CN107537907A - A kind of forming method of automotive transmission pilot sleeve - Google Patents
A kind of forming method of automotive transmission pilot sleeve Download PDFInfo
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- CN107537907A CN107537907A CN201610487774.0A CN201610487774A CN107537907A CN 107537907 A CN107537907 A CN 107537907A CN 201610487774 A CN201610487774 A CN 201610487774A CN 107537907 A CN107537907 A CN 107537907A
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- steel pipe
- metal steel
- pilot sleeve
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- bulging
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Abstract
The invention provides a kind of forming method of automotive transmission pilot sleeve, comprise the following steps：Blanking, intercept metal steel pipe；The draw, using machine for shrinking to carrying out the draw in the middle part of metal steel pipe；Bulging, metal steel pipe is placed in finished product die, injects liquid medium into metal steel pipe, metal steel pipe is expanded outwardly to the outer wall of the metal steel pipe and be bonded with the inwall of the finished product die；Bulk-breaking, by metal steel pipe therefrom between disjunction, obtain two shape identical parts to be processed；Axis hole is processed, two parts to be processed are sequentially arranged on lathe to process axis hole；Punch forming, two parts to be processed are installed in punch-forming mold and carry out punch forming；Hole slot is processed, so as to obtain the pilot sleeve of two complete automotive transmissions.The present invention can mitigate the weight of pilot sleeve, save material.The present invention can improve the machining accuracy of pilot sleeve, reduce rigging error accumulation, improve product quality, improve the strength and stiffness of pilot sleeve.
Description
Technical field
The present invention relates to technical field of vehicle, especially a kind of forming method of automotive transmission pilot sleeve.
Background technology
With the continuous development of the industry such as automobile, Aeronautics and Astronautics, lightweight structure energy consumption and is subtracted with saving material, reducing
Gently seem and become more and more important the advantages that pollution, and one of developing direction as Modern Manufacturing Technology.Realizing structure lightened has
Two main paths:First, light material, such as aluminium alloy, magnesium alloy, titanium alloy, engineering plastics, composite are used, and this
Costly, production cost is higher for a little materials；Second, using brand-new design concept and method and develop what is be adapted therewith
Production technology, solid component is such as replaced with hollow non-uniform member, can not only mitigate weight but also the intensity of material can be made full use of
And rigidity.Both are comparatively, the latter obviously has more preferable development prospect.
Under the driving of industrial requirement, arisen at the historic moment simultaneously as the tube hydroforming process for processing hollow non-uniform member
It is of increasing concern.Meanwhile the breakthrough of two aspect key technologies promotes the fast development of the technology again：First, superelevation presses
Sealing Technology, by selecting meticulously, rationally designing sealing structure form, it is entirely capable of realizing 400~600MPa under working condition, it is special
The stabilized seal of different occasion 1500MPa super-pressure；Second, super-pressure Computer Control Technology, with control theory and computer skill
The continuous development of art and perfect, it is entirely capable of realizing to giving the high-precision tracking of loading curve.
Publication No. CN101045246 Chinese patent discloses a kind of method for forming pipe fitting, for existing formation of tubes
The problem of method equipment manufacturing cost is high, machining control difficulty is high and invent, it includes step：One tubing is bent to form specific outer
One processing pipe fitting of shape；At least one filling fluid is injected into the processing inside pipe fitting, and closes two ends of the processing pipe fitting；Utilize
One punching die device carries out punching press to the processing pipe fitting, to form a moulding pipe of given configuration；And open the formed pipe
At least one end of part, to exclude the filling fluid of the moulding pipe inside.The invention compared with prior art, being capable of relative reduction
Manufacture degree of difficulty and reduce equipment cost, reduce the difficulty of machining control, while be able to ensure that pipe fitting processing quality.
However, the weight of the pipe fitting obtained by the contrast patent is still higher, and the pipe obtained using stamping technology
Part precision cannot be guaranteed.
