CN102615223B - The method of rolling two trapezoid cross section flange ring forging parts simultaneously - Google Patents

The method of rolling two trapezoid cross section flange ring forging parts simultaneously Download PDF

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Publication number
CN102615223B
CN102615223B CN201210088268.6A CN201210088268A CN102615223B CN 102615223 B CN102615223 B CN 102615223B CN 201210088268 A CN201210088268 A CN 201210088268A CN 102615223 B CN102615223 B CN 102615223B
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ring
forging
rolling
trapezoid
flange
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CN201210088268.6A
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Chinese (zh)
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CN102615223A (en
Inventor
景财年
甘洋洋
蔡元兴
徐淑波
刘敬广
于承雪
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山东建筑大学
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Abstract

The method of rolling two trapezoid cross section flange ring forging parts while of the present invention relates to a kind of.Cylindrical steel billet sawing is first become material section by the method, material section is uniformly heated to austenitizing temperature from room temperature and is incubated, and then by thick for the section of expecting pier, punching, reaming, makes rolling ring blank; The blank obtained is melted down heating, reach target temperature and put into the Ring Rolling Machine pass rolling forming be jointly made up of special-shaped driven roller and special-shaped core roller after insulation, obtain two ends narrow, middle wide, axial height is the ring forging of target trapezoidal flange height twice, above-mentioned gained ring forging is cut in the middle of axial height, be divided into two symmetrically by workpiece, obtain two trapezoid cross section flange ring forging parts, last forging becomes finished product flange through turnery processing.The present invention is that a kind of production efficiency is high, energy-conserving and environment-protective, raising utilization rate of raw materials and product quality trapezoid cross section flange ring forging part roll over ring manufacture method.

Description

The method of rolling two trapezoid cross section flange ring forging parts simultaneously

Technical field

The present invention relates to a kind of method of annular flange part rolling forming, the method for rolling two trapezoid cross section flange ring forging parts while of particularly a kind of.

Background technology

Along with progress and the expanding economy of science and technology, increasing to the demand of annular element especially large-sized ring part in industrial production, in some main equipment, annular element has become the critical component affecting performance indications.Current countries in the world conduct extensive research the production of annular element and processing technology, and the annular element size range that can manufacture constantly expands, and cross sectional shape is more complicated, and Material selec-tion constantly increases, also more and more higher to manufacturing process requirement.

The production of traditional annular element especially large-sized ring part such as wind power flange mainly adopts the methods such as open die forging, Integral die-forged and saddle forging, ring rolling technology is that continuous local plastic shapes technique, compared with traditional handicraft, the remarkable technological and economical advantages such as it has significantly reduction equipment tonnage and investment, vibratory impulse is little, energy-saving material-saving, production cost are low are the advanced manufacturing technologies of all kinds of seamless ring such as bearer ring, gear ring, flange ring, train wheel and rim, gas turbine ring.Ring rolling technology is day by day widely used in many industrial circles such as machinery, automobile, train, boats and ships, petrochemical industry, Aero-Space, atomic energy.Cross section, the trapezoidal rank flange ring that the present invention relates to is of many uses, to structure property and dimension precision requirement high, utilize Ring Rolling Technology & rolling forming to become a kind of trend gradually.

At present, trapezoid cross section ring usually adopt radial rolling add machine cut processing combined, namely first processed the ring of square-section by radial rolling, then by machine cut, square-section ring is processed into trapezoidal rank section ring parts, 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 large, and stock utilization is low; (2) production efficiency is low, and labour intensity is large; (3) ring needs repeatedly to heat, and energy consumption is high; (4) production cost is high; (5) once can only manufacture a flange, utilization rate of equipment and installations is low.

Summary of the invention

For above-mentioned deficiency, the object of the present invention is to provide a kind of can the method for simultaneously rolling two trapezoid cross section flange ring forging parts, this method overcomes the shortcoming that traditional handicraft once can only manufacture a flange, there is saving material, reduce energy consumption, cost is low, the feature that production efficiency is high.

