CN204074771U - A kind of Cold Extrusion Punch of freewheel hub - Google Patents
A kind of Cold Extrusion Punch of freewheel hub Download PDFInfo
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- CN204074771U CN204074771U CN201420424958.9U CN201420424958U CN204074771U CN 204074771 U CN204074771 U CN 204074771U CN 201420424958 U CN201420424958 U CN 201420424958U CN 204074771 U CN204074771 U CN 204074771U
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- freewheel hub
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Abstract
The utility model discloses a kind of Cold Extrusion Punch of freewheel hub, comprise guide section, transmission section and active section from top to bottom successively, the length of described guide section is greater than the length of transmission section, and the length of transmission section is greater than the length of active section; The outer surface of the outer surface of described active section, the outer surface of transmission section and guide section is the identical special-shaped face of cylinder, but the outline line that the outline line of the outer surface of transmission section compares the outer surface of active section inwardly zooms in 0.1mm; The cross section of described active section is provided with a rectangular flange and a curved rib be made up of the circular arc of two sections of decentraction successively every 120 ° of degree on same circumference, the middle part of the lower surface of this active section is the conical surface, and this conical surface is connected with the outer surface of active section with the second arc surface by the first arc surface successively.Cold Extrusion Punch of the present utility model, the once cold extrusion achieving freewheel hub is molded, and achieve complex-shaped surface mould without machining.
Description
Technical field
The utility model relates to a kind of cold extrusion die, particularly a kind of Cold Extrusion Punch of freewheel hub.
Background technology
Freewheel hub is a strength member of automobile and motorcycle electrifying startup, its structure comparison is special, does not run through at the bottom of interior die cavity band, and die container is extremely accurate extremely complicated special-shaped curve, this product is according to casting processing, and dimensional accuracy and surface roughness do not reach requirement.According to machining, not only complex procedures, consume many, and machining accuracy is wayward, and homogeneity of product especially is in batch difficult to ensure, production cost is also high, and efficiency is extremely low, cannot adapt to the demand in enormous quantities of automobile and motorcycle parts.In view of this phenomenon, the applicant have developed a kind of cold-extrusion technology and mould to process this freewheel hub, the production of this product is made to achieve cold extrusion one-shot forming, the inherent quality of product significantly improves, and precision is high, improve raw-material utilization rate, reduce processing capacity, reduce the percent defective of following process, substantially increase production efficiency simultaneously.Thus need to develop a kind of Cold Extrusion Punch be equipped with this cold-extrusion technology and mould.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of Cold Extrusion Punch of freewheel hub, and the once cold extrusion it achieving freewheel hub is molded, and achieves complex-shaped surface mould without machining.
The technical scheme realizing above-mentioned purpose is: a kind of Cold Extrusion Punch of freewheel hub, the extrusion of its freewheel hub extruded is an outer surface is one-level stepped cylindrical shape, the inner cavity surface of the reduced diameter section of the extrusion of this freewheel hub is the face of cylinder, the inner cavity surface of the enlarged diameter section of the extrusion of this freewheel hub is the special-shaped face of cylinder, namely the cross section of the inner cavity surface of this enlarged diameter section is provided with a rectangular channel and a curved groove be made up of the circular arc of two sections of decentraction successively every 120 ° of degree on same circumference, the middle part of the bottom surface of the inner chamber of this enlarged diameter section is the conical surface, this conical surface is connected with inner cavity surface with the second arc surface by the first arc surface successively,
Described extruding punch comprises guide section, transmission section and active section from top to bottom successively, and wherein, described guide section, transmission section and active section are as a whole, and the length of described guide section is greater than the length of transmission section, and the length of transmission section is greater than the length of active section; The outer surface of the outer surface of described active section, the outer surface of transmission section and guide section is the identical special-shaped face of cylinder, but the outline line that the outline line of the outer surface of transmission section compares the outer surface of active section inwardly zooms in 0.1mm; The cross section of described active section is provided with a rectangular flange and a curved rib be made up of the circular arc of two sections of decentraction successively every 120 ° of degree on same circumference, the middle part of the lower surface of this active section is the conical surface, and this conical surface is connected with the outer surface of active section with the second arc surface by the first arc surface successively.
The Cold Extrusion Punch of above-mentioned freewheel hub, wherein, taper theta=3 ° of the conical surface of the lower surface of described active section, the radius R 1=5mm of described first arc surface; Radius R 2≤the 1.4mm of described second arc surface.
The Cold Extrusion Punch of above-mentioned freewheel hub, wherein, described active section, guide section are all connected with arc transition with the junction of the outline line of the outer surface of transmission section.
The Cold Extrusion Punch of above-mentioned freewheel hub, wherein, the roughness of the outer surface of described active section is Ra0.4.
The technical scheme of the Cold Extrusion Punch of freewheel hub of the present utility model, achieve the molded processing of once cold extrusion of freewheel hub, and achieve the shaping without machining of the complicated inner cavity of this product, can save former material part and processing charges, and the inherent quality of freewheel hub cold-extruded part is significantly improved, and precision is high, improve raw-material utilization rate, reduce processing capacity, reduce the percent defective of following process, substantially increase production efficiency.
Accompanying drawing explanation
Fig. 1 a is the structure sectional view of freewheel hub;
Fig. 1 b is the side view of Fig. 1 a;
Fig. 2 is the structural representation of the Cold Extrusion Punch of freewheel hub of the present utility model;
Fig. 2 a is the upward view of Fig. 2;
Fig. 2 b is the enlarged drawing at the A position in Fig. 2.
Detailed description of the invention
In order to understand the technical solution of the utility model better, be described in detail by reference to the accompanying drawings below by embodiment particularly:
Refer to Fig. 1 a and Fig. 1 b, the extrusion 40 of freewheel hub is an outer surface is one-level stepped cylindrical shape, the inner cavity surface of the reduced diameter section 42 of the extrusion of this freewheel hub is the face of cylinder, the inner cavity surface of the enlarged diameter section 41 of the extrusion of this freewheel hub is the special-shaped face of cylinder, namely the cross section of the inner cavity surface of this enlarged diameter section 41 is provided with a rectangular channel 43 and a curved groove be made up of the circular arc of two sections of decentraction 44 successively every 120 ° of degree on same circumference, the middle part of the bottom surface of the inner chamber of this enlarged diameter section 41 is the conical surface, this conical surface is connected with inner cavity surface with the second arc surface R2 by the first arc surface R1 successively.
Refer to Fig. 2, Fig. 2 a and Fig. 2 b again, the extruding punch of freewheel hub of the present utility model, comprise guide section 1, transmission section 2 and active section 3 from top to bottom successively, guide section 1, transmission section 2 and active section 3 are as a whole, the length of guide section 1 is greater than the length of transmission section 2, and the length of transmission section 2 is greater than the length of active section 3.
The outer surface of the outer surface of active section 3, the outer surface of transmission section 2 and guide section 1 is the identical special-shaped face of cylinder, but the outline line that the outline line of the outer surface of transmission section 2 compares the outer surface of active section 3 inwardly zooms in 0.1mm.
The cross section of active section 3 is provided with a rectangular flange 31 and a curved rib be made up of the circular arc of two sections of decentraction 32 successively every 120 ° of degree on same circumference, the middle part of the lower surface of this active section 3 is the conical surface 33, and this conical surface 33 is connected with the outer surface of active section 3 with the second arc surface 35 by the first arc surface 34 successively.Taper theta=3 ° of the conical surface 33, the radius R 1=5mm of the first arc surface 34, the radius R 2≤1.4mm of the second arc surface 35.
The extruding punch of freewheel hub of the present utility model, the length of guide section 1 is longer, fix for the installation in a mold of whole Cold Extrusion Punch and lead, the shape of guide section 1 is completely identical with active section 3 with precision, simultaneously because guide section 1 is longer, active section 3 because of wearing and tearing or when crumbling, damage section cut, guide section 1 can be changed a social system as active section 3.
Active section 3 owing to having violent friction when extruding and between the metal be extruded, and will ensure the roughness of the die cavity inner surface after extrusion extruding, therefore the roughness of active section 3 need ensure as Ra0.4 simultaneously.
The shape fundamental sum active section 3 of transmission section 2 and the shape of guide section 1 consistent, be the complicated special-shaped face of cylinder.Because transmission section 2 is positioned at the top of active section 3, when extruding, metal flow will contact transmission section 2 after active section 3, the size of the outer surface of active section 3 guarantees the inner cavity size of extrusion, and transmission section 2 does not need to play the effect ensureing size, as long as can transmit and bear pressure during extruding, in addition when extruding and the larger frictional force of area of Metal Contact larger, be unfavorable for extruding on the contrary, therefore, in order to ensure to extrude punch intensity while can reduce again extruding time frictional force, the outline line of the outer surface of transmission section 2 is evenly zoomed in L=0.1mm than the outline line of the outer surface of active section 3.
