CN203541205U - Cold extruding punch with uniform stress - Google Patents
Cold extruding punch with uniform stress Download PDFInfo
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- CN203541205U CN203541205U CN201320663380.8U CN201320663380U CN203541205U CN 203541205 U CN203541205 U CN 203541205U CN 201320663380 U CN201320663380 U CN 201320663380U CN 203541205 U CN203541205 U CN 203541205U
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- cutting edge
- working end
- drift
- working
- circular cone
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Abstract
The utility model discloses a cold extruding punch with uniform stress. The cold extruding punch comprises a punch seat and a punch body, wherein a working end is arranged at one end of the punch body and is a circular cone boss working end; a working cutting edge is arranged on the end face of the working end; a circular cone transitional surface is arranged from the root of the circular cone boss to the external surface part of the working cutting edge. During working, the fatigue cracks are reduced, the borne vertical pressure is small, the stress is uniform and reasonable, the eccentric load is avoided, and the stress concentration is small.
Description
Technical field
The utility model relates to a kind of cold extrusion drift, relates in particular to a kind of stressed uniform cold extrusion drift.
Background technology
Cold extrusion is widely used as main die forming technique, therefore, mould structure is very large on the impact of mould stress, and in production reality, during drift work, end face is subject to pressure at right angle to produce strain, drift is pushed by interior metal near cylindrical position, to outer wall direction strain, and drift cylindrical wall does not have corresponding equilibrant force, can cause drift generation unbalance loading, discontinuity, affect precision and the quality of cold-extruded part, and easily make cold punching head just produce metal fatigue crackle, and drift was lost efficacy, reduce service life.
Utility model content
The purpose of this utility model is just to provide in order to address the above problem one to be difficult for unbalance loading, stressed even, reduces the cold extrusion drift of fatigue crack.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises punch holder and drift body, one end of described drift body is provided with working end, described working end is conical boss working end, the end face of described working end is provided with work cutting edge, and the root of described conical boss working end to the outer surface part of described work cutting edge is provided with circular cone transition face.
Particularly, the subsequent corrosion R of described circular cone transition face is 0.6-0.8D.
Particularly, described work cutting edge is circular section shape work cutting edge.
Particularly, the diameter of described circular section shape is 1.5--6mm.
The beneficial effects of the utility model are:
The utility model work time reduces fatigue crack, bears pressure at right angle little, stressedly evenly, is rationally difficult for unbalance loading, and stress is concentrated little.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional drift;
Fig. 2 is extrusion process schematic diagram of the present utility model.
Fig. 3 is structural representation of the present utility model.
Fig. 4 is extrusion process schematic diagram of the present utility model.
In figure: 1-punch holder, 2-drift body, 3-working end, the 4-cutting edge of working, 5-circular cone transition face, 6-woollen rod, 7-unloads charge bar, 8-extruded product, 9-die.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figures 3 and 4, the utility model comprises punch holder 1 and drift body 2, one end of drift body 2 is provided with working end 3, working end 3 is conical boss working end, the end face of working end 3 is provided with work cutting edge 4, and the root of conical boss working end is provided with circular cone transition face 5 to the outer surface part of the cutting edge 4 of working, and the subsequent corrosion R of circular cone transition face 5 is 0.6-0.8D, work cutting edge 4 is circular section shape work cutting edge, and the diameter of circular section shape is 1.5--6mm.
As illustrated in fig. 1 and 2, the work cutting edge 4 of traditional extruding drift large (be generally size moulding three point one), use die 9 and unload charge bar to cooperatively interact and practical woollen rod 4 is carried out to extrusion process, guiding poor rigidity, it is bending and fracture that punch holder 1 and drift body 2 can not guarantee to push not beat; The root of working end 3 to the outer surface portion of the cutting edge 4 of working is divided into the conical surface that angle is a, when woollen rod 4 is carried out to extrusion modling, along with a increases, material is subject to the horizontal component that squeezes the working end 3 to drift while flowing to increase (F1=Ftga), and frictional force also increases, and a is 0 o'clock, the now horizontal component minimum of stress surface maximum of work cutting edge 4, but guiding rigidity becomes poorer, drift body 2 easily pendulum is curved disconnected, and the extruded product 8 therefore obtaining pushes the degree of depth just can not be excessively dark.
As shown in Figures 3 and 4, less (the diameter 1.5-6mm of work cutting edge 4 of the present utility model, maximum is no more than 10mm and meets strength demand), use die 9 and unload charge bar and cooperatively interact and practical woollen rod 4 is carried out to extrusion process, guiding good rigidly, punch holder 1 and drift body 2 can guarantee to push not beat, not flexible fractureing, when woollen rod 4 contacts with working end 3, the root of conical boss working end 5 is provided with circular cone transition face 5 to the outer surface part of the cutting edge 4 of working and is R cambered surface, when woollen rod 4 is carried out to extrusion modling, material upwards flows along arc deformation, the suffered horizontal component F1 in working end 3 is the tga of backward extrusion pressure F upwards, a is the outer corner cut of circular arc R, a is little for this angle, F1 component is just little, extruding force reduces like this, material flows the frictional force of working end 3 is also greatly reduced, make that whole extrusion process is laborsaving successfully carries out, as seen from Figure 4, the extruded product 8 obtaining pushes the degree of depth also have been deepened.
These are only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., all should be included in protection domain of the present utility model.
Claims (4)
1. a stressed uniform cold extrusion drift, comprise punch holder and drift body, one end of described drift body is provided with working end, it is characterized in that: described working end is conical boss working end, the end face of described working end is provided with work cutting edge, and the root of described conical boss working end to the outer surface part of described work cutting edge is provided with circular cone transition face.
2. according to the stressed uniform cold extrusion drift of the one described in claim 1, it is characterized in that: the subsequent corrosion R of described circular cone transition face is 0.6-0.8D.
3. according to the stressed uniform cold extrusion drift of the one described in claim 1, it is characterized in that: described work cutting edge is circular section shape work cutting edge.
4. according to the stressed uniform cold extrusion drift of the one described in claim 3, it is characterized in that: the diameter of described circular section shape is 1.5--6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663380.8U CN203541205U (en) | 2013-10-27 | 2013-10-27 | Cold extruding punch with uniform stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663380.8U CN203541205U (en) | 2013-10-27 | 2013-10-27 | Cold extruding punch with uniform stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203541205U true CN203541205U (en) | 2014-04-16 |
Family
ID=50459375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320663380.8U Expired - Fee Related CN203541205U (en) | 2013-10-27 | 2013-10-27 | Cold extruding punch with uniform stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203541205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226821A (en) * | 2014-09-25 | 2014-12-24 | 创美工艺(常熟)有限公司 | Male mold for stamping crack-resistant extrusion lug boss and stamping mold with male mold |
-
2013
- 2013-10-27 CN CN201320663380.8U patent/CN203541205U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104226821A (en) * | 2014-09-25 | 2014-12-24 | 创美工艺(常熟)有限公司 | Male mold for stamping crack-resistant extrusion lug boss and stamping mold with male mold |
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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: 20140416 Termination date: 20191027 |