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CN1027871C - Powder metallurgy process for manufacturing Cu end ring of motor - Google Patents

Powder metallurgy process for manufacturing Cu end ring of motor Download PDF

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Publication number
CN1027871C
CN1027871C CN93100889A CN93100889A CN1027871C CN 1027871 C CN1027871 C CN 1027871C CN 93100889 A CN93100889 A CN 93100889A CN 93100889 A CN93100889 A CN 93100889A CN 1027871 C CN1027871 C CN 1027871C
Authority
CN
China
Prior art keywords
manufacturing
motor
end ring
present
sintering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN93100889A
Other languages
Chinese (zh)
Other versions
CN1076150A (en
Inventor
王连成
井俊起
张世伟
靳亚文
李淑玲
段俊荣
缪强
王文升
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
No2 Inst Ministry Of Machine-Building And Electronics Industry
Original Assignee
No2 Inst Ministry Of Machine-Building And Electronics Industry
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by No2 Inst Ministry Of Machine-Building And Electronics Industry filed Critical No2 Inst Ministry Of Machine-Building And Electronics Industry
Priority to CN93100889A priority Critical patent/CN1027871C/en
Publication of CN1076150A publication Critical patent/CN1076150A/en
Application granted granted Critical
Publication of CN1027871C publication Critical patent/CN1027871C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/105—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing inorganic lubricating or binding agents, e.g. metal salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F2003/023—Lubricant mixed with the metal powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Powder Metallurgy (AREA)

Abstract

The present invention relates to a powder metallurgy method for manufacturing a copper end ring of a motor, which belongs to the methods using metal powder for manufacturing toothed products by a pressing and sintering method. In the present invention, firstly, 0.15 to 0.25% of zinc stearate is additionally added into electrolytic copper powder and uniformly mixed. Then, the mixed materials are filled into a mould for pressing, and the pressed blank density is 7.3 to 7.6 g/cm<3>. Subsequently, the pressed blank is sintered in the cracked ammonia atmosphere containing 75% of H2 and 25% of N2. The sintering temperature is 850 DEG C to 1000 DEG C, and the temperature holding time is 1 to 2.5 hours. The present invention is used for manufacturing toothed parts which are made of copper metal powder and have favorable electric conductive performance and weldability.

Description

Powder metallurgy process for manufacturing Cu end ring of motor
The invention belongs to by metal dust has the tooth goods with the compacting and the method manufacturing of sintering, and there is the tooth part at the copper metal powder end that is specially adapted to make good electrical conductivity, solderability.
Cu end ring of motor is that the key that connects rotor bar has the tooth part, requires to have good electrical conductivity and solderability.Patent of invention CN1056832A discloses a kind of production technology of making iron-based and iron-copper bi-metal products with powdered metallurgical material, this method is evenly mixed iron powder or copper powder with zinc stearate, the cold moudling in the mould of packing into after the mixing, under 810 °～880 ℃ low temperature, carry out sintering, and then through multiple press and 850 °～880 ℃ temperature under resintering.Said method is compared with traditional machine-tooled method and has been saved energy consumption, has saved a large amount of nonferrous materials.But the weak point of its existence is its technology need pass through batch mixing, cold pressing, sintering, press again, resintering altogether five processes finish, technology is complicated.
The purpose of this invention is to provide the simple powder metallurgy process for manufacturing Cu end ring of motor of a kind of technology, only need through batch mixing, cold pressing, the sintering three process can finish.
The present invention is achieved in that at first electrolytic copper powder and zinc stearate was mixed in batch mixer 40 minutes, suppresses in the mould of packing into after evenly mixing, and damaging density by pressure is 7.4g/cm 3, then carry out sintering, sintering temperature is 990 ° ± 10 ℃, sintering time is 2 hours.
Compare with background technology, the present invention has following advantage:
1.CN1056832A disclosed method is: batch mixing, cold pressing, sintering, multiple press, resintering five processes altogether, and method disclosed by the invention be batch mixing, cold pressing, the sintering three process, saved " multiple press, resintering " twice important procedure, energy efficient 50%.
2. goods conductance of the present invention is 1.89 * 10 -2μ Ω m is available as conductive material.
3. goods of the present invention have good solderability, and the material particle size aperture that the present invention selects for use is-0.071mm that finished parts density is up to 8.6g/cm 3, porosity is little, so after goods of the present invention and the welding of fine and close copper bar, the mechanics mechanical and physical performance of its joint equates with base material.
4. goods precision of the present invention is higher, compares with documents, can save machining processes.The selected technical parameter of the present invention has guaranteed that the goods sintering shrinkage is controlled at 4.5%, thereby has guaranteed the dimensional accuracy of part, and densification degree and fineness can be saved machining processes like this.
Embodiment:
Finished parts are 200,250 serial motor for submerged pump copper end ring, accessory size: outside circle: Φ 80～Φ 110mm, root circle: Φ 50～Φ 72mm, the number of teeth 20～22 teeth, transverse tooth thickness 14～19mm.
Production technology and properties of product:
Raw material: pure copper powder granularity aperture-0.071mm, other adds stearic acid zinc 0.18%
Green density: 7.4g/cm 3
Sintering temperature: 990 ° ± 10 ℃
Sintering time: 2 hours
Sintering shrinkage: 4.5%
Parts density: 8.6g/cm 3
Resistivity: 1.89 * 10 -2Ω mm 2/ m

