CN104128542A - Machining method for forming flange on large-diameter-difference single flange shaft at first - Google Patents
Machining method for forming flange on large-diameter-difference single flange shaft at first Download PDFInfo
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- CN104128542A CN104128542A CN201410185339.3A CN201410185339A CN104128542A CN 104128542 A CN104128542 A CN 104128542A CN 201410185339 A CN201410185339 A CN 201410185339A CN 104128542 A CN104128542 A CN 104128542A
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Abstract
The invention discloses a machining method for forming a flange on a large-diameter-difference signal flange shaft at first. The machining method comprises the following steps of feeding; first fire heating: preheating a mold and drawing out the whole body of a blank; second fire heating; third fire heating; fourth fire heating; fifth fire heating: heating the blank until the temperature of the blank reaches 1240 DEG C by using a heating furnace, insulating the blank for 13 hours, and placing one end of the blank in a countersunk head mold to form a flange after the blank is discharged from the furnace; sixth fire heating: locally heating the blank with the formed flange in the heating furnace under the conditions that the flange is placed out of the furnace, a shaft is placed in the furnace and the heating temperature in the furnace is 1200 DEG C, and drawing out a shaft body and performing finishing forming on the shaft body after the shaft is insulated for 4 hours; and heat treatment after forging: normalizing, tempering and hardening the product sequentially. By locally heating the blank, grains of the flange are not thick, and the problems that the head of the flange is over large, and the flange is not suitable to be heated in the furnace are solved.
Description
Technical field
The present invention relates to be first the shaped processing method of flange of a kind of diameter difference list flange shaft.
Background technology
During former open die forging is produced, the poor little single flange shaft of diameter is general to be adopted when forging axle class part, while reaching after forging ratio ejection moulding, with the ejection that is as the criterion of flange end diameter, then number prints sub-material, and small end is pulled out; And the poor large single flange shaft of diameter is generally considered shaping factor, select first to pull out axle body, after enter the method for mold forming flange.
And within the scope of the production capacity at 6300T hydraulic press, be below the heavy 35T of high-effect land and sea breeze electricity main shaft blank below 3MW, by the method for countersunk head mould molding flange pulling axle body, four fire can finish substantially; Last two fire are first to pull out axle body, with maximum gauge ￠ 1500 shove charges (size of burner hearth 2350mm*3200mm*8000mm), be incubated about 2 hours, progressive die shaped flange, finishing axle body, but, for the heavy 64T of 4MW offshore wind farm main shaft blank, reach the upper limit of press and corollary equipment ability, in order to forge, crystal grain thinning, make even tissue, the operating process of whole forging all can lower efficiency, and fire time can be directly double; And cannot forge according to the method that first pulls out in the past aftershaping flange, because deformation process axle body is long, exceed the stroke 4700mm of press.So, can only pull out again axle body by first shaped flange, and in type flange shape does not in the end allow there is large deformation in a fire again, again because still need soak at least 4 hours before last fire, if and flange is after high-temperature heating crystal grain can be grown up, will cause occurring coarse grains less than suitable distortion again, organize bad, performance inconsistency lattice etc. directly to affect the problem of product quality; And the compact dimensions of flange will be more than or equal to furnace height 2350mm.
Summary of the invention
The object of the invention is to overcome the defect existing in prior art, provide one can not only preventive treatment blue grain growth, and be first the shaped processing method of flange of the diameter difference list flange shaft that can solve the excessive problem that can not put into heating furnace of flange outer diameter.
For achieving the above object, technical scheme of the present invention has been to provide be first the shaped processing method of flange of a kind of diameter difference list flange shaft, and this processing method comprises the following steps:
S1: blanking: blank is carried out to pretreatment;
S2: the first fire time heating: mould and die preheating and to blank the whole body pulling;
S3: the second fire time heating: by blank heating to 1230 DEG C, be incubated 19 hours by heating furnace, after coming out of the stove, blank carried out pressing tongs handle, excises unnecessary rising head;
S4: the 3rd fire time heating: by blank heating to 1240 DEG C, be incubated 21 hours by heating furnace, after coming out of the stove to blank carry out large forging ratio pier thick, pull out;
S5: the 4th fire time heating: by blank heating to 1250 DEG C, be incubated 15 hours by heating furnace, after coming out of the stove, blank is carried out that large forging ratio pier is thick, pulling, number seal, pulls out bound feet;
S6: the 5th fire time heating: by blank heating to 1240 DEG C, be incubated 13 hours by heating furnace, after coming out of the stove, one end of blank inserted to countersunk head die for molding flange, alignment;
S7: the 6th fire time heating: by after flange forming blank put into heating furnace and carry out local heat, wherein flange is placed in outside stove, axle is placed in stove, in stove, heating-up temperature is 1200 DEG C, is incubated and after 4 hours, axle body is pulled out and finishing moulding;
S8: forge after-baking: comprise successively normalizing, tempering and modified.
