CN205218046U - Teeth of a cogwheel class powder metallurgy part surface extrusion processing mould - Google Patents
Teeth of a cogwheel class powder metallurgy part surface extrusion processing mould Download PDFInfo
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- CN205218046U CN205218046U CN201521006582.0U CN201521006582U CN205218046U CN 205218046 U CN205218046 U CN 205218046U CN 201521006582 U CN201521006582 U CN 201521006582U CN 205218046 U CN205218046 U CN 205218046U
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- tooth
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- profile
- negative impression
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Abstract
The utility model discloses the powder metallurgy technology field discloses a teeth of a cogwheel class powder metallurgy part surface extrusion processing mould, the mould is the bed die, the outlet size in the bed die chamber of mould is the target size, the entry size in bed die chamber is greater than the outlet size, the profile of tooth of bed die intracavity with the profile of tooth of teeth of a cogwheel class powder metallurgy part is matchd, entry size linearity passes through to the outlet size, each other imbalance of angle of center pin in filter bands and bed die chamber of every in the profile of tooth of bed die intracavity. The utility model discloses a mould structure is simple, has reduced the manufacturing process process, and the cost is reduced, die carrier do not need very complicatedly can obtain even surperficial compacted zone and area density.
Description
Technical field
The utility model powder metallurgical technology, particularly a kind of gear teeth class powdered metal parts surface extrusion process mould.
Background technology
Along with the development of auto industry, powder metallurgy surface densification tooth, sprocket wheel are with high strength, and the feature application on the engine of high capacity is more and more extensive.
See accompanying drawing 3, by the negative impression that part is reduced gradually by size, increase piece surface plastic deformation gradually, obtain the surface compact layer and density that require.In existing Extrusion Die Design, negative impression everywhere size is reduced to target size gradually along identical angle, when under the effect of part at patrix by this negative impression time, each moment part amount of plastic deformation homogeneous phase is everywhere all △ d.But for tooth, sprocket component, the otherness of various point locations on part tooth top, tooth root and flank, under identical plastic deformation, the compression ratio of individual point is different, therefore the extruding force that every bit is subject to does not wait, material will be flowed to stressed little region by stressed large region, causes the inhomogeneities of piece surface density.
Utility model content
In order to solve the problems of the technologies described above, the utility model provides a kind of gear teeth class powdered metal parts surface extrusion process mould, and part is by negative impression, and the every bit on part shrinks at any time all in proportion, the uniform compacted zone of final acquisition and superficial density.
The technical scheme that the utility model is taked is:
A kind of gear teeth class powdered metal parts surface extrusion process mould, it is characterized in that, described mould is former, the outlet size of the negative impression of described mould is target size, the entrance opening dimension of described negative impression is greater than outlet size, profile of tooth in described negative impression is mated with the profile of tooth of described gear teeth class powdered metal parts, and described entrance opening dimension linear transitions is to outlet size, and in the profile of tooth in described negative impression, the angle of the filtration line of often and the central shaft of negative impression is unequal mutually.
Further, described gear teeth class powdered metal parts is gear or sprocket wheel.
Further, chamfering is set in the porch of described negative impression.
The beneficial effects of the utility model are:
(1) mould structure is simple, decreases process for making, reduces cost;
(2) mould bases does not need very complicatedly can obtain uniform surface compact layer and superficial density.
Accompanying drawing explanation
Accompanying drawing 1 is mould structure schematic diagram of the present utility model;
Accompanying drawing 2 is mould cut-away illustration of the present utility model;
Accompanying drawing 3 is piece surface plastic history schematic diagrames of the prior art.
Label in accompanying drawing is respectively:
1. mould; 2. negative impression outlet;
3. negative impression entrance; 4. profile of tooth;
L
1. former profile of tooth upper thread; L
2. former profile of tooth side line;
L
3:. the former profile of tooth line of rabbet joint; C. intermediate base fiducial axis.
