WO2021122736A1 - Procédé et dispositif pour le traitement de la surface de pièces - Google Patents

Procédé et dispositif pour le traitement de la surface de pièces Download PDF

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Publication number
WO2021122736A1
WO2021122736A1 PCT/EP2020/086407 EP2020086407W WO2021122736A1 WO 2021122736 A1 WO2021122736 A1 WO 2021122736A1 EP 2020086407 W EP2020086407 W EP 2020086407W WO 2021122736 A1 WO2021122736 A1 WO 2021122736A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
workpiece
grinding
polishing
granulate
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.)
Ceased
Application number
PCT/EP2020/086407
Other languages
German (de)
English (en)
Inventor
Florian Reinle
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.)
Otec Praezisionsfinish GmbH
Original Assignee
Otec Praezisionsfinish 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 Otec Praezisionsfinish GmbH filed Critical Otec Praezisionsfinish GmbH
Publication of WO2021122736A1 publication Critical patent/WO2021122736A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B24B31/003—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
    • B24B31/02—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 rotary barrels
    • B24B31/0224—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 rotary barrels the workpieces being fitted on a support
    • 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
    • B24B31/02—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 rotary barrels
    • B24B31/03—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 rotary barrels the workpieces being continuously-travelling
    • 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

Definitions

  • the invention relates to a method for surface treatment of workpieces by immersing the workpiece in a bed of grinding and / or polishing granules located in a container and moving it in the bed of grinding and / or polishing granules relative to the latter.
  • the invention also relates to a particularly suitable device for performing such a method for surface treatment of work pieces by immersing the workpiece in a bed of a grinding and / or polishing granulate with relative movement of the same in relation to the workpiece, with a container for Receiving the grinding and / or polishing granulate and with at least one workpiece holder on which the workpiece to be processed can be releasably fixed.
  • drag finishing machines For the surface treatment of workpieces by dipping the workpiece into a bed of grinding and / or polishing granulate located in a container and moving it in the bed of the grinding and / or polishing granulate relative to this, so-called drag finishing machines are used in particular, which represent chleifmaschinen a spe cial form of sliding S, Chen at wel individually workpieces to be processed, for example, or on one or more clamping devices of a Werk Swisshal ters of the machine are detachably fixed to them as a result of relative movement with respect to the bed of a grinding and / or to grind or polish polishing granulate.
  • Drag finishing machines often include a generally rotating part, essentially in the form of a plate that is rotatably driven, for example, by a motor via a suitable gear, on which the workpiece holders are fixed directly or indirectly, for example via lifting devices. This ge happens in particular eccentrically with respect to the axis of rotation of the rotating part of the drag finishing machine.
  • the workpiece holders attached to it describe a trajectory.
  • the workpieces carried by the clamping devices of the workpiece holder are immersed in the working container, which is filled with the bulk of the particulate grinding or polishing granulate, often with the addition of liquid processing media such as water, surfactants, etc., whereby the relative movement of the Workpieces in relation to the granulate whose surface processing takes place in the form of vibratory grinding.
  • Such drag finishing machines are known, for example, from DE 10204 267 CI, DE 20005 361 Ul or DE 10 2010 052 222 Al.
  • the container holding the grinding and / or polishing granulate can be moved relative to the workpieces that are also moving, for example at least rotated around their own axis, or also stationary workpieces, such as around its own axis and / or along a trajectory, e.g. in the form of a circular path. If only the container is moved and the workpieces themselves do not perform any translational movement, this is also referred to as "plunge grinding” or "plunge polishing” as a special form of drag finish.
  • Chen processing is essentially stationary clamping device is essentially stationary, also referred to as immersion finishing machines NEN.
  • the grinding or polishing granulate can be of different nature and, for example, of natural origin (e.g. made of organic material such as walnut or coconut shells, wood, cherry stone etc.), mineral origin (e.g. made of silica, oxides etc.) and / or of synthetic origin (e.g. made of plastics).
  • natural origin e.g. made of organic material such as walnut or coconut shells, wood, cherry stone etc.
  • mineral origin e.g. made of silica, oxides etc.
  • synthetic origin e.g. made of plastics.
