US3824739A - Method and apparatus for continuously removing burrs from objects - Google Patents

Method and apparatus for continuously removing burrs from objects Download PDF

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Publication number
US3824739A
US3824739A US00335317A US33531773A US3824739A US 3824739 A US3824739 A US 3824739A US 00335317 A US00335317 A US 00335317A US 33531773 A US33531773 A US 33531773A US 3824739 A US3824739 A US 3824739A
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US
United States
Prior art keywords
objects
shot
insulated
chamber
burrs
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
US00335317A
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English (en)
Inventor
B Moret
J Dufetele
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Air Liquide SA
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Air Liquide SA
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Filing date
Publication date
Application filed by Air Liquide SA filed Critical Air Liquide SA
Application granted granted Critical
Publication of US3824739A publication Critical patent/US3824739A/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/083—Deburring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P25/00—Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress
    • 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
    • B24C3/14—Apparatus using impellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/18—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions
    • B24C3/26—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions the work being supported by barrel cages, i.e. tumblers; Gimbal mountings therefor
    • B24C3/263—Abrasive blasting machines or devices; Plants essentially provided with means for moving workpieces into different working positions the work being supported by barrel cages, i.e. tumblers; Gimbal mountings therefor using refrigerating means

Definitions

  • a device for removing burrs from objects thermally insulated from the ambient air consists of subjecting the objects to a blast of granular shot, which is re cycled after separating-out the removed burrs and is led back to a storage hopper, the shot being continuously insulated thermally from the ambient air and being cooled, simultaneously with the objects by a cold gas in the liquefied form or in course of vaporization.
  • the apparatus comprises a shot-blasting chamber in the form of a heat-insulated tunnel containing a continuously moving conveyor belt on vvhich the objectsare disposed.
  • the present invention relates to a method of trimming or removing burrs from objects which are thermally insulated from the ambient air, by subjecting them to a mechanical action after they have been cooled, at least on their surface, to below C.
  • Removal of burrs is generally carried out, either by hand with the aid of chisels, various kinds of cutting tools, rotary brushes, or by machine but in a noncontinuous manner, in rotating tumbling-drums or in vibrating machines.
  • the objects may be cooled in order to render their burrs brittle at the ordinary temperature.
  • the method according to the invention utilizes a cryogenic gas in the liquid form, if so desired in course of vaporizatiomin order to cool the objects and the shot simultaneously.
  • Another object of the invention is to make the operations both automatic and continuous.
  • the invention is further characterized in that the objects are caused to circulate in a continuous movement in contact with a cooling agent, after which their surfaces are treated, with a mechanical burr-removing agent in the form of a jet of granular shot.
  • an endless belt 4 circulates continuously.
  • This belt may be of very varied nature, for example of metallic fabric or of plates articulated on each other.
  • a liquefied gas for example a liquefied permanent gas, a halogenated hydrocarbon with a low boiling point, or initially liquefied carbon dioxide a cold brine a gas cooled by a frigorifle or cryogenic set the vapours of a cryogenic liquid such as liquid nitrogen, etc.
  • a liquefied gas for example a liquefied permanent gas, a halogenated hydrocarbon with a low boiling point, or initially liquefied carbon dioxide a cold brine a gas cooled by a frigorifle or cryogenic set the vapours of a cryogenic liquid such as liquid nitrogen, etc.
  • the objects then pass under jets of shot projected by a wheel enclosed in a casing 12 and which is itself cold. At the same time, they are agitated by a vibrator 14 which shakes the belt and changes the orientation of the objects so that they are attacked by the shot at vari- 18.
  • the sloping face may be replaced by a device arranged lower and on which the objects are delivered from the belt.
  • the shot having acted and the removed burrs having fallen into a recovery tank 20, are then led into a separator 22.
  • This separator a sieve or pneumatic separator for example, separates the shot from the fragments of burrs which are evacuated through a tube 24, the shot passing through a conduit 26 to a raising device 28.
  • This latter may be of various kinds: chain and scoops, inclined belt, endless screw, etc.
  • the shot is led through a conduit 30 to a hopper 32 in which the shot is stored before being sent to the projection wheel in the casing 12.
  • the shot is cooled, for example by extracting through a tube 34 a cooling fluid contained in a tank 36 which also supplies the system 10.
  • This fluid is for example liquid nitrogen.
  • the whole of the shot recycling circuit such as the separator 22, conduit 26, raising device 28, conduit 30, hopper 32, is thermally insulated from the ambient atmosphere, for example by placing this circuit in an insulated chamber (not shown in the drawing).
  • the refrigerant fluid When the refrigerant fluid becomes vaporized in contact with the objects, it emits abundant cold vapours. These vapours escape through the extremities of the tunnel, those escaping towards the left serving to effect a pre-cooling of the objects.
  • the quantity of vapour escaping through the right-hand extremity can be reduced by fixing at the right-hand extremity 38 of the tunnel cover, a hanging curtain made of strips of plastic material which remain flexible in the cold state.
  • the delivery rate of shot controlled for example by a tachometer 44 which measures the speed of a motor 46 actuating the raising device.
  • One or a number of temperature tappings in the tunnel with temperature detector 48 and indicator 50.
  • the orientation of the objects may be modified between two shot-blasting periods, for example by oblique surfaces, by push-rods, or alternatively by bringing them on to a second suitably orientated belt.
  • the cooling system may be constituted by the whole of a first device, from which passes out a cold fluid, and of a second device, drawing-in this fluid through the objects to be cooled and bringing it back to the first, after cooling.
  • the device described may be modified without thereby departing from the scope of the present invention.
  • it may employ a number of cooling devices, several machines for projecting shots, and rotating brushes.
  • the device actuating the burr-removal agent may be given movements which change its orientation, and the cooling of the shot may be dispensed with.
  • the method of the invention is especially applicable to the removal of burrs from a large quantity of objects of the same type. It can even be employed for parts having a length greater than that of the tunnel.
  • the nature of these objects may be very diverse, provided that they can be rendered brittle on the surface by an inexpensive cooling, such as for example with liquid nitrogen.
  • These materials may for example be moulded polyurethane, cellular or not, a large number of thernoplastic materials, rubber, many metals and alloys. In this way, burrs may be removed from tooling keys, dash boards for automobiles, moulded parts of zamak, etc.
  • a device for removing burrs from objectsby projection of granular shot on said objects, previously cooled, at least at their surface, of the kind comprising a shot-blasting chamber, thermally insulated, means for projecting said shot, a re-cycling circuit for the shot projected from said chamber to a hopper adapted to supply said projection means, means for injecting a cryogenic liquid into said chamber, said device further comprising means for injecting said cryogenic fluid into said shot-recycling circuit, and especially into said supply hopper.
  • a device for continuously removing burrs from objects as claimed in claim 1, said device further comprising a chamber in the form of a heat-insulated tunnel said tunnel comprising a conveyor belt in continuous movement, on which said objects are disposed.
  • a device as claimed in claim 2 said device further comprising means for putting said objects into contact with a liquefied gas, and means for previously putting said objects into contact with the vapours of said liquefied gas.
  • a device as claimed in claim 2 and further comprising means for causing said conveyor belt to vibrate at a position in which the objects carried are subjected to the jet of granular shot.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
US00335317A 1972-02-29 1973-02-23 Method and apparatus for continuously removing burrs from objects Expired - Lifetime US3824739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7206765A FR2174331A5 (nl) 1972-02-29 1972-02-29

Publications (1)

Publication Number Publication Date
US3824739A true US3824739A (en) 1974-07-23

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ID=9094282

Family Applications (1)

Application Number Title Priority Date Filing Date
US00335317A Expired - Lifetime US3824739A (en) 1972-02-29 1973-02-23 Method and apparatus for continuously removing burrs from objects

Country Status (5)

Country Link
US (1) US3824739A (nl)
BE (1) BE796073A (nl)
CA (1) CA972960A (nl)
FR (1) FR2174331A5 (nl)
IT (1) IT979377B (nl)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934379A (en) * 1974-09-03 1976-01-27 Wisconsin Alumni Research Foundation Removal of built up layers of organic coatings
US4160650A (en) * 1978-04-20 1979-07-10 Nfe International, Ltd. Sand core cleaning apparatus with double roller delivery of cleaning material
US4164103A (en) * 1976-11-02 1979-08-14 Messer Griesheim Gmbh Device for deburring workpieces
US4236936A (en) * 1979-02-21 1980-12-02 Ernst Schuh Method for cleaning articles by spraying
EP0037653A1 (en) * 1980-03-17 1981-10-14 Air Products And Chemicals, Inc. Apparatus for cryogenic shot-blast deflashing
EP0041797A1 (en) * 1980-06-05 1981-12-16 Parfloor Limited Surface treatment
US4369605A (en) * 1980-07-11 1983-01-25 Monsanto Company Methods for preparing tube sheets for permeators having hollow fiber membranes
US4519171A (en) * 1983-01-26 1985-05-28 Air Products And Chemicals, Inc. Work-holding fixture for cryogenic decoating
US4519812A (en) * 1983-10-28 1985-05-28 Aga Ab Cryogen shot blast deflashing system with jointed supply conduit
US4524550A (en) * 1982-11-30 1985-06-25 Air Products And Chemicals, Inc. Discharge of blasting media from a treating chamber
US4527844A (en) * 1983-01-26 1985-07-09 Air Products And Chemicals, Inc. Thermally insulated chamber
US4598501A (en) * 1983-10-28 1986-07-08 Aga Ab Cryogen shot blast deflashing system with bellows return conduit
US4627197A (en) * 1983-12-08 1986-12-09 Air Products And Chemicals, Inc. Process control for cryogenic decoating
US4646484A (en) * 1983-10-28 1987-03-03 Aga Ab Cryogen shot blast deflashing apparatus with inert gas purging system
US4648214A (en) * 1983-10-28 1987-03-10 Aga Ab Cryogen shot blast deflashing system
US4693756A (en) * 1984-07-17 1987-09-15 Schlick Roto-Jet Maschinenbau Gmbh Method and retort for the removal of carbonizable coatings from the surfaces of metal objects
AU594728B2 (en) * 1985-12-12 1990-03-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and apparatus for the mechanical treatment of work pieces
US5074083A (en) * 1990-02-14 1991-12-24 Mitsubishi Denki Kabushiki Kaisha Cleaning device using fine frozen particles
WO2002092283A2 (en) * 2001-05-14 2002-11-21 Universal Ice Blast, Inc. Ice blast cleaning cabinet
US20040185757A1 (en) * 2003-03-20 2004-09-23 Nissanki Co., Ltd. Washing device
EP2205413A1 (en) * 2007-09-21 2010-07-14 Air Products and Chemicals, Inc. Apparatus and method for machining polymers with controlled cryogenic cooling
WO2011026864A2 (en) * 2009-09-01 2011-03-10 Spanolux N.V.- Div. Balterio Method of manufacturing a covering panel with a profiled edge
EP3231556A4 (en) * 2014-12-08 2018-05-23 Sintokogio, Ltd. Burr removal device and burr removal method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2073184A (en) * 1935-11-11 1937-03-09 Howard V Schweitzer Apparatus for cleaning articles of ceramic materials
US2996846A (en) * 1959-07-29 1961-08-22 Bell Intercontrinental Corp Method and means for deflashing or trimming molded rubber parts
US3110983A (en) * 1962-12-06 1963-11-19 Pangborn Corp Method and apparatus for deflashing molded resilient pieces

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2073184A (en) * 1935-11-11 1937-03-09 Howard V Schweitzer Apparatus for cleaning articles of ceramic materials
US2996846A (en) * 1959-07-29 1961-08-22 Bell Intercontrinental Corp Method and means for deflashing or trimming molded rubber parts
US3110983A (en) * 1962-12-06 1963-11-19 Pangborn Corp Method and apparatus for deflashing molded resilient pieces

