CN104959614A - Shaping method and shaping die for ferrum-based powder metallurgy rotor or gear products - Google Patents
Shaping method and shaping die for ferrum-based powder metallurgy rotor or gear products Download PDFInfo
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- CN104959614A CN104959614A CN201510370095.0A CN201510370095A CN104959614A CN 104959614 A CN104959614 A CN 104959614A CN 201510370095 A CN201510370095 A CN 201510370095A CN 104959614 A CN104959614 A CN 104959614A
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Abstract
The invention discloses a shaping method and shaping die for ferrum-based powder metallurgy rotor or gear products with powder metallurgy product density being larger than 6.7 g/cm3. The shaping method is characterized in that a rotor or gear sintering billet which needs shaping is put into the shaping die for positioning, the shaping die comprises a female die sleeve, a female die and a core rod, and the density of the rotor or gear sintering billet is larger than 6.7 g/cm3; when an upper punch of the shaping die presses downwards, the rotor or gear sintering billet is driven to move downward to enter into the female die, when the rotor or gear sintering billet makes contact with a lower punch, the upper punch stops moving, and then demolding is conducted; in the process, the female die and the core rod are used for conducting shaping on the rotor or gear sintering billet; the female die sleeve is provided with a cooling mechanism for cooling the female die sleeve. According to the shaping method and shaping die for the ferrum-based powder metallurgy rotor or the gear products, through the method that circulating cooling water pipes are installed in the female die sleeve, the die and a die frame can be kept at a certain temperature, the product precision is guaranteed, the service life of the die is prolonged, the shaping quality of the product is also guaranteed, and the shaping method and shaping die for the ferrum-based powder metallurgy rotor or the gear products are particularly suitable for the shaping of the ferrum-based powder metallurgy rotor or the gear products.
Description
Technical field
The present invention relates to a kind of shaping methods and shaping mould of sintered metal product, specifically the shaping methods of ferrous based powder metallurgical rotor or gear goods and a shaping mould, particularly relate to a kind of sintered metal product density > 6.7g/ ㎝
3ferrous based powder metallurgical rotor or the shaping methods of gear goods and shaping mould.
Background technology
In the procedure of processing of sintered metal product, all shaping step must be had, due to the relative motion of sintered metal product, mould and sintered metal product produce frictional heat, the temperature of mould and sintered metal product is made to increase rapidly, particularly to high density, high rigidity, high-precision ferrous based powder metallurgical rotor or gear goods, because its inside and outside surface area is large, temperature rise is higher, more than 80 DEG C can be reached, like this, the size of mould will change, and size is unstable, pull, plucking, play the bad phenomenon such as slag to cause goods to occur.Temperature is higher, and the change of size is larger, and can not continuous operation.To this, after mold temperature raises, general adopt the way of forcing cooling, as by the way such as alcohol, blowing or take to quit work, method naturally cooled, greatly reduces the efficiency of production.
Summary of the invention
The object of this invention is to provide a kind of sintered metal product density > 6.7g/ ㎝
3ferrous based powder metallurgical rotor or the shaping methods of gear goods and shaping mould.
The present invention adopts following technical scheme to realize its goal of the invention, the shaping methods of a kind of ferrous based powder metallurgical rotor or gear goods, the sintered blank of the rotor or gear that need shaping is put on the shaping mould comprising former cover, former, plug and locate, the density > 6.7g/ ㎝ of the sintered blank of described rotor or gear
3; When the upper punch of shaping mould presses down, the sintered blank of rotor driven or gear moves down and enters former, and after the sintered blank contact low punch of rotor or gear, upper punch stops mobile, the then demoulding; In the process, former and the sintered blank of plug to rotor or gear is utilized to carry out shaping; Described former puts the cooling body being provided with and cooling former cover.
Cooling body of the present invention comprises around installing the cooling water pipe be embedded in former cover.
The cooling water flow of cooling water pipe of the present invention is 5 ㎏/min ~ 10 ㎏/min.
A shaping mould for ferrous based powder metallurgical rotor or gear goods, it comprises the former cover be arranged on mould bases, is provided with cooling water pipe in former cover.
Cooling water pipe of the present invention is embedded in former cover around installation.
The cooling water flow of cooling water pipe of the present invention is 5 ㎏/min ~ 10 ㎏/min.
Owing to adopting technique scheme, the present invention achieves goal of the invention preferably, by installing the method for circulating cooling water pipe in former cover, make mould, mould bases keeps certain temperature, ensure that goods precision, extend the life-span of mould, also ensure that the shaping quality of goods, the special shaping adapting to ferrous based powder metallurgical rotor or gear goods.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic diagram that shaping mould former of the present invention varies with temperature size distortion amount (L).
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the shaping methods of a kind of ferrous based powder metallurgical rotor or gear goods, by needing the sintered blank 2 of the rotor of shaping or gear to put into comprise, the shaping mould of former cover 4, former 3, plug 6 is located, the density > 6.7g/ ㎝ of the sintered blank 2 of described rotor or gear
3; When the upper punch 1 of shaping mould presses down, the sintered blank 2 of rotor driven or gear moves down and enters former 3, and after the sintered blank 2 of rotor or gear contacts low punch 7, upper punch 1 stops mobile, the then demoulding; In the process, the sintered blank 2 of former 3 and plug 6 pairs of rotors or gear is utilized to carry out shaping; Described former cover 4 is provided with the cooling body cooled former cover 4.
Cooling body of the present invention comprises around installing the cooling water pipe 5 be embedded in former cover 4.
The cooling water flow of cooling water pipe 5 of the present invention is 5 ㎏/min ~ 10 ㎏/min.