  • it is possible - as already indicated - to carry out the vibratory finishing process dry or - with the addition of a liquid processing medium such as water, which can be mixed with additives such as surfactants - in the form of wet processing.
  • the Workpiece holders of known drag finishing machines are often rotationally driven, which can be done, for example, by means of suitable motors (see, for example, DE 102010 052 222 A1).
  • workpiece holders for Schleppfinishma machines are known whose clamping devices for releasable fastening of the workpieces are rotatably mounted and can be set in rotation via a shaft rotatably mounted in the workpiece holder.
  • the workpiece holder has, for example, a planetary gear with a central sun gear, which engages with planetary gears, which in turn is rotatably connected to a support shaft of a respective Spannver circuit, which are arranged distributed around the circumference of the sun wheel of the workpiece holder.
  • the processing medium achieves a uniform processing quality with shorter processing times compared to a purely translational movement.
  • the workpiece holder itself can alternatively or additionally be fixed rotatably in a corresponding manner on the support part of the drag finishing machine (cf., for example, DE 202009 008 070 U1).
  • the area of application of such drag and / or immersion fi nish machines includes not only the surface treatment of mass-produced articles, but also the treatment of precision parts with a relatively complex geometry, the surface quality of which is subject to very high requirements and which, in particular, have to meet very low tolerances.
  • Medical prostheses, optical lenses or mechanical precision components for the mechanical engineering industry are only mentioned as examples. This requires the adherence to very narrow process parameters for surface processing and, in particular, a very high level of reproducibility in order to ensure that the workpieces are provided with the individually desired surface properties in a more or less identical manner.
  • the relative speed between the workpiece and the granulate particles which can usually be adjusted by means of suitable control drives of the container and / or the workpiece holder, play a role in this context.
  • processing time which can also be preset as a rule, as well as the immersion depth of the workpiece in the Schüt device of grinding and / or polishing granulate play a role, with the abrasive effect of the granulate particles on the due to the increasing immersion depth "hydraulic" pressure of the granulate particles
  • Workpiece increases with increasing immersion depth of the same in the granulate bed (cf., for example, EP 2572 829 B1 or DE 102009 021 824 A1).
  • the invention is based on the object of developing a method and a device for surface processing of work pieces of the type mentioned at least largely avoiding the aforementioned disadvantages in a simple and inexpensive manner to the effect that the effectiveness of the surface processing of the workpieces is improved and thus in particular shorter Processing times can be achieved.
  • this object is achieved according to the invention in a method for surface processing of workpieces of the type mentioned at the outset in that the grinding and / or polishing granulate is pressed against the workpiece during the surface processing of the workpiece, in that the for receiving the grinding and / or polishing granulate available receiving volume of the container is compressed.
  • the invention also provides for solving this problem in a device for surface machining of workpieces of the type mentioned at the outset that it has at least one pressure generating device designed to compress the volume of the container available for receiving the grinding and / or polishing granules has to press the grinding and / or polishing granules against the workpiece during its surface treatment.
  • the method according to the invention consequently provides - in addition to pressing the particles of the grinding and / or polishing granulate against the workpiece to be processed due to the dead weight of the grinding and / or polishing granules and possibly purely due to centrifugal forces - before mechanically pressing the particles of the grinding and / or polishing granules against the workpiece during the surface processing of the workpiece by using the and / or polishing granules available receiving volume of the container is compressed.
  • the efficiency of surface machining can be increased significantly and the cycle times required for surface machining can be reduced accordingly.
  • the invention due to the mechanical pressing of the grinding and / or polishing granulate against the workpiece surface, in particular also opens up the possibility of in In the event of at least a proportion of more or min of the spherical particles of the grinding and / or polishing granules in the bed, to ensure a surface treatment similar to rolling, by rolling the essentially round particles of the grinding and / or polishing granules along the workpiece surface and this smooths them.
  • the strength of the workpiece can also be increased, whereby high and comparatively low internal compressive stresses can be generated, depending on whether the grinding and / or polishing granulate is depending on its type and grain shape and / or depending on its pressure against the workpiece being machined h causes a vibratory grinding process and / or a rolling process of the workpiece.
  • the method according to the invention can in any case only be determined by the method parameters of the relative speed of the workpiece in relation to the grinding and / or polishing Granulate and the pressure of the grinding and / or polishing granulate against the workpiece surface control and / or regulate, the depth of immersion of the workpiece in the Schüt device practically no longer plays a role and is negligible.
  • the device according to the invention for surface processing of workpieces is equipped with a pressure generating device, which is used to compress the volume of the container and available for receiving the grinding and / or polishing granules -
  • a pressure generating device which is used to compress the volume of the container and available for receiving the grinding and / or polishing granules -
  • - is expediently designed to generate a variable pressure of the grinding and / or polishing granules against the workpiece surface and enables any known grinding and / or polishing particles to be used.
  • the compression of the stationary for receiving the grinding and / or polishing granules available recording can be done volume of the container in principle in any manner, for example by means of a displaceable relative to the container lid, which with a desired, expensive-before preferably S and / or controllable , Pressure from above against the grinding and / or polishing granulate received in the container can be pressed, according to an advantageous embodiment of the method according to the invention it can be provided that at least one expansion element is arranged in the container and the expansion element is expanded, in order to compress the volume of the container available for receiving the grinding and / or polishing granules and in this way to press the grinding and / or polishing granules against the workpiece.
  • the pressure generating device has at least one expansion element arranged in the container, which can be expanded to compress the volume of the container available for receiving the grinding and / or polishing granules.
  • an, for example elastic, flexible expansion element with at least one expansion chamber is used, where a pressure fluid, in particular a pressure fluid, is applied to the expansion chamber in order to expand the expansion element .
  • a pressure fluid in particular a pressure fluid
  • the expansion element is made of, for example, an elastic, flexible material and has at least one expansion chamber which can be acted upon with a pressure fluid, in particular with a pressure fluid to expand the expansion element.
  • the flexible expansion element can, for example, be primarily made of elastomeric plastics, such as those based on rubber, silicone, thermoplastic or thermoset polyurethane nelastomers and the like, to which essentially particulate and / or fibrous reinforcing materials can advantageously be added to increase the abrasion resistance.
  • the expansion element can either have one or more, communicating or in particular special expansion chambers that can be acted upon separately by the pressure fluid, depending on the geometry of the workpiece to be machined and depending on its desired Surface quality to compress the volume of the container available for receiving the bed from the grinding and / or polishing granules essentially symmetrically, e.g.
  • the pressure fluid used can, for example, be a gas or preferably a liquid, such as water, hydraulic oil or the like.
  • the pressure fluid can, if necessary, be cooled and in particular essentially continuously through the at least one expansion chamber of the flexible expansion chamber. Element are passed through, so that it can also serve as a cooling medium for the heat generated during the surface treatment as a result of the frictional contact of the grinding and / or polishing granules with the surface of the expansion element.
  • the expansion element is arranged on at least one inside section of a wall, e.g. on the circumferential wall, or essentially over its entire circumference on the inner circumferential wall, of the container, for example according to Art
  • an inner wall made of a, for example elastic, flexible material can be configured so that its expansion chamber (s) is or are formed between the inside section of the wall of the container and the flexible inner wall of the expansion element; or the, for example elastic, resilient expansion element can for its part be double-walled and provided with one or more expansion chamber (s) and applied to at least one inner section of the wall of the container.
  • At least one expansion chamber is expediently connected to at least one pressure fluid connection arranged on the outside of the container in order to apply the pressure fluid to it, if necessary, and to expand it by the desired amount.
  • a separate expansion element ie not connected to at least one wall section of the container, can be inserted into the container, such an expansion element in particular having a carrier, e.g. in the manner of a more or less rigid cage can be, which includes at least one pressure chamber sender, resilient material and, if necessary, gives it the necessary dimensional stability.
  • the respectively desired pressure of the grinding and / or polishing granules against the workpiece is controlled and / or regulated so that the pressure of the grinding and / or polishing granules against the
  • the workpiece is not only variable, but also, for example, different surface processing cycles can be carried out with different contact pressures of the grinding and / or polishing granulate against the workpiece surface, such as an initial rough grinding with (very) high contact pressure, followed by fine grinding with a lower one Contact pressure and a final polishing with (very) low contact pressure, etc., with the invention of course also enables a practically pressureless surface processing of the workpieces according to the prior art, for example by the compression of the grinding and / or polishing granulate for Ver Addition standing receiving volume of the container serving expansion element is not expanded.
  • the contact pressure of the grinding and / or polishing granules against the workpiece e.g. essentially sinusoidal, sawtooth or otherwise, is changed in periodic cycles during its surface processing - be it between two or more different Druckni levels or be it between one or more pressure levels compared to a by means of the pressure generating device he testified contact pressure of about zero -.
  • the several expansion chambers of the one or several expansion elements can be pressurized and relieved of pressure in the case of an alternating pressurization of their expansion chambers, both essentially synchronously and in succession.
  • the available range of possible combinations of different expansion chambers, different controls and different pressures lead to very broad and comprehensive processing conditions, which can be set individually depending on the material of the workpiece and its desired surface finish.
  • the pressure generating device can be controlled and / or regulated so that it is designed in particular to carry out the method variants described above.
  • the pressure generating device comprises an, for example elastic, flexible expansion element with at least one pressure chamber, in particular at least one pressure control and / or regulating device, for example in the form of a pressure control and / or regulating valve, a pressure control and / or controllable pump or the like, which is designed to control and / or regulate the pressure of the pressure fluid, with which the at least one expansion chamber of the expansion element made of a flexible material can be acted upon.
  • Different surface processing profiles can of course be storable in a manner known as such in an electronic control and / or regulating device of the device in order to call them up as required.
  • the container is essentially completely filled with the grinding and / or polishing granulate and the workpiece is immersed in the bulk of the grinding and / or polishing granulate located in the container, after which the container, insbesonde re by means of a lid, is closed and the grinding and / or polishing granulate is pressed against the workpiece becomes.
  • the cover prevents the grinding and / or polishing granules from being displaced during the compression of the receptacle volume as a result of expansion of the expansion element, so that a more or less linear relationship between the pressure of the pressure fluid with which the expansion chamber (n ) of the Expansionsele Mentes is or are acted upon, and the contact pressure of the grinding and / or polishing granulate against the workpiece surface and consequently a very high reproducibility can be achieved, regardless of an essentially constant or at least one over a long period of time temporarily or continuously, periodically alternating de expansion of the expansion element.
  • the container can advantageously be closed by means of a lid for this purpose, wherein the workpiece holder can be mounted on the lid, for example, so that the container with means of the lid is closed at the same time when the one or more carried by the workpiece holder (n ) Workpiece (s) is or are immersed in the bulk of the grinding and / or polishing granulate located in the container, so that very simple handling and - if desired - simple automation of the surface processing results, provided the lid with the Workpiece holder, for example, arranged on a motor-operated guide and interacts, for example, with a magazine for storing workpieces that have not yet been processed and / or a storage station for storing workpieces that have already been processed.
  • a liquid processing medium e.g. water or aqueous solutions, to which various surfactants or other additives can be added (cf. e.g. DE 102009 004 916 A1), is added to the bulk of the grinding and / or polishing granulate located in the container .
  • the container can preferably be flowed through with the liquid machining medium during machining of the workpiece, the latter preferably being recirculated and in particular cleaned and / or cooled in order to remove impurities such as dirt particles, lubricants, abrasion, etc. and / or as To serve as a cooling medium during the surface treatment, as is known as such, for example, from DE 10 2012 025 233 B4.
  • liquid inlet which is designed for supplying a liquid processing medium and which can expediently be provided on an upper level of the container, e.g. in a lid thereof, and / or
  • liquid outlet which is designed to discharge a liquid processing medium and which can expediently be provided on a lower level of the container, e.g. in a base thereof.
  • the liquid outlet can also expediently be provided with a retaining device for the grinding and / or polishing granulate, such as a sieve, a filter, a sintered metal insert or the like.
  • the process according to the invention enables basically drive any type of relative movement known from the prior art, such as
  • - Is in connection with a vibration generator, in particular in the form of an ultrasound source, a piezoelectric actuator or an unbalance drive.
  • Fig. 1 is a schematic longitudinal section through an embodiment of a device according to the invention for surface processing of workpieces with an expansion element arranged in the container for receiving a grinding and / or polishing granulate and a workpiece releasably fixed on a workpiece holder before its surface processing;
  • FIG. 2 shows a schematic longitudinal section through the device for the surface processing of workpieces according to FIG. 1 during the upper surface processing of the workpiece;
  • FIG. 3 shows a longitudinal section corresponding to FIG. 2 through a further embodiment of a device for the surface treatment of workpieces during the surface treatment of a workpiece;
  • FIG. 4 shows a schematic cross-sectional view of the loading container of the device according to FIGS. 1 and 2 along the sectional plane IV-IV of FIG. 2 in the area of the expansion element;
  • 5 shows a carrier for receiving an alternative embodiment of an expansion element
  • 6 to 9 are schematic top views of various exemplary embodiments of expansion elements with different numbers and arrangements of expansion chambers.
  • a first embodiment of a device according to the invention for the surface treatment of workpieces by immersing the workpiece in a bed of a grinding and / or polishing granulate with relative movement of the same in relation to the workpiece 1 is shown schematically, which has a container 2 serving to accommodate the bulk of the grinding and / or polishing granulate, the bulk of the grinding and / or polishing granulate not being shown in the drawing and only its filling level F in the container 2 being indicated in FIG is.
  • the device also comprises at least one workpiece holder 3, on wel chem the workpiece 3 to be machined can be detachably fixed in a conventional manner.
  • the workpiece holder 3 carrying the workpiece 1 can be moved relative to the container 2, and in the present case it is rotatable about its longitudinal axis A (see FIG. 1) and is connected to a motorized rotary drive M for this purpose.
  • the Drehan drive M is in particular speed controllable and / or regulatable in order to set the workpiece 1 during its surface processing in different rotational speeds, be they essentially constant or be they, in particular periodically, alternating.
  • the rotation-driven by means of the motor drive M workpiece holder 3 is in the embodiment shown in the drawing, for example, by means of suitable bearings 4 on a cover 5, by means of which the container 2 can be closed essentially pressure-tight when the cover 5 is connected to the Workpiece holder 3 and the workpiece 1 clamped to it has been transferred from its rest position shown in FIG. 1 to its working position shown in FIG. 2 in order to transfer the workpiece 1 into the bulk of the grinding and / or polishing granulate located in the container 2 (not shown) and to machine the surface of the workpiece 1 by setting the workpiece holder 3 in rotation by means of its rotary drive M.
  • the container 2 of the device for the surface treatment of workpieces furthermore comprises, on the one hand, a liquid inlet 6a which is arranged at an upper level of the container 2 - here: in its cover 5 essentially concentric to the workpiece holder 3 - which is used for supplying a liquid Processing medium is used.
  • the container 2 comprises a liquid outlet 6b arranged at a lower level of the same - here: essentially centrally in its bottom 7 - which serves to discharge the liquid processing medium and has a retaining device 8 for the grinding and / or polishing granulate, for example, essentially in the form of a sieve, is provided.
  • the liquid processing medium which can be, for example, an aqueous surfactant solution, can in this way be removed from the liquid outlet 6b during the surface processing of the workpiece 1, optionally cleaned and / or cooled and recirculated into the liquid inlet 6a (not shown in the drawing).
  • the device for surface processing of workpieces also has a pressure generating device 10, which is designed to press the grinding and / or polishing granulate (not shown) against the workpiece 10 in the situation of the surface processing of the workpiece 1 shown in FIG. 2.
  • the pressure generating device For this purpose, device 10 is designed to compress the volume of the container 2 available for receiving the grinding and / or polishing granulate, which the pressure generating device 10 is consequently able to reduce as required in order to reduce the granulate particles both against each other and in particular against the workpiece to press the surface.
  • the pressure generating device 10 here comprises at least one expansion element 11 arranged in the interior of the container 2, which can be expanded to compress the receiving volume of the container 1 available for receiving the grinding and / or polishing granulate (not shown).
  • the expansion element 11 is made of a particularly elastic, resilient material, such as a wear and abrasion-resistant plastic material, for example polyurethane-based, and is made on at least one section of an inner wall of the container 2 - in the present case essentially on its entire circumferential wall up to the base provided with the liquid outlet 6b. It can be designed, for example, in the manner of an inner lining or inner wall made of the elastically flexible material and at least one - here two - expansion chambers 12, which each in the circumferential direction next to one another and between the inside of the wall of the container 2 and the flexible inner wall of the expansion element 11 are formed (cf. in particular FIG. 4).
