CN104384430A - Forging technology for thick-walled high cylindrical ring forgings - Google Patents
Forging technology for thick-walled high cylindrical ring forgings Download PDFInfo
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- CN104384430A CN104384430A CN201410684020.5A CN201410684020A CN104384430A CN 104384430 A CN104384430 A CN 104384430A CN 201410684020 A CN201410684020 A CN 201410684020A CN 104384430 A CN104384430 A CN 104384430A
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Abstract
The invention discloses a forging technology for thick-walled high cylindrical ring forgings. The steel number of a material is 13CrMo4-5, and the forging technology includes the steps: 1) pouring and horizontally placing steel billets obtained by blanking into a heating furnace for heating; 2) performing chamfering and rounding for the heated steel billets on an oil press and then heading the steel billets on the oil press; 3) punching through holes in the headed steel billets on the oil press to obtain initial billets; 4) drawing out the initial billets sleeving mandrels on the oil press by the aid of an upper anvil and a lower V-shaped anvil; 5) performing ring rolling for the drawn initial billets on a ring rolling mill by the aid of a cylindrical main roller and a cylindrical core roller to obtain the manufactured thick-walled high cylindrical ring forgings with needed sizes. The forging technology for the thick-walled high cylindrical ring forgings can rapidly and accurately machine the thick-walled high cylindrical ring forgings.
Description
Technical field
The present invention relates to the Forging Technology of heavy wall high tubular ring forging.
Background technology
Usually wall thickness is greater than 70mm, the tall and big ring forging in 1.5m of cylinder is called heavy wall high tubular ring forging.
The conventional production process of common ring forging is: with base steel for raw material, after, punching thick through blanking, pier, then on machine for rolling ring, rolles over ring by core roller and king roller obtain; But aforementioned production method cannot for the manufacture of heavy wall high tubular ring forging, reason is as follows: can increase ring forging height by expanding internal diameter when 1, less compared with large diameter to the shorter external diameter of length base steel carries out rolling ring, but because the rolling of heavy wall high tubular ring forging is than little, the internal diameter of ring forging is expanded cannot be synchronous with the increase of ring forging height, causes heavy wall high tubular ring forging cannot be completely shaping.2, when adopting the base steel be close with the profile of heavy wall high tubular ring forging to forge, because the length of hydraulic press upper punch is restricted, so cannot to base steel drift through hole, base steel also just cannot carry out rolling ring on machine for rolling ring.
Summary of the invention
Technical problem to be solved by this invention is: will provide a kind of Forging Technology of heavy wall high tubular ring forging.
In order to solve the problem, the technical solution used in the present invention is: the Forging Technology of heavy wall high tubular ring forging, and the grade of steel of material therefor is: 13CrMo4-5, and its forging step is as follows:
1) blanking gained steel billet is lain against in heating furnace, the highest furnace temperature≤600 DEG C now in stove, then 2 ~ 4h is incubated after heating furnace is warming up to 850 DEG C ± 20 DEG C, after being warming up to 1250 DEG C ± 20 DEG C be again incubated 6 ~ 8h, this heat up and insulating process in ensure steel billet in stove total heat time >=12h;
2) utilize hydraulic press to carry out chamfered edge on the steel billet after heating round as a ball, and then it is thick to utilize hydraulic press to carry out pier to steel billet, pier slightly than >=2.3, then pier is thick after steel billet return stove insulation 1 ~ 2h, holding temperature is 1200 DEG C ~ 1300 DEG C;
3) obtained just base after the steel billet after pier is thick utilizes hydraulic press to carry out rushing through hole, then first base is returned stove insulation 1 ~ 2h, holding temperature is 1200 DEG C ~ 1300 DEG C;
4) on hydraulic press, use anvil, lower V-type anvil pulls out the first base be sleeved on mandrel, wherein before pulling, mandrel need be preheated to 150 DEG C ~ 250 DEG C and smear lubricant, in the process of pulling, each one side drafts of upper anvil is 30 ~ 60mm, pulling is than >=2.0, first base after completing pulling operation is returned stove insulation 1 ~ 2h, and holding temperature is 1200 DEG C ~ 1300 DEG C;
5) on machine for rolling ring, use column type king roller and cylinder core roller to carry out rolling ring to the first base after pulling, finally the heavy wall high tubular ring forging of obtained required size, wherein rolles over chain rate >=2.0.
