CN105179450A - Production method of car transmission input axle hubs - Google Patents
Production method of car transmission input axle hubs Download PDFInfo
- Publication number
- CN105179450A CN105179450A CN201510636023.6A CN201510636023A CN105179450A CN 105179450 A CN105179450 A CN 105179450A CN 201510636023 A CN201510636023 A CN 201510636023A CN 105179450 A CN105179450 A CN 105179450A
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- Prior art keywords
- housing
- cylindrical wall
- wall
- cylindrical
- face
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a production method of car transmission input axle hubs. The production method includes the first step of warm forging and plastic molding, the second step of spheroidizing annealing, the third step of cold extrusion of internal teeth, the fourth step of machining, the fifth step of rolling of external teeth, and the sixth step of thermal treatment and subsequent machining operations including carbonitriding, sand blasting and external grinding. According to the method, it is unnecessary to form the internal teeth and the external teeth of external circles in a gear shaping manner, and the extruded internal teeth of internal holes and the rolled external teeth of external circles are combined and are formed instantly on a press and a rolling machine, so that the production efficiency is high, metal materials are saved, the cost is low, and internal tissues in hubs have high density; and besides, due to the fact that the metal material assembly line is not cut off, the general mechanical performance is improved, the product quality is stable, and the use requirements of automatic transmissions of cars can be met.
Description
Technical field
The invention belongs to forging and molding technical field, be specifically related to the cold combined forging mould-forming method of a kind of input shaft of car transmission hub temperature.
Background technique
Input shaft of car transmission hub is intended for a tooth axle vital part of transmission, although product is little, quality requirement is very high, and especially product center internal tooth tooth top internal diameter size is generally designed to ￠ 8-10mm, tooth root internal diameter size is generally designed to ￠ 10-12mm, and the internal tooth facewidth is at 22-30mm.State Intellectual Property Office discloses the cold-forging precise forming technique (CN101332489A) of a kind of tooth cover, and its method is: the first step, with garden saw by alloyed steel pipe blanking, and weight error ± 0.5 gram that blank blanking and tooth overlap; Second step, anneals steel pipe base blanking in pit-type furnace, 850-880 DEG C, and insulation 6-8 hour, is cooled to less than 350 DEG C to come out of the stove with stove; 3rd step, employing phospholeum production line routinely technique carries out phosphatization and saponification process to moving back the steel pipe base blanking overdoed, and form surface lubrication layer, wherein phosphatization temperature is 70-80 DEG C, and the time is 15-25 minute; Saponification temperature is 60-70 DEG C, and the time is 5-15 minute; 4th step, adopts high-strength die steel making piece pre-forming die and block forging mould; 5th step, uses 400T mechanical press, four guide pillar universal die set and piece pre-forming dies, the cylinder small end of cold-forging forming tooth cover and preforming, and preformed volume equals the volume of the large end of cylinder of tooth cover; 6th step, use 400T mechanical press, four guide pillar universal die sets and block forging mould, tooth is mounted on punch, tooth overlaps preformed side and die inwall has volume integral fluid space, punch loaded onto by the drift of 400T mechanical press, drift presses down the internal taper hole entering tooth cover, once with perforation in inaccessible shunting forging and molding, tooth cover preforming diameter swells and is full of volume integral fluid space simultaneously, reach the diameter that the large end gauage of cylinder of tooth cover is fixed, it is 8-10mm/ second that drift presses down speed, and pressure is 300kg/mm2.It adopts alloy steel pipe to produce, but cannot the long and product that hole wall is thick of little, the degree of depth in production aperture.Current input shaft of car transmission hub generally adopts the direct Milling Process of bar, then Gear Shaping method shaping internal tooth and cylindrical external tooth is adopted, process saloon car transmission hub pinion cutter in this way easily to damage, finished product rate is low, effect is also low, manufacture cycle is long, and waste metallic material, cost is high.Gear Shaping is cut off due to metallic material metal streamline, and product comprehensive mechanical performance reduces, and is the direct processing of mother metal, brings interiors of products tissue looseness, easily causes driving cog to damage phenomenon, and quality of product is difficult to ensure.
