CN111085638A - Rolling forming method of T-shaped section full-fiber gear ring - Google Patents
Rolling forming method of T-shaped section full-fiber gear ring Download PDFInfo
- Publication number
- CN111085638A CN111085638A CN201911342219.9A CN201911342219A CN111085638A CN 111085638 A CN111085638 A CN 111085638A CN 201911342219 A CN201911342219 A CN 201911342219A CN 111085638 A CN111085638 A CN 111085638A
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- blank
- ring
- gear ring
- shaped section
- forming method
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- 238000005096 rolling process Methods 0.000 title claims abstract description 31
- 239000000835 fiber Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005242 forging Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 238000004080 punching Methods 0.000 claims abstract description 4
- 238000003303 reheating Methods 0.000 claims abstract description 3
- 238000005452 bending Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 2
- 238000003754 machining Methods 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
Abstract
The invention discloses a rolling forming method of a T-shaped section full-fiber gear ring, which comprises the following steps: designing a ring blank: designing the ring blank according to the size of the forging, the size of the core roller, the distribution ratio of deformation amount, the deformation rule, the cross section similarity principle and the like; blanking and heating: blanking according to the weight of the forge piece, and heating to the initial forging temperature; blank preparation: upsetting and punching round holes on the heated blank, then adopting a special-shaped punch to sequentially press steps on two side faces of the blank, and rounding the excircle as much as possible until various designed sizes are met, thereby completing blank making; and (3) reheating the prepared ring blank to the initial forging temperature, preserving the heat for a period of time, and then performing rolling forming on a horizontal ring rolling machine to obtain the T-shaped section full-fiber gear ring. The utilization rate of raw materials is improved, the machining allowance is reduced, the machining period of products is shortened, and the produced gear ring is good in streamline and simple in process.
Description
Technical Field
The invention belongs to the technical field of processing of special-shaped cross-section ring pieces, and relates to a rolling forming method of a T-shaped cross-section full-fiber gear ring.
Background
The T-shaped section gear ring is a typical vertically symmetrical special-shaped section ring and is widely applied to the fields of petroleum, wind power equipment and the like. Because the rolling deformation rule of the ring is complex, the rolling forming difficulty is high, and the rolling forming quality is difficult to ensure, the ring is often rolled into a ring with a rectangular section in production, and then the ring is formed by subsequent machining, so that the machining allowance is large, the material utilization rate is low, the machining period is long, and the metal flow linearity of the forged piece is poor. Therefore, the direct rolling forming technology of the ring is a key technology which is urgently needed to be solved at present.
Disclosure of Invention
The invention aims to provide a rolling forming method of a T-shaped section full-fiber gear ring, which solves the problems of large production machining allowance, low material utilization rate and poor forging streamline of the traditional T-shaped section gear ring.
The technical scheme adopted by the invention is that the forming and rolling method of the T-shaped section full-fiber gear ring specifically comprises the following working procedures:
step 1, ring blank design: designing the ring blank according to the size of the forging, the size of the core roller, the distribution ratio of deformation amount, the deformation rule, the cross section similarity principle and the like;
step 3, blank making: upsetting and punching round holes on the heated blank, then adopting a special-shaped punch to sequentially press steps on two side faces of the blank, and rounding the excircle as much as possible until various designed sizes are met, thereby completing blank making;
and 4, reheating the prepared ring blank to the initial forging temperature, keeping the temperature for a period of time, and then performing rolling forming on a horizontal ring rolling machine to obtain the T-shaped section full-fiber gear ring.
The invention is also characterized in that:
height H of the ring blank in step 10The height H of the ring blank is the same as that of the forged piece, the inner diameter of the ring blank is 30-50 mm larger than the outer diameter of the core roller (3), and the step thickness H of the ring blankmThe thickness of the ring blank is consistent with that of the rib plate of the forging piece, so that the step of the ring blank can be embedded into the rolling pass.
In the step 3, the height of the top straight platform of the adopted special-shaped punch is 50-80 mm, the special-shaped punch is convenient to clamp, the inclination of the middle part is 27-35 degrees, and the height H of the bottom straight platform is HcThe thickness H of the ring blank stepmAnd the outer diameter of the bottom straight platform is the same as the inner diameter of the ring blank.
In step 4, the heat preservation time is determined by the material and the size of the ring blank.
In the step 4, the rolling is specifically as follows:
the driving roller rotates to perform rolling motion, the core roller stably feeds along a straight line, the upper conical roller does not perform axial feeding and only performs rotary motion, the fishtail defect is eliminated, and the lower conical roller only performs rotary motion; under the action of each roller, the wall thickness of the ring blank is gradually reduced, the rib plates are gradually filled and formed, and the outer diameter of the ring blank is gradually increased.
The core roller is a special-shaped core roller, the section of the core roller is the same as that of the T-shaped section full-fiber gear ring, the width and the height of the hole pattern are consistent with that of the steps of the forge piece, the inclination of the upper surface and the lower surface of the hole pattern is 25 degrees, and the excircle angle is 50mm, so that metal flowing is facilitated, and hole pattern filling is facilitated.
The minimum working diameter of the core roll is checked by the following formula:
in the formula sigmacaCalculated stress for the shaft, McaTo calculate the bending moment, W is the bending section coefficient of the shaft, M is the bending moment applied to the shaft, T is the torque applied to the shaft, a is the coefficient of folding, d is the diameter of the shaft, [ sigma-1]bThe allowable bending stress of the shaft.
The invention has the beneficial effects that:
through the matched movement of the driving roller, the core roller and the upper and lower conical rollers, the rolling forming of the T-shaped section gear ring forge piece is realized, the utilization rate of raw materials is improved, the machining allowance is reduced, the machining period of a product is shortened, and the produced gear ring has good flow linearity and a simple process.
Drawings
FIG. 1 is a schematic view of a ring blank design of a ring gear of the present invention;
FIG. 2 is a schematic structural diagram of a special-shaped punch in the rolling forming method of the T-shaped section full-fiber gear ring of the invention;
FIG. 3 is a schematic diagram of the roll forming method of the T-section full-fiber gear ring of the present invention;
FIG. 4 is a schematic structural view of a core roller in the roll forming method of the T-shaped section full-fiber gear ring of the invention;
FIG. 5 is a schematic structural view of a T-section full-fiber gear ring of the invention.
In the figure, 1 is a driving roller, 2 is a ring blank, 3 is a core roller, 4 is an upper conical roller, and 5 is a lower conical roller.
Detailed Description
The following describes the specific embodiment of the invention in detail by taking a gear ring forging with the material of 42CrMoA and the specification of phi 1495mm phi 1220mm phi 1080mm 360mm 70mm (Df0 x Df0 x Df1 x H Hf) as an example.
As shown in fig. 3, a rolling forming method of a full-fiber gear ring with a T-shaped cross section specifically includes the following steps:
step 1, ring blank design: designing the ring blank 2 according to the size of the forging, the size of the core roller, the distribution ratio of the deformation amount, the deformation rule, the cross section similarity principle and the like, wherein Dm01035mm, dmoIs 600mm, dm1Is 370mm, H0Is 360mm, HmIs 70mm.
step 3, blank making: upsetting and punching round holes on the heated blank, then adopting a special-shaped punch to sequentially press steps on two side faces of the blank, and rounding the excircle as much as possible until various designed sizes are met, thereby completing blank making;
and 4, hot charging the prepared ring blank 2 into a furnace, heating to the initial forging temperature, preserving heat for 2-3 hours, and then performing roll forming on a horizontal ring rolling machine to obtain the T-shaped section full-fiber gear ring.
As shown in fig. 1, the height H of the ring blank 2 in step 10The height H of the forged piece is the same, the inner diameter of the ring blank 2 is 30-50 mm larger than the outer diameter of the core roller 3, and the step thickness H of the ring blank 2 ismThickness H of forging rib platefAnd the step sizes are consistent so as to ensure that the steps of the ring blank 2 can be embedded into the rolling pass.
As shown in fig. 2, in step 3, the height of the top straight platform of the special punch is 50-80 mm, so that the special punch is convenient to clamp, the inclination of the middle part is 27-35 degrees, the height Hc of the bottom straight platform is the same as the thickness Hm of the step of the ring blank 2, and the outer diameter of the bottom straight platform is the same as the inner diameter of the ring blank 2.
