EP1475185B1 - Méthode et dispositif pour abraser des pièces à symétrie de révolution - Google Patents

Méthode et dispositif pour abraser des pièces à symétrie de révolution Download PDF

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Publication number
EP1475185B1
EP1475185B1 EP03405323A EP03405323A EP1475185B1 EP 1475185 B1 EP1475185 B1 EP 1475185B1 EP 03405323 A EP03405323 A EP 03405323A EP 03405323 A EP03405323 A EP 03405323A EP 1475185 B1 EP1475185 B1 EP 1475185B1
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EP
European Patent Office
Prior art keywords
workpiece
abrasive
tool
axis
linear guide
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.)
Expired - Lifetime
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EP03405323A
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German (de)
English (en)
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EP1475185A1 (fr
Inventor
Jean-Claude Montandon
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HTT Hauser Tripet Tschudin AG
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HTT Hauser Tripet Tschudin AG
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Publication date
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Priority to EP03405323A priority Critical patent/EP1475185B1/fr
Priority to DE50301227T priority patent/DE50301227D1/de
Priority to AT03405323T priority patent/ATE304915T1/de
Priority to EP03405603A priority patent/EP1475186B1/fr
Priority to DE50301228T priority patent/DE50301228D1/de
Priority to AT03405603T priority patent/ATE304916T1/de
Publication of EP1475185A1 publication Critical patent/EP1475185A1/fr
Application granted granted Critical
Publication of EP1475185B1 publication Critical patent/EP1475185B1/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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0076—Other grinding machines or devices grinding machines comprising two or more grinding tools
    • 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
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/14—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding conical surfaces, e.g. of centres
    • 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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor

Definitions

  • the invention relates to a method for abrasive round machining of a workpiece and to an apparatus for carrying out the abrasive round machining method according to the preambles of the independent claims.
  • workpieces are required which are at least partially rotationally symmetrical and have a workpiece axis defining the axis of symmetry and two adjacent surfaces which are rotationally symmetrical with respect to the workpiece axis and between which a circular transitional edge is formed.
  • Such workpieces are e.g. used as valve or nozzle needles, typically one of the two surfaces forms a sealing seat and the other of the two surfaces forms a guide surface of the valve or nozzle needle.
  • valve or nozzle needles also for high pressure applications such.
  • Fuel injection systems are suitable for modern gasoline or diesel engines, where partial pressures of well over 1000 bar must be mastered, high demands are to be met in terms of compliance with manufacturing tolerances.
  • the transition edge between the seat and the guide surface must be formed as sharp as possible and burr-free.
  • chip-forming methods with geometrically indefinite cutting edges are used, in particular grinding and honing.
  • a method for abrasive round machining can thus be used e.g. a cylindrical grinding method or a round honing method. Accordingly, both a cylindrical grinding machine and a round honing machine can be regarded as a device for carrying out an abrasive round machining process.
  • a grinding method and a grinding machine are known, which allow the production of a valve needle for a fuel injection valve by means of cylindrical grinding.
  • the grinding machine is provided with a grinding wheel and a deburring mandrel arranged in relation to the workpiece in relation to the grinding wheel.
  • a burr is formed which extends beyond the transition edge formed between this grinding surface and an adjacent surface into the region of the adjacent one Projecting surface.
  • the deburring mandrel is arranged and formed in such a way that the burr, due to the rotation of the workpiece rotating about its axis, is pressed back on the grinding surface by the deburring mandrel and ground on the next contact with the grinding wheel.
  • the object of the invention is to provide a method and a device for abrasive round machining, which allow reliable and precise machining of workpieces with a sharp and burr-free transition edge between two rotationally symmetric surfaces in large-scale production.
  • an abrasive round machining process is carried out for machining a workpiece having a workpiece axis.
  • the workpiece rotates about the workpiece axis, while at the same time a first abrasive tool (in particular a grinding tool or a honing tool), which rotates about a first tool axis, and the workpiece are opposed to each other in a first Abrasivvorgang (in particular a Grinding or honing process) to process a first workpiece surface.
  • a first abrasive tool in particular a grinding tool or a honing tool
  • the inventive machining method is characterized in that a second abrasive tool (in particular a grinding tool or a honing tool), which rotates about a second tool axis, is delivered against the workpiece in order to process a second workpiece surface in a second abrasive process.
