EP2107959B1 - Procédé et rectifieuse pour la rectification de pièces en forme de barres - Google Patents

Procédé et rectifieuse pour la rectification de pièces en forme de barres Download PDF

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Publication number
EP2107959B1
EP2107959B1 EP08750189A EP08750189A EP2107959B1 EP 2107959 B1 EP2107959 B1 EP 2107959B1 EP 08750189 A EP08750189 A EP 08750189A EP 08750189 A EP08750189 A EP 08750189A EP 2107959 B1 EP2107959 B1 EP 2107959B1
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EP
European Patent Office
Prior art keywords
grinding
workpiece
grinding wheel
clamping
bar
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EP08750189A
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German (de)
English (en)
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EP2107959A1 (fr
Inventor
Georg Himmelsbach
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Erwin Junker Maschinenfabrik GmbH
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Erwin Junker Maschinenfabrik GmbH
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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
    • B24B5/01—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor for combined grinding of surfaces of revolution and of adjacent plane surfaces on work
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • 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
    • 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
    • B24B5/313—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving work-supporting means carrying several workpieces to be operated on in succession
    • B24B5/32—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving work-supporting means carrying several workpieces to be operated on in succession the work-supporting means being indexable
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings
    • B24B7/17—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders

Definitions

  • the invention relates to a method for grinding rod-shaped workpieces, which have a non-circular, formed by plane and / or curved lines cross-section and flat, mutually parallel end faces, according to the preamble of claim 1 and a grinding machine, arranged in the two grinding spindles in tandem design and which is particularly suitable for carrying out the method, according to the preamble of claim 10.
  • a method of the type mentioned is known from DE 10 2006 007 055 A1 known and a grinding machine of the type mentioned in the EP-A-0 522 272 ,
  • short and / or rod-shaped workpieces are to be ground.
  • the term "short and / or rod-shaped workpieces" means that only those workpieces are meant which do not involve grinding work with an adjustment of the grinding wheel in the Z direction, i. the longitudinal direction of the workpiece require, or at best only a slight adjustment in the Z direction approximately to produce a chamfer in the region of the end surfaces.
  • the delivery of the grinding wheels thus takes place only in the direction perpendicular to the X-direction.
  • the workpieces have two end faces lying parallel to one another and an outer contour of length "L" lying preferably perpendicular thereto, wherein the length L may be greater or smaller than the effective diameter of the end face.
  • rod-shaped and disk-shaped workpieces are included, whose cross-section / outer contour can be arbitrary.
  • rod-shaped workpiece will be used, whereby also disc-shaped workpieces shall be included.
  • rod-shaped workpieces are mechanical actuators, switching and control devices in which rod-shaped parts transmit movements and forces as actuators.
  • the rod-shaped workpieces may have a length of preferably between 10 and 80 mm and a square cross-section with an edge length of preferably between 2 and 15 mm.
  • the non-round Cross section is achieved with appropriate guidance that the rod-shaped actuators move in the installed state only in its longitudinal direction, but not twist.
  • the workpiece is first held at its periphery and fed to a grinding station.
  • a double disc both front surfaces simultaneously pre-and finely ground.
  • the grinding wheels carry on the inner sides facing each other abrasive coatings for roughing and subsequent finishing, which come in succession by moving the grinding spindle in the feed direction (X-axis).
  • the distance of the finishing areas of the grinding wheels corresponds to the grinding dimension of the workpiece to be machined.
  • the outer contours of the workpiece are generated by non-circular grinding, for which purpose a second grinding spindle is pivoted into the processing position.
  • the first grinding spindle for double grinding which sits on the same pivotable housing as the second grinding spindle, is hereby swung out of the processing area. After machining the outer contour of the finished workpiece is removed, and the next workpiece is brought into the position for the double grinding of the end faces, for which the first grinding spindle must be swung again and delivered.
  • the invention is therefore based on the object to make the method and the grinding machine of the type mentioned so that a reduction of the cycle time takes place, and so an improved economic mass production is achieved in conjunction with a very good grinding result.
  • each workpiece is clamped in one of several clamping devices of a movable holding device individually on its longitudinal sides, that is not used only in the profiled recess of a carrier disk, this is the first clamping.
  • the tensioning devices are preferably designed as Beladegreifer having two mutually towards and away from each other movable jaws, between which the workpiece can be fixed by clamping the side surfaces.
  • the sides in contact with the workpiece are preferably adapted to the outer shape of a workpiece blank in order to keep it safe for transport through the grinding machine and for grinding.
  • the Beladegreifer are dimensioned so that both end sides of the workpiece protrude laterally from them, so that their grinding is possible without hindrance. They must also be shaped so that they are able to take also finished workpieces and to hold for transport to an unloading point.