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3934379A (en) * 1974-09-03 1976-01-27 Wisconsin Alumni Research Foundation Removal of built up layers of organic coatings
US4164103A (en) * 1976-11-02 1979-08-14 Messer Griesheim Gmbh Device for deburring workpieces
US4160650A (en) * 1978-04-20 1979-07-10 Nfe International, Ltd. Sand core cleaning apparatus with double roller delivery of cleaning material
US4236936A (en) * 1979-02-21 1980-12-02 Ernst Schuh Method for cleaning articles by spraying
EP0037653A1 (en) * 1980-03-17 1981-10-14 Air Products And Chemicals, Inc. Apparatus for cryogenic shot-blast deflashing
US4312156A (en) * 1980-03-17 1982-01-26 Air Products And Chemicals, Inc. Apparatus for cryogenic shot-blasting
EP0041797A1 (en) * 1980-06-05 1981-12-16 Parfloor Limited Surface treatment
US4369605A (en) * 1980-07-11 1983-01-25 Monsanto Company Methods for preparing tube sheets for permeators having hollow fiber membranes
US4524550A (en) * 1982-11-30 1985-06-25 Air Products And Chemicals, Inc. Discharge of blasting media from a treating chamber
US4527844A (en) * 1983-01-26 1985-07-09 Air Products And Chemicals, Inc. Thermally insulated chamber
US4519171A (en) * 1983-01-26 1985-05-28 Air Products And Chemicals, Inc. Work-holding fixture for cryogenic decoating
US4646484A (en) * 1983-10-28 1987-03-03 Aga Ab Cryogen shot blast deflashing apparatus with inert gas purging system
US4598501A (en) * 1983-10-28 1986-07-08 Aga Ab Cryogen shot blast deflashing system with bellows return conduit
US4519812A (en) * 1983-10-28 1985-05-28 Aga Ab Cryogen shot blast deflashing system with jointed supply conduit
US4648214A (en) * 1983-10-28 1987-03-10 Aga Ab Cryogen shot blast deflashing system
US4627197A (en) * 1983-12-08 1986-12-09 Air Products And Chemicals, Inc. Process control for cryogenic decoating
US4693756A (en) * 1984-07-17 1987-09-15 Schlick Roto-Jet Maschinenbau Gmbh Method and retort for the removal of carbonizable coatings from the surfaces of metal objects
AU594728B2 (en) * 1985-12-12 1990-03-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and apparatus for the mechanical treatment of work pieces
US5074083A (en) * 1990-02-14 1991-12-24 Mitsubishi Denki Kabushiki Kaisha Cleaning device using fine frozen particles
WO2002092283A3 (en) * 2001-05-14 2003-11-13 Universal Ice Blast Inc Ice blast cleaning cabinet
WO2002092283A2 (en) * 2001-05-14 2002-11-21 Universal Ice Blast, Inc. Ice blast cleaning cabinet
US6719612B2 (en) * 2001-05-14 2004-04-13 Universal Ice Blast, Inc. Ice blast cleaning cabinet
US20040185757A1 (en) * 2003-03-20 2004-09-23 Nissanki Co., Ltd. Washing device
US7070487B2 (en) * 2003-03-20 2006-07-04 Nissanki Co., Ltd. Washing device
EP2205413A1 (en) * 2007-09-21 2010-07-14 Air Products and Chemicals, Inc. Apparatus and method for machining polymers with controlled cryogenic cooling
US20100193980A1 (en) * 2007-09-21 2010-08-05 Air Products And Chemicals, Inc. Apparatus and method for machining polymers with controlled croygenic cooling
EP2205413A4 (en) * 2007-09-21 2011-08-03 Air Prod & Chem APPARATUS AND METHOD FOR MACHINING POLYMERS WITH REGULATED CRYOGENIC COOLING
US8820199B2 (en) 2007-09-21 2014-09-02 Air Products And Chemicals, Inc. Apparatus and method for machining polymers with controlled croygenic cooling
WO2011026864A2 (en) * 2009-09-01 2011-03-10 Spanolux N.V.- Div. Balterio Method of manufacturing a covering panel with a profiled edge
WO2011026864A3 (en) * 2009-09-01 2011-06-23 Spanolux N.V.- Div. Balterio Method of manufacturing a covering panel with a profiled edge
EP3231556A4 (en) * 2014-12-08 2018-05-23 Sintokogio, Ltd. Burr removal device and burr removal method

Also Published As

Publication number Publication date
FR2174331A5 (nl) 1973-10-12
BE796073A (fr) 1973-08-28
IT979377B (it) 1974-09-30
CA972960A (en) 1975-08-19

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