  • the two workpiece surfaces are rotationally symmetrical with respect to the workpiece axis and to each other arranged so adjacent that between them a sharp, burr-free, circular transition edge is formed.
  • the two abrasive processes are controlled so that they are terminated at the same time.
  • any burr formed by the second abrasive tool in abrasive machining of the second workpiece surface which projects beyond the transition edge into the region of the first workpiece surface and thus into the region machined by the first abrasive tool will be within less than a full revolution of the workpiece abraded on the next contact with the first abrasive tool.
  • any burr formation on the transition edge is effectively prevented from the outset.
  • any simultaneous burrs on the transition edge which were previously formed during a non-random abrasive machining of the workpiece surfaces, are also ground off during the simultaneous abrasive machining of the two workpiece surfaces.
  • the workpiece For carrying out the first abrasive operation according to the method according to the invention, it is possible for the workpiece to be rotated about a workpiece axis stationary during the first abrasive operation and for the first abrasive tool to be delivered against the workpiece.
  • Such abrasive operations are typically carried out on cylindrical grinding machines in which an elongate workpiece is received between a workpiece spindle mounted on a headstock stationary during the first abrasive operation and a sleeve disposed on a tailstock stationary during the first grinding operation.
  • the workpiece rotating about the workpiece axis it is also possible for the workpiece rotating about the workpiece axis to be delivered against a first abrasive tool rotating about a first tool axis stationary during the first grinding operation.
  • Such Abrasivvorerie are usually performed by cylindrical grinding machines, which are designed for centerless cylindrical grinding (ie for cylindrical grinding without quill). In principle, it is also possible that during the execution of the first Abrasovvorgangs both the first abrasive tool and the Wekr thoroughlyachse (or a workpiece axis defining Wekr spaspindel) are moved simultaneously.
  • the machining method according to the invention has the further advantage that the two adjacent workpiece surfaces between which the transition edge is formed are machined at least partially simultaneously (ie simultaneously), whereby the machining time for the production of the workpiece considerably shortened. This is a considerable advantage, in particular for the large-scale production of workpieces.
  • both Abrasiwor sau are performed only time-controlled.
  • both abrasive operations are carried out in each case during the periods of time specified in advance, so that a respective removal corresponding to the respective period of time is removed by machining for the two surfaces.
  • the starting times for the two abrasive operations can be set offset by the time difference between the time periods required for the two abrasion operations.
  • the two Abrasivvor réelle are then started at the offset by this time difference start times, so that after the completion of the two Abrasivvor réelle these are terminated at the same time.
  • the measurement-controlled execution of an abrasion process means that the workpiece surface processed in an abrasive process is measured during the execution of the abrasive process and the abrasive process is terminated as soon as a desired desired dimension is reached.
  • a first estimated value of the time required for the completion of the measurement-controlled abrasive process is determined.
  • This estimate is then used for a completion value comparing the time required for the other abrasive operation to determine the time difference between the estimated scan completion completion value and the completion time of the other abrasive operation. If the other abrasion process is a time-controlled process, the time value can be determined on the basis of the time already spent for this abrasion process. On the other hand, if the other abrasive process is also a measurement-controlled process, then the time value can be estimated analogously to the estimated value for the first measurement-controlled process. Subsequently, that Abrasivvorgang for which a shorter time has been determined until the completion of the process, according to the time difference is delayed. The determination of the time difference and the subsequent deceleration of the one abrasive process can be carried out several times during the implementation of the method according to the invention in order to increase the time precision for the simultaneous termination of the two abrasive operations.
  • one of the two machined workpiece surfaces is conical, while the other machined workpiece surface can be either conical or cylindrical.
  • the inventive method is particularly well suited for external cylindrical grinding, i. for cylindrical grinding of a workpiece whose one workpiece surface to be machined is outside-conically shaped and whose other workpiece surface to be machined is also designed to be either externally conical or cylindrical.
  • external cylindrical grinding grinding wheels are typically used whose diameters are substantially larger than the diameter of the workpiece in the area to be ground. In this case, the advantage is particularly great, since the burr formation when using relatively large grinding wheels is a significant problem.