  • the workpiece is transferred to a first processing area in which at least the finish grinding of the two end faces takes place.
  • the end faces in this clamping are pre-ground and finished.
  • a separate pre-grinding is not always necessary at this point.
  • the double surface grinding leads to an excellent result on the front sides.
  • the still clamped, so located in the first clamping workpiece is then transferred by means of a movement of the holding device between two coaxially spaced clamping jaws and clamped by these at its ends, which are already finished and thus the best conditions for a precise Offer further processing.
  • each rotational position of the workpiece rotated by the two clamping jaws corresponds to a specific distance of the grinding wheel in the direction of the X-axis.
  • the longitudinal contour of the workpiece can also be designed differently. Examples are in the FIG. 2 of the embodiment. This different longitudinal contour also includes frontal bevels and rounding.
  • the holding device is further clocked, i. rotated by a predetermined by the number of clamping points (at least 3, preferably 4, 5 or 6) predetermined angular amount ⁇ , and brings the finished workpiece in an unloading position where it is transferred to a discharge device.
  • A1 known method consists of the crucial difference is that the first and second processing position to which the movable holding device successively supplied the rod-shaped workpieces, each containing at least a first and a second grinding wheel in such a tandem arrangement that the at least one upper first grinding wheel of the first processing position before the second grinding wheel of the second processing position is in looping engagement.
  • a further acceleration can result from the fact that both workpieces are ground in the machining positions at least temporarily at the same time, which is readily possible for certain outer contours of the workpieces.
  • At least a simultaneous processing of two workpieces for shorter periods in the processing cycle can be achieved, such that the finish grinding of the end faces in the first processing position overlaps in time with the beginning of the non-circular grinding in the second processing position.
  • the double-plan grinding of the end faces indicated.
  • the workpiece clamped in the holding device is brought up to the first grinding wheel, which can be composed of two individual grinding wheels as a "double grinding wheel", which is done by turning the holding device by a predetermined angle ⁇ .
  • the process of the face grinding itself takes place by moving the first grinding wheel mounted in the usual way on a first grinding spindle.
  • the rotating first grinding wheel, the double grinding wheel can be moved in the direction of the X-axis.
  • the two grinding wheels of the double grinding wheel embrace the rod-shaped workpiece, which runs parallel to the axis of rotation of the first grinding wheel with its longitudinal direction.
  • first grinding wheels first grinding wheel
  • double grinding wheel double grinding wheel
  • the double-plan grinding of the end faces of the workpiece can also take place in such a way that the holding device, which carries the workpiece clamped, is moved relative to the first grinding wheel, the double grinding wheel, in the sense of a feed.
  • This movement takes place in the case of a rotatable holding device, for. B. in the form of a timing disc, preferably as a rotation.
  • the movement can also be realized as a linear displacement of the holding device.
  • an already finished at the end faces workpiece is spent by the holding device in the second processing position and taken over there by the second clamping device, after which it is currently held apart clamping jaws apart. It thus has no contact with the holding device and can - be rotated on the long sides - set by the second clamping device in rotation.
  • This decoupling of the relevant workpiece from the holding device makes it possible to move the holding device, which carries a further workpiece whose end faces are to be processed, in such a way that the further workpiece enters the grinding region of the first grinding wheel and is finish ground therefrom.
  • This double-plan grinding takes place in this modification of the method substantially simultaneously with the non-circular grinding of the outer contour of the first-mentioned workpiece.
  • the two grinding wheels are arranged according to a particularly preferred embodiment of claim 3 in tandem on a common wheelhead, it follows inevitably that the first grinding wheel follows the movement of the second grinding wheel in non-circular grinding.
  • this has no significance for the double-plan grinding according to the method variant described, since the range of motion is only slight and the movement takes place only very slowly compared to the rotational speed of the first grinding wheel. The grinding result of the first grinding wheel is not affected by this.
  • the method can also be performed at this point so that the workpiece remains stationary in its position and the first grinding wheel in the longitudinal and transverse directions to the workpiece is movable.
  • the method of the grinding wheel in the longitudinal direction is preferably used for adjusting the grinding wheels with respect to the workpiece or with respect to the position of the second grinding wheel for machining the outer contour.
  • the development according to claim 3 indicates an advantageous possibility of how the first sub-operation of the surface grinding can be transferred to the second sub-operation of the peripheral grinding.
  • the solution is chosen to store the first grinding wheel on the one hand and at least one second grinding wheel on the other hand with the associated grinding spindles on a common wheelhead, which can be moved in the X direction.
  • the individual workpieces are successively fed first to the area of action of the first grinding wheel and then to the second grinding wheel.
  • For the necessary during grinding feed movement in the direction of the X-axis of the common wheelhead is moved in the direction of the X-axis controlled.