To achieve these goals, the present invention take technical scheme be:

The method of rolling two trapezoid cross section flange ring forging parts simultaneously, its step is as follows:

(1) blanking, becomes material section by cylindrical steel Billet cutting;

(2) above-mentioned material section be slowly heated to design temperature and be incubated, in forging temperature interval, being forged into rolling blank with hydraulic press;

(3) above-mentioned ring blank is melted down be heated to design temperature and be incubated, put into the Ring Rolling Machine pass accurately rolling forming be jointly made up of special-shaped driven roller and special-shaped core roller, obtain the ring forging that axial height is target trapezoidal flange height twice;

(4) forging symmetry after above-mentioned rolling forming is cut into two pieces;

(5) forging after above-mentioned cutting is processed into product through machine cut.

The axial height of to be L=(2.5 ~ 5) B, B the be trapezoid cross section flange ring forging part of the material segment length described in step (1), material section diameter according to ring forging volume with expect that segment body amasss equal condition and determines.

The rate of heat addition described in step (2) is 150 DEG C/h, stop 60 ~ 80 minutes at 630 DEG C ~ 650 DEG C, finally being heated to austenitizing temperature is 1230 DEG C ~ 1260 DEG C, austenitizing holding time is 120 ~ 150 minutes, and described forging heat distortion temperature interval is 850 DEG C ~ 1230 DEG C; Described forging adopts hydraulic press, and forging process is a fire, and blank-making technology is the operations such as pier is thick, punching, reaming.

Ring blank axial height described in step (3) is B 0=2B; Ring blank endoporus maximum gauge is d b0=d b/ k, rolling than k=2 ~ 5, d bfor ring forging endoporus maximum gauge; According to ring forging hole size determination blanking inner hole minimum diameter d s0, d s0=d b0-(d b-d s), wherein d sfor the endoporus minimum diameter of ring forging; Ring blank maximum outside diameter D is determined according to ring forging volume is equal with ring blank volume bwith minimum outer diameter D s, and D b0-D s0=D b-d s, wherein D bfor ring forging maximum outside diameter, D sfor minimum outer diameter; In described rolling forming operation, heating-up temperature is 1230 DEG C ~ 1250 DEG C, and temperature retention time is 60 ~ 90 minutes, and initial forging temperature is 1230 DEG C, and final forging temperature is not less than 850 DEG C.

Rolling forming described in step (3), that the blank after heating and thermal insulation is again put into the Ring Rolling Machine pass rolling forming be jointly made up of special-shaped driven roller and special-shaped core roller, obtain two ends narrow, middle wide, axial height is the ring forging of target trapezoidal flange height twice.

In rolling forming operation described in step (3), feed rate of idle roll is calculated as follows:

v = f 2 n 1 R 1 2 R ( 1 + R 1 R 2 ) 2 ( 1 + R 1 R 2 + R 1 R - R 1 r )

In formula, v is feed rate of idle roll; n 1for driven roller rotating speed; R 1, R 2be respectively driven roller working face maximum radius and core roller working face radius corresponding to ring blank endoporus smallest diameter portion; R and r is 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.

Cutting described in step (4) adopts acetylene-oxygen flame cutting, and ring forging cuts, is divided into two pieces trapezoid cross section flange ring forging part by cutting speed 50-200mm/ minute in the middle of axial height.

Machine cut processing device therefor described in step (5) is vertical lathe, and after rough turn processing, workpiece size puts surplus to 4 ~ 12 millimeter by flange ring size, and last finish turning is to dimensional requirement.

The present invention adopts double-piece to close the rolling manufacturing process of rolling, once can production two pieces trapezoid cross section flange, and blank and rolling groove shape are symmetric design, and strain and stress is distributed more even, the operation of rolling is more steady; Ring blank reaches preliminary dimension (size of ring forging) through the distortion of repeatedly continuous rolling, improves the structure and properties of workpiece metal, plastic deformation is distributed more even, shorten the production time, decrease forging heating times, saved raw material, improve production efficiency; By appropriate design ring blank size and rolling working process parameter, save raw material, reduced cost; Reduce the distortion of end face fish tail and buckling deformation, ensure the quality of trapezoid cross section ring.

