WO2003013768A1 - Procede et appareil pour la fabrication de composants en poudre metallique de materiaux multiples - Google Patents

Procede et appareil pour la fabrication de composants en poudre metallique de materiaux multiples Download PDF

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Publication number
WO2003013768A1
WO2003013768A1 PCT/US2002/024497 US0224497W WO03013768A1 WO 2003013768 A1 WO2003013768 A1 WO 2003013768A1 US 0224497 W US0224497 W US 0224497W WO 03013768 A1 WO03013768 A1 WO 03013768A1
Authority
WO
WIPO (PCT)
Prior art keywords
punch
cavity
powder metal
die
powder
Prior art date
Application number
PCT/US2002/024497
Other languages
English (en)
Inventor
Terry M. Cadle
Joel H. Mandel
Original Assignee
Gkn Sinter Metals, Inc.
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 Gkn Sinter Metals, Inc. filed Critical Gkn Sinter Metals, Inc.
Priority to MXPA04001040A priority Critical patent/MXPA04001040A/es
Priority to EP02768399A priority patent/EP1412114A1/fr
Priority to CA002454652A priority patent/CA2454652A1/fr
Publication of WO2003013768A1 publication Critical patent/WO2003013768A1/fr

Links

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
    • 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
    • B22F3/03—Press-moulding apparatus therefor
    • 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
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • 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
    • B22F3/03—Press-moulding apparatus therefor
    • B22F2003/033—Press-moulding apparatus therefor with multiple punches working in the same direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/361—Moulds for making articles of definite length, i.e. discrete articles with pressing members independently movable of the parts for opening or closing the mould, e.g. movable pistons
    • B29C2043/3615—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices
    • B29C2043/3618—Forming elements, e.g. mandrels or rams or stampers or pistons or plungers or punching devices plurality of counteracting elements

Definitions

  • Fig. 1(a) (Prior Art), one of many electric motor designs incorporates an assembly 10 of plates/laminations 20 made of a soft magnetic material (usually mild steel) that alternate with other plates/laminations 30 made of a conducting material (usually copper) .
  • the common arrangement of the plates 20,30 in the assembly 10 is in the form of a thick walled hollow cylinder.
  • the plates 20,30 are held together by some means, for example by use of an adhesive. Assembly of the plates 20,30 is a complex, tedious and costly procedure.
  • the iron stampings must be electrically insulated from the copper, which requires a special coating on the iron.
  • the plates 20,30 are of uniform thickness such as shown in Fig. 1(b) (Prior Art)
  • air gaps 40 can be filled with a polymer.
  • the air gaps 40 significantly detract from the magnetic flux carrying capacity of the assembly 10 since the polymer does not carry the magnetic flux. This effect can reduce the flux carrying potential of the assembly 10 by up to 40% compared to a no-gap design.
  • the plates 20,30 are wedge-shaped segments 60 as shown in Fig. 1(c) (Prior Art) .
  • the air gaps are eliminated and so the magnetic flux carrying capacity is markedly improved.
  • the difficulties and costs of manufacturing the wedge-shaped segments 60 are high, particularly due to the special shape of the segments. Additionally, there are significant problems associated with the handling and orientation of the segments during storage and assembly.
  • the present inventors realized that conventional powder-metal technologies could potentially present a solution to the difficulties and costs associated with manufacturing electric motor stators employing such specially-shaped wedge-shaped segments.
  • One experimental approach that was tried by the present inventors involved compacting copper powder into wedge-shaped segments, and then compacting polymer-coated iron powder into wedge- shaped segments, to produce individual mating segment shapes that could be assembled into the electric motor stator .
  • FIGs. 2 (A) -2 (G) show this process being applied in simplified form to manufacture a simple two-material component 125 having an outer annular section concentric about an inner cylindrical section (rather than to an electric motor stator with multiple wedge-shaped segments) .
  • Figs. 2 (A) -2 (G) show this process being applied in simplified form to manufacture a simple two-material component 125 having an outer annular section concentric about an inner cylindrical section (rather than to an electric motor stator with multiple wedge-shaped segments) .
  • this process (when employed to manufacture the simple component) employs a powder compaction tool 65 that includes a die 70, first and second lower punches 75 and 80, a separator punch 90, and a top punch 95.
  • the punches 75, 80, 90 and 95 and the die 70 are moved by mechanical or hydraulic power when installed in a powder metal compacting press (not shown) .
  • the process commences at a first step shown in Fig.
  • a third step shown in Fig. 2(D) the separator punch 90 in between the two types of powder metals 100,105 is lowered with respect to the die 70 so that the two types of powder metals come into contact with one another. As shown, some settling occurs as the separator punch 90 is withdrawn.
  • the top punch 95 is lowered onto the powder metals 100,105 and applies pressure to compact the powder metals and form the solid two-material component 125.
  • the die 70 is lowered relative to the punches 75,80 and 90 (or the punches are raised relative to the die) to expel the component 125 out of the die so that the component can be removed (as shown in Fig. 2(G)).
  • the die 70 forms the outer diameter of the final part.
  • the two punches 75 and 80 move to form the cavities into which the first and second powder materials are filled, respectively, and assist in compressing these materials as shown in Fig. 2(E).
  • the separator punch 90 keeps the two powder materials apart during the two powder-filling operations in Figs. 2(B) and 2(C) . Due to the compaction occurring in Fig. 2(E), an outer, annular section 135 formed by the first powder metal 105 is integrally joined to an inner, cylindrical section 145 formed by the second powder metal 115 along the interface between the sections .
  • a powder metal material is compacted with a light compaction pressure to have sufficient compacted strength to stand alone within the compaction tooling when the punches used to hold the material together are removed. Further, the material when so compacted is capable of receiving, within cavities in the material, a second material without significant disintegration of the compacted material upon receiving the second material (or mixing of the two materials) .
  • a multi-material segmented component is formed from two metal powders, for example, copper and polymer-coated iron for the alternating segments of an electric motor stator, respectively (or an electric motor rotor) .
  • a component to be formed from two (or more) different powder metal materials is made by first precompacting one of the materials into a shape that defines a cavity into which one of the other powder metals is filled. The first powder material is precompacted to a low density, which is less than its final density, but enough compaction pressure is applied to give it sufficient structural integrity to hold its shape when cavity forming punches are withdrawn and the other powder is filled into the resulting cavity or cavities.
  • Precompaction is followed by the withdrawal of one or more punches to form one or more cavities within the precompacted material, which in turn is followed by filling of the cavities with one or more other powder materials. Following that, all of the materials are simultaneously compacted to the final density of the compact .
  • the present invention is applied to form an electric motor stator (or rotor) in which a cavity-forming punch is in the shape of one of the two sets of wedge-shaped segments.
  • a cavity-forming punch is withdrawn, which results in cavities that are ready to be filled with the other powder.
  • both powders are simultaneously compressed to their final compaction densities and the finished compact is ejected from the die.
  • the invention provides a technique for making powder metal products of two or more different powder metal materials in which separator punches are not needed and/or in which the individual segments can be relatively small or thin.
  • the present invention relates to a method of forming an object from first and second powder metal materials.
  • the method includes providing first and second surfaces to form a first cavity having a first opening, and filling the first cavity with the first powder metal material through the first opening.
  • the method further includes compacting the first powder metal material sufficiently so as to maintain the shape of the first cavity by way of a third surface that covers the first opening, and moving the second surface to create a second cavity bounded at least in part by the compacted first powder metal material.
  • the method additionally includes filling the second cavity with the second powder metal material through a second opening, and compacting both the second powder metal material and the compacted first powder metal material by way of a third surface that covers both the first opening and the second opening.
  • the present invention additionally relates to an apparatus for forming a component from first and second powder materials.
  • the apparatus includes a die forming a first surface that defines at least in part a first cavity, and a first punch capable of being moved with respect to the die, where the first punch forms a second surface that defines at least in part the first cavity when the first punch is in a first position with respect to the die.
  • the apparatus additionally includes a second punch forming a third surface, where the second punch is lowered to compact a first material placed within the first cavity when the first punch defines the first cavity.
  • the present invention further relates to an apparatus for forming a component from first and second powder metal materials.
  • the apparatus includes a die for providing an outer surface that in part defines a first cavity, and a first punch for providing a retractable inner surface that in part defines the first cavity, where a second cavity is formed when the inner surface is retracted.
  • the apparatus also includes a second punch moveable relative to the first and second cavities and to apply pressure successively to first and second powder metal materials within the first and second cavities, respectively.
  • FIG. 1(A) is a perspective view of a Prior Art stator for an electric motor
  • Fig. 1(B) is a detail view of uniform thickness plates that are used in certain Prior Art embodiments of electric motor stators such as that shown in Fig 1 (a) ;
  • Fig. 1(C) is a detail view of plates that are wedge-shaped segments that are used in other Prior Art embodiments of electric motor stators;
  • FIG. 2 (A) -2(G) are schematics showing a sequence of steps of an experimental technique for performing multi-material compaction using a separator punch;
  • Figs. 3 (A) -3(G) are schematics showing a sequence of steps of a multi-material compaction technique in accordance with an embodiment of the present invention;
  • Fig. 4 is a perspective, exploded view of several components of a tool used to perform the technique of Figs. 3 (A) -3(G) to produce an electric motor stator, including segments of a cavity-forming punch disassembled from a portion of a die, in accordance with an embodiment of the present invention; and
  • Fig. 5 is a sectional view of the tool of Fig. 4 with a cavity-forming punch retracted.
  • Figs. 3 (A) -3 (G) a new process for manufacturing components from multiple powder-metal materials is shown.
  • the new process is applicable, as discussed with reference to Figs. 4 and 5, to the manufacture of complicated components such as electric motor stators.
  • the process is first shown in Figs. 3 (A) -3(G) being performed in simplified form to manufacture a simple two-material component 225 similar to the component 125 discussed with reference to Figs. 2 (A) -2(G), in order to highlight the differences between the present inventive process and the process of Figs. 2 (A)-2 (G) .
  • the new process (when employed to manufacture the simple component 225) employs a power compaction tool 165 that includes a die 170, first and second lower punches 175 and 180, and a top punch 195.
  • the die 170 and the punches 175, 180 and 195 are moved by mechanical or hydraulic power when installed in a powder metal compacting press (not shown) .
  • the process commences at a first step shown in Fig.
  • the top punch 195 is lowered and lightly compacts the powder metal 205.
  • the die 170 is also lowered to stay level with the second punch 180, which moves downward under the pressure of the top punch 195.
  • the first punch 175 remains constant in its position as the top punch 195 moves downward so that the powder metal 205 is compacted. From other reference points, the first punch 175 moves upward toward the top punch 195, or the two punches 175, 195 move toward one another.
  • the top punch 195 is raised and the second punch 180 is lowered to expose a cavity 190 formed within the compacted powered material 205.
  • a second of the powder materials 215 is filled into the cavity 190.
  • the top punch 195 is lowered under power, while the die 170 and first and second punches 175, 180 are held stationary so that both the first and second powder materials 205, 215 are compacted (from a different vantage point, the first and second punches 175, 180 are raised relative to the top punch 195, or all of the punches are moved together) .
  • a sixth step shown in Fig. 3(G) the top punch 195 is raised, and the die 170 is lowered relative to the first and second punches 175, 180 (or the punches are raised relative to the die) , causing the finished component 225 to be ejected from the die so that it can be slid off of the tool 165 and so that the process can begin again.
  • the new process of Figs. 3 (A) -3(G) has at least two advantages in comparison with the process of Figs. 2 (A) -2(G). First the new process successfully creates the component 225 out of the two powder materials 205, 215 without significant mixing of the two materials.
  • the precompaction of the first material 205 prevents significant mixing of the first and second materials 205,215 when the second material is added in Fig. 3(E).
  • the process of Figs. 3 (A) -3 (G) is much more suitable for crafting components such as electric motor stators in which it is important for the different sections of the components made from different materials to be separate from one another.
  • the process of Figs. 3 (A) -3 (G) does not require separator punches such as the punch 90 of Figs. 2 (A) -2(G).
  • the tool 165 is simpler, smaller and more cost-effective than the tool 65.
  • tool components are shown (in simplified form) that can be used to apply the new process of Figs. 3 (A) -3(G) to form an electric motor stator having the alternating wedge-shaped segments 60 of copper and iron.
  • the tool components will include an inner punch 301 (see Fig. 5) similar to the punches 80 and 180 of Figs. 2 and 3, respectively, which defines the inner diameter of the stator.
  • the tool components will include a die 270 that both has a wall 275 to define the outer diameter of the stator (a portion of which is shown in phantom in Fig. 5) , and also includes a slotted bottom 280.
  • the tool components will also include a punch 290 that is similar to the punch 175 of Figs. 3 (A) -3(G), but which has projections 295 that are in the shape of one of the two sets of wedge-shaped segments 60, for example, the copper segments.
  • a punch 290 that is similar to the punch 175 of Figs. 3 (A) -3(G), but which has projections 295 that are in the shape of one of the two sets of wedge-shaped segments 60, for example, the copper segments.
  • Three such punch projections 295 of this punch 290, referred to herein as the cavity-forming punch, are shown in Fig. 4, and six such projections are shown in Fig. 5, it being understood that these spaced segments would continue for 360 degrees in an actual tool for forming stators.
  • the punch projections 295 can be separate from one another (as individual punches) rather than be part of the single punch 290, or several of the projections 295 can be mounted on one punch, with others of the projections being mounted on other punches.
  • the cavity-forming punch 290 is employed in conjunction with the die 270 to form the stator with the wedge-shaped segments 60 as follows. As shown in Figs. 4-5, the cavity-forming punch projections 295 are wedge-shaped to match the shape of the wedge- shaped segments 60. In operation, the projections 295 are disposed about an axis 300 (see Fig. 4) of the die 270 and around the inner punch 301 (Fig.
  • the punch segments 295 are first inserted through close fitting slots 310 in the bottom 280 of the die 270.
  • the slots 310 would be in the same spaced array as the punch projections 295, centered on the axis 300.
  • One of the powder materials e.g., coated iron
  • the powder within these radial cavities is then lightly compacted to just enough pressure to enable the powder material to be free standing.
  • This compaction is performed by a top punch 303 (see Fig. 5) similar to the top punches 95,195 of Figs. 2 and 3. As the top punch 303 compresses the material in between the projections 295, the projections may move downward somewhat.
  • the projections 295 can be withdrawn from the die 270 through the slots 310 in the bottom 280 of the die 270. Upon withdrawal of the projections 295 so that upper ends 315 of the projections are flush with the upper surface of the bottom 280 of the die 270 (as shown in Fig. 5), the remaining second powder material (e.g., copper powder) can be poured into the resulting cavities in between the precompacted wedge-shaped segments formed by the first powder material. Then the top punch 303 is again lowered to simultaneously compress both powder materials to their final compaction density, with the bottom 280 of the die 270 and the upper ends 315 of the projections 295 supporting the bottom of the compact.
  • the remaining second powder material e.g., copper powder
  • the finished stator can be ejected out of the tooling components (e.g., by lifting the stator by again raising the projections 295 through the slots 310 or by lowering the die 270) .
  • the iron powder in particular is a special formulation that is known in the powder metal industry as "coated iron powder.”
  • the polymer coating on every iron particle provides the essential magnetic insulation between the iron and the copper segments when they are assembled.
  • This coating also insulates each iron particle from its neighbors, restricting stray electrical currents known as "eddy currents" that can cause power loss and over-heating.
  • eddy currents stray electrical currents

