EP2650081B1 - Procédé et dispositif de finition d'une surface de pièce usinée - Google Patents

Procédé et dispositif de finition d'une surface de pièce usinée Download PDF

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Publication number
EP2650081B1
EP2650081B1 EP12164131.0A EP12164131A EP2650081B1 EP 2650081 B1 EP2650081 B1 EP 2650081B1 EP 12164131 A EP12164131 A EP 12164131A EP 2650081 B1 EP2650081 B1 EP 2650081B1
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EP
European Patent Office
Prior art keywords
workpiece
movement
axis
additional
workpiece surface
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.)
Active
Application number
EP12164131.0A
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German (de)
English (en)
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EP2650081A1 (fr
Inventor
Oliver Hildebrandt
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.)
Supfina Grieshaber GmbH and Co KG
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Supfina Grieshaber GmbH and Co KG
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Filing date
Publication date
Application filed by Supfina Grieshaber GmbH and Co KG filed Critical Supfina Grieshaber GmbH and Co KG
Priority to EP12164131.0A priority Critical patent/EP2650081B1/fr
Priority to IN640DE2013 priority patent/IN2013DE00640A/en
Priority to CN201310116184.3A priority patent/CN103372791B/zh
Priority to KR1020130039846A priority patent/KR20130116191A/ko
Priority to BR102013008817-0A priority patent/BR102013008817B1/pt
Priority to US13/861,955 priority patent/US20140134925A1/en
Publication of EP2650081A1 publication Critical patent/EP2650081A1/fr
Application granted granted Critical
Publication of EP2650081B1 publication Critical patent/EP2650081B1/fr
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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
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/04—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes subjecting the grinding or polishing tools, the abrading or polishing medium or work to vibration, e.g. grinding with ultrasonic frequency
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/02—Machines or devices using grinding or polishing belts; Accessories therefor for grinding rotationally symmetrical surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B35/00—Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
    • 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

Definitions

  • the invention relates to a method for finishing a workpiece surface by means of a finishing tool, wherein the workpiece surface is moved relative to an active surface of the finishing tool in a rotational direction about a workpiece axis, wherein the relative movement of workpiece surface and effective surface is superimposed on an oscillating additional movement in a direction perpendicular to the workpiece surface direction ,
  • the SoFi Sonic Finish Ultrasonic Assisted Superfinishing project is a hybrid technology that combines a conventional finishing process with ultrasonic machining to fine-tune a workpiece, the conventional finishing process involves rotational movement of the workpiece relative to the finish tool, and a Low-frequency, oscillating relative movement of the workpiece and the finishing tool in a direction parallel to a rotation axis of the workpiece
  • the ultrasonic machining comprises a radial movement of the finishing tool relative to the workpiece, which oscillates at ultrasonic frequency.
  • the present invention has the object to provide an optimized method for finish machining a workpiece surface.
  • an oscillation frequency of the additional movement is lower than 1 kHz.
  • the active surface of the finishing tool is periodically in the direction of the machining workpiece surface and this opposite moves. This results in a "hammering" machining of the workpiece surface and an oscillation frequency corresponding change between a contact of the active surface and the workpiece surface with a higher pressure force and lower pressure force (which also "lifting" the effective surface of the workpiece surface is possible).
  • the movement of the active surface of the finishing tool takes place along an additional movement axis, which is oriented vertically relative to the workpiece surface to be machined.
  • the oscillation frequency of the additional movement is in the low-noise range. It is lower than 1 kHz.
  • the "hammering" machining of the workpiece surface has the advantage that the effective components of the active surface, ie the cutting grains, penetrate deeper into the material of the workpiece than is possible with a conventional finish machining. As a result, the removal rate or the removal rate is increased compared to a conventional finish machining.
  • the "hammering" machining of the workpiece surface has the further advantage that the active components of the active surface, ie the cutting grains, are briefly exposed to an increased pressure load. As a result, a splinter formation can be supported, whereby a self-sharpening effect arises, which in turn contributes to an increase in the material removal rate.
  • the additional movement according to the invention also goes with a periodic interruption of the cut or The chip formation and thus causes an interrupted cut structure.
  • continuous, groove-like depressions are created, which dissipate a coolant or lubricant used during workpiece surface processing.
  • the interruption of the ground structure has the consequence that a larger proportion of coolant or lubricant remains on the workpiece surface to be machined. This allows a better penetration of the effective surface of the finishing tool in the workpiece surface to be machined.
  • cooling lubricant can better get into the contact zone and eroded material can be better flushed or removed.
  • the kinetic energy introduced into the finishing tool as part of the additional movement promotes the cleaning of the finishing tool from abrasion embedded in or on the active surface. Overall, a significant improvement in the cutting behavior of the hot components of the finishing tool is achieved.
  • the periodic pressure contact of the active surface with the workpiece surface causes an increase in compressive residual stresses in near-surface portions of the workpiece, so that the fatigue strength of the workpiece (for example, a rolling bearing part or a crankshaft) can be increased.
  • the above-explained interruption of the ground structure has the advantage that a drainage effect can be significantly reduced in a finished workpiece.
  • the workpiece is a bearing ring.
  • a rolling of a rolling element on the bearing surface of the bearing ring then no longer causes the lubricant is displaced.
  • Corresponding advantages arise for hydrodynamic sliding bearings, in which a better whereabouts of the lubricant (especially oil) is ensured.
  • the oscillation frequency of the additional movement is higher than approximately 50 Hz, in particular higher than approximately 100 Hz.
  • an oscillation frequency range of between approximately 100 Hz and approximately 1 kHz is preferred, for example an oscillation frequency of 200 Hz.
  • An amplitude of the additional movement may be, for example, only 0.1 to 5 microns. However, in order to achieve a significant increase in a material removal rate, it is proposed that an amplitude of the additional movement (corresponding to half the stroke of the effective surface) is at least approximately 5 micrometers. This allows for a typical grain size of the finish material (about 10 microns) penetrate a grain with its entire extent in the material of the workpiece.
  • An amplitude of the additional movement may be, for example, 0.2 to several millimeters.
  • an amplitude of the additional movement is at most approximately 200 micrometers (an advantageous amplitude value is 50 micrometers). In this way it can also be prevented that the per se advantageous effects of the method according to the invention are not accompanied by a worsening of the macrogeometry of the workpiece to be machined.
  • An advantageous value for the amplitude of the additional movement is 100 micrometers.
  • the workpiece surface and the active surface are not moved relative to one another in a direction parallel to the workpiece axis.
  • a relative movement used in a conventional finishing method in a direction parallel to the workpiece axis is expressly dispensed with.
  • the relative movement of the workpiece surface and active surface is then based exclusively on the rotation of the workpiece surface about the workpiece axis and on the movement of the effective surface of the finishing tool in a direction perpendicular to the workpiece surface direction.
  • the workpiece surface and the active surface are reciprocated relative to each other in a direction parallel to the workpiece axis.
  • a conventional oscillation drive is provided.
  • Such an oscillation drive is advantageous for the realization of particularly high material removal rates.
  • a workpiece surface by means of the method according to the invention (ie with rotational movement of the workpiece and with additional movement perpendicular to the workpiece surface and possibly additionally with oscillation parallel to the workpiece axis) in order to achieve a high material removal rate and with the workpiece a basic structure and to provide increased compressive residual stresses.
  • the workpiece can then be further processed by means of a conventional finishing method (ie with rotational movement of the workpiece and without additional movement perpendicular to the workpiece surface and with oscillation movement parallel to the workpiece axis) in order to produce a particularly fine workpiece surface.
  • the oscillation frequency of the reciprocation in the direction parallel to the workpiece axis is at least about 1 Hz.
  • the oscillation frequency of the The reciprocating motion in the direction parallel to the workpiece axis is at most about 50 Hz.
  • preferred oscillation frequencies are between 1 and 21.67 Hz, preferably 5 Hz.
  • preferred oscillation frequencies are between 5 and 50 Hz, preferably 33.33 Hz.
  • the oscillation frequency of the additional movement by a factor of 1 to 1000, in particular by a factor of 6 to 40, higher than the oscillation frequency of the reciprocation in the direction parallel to the workpiece axis direction.
