CN201783608U - Special die for die forging of last-stage blades of large-sized half-speed nuclear steam turbine - Google Patents
Special die for die forging of last-stage blades of large-sized half-speed nuclear steam turbine Download PDFInfo
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- CN201783608U CN201783608U CN2010205251380U CN201020525138U CN201783608U CN 201783608 U CN201783608 U CN 201783608U CN 2010205251380 U CN2010205251380 U CN 2010205251380U CN 201020525138 U CN201020525138 U CN 201020525138U CN 201783608 U CN201783608 U CN 201783608U
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Abstract
The utility model provides a special die for die forging of last-stage blades of a large-sized half-speed nuclear steam turbine. The special die is simple in structure, capable of forming blade forgings at one step, and effectively solving the forging displacement problem caused by larger lateral force during blade forging process and guaranteeing precision of the blade forgings, and comprises an upper die and a lower die, wherein guide posts are arranged at four corners of the upper die, and guide sleeves are correspondingly arranged on the lower die. The special die is characterized in that mutually sleeved lateral linear wall structures are arranged on the outer sides of cavities of the upper die and the lower die, and the guide posts and the guide sleeves are respectively distributed on the lateral linear wall structures of the upper die and the lower die.
Description
Technical field
The utility model relates to the hot-working technical field of mold, is specially large-scale half speed nuclear steam turbine final blades die forging particular manufacturing craft.
Background technology
General external large-scale half speed nuclear steam turbine final blades contour forging technique be with bar with hydraulic press or horizontal forging and upsetting machine heading after radial forging pulling base, then through blocking, finish forging, adopt in the mould room temperature pressurize to proofread and correct after the final heat treatment.Its shortcoming is: the blank shape of cross section after the radial forging pulling is for circular, owing to be subjected to the influence of blade profile shape, its forging molding must pass through blocking and finish-forging, this just needs to make blocker and finisher two secondary forging dies, and general blade production mould has the characteristics of the many kinds of small lot, it is higher that die cost accounts for the ratio of total manufacturing cost, thus its die cost height, the manufacturing cost height of blade; And because the blank cross section is more single circle, causes wide string blade to fill type and relatively take material, the stock utilization of forging is low, thereby also makes the manufacturing cost height of blade; And die forging needs blocking and finish-forging, and because of the mould volume is big, a press can't be installed two secondary forging dies simultaneously, so blocking and finish-forging can't carry out continuously, and its die forging cycle is long, and working (machining) efficiency is low.In order to address the above problem, present large-scale half speed nuclear steam turbine final blades contour forging technique, it adopts electric liquid hammer open die forging pulling base after bar is used the hydraulic press heading, blank after will pulling out is again put into forging mold and is carried out forging molding, then earnestly the removing of overlap, the thermal recalibration of die forging and last heat treatment is carried out in die forging; Because its pulling base adopts electric liquid hammer open die forging pulling base, make the cross section of its blank have circular cross-section and square-section (seeing Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8) simultaneously, forge the requirement of filling type so can satisfy wide string blade well, it is promptly plastic to make follow-up forging only need carry out the secondary forging die die forging of list, reduced the cost that a secondary mould is got the raw materials ready and made, shorten the die forging cycle, improved the production efficiency of blade forging.In addition, general blade forging die mostly is the guide frame of guide pillar guide pin bushing, because large-scale half speed nuclear steam turbine final blades are bigger owing to side force in die forging process, only adopt the guide frame of guide pillar guide pin bushing easily to cause the offsetting problem that blade forges, thereby influence the precision of blade die forging piece.
Summary of the invention
At the problems referred to above, the utility model provides large-scale half speed nuclear steam turbine final blades die forging particular manufacturing craft, it is simple in structure, but one-shot forming blade die forging piece, and can effectively solve the forging offsetting problem that causes greatly because of side force in the blade mould forging process, guarantee the precision of blade die forging piece.
Its technical scheme is such, it comprises patrix and counterdie, four jiaos of ends of described patrix are provided with guide pillar, described counterdie correspondence is provided with guide pin bushing, it is characterized in that: the die cavity outside of described patrix and counterdie corresponds to the straight wall construction of side of mutual fit, and described guide pillar and guide pin bushing are arranged in respectively on the straight wall construction of side of described patrix and counterdie.
It is further characterized in that: the guiding single face gap of described guide pillar and guide pin bushing is 0.6mm～0.7mm; It is 0.4mm～0.5mm that described patrix cooperates the single face gap with the straight wall of side of counterdie.
