CN102615223A - Method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces - Google Patents
Method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces Download PDFInfo
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- CN102615223A CN102615223A CN2012100882686A CN201210088268A CN102615223A CN 102615223 A CN102615223 A CN 102615223A CN 2012100882686 A CN2012100882686 A CN 2012100882686A CN 201210088268 A CN201210088268 A CN 201210088268A CN 102615223 A CN102615223 A CN 102615223A
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Abstract
The invention relates to a method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces. The method comprises cutting a cylindrical billet into material sections; heating the material sections from room temperature to austenitizing temperature evenly and keeping warm; then heading, punching and chambering the material sections to be manufactured into ring piece blanks to be rolled and expanded; baking again and heating the obtained blanks to reach target temperature and keep warm; placing the obtained blanks into a hole mould of a ring rolling machine formed by an irregular-shaped driving roller and an irregular-shaped core roller to be rolled, expanded and formed; achieving the ring forge pieces which is narrow at two ends and wide in middle and with the axial height as twice as the height of a target trapezoid flange; cutting the ring forge pieces from the middle of the axial height, symmetrically dividing a work piece into two parts to obtain two trapezoid-cross-section flange ring forge pieces; and finally turning the forge pieces into end product flanges. The method for simultaneously rolling and expanding two trapezoid-cross-section flange ring forge pieces is high in production efficiency, energy-saving, environmental-friendly and capable of improving utilization rate of raw materials and quality of products.
Description
Technical field
The present invention relates to a kind of method of annular flange spare rolling forming, particularly a kind of method that expands two trapezoid cross section flange ring forging parts of rolling over simultaneously.
Background technology
Along with the progress and the expanding economy of science and technology, increasing to the demand of annular element especially large-sized annular spare in the commercial production, in some main equipment, annular element has become the critical component that influences performance indications.Extensive studies has been carried out to the production and the processing technology of annular element in countries in the world at present, and the annular element size range that can make constantly enlarges, and cross sectional shape is complicated more, and material is selected constantly to increase, and is also increasingly high to the manufacturing process requirement.
The traditional annular element especially production of large-sized annular spare such as wind power flange mainly adopts methods such as open die forging, whole die forging and saddle forging; It is that continuous local plastic shapes technology that ring is rolled over the expansion technology; Compare with traditional handicraft; Remarkable technological and economical advantages that it has that reduce significantly that equipment tonnage and investment, vibratory impulse are little, energy-saving material-saving, production cost are low etc. is the advanced manufacturing technology of all kinds of seamless rings such as bearer ring, gear ring, flange ring, train wheel and rim, gas turbine ring.Ring is rolled over the expansion technology and in many industrial circles such as machinery, automobile, train, boats and ships, petrochemical industry, Aero-Space, atomic energy, is widely used day by day.Cross section, the trapezoidal rank flange ring that the present invention relates to is of many uses, and is high to structure property and dimension precision requirement, utilizes ring rolling technology rolling forming to become a kind of trend gradually.
At present; The trapezoid cross section ring adopts radial rolling to add machine cut processing associating completion usually; Promptly process the ring of square-section earlier through radial rolling, through machine cut the square-section ring is processed into trapezoidal rank section ring parts again, its work flow is: (1) pier is thick; (2) punching; (3) radial rolling; (4) planar end surface; (5) machine cut processing.The subject matter of this explained hereafter trapezoid cross section ring is: (1) allowance is big, and stock utilization is low; (2) production efficiency is low, and labour intensity is big; (3) ring needs repeated heating, and energy consumption is high; (4) production cost is high; (5) once can only make a flange, utilization rate of equipment and installations is low.
Summary of the invention
To above-mentioned deficiency, the object of the present invention is to provide and a kind ofly can roll over the method that expands two trapezoid cross section flange ring forging parts simultaneously, this method has overcome the shortcoming that traditional handicraft once can only be made a flange; Has economical with materials; Reduce energy consumption, cost is low, the characteristics that production efficiency is high.
To achieve these goals, the present invention take technical scheme be:
Roll over the method that expands two trapezoid cross section flange ring forging parts simultaneously, its step is following:
(1) blanking becomes the material section with the sawing of cylindrical steel blank;
(2) above-mentioned material section slowly is heated to design temperature and insulation, in the forging temperature interval, forges into the rolling blank of using with hydraulic press;
(3) above-mentioned ring blank is melted down be heated to design temperature and insulation, put into the accurate rolling forming of the Ring Rolling Machine pass of being made up of jointly special-shaped driven roller and special-shaped core roller, obtaining axial height is the ring rolling spare of the trapezoidal flange height of target twice;
(4) forging symmetry behind the above-mentioned rolling forming is cut into two;
(5) forging after the above-mentioned cutting is processed into product through machine cut.
Material segment length described in the step (1) is L=(2.5～5) B, and B is the axial height of trapezoid cross section flange ring forging part, and material section diameter is confirmed according to the long-pending condition that equates of ring forging volume and material segment body.
The rate of heat addition described in the step (2) is 150 ℃/hour; Stopped 60～80 minutes at 630 ℃～650 ℃; Finally being heated to austenitizing temperature is 1230 ℃～1260 ℃, and the austenitizing temperature retention time is 120～150 minutes, and said forging heat distortion temperature interval is 850 ℃～1230 ℃; Hydraulic press is adopted in said forging, and forging process is a fire, and blank-making technology is operations such as pier is thick, punching, reaming.
Ring blank axial height described in the step (3) is B
0=2B; Ring blanking inner hole maximum gauge is d
B0=d
b/ k, rolling than k=2～5, d
bBe ring rolling spare endoporus maximum gauge; Confirm blanking inner hole minimum diameter d according to hole dimension in the ring rolling spare
S0, d
S0=d
B0-(d
b-d
s), d wherein
sEndoporus minimum diameter for ring rolling spare; Equate to confirm ring blank maximum outside diameter D with ring blank volume according to ring forging volume
bWith minimum outer diameter D
s, and D
B0-D
S0=D
b-d
s, D wherein
bBe ring forging maximum outside diameter, D
sBe minimum outer diameter; In the said rolling forming operation, heating-up temperature is 1230 ℃～1250 ℃, and temperature retention time is 60～90 minutes, and initial forging temperature is 1230 ℃, and final forging temperature is not less than 850 ℃.
Rolling forming described in the step (3); Be will be once more blank behind the heat tracing put into the Ring Rolling Machine pass rolling forming of forming jointly by special-shaped driven roller and special-shaped core roller; It is narrow, middle wide to obtain two ends, and axial height is the ring rolling spare of the trapezoidal flange height of target twice.
In the rolling forming operation described in the step (3), core roller feed speed is calculated as follows:
V is a core roller feed speed in the formula; n
1Be the driven roller rotating speed; R
1, R
2Be respectively the corresponding core roller working face radius of driven roller working face maximum radius and ring blanking inner hole smallest diameter portion; R and r are respectively ring forging outer radius and inside radius, R=D
b/ 2, r=d
s/ 2; F is the coefficient of friction between ring and rolling groove, f=0.05-0.4.
The acetylene-oxygen flame cutting is adopted in cutting described in the step (4), and cutting speed 50-200mm/ minute, ring rolling spare is cut in the middle of axial height, be divided into two trapezoid cross section flange ring forging parts.
Machine cut described in the step (5) processing device therefor is a vertical lathe, and workpiece size is put surplus to 4～12 millimeter by flange ring size after the rough turn processing, and last finish turning is to dimensional requirement.
Manufacturing process is expanded in the rolling that the present invention adopts pair parts to close and rolls, and once can produce two trapezoid cross section flanges, and blank and rolling groove shape are symmetric design, make the strain and stress more even distribution, and the operation of rolling is more steady; Distortion reaches preliminary dimension (size of ring forging) to the ring blank through continuous rolling repeatedly, has improved the tissue and the performance of workpiece metal, makes moulding deformation distribution more even; Shortened the production time; Reduce forging heating number of times, practiced thrift raw material, improved production efficiency; Through appropriate design ring blank dimension and rolling working process parameter, practiced thrift raw material, reduced cost; Reduce distortion of end face fish tail and buckling deformation, guaranteed the quality of trapezoid cross section ring.
Description of drawings
Fig. 1 is a ring forging structural representation of the present invention
Fig. 2 is a ring blahk structure sketch map of the present invention
Fig. 3 is a rolling forming schematic diagram of the present invention
Fig. 4 is the left diagrammatic sketch of Fig. 3
The specific embodiment:
Specify the specific embodiment below in conjunction with accompanying drawing and embodiment, shown in accompanying drawing 1-4.