In the step 4, the rolling is specifically as follows:
the driving roller 1 rotates to perform rolling motion, the core roller 3 stably feeds along a straight line, the upper conical roller 4 does not perform axial feeding and only performs rotary motion, the fishtail defect is eliminated, and the lower conical roller only performs rotary motion; under the action of each roller, the wall thickness of the ring blank 2 is gradually reduced, the rib plates are gradually filled and formed, and the outer diameter is gradually increased.
As shown in fig. 4, the core roll 3 is a special-shaped core roll, wherein the parts i and iii are matched with the ring rolling machine, the structure is different with the equipment, the section II is a working section, the section is designed according to the section shape of the forged piece, the width and height of the hole pattern are consistent with the steps of the forged piece, the inclination of the upper surface and the lower surface of the hole pattern is 25 degrees, and the excircle angle is 50mm, so that the metal flow is facilitated, and the hole pattern filling is facilitated.
The minimum working diameter of the core roll 3 is checked by the following formula:
in the formula sigmacaCalculated stress for the shaft, McaTo calculate the bending moment, W is the bending section coefficient of the shaft, M is the bending moment applied to the shaft, T is the torque applied to the shaft, a is the coefficient of folding, d is the diameter of the shaft, [ sigma-1]bThe allowable bending stress of the shaft.
Through the matching motion of the driving roller 1, the core roller 3, the upper conical roller 4 and the lower conical roller 5, the rolling forming of the T-shaped section gear ring forge piece is realized, the utilization rate of raw materials is improved, the machining allowance is reduced, the machining period of a product is shortened, and the produced gear ring has good flow linearity and a simple process.
Claims (7)
1. A rolling forming method of a T-shaped section full-fiber gear ring is characterized by comprising the following steps:
step 1, ring blank design: designing the ring blank (2) according to the size of the forging, the size of the core roller, the distribution ratio of deformation amount, the deformation rule, the cross section similarity principle and the like;
step 2, blanking and heating: blanking according to the weight of the forge piece, and heating to the initial forging temperature;
step 3, blank making: upsetting and punching round holes on the heated blank, then adopting a special-shaped punch to sequentially press steps on two side faces of the blank, and rounding the excircle as much as possible until various designed sizes are met, thereby completing blank making;
and 4, reheating the prepared ring blank (2) to the initial forging temperature, preserving the heat for a period of time, and then performing roll forming on a horizontal ring rolling machine to obtain the T-shaped section full-fiber gear ring.
2. The roll forming method for the T-shaped section full-fiber gear ring according to claim 1, wherein the height H of the ring blank (2) in the step 1 is0The height H of the ring blank is the same as that of the forged piece, the inner diameter of the ring blank (2) is 30-50 mm larger than the outer diameter of the core roller (3), and the step thickness H of the ring blank (2)mThickness H of forging rib platefAnd the step sizes are consistent so as to ensure that the steps of the ring blank (2) can be embedded into the rolling pass.
3. The roll forming method of the T-shaped section full-fiber gear ring according to claim 1, wherein in the step 3, the height of a straight platform at the top of the special-shaped punch is 50-80 mm, so that the special-shaped punch is convenient to clamp, the inclination of the middle part is 27-35 degrees, the height Hc of the straight platform at the bottom is the same as the thickness Hm of the step of the ring blank (2), and the outer diameter of the straight platform at the bottom is the same as the inner diameter of the ring blank (2).
4. The roll forming method for the T-shaped section full-fiber gear ring according to the claim 1, wherein in the step 4, the heat preservation time is determined by the material and the size of the ring blank (2).
5. The roll forming method for the T-shaped section full-fiber gear ring according to claim 1, wherein in the step 4, the rolling is performed in a specific manner as follows:
the driving roller (1) rotates to perform rolling motion, the core roller (3) feeds stably along a straight line, the upper conical roller (4) does not feed axially and only rotates to eliminate fishtail defects, and the lower conical roller (5) only rotates; under the action of each roller, the wall thickness of the ring blank (2) is gradually reduced, the rib plates are gradually filled and formed, and the outer diameter is gradually increased.
