CN102581187B - Method for forging flat steel by using universal hammerhead - Google Patents
Method for forging flat steel by using universal hammerhead Download PDFInfo
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- CN102581187B CN102581187B CN201210039403.8A CN201210039403A CN102581187B CN 102581187 B CN102581187 B CN 102581187B CN 201210039403 A CN201210039403 A CN 201210039403A CN 102581187 B CN102581187 B CN 102581187B
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Abstract
A method for forging flat steel by using universal hammerheads comprises feeding red steels to a chamber heating furnace, quickly heating to 1170+/-50 DEG C, holding for 2h, performing cogging at a single-edge reduction amount of 40-45mm and a frequency of 180 times/min, forging billet material into an intermediate billet with a diameter of 440mm after three-pass forging, forging from a machine A to a machine B at a reduced frequency of 90 times/min, a single-edge reduction amount of the R group of hammerheads of 30-40mm, a forging force of the R group of hammerheads of 800-900t, a single-edge reduction amount of the L group of hammerheads of 3-5mm and a forging force of the L group of hammerheads of 150-200t, forging from the machine B to the machine A at the reduced frequency of 90 times/min, a single-edge reduction amount of the L group of hammerheads of 30-40mm, a forging force of the L group of hammerheads of 800-900t, a single-edge reduction amount of the R group of hammerheads of 3-5mm and a forging force of the R group of hammerheads of 150-200t, performing final-pass forging at a single-edge reduction amount of 2-5mm, a forging force of 100-150t and a finish forging temperature not lower than 850 DEG C, and shaping four edges of the forging. The once-heating of flat steel forging is effectively controlled, the once qualified rate of the method through test is 100%, the production efficiency is improved, and at the same time the cost is lowered.
Description
Technical field:
The invention belongs to footpath and forge the method for machine universal hammerhead forging flat steel, universal hammerhead of the present invention is U220 set hammer head, it is T font that its scope of attack is comprised of horizontal block and vertical piece, one of them scope of attack is the wide scope of attack, another scope of attack is the narrow scope of attack, the length of the wide scope of attack is 600mm, and the length of the narrow scope of attack is 200mm.
Background technology:
Machine is forged when forging flat steel in footpath, adopt a kind of tup-band steel tup (code name is that F70 specification is that 850mm(is long) * 600mm(wide) * 325mm(is high), G120 specification is that 850mm(is long) * 600mm(is wide) * 325mm(is high), forging raw material upper limit specification is Φ 650mm, the band steel upper limit specification of becoming a useful person: 420mm * 70 mm, thick wide maximum rate: 1: 6, this raw material specification has certain limitation, the steel ingot that steel mill is forged machine for footpath has three kinds, wherein 8.4t, 5.8t be in blooming mill cogging, opens to suitable dimension and send footpath forging machine to forge; Another kind of steel ingot is 6t billet (major part Φ 730mm, microcephaly Φ 600mm), if adopt band steel tup forging flat steel, raw material specification is greater than the maximum opening degree of tup, must forge to suitable dimension through the cogging of round steel tup, the band steel tup to be replaced such as melt down and again forge.In changing the process of tup (changing minimum 2 hours of tup), again melt down and not only waste coal gas, increase cost, and affect manufacturing schedule.
Summary of the invention:
In order to realize one-heating forming, the energy that avoids waste, the present invention proposes a kind of method of utilizing universal hammerhead forging flat steel.
Technical scheme of the present invention is: select universal hammerhead U220(maximum opening degree Φ 750) forge, the monolateral 30-45mm of drafts, 180 times/min of high frequency, forging force are that 450-500t and 90 times/min of low frequency, forging force are 800-900t, after Heating Steel Ingots is 1170 ± 50 ℃ to temperature, by footpath, forge machine and first adopt monolateral drafts 40-45mm, 180 times/min of the frequency carries out cogging, through after the depressing of three passages, blank is swaged into the waste circle of Φ 440mm, 45 ℃ of machine jaw rotations are forged in footpath, enforcement band steel forges, while forging from A car toward B car, utilize R group (1#, 3#) tup (the monolateral 30-40mm of drafts, 90 times/min of the frequency) forge, L group (2#, 4#) carry out shaping (the monolateral 3-5mm of drafts, 90 times/min of the frequency), while forging from B car toward A car, utilize L group tup (the monolateral 30-40mm of drafts, 90 times/min of the frequency) forge, R group is carried out shaping (the monolateral 3-5mm of drafts, 90 times/min of the frequency), in whole forging process, utilize wide (470mm) of tup to depress forging always, leptoprosopy carries out shaping (210mm).
The present invention forges by this depressing, and has both avoided delaying production because changing tup, has guaranteed again one-heating forming, and has guaranteed forging finished product surface quality.
Adopt universal hammerhead, avoided because ingot shape does not mate with tup, raw material secondary melts down, and reduces tup and changes, affects manufacturing schedule, increases process cost.
The specific embodiment
The present embodiment is implemented in forging operation area, Taiyuan Iron and Steel Co. section bar factory footpath.
Test steel grade is 20CrMo, ingot shape: 6 tons (billet, steel ingot appearance and size: large area of bed 730mm, microcephaly's size 600mm, ingot height degree 2150mm, cap open height 200mm), forging equipment is that machine is forged in 1800 tons of footpaths, forges specification 341mm * 303mm band steel.Adopt universal hammerhead U220 to forge, tup size 850mm(is long) * 600mm(is wide) * 250mm(is high), wide 600mm, leptoprosopy 200mm.
Concrete implementing process method: the red steel of electric furnace smelting steel ingot (6 tons 10) send chamber-type heating furnace to quickly heat up to 1170 ± 50 ℃, be incubated after 2 hours, first adopt monolateral drafts 40-45mm, 180 times/min of the frequency carries out cogging, through after the depressing of three passages, blank is swaged into the waste circle of Φ 440mm, 45 ℃ of machine jaw rotations are forged in footpath, enforcement band steel forges, reduce drafts, control range, it is 90 times/min that tup reduces the forging frequency, while forging from A car toward B car, the monolateral drafts 30-40mm of R group tup, forging force 800-900t, the monolateral drafts 3-5mm of L group tup, forging force 150-200t, while forging from B car toward A car, the monolateral drafts 30-40mm of L group tup, forging force 800-900t, the monolateral drafts 3-5mm of R group tup, forging force 150-200t, last passage, adopt monolateral drafts 2-5mm, forging force 100-150t, final forging temperature >=850 ℃, to becoming a useful person, shaping is carried out on four limits, the assurance surface quality of becoming a useful person.
By the enforcement to above process for forging, it is good that 20CrMo forges material surface, successful, and quality further gets a promotion, and forging first-time qualification rate is 100%.
Described famine circle refers to does not have the final bar being shaped, and belongs to intermediate blank;
Described A, B car refer to that footpath forging machine has two manipulators, and wherein A car refers to footpath forging machine material loading manipulator, and B car refers to footpath forging machine blanking manipulator;
R, L group tup refers to that footpath forging machine has 4 tups, and wherein two symmetrical tups become one group, and its code name is respectively R, L.
Claims (1)
1. a method of utilizing universal hammerhead forging flat steel, it is characterized in that red steel sends into chamber-type heating furnace and quickly heat up to 1170 ± 50 ℃, be incubated after 2 hours, first adopt monolateral drafts 40-45mm, 180 times/min of the frequency carries out cogging, through after the depressing of three passages, blank is swaged into the waste circle of Φ 440mm, 45 ℃ of machine jaw rotations are forged in footpath, enforcement band steel forges, reduce drafts, it is 90 times/min that tup forges the frequency, while forging from A car toward B car, the monolateral drafts 30-40mm of R group tup, forging force 800-900t, the monolateral drafts 3-5mm of L group tup, forging force 150-200t, while forging from B car toward A car, the monolateral drafts 30-40mm of L group tup, forging force 800-900t, the monolateral drafts 3-5mm of R group tup, forging force 150-200t, last passage, adopt monolateral drafts 2-5mm, forging force 100-150t, final forging temperature >=850 ℃, to becoming a useful person, shaping is carried out on four limits, described A car refers to footpath forging machine material loading manipulator, and B car refers to footpath forging machine blanking manipulator, R group, L group tup refer to that footpath forging machine has 4 tups, and wherein two symmetrical tups become one group, and its code name is respectively R, L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210039403.8A CN102581187B (en) | 2012-02-21 | 2012-02-21 | Method for forging flat steel by using universal hammerhead |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210039403.8A CN102581187B (en) | 2012-02-21 | 2012-02-21 | Method for forging flat steel by using universal hammerhead |
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| CN102581187A CN102581187A (en) | 2012-07-18 |
| CN102581187B true CN102581187B (en) | 2014-01-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308054A (en) * | 2014-10-05 | 2015-01-28 | 山西太钢不锈钢股份有限公司 | Method for forging square-flat steel |
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| CN105033131B (en) * | 2015-06-26 | 2017-05-03 | 中钢集团邢台机械轧辊有限公司 | Die steel corner forging process |
| CN106378404B (en) * | 2016-11-28 | 2017-12-26 | 山西太钢不锈钢股份有限公司 | A kind of method of GFM1800 tons diameter forging machine forging |
| CN108555202B (en) * | 2018-04-10 | 2019-09-13 | 抚顺特殊钢股份有限公司 | A kind of manufacturing method of diameter forging machine production nuclear leve driving mechanism insertion pin flat bar |
| CN109465602B (en) * | 2018-11-26 | 2020-08-25 | 抚顺特殊钢股份有限公司 | Manufacturing method of rolled material for positioning pin of U-shaped embedded part in nuclear-grade reactor |
| CN111151693B (en) * | 2020-01-21 | 2022-02-22 | 建龙北满特殊钢有限责任公司 | Forming method for forging fillet square steel by precision forging machine |
| CN112496223B (en) * | 2020-11-21 | 2021-09-07 | 江苏标新工业有限公司 | Radial forging method for short blank |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3784977B2 (en) * | 1998-12-28 | 2006-06-14 | 古河スカイ株式会社 | Manufacturing method of forged product rotating body |
| AT408852B (en) * | 2000-06-23 | 2002-03-25 | Gfm Beteiligungs & Man Gmbh | METHOD FOR FORGING A METAL WORKPIECE |
| CN1898046B (en) * | 2003-12-22 | 2010-12-08 | 本田技研工业株式会社 | Method of forming member |
| JP2007136487A (en) * | 2005-11-16 | 2007-06-07 | Sumitomo Metal Ind Ltd | Method of hot forging |
| CN101693980B (en) * | 2009-09-30 | 2011-06-01 | 山西太钢不锈钢股份有限公司 | Flat steel and manufacture method thereof |
| CN102294425B (en) * | 2011-08-22 | 2013-12-25 | 中原特钢股份有限公司 | Forging device and forging method for upper wide anvil and lower narrow anvil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104308054A (en) * | 2014-10-05 | 2015-01-28 | 山西太钢不锈钢股份有限公司 | Method for forging square-flat steel |
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