EP3795299A1 - Dispositif de polissage mécano-chimique et de procédé de polissage mécano-chimique - Google Patents

Dispositif de polissage mécano-chimique et de procédé de polissage mécano-chimique Download PDF

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Publication number
EP3795299A1
EP3795299A1 EP19198506.8A EP19198506A EP3795299A1 EP 3795299 A1 EP3795299 A1 EP 3795299A1 EP 19198506 A EP19198506 A EP 19198506A EP 3795299 A1 EP3795299 A1 EP 3795299A1
Authority
EP
European Patent Office
Prior art keywords
working container
grinding
cooling gas
heating
vibratory
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Withdrawn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
EP19198506.8A
Other languages
German (de)
English (en)
Inventor
Rainer Wälde
Bernd Pössel
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.)
Haug Intelligente Poliersysteme GmbH
Original Assignee
Haug Intelligente Poliersysteme GmbH
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 Haug Intelligente Poliersysteme GmbH filed Critical Haug Intelligente Poliersysteme GmbH
Priority to EP19198506.8A priority Critical patent/EP3795299A1/fr
Publication of EP3795299A1 publication Critical patent/EP3795299A1/fr
Withdrawn legal-status Critical Current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
    • B24B31/06—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
    • 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/007—Weight compensation; Temperature compensation; Vibration damping
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant

Definitions

  • the invention relates to an apparatus for vibratory grinding with the features of the preamble of claim 1 and a vibratory grinding method.
  • Vibratory grinding is a separating process for the surface treatment of workpieces with an abrasive medium that has abrasive bodies as bulk material or in a liquid, usually in water.
  • One or more workpieces are fastened or loosely inserted in a working container into which the loop medium is filled.
  • the working container is arranged so as to vibrate and is driven by a vibration exciter to vibrate, which causes a relative movement between the grinding bodies and the work piece (s), as a result of which surfaces of the work piece or pieces are machined with the grinding bodies.
  • the object of the invention is to improve vibratory finishing.
  • the device according to the invention has an oscillating, for example resiliently held, working container for receiving one or more Workpieces and a grinding medium.
  • that or the workpieces are fixed in the working container so that they move with the working container.
  • a loose insertion of the work piece (s) into the working container is not excluded.
  • a material to be ground, in particular a bulk material, whose parts, grains or particles form workpieces to be processed, can also be introduced into the working container.
  • the work container can be set in vibration, which creates a relative movement between the work piece (s) or the grinding material on the one hand and the grinding medium, in particular the grinding bodies, on the other hand, whereby the grinding bodies of the grinding medium on the surfaces of the work piece or pieces or parts, grains or particles rub the material to be sanded and work on the surfaces.
  • the parts, grains or particles of which form the workpieces whose surfaces are to be machined the parts, grains or particles that move relative to one another due to the vibration of the working container and thereby rub against one another can also be the grinding bodies be or form the grinding medium.
  • the device according to the invention has a heating device and / or a cooling device for heating and / or cooling an interior space or a content of the working container.
  • the heating device can be used to heat the work piece (s) or the material to be ground and the grinding medium during vibratory grinding, that is to say, vibratory grinding can take place at a higher temperature than ambient temperature.
  • a higher temperature during vibratory grinding can increase the effectiveness and shorten the processing time or improve the processing quality. This is particularly dependent on the work piece or pieces or the material to be ground and / or on the grinding medium.
  • shock-like cooling that is to say strong cooling
  • shock-like cooling during vibratory grinding can loosen particles and the like adhering to the surface of the work piece (s) and thereby increase the effectiveness of vibratory grinding, shorten the machining time and improve the machining quality.
  • the device can, for example, also have two vibration exciters with, in particular, different vibration planes, which vibrate at the same or different frequencies.
  • the oscillation frequencies can be set and possibly changed during vibratory grinding.
  • an inner wall of the working container and / or a bottom surface of the working container that delimits the interior of the working container can be heated over the whole or part of the surface with the heating device. This enables a large heating surface.
  • One embodiment of the invention provides a heating jacket which encloses the interior of the working container into which the work piece or pieces or the material to be ground and the grinding medium can be introduced.
  • the heating jacket has the inner wall of the working container or is in thermally conductive contact with the inner wall of the working container.
  • the heating device can for example have an electrical resistance heater.
  • One embodiment of the invention provides a heating device with a heating circuit with a gaseous or preferably liquid heat transfer medium, which enables a heat source outside the working container and also at a distance from the working container.
  • Water or thermal oils for example, can be used as liquid heat transfer media.
  • one embodiment of the invention provides full or partial thermal insulation of the working container.
  • the vibration exciters are preferably located outside the thermal insulation, so that they are thermally isolated from the heatable interior of the working container.
  • a cooling gas supply with which a cooling gas can be conducted into the working container.
  • "Cooling gas” is used here to denote any gas whose temperature is lower than the temperature of the contents of the working container.
  • carbon dioxide can be fed into the working container as a cooling gas.
  • a cold spray can also be conducted into the working container as a cooling gas.
  • a cold spray is a liquid gas that evaporates in the working container and thereby extracts heat from the contents of the working container.
  • the cooling gas can be fed into the working container several times during vibratory grinding.
  • the cooling gas supply can have one or more cooling gas nozzles and / or one or more cooling gas showers.
  • a cooling gas shower has a plurality of openings for the cooling gas to exit in a surface. It can, for example, be designed like a water shower.
  • one or more workpieces or a material to be ground and a grinding medium are heated during vibratory grinding to a temperature that is higher than an ambient temperature, for example to a temperature of 80 ° Celsius.
  • the temperature can be kept constant or changed during vibratory grinding.
  • a further development provides for the work piece (s) or the material to be ground and the grinding medium to be cooled in between, with a heating device not having to be switched off. Cooling is preferably only carried out briefly.
  • the apparatus 1 according to the invention for vibratory grinding shown in the drawing has a pot-shaped working container 2 which is arranged on a frame 4 with springs 3 so that it can vibrate.
  • the shape of the working container 2 is not mandatory for the invention; the working container 2 does not have to be pot-shaped.
  • One or more workpieces can be introduced into the working container 2.
  • the workpieces can be placed loosely in the working container 2 or fixed in the working container 2, for example on a base 6 of the working container 2. It is also possible to fill in a material to be ground in the form of a bulk material, the parts, grains or particles of which form the workpieces to be processed.
  • an abrasive medium with abrasive bodies is introduced into the working container 2.
  • the grinding medium can also be a bulk material with the grinding bodies as parts of the bulk material, or the grinding bodies are in a liquid, for example.
  • the parts, grains or particles of the material to be sanded that is to say the workpieces to be processed, can also form the abrasive bodies of the abrasive medium.
  • no grinding medium other than the grinding material needs to be introduced into the working container 2 of the device 1 according to the invention.
  • vibration exciters 5 are arranged on the working container 2, with which the working container 2 can be driven to vibrate.
  • the vibration exciters 5 have different and preferably adjustable vibration levels. Vibration frequencies of the two vibration exciters 5 can be set, it being possible for the vibration frequencies to be the same or different.
  • the grinding bodies of the grinding medium perform relative movements to the work piece (s) or the material to be sanded in the working container 2; If the material to be sanded is introduced into the working container 2 as bulk material without any other abrasive medium, the parts, grains or particles of the material to be sanded move relative to one another due to the vibrations of the working container, so that their surfaces rub against one another and are processed.
  • the work container 2 has a heating device 6 with a heating jacket 7, which is part of the work container 2 and which encloses an interior of the work container 2, in which the work piece or work pieces or the material to be ground and the grinding medium are located during vibratory grinding.
  • an inner wall of the heating jacket 7 also forms an inner wall of the working container 2.
  • the heating jacket 7 is double-walled, with an intermediate space between two walls of the heating jacket 7 forming a heating chamber which encloses the interior of the working container 2.
  • the heating chamber is connected to a heating unit 8 which, in the exemplary embodiment, is stationary, d. H. is not arranged swinging outside of the working container 2.
  • a gaseous or liquid heat transfer medium for example a thermal oil, is passed through the heating chamber and is heated in the heating unit 8.
  • the heating jacket 7 is enclosed with thermal insulation 9, which reduces heat loss.
  • the device 1 has a cooling gas line 10 with a cooling gas nozzle 11 as the cooling device 12, with which a cooling gas, for example Carbon dioxide, which is colder than the contents of the working container 2 and which preferably has a temperature of below 20 ° Celsius or below 10 ° Celsius, can be passed into the working container 2.
  • a cooling gas for example Carbon dioxide
  • Several cooling gas nozzles 11 can be present in order to be able to direct the cooling gas into the working container 2 at different points.
  • a cold spray for example, can also be used as the cooling gas.
  • the heating device 6 of the apparatus 1 according to the invention for vibratory grinding enables vibratory grinding at a higher temperature than ambient temperature, for example vibratory grinding at approximately 50 ° Celsius, 60 ° Celsius, 80 ° Celsius, 100 degrees Celsius or more.
  • the cooling device 12 it is possible to cool the work piece (s) or the material to be ground and the grinding medium during vibratory grinding.
  • the cooling device 12 also enables, for example, a short-term cooling of the heated work piece (s) or the material to be ground and the grinding medium during vibratory grinding.
  • metallic or non-metallic bulk materials can also be slide-grinded or at least machined.
  • One example is removing a so-called silver membrane from coffee beans.
  • the silver membrane is a thin membrane that encloses the coffee beans in a thick outer skin or shell.
  • the coffee beans are introduced into the working container 2 of the device 1 according to the invention and the working container 2 is driven to vibrate with the vibration exciter 5.
  • the heating device 6 the coffee beans are heated to a temperature of about 80 ° Celsius during the oscillating drive, as a result of which they are not roasted. When heated, the coffee beans enlarge, causing the silver membranes to burst.
  • the vibrations cause the coffee beans to rub against each other and remove the silver membranes from each other.
  • the removal of the silver skin from the coffee beans is accelerated by briefly several times in between a cooling gas is passed through the cooling gas nozzle 11 or several cooling gas nozzles at different points between the coffee beans and the coffee beans are cooled in a shock-like manner, that is to say in a short time.
  • the invention is not limited to the coffee beans selected in the exemplary embodiment; in principle, any bulk goods can be processed in the oscillatingly driven working container 2 with or without the addition of grinding tools and thereby heated, cooled or briefly cooled in a heated state.
EP19198506.8A 2019-09-20 2019-09-20 Dispositif de polissage mécano-chimique et de procédé de polissage mécano-chimique Withdrawn EP3795299A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19198506.8A EP3795299A1 (fr) 2019-09-20 2019-09-20 Dispositif de polissage mécano-chimique et de procédé de polissage mécano-chimique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19198506.8A EP3795299A1 (fr) 2019-09-20 2019-09-20 Dispositif de polissage mécano-chimique et de procédé de polissage mécano-chimique

Publications (1)

Publication Number Publication Date
EP3795299A1 true EP3795299A1 (fr) 2021-03-24

Family

ID=67998231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19198506.8A Withdrawn EP3795299A1 (fr) 2019-09-20 2019-09-20 Dispositif de polissage mécano-chimique et de procédé de polissage mécano-chimique

Country Status (1)

Country Link
EP (1) EP3795299A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523834A (en) * 1967-10-13 1970-08-11 Ibm Method of deburring
DE2554905A1 (de) * 1975-12-06 1977-10-06 Linde Ag Verfahren zum entgraten von formteilen
US4258507A (en) * 1979-08-29 1981-03-31 Majors Curtis O Fluid heated annular vibrating finishing apparatus
EP0186357A2 (fr) * 1984-12-21 1986-07-02 General Kinematics Corporation Tonneau de polissage
WO2011045285A1 (fr) * 2009-10-12 2011-04-21 Walther Trowal Gmbh & Co. Kg Procédé et dispositif de ponçage de pièces d'usinage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523834A (en) * 1967-10-13 1970-08-11 Ibm Method of deburring
DE2554905A1 (de) * 1975-12-06 1977-10-06 Linde Ag Verfahren zum entgraten von formteilen
US4258507A (en) * 1979-08-29 1981-03-31 Majors Curtis O Fluid heated annular vibrating finishing apparatus
EP0186357A2 (fr) * 1984-12-21 1986-07-02 General Kinematics Corporation Tonneau de polissage
WO2011045285A1 (fr) * 2009-10-12 2011-04-21 Walther Trowal Gmbh & Co. Kg Procédé et dispositif de ponçage de pièces d'usinage

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