ATE229389T1 - METHOD FOR PRODUCING A METAL SHEET FAN AND FAN PRODUCED THEREFORE - Google Patents

METHOD FOR PRODUCING A METAL SHEET FAN AND FAN PRODUCED THEREFORE

Info

Publication number
ATE229389T1
ATE229389T1 AT98101839T AT98101839T ATE229389T1 AT E229389 T1 ATE229389 T1 AT E229389T1 AT 98101839 T AT98101839 T AT 98101839T AT 98101839 T AT98101839 T AT 98101839T AT E229389 T1 ATE229389 T1 AT E229389T1
Authority
AT
Austria
Prior art keywords
fan
blades
disk
producing
metal sheet
Prior art date
Application number
AT98101839T
Other languages
German (de)
Inventor
Erminio Coral
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
Application granted granted Critical
Publication of ATE229389T1 publication Critical patent/ATE229389T1/en

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>
AT98101839T 1997-02-04 1998-02-03 METHOD FOR PRODUCING A METAL SHEET FAN AND FAN PRODUCED THEREFORE ATE229389T1 (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 (1)

Publication Number Publication Date
ATE229389T1 true ATE229389T1 (en) 2002-12-15

Family

ID=11415308

Family Applications (1)

Application Number Title Priority Date Filing Date
AT98101839T ATE229389T1 (en) 1997-02-04 1998-02-03 METHOD FOR PRODUCING A METAL SHEET FAN AND FAN PRODUCED THEREFORE

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
EP0857528A2 (en) 1998-08-12
PT857528E (en) 2003-04-30
EP0857528A3 (en) 1999-06-23
ES2186024T3 (en) 2003-05-01
ITTO970082A1 (en) 1998-08-04
DK0857528T3 (en) 2003-03-24
DE69809972T2 (en) 2003-07-17
EP0857528B1 (en) 2002-12-11
IT1291493B1 (en) 1999-01-11
DE69809972D1 (en) 2003-01-23

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