US3611640A - Abrading machines - Google Patents

Abrading machines Download PDF

Info

Publication number
US3611640A
US3611640A US851354A US3611640DA US3611640A US 3611640 A US3611640 A US 3611640A US 851354 A US851354 A US 851354A US 3611640D A US3611640D A US 3611640DA US 3611640 A US3611640 A US 3611640A
Authority
US
United States
Prior art keywords
chamber
wire
abrasive
air
flap
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
US851354A
Other languages
English (en)
Inventor
Stewart Ives Ashworth
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.)
Abrasive Developments Ltd
Original Assignee
Abrasive Developments Ltd
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
Priority claimed from GB5997368A external-priority patent/GB1247701A/en
Application filed by Abrasive Developments Ltd filed Critical Abrasive Developments Ltd
Application granted granted Critical
Publication of US3611640A publication Critical patent/US3611640A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/08—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces
    • B24C3/10—Abrasive blasting machines or devices; Plants essentially adapted for abrasive blasting of travelling stock or travelling workpieces for treating external surfaces
    • B24C3/12—Apparatus using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/003—Removing abrasive powder out of the blasting machine

Definitions

  • the nozzle assemblies have been mounted so that their outlets are on a single helix, we have found that when treating wire with such apparatus it sometimes happens that part of the surface of the wire is missed. This is because there is a twist in the wire as it comes off the coil and with a coil having a diameter of, for example, three feet the wire twists through every nine feet so that with the nozzle assemblies arranged with their outlets on a single helix it is sometimes possible to miss part of the surface of the wire due to this twist.
  • the outlets of the nozzle assemblies arranged on two or more helices spaced axially of the chamber by a small distance the area of the blast pattern is increased and there is considerably less chance of a portion of the wire treated being missed.
  • the nozzle assembly outlets on one helix lie opposite to the spaces between adjacent similar outlets on the other helix or other helices.
  • the nozzle assemblies are mounted in one or more inward helical projections on said parts so that the outlets of said nozzle assemblies do not extend from said projection or projections.
  • the apertured guide is left open with no wire passing through it air will be able to enter the chamber and the intensity of blasting in the chamber will be reduced resulting in loss of blasting efficiency and inadequate cleaning of the end portion of the wire which passes through the chamber while one of the guides is open.
  • the aperture means at the inlet end of the chamber when the end of the wire has passed through the aperture means at the inlet end of the chamber the aperture means will be closed and the blasting of the end portion of the wire will proceed with full efiiciency until it is withdrawn from the chamber at the outlet end thereof.
  • the introduction of the leading end of another coil will open the aperture means at the inlet end of the chamber but the aperture means at the outlet end will be closed once the trailing end of the previous coil has left it.
  • FIG. 4 is a cross-section on the line 44 of FIG. 2 through the blasting chamber
  • Each plate 19 and 20 carries a bearing housing 21 within which is mounted a pivot pin 22 rotatable in bearings 23.
  • Each pivot pin 22 is secured to an arm 24 and the arms 24 carry the part 14.
  • the arms 24 are secured to the pivot pins 22 and also secured to each of said pins is a collar 25 and a second arm 26.
  • Extending between the free ends of the arms 24 and 26 is a pivot pin 27 which, as shown in FIG. 3, carries an eye member 28 which is connected to the piston rod 29 of a hydraulic jack 30.
  • the arms 24 Upon operation of the two jacks 30, the arms 24 are moved from their full line positions in FIG. 3 to their chain-dotted line positions in that figure in which they are indicated at 24a and they carry with them the part 14 of the blasting chamber.
  • the blasting chamber is provided with a plurality of nozzle assemblies and these are arranged in two helices about the longitudinal axis of the blasting chamber, the helices being spaced axially of the chamber by a small distance compared with the total length of the chamber.
  • the air leaving the cyclone 78 passes through pipework indicated generally at 80 to the bottom of a bag filter 81 where any residual dust is separated out and received in a dust box 82, the substantially dust free air then passing through pipework 83 to an exhauster fan 84 driven by an electric motor 85. It will be seen, therefore, that the exhauster fan 84 applies suction to the suction conduit 71 ⁇ via the cyclones 75 and 78 and the filter 81 and thus is responsible for drawing primary air and abrasive into the chamber 10.
  • the reusable abrasive which falls to the bottom of the cyclone 75 is deflected by a battle 86 and is received in an upper hopper 87. From the upper hopper 87 the abrasive can pass into a middle hopper 88 when the pressures in the two hoppers are equal. The pressure in the hopper 88 is varied by means of first valve means 89.
  • An open topped, generally cylindrical lower hopper 93 is provided having within its base a conical baffle 94.
  • Third valve means, indicated generally at 95 is interposed between the middle hopper 88 and the lower hopper 93, the third valve means comprising a flap 96 mounted in a manner similar to the flap 91 i.e. pivoted about its upper edge so that it will move in response to the net resultant force exerted on it by differences in the pressures between the hoppers 88 and 93 and the weight of any abrasive in the hopper 88 acting on the flap 96.
  • the mixture of air and abrasive then enters the passage 56 in the lining 55 in each nozzle assembly and as the mixture flows past the holes 62 tertiary air is drawn in to mix with the primary air and abrasive and the mixture of pri mary and tertiary air and abrasive passes down the nozzle tubes 58 to be directed at a workpiece passing through the chamber in a manner to be described.
  • the closure flaps 38 and 44 When the closure flaps 38 and 44 are open, the wire is guided between the guides 36 and 43 and these restrict the entry of secondary air into the chamber around the periphery of the wire. Assuming that the wire is being processed in a number of coils, when the leading end of a new coil is fed into the chamber the flap 44 will be closed and the flap 38 will be displaced by the leading end of the wire. By virtue of the flap 44 being closed this will help to maintain the vacuum in the chamber 10. The wire holds open the flap 38 and the entry of secondary air is controlled by the clearance between the wire and the passage 37 as described above. The leading end of the wire will then open the closure flap 44 as described above. When the trailing end of the wire enters the chamber 10,
  • the abrasive, air and detritus leave the chamber 10 along the suction conduit 70 and pass through the cyclone where the reusable abrasive is separated out and passes through the hoppers 87, 88 and 93 by cycling of the first valve means 89 as will be described below until it is returned to the air inlet conduit 65 and it is thus recirculated to the nozzle assemblies 50 and 51.
  • the dust and abrasive which is no longer usable is removed in the second cyclone 78 and in the bag filter 81 so that the air discharged to atmosphere by the exhauster fan 84 is substantially dust free.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Nozzles (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US851354A 1968-12-17 1969-08-19 Abrading machines Expired - Lifetime US3611640A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5997368A GB1247701A (en) 1968-03-21 1968-03-21 Improvements in or relating to abrading machines

Publications (1)

Publication Number Publication Date
US3611640A true US3611640A (en) 1971-10-12

Family

ID=10484777

Family Applications (1)

Application Number Title Priority Date Filing Date
US851354A Expired - Lifetime US3611640A (en) 1968-12-17 1969-08-19 Abrading machines

Country Status (4)

Country Link
US (1) US3611640A (de)
BE (1) BE741980A (de)
DE (2) DE6946994U (de)
FR (1) FR2026316B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5709587A (en) * 1996-03-25 1998-01-20 Kennametal Inc. Method and apparatus for honing an elongate rotary tool
CN106826574A (zh) * 2017-03-16 2017-06-13 江苏龙城铸造机械科技有限公司 一种转盘式抛丸机

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5709587A (en) * 1996-03-25 1998-01-20 Kennametal Inc. Method and apparatus for honing an elongate rotary tool
US5762538A (en) * 1996-03-25 1998-06-09 Kennametal Inc. Method and apparatus for honing an elongate rotary tool
CN106826574A (zh) * 2017-03-16 2017-06-13 江苏龙城铸造机械科技有限公司 一种转盘式抛丸机

Also Published As

Publication number Publication date
FR2026316B1 (de) 1974-08-02
DE6946994U (de) 1971-01-07
BE741980A (de) 1970-05-04
FR2026316A1 (de) 1970-09-18
DE1960805A1 (de) 1970-07-02

Similar Documents

Publication Publication Date Title
US3286406A (en) Method and apparatus for abrading
US2621446A (en) Grit blasting device for cleaning pipes and the like
US1910497A (en) Sand blast gun
DE3619816C2 (de) Verfahren und Vorrichtung zum Expandieren von Tabak
US3157440A (en) Fibrous raw material feeding arrangements for spinning machines
US3741485A (en) Fluid energy grinder for increasing bulk density of materials
US3611640A (en) Abrading machines
US3829934A (en) Method and apparatus for homogenizing, teasing out and cleaning mixed fibrous materials
US20130125994A1 (en) Swarf extraction tool
EP0023905B1 (de) Systems zum verteilen und transportieren einer partikelsubstanz
US2158752A (en) Cotton drying and conditioning apparatus
GB2053293A (en) Method of and apparatus for feeding a fibre tow to a textile machine
US3611639A (en) Abrading machines
US2746807A (en) Apparatus for discharging pulverulent material
DE1299094B (de) Vorrichtung zum Einfuehren von zerkleinertem Feststoffmaterial, insbesondere von feuchter feinkoerniger Kohle, in einen zum Transport des Feststoffmaterials dienenden Druckgasstrom
GB1273844A (en) Abrasive blasting system
GB1247701A (en) Improvements in or relating to abrading machines
CH633461A5 (de) Vorrichtung zum trennen von miteinander verfilzten federn oder anderen zum verhaken neigenden gegenstaenden.
US1761493A (en) Pneumatic cotton picker or lapper
US3129573A (en) Hosiery delivery apparatus and method
US1238043A (en) Cotton-cleaner.
US2102499A (en) Cotton handling apparatus
DE3919715C1 (en) Cyclone heat exchanger for powders - has tapered outlet connected to enlarged second with sloping part, opening into discharge pipe
US3133319A (en) Process and apparatus for cleaning, separating and felting fibrous materials
US3073688A (en) Method for cleaning pipelines