EP2991803A1 - Procédé de brossage d'au moins un élément tubulaire métallique, et dispositif de brossage adapté - Google Patents

Procédé de brossage d'au moins un élément tubulaire métallique, et dispositif de brossage adapté

Info

Publication number
EP2991803A1
EP2991803A1 EP13729411.2A EP13729411A EP2991803A1 EP 2991803 A1 EP2991803 A1 EP 2991803A1 EP 13729411 A EP13729411 A EP 13729411A EP 2991803 A1 EP2991803 A1 EP 2991803A1
Authority
EP
European Patent Office
Prior art keywords
tubular member
metal tubular
metal
brushing
fluid
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.)
Withdrawn
Application number
EP13729411.2A
Other languages
German (de)
English (en)
Inventor
Umberto BIANCHI
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.)
Martinenghi Srl
Original Assignee
Martinenghi Srl
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 Martinenghi Srl filed Critical Martinenghi Srl
Publication of EP2991803A1 publication Critical patent/EP2991803A1/fr
Withdrawn legal-status Critical Current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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
    • 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
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
    • B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents

Definitions

  • the present invention relates to a method for brushing at least one metal tubular member, particularly made of aluminium or alloys thereof, and a relevant brushing device.
  • metal tubular members comprising, for example, cylindrical metal containers such as tubes, cans or cylinders, usually made of aluminium and used to contain fluid (for example gaseous) or semi-fluid products (such as pastes), are obtained by a cold extrusion process followed by an operation of brushing the outer surface thereof.
  • fluid for example gaseous
  • semi-fluid products such as pastes
  • this brushing operation serves a dual purpose: obtaining a pleasing aesthetic effect on the external surface and improving the adhesion of a subsequent layer of lacquer applied to the outer surface of the metal tubular member.
  • the technology for the manufacture of these thin- walled cylinders or cans usually involves using sheet plates made of a suitable aluminium (or other metal) alloy, which are deformed by deep-drawing and drawing to obtain the desired size.
  • the deep-drawing and drawing process is performed in a cooling and/or lubricating environment normally obtained by contacting a water-oil emulsion with the material to be deep-drawn and drawn, the water/oil ratio being variable.
  • the tubular member obtained by the forming process is wet with the cooling and lubricating fluid.
  • the traditional brushing process resulting in a considerable generation of aluminium (or other metal) powders with a fine particle size has eventually shown to be inadequate because a metal surface wet with a water - mineral oil emulsion does not generate a powder but a sludge of aluminium (or other metal).
  • the sludge is formed in significant amounts, thereby not allowing the brushing device to operate more than a few hours. In fact, the sludge quickly dirties the mechanical elements and penetrates the components of the device, resulting in the jamming thereof. Even when the water - mineral oil emulsion existing on the outer surface of the metal cylinder or can is intended to be removed before carrying out the brushing operation, the brushing device should be provided with a drying oven, and possibly with a pre-washing station, upstream of the brushing device. This would lead to a significant increase in complexity of both the brushing device and the method for the production of traditional metal cylinders or cans, as well as to an increase in energy consumption and overall bulk of the system for the production of these metal tubular containers.
  • an aim of the present invention is to implement a method and a relevant device for brushing a metal tubular member in an effective, technically simple manner and with a reduced consumption of resources.
  • an aim of the present invention is to implement a method for brushing a metal tubular member, preferably obtained in a cooling and/or lubricating environment, for example by deep-drawing and drawing or by other similar method, in a technically effective manner while preventing the brushing device used from getting jammed.
  • a further aim of the present invention is to implement a brushing device which is structurally simple and reduced in overall dimensions.
  • the present method for brushing at least one metal tubular member comprising the step of a) abrading the outer surface of said at least one metal tubular member and, simultaneously, the step of b) removing the metal powders produced during said step a) of the method, characterized in that said ste b) comprises the step of c) delivering a flow of atomized fluid at least in correspondence to the outer surface of said at least one metal tubular member in order to at least temporarily keep suspended, in said flow of atomized fluid, the metal powders produced during said step a) of the method.
  • the outer surface of the tubular member is sprayed with a flow of atomized fluid, i.e. finely dispersed droplets of said fluid, preferably but not limited to water or water in admixture with certain additives such as mechanical processing-grade oils, mineral oils, mineral oil-based emulsions or other additives commonly known as "cooling agents" (or “coolants”), thereby at least temporarily keeping suspended, in said flow of atomized fluid, the powders produced during the step of a) abrading the outer surface of said at least one tubular member.
  • a flow of atomized fluid i.e. finely dispersed droplets of said fluid, preferably but not limited to water or water in admixture with certain additives such as mechanical processing-grade oils, mineral oils, mineral oil-based emulsions or other additives commonly known as "cooling agents" (or “coolants”)
  • the Applicant has found that the ultra-fine metal powders resulting from brushing the surface of the metal tubular member are entrapped within the finely dispersed droplets of atomized fluid directed towards the surface of the tubular member.
  • the metal powder particles particularly made of aluminium or an alloy thereof, from the brushing area, i.e. from near the metal tubular member being processed.
  • step d) moving away and/or removing the metal powders kept suspended in said flow of atomized fluid from said metal tubular member.
  • step d) moving away and/or removing the metal powders kept suspended in said flow of atomized fluid from said metal tubular member.
  • step d there is provided the step of e) collecting said atomized fluid and said metal powders kept suspended in said atomized fluid in at least one collection tank. Furthermore, subsequent to said step e), there are provided the step of f) filtering the fluid collected in said at least one collection tank, and the step of g) atomizing said filtered fluid in order to use it in said step c) of the method.
  • said step a) is preceded by the step of forming said at least one metal tubular member in a lubricating and/or cooling environment.
  • said step of forming said at least one metal tubular member is performed by deep- drawing and/or drawing.
  • a lubricating and/or cooling environment such as a water - mineral oil emulsion.
  • the entire brushing method is carried out in a wet or moist environment, thereby not requiring the metal tubular member to be washed and dried after the production thereof in a lubricating and/or cooling environment of the previous step, as would be necessary with the known brushing methods.
  • This avoids the need of suitably oven-drying the metal tubular members formed by deep-drawing and drawing before subjecting them to brushing.
  • the metal powders are kept suspended in said atomized fluid and then discharged therewith, thus preventing them from forming a sludge which is difficult to be disposed of.
  • said flow of atomized water is directed substantially towards the outer surface of the metal tubular member.
  • delivery is preferably carried out from an upper position to a lower position with respect to said at least one metal tubular member.
  • a device for brushing at least one metal tubular member having means for abrading the outer surface of said at least one metal tubular member and means for removing the metal powder produced by said abrading means, characterized in that said removing means comprise as well means for delivering a flow of atomized fluid at least in correspondence to said outer surface of said at least one metal tubular member in order to at least temporarily keep suspended, in said flow of atomized fluid, the powders produced by said abrading means.
  • said means for delivering the flow of atomized fluid, particularly atomized water comprise one or more nozzles, and said at least one brushing device is provided with means for atomizing said fluid which can be connected to said one or more nozzles.
  • said at least one brushing device comprises at least one tank for collecting the atomized fluid and the powders kept suspended in said flow of atomized fluid; said at least one tank is arranged below said at least one metal tubular member.
  • said at least one collection tank comprises one or more filters for filtering the fluid collected in said at least one collection tank, and means for fluidically connecting said at least one tank with said atomizing device. This can allow the atomized fluid initially directed towards the external surface of said metal tubular member to be reused.
  • said abrading means comprise at least one rod conveyor for dragging said at least one metal tubular member through said at least one device, at least one friction belt for rotating said at least one metal tubular member, and at least one abrasive belt for brushing the outer surface of said at least one metal tubular member, wherein said at least one friction belt and said at least one abrasive belt are respectively arranged below and above said at least one metal tubular member, or vice versa, at least when said at least one metal tubular member is dragged through said brushing device by said at least one rod conveyor.
  • the device also comprises means for varying the distance and/or angle between said at least one abrasive belt and said at least one metal tubular member.
  • a system for the production of at least one metal tubular member comprising at least one forming device for forming said at least one metal tubular member, at least one device according to one or more of claims 10 to 15 for brushing said at least one metal tubular member, and means for transferring said at least one metal tubular member from said at least one forming device to said at least one brushing device.
  • said at least one forming device comprises at least one deep-drawing and/or drawing device or otherwise a forming device operating in a lubricating and/or cooling environment.
  • figure 1 is a schematic side view of the device for brushing at least one metal tubular member according to the invention
  • figure 2 is a schematic side view of the system for forming at least one metal tubular member according to the invention
  • figure 3 is a perspective view of a metal tubular member.
  • a brushing device according to the invention is referred to by reference numeral 1.
  • each metal cylinder 100 is produced in a lubricating and cooling environment, its outer surface 100a is wet with a water - mineral oil emulsion.
  • lubricating and/or cooling environment is hereinafter intended to mean a water - mineral oil emulsion, however, the scope of protection of the present invention also includes a lubricating and/or cooling environment obtained with another type of emulsion and/or mixture of one or more components, or generally with any fluid suitable for such purposes.
  • Such a brushing device 1 comprises means 2 for abrading the outer surface 100a of a general metal cylinder 100 made of aluminium or an alloy thereof, and means 3 for removing the metal powder produced by said abrading means 2 when the outer surface 100a of the above metal cylinder 100 is being brushed.
  • the removing means 2 also comprise means 4 for delivering a flow of atomized fluid to the outer surface 100a of the cylinder 100 made of aluminium or an aluminium alloy in order to at least temporarily keep suspended the powders produced by said abrading means 2 in said flow of atomized fluid, thereby causing the powders to be moved away from the outer surface of the metal cylinder 100.
  • such a fluid is water and, therefore, the flow of atomized fluid comprises atomized water.
  • said fluid can also be water in admixture with additives such as a general volatile lubricant, oils, soaps, waxes or the like as known in the art, without departing from the scope of protection of the present invention.
  • said means 4 for delivering the flow of atomized water comprise a plurality of nozzles which are fluidically connected to appropriate means 6 for atomizing water.
  • atomizing means 6, which are incorporated in the brushing device 1 are well known in the art and therefore not further described in detail.
  • the nozzles 4 are arranged above the metal cylinder 100 to be brushed, and the flow of atomized fluid is directed downwards so as to follow a substantially vertical path. Practically, the abrasion area is continuously sprayed with such a fluid through said nozzles 4, which act to keep clean the processing area by at least temporarily keeping suspended the powder resulting from the abrasion of the outer surface 100a of the metal cylinder 100 in the atomized fluid itself, and then removing it from the cylinder.
  • the brushing device 1 comprises a tank 7 for collecting the atomized fluid and the powders kept suspended in said flow of atomized fluid.
  • a tank 7 is advantageously arranged below the metal cylinder 100 so as to easily collect the atomized water loaded with the metal particles of ultra- fine powder resulting from the abrasion of the outer surface 100a of the metal cylinder 100 by said abrading means 2.
  • the collection tank 7 comprises a filter 25 for filtering the fluid collected in the collection tank 7, and means 8 for fluidically connecting the tank 7 and the atomizing means 6 to each other.
  • the working fluid can be continuously recovered while the cylinder 100 is being brushed, thus avoiding an undue consumption of fluid and energy.
  • the nozzles 4 are connected to the atomizing means 6 through an appropriate fluid connection line 15.
  • said abrading means 2 comprise a rod conveyor 10 for dragging the metal tubular member (cylinder) 100 to be brushed through the brushing device 1, two friction belts 11 for rotating the metal cylinder 100 while it is conveyed by the above mentioned conveyor 10, and two abrasive belts 12 for brushing the outer surface 100a of the metal cylinder 100.
  • the two friction belts 11 and the two abrasive belts 12 are preferably arranged below and above the metal cylinder 100, respectively, at least when the cylinder 100 is dragged through the brushing device 1 by said rod conveyor 10.
  • a brushing device 1 is shown herein in which the friction belts 11 are arranged in a lower position and the abrasive belts 12 are arranged in an upper position, however, it is understood that any other mutual arrangement can be possible, for example, an arrangement in which the abrasive belts are in a lower position and the friction belts are in an upper position, without departing from the spirit of the present invention.
  • the numbers of friction belts 11 and abrasive belts 12 can be varied as a function of the processing speed to be achieved in order to perform the brushing operation within a reasonable time.
  • the hardness of the used material i.e. aluminium, aluminium alloys or the like, requires a rather long processing time in order to obtain an appropriate brushing quality, so that the device may need to be equipped with multiple successive stations, i.e. with multiple pairs of friction belts and abrasive belts arranged sequentially next to each other.
  • a brushing device 1 either equipped with one friction belt 11 and one abrasive belt 12 or else equipped with more than two friction and abrasive belts, i.e.
  • the device 1 comprises means (not shown herein) for varying the distance and/or angle between the abrasive belt 12 and said metal tubular member (cylinder) 100. In this way, it is possible to adjust the position of the abrasive belt 12 in order to allow the machine to be used for the production of containers having different diameters. Additionally, this adjustment allows the brushing pressure to be set, thereby affecting the aesthetic effect that is desired for a specific product.
  • FIG. 2 there is also shown a system 20 for the production of a metal tubular member 100, which comprises a device 21 for forming said metal tubular member 100 in a lubricating and/or cooling environment, a device 1 of the type described above for brushing said metal tubular member 100, or in any case a brushing device as claimed in one or more of claims 10 to 15, and means 22 for transferring said metal tubular member 100 from said forming device 21 to said brushing device 1.
  • the forming device 21 comprises a deep-drawing and/or drawing device which is only schematically depicted herein, as it is well known in the art of production of metal cylinders or metal tubular members.
  • the forming device 21 may also be of a known type, i.e. provided with cold-extrusion means and therefore operating in a dry environment, without departing from the scope of protection of the present invention.
  • the method for brushing a metal tubular member 100 preferably made of aluminium or an alloy thereof and produced, for example, in a lubricating and/or cooling environment comprises the step of a) abrading the outer surface 100a of the metal tubular member 100 and, simultaneously, the step of b) removing the metal powders produced during said step a) of the method.
  • said step b) comprises the step of c) delivering a flow of atomized fluid, particularly atomized water, to the outer surface 100a of the metal tubular member 100 in order to keep suspended the metal powders produced during said step a) of the method in said flow of atomized fluid.
  • said step a) is preferably preceded by the step of forming said metal tubular member 100 by deep-drawing and/or drawing although, alternatively, it may be preceded by a step of forming the metal tubular member 100 by extrusion.
  • step c) of the method there is provided the step of d) moving away and/or removing the metal powders kept suspended in said flow of atomized fluid from said metal tubular member 100.
  • said step d) comprises the step of e) collecting said atomized fluid and said metal powders kept suspended in said atomized fluid in a collection tank 7. Subsequent to said step e), there are provided the step of f) filtering the fluid collected in said collection tank 7, and the step of g) atomizing said filtered fluid in order to reuse it in said step c) of the method.
  • said flow of atomized fluid is substantially directed towards said at least one metal tubular member 100 and particularly, according to a preferred embodiment of the invention, from an upper position to a lower position with respect to the metal tubular member 100. Therefore, the collection tank 7 is arranged below the metal tubular member 100 in order to collect the flow of atomized fluid which has been delivered to the outer surface 100a of the metal tubular member 100.
  • said lubricating and/or cooling environment comprises a water and/or mineral oil emulsion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning In General (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

