CN202779785U - Powder metallurgy die utilizing heating rods - Google Patents
Powder metallurgy die utilizing heating rods Download PDFInfo
- Publication number
- CN202779785U CN202779785U CN 201220366179 CN201220366179U CN202779785U CN 202779785 U CN202779785 U CN 202779785U CN 201220366179 CN201220366179 CN 201220366179 CN 201220366179 U CN201220366179 U CN 201220366179U CN 202779785 U CN202779785 U CN 202779785U
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- die
- powder metallurgy
- lead angle
- demoulding
- metallurgy die
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Abstract
The utility model relates to a powder metallurgy die utilizing heating rods. The powder metallurgy die comprises a female die body (1) and a male die body, a plurality of metal heating rods (2) are arranged in the female die body (1) and are connected with a power source through metal leads (21), a middle die (11) is arranged in the middle of the female die body (1), and a die knockout lead angle (12) is arranged at an opening of the middle die (11). Since the die knockout lead angle is arranged at the opening of the middle die of the electromagnetic heating powder metallurgy die, great shearing force which is generated by elasticity release and can cause transverse cracks of the press blank when a press blank is knocked out of the die can be reduced, so that crack of green blanks is prevented.
Description
Technical field
The utility model relates to a kind of powder metallurgy die, especially relates to a kind of powder metallurgy die that uses heating rod.
Background technology
Powder metallurgy is to produce metal dust and by the processing method of the techniques such as moulding and sintering with the mixture making articles of metal dust or non-metal powder, both can produce the special material that is difficult to produce with common method of smelting, can make again the machine components of various precisions, labor and material saving.
But when pressed compact is deviate from the mould from mould, the residual stress that is retained in pressed compact inside can obtain discharging, linear scale is about 0.2%, stress can obtain discharging the moment when pressed compact is deviate from middle die orifice section, the shape of die orifice will affect the rate of release of stress and strain, particularly for the larger-size and density of product design higher (ρ〉6.8 g/cm
3) product.
As shown in Figure 1, the existing powder metallurgy die structural representation that uses heating rod, it comprises former body 1 and formpiston body, is provided with many METAL HEATING PROCESS rods 2 in former body 1, METAL HEATING PROCESS rod 2 is connected with power supply by plain conductor 21, is provided with mould 11 in the middle of the former body 1.When pressed compact was deviate from from mould, residual stress can cause pressed compact to crack, and badly influences the quality of pressed compact product.
Summary of the invention
The utility model has designed a kind of powder metallurgy die that uses heating rod, and the technical problem of its solution is the pressed compact in the existing powder metallurgy forming mold when deviating from from mould, and residual stress can cause pressed compact to crack, and badly influences the quality of pressed compact product.
In order to solve the technical problem of above-mentioned existence, the utility model has adopted following scheme:
A kind of powder metallurgy die that uses heating rod, comprise former body (1) and formpiston body, in former body (1), be provided with many METAL HEATING PROCESS rods (2), METAL HEATING PROCESS rod (2) is connected with power supply by plain conductor (21), be provided with mould in (11) in the middle of the former body (1), it is characterized in that: be provided with demoulding lead angle (12) at middle mould (11) opening part.
Further, described demoulding lead angle (12) forms an inverted trapezoidal structure at the axial cross section of described middle mould (11).
Further, 10.5 °≤demoulding lead angle (12)≤11.5 °, a limit of described demoulding lead angle (12) is parallel with axis, and another limit of described demoulding lead angle (12) is the hypotenuse of inverted trapezoidal structure.
Further, demoulding chamfering and middle mould inwall junction (13) are the arc-shaped transition structure.
The powder metallurgy die of this use heating rod is compared with the existing powder metallurgy die of heating rod that uses, and has following beneficial effect:
(1) the utility model is owing to the middle mould opening part at the powder metallurgy die that uses heating rod is provided with demoulding lead angle; this demoulding lead angle can reduce pressed compact and deviate from the significant shear power that produces because of elasticity release the process from mould; this shearing force is to cause pressed compact to produce the main cause of transversal crack, thereby has protected green compact that crackle does not occur.
