CN105057380A - Cold-extrusion mold for asymmetrical spline shaft - Google Patents
Cold-extrusion mold for asymmetrical spline shaft Download PDFInfo
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- CN105057380A CN105057380A CN201510478844.1A CN201510478844A CN105057380A CN 105057380 A CN105057380 A CN 105057380A CN 201510478844 A CN201510478844 A CN 201510478844A CN 105057380 A CN105057380 A CN 105057380A
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Abstract
The invention discloses a cold-extrusion mold for an asymmetrical spline shaft. The cold-extrusion mold comprises an upper die, a middle die and a lower die which are coaxial to one another, wherein the upper die is mounted on an upper working platform of an oil press and comprises an upper die base and an internal spline extrusion die; the internal spline extrusion die is mounted below the upper die base; the middle die and the lower die are mounted on a lower working platform of the oil press; the upper and lower parts of the middle die and the lower die are engaged with each other; an ejector rod guide sleeve is mounted at the bottom end of the lower die; an ejector rod is mounted at the axis of the ejector rod guide sleeve. The cold-extrusion mold disclosed by the invention can be used for guaranteeing that the line profile and the surface profile of a produced asymmetrical spline shaft can reach the machining precision and depth required by drawings.
Description
Technical field
The present invention relates to mould applications, particularly relate to a kind of cold extrusion die.
Background technology
Along with the universal of automobile and development, the performance requirement of people to automobile is more and more higher.Automobile electric booster steering system is the power steering system that a kind of direct dependence motor provides auxiliary torque, compared with traditional hydraulic power-assist steering system, electric boosting steering system has lot of advantages: one, only when needs turn to, ability starter motor produces power-assisted, can reduce engine fuel consumption; Two, best power-assisted can be provided under various driving cycle, the Driving Torque reducing motor caused by Uneven road by the effect of transmission device power-assisted to the disturbance being, improve the steering characteristic of automobile, improve the active safety of automobile; Three, do not have hydraulic circuit, adjustment and detection are easier, and assembly automation degree is higher, and by arranging different programs, mates fast with different automobile types, shorten and produce and the construction cycle; Four, there is not Leakage, reduce the pollution to environment.Therefore, electric boosting steering system is a development trend of following power steering system.
Output shaft is the core part in electric power steering system of automobile, and the kind profile of output shaft is various, wherein has a kind of two ends of output shaft to be asymmetric spline, processes the difficult problem that asymmetric splined shaft is machinery industry.Precise cold extrusion technique at normal temperatures metal material is put into die cavity, by applying certain pressure, makes Plastic Deformation of Metal Materials become to meet a kind of cold-extrusion technology of drawing requirement.In the process of producing asymmetric splined shaft, metal material amount of flow is uneven, extruding force namely can be caused uneven and mould is ruptured.Under the prerequisite not changing drawing requirement, overcome metal material flowing, extruding force is uneven is manufacture a difficult problem of asymmetric splined shaft.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of asymmetric splined shaft cold extrusion die, can guarantee that the line profile of asymmetric splined shaft produced and facial contour can reach machining accuracy required by drawing and the degree of depth.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of asymmetric splined shaft cold extrusion die is provided, comprises coaxial patrix, middle mould and counterdie; Described patrix is installed on the upper workbench of hydraulic press, and described patrix comprises upper bolster and internal spline extrusion die, and described internal spline extrusion die is arranged on the below of upper bolster; Described middle mould and described counterdie are installed on the lower workbench of hydraulic press, and described middle mould agrees with up and down mutually with described counterdie, and the bottom of described counterdie is provided with push rod guide pin bushing, are provided with push rod in the axle center of described push rod guide pin bushing.
In a preferred embodiment of the present invention, described internal spline extrusion die is fixed on the lower end of described upper bolster by holding screw.
In a preferred embodiment of the present invention, the shaft length of the stroke that described patrix extrudes downwards and part matches.
In a preferred embodiment of the present invention, press liftout tank is installed immediately below described push rod.
