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WO2002068153A1 - Roue de decapage - Google Patents

Roue de decapage Download PDF

Info

Publication number
WO2002068153A1
WO2002068153A1 PCT/GB2002/000854 GB0200854W WO02068153A1 WO 2002068153 A1 WO2002068153 A1 WO 2002068153A1 GB 0200854 W GB0200854 W GB 0200854W WO 02068153 A1 WO02068153 A1 WO 02068153A1
Authority
WO
WIPO (PCT)
Prior art keywords
backplate
core
frontplate
throwing
sectors
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.)
Ceased
Application number
PCT/GB2002/000854
Other languages
English (en)
Inventor
Tony Philippson
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.)
A P Philippson
Original Assignee
A P Philippson
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 A P Philippson filed Critical A P Philippson
Priority to AU2002234759A priority Critical patent/AU2002234759A1/en
Publication of WO2002068153A1 publication Critical patent/WO2002068153A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor
    • B24C5/062—Rotor blades or vanes; Locking means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/06—Impeller wheels; Rotor blades therefor

Definitions

  • This invention relates to a throwing wheel and a backplate for a throwing wheel.
  • Throwing wheels are used in connection with abrasion machines to propel particulate abrasive material onto a surface or surfaces.
  • abrasive the abrasive material may in some instances have an effect other than a primarily abrasive effect, for example, a cleaning effect.
  • Such machines may be static, in which case an article to be treated is placed in an enclosure into which material is propelled or mobile, for example, as shown and described in GB-A-1575477, GB-A-1575478 and GB-A- 1542495.
  • the throwing wheels to which the invention relates are mounted to a machine and are driven for rotation by a drive motor of the machine.
  • the wheels have blades which act to propel the particulate abrasive material.
  • Known throwing wheels include wheels with parallel spaced front and back plates, between which individually de-mountable blades are secured; see, for example, GB-A- 1328417 and US-A-3785105.
  • One-piece cast wheels having a single back plate are also known; see, for example, GB-A-2150471.
  • the throwing wheels of the prior art are typically manufactured from steel castings which are then case hardened.
  • the hardening is used because the throwing wheels are themselves abraded by the particulate abrasive material in operation.
  • the case hardening (carried out in the conventional manner; using heating and quenching techniques) causes distortion of the castings which then require precision machining in order to restore balance to the wheel.
  • a throwing wheel is cast, machined, hardened and then re-machined. This means that the wheel is a relatively expensive component of an abrasion machine.
  • a backplate for a throwing wheel comprising a plurality of backplate sectors mounted on a core, the core being adapted for releasable mounting on a drive means of an abrasion machine for rotation about an axis, and the backplate sectors extending generally radially from the axis and each terminating in an arcuate band which together form a generally continuous circumferential band which encircles the core.
  • the core may, for example, be made from a mild steel casting (which since it is not hardened does not need re-machining after the hardening process) or even a plastics material such as nylon (for example that marketed under the name "Nylotron"). In this way, not only may the machining requirements be reduced but also the mass of the wheel may be reduced thereby providing reductions both in the cost of manufacture and operating costs.
  • the invention provides a throwing wheel for an abrasion machine comprising a backplate having a plurality of backplate sectors mounted on a backplate core, the backplate core being adapted for releasable mounting on a drive means of the abrasion machine for rotation about an axis, and the backplate sectors extending generally radially from the axis and each terminating in an arcuate band which together form a generally continuous circumferential band which encircles the backplate core, the throwing wheel further comprising a frontplate spaced apart from and generally parallel with the backplate, the frontplate including a plurality of frontplate sectors mounted on a frontplate core, and the frontplate sectors extending generally radially from the axis and each terminating in an arcuate band which together form a generally continuous circumferential band which encircles the frontplate core, the throwing wheel further including a plurality of throwing blades extending generally radially and extending between the inner surfaces of the frontplate and backplate respectively.
  • the invention provides a backplate for a throwing wheel adapted for releasable mounting on drive means of an abrasion machine, the backplate having a separable outer portion forming a relatively abrasion resistant generally circumferential band around the remaining inner portion.
  • the backplate For small throwing wheels (for example having diameters less than 300mm) the backplate need not be produced in sectors.
  • the advantages of lower weight and reduced distortion from heat treatment may be obtained using a relatively hard circumferential band (made for example from hardened steel), separably mounted on a central core formed from a lightweight material such as a plastics material.
  • a wheel may be used with a frontplate and the core may be formed with various slot arrangements for holding throwing blades.
  • Figure 1 is a plan view of a throwing wheel in accordance with the invention.
  • Figure 2 is a sectional view along line II - II of Figure 1 ;
  • Figure 3 is a plan view of a backplate sector in accordance with the invention.
  • Figure 4 is a sectional view along line IV-IV of Figure 3;
  • Figure 5 is a perspective wire diagram showing a backplate sector
  • Figure 6 is a second perspective wire diagram of a backplate sector
  • Figure 7 is a perspective view of a backplate sector.
  • a throwing wheel backplate has a core 2 which is a generally planar disc and which (in this embodiment) incorporates a hub 4 which is adapted for releasable mounting on the drive shaft of an abrasion machine.
  • the hub 4 may be fixed to the core 2 using fastenings such as bolts.
  • the core 2 has a plurality of pairs of apertures 6; each pair being arranged to extend radially from the centre of the hub 4. Other numbers and -arrangements of apertures may instead be used. Also, other locating arrangements may be used which do not require apertures.
  • the apertures 6 are positioned and dimensioned to receive locating fingers 8 formed on the underside of a plurality of backplate sectors 10.
  • Each backplate sector 10 has an arcuate band 12 formed at its periphery.
  • the arcuate band 12 forms a continuous circumferential band around the core 2.
  • Each sector 10 is typically made from an abrasion resistant material such as case hardened steel.
  • the band 12 forms an abrasion resistant shield around the core 2.
  • the core 2 is made from lightweight and/or relatively soft materials such as plastics or mild steel.
  • the essential requirement of the core 2 is that it be sufficiently rigid in use, to locate the sectors 10.
  • each sector has a recess 14 formed at its edge.
  • the recesses 14 of adjacent sectors form slots 16 into which throwing blades (not shown) may be inserted.
  • the core 2 forms a base for the slot.
  • a throwing wheel may be assembled using two of the backplates of the present invention spaced apart and axially aligned, with blades positioned between the confronting surfaces of the two places.
  • both the plates may be of the construction outlined above.
  • the wheel may be reversibly mounted on a drive shaft of an abrasion machine in the manner described in our own patent publication GB-A-2285938.
  • one of the plates may omit the portion of the hub 4 marked A in Figure 2. This further reduces weight.
  • the throwing blades may be hollow castings which further saves weight.
  • the present invention provides the potential for a throwing wheel which is easy to manufacture since it uses simple castings, which does not require so many machining steps (because the castings are smaller and easier to case harden and also because many of the parts do not require to be hardened). Furthermore, the assembled wheel is lighter than the prior art wheels which provides operational savings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