  • the method according to the invention is also suitable for combined external and internal cylindrical grinding (ie for grinding an internally conical workpiece surface and an adjacent further workpiece surface which is either external or cylindrical) or even for internal cylindrical grinding of two applicable adjacent conical workpiece surfaces.
  • grinding wheels with a comparatively small diameter are used for grinding the inner conical workpiece surfaces.
  • An abrasive device designed for carrying out the method according to the invention for the abrasive round machining of a workpiece may in particular be a grinding machine or honing machine which comprises a workpiece spindle rotating about a workpiece spindle axis, which is provided with a workpiece holder designed to receive the workpiece.
  • the abrasive device further comprises a first abrasive tool rotating about a first tool axis and a first feed device for delivering the first abrasive tool and the workpiece against each other.
  • the first feed device is designed such that either the first abrasive tool against the workpiece or the workpiece together with the workpiece spindle against the first abrasive tool can be delivered by means of the first feed device.
  • both the first abrasive tool and the workpiece, together with the workpiece spindle, can be moved relative to a stationary base in order to deliver the first abrasive tool and the workpiece to one another.
  • the inventive abrasive device further comprises a second abrasive tool rotating about a second tool axis, a second feed device configured to feed the second abrasive tool against the workpiece, and a control device for controlling the abrasive device.
  • the control device is designed to control the first feed device such that by means of the first feed device, the first abrasive tool and the workpiece are delivered against each other to edit a first workpiece surface in a first abrasive.
  • the control device is further designed to control the second feed device such that the second abrasive tool is delivered by the second feed device against the workpiece to edit a second workpiece surface in a second abrasive, wherein the two workpiece surfaces with respect to the workpiece spindle axis rotationally symmetrical and adjacent to each other are arranged, that between them a circular transition edge is formed.
  • the Control device for controlling the two feed devices is designed such that the two Abrasivvorêt be terminated at the same time.
  • the first feed device can comprise a first carriage, by means of which either the workpiece together with the workpiece spindle or the first abrasive tool can be moved along a first straight linear guide obliquely or at right angles to the workpiece spindle axis in order to deliver the first abrasive tool and the workpiece against each other.
  • a straight line puncture In the case of a rectangular infeed of the first abrasive tool against the workpiece this is referred to as a straight line puncture, in the case of a deviating from a right angle delivery as a bevel.
  • the first delivery device can also comprise other suitable delivery means, e.g. a pivotable about a pivot axis platform.
  • a further translatory movement axis between the first abrasive tool and the Wekr Swissspindel be provided to allow between the workpiece and the first abrasive tool a plane relative movement with two translational degrees of freedom.
  • the second feed device comprises a second carriage, by means of which the second abrasive tool along a second linear linear guide obliquely or perpendicular to the workpiece spindle axis is movable, wherein the second linear guide is arranged such that the second abrasive tool of a relative to the Workpiece the first abrasive tool opposite side against the workpiece is deliverable.
  • the second delivery device can also be arranged in the manner of a bevel or in the manner of a straight cut.
  • the second linear guide comprises at least two elongate guide elements guiding the second carriage and defining the direction of travel of the second carriage, which define two parallel geometric axes.
  • the guide elements can be eg rails or guide rods.
  • the guide elements are arranged such that the (geometric) workpiece spindle axis passes between the axes defined by the guide elements.
  • the arrangement of the guide elements such that the axes defined by these extend on both sides of the workpiece spindle axis, ensures a high rigidity of Abrasivvorichtuhg for workpiece machining by means of the second abrasive tool and thereby high precision in machining.
  • the guide elements of the second feed device are even arranged such that the workpiece spindle axis even passes between the guide elements themselves, not just between their extensions.
  • a particularly high rigidity of the abrasive device is achieved.
  • the second delivery device may in turn comprise other suitable delivery means, e.g. a pivotable about a pivot axis platform.
  • the second abrasive tool may in particular be a grinding wheel.
  • the abrading device then preferably further comprises a dressing tool for dressing the grinding wheel.
  • the dressing tool can be arranged on the side opposite the workpiece spindle axis side of the grinding wheel such that the grinding wheel by means of the second carriage is selectively movable either against the workpiece or against the dressing tool.
  • the second feed device comprises a third carriage, by means of which the second abrasive tool along a third straight linear guide is movable parallel to the workpiece spindle axis.
  • the third linear guide comprises at least three elongate guide elements guiding the third carriage and defining the direction of travel of the third carriage, each defining a geometrical axis parallel to one another.
  • the guide elements may be, for example, rails or guide rods.
  • the guide elements are arranged such that the workpiece spindle axis is within a space bounded by an imaginary envelope (i.e., an envelope in the geometric sense) about the at least three infinitely long axes of the third linear guide.
  • the guide elements of the third linear guide are arranged such that the workpiece spindle axis penetrates a polygon lying in a plane normal to the workpiece spindle axis and whose corners are defined by the axes of the third linear guide associated with the guide elements.
  • the second feed device comprises both a second carriage which can be moved obliquely or at right angles to the workpiece spindle axis along the second linear guide and a third carriage which is movable parallel to the workpiece spindle axis along the third linear guide
  • the second carriage is preferably arranged movably on the third carriage by means of the second linear guide, so that the second carriage is arranged downstream of the third carriage in the sense of a serial kinematics.
  • a comparatively simple and rigid construction of the second delivery device is obtained.
  • the reverse serial kinematic arrangement is also possible for certain applications, i. the arrangement of the carriages such that the third carriage is movably arranged on the second carriage by means of the third linear guide.
  • the abrasive device may further include a tailstock provided with a quill for stabilizing a longitudinal end of the workpiece during workpiece machining.
  • the second feed device is preferably arranged on the tailstock.
  • the third Linear guide advantageously arranged on the tailstock.
  • the third carriage is then movable relative to the tailstock along the third linear guide.
  • the sleeve is connected in such a manner by a passage formed in the third carriage through leading arrangement with the tailstock such that the third carriage is movable independently of the quill along the quill.
  • the sleeve can in turn be provided with an adjusting device, which is designed for adjusting or moving the quill with respect to the tailstock parallel to the workpiece spindle axis. The third carriage and quill are then moved independently of each other parallel to the workpiece spindle axis with respect to the tailstock.
  • an external cylindrical grinding machine 10 which has a stable stationary machine bed (not shown).
  • a straight linear guide (not shown) is arranged, which is referred to below as the fourth linear guide.
  • a carriage (not shown), hereinafter referred to as fourth carriage, is linearly movable on the fourth linear guide, as indicated by the double arrow 62 in the figures.
  • a workpiece headstock (not shown) is fixed, in which a workpiece spindle 12 is rotatably mounted about a substantially horizontal workpiece spindle axis 14, wherein the workpiece spindle axis 14 extends parallel to the direction of movement of the fourth carriage on the fourth linear guide.
  • a workpiece clamping device 16 is arranged, in which a longitudinal end of an elongate workpiece 18 is clamped.
  • the workpiece spindle 12 is driven by a motor (not shown) such that it rotates about the workpiece spindle axis 14 during grinding with a number of turns of approximately 800 rpm.
  • a carriage (not shown), hereinafter referred to as the first carriage, can be moved obliquely to the workpiece spindle axis 14 along the first linear guide.
  • the first carriage carries the main spindle (not shown) of the external cylindrical grinding machine 10, wherein in the main spindle a main grinding wheel 20 designated first grinding wheel 20 about a first substantially horizontal tool axis (not shown) is rotatably mounted.
  • the first carriage and the first linear guide are part of a first feed device, which serves to deliver the first grinding wheel 20 against the workpiece 18 and to drive away from it again, as indicated in the figures by the double arrow 22:
  • the first grinding wheel 20 is designed to grind a cylindrical surface of the workpiece 18, the workpiece 18 having a diameter of approximately 4 mm in the region of this cylindrical surface.
  • the first grinding wheel 20 has a pulley diameter of approximately 500 mm and is driven by a motor (not shown) to rotate about the first tool axis during a grinding operation with a turning number of approximately 1750 rpm.
  • a tailstock 30 is fixedly mounted on the fourth carriage relative to the workpiece headstock.
  • a quill 32 Arranged on the end face of the tailstock 30 facing the workpiece headstock is a quill 32 projecting in the direction of the workpiece headstock, this quill being movable parallel to the workpiece spindle axis 14 by means of a hydraulic drive with respect to the tailstock 30.
