CN112275980A - Gear shaft precision machining method and gear shaft mold used in same - Google Patents
Gear shaft precision machining method and gear shaft mold used in same Download PDFInfo
- Publication number
- CN112275980A CN112275980A CN202011084656.8A CN202011084656A CN112275980A CN 112275980 A CN112275980 A CN 112275980A CN 202011084656 A CN202011084656 A CN 202011084656A CN 112275980 A CN112275980 A CN 112275980A
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- cavity
- gear shaft
- tooth
- shaft
- shaped
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Classifications
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- 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
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- 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
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/12—Making machine elements axles or shafts of specially-shaped cross-section
Abstract
The invention discloses a gear shaft precision processing method and a gear shaft mould used in the method, comprising a lower mould, wherein one end surface of the lower mould is provided with a round hole cavity, the bottom of the round hole cavity is provided with a tooth-shaped cavity, the center of the bottom of the tooth-shaped cavity is provided with a shaft cavity, the connecting position of the shaft cavity and the tooth-shaped cavity is provided with a round hole cavity, the side surface of the other end of the round hole cavity is connected with an upper mould in a sliding way, one end surface of the upper mould is provided with a conical groove, the center of the conical groove is fixedly connected with a cylindrical head, the lower mould is connected with the upper mould, a bar can be directly subjected to hot forging and forming, the precision of the tooth-shaped part and a wheel shaft is further ensured, the subsequent finish machining of the tooth shape is facilitated, the efficiency is effectively improved, and the conical head is forged and formed, and the processing efficiency and precision are ensured.
Description
Technical Field
The invention relates to the field of gear shafts, in particular to a gear shaft precision machining method and a gear shaft mold used in the method.
Background
In mechanical transmission parts, the gear shaft is very commonly used, the gear and the shaft body can be integrally processed, subsequent installation and transmission are facilitated, and most of common modes are die forging.
However, most of the existing gear shaft die forging modes are that a bar structure is forged, and then gear hobbing is carried out, and due to the low gear hobbing efficiency, the forming time on the bar is long, the processing efficiency is greatly reduced, the centers of a tooth-shaped part and a wheel shaft can be influenced, the processing is not facilitated, and the existing die is not favorable for demolding, influences the use and needs to be improved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a gear shaft precision machining method and a gear shaft mold used in the method, wherein the upper mold is connected with the lower mold, so that a bar can be directly subjected to hot forging and forming, the precision of a tooth-shaped part and a wheel shaft is further ensured, the subsequent finish machining of the tooth shape is facilitated, the efficiency is effectively improved, and meanwhile, a conical head is forged and formed by combining a conical groove, so that the demolding and the subsequent clamping and positioning are facilitated, the convenience and the stability in use can be greatly improved, and the machining efficiency and the precision are ensured.
In order to solve the above problems, the present invention adopts the following technical solutions.
A gear shaft precision processing method and a gear shaft mould used in the method comprise a lower mould, wherein a round hole cavity is arranged on one end surface of the lower mould, a tooth-shaped cavity is arranged at the bottom of the round hole cavity, a shaft cavity is arranged at the center of the bottom of the tooth-shaped cavity, a round arc cavity is arranged at the connecting position of the shaft cavity and the tooth-shaped cavity, an upper mould is connected to the side surface of the other end of the round hole cavity in a sliding manner, a tapered groove is arranged on one end surface of the upper mould, and a cylindrical head is fixedly connected to the center of the tapered groove;
the processing method comprises the following steps:
s1, selecting a 20CrMoTi material, and roughly forging to form a bar stock, wherein the diameter is the diameter of the tooth-shaped part, and the tolerance is +8mm to +12 mm;
s2, preheating the bar stock to 200-250 ℃, preserving heat for 10-15 minutes, and then heating to 800-950 ℃;
s3, inserting the heated bar into the round hole cavity, and pushing the upper die to perform downward pressing forging in a reciprocating mode;
s4, forging and deforming the bar stock, enabling the bar stock to enter a shaft cavity, a circular arc cavity and a tooth-shaped cavity, and forming;
s5, enabling the material at the other end to enter a tapered groove for forming, and forming a tapered head and a positioning hole;
and S6, after cooling and shaping, tapping the inside of the shaping hole, connecting the lifting ring, pulling out the gear shaft, and demolding to finish the processing of the gear shaft.
Furthermore, the side surface of the shaft cavity is forged to form a wheel shaft, an arc part is arranged on the side surface of one end of the wheel shaft, the wheel shaft is forged and formed in the shaft cavity, and the wheel shaft is integrally machined, efficient and stable.
