EP0997229A1 - Verfahren und Vorrichtung zur Feinbearbeitung von im wesentlichen zylindrischen Werkstückoberflächen - Google Patents
Verfahren und Vorrichtung zur Feinbearbeitung von im wesentlichen zylindrischen Werkstückoberflächen Download PDFInfo
- Publication number
- EP0997229A1 EP0997229A1 EP99121202A EP99121202A EP0997229A1 EP 0997229 A1 EP0997229 A1 EP 0997229A1 EP 99121202 A EP99121202 A EP 99121202A EP 99121202 A EP99121202 A EP 99121202A EP 0997229 A1 EP0997229 A1 EP 0997229A1
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- EP
- European Patent Office
- Prior art keywords
- pressure
- pressing
- workpiece
- workpiece surface
- support
- 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.)
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Classifications
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- 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
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
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- 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
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- 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
- B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
- B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
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- 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
- B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
Definitions
- the invention relates to a method and an apparatus for fine machining of essentially cylindrical workpiece surfaces, especially workpiece outer surfaces.
- One from the German patent DE 30 08 606 known device for external honing of eccentrically rotating crankshaft crank pin has one Rotary drive for the crankshaft to be machined and one of the orbital revolving crankshaft crank pin Beam with two beam halves, which are above support members Support directly on the workpiece surface and with large Force can be pressed against this.
- One of the beam halves is used excluding the support, while the other half of the beam has a honing tool that supports itself press a support arm against the surface to be machined can and driven oscillatingly via a vibratory drive is.
- the halves of the carrier are adjustable in height relative to each other to train them so that they can move towards the Have the machined workpiece set.
- the device brings very good processing results. For one usually required multi-stage machining with honing and The carrier must be fully honed to replace the honing tool be opened. Then, if necessary, a new one Height adjustment may be required. The procedure until it is reached a desired surface quality can therefore be time consuming.
- the invention has for its object a method and propose a device of the type mentioned that it enable a desired surface quality quickly and to achieve reliably, especially with orbital circumferential workpiece surfaces.
- the invention proposes a method for solving this problem according to claim 1 and a device according to claim 11.
- At least one is directly connected to the Supporting member supporting the workpiece surface on the workpiece surface pressed.
- There will be at least two in Circumferential direction of the workpiece surface are supported directly or indirectly on a support member, independently operable pressure elements for Pressing on fine processing agents, especially sanding belts, provided on the workpiece surface. It will be one Relative movement of workpiece and finishing tool around a machining axis running coaxially with the workpiece surface generated, which preferably a short-stroke relative movement is superimposed in the axial direction.
- the pressure elements are operated in such a way that none of the pressure elements, one pressure element or several pressure elements Press the finishing agent onto the workpiece surface.
- the removal characteristics of the pressure elements are very variable adjustable. For example, it is possible that at least two different, preferably independent pressing elements that can be actuated from one another according to type and / or Grain or removal rate of different fine processing agents pressed simultaneously or alternately, which means that one previously not easily possible per circulation Mixed processing is made possible.
- a first fine machining means without interrupting the relative movement of the workpiece and finishing agents and / or without lifting off Support organs from the workpiece first by a first one Pressed a first fine machining means is that the first pressure element is then relieved of pressure, is withdrawn in particular and that thereafter by a second pressing element a second fine machining means is pressed, preferably another, in particular has a finer grain than the first finishing agent. It is possible pre-processing and finishing to achieve a workpiece in one operation without the device for changing fine machining means opened or the editing process in another way must be interrupted.
- At at least one pressure element preferably at least two independently operable pressure elements, Finishing agent, especially sanding belt, with a contact pressure varying in the axial direction of the workpiece and / or with a removal rate that varies in the axial direction is pressed.
- the variation is advantageously continuous or stepless, which means that the finished workpiece surface bumps running in the circumferential direction how grooves or steps can be avoided.
- the variation can be generated by e.g. Abrasive belt with in axial Pressed in the direction of varying elastic compliance becomes.
- a varying contact pressure in one direction Processing section offers the possibility, for example an undesired taper in a crankshaft bearing increased removal in the area of larger cross-section quickly and reliably eliminate or other deviations from a desired, for example cylindrical ideal shape remove.
- At least one Pressing element fine processing means such as sanding belt, is pressed in such a way that the contact pressure and / or the Material removal rate from a central area of the machining section to axial edge areas of the machining section, preferably continuous and / or symmetrical to Middle area increases or it can be used, for example, for reduction an undesirable crown so that the Contact pressure and / or the removal rate from the central area the edge areas preferably continuously and / or symmetrically decreases towards the central area.
- Pressing element fine processing means such as sanding belt
- a pressure control can be specified, continuously or discontinuously changing contact pressure is applied, which is particularly hydraulic, but possibly also piezoelectric, can be generated electromechanically and / or pneumatically.
- the pressure curve for example sinusoidal, rectangular or can be sawtooth-shaped and possibly the pulse frequency, e.g. can be between 2 and 100 pressing phases per revolution, can be customized.
- the pulse frequency e.g. can be between 2 and 100 pressing phases per revolution.
- pulsating pressure can, if necessary, even without complete pressure relief better rinsing of the finishing agent can be used.
- Another advantageous processing variant stands out characterized in that all pressure elements with rotating workpiece so relieved of pressure, in particular lifted off that only support elements are supported on the workpiece surface.
- This "idling" without pressing, material-removing, fine processing agents roughness tips the machined surface a little smoothed can, so that an even lower Ra value and a higher Load share can be achieved without measurable changes the macro shape of the processed area.
- the Shape and / or surface condition of the processed Workpiece surface during the relative movement by means of preferably emitting at least one sensor signal contactlessly operating sensor device is detected and that the contact pressure in at least one pressure element Dependence on the sensor signals is controlled.
- a pressure element particularly well as this as an adjusting element has a much smaller moving mass than, for example an entire print arm of a band finish or Honing machine and because of the contact pressure without any consideration the dynamic additional forces derived via the support member can be varied.
- the measurement control offers in connection with the support Another great advantage directly on the workpiece.
- the Measurement-controlled processing becomes conventional when it is reached Target dimension of the machining process canceled in that the respective device opened and thus the finishing agent is peeled off the surface.
- the processing process for one finished axial section can be finished by that the assigned pressure elements are relieved of pressure or be lifted off while associated support members continue to the workpiece surface remain pressed so that the device can follow the eccentric circumferential section. In this way it is e.g. possible when editing a crankshaft for each axial machining section separate processing when the target dimension is reached cancel while continuing in other places becomes.
- a device suitable for carrying out the method has at least one for direct support on the workpiece surface trained support member, at least two in Circumferential direction of the workpiece arranged offset to itself a support member directly or indirectly, separately or independently operable pressing elements for Pressing fine machining agent onto the workpiece surface and means for generating a relative movement between Workpiece and finishing tool to be coaxial with the Machining axis, the workpiece surface preferably a short-stroke relative movement in the axial direction is superimposed.
- a single support may be sufficient, one has preferred embodiment several, preferably evenly support members distributed around the circumference, each of which assigned at least one, preferably only one pressure element is. This allows a particularly uniform Achieve distribution of forces during machining.
- Machining axis opposite, essentially identical in shape and preferably essentially mirror-symmetrical can be arranged to a mirror plane of the device Support organs. These can be on a common, two-armed Carrier device may be arranged, for example for a workpiece change, can be swiveled open.
- a support member can extend over one or more support surface sections Support directly on the workpiece.
- the support surface preferably smooth or essentially non-abrasive, so that material-removing processing essentially only takes place where fine machining means through the Pressing elements is pressed onto the workpiece surface.
- the area of support elements can possibly be a material-displacing one and / or possibly solidifying the surface Surface treatment can be effected or it may be that with detached cutting grains with a lapping machining loose grain is effected.
- each support member at least one, preferably only one, the associated pressing element upstream and at least one, preferably only one support element downstream of the pressing element provided, the pressing element preferably symmetrical is arranged between the support elements.
- a support on both sides of the pressure element ensures a special anti-tip guide. It has proven itself when the support elements a circumferential angular distance of less than 150 ° and preferably have more than 90 °, with angular distances between 100 and 130 °, in particular of approximately 120 ° preferred are. These provide good support after all Directions without pinching the workpiece and offer on the other hand, enough space between the support areas Attach several if necessary offset in the circumferential direction and / or pressing elements which may be extended in the circumferential direction.
- the fine processing agent can be in the form of a pressure element sintered or soldered coating.
- the finishing tool is an abrasive belt that is relative is movable to the pressure element.
- the pressure element preferably forms a cylindrical section, for example Pressure surface of a predetermined shape, that of the desired one Shape of the finished workpiece surface is adjusted. It has proven particularly useful if the Pressure surface a circumferential angle of more than 60 °, preferably between 70 ° and 90 °, in particular about 80 °.
- a possible sanding belt wrap angle of more than 60 ° per pressing element makes it possible that short-wave Roundness errors of the workpiece automatically special can be effectively corrected.
- At least one Pressure element preferably at least two of each other independently actuate pressure elements so that through them fine processing agents, especially sanding belts, preferably in the axial direction of the workpiece continuously varying contact pressure and / or with in Axial direction preferably continuously varying Removal rate can be pressed, preferably the Contact pressure symmetrical to a central area of a machining section varies.
- This can be done, for example achieved that at least one pressing element Has pressing surface, in which a substantially cylindrical Curvature in the circumferential direction is a curvature in the axial direction is superimposed.
- the curvature preferably runs here in the axial direction continuously and / or symmetrically to one axial central area of the pressure surface. If the curvature in Axial direction to the workpiece surface is convex and the Pressure surface, for example in the middle area of the workpiece surface closest is so in this area Removal performance compared to the axial edge areas extraordinary big. Conversely, with a pressure element Pressure surface in the axial direction also from the workpiece surface concave away, so that for example in the middle the distance between the workpiece surface and the pressing surface compared to the edge areas is large and there there is a correspondingly lower removal rate.
- a particularly gently varying pressure distribution can be thereby achieve that on a pressure element Pressure-forming layer made of elastically compressible Material is arranged, the layer thickness in the axial direction, preferably continuously and / or symmetrically to one Middle area of the machining section varies. It can So one in the axial direction corresponding to the layer thickness of the elastic material varying elastic resilience the pressure surface can be created.