  • These frequency ratios result in an optimum combination of a high material removal rate, an increase in the compressive residual stress of near-surface workpiece layers and a reduced drainage effect compared to a conventional cross-cut structure.
  • an amplitude of a reciprocating movement in a direction parallel to the workpiece axis is between about 0.1 mm and about 3 mm. Such an amplitude range contributes to an increased material removal rate with simultaneously high dimensional accuracy of the workpiece to be machined.
  • a preferred amplitude for a finishing tool in the form of a finishing tape is 0.5 mm, for a finishing tool in the form of a finishing stone at least 0.5 mm, preferably 1 mm.
  • the amplitude of the additional movement by a factor of 5 to 600, in particular by a factor of 10 to 20 is smaller than the amplitude of the reciprocation in the direction parallel to the workpiece axis direction.
  • the amplitude of the additional movement is smaller by a factor of 1 to 5 than the amplitude of the reciprocating movement in the direction parallel to the workpiece axis.
  • factors are for example particularly well suited when a laterally limited workpiece surface (for example, the connecting rod bearing of a crankshaft) is to be processed, which is only minimally wider than the finishing tool.
  • even factors from 0.5 to 1 ratio of the amplitude of the additional movement to the amplitude of the reciprocation in the direction parallel to the workpiece axis
  • even smaller factors may be suitable.
  • the invention further relates to a device for finish machining a workpiece surface by means of a finishing tool, with a rotary drive device for generating a rotational movement of the workpiece surface relative to an active surface of the finishing tool in a rotational direction about a workpiece axis, wherein for superimposing the relative movement of the workpiece surface and effective surface an additional drive for generating a Is provided oscillating additional movement in a direction perpendicular to the workpiece surface direction.
  • the invention is based on the further object of specifying an optimized device for finishing a workpiece surface.
  • auxiliary drive is designed to generate an oscillation frequency which is lower than 1 kHz.
  • the additional drive comprises a piezoelectric actuator.
  • Such an actuator is particularly well suited for generating an oscillating movement of an effective surface of a finishing tool.
  • piezoelectric actuator instead of a piezoelectric actuator, other actuators may be used, for example, hydraulic, pneumatic or electric drives or drives based on magnetostriction.
  • piezoelectric actuator When using a piezoelectric actuator, it is preferred for a structurally simple design, if the piezoelectric actuator is aligned along an additional movement axis, in particular along the additional movement axis stacked piezoelectric elements comprises.
  • the piezoelectric actuator and the finishing tool are coupled to each other directly in motion, so that a movement of the piezoelectric actuator along the additional movement axis is identical to a movement of the Effective surface along the additional movement axis.
  • a movement of the piezoelectric actuator along the additional movement axis is identical to a movement of the Effective surface along the additional movement axis.
  • transmission devices for example levers, which translate a movement of the piezoactuator into a (preferably larger) movement of the effective surface of the finishing tool.
  • the piezoelectric actuator has a force transmission surface for transmitting a compressive force generated by the piezoelectric actuator to a force receiving surface of the finishing tool.
  • This allows a "plunger-like" transmission of forces directed towards the workpiece.
  • An oppositely directed movement of the finishing tool can be generated, for example, by an elastic re-deformation of a finishing tool holder or by additional springs.
  • finishing tool is designed in the form of a finishing stone.
  • the finishing tool is designed in the form of a finishing tape.
  • a pressing shell which has a transverse to the extending direction of the finishing strip effective pressing surface, wherein at least a part of the pressing surface is formed by a pressing portion which is movable along an additional movement axis relative to a stationary shell portion.
  • the pressing portion and the stationary shell portion are formed integrally with each other and connected to each other via a connecting portion, wherein the connecting portion is formed such that driving forces of the auxiliary drive cause movement of the pressing portion along the additional movement axis.
  • the connecting portion is formed such that driving forces of the auxiliary drive cause movement of the pressing portion along the additional movement axis.
  • an oscillating drive is provided for producing a relative reciprocating movement of the workpiece surface and the effective surface in a direction parallel to the workpiece axis.
  • an oscillation drive for generating a relative reciprocating movement of the workpiece surface and the effective surface in a direction parallel to the workpiece axis direction is expressly not provided.
  • FIG. 1 is a device for finishing a workpiece surface in total with the reference numeral 10th designated.