  • sensors are integrated into the loading gripper of the holding device, with which the Schleifaufrich the individual tensioned workpieces can be determined in an advantageous manner.
  • the values thus obtained are transmitted to the control device of the grinding machine and are taken into account by the latter for determining the course of the peripheral grinding. This can also result in an acceleration of the processing.
  • the inventive method according to claim 8 is supplemented to the effect that a bezel for supporting the workpiece is provided against deflection by transverse forces.
  • These lunettes one of which is associated with a Beladegreifer, ie a clamping point for the workpiece, are mounted on the holding device together with the Beladegreifern. The lunettes are deliverable on the holding device with respect to the position of the workpiece or removable from this position and reach only in the second processing position for grinding the outer contour with the second grinding wheel in use.
  • the bezel has on its engagement side with the workpiece on a preferably semi-circular in cross section recess which is adapted to the mentioned largest diameter of the finished workpiece.
  • the holding device is then rotated again in the context of a new working cycle by the angle ⁇ , whereby the finished Removed workpiece from the second processing area and finally a discharge device is supplied.
  • the latter depending on the number of clamping points on the holding device and the arrangement of the unloading station in relation to the holding device may be achieved only after further work cycles.
  • the invention also relates to a grinding machine according to the preamble of claim 10, as it is known from EP-A-0 522 272 is known.
  • This relates to a thread grinding machine, so it is intended for grinding rotationally symmetrical workpieces.
  • a movable grinding table is provided, on which a workpiece headstock and a tailstock are arranged. The workpiece is clamped between these and set in rotation about its longitudinal axis. The direction of movement of the grinding table coincides with the direction of the rotational and longitudinal axes of the workpiece.
  • the workpiece is guided past two or three spaced-apart grinding wheels, which are intended for different grinding operations and can be delivered vertically against the workpiece.
  • the grinding wheels can become independent can be undelivered grinding spindles, which are arranged with parallel axes of rotation on a common wheel head, which is referred to there as a "lifting".
  • a tandem arrangement is realized with horizontally adjacent grinding spindles.
  • the wheelhead can only be moved in one direction parallel to the rotation and longitudinal axis of the workpiece.
  • two grinding wheels with a common axis of rotation can be mounted on a single grinding spindle. In this way, various grinding operations can be performed on a single workpiece without the need to change the clamping. For the transition from one to the other grinding operation, however, the workpiece must be moved laterally, and it can always be ground only a single workpiece in its unchanged setting. The processing time is too long.
  • the special feature of this grinding machine is that two grinding spindles with parallel axes of rotation are mounted on a wheelhead in a "tandem arrangement", the two grinding spindles are arranged not only side by side, but also one above the other and with fixed parallel spindle axes and together by the wheelhead in a direction perpendicular to the longitudinal axis of the workpieces are movable.
  • the term "tandem arrangement” refers to the type of arrangement of the grinding spindles or grinding wheels and is intended to express that the grinding wheels of both grinding spindles at least temporarily can simultaneously perform a machining on two workpieces, for which, however, only one feed mechanism is required.
  • This feature distinguishes this arrangement in principle from the known grinding machine according to the EP-A-0 522 272 and also known arrangements with two grinding spindles on a wheelhead, in which the individual grinding spindles are brought by pivoting parts of the grinding headstock about an axis of rotation for engagement on a single workpiece.
  • the time-consuming pivoting of the grinding spindles is completely eliminated in the tandem arrangement.
  • the time required for the introduction of the workpieces from one processing point to the other in the grinding machine according to the invention is low, on the other hand, especially in the known grinding machines about after DE 10 2006 007 055 A1 the workpiece must be brought into the machining position and brought out again.
  • the grinding machine according to claim 10 also has the advantage that each several rod-shaped workpieces are transported and processed simultaneously by the machine, which are ground flat in the first clamping position on the front sides and machined in the second clamping position on the long sides by circumferential grinding. After passing through the grinding machine, the rod-shaped workpieces are finished ground. The handling times are reduced to a minimum.
  • the holding device for the workpieces which serves both for clamping the workpieces and for their transport to the processing positions and by the grinding machine from a loading to an unloading device, is designed as a timing disk.
  • the preferred designed as a circular plate timing disk is rotatable about a horizontal axis and carries in the periphery or on the outer edge arranged clamping points, which are preferably designed as Beladegreifer with two reciprocally movable toward and away gripper jaws.
  • the clamping points of which at least three, preferably 4, 5 or 6 are present, are at equal intervals on the circumference of the timing disk.
  • the claims 23 and 24 are directed to that the second grinding wheel of the grinding machines according to the invention is adapted to the longitudinal contour of the finished rod-shaped workpiece and can also include its frontal bevels with.
  • the machining of the workpiece side surfaces by the numerically controlled peripheral grinding on the principle of CX interpolation allows rