CN101987360A - Powder metallurgy one-time forming method for part with outline closed vertical groove - Google Patents
Powder metallurgy one-time forming method for part with outline closed vertical groove Download PDFInfo
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- CN101987360A CN101987360A CN 201010534587 CN201010534587A CN101987360A CN 101987360 A CN101987360 A CN 101987360A CN 201010534587 CN201010534587 CN 201010534587 CN 201010534587 A CN201010534587 A CN 201010534587A CN 101987360 A CN101987360 A CN 101987360A
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- die
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- powder metallurgy
- vertical groove
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Abstract
The invention provides a powder metallurgy one-time forming method for a part with an outline closed vertical groove. The method comprises the following steps of: (1) arranging a plate die corresponding to the outline closed vertical groove of the part, arranging the plate die into a lower die punch, placing the lower die punch on a powder charging seat, sleeving a female die on the plate die, ensuring that the lower die punch and the plate die are assembled in place, pouring powder metallurgy powder into the female die, flattening the powder surface by shaking, and pressing the powder to form the part; (2) performing first die release, namely releasing the upper die punch, the plate die, the lower die punch and the part from the female die integrally; and (3) performing second die release, namely releasing the plate die, and lightly knocking the lower die punch on a plane to release the upper die punch and the lower die punch so as to finish part formation. The method realizes powder metallurgy one-time formation of the part with the outline closed vertical groove by the plate die and two-time die release, improves the utilization rate of materials, and reduces the production cost of the part with the outline closed vertical groove.
Description
Technical field
The present invention relates to the manufacturing process of powdered metal parts, especially have the powder metallurgy once-forming method of external form sealing vertical slot part.
Background technology
Have the part of certain external form sealing vertical slot, as the power steer spool, structure is seen Fig. 1, and external form has six axially sealing vertical slots 1, and traditional handicraft mainly adopts round steel through machined, complex procedures, and stock utilization is low.
Summary of the invention
In order to reduce the production cost of part with external form sealing vertical slot, improve the utilization rate of material, the present invention proposes to have the powder metallurgy once-forming method of external form sealing vertical slot part, and it is characterized in that: concrete steps are as follows:
(1), with the corresponding sheet mould that is provided with of the external form of part sealing vertical slot, the sheet mould bottom punch of packing into places on the dress powder seat, and former is enclosed within on the sheet mould, bottom punch and sheet mould are guaranteed to be seated; Pour the powder metallurgy powder into, shake flat powder face, press forming;
(2), a demoulding: upper punch, sheet mould, bottom punch and part integral body are deviate from from former;
(3), the secondary demoulding: the sheet mould is deviate from, and bottom punch is gently knocked in the plane, and upper punch, bottom punch all can be deviate from, and finish part forming.
Beneficial effect: the present invention crosses the sheet mould is set, and by twice demoulding, has realized having the powder metallurgy once-forming of external form sealing vertical slot part, has not only improved the utilization rate of material, has also reduced the production cost with external form sealing vertical slot part.
Description of drawings
Fig. 1 is the structure chart of power steer spool.
Fig. 2 is embodiment of the present invention figure.
The specific embodiment
As shown in Figure 1, have six sealing vertical slots 2 on the cylindrical of power steer spool 1.
Shown in Fig. 1,2, be example with the power steer spool, it is as follows to further describe the present invention: have the powder metallurgy once-forming method of the power steer spool of external form sealing vertical slot, adopt the powder metallurgical technique manufacturing, concrete steps are as follows:
(1), corresponding 3, six sheet moulds 3 of six sheet moulds bottom punch 5 of packing into that is provided with the external form of power steer spool sealing vertical slot, place on the dress powder seat 6, former 4 is enclosed within on the sheet mould, bottom punch 5 and sheet mould 3 are guaranteed to be seated; Pour the powder metallurgy powder into, shake flat powder face, press forming;
(2), a demoulding: upper punch 7, sheet mould 3, bottom punch 5 and part integral body are deviate from from former;
(3), the secondary demoulding: sheet mould 3 is deviate from, and bottom punch 5 is gently knocked in the plane, and upper punch 7, bottom punch 5 all can be deviate from, and finish part forming.
Finish the power steer spool of shaping, whole powder metallurgy process has just been finished in---heat treatment--cold treatment of passing through sintering.
Operation to sintering, heat treatment and cold treatment specifically describes as follows:
Sintering: the part of press forming is sent into powder metallurgy sintering furnace in the pre-burning of pre-burning district with at the sintering zone sintering; Calcined temperature is 600-750 ℃, and sintering temperature is 1120-1160 ℃, and sintering time is 2-3 hour;
Heat treatment: part sent into be heated to 800-900 ℃ in the heat-treatment furnace, and insulation 2-3 hour; Then, cool off with quenching oil;
Cold treatment: the back part container of packing into that will quench adds liquid nitrogen and carries out subzero treatment; Temperature is at subzero 100 ℃-subzero 190 ℃, and the time is 12-24 hour.
Claims (1)
1. have the powder metallurgy once-forming method of external form sealing vertical slot part, it is characterized in that: concrete steps are as follows:
(1), with the corresponding sheet mould that is provided with of the external form of part sealing vertical slot, the sheet mould bottom punch of packing into places on the dress powder seat, and former is enclosed within on the sheet mould, bottom punch and sheet mould are guaranteed to be seated; Pour the powder metallurgy powder into, shake flat powder face, press forming;
(2), a demoulding: upper punch, sheet mould, bottom punch and part integral body are deviate from from former;
(3), the secondary demoulding: the sheet mould is deviate from, and bottom punch is gently knocked in the plane, and upper punch, bottom punch all can be deviate from, and finish part forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010534587 CN101987360A (en) | 2010-11-05 | 2010-11-05 | Powder metallurgy one-time forming method for part with outline closed vertical groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010534587 CN101987360A (en) | 2010-11-05 | 2010-11-05 | Powder metallurgy one-time forming method for part with outline closed vertical groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101987360A true CN101987360A (en) | 2011-03-23 |
Family
ID=43744260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010534587 Pending CN101987360A (en) | 2010-11-05 | 2010-11-05 | Powder metallurgy one-time forming method for part with outline closed vertical groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101987360A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378416A (en) * | 2016-11-30 | 2017-02-08 | 广西玉柴机器股份有限公司 | Large complex-shaped sand core mold structure and demoulding method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH091400A (en) * | 1995-06-21 | 1997-01-07 | Nissan Motor Co Ltd | Molding method for powder molding having undercut part |
| US6156265A (en) * | 1996-08-19 | 2000-12-05 | Sumitomo Electric Industries, Ltd. | Powder compacting apparatus and method of forming helical gear wheel using said powder compacting apparatus |
| CN200995489Y (en) * | 2006-12-31 | 2007-12-26 | 东风汽车有限公司 | One-step forming die for powder metallurgy part with certain inner vertical groove |
| CN201446225U (en) * | 2009-06-23 | 2010-05-05 | 诸城市同翔机械有限公司 | Stamping die for powder metallurgy die |
-
2010
- 2010-11-05 CN CN 201010534587 patent/CN101987360A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH091400A (en) * | 1995-06-21 | 1997-01-07 | Nissan Motor Co Ltd | Molding method for powder molding having undercut part |
| US6156265A (en) * | 1996-08-19 | 2000-12-05 | Sumitomo Electric Industries, Ltd. | Powder compacting apparatus and method of forming helical gear wheel using said powder compacting apparatus |
| CN200995489Y (en) * | 2006-12-31 | 2007-12-26 | 东风汽车有限公司 | One-step forming die for powder metallurgy part with certain inner vertical groove |
| CN201446225U (en) * | 2009-06-23 | 2010-05-05 | 诸城市同翔机械有限公司 | Stamping die for powder metallurgy die |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106378416A (en) * | 2016-11-30 | 2017-02-08 | 广西玉柴机器股份有限公司 | Large complex-shaped sand core mold structure and demoulding method |
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Open date: 20110323 |