Accompanying drawing explanation

Fig. 1 is ring forging structural representation of the present invention

Fig. 2 is ring blank structural representation of the present invention

Fig. 3 is rolling forming schematic diagram of the present invention

Fig. 4 is the left diagram of Fig. 3

Detailed description of the invention:

Detailed description of the invention is described in detail, as shown in accompanying drawing 1-4 below in conjunction with drawings and Examples.

Embodiment 1

The method of rolling two trapezoid cross section flange ring forging parts simultaneously, forging material is Q345E steel, requires that the trapezoid cross section flange ring forging part of roll forming is of a size of: ring forging maximum outside diameter D bfor 4000mm, minimum outer diameter D sfor 3900mm, ring forging endoporus minimum diameter d sfor 3600mm, ring forging endoporus maximum diameter d bfor 3700mm, ring forging axial dimension B is 200mm.Its step is as follows:

(1) blanking, becomes material section by cylindrical steel Billet cutting; The axial height of described material segment length to be L=3.5B=750mm, B be trapezoid cross section flange ring forging part, material section diameter according to ring forging volume with expect that segment body amasss equal condition and is defined as 1070mm.

(2) above-mentioned material section is 150 DEG C/h with the rate of heat addition and is slowly heated to 610 DEG C, stop after 80 minutes, then be heated to 1260 DEG C with 150 DEG C/h, temperature retention time is 150 minutes; Getting discharging section at forging initial forging temperature is 1230 DEG C, and final forging temperature is be forged into rolling blank with hydraulic press in the forging temperature interval of 870 DEG C; Forging process is a fire, adopts the operations such as pier is thick, punching, reaming to forge base.

(3) melted down by above-mentioned ring blank and be heated to 1250 DEG C, temperature retention time is 90 minutes, and initial forging temperature is 1220 DEG C, and final forging temperature is not less than 860 DEG C; Take out blank and put into the Ring Rolling Machine pass accurately rolling forming be jointly made up of special-shaped driven roller and special-shaped core roller, radial feed speed v=1.8mm/s, ring blank rolling forming as shown in Figure 3, Figure 4, under the rotation rolling campaign and straight-line feed motion effect of driven roller 1, ring blank 2 is nipped the rolling groove that driven roller 1 and core roller 3 are formed continuously, produce the continuous and local plastic deformation of wall thickness reduction, enlarged-diameter, section of outline shaping, in Fig. 4, the effect of guide roller 4 ensures that the operation of rolling is steady; By turning repeat-rolling distortion, ring blank enlarged-diameter is contacted to signal roller 5, then reach the ring forging of regulation geomery, at this moment ring rolling process terminates more.The axial dimension B of final rolling forming blank 0for 400mm, blanking inner hole largest portion size d b0for 1000mm (k=3.7), endoporus least part diameter d s0for 900mm, ring blank maximum outside diameter D b0for 1810mm, ring blank minimum outer diameter D s0for 1710mm, obtain the ring forging that axial height is target trapezoidal flange height twice.

(4) forging after above-mentioned rolling forming is adopted acetylene-oxygen flame cutting, cutting speed 100mm/ minute, ring forging is cut in the middle of axial height, is divided into two pieces trapezoid cross section flange ring forging part.

(5) rough turn through vertical lathe for forging after above-mentioned cutting, finish turning are shaped, after rough turn processing, workpiece size puts surplus to 8 millimeter by flange ring size, and last finish turning is to dimensional requirement.

Embodiment 2

The method of rolling two trapezoid cross section flange ring forging parts simultaneously, forging material is Q345E steel, requires that the trapezoid cross section flange ring forging part of roll forming is of a size of: ring forging maximum outside diameter D bfor 3200mm, minimum outer diameter D sfor 3100mm, ring forging endoporus minimum diameter d sfor 2800mm, ring forging endoporus maximum diameter d bfor 2900mm, ring forging axial dimension B is 150mm.Its step is as follows:

(1) blanking, becomes material section by cylindrical steel Billet cutting; The axial height of described material segment length to be L=4B=600mm, B be trapezoid cross section flange ring forging part, material section diameter according to ring forging volume with expect that segment body amasss equal condition and is defined as 800mm.

(2) above-mentioned material section is 150 DEG C/h with the rate of heat addition and is slowly heated to 630 DEG C, stop after 70 minutes, then be heated to 1250 DEG C with 150 DEG C/h, temperature retention time is 120 minutes; Getting discharging section at forging initial forging temperature is 1220 DEG C, and final forging temperature is be forged into rolling blank with hydraulic press in the forging temperature interval of 860 DEG C; Forging process is a fire, adopts the operations such as pier is thick, punching, reaming to forge base.

(3) melted down by above-mentioned ring blank and be heated to 1250 DEG C, temperature retention time is 75 minutes, and initial forging temperature is 1220 DEG C, and final forging temperature is not less than 850 DEG C; Take out blank and put into the Ring Rolling Machine pass accurately rolling forming be jointly made up of special-shaped driven roller and special-shaped core roller, radial feed speed v=2.1mm/s, the axial dimension B of rolling forming blank 0for 300mm, blanking inner hole largest portion size d b0for 900mm (k=3.2), endoporus least part diameter d s0for 800mm, ring blank maximum outside diameter D b0for 1532mm, ring blank minimum outer diameter D s0for 1432mm.Obtain the ring forging that axial height is target trapezoidal flange height twice.

(4) forging after above-mentioned rolling forming is adopted acetylene-oxygen flame cutting, cutting speed 120mm/ minute, ring forging is cut in the middle of axial height, is divided into two pieces trapezoid cross section flange ring forging part.

(5) rough turn through vertical lathe for forging after above-mentioned cutting, finish turning are shaped, after rough turn processing, workpiece size puts surplus to 6 millimeter by flange ring size, and last finish turning is to dimensional requirement.

Embodiment 3

The method of rolling two trapezoid cross section flange ring forging parts simultaneously, forging material is Q345E steel, requires that the trapezoid cross section flange ring forging part of roll forming is of a size of: ring forging maximum outside diameter D bfor 2500mm, minimum outer diameter D sfor 2450mm, ring forging endoporus minimum diameter d sfor 2200mm, ring forging endoporus maximum diameter d bfor 2250mm, ring forging axial dimension B is 140mm.Its step is as follows:

(1) blanking, becomes material section by cylindrical steel Billet cutting; The axial height of described material segment length to be L=4B=640mm, B be trapezoid cross section flange ring forging part, material section diameter according to ring forging volume with expect that segment body amasss equal condition and is defined as 630mm.

(2) above-mentioned material section is 150 DEG C/h with the rate of heat addition and is slowly heated to 650 DEG C, stop after 60 minutes, then be heated to 1260 DEG C with 150 DEG C/h, temperature retention time is 90 minutes; Getting discharging section at forging initial forging temperature is 1230 DEG C, and final forging temperature is be forged into rolling blank with hydraulic press in the forging temperature interval of 870 DEG C; Forging process is a fire, adopts the operations such as pier is thick, punching, reaming to forge base.

(3) melted down by above-mentioned ring blank and be heated to 1240 DEG C, temperature retention time is 60 minutes, and initial forging temperature is 1210 DEG C, and final forging temperature is not less than 850 DEG C; Take out blank and put into the Ring Rolling Machine pass accurately rolling forming be jointly made up of special-shaped driven roller and special-shaped core roller, radial feed speed v=2.5mm/s, the axial dimension B of rolling forming blank 0for 280mm, blanking inner hole largest portion size d b0for 650mm (k=3.5), endoporus least part diameter d s0for 600mm, ring blank maximum outside diameter D b0for 1275mm, ring blank minimum outer diameter D s0for 1225mm.Obtain the ring forging that axial height is target trapezoidal flange height twice.

(4) forging after above-mentioned rolling forming is adopted acetylene-oxygen flame cutting, cutting speed 150mm/ minute, ring forging is cut in the middle of axial height, is divided into two pieces trapezoid cross section flange ring forging part.

(5) rough turn through vertical lathe for forging after above-mentioned cutting, finish turning are shaped, after rough turn processing, workpiece size puts surplus to 5 millimeter by flange ring size, and last finish turning is to dimensional requirement.

Claims (7)

1. the method for rolling two trapezoid cross section flange ring forging parts while, is characterized in that realizing according to the following steps:
(1) blanking, becomes material section by cylindrical steel Billet cutting;
(2) above-mentioned material section be slowly heated to design temperature and be incubated, in forging temperature interval, being forged into rolling ring blank with hydraulic press;
Described forging process is a fire, the described rate of heat addition is 150 DEG C/h, stop 60 ~ 80 minutes at 630 DEG C ~ 650 DEG C, finally being heated to austenitizing temperature is 1230 DEG C ~ 1260 DEG C, austenitizing holding time is 120 ~ 150 minutes, and described forging heat distortion temperature interval is 850 DEG C ~ 1230 DEG C; Described forging adopts hydraulic press, blank-making technology is that pier is thick, punching, reaming operation;
(3) above-mentioned ring blank is melted down be heated to design temperature and be incubated, put into the Ring Rolling Machine pass accurately rolling forming be jointly made up of special-shaped driven roller and special-shaped core roller, obtain the ring forging that axial height is target trapezoidal flange height twice;
(4) forging symmetry after above-mentioned rolling forming is cut into two pieces;
(5) forging after above-mentioned cutting is processed into product through machine cut.
2. the method for rolling two trapezoid cross section flange ring forging parts while according to claim 1, it is characterized in that, material segment length described in 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 amasss equal condition according to ring forging volume with material segment body and determines.
3. according to the method for two the trapezoid cross section flange ring forging parts of rolling while according to claim 1, it is characterized in that, the ring blank axial height described in step (3) is B 0=2B; Ring blank endoporus maximum gauge is d b0=d b/ k, rolling than k=2 ~ 5, d bfor ring forging endoporus maximum gauge; According to ring forging hole size determination blanking inner hole minimum diameter d s0, d s0=d b0-(d b-d s), wherein d sfor the endoporus minimum diameter of ring forging; Ring blank maximum outside diameter D is determined according to ring forging volume is equal with ring blank volume bwith minimum outer diameter D s, and D b0-D s0=D b-d s, wherein D bfor ring forging maximum outside diameter, D sfor minimum outer diameter; In described rolling forming operation, heating-up temperature is 1230 DEG C ~ 1250 DEG C, and temperature retention time is 60 ~ 90 minutes, and initial forging temperature is 1230 DEG C, and final forging temperature is not less than 850 DEG C.
4. according to the method for two the trapezoid cross section flange ring forging parts of rolling while according to claim 1, it is characterized in that, rolling forming described in step (3), that the blank after heating and thermal insulation is again put into the Ring Rolling Machine pass rolling forming be jointly made up of special-shaped driven roller and special-shaped core roller, obtain two ends narrow, middle wide, axial height is the ring forging of target trapezoidal flange height twice.
5. according to the method for two the trapezoid cross section flange ring forging parts of rolling while according to claim 1, it is characterized in that, in the rolling forming operation described in step (3), feed rate of idle roll is calculated as follows:
v = f 2 n 1 R 1 2 R ( 1 + R 1 R 2 ) 2 ( 1 + R 1 R 2 + R 1 R - R 1 r )
In formula, v is feed rate of idle roll; n 1for driven roller rotating speed; R 1, R 2be respectively driven roller working face maximum radius and core roller working face radius corresponding to ring blank endoporus smallest diameter portion; R and r is 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.
6. according to the method for two the trapezoid cross section flange ring forging parts of rolling while according to claim 1, it is characterized in that, cutting described in step (4) adopts acetylene-oxygen flame cutting, cutting speed 50-200mm/ minute, ring forging is cut in the middle of axial height, is divided into two pieces trapezoid cross section flange ring forging part.
7. according to the method for two the trapezoid cross section flange ring forging parts of rolling while according to claim 1, it is characterized in that, machine cut processing device therefor described in step (5) is vertical lathe, after rough turn processing, workpiece size puts surplus to 4 ~ 12 millimeter by flange ring size, and last finish turning is to dimensional requirement.
CN201210088268.6A 2012-03-30 2012-03-30 The method of rolling two trapezoid cross section flange ring forging parts simultaneously CN102615223B (en)

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