  • the workpiece spindle 12 and the sleeve 32 are arranged such that the workpiece 18 clamped at one longitudinal end in the workpiece clamping device 16 is received between the workpiece spindle 12 and the sleeve 32, stabilizing it during rotation about the workpiece spindle axis 14 at the other longitudinal end of the pinole tip becomes.
  • the tailstock 30, the workpiece headstock and the movable on the first linear guide main spindle with respect to each other are arranged such that the main grinding wheel 20 can be fed by means of the first feed device between the workpiece spindle 12 and the Pinolenspitze against the workpiece 18.
  • the tailstock 30 On the tailstock 30 four straight guide rods 34, 36, 38, 40 are arranged, which are each arranged parallel to the workpiece spindle axis 14 and project from the workpiece headstock facing end side of the tailstock 30 in the direction of the workpiece headstock.
  • the four guide rods 34, 36, 38, 40 are part of a further straight linear guide, which is referred to below as the third linear guide.
  • another carriage 42 hereinafter referred to as the third carriage 42, arranged, which is provided with four guide bushes, through which the four guide rods 34, 36, 38, 40 of the third linear guide pass.
  • the third carriage 42 is in one area between the tailstock 30 and the workpiece headstock along the third linear guide parallel to the workpiece spindle axis 14 with respect to the tailstock 30 movable, as indicated by the double arrow 44 in Figures 1-3.
  • the four guide rods 34, 36, 38, 40 of the third linear guide are arranged such that they form the corners of a rectangle which approximately corresponds to the cross section of the tailstock 30. Further, the four guide rods 34, 36, 38, 40 are arranged with respect to the workpiece spindle axis 14 such that the workpiece spindle axis 14 passes through the rectangle formed by the four guide rods 34, 36, 38, 40 of the third linear guide.
  • two straight guide rods 46, 48 are arranged, which each extend transversely to the workpiece spindle axis 14 and substantially horizontally. These two guide rods 46, 48 are part of a further straight linear guide, which is referred to below as a second linear guide.
  • a further carriage 50 hereinafter referred to as a second carriage 50, arranged, which is provided with two guide bushes, through which the two guide rods 46, 48 of the second linear guide pass.
  • the second carriage 50 is movable in a region between the third carriage 42 and the workpiece headstock along the second linear guide transversely to the workpiece spindle axis 14 and substantially horizontally with respect to the third carriage 42, as indicated by the double arrow 52 in the figures.
  • the guide rods 46, 48 of the second linear guide are arranged substantially vertically one above the other on the third carriage 42 in such a way that the pinole passage formed in the third slide 42 (and thus the sleeve which is substantially coaxial therewith) Work spindle axis 14) leads approximately halfway between the two guide rods 46, 48 of the second linear guide passes.
  • a second grinding wheel 54 On the front side of the second carriage 50, which is remote from the third carriage 42 and faces the workpiece headstock, there is arranged a second grinding wheel 54, which is rotatably mounted relative to the second carriage 50 about a second tool axis 56 arranged substantially horizontally and parallel to the workpiece spindle axis 14 ,
  • the second carriage 50 and the third carriage 42 and the second and the third linear guide are part of a second feed device, which serves to deliver the second grinding wheel 54 in the manner of a cross slide in a substantially horizontal plane against the workpiece 18 and back away from him to drive.
  • the second feed device is designed and arranged such that the second grinding wheel 54 is arranged on the side of the workpiece 18 opposite the workpiece spindle axis 14 or the workpiece 18 of the first grinding wheel 20 and can be fed against the workpiece 18 and again from this side from this way is mobile.
  • the second grinding wheel 54 is configured to grind an external surface of the workpiece 18, this external work surface being adjacent to the cylindrical workpiece surface ground by the first grinding wheel 20 such that a sharp circular transition edge is formed therebetween.
  • the second grinding wheel 54 has a pulley diameter of approximately 100 mm and is driven by a motor (not shown) to rotate about the second tool axis 56 during a number of revolutions of approximately 6000 rpm.
  • a dressing unit is further arranged, which comprises a about a vertical pivot axis with respect to the tailstock 30 pivotally adjustable Abrichtspindelstock 58, in which a Abrichtspindel is mounted, which is rotatable about a substantially horizontal Abrichtspindelachse.
  • a dressing wheel 60 is arranged, which is designed for dressing the second grinding wheel 54.
  • the dressing unit is on the opposite side of the workpiece spindle axis 14 second grinding wheel 54 arranged such that the second grinding wheel 54 by means of the second carriage 50 is selectively movable either against the workpiece 18 or against the dressing wheel 60.
  • the grinding wheel 54 can also be moved with two translatory degrees of freedom in a plane with respect to the dressing wheel 60 and / or the workpiece 18 by simultaneously moving the second carriage 50 and the third carriage 42 along their associated linear guides (also as interpolating movement or movement). Method of grinding wheel 54).
  • the external cylindrical grinding machine 10 is shown in a working position in which both the first grinding wheel 20 and the second grinding wheel 54 are delivered against the workpiece 18 and the workpiece 18 is simultaneously ground by the two grinding wheels 20, 54.
  • FIG. 3 does not show the first grinding wheel 20 and the workpiece headstock.
  • the external cylindrical grinding machine 10 is shown in a working position in which the second grinding wheel 54 is moved away from the workpiece 18 towards the dressing wheel 60 along the second linear guide and in which the first grinding wheel 20 has moved away from the workpiece 18.
  • the external cylindrical grinding machine 10 shown in FIGS. 1-3 comprises a first measuring device (not shown) arranged on the fourth carriage and designed for measuring the removal of the workpiece 18 caused during grinding by the first grinding wheel 20, one arranged on the fourth carriage second measuring means (not shown) adapted to measure the abrasion of the workpiece 18 caused by grinding with the second grinding wheel 54; and control means (not shown) adapted to control the first and second feed means.
  • the second measuring device is not arranged on the fourth slide but on the sleeve.
  • the workpiece headstock, the tailstock and the first measuring device are arranged stationarily on the machine bed.
  • a plane relative movement with two translatory degrees of freedom between the workpiece and the main grinding wheel for the main grinding wheel is arranged on a cross slide, which is movable relative to the machine bed with two translational degrees of freedom in one plane.
  • the first abrading process uses the first abrading process first grinding wheel 20 measured from the workpiece 18 abraded Abtrag.
  • the measurement result of the first removal measuring device is transmitted to the machine control, which determines therefrom the time required for the completion of the first grinding operation.
  • the material to be abraded from the workpiece 18 in a second grinding operation by means of the second grinding wheel 54 is measured by means of the second removal measuring device.
  • the measurement result of the second removal measuring device is also transmitted to the machine control, which determines therefrom the time required for completing the second grinding operation.
  • the engine controller determines the difference between the first and second time periods. Subsequently, the two grinding operations are started, wherein the machine control controls the first and the second feed device such that the grinding operation for which the shorter time has been determined until the completion of the grinding operation, the time difference is started according to the start of the other grinding operation. This causes the two grinding operations to be completed at the same time.
  • the time difference is not automatically determined by the machine control. Instead, first by means of the first and second Abtragsmess founded the two ablated from a workpiece ablations whereupon an operator calculates from these offsets the time periods for completing the two grinding operations and the time difference between these periods. Thereafter, the operator programs the machine control for machining a series of substantially identical workpieces, the start times for the two grinding operations to be performed on each workpiece being set offset by the time difference determined from those for performing the grinding operations Periods have been calculated. Subsequently, the series of workpieces to be machined is processed with fixed programmed time points.
  • the invention provides a method and a device for abrasive round machining, which enable reliable and precise machining of workpieces with a sharp and burr-free transition edge between two rotationally symmetrical surfaces, even in large-scale production.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (10)

  1. Procédé d'usinage cylindrique par abrasion d'une pièce (18), qui présente un axe de pièce et tourne pendant la mise en oeuvre du procédé autour de l'axe de pièce, tandis qu'un premier outil abrasif (20) tournant autour d'un premier axe d'outil et la pièce (18) sont avancés en même temps l'un contre l'autre afin d'usiner une première surface de pièce dans un premier processus d'abrasion, caractérisé en ce qu'un second outil abrasif (54) tournant autour d'un second axe d'outil (56) est avancé contre la pièce (18) afin d'usiner une seconde surface de pièce dans un second processus d'abrasion, les deux surfaces de pièce étant réalisées à symétrie de révolution par rapport à l'axe de pièce et disposées contiguës l'une à l'autre de telle manière qu'une arête intermédiaire circulaire est formée entre elles, et les deux processus d'abrasion étant achevés en même temps.