Summary of the invention
The invention provides the warm cold combined forging forming technique of a kind of employing, the method of forging and molding input shaft of car transmission hub, input shaft of car transmission hub has that center hole internal diameter is little, the degree of depth is long and hole wall is thick, center hole internal diameter is ￠ 8-12mm, the degree of depth is 22-30mm, overcome in prior art and adopt machine tooling, interiors of products tissue looseness, comprehensive mechanical performance be poor, easily cause that driving cog damages phenomenon, quality of product is difficult to the defect that ensures, working life is short.
The present invention is achieved by the following technical solution:
The production method of input shaft of car transmission hub, input shaft of car transmission hub comprises the shank of housing and housing lower end whole installation, and the end face center of shank is provided with shrinkage pool; Cylindrical cavity, inverted cone cavity and central bore housing that the inner chamber of housing is divided into successively by housing end face are formed, and the center hole internal diameter that central bore housing is corresponding is ￠ 8-12mm, the degree of depth is 22-30mm, and center bore inner wall is provided with straight-tooth; Housing exterior walls is three sections of cylindrical structures, and be followed successively by large cylindrical wall, middle cylindrical wall and little cylindrical wall by housing end face, little cylindrical wall is provided with external tooth; Its production method comprises following process step:
1. warm forging plastic forming: solid cylindrical metal blank is heated to forging temperature, die forging goes out the shank of housing and housing lower end whole installation, cylindrical cavity, inverted cone cavity and central bore housing that the inner chamber of housing is divided into successively by housing end face are formed, and the center hole internal diameter that central bore housing is corresponding is ￠ 8-12mm, the degree of depth is 22-30mm; Housing exterior walls is three sections of cylindrical structures, is followed successively by large cylindrical wall, middle cylindrical wall and little cylindrical wall by housing end face;
2. spheroidizing annealing;
3. cold-extruded internal tooth: the straight-tooth on the center bore inner wall that cold hobbing central bore housing is corresponding;
4. machining: to the blank machine processing after above-mentioned cold-extruded internal tooth, the position close to middle cylindrical wall on the little cylindrical wall of housing exterior walls is made to form annular groove, the end face of the central bore housing of housing cavity forms circular groove, large cylindrical wall and middle cylindrical wall jointing place form chamfering, are formed centrally shrinkage pool in the end face of shank;
5. roll extrusion external tooth: to the blank cold rolling cylindrical wall external tooth after above-mentioned machining, makes the little cylindrical wall of housing exterior walls forms external tooth;
6. heat treatment and following process: carbonitriding, sandblasting, cylindrical grinding.
Warm forging plastic forming comprises a, blanking, b, ball blast, coating, c, heating forward extrusion, solid cylindrical metal blank is formed cylindrical body that two sections of diameter differ and the changeover portion between them, d, jumping-up pre-shaping, blank after heating forward extrusion is carried out to the pre-shaping housing of reallocation pre-shaping shank and upper-end surface depression, e, warm forging is shaping: by the blank heating after jumping-up pre-shaping to 820-880 DEG C, die forging goes out the shank of housing and housing lower end whole installation, the cylindrical cavity that the inner chamber of housing is divided into successively by housing end face, inverted cone cavity and central bore housing are formed, the center hole internal diameter that central bore housing is corresponding is ￠ 8-12mm, the degree of depth is 22-30mm, housing exterior walls is three sections of cylindrical structures, is followed successively by large cylindrical wall, middle cylindrical wall and little cylindrical wall by housing end face.
The present invention compared with prior art has following beneficial effect:
Instant invention overcomes in prior art and adopt machine tooling, interiors of products tissue looseness, comprehensive mechanical performance is poor, driving cog is easily caused to damage phenomenon, quality of product is difficult to ensure, the defect that working life is short, breach prior art mesoporous little, the degree of depth is grown and the technical bottleneck of the thick forging difficulty of hole wall, adopt warm cold combined forging forming technique forging and molding input shaft of car transmission hub, do not need gear shaping shaping internal tooth and cylindrical external tooth, extruding endoporus internal tooth combines with cylindrical rolling external tooth, press machine and roller complete instantaneously, production effect is high, save metallic material, cost is low, interiors of products tissue density is high, and metallic material streamline is not cut off, improve comprehensive mechanical performance, constant product quality, auto gearbox usage requirement can be met.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of embodiment of the present invention product;
Fig. 2 is embodiment of the present invention blank deformation process flow diagram.
Sequence number in figure: 1, housing, 2, shank, 3, cylindrical cavity, 4, inverted cone cavity, 5, central bore housing, 6, large cylindrical wall, 7, middle cylindrical wall, 8, little cylindrical wall, 9, shrinkage pool, 10, annular groove, 11, chamfering, 12, circular groove.
Embodiment
Also by reference to the accompanying drawings technological scheme of the present invention is described in further detail below by embodiment.
Embodiment: shown in Figure 1, a kind of input shaft of car transmission hub comprises the shank 2 of housing 1 and housing lower end whole installation, and the end face center of shank 2 is provided with shrinkage pool 9; Cylindrical cavity 3, inverted cone cavity 4 and central bore housing 5 that the inner chamber of housing 1 is divided into successively by housing end face are formed, and the center hole internal diameter of central bore housing 5 correspondence is ￠ 9.6mm, the degree of depth is 22mm, and center bore inner wall is provided with straight-tooth; Housing 1 outer wall is three sections of cylindrical structures, and be followed successively by large cylindrical wall 6, middle cylindrical wall 7 and little cylindrical wall 8 by housing end face, little cylindrical wall 8 is provided with external tooth.
Shown in Figure 2, the production method of this input shaft of car transmission hub comprises following process step:
1. warm forging plastic forming: a, blanking, b, ball blast, coating, c, heating forward extrusion, solid cylindrical metal blank is formed cylindrical body that two sections of diameter differ and the changeover portion between them, d, jumping-up pre-shaping, blank after heating forward extrusion is carried out to the pre-shaping housing of reallocation pre-shaping shank and upper-end surface depression, e, warm forging is shaping: by the blank heating after jumping-up pre-shaping to 820-880 DEG C, die forging goes out the shank 2 of housing 1 and housing lower end whole installation, the cylindrical cavity 3 that the inner chamber of housing 1 is divided into successively by housing end face, inverted cone cavity 4 and central bore housing 5 are formed, the center hole internal diameter of central bore housing 5 correspondence is ￠ 9.6mm, the degree of depth is 22mm, housing 1 outer wall is three sections of cylindrical structures, is followed successively by large cylindrical wall 6, middle cylindrical wall 7 and little cylindrical wall 8 by housing end face,
2. spheroidizing annealing and phosphatization saponification process;
3. cold-extruded internal tooth: the straight-tooth on the center bore inner wall of cold hobbing central bore housing 5 correspondence;
4. machining: to the blank machine processing after above-mentioned cold-extruded internal tooth, the position close to middle cylindrical wall 7 on the little cylindrical wall 8 of housing 1 outer wall is made to form annular groove 10, the end face of the central bore housing 5 of housing 1 inner chamber forms circular groove 12, large cylindrical wall 6 forms chamfering 11 with middle cylindrical wall 7 jointing place, is formed centrally shrinkage pool 9 in the end face of shank 2;
5. roll extrusion external tooth: to the blank cold rolling cylindrical wall external tooth after above-mentioned machining, makes the little cylindrical wall 8 of housing 1 outer wall forms external tooth;
6. heat treatment and following process: carbonitriding, sandblasting, cylindrical grinding.
Embodiment is just for the ease of understanding technological scheme of the present invention; do not form limiting the scope of the invention; every do not depart from technical solution of the present invention interior perhaps above scheme is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong within scope.