- the layer that may an essentially cylindrical section-shaped pressing surface can form, ensures that the pressure distribution in the axial direction softened compared to a rigid pressure surface is so that disadvantageous peaks of contact pressure and / or removal performance can be avoided.
- Some developments of the invention can also be applied to methods and devices may be advantageous in which in one Axial section only in a single circumferential section or several pressure elements are provided. They are in particular the pulsating pressing of at least one Pressing element, the temporary lifting of at least one Pressing element during the finishing, if necessary with it connected retraction of the sanding belt in a lifting phase and the described measurement-dependent control of the contact pressure and process variants thereby made possible, in particular the application of an axially varying contact pressure through a single pressing element and the selective termination of the machining process in individual axial machining sections continuing processing in other, not yet finished sections.
- Fig. 1 is a cylindrical bearing journal 1 in axial view a crankshaft 4 to be seen by a not shown Rotary drive is rotated about its longitudinal axis such that the journal in the direction of arrow 2 around its central Longitudinal axis 3 rotates. If the journal 1 a with the Crankshaft longitudinal axis is coaxial main bearing journal, so is Longitudinal axis 3 essentially stationary. It is Bearing journal 1, however, around an eccentric to the crankshaft longitudinal axis arranged crankshaft crank pin, so is the Rotational movement in direction 2 an orbital movement of the entire Bearing pin around the parallel to axis 3 Crankshaft longitudinal axis superimposed.
- the bearing journal 1 is made of two halves 5 and 6, respectively surrounded as the finishing arm support 7, the two arms 8 or 9.
- the two arms 8, 9 are not in one machine part shown pivotally mounted against each other.
- Via a hydraulic adjustment device for example the two arms can be used to install the workpiece in the Device opened and then closed in this way be that the two arms shown the workpiece in the Include Kind.
- Via an axial vibratory drive not shown can move the workpiece and / or the Carrier in the axial direction 3 a short-stroke axial relative movement between the entire support 7 and the workpiece 1 be generated.
- the entire device has to be used simultaneously Machining of main bearings and connecting rod bearings several in Axial direction arranged side by side, on a common Machine frame arranged finish units of the shown Art.
- the units are each very narrow (Fig. 2) to simultaneously process adjacent bearings can. Their dimensions are no longer than the length of the bearing plus the proportional (half) axial dimensions of the Crank webs.
- Each support half 5 or 6 has one at the lower end of the assigned arm firmly screwed support member 10 or 11, which has the basic shape of a narrow in the axial direction 3, upright cuboid (see FIG. 2) with a workpiece 1 facing, circular segment-shaped recess 12 or 13 has, which is why a support member as a shell or Finish bowl is called.
- the two support halves 5, 6 or support members 10, 11 are in the working position shown mirror image of one containing the longitudinal axis 3 Plane of symmetry 14 arranged. They are relative in height fixed to each other and to achieve the highest machining accuracy together concentrically in one device been ground out.
- a support member 11 has Area of its shell recess 13 two at a circumferential angle of approx. 120 ° to each other and at an angle of approx. 30 ° to the plane of symmetry 14 offset from this Guide strips 15, 16, each made of hard material, over the entire axial width of a support member extend and a substantially smooth, the workpiece contour have an adapted surface facing the workpiece. she ensure a jam-free, direct support of the support member across the workpiece surface in all directions to axis 3.
- the pressure element designed as a pressure shoe 20 provided that a cylindrically curved, the workpiece facing pressure surface 21 has a predetermined shape, that of the desired shape of the finished workpiece surface is adapted and over a circumferential angle of extends approx. 80 ° in compliance with the workpiece.
- the pressure surface can as in the example shown, essentially rigid, for example made of hard material, or also flexible be and for example from an elastically compressible Be piece of material formed. It can also be distributed over a large area elastic areas in addition to essentially rigid areas available.
- the pressure shoe 20 is seated in a recess 13 opened rectangular recess 17 of the support member 11 and is opposite this by means of two in cylindrical bores of the support member guided bolt 24 so linear movably guided that it is radial to the machining axis 3rd is movable.
- One the pressure shoe 20 in the direction of the pressing device pushing the workpiece or moving it away has two against the actuator or actuator Force of a spring 23 can be advanced in the direction of the workpiece, with the bolt identical hydraulic piston 24, which has a Hydraulic line 25 can be acted upon with fluid pressure.
- Actuating pistons are preferred, in principle also any other actuators, e.g. Piezo translators or solenoids can be used.
- any other actuators e.g. Piezo translators or solenoids can be used.
- one in the axial direction essentially even contact pressure of the shoe 20 causes to produce a varying in the axial direction
- Contact pressure of a pressure element also several in axially offset and / or attacking Actuators which can be operated independently of one another are provided be that can generate different forces to the Height of material removal in the axial direction of the workpiece controlled influence.
- a corresponding pressure shoe can, for example, in its associated support member approximately tangential to the workpiece surface and perpendicular vertical to the longitudinal direction of the workpiece (axis 3) Pivot axis be pivotally mounted.
- mirror-image pressure shoe 19 is in an analogous manner Interplay between hydraulic pressure and spring force can be pressed or retractable, the control via one of the line 25 separate hydraulic line 26 regardless of the control of the shoe 20.
- This is an arrangement with two circumferentially offset by 180 °, separately or independently pressure elements that can be actuated from one another.
- At other embodiments are several per support element, in particular two pressure elements which can be actuated independently of one another intended.
- versions with only one support element or with more than two, for example three or four, especially evenly distributed around the workpiece circumference Support organs are possible.
- the pressure shoe 20 presses in the illustration in FIG. 1 through a band guide 30 in the area of the pressure shoe guided grinding belt 31 to the workpiece surface.
- the Belt guide has a pair of im for each pressing element essentially tangential to the workpiece surface and perpendicular vertical to axis 3, also good in Fig. 2 recognizing oval tape guide openings 32, 33, which vertically from the vertical top or bottom of the support member into the area of the pressing element 20 extend and the workpiece side between pressure element and the associated guide strips 15 and 16 in the processing area flow out.
- the finish belt can pass through these recesses be guided in the shell so that the support strips 15, 16 can rest directly on the workpiece 1 and not be undermined by finishing tape.
- the axial width of the guide openings 32, 33rd is less than half as wide as the axial width of one Support element / pressure element combination or that of this width corresponding width of the sanding belt.
- the band 31 in the oval areas where it passed through the openings is turned in a U-shape, with the smooth side outside and the grinding side is inside.
- roller-shaped deflection elements 34, 35 and in The area of the pressing element 20 then has the band again taken up its straight, fully unfolded form in the axial direction.
- the course of the belt between the deflection rollers 34, 35 is essentially straight forward, which means trouble-free operation promotes.
- the two become independent pressure segments 19 which can be actuated hydraulically from one another, 20 of the same type of sanding belt. It is however possible, separate on the left and right Abrasive belts, especially with different grain sizes to use.
- the finishing process be carried out under measurement control.
- the Device at least one during the machining process operable, designed to emit sensor signals Sensor 40 for detecting the shape and / or surface quality the machined workpiece surface.
- a control device not shown, can transmit the sensor signals process and at least one actuator, for example the hydraulic actuator 23, 24, preferably several or all actuators depending on the sensor signals head for.
- the schematic top view in FIG. 3 shows an embodiment, which enables shape corrections to be made Perform workpiece in axial section.
- the diametrical Pressure elements 45, 46 are exactly like those of the embodiment 1 arranged and independent of each other radially displaceable on the workpiece surface or from this can be lifted off.
- the pressure elements are in the range of their workpiece-facing pressing surfaces 48, 49 provided, one between the pressing element and the workpiece surface carried out grinding belt 43, 44 to the workpiece surface to press.
- Each of the pressure elements has one essentially incompressible, rigid, half-shell-shaped metallic body 50, 51 with a workpiece facing Front surface 52, 53, on which a thin layer 54, 55 is made a relatively pressure-resistant, but slightly elastic compressible material, for example Vulcolan is applied.
- the coated front surfaces 52, 53 are circumferential essentially curved in the shape of a cylindrical section, wherein this curvature in an axial direction parallel to axis 3 another curvature overlaid.
- Pressure element 45 runs the continuous axial Curvature symmetrical to the axial central region 56 such that the front surface is concave from the workpiece in the axial direction is curved away and to the axial edge regions 57, 58 continuously approaches the workpiece surface.
- the Front surface 53 extends in the axial direction to the workpiece surface curved so that the front surface in the middle 59 is closer to the workpiece surface than to both axial Edge areas 60, 61.
- the layer thickness of the compressible The material varies axially for both pressure elements Direction continuous and is chosen so that the Workpiece or the abrasive belt facing pressure surfaces of the Layers essentially cylindrical, that is, in the axial direction just passed.
- the embodiment shown enables the described Correction of the shape of the machined workpiece surface a single linearly guided pressure element, without that this can be pivoted in the manner described above must be trained.
- the pressure elements are thus on both sides individually or in a specific pressing force or used in a specific chronological order.
- the interposition of an elastically flexible layer between the rigid body of the pressure element and the with the contact surface interacting with the grinding belt helps expedient to mitigate pressure force peaks and by the Shape of the rigid body specified pressure distribution to smooth out.
- the axial variation of the Contact pressure can be achieved even without elastic layers, for example by pressing them directly onto the sanding belt Pressure element body 50, 51, in which case their Front surfaces 52, 53 form the pressing surface.
- the axial middle or edge area of the pressure surfaces to be provided with a small step or shallow groove, whose depth can be very small. For example, one more or less clear "paragraph" in the machined workpiece surface generated to influence certain areas.
- Circumferential contour can these only take up part of the circumference. So can e.g. at the ends of the pressing element lying in the circumferential direction Areas in the (axial) center or the edge opposite the cylindrical contact surface should be slightly recessed.
- a different inclination of the pressure or Machining areas opposite the axis direction or a other asymmetry can be useful to consciously match Workpiece contours, e.g. Conicity, to generate or dismantle.
- Pressure elements with axially varying elastic compliance of the pressure surface can also Devices not according to the invention, e.g. with only one Pressure element, be advantageous.
- the advantages made possible by the invention come entirely especially when machining eccentric rotating Workpiece surfaces, such as crankshaft crank pins, for carrying, where it is possible thanks to the support elements, the mass forces or derive inertial forces via the support members and completely decouple from the pressure elements that regardless of the support organs with usually clearly lower contact pressure than the support members against that machining workpiece can be pressed. Because the Pressure elements completely freed from management tasks are, they can in the variable manner described pressed or lifted off to get the desired machining result to achieve quickly and with high quality.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
- Fig. 1
- eine teilweise geschnittene Axialansicht einer Bandfinishvorrichtung, die insbesondere bei der Feinbearbeitung von Kurbelwellen-Lagerflächen einsetzbar ist und
- Fig. 2
- eine Draufsicht auf die in Fig. 1 gezeigte Vorrichtung und
- Fig. 3
- eine schematische Draufsicht auf ein Kurbelwellenlager mit zwei diametral gegenüberliegenden Andrückelementen zur Aufbringung eines in Axialrichtung variierenden Anpreßdruckes auf ein Schleifband.
Claims (25)
- Verfahren zur Feinbearbeitung einer im wesentlichen zylindrischen Werkstückoberfläche, insbesondere Werkstückaußenfläche, eines Werkstückes mit folgenden Schritten:Andrücken mindestens eines sich direkt an der Werkstückoberfläche abstützenden Abstützorgans an die Werkstückoberfläche;Bereitstellung von mindestens zwei in Umfangsrichtung der Werkstückoberfläche versetzt angeordneten, sich an einem Abstützorgan abstützenden, unabhängig voneinander betätigbaren Andrückelementen zum Andrücken von Feinbearbeitungsmittel, insbesondere Schleifband, an die Werkstückoberfläche;Relativbewegung von Werkstück und Feinbearbeitungsmittel;Betätigung der Andrückelemente derart, daß wahlweise kein Andrückelement, ein Andrückelement oder mehrere Andrückelemente Feinbearbeitungsmittel an die Werkstückoberfläche andrücken.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß durch mindestens zwei unterschiedliche, vorzugsweise voneinander unabhängig betätigbare Andrückelemente nach Art und/oder Abtragcharakteristik unterschiedliche Feinbearbeitungsmittel angedrückt werden, insbesondere Schleifbänder unterschiedlicher Körnung.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ohne Unterbrechung der Relativbewegung und/oder ohne Abheben des Abstützorgans von der Werkstückoberfläche zuerst durch ein erstes Andrückelement ein erstes Feinbearbeitungsmittel angedrückt wird, daß danach das erste Andrückelement druckentlastet, insbesondere zurückgezogen wird und daß danach durch ein zweites Andrückelement ein zweites Feinbearbeitungsmittel angedrückt wird, das vorzugsweise eine feinere Abtragscharakteristik hat als das erste Feinbearbeitungsmittel.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens ein Andrückelement während der Feinbearbeitung zwischen Andrückphasen zeitweise unter Aufhebung von Anpreßdruck zurückgezogen wird, wobei vorzugsweise während einer Phase mit zurückgezogenem Andrückelement das zugeordnete Feinbearbeitungsmittel ersetzt wird, wobei insbesondere unverbrauchtes Schleifband in den Bereich des Andruckelementes gebracht wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß bei mindestens einem Andrückelement, vorzugsweise bei mindestens zwei voneinander unabhängig betätigbaren Andrückelementen, Feinbearbeitungsmittel, insbesondere Schleifband, mit einem in Axialrichtung des Werkzeuges, vorzugsweise kontinuierlich, variierenden Anpreßdruck und/oder mit in Axialrichtung, vorzugsweise kontinuierlich, variierender Abtragsleistung an die Werkstückoberfläche angedrückt wird, wobei vorzugsweise durch mindestens ein Andrückelement Feinbearbeitungsmittel derart angedrückt wird, daß der Anpreßdruck und/oder die Abtragsleistung in axialer Richtung verändert wird, insbesondere von einem Mittelbereich des zugeordneten Bearbeitungsabschnittes zu axialen Randbereichen des Bearbeitungsabschnittes, vorzugsweise kontinuierlich und/oder symmetrisch zum Mittelbereich zunimmt oder abnimmt.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß eine elastische Nachgiebigkeit einer Andrückfläche des Andrückelements von einem Mittelbereich des zugeordneten Bearbeitungsabschnittes zu axialen Randbereichen des Bearbeitungsabschnittes, vorzugsweise kontinuierlich und/oder symmetrisch zum Mittelbereich zunimmt oder abnimmt.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens ein Andrückelement zur Feinbearbeitung mit wechselndem Anpreßdruck, insbesondere pulsierendem Anpreßdruck, beaufschlagt wird, wobei vorzugsweise mehrere oder alle Andrückelemente mit pulsierendem Anpreßdruck beaufschlagt werden.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß bei Aufrechterhaltung der Relativbewegung alle Andrückelemente derart druckentlastet, insbesondere zurückgezogen werden, daß nur das Abstützorgan auf die Werkstückoberfläche aufgedrückt ist.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Form und/oder Oberflächenbeschaffenheit der bearbeiteten Werkstückoberfläche während der Relativbewegung mittels mindestens einer Sensorsignale abgebenden Sensoreinrichtung erfaßt werden und daß der Anpreßdruck mindestens eines Andruckelementes in Abhängigkeit von den Sensorsignalen gesteuert wird, wobei vorzugsweise an relativen radialen Hochpunkten einer Werkstückoberfläche ein Andrückelement mit höherem Anpreßdruck beaufschlagt wird und/oder an relativen radialen Tiefpunkten ein Andrückelement druckentlastet wird.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß bei mehreren in Axialrichtung des Werkstücks aufeinanderfolgenden Bearbeitungsabschnitten mit unabhängig meßwertabhängig ansteuerbaren Andrückelementen in mindestens einem Bearbeitungsabschnitt Andrückelemente bei Erreichen eines vorgebbaren Bearbeitungsergebnisses druckentlastet, insbesondere zurückgezogen werden, während Andrückelemente in anderen Bearbeitungsabschnitten weiterhin angedrückt werden.
