EP1658931B1 - Vibrotumbling machine - Google Patents

Vibrotumbling machine Download PDF

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Publication number
EP1658931B1
EP1658931B1 EP20050257000 EP05257000A EP1658931B1 EP 1658931 B1 EP1658931 B1 EP 1658931B1 EP 20050257000 EP20050257000 EP 20050257000 EP 05257000 A EP05257000 A EP 05257000A EP 1658931 B1 EP1658931 B1 EP 1658931B1
Authority
EP
European Patent Office
Prior art keywords
manufactured product
machine
abrasive
mix
abrasive mix
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.)
Active
Application number
EP20050257000
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1658931A1 (en
Inventor
Lorenzo Pierucci
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.)
Nuovo Pignone SpA
Original Assignee
Nuovo Pignone 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 Nuovo Pignone SpA filed Critical Nuovo Pignone SpA
Publication of EP1658931A1 publication Critical patent/EP1658931A1/en
Application granted granted Critical
Publication of EP1658931B1 publication Critical patent/EP1658931B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24B31/10—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 other means for tumbling of work
    • B24B31/116—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 other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
    • 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
    • B24B31/003—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 whereby the workpieces are mounted on a holder and are immersed in the abrasive material
    • 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
    • B24B31/006—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 for grinding the interior surfaces of hollow workpieces

Definitions

  • the present invention relates to a vibrotumbling machine, in particular applicable for the processing of manufactured products having at least one cavity or inner surface.
  • Vibrotumbling processes represent an economical solution for removing the surface layer in the case of at least one surface obtained in particular by means of electro-erosion techniques.
  • An example of this type of manufactured product consists of objects having at least one cavity, such as rotors, in particular.
  • the processing of external surfaces with vibrotumbling is simple and economical, as the manufactured product to be processed is immersed in an abrasive mix.
  • the abrasive mix normally includes various elements of material which is usually not particularly hard, known by the English term as "media”, abrasive particles, water and additives.
  • the function of the various material elements, i.e. the media, is to transmit kinetic energy to the abrasive particles so that these strike against the manufactured product to be processed.
  • Each media element is surrounded by abrasive particles present in the abrasive mix and receives the vibrations from the vibrating means through the container.
  • a vibrational movement is therefore conferred to the abrasive mix machines for vibrotumbling or vibrofinishing currently on the market, which is subsequently transmitted to a manufactured product to be processed or surface smoothed.
  • a vibration is transmitted to a manufactured product to be processed by means of an abrasive mix in which the manufactured product is fully immersed; the abrasive mix is kept in a container which is subjected to vibration.
  • the vibration is, in turn, transmitted to the abrasive mix and, consequently, to the manufactured product.
  • the relative movement of the abrasive mix with respect to the surface of the product to be processed is exclusively created by the vibration induced to the abrasive mix by means of the vibration means.
  • the abrasive means reach the inner surfaces with no vibrational energy or, even worse, remain inside said grooves or cavities.
  • Another drawback is that, for wider sections, in any case, a non-uniform abrasion of the surface is obtained, mainly close to the external portions of the product to be processed.
  • WO 00/32355 describes a mixture, method and apparatus for polishing parts using vibration of a polishing mixture pumped through a cavity to be polished.
  • US 3 584 419 describes an apparatus according to the preamble of claim 1 for cleaning a cavity of a casting where an abrasive is run straight through the cavity.
  • An objective of the present invention is to provide a vibrotumbling machine capable of processing inner surfaces such as groves, cavities, housings and holes, even when these are thin and narrow.
  • Another objective of the present invention is to produce a vibrotumbling machine capable of uniformly removing material from at least one inner surface of a manufactured product having at least one cavity or indentation to be processed.
  • a further objective is to provide a vibrotumbling machine capable of effectively and uniformly processing both inner and outer surfaces.
  • Yet another objective is to have a simple and economical vibrotumbling machine.
  • these show a machine 10 for the vibrotumbling of a manufactured product 18, such as, for example, a rotor, by means of an abrasive mix comprising various elements of not particularly hard material, abrasive particles, water and additives.
  • Said machine 10 comprises vibration means for causing a relative movement between said abrasive mix and said manufactured product 18, to obtain its processing.
  • Said vibration means are associated with said manufactured product 18 to make it vibrate directly and obtain its processing.
  • Said vibration means are preferably associated with said manufactured product 18 by means of a rod 20 or said vibration means are directly connected to said manufactured product 18.
  • Said machine 10 also comprises pressure means for obtaining a forced flow of said abrasive mix with respect to said manufactured product 18, in particular for obtaining a forced flow inside at least one cavity of said manufactured product 18.
  • Said pressure means preferably include a column of abrasive mix situated above said manufactured product 18 to force the relative flow with respect to the same of a part of abrasive mix which is close to the manufactured product 18, in order to uniformly remove material therefrom.
  • said rotor 18 is fed with the commercial abrasive mix (means, abrasive product, water, additives) by means of a rubber collector 62, shown in figure 3 , which receives the mix from a feeding duct 61 connected to a tank 60, suspended about 1,000 mm above.
  • a rubber collector 62 shown in figure 3 , which receives the mix from a feeding duct 61 connected to a tank 60, suspended about 1,000 mm above.
  • said machine 10 preferably comprises a frame 12 to which said rod 20 is constrained by means of elastic means 40, such as, in particular, a series of springs.
  • Said rod 20 is preferably constrained at a first upper end 21 to said frame 12 by means of a series of vertical guides 45 and suspended to said frame by means of said elastic means 40, which allow a relative movement of the rod 20 with respect to the frame 12 in a vertical direction.
  • Said vertical rod 20 also has a lower end 22 on which said rotor 18 is tightened, and said upper end 21 is connected to vibration means such as, in particular, a non- balanced motor 30 which transmits vibrations thereto.
  • Said motor 30 is preferably situated above said frame 12 and it is preferably constrained to said upper end 21 of said rod 20 by means of a disk 24 integral with said rod 20.
  • the vibration means are thus directly associated with the manufactured product 18 to be processed and are therefore capable of transmitting vibrations to the same without any kind of attenuation.
  • Said machine 10 preferably comprises a rubber collector 62 to channel said mix into said at least one cavity of said manufactured product 18, or thereon.
  • Said pressure means preferably include a tank 60 and a feeding duct 61 which comprises a first end and a second end, said first end is situated downstream of said tank 60 and said second end is upstream of said manufactured product 18 to allow the abrasive mix to flow against said manufactured product 18.
  • Said tank 60 is situated above said duct 61, below which a rubber collector 62 is connected to channel said abrasive mix into said at least one cavity of said manufactured product 18.
  • Said second end of said feeding duct 61 is preferably connected upstream of said collector 62 to allow the abrasive mix to flow against said manufactured product 18.
  • Said tank 60 is preferably suspended about 1,000 mm above said manufactured product 18, so that the weight of the column of abrasive mix itself, contained in the duct 61, causes a pressure on the part of the abrasive mix in contact with, or close to, said manufactured product 18.
  • Said machine 10 comprises a basin 63 constrained to said manufactured product, which surrounds said manufactured product to allow both inner and outer surfaces of the same to be contemporaneously processed.
  • said abrasive mix After flowing through said at least one cavity of said rotor 18, said abrasive mix is, in fact, collected inside said basin 63, and in this way it also processes the outer surface of said manufactured product 18.
  • Said machine 10 comprises said container 64, which collects said abrasive mix when this falls from the basin 63.
  • the exhausted abrasive mix collected in the container 64 is then washed, mixed with new abrasive material and then reintroduced into the upper tank 60.
  • This functioning can be effected by manual means or with automatic means to provide a continuous working cycle.
  • the abrasive machine 10 has the following innovative characteristics:
  • the abrasive mix is forced to flow inside at least one inner surface by means of pressure means, increasing the relative movement between the abrasive particles dispersed in the mix and the inner surface of said inner cavity to be processed.
  • pressure means for forcing said abrasive mix onto said at least one inner surface to be processed advantageously prevents the abrasive mix from stagnating inside the holes and cavities of the rotor and other components, obtaining the evacuation of the eroded material.
  • the vibrotumbling machine of the present invention is advantageously extremely efficient in the case of inner surfaces which are difficult to reach or inaccessible, such as grooves, cavities and holes, in particular.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP20050257000 2004-11-17 2005-11-14 Vibrotumbling machine Active EP1658931B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20042203 ITMI20042203A1 (it) 2004-11-17 2004-11-17 Macchina per la vibro-burattatura

Publications (2)

Publication Number Publication Date
EP1658931A1 EP1658931A1 (en) 2006-05-24
EP1658931B1 true EP1658931B1 (en) 2009-06-17

Family

ID=35840125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050257000 Active EP1658931B1 (en) 2004-11-17 2005-11-14 Vibrotumbling machine

Country Status (5)

Country Link
EP (1) EP1658931B1 (zh)
JP (1) JP5122739B2 (zh)
CN (1) CN1775475B (zh)
DE (1) DE602005014924D1 (zh)
IT (1) ITMI20042203A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10179388B2 (en) 2009-05-12 2019-01-15 Rem Technologies, Inc. High throughput finishing of metal components
CN103737475B (zh) * 2014-01-11 2016-03-30 太仓椿盟链传动有限公司 一种链条销轴倒角抛光机加粉装置
CN110561261B (zh) * 2019-09-09 2021-02-26 西安建筑科技大学 一种异型小口径管内壁的气动式机械除锈装置及工艺

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3722149A (en) * 1965-01-05 1973-03-27 A Bodine Grit pad cleaner
US3584419A (en) * 1969-10-03 1971-06-15 Hartmann Mfg Co M W Apparatus and method for cleaning hollow castings
DE2817312C2 (de) * 1978-04-20 1986-09-25 Carl Kurt Walther Gmbh & Co Kg, 5600 Wuppertal Vibrationsgleitschleifverfahren einschließlich Vorrichtung zur Durchführung desselben
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
JPS62107963A (ja) * 1985-11-01 1987-05-19 Hitachi Ltd 遠心バ−レル研磨方法
US4716684A (en) * 1986-07-28 1988-01-05 Roach Larry A Cleaning and deburring of machined or cast parts
JP2000015553A (ja) * 1998-06-28 2000-01-18 Shuji Kawasaki バレル研磨装置
IT1304136B1 (it) * 1998-11-27 2001-03-07 Claudio Mingot Composizione, procedimento e apparecchiatura per la lucidatura dipezzi.
JP2004034258A (ja) * 2002-07-05 2004-02-05 Denso Corp 研磨装置

Also Published As

Publication number Publication date
DE602005014924D1 (de) 2009-07-30
CN1775475B (zh) 2012-01-11
CN1775475A (zh) 2006-05-24
ITMI20042203A1 (it) 2005-02-17
JP2006142475A (ja) 2006-06-08
JP5122739B2 (ja) 2013-01-16
EP1658931A1 (en) 2006-05-24

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