CN114178459B - Forming method and die for stainless steel large taper ring with flange - Google Patents
Forming method and die for stainless steel large taper ring with flange Download PDFInfo
- Publication number
- CN114178459B CN114178459B CN202111484249.0A CN202111484249A CN114178459B CN 114178459 B CN114178459 B CN 114178459B CN 202111484249 A CN202111484249 A CN 202111484249A CN 114178459 B CN114178459 B CN 114178459B
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- forming
- ring
- taper
- die
- punch
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 29
- 239000010935 stainless steel Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005242 forging Methods 0.000 claims abstract description 63
- 238000000465 moulding Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Classifications
-
- 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
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/08—Accessories for handling work or tools
Abstract
The application relates to the technical field of forging and forming of aviation annular forgings, and particularly discloses a forming method and a die of a large-taper stainless steel ring with a flange, comprising the following steps: preparation: preparing a molding die, a pre-breaking inclined punch, a molding punch, a rectangular ring blank, a die heightening snap ring and a molding compression ring in advance; pre-oblique breaking: extruding the rectangular ring blank by using a moulding bed, a hydraulic press and a pre-breaking inclined punch; secondary oblique breaking: a clamping ring is added to the upper end of the die, and a rectangular ring blank is extruded by the die, a hydraulic press and a pre-breaking inclined punch; and (3) flange forming: and placing the molding press ring at the upper end of the rectangular ring blank, extruding the molding press ring by using a hydraulic press and a molding punch, and extruding the upper end of the rectangular ring blank by using the molding press ring to finally obtain the large taper ring piece with the flange. The purpose of this patent is to solve the blank height of the flange department of tapering not less than 30 flange forging and cross the bed die height, leads to unable problem of gathering the material successfully.
Description
Technical Field
The invention relates to the technical field of forging and forming of aviation annular forgings, in particular to a method and a die for forming a large taper stainless steel ring with a flange.
Background
The large taper ring forging is a taper ring forging with different upper and lower diameters and different wall thicknesses. The rolling forming is difficult to realize for the annular forging with the taper of more than 30 degrees due to the horizontal limitation of annular forging cerclage technology and cerclage equipment in the current industry.
In general, a common small-taper (the taper is less than or equal to 20 ℃) annular forging forming mode is shown in an attached drawing 1 and an attached drawing 2 of the specification, a rectangular annular blank which is completed by blank making is placed in a forming die, a forming punch is placed in the rectangular annular blank, and the integral forming of the small-taper forging is realized by utilizing the downward pressure of a hydraulic press.
The operation steps are as follows:
(1) designing a proper tire mold and a proper forming punch through the final forming size of the small taper annular forging;
(2) designing a rectangular annular forging through the final formed size of the small taper annular forging;
(3) and the pressure drop rectangular forging piece of the hydraulic machine is pressed between the forming punch and the forming die by utilizing the forming die and the forming punch, so that a closed space is formed, blanks are filled, and forming of the small-taper annular forging piece forming die is realized.
The method is suitable for forming the annular forging with small taper (the taper is less than or equal to 20 ℃), but for the forging with large taper (the taper is more than or equal to 30 ℃) and large flange, as the taper is too large and the forging has deformation resistance, the temperature of the forging can be gradually reduced along with the increase of time in the forging process, the deformation resistance of the forging can be increased, if the temperature of the forging is excessively reduced, the forgeable forging can be cracked or blocked by forced forging at the moment, so that the forgeable forging must be carried out twice, one-step forming cannot be carried out, and the blank height at the flange is over the height of a tire mold due to the too large taper, so that successful gathering cannot be carried out; in addition, the flange is difficult to mold.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method and a die for forming a large-taper stainless steel ring with a flange, and solves the problem that the blank height at the flange of a flange forging with the taper of more than or equal to 30 degrees exceeds the height of a forming die, so that successful material aggregation is not realized.
In order to solve the problems, the invention adopts the following technical scheme: a method and a die for forming a large taper ring piece of stainless steel with a flange comprise the following steps:
preparation: designing a proper forming tire mold, a pre-snapping oblique punch, a forming punch, a rectangular ring blank, a tire mold heightening snap ring and a forming compression ring according to the final forming size of the large-taper annular forging;
pre-oblique breaking: after the tire mold is fixed, placing the rectangular ring blank in the tire mold, and extruding the rectangular ring blank by utilizing a hydraulic press and a pre-oblique breaking punch to realize pre-oblique breaking of the tire mold of the rectangular ring blank;
secondary oblique breaking: fixing a heightened clamping ring of a tire mold at the upper end of the tire mold, placing a rectangular ring blank in the tire mold, and extruding the rectangular ring blank by using a forming punch and a hydraulic press to realize oblique breaking of the rectangular ring blank tire mold; if the annular forging piece can reach the required taper after the secondary oblique breaking, the flange forming process is carried out, if the annular forging piece does not reach the required taper after the secondary oblique breaking, the secondary oblique breaking process is repeated for 1-3 times until the annular forging piece reaches the required taper, and the flange forming process is carried out;
and (3) flange forming: and removing the clamping ring and the punch heightening ring of the die, placing the forming compression ring at the upper end of the rectangular ring blank, extruding the forming compression ring by utilizing a hydraulic press and the forming punch, and extruding the upper end of the rectangular ring blank by utilizing the forming compression ring to finally obtain the large taper ring piece with the flange.
Further, the angle of pre-oblique breaking is 1-25 degrees.
Further, the secondary oblique angle is 1-45 degrees.
Further, the cross section of the tire mold heightening snap ring is L-shaped.
Further, the rectangular ring blank is made of 1Cr11Ni2W2MoV.
A stainless steel large taper ring piece forming die with a flange comprises a forming die, a pre-snapping inclined punch, a forming punch, a die heightening snap ring and a forming compression ring; a cavity matched with the outer side wall of the flanged stainless steel large taper ring piece is arranged in the tire mold, and the tire mold heightening snap ring is a stainless steel circular ring; the dimension of the clamping ring for heightening the tire mold is matched with that of the stainless steel large taper ring piece with the flange; the shapes of the pre-breaking inclined punch and the forming punch are matched with the inner side wall of the stainless steel large taper ring with the flange.
Further, the inclined plane angle of the oblique breaking punch is 1-25 degrees.
Further, the inclined plane angle of the forming punch is 1-45 degrees.
The beneficial effect that this scheme produced is: if the existing common forming mode of the annular forging with small taper (less than or equal to 20 degrees) is used for processing the annular forging with large taper (more than or equal to 30 degrees), the blank height at the flange is too large to exceed the height of the die, so that materials cannot be successfully gathered, the large-taper annular forging in the scheme is made of 1Cr11Ni2W2MoV, is limited by plasticity and deformation resistance of the materials, fire forming cannot be achieved, the taper is divided into 2-4 times of oblique breaking, large-taper forming is achieved, blank gathering is achieved through setting up the die and heightening a clamping ring, and after taper forming, a forming compression ring is placed at the upper end of a rectangular annular blank, so that extrusion forming of a flange end is achieved.
Drawings
FIG. 1 is a schematic view of a small taper annular forging before forming a tire mold.
FIG. 2 is a schematic view of a small taper annular forging after forming.
FIG. 3 is a schematic diagram of a large taper flanged casing forging of 1Cr11Ni2W2MoV material.
FIG. 4 is a schematic diagram of a pre-break inclined structure of a large-taper annular forging.
FIG. 5 is a schematic diagram of a conventional oblique breaking structure of a small-taper annular forging.
FIG. 6 is a schematic diagram of a secondary oblique breaking structure of a large-taper annular forging
FIG. 7 is a schematic diagram of a large taper annular forging forming structure.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the hydraulic press comprises an upper anvil 1, a forming punch 2, a rectangular ring blank 3, a forming tire mould 4, a pre-breaking oblique punch 11, a tire mould heightening snap ring 6 and a forming compression ring 7.
An example is substantially as shown in figures 1 to 7:
the forming mode of the common small-taper (the taper is less than or equal to 20 ℃) annular forging is shown in the accompanying drawings 1 and 2; the structure of the formed 1Cr11Ni2W2MoV material large taper flanged casing forging is shown in figure 2.
A method for forming a large taper ring piece of stainless steel with a flange comprises the following steps:
preparation: calculating and designing a proper forming die, a pre-breaking inclined punch, a forming punch, a rectangular ring blank, a die heightening snap ring and a forming compression ring according to the final forming size of the large-taper annular forging;
pre-oblique breaking: as shown in fig. 4, after the forming tire mold is fixed, a rectangular ring blank is placed in the tire mold, and the rectangular ring blank is extruded by a hydraulic press and a pre-oblique punch to realize 20 degrees of pre-oblique of the rectangular ring blank tire mold;
secondary oblique breaking: as shown in fig. 5, if a conventional oblique breaking mode is adopted for the small-taper annular forging, the blank height at the flange at the upper end of the rectangular annular blank exceeds the molding die height, so that successful material gathering cannot be achieved; therefore, as shown in fig. 6, in this embodiment, the heightening snap ring of the tire mold is fixed at the upper end of the tire mold, the cross section of the heightening snap ring of the tire mold is L-shaped, the upper end of the molding tire mold is L-shaped, and the heightening snap ring of the tire mold is reversely buckled at the upper end of the molding tire mold, so as to heighten the tire mold; placing the pre-inclined rectangular ring blank in a forming die, and extruding the rectangular ring blank by using a forming punch and a hydraulic press to realize that the die of the rectangular ring blank is inclined to 37.5 degrees;
and (3) flange forming: as shown in fig. 7, the clamping ring and the punch heightening ring are removed, the forming clamping ring is placed at the upper end of the rectangular ring blank, the forming clamping ring is extruded by a hydraulic press and the forming punch, and the forming clamping ring extrudes the upper end of the rectangular ring blank, so that the large taper ring piece with the flange is finally obtained.