- Vorrichtung zur Feinbearbeitung einer im wesentlichen zylindrischen Werkstückoberfläche, insbesondere Werkstückaußenfläche eines Werkstücks (1) mittels Feinbearbeitungsmittel, insbesondere Bandfinishvorrichtung, mit mindestens einem zur direkten Abstützung an der Werkstückoberfläche ausgebildeten Abstützorgan (10, 11); mindestens zwei in Umfangsrichtung versetzt angeordneten, sich an einem Abstützorgan abstützenden, voneinander unabhängig betätigbaren Andrückelementen (19, 20; 45, 46) zum Andrücken des Feinbearbeitungsmittels (31; 43, 44) an die Werkstückoberfläche und Mitteln zur Erzeugung einer Relativbewegung zwischen Werkstückoberfläche und Feinbearbeitungsmittel.
- Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß mehrere gleichmäßig um den Umfang verteilte Abstützorgane (10, 11) vorgesehen sind, wobei vorzugsweise jedem Abstützorgan mindestens ein, vorzugsweise nur ein Andrückelement (19, 20; 45, 46) zugeordnet ist und/oder daß zwei diametral zu einer Bearbeitungsachse (3) gegenüberliegend, vorzugsweise im wesentlichen spiegelsymmetrisch zu einer Spiegelebene (14) der Vorrichtung anordenbare Abstützorgane (10, 11) vorgesehen sind.
- Vorrichtung nach einem der Ansprüche 11 oder 12, dadurch gekennzeichnet, daß ein Abstützorgan (10, 11) mindestens ein, vorzugsweise mehrere, insbesondere auswechselbar an einem Körper des Abstützorgans anbringbare, Abstützelemente (15, 16) zur direkten Abstützung an der Werkstückoberfläche aufweist, vorzugsweise die Abstützelemente als axiale Führungsleisten (15, 16) ausgebildet sind.
- Vorrichtung nach einem der Ansprüche 11 bis 13, dadurch gekennzeichnet, daß das Abstützorgan, insbesondere das Abstützelement (15, 16), eine zum Berührungskontakt mit der Werkstückoberfläche vorgesehene Abstützfläche hat, die im wesentlichen glatt und/oder nicht-abrasiv ist.
- Vorrichtung nach einem der Ansprüche 11 bis 14, dadurch gekennzeichnet, daß mindestens ein, vorzugsweise nur ein in Umfangsrichtung dem Andrückelement (19, 20; 45, 46) vorgeschaltetes und mindestens ein, vorzugsweise nur ein dem Andrückelement nachgeschaltetes Abstützelement (15 bzw. 16) vorgesehen ist, wobei vorzugsweise die Abstützelemente symmetrisch zum Andrückelement angeordnet sind.
- Vorrichtung nach einem der Ansprüche 11 bis 15, dadurch gekennzeichnet, daß die Abstützbereiche, insbesondere Abstützelemente (15, 16) eines Abstützorgans einen Umfangs-Winkelabstand haben, der zwischen 90° und 150°, insbesondere zwischen 100° und 130°, vorzugsweise ca. 120° beträgt.
- Vorrichtung nach einem der Ansprüche 11 bis 16, dadurch gekennzeichnet, daß ein Andrückelement eine, vorzugsweise zylindrisch gekrümmte, Andrückfläche (21) fest vorgegebener Form bildet, die der gewünschten Form der fertig bearbeiteten Werkstückoberfläche angepaßt ist und/oder daß ein Andrückelement eine Andrückfläche (21; 48, 49) hat, die einen Umfangswinkel von mehr als 60°, vorzugsweise zwischen 70 und 90°, insbesondere ca. 80° einschließt und/oder daß ein Andrückelement eine starre Andrückfläche, insbesondere aus Hartmaterial, oder eine elastisch nachgiebige Andrückfläche, insbesondere aus elastischem Material, oder eine Andrückfläche mit einer Kombination von harten und elastisch nachgiebigen Bereichen hat.
- Vorrichtung nach einem der Ansprüche 11 bis 17, dadurch gekennzeichnet, daß mindestens ein Andrückelement eine Vorderfläche (52, 53) hat, die in axialer Richtung eine sich ändernde Kontur hat, insbesondere bzgl. Durchmesser, wirksamer Bearbeitungsfläche und/oder Elastizität, wobei vorzugsweise der Vorderfläche (52, 53) einer im wesentlichen zylindrischen Krümmung in Umfangsrichtung ein Verlauf überlagert ist, der von einem zur Werkstückachse achsparallelen Verlauf abweicht, insbesondere eine Krümmung in Axialrichtung bildet, wobei ggf. die Krümmung in Axialrichtung kontinuierlich und/oder symmetrisch zu einem axialen Mittelbereich der Vorderfläche verläuft, wobei vorzugsweise bei mindestens einem Andrückelement (46) die Krümmung in Axialrichtung zur Werkstückoberfläche konvex verläuft und/oder daß bei mindestens einem Andrückelement (45) die Krümmung in Axialrichtung von der Werkstückoberfläche weg konkav verläuft.