Une plaque d'appui de roue de décapage comporte une pluralité de secteurs (10) montés sur un moyeu (2), lequel moyeu (2) est montée détachable sur l'arbre d'entraînement d'une machine à abrasion. Les secteurs (10) se déploient généralement radialement depuis l'axe de l'arbre d'entraînement et se terminent chacun par un bord courbe (12). Pris ensemble, les secteurs forment un cordon circonférentiel (12) généralement continu entourant le moyeu (2). L'emploi d'une pluralité de secteurs permet de limiter la cémentation aux seuls bords courbes aux fins de résistance à l'abrasion. Il est ainsi possible de réduire la masse de la roue de décapage dans son ensemble et d'atténuer les déformations provoquées par la cémentation de la roue dans son ensemble comme c'était le cas jusqu'ici.
PCT/GB2002/000854 2001-02-28 2002-02-27 Roue de decapage Ceased WO2002068153A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002234759A AU2002234759A1 (en) 2001-02-28 2002-02-27 Throwing wheel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0104941.0 2001-02-28
GB0104941A GB2372721A (en) 2001-02-28 2001-02-28 Throwing wheel

Publications (1)

Publication Number Publication Date
WO2002068153A1 true WO2002068153A1 (fr) 2002-09-06

Family

ID=9909696

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/000854 Ceased WO2002068153A1 (fr) 2001-02-28 2002-02-27 Roue de decapage

Country Status (3)

Country Link
AU (1) AU2002234759A1 (fr)
GB (1) GB2372721A (fr)
WO (1) WO2002068153A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8550881B2 (en) 2009-11-16 2013-10-08 Pangborn Corporation Vane, mounting assembly and throwing wheel apparatus having a locking member tapered in two planes

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2108006A (en) * 1935-07-25 1938-02-08 Pangborn Corp Abrading apparatus
US2119813A (en) * 1936-05-13 1938-06-07 Pangborn Corp Abrading apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2180179B (en) * 1983-12-03 1988-04-20 Massey Alexander Abrasive throwing wheel
US5423715A (en) * 1993-03-15 1995-06-13 The Wheelabrator Corporation Bolt-together blast wheel
GB9401617D0 (en) * 1994-01-28 1994-03-23 Philippson Anthony P Abrasive throwing wheel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2108006A (en) * 1935-07-25 1938-02-08 Pangborn Corp Abrading apparatus
US2119813A (en) * 1936-05-13 1938-06-07 Pangborn Corp Abrading apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8550881B2 (en) 2009-11-16 2013-10-08 Pangborn Corporation Vane, mounting assembly and throwing wheel apparatus having a locking member tapered in two planes

Also Published As

Publication number Publication date
GB2372721A (en) 2002-09-04
GB0104941D0 (en) 2001-04-18
AU2002234759A1 (en) 2002-09-12

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