Detailed description of the invention
Elaborate below in conjunction with the detailed description of the invention of accompanying drawing to the utility model gear teeth class powdered metal parts surface extrusion process mould.
See accompanying drawing 1, gear teeth class powdered metal parts surface extrusion process mould is former, the negative impression outlet 2 of mould 1 is of a size of target size, the size of negative impression entrance 3 is greater than outlet size, profile of tooth 4 in negative impression is mated with the profile of tooth of gear teeth class powdered metal parts, and entrance opening dimension linear transitions is to outlet size.
See accompanying drawing 2, will according to the chamfering of tooth Shape Design gradual change at negative impression entrance, negative impression each point is reduced to target size gradually along different angles, former profile of tooth upper thread L
1, former profile of tooth side line L
2with former profile of tooth line of rabbet joint L
3different from the angle of the intermediate base fiducial axis C of negative impression, in extrusion process, the negative impression of part by reducing gradually under the effect of patrix, the extruding force that its surface is subject to increases gradually, plastic deformation constantly increases, and each point shrinks at any time in proportion on part, the uniform compacted zone of final acquisition and superficial density.
Below be only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. a gear teeth class powdered metal parts surface extrusion process mould, it is characterized in that: described mould is former, the outlet size of the negative impression of described mould is target size, the entrance opening dimension of described negative impression is greater than outlet size, profile of tooth in described negative impression is mated with the profile of tooth of described gear teeth class powdered metal parts, described entrance opening dimension linear transitions is to outlet size, and in the profile of tooth in described negative impression, the angle of the filtration line of often and the central shaft of negative impression is unequal mutually.
2. gear teeth class powdered metal parts surface extrusion process mould according to claim 1, is characterized in that: described gear teeth class powdered metal parts is gear or sprocket wheel.
3. gear teeth class powdered metal parts surface extrusion process mould according to claim 1, is characterized in that: arrange chamfering in the porch of described negative impression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006582.0U CN205218046U (en) | 2015-12-08 | 2015-12-08 | Teeth of a cogwheel class powder metallurgy part surface extrusion processing mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521006582.0U CN205218046U (en) | 2015-12-08 | 2015-12-08 | Teeth of a cogwheel class powder metallurgy part surface extrusion processing mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205218046U true CN205218046U (en) | 2016-05-11 |
Family
ID=55893142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521006582.0U Active CN205218046U (en) | 2015-12-08 | 2015-12-08 | Teeth of a cogwheel class powder metallurgy part surface extrusion processing mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205218046U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262196A (en) * | 2018-10-16 | 2019-01-25 | 内蒙古第机械集团股份有限公司 | A kind of sliding pressure intensifying method of powder metallurgy friction plate internal tooth tooth root |
| CN112589096A (en) * | 2020-12-01 | 2021-04-02 | 青志(无锡)粉末铸锻有限公司 | Improve loose mould of local density of automobile oil pump rotor |
| CN112893845A (en) * | 2021-01-19 | 2021-06-04 | 上海大学 | Powder metallurgy high-precision helical gear manufacturing method |
-
2015
- 2015-12-08 CN CN201521006582.0U patent/CN205218046U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262196A (en) * | 2018-10-16 | 2019-01-25 | 内蒙古第机械集团股份有限公司 | A kind of sliding pressure intensifying method of powder metallurgy friction plate internal tooth tooth root |
| CN109262196B (en) * | 2018-10-16 | 2021-04-23 | 内蒙古第一机械集团股份有限公司 | Sliding pressure strengthening method for internal tooth root of powder metallurgy friction plate |
| CN112589096A (en) * | 2020-12-01 | 2021-04-02 | 青志(无锡)粉末铸锻有限公司 | Improve loose mould of local density of automobile oil pump rotor |
| CN112893845A (en) * | 2021-01-19 | 2021-06-04 | 上海大学 | Powder metallurgy high-precision helical gear manufacturing method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |