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DE69809972D1 - Method of manufacturing a sheet metal fan and fan thus manufactured - Google Patents

Method of manufacturing a sheet metal fan and fan thus manufactured

Info

Publication number
DE69809972D1
DE69809972D1 DE69809972T DE69809972T DE69809972D1 DE 69809972 D1 DE69809972 D1 DE 69809972D1 DE 69809972 T DE69809972 T DE 69809972T DE 69809972 T DE69809972 T DE 69809972T DE 69809972 D1 DE69809972 D1 DE 69809972D1
Authority
DE
Germany
Prior art keywords
fan
blades
sheet metal
disk
manufactured
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 - Lifetime
Application number
DE69809972T
Other languages
German (de)
Other versions
DE69809972T2 (en
Inventor
Erminio Coral
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.)
Coral SpA
Original Assignee
Coral SpA
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 Coral SpA filed Critical Coral SpA
Publication of DE69809972D1 publication Critical patent/DE69809972D1/en
Application granted granted Critical
Publication of DE69809972T2 publication Critical patent/DE69809972T2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/78—Making other particular articles propeller blades; turbine blades

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The method includes the steps of: preparing a sheet metal disk (28) with a central hole (29) coaxial with an axis (8); subjecting the disk (28) to at least a first drawing operation to form an undulated body (36) having at least a first number of radial undulations (34) defining a first number of blades (7) of the fan (6); and subjecting the undulated body (36) to a second drawing operation to vary the transverse dimension of each of the blades (7) and so obtain the fan (6). More specifically, the first drawing step forms blades (7) tapering axially, and each having a pair of facing converging lateral walls (11), and a connecting wall (12) connecting the lateral walls (11). And the blades (7) are formed by deforming portions of the disk (28) in the same direction. <IMAGE>
DE69809972T 1997-02-04 1998-02-03 Method of manufacturing a sheet metal fan and fan thus made Expired - Lifetime DE69809972T2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT97TO000082A IT1291493B1 (en) 1997-02-04 1997-02-04 METHOD OF MANUFACTURE OF A SHEET METAL FAN AND RELATIVE FAN SO MANUFACTURED

Publications (2)

Publication Number Publication Date
DE69809972D1 true DE69809972D1 (en) 2003-01-23
DE69809972T2 DE69809972T2 (en) 2003-07-17

Family

ID=11415308

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69809972T Expired - Lifetime DE69809972T2 (en) 1997-02-04 1998-02-03 Method of manufacturing a sheet metal fan and fan thus made

Country Status (7)

Country Link
EP (1) EP0857528B1 (en)
AT (1) ATE229389T1 (en)
DE (1) DE69809972T2 (en)
DK (1) DK0857528T3 (en)
ES (1) ES2186024T3 (en)
IT (1) IT1291493B1 (en)
PT (1) PT857528E (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6712584B2 (en) 2000-04-21 2004-03-30 Revcor, Inc. Fan blade
US6814545B2 (en) 2000-04-21 2004-11-09 Revcor, Inc. Fan blade
US6942457B2 (en) 2002-11-27 2005-09-13 Revcor, Inc. Fan assembly and method
JP7041866B2 (en) * 2016-07-13 2022-03-25 株式会社荏原製作所 Impellers for vortex pumps and vortex pumps

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3095822A (en) * 1960-04-01 1963-07-02 Kiefer Otto Plastic wheels or runners
US3845903A (en) * 1973-08-15 1974-11-05 Dunham Bush Inc One piece radial vane diffuser and method of manufacturing the same
US5554004A (en) * 1995-07-27 1996-09-10 Ametek, Inc. Fan impeller assembly

Also Published As

Publication number Publication date
IT1291493B1 (en) 1999-01-11
ES2186024T3 (en) 2003-05-01
DK0857528T3 (en) 2003-03-24
EP0857528A3 (en) 1999-06-23
ITTO970082A1 (en) 1998-08-04
EP0857528B1 (en) 2002-12-11
PT857528E (en) 2003-04-30
DE69809972T2 (en) 2003-07-17
EP0857528A2 (en) 1998-08-12
ATE229389T1 (en) 2002-12-15

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition