CN101077515A - Process for manufactruing super large oblique three-way - Google Patents

Process for manufactruing super large oblique three-way Download PDF

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Publication number
CN101077515A
CN101077515A CN 200710041607 CN200710041607A CN101077515A CN 101077515 A CN101077515 A CN 101077515A CN 200710041607 CN200710041607 CN 200710041607 CN 200710041607 A CN200710041607 A CN 200710041607A CN 101077515 A CN101077515 A CN 101077515A
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CN
China
Prior art keywords
forging
stock
main aperture
punching
skew
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.)
Pending
Application number
CN 200710041607
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Chinese (zh)
Inventor
王兴中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI XIN MIN HEAVY DUTY FORGING CO Ltd
Original Assignee
SHANGHAI XIN MIN HEAVY DUTY FORGING CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHANGHAI XIN MIN HEAVY DUTY FORGING CO Ltd filed Critical SHANGHAI XIN MIN HEAVY DUTY FORGING CO Ltd
Priority to CN 200710041607 priority Critical patent/CN101077515A/en
Publication of CN101077515A publication Critical patent/CN101077515A/en
Pending legal-status Critical Current

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Abstract

The present invention relates to pressure container and pipeline technology, and is especially process of manufacturing very large T-junction. The manufacturing process includes the following steps: forging blank, forging central hole and punching to form the inclined main hole. The present invention has the advantages of lowered production cost, short manufacture period and high product quality.