  • the device 10 comprises a machine frame 12 for setting up the device 10 on a footprint 14.
  • a workpiece holder 16 is provided for receiving a finish-machined workpiece 18.
  • the workpiece 18 has a central workpiece axis 20.
  • the workpiece 18 is, for example, a bearing ring.
  • the device 10 comprises a rotary drive device 22 for rotationally driving the workpiece 18 held on the workpiece holder 16 about the workpiece axis 20.
  • the workpiece axis 20 extends coaxially to the axis of rotation of the rotary drive device 22.
  • the workpiece 18 has a workpiece surface 24 extending in particular concentrically to the workpiece axis 20, which is machined finish with a finish tool 26 described below.
  • the finishing tool 26 is, for example, a finishing stone 28.
  • the finishing tool 26 is mounted on a finishing tool holder 30 and along an additional movement axis 32 (see FIG FIG. 2 ) is oscillatory drivable relative to the finishing tool holder 30.
  • an active surface 34 of the finishing tool 26 facing the workpiece surface 24 is moved in the direction of the workpiece surface 24 and opposite thereto.
  • the device 10 comprises an auxiliary drive 36, in particular in the form of a piezoelectric actuator 38.
  • the auxiliary drive 36 generates an oscillating movement of the active surface 34 along the additional movement axis 32.
  • a transmission element 40 is provided, which is connected to a clamping device 42.
  • the clamping device 42 includes, for example, a sleeve 44, which is subjected to a movement by the auxiliary drive 36 by means of the transmission element 40.
  • the sleeve 44 is slidably received along the additional movement axis 32 in a housing 46 of the finish tool holder 30.
  • the clamping device 42 further comprises a clamping element 48, which is connected by means of a screw connection with the sleeve 44, so that the finishing stone 28 can be clamped by means of clamping element 48 and sleeve 44.
  • the finishing tool holder 30 can be positioned relative to the frame 12 by means of a positioning device 50 along a positioning axis 52 (cf. FIG. 1 ).
  • the positioning axis 52 runs parallel to the workpiece axis 20.
  • the positioning device 50 comprises a holder 54 which can be moved on the frame 12 along an infeed axis 53 and on which a carriage 56 which is movably driven along the positioning axis 52 is mounted.
  • the carriage 56 and the finish tool holder 30 are connected to each other such that the finish tool holder 30 is positionable relative to the carriage 56 in a direction perpendicular to the workpiece axis 20.
  • a finishing tool guide 57 is provided, by means of which the finishing tool holder 30 can be positioned parallel to a feed axis 59. This allows wear compensation of the finishing tool 26 and a easy handling of the finishing tool 26 during assembly or tool changing operations.
  • the carriage 56 and the finish tool holder 30 may be connected to each other such that the finish tool holder 30 is not movable relative to the carriage 56 in the direction parallel to the workpiece axis 20.
  • the apparatus 10 comprises an oscillation drive 58 for generating a reciprocating movement of the tool holder 30 in a direction parallel to the workpiece axis 20.
  • the oscillation drive 58 has, for example, a known per se and therefore not explained in more detail eccentric 60, which is rotatably driven about an eccentric axis 62 and generates a double arrow 64 designated oscillatory motion of an output element 66.
  • the output member 66 is fixedly connected to the finish tool holder 30, so that an oscillating movement of the output member 66 is transmitted to the finish tool holder 30 and thus also to the finishing tool 26.
  • the clamping device 42 may be mounted by means of at least one linear roller guide in the housing 46.
  • the membrane element 68 preferably extends in a direction perpendicular to the additional movement axis 32 Direction.
  • the membrane element 68 is designed in the form of an annular disc, which is connected radially on the outside to the housing 46 and radially inward to the sleeve 44.
  • two membrane elements 68 are provided, which are arranged with respect to the additional movement axis 32 on opposite sides of the sleeve 44.
  • a relative movement between the workpiece surface 24 and active surface 34 consists of a rotational movement of the workpiece surface 24 about the workpiece axis 20 and one to the Workpiece axis 20 parallel oscillatory movement 64 of the active surface 34 together.
  • a characteristic for a conventional finishing process cross-cut structure 70 which in FIG. 6 is shown schematically.
  • the cross-cut structure 70 comprises a plurality of, in each case at least partially mutually substantially parallel, each continuous grooves 72 and hereby intersecting, also continuous grooves 74.
  • the patency of the grooves 72 and 74 causes the grooves 72 and 74 fluidly connected at intersection points 76 are. This results in a conventional finishing process, an increased drainage effect, in which coolant or lubricant is dissipated prematurely and therefore must be continuously provided in relatively large quantities again.
  • the surface structure 78 also includes grooves 80 and 82 that run at an angle to one another. However, the grooves 80 and 82 are not continuous, but have interruptions 84, so that separate groove sections 86 are formed.
  • the groove portions 86 serve as storage space for coolant and lubricant, which in contrast to the cross-cut structure 70 according to FIG. 6 not discharged prematurely. As a result, not only an improvement in the cooling and lubrication of the finishing tool 26 can be achieved, but in particular a reduction of the drainage effect of the workpiece surface 24 in use of the workpiece 18th
  • FIGS. 8 to 11 Further embodiments of devices 10 for finishing a workpiece surface 24 are shown. These devices 10 comprise a finishing tool 26 in the form of a finishing belt 88 (see FIG FIG. 10 ).
  • the device 10 serves to arrange an oscillation drive, indicated overall by the reference numeral 58, by means of which an oscillation movement of a workpiece holder 16 and a workpiece 18, indicated by a double arrow 64, can be generated.
  • This oscillatory movement is aligned parallel to a workpiece axis 20 of the workpiece 18.
  • the workpiece holder 16 is part of the rotary drive device 22, by means of which the workpiece 18 is rotatably driven about the workpiece axis 20.
  • the rotary drive device 22 comprises a headstock 90 and a tailstock 92. At the in FIG. 8 illustrated embodiment of the headstock 90 of the tailstock 92 are mounted on an output member 66 of the oscillation drive 58.
  • the devices 10 according to FIGS. 8 and 9 an identical structure. Therefore, the following description concerns both the device 10 according to FIG. 8 as well as the device 10 according to FIG. 9 ,
  • the workpiece surface 24 of the workpiece 18 to be machined is, for example, a connecting rod bearing surface of a crankshaft which is radially offset from the workpiece axis 20. As a result, such a workpiece surface 24 moves in a circular manner about the workpiece axis 20. It is therefore necessary that the finishing tool 26 can also follow this movement of the workpiece surface 24.
  • a bearing device 94 is provided for mounting on the frame 12, which has two degrees of freedom and which allows movement of the finishing tool 26 within a plane perpendicular to the workpiece axis 20.
  • the bearing device 94 comprises a pivoting part 96, which by means of a pivot bearing 98 about a pivot axis 100 pivotally mounted on a frame part 102 of the frame 12th is held.
  • the pivot axis 100 extends parallel to the workpiece axis 20.
  • the pivoting part 96 serves to arrange at least one linear guide 104 (cf. FIG. 10 ), by means of which a bearing part 106 along a guide axis 108 of the linear guide 104 is slidably mounted relative to the pivot member 96.
  • the bearing part 106 extends substantially within a plane perpendicular to the workpiece axis 20 extending plane.
  • the bearing part 106 has an opening 108 which is penetrated by the pivot bearing 98.
  • the bearing part 106 has a bearing part end 110 facing the workpiece 18 for the arrangement of a pressing device 112.
  • the pressing device 112 includes at least two forceps arms 114.
  • the forceps arms 114 are relative to the bearing portion 106 about Zangenarmschwenkachsen 116 (see FIG. 10 ) pivotable.
  • the Zangenarmschwenkachsen 116 parallel to the pivot axis 100 of the pivoting part 96th
  • the pliers arms 114 have, at their end facing the workpiece 18, a unit 118 which will be described below with reference to FIG FIG. 11 will be explained in more detail.
  • Andrückantrieb 119 is provided, which the units 118 of the gun arms 114th acted upon in the direction of the workpiece 18 forces 120 acting.
  • the units 118 have a holder 122 which is fixedly connected to the tong arms 114 and which serves to provide a clamping device for the finishing belt 88.
  • the device 10 includes an auxiliary drive 36 in the form of a piezoelectric actuator 38.
  • the piezoelectric actuator 38 has a plurality of piezo elements stacked on top of the additional movement axis 32 ("stack").
  • the auxiliary drive 36 is connected to a drive housing 126 fixed to the gun arm 114.
  • On a front side 128 of the piezoelectric actuator 38 is connected to a power transmission element 130.
  • This has a force transmission surface 132, which transmits a pressure force generated by means of the piezoelectric actuator 38 to a force receiving surface 134 of an output element 136.
  • the force transmission surface 132 and the force receiving surface 134 may also be firmly connected to each other, so that tensile forces of the piezoelectric actuator 38 to the output member 136 are transferable.
  • the units 118 each comprise a pressing shell 138, which each have a curved pressing surface 140.
  • the pressing shells 138 comprise a stationary shell section 142, which is firmly connected to the tong arm 114, for example by means of a screw connection 144.
  • the stationary shell portion 142 serves to arrange a pressing portion 146 which is movable relative to the stationary shell portion 142, along the additional movement axis 32.
  • the pressing portion 146 has a curved surface 148, which forms part of the pressing surface 140 (the other part of the pressing surface 140 is formed by the stationary shell portion 142).
  • the pressing portion 146 is integrally formed with the stationary shell portion 142 and connected thereto via at least one connecting portion 150.
  • the connecting portion 150 is formed in the form of a thin web 152, which extends transversely, in particular perpendicularly, to the additional movement axis 32.
  • the pressing portion 146 is fixedly connected to the output element 136, so that an expansion of the piezoelectric actuator 38 acts on the force receiving surface 134 via the force transmission surface 132 and is transmitted by the output element 136 directly into a movement of the Andrückabitess 146 and thus the curved surface 148.
  • the curved surface 148 formed by the pressing portion 146 is comparatively short in the extending direction of the finishing tape 88, so that the curved surface 148 is smaller than half of the entire pressing surface 140.
  • the pressing portion 146 is enlarged so that the curved surface 148 formed by the pressing portion 146 is larger than half of the secured pressing surface 140.
  • the peculiarity of in FIG. 13 shown Andrückschale 138 is that the Connecting portion 150 in the form of a thin-walled web with a surface 154 also forms part of the pressing surface 140.
  • the pressing surface 140 is thus composed of a curved surface 148, which is formed by the connecting portion 146, at least one partial surface 154, which is formed by one or more of the connecting portions 152 and optionally from an additional partial surface 156, which of the stationary shell portion 142nd is formed.
  • the entire pressing surface 140 may be formed by the pressing portion 146; this is in FIG. 14 shown.
  • the pressing surface 140 is also completely formed by the curved surface 148 of the Andschreibabitess 146.
  • the stationary shell section 142 has arms 158, which are provided at their free end with pressure elements 160, for example in the form of pressure rollers.
  • the pressing elements 160 serve to support the workpiece 18, so that the workpiece surface 24 to be machined can be positioned exactly relative to the pressing surface 140.
  • the pressing elements 160 substantially transverse to the direction of the forces 120 act as in the embodiment according to FIG. 16 the case is.
  • FIGS. 17 to 19 Embodiments of devices 10 for finishing a workpiece surface 24 are shown in which an additional movement axis 32 is not perpendicular to a workpiece surface to be machined 24, but parallel thereto (see FIG. 17 ) or tangentially thereto (cf. FIG. 18 ).
  • a rotational movement of a workpiece 18 about the workpiece axis 20 is superimposed on an additional movement of the active surface 34 of the finishing tool 26 in parallel to the workpiece axis 20, as shown in FIG FIG. 17 is indicated with a small double arrow 162.
  • the additional movement 162 is generated, for example, by a piezoelectric actuator 38, which displaces a finishing stone holder 30 and thus a finishing stone 28 into the oscillating additional movement 162.
  • the additional movement 162 can also be superimposed on a conventional oscillatory movement, which is generated by means of a conventional oscillation drive (in FIG FIG. 17 indicated by a larger double arrow 64).
  • an additional drive 36 may be provided in the form of a piezoelectric actuator, which drives a finish stone holder 30 with a movement along the additional movement axis 32 movement.
  • a conventional oscillating movement may be provided parallel to the workpiece axis 20 (see double arrow 64 in FIG FIG. 19 ).
  • a line of action 168 can be generated, which in its coarse course likewise orients itself on the line of action 164, but has shaft sections extending substantially perpendicular to the line of action 164.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Claims (17)

  1. Procédé de finition d'une surface de pièce (24) au moyen d'un outil de finition (26), ladite surface de pièce (24) étant déplacée par rapport à une surface active (34) de l'outil de finition (26) dans un sens de rotation autour d'un axe de pièce (20), au mouvement relatif de la surface de pièce (24) et de la surface active (34) étant superposé un mouvement supplémentaire oscillant dans une direction perpendiculaire à la surface de pièce (24), caractérisé par le fait qu'une fréquence d'oscillation du mouvement supplémentaire est inférieure à 1 kHz.
  2. Procédé selon l'une quelconque des revendications précédentes, caractérisé par le fait que la fréquence d'oscillation du mouvement supplémentaire est supérieure à 50 Hz, en particulier supérieure à 100 Hz.
  3. Procédé selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'une amplitude du mouvement supplémentaire est d'au moins 5 micromètres à peu près.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé par le fait qu'une amplitude du mouvement supplémentaire est d'environ 200 micromètres tout au plus.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé par le fait que la surface de pièce (24) et la surface active (34) ne sont pas déplacées l'une par rapport à l'autre dans une direction parallèle à l'axe de pièce (20).
  6. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que la surface de pièce (24) et la surface active (34) sont animées d'un mouvement de va-et-vient l'une par rapport à l'autre dans une direction parallèle à l'axe de pièce (20).
  7. Procédé selon la revendication 6, caractérisé par le fait que la fréquence d'oscillation du mouvement de va-et-vient dans la direction parallèle à l'axe de pièce (20) est d'au moins 1 Hz à peu près.
  8. Procédé selon la revendication 6 ou 7, caractérisé par le fait que la fréquence d'oscillation du mouvement de va-et-vient dans la direction parallèle à l'axe de pièce (20) est d'environ 50 Hz tout au plus.
  9. Procédé selon l'une quelconque des revendications 6 à 8, caractérisé par le fait que la fréquence d'oscillation du mouvement supplémentaire est supérieure d'un facteur compris entre 1 et 1000, en particulier d'un facteur compris entre 6 et 40, à la fréquence d'oscillation du mouvement de va-et-vient dans la direction parallèle à l'axe de pièce (20).
  10. Procédé selon l'une quelconque des revendications 6 à 9, caractérisé par le fait qu'une amplitude du mouvement de va-et-vient dans la direction parallèle à l'axe de pièce (20) est comprise entre environ 0,1 mm et environ 3 mm.
  11. Procédé selon l'une quelconque des revendications 6 à 10, caractérisé par le fait que l'amplitude du mouvement supplémentaire est inférieure d'un facteur compris entre 5 et 600, en particulier d'un facteur compris entre 10 et 20, à l'amplitude du mouvement de va-et-vient dans la direction parallèle à l'axe de pièce (20).
  12. Dispositif (10) de finition d'une surface de pièce (24) au moyen d'un outil de finition (26), comprenant un dispositif d'entraînement en rotation (22) destiné à générer un mouvement rotatif de la surface de pièce (24) par rapport à une surface active de l'outil de finition (26) dans un sens de rotation autour d'un axe de pièce (20), un entraînement supplémentaire (36) destiné à générer un mouvement supplémentaire oscillant dans une direction perpendiculaire à la surface de pièce (24) étant prévu pour superposer le mouvement relatif de la surface de pièce (24) et de la surface active (34), caractérisé par le fait que ledit entraînement supplémentaire (36) est conçu pour générer une fréquence d'oscillation qui est inférieure à 1 kHz.
  13. Dispositif (10) selon la revendication 12, caractérisé par le fait que ledit entraînement supplémentaire (36) comprend un actionneur piézoélectrique (38).
  14. Dispositif (10) selon la revendication 13, caractérisé par le fait que ledit actionneur piézoélectrique (38) est orienté suivant un axe de mouvement supplémentaire (32), en particulier comprend des éléments piézoélectriques empilés suivant l'axe de mouvement supplémentaire (32).
