CN105904170A - Technology and die for processing high-strength 20CrMo universal joint pin differential mechanism - Google Patents
Technology and die for processing high-strength 20CrMo universal joint pin differential mechanism Download PDFInfo
- Publication number
- CN105904170A CN105904170A CN201610477127.1A CN201610477127A CN105904170A CN 105904170 A CN105904170 A CN 105904170A CN 201610477127 A CN201610477127 A CN 201610477127A CN 105904170 A CN105904170 A CN 105904170A
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- China
- Prior art keywords
- 20crmo
- blank
- crossed
- axis differential
- high intensity
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Classifications
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- 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
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- 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
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
-
- 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
-
- 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
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/38—Constructional details
- F16H2048/382—Methods for manufacturing differential gearings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
Abstract
The invention discloses a technology and die for processing a high-strength 20CrMo universal joint pin differential mechanism. Nano high-strength preform body is obtained through the severe plastic deformation technology, as equal-channel angular extrusion does not change the geometrical shape of the preform body and can effectively refine crystal particles, a cylindrical 20CrMo steel bar with a given size passes through a 45-degree corner for equal-channel angular extrusion and grain refinement to obtain 20CrMo nano high-strength steel bar preform body, and then the 20CrMo nano high-strength steel bar preform body is subjected to extrusion once to form a strip-shaped cross section long-axis semi-finished product of the universal joint pin differential mechanism so as to avoid repeated extrusion. The invention provides the technology and die technology for processing the high-strength 20CrMo universal joint pin differential mechanism.
Description
Technical field
The invention belongs to a kind of crossed-axis differential structure design and shape technique and Tool and Die Technology, being specifically related to a kind of high efficiency processing high intensity 20CrMo crossed-axis differential and shape new method.
Background technology
Automobile differential is the main part of automobile drive axle, and the when of automobile turning, the radius of turn of two wheels is different,
Need a wheel turn as soon as possible one a little slower, two-wheeled different rotating speeds to be realized, it is necessary to realize by differential mechanism, differential mechanism has one
Individual cross axle, equipped with four planetary gears, the main body of crossed-axis differential is a hollow cydariform or column construction, has smaller cylindrical connector, in " ten " font, it is desirable to have higher dimensional accuracy and positional precision around body exterior.For ensureing the positional precision of crossed-axis differential, crossed-axis differential generally uses Split type structure, article two, the planetary gear axle intersecting into cross is processed respectively, then it is assembled together, wherein a planetary gear axle pin to be passed through is fixed on differential casing, so the crossed-axis differential of prior art not only structure is more complicated, and processes and assemble the most loaded down with trivial details.It addition,
The both sides of the main body of crossed-axis differential semi-finished product are planar structures in the prior art, such semi-finished product add have man-hour be difficult to location, be easily worked dislocation, inefficient shortcoming.Thus, it is desirable to have the manufacturing process of a kind of highly-efficient processing crossed-axis differential can overcome or alleviated by the drawbacks described above of prior art.
Summary of the invention
The mesh of patent of the present invention is to overcome the drawback of existing method for producing, first pass through severe plastic deformation technology and obtain nanometer high intensity blank, then by an extrusion molding strip crossed-axis differential major cross-sectional axis class blank, avoid repeatedly extruding, it is provided that a kind of process high intensity 20CrMo crossed-axis differential technique and Tool and Die Technology.
The technical scheme of patent of the present invention is:
1. a kind of technique processing high intensity 20CrMo crossed-axis differential of the present invention and Tool and Die Technology, its converted products is 20CrMo crossed-axis differential, this product structure includes middle connected body and the planetary gear axle arranged on middle connected body in cross, it is characterized in that: planetary gear axle and middle connected body are overall warm-extrusion forming part, and middle connected body is cylinder and is provided with center hole.
2. a kind of technique processing high intensity 20CrMo crossed-axis differential of the present invention and Tool and Die Technology, its processing step is:
(1) blanking base；
Described blanking base includes: (1) peeling is processed, and 20CrMo steel carry out peeling processing, removes oxide skin and the surface grooves crackle etc. of material surface；(2) according to shape, the size of product, and the feature base such as the plasticity of material.
(2) blank crystal grain nanorize
Due to Equal-channel Angular Pressing have do not change blank geometry and can effective crystal grain thinning, the cylindrical shape 20CrMo rod iron of intended size is obtained 20CrMo nanometer high intensity rod iron blanks by 45 ° of turning Equal-channel Angular Pressing crystal grain refinements.
(3) blank heating, lubrication and mould the pre-heat treatment；
Described blank heating, lubrication and mould the pre-heat treatment include: 20CrMo blank is carried out pickling processes by (1)；(2) lubricant is smeared at blank surface；(3) first 20CrMo blank is preheated to about 160 DEG C, is then placed in vacuum heat treatment furnace heating, and makes its temperature be heated to 700 DEG C in 10s；(4) mould is preheated to 200 DEG C.
(4) continuous warm-extrusion forming 20CrMo crossed-axis differential blank；
Described continuous warm-extrusion forming 20CrMo crossed-axis differential blank refers to: put in mould by treated blank, one-time continuous warm-extrusion forming 20CrMo crossed-axis differential major cross-sectional axis class blank.This major axis class 20CrMo blank is characterised by: one be 20CrMo blank be the blank of a warm-extrusion forming longer dimension, extrusion molding strip crossed-axis differential major cross-sectional axis class blank, avoid repeatedly extruding, Warm Extrusion is to cross acquisition progressive forming process by extruding continuously, if the enough multipotencys of blank obtain the crossed-axis differential major cross-sectional axis class blank of endless, improve working (machining) efficiency；Two is that the intermediate connector of 20CrMo blank is cylinder and is provided with center hole, and the planetary gear axle arranged in cross is cuboid.
The mould that continuous warm extrusion is pressed into crossed-axis differential blank is mainly made up of die and punch assemblies, the outline of ten weeks blanks of die assembly mould shape and differential mechanism is corresponding, punch die body shape is corresponding to cross axle intermediate connector internal via shape, it is characterized in that: using and put on die, interior die is provided with targeting part, crimping section and shaped portion；Punch die body profile top is provided with chamfering.
The equipment of warm-extrusion forming 20CrMo crossed-axis differential blank is continuously extruded shaping long crossed-axis differential major cross-sectional axis class blank on press vertical squeezing continuously.
(5) line cutting forming more than one piece crossed-axis differential semi-finished articles；
Described line cutting forming more than one piece 20CrMo crossed-axis differential half product part refers to: by the 20CrMo crossed-axis differential blank of continuous warm-extrusion forming, width dimensions requirement according to crossed-axis differential finished parts, uses the method for line cutting to be processed into more than one piece crossed-axis differential semi-finished articles.
(6) carry out semi-finished articles one by one being cut into finished parts.
Described semi-finished articles is carried out being cut into finished parts refer to: the more than one piece semi-finished articles that line is cut into, according to crossed-axis differential dimensional requirement, the cross cuboid axle of the cross axle semi-finished articles after line is cut machining cylindrical planetary gear axle respectively, and then semi-finished articles is processed into finished parts.
The invention has the beneficial effects as follows: the prototype blank that (one) present invention uses obtains nanometer high intensity rod iron blank by 45 ° of turning Equal-channel Angular Pressing crystal grain refinements；(2) crossed-axis differential that the present invention provides, have employed overall Warm Extrusion structure, not only makes simple in construction, and is easy to processing and assembling；(3) it is the machining accuracy guaranteeing cross axle, the middle connected body of cross axle is provided with center hole, utilize being accurately positioned of center hole, cross axle can be easier to realize the processing request of high dimensional accuracy and positional precision, the normal work of automobile differential is effectively ensured, has improved the service life of automobile differential；(4) owing to using one-time continuous warm-extrusion forming major axis class crossed-axis differential blank, then line cuts into more than one piece cross axle semi-finished articles, the relatively method of single-piece extrusion molding finished parts, can effectively reduce forging and molding number of times, improves cross axle forming efficiency.
Accompanying drawing explanation
It is presented herein below and in conjunction with the accompanying drawings and embodiments specific embodiments of the present invention is described in detail.
Fig. 1 is the simple schematic diagram of processing technique of the present invention；
Fig. 2 is 20CrMo nanometer high intensity rod iron blank severe plastic deformation mould of the present invention；
Fig. 3 is Warm Extrusion continuous forming die working state schematic representation of the present invention；
Fig. 4 is punch of the present invention, die part schematic diagram；
Fig. 5 processes crossed-axis differential forming process schematic three dimensional views for using the present invention；
Being labeled as in above-mentioned figure:
Fig. 2 is the 1-upper bolster of 20CrMo nanometer high intensity rod iron blank severe plastic deformation mould, 2-recipient pressing plate, 3-heating jacket, 4-pressure ram, 5-heater, 6-shrink ring, 7-recipient backing plate, 8-heating jacket, 9-die shoe, 10-hexagon socket head cap screw, 11-hexagon socket head cap screw, 12-corner insert, 13-guide pillar, 14-extrudes pad, 15-recipient, 16-guide pin bushing, 17-pressure ram fixes version, 18-hexagon socket head cap screw, 19-pressure ram backing plate.