As preferably, in step S1, blank is carried out to pretreatment and comprise and blank is carried out to chop at the mouth of a river, rising head trimming, then blank is inserted in heating furnace and heated, be incubated 1230 DEG C, after 13 hours, start to forge.
As preferably, 890 DEG C ± 10 DEG C insulations of normalizing 26 hours in step S8,660 DEG C ± 10 DEG C insulations of tempering 50 hours.
Advantage of the present invention and beneficial effect are: this local heat had both ensured that the crystal grain of flange was not thick, had solved again flange head excessive, the problem of unsuitable shove charge heating.
Detailed description of the invention
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
First the be shaped processing method of flange of diameter difference list flange shaft, this processing method comprises the following steps:
S1: blanking: blank is carried out to pretreatment;
S2: the first fire time heating: mould and die preheating and to blank the whole body pulling;
S3: the second fire time heating: by blank heating to 1230 DEG C, be incubated 19 hours by heating furnace, after coming out of the stove, blank carried out pressing tongs handle, excises unnecessary rising head;
S4: the 3rd fire time heating: by blank heating to 1240 DEG C, be incubated 21 hours by heating furnace, after coming out of the stove to blank carry out large forging ratio pier thick, pull out;
S5: the 4th fire time heating: by blank heating to 1250 DEG C, be incubated 15 hours by heating furnace, after coming out of the stove, blank is carried out that large forging ratio pier is thick, pulling, number seal, pulls out bound feet;
S6: the 5th fire time heating: by blank heating to 1240 DEG C, be incubated 13 hours by heating furnace, after coming out of the stove, one end of blank inserted to countersunk head die for molding flange, alignment;
S7: the 6th fire time heating: by after flange forming blank put into heating furnace and carry out local heat, wherein flange is placed in outside stove, axle is placed in stove, in stove, heating-up temperature is 1200 DEG C, is incubated and after 4 hours, axle body is pulled out and finishing moulding;
S8: forge after-baking: comprise successively normalizing, tempering and modified.
In step S1, blank is carried out to pretreatment and comprise and blank is carried out to chop at the mouth of a river, rising head trimming, then blank is inserted in heating furnace and heated, be incubated 1230 DEG C, after 13 hours, start to forge.
890 DEG C ± 10 DEG C insulations of normalizing 26 hours in step S8,660 DEG C ± 10 DEG C insulations of tempering 50 hours.
This local heat focuses on flange outside stove, axle body is in stove, fire door is that type semienclosed heating furnace fan main shaft carries out local heat, when fan main shaft normal heating, when temperature is 1200 DEG C of technological temperatures in stove, flange temperature only reaches 600-700 DEG C, do not reach the lowest temperature of this steel grade grain growth, can not only the preventive treatment blue grain growth of the method, and can solve the excessive problem that can not put into heating furnace of flange outer diameter, in addition be conducive to the limited press of stroke and realized the forging to 4MW blower fan main shaft, and innovate diameter difference list flange shaft Forging Technology.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. the diameter difference list flange shaft processing method for flange that is first shaped, is characterized in that: this processing method comprises the following steps:
S1: blanking: blank is carried out to pretreatment;
S2: the first fire time heating: mould and die preheating and to blank the whole body pulling;
S3: the second fire time heating: by blank heating to 1230 DEG C, be incubated 19 hours by heating furnace, after coming out of the stove, blank carried out pressing tongs handle, excises unnecessary rising head;
S4: the 3rd fire time heating: by blank heating to 1240 DEG C, be incubated 21 hours by heating furnace, after coming out of the stove to blank carry out large forging ratio pier thick, pull out;
S5: the 4th fire time heating: by blank heating to 1250 DEG C, be incubated 15 hours by heating furnace, after coming out of the stove, blank is carried out that large forging ratio pier is thick, pulling, number seal, pulls out bound feet;
S6: the 5th fire time heating: by blank heating to 1240 DEG C, be incubated 13 hours by heating furnace, after coming out of the stove, one end of blank inserted to countersunk head die for molding flange, alignment;
S7: the 6th fire time heating: by after flange forming blank put into heating furnace and carry out local heat, wherein flange is placed in outside stove, axle is placed in stove, in stove, heating-up temperature is 1200 DEG C, is incubated and after 4 hours, axle body is pulled out and finishing moulding;
S8: forge after-baking: comprise successively normalizing, tempering and modified.