The invention has the beneficial effects as follows:
(1) a kind of asymmetric splined shaft cold extrusion die of the present invention, include coaxial patrix, middle mould and counterdie, patrix is driven by the upper workbench of hydraulic press and presses down, interact with the mould agreed with mutually be arranged on lower workbench, counterdie, cold extrusion obtains finished product splined shaft, the present invention can overcome the material brought when extruding the irregular spline of abnormity and to flow a uneven difficult problem, ensure that spline line profile and facial contour can reach machining accuracy required by drawing and the degree of depth;
(2) the present invention is used to produce asymmetric splined shaft for once to have extruded, complete the processing of internal spline and part outer simultaneously, improve the coaxial accuracy of internal spline to part outer, provide conveniently to the processing of next procedure, drastically increase product quality;
(3) after adopting the present invention, produce raw material used and be saved, simultaneously because extruding reduces machine cut number of times, save the time of Liao Hou road Vehicle Processing, on the other hand, ensure that later process is to part processing precision requirement.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of the present invention;
Fig. 2 is the structural representation of patrix in Fig. 1;
Fig. 3 uses the part blank structural representation before the present invention's processing;
Fig. 4 is the structural representation of part blank after the processing of preferred embodiment shown in Fig. 1 in Fig. 3;
Fig. 5 is the B-B cross section structure schematic diagram of Fig. 4;
In accompanying drawing, the mark of each parts is as follows: 1, patrix, and 11, upper bolster, 12, holding screw, 13, internal spline extrusion die, 2, middle mould, 3, counterdie, 4, push rod guide pin bushing, 5, push rod, 6, press liftout tank.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
As shown in Figures 1 and 2, a kind of asymmetric splined shaft cold extrusion die, comprises coaxial patrix 1, middle mould 2 and counterdie 3; Patrix 1 is installed on the upper workbench of hydraulic press, and middle mould 2 and counterdie 3 are installed on the lower workbench of hydraulic press; Patrix 1, middle mould 2, counterdie 3 are all provided with the die cavity matched with splined shaft, the stroke of upper workbench and the length of splined shaft of hydraulic press match, workpiece is put into the die cavity of mould 2, upper workbench presses down with patrix 1, has coordinated the manufacturing process of the asymmetric spline of the abnormity of axle with middle mould 2, counterdie 3.Middle mould 2 agrees with mutually with counterdie about 3, and the bottom of counterdie 3 is provided with push rod guide pin bushing 4, is provided with push rod 5 in the axle center of push rod guide pin bushing 4, is provided with press liftout tank 6 immediately below push rod 5.
Patrix 1 comprises upper bolster 11 and internal spline extrusion die 13, and internal spline extrusion die 13 is fixed on the lower end of upper bolster 11 by holding screw 12.
The course of work of the present invention:
After mould 2 die cavity put into by blank part as shown in Figure 3 (blank part has one end of endoporus upwards), upper workbench is pressed downwardly onto certain position with internal spline extrusion die 13, and the first half of blank part enters the die cavity of counterdie 3.At this moment upper bolster 11 drives internal spline extrusion die 13 to continue to be pressed downwardly onto certain position, when internal spline extrusion die 13 enters the endoporus of blank part, upper bolster 11 continues to pressing down, the endoporus of blank part starts plasticity change occurs, when in, in lower mode cavity without extensible leeway, hair training inner bore of part can only stretch in the die cavity of middle mould 2.As shown in figs. 4 and 5, the special-shaped internal spline squeezed out be ensure that the precision of their axialities by mould.Meanwhile, when part has extruded, cooperated with press liftout tank 6 by push rod 5, part is ejected middle mould 2 and counterdie 3, take out with handled easily work.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. an asymmetric splined shaft cold extrusion die, is characterized in that, comprises coaxial patrix, middle mould and counterdie; Described patrix is installed on the upper workbench of hydraulic press, and described patrix comprises upper bolster and internal spline extrusion die, and described internal spline extrusion die is arranged on the below of upper bolster; Described middle mould and described counterdie are installed on the lower workbench of hydraulic press, and described middle mould agrees with up and down mutually with described counterdie, and the bottom of described counterdie is provided with push rod guide pin bushing, are provided with push rod in the axle center of described push rod guide pin bushing.