The content of the invention
It is an object of the invention to provide the automotive transmission of a kind of weight for reducing pilot sleeve and guarantee machining accuracy
The forming method of pilot sleeve.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：
A kind of forming method of automotive transmission pilot sleeve, comprises the following steps：
Blanking, according to the length of required pilot sleeve, intercept metal steel pipe；
The draw, the draw is carried out to the middle part of the metal steel pipe using machine for shrinking, obtains the metal steel pipe after the draw；
Bulging, the metal steel pipe after the draw is placed in finished product die, liquid is injected into the metal steel pipe and is situated between
Matter, the metal steel pipe is expanded outwardly to the outer wall of the metal steel pipe and be bonded with the inwall of the finished product die, so as to obtain
Obtain the metal steel pipe after bulging；
Bulk-breaking, the axis of the metal steel pipe from the middle part of the metal steel pipe after the bulging and after the bulging will
Metal steel pipe disjunction after the bulging, so as to obtain two shape identical parts to be processed；
Axis hole is processed, described two parts to be processed are sequentially arranged on corresponding lathe to process axis hole, so as to obtain
Two parts to be processed that must be processed after axis hole；
Punch forming, two parts to be processed after the processing axis hole are installed in punch-forming mold to be rushed
Molded, the punch forming is specifically to form little groove in the top of the parts to be processed, after obtaining punch forming
Two parts to be processed；
Hole slot is processed, two parts to be processed after the punch forming are respectively placed in corresponding hole slot processing mold
To process hole slot, so as to obtain the pilot sleeve of two complete automotive transmissions.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement：
Alternatively, in blanking step, the cross section of the metal steel pipe is circle, and the length of the metal steel pipe of interception is
150mm-200mm。
Alternatively, the bulging step is specifically to inject liquid medium into the metal steel pipe using extra high voltage system,
Apply axial load to the both ends of the metal steel pipe simultaneously, to cause the metal steel pipe to expand outwardly to the metal steel pipe
Outer wall be bonded with the inwall of the finished product die.
Alternatively, the bulging step is cold-formed.
Alternatively, in the processing hole slot step, processing hole slot is specially punching groove or laser cutting hole slot.
Alternatively, in the bulging step, the both ends of the metal steel pipe are sealed using horizontal punch.
Alternatively, the axial compressive force needed for the bulging step is 800-1200Mpa.
Alternatively, the metal steel pipe uses metal light wall pipe.
Alternatively, need to cut the both ends rim charge of the metal steel pipe after the bulging before the bulk-breaking step
Remove.
Alternatively, for the pilot sleeve of the automotive transmission obtained after processing hole slot step, in addition to machining
The step of.
Beneficial effects of the present invention：
, can be with respect to stamping parts 1. the present invention uses the pilot sleeve obtained by hydroforming process as hollow shaft type parts
Mitigate 40%-50% weight, so as to save material；
2. the present invention uses pilot sleeve made from hydroforming process, the strength and stiffness of pilot sleeve can be improved,
Especially fatigue strength can significantly improve；
3. the present invention prepares pilot sleeve using hydroforming process, 1 mold is only needed, with respect to punch forming process system
More molds that standby technique needs, can greatly reduce number of parts, so as to save die cost；
4. pilot sleeve global formation produced by the present invention, it is possible to reduce subsequent mechanical is processed and assembly welding amount, simplifies
Production procedure, improve production efficiency；
5. the present invention can improve the machining accuracy of pilot sleeve, rigging error accumulation is reduced, product quality can be improved；
6. the present invention is communicated using pilot sleeve both ends made from hydroforming process, can improve inside pilot sleeve
Gas flow characteristic；
7. the present invention can obtain two duplicate pilot sleeves in a preparation process, when greatling save
Between, improve production efficiency.
Brief description of the drawings
Fig. 1 is the process chart of the forming method of the automotive transmission pilot sleeve of the present invention；
Fig. 2 is structural representation of the parts to be processed of the embodiment of the present invention after axis hole step is processed；
Fig. 3 is structural representation of the parts to be processed of the embodiment of the present invention after punch forming step；
Fig. 4 is structural representation of the parts to be processed of the embodiment of the present invention after hole slot step is processed；
Fig. 5 is the structural representation of the pilot sleeve prepared by the forming method of the embodiment of the present invention.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
The present invention uses the pilot sleeve obtained by hydroforming process to subtract with respect to stamping parts for hollow shaft type parts
Light 40%-50% weight, so as to save material；
The present invention uses pilot sleeve made from hydroforming process, can improve the strength and stiffness of pilot sleeve, especially
It is that fatigue strength can significantly improve；
When the present invention prepares pilot sleeve using hydroforming process, 1 mold is only needed, is prepared with respect to punch forming process
More molds that technique needs, can greatly reduce number of parts, so as to save die cost；
Pilot sleeve global formation produced by the present invention, it is possible to reduce subsequent mechanical is processed and assembly welding amount, simplifies life
Flow is produced, improves production efficiency；
The present invention can improve the machining accuracy of pilot sleeve, reduce rigging error accumulation, can improve product quality；
The present invention is communicated using pilot sleeve both ends made from hydroforming process, can improve the gas inside pilot sleeve
Body flow behavior；
The present invention can obtain two duplicate pilot sleeves in a preparation process, greatly save the time,
Improve production efficiency.
Fig. 1 is the process chart of the forming method of the automotive transmission pilot sleeve of the present invention.Referring to Fig. 1, the present invention
A kind of forming method of automotive transmission pilot sleeve is provided, is comprised the following steps：
Step 1, blanking, according to the length of required pilot sleeve, interception metal steel pipe 1.The cross section of the metal steel pipe 1
For circle, the length of the metal steel pipe 1 of interception is 150mm-200mm.
The metal steel pipe 1 uses metal light wall pipe.
Step 2, the draw, the draw is carried out to the middle part of the metal steel pipe 1 using machine for shrinking, obtains the metallic steel after the draw
Pipe 1.
Step 3, bulging, the metal steel pipe 1 after the draw is placed in finished product die, noted into the metal steel pipe 1
Enter liquid medium, the metal steel pipe 1 is expanded outwardly to the outer wall of the metal steel pipe 1 and the inwall patch of the finished product die
Close, so as to obtain the metal steel pipe 1 after bulging.
The bulging step is specifically to inject liquid medium into the metal steel pipe 1 using extra high voltage system, while to
The both ends of the metal steel pipe 1 apply axial load, to cause the metal steel pipe 1 to expand outwardly to the metal steel pipe 1
Outer wall is bonded with the inwall of the finished product die.
Finished product die includes two parts, respectively mold and lower mould.Metal steel pipe 1 is placed in lower mould, upper mould
Have descending, then Guan Bi mould, makes metal steel pipe 1 be placed between mold and lower mould, and applies mold clamping force to it, with that
Carry out bulging step.After bulging step terminates, release is carried out to metal steel pipe 1, and removes its mold clamping force, drift is retracted, molds
Take out metal steel pipe 1.
The process of bulging can be divided into three phases：
A. the stage is filled, metal steel pipe 1 is placed in the lower mould of finished product die, upper mould is then closed, using super-pressure system
Unite and inject liquid medium into metal steel pipe 1, make the inside of metal steel pipe 1 hydraulically full, side by side except gas, by metal steel pipe 1
Both ends are sealed using horizontal punch；
B. formative stage, while to liquid pressing bulging in metal steel pipe 1, the drift at the both ends of metal steel pipe 1 according to
The loading curve of setting inwardly promotes feed supplement, makes the outer wall of metal steel pipe 1 basic under the synergy of internal pressure and axial supplement
Adhesive product mould, at this moment most of region in addition to transition region fillet be molded；
C. truing phase, improving the pressure inside metal steel pipe 1 makes the complete adhesive product mould of transition region fillet and is molded
For required workpiece, this stage does not have feed supplement substantially.
The bulging step is cold-formed.
Axial compressive force needed for the bulging step is 800-1200Mpa, it is therefore desirable to the both ends of metal steel pipe 1
Apply axial feed, the specific amount of feeding needs to be determined on a case-by-case basis.
Step 4, bulk-breaking, the metal steel pipe 1 from the middle part of the metal steel pipe 1 after the bulging and after the bulging
Axis by the disjunction of metal steel pipe 1 after the bulging, so as to obtain two shape identical parts to be processed.It can so reach
To material is saved, the purpose of operating efficiency is improved.
Need to cut off the both ends rim charge of the metal steel pipe 1 after the bulging before the bulk-breaking step.
