EP0161260A1 - Procede pour le traitement abrasif d'une piece moulee. - Google Patents

Procede pour le traitement abrasif d'une piece moulee.

Info

Publication number
EP0161260A1
EP0161260A1 EP84902312A EP84902312A EP0161260A1 EP 0161260 A1 EP0161260 A1 EP 0161260A1 EP 84902312 A EP84902312 A EP 84902312A EP 84902312 A EP84902312 A EP 84902312A EP 0161260 A1 EP0161260 A1 EP 0161260A1
Authority
EP
European Patent Office
Prior art keywords
media
casting
vibrating
container
frame
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.)
Granted
Application number
EP84902312A
Other languages
German (de)
English (en)
Other versions
EP0161260A4 (fr
EP0161260B1 (fr
Inventor
Albert Musschoot
Robert H Bond
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.)
General Kinematics Corp
Original Assignee
General Kinematics Corp
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 General Kinematics Corp filed Critical General Kinematics Corp
Publication of EP0161260A1 publication Critical patent/EP0161260A1/fr
Publication of EP0161260A4 publication Critical patent/EP0161260A4/fr
Application granted granted Critical
Publication of EP0161260B1 publication Critical patent/EP0161260B1/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B24B31/06—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers
    • B24B31/064—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving oscillating or vibrating containers the workpieces being fitted on a support
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D29/00—Removing castings from moulds, not restricted to casting processes covered by a single main group; Removing cores; Handling ingots
    • B22D29/001—Removing cores
    • B22D29/005—Removing cores by vibrating or hammering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
    • B22D31/002—Cleaning, working on castings

