EP0244764A2 - Verfahren und Vorrichtung zum Zuführen einer Reinigungslösung mit suspendierten Schleifmaterialien in einer Werkstück-Endbearbeitungsmaschine - Google Patents

Verfahren und Vorrichtung zum Zuführen einer Reinigungslösung mit suspendierten Schleifmaterialien in einer Werkstück-Endbearbeitungsmaschine Download PDF

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Publication number
EP0244764A2
EP0244764A2 EP19870106288 EP87106288A EP0244764A2 EP 0244764 A2 EP0244764 A2 EP 0244764A2 EP 19870106288 EP19870106288 EP 19870106288 EP 87106288 A EP87106288 A EP 87106288A EP 0244764 A2 EP0244764 A2 EP 0244764A2
Authority
EP
European Patent Office
Prior art keywords
tank
recycling
detergent
finishing
cleaning solution
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
EP19870106288
Other languages
English (en)
French (fr)
Other versions
EP0244764B1 (de
EP0244764A3 (en
Inventor
Roberto Polenghi
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.)
POLENGHI, ROBERTO
Original Assignee
Individual
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 IT20309/86A external-priority patent/IT1189099B/it
Priority claimed from IT19816/87A external-priority patent/IT1202676B/it
Application filed by Individual filed Critical Individual
Priority to AT87106288T priority Critical patent/ATE91247T1/de
Publication of EP0244764A2 publication Critical patent/EP0244764A2/de
Publication of EP0244764A3 publication Critical patent/EP0244764A3/en
Application granted granted Critical
Publication of EP0244764B1 publication Critical patent/EP0244764B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
    • 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

  • This invention refers to a method and a device for feeding a cleaning solution with powdered abrasive substances, in suspension, into the finishing tank of work-piece finishing machines; such as tumblers, centrifugal and vibratory finishing machines and the like.
  • finishing and cleaning of metal or non-metal pieces is done with special finishing machines which include a finishing tank in which the pieces to be finished and the finishing materials are placed randomly.
  • the pieces to be treated and finishing materials undergo shaking and vibratory motions, in order to continuosly make the pieces to be finished and finishing materials rub against each other, in the presence of a cleaning solution.
  • the cleaning solution can be enriched with a powdered abrasive substance in order to improve on the action of the finishing materials.
  • the cleaning solution in the finishing tank of the machine is usually substituted with a fresh solution, while continuosly draining the dirty solution from the finishing tank, into a second tank, also known as recycling or decanting tank; from this tank the fresh solution is recycled in metered amounts into the finishing tank over the loose mass.
  • the necessity of feeding into the finishing tank a fresh solution has been considered an essential requirement to the smooth running of the machine and the finishing of the pieces to be treated.
  • Another problem with existing machines is the difficulty of dissolving the detergent in the cleaning solution and of dispersing the abrasive substance at the beginning of each machine cycle, due to the fact that these substances, upon contact with water, form lups which are hard to dissolve and can jam the recycling pump device.
  • the scope of this invention is to provide a method and a device through which the powdered abrasive substances can be suspended and maintened in that state in the cleaning solution which is fed into the finishing tank, by structurally simple and inexpensive means.
  • a further scope of the invention is to provide a method and a device as specified above, which will further dissolve the detergent and the powdered abrasive substance in a short time, at the beginning of each machine cycle, allowing in addition for the substances to be drawn from special containers.
  • the invention is based on a principle according to which creating turbulence within the cleaning solution in the recycling tank has no negative effects on the finishing of the pieces during a certain part of the finishing cycle, even if the solution that is recycled or fed into the finishing tank still contains part of the dirt previously removed, while it gives definitely better results in terms of the effectiveness of the finishing materials, since the turbulence in the recycling tank keeps suspended all the abrasive substance that would otherwise settle on the bottom of the tank.
  • Yet another scope of the invention is to provide an apparatus or device which can put into action the method being claimed, which is able to operate totally independently, in a short amount of time, using one or more detergents, while keeping the structure and operation of the machine extremely simple.
  • one tank is used to perform different functions since it is initially used as a recycling and/or detergent and powdered abrasive substance dispersion tank at the beginning and at least during one phase of the finishing machine cycle, while it can be used as a traditionsl recycling or dirt decanting tank, during the other phases of said machine cycle.
  • 10 stands for a generic finishing machine having a finishing tank 11 in which are placed the pieces 12 to be treated together with the finishing materials 13 in a loose fashion and a cleaning solution 14 which can contain a certain amount of suspended powdered abrasive substance.
  • the machine finishing tank 11 near the bottom, is provided with a discharge opening 17 for solution drainage, which is fitted with a grate that keeps in the pieces 12 and the finishing materials 13, while allowing the liquid solution to flow out with the eventual suspended abrasive powder.
  • the drainage opening 17 is in turn connected with a recycling tank 19, by a conduit 18 to drain the cleaning solution from the finishing tank 11 to the recycling tank 19.
  • Tank 19 as is shown, includes a slanted bottom 20, outer walls 21 and a partition 22 which extends downward, ending at a certain distance from the bottom 20 of the tank.
  • the partition 22 is usually below the surface of the liquid in tank 19 and is mainly used to divide area 23 from area 24.
  • Area 23 of tank 19 during certain phases of the machine cycle, and specifically at the beginning and during part of the cycle, is used to created turbulence within the solution towards the bottom 20 of tank 19 to suspend the abrasive powder dispersed in it, as will be explained later.
  • the second area 24 of the tank is used for the suction of the solution to be recycled into the finishing tank 11 of the machine 20.
  • Figure 1 shows that the bottom 20 of the recycling tank is slanted downward beginning at an area 23a, where the dirt is collected, towards the suction area 24, where a valve 25 allows for drainage into the sewers whenever the tank has to be emptied; 26 stands for an overflow conduit.
  • the tank 19 includes a stirring device of any kind, hydraluic or mechanical for istance, whose stirrer 28 is submerged completely in the liquid reaching almost to the bottom 20 of the tank so as to create a strong turbulence and a strong flow of liquid from the top towards the bottom 20 of the tank 19; a recycling pump 29 is used to feed the cleaning solution contained in the tank 19, into the finishing tank 11 through the conduit 31 respectively to feed the same solution along the recycling circuit 30 in order to pick up the cleaning solution, as explained later.
  • a stirring device of any kind, hydraluic or mechanical for istance whose stirrer 28 is submerged completely in the liquid reaching almost to the bottom 20 of the tank so as to create a strong turbulence and a strong flow of liquid from the top towards the bottom 20 of the tank 19
  • a recycling pump 29 is used to feed the cleaning solution contained in the tank 19, into the finishing tank 11 through the conduit 31 respectively to feed the same solution along the recycling circuit 30 in order to pick up the cleaning solution, as explained later.
  • the recycling tank 19 is fed with water from the main supply 32 through the conduit 33 and a valve 34 which can be activated by a float which detects the level of the liquid in the tank 19.
  • the finishing tank 11 can be fed by the main water supply 32 through the float valve 34 and a conduit 36.
  • the valve 34 has one or more nozzles 39 near the slanted bottom 20, the nozzles being directed downward towards the bottom 20 in order to allow for the proper washing of the bottom and of the abrasive material or the dirt deposited on it.
  • an essential feature of the method and of the device according to this invention is the creation of strong turbulence in the liquid or in the cleaning solution contained in the recycling tank 19, for example near the bottom 20 of the tank; in this way a turbulent circulation of the liquid is achieved thus lifting and keeping suspended the abrasive powder which has been previously dispersed into the solution, which would otherwise tend to settle on the bottom of the tank itself, thus augmenting the effectiveness of the machine 10.
  • the presence of the partition 22 also prevents the turbulent motion of the liquid from spreading in an uncontrolled mode to the area from which the pump 29 draws which could cause cavitation problems in the pump.
  • Turbulence of the cleaning solution in the tank 19 can be maintained for the time necessary for the treatment of the pieces 12 in the finishing tank; the fact that during this phase of the cycle the stirrer 28 prevents the decantation of solid particles of the cleaning solution, which drains out of the machine's finishing tank 11 and which are drained into the recyling tank 19, does not constitute a negative element, on the contrary, this turbulence is created on purpose and used to some advantage in lifting and keeping suspended the abrasive powder particles previously dispersed into the solution. The machine cycle time is thus greatly reduced due to the effectiveness of the solution 14 and of the finishing materials 13 upon the pieces 12 in the finishing tank 11.
  • the cleaning solution contained in tanks 11 and 19 is drained out by opening the drainage valve 25 and the float valve 34 at the same time thus conneting both the nozzles 39 and the conduit 36 with the main water supply 32 at the bottom 20 of the tank 19 and the mass of material 12, 13 in the finishing tank 11 are thus properly washed.
  • By closing up the drainage valve 25 the level of the liquid in the recycling tank 19 is restored which causes the float valve 34 to shut, starting up a new machine cycle.
  • the stirrer 28 in the recycling tank 19 facilitates the dissolving of the detergent and te dispersion of the abrasive powder from the very beginning of the cycle, at which point a new amount of detergent or cleaning substance and abrasive ponies is added to the water in the tank 19.
  • water could be made to flow through containers, each containing a given amount of detergent, and then feed the resulting solution into the finishing tank 11 of the machine, according to a sequence or machine cycle of choice.
  • a system has some significant limitations; the flow of liquid which is fed into the finishing tank 11 as a solution cannot be compatible with the requirements of the machine. In this way much of the detergent would not be picked up or dissolved in real time, or rather wouldn't dissolve at all since it would tend to lump or to form a thick residue which would remain in the containers for the detergent.
  • a method and a device have been provided, as described above, in which a strong flow of water or liquid, is drawn by the recycling pump 29 from the recycling tank 19, and most all of the flow is fed through a detergent container 41 so as to constantly flush against the detergent in said container, which is thus picked up in a short time, together with eventual abrasive powder, and carried to the recycling tank 19 where the turbulence caused by the stirrer 28 completely dissolves and disperses it. Only a small or metered quantity of the main flow used to dissolve the detergent is drawn form the conduit 30 and fed, through conduit 31, into the finishing tank 11 from which it will then go back to the recycling tank 19, as previously explained.
  • each detergent container 41 has its own recycling conduit 31 to the tank 19 with a respective pump 29 for the flow of the liquid into the detergent container 41, as previously explained. All of the above is achieved through a simple device set-up which is resistent to malfuncions that could arise from solid suspended particles in the cleaning solution which is recycled.
  • the device includes for each detergent to be dissolved, two distinct recycling circuits or paths, one of which draws the cleaning solution suspended in it, form the respective containers while the other recycles the cleaning solution, with the suspended abrasive powder, into the machine's finishing tank 11.
  • the first path 30 or main path is made up of an closed circuit and includes the solution suction area 24 of the tank 19, the pump 29 with the respective conduit 40, a container 41 for the detergent to be dissolved, and a discharge tube 42 which discharges the detergent in the container 41 directly into the tank 19 within the stirring area 23 which is defined by the partition 22 and a protection netting 43 which separates the stirring area proper, where the powdered abrasive substance is lifted up, and the area 23a where the eventual dirt floating on the solution is trapped.
  • the flow of solution pouring out of the conduit 42 preferably does not go directly into the tank 19, but rather over a flow quieting member 44 placed under the conduit, as shown.
  • the main circuit 30 is used to lift and dissolve the detergent in the container 41.
  • This circuit must therefore be sized to carry a large flow and in any case a volume of liquid greater than that necessary for the finishing tank 11 of the machine; in this way the drawing of the detergent from the respective container 41 and dissolving it are facilitated.
  • the conduit 31 used to recycle the liquid into the finishing tank 11 can be sized for the volume of flow needed solely by the machine 10 to work under the best conditions. In this way the detergent can be completely removed from the container 41 quickly and in a controlled mode, as a function of the speed and volume of the flow of liquid which is poured by the pump 29 into the container 41.
  • the container 41 for each main circuit 30 includes outer walls 45 and a bottom wall with a forward horizontal part 46 and a rear slanted part 47 over which opens the tube 40 feeding the liquid for dissoving the detergent, which conduit is part of the main recycling circuit.
  • the flow of water which is constantly recycled by the tube 40 is towards the slanted wall 47 at the bottom of the container, so as to cause the liquid to flow over the detergent 48 in the container 41 both on the top, the sides and the bottom.
  • the detergent 48 is held by a perforated plate, or restraining grate 49, slanted in the opposite direction of the bottom wall 47.
  • the grate 49 is provided with resting pacers 50 which separate it from the bottom 46 and is narrower that the container 41 in order to create a gap 51 for the solution to flow between the edges of the grate, the bottom and the side walls of the container 41. In this way the liquid flow tends to dig into the detergent both under and on the side of the lump of detergent, facilitating its dissolving and removal.
  • a spacer 52 separates the upper edge of the grate 49 from the lateral wall of the container, so as to create a sort of overflow which, due to the presence of appropriate holes in the plate, adjusts itself to the level of detergent which is left in the container.
  • the configuration of the detergent container or vat 41 and of the restraining grate 49 allows the detergent to dissolve rapidly due not only to the action of the liquid flow fed with augmented volume by the pump 29, but also to the creation of a surface flow which constantly flushes over the detergent 48 in the container.
  • the powdered abrasive substance which would otherwise settle on the bottom of the tank 19 is entrained into circulation, since the turbulence, caused by the stirrer 28, keeps the abrasive substance suspended in the cleaning solution, which then circulates throughtout with it.
  • the stirrer 28 can be actuated constantly, or it can be intermittently or off when the abrasive substance needs to be decanted, during a final or intermediate phase of the treatment cycle, in order to run a finishing or polishing phase with only the cleaning solution.
  • the cleaning solution and the dirt removed can be discharged; the pieces treated in the tank 11 can be washed with water alone, and at the same time the recycling tank 19 can be washed by the stream of water coming out of the float valve 34, which whashes off the bottom of the tank removing all the deposits.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
EP19870106288 1986-05-05 1987-04-30 Verfahren und Vorrichtung zum Zuführen einer Reinigungslösung mit suspendierten Schleifmaterialien in einer Werkstück-Endbearbeitungsmaschine Expired - Lifetime EP0244764B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87106288T ATE91247T1 (de) 1986-05-05 1987-04-30 Verfahren und vorrichtung zum zufuehren einer reinigungsloesung mit suspendierten schleifmaterialien in einer werkstueckendbearbeitungsmaschine.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT20309/86A IT1189099B (it) 1986-05-05 1986-05-05 Procedimento ed apparecchiatura per il riciclo di una soluzione detergente con sostanze abrasive in sospensione,in macchine per la levigatura e pulitura di pezzi e simili
IT2030986 1986-05-05
IT19816/87A IT1202676B (it) 1987-03-24 1987-03-24 Procedimento ed apparecchiatura per l'alimentazione di una soluzione detergente in macchine levigatrici e simili
IT1981687 1987-03-24

Publications (3)

Publication Number Publication Date
EP0244764A2 true EP0244764A2 (de) 1987-11-11
EP0244764A3 EP0244764A3 (en) 1989-09-27
EP0244764B1 EP0244764B1 (de) 1993-07-07

Family

ID=26327315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870106288 Expired - Lifetime EP0244764B1 (de) 1986-05-05 1987-04-30 Verfahren und Vorrichtung zum Zuführen einer Reinigungslösung mit suspendierten Schleifmaterialien in einer Werkstück-Endbearbeitungsmaschine

Country Status (2)

Country Link
EP (1) EP0244764B1 (de)
DE (1) DE3786417T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100401093B1 (ko) * 2001-02-26 2003-10-17 김용범 안경렌즈 연마수의 재생장치
KR100680653B1 (ko) 2005-09-23 2007-02-08 이종배 렌즈 연마수 재생장치
DE102012025233A1 (de) * 2012-12-28 2014-07-03 Otec Präzisionsfinish GmbH Verfahren und Vorrichtung zur Oberflächenbearbeitung von Werkstücken mittels Schleif- und/oder Poliergranulat in Gegenwart eines flüssigen Bearbeitungsmediums

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110125787B (zh) * 2019-04-28 2020-12-18 江苏大学 一种离心式纳米胶原体微内孔表面抛光装置及方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1167689B (de) * 1962-04-04 1964-04-09 Voigtlaender Ag Geraet zur Erzeugung feinbearbeiteter Flaechen an Werkstuecken
DE1427554A1 (de) * 1962-07-13 1968-12-12 Ajem Lab Inc Umwaelzvorrichtung fuer Sandstrahlanordnungen
US3883410A (en) * 1966-12-01 1975-05-13 Inoue K Method of and apparatus for the deburring workpieces

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100401093B1 (ko) * 2001-02-26 2003-10-17 김용범 안경렌즈 연마수의 재생장치
KR100680653B1 (ko) 2005-09-23 2007-02-08 이종배 렌즈 연마수 재생장치
DE102012025233A1 (de) * 2012-12-28 2014-07-03 Otec Präzisionsfinish GmbH Verfahren und Vorrichtung zur Oberflächenbearbeitung von Werkstücken mittels Schleif- und/oder Poliergranulat in Gegenwart eines flüssigen Bearbeitungsmediums
DE102012025233B4 (de) * 2012-12-28 2016-06-09 Otec Präzisionsfinish GmbH Schlepp- und/oder Tauchfinishmaschine zur Oberflächenbearbeitung von Werkstücken mittels Schleif- und/oder Poliergranulat in Gegenwart eines flüssigen Bearbeitungsmediums
US10040164B2 (en) 2012-12-28 2018-08-07 OTEC Prëzisionzfiniah GmbH Drag and/or dip finishing machine for the surface machining of workpieces by means of grinding and/or polishing granules in the presence of a liquid machining agent

Also Published As

Publication number Publication date
EP0244764B1 (de) 1993-07-07
DE3786417D1 (de) 1993-08-12
EP0244764A3 (en) 1989-09-27
DE3786417T2 (de) 1994-01-27

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