CN102179469B - Train wheel preforming method for reducing forging pressure - Google Patents
Train wheel preforming method for reducing forging pressure Download PDFInfo
- Publication number
- CN102179469B CN102179469B CN201110000109A CN201110000109A CN102179469B CN 102179469 B CN102179469 B CN 102179469B CN 201110000109 A CN201110000109 A CN 201110000109A CN 201110000109 A CN201110000109 A CN 201110000109A CN 102179469 B CN102179469 B CN 102179469B
- Authority
- CN
- China
- Prior art keywords
- wheel
- forging
- counterdie
- modular ring
- finisher
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Forging (AREA)
Abstract
The invention provides a train wheel preforming method for reducing forging pressure, belonging to the technical field of hot forming of wheel-shaped forge pieces. In the train wheel preforming method, by using a lower mould of a special structure, the traditional preforming finish forging is completed through the following two steps: step 1: removing an outer mould ring and an inner mould ring which are positioned on the lower mould, wherein rim and hub positions can not be filled when an upper mould downwards presses to press the thickness of a radial plate to a target value; and step 2: respectively placing the outer mould ring and the inner mould ring on the outer table surface and the inner table surface of the lower mould, wherein rim and hub cavities are filled to complete the preforming of wheels at the moment when the upper mould downwards presses to press a rim and a hub to target height values. With the train wheel preforming method, the forging pressure is outstandingly reduced, therefore a wheel blank with a larger diameter can be forged under the precondition that the capacity of a press machine is limited; the forging pressure is reduced, therefore, the forging temperature of a blank can be appropriately reduced, energy saving and consumption reduction are achieved and the structure property of the wheel-shaped forge pieces is improved; and after the forging pressure is reduced, the elastic deformation of equipment is reduced, therefore the dimensional accuracy of the wheel-shaped forge pieces is further enhanced.
Description
Technical field:
The invention belongs to wheel shape forging hot forming technical field, be specifically related to a kind of train wheel preliminary shaping method that reduces forging force.
Background technology:
Roll over the shaping of steel train wheel and mainly comprise die forging preform and two operations of the rolling hole enlargement of wheel rim.Preform is accomplished the main deflection that wheel is shaped, and forges and two work steps of finish-forging at the beginning of preform often divides.The die cavity full condition of preform finish-forging is directly connected to the forming quality of wheel.And the full condition of die cavity is decided by the tonnage of preform forcing press to a great extent.There is following problem in the preform of wheel at present:
The first, first forging stock once-forming between upper die and lower die is accomplished finish-forging.Finish-forging faces when finishing, because wheel rim and wheel hub are full of basically, metal flow receives the mould strong restrictions, and forging force sharply rises.Existing forcing press will be because the restriction of tonnage to the strict restriction of existence on the diameter of wheel preform, can't be accomplished preform above the wheel of certain size;
The second, in the practical operation because the interference of various factors for the preform that guarantees large-size can be full of die cavity, often improves the heating-up temperature of blank, have in addition be heated to more than 1250 ℃, to reduce the metal deformation drag.And the heating-up temperature energy that improved serious waste.
The 3rd, consider from the structure property of forging, should reduce forging temperature, and the reduction of temperature, forging pressure rises, and often makes existing forcing press can't accomplish the preform of wheel.When even press tonnage can satisfy,, cause the strain of mould and press structure bigger, thereby make that the dimensional accuracy control level of forging is low because plastic force is very big.For newly making forcing press, the lifting means ability also can make manufacturing cost sharply rise significantly.
Therefore, do not improving forging temperature, guaranteeing that wheel preform die cavity is full of and to reduce the preliminary shaping method of forging force significant to the production of train wheel.
Summary of the invention:
The present invention is directed to the problem that prior art exists, a kind of train wheel preliminary shaping method that reduces forging force is provided.The core of this method is existing finish-forging to be shaped be divided into the completion of two steps, accomplishes disc and wheel rim wheel hub respectively and is shaped, to reach the purpose of remarkable reduction wheel preform forging force.