  2. Procédé selon la revendication 1, caractérisé en ce qu'au moins un des deux processus d'abrasion est réalisé à calibrage automatique.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'au moins une des deux surfaces de pièce est réalisée en forme de cône.
  4. Dispositif d'abrasion (10) destiné à l'usinage cylindrique par abrasion d'une pièce (18), comportant une broche porte-pièce (12) tournant autour d'un axe de broche porte-pièce (14), qui est munie d'un porte-pièce (16) réalisé en vue du logement de la pièce (18), un premier outil abrasif (20) tournant autour d'un premier axe d'outil, et un premier dispositif d'approche afin d'avancer le premier outil abrasif (20) et la pièce (18) l'un contre l'autre, caractérisé en ce que le dispositif d'abrasion (10) comprend, en outre, un second outil abrasif (54) tournant autour d'un second axe d'outil (56), un second dispositif d'approche destiné à l'approche du second outil abrasif (54) contre la pièce (18), ainsi qu'un dispositif de commande destiné à la commande du dispositif d'abrasion (10) de telle manière que le premier outil abrasif (20) et la pièce (18) sont avancés l'un contre l'autre au moyen du premier dispositif d'approche afin d'usiner une première surface de pièce dans un premier processus d'abrasion, et en ce que le second outil abrasif (54) est avancé contre la pièce (18) au moyen du second dispositif d'approche afin d'usiner une seconde surface de pièce dans un second processus d'abrasion, les deux surfaces de pièce étant réalisées à symétrie de révolution par rapport à l'axe de broche porte-pièce (14) et disposées contiguës l'une à l'autre de telle manière qu'une arête intermédiaire circulaire est formée entre elles, et le dispositif de commande destiné à commander les deux dispositifs d'approche est réalisé de telle manière que les deux processus d'abrasion sont achevés en même temps.
  5. Dispositif d'abrasion (10) selon la revendication 4, caractérisé en ce que le premier dispositif d'approche comprend un premier chariot, au moyen duquel soit la pièce (18) avec la broche porte-pièce (12) soit le premier outil abrasif (20) est mobile le long d'un premier guidage linéaire droit en diagonale ou à angle droit par rapport à l'axe de broche porte-pièce (14) afin d'avancer le premier outil abrasif (20) et la pièce (18) l'un contre l'autre.
  6. Dispositif d'abrasion (10) selon la revendication 5, caractérisé en ce que le second dispositif d'approche comprend un deuxième chariot (50), au moyen duquel le second outil abrasif est mobile le long d'un deuxième guidage linéaire droit en diagonale ou à angle droit par rapport à l'axe de broche porte-pièce afin d'avancer le second outil abrasif (54) sur un côté opposé au premier outil abrasif (20) par rapport à la pièce (18) contre la pièce (18), le deuxième guidage linéaire comprenant au moins deux éléments de guidage (46, 48) oblongs guidant le deuxième chariot (50) et définissant le sens de translation du deuxième chariot (50), qui définissent deux axes parallèles l'un à l'autre et qui sont disposés de telle manière que l'axe de broche porte-pièce (14) passe entre les deux axes.
  7. Dispositif d'abrasion (10) selon la revendication 6, caractérisé en ce que le second outil abrasif (54) est une meule (54) et en ce que le dispositif d'abrasion (10) comprend, en outre, un dresseur (60) destiné au dressage de la meule (54), le dresseur (60) étant disposé du côté de la meule (54) opposé à l'axe de broche porte-pièce (14) de telle manière que la meule (54) est mobile au moyen du deuxième chariot (50) au choix, soit contre la pièce (18), soit contre le dresseur (60).
  8. Dispositif d'abrasion (10) selon l'une quelconque des revendications 5 à 7, caractérisé en ce que le second dispositif d'approche comprend un troisième chariot (42), au moyen duquel le second outil abrasif (54) est mobile parallèlement à l'axe de broche porte-pièce (14) le long d'un troisième guidage linéaire droit, le troisième guidage linéaire comprenant au moins trois éléments de guidage oblongs (34, 36, 38, 40) guidant le troisième chariot (42) et définissant le sens de translation du troisième chariot (42), qui définissent à chaque fois un axe parallèle à l'axe de broche porte-pièce (14) et sont disposés de telle manière que l'axe de broche porte-pièce (14) se trouve à l'intérieur d'un espace limité par une enveloppe autour des axes du troisième guidage linéaire au nombre minimum de trois.
  9. Dispositif d'abrasion (10) selon l'une quelconque des revendications 5 à 8, caractérisé en ce qu'il comprend, en outre, une contre-poupée (30), qui est munie d'une douille de contre-poupée (32) en vue de la stabilisation d'une extrémité longitudinale de la pièce (18) pendant l'usinage de la pièce, le second dispositif d'approche étant disposé sur la contre-poupée (30).
  10. Dispositif d'abrasion (10) selon les revendications 8 et 9, caractérisé en ce que le troisième guidage linéaire est disposé sur la contre-poupée (30) de telle manière que le troisième chariot (42) est mobile par rapport à la contre-poupée (30) le long du troisième guidage linéaire, la douille de contre-poupée (32) étant relié à la contre-poupée (30) dans un agencement passant à travers un passage réalisé dans le troisième chariot (42).
EP03405323A 2003-05-07 2003-05-07 Méthode et dispositif pour abraser des pièces à symétrie de révolution Expired - Lifetime EP1475185B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP03405323A EP1475185B1 (fr) 2003-05-07 2003-05-07 Méthode et dispositif pour abraser des pièces à symétrie de révolution
DE50301227T DE50301227D1 (de) 2003-05-07 2003-05-07 Verfahren und Vorrichtung zum abrasiven Rundbearbeiten
AT03405323T ATE304915T1 (de) 2003-05-07 2003-05-07 Verfahren und vorrichtung zum abrasiven rundbearbeiten
EP03405603A EP1475186B1 (fr) 2003-05-07 2003-08-19 Méthode et dispositif pour abraser des pièces à symétrie de révolution
DE50301228T DE50301228D1 (de) 2003-05-07 2003-08-19 Verfahren und Vorrichtung zum Rundschleifen
AT03405603T ATE304916T1 (de) 2003-05-07 2003-08-19 Verfahren und vorrichtung zum rundschleifen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03405323A EP1475185B1 (fr) 2003-05-07 2003-05-07 Méthode et dispositif pour abraser des pièces à symétrie de révolution

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EP1475185A1 EP1475185A1 (fr) 2004-11-10
EP1475185B1 true EP1475185B1 (fr) 2005-09-21

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DE102005056998B4 (de) * 2005-11-30 2008-12-24 Audi Ag Vorrichtung zur Bearbeitung eines Rotationskörpers
CN101767300B (zh) * 2009-12-01 2011-05-04 济南四机数控机床有限公司 自检测高精度喷油器升程配磨成形磨床及配磨方法
CN110815334B (zh) * 2019-11-07 2021-03-23 福州德寰流体技术有限公司 一种闸阀打压设备的内衬扩口切割装置
CN117001489A (zh) * 2023-08-18 2023-11-07 杭州龙砺智能科技有限公司 一种双工位可循环打磨设备与打磨方法

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JPH10128647A (ja) * 1996-10-29 1998-05-19 Toyo A Tec Kk バリ取り方法及び該バリ取り方法に使用する研削砥石のバリ取り構造
GB9803483D0 (en) * 1998-02-20 1998-04-15 Dinsdale Wayne E Apparatus for conditioning surfaces of a cylinder
DE10006559A1 (de) * 2000-02-15 2001-08-23 Bosch Gmbh Robert Schleifverfahren und Schleifmaschine
DE10126796C5 (de) * 2001-06-01 2011-01-20 Erwin Junker Grinding Technology A.S. Verfahren und Vorrichtung zum spitzenlosen Rundschleifen

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DE50301227D1 (de) 2006-02-02
ATE304916T1 (de) 2005-10-15
EP1475185A1 (fr) 2004-11-10
DE50301228D1 (de) 2006-02-02
ATE304915T1 (de) 2005-10-15

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