2. the diameter difference list flange shaft as claimed in claim 1 processing method of flange that is first shaped, it is characterized in that: in step S1, blank is carried out to pretreatment and comprise and blank is carried out to chop at the mouth of a river, rising head trimming, then blank is inserted in heating furnace and heated, be incubated 1230 DEG C, after 13 hours, start to forge.
3. the diameter difference list flange shaft as claimed in claim 1 processing method of flange that is first shaped, is characterized in that: 890 DEG C ± 10 DEG C insulations of normalizing 26 hours in step S8,660 DEG C ± 10 DEG C insulations of tempering 50 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410185339.3A CN104128542B (en) | 2014-05-05 | 2014-05-05 | First the be shaped processing method of flange of diameter difference list flange shaft |
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| CN201410185339.3A CN104128542B (en) | 2014-05-05 | 2014-05-05 | First the be shaped processing method of flange of diameter difference list flange shaft |
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| CN104128542A true CN104128542A (en) | 2014-11-05 |
| CN104128542B CN104128542B (en) | 2016-05-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689628A (en) * | 2016-02-15 | 2016-06-22 | 江阴南工锻造有限公司 | Forging process for wind power main shaft made of 34CrNiMo6 steel |
| CN109261869A (en) * | 2018-09-19 | 2019-01-25 | 无锡继平锻造有限公司 | A kind of forging and heat treatment process of crossover flange forging |
| CN109513867A (en) * | 2018-12-20 | 2019-03-26 | 山东莱锻机械股份有限公司 | A kind of large-diameter makes tooling and forging method than end axis end large-flange tyre die |
| CN110227907A (en) * | 2019-06-03 | 2019-09-13 | 嘉兴市恒工精密机械有限公司 | A kind of processing method of high accurate speed reducer gland |
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| SU1006025A1 (en) * | 1981-03-11 | 1983-03-23 | Предприятие П/Я Р-6543 | Hot extrusion method |
| RU2419505C1 (en) * | 2009-10-05 | 2011-05-27 | Государственное образовательное учреждение высшего профессионального образования Московский государственный индустриальный университет | Method of producing rod-plus-flange forgings |
| CN102284669A (en) * | 2011-06-19 | 2011-12-21 | 江苏森威精锻有限公司 | Precise forming process of flange shaft |
| CN102699637A (en) * | 2012-06-26 | 2012-10-03 | 江苏金源锻造股份有限公司 | Process for forging main shaft flange of wind driven generator |
| CN102806291A (en) * | 2012-08-24 | 2012-12-05 | 江苏凌飞锻造有限公司 | Wind-powered main shaft forging method |
| KR101243436B1 (en) * | 2012-11-19 | 2013-03-13 | 삼양금속공업 주식회사 | Cuni 90/10 flange and its production method using forge |
| KR101280087B1 (en) * | 2012-11-19 | 2013-06-28 | 삼양금속공업 주식회사 | Cuni 90/10 flange and its production method using forge |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1006025A1 (en) * | 1981-03-11 | 1983-03-23 | Предприятие П/Я Р-6543 | Hot extrusion method |
| RU2419505C1 (en) * | 2009-10-05 | 2011-05-27 | Государственное образовательное учреждение высшего профессионального образования Московский государственный индустриальный университет | Method of producing rod-plus-flange forgings |
| CN102284669A (en) * | 2011-06-19 | 2011-12-21 | 江苏森威精锻有限公司 | Precise forming process of flange shaft |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689628A (en) * | 2016-02-15 | 2016-06-22 | 江阴南工锻造有限公司 | Forging process for wind power main shaft made of 34CrNiMo6 steel |
| CN109261869A (en) * | 2018-09-19 | 2019-01-25 | 无锡继平锻造有限公司 | A kind of forging and heat treatment process of crossover flange forging |
| CN109513867A (en) * | 2018-12-20 | 2019-03-26 | 山东莱锻机械股份有限公司 | A kind of large-diameter makes tooling and forging method than end axis end large-flange tyre die |
| CN110227907A (en) * | 2019-06-03 | 2019-09-13 | 嘉兴市恒工精密机械有限公司 | A kind of processing method of high accurate speed reducer gland |
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| CN104128542B (en) | 2016-05-04 |
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Effective date of registration: 20230810 Address after: No. 37 Hongtu Road, Guanshan Village, Nanzha Street, Jiangyin City, Wuxi City, Jiangsu Province, 214400 Patentee after: Jiangsu Jinfeng Haisheng Machinery Equipment Co.,Ltd. Address before: No. 15 Kaijin Road, Jinnan Industrial Park, Nanzha Street, Jiangyin City, Wuxi City, Jiangsu Province, 214400 Patentee before: JIANGYIN NANGONG FORGING Co.,Ltd. |
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