- Vorrichtung nach Anspruch 18, dadurch gekennzeichnet, daß auf der Vorderfläche (52, 53) eine Schicht (54, 55) aus elastisch nachgiebigem Material angeordnet ist, deren Schichtdicke in Axialrichtung, vorzugsweise kontinuierlich und/oder symmetrisch zu einem Mittelbereich, variiert, wobei die Schicht vorzugsweise eine im wesentlichen zylindrische Andrückfläche (48, 49) bildet.
- Vorrichtung nach einem der Ansprüche 18 oder 19, dadurch gekennzeichnet, daß mindestens ein Andrückelement (46) mit einer in Axialrichtung konvex gekrümmten Vorderfläche (53) und mindestens ein unabhängig von diesen betätigbares Andrückelement (45) mit einer in Axialrichtung konkav gekrümmten Vorderfläche (52) vorgesehen ist.
- Vorrichtung nach einem der Ansprüche 11 bis 20, dadurch gekennzeichnet, daß ein Andrückelement (19, 20) an und/oder in dem zugeordneten Abstützorgan (10, 11) linear beweglich geführt ist, vorzugsweise derart, daß es in einer radial zur Werkstückoberfläche verlaufenden Richtung verschiebbar ist, und/oder daß die Vorrichtung mindestens einen an dem Andrückelement (20) und dem zugeordneten Abstützorgan (21) angreifenden, vorzugsweise hydraulischen, Stellantrieb (23, 24) zur Erzeugung einer Relativbewegung von Andrückelement und Abstützorgan aufweist.
- Vorrichtung nach einem der Ansprüche 11 bis 22, dadurch gekennzeichnet, daß das Feinbearbeitungsmittel mindestens ein Schleifband (31; 43, 44) aufweist, das relativ zu dem Andrückelement beweglich ist.
- Vorrichtung nach einem der Ansprüche 11 bis 22, dadurch gekennzeichnet, daß zur Führung von Schleifband (31) in den oder aus dem Bereich eines Andrückelements (20) eine Bandführung (30) vorgesehen ist, die Bandführungsöffnung (32, 33) aufweist, die in Umfangsrichtung zwischen einem Andrückelement (20) und zugeordneten Abstützbereichen, insbesondere Abstützelementen (15, 16), angeordnet sind, wobei vorzugsweise eine Bandführungsöffnung (32, 33) im wesentlichen tangential zur zylindrischen Werkstückoberfläche verläuft und/oder daß eine, vorzugsweise ovale, Bandführungsöffnung einen axialen Durchmesser hat, der geringer ist als eine axiale Breite eines zugeordneten Andrückelementes udn/oder Schleifbandes.
- Vorrichtung nach einem der Ansprüche 11 bis 23, dadurch gekennzeichnet, daß sie mindestens eine während der Relativbewegung betreibbare, zur Abgabe von Sensorsignalen ausgebildete, vorzugsweise berührungslos arbeitende Sensoreinheit (40) zur Erfassung der Form und/oder Oberflächenbeschaffenheit der bearbeiteten Werkstückoberfläche aufweist, wobei vorzugsweise die Vorrichtung eine zur Verarbeitung des Sensorsignals ausgebildete Steuereinrichtung aufweist, durch die mindestnes ein Stellantrieb (23, 24) für ein Andruckelement in Abhängigkeit von dem Sensorsignal ansteuerbar ist.
- Vorrichtung nach einem der Ansprüche 11 bis 24, dadurch gekennzeichnet, daß eine Axialbewegungseinrichtung zur Erzeugung einer kurzhubig oszillierenden axialen Relativbewegung zwischen Werkstück und einem mit mindestens einem Andrückelement versehenem Abstützorgan vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19850216A DE19850216A1 (de) | 1998-10-31 | 1998-10-31 | Verfahren und Vorrichtung zur Feinbearbeitung von im wesentlichen zylindrischen Werkstückoberflächen |
DE19850216 | 1998-10-31 |
Publications (2)
Publication Number | Publication Date |
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EP0997229A1 true EP0997229A1 (de) | 2000-05-03 |
EP0997229B1 EP0997229B1 (de) | 2003-12-17 |
Family
ID=7886249
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EP99121202A Expired - Lifetime EP0997229B1 (de) | 1998-10-31 | 1999-10-23 | Verfahren und Vorrichtung zur Feinbearbeitung von im wesentlichen zylindrischen Werkstückoberflächen |
Country Status (3)
Country | Link |
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EP (1) | EP0997229B1 (de) |
AT (1) | ATE256530T1 (de) |
DE (2) | DE19850216A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1447171A1 (de) * | 2003-02-12 | 2004-08-18 | Nissan Motor Co., Ltd. | Vorrichtung und Verfahren zur Oberflächen-Endbearbeitung |
EP1447170A1 (de) * | 2003-02-12 | 2004-08-18 | Nissan Motor Co., Ltd. | Vorrichtung und Verfahren zur Oberflächen-Endbearbeitung |
WO2015169484A1 (de) * | 2014-05-05 | 2015-11-12 | Supfina Grieshaber Gmbh & Co. Kg | Bandfinishvorrichtung und verfahren zum betrieb einer bandfinishvorrichtung |
DE102015122189A1 (de) * | 2015-12-18 | 2017-06-22 | Thielenhaus Technologies Gmbh | Finishwerkzeug mit lokal variierender Schnittigkeit |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10332605B4 (de) * | 2003-07-17 | 2005-09-15 | Ibz Gmbh | Anpressvorrichtung für eine Oberflächenbearbeitungsvorrichtung |
DE102007059926A1 (de) | 2007-12-04 | 2009-06-10 | Nagel Maschinen- Und Werkzeugfabrik Gmbh | Vorrichtung zur Finishbearbeitung von Umfangsflächen im Wesentlichen rotationssymmetrischer Werkstückabschnitte an wellenförmigen Werkstücken |
DE102008035313B3 (de) * | 2008-07-23 | 2009-12-03 | Nagel Maschinen- Und Werkzeugfabrik Gmbh | Verfahren und Vorrichtung zur Feinbearbeitung von Umfangsflächen rotationssymmetrischer Werkstückabschnitte von Werkstücken aus Grauguss |
DE102012019814B4 (de) | 2012-10-10 | 2014-11-06 | Hochschule Magdeburg-Stendal | Vorrichtung zur Feinbearbeitung von konvexen Werkstückoberflächen |
DE102016116038A1 (de) | 2016-08-29 | 2018-03-01 | Supfina Grieshaber Gmbh & Co. Kg | Oberflächenbearbeitungseinrichtung, insbesondere Finish- oder Honeinrichtung |
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DE19650155C1 (de) * | 1996-12-04 | 1998-06-25 | Supfina Grieshaber Gmbh & Co | Bearbeitungsvorrichtung |
US5775974A (en) * | 1996-12-10 | 1998-07-07 | K-Line Industries, Inc. | Universal jaw attachment for microfinishing machine |
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- 1998-10-31 DE DE19850216A patent/DE19850216A1/de not_active Withdrawn
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- 1999-10-23 EP EP99121202A patent/EP0997229B1/de not_active Expired - Lifetime
- 1999-10-23 AT AT99121202T patent/ATE256530T1/de not_active IP Right Cessation
- 1999-10-23 DE DE59908093T patent/DE59908093D1/de not_active Expired - Fee Related
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DE3008606A1 (de) * | 1980-03-06 | 1981-09-10 | Peter 7442 Neuffen Nagel | Vorrichtung zur feinbearbeitung von exzentrisch umlaufenden flaechen |
US4979335A (en) * | 1988-04-21 | 1990-12-25 | Ford Motor Company | Apparatus for precision machining crank pins of crankshafts |
US5522762A (en) * | 1993-03-18 | 1996-06-04 | Societe Procedes Machines Speciales S.P.M.S. | Tool for applying surface coated abrasives for use on a machine for abrasion machining of cylindrical surfaces on workpieces |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1447171A1 (de) * | 2003-02-12 | 2004-08-18 | Nissan Motor Co., Ltd. | Vorrichtung und Verfahren zur Oberflächen-Endbearbeitung |
EP1447170A1 (de) * | 2003-02-12 | 2004-08-18 | Nissan Motor Co., Ltd. | Vorrichtung und Verfahren zur Oberflächen-Endbearbeitung |
US7033245B2 (en) | 2003-02-12 | 2006-04-25 | Nissan Motor Co., Ltd. | Lapping apparatus and lapping method |
US7794306B2 (en) | 2003-02-12 | 2010-09-14 | Nissan Motor Co., Ltd. | Surface finishing apparatus and related method |
WO2015169484A1 (de) * | 2014-05-05 | 2015-11-12 | Supfina Grieshaber Gmbh & Co. Kg | Bandfinishvorrichtung und verfahren zum betrieb einer bandfinishvorrichtung |
GB2539611A (en) * | 2014-05-05 | 2016-12-21 | Supfina Grieshaber Gmbh & Co Kg | Belt-finishing device and method for operating a belt-finishing device |
GB2539611B (en) * | 2014-05-05 | 2017-04-26 | Supfina Grieshaber Gmbh & Co Kg | Belt-finishing device and method for operating a belt-finishing device |
US9802291B2 (en) | 2014-05-05 | 2017-10-31 | Supfina Grieshaber Gmbh & Co. Kg | Belt-finishing device and method for operating a belt-finishing device |
DE102015122189A1 (de) * | 2015-12-18 | 2017-06-22 | Thielenhaus Technologies Gmbh | Finishwerkzeug mit lokal variierender Schnittigkeit |
Also Published As
Publication number | Publication date |
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DE19850216A1 (de) | 2000-05-04 |
DE59908093D1 (de) | 2004-01-29 |
EP0997229B1 (de) | 2003-12-17 |
ATE256530T1 (de) | 2004-01-15 |
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