2. asymmetric splined shaft cold extrusion die according to claim 1, is characterized in that, described internal spline extrusion die is fixed on the lower end of described upper bolster by holding screw.
3. asymmetric splined shaft cold extrusion die according to claim 1, it is characterized in that, the shaft length of the stroke that described patrix extrudes downwards and part matches.
4. asymmetric splined shaft cold extrusion die according to claim 1, is characterized in that, be provided with press liftout tank immediately below described push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510478844.1A CN105057380A (en) | 2015-08-03 | 2015-08-03 | Cold-extrusion mold for asymmetrical spline shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510478844.1A CN105057380A (en) | 2015-08-03 | 2015-08-03 | Cold-extrusion mold for asymmetrical spline shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105057380A true CN105057380A (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510478844.1A Pending CN105057380A (en) | 2015-08-03 | 2015-08-03 | Cold-extrusion mold for asymmetrical spline shaft |
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| CN (1) | CN105057380A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114523021A (en) * | 2022-01-24 | 2022-05-24 | 上海中航实业(集团)有限公司 | Oil press |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5507167A (en) * | 1993-04-27 | 1996-04-16 | Gkn Automotive Ag | Process and device for providing a shaft with splines |
| CN2362606Y (en) * | 1999-03-27 | 2000-02-09 | 滕宏春 | Composite mould for one-step cold-extrusion formation of multi-section spline shouldered shaft |
| CN101081410A (en) * | 2007-07-04 | 2007-12-05 | 陈丽 | 125CC autobicycle gear shifting box technics layshaft multiple spline one-time cold extrusion processing technics |
| CN202137312U (en) * | 2011-06-20 | 2012-02-08 | 重庆创精温锻成型有限公司 | Cold-extrusion die for output spline shaft of automobile automatic transmission |
| CN202238993U (en) * | 2011-09-28 | 2012-05-30 | 重庆秋田齿轮有限责任公司 | Device for processing auxiliary shaft of motorcycle gearbox |
| CN104741403A (en) * | 2015-03-20 | 2015-07-01 | 毛水忠 | Extrusion forming method by use of solid bar and cold extruding device |
| CN204892582U (en) * | 2015-08-03 | 2015-12-23 | 常熟市金华机械股份有限公司 | Asymmetric integral key shaft cold extruding die |
-
2015
- 2015-08-03 CN CN201510478844.1A patent/CN105057380A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5507167A (en) * | 1993-04-27 | 1996-04-16 | Gkn Automotive Ag | Process and device for providing a shaft with splines |
| CN2362606Y (en) * | 1999-03-27 | 2000-02-09 | 滕宏春 | Composite mould for one-step cold-extrusion formation of multi-section spline shouldered shaft |
| CN101081410A (en) * | 2007-07-04 | 2007-12-05 | 陈丽 | 125CC autobicycle gear shifting box technics layshaft multiple spline one-time cold extrusion processing technics |
| CN202137312U (en) * | 2011-06-20 | 2012-02-08 | 重庆创精温锻成型有限公司 | Cold-extrusion die for output spline shaft of automobile automatic transmission |
| CN202238993U (en) * | 2011-09-28 | 2012-05-30 | 重庆秋田齿轮有限责任公司 | Device for processing auxiliary shaft of motorcycle gearbox |
| CN104741403A (en) * | 2015-03-20 | 2015-07-01 | 毛水忠 | Extrusion forming method by use of solid bar and cold extruding device |
| CN204892582U (en) * | 2015-08-03 | 2015-12-23 | 常熟市金华机械股份有限公司 | Asymmetric integral key shaft cold extruding die |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114523021A (en) * | 2022-01-24 | 2022-05-24 | 上海中航实业(集团)有限公司 | Oil press |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151118 |
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| RJ01 | Rejection of invention patent application after publication |