The present embodiment is 8 ㎏/min.
A shaping mould for ferrous based powder metallurgical rotor or gear goods, it comprises the former cover 4 be arranged on mould bases, is provided with cooling water pipe 5 in former cover 4.
Cooling water pipe 5 of the present invention is embedded in former cover 4 around installation.
The cooling water flow of cooling water pipe 5 of the present invention is 5 ㎏/min ~ 10 ㎏/min.
The present embodiment is 8 ㎏/min.
The present embodiment comprise former cover 4, former 3, plug 6 shaping mould by fixing of the forming frame on press, cooling water pipe 5 is connected with water inlet pipe by water intaking valve.During work, need the sintered blank 2 of the rotor of shaping or gear to put on shaping mould to locate, then upper punch 1 moves down, the sintered blank 2 of rotor driven or gear enters former 3, the sintered blank 2 of rotor or gear drives former 3, former to overlap 4 with the frictional force of former 2 and moves down, low punch 7 is made to enter former 3, after the sintered blank 2 of rotor or gear contacts with low punch 7, upper punch 1 and low punch 7 are suppressed the sintered blank 2 of rotor or gear simultaneously, make the sintered blank 2 of rotor or gear carry out plastic deformation, reach serviceability requirement.Due to frictional heat, make that the sintered blank 2 of rotor or gear, former overlap 4, former 3 generates heat, at this moment, open water intaking valve, taken away by the heat of the cooling water circulated in cooling water pipe 5 by former cover 4, former 3, make the sintered blank 2 of shaping mould and rotor or gear remain on 30 DEG C ~ 50 DEG C.As shown in Figure 2, a curve is that former cover 4 is not when having a cooling body, the temperature variant size distortion amount of shaping mould former 3, b curve is when former cover 4 is provided with cooling body, the temperature variant size distortion amount of shaping mould former 3, obviously, the cooling body of setting greatly reduces the size distortion amount of former 3.Like this, ensure that goods precision, extend the life-span of mould, meanwhile, also ensure that the shaping quality of goods, the special shaping adapting to ferrous based powder metallurgical rotor or gear goods.
Claims (6)
1. the shaping methods of a ferrous based powder metallurgical rotor or gear goods, it is characterized in that the sintered blank of the rotor or gear that need shaping to put into comprise former cover, former, plug shaping mould on locate, the density > 6.7g/ ㎝ of the sintered blank of described rotor or gear
3; When the upper punch of shaping mould presses down, the sintered blank of rotor driven or gear moves down and enters former, and after the sintered blank contact low punch of rotor or gear, upper punch stops mobile, the then demoulding; In the process, former and the sintered blank of plug to rotor or gear is utilized to carry out shaping; Described former puts the cooling body being provided with and cooling former cover.
2. the shaping methods of ferrous based powder metallurgical rotor according to claim 1 or gear goods, is characterized in that described cooling body comprises around installing the cooling water pipe be embedded in former cover.
3. the shaping methods of ferrous based powder metallurgical rotor according to claim 2 or gear goods, is characterized in that the cooling water flow of cooling water pipe is 5 ㎏/min ~ 10 ㎏/min.
4. a shaping mould for ferrous based powder metallurgical rotor or gear goods, it comprises the former cover be arranged on mould bases, it is characterized in that being provided with cooling water pipe in former cover.
5. the shaping mould of ferrous based powder metallurgical rotor according to claim 4 or gear goods, is characterized in that described cooling water pipe is embedded in former cover around installation.
6. the ferrous based powder metallurgical rotor according to claim 4 or 5 or the shaping mould of gear goods, is characterized in that the cooling water flow of cooling water pipe is 5 ㎏/min ~ 10 ㎏/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370095.0A CN104959614A (en) | 2015-06-30 | 2015-06-30 | Shaping method and shaping die for ferrum-based powder metallurgy rotor or gear products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510370095.0A CN104959614A (en) | 2015-06-30 | 2015-06-30 | Shaping method and shaping die for ferrum-based powder metallurgy rotor or gear products |
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| Publication Number | Publication Date |
|---|---|
| CN104959614A true CN104959614A (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510370095.0A Pending CN104959614A (en) | 2015-06-30 | 2015-06-30 | Shaping method and shaping die for ferrum-based powder metallurgy rotor or gear products |
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| CN (1) | CN104959614A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108480644A (en) * | 2018-04-12 | 2018-09-04 | 金华市宇辰粉末冶金有限公司 | A kind of full-automatic production equipment special and production method of powder metallurgical helical gear |
| CN110828153A (en) * | 2019-08-19 | 2020-02-21 | 横店集团东磁股份有限公司 | Automatic shaping device and method for bonded magnet product |
| CN114273661A (en) * | 2021-11-19 | 2022-04-05 | 蓝山县金山川粉末冶金有限公司 | Preparation method and application of irregular gear with annular groove |
-
2015
- 2015-06-30 CN CN201510370095.0A patent/CN104959614A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108480644A (en) * | 2018-04-12 | 2018-09-04 | 金华市宇辰粉末冶金有限公司 | A kind of full-automatic production equipment special and production method of powder metallurgical helical gear |
| CN110828153A (en) * | 2019-08-19 | 2020-02-21 | 横店集团东磁股份有限公司 | Automatic shaping device and method for bonded magnet product |
| CN110828153B (en) * | 2019-08-19 | 2020-12-22 | 横店集团东磁股份有限公司 | Automatic shaping device and method for bonded magnet product |
| CN114273661A (en) * | 2021-11-19 | 2022-04-05 | 蓝山县金山川粉末冶金有限公司 | Preparation method and application of irregular gear with annular groove |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151007 |