6. The roll forming method of the T-shaped section full-fiber gear ring according to claim 5, wherein the core roll (3) is a special-shaped core roll, the section of the special-shaped core roll is the same as that of the T-shaped section full-fiber gear ring, the width and the height of the hole pattern are consistent with the steps of the forge piece, the inclination of the upper surface and the lower surface of the hole pattern is 25 degrees, and the excircle angle is 50mm, so that metal flow is facilitated, and hole pattern filling is facilitated.
7. A roll forming method of a T-section full-fiber ring gear according to claim 5, characterized in that the minimum working diameter of the core roll (3) is checked by the following formula:
in the formula sigmacaCalculated stress for the shaft, McaTo calculate the bending moment, W is the bending section coefficient of the shaft, M is the bending moment applied to the shaft, T is the torque applied to the shaft, a is the coefficient of folding, d is the diameter of the shaft, [ sigma ]-1]bThe allowable bending stress of the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911342219.9A CN111085638B (en) | 2019-12-23 | 2019-12-23 | Rolling forming method of T-shaped section full-fiber gear ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911342219.9A CN111085638B (en) | 2019-12-23 | 2019-12-23 | Rolling forming method of T-shaped section full-fiber gear ring |
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| CN111085638A true CN111085638A (en) | 2020-05-01 |
| CN111085638B CN111085638B (en) | 2022-03-29 |
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| CN201911342219.9A Expired - Fee Related CN111085638B (en) | 2019-12-23 | 2019-12-23 | Rolling forming method of T-shaped section full-fiber gear ring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112935168A (en) * | 2021-01-28 | 2021-06-11 | 伊莱特能源装备股份有限公司 | Special-shaped bumper, core roller die and ring rolling forming process of inner step gear forging die |
| CN113334026A (en) * | 2021-05-12 | 2021-09-03 | 山西昊坤法兰股份有限公司 | 00Cr22Ni5Mo3N lock ring processing method capable of eliminating deformation and reducing material consumption |
| CN114043166A (en) * | 2021-10-21 | 2022-02-15 | 贵阳安大宇航材料工程有限公司 | Manufacturing method of nickel-based superalloy asymmetric special-shaped ring forging |
| CN116099966A (en) * | 2023-04-07 | 2023-05-12 | 山西天宝集团有限公司 | Down-pressure ring rolling equipment for T-shaped wind power flange |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112935168A (en) * | 2021-01-28 | 2021-06-11 | 伊莱特能源装备股份有限公司 | Special-shaped bumper, core roller die and ring rolling forming process of inner step gear forging die |
| CN113334026A (en) * | 2021-05-12 | 2021-09-03 | 山西昊坤法兰股份有限公司 | 00Cr22Ni5Mo3N lock ring processing method capable of eliminating deformation and reducing material consumption |
| CN113334026B (en) * | 2021-05-12 | 2022-08-09 | 山西昊坤法兰股份有限公司 | 00Cr22Ni5Mo3N lock ring processing method capable of eliminating deformation and reducing material consumption |
| CN114043166A (en) * | 2021-10-21 | 2022-02-15 | 贵阳安大宇航材料工程有限公司 | Manufacturing method of nickel-based superalloy asymmetric special-shaped ring forging |
| CN116099966A (en) * | 2023-04-07 | 2023-05-12 | 山西天宝集团有限公司 | Down-pressure ring rolling equipment for T-shaped wind power flange |
| CN116099966B (en) * | 2023-04-07 | 2023-06-16 | 山西天宝集团有限公司 | Down-pressure ring rolling equipment for T-shaped wind power flange |
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Inventor after: Chen Xiaoqing Inventor after: Meng Ruibin Inventor after: Yang Yongqiang Inventor after: Gao Xiaotian Inventor after: Tang Jialang Inventor after: Guan Zhen Inventor after: Si Guizhen Inventor before: Chen Xiaoqing Inventor before: Meng Ruibin Inventor before: Yang Yongqiang Inventor before: Gao Xiaotian Inventor before: Tang Jialang Inventor before: Guan Zhen Inventor before: Si Guizhen |
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