Particular manufacturing craft structure of the present utility model, its guide pillar and guide pin bushing structural configuration are on the straight wall construction of side, its whole process guide that can guarantee patrix and counterdie closure is accurate, solves blade because of the blade that side force causes greatly forges the offsetting problem, further guarantees the precision of blade die forging piece.
Description of drawings
Fig. 1 is a special-purpose mould sectional structure schematic diagram in the large-scale half speed nuclear steam turbine of the utility model final blades contour forging technique;
Fig. 2 is the blank structure schematic diagram of bar after radially pulling out base in the technology of the present invention;
Fig. 3 be among Fig. 2 A-A to the sectional structure schematic diagram;
Fig. 4 be among Fig. 2 B-B to the sectional structure schematic diagram;
Fig. 5 be among Fig. 2 C-C to the sectional structure schematic diagram;
Fig. 6 be among Fig. 2 D-D to the sectional structure schematic diagram;
Fig. 7 be among Fig. 2 E-E to the sectional structure schematic diagram;
Fig. 8 be among Fig. 2 F-F to the sectional structure schematic diagram.
The specific embodiment
See Fig. 1, particular manufacturing craft of the present utility model, it comprises patrix 1 and counterdie 2,1 four jiaos of ends of patrix are provided with guide pillar 3, counterdie 2 correspondences are provided with guide pin bushing 4, the die cavity outside of patrix 1 and counterdie 2 corresponds to the straight wall construction of side of mutual fit, and guide pillar 3 is arranged in respectively on the straight wall construction of side of described patrix and counterdie with guide pin bushing 4.Guide pillar 3 is 0.6mm～0.7mm with the guiding single face gap 6 of guide pin bushing 4; Patrix cooperates single face gap 7 to be 0.4mm～0.5mm with the straight wall of side of counterdie.Among Fig. 1,5 is blank.In the blank forging process, patrix 1 and counterdie 2 matched moulds, blank 5 has begun thick guiding with (be blank generation plastic deformation before) guide pillar 3 and guide pin bushing 4 before patrix 1 contacts, treat that the straight wall construction of side of patrix 1 and counterdie 2 just began smart guiding when blank 5 crimped onto less degree, end up to forging.Patrix 1 and the guide pillar guide pin bushing structure of counterdie 2 and cooperating of the straight wall construction of side can guarantee the accuracy that leads in the forging process, solve blade because of the blade that side force causes greatly forges lateral displacement and problem of misalignment, guarantee the precision of blade die forging piece.
Claims (3)
1. large-scale half speed nuclear steam turbine final blades die forging particular manufacturing craft, it comprises patrix and counterdie, four jiaos of ends of described patrix are provided with guide pillar, described counterdie correspondence is provided with guide pin bushing, it is characterized in that: the die cavity outside of described patrix and counterdie corresponds to the straight wall construction of side of mutual fit, and described guide pillar and guide pin bushing are arranged in respectively on the straight wall construction of side of described patrix and counterdie.
2. large-scale half speed nuclear steam turbine final blades die forging particular manufacturing craft according to claim 1, it is characterized in that: the guiding single face gap of described guide pillar and guide pin bushing is 0.6mm～0.7mm.
3. large-scale half speed nuclear steam turbine final blades die forging particular manufacturing craft according to claim 2, it is characterized in that: it is 0.4mm～0.5mm that described patrix cooperates the single face gap with the straight wall of side of counterdie.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205251380U CN201783608U (en) | 2010-09-11 | 2010-09-11 | Special die for die forging of last-stage blades of large-sized half-speed nuclear steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205251380U CN201783608U (en) | 2010-09-11 | 2010-09-11 | Special die for die forging of last-stage blades of large-sized half-speed nuclear steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201783608U true CN201783608U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205251380U Expired - Lifetime CN201783608U (en) | 2010-09-11 | 2010-09-11 | Special die for die forging of last-stage blades of large-sized half-speed nuclear steam turbine |
Country Status (1)
| Country | Link |
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| CN (1) | CN201783608U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430693A (en) * | 2010-09-11 | 2012-05-02 | 无锡透平叶片有限公司 | Special mould for last-stage blade of large half-speed nuclear turbine |
-
2010
- 2010-09-11 CN CN2010205251380U patent/CN201783608U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102430693A (en) * | 2010-09-11 | 2012-05-02 | 无锡透平叶片有限公司 | Special mould for last-stage blade of large half-speed nuclear turbine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110406 |