Roll over the method that expands two trapezoid cross section flange ring forging parts simultaneously, the forging material is the Q345E steel, requires the trapezoid cross section flange ring forging part of roll forming to be of a size of: ring forging maximum outside diameter D
bBe 4000mm, minimum outer diameter D
sBe 3900mm, ring forging endoporus minimum diameter d
sBe 3600mm, ring forging endoporus maximum diameter d
bBe 3700mm, ring forging axial dimension B is 200mm.Its step is following:
(1) blanking becomes the material section with the sawing of cylindrical steel blank; Said material segment length is L=3.5B=750mm, and B is the axial height of trapezoid cross section flange ring forging part, and material section diameter is confirmed as 1070mm according to the long-pending condition that equates of ring forging volume and material segment body.
(2) above-mentioned material section is 150 ℃/hour with the rate of heat addition and slowly is heated to 610 ℃, stop after 80 minutes that be heated to 1260 ℃ with 150 ℃/hour again, temperature retention time is 150 minutes; Getting discharging section is 1230 ℃ forging initial forging temperature, and final forging temperature is to forge into the rolling blank of using with hydraulic press in 870 ℃ the forging temperature interval; Forging process is a fire, adopts operations such as pier is thick, punching, reaming to forge base.
(3) above-mentioned ring blank is melted down be heated to 1250 ℃, temperature retention time is 90 minutes, and initial forging temperature is 1220 ℃, and final forging temperature is not less than 860 ℃; Take out blank and put into the accurate rolling forming of the Ring Rolling Machine pass of forming jointly by special-shaped driven roller and special-shaped core roller; Radial feed speed v=1.8mm/s; Ring blank rolling forming such as Fig. 3, shown in Figure 4; Under rolling motion of the rotation of driven roller 1 and straight-line feed motion effect; Ring blank 2 nip continuously driven roller 1 and the rolling groove that core roller 3 constitutes, the moulding distortion of continuous and local that produce that wall thickness reduces, enlarged-diameter, section of outline is shaped, the effect of guide roller 4 is to guarantee that the operation of rolling is steady among Fig. 4; Through the distortion of many commentaries on classics repeat-rolling, the ring blank diameter is expanded to signal roller 5 contact, then reach the ring forging of regulation geomery, at this moment the ring rolling process finishes.The axial dimension B of final rolling forming blank
0Be 400mm, blanking inner hole largest portion size d
B0Be 1000mm (k=3.7) endoporus least part diameter d
S0Be 900mm, ring blank maximum outside diameter D
B0Be 1810mm, ring blank minimum outer diameter D
S0Be 1710mm, obtaining axial height is the ring rolling spare of the trapezoidal flange height of target twice.
(4) forging behind the above-mentioned rolling forming is adopted the acetylene-oxygen flame cutting, cutting speed 100mm/ minute, ring rolling spare is cut in the middle of axial height, be divided into two trapezoid cross section flange ring forging parts.
(5) forging after the above-mentioned cutting is rough turn through vertical lathe, finish turning is shaped, and rough turn processing back workpiece size is put surplus to 8 millimeter by flange ring size, and finish turning is to dimensional requirement at last.
Roll over the method that expands two trapezoid cross section flange ring forging parts simultaneously, the forging material is the Q345E steel, requires the trapezoid cross section flange ring forging part of roll forming to be of a size of: ring forging maximum outside diameter D
bBe 3200mm, minimum outer diameter D
sBe 3100mm, ring forging endoporus minimum diameter d
sBe 2800mm, ring forging endoporus maximum diameter d
bBe 2900mm, ring forging axial dimension B is 150mm.Its step is following:
(1) blanking becomes the material section with the sawing of cylindrical steel blank; Said material segment length is L=4B=600mm, and B is the axial height of trapezoid cross section flange ring forging part, and material section diameter is confirmed as 800mm according to the long-pending condition that equates of ring forging volume and material segment body.
(2) above-mentioned material section is 150 ℃/hour with the rate of heat addition and slowly is heated to 630 ℃, stop after 70 minutes that be heated to 1250 ℃ with 150 ℃/hour again, temperature retention time is 120 minutes; Getting discharging section is 1220 ℃ forging initial forging temperature, and final forging temperature is to forge into the rolling blank of using with hydraulic press in 860 ℃ the forging temperature interval; Forging process is a fire, adopts operations such as pier is thick, punching, reaming to forge base.