Furthermore, the other end of the arc part is fixedly connected with a tooth-shaped part, the surface of the tooth-shaped part is positioned on the side surface of the tooth-shaped cavity, and the tooth-shaped part is formed by forging the tooth-shaped cavity, so that the tooth-shaped part can be integrally machined, the position precision is ensured, and the production efficiency is improved.
Furthermore, the center of the surface of the other end of the tooth-shaped part is provided with a conical head, the surface of the conical head is positioned on the side surface of the conical groove, the conical head is formed by forging the conical groove, the positioning and clamping during later-stage processing are facilitated, and the precision and the stability are improved.
Furthermore, the other end surface of conical head is equipped with the locating hole, the side of locating hole cup joints in the surface of cylinder head, forms the locating hole through forging, does benefit to the tapping and connects rings, makes things convenient for the drawing of patterns, and is safe high-efficient.
Furthermore, the other end fixed surface of the upper die is connected with an installation rod, one end of the side surface of the lower die is fixedly connected with an installation plate, and the installation rod and the installation plate are connected to facilitate split installation and fixation and guarantee use safety.
Furthermore, the upper die is connected to the side face of the round hole cavity in a sliding mode, and the clearance tolerance is-0.05 mm to-0.02 mm.
Compared with the prior art, the invention has the advantages that:
(1) this scheme passes through the bed die and connects the upper die, can directly carry out hot forging and pressing shaping to the bar, and then guarantees the precision of profile of tooth portion and shaft, does benefit to follow-up finish machining profile of tooth, effectively raises the efficiency, combines the bell groove to forge shaping cone simultaneously, makes things convenient for drawing of patterns and follow-up dress card location.
(2) The wheel shaft is formed by forging in the shaft cavity, and the integrated processing is efficient and stable.
(3) The tooth-shaped part is formed by forging the tooth-shaped cavity, so that the integrated processing can be realized, the position precision is ensured, and the production efficiency is improved.
(4) The tooth-shaped part is formed by forging the tooth-shaped cavity, so that the integrated processing can be realized, the position precision is ensured, and the production efficiency is improved.
(5) Form the locating hole through forging, do benefit to the tapping and connect rings, make things convenient for the drawing of patterns, it is safe high-efficient.
(6) Through connecting installation pole and mounting panel, do benefit to the components of a whole that can function independently installation fixed, guarantee the safety in utilization.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of a lower die of the present invention;
fig. 3 is a schematic cross-sectional view of an upper mold of the present invention.
The reference numbers in the figures illustrate:
1 lower die, 11 circular hole cavity, 12 tooth-shaped cavity, 13 shaft cavity, 14 circular arc cavity, 15 upper die, 16 conical groove, 17 cylindrical head, 2 wheel shaft, 21 circular arc part, 22 tooth-shaped part, 23 conical head, 24 positioning hole, 25 mounting rod and 26 mounting plate.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
Referring to fig. 1-3, a gear shaft precision machining method and a gear shaft mold used in the method include a lower mold 1, and referring to fig. 2 and 3, a circular hole cavity 11 is arranged on one end surface of the lower mold 1, a tooth-shaped cavity 12 is arranged at the bottom of the circular hole cavity 11, a shaft cavity 13 is arranged at the center of the bottom of the tooth-shaped cavity 12, a circular arc cavity 14 is arranged at the connecting position of the shaft cavity 13 and the tooth-shaped cavity 12, an upper mold 15 is connected to the other end side surface of the circular hole cavity 11 in a sliding manner, a tapered groove 16 is arranged on one end surface of the upper mold 15, and a cylindrical head 17 is fixedly connected to the center of the;
the processing method comprises the following steps:
s1, selecting a 20CrMoTi material, and roughly forging to form a bar stock, wherein the diameter is the diameter of the tooth-shaped part, and the tolerance is +8mm to +12 mm;
s2, preheating the bar stock to 200-250 ℃, preserving heat for 10-15 minutes, and then heating to 800-950 ℃;
s3, inserting the heated bar into the round hole cavity, and pushing the upper die to perform downward pressing forging in a reciprocating mode;
s4, forging and deforming the bar stock, enabling the bar stock to enter a shaft cavity, a circular arc cavity and a tooth-shaped cavity, and forming;
s5, enabling the material at the other end to enter a tapered groove for forming, and forming a tapered head and a positioning hole;
and S6, after cooling and shaping, tapping the inside of the shaping hole, connecting the lifting ring, pulling out the gear shaft, and demolding to finish the processing of the gear shaft.