  15. Dispositif (10) selon l'une quelconque des revendications 12 à 14, caractérisé par le fait que ledit outil de finition (26) est réalisé sous forme d'une pierre de finition (28).
  16. Dispositif (10) selon l'une quelconque des revendications 12 à 14, caractérisé par le fait que ledit outil de finition (26) est réalisé sous forme d'une bande de finition (88) et que, pour plaquer ladite bande de finition (88) contre la surface de pièce (24), une coque de pression (138) est prévue qui présente une surface de pression (140) active transversalement à la direction d'extension de ladite bande de finition (88), au moins une partie de la surface de pression (140) étant formée par une portion de pression (146) qui est déplaçable, suivant un axe de mouvement supplémentaire (32), par rapport à une portion de coque (142) stationnaire.
  17. Dispositif (10) selon la revendication 16, caractérisé par le fait que ladite portion de pression (146) et ladite portion de coque (142) stationnaire sont réalisées d'un seul tenant l'une avec l'autre et sont reliées entre elles par une portion de liaison (150), ladite portion de liaison (150) étant réalisée de manière à ce que des forces d'entraînement de l'entraînement supplémentaire (36) provoquent un mouvement de la portion de pression (146) suivant ledit axe de mouvement supplémentaire (32).
EP12164131.0A 2012-04-13 2012-04-13 Procédé et dispositif de finition d'une surface de pièce usinée Active EP2650081B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP12164131.0A EP2650081B1 (fr) 2012-04-13 2012-04-13 Procédé et dispositif de finition d'une surface de pièce usinée
IN640DE2013 IN2013DE00640A (fr) 2012-04-13 2013-03-05
CN201310116184.3A CN103372791B (zh) 2012-04-13 2013-04-03 用于精加工工件表面的方法和装置
KR1020130039846A KR20130116191A (ko) 2012-04-13 2013-04-11 작업편 표면의 마감 가공을 위한 방법 및 장치
BR102013008817-0A BR102013008817B1 (pt) 2012-04-13 2013-04-11 Processo e dispositivo para trabalho de acabamento de uma superfície de peça a trabalhar
US13/861,955 US20140134925A1 (en) 2012-04-13 2013-04-12 Method and device for finishing a workpiece surface

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EP12164131.0A EP2650081B1 (fr) 2012-04-13 2012-04-13 Procédé et dispositif de finition d'une surface de pièce usinée

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EP (1) EP2650081B1 (fr)
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BR (1) BR102013008817B1 (fr)
IN (1) IN2013DE00640A (fr)

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DE102016107762B3 (de) * 2016-04-27 2017-10-12 Supfina Grieshaber Gmbh & Co. Kg Finishvorrichtung und Verfahren zum Betrieb einer Finishvorrichtung

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EP3411181B1 (fr) * 2016-02-01 2023-04-19 IMPCO Microfinishing Appareil et procédé de micro-finition à tourillon à semelle étroite
CN106737120B (zh) * 2017-01-15 2020-01-07 广州东荣轴承设备有限公司 一种超精研磨迭加高频振荡装置
CN107520471A (zh) * 2017-09-25 2017-12-29 华侨大学 超声打孔机工具头在线电火花修整装置
EP3536451A1 (fr) * 2018-03-07 2019-09-11 Horst Knäbel Procédé et dispositif d'amélioration de la coaxialité et de la capacité de charge d'un raccordement conique comportant un logement sous la forme d'anneau fermé et un manchon pouvant être élargi ou comprimé
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DE102016107762B3 (de) * 2016-04-27 2017-10-12 Supfina Grieshaber Gmbh & Co. Kg Finishvorrichtung und Verfahren zum Betrieb einer Finishvorrichtung

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IN2013DE00640A (fr) 2015-06-26
BR102013008817B1 (pt) 2022-01-11
EP2650081A1 (fr) 2013-10-16
BR102013008817A2 (pt) 2015-06-23
KR20130116191A (ko) 2013-10-23
US20140134925A1 (en) 2014-05-15
CN103372791B (zh) 2018-03-13
CN103372791A (zh) 2013-10-30

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