Fig. 3 is 1. upper bolsters of temperature extension mould schematic diagram of the present invention, 2. die backing plate, 3. stiffening ring, 4. guide ring, 5. guide pin bushing, 6. punch ring for fixing, 7. convex mould base, 8. die shoe, 9 workpiece, 10. in die, 11. screws, 12. punch, 13. die glands, 14. guide pillars, 15. lower bolsters.
Detailed description of the invention
Clearer for the purpose making the present invention implement, technical scheme and advantage, below in conjunction with the accompanying drawing of the present invention, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, the most same or similar label represents same or similar part or has the part of same or like function.Described embodiment is a part of embodiment of the present invention rather than whole embodiments.Below with reference to the accompanying drawings the embodiment described in is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.Below in conjunction with the accompanying drawings embodiments of the invention are described in detail.
Embodiment
See Fig. 1, Fig. 2:
(1) blanking base
Determine that according to target part the size of blank, described blank are cylindrical shape 20CrMo rod iron, and be filled substantially with mold cavity, to ensure the crossed-axis differential blank of forming dimension longer dimension.
(2) blank crystal grain nanorize
Due to Equal-channel Angular Pressing have do not change blank geometry and can effective crystal grain thinning, the 20CrMo cylindrical shape rod iron of intended size is obtained nanometer high intensity rod iron blanks by 45 ° of turning Equal-channel Angular Pressing crystal grain refinements.
(3) blank heating, lubrication and mould the pre-heat treatment
(1) in the dilute sulfuric acid aqueous solution of the 10-20% of 50-60 DEG C, ceaselessly roll blank 18 pickling about 10 minutes, then use flowing clean water three minutes.
(2) graphite on the surface of cleaned blank 18 water preparation, the most first the blank 18 coated be preheated to about 160 DEG C, then proceeded in vacuum heat treatment furnace, be heated in 10s 700 DEG C,
(3) mould is preheated to 200 DEG C
(4) continuous warm-extrusion forming crossed-axis differential blank
See Fig. 3, this mould uses and puts on die, it is placed on ferrous metal vertical extruder or horizontal metal Form-bar Press Machine, blank is placed in the die of mold for extruding and forming and it is carried out continuous uniform extruding, blank is made to be full of concave die cavity, metal stock carries out continuously extruded in the extrusion chamber of temperature extension mould, and subsequently after forming cavity internal shaping, the crossed-axis differential blank after shaping is taken out by above upper mold bore.
This blank is characterised by: one be blank be the blank of a warm-extrusion forming longer dimension, an extrusion molding, it is to avoid repeatedly extrude, improve working (machining) efficiency；Two is that the intermediate connector of blank is cylinder and is provided with center hole, and the planetary gear axle arranged in cross is cuboid, sees Fig. 4.
(5) line cutting forming more than one piece crossed-axis differential semi-finished articles
See Fig. 5, process fork universal joint forming process schematic three dimensional views, the blank after continuous warm-extrusion forming for the present invention, according to the width dimensions requirement of crossed-axis differential finished parts, use the method for line cutting to be processed into more than one piece crossed-axis differential semi-finished articles.
(6) carry out semi-finished articles one by one being cut into finished parts.
The semi-finished articles that will cut down, according to crossed-axis differential dimensional requirement, the cross cuboid axle of the cross axle semi-finished articles after line is cut machining cylindrical planetary gear axle respectively, and then semi-finished articles is processed into finished parts, shown in Figure 5.
Equipment needed thereby of the present invention is ferrous metal vertical extruder or horizontal metal Form-bar Press Machine.
Claims (3)
1. the technique processing high intensity 20CrMo crossed-axis differential and mould, it is characterized in that: obtain nanometer high intensity blank by severe plastic deformation technology, then by an extrusion molding strip crossed-axis differential major cross-sectional axis class blank, avoid repeatedly extruding, it is provided that a kind of process high intensity 20CrMo crossed-axis differential technique and Tool and Die Technology.
A kind of technique processing high intensity 20CrMo crossed-axis differential the most according to claim 1 and mould, it is characterized in that: due to Equal-channel Angular Pressing have do not change blank geometry and can effective crystal grain thinning, the cylindrical shape 20CrMo rod iron of intended size is obtained 20CrMo nanometer high intensity rod iron blanks by 45 ° of turning Equal-channel Angular Pressing crystal grain refinements.