Step 5, processing axis hole 2, described two parts to be processed are sequentially arranged on corresponding lathe to process axis hole
2, so as to obtain two parts to be processed after processing axis hole 2.Fig. 2 is the parts to be processed of the embodiment of the present invention in processing axis hole
Structural representation after 2 steps.The axis hole 2 is at the longitudinal center line of the parts to be processed and in the longitudinal center line
It is mutually perpendicular to.
Step 6, punch forming, two parts to be processed after the processing axis hole 2 are installed in punch-forming mold
To carry out punch forming, the punch forming is specifically to form little groove in the top of the parts to be processed, so as to be rushed
Two parts to be processed after molded.Little groove, Ke Yi great are formed in the parts to be processed by precise punch forming
The big bulging pressure reduced needed for bulging step.Fig. 3 is the parts to be processed of the embodiment of the present invention after punch forming step
Structural representation.Referring to Fig. 3, the part in figure corresponding to A is the little groove in the parts to be processed.
Step 7, processing hole slot 3.Fig. 4 is structure of the parts to be processed of the embodiment of the present invention after the step of hole slot 3 is processed
Schematic diagram.Referring to Fig. 4, two parts to be processed after the punch forming are respectively placed in the corresponding processing mold of hole slot 3
To process hole slot 3, so as to obtain the pilot sleeve of two complete automotive transmissions.
It is specially punching groove 3 or laser cutting hole slot 3 to process hole slot 3.
Step 8, machining.Machining is specifically that the pilot sleeve is entered on the basis of abovementioned steps completion
One step improves processing.Fig. 5 is the structural representation of the pilot sleeve prepared by the forming method of the embodiment of the present invention.Referring to Fig. 5,
Complete pilot sleeve as after over mechanical processing.The planform design of the pilot sleeve of the present invention is more flexible, excellent
Change, the design that special forming ability is molded sleeve hydraulic is more flexible.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of forming method of automotive transmission pilot sleeve, it is characterised in that comprise the following steps：
Blanking, according to the length of required pilot sleeve, intercept metal steel pipe；
The draw, the draw is carried out to the middle part of the metal steel pipe using machine for shrinking, obtains the metal steel pipe after the draw；
Bulging, the metal steel pipe after the draw is placed in finished product die, injects liquid medium into the metal steel pipe, make
The outer wall that the metal steel pipe expands outwardly to the metal steel pipe is bonded with the inwall of the finished product die, so as to obtain bulging
Metal steel pipe afterwards；
Bulk-breaking, from the axis of the middle part of the metal steel pipe after the bulging and the metal steel pipe after the bulging by described in
Metal steel pipe disjunction after bulging, so as to obtain two shape identical parts to be processed；
Axis hole is processed, described two parts to be processed are sequentially arranged on corresponding lathe to process axis hole, so as to be added
Two parts to be processed after work axis hole；
Punch forming, two parts to be processed after the processing axis hole are installed in punch-forming mold to be struck out
Type, the punch forming is specifically to form little groove in the top of the parts to be processed, so as to obtain two after punch forming
Individual parts to be processed；
Hole slot is processed, two parts to be processed after the punch forming are respectively placed in corresponding hole slot processing mold to add
Work hole slot, so as to obtain the pilot sleeve of two complete automotive transmissions.
2. the forming method of automotive transmission pilot sleeve according to claim 1, it is characterised in that in blanking step
In, the cross section of the metal steel pipe is circle, and the length of the metal steel pipe of interception is 150mm-200mm.
3. the forming method of automotive transmission pilot sleeve according to claim 1 or 2, it is characterised in that the bulging
Step is specifically to inject liquid medium into the metal steel pipe using extra high voltage system, while to the both ends of the metal steel pipe
Apply axial load, to cause the metal steel pipe to expand outwardly in outer wall and the finished product die of the metal steel pipe
Wall is bonded.
4. the forming method of the automotive transmission pilot sleeve according to any one of claim 1-3, it is characterised in that institute
It is cold-formed to state bulging step.
5. the forming method of the automotive transmission pilot sleeve according to any one of claim 1-4, it is characterised in that institute
State in processing hole slot step, processing hole slot is specially punching groove or laser cutting hole slot.
6. the forming method of the automotive transmission pilot sleeve according to any one of claim 1-5, it is characterised in that institute
State in bulging step, the both ends of the metal steel pipe are sealed using horizontal punch.
7. the forming method of the automotive transmission pilot sleeve according to any one of claim 1-6, it is characterised in that institute
It is 800-1200Mpa to state the axial compressive force needed for bulging step.
8. the forming method of the automotive transmission pilot sleeve according to any one of claim 1-7, it is characterised in that institute
State metal steel pipe and use metal light wall pipe.
9. the forming method of the automotive transmission pilot sleeve according to any one of claim 1-8, it is characterised in that
Need to cut off the both ends rim charge of the metal steel pipe after the bulging before the bulk-breaking step.
10. the forming method of the automotive transmission pilot sleeve according to any one of claim 1-9, it is characterised in that
For the pilot sleeve of the automotive transmission obtained after processing hole slot step, in addition to the step of machining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610487774.0A CN107537907A (en) | 2016-06-28 | 2016-06-28 | A kind of forming method of automotive transmission pilot sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610487774.0A CN107537907A (en) | 2016-06-28 | 2016-06-28 | A kind of forming method of automotive transmission pilot sleeve |
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| Publication Number | Publication Date |
|---|---|
| CN107537907A true CN107537907A (en) | 2018-01-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610487774.0A Pending CN107537907A (en) | 2016-06-28 | 2016-06-28 | A kind of forming method of automotive transmission pilot sleeve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112172994A (en) * | 2020-09-25 | 2021-01-05 | 升励五金（深圳）有限公司 | Bicycle stem and method of making same |
| CN112249211A (en) * | 2020-09-25 | 2021-01-22 | 升励五金（深圳）有限公司 | Bicycle front fork structure and manufacturing method thereof |
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| JPH0938729A (en) * | 1995-07-27 | 1997-02-10 | Kawasaki Steel Corp | Production of tapered steel pipe and device therefor |
| JP4133465B2 (en) * | 2003-03-10 | 2008-08-13 | 新日本製鐵株式会社 | Hydroform processing method |
| CN101570135A (en) * | 2008-04-29 | 2009-11-04 | 起亚自动车株式会社 | Tail trim assembly of exhaust pipe for vehicle and method of manufacturing the same |
| CN101879565A (en) * | 2010-06-04 | 2010-11-10 | 衡阳连续运输机械有限公司 | Manufacturing method of welded steel pipe-free integrally formed automobile transaxle housing |
| CN102228932A (en) * | 2011-04-22 | 2011-11-02 | 哈尔滨工业大学 | Forming method for improving stepped hollow reducing pipe wall thickness uniformity |
| CN102319826A (en) * | 2011-07-14 | 2012-01-18 | 燕山大学 | Steel tube swelling press forming method for large-sized automobile axle housing |
-
2016
- 2016-06-28 CN CN201610487774.0A patent/CN107537907A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0938729A (en) * | 1995-07-27 | 1997-02-10 | Kawasaki Steel Corp | Production of tapered steel pipe and device therefor |
| JP4133465B2 (en) * | 2003-03-10 | 2008-08-13 | 新日本製鐵株式会社 | Hydroform processing method |
| CN101570135A (en) * | 2008-04-29 | 2009-11-04 | 起亚自动车株式会社 | Tail trim assembly of exhaust pipe for vehicle and method of manufacturing the same |
| CN101879565A (en) * | 2010-06-04 | 2010-11-10 | 衡阳连续运输机械有限公司 | Manufacturing method of welded steel pipe-free integrally formed automobile transaxle housing |
| CN102228932A (en) * | 2011-04-22 | 2011-11-02 | 哈尔滨工业大学 | Forming method for improving stepped hollow reducing pipe wall thickness uniformity |
| CN102319826A (en) * | 2011-07-14 | 2012-01-18 | 燕山大学 | Steel tube swelling press forming method for large-sized automobile axle housing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112172994A (en) * | 2020-09-25 | 2021-01-05 | 升励五金（深圳）有限公司 | Bicycle stem and method of making same |
| CN112249211A (en) * | 2020-09-25 | 2021-01-22 | 升励五金（深圳）有限公司 | Bicycle front fork structure and manufacturing method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180105 |
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