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Powder Metallurgy (AREA)

Abstract

La présente invention concerne un procédé et un appareil permettant la formation d'un objet à partir de premier (105) et deuxième (115) matériaux de poudre métallique. Le procédé comporte la réalisation de première et deuxième surfaces en vue de former une première cavité présentant un premier orifice, le remplissage de la première cavité avec le premier matériau de poudre métallique (105) à travers le premier orifice, et le compactage du premier matériau de poudre métallique (105) constituant une troisième surface recouvrant le premier orifice. Le procédé comporte en outre le déplacement de la deuxième surface pour créer une deuxième cavité délimitée au moins partiellement par le premier matériau de poudre métallique compacté (105), le remplissage de la deuxième cavité avec le deuxième matériau de poudre métallique (115) à travers un deuxième orifice, et le compactage à la fois du deuxième matériau de poudre métallique (115) et du premier matériau de poudre métallique compacté (105) constituant la troisième surface recouvrant les premier orifice ainsi que le deuxième orifice.
PCT/US2002/024497 2001-08-03 2002-08-02 Procede et appareil pour la fabrication de composants en poudre metallique de materiaux multiples WO2003013768A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
MXPA04001040A MXPA04001040A (es) 2001-08-03 2002-08-02 Metodo y aparato para manufacturar componentes de metal pulverizado multimaterial.
EP02768399A EP1412114A1 (fr) 2001-08-03 2002-08-02 Procede et appareil pour la fabrication de composants en poudre metallique de materiaux multiples
CA002454652A CA2454652A1 (fr) 2001-08-03 2002-08-02 Procede et appareil pour la fabrication de composants en poudre metallique de materiaux multiples

