality of the copper shield are ensured, the cost is saved and the production cycle is shortened. A copper shield structure with three arc transitions is manufactured by an integral molding method by fully using the excellent ductility of copper and molding for two times. By the method, the manufacturing technology of the steam turbine generator copper shield is innovated radically and is an essential change of the manufacturing method. By the process method, the welding of a copper material is avoided, the hurt to an environment and the body of a welding worker during copper welding is reduced, and the production cycle of assembling, checking, welding and correcting a single component is reduced. By a special pressing die, the risk of over size is reduced, and the size stability of the steam turbine generator copper shield is improved. The manufacturing cycle is saved, higher value lies in that the manufacturing cost is greatly reduced, and the size stability of a workpiece is improved.
Description
Technical field
The present invention relates to a kind of steam turbine generator copper shield global formation method of manufacturing technology.
Background technology
Copper shield was a Welding Structure in the past, was divided into upper and lower two parts, and upper and lower two parts respectively are divided into two blankings, was welded into full circle after the moulding separately, and passing through upper and lower two parts therebetween again, the girth joint assembly welding arrives together.The independent moulding difficulty of this method is higher, and appearance of weld is of poor quality, and need the welding of copper be had ripe experience, and the production cycle is long.
Summary of the invention
The present invention provides a kind of tolerance and quality that guarantees copper shield, saves cost and production cycle
A kind of steam turbine generator copper shield global formation method of manufacturing technology.Technical scheme of the present invention is:
A. get the raw materials ready according to the drawing blank size: get the raw materials ready according to the figure paper size according to drawing blank size buying copper coin or employing CUT, hydraulic press flattens after the blanking;
B. prepare before the annealing: copper coin is lain against special-purpose annealing supporting tool upper surface, and upper surface is apart from furnace bottom 340mm;
C. soft annealing: according to special-purpose annealing curve copper coin is carried out soft annealing, temperature retention time 2 hours 30 minutes;
D. turning: reserve surplus according to the figure paper size, processing copper coin cylindrical, burr is removed in polishing;
E. prepare before the die mould for the first time: the oxide skin on the cleaning copper coin, brush with wire brush in case of necessity, whether inspection each parts of pressure-type tool and surface thereof be intact, handles in case of necessity;
F. the pressure testing of die mould for the first time: pressure-type tool being incorporated on the hydraulic press, is accomplished a pressure testing, and the inspection mould is installed and the operating process stable case;
G. die mould for the first time: copper coin placed on the counterdie plane align, dress presses thick stick to screw, and the lifting trim ring penetrates that taper key is urgent not to have the gap between trim ring and backing plate, is forced into 1500T gradually;
H. car centre bore: for the first time behind the die mould car centre bore to preliminary dimension;
I. prepare before the die mould for the second time: assemble the patrix that closes the secondary press mould and forcing press, patrix with the counterdie correction concentric after, fix again and close counterdie;
J. die mould for the second time: the copper shield after the one-shot forming is hung onto in the post forming mould; To adorn and press thick stick to screw, the lifting trim ring, the dress taper key is urgent; Be forced into 1500T during die mould gradually, above-mentioned technology is steam turbine generator copper shield global formation method of manufacturing technology.
The steam turbine generator copper shield is formed by 4 sections, through 3 arc transition.Counterdie and patrix are the critical pieces of accomplishing the die mould task, and the copper coin body is fixed on the counterdie by trim ring, backing plate, pressure thick stick, taper key.Patrix is a demountable structure, can accomplish moulding for the first time and moulding for the second time respectively.This method has made full use of the copper good ductility, and twice moulding before and after utilizing produces the copper shield structure with 3 arc transition with the method for global formation.
The present invention is an example with certain 300MW steam turbine generator copper shield, and this copper shield has the fillet moulding of 3 places.According to way in the past, need respectively four copper coins to be carried out moulding, welding and assembly welding.This method is waste material not only, has more taken a large amount of production cycles, and the pernicious gas that the copper product welding produces also pollutes environment and human body.
The present invention has fundamentally reformed the manufacturing technology of steam turbine generator copper shield, is in essence change on the manufacturing approach.Use process of the present invention, avoided the welding of copper product, reduced when brazing connects, saved the production cycle of single-piece assembling, inspection, welding, school type the infringement of environment and welder's health.Utilize special-purpose pressing mold, reduced the risk of dimension overproof, improved the dimensional stability of steam turbine generator copper shield.
The present invention replaces the method for welding after original single-piece moulding with the process of whole post forming, has not only practiced thrift the manufacturing cycle, and bigger value is significantly to have reduced manufacturing cost, has improved the dimensional stability of workpiece.
Description of drawings
Fig. 1 is a steam turbine generator copper shield structural representation.
Fig. 2 is the whole secondary forming process method of a steam turbine generator copper shield schematic diagram.
The specific embodiment
The present invention is tolerance and the quality that guarantees copper shield, saves cost and a kind of steam turbine generator copper shield global formation method of manufacturing technology of production cycle.Technical scheme of the present invention is:
A. get the raw materials ready according to the drawing blank size: get the raw materials ready according to the figure paper size according to drawing blank size buying copper coin or employing CUT, hydraulic press flattens after the blanking;
B. prepare before the annealing: copper coin is lain against special-purpose annealing supporting tool upper surface, and upper surface is apart from furnace bottom 340mm;
C. soft annealing: according to special-purpose annealing curve copper coin is carried out soft annealing, temperature retention time 2 hours 30 minutes;
D. turning: reserve surplus according to the figure paper size, processing copper coin cylindrical, burr is removed in polishing;
E. prepare before the die mould for the first time: the oxide skin on the cleaning copper coin, brush with wire brush in case of necessity, whether inspection each parts of pressure-type tool and surface thereof be intact, handles in case of necessity;
F. the pressure testing of die mould for the first time: pressure-type tool being incorporated on the hydraulic press, is accomplished a pressure testing, and the inspection mould is installed and the operating process stable case;
G. die mould for the first time: copper coin placed on counterdie 7 planes align, dress presses thick stick 4 to screw, lifting trim ring 5, and it is urgent in trim ring 5 and 2 no gaps of backing plate to penetrate taper key 3, is forced into 1500T gradually;
H. car centre bore: for the first time behind the die mould car centre bore to preliminary dimension;
I. prepare before the die mould for the second time: assemble patrix that closes the secondary press mould 6 and forcing press, patrix 6 and counterdie 7 proofread and correct concentric after, fix again and close counterdie 7;
J. die mould for the second time: the copper shield after the one-shot forming 1 is hung onto in the post forming mould; To adorn and press thick stick 4 to screw, lifting trim ring 5, dress taper key 3 is urgent; Be forced into 1500T during die mould gradually, above-mentioned technology is steam turbine generator copper shield global formation method of manufacturing technology.
Be illustrated in figure 1 as steam turbine generator copper shield structural representation.Whole copper shield is formed by 4 sections, through 3 arc transition.
Be illustrated in figure 2 as process principle schematic of the present invention.Counterdie 7 is critical pieces of accomplishing the die mould task with patrix 6, and the copper coin body is pressed thick stick 4, taper key 3 to be fixed on the counterdie by trim ring 5, backing plate 2, dress, and patrix 6 is demountable structures, to accomplish moulding for the first time and moulding for the second time respectively.
Need with equipment:
● heating furnace
● particular manufacturing craft
● the 2000t hydraulic press
● tape measure
● sledgehammer
● the high light torch
● CUT
● lathe
Concrete processing step:
● blanking, to get the raw materials ready according to the figure paper size according to drawing blank size buying copper coin or employing CUT, hydraulic press flattens after the blanking, and flatness is not more than 3mm.
● prepare before the annealing, copper coin is lain against special-purpose annealing supporting tool upper surface, upper surface is apart from furnace bottom 340mm, and supporting steel plate thickness is 40mm at least.
● soft annealing: according to special-purpose annealing curve copper coin is carried out soft annealing, temperature retention time 2 hours 30 minutes.
● turning: reserve surplus according to the figure paper size, processing copper coin cylindrical, burr is removed in polishing.
● prepare before the die mould for the first time: the oxide skin on the cleaning copper coin, brush with wire brush in case of necessity, whether inspection each part of pressure-type tool and surface thereof be intact handles in case of necessity.
● the pressure testing of die mould for the first time: pressure-type tool being incorporated on the hydraulic press, is accomplished a pressure testing, and the inspection mould is installed and the operating process stable case.
● die mould for the first time: copper coin placed on the counterdie plane align, dress presses thick stick to screw, and the lifting trim ring penetrates that taper key is urgent not to have the gap between trim ring and backing plate, is forced into 1500T gradually.
● the car centre bore: for the first time behind the die mould car centre bore to preliminary dimension.
● prepare before the die mould for the second time: assemble patrix that closes the secondary press mould and forcing press.After upper and lower mould is proofreaied and correct with one heart, fixing again closing counterdie.
● die mould for the second time: the copper shield after the one-shot forming is hung onto in the post forming mould, will adorn and press thick stick to screw, the lifting trim ring, it is urgent to adorn taper key, is forced into 1500T during die mould gradually.
Production efficiency of the present invention greatly improves, and has shortened manufacturing cycle, has reduced manufacturing cost, has solved the bad problem of weld size stability after the moulding of copper shield single-piece.
Claims (1)
1. steam turbine generator copper shield global formation method of manufacturing technology is characterized in that:
A. get the raw materials ready according to the drawing blank size: get the raw materials ready according to the figure paper size according to drawing blank size buying copper coin or employing CUT, hydraulic press flattens after the blanking;
B. prepare before the annealing: copper coin is lain against special-purpose annealing supporting tool upper surface, and upper surface is apart from furnace bottom 340mm;
C. soft annealing: according to special-purpose annealing curve copper coin is carried out soft annealing, temperature retention time 2 hours 30 minutes;
D. turning: reserve surplus according to the figure paper size, processing copper coin cylindrical, burr is removed in polishing;
E. prepare before the die mould for the first time: the oxide skin on the cleaning copper coin, brush with wire brush in case of necessity, whether inspection each parts of pressure-type tool and surface thereof be intact, handles in case of necessity;
F. the pressure testing of die mould for the first time: pressure-type tool being incorporated on the hydraulic press, is accomplished a pressure testing, and the inspection mould is installed and the operating process stable case;
G. die mould for the first time: copper coin placed on counterdie (7) plane align, dress presses thick stick (4) to screw, and lifting trim ring (5) penetrates that taper key (3) is urgent not to have the gap between trim ring (5) and backing plate (2), is forced into 1500T gradually;
H. car centre bore: for the first time behind the die mould car centre bore to preliminary dimension;
I. prepare before the die mould for the second time: assemble patrix that closes the secondary press mould (6) and forcing press, patrix (6) and counterdie (7) proofread and correct concentric after, fix again and close counterdie (7);
J. die mould for the second time: the copper shield after the one-shot forming (1) is hung onto in the post forming mould; To adorn and press thick stick (4) to screw; Lifting trim ring (5); Dress taper key (3) is urgent, is forced into 1500T during die mould gradually, and above-mentioned technology is steam turbine generator copper shield global formation method of manufacturing technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103470230A CN102825433A (en) | 2012-09-19 | 2012-09-19 | Integral molding manufacturing process method of steam turbine generator copper shield |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103470230A CN102825433A (en) | 2012-09-19 | 2012-09-19 | Integral molding manufacturing process method of steam turbine generator copper shield |
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| CN102825433A true CN102825433A (en) | 2012-12-19 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4633554A (en) * | 1985-08-08 | 1987-01-06 | Westinghouse Electric Corp. | Method for repairing a steam turbine or generator rotor |
| CN2613921Y (en) * | 2003-03-06 | 2004-04-28 | 上海汽轮发电机有限公司 | End copper shielded double-water internal cooling turbine generator |
| IN192646B (en) * | 1994-09-16 | 2004-05-08 | Gellert Jobst U | |
| JP2004183662A (en) * | 2002-12-04 | 2004-07-02 | General Electric Co <Ge> | Method of manufacturing nozzle box assembly of steam turbine |
| CN201465891U (en) * | 2009-06-01 | 2010-05-12 | 成都凯赛尔电子有限公司 | Integrated oxygen free copper shielding cylinder for vacuum arc extinguish chamber |
| CN201549348U (en) * | 2009-11-13 | 2010-08-11 | 山东电力设备厂 | Shielding device of transformer ascending flanged base |
-
2012
- 2012-09-19 CN CN2012103470230A patent/CN102825433A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4633554A (en) * | 1985-08-08 | 1987-01-06 | Westinghouse Electric Corp. | Method for repairing a steam turbine or generator rotor |
| IN192646B (en) * | 1994-09-16 | 2004-05-08 | Gellert Jobst U | |
| JP2004183662A (en) * | 2002-12-04 | 2004-07-02 | General Electric Co <Ge> | Method of manufacturing nozzle box assembly of steam turbine |
| CN2613921Y (en) * | 2003-03-06 | 2004-04-28 | 上海汽轮发电机有限公司 | End copper shielded double-water internal cooling turbine generator |
| CN201465891U (en) * | 2009-06-01 | 2010-05-12 | 成都凯赛尔电子有限公司 | Integrated oxygen free copper shielding cylinder for vacuum arc extinguish chamber |
| CN201549348U (en) * | 2009-11-13 | 2010-08-11 | 山东电力设备厂 | Shielding device of transformer ascending flanged base |
Non-Patent Citations (1)
| Title |
|---|
| 徐哉航等: "优化300MW汽轮发电机用铜屏蔽环成型工艺研究", 《科技情报》 * |
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Application publication date: 20121219 |