A kind of technique processing high intensity 20CrMo crossed-axis differential the most according to claim 1 and mould, it is characterized in that: Warm Extrusion is to cross acquisition progressive forming process by extruding continuously, 20CrMo blank is a warm-extrusion forming strip crossed-axis differential cross section blank, avoid repeatedly extruding, if the enough multipotencys of blank obtain the crossed-axis differential major cross-sectional axis class blank of endless, improve working (machining) efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610477127.1A CN105904170A (en) | 2016-06-27 | 2016-06-27 | Technology and die for processing high-strength 20CrMo universal joint pin differential mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610477127.1A CN105904170A (en) | 2016-06-27 | 2016-06-27 | Technology and die for processing high-strength 20CrMo universal joint pin differential mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN105904170A true CN105904170A (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610477127.1A Pending CN105904170A (en) | 2016-06-27 | 2016-06-27 | Technology and die for processing high-strength 20CrMo universal joint pin differential mechanism |
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| CN (1) | CN105904170A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624174A (en) * | 2016-12-13 | 2017-05-10 | 山西平阳重工机械有限责任公司 | Precision machining method for long and thin shaft of cross-shaped wing bearing |
| CN108789887A (en) * | 2018-06-27 | 2018-11-13 | 江阴兰雷新能源科技有限公司 | A kind of cross silicon core cutting method of entirety |
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|---|---|---|---|---|
| CN1039544A (en) * | 1989-04-08 | 1990-02-14 | 湖北省万向节厂 | Blank of cross axle moulding process and mould |
| AU4430993A (en) * | 1993-06-03 | 1994-12-15 | Zeller Corporation, The | Variable size seal for universal joints |
| JP2001321825A (en) * | 2000-05-18 | 2001-11-20 | Toto Ltd | Method and device for working metallic material |
| CN102773299A (en) * | 2011-05-10 | 2012-11-14 | 宁波佳比佳工贸有限公司 | Cross-axle cold extrusion die |
| CN102785064A (en) * | 2012-06-28 | 2012-11-21 | 宝钢不锈钢有限公司 | Method for processing cross axle |
| CN103028630A (en) * | 2012-12-14 | 2013-04-10 | 北京理工大学 | Equal channel angular pressing structure with lateral turn angle of 45 degrees |
| CN103111815A (en) * | 2013-02-28 | 2013-05-22 | 重庆路畅汽车配件有限公司 | Secondary synchronous cold extruding forming production method for cross axles of automobile differentials and planetary reducers |
| CN103567247A (en) * | 2013-11-26 | 2014-02-12 | 山东建筑大学 | Novel warm extrusion method for efficiently processing internal-tooth cylindrical gears |
-
2016
- 2016-06-27 CN CN201610477127.1A patent/CN105904170A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039544A (en) * | 1989-04-08 | 1990-02-14 | 湖北省万向节厂 | Blank of cross axle moulding process and mould |
| AU4430993A (en) * | 1993-06-03 | 1994-12-15 | Zeller Corporation, The | Variable size seal for universal joints |
| JP2001321825A (en) * | 2000-05-18 | 2001-11-20 | Toto Ltd | Method and device for working metallic material |
| CN102773299A (en) * | 2011-05-10 | 2012-11-14 | 宁波佳比佳工贸有限公司 | Cross-axle cold extrusion die |
| CN102785064A (en) * | 2012-06-28 | 2012-11-21 | 宝钢不锈钢有限公司 | Method for processing cross axle |
| CN103028630A (en) * | 2012-12-14 | 2013-04-10 | 北京理工大学 | Equal channel angular pressing structure with lateral turn angle of 45 degrees |
| CN103111815A (en) * | 2013-02-28 | 2013-05-22 | 重庆路畅汽车配件有限公司 | Secondary synchronous cold extruding forming production method for cross axles of automobile differentials and planetary reducers |
| CN103567247A (en) * | 2013-11-26 | 2014-02-12 | 山东建筑大学 | Novel warm extrusion method for efficiently processing internal-tooth cylindrical gears |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624174A (en) * | 2016-12-13 | 2017-05-10 | 山西平阳重工机械有限责任公司 | Precision machining method for long and thin shaft of cross-shaped wing bearing |
| CN106624174B (en) * | 2016-12-13 | 2018-10-12 | 山西平阳重工机械有限责任公司 | A kind of precision machining method of cross wing bearing elongated shaft |
| CN108789887A (en) * | 2018-06-27 | 2018-11-13 | 江阴兰雷新能源科技有限公司 | A kind of cross silicon core cutting method of entirety |
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Application publication date: 20160831 |