The extruding punch of freewheel hub of the present utility model, because pressure during extruding is very big, in order to avoid the stress extruding punch is concentrated, extend the service life of extruding punch, the outer surface of active section, the outer surface of guide section are all connected with minimum arc transition with the junction of the outline line of the outer surface of transmission section.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the utility model is described, and be not used as restriction of the present utility model, as long as in spirit of the present utility model, all will drop in Claims scope of the present utility model the change of the above embodiment, modification.
Claims (4)
1. the Cold Extrusion Punch of a freewheel hub, the extrusion of its freewheel hub extruded is an outer surface is one-level stepped cylindrical shape, the inner cavity surface of the reduced diameter section of the extrusion of this freewheel hub is the face of cylinder, the inner cavity surface of the enlarged diameter section of the extrusion of this freewheel hub is the special-shaped face of cylinder, namely the cross section of the inner cavity surface of this enlarged diameter section is provided with a rectangular channel and a curved groove be made up of the circular arc of two sections of decentraction successively every 120 ° of degree on same circumference, the middle part of the bottom surface of the inner chamber of this enlarged diameter section is the conical surface, this conical surface is connected with inner cavity surface with the second arc surface by the first arc surface successively,
Described extruding punch comprises guide section, transmission section and active section from top to bottom successively, it is characterized in that, described guide section, transmission section and active section are as a whole, and the length of described guide section is greater than the length of transmission section, and the length of transmission section is greater than the length of active section; The outer surface of the outer surface of described active section, the outer surface of transmission section and guide section is the identical special-shaped face of cylinder, but the outline line that the outline line of the outer surface of transmission section compares the outer surface of active section inwardly zooms in 0.1mm;
The cross section of described active section is provided with a rectangular flange and a curved rib be made up of the circular arc of two sections of decentraction successively every 120 ° of degree on same circumference, the middle part of the lower surface of this active section is the conical surface, and this conical surface is connected with the outer surface of active section with the second arc surface by the first arc surface successively.
2. the Cold Extrusion Punch of freewheel hub according to claim 1, is characterized in that, taper theta=3 ° of the conical surface of the lower surface of described active section, the radius R 1=5mm of described first arc surface; Radius R 2≤the 1.4mm of described second arc surface.
3. the Cold Extrusion Punch of freewheel hub according to claim 1, is characterized in that, described active section, guide section are all connected with arc transition with the junction of the outline line of the outer surface of transmission section.
4., according to the Cold Extrusion Punch of the arbitrary described a kind of freewheel hub of claims 1 to 3, it is characterized in that, the roughness of the outer surface of described active section is Ra0.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420424958.9U CN204074771U (en) | 2014-07-30 | 2014-07-30 | A kind of Cold Extrusion Punch of freewheel hub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420424958.9U CN204074771U (en) | 2014-07-30 | 2014-07-30 | A kind of Cold Extrusion Punch of freewheel hub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204074771U true CN204074771U (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420424958.9U Expired - Fee Related CN204074771U (en) | 2014-07-30 | 2014-07-30 | A kind of Cold Extrusion Punch of freewheel hub |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204074771U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175890A (en) * | 2018-08-20 | 2019-01-11 | 玉环加鑫汽车配件有限公司 | Electromagnetic clutch inner wheel hub manufacturing method |
| CN114289536A (en) * | 2021-12-31 | 2022-04-08 | 玉环普天单向器有限公司 | Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof |
-
2014
- 2014-07-30 CN CN201420424958.9U patent/CN204074771U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175890A (en) * | 2018-08-20 | 2019-01-11 | 玉环加鑫汽车配件有限公司 | Electromagnetic clutch inner wheel hub manufacturing method |
| CN109175890B (en) * | 2018-08-20 | 2019-08-23 | 玉环加鑫汽车配件有限公司 | Electromagnetic clutch inner wheel hub manufacturing method |
| CN114289536A (en) * | 2021-12-31 | 2022-04-08 | 玉环普天单向器有限公司 | Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof |
| WO2023123833A1 (en) * | 2021-12-31 | 2023-07-06 | 玉环普天单向器有限公司 | Starter drive star wheel roller chamber cold extrusion male mold and manufacturing method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20170730 |