CN103480787A - Hot forging forming die for synchronous gear rings - Google Patents
Hot forging forming die for synchronous gear rings Download PDFInfo
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- CN103480787A CN103480787A CN201310445179.7A CN201310445179A CN103480787A CN 103480787 A CN103480787 A CN 103480787A CN 201310445179 A CN201310445179 A CN 201310445179A CN 103480787 A CN103480787 A CN 103480787A
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Abstract
The invention discloses a hot forging forming die for synchronous gear rings. The hot forging forming die comprises an upper die, a core die, a lower die, a base, a jacket, a cover die, a pressure plate and a pressure head. Seam allowance for positioning and mounting the jacket is reserved on the upper end surface of the base, the lower die is axially inserted into an inner hole of the jacket, and the lower die and the jacket are jointly axially locked by the cover die on the lower die and the jacket; The upper die is perpendicularly mounted on the bottom surface of the pressure head and is integrally connected with the pressure head by the pressure plate, and the upper die and the lower die are coaxial. The core die is plugged into an inner hole of the lower die to form a concave die cavity, synchronous serrated grooves are uniformly formed in the inner wall of a port in the upper portion of the lower die, and the depth of each synchronous serrated groove is larger than the actual size of a forged piece. The diameter of a die head of the upper die is larger than the maximum outer diameter of the forged piece, and the die head of the upper die is in clearance fit with an inner hole of the cover die. The hot forging forming die has the advantages that fins can be formed at teeth and the maximum-diameter positions of the forged piece, and built-in fin channels are favorable for sufficiently filling the teeth; a die joint of the hot forging forming die is arranged on the upper end surface of the forged piece, so that the thickness and the fins of the forged piece can be increased if certain raw materials become redundant in forging and pressing procedures, the problem of die bulging can be solved, and the service life of the hot forging forming die can be prolonged advantageously.
Description
Technical field
The present invention relates to a kind of forging die structure, specifically, the present invention relates to a kind of synchronous gear ring hot forging forming mould for automobile gearbox.
Background technology
Synchronous gear ring in automobile gearbox belongs to one of gearshift parts, and its quality directly affects the driver comfort index.Synchronous gear ring is flat member, its poor rigidity, and shaping by stock removal processing is yielding, and the industry generally adopts thermal forging technology to realize being shaped in batches processing.The synchronous gear circle body is long-pending little, shape is relatively simple, and the shaping difficulty is little, the most applicable with closed-die forging realization shaping processing.Once closed-die forging forging die used is made rear die cavity internal volume, just determine, it is very large that Filling quality is affected by the blank measuring accuracy, has in the time of in production and forbidden to cause the problems such as mold filling deficiency or swollen mould because of the blank metering.On the other hand, bear forming pressure for the forging die of closed-die forging large, high to the forging die requirement of strength, so the forging die manufacture difficulty is large, cost is large.
Summary of the invention
The problem of mold filling deficiency or swollen mould easily occurs in the present invention mainly for the synchronous gear ring of the closed-die forging of prior art, the synchronous gear ring hot forging forming mould of a kind of forging with the technique overlap proposed, this forging die belongs to the closed-die forging mould, it is provided with the excessive passage of excess stock, guarantee that in mould, each filling is full, and greatly reduce required forming pressure, thereby improve the service life of forging die.
The present invention is achieved through the following technical solutions technical goal.
Synchronous gear ring hot forging forming mould, it comprises patrix, core, counterdie, base, sheath, cover mold, pressing plate and pressure head.Described base upper surface is provided with seam location and installation sheath, axially inserts counterdie in the sheath endoporus, counterdie and sheath jointly by the cover mold axial locking.The vertically arranged patrix of described pressure head bottom face is linked into an integrated entity by pressing plate, and patrix is coaxial with counterdie.Its improvements are: in the counterdie endoporus, plug cored mould forms the die cavity of indent, the synchronizing jugged groove of aperture, counterdie top inner wall even distribution, and axial synchronizing jugged groove is than the dark h=0.6mm～1.5mm of actual size.The die diameter of described patrix is greater than forging maximum outside diameter 1.0mm～1.5mm, the die head of patrix and cover mold endoporus matched in clearance, and the die joint of patrix and counterdie is in the forging upper surface.
In said structure, the synchronizing jugged groove of counterdie inner wall even distribution is downward indent along the length direction.
The present invention compared with prior art, has following good effect:
1, forging die is simple in structure, makes easily;
2, the built-in synchronous gear groove depth of forging die is longer than actual size, deepen part and vertically form overlap in forging tooth section, the die diameter of patrix is greater than the forging maximum outside diameter, is convenient to form radially overlap in the forging upper surface, and built-in overlap passage is conducive to the complete filling of tooth section;
3, the upper and lower mould die joint is reasonable, if there is redundance to increase forging thickness, does not produce swollen modulus problem.
The accompanying drawing explanation
Fig. 1 is structural profile schematic diagram of the present invention.
Fig. 2 is A place enlarged diagram in Fig. 1, shows in figure that forging die produces the structure of overlap.
Fig. 3 is the forging front view with overlap.
Fig. 4 is the synchronous gear ring finished product front view of removing overlap.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the invention will be further described.
Synchronous gear ring hot forging forming mould shown in Fig. 1 belongs to the closed-die forging mould, and it comprises patrix 1, core 2, counterdie 3, base 4, sheath 5, cover mold 6, pressing plate 7 and pressure head 8.Described base 4 is basic components, is placed on the forging equipment workbench carrying bed die parts, and upper surface is provided with seam location and installation sheath 5, axially inserts counterdie 3 in sheath 5 endoporus, counterdie 3 and sheath 5 jointly by cover mold 6 axial lockings.Described pressure head 8 is the active press member, and it is suspended on bed die.The vertically arranged patrix 1 of pressure head 8 bottom face is linked into an integrated entity by pressing plate 7, and patrix 1 is coaxial with counterdie 3.In counterdie 3 endoporus, plug cored mould 2 forms the die cavity of indent, the synchronizing jugged groove of counterdie 3 aperture, top inner wall even distribution, and axial synchronizing jugged groove is darker than actual size.The present embodiment forging 9 is the synchronous gear rings of car, and its specification less than the dark 0.6mm of actual size, is deepened following wind step serrate slot length direction downward indent in position at the synchronizing jugged groove of counterdie 3 inner wall even distributions.This structure makes the tooth section on forging 9 have vertical overlap.The die diameter of described patrix 1 is greater than forging 9 maximum outside diameters, and in the present embodiment, difference is 1.0mm.Because patrix in the present invention 1 and the die joint of counterdie 3 are located at forging 9 upper surfaces, form herein radially overlap during forging.Built-in overlap passage is conducive to tooth section and fully tamps.The die head of patrix 1 is cylinder, executes die head and cover mold 6 endoporus matched in clearance while forging.The die joint of this mould is located at forging 9 upper surfaces, if its good effect is to have redundance to be used for increasing thickness and the overlap of forging 9 in the forging and stamping process, does not produce swollen modulus problem, is conducive to improve Service Life of Forging Die.
If in the present invention, forging 9 specifications are large, to deepen the synchronizing jugged groove depth of counterdie 3 inner wall even distributions, strengthen the maximum 1.5mm of overlap radial dimension, otherwise strengthen follow-up amount of machining, also cause waste of material.
Claims (2)
1. a synchronous gear ring hot forging forming mould, it comprises patrix (1), core (2), counterdie (3), base (4), sheath (5), cover mold (6), pressing plate (7) and pressure head (8); Described base (4) upper surface is provided with seam location and installation sheath (5), axially inserts counterdie (3) in sheath (5) endoporus, counterdie (3) and sheath (5) common by cover mold (6) axial locking; The vertically arranged patrix of described pressure head (8) bottom face (1) is linked into an integrated entity by pressing plate (7), and patrix (1) is coaxial with counterdie (3); It is characterized in that: in counterdie (3) endoporus, plug cored mould (2) forms the die cavity of indent, the synchronizing jugged groove of counterdie (3) aperture, top inner wall even distribution, and axial synchronizing jugged groove is than the dark h=0.6mm～1.5mm of actual size; The die diameter of described patrix (1) is greater than forging (9) maximum outside diameter 1.0mm～1.5mm, the die head of patrix (1) and cover mold (6) endoporus matched in clearance, and the die joint of patrix (1) and counterdie (3) is in forging (9) upper surface.
2. synchronous gear ring hot forging forming mould according to claim 1 is characterized in that: the synchronizing jugged groove of described counterdie (3) inner wall even distribution is indent downwards along the length direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310445179.7A CN103480787A (en) | 2013-09-27 | 2013-09-27 | Hot forging forming die for synchronous gear rings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310445179.7A CN103480787A (en) | 2013-09-27 | 2013-09-27 | Hot forging forming die for synchronous gear rings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103480787A true CN103480787A (en) | 2014-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310445179.7A Pending CN103480787A (en) | 2013-09-27 | 2013-09-27 | Hot forging forming die for synchronous gear rings |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816138A (en) * | 2015-04-03 | 2015-08-05 | 西安建筑科技大学 | Small-modulus thin-wall gear ring warm stamp forging forming process |
| CN105057556A (en) * | 2015-08-14 | 2015-11-18 | 浙江五洲新春集团股份有限公司 | Forging molding process of bearing ring |
| CN110193582A (en) * | 2019-06-19 | 2019-09-03 | 重庆巨泰机械有限公司 | A kind of openable and closable floating die assembly |
Citations (9)
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| JPS6343738A (en) * | 1986-08-08 | 1988-02-24 | Kobe Steel Ltd | Precision die forging method for annular part |
| JPH11138232A (en) * | 1997-11-06 | 1999-05-25 | Toyota Motor Corp | Forging method of gear and gear forging method for correcting phase shift |
| JP3666381B2 (en) * | 2000-11-01 | 2005-06-29 | 愛知製鋼株式会社 | Manufacturing method of tooth profile forging member |
| CN201102054Y (en) * | 2007-09-24 | 2008-08-20 | 重庆大学 | Mold of finish forging angular wheel applied in single action press |
| CN101301674A (en) * | 2008-06-26 | 2008-11-12 | 上海保捷汽车零部件锻压有限公司 | Drop dies with movable bush fitting |
| CN102151711A (en) * | 2010-12-15 | 2011-08-17 | 江苏太平洋精锻科技股份有限公司 | Upper die anti-cracking structure of closed type cold extrusion planetary gear die |
| JP2012000625A (en) * | 2010-06-15 | 2012-01-05 | Daido Steel Co Ltd | Mandrel for manufacturing internal gear, and method and device for manufacturing internal gear using the mandrel |
| CN202943205U (en) * | 2012-10-19 | 2013-05-22 | 如皋市大生线路器材有限公司 | Supporting column flange once-forging molding die for transformer substation |
| CN203526436U (en) * | 2013-09-27 | 2014-04-09 | 江苏太平洋精锻科技股份有限公司 | Synchronous gear ring hot-forging die |
-
2013
- 2013-09-27 CN CN201310445179.7A patent/CN103480787A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6343738A (en) * | 1986-08-08 | 1988-02-24 | Kobe Steel Ltd | Precision die forging method for annular part |
| JPH11138232A (en) * | 1997-11-06 | 1999-05-25 | Toyota Motor Corp | Forging method of gear and gear forging method for correcting phase shift |
| JP3666381B2 (en) * | 2000-11-01 | 2005-06-29 | 愛知製鋼株式会社 | Manufacturing method of tooth profile forging member |
| CN201102054Y (en) * | 2007-09-24 | 2008-08-20 | 重庆大学 | Mold of finish forging angular wheel applied in single action press |
| CN101301674A (en) * | 2008-06-26 | 2008-11-12 | 上海保捷汽车零部件锻压有限公司 | Drop dies with movable bush fitting |
| JP2012000625A (en) * | 2010-06-15 | 2012-01-05 | Daido Steel Co Ltd | Mandrel for manufacturing internal gear, and method and device for manufacturing internal gear using the mandrel |
| CN102151711A (en) * | 2010-12-15 | 2011-08-17 | 江苏太平洋精锻科技股份有限公司 | Upper die anti-cracking structure of closed type cold extrusion planetary gear die |
| CN202943205U (en) * | 2012-10-19 | 2013-05-22 | 如皋市大生线路器材有限公司 | Supporting column flange once-forging molding die for transformer substation |
| CN203526436U (en) * | 2013-09-27 | 2014-04-09 | 江苏太平洋精锻科技股份有限公司 | Synchronous gear ring hot-forging die |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816138A (en) * | 2015-04-03 | 2015-08-05 | 西安建筑科技大学 | Small-modulus thin-wall gear ring warm stamp forging forming process |
| CN105057556A (en) * | 2015-08-14 | 2015-11-18 | 浙江五洲新春集团股份有限公司 | Forging molding process of bearing ring |
| CN110193582A (en) * | 2019-06-19 | 2019-09-03 | 重庆巨泰机械有限公司 | A kind of openable and closable floating die assembly |
| CN110193582B (en) * | 2019-06-19 | 2022-02-25 | 重庆巨泰机械有限公司 | Floating die capable of opening and closing |
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Application publication date: 20140101 |