Referring to fig. 1, a side surface of a shaft cavity 13 is forged to form a wheel shaft 2, a side surface of one end of the wheel shaft 2 is provided with an arc portion 21, the wheel shaft 2 is forged and formed in the shaft cavity 13, integrated machining is achieved, high efficiency and stability are achieved, the other end of the arc portion 21 is fixedly connected with a tooth-shaped portion 22, the surface of the tooth-shaped portion 22 is located on the side surface of a tooth-shaped cavity 12, the tooth-shaped portion 22 is forged and formed through the tooth-shaped cavity 12, integrated machining can be achieved, position accuracy is guaranteed, production efficiency is improved, a conical head 23 is formed in the center of the surface of the other end of the tooth-shaped portion 22, the surface of the conical head 23 is located on the side surface of a conical groove 16, a conical head 23 is forged and formed through the conical groove 16, positioning and clamping during later machining are facilitated, accuracy and stability are improved, a positioning hole 24, make things convenient for the drawing of patterns, it is safe high-efficient, go up the other end fixed surface of mould 15 and be connected with installation pole 25, the side one end fixedly connected with mounting panel 26 of bed die 1 through connecting installation pole 25 and mounting panel 26, does benefit to the components of a whole that can function independently installation fixed, guarantees the safety in utilization.
The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.
Claims (7)
1. A gear shaft precision processing method and a gear shaft die used in the method comprise a lower die (1), and are characterized in that: a circular hole cavity (11) is formed in the surface of one end of the lower die (1), a tooth-shaped cavity (12) is formed in the bottom of the circular hole cavity (11), a shaft cavity (13) is formed in the center of the bottom of the tooth-shaped cavity (12), a circular arc cavity (14) is formed in the connecting position of the shaft cavity (13) and the tooth-shaped cavity (12), an upper die (15) is connected to the side face of the other end of the circular hole cavity (11) in a sliding mode, a conical groove (16) is formed in the surface of one end of the upper die (15), and a cylindrical head (17) is fixedly connected to the center of the conical groove (16);
the processing method comprises the following steps:
s1, selecting a 20CrMoTi material, and roughly forging to form a bar stock, wherein the diameter is the diameter of the tooth-shaped part, and the tolerance is +8mm to +12 mm;
s2, preheating the bar stock to 200-250 ℃, preserving heat for 10-15 minutes, and then heating to 800-950 ℃;
s3, inserting the heated bar into the round hole cavity, and pushing the upper die to perform downward pressing forging in a reciprocating mode;
s4, forging and deforming the bar stock, enabling the bar stock to enter a shaft cavity, a circular arc cavity and a tooth-shaped cavity, and forming;
s5, enabling the material at the other end to enter a tapered groove for forming, and forming a tapered head and a positioning hole;
and S6, after cooling and shaping, tapping the inside of the shaping hole, connecting the lifting ring, pulling out the gear shaft, and demolding to finish the processing of the gear shaft.
2. A gear shaft precision machining method and a gear shaft mold used in the method according to claim 1, characterized in that: the side surface of the shaft cavity (13) is forged to form a wheel shaft (2), and an arc part (21) is arranged on the side surface of one end of the wheel shaft (2).
3. A gear shaft precision machining method and a gear shaft mold used in the method according to claim 2, characterized in that: the other end of the arc part (21) is fixedly connected with a tooth-shaped part (22), and the surface of the tooth-shaped part (22) is positioned on the side surface of the tooth-shaped cavity (12).
4. A gear shaft precision machining method and a gear shaft mold used in the method according to claim 3, characterized in that: a conical head (23) is formed at the center of the other end surface of the tooth-shaped part (22), and the surface of the conical head (23) is positioned on the side surface of the conical groove (16).
5. The gear shaft precision machining method and the gear shaft mold used in the method according to claim 4, characterized in that: the other end surface of the conical head (23) is provided with a positioning hole (24), and the side surface of the positioning hole (24) is sleeved on the surface of the cylindrical head (17).
6. A gear shaft precision machining method and a gear shaft mold used in the method according to claim 1, characterized in that: the surface of the other end of the upper die (15) is fixedly connected with a mounting rod (25), and one end of the side surface of the lower die (1) is fixedly connected with a mounting plate (26).