Claims (2)
1. the production method of input shaft of car transmission hub, input shaft of car transmission hub comprise housing (1) with the shank of housing lower end whole installation (2), (9) shank end face center is (2) provided with shrinkage pool; The cylindrical cavity that housing inner chamber is (1) divided into successively by housing end face (3), (5) (4) inverted cone cavity formed with central bore housing, and the center hole internal diameter that central bore housing is (5) corresponding is ￠ 8-12mm, the degree of depth is 22-30mm, and center bore inner wall is provided with straight-tooth; Housing (1) outer wall is three sections of cylindrical structures, by housing end face be followed successively by large cylindrical wall (6), middle cylindrical wall (7) with little cylindrical wall (8), (8) little cylindrical wall is provided with external tooth; Its production method comprises following process step:
1. warm forging plastic forming: solid cylindrical metal blank is heated to forging temperature, die forging go out housing (1) with the shank of housing lower end whole installation (2), the cylindrical cavity that housing inner chamber is (1) divided into successively by housing end face (3), (5) (4) inverted cone cavity formed with central bore housing, and the center hole internal diameter that central bore housing is (5) corresponding is ￠ 8-12mm, the degree of depth is 22-30mm; Housing (1) outer wall is three sections of cylindrical structures, by housing end face be followed successively by large cylindrical wall (6), middle cylindrical wall (7) with little cylindrical wall (8);
2. spheroidizing annealing;
3. cold-extruded internal tooth: the straight-tooth on the center bore inner wall that cold hobbing central bore housing is (5) corresponding;
4. machining: to the blank machine processing after above-mentioned cold-extruded internal tooth, (8) the little cylindrical wall of housing (1) outer wall is gone up and forms annular groove (10) close to middle cylindrical wall position (7), (12) the central bore housing end face (5) of housing (1) inner chamber forms circular groove, (11) (7) (6) large cylindrical wall form chamfering in jointing place with middle cylindrical wall, is formed centrally shrinkage pool (9) in shank end face (2);
5. roll extrusion external tooth: to the blank cold rolling cylindrical wall external tooth after above-mentioned machining, make housing (1) outer wall little cylindrical wall (8) on form external tooth;
6. heat treatment and following process: carbonitriding, sandblasting, cylindrical grinding.
2. the production method of input shaft of car transmission hub according to claim 1, it is characterized in that: warm forging plastic forming comprises a, blanking, b, ball blast, coating, c, heating forward extrusion, solid cylindrical metal blank is formed cylindrical body that two sections of diameter differ and the changeover portion between them, d, jumping-up pre-shaping, blank after heating forward extrusion is carried out to the pre-shaping housing of reallocation pre-shaping shank and upper-end surface depression, e, warm forging is shaping: by the blank heating after jumping-up pre-shaping to 820-880 DEG C, die forging go out housing (1) with the shank of housing lower end whole installation (2), the cylindrical cavity that housing inner chamber is (1) divided into successively by housing end face (3), (5) (4) inverted cone cavity formed with central bore housing, the center hole internal diameter that central bore housing is (5) corresponding is ￠ 8-12mm, the degree of depth is 22-30mm, housing (1) outer wall is three sections of cylindrical structures, by housing end face be followed successively by large cylindrical wall (6), middle cylindrical wall (7) with little cylindrical wall (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510636023.6A CN105179450A (en) | 2015-09-30 | 2015-09-30 | Production method of car transmission input axle hubs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510636023.6A CN105179450A (en) | 2015-09-30 | 2015-09-30 | Production method of car transmission input axle hubs |