Claims (2)

1, a kind of manufacture method of powder metallurgy Cu end ring of motor, the raw material of this method are that electrolytic copper powder evenly mixes with zinc stearate, suppress in the mould of packing into after the mixing, it is characterized in that sintering temperature is 990 ° ± 10 ℃, and sintering time is 2 hours.
2, the manufacture method of powder metallurgy Cu end ring of motor as claimed in claim 1 is characterized in that: electrolytic copper powder adds stearic acid zinc and mixed in batch mixer 40 minutes, and green density is 7.4g/cm during compacting 3, sintering temperature is 990 ° ± 10 ℃.
CN93100889A 1993-01-12 1993-01-12 Powder metallurgy process for manufacturing Cu end ring of motor Expired - Fee Related CN1027871C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN93100889A CN1027871C (en) 1993-01-12 1993-01-12 Powder metallurgy process for manufacturing Cu end ring of motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN93100889A CN1027871C (en) 1993-01-12 1993-01-12 Powder metallurgy process for manufacturing Cu end ring of motor

Publications (2)

Publication Number Publication Date
CN1076150A CN1076150A (en) 1993-09-15
CN1027871C true CN1027871C (en) 1995-03-15

Family

ID=4983292

Family Applications (1)

Application Number Title Priority Date Filing Date
CN93100889A Expired - Fee Related CN1027871C (en) 1993-01-12 1993-01-12 Powder metallurgy process for manufacturing Cu end ring of motor

Country Status (1)

Country Link
CN (1) CN1027871C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101758364B (en) * 2008-12-23 2011-08-17 东睦新材料集团股份有限公司 Method for manufacturing powder metallurgy supporting seat

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100335211C (en) * 2004-06-04 2007-09-05 上海汽车股份有限公司 Method for manufacturing chain wheel of mower
CN100448139C (en) * 2006-07-19 2008-12-31 殷建伟 Processing technology for copper end collar
CN101758363B (en) * 2008-12-23 2011-06-15 东睦新材料集团股份有限公司 Manufacture method of powder metallurgy support
CN102744571B (en) * 2012-07-05 2014-08-06 武汉雄驰机电设备有限公司 Large copper end-ring manufacturing process
CN104874800A (en) * 2015-05-27 2015-09-02 优美科科技材料（苏州）有限公司 Manufacturing method for pressing powder into welded ring
CN113098163B (en) * 2021-04-19 2023-03-24 云南铜业压铸科技有限公司 Preparation method of cast copper rotor for high-rotation-speed motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101758364B (en) * 2008-12-23 2011-08-17 东睦新材料集团股份有限公司 Method for manufacturing powder metallurgy supporting seat

Also Published As

Publication number Publication date
CN1076150A (en) 1993-09-15

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