Further, the Forging Technology of aforesaid heavy wall high tubular ring forging, wherein: lubricant is the mixture that carbon dust and machine tool lubrication oil mix with mass ratio 1 ~ 1.5:2 ~ 2.5 ratio, and preferred proportion is 1:2.
Further, the Forging Technology of aforesaid heavy wall high tubular ring forging, wherein: in pulling process, the distance of first base and the mandrel shaft shoulder is 100 ~ 150mm.
Further, the Forging Technology of aforesaid heavy wall high tubular ring forging, wherein: in pulling operation, the pressing order of upper anvil to the axial each position of first base is: first press the first base front portion near the mandrel shaft shoulder, pressing width is the thickness of upper anvil, then successively presses the section of pressing from back to front from first base rear portion.
Further, the Forging Technology of aforesaid heavy wall high tubular ring forging, wherein: described upper anvil is upper flat anvil.
Further, the Forging Technology of aforesaid heavy wall high tubular ring forging, wherein: described upper anvil is upper reverse V-shaped anvil.
Advantage of the present invention is: the Forging Technology of heavy wall high tubular ring forging provided by the invention, can process heavy wall high tubular ring forging quickly and accurately.
Accompanying drawing explanation
Fig. 1 is the theory structure schematic diagram pulling out operation in the Forging Technology of heavy wall high tubular ring forging of the present invention.
Fig. 2 is the structural representation of the right apparent direction of Fig. 1.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the present invention is described in further detail.
Embodiment 1
The Forging Technology of heavy wall high tubular ring forging, the grade of steel of material therefor is: 13CrMo4-5, and its forging step is as follows:
1) on cutting machine, blanking is carried out to hexagonal steel bar, then blanking gained steel billet is lain against in heating furnace, the highest furnace temperature≤600 DEG C now in stove, then heating furnace is incubated 2h after being warming up to 850 DEG C, be incubated 6h after being warming up to 1250 DEG C again, heat up at this and ensure that the total heat time of steel billet in stove is 13h in insulating process;
2) utilize hydraulic press to carry out chamfered edge on the steel billet after heating round as a ball, and then it is thick to utilize hydraulic press to carry out pier to steel billet, pier slightly than being 3.3, then pier is thick after steel billet return stove insulation 1h, holding temperature is 1300 DEG C;
3) obtained first base 4 as shown in Figure 1 after the steel billet after pier is thick carries out rushing through hole on hydraulic press, then first base 4 is returned stove insulation 1h, holding temperature is 1300 DEG C;
4) as Fig. 1, shown in Fig. 2, flat anvil 1 on hydraulic press uses, lower V-type anvil 2 pulls out the first base 4 be sleeved on mandrel 3, in actual production, upper anvil also can use reverse V-shaped anvil, region for pulling out on mandrel 3 is column type, the step of pulling is as follows: first mandrel 3 be preheated to 150 DEG C before pulling out and smear lubricant, lubricant is the mixture that carbon dust and machine tool lubrication oil (Mobil Weida guide track series oil) mix with mass ratio 1.2:2.3 ratio, then mandrel 3 is fixed by manipulator and is parallel to ground, again first base 4 is set on mandrel 3, then mandrel 3 and first base 4 are moved between upper flat anvil 1 and lower V-type anvil 2, and just the outer surface of base 4 contacts with upper flat anvil 1 and lower V-type anvil 2, the surface of just base 4 is pressed by upper flat anvil 1, make just base 4 plastic deformation and being pulled out between upper flat anvil 1 and lower V-type anvil 2, the pulling of first base 4 be upper flat anvil 1 with a less one side drafts to first base 4 outer surface circulation repeatedly pressing come, the detailed process repeatedly pressed is as follows: first go up flat anvil 1 and press first base 4 front portion near the mandrel shaft shoulder 31 with the one side drafts of each about 30mm, pressing width is the thickness of upper flat anvil 1, then go up flat anvil 1 successively to press the section of pressing from back to front from first base 4 rear portion with the one side drafts of each about 30mm again, after completing time pressing of the above-mentioned single pass to first base 4, base 4 at the beginning of mandrel 3 drives rotates a less angle, then go up flat anvil 1 and again a single pass time pressing is carried out to first base 4 according to above-mentioned one side drafts and pressing order, so constantly repetitive cycling is until first base 4 is pulled out to Len req, in the process of pulling, upper flat anvil 1 needs successively to press the diverse location on first base 4 axial surface, so mandrel 3 needs axial feeding to make just base 4 to move axially, each feed of mandrel 3 is determined according to the thickness of upper flat anvil 1, and just base 4 remains on 100mm with the distance of the mandrel shaft shoulder 31 in pulling process, pull out than being 3.0.After completing pulling process, the first base 4 after pulling is returned stove insulation 1h, holding temperature is 1300 DEG C;
5) on machine for rolling ring, use column type king roller and cylinder core roller to carry out rolling ring to the first base 4 after pulling, finally the heavy wall high tubular ring forging of obtained required size, wherein rolling over chain rate is 3.0.
Embodiment 2
The Forging Technology of heavy wall high tubular ring forging, the grade of steel of material therefor is: 13CrMo4-5, and its forging step is as follows:
1) on cutting machine, blanking is carried out to hexagonal steel bar, then blanking gained steel billet is lain against in heating furnace, the highest furnace temperature≤600 DEG C now in stove, then heating furnace is incubated 3h after being warming up to 870 DEG C, be incubated 7h after being warming up to 1270 DEG C again, heat up at this and ensure that the total heat time of steel billet in stove is 15h in insulating process;
2) utilize hydraulic press to carry out chamfered edge on the steel billet after heating round as a ball, and then it is thick to utilize hydraulic press to carry out pier to steel billet, pier slightly than being 2.3, then pier is thick after steel billet return stove insulation 1.2h, holding temperature is 1250 DEG C;
3) obtained first base 4 as shown in Figure 1 after the steel billet after pier is thick carries out rushing through hole on hydraulic press, then first base 4 is returned stove insulation 1.2h, holding temperature is 1250 DEG C;
4) as Fig. 1, shown in Fig. 2, flat anvil 1 on hydraulic press uses, lower V-type anvil 2 pulls out the first base 4 be sleeved on mandrel 3, in actual production, upper anvil also can use reverse V-shaped anvil, region for pulling out on mandrel 3 is column type, the step of pulling is as follows: first mandrel 3 be preheated to 200 DEG C before pulling out and smear lubricant, lubricant is the mixture that carbon dust and machine tool lubrication oil (Haas is No. 68 rail oils too) mix with mass ratio 1:2 ratio, then mandrel 3 is fixed by manipulator and is parallel to ground, again first base 4 is set on mandrel 3, then mandrel 3 and first base 4 are moved between upper flat anvil 1 and lower V-type anvil 2, and just the outer surface of base 4 contacts with upper flat anvil 1 and lower V-type anvil 2, the surface of just base 4 is pressed by upper flat anvil 1, make just base 4 plastic deformation and being pulled out between upper flat anvil 1 and lower V-type anvil 2, the pulling of first base 4 be upper flat anvil 1 with a less one side drafts to first base 4 outer surface circulation repeatedly pressing come, the detailed process repeatedly pressed is as follows: first go up flat anvil 1 and press first base 4 front portion near the mandrel shaft shoulder 31 with the one side drafts of each about 45mm, pressing width is the thickness of upper flat anvil 1, then go up flat anvil 1 successively to press the section of pressing from back to front from first base 4 rear portion with the one side drafts of each about 45mm again, after completing time pressing of the above-mentioned single pass to first base 4, base 4 at the beginning of mandrel 3 drives rotates a less angle, then go up flat anvil 1 and again a single pass time pressing is carried out to first base 4 according to above-mentioned one side drafts and pressing order, so constantly repetitive cycling is until first base 4 is pulled out to Len req, in the process of pulling, upper flat anvil 1 needs successively to press the diverse location on first base 4 axial surface, so mandrel 3 needs axial feeding to make just base 4 to move axially, each feed of mandrel 3 is determined according to the thickness of upper flat anvil 1, and just base 4 remains on 125mm with the distance of the mandrel shaft shoulder 31 in pulling process, pull out than being 2.0.After completing pulling process, the first base 4 after pulling is returned stove insulation 1.2h, holding temperature is 1250 DEG C;
5) on machine for rolling ring, use column type king roller and cylinder core roller to carry out rolling ring to the first base 4 after pulling, finally the heavy wall high tubular ring forging of obtained required size, wherein rolling over chain rate is 2.0.