(2) demoulding chamfering of the present utility model and middle mould inwall junction are the arc-shaped transition structure, and the arc-shaped transition structure can further avoid pressed compact to produce transversal crack, has improved the quality of green compact.
Description of drawings
Fig. 1: the existing powder metallurgy die radial section figure that uses heating rod;
Fig. 2: the utility model uses the powder metallurgy die radial section figure of heating rod;
Fig. 3: demoulding lead angle place enlarged diagram among Fig. 2.
Description of reference numerals:
1-former body; 11-middle mould; 12-demoulding lead angle; 13-demoulding chamfering and middle mould inwall junction; 2-METAL HEATING PROCESS rod; 21-plain conductor.
The specific embodiment
Below in conjunction with Fig. 2 and Fig. 3, the utility model is described further:
As shown in Figure 2, a kind of powder metallurgy die that uses heating rod, comprise former body 1 and formpiston body, in former body 1, be provided with many METAL HEATING PROCESS rods 2, METAL HEATING PROCESS rod 2 is connected with power supply by plain conductor 21, be provided with mould 11 in the middle of the former body 1, be provided with demoulding lead angle 12 at middle mould 11 opening parts.
As shown in Figure 2, demoulding chamfering and middle mould inwall junction 13 are the arc-shaped transition structure.Demoulding chamfering of the present utility model and middle mould inwall junction 13 are the arc-shaped transition structure, and the arc-shaped transition structure can further avoid pressed compact to produce transversal crack, has improved the quality of green compact.
The above has carried out exemplary description to the utility model by reference to the accompanying drawings; obvious realization of the present utility model is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present utility model and technical scheme to carry out; or without improving design of the present utility model and technical scheme are directly applied to other occasion, all in protection domain of the present utility model.
Claims (4)
1. powder metallurgy die that uses heating rod, comprise former body (1) and formpiston body, in former body (1), be provided with many METAL HEATING PROCESS rods (2), METAL HEATING PROCESS rod (2) is connected with power supply by plain conductor (21), be provided with mould in (11) in the middle of the former body (1), it is characterized in that: be provided with demoulding lead angle (12) at middle mould (11) opening part.
2. the powder metallurgy die of described use heating rod according to claim 1, it is characterized in that: described demoulding lead angle (12) forms an inverted trapezoidal structure at the axial cross section of described middle mould (11).
3. the powder metallurgy die of described use heating rod according to claim 2, it is characterized in that: 10.5 °≤demoulding lead angle (12)＜11.5 °, a limit of described demoulding lead angle (12) is parallel with axis, and another limit of described demoulding lead angle (12) is the hypotenuse of inverted trapezoidal structure.
4. according to claim 1, the powder metallurgy die of 2 or 3 described use heating rods, it is characterized in that: demoulding chamfering and middle mould inwall junction (13) are the arc-shaped transition structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220366179 CN202779785U (en) | 2012-07-27 | 2012-07-27 | Powder metallurgy die utilizing heating rods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220366179 CN202779785U (en) | 2012-07-27 | 2012-07-27 | Powder metallurgy die utilizing heating rods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202779785U true CN202779785U (en) | 2013-03-13 |
Family
ID=47807127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220366179 Expired - Fee Related CN202779785U (en) | 2012-07-27 | 2012-07-27 | Powder metallurgy die utilizing heating rods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202779785U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951461A (en) * | 2019-12-10 | 2021-06-11 | 中核北方核燃料元件有限公司 | Thin-wall LiAlO2Ceramic core block forming die |
| CN113043434A (en) * | 2020-12-31 | 2021-06-29 | 中核北方核燃料元件有限公司 | Central hole-opening core block forming die |
-
2012
- 2012-07-27 CN CN 201220366179 patent/CN202779785U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951461A (en) * | 2019-12-10 | 2021-06-11 | 中核北方核燃料元件有限公司 | Thin-wall LiAlO2Ceramic core block forming die |
| CN112951461B (en) * | 2019-12-10 | 2024-02-09 | 中核北方核燃料元件有限公司 | Thin-wall LiAlO 2 Ceramic core block forming die |
| CN113043434A (en) * | 2020-12-31 | 2021-06-29 | 中核北方核燃料元件有限公司 | Central hole-opening core block forming die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20130727 |