Preliminary shaping method provided by the present invention is modular ring 5 outside outside the finisher counterdie, being provided with respectively on the table top 4 in table top 3, the finisher counterdie, interior modular ring 6; The interior external diameter of outer modular ring 5, interior modular ring 6 is consistent with the interior external diameter of table top 4 in the outer table top 3 of said finisher counterdie, the finisher counterdie respectively; This method is accomplished the preform finish-forging of wheel in two steps; At first disc is pressed onto target thickness, again wheel rim and wheel hub is pressed onto object height and is full of die cavity, the concrete steps of this inventive method are following:
(1) removes outer modular ring 5, interior modular ring 6, first forging stock is placed on the finisher counterdie 2, after the centering; Finisher patrix 1 presses down, and is pressed onto target thickness to disc 8, owing to remove outer modular ring 5, interior modular ring 6; Corresponding increase wheel rim die cavity height h1 and wheel hub die cavity height h2; This moment, the bottom of wheel rim 7 and wheel hub 9 was not full of, and just because the bottom of wheel rim 7 and wheel hub 9 is not full of, disc position metal flow resistance is less; In addition, the bottom of wheel hub 9 not with counterdie in table top 4 contact or contact area very little, the contact area of table top 3 is also very little outside wheel rim 7 and the counterdie, forging force is less at this moment;
(2) outside the finisher counterdie, place outer modular ring 5, interior modular ring 6 in table top 3, the finisher counterdie on the table top 4 respectively, step (1) is forged the workpiece 10 that obtains be put on the finisher counterdie 2, finisher patrix 1 is depressed wheel rim 7 and wheel hub 9 is pressed onto object height; And wheel rim, wheel hub die cavity are full of; Obtain the wheel preform, accomplish preform, the disc position is not stressed basically in these step forging and pressing; Only be that wheel hub bottom and wheel rim are shaped, forging force significantly reduces.
Finisher counterdie of the present invention is designed to structure shown in Figure 3, and outer modular ring 5, interior modular ring 6 are set respectively on the outer table top 3 of counterdie, the interior table top 4.The inner and outer diameter of modular ring is consistent with the interior external diameter of counterdie table top 3,4 respectively, and the thickness of modular ring is 15-30mm, and die forging is fashionable up and down, guarantees that wheel rim die cavity height, wheel hub die cavity height and disc die cavity height reach wheel preform dimensional requirement.
Modular ring thickness has material impact to flow of metal in above-mentioned steps.When modular ring thickness less than 15mm, when the disc of the first step was shaped, wheel rim bottom and the counterdie contact area of table top 3 outward were excessive, it is unfavorable that forging force is reduced.When modular ring thickness during greater than 30mm, when first step disc was shaped, the wheel rim bottom can not contact with counterdie outside 3, and was unfavorable to the wheel rim flow of metal, also can improve die manufacturing cost and operation easier.
The present invention adopts such scheme, compared with prior art, obvious improvement and bigger benefit is arranged: the wheel blank that under the prerequisite of forcing press limited ability, can forge larger diameter; Because the reducing of forging force, forging temperature that can corresponding suitable reduction blank, energy-saving and cost-reducing, improve the structure property of forging; After reducing forging force, make the equipment elasticity distortion reduce, the dimensional accuracy of forging can further improve.
Description of drawings:
Fig. 1 is a wheel preform finish-forging mould structure sketch map of the present invention;
Fig. 2 is a wheel preliminary shaping method finish-forging first step workpiece deformation sketch map of the present invention;
Fig. 3 is second step of wheel preform finish-forging mould structure sketch map of the present invention;
Among the figure: 1: finisher patrix, 2: finisher counterdie, 3: the outer table top of finisher counterdie, 4: table top in the finisher counterdie, 5: outer modular ring, 6: interior modular ring, 7: wheel rim, 8: disc, 9: wheel hub, 10: workpiece.
The specific embodiment:
Preform finish-forging counterdie is designed to structure shown in Figure 3.Wheel preform finish-forging is accomplished in two steps.The first step is removed the corresponding height that has increased wheel rim die cavity and wheel hub die cavity with outer modular ring 5 on the counterdie and interior modular ring 6.First forging stock is placed into counterdie, and after the centering, patrix presses down, and web thickness is pressed onto desired value.This moment, wheel rim and wheel hub were not full of, thereby reduce the flow resistance of metal owing to the object height of die cavity height greater than wheel rim and wheel hub, and forging force reduces.In second step, behind modular ring 5 and the interior modular ring 6, the forging and pressing workpiece that will go up a step again is placed into counterdie outside outside counterdie, placing respectively on table top 3 and the interior table top 4; Patrix presses down; Wheel rim and hub height are pressed onto desired value, and metal is full of wheel rim die cavity and wheel hub die cavity, accomplishes the preform of wheel.Because second step only was out of shape wheel rim and wheel hub, so the existing relatively technology of forging force significantly reduces.
Wheel base with external diameter 910mm, hub height 200mm, wheel rim height 150mm is pre-formed into example (steel grade CL60,1200 ℃ of heating-up temperatures), forging force 77500kN during the preform finish-forging under the existing technology.Adopt the inventive method:
Outer modular ring 5, when interior modular ring 6 thickness are 15mm, first step forging force 58000kN, the second step forging force 45900kN;
Outer modular ring 5, when interior modular ring 6 thickness are 20mm, first step forging force 43600kN, the second step forging force 45800kN;
Outer modular ring 5, when interior modular ring 6 thickness are 30mm, first step forging force 41000kN, the second step forging force 45000kN.
It is thus clear that the variation through modular ring thickness is little to the forging force influence of second step, but the forging force of the first step is had considerable influence, along with modular ring thickness reduces, first step forging force obviously increases.When being 20mm for this routine modular ring thickness, the first step is slightly littler than the forging force in second step, and its second step forging force is littler by 40% than the forging force of existing technology, has significantly reduced the preformed forging force of wheel.
Claims (2)
1. train wheel preliminary shaping method that reduces forging force; This preliminary shaping method is modular ring (5) outside being provided with respectively on the table top (4) in table top outside the finisher counterdie (3), the finisher counterdie, interior modular ring (6); The interior external diameter of said outer modular ring (5), interior modular ring (6) is consistent with the interior external diameter of table top (4) in the outer table top (3) of said finisher counterdie, the finisher counterdie respectively; This method is accomplished the preform finish-forging of wheel in two steps; At first disc is pressed onto target thickness, again wheel rim and wheel hub is pressed onto object height and is full of die cavity, the concrete steps of this method are following:
(1) removes said outer modular ring (5), interior modular ring (6), first forging stock is placed on the finisher counterdie (2), after the centering; Finisher patrix (1) presses down, and is pressed onto target thickness to disc (8), owing to remove outer modular ring (5), interior modular ring (6); Corresponding increase wheel rim die cavity height (h1) and wheel hub die cavity height (h2); This moment, the bottom of wheel rim (7) and wheel hub (9) was not full of, and just because the bottom of wheel rim (7) and wheel hub (9) is not full of, disc position metal flow resistance is less; In addition, the bottom of wheel hub (9) not with counterdie in table top (4) contact or contact area very little, wheel rim (7) and the counterdie contact area of table top (3) outward are also very little, so forging force is less;
(2) outside said finisher counterdie, place respectively on the table top (4) in table top (3), the finisher counterdie outside modular ring (5), interior modular ring (6); Step (1) is forged the workpiece (10) obtain be put on the finisher counterdie (2), finisher patrix (1) is depressed wheel rim (7) and wheel hub (9) is pressed onto object height, and wheel rim, wheel hub die cavity are full of; Obtain the wheel preform; Accomplish the wheel preform, the disc position is not stressed basically in these step forging and pressing, only is that wheel hub bottom and wheel rim are shaped.