Embodiment 3
The Forging Technology of heavy wall high tubular ring forging, the grade of steel of material therefor is: 13CrMo4-5, and its forging step is as follows:
1) on cutting machine, blanking is carried out to hexagonal steel bar, then blanking gained steel billet is lain against in heating furnace, the highest furnace temperature≤600 DEG C now in stove, then heating furnace is incubated 4h after being warming up to 860 DEG C, be incubated 6h after being warming up to 1260 DEG C again, heat up at this and ensure that the total heat time of steel billet in stove is 16h in insulating process;
2) utilize hydraulic press to carry out chamfered edge on the steel billet after heating round as a ball, and then it is thick to utilize hydraulic press to carry out pier to steel billet, pier slightly than being 4.3, then pier is thick after steel billet return stove insulation 1.5h, holding temperature is 1200 DEG C;
3) obtained first base 4 as shown in Figure 1 after the steel billet after pier is thick carries out rushing through hole on hydraulic press, then first base 4 is returned stove insulation 1.5h, holding temperature is 1200 DEG C;
4) as Fig. 1, shown in Fig. 2, flat anvil 1 on hydraulic press uses, lower V-type anvil 2 pulls out the first base 4 be sleeved on mandrel 3, in actual production, upper anvil also can use reverse V-shaped anvil, region for pulling out on mandrel 3 is column type, the step of pulling is as follows: first mandrel 3 be preheated to 250 DEG C before pulling out and smear lubricant, lubricant is the mixture that carbon dust and machine tool lubrication oil (Great Wall L-HG32 hydraulic guide rail oil) mix with mass ratio 1.5:2.5 ratio, then mandrel 3 is fixed by manipulator and is parallel to ground, again first base 4 is set on mandrel 3, then mandrel 3 and first base 4 are moved between upper flat anvil 1 and lower V-type anvil 2, and just the outer surface of base 4 contacts with upper flat anvil 1 and lower V-type anvil 2, the surface of just base 4 is pressed by upper flat anvil 1, make just base 4 plastic deformation and being pulled out between upper flat anvil 1 and lower V-type anvil 2, the pulling of first base 4 be upper flat anvil 1 with a less one side drafts to first base 4 outer surface circulation repeatedly pressing come, the detailed process repeatedly pressed is as follows: first go up flat anvil 1 and press first base 4 front portion near the mandrel shaft shoulder 31 with the one side drafts of each about 60mm, pressing width is the thickness of upper flat anvil 1, then go up flat anvil 1 successively to press the section of pressing from back to front from first base 4 rear portion with the one side drafts of each about 60mm again, after completing time pressing of the above-mentioned single pass to first base 4, base 4 at the beginning of mandrel 3 drives rotates a less angle, then go up flat anvil 1 and again a single pass time pressing is carried out to first base 4 according to above-mentioned one side drafts and pressing order, so constantly repetitive cycling is until first base 4 is pulled out to Len req, in the process of pulling, upper flat anvil 1 needs successively to press the diverse location on first base 4 axial surface, so mandrel 3 needs axial feeding to make just base 4 to move axially, each feed of mandrel 3 is determined according to the thickness of upper flat anvil 1, and just base 4 remains on 150mm with the distance of the mandrel shaft shoulder 31 in pulling process, pull out than being 4.0.After completing pulling process, the first base 4 after pulling is returned stove insulation 1.5h, holding temperature is 1200 DEG C;
5) on machine for rolling ring, use column type king roller and cylinder core roller to carry out rolling ring to the first base 4 after pulling, finally the heavy wall high tubular ring forging of obtained required size, wherein rolling over chain rate is 4.0.
Beneficial effect of the present invention is: in technique of the present invention, steel billet lies against in heating furnace, can prevent steel billet burning like this, make homogeneous heating, is conducive to follow-up forging; After pier is thick, first first base is pulled out, the profile of the profile of first base and required heavy wall high tubular ring forging can be made close, the shaping of heavy wall high tubular ring forging when being conducive to like this rolling over ring, and before pulling, on mandrel, smear lubricant, at the beginning of when can reduce pulling, the frictional resistance of base and mandrel, makes pulling more smoothly; During pulling, the distance of restriction just between base and the mandrel shaft shoulder, after can making just base pulling, just the mandrel shaft shoulder is not encountered in base front portion, and can prevent because distance between first base and the mandrel shaft shoulder is excessive and cause mandrel in pulling process, produce excessive amount of deflection, the excessive amount of deflection of mandrel can make the pulling poor effect of just base; Each one side drafts is limited, the circularity of steel billet after pulling can be made better, be conducive to the carrying out of next rolling over ring; Upper anvil first presses the front and rear portions of first base respectively, the steel material of just base two end surfaces can be made first to be compacted, when being pressed in the middle part of base originally, the steel material that the steel material of first base middle part surface can be compacted with both sides fully extrudes, steel billet so just can be made to be forged, thus reach the object of interior tissue in the first base of refinement.In sum, the Forging Technology of heavy wall high tubular ring forging provided by the invention, can process heavy wall high tubular ring forging quickly and accurately.
Claims (7)
1. the Forging Technology of heavy wall high tubular ring forging, the grade of steel of material therefor is: 13CrMo4-5, is characterized in that: its forging step is as follows:
(1) blanking gained steel billet is lain against in heating furnace, the highest furnace temperature≤600 DEG C now in stove, then 2 ~ 4h is incubated after heating furnace is warming up to 850 DEG C ± 20 DEG C, after being warming up to 1250 DEG C ± 20 DEG C be again incubated 6 ~ 8h, this heat up and insulating process in ensure steel billet in stove total heat time >=12h;
(2) utilize hydraulic press to carry out chamfered edge on the steel billet after heating round as a ball, and then it is thick to utilize hydraulic press to carry out pier to steel billet, pier slightly than >=2.3, then pier is thick after steel billet return stove insulation 1 ~ 2h, holding temperature is 1200 DEG C ~ 1300 DEG C;
(3) obtained just base after the steel billet after pier is thick utilizes and hydraulic press carries out rushing through hole, then first base is returned stove insulation 1 ~ 2h, holding temperature is 1200 DEG C ~ 1300 DEG C;
(4) on hydraulic press, use anvil, lower V-type anvil pulls out the first base be sleeved on mandrel, wherein before pulling, mandrel need be preheated to 150 DEG C ~ 250 DEG C and smear lubricant, in the process of pulling, each one side drafts of upper anvil is 30 ~ 60mm, pulling is than >=2.0, first base after completing pulling operation is returned stove insulation 1 ~ 2h, and holding temperature is 1200 DEG C ~ 1300 DEG C;
(5) on machine for rolling ring, use column type king roller and cylinder core roller to carry out rolling ring to the first base after pulling, finally the heavy wall high tubular ring forging of obtained required size, wherein rolles over chain rate >=2.0.
2. the Forging Technology of heavy wall high tubular ring forging according to claim 1, is characterized in that: lubricant is the mixture that carbon dust and machine tool lubrication oil mix with mass ratio 1 ~ 1.5:2 ~ 2.5 ratio.
3. the Forging Technology of heavy wall high tubular ring forging according to claim 2, is characterized in that: lubricant is the mixture that carbon dust and machine tool lubrication oil mix with mass ratio 1:2 ratio.
4. the Forging Technology of heavy wall high tubular ring forging according to claim 1 and 2, is characterized in that: in pulling process, and the distance of first base and the mandrel shaft shoulder is 100 ~ 150mm.
5. the Forging Technology of heavy wall high tubular ring forging according to claim 1 and 2, it is characterized in that: in pulling operation, the pressing order of upper anvil to the axial each position of first base is: first press the first base front portion near the mandrel shaft shoulder, pressing width is the thickness of upper anvil, then successively presses the section of pressing from back to front from first base rear portion.
6. the Forging Technology of heavy wall high tubular ring forging according to claim 1 and 2, is characterized in that: described upper anvil is upper flat anvil.
7. the Forging Technology of heavy wall high tubular ring forging according to claim 1 and 2, is characterized in that: described upper anvil is upper reverse V-shaped anvil.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964738A (en) * | 2017-04-18 | 2017-07-21 | 成都乔依赛斯石油科技有限公司 | Heavy oil tank production stopping device |
| CN108941404A (en) * | 2018-09-30 | 2018-12-07 | 中冶陕压重工设备有限公司 | A kind of free forging method of conically shaped platform forging |
| CN108994249A (en) * | 2018-07-16 | 2018-12-14 | 兰州兰石能源装备工程研究院有限公司 | Large-scale cylindrical forged piece forges Rolling compund production technology |
| CN109127973A (en) * | 2017-09-29 | 2019-01-04 | 贵州安大航空锻造有限责任公司 | Cr13 type martensitic stain less steel heavy wall height cylinder ring forging forming method |
| CN111745120A (en) * | 2020-06-23 | 2020-10-09 | 河南中原特钢装备制造有限公司 | Forging method of wind tunnel cannon driving section pipe body |
| CN112496219A (en) * | 2020-11-23 | 2021-03-16 | 苏州市吴中不锈钢有限公司 | Manufacturing and processing method of 4J32 alloy ring piece |
| CN112548009A (en) * | 2020-11-19 | 2021-03-26 | 陕西三原正泰锻压有限公司 | Forging and pressing equipment and forging and pressing process thereof |
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| CN102773398A (en) * | 2011-05-09 | 2012-11-14 | 上海重型机器厂有限公司 | Method for forging slender and thick-walled pipe fittings |
| CN103111562A (en) * | 2013-03-15 | 2013-05-22 | 中航卓越锻造（无锡）有限公司 | Manufacturing method of thick-wall high-drum annular forging |
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| JPH01224134A (en) * | 1988-03-04 | 1989-09-07 | Ishikawajima Harima Heavy Ind Co Ltd | Ring manufacturing device |
| JP2001129635A (en) * | 1999-11-02 | 2001-05-15 | Nsk Warner Kk | Method of manufacturing deformed ring |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106964738A (en) * | 2017-04-18 | 2017-07-21 | 成都乔依赛斯石油科技有限公司 | Heavy oil tank production stopping device |
| CN106964738B (en) * | 2017-04-18 | 2019-01-22 | 四川行之智汇知识产权运营有限公司 | Stopping device is used in heavy oil tank production |
| CN109127973A (en) * | 2017-09-29 | 2019-01-04 | 贵州安大航空锻造有限责任公司 | Cr13 type martensitic stain less steel heavy wall height cylinder ring forging forming method |
| CN108994249A (en) * | 2018-07-16 | 2018-12-14 | 兰州兰石能源装备工程研究院有限公司 | Large-scale cylindrical forged piece forges Rolling compund production technology |
| CN108941404A (en) * | 2018-09-30 | 2018-12-07 | 中冶陕压重工设备有限公司 | A kind of free forging method of conically shaped platform forging |
| CN111745120A (en) * | 2020-06-23 | 2020-10-09 | 河南中原特钢装备制造有限公司 | Forging method of wind tunnel cannon driving section pipe body |
| CN111745120B (en) * | 2020-06-23 | 2021-08-13 | 河南中原特钢装备制造有限公司 | Forging method of wind tunnel cannon driving section pipe body |
| CN112548009A (en) * | 2020-11-19 | 2021-03-26 | 陕西三原正泰锻压有限公司 | Forging and pressing equipment and forging and pressing process thereof |
| CN112548009B (en) * | 2020-11-19 | 2022-11-29 | 陕西三原正泰锻压有限公司 | Forging and pressing equipment and forging and pressing process thereof |
| CN112496219A (en) * | 2020-11-23 | 2021-03-16 | 苏州市吴中不锈钢有限公司 | Manufacturing and processing method of 4J32 alloy ring piece |
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|---|---|
| CN104384430B (en) | 2016-06-22 |
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