The material of big tapering annular forging in this embodiment is 1Cr11Ni2W2MoV, is limited by this kind of material plasticity and deformation resistance, can't realize a fire shaping, falls into the tapering with the fingers and thumb for 2 times in this application scheme to realize big tapering shaping, through setting up the material that gathers that the blank was realized to the child mould increase snap ring, after the tapering shaping, place the shaping clamping ring at the upper end of rectangle ring blank again, realize the extrusion of flange end.
The embodiment also comprises a forming die of the stainless steel large taper ring piece with the flange, which comprises a forming die, a pre-breaking inclined punch, a forming punch, a die heightening snap ring and a forming compression ring; a cavity matched with the outer side wall of the stainless steel large taper ring piece with the flange is arranged in the tire mold, and the tire mold heightening snap ring is a stainless steel circular ring; the size of the clamping ring for heightening the clamping ring of the tire mold is matched with that of the stainless steel large taper ring piece with the flange; the appearance of the pre-oblique breaking punch and the appearance of the forming punch are matched with the inner side wall of the stainless steel large taper ring with the flange, the inclined plane angle of the oblique breaking punch is 20 degrees, and the inclined plane angle of the forming punch is 17.5 degrees.
The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (7)
1. The forming method of the large-taper annular forging of the flanged stainless steel is characterized in that the taper of the large-taper annular forging is greater than or equal to 30 degrees, and the forming method is characterized in that: the method comprises the following steps:
preparation: designing a proper forming tire mold, a pre-snapping oblique punch, a forming punch, a rectangular ring blank, a tire mold heightening snap ring and a forming compression ring according to the final forming size of the large-taper annular forging;
pre-oblique breaking: after the forming tire mold is fixed, placing the rectangular ring blank in the forming tire mold, and extruding the rectangular ring blank by utilizing a hydraulic press and a pre-oblique punch to realize pre-oblique breaking of the rectangular ring blank tire mold;
secondary oblique breaking: the method comprises the steps of fixing a clamping ring for heightening a molding die at the upper end of the molding die, setting the cross section of the clamping ring for heightening the molding die to be L-shaped, setting the upper end of the molding die to be L-shaped, reversely buckling the clamping ring for heightening the molding die, realizing blank gathering by setting the clamping ring for heightening the molding die, placing a rectangular ring blank in the molding die, and extruding the rectangular ring blank by using a molding punch and a hydraulic press to realize oblique breaking of the rectangular ring blank; if the annular forging piece can reach the required taper after the secondary oblique breaking, the flange forming process is carried out, if the annular forging piece does not reach the required taper after the secondary oblique breaking, the secondary oblique breaking process is repeated for 1-3 times until the annular forging piece reaches the required taper, and the flange forming process is carried out;
and (3) flange forming: and removing the clamping ring heightened by the tire mold, placing the molding press ring at the upper end of the rectangular ring blank, extruding the molding press ring by utilizing a hydraulic press and a molding punch, and extruding the upper end of the rectangular ring blank by the molding press ring to finally obtain the large-taper annular forging with the flange.
2. The method for forming the large-taper annular forging of the flanged stainless steel according to claim 1, wherein the method comprises the following steps of: the angle of pre-oblique breaking is 1-25 degrees.
3. The method for forming the large-taper annular forging of the flanged stainless steel according to claim 1, wherein the method comprises the following steps of: the secondary oblique angle is 1-45 degrees.
4. The method for forming the large-taper annular forging of the flanged stainless steel according to claim 1, wherein the method comprises the following steps of: the rectangular ring blank is made of 1Cr11Ni2W2MoV.
5. A flanged stainless steel large-taper annular forging forming die, which is used for the flanged stainless steel large-taper annular forging forming method according to any one of claims 1-4, and is characterized in that: the device comprises a molding die, a pre-breaking inclined punch, a molding punch, a die heightening snap ring and a molding compression ring; a cavity matched with the outer side wall of the flanged stainless steel large-taper annular forging is formed in the forming die, and the die heightening snap ring is a stainless steel circular ring; the size of the clamping ring for heightening the tire mold is matched with that of the flanged stainless steel large-taper annular forging; the shapes of the pre-breaking inclined punch and the forming punch are matched with the inner side wall of the flanged stainless steel large-taper annular forging.