Description

Process for manufactruing super large oblique three-way
Technical field
The present invention relates to the pressure vessel conduit class, relate to a kind of ultra-large type threeway manufacture method concretely.
Background technology
Skew T is mainly used in the threeway of large-sized boiler pressure vessel conduit, volume is big, complex-shaped, three holes to be processed into required state quite complicated technically, the manufacture difficulty of skew T is quite big, the height that all kinds of test stones are suitable again, it is quite big to produce this series products difficulty, the fine finishining of selecting materials from the beginning, all quite important, the present main dependence on import of this product, the skew T product main aperture technology of external import is after being forged by whole block material, press directly with lathe that figure paper size car becomes, spend a large amount of man-hours and manpower with lathe Che Kongxu, the cost of product is very high, and can't eliminate the loose part in the inside of causing with the method for car and remove, will certainly influence product quality to a certain extent because of material thickness reason.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of ultra-large type threeway manufacture method is provided, this method is directly used the technology of forging punching with the skew T main aperture, and by increasing surplus method when the preparation that forges stock, the main aperture position of skew T is in the centre of whole block material when guaranteeing to forge.
The forging main aperture method of punching, quite difficult on FMT, because the inclination of the position in hole the middle of material (not), if directly forge with 8 tons of hammers, can cause the inclination in the cross section of entire product, make the product distortion, directly influence the quality in the process of producing product, produce great scrappage.The present invention adopts the method that increases clout, makes the main aperture of skew T be in the centre of whole block material, changes the situation of main aperture off-centre, more unnecessary part is excised after forging end afterwards, has realized that the skew T main aperture is with forging punching.
The object of the invention realizes being finished by following technical scheme:
A kind of process for manufactruing super large oblique three-way is characterized in that this method comprises following step: the preparation that forges stock; The shaping of skew T main aperture is handled, and wherein this shaping is handled by forging punching and realized, when forging punching, the position of main aperture is in the positive center of stock that forges when forging, and the forging distortion is stressed evenly during with the assurance punching; Forge post processing, comprising the processing again of main aperture and the processing in secondary hole.
When the preparation that forges stock, according to the shape of described skew T, the size that size is determined stock, be the side of center with the main aperture position simultaneously, and leave surplus, be in the positive center of stock that forges with the position that guarantees main aperture with secondary hole site one side symmetry place at stock.
Described surplus, finish main aperture forge punching after, according to the dimensional requirement of required skew T, it is removed forging post-processing stages.
Advantage of the present invention is, the present situation that has replaced long-term import, reduce production costs, manpower and time have been saved greatly, reduced the processing duration, adopt to have forged punching and cause the loose defective of inner materials to remove invar ingot thickness, the detected values such as yield force, pulling force, stretching force, section face shrinkage rates of product are higher than about external imported product 5%-6%, product quality is higher than external imported product far away, and technology is led over external product.
Description of drawings
Accompanying drawing 1 is skew T cross-sectional view of the present invention;
Accompanying drawing 2 forges the stock cross-sectional view for the present invention;
Accompanying drawing 3 is the side view of accompanying drawing 2.
The specific embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:
As Figure 1-3, label 1-6 represents respectively: stock 1, main aperture 2, surplus 3, secondary hole 4, test specimen 5, test specimen 6.
The process for manufactruing super large oblique three-way that present embodiment relates to comprises following step:
(1) steel ingot is forged become to meet following requirement forge stock 1: according to the shape of described skew T, the size that size is determined stock, be the center with main aperture 2 positions simultaneously, side at stock 1, and the place leaves surplus 3 with 4 positions, secondary hole, one side symmetry, is in the stock 1 positive center that forges with the position that guarantees main aperture 2.
(2) carry out skew T main aperture 2 in the position that forges main aperture 2 on the stock 1 and forge punching, reaming, when forging punching, the position of main aperture 2 is in the stock 1 positive center that forges, and the forging distortion is stressed evenly during with the assurance punching;
(3) forge post processing, comprise the steps:
Forge after-baking: utilize rated power forging to be done annealing heat treatment for the bench vehicle type electrical resistance furnace of 420KW, because of the big characteristics of material behavior and forging must forge finish after heat shove charge annealing and the temperature retention time of must guaranteeing to anneal eliminating the forging internal stress, otherwise forging is very easy to explosion.
Pre-test processing, pre-test: light (improving the accuracy of flaw detection) is seen in six face roughing of forging stock 1, by standard ultrasonic wave is made on six surfaces of forging and detected a flaw for the first time.
Saw removes surplus 3: require line according to appearance and size before the heat treatment, saw removes originally because of satisfying surplus 3 of the material that forging condition increases more.
Roughing, flaw detection: again with forging stock 1 roughing (comprising the major and minor hole of boring) size to the heat treatment, polishing endoporus and outer surface edges and corners were fillet after pre-test was qualified; By standard forging is done ultrasonic examination.
Electric furnace is done normalizing+tempering heat treatment: utilize rated power for the bench vehicle type electrical resistance furnace of 420KW forging to be made normalizing+tempering heat treatment.
The saw sample: do one and draw three impact machines, the thick test specimen of a slice 30mm 5 is respectively sawed in main aperture two ends and secondary hole end surface in heat treatment cooling back, test specimen 6,180 degree are materialsed.
Roughing, ultrasonic examination: forging profile and major-minor hole are machined to the roughing size; Do ultrasonic examination (visiting eventually) by standard.
Fine finishining: to skew T fine finishining, carry out finish turning with vertical lathe and boring machine respectively to profile, major-minor hole and groove by the requirement of fine finishining drawing.
Penetrant inspection: three hipped end oral thermometer faces are done penetrant inspection by the JB4730 standard.

Claims (3)

1. a process for manufactruing super large oblique three-way is characterized in that this method comprises following step: the preparation that forges stock; The shaping of skew T main aperture is handled, and wherein this shaping is handled by forging punching and realized, when forging punching, the position of main aperture is in the positive center of stock that forges when forging, and the forging distortion is stressed evenly during with the assurance punching; Forge post processing, comprising the processing again of main aperture and the processing in secondary hole.
2. a kind of process for manufactruing super large oblique three-way according to claim 1, it is characterized in that when the preparation that forges stock, according to the shape of described skew T, the size that size is determined stock, be the side of center with the main aperture position simultaneously at stock, and the place leaves surplus with secondary hole site one side symmetry, is in the positive center of stock that forges with the position that guarantees main aperture.
3. a kind of process for manufactruing super large oblique three-way according to claim 2 is characterized in that described surplus, finish main aperture forge punching after, according to the dimensional requirement of required skew T, it is removed forging post-processing stages.
CN 200710041607 2007-06-04 2007-06-04 Process for manufactruing super large oblique three-way Pending CN101077515A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200710041607 CN101077515A (en) 2007-06-04 2007-06-04 Process for manufactruing super large oblique three-way

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200710041607 CN101077515A (en) 2007-06-04 2007-06-04 Process for manufactruing super large oblique three-way

Publications (1)

Publication Number Publication Date
CN101077515A true CN101077515A (en) 2007-11-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200710041607 Pending CN101077515A (en) 2007-06-04 2007-06-04 Process for manufactruing super large oblique three-way

Country Status (1)

Country Link
CN (1) CN101077515A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489587A (en) * 2011-11-29 2012-06-13 上海新闵重型锻造有限公司 Forging pore-forming method of large forging eccentric pores
CN102962635A (en) * 2012-10-22 2013-03-13 上海锐迈重工有限公司 Method for producing high-yield value pipeline ball-passing tee joint
CN103692149A (en) * 2012-09-27 2014-04-02 江苏威鹰机械有限公司 Precision forging plastic molding production process of filter shell
CN104722702A (en) * 2014-11-14 2015-06-24 上海新闵(东台)重型锻造有限公司 Forging forming technology for high-temperature steam pipeline of supercritical unit
CN104942212A (en) * 2014-03-31 2015-09-30 河北汇中管道装备有限公司 Improvement in forging technology for manufacturing large tee joint through composite board
CN105252230A (en) * 2015-12-01 2016-01-20 河北宏润核装备科技股份有限公司 Machining process for inclined tee
CN105327970A (en) * 2015-12-03 2016-02-17 应敏燕 Red punching forming process for three-way pipe joint
CN106391981A (en) * 2016-09-22 2017-02-15 东南大学 Hammer forging forming method for external contours of inclined tee joints for main steam pipelines of ultra supercritical units
CN107876677A (en) * 2016-09-30 2018-04-06 上海昌强重工机械有限公司 A kind of large bevel tee die forging production technology and mould

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102489587A (en) * 2011-11-29 2012-06-13 上海新闵重型锻造有限公司 Forging pore-forming method of large forging eccentric pores
CN103692149A (en) * 2012-09-27 2014-04-02 江苏威鹰机械有限公司 Precision forging plastic molding production process of filter shell
CN103692149B (en) * 2012-09-27 2015-12-02 江苏威鹰机械有限公司 Filter housings finish forge plastic forming production technology
CN102962635A (en) * 2012-10-22 2013-03-13 上海锐迈重工有限公司 Method for producing high-yield value pipeline ball-passing tee joint
CN104942212A (en) * 2014-03-31 2015-09-30 河北汇中管道装备有限公司 Improvement in forging technology for manufacturing large tee joint through composite board
CN104942212B (en) * 2014-03-31 2017-09-05 河北汇中管道装备有限公司 Composite board makes large-scale threeway forging process
CN104722702A (en) * 2014-11-14 2015-06-24 上海新闵(东台)重型锻造有限公司 Forging forming technology for high-temperature steam pipeline of supercritical unit
CN104722702B (en) * 2014-11-14 2015-10-28 上海新闵(东台)重型锻造有限公司 Supercritical unit high temperature steam pipeline forging molding process
CN105252230A (en) * 2015-12-01 2016-01-20 河北宏润核装备科技股份有限公司 Machining process for inclined tee
CN105252230B (en) * 2015-12-01 2017-05-24 河北宏润核装备科技股份有限公司 Machining process for inclined tee
CN105327970A (en) * 2015-12-03 2016-02-17 应敏燕 Red punching forming process for three-way pipe joint
CN106391981A (en) * 2016-09-22 2017-02-15 东南大学 Hammer forging forming method for external contours of inclined tee joints for main steam pipelines of ultra supercritical units
CN107876677A (en) * 2016-09-30 2018-04-06 上海昌强重工机械有限公司 A kind of large bevel tee die forging production technology and mould

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