2. the described train wheel preliminary shaping method that reduces forging force of claim 1 is characterized in that the thickness of described outer modular ring (5), interior modular ring (6) is 15-30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110000109A CN102179469B (en) | 2011-01-04 | 2011-01-04 | Train wheel preforming method for reducing forging pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110000109A CN102179469B (en) | 2011-01-04 | 2011-01-04 | Train wheel preforming method for reducing forging pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102179469A CN102179469A (en) | 2011-09-14 |
| CN102179469B true CN102179469B (en) | 2012-09-05 |
Family
ID=44565862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110000109A Expired - Fee Related CN102179469B (en) | 2011-01-04 | 2011-01-04 | Train wheel preforming method for reducing forging pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102179469B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391968A (en) * | 2016-11-23 | 2017-02-15 | 马鞍山钢铁股份有限公司 | Swage forging forming mechanism for train wheels, press comprising mechanism and assembling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU448912A1 (en) * | 1972-12-25 | 1974-11-05 | Институт черной металлургии | Method for the production of all-rolled railway wheels |
| SU718212A1 (en) * | 1978-09-05 | 1980-02-29 | Институт черной металлургии | Method of manufacturing railway wheels |
| RU2070465C1 (en) * | 1994-10-06 | 1996-12-20 | АО Выксунский металлургический завод | Method of railway wheels production |
| CN1946497A (en) * | 2004-05-10 | 2007-04-11 | 张新颖 | Cast forging process for aluminum wheels |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4333944A1 (en) * | 1993-10-06 | 1995-04-13 | Pahnke Eng Gmbh & Co Kg | Method and apparatus for the production of a wheel, especially a train wheel, which is preferably preformed |
| JP3562297B2 (en) * | 1998-03-16 | 2004-09-08 | 三菱自動車工業株式会社 | Forging die equipment |
-
2011
- 2011-01-04 CN CN201110000109A patent/CN102179469B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU448912A1 (en) * | 1972-12-25 | 1974-11-05 | Институт черной металлургии | Method for the production of all-rolled railway wheels |
| SU718212A1 (en) * | 1978-09-05 | 1980-02-29 | Институт черной металлургии | Method of manufacturing railway wheels |
| RU2070465C1 (en) * | 1994-10-06 | 1996-12-20 | АО Выксунский металлургический завод | Method of railway wheels production |
| CN1946497A (en) * | 2004-05-10 | 2007-04-11 | 张新颖 | Cast forging process for aluminum wheels |
Non-Patent Citations (1)
| Title |
|---|
| 侯沛云,等.数值模拟技术在火车轮热成形工艺设计中的应用.《锻压装备与制造技术》.2009,(第3期), * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102179469A (en) | 2011-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104439027B (en) | Transmission shaft fork axle new technique for forging | |
| CN204396767U (en) | Bullet train wheel forging and molding mold | |
| CN104139279B (en) | The manufacturing process of interior trapezoidal grooved ring shape part | |
| CN101658888B (en) | Method for manufacturing alligatoring ring matrix with novel structure | |
| CN104139280B (en) | The manufacturing process of hub for vehicle wheel | |
| CN101402163A (en) | Bearing ferrule workblank triple external member smithing and molding process | |
| CN101758149B (en) | Rotator shaft residual material-free obliquely and transversely rolling method and special mold | |
| CN104191181A (en) | Magnesium alloy wheel forging-spinning composite forming method | |
| CN102172734B (en) | Rolling blank making method for automobile transmission gear ring | |
| CN202343760U (en) | High-pressure elbow forming die | |
| CN201596742U (en) | Integrated forging die for automobile knuckles | |
| CN202239430U (en) | Die for forging magnesium alloy automobile hub | |
| CN204276770U (en) | Transmission shaft fork axle blanking mold | |
| CN106925700B (en) | A kind of aluminum-alloy wheel larger ratio of height to diameter forging forming method | |
| CN102179469B (en) | Train wheel preforming method for reducing forging pressure | |
| CN102114519B (en) | Method for performing wheel of train | |
| CN102847862A (en) | Low-pressure composite forging process for bearing ring | |
| CN204747242U (en) | Rim becomes major part mould | |
| CN107671217A (en) | A kind of flanged ball valve valve body forging forming method and its base mould of use | |
| CN110193572A (en) | The manufacturing method of double S type web wheel press shaping die devices and double S type web wheels | |
| CN102179463B (en) | Blank-making rolling method for conical hub of automotive transmission | |
| CN203330322U (en) | Die parting device based on flange type forging and optimizing die forging force | |
| CN201592226U (en) | Special die for non-scrap cross wedge rolling of revolving shafts | |
| CN202343841U (en) | Precision forging and forming die for blank of differential case | |
| CN101716646B (en) | Tool for forging special-shape ring for flange |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20150104 |
|
| EXPY | Termination of patent right or utility model |