Definitions

  • the present invention relates to a method and apparatus for scrubbing foreign material from internal and external surfaces of a part such as a casting.
  • a specific example of the general problems is in the casting industry wherein a variety of metal cast- ing processes are used, with one such process involving the use of inexpensive styrofoam patterns which have been coated with a ceramic-type material.
  • the patterns can be formed with intricate shapes having depressions, cavities, internal passages, crevices, chambers and the like.
  • the pattern is positioned in a mold box and sand is formed therearound ready for casting.
  • the styrofoam pattern melts away while the ceramic- type coating holds its shape long enough to form the metal casting.
  • the ceramic type coating however also breaks up during the process and in doing so leaves par ⁇ ticles of coating of foreign material or of sand adhered to the internal and external surfaces of the casting. Such particles or foreign material are, of course, unde ⁇ sirable in the finished product, and thus it is desirable to remove those particles. However, inasmuch as many castings will have internal passages, holes, crevices, chambers and the like which are hard to reach, the remov ⁇ al of those particles is difficult.
  • All molding systems suffer, in varying degrees, the same shortcomings namely, leaving residual particles or foreign material of the pattern and the molding sand on the external surfaces and in the internal surfaces of the castings.
  • the residual particles need to be purged from the casting before the casting is processed further and/or put into use.
  • the present invention is directed toward over ⁇ coming one or more of the problems as set forth above.
  • an apparatus which is usable for cleaning parts such as metal castings and in particular for cleaning particles or foreign material from the surface- and from the cavities of a part, the apparatus including a con ⁇ tainer of particulate media, a vibration generator for the container, the generator creating a vibratory motion which will fluidize the media, and means for suspending the part in the fluidized media.
  • the suspending means is also vibrated with a vibratory motion different from the vibratory motion of the container vibration generator so as to provide the part with a vibratory motion.
  • a method for cleaning out particles or foreign material from the cavities of a part, the method includ ⁇ ing the steps of vibrating a mass of particulate media with a vibratory motion which will fluidize the media, and locating the part in the media so that the media will -3-
  • a part such as a casting may be easily and inexpensively scrubbed to clean its internal and external surfaces as is desirable and often necessary.
  • Fig. 1 is a partial cross-sectional view of a first embodiment of the vibratory scrubber
  • Fig. 2 is a view taken along line 2-2 of Fig.
  • Fig. 3 is a partial enlarged cross-sectional view taken along line 3-3 of Fig. 1;
  • Fig. 4 is a cross-sectional view of a portion of the casting of Fig. 3 after scrubbing by the scrubber;
  • Fig. 5 is a partial cross-sectional view simi ⁇ lar to Fig. 1 of an alternative embodiment of the vibra ⁇ tory scrubber.
  • a vibratory scrubber 10 which is shown specifi ⁇ cally as scrubbing a casting and in one embodiment of the present invention is shown in Figs. 1 and 2.
  • the scrubber 10 includes a container 12 for particulate scrubbing media 14, such as steel shot, mixture of liquid and solids or any other fluidizable material, and the container 12 is fixed to a platform 16. Due to the weight of the container 12 and media 14, it is necessary to have a suitably reinforced platform 16, as for example by connecting spaced plates 18,20 with a bracing structure 22.
  • the platform 16 is mounted on four corners to springs 24 which are themselves mounted on a base 26 suitably secured to the floor 30.
  • Vibration generators 34 of any well known type is provided with the vibration generator shown being in the form of electric motors 36 having shafts 38 carrying eccentric weights 40. The generators are suspended from the bottom of the platform 16 in order to produce the vibrations.
  • the vibration generators 34 may be of the type shown in U.S. Patent No. 3,358,815 where the effec ⁇ tive force of the eccentric weights may be varied from zero to maximum and thus produce a variation in stroke as desired.
  • Other types of vibration generators could be substituted for the eccentric vibration generators 34, such as hydraulic vibrators and the like.
  • the vibration generators 34 are energized to produce a vibratory motion for the container 12 and its contents in excess of the acceleration due to gravity.
  • S is the amplitude of the stroke in inches
  • F is the frequency of the stroke in strokes per minute. For example, with a frequency of 3600 strokes per minute and a stroke amplitude of 0.007 inches, there is produced an acceleration of 1.29 g's on the container 12 and the media 14. This acceleration causes the media 14 to be ⁇ come fluidized, and thereby to flow freely.
  • a part or casting supporting structure 44 Suspended by a chain 42 above the container 12 is a part or casting supporting structure 44 comprised of a frame 46, made of I-beams 48, having sufficient rigidity
  • a mounting beam 52 depends vertically downward from the frame 46 and is adaptable for mounting a desired number and type of part or casting 50.
  • two cast- ings 50,50 are fixed to the mounting beam 52 by bolting flanges 54 of the castings 50 onto the mounting beam 52.
  • other means of fixing the parts or castings 50 shown, as well as other types of parts or castings, to the mounting beam 52 would be suitable and apparent to those skilled in the art. It is important that the open ⁇ ings 53 into the passageways 55 be kept open and unob ⁇ structed so that the media 14 can flow freely into and out of the passageways.
  • the frame 46 is directly connected to a second set of vibration generators 60, each of which- in the illustrated form also comprises an electric motor 62 driving a shaft 64 having synchronized eccentric weights 66 on both ends.
  • a second set of vibration generators 60 each of which- in the illustrated form also comprises an electric motor 62 driving a shaft 64 having synchronized eccentric weights 66 on both ends.
  • the second set of vibration generators 60 are suspended from an upper plate 70 by a pair of springs 72.
  • the upper plate 70 has a bracket 74 which is connected to the supporting chain 42.
  • the upper plate 70 is isolated from the vibrations of the vibration generators 60 by the springs 72.
  • Suitable means are provided to manipulate the chain 42 so as to lower the frame 46 and mounting beam 52 to locate the castings 50 in the media 14, and also to raise the frame 46 from the media ready for re ⁇ moval of the castings or parts 50.
  • Castings or parts 50 may be manufactured using styrofoam patterns which have been coated with a ceramic- type material.
  • the styrofoam pattern is essentially melted away and the ceramic-type coating holds its shape long enough to • form the casting 50 but then breaks up as well.
  • This process leaves par ⁇ ticles or foreign material 80 (see Fig. 3) of the coating as well as other materials adhered to the external sur ⁇ faces 82 and internal surface 84 of the casting 50.
  • the scrubber 10 is used to remove these particles or foreign material 80 from all surfaces both external 82 and inter ⁇ nal 84 of the casting 50.
  • the castings or parts 50 are fixed to the mounting beam 52 and then the vibration generator 34 .for the container 12 and media and the generator 60 for the frame 46 and parts 50 are energized.
  • the vibrating frame 46 is low ⁇ ered to locate the parts, or castings 50 into the vibrat- ' ing media ' 14 which is easily accomplished inasmuch as the media 14 in the container 12 is fluidized by the vibra ⁇ tions of the generators 34.
  • the media 14 thus easily flows about the casting 50 and into crevices and passage ⁇ ways in the casting 50, and the vibration of the casting 50 itself ensures that the media 14 will flow freely into any such crevices and passageways in the casting 50 as well.
  • the flow of the media 14 about the external sur ⁇ faces 82 and through the passageways over the internal surfaces 84 in the castings 50 is abrasive on the sur ⁇ faces of the castings 50 and thus the particles or for- eign materials 80 are scrubbed clean from the parts or castings.
  • the result is a clean and, with certain types of materials, shiny casting 50 as shown in Fig. 4.
  • the vibration generators 60 on the supporting structure 44 may continue to be driven as the structure 44 is raised to remove the part or casting 50 from the container 12 so as to discharge the media and freed for- eign material or particles 80 from the passageways 55 in the parts or castings.
  • FIG. 5 An alternative embodiment of the vibratory scrubber 10' is shown in Fig. 5.
  • the same reference numerals are used for the members that are identical to Fig. 1.
  • This scrubber 10' uses a two mass system for vibrating the part or casting 50.
  • the set of vibration generators 60 used to apply a vibratory motion to the frame 52 and part 50 are not directly attached to the frame 46', but rather are at- tached to a second set of springs 88 extending between the first set of vibration generators 60 and a working weight 90 carried by the frame 46' and mounting beam 52.
  • the second set of springs 88 are used to tune the vi ⁇ brations of the frame 46 for enhancing the vibratory motion of the part or casting 50.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Bridges Or Land Bridges (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

Appareil utilisable pour laver un matériau étranger des surfaces internes et externes d'une partie (50), contenant un récipient de milieu particulaire (14) un générateur de vibrations (34) pour le récipient qui provoque une amplitude et une fréquence fluidisant le milieu, ainsi qu'un mécanisme (46) pour suspendre la partie dans le milieu fluidisé. On fait vibrer le mécanisme de suspension à une amplitude et une fréquence différentes de l'amplitude et de la fréquence du récipient, grâce à quoi le milieu fluidisé va laver le matériau étranger des surfaces internes et externes de la partie.
EP19840902312 1983-11-09 1984-05-29 Procede pour le traitement abrasif d'une piece moulee Expired EP0161260B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54982783A 1983-11-09 1983-11-09
US549827 1983-11-09

Publications (3)

Publication Number Publication Date
EP0161260A1 true EP0161260A1 (fr) 1985-11-21
EP0161260A4 EP0161260A4 (fr) 1986-02-20
EP0161260B1 EP0161260B1 (fr) 1989-08-23

Family

ID=24194515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840902312 Expired EP0161260B1 (fr) 1983-11-09 1984-05-29 Procede pour le traitement abrasif d'une piece moulee

Country Status (6)

Country Link
EP (1) EP0161260B1 (fr)
JP (1) JPS61500351A (fr)
AU (1) AU558075B2 (fr)
DE (1) DE3479484D1 (fr)
FI (1) FI77170C (fr)
WO (1) WO1985002136A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3225356A1 (fr) * 2016-04-01 2017-10-04 Rolls-Royce plc Procédés et appareil de vibro-traitement
WO2021070024A1 (fr) * 2019-10-10 2021-04-15 3M Innovative Properties Company Procédé de modification d'une surface d'une pièce ouvrée
US11699300B2 (en) 2015-06-30 2023-07-11 Samsung Electronics Co., Ltd. Methods and apparatuses for updating user authentication data

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649919B1 (fr) * 1989-07-21 1991-10-04 Peugeot Installation de nettoyage de pieces de fonderie
JP2550231B2 (ja) * 1991-06-18 1996-11-06 株式会社日立製作所 磁気記録媒体の製造方法
CA2353694C (fr) * 1998-11-14 2008-03-18 Mtu Aero Engines Gmbh Dispositif pour l'usinage de precision de composants a symetrie de revolution
JP2010131675A (ja) * 2007-03-02 2010-06-17 Ee P C Aero Specialty Kk 振動式研磨処理方法および装置
JP7331637B2 (ja) * 2019-11-05 2023-08-23 トヨタ自動車株式会社 付着物除去方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1067656A (en) * 1965-12-22 1967-05-03 Wissenchaftlich Tech Zentrum A Method for the abrasive treatment of workpieces

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230669A (en) * 1963-03-05 1966-01-25 Boeing Co Deburring apparatus
US3581440A (en) * 1969-05-27 1971-06-01 Shell Oil Co Resonant apparatus for cleaning castings and the like
JPS5038860U (fr) * 1973-08-08 1975-04-22
JPS583960Y2 (ja) * 1978-09-27 1983-01-24 株式会社日立製作所 ピストン
SU799940A1 (ru) * 1979-04-11 1981-01-30 Среднеазиатский Филиал Государственноговсесоюзного Ордена Трудовогокрасного Знамени Научно-Исследо-Вательского И Технологическогоинститута Pemohta И Эксплуатациимашинно-Тракторного Парка Установка дл вибрационнойОчиСТКи издЕлий
CA1177221A (fr) * 1980-12-04 1984-11-06 General Kinematics Corporation Tassement vibratoire du sable de moulage dans un modele avant la coulee du metal
JPS5947156A (ja) * 1982-09-10 1984-03-16 Shintou Bureetaa Kk 油圧振動式表面研摩方法およびその装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1067656A (en) * 1965-12-22 1967-05-03 Wissenchaftlich Tech Zentrum A Method for the abrasive treatment of workpieces

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
RUSSIAN ENGINEERING JOURNAL, vol. 47, no. 5, 1967, pages 60-61; I.M. TRAKHTENBERG: "Vibratory cleaning metal plates and components" *
See also references of WO8502136A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11699300B2 (en) 2015-06-30 2023-07-11 Samsung Electronics Co., Ltd. Methods and apparatuses for updating user authentication data
EP3225356A1 (fr) * 2016-04-01 2017-10-04 Rolls-Royce plc Procédés et appareil de vibro-traitement
US10406651B2 (en) * 2016-04-01 2019-09-10 Rolls-Royce Plc Methods of vibro-treating and vibro-treating apparatus
WO2021070024A1 (fr) * 2019-10-10 2021-04-15 3M Innovative Properties Company Procédé de modification d'une surface d'une pièce ouvrée

Also Published As

Publication number Publication date
JPS61500351A (ja) 1986-03-06
FI77170C (fi) 1989-02-10
AU2967184A (en) 1985-06-03
FI852702A0 (fi) 1985-07-08
FI77170B (fi) 1988-10-31
AU558075B2 (en) 1987-01-15
FI852702L (fi) 1985-07-08
WO1985002136A1 (fr) 1985-05-23
EP0161260A4 (fr) 1986-02-20
EP0161260B1 (fr) 1989-08-23
DE3479484D1 (en) 1989-09-28
JPH0547349B2 (fr) 1993-07-16

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