CN101767172B - Hot extrusion molding method for pipe nozzle of main steam super pipeline - Google Patents
Hot extrusion molding method for pipe nozzle of main steam super pipeline Download PDFInfo
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- CN101767172B CN101767172B CN2009102734884A CN200910273488A CN101767172B CN 101767172 B CN101767172 B CN 101767172B CN 2009102734884 A CN2009102734884 A CN 2009102734884A CN 200910273488 A CN200910273488 A CN 200910273488A CN 101767172 B CN101767172 B CN 101767172B
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Abstract
The invention discloses a hot extrusion molding method for a pipe nozzle of a main steam super pipeline, which relates to a hot extrusion molding method for utilizing a whole set of dedicated molding die to forge the pipe nozzle of the nuclear power main steam super pipeline. A steel pipe blank is mechanically processed into a main pipe blank with qualified dimension. A preset hole is arranged according to the position of the pipe nozzle of the super pipeline. The operation of positioning the three centers of a punch, the preset hole and a female die is completed by utilizing the female die and a supporting positioning pin. The position, i.e. the peripheral region of the preset hole which needs to be extruded, is heated. An inverted extrusion pressure is applied from the inside of the pipe blank to outside to make a parent metal of the steel pipe blank plastically deformed outward and molded into the pipe nozzle with the required dimension. Compared with the conventional welding method, the method not only can realize connection between the pipe nozzle and the female pipe, does not cut off the fibers of the steel female pipe and the pipe nozzle, but also does not need to weld, realizes the integrated molding of the super pipeline and the pipe nozzle, improves the internal quality of the super pipeline and achieves the requirements of the design party for the product.
Description
Technical field
The present invention relates to a kind of a whole set of moulding mould special forging nuclear power main steam super pipeline hot extrusion molding method for pipe nozzle that utilizes.
Background technology
At present, nuclear energy power generation market both at home and abroad is huge, and nuclear power technology updates very fast.Super pipeline is the important component part of jet chimney, and the production technology of pipe nozzle of main steam super pipeline changes according to the nuclear power designing requirement.According to the nuclear power designing requirement, the ozzle of main steam super pipeline must be managed the solid forging moulding with mother, makes the fiber of ozzle and pipeline continuous; This just requires the ozzle of super pipeline can not be by previous welding manner moulding.
Utilize the ozzle of the super pipeline of produced in conventional processes, its connected mode is welding, and difficult quality satisfies the applying working condition requirement of nuclear power complexity.New nuclear power designing requirement ozzle and female pipe solid forging moulding, and in forming process, how to locate alignment, make the ozzle each side size of moulding comparatively even, reach designing requirement, be very difficult.
Summary of the invention
The objective of the invention is at above-mentioned present situation, aim to provide a kind of pitch of holes that can solve in the pipe nozzle of main steam super pipeline production process and determine difficulty and the uneven hot extrusion molding method for pipe nozzle of main steam super pipeline of distortion.
The implementation of the object of the invention is, hot extrusion molding method for pipe nozzle of main steam super pipeline, and concrete steps are:
1) by steel-making, oxyacetylene metal-cutting steel ingot rising head, punching, drawing, blank heat treatment, the molded blank pipeline, machining obtains qualified mother's pipe;
2) the ozzle position according to super pipeline is provided with preset holes, chooses die and supporting special-purpose alignment pin, installs die socket;
3) earlier the V-arrangement support anvil is hung on the hydraulic press platform, support bar is passed female pipe pipe, hang down, according to technology primary and secondary spring pedestal is set simultaneously, the mounting spring seat hangs on platform with another V-arrangement support anvil then, controls between the two position well, the mother's pipe that passes support bar is placed on the spring base, guarantees that simultaneously support bar drops on the V-type support anvil on both sides;
4) adjust the position of support bar in steel pipe, make support bar be in center position in female pipe pipe, and pipeline and support bar hung on the V-arrangement support anvil, the preset holes central vertical of female pipe pipe is made progress, adjust the position of support bar simultaneously, make pipeline preset holes center line, adjust the drift position perpendicular to center line in the T type groove, make it to be under the preset holes and record position, pull out drift;
5) special-purpose alignment pin is put into the hole of die, special-purpose hook catches on the lifting dedicated slot on female pipe pipe both sides, with the top that die socket steadily lifts by crane preset holes, the female preset holes of managing pipe of tapering part insertion with special-purpose alignment pin rises and falls for several times, find the optimum position, special-purpose alignment pin can freely be come off when driving is removed, and local heat reaches after the condition, repeats above-mentioned action rapidly, make the die position of aliging, finish drift, preset holes, the location work of die three-core;
6) need the extruding position with the local heater heating, be φ 400mm zone around the preset holes, adjust the fire baffle disk in the pipeline before the local heat, the other end is placed the drift that has installed in advance, local heat 30-50 minute, temperature is 1250-1280 ℃, is incubated 5-10 minute, after treating the steel pipe heating region and flame color being consistent, pull out the fire baffle disk of local heater, push away drift and be reduced to former record position, made the die position that falls by alignment pin rapidly, took away supporting special-purpose alignment pin;
7) start forcing press, the beginning squeeze job with support bar, female pipe pipe and die socket three compacting, after squeeze job is finished, detects the heat treatment of mother's pipe, roughing, nondestructive inspection during operation, and the water pressure test gets main steam super pipeline after the performance test.
The present invention is machined into the qualified mother's pipe of size with steel tube blank, ozzle position according to super pipeline is provided with preset holes, utilize die and supporting alignment pin to finish drift, preset holes, the location work of die three-core, heating needs the extruding position, it is the preset holes peripheral region, in mother's pipe, outwards apply backward extrusion power, make the ozzle of the outside plastic deformation moulding of female pipe pipe mother metal required size.The present invention compares with traditional welding method, can make ozzle realize being connected with female pipe pipe, does not cut off the fiber of steel pipe female pipe pipe and ozzle; Do not need simultaneously welding again, realized the moulding on the whole of super pipeline and ozzle, improved the inherent quality of super pipeline, reached of the requirement of design side product.
Description of drawings
Fig. 1 is the whole frock schematic diagram of nozzle molding,
Fig. 2 is the whole frock sectional view in nozzle molding alignment pin alignment back,
The anti-schematic diagram of wearing when Fig. 3 is the target product nozzle molding,
Fig. 4 is that material therefor changes the contrast schematic diagram before and after the nozzle molding,
Fig. 5 is female pipe pipe schematic diagram,
Fig. 6 is the ozzle schematic diagram after the moulding.
The specific embodiment
The present invention is described in detail in detail with reference to the accompanying drawings.
By steel-making, oxyacetylene metal-cutting steel ingot rising head, punching, drawing, blank heat treatment, the molded blank pipeline, machining obtains qualified mother's pipe.
Utilize the method for the patent of invention " being applied to the nuclear power main steam super pipeline setting method of nozzle molding preset holes " that the applicant applies for that preset holes is set.Choose die and supporting alignment pin, install die socket.
The concrete grammar that preset holes is set is, on qualified mother's pipe, confirm the position of four preset holes, the drift when determining the extruding ozzle and the size of die, according to the constancy of volume principle, ignore the influence that the pipe deformation plance is an elliptical arc surface simultaneously, standard pipe is got thick 49.8mm, and the local heat oxidational losses is calculated by thick 0.8mm, by formula (Φ
2-φ
2) * H=(φ
2-Δ φ
2) * δ calculates the preset holes diameter, and Φ represents ozzle cylindrical average diameter in the formula, and φ represents ozzle endoporus average diameter, and H represents the height after the ozzle expectation moulding, and Δ φ represents the diameter of preset holes, and δ represents that pipe can utilize thickness.
Earlier V-arrangement support anvil 1 is hung on the hydraulic press platform, support bar 2 is passed female pipe pipe 3, hang down, the while sets primary and secondary spring pedestal according to technology, and mounting spring seat 9 hangs on platform with another V-arrangement support anvil then, controls between the two position well.The mother's pipe 3 that passes support bar is placed on (see figure 1) on the spring base, guarantee that simultaneously support bar drops on the V-type support anvil 1 on both sides, adjust the entire die framework to optimum state, promptly female pipe pipe level, preset holes is adjusted the position (seeing Fig. 1,2) of drift 8 vertically upward, and drift is aimed under the preset holes, and record position, pull out drift.
Special-purpose alignment pin 5 is put into the hole (see figure 2) of die 6, special-purpose hook catches on lifting dedicated slot 12 (see figure 5)s on female pipe pipe both sides, die socket 4 is steadily lifted by crane the top of preset holes 7, the tapering part of special-purpose alignment pin is inserted the preset holes of female pipe pipe, rise and fall for several times, find the optimum position, special-purpose alignment pin can when removing, freely be come off in driving, local heat reaches after the condition, repeat above-mentioned action rapidly, make the die position of aliging, finish drift, preset holes, die three-core location work (see figure 3).
Need extruding position, i.e. φ 400mm zone around the preset holes with the local heater heating.Adjust the fire baffle disk in the pipeline before the local heat, the other end is placed the drift that has installed in advance, local heat 30-50 minute, temperature is 1250-1280 ℃, is incubated 5-10 minute, after treating the steel pipe heating region and flame color being consistent, pull out the fire baffle disk of local heater, push away drift and be reduced to former record position, made the die position that falls by alignment pin rapidly, took away special-purpose alignment pin.
Start forcing press, the beginning squeeze job, during operation with support bar, steel pipe base and die socket three compacting.Require this a series of operating in the extremely short time to finish, the time is short more good more.
After squeeze job is finished, the heat treatment of mother's pipe, roughing, nondestructive inspection are detected, after physical and chemical inspection is qualified, carry out functional trial, fine finishining, packing, protection are paid the user and are used.
The present invention is directed to this special product of pipe nozzle of main steam super pipeline, use special frock to obtain product.The present invention passes through local heat, under the rigidity situation of guaranteeing female pipe pipe, utilize the free telescopic action of spring base, with the rigidity of pressure by female pipe pipe, be delivered on the spring, simultaneously by support bar and V-type support anvil, drift is fixed, female pipe pipe is under die socket and spring base clamping, whole descending, be fixed on anti-preset holes (see figure 4), the drift of passing of drift motionless on the support bar, die forms the confined space (see figure 3), drift 8 is stamped into female pipe pipe to form ozzle wall part 10 with the redundance on mother's pipe 1 11, and promptly redundance 11 is become ozzle wall part 10 (Fig. 4) by counter the wearing of drift.Thereby obtain target product one ozzle 13 (see figure 6)s.
Adopted the present invention's success moulding 1#, 2#, 3#, 4# ozzle through detecting, all reaches designing requirement.
Claims (2)
1. hot extrusion molding method for pipe nozzle of main steam super pipeline is characterized in that concrete steps are:
1) by steel-making, oxyacetylene metal-cutting steel ingot rising head, punching, drawing, blank heat treatment, the molded blank pipeline, machining obtains qualified mother's pipe;
2) the ozzle position according to super pipeline is provided with preset holes, chooses die and supporting special-purpose alignment pin, installs die socket;
3) earlier the V-arrangement support anvil is hung on the hydraulic press platform, support bar is passed female pipe pipe, hang down, according to technology primary and secondary spring pedestal is set simultaneously, the mounting spring seat hangs on platform with another V-arrangement support anvil then, controls between the two position well, the mother's pipe that passes support bar is placed on the spring base, guarantees that simultaneously support bar drops on the V-type support anvil on both sides;
4) adjust the position of support bar in steel pipe, make support bar be in center position in female pipe pipe, and pipeline and support bar hung on the V-arrangement support anvil, the preset holes central vertical of female pipe pipe is made progress, adjust the position of support bar simultaneously, make pipeline preset holes center line, adjust the drift position perpendicular to center line in the T type groove, make it to be under the preset holes and record position, pull out drift;
5) special-purpose alignment pin is put into the hole of die, special-purpose hook catches on the lifting dedicated slot on female pipe pipe both sides, with the top that die socket steadily lifts by crane preset holes, the female preset holes of managing pipe of tapering part insertion with special-purpose alignment pin rises and falls for several times, find the optimum position, special-purpose alignment pin can freely be come off when driving is removed, and local heat reaches after the condition, repeats above-mentioned action rapidly, make the die position of aliging, finish drift, preset holes, the location work of die three-core;
6) need the extruding position with the local heater heating, be φ 400mm zone around the preset holes, adjust the fire baffle disk in the pipeline before the local heat, the other end is placed the drift that has installed in advance, local heat 30-50 minute, temperature is 1250-1280 ℃, is incubated 5-10 minute, after treating the steel pipe heating region and flame color being consistent, pull out the fire baffle disk of local heater, push away drift and be reduced to former record position, made the die position that falls by alignment pin rapidly, took away supporting special-purpose alignment pin;
7) start forcing press, the beginning squeeze job with support bar, female pipe pipe and die socket three compacting, after squeeze job is finished, detects the heat treatment of mother's pipe, roughing, nondestructive inspection during operation, and the water pressure test gets main steam super pipeline after the performance test.
2. hot extrusion molding method for pipe nozzle of main steam super pipeline according to claim 1, it is characterized in that the concrete grammar that preset holes is set is, on qualified mother's pipe, confirm the position of four preset holes, the drift when determining the extruding ozzle and the size of die, according to the constancy of volume principle, ignore the influence that the pipe deformation plance is an elliptical arc surface simultaneously, standard pipe is got thick 49.8mm, the local heat oxidational losses is calculated by thick 0.8mm, by formula (Φ
2-φ
2) * H=(φ
2-Δ φ
2) * δ calculates the preset holes diameter, and Φ represents ozzle cylindrical average diameter in the formula, and φ represents ozzle endoporus average diameter, and H represents the height after the ozzle expectation moulding, and Δ φ represents the diameter of preset holes, and δ represents that pipe can utilize thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009102734884A CN101767172B (en) | 2009-12-31 | 2009-12-31 | Hot extrusion molding method for pipe nozzle of main steam super pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102734884A CN101767172B (en) | 2009-12-31 | 2009-12-31 | Hot extrusion molding method for pipe nozzle of main steam super pipeline |
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| CN101767172A CN101767172A (en) | 2010-07-07 |
| CN101767172B true CN101767172B (en) | 2011-11-02 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783191B (en) * | 2009-01-21 | 2012-05-16 | 中国核电工程有限公司 | Super pipeline for nuclear power plant as well as manufacturing method thereof |
| CN102211269A (en) * | 2010-12-30 | 2011-10-12 | 武汉重工铸锻有限责任公司 | Method for controlling phase position of nuclear power main steam super pipeline nozzle |
| CN102527828B (en) * | 2011-12-26 | 2014-06-04 | 武汉重工铸锻有限责任公司 | Dynamic level and balance follow control method of super pipeline nozzle forming process |
| CN102921764B (en) * | 2012-07-10 | 2014-10-22 | 清华大学 | Molding method and molding apparatus for pipe structure having nozzle boss |
| CN102785183B (en) * | 2012-08-31 | 2015-06-10 | 渤海重工管道有限公司 | Method and device for positioning dual-hole diamond-shaped pin of hot extruded and extracted pipe nozzle of nuclear power main steam super pipeline |
| CN102794329B (en) * | 2012-08-31 | 2015-07-15 | 渤海重工管道有限公司 | Manufacturing equipment for nozzle of main steam super pipeline of nuclear power and pulling and extrusion manufacturing process for nozzle |
| CN103658208A (en) * | 2013-11-26 | 2014-03-26 | 北京首宏钢重型装备技术有限公司 | One-step forming technology of nozzle of nuclear power main-steam super pipeline |
| CN103722036B (en) * | 2013-12-17 | 2016-02-03 | 河北宏润核装备科技股份有限公司 | A kind of nuclear power super pipeline ozzle draw device and method |
| CN107471614B (en) * | 2017-08-08 | 2021-07-13 | 中国铁路总公司 | Method for forming plastic corrugated pipe with bealock |
| CN108213295B (en) * | 2017-12-29 | 2019-07-16 | 二重（德阳）重型装备有限公司 | Ozzle forging method and nuclear power main pump pump case profiling forging technology |
| CN112846057B (en) * | 2021-02-20 | 2022-06-21 | 中国第一重型机械股份公司 | Integral profiling extrusion method for thin-wall pipeline with multiple nozzles |
| CN114378235A (en) * | 2022-01-07 | 2022-04-22 | 江苏新恒基特种装备股份有限公司 | Forming device and method for thick-wall pipe nozzle of pipeline |
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| EP0005177B1 (en) * | 1978-05-01 | 1981-08-12 | Westinghouse Electric Corporation | Tube bundle removal method and apparatus |
| EP0626232A1 (en) * | 1993-05-26 | 1994-11-30 | Westinghouse Electric Corporation | Device and method for sleeving an inside surface of a tube |
| CN101398165A (en) * | 2008-10-30 | 2009-04-01 | 贵州航天新力铸锻有限责任公司 | Major vapour inlet/outlet joint pipe for nuclear plant steam generator and forging method thereof |
| CN101579715A (en) * | 2009-07-02 | 2009-11-18 | 无锡市新峰管业有限公司 | Improved hyper pipeline pipe-branch forming process |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0005177B1 (en) * | 1978-05-01 | 1981-08-12 | Westinghouse Electric Corporation | Tube bundle removal method and apparatus |
| EP0626232A1 (en) * | 1993-05-26 | 1994-11-30 | Westinghouse Electric Corporation | Device and method for sleeving an inside surface of a tube |
| CN101398165A (en) * | 2008-10-30 | 2009-04-01 | 贵州航天新力铸锻有限责任公司 | Major vapour inlet/outlet joint pipe for nuclear plant steam generator and forging method thereof |
| CN101579715A (en) * | 2009-07-02 | 2009-11-18 | 无锡市新峰管业有限公司 | Improved hyper pipeline pipe-branch forming process |
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| CN101767172A (en) | 2010-07-07 |
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