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30989301P 2001-08-03 2001-08-03
US60/309,893 2001-08-03

Publications (1)

Publication Number Publication Date
WO2003013768A1 true WO2003013768A1 (fr) 2003-02-20

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ID=23200116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/024497 WO2003013768A1 (fr) 2001-08-03 2002-08-02 Procede et appareil pour la fabrication de composants en poudre metallique de materiaux multiples

Country Status (4)

Country Link
EP (1) EP1412114A1 (fr)
CA (1) CA2454652A1 (fr)
MX (1) MXPA04001040A (fr)
WO (1) WO2003013768A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009116936A1 (fr) * 2008-03-19 2009-09-24 Höganäs Ab (Publ) Stator compacté en une pièce
EP2221131A1 (fr) * 2009-05-29 2010-08-25 Sandvik Intellectual Property AB Procédés de production de poudre compacte et corps composite fritté
WO2017182368A1 (fr) * 2016-04-20 2017-10-26 Federal-Mogul Bremsbelag Gmbh Compression d'au moins un mélange à mouler par plusieurs pilons
CN107671283A (zh) * 2017-11-21 2018-02-09 安徽同华新能源动力股份有限公司 电机壳体的粉末冶金成型设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9979248B2 (en) 2015-06-29 2018-05-22 General Electric Company Short circuit fault tolerant permanent magnet machine
ES2632888B2 (es) * 2016-03-14 2018-01-19 Universidad De Sevilla Dispositivo de compactación de polvos para obtener piezas sinterizadas con porosidad gradiante radial, procedimiento de obtención y uso

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5543235A (en) * 1994-04-26 1996-08-06 Sintermet Multiple grade cemented carbide articles and a method of making the same
US5993733A (en) * 1996-01-24 1999-11-30 Dynax Corporation Method of manufacturing sintered synchronizing ring
US6203752B1 (en) * 1998-12-03 2001-03-20 General Electric Company Rhenium-coated tungsten-based alloy and composite articles and method therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5543235A (en) * 1994-04-26 1996-08-06 Sintermet Multiple grade cemented carbide articles and a method of making the same
US5993733A (en) * 1996-01-24 1999-11-30 Dynax Corporation Method of manufacturing sintered synchronizing ring
US6203752B1 (en) * 1998-12-03 2001-03-20 General Electric Company Rhenium-coated tungsten-based alloy and composite articles and method therefor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009116936A1 (fr) * 2008-03-19 2009-09-24 Höganäs Ab (Publ) Stator compacté en une pièce
CN101977761A (zh) * 2008-03-19 2011-02-16 霍加纳斯股份有限公司 压制成一体的定子
TWI391194B (zh) * 2008-03-19 2013-04-01 Hoganas Ab Publ 壓實成單件式之靜子
US8647091B2 (en) 2008-03-19 2014-02-11 Hoganas Ab (Publ) Stator compacted in one piece
CN101977761B (zh) * 2008-03-19 2014-12-10 霍加纳斯股份有限公司 压制成一体的定子
EP2221131A1 (fr) * 2009-05-29 2010-08-25 Sandvik Intellectual Property AB Procédés de production de poudre compacte et corps composite fritté
WO2017182368A1 (fr) * 2016-04-20 2017-10-26 Federal-Mogul Bremsbelag Gmbh Compression d'au moins un mélange à mouler par plusieurs pilons
CN107671283A (zh) * 2017-11-21 2018-02-09 安徽同华新能源动力股份有限公司 电机壳体的粉末冶金成型设备
CN107671283B (zh) * 2017-11-21 2024-05-17 安徽同华新能源动力股份有限公司 电机壳体的粉末冶金成型设备

Also Published As

Publication number Publication date
EP1412114A1 (fr) 2004-04-28
CA2454652A1 (fr) 2003-02-20
MXPA04001040A (es) 2004-05-27

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