(3) above-mentioned ring blank is melted down be heated to 1250 ℃, temperature retention time is 75 minutes, and initial forging temperature is 1220 ℃, and final forging temperature is not less than 850 ℃; Take out blank and put into the accurate rolling forming of the Ring Rolling Machine pass of forming jointly by special-shaped driven roller and special-shaped core roller, radial feed speed v=2.1mm/s, the axial dimension B of rolling forming blank
0Be 300mm, blanking inner hole largest portion size d
B0Be 900mm (k=3.2) endoporus least part diameter d
S0Be 800mm, ring blank maximum outside diameter D
B0Be 1532mm, ring blank minimum outer diameter D
S0Be 1432mm.Obtaining axial height is the ring rolling spare of the trapezoidal flange height of target twice.
(4) forging behind the above-mentioned rolling forming is adopted the acetylene-oxygen flame cutting, cutting speed 120mm/ minute, ring rolling spare is cut in the middle of axial height, be divided into two trapezoid cross section flange ring forging parts.
(5) forging after the above-mentioned cutting is rough turn through vertical lathe, finish turning is shaped, and rough turn processing back workpiece size is put surplus to 6 millimeter by flange ring size, and finish turning is to dimensional requirement at last.
Roll over the method that expands two trapezoid cross section flange ring forging parts simultaneously, the forging material is the Q345E steel, requires the trapezoid cross section flange ring forging part of roll forming to be of a size of: ring forging maximum outside diameter D
bBe 2500mm, minimum outer diameter D
sBe 2450mm, ring forging endoporus minimum diameter d
sBe 2200mm, ring forging endoporus maximum diameter d
bBe 2250mm, ring forging axial dimension B is 140mm.Its step is following:
(1) blanking becomes the material section with the sawing of cylindrical steel blank; Said material segment length is L=4B=640mm, and B is the axial height of trapezoid cross section flange ring forging part, and material section diameter is confirmed as 630mm according to the long-pending condition that equates of ring forging volume and material segment body.
(2) above-mentioned material section is 150 ℃/hour with the rate of heat addition and slowly is heated to 650 ℃, stop after 60 minutes that be heated to 1260 ℃ with 150 ℃/hour again, temperature retention time is 90 minutes; Getting discharging section is 1230 ℃ forging initial forging temperature, and final forging temperature is to forge into the rolling blank of using with hydraulic press in 870 ℃ the forging temperature interval; Forging process is a fire, adopts operations such as pier is thick, punching, reaming to forge base.
(3) above-mentioned ring blank is melted down be heated to 1240 ℃, temperature retention time is 60 minutes, and initial forging temperature is 1210 ℃, and final forging temperature is not less than 850 ℃; Take out blank and put into the accurate rolling forming of the Ring Rolling Machine pass of forming jointly by special-shaped driven roller and special-shaped core roller, radial feed speed v=2.5mm/s, the axial dimension B of rolling forming blank
0Be 280mm, blanking inner hole largest portion size d
B0Be 650mm (k=3.5) endoporus least part diameter d
S0Be 600mm, ring blank maximum outside diameter D
B0Be 1275mm, ring blank minimum outer diameter D
S0Be 1225mm.Obtaining axial height is the ring rolling spare of the trapezoidal flange height of target twice.
(4) forging behind the above-mentioned rolling forming is adopted the acetylene-oxygen flame cutting, cutting speed 150mm/ minute, ring rolling spare is cut in the middle of axial height, be divided into two trapezoid cross section flange ring forging parts.
(5) forging after the above-mentioned cutting is rough turn through vertical lathe, finish turning is shaped, and rough turn processing back workpiece size is put surplus to 5 millimeter by flange ring size, and finish turning is to dimensional requirement at last.
Claims (8)
1. roll over the method that expands two trapezoid cross section flange ring forging parts simultaneously, it is characterized in that realizing according to the following steps:
(1) blanking becomes the material section with the sawing of cylindrical steel blank;
(2) above-mentioned material section slowly is heated to design temperature and insulation, in the forging temperature interval, forges into the rolling blank of using with hydraulic press;
(3) above-mentioned ring blank is melted down be heated to design temperature and insulation, put into the accurate rolling forming of the Ring Rolling Machine pass of being made up of jointly special-shaped driven roller and special-shaped core roller, obtaining axial height is the ring rolling spare of the trapezoidal flange height of target twice;
(4) forging symmetry behind the above-mentioned rolling forming is cut into two;
(5) forging after the above-mentioned cutting is processed into product through machine cut.
2. the method that expands two trapezoid cross section flange ring forging parts of rolling over simultaneously according to claim 1; It is characterized in that; Material segment length described in the step (1) is L=(2.5～5) B; B is the axial height of trapezoid cross section flange ring forging part, and material section diameter is confirmed according to the long-pending condition that equates of ring forging volume and material segment body.
3. according to the described method that expands two trapezoid cross section flange ring forging parts of rolling over simultaneously of claim 1; It is characterized in that forging process described in the step (2) is a fire, the said rate of heat addition is 150 ℃/hour; Stopped 60～80 minutes at 630 ℃～650 ℃; Finally being heated to austenitizing temperature is 1230 ℃～1260 ℃, and the austenitizing temperature retention time is 120～150 minutes, and said forging heat distortion temperature interval is 850 ℃～1230 ℃; Hydraulic press is adopted in said forging, and blank-making technology is operations such as pier is thick, punching, reaming.
4. according to the described method that expands two trapezoid cross section flange ring forging parts of rolling over simultaneously of claim 1, it is characterized in that the ring blank axial height described in the step (3) is B
0=2B; Ring blanking inner hole maximum gauge is d
B0=d
b/ k, rolling than k=2～5, d
bBe ring rolling spare endoporus maximum gauge; Confirm blanking inner hole minimum diameter d according to hole dimension in the ring rolling spare
S0, d
S0=d
B0-(d
b-d
s), d wherein
sEndoporus minimum diameter for ring rolling spare; Equate to confirm ring blank maximum outside diameter D with ring blank volume according to ring forging volume
bWith minimum outer diameter D
s, and D
B0-D
S0=D
b-d
s, D wherein
bBe ring forging maximum outside diameter, D
sBe minimum outer diameter; In the said rolling forming operation, heating-up temperature is 1230 ℃～1250 ℃, and temperature retention time is 60～90 minutes, and initial forging temperature is 1230 ℃, and final forging temperature is not less than 850 ℃.
5. according to the described method that expands two trapezoid cross section flange ring forging parts of rolling over simultaneously of claim 1; It is characterized in that; Rolling forming described in the step (3); Be will be once more blank behind the heat tracing put into the Ring Rolling Machine pass rolling forming of forming jointly by special-shaped driven roller and special-shaped core roller, obtain that two ends are narrow, the centre is wide, axial height is the ring rolling spare of the trapezoidal flange height of target twice.
6. according to the described method that expands two trapezoid cross section flange ring forging parts of rolling over simultaneously of claim 1, it is characterized in that in the rolling forming operation described in the step (3), core roller feed speed is calculated as follows:
V is a core roller feed speed in the formula; n
1Be the driven roller rotating speed; R
1, R
2Be respectively the corresponding core roller working face radius of driven roller working face maximum radius and ring blanking inner hole smallest diameter portion; R and r are respectively ring forging outer radius and inside radius, R=D
b/ 2, r=d
s/ 2; F is the coefficient of friction between ring and rolling groove, f=0.05-0.4.
7. according to the described method that expands two trapezoid cross section flange ring forging parts of rolling over simultaneously of claim 1; It is characterized in that; The acetylene-oxygen flame cutting is adopted in cutting described in the step (4); Cutting speed 50-200mm/ minute, ring rolling spare is cut in the middle of axial height, be divided into two trapezoid cross section flange ring forging parts.
8. according to the described method that expands two trapezoid cross section flange ring forging parts of rolling over simultaneously of claim 1; It is characterized in that; Machine cut processing device therefor described in the step (5) is a vertical lathe; Rough turn processing back workpiece size is put surplus to 4～12 millimeter by flange ring size, and last finish turning is to dimensional requirement.
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| CN201210088268.6A CN102615223B (en) | 2012-03-30 | 2012-03-30 | The method of rolling two trapezoid cross section flange ring forging parts simultaneously |
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|---|---|---|---|
| CN201210088268.6A CN102615223B (en) | 2012-03-30 | 2012-03-30 | The method of rolling two trapezoid cross section flange ring forging parts simultaneously |
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| CN102615223B CN102615223B (en) | 2015-08-19 |
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Application publication date: 20120801 Assignee: Elite Energy Equipment Co.,Ltd. Assignor: SHANDONG JIANZHU University Contract record no.: X2022980010692 Denomination of invention: Method of rolling two trapezoidal section flange ring forgings at the same time Granted publication date: 20150819 License type: Common License Record date: 20220720 |
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Application publication date: 20120801 Assignee: SHANDONG BAODING HEAVY INDUSTRIAL CO.,LTD. Assignor: SHANDONG JIANZHU University Contract record no.: X2022980011888 Denomination of invention: Simultaneous rolling method of two trapezoidal section flange ring forgings Granted publication date: 20150819 License type: Common License Record date: 20220803 |
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