La présente invention concerne un procédé de brossage d'au moins un élément tubulaire métallique (100), qui comprend l'étape qui consiste à a) abraser la surface extérieure dudit élément tubulaire métallique et, simultanément, l'étape qui consiste à b) éliminer les poudres de métal produites pendant ladite étape a) du procédé, ledit procédé étant caractérisé en ce que ladite étape b) comprend l'étape qui consiste à c) fournir un flux de fluide atomisé au moins en correspondance avec la surface extérieure (100a) dudit élément tubulaire métallique (100) afin de maintenir au moins provisoirement en suspension, dans ledit flux de fluide atomisé, les poudres de métal produites pendant ladite étape a) du procédé.
EP13729411.2A 2013-05-02 2013-05-02 Procédé de brossage d'au moins un élément tubulaire métallique, et dispositif de brossage adapté Withdrawn EP2991803A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2013/000823 WO2014177898A1 (fr) 2013-05-02 2013-05-02 Procédé de brossage d'au moins un élément tubulaire métallique, et dispositif de brossage adapté

Publications (1)

Publication Number Publication Date
EP2991803A1 true EP2991803A1 (fr) 2016-03-09

Family

ID=48628733

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13729411.2A Withdrawn EP2991803A1 (fr) 2013-05-02 2013-05-02 Procédé de brossage d'au moins un élément tubulaire métallique, et dispositif de brossage adapté

Country Status (3)

Country Link
EP (1) EP2991803A1 (fr)
CN (1) CN105408061A (fr)
WO (1) WO2014177898A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115229653B (zh) * 2022-08-03 2023-07-14 浙江工业大学 一种单晶光纤高效抛光装置及方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3104826A (en) * 1963-09-24 morris
CN1124472A (zh) * 1993-05-26 1996-06-12 美国3M公司 在加工件上形成光滑表面的方法
US6165053A (en) * 1996-07-24 2000-12-26 Mayekawa Mfg. Co., Ltd. Method and apparatus for processing in cold air blast
US6220946B1 (en) * 1998-02-13 2001-04-24 Philip D. Arnold Active polishing of rotatable article surfaces
US6612314B2 (en) * 2001-06-29 2003-09-02 Jack R. Bratten Process for removing oil containing machining fluid from machined chips
DE102011009551A1 (de) * 2011-01-19 2012-07-19 C. & E. Fein Gmbh Rohrschleifmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2014177898A1 *

Also Published As

Publication number Publication date
WO2014177898A1 (fr) 2014-11-06
CN105408061A (zh) 2016-03-16
WO2014177898A8 (fr) 2015-12-23

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