6. The flanged stainless steel large-taper annular forging forming die as set forth in claim 5, wherein: the inclined plane angle of the pre-breaking inclined punch is 1-25 degrees.
7. The flanged stainless steel large-taper annular forging forming die as set forth in claim 5, wherein: the inclined plane angle of the forming punch is 1-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111484249.0A CN114178459B (en) | 2021-12-07 | 2021-12-07 | Forming method and die for stainless steel large taper ring with flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111484249.0A CN114178459B (en) | 2021-12-07 | 2021-12-07 | Forming method and die for stainless steel large taper ring with flange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114178459A CN114178459A (en) | 2022-03-15 |
| CN114178459B true CN114178459B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111484249.0A Active CN114178459B (en) | 2021-12-07 | 2021-12-07 | Forming method and die for stainless steel large taper ring with flange |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11244985A (en) * | 1998-03-04 | 1999-09-14 | Ntn Corp | Blank for forming bearing preform |
| CN202701259U (en) * | 2012-06-21 | 2013-01-30 | 西安陕鼓动力股份有限公司 | Forging tool of large-scale disk part provided with steps |
| CN103447767A (en) * | 2013-08-27 | 2013-12-18 | 贵州安大航空锻造有限责任公司 | Preparing method of G10CrNi3Mo bearing steel large-scale special-shaped cross section annular blank |
| KR101433675B1 (en) * | 2013-11-07 | 2014-08-27 | 한국기계연구원 | The cold forging mold for manufacturing under driver brake piston |
| CN108213316A (en) * | 2016-12-14 | 2018-06-29 | 贵州航宇科技发展股份有限公司 | 2219 aluminium alloy big-taper-angle taper shape ring forging manufacturing methods |
| CN108637151A (en) * | 2018-03-17 | 2018-10-12 | 中北大学 | A kind of lightweight special-shaped shell body partial plastic forming method |
| CN111922654A (en) * | 2020-07-23 | 2020-11-13 | 贵州航宇科技发展股份有限公司 | Preparation method of GH4169 alloy special-shaped ring blank with flange and forming die thereof |
| CN112916783A (en) * | 2021-02-07 | 2021-06-08 | 哈尔滨工业大学 | Plate forging forming die device with local hole thickening characteristic and technological method |
| CN113059100A (en) * | 2021-03-25 | 2021-07-02 | 武汉理工大学 | Near-net composite forming method for large-sized wall thickness mutation ring piece |
| CN113649508A (en) * | 2021-07-29 | 2021-11-16 | 武汉理工大学 | Method for forming bowl-shaped casing ring blank by using small-tonnage press |
-
2021
- 2021-12-07 CN CN202111484249.0A patent/CN114178459B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11244985A (en) * | 1998-03-04 | 1999-09-14 | Ntn Corp | Blank for forming bearing preform |
| CN202701259U (en) * | 2012-06-21 | 2013-01-30 | 西安陕鼓动力股份有限公司 | Forging tool of large-scale disk part provided with steps |
| CN103447767A (en) * | 2013-08-27 | 2013-12-18 | 贵州安大航空锻造有限责任公司 | Preparing method of G10CrNi3Mo bearing steel large-scale special-shaped cross section annular blank |
| KR101433675B1 (en) * | 2013-11-07 | 2014-08-27 | 한국기계연구원 | The cold forging mold for manufacturing under driver brake piston |
| CN108213316A (en) * | 2016-12-14 | 2018-06-29 | 贵州航宇科技发展股份有限公司 | 2219 aluminium alloy big-taper-angle taper shape ring forging manufacturing methods |
| CN108637151A (en) * | 2018-03-17 | 2018-10-12 | 中北大学 | A kind of lightweight special-shaped shell body partial plastic forming method |
| CN111922654A (en) * | 2020-07-23 | 2020-11-13 | 贵州航宇科技发展股份有限公司 | Preparation method of GH4169 alloy special-shaped ring blank with flange and forming die thereof |
| CN112916783A (en) * | 2021-02-07 | 2021-06-08 | 哈尔滨工业大学 | Plate forging forming die device with local hole thickening characteristic and technological method |
| CN113059100A (en) * | 2021-03-25 | 2021-07-02 | 武汉理工大学 | Near-net composite forming method for large-sized wall thickness mutation ring piece |
| CN113649508A (en) * | 2021-07-29 | 2021-11-16 | 武汉理工大学 | Method for forming bowl-shaped casing ring blank by using small-tonnage press |
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| Publication number | Publication date |
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| CN114178459A (en) | 2022-03-15 |
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