  • a particularly elastic, resilient material such as a wear and abrasion-resistant plastic material, for example polyurethane-based
  • the formed by the expansion element 11 in the inner lining or inner wall of the container 2 is on the one hand in the area of the upper end of the container 2, on the other hand in the bottom area pressure-tight with the container 2 connected, such as welded, clamped, glued or the like.
  • the expansion element 11 also has two, in particular with a reinforcement, e.g. made of a metal material, provided sealing lips 11a, which abut against the inner wall of the container 2 in a sealing manner in order to separate the expansion chambers 12 from one another in a substantially pressure-tight manner, so that if necessary they can be acted upon with a pressurized fluid under different pressures.
  • Each expansion chamber 12 of the expansion element 11 is also connected to a pressure fluid connection 13 on the outside of the container 2 in order to be able to act on it independently of one another with a pressure fluid, such as a hydraulic fluid, whereby the respective expansion chamber 12 expands and the Expansion element 11 expands in order to reduce the volume of the container 2 and in this way press the grinding and / or polishing granulate particles mechanically against the surface of the workpiece 1.
  • a pressure fluid such as a hydraulic fluid
  • the Druckmaschineungseinrich device 10 advantageously pressure-controllable and / or regulatable, which happens in the illustrated Tinsbei game by means of a pressure control and / or regulating device 14 configured, for example, in the form of a pump assigned to each pressure fluid connection 13.
  • the expansion chambers 12 of the expansion element 11 are expandable in this way independently of one another in the respective desired measure, for example in different upper surface processing stages for different contact pressures of the grinding and / or polishing granules against the workpiece 1 and / or to be able to change the contact pressure of the grinding and / or polishing granules against the workpiece 1 in particular, e.g. essentially sinusoidal, sawtooth or in any other way, in periodic cycles during its surface treatment - be it between two or more different pressure levels or be it between one or more pressure levels compared to a contact pressure of approximately zero generated by means of the pressure generating device.
  • Such periodically alternating pressurization of the expansion chambers 12 of the expansion element 11 can occur synchronously (the expansion chambers 12 are pressurized or depressurized at the same time) or alternately (the expansion chambers 12 are each pressurized or depressurized at different times), so that depending on the desired surface treatment of the workpiece 1 and depending on the material from which it is made, in particular ver different pressure and flow areas and / or different flow profiles of the grinding and / or polishing granules can be set within the container.
  • the expansion element 11 can instead have only one expansion chamber 12 or several expansion chambers 12 (not shown) that can be acted upon by the pressure fluid via a common pressure fluid connection, and / or the expansion element 11 can in turn be configured with two layers and accommodate the expansion chamber (s) 12 between these layers (also not shown).
  • Fig. 3 is a second embodiment of a device according to the invention for the surface treatment of workpieces by immersing the workpiece in a bulk of a grinding and / or polishing granulate with relative movement of the same in relation to the workpiece 1 see- automatically reproduced, in which identical and functionally identical components are provided with the same reference numerals and do not need to be discussed again.
  • the embodiment shown in Fig. 3 differs from each of Figs.
  • the loading container 2 is provided with an inner mandrel 15 which, for example, from the bottom 7 of the container 2 ago approximately centrally in it Interior protrudes and on the outside of which a further expansion element 11 is applied, the constructive configuration of which can largely correspond to that on the inner wall of the container 2 and in turn by means of a further pressure control and / or regulating device 14, e.g. again in the form of a pump Fluid pressure can be applied.
  • a further pressure control and / or regulating device 14 e.g. again in the form of a pump Fluid pressure can be applied.
  • the inner surfaces or bottoms of bores la of the workpiece 1, in which the inner mandrel 15 provided with the further Expansi onselement 11 engages, grind and / or polish in an efficacious manner by the further, on the inner mandrel 15 attached expansion element 11 is on the other hand the space between the inner mandrel and the inner circumference of the bore la of the workpiece - be it over longer processing times and / or be it periodically - to compress and thus the grinding and / or polishing granulate against the inner circumference of the bore la des Workpiece 1 is able to press on.
  • FIG. 5 shows a further embodiment of an expansion element 11 of a pressure generating device 10 which, in contrast to the expansion elements 11 according to FIGS. 1 to 4, is not connected to the container 2, but rather can be inserted individually into the container 2 .
  • the expansion element 11 according to FIG. 5 is here essentially in the manner of a bag made of a, in particular elastic, flexible material, such as a plastic material of the type mentioned above, and in turn comprises a pressure fluid connection 13 to it - expediently again by means of a pressure control and / or regulating device 14 not shown again in FIG. 5 (cf. the above FIG.
  • the expansion element designed in the manner of a bag is inserted into a carrier 16 that is designed in the manner of a cage and which is in particular around the The start of the expansion element is relatively close-meshed, while it is very coarse-meshed in the direction of the inside of the container 2 or the side of the expansion element 11 facing the inside of the container 2 can also be completely free so that the expansion element 11 is able to freely expand to allow the grinding and / or to press polishing granulate against the workpiece 1 to be machined.
  • the expansion chambers 12 of the expansion element 11 depending on Geomet rie and / or desired surface quality of the workpiece 1 have practically any shape and / or are arranged in virtually any orientation relative to each other, such as in Essentially matrix-like (FIG. 6), in the form of one (or also several; not shown) expansion chamber 12 (FIG. 7) extending along a circumferential section of the container 2 essentially in the axial direction (FIG. 7), in the form of one (or also several; not shown) along a circumferential section of the container 2 obliquely to the axial direction of the same extending expansion chamber 12 (Fig. 8), in the form of several, arranged on different circumferential sections and / or axial sections of the container 2 expansion chambers 12 with partly different and / or partly the same geometry (FIG. 9), and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

L'invention concerne un procédé pour le traitement de la surface de pièces dans lequel la pièce est immergée dans une charge de granulés de meulage ou de polissage, qui est située dans un récipient, puis est déplacée dans la charge de granulés de broyage ou de polissage selon un mouvement de va-et-vient. Pour renforcer l'efficacité du traitement de surface, l'invention propose que les granulés de broyage ou de polissage soient pressés contre la pièce pendant le traitement de surface, le volume de réception du récipient disponible pour recevoir l'élément de broyage ou de polissage étant comprimé, plus particulièrement au moyen d'un élément extensible. L'invention concerne également un dispositif pour le traitement de la surface d'une pièce apte à la mise en œuvre d'un tel procédé, lequel dispositif est équipé d'un appareil de génération de pression conçu pour comprimer le volume de réception du récipient disponible pour recevoir les granulés de broyage et/ou de polissage afin de presser les granulés de broyage et/ou de polissage contre la pièce pendant le traitement de surface de celle-ci.
PCT/EP2020/086407 2019-12-18 2020-12-16 Procédé et dispositif pour le traitement de la surface de pièces Ceased WO2021122736A1 (fr)

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DE102019008802.6A DE102019008802A1 (de) 2019-12-18 2019-12-18 Verfahren und Vorrichtung zur Oberflächenbearbeitung von Werkstücken
DE102019008802.6 2019-12-18

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CN113681440A (zh) * 2021-09-24 2021-11-23 义乌工商职业技术学院 加工圆柱工件的液动压抛光设备
CN116276606A (zh) * 2023-05-04 2023-06-23 浙江湖磨抛光磨具制造有限公司 一种曲轴光整机
CN116426910A (zh) * 2023-05-08 2023-07-14 洛阳瑞宝数控设备有限公司 一种机床刀具钝化处理设备

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DE3546386A1 (de) 1985-12-31 1987-07-02 Npk Elektronna Obrabotka Na Ma Verfahren und vorrichtung zur zentrifugal-schleifbearbeitung
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CN113681440A (zh) * 2021-09-24 2021-11-23 义乌工商职业技术学院 加工圆柱工件的液动压抛光设备
CN116276606A (zh) * 2023-05-04 2023-06-23 浙江湖磨抛光磨具制造有限公司 一种曲轴光整机
CN116426910A (zh) * 2023-05-08 2023-07-14 洛阳瑞宝数控设备有限公司 一种机床刀具钝化处理设备

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