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| CN105179450A true CN105179450A (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510636023.6A Pending CN105179450A (en) | 2015-09-30 | 2015-09-30 | Production method of car transmission input axle hubs |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106736290A (en) * | 2016-12-26 | 2017-05-31 | 重庆创精温锻成型有限公司 | The preparation method of automobile DCT automatic transmission clutch propeller boss |
| CN107138926A (en) * | 2017-06-20 | 2017-09-08 | 江苏威鹰机械有限公司 | Automobile CVT automatic transmission guide wheel shaft manufacturing process |
| CN108274207A (en) * | 2017-12-29 | 2018-07-13 | 太仓久进汽车零部件有限公司 | A kind of automobile DCT speed changers input outer shaft cold forging base forming technology |
| CN108274192A (en) * | 2017-12-29 | 2018-07-13 | 太仓久进汽车零部件有限公司 | Automobile DCT speed changers input outer shaft deep hole cold forging base forming technology |
| CN111001984A (en) * | 2019-12-10 | 2020-04-14 | 广州小出钢管有限公司 | Manufacturing process of rotating shaft of seat angle adjuster |
| CN111015134A (en) * | 2019-12-10 | 2020-04-17 | 江苏森威精锻有限公司 | End face tooth bell housing and manufacturing method thereof |
| CN112091550A (en) * | 2020-09-17 | 2020-12-18 | 舟山市7412工厂 | Machining method of combined gear |
| CN112171188A (en) * | 2020-09-17 | 2021-01-05 | 王颜琦 | Manufacturing process of speed measuring rotor |
| CN112643302A (en) * | 2020-12-18 | 2021-04-13 | 深圳市糠帝科技有限公司 | Shaft entering process for rotating shaft rotor of micro motor |
| CN115213641A (en) * | 2022-07-29 | 2022-10-21 | 中国第一汽车股份有限公司 | Processing method of transmission input shaft |
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| WO2008075458A1 (en) * | 2006-12-20 | 2008-06-26 | Ntn Corporation | Hub ring of bearing device for wheel and method of producing the same |
| JP2010188830A (en) * | 2009-02-17 | 2010-09-02 | Jtekt Corp | Wheel bearing device |
| CN103753159A (en) * | 2014-01-10 | 2014-04-30 | 重庆创精温锻成型有限公司 | Production method for second gears of automatic automotive transmissions |
| CN103753142A (en) * | 2014-01-10 | 2014-04-30 | 重庆创精温锻成型有限公司 | Production method for input axle hubs of automotive clutches |
-
2015
- 2015-09-30 CN CN201510636023.6A patent/CN105179450A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008075458A1 (en) * | 2006-12-20 | 2008-06-26 | Ntn Corporation | Hub ring of bearing device for wheel and method of producing the same |
| JP2010188830A (en) * | 2009-02-17 | 2010-09-02 | Jtekt Corp | Wheel bearing device |
| CN103753159A (en) * | 2014-01-10 | 2014-04-30 | 重庆创精温锻成型有限公司 | Production method for second gears of automatic automotive transmissions |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106736290A (en) * | 2016-12-26 | 2017-05-31 | 重庆创精温锻成型有限公司 | The preparation method of automobile DCT automatic transmission clutch propeller boss |
| CN107138926A (en) * | 2017-06-20 | 2017-09-08 | 江苏威鹰机械有限公司 | Automobile CVT automatic transmission guide wheel shaft manufacturing process |
| CN108274207A (en) * | 2017-12-29 | 2018-07-13 | 太仓久进汽车零部件有限公司 | A kind of automobile DCT speed changers input outer shaft cold forging base forming technology |
| CN108274192A (en) * | 2017-12-29 | 2018-07-13 | 太仓久进汽车零部件有限公司 | Automobile DCT speed changers input outer shaft deep hole cold forging base forming technology |
| CN111001984A (en) * | 2019-12-10 | 2020-04-14 | 广州小出钢管有限公司 | Manufacturing process of rotating shaft of seat angle adjuster |
| CN111015134A (en) * | 2019-12-10 | 2020-04-17 | 江苏森威精锻有限公司 | End face tooth bell housing and manufacturing method thereof |
| CN112091550A (en) * | 2020-09-17 | 2020-12-18 | 舟山市7412工厂 | Machining method of combined gear |
| CN112171188A (en) * | 2020-09-17 | 2021-01-05 | 王颜琦 | Manufacturing process of speed measuring rotor |
| CN112643302A (en) * | 2020-12-18 | 2021-04-13 | 深圳市糠帝科技有限公司 | Shaft entering process for rotating shaft rotor of micro motor |
| CN115213641A (en) * | 2022-07-29 | 2022-10-21 | 中国第一汽车股份有限公司 | Processing method of transmission input shaft |
| CN115213641B (en) * | 2022-07-29 | 2024-03-19 | 中国第一汽车股份有限公司 | Method for machining transmission input shaft |
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Application publication date: 20151223 |