7. A gear shaft precision machining method and a gear shaft mold used in the method according to claim 1, characterized in that: the upper die (15) is connected to the side surface of the round hole cavity (11) in a sliding mode, and the clearance tolerance is-0.05 mm to-0.02 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011084656.8A CN112275980A (en) | 2020-10-12 | 2020-10-12 | Gear shaft precision machining method and gear shaft mold used in same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011084656.8A CN112275980A (en) | 2020-10-12 | 2020-10-12 | Gear shaft precision machining method and gear shaft mold used in same |
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| Publication Number | Publication Date |
|---|---|
| CN112275980A true CN112275980A (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011084656.8A Pending CN112275980A (en) | 2020-10-12 | 2020-10-12 | Gear shaft precision machining method and gear shaft mold used in same |
Country Status (1)
| Country | Link |
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| CN (1) | CN112275980A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116493492A (en) * | 2023-05-12 | 2023-07-28 | 扬州意得机械有限公司 | Shaping die of split type stator sprocket of being convenient for trade profile of tooth |
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| JP2003117631A (en) * | 2001-10-11 | 2003-04-23 | Kawasaki Seikoki:Kk | Method of manufacturing forging with gear part, device used therefor, and forging with gear part obtained therewith |
| CN101332488A (en) * | 2008-08-01 | 2008-12-31 | 上海东芙冷锻制造有限公司 | Cold-forging technique of gear shaft |
| KR20100027258A (en) * | 2008-09-02 | 2010-03-11 | 고석재 | Manufacturing method of gear main drive |
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| CN103990753A (en) * | 2014-05-22 | 2014-08-20 | 北京科技大学 | Oil pump gear shaft precision-forging forming mold and forming method |
| CN104439000A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Loose tooling forging method for long support shaft type gear forged piece |
| CN104785698A (en) * | 2015-03-20 | 2015-07-22 | 北京科技大学 | Mold and technology for gear shaft forging |
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| CN205341779U (en) * | 2016-01-21 | 2016-06-29 | 天津市增益达精锻齿轮科技有限公司 | Big excircle cold forging mould of semi -axis bevel gear |
| CN109590426A (en) * | 2018-12-05 | 2019-04-09 | 上海交大中京锻压有限公司 | The blank mold structure of automobile engine using new energy resources gear shaft enclosed forging and forming |
| CN111014561A (en) * | 2019-12-23 | 2020-04-17 | 金马工业集团股份有限公司 | Combined embedded die for producing sector gear shaft |
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2020
- 2020-10-12 CN CN202011084656.8A patent/CN112275980A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2144006A1 (en) * | 1971-09-02 | 1973-03-15 | Kabel Metallwerke Ghh | PROCESS FOR CHIP-FREE PRODUCTION OF BEVEL GEAR WHEELS |
| JP2003117631A (en) * | 2001-10-11 | 2003-04-23 | Kawasaki Seikoki:Kk | Method of manufacturing forging with gear part, device used therefor, and forging with gear part obtained therewith |
| CN101332488A (en) * | 2008-08-01 | 2008-12-31 | 上海东芙冷锻制造有限公司 | Cold-forging technique of gear shaft |
| KR20100027258A (en) * | 2008-09-02 | 2010-03-11 | 고석재 | Manufacturing method of gear main drive |
| DE102011114844A1 (en) * | 2010-10-06 | 2012-04-12 | Siepmann-Werke Gmbh & Co. Kg | Method for manufacturing near-net-shape premolded gear tooth system at shaft utilized in e.g. slew transmission of automobile, involves punching shaft head in area of gear tooth system at front side in parabolic manner |
| CN102303059A (en) * | 2011-09-21 | 2012-01-04 | 南京工业职业技术学院 | One-time molding method of gear wheel shaft |
| CN103192020A (en) * | 2013-03-11 | 2013-07-10 | 浙江新东方汽车零部件有限公司 | Gear shaft forming method and die adopted by same |
| CN103350122A (en) * | 2013-06-28 | 2013-10-16 | 洛阳北川重工机械有限公司 | Gear shaft cold extruding process and mould |
| CN103990753A (en) * | 2014-05-22 | 2014-08-20 | 北京科技大学 | Oil pump gear shaft precision-forging forming mold and forming method |
| CN104439000A (en) * | 2014-11-10 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Loose tooling forging method for long support shaft type gear forged piece |
| CN104785698A (en) * | 2015-03-20 | 2015-07-22 | 北京科技大学 | Mold and technology for gear shaft forging |
| CN105290299A (en) * | 2015-12-09 | 2016-02-03 | 四川众友机械有限责任公司 | Forging technology of long shaft type half shaft gear |
| CN205341779U (en) * | 2016-01-21 | 2016-06-29 | 天津市增益达精锻齿轮科技有限公司 | Big excircle cold forging mould of semi -axis bevel gear |
| CN109590426A (en) * | 2018-12-05 | 2019-04-09 | 上海交大中京锻压有限公司 | The blank mold structure of automobile engine using new energy resources gear shaft enclosed forging and forming |
| CN111014561A (en) * | 2019-12-23 | 2020-04-17 | 金马工业集团股份有限公司 | Combined embedded die for producing sector gear shaft |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116493492A (en) * | 2023-05-12 | 2023-07-28 | 扬州意得机械有限公司 | Shaping die of split type stator sprocket of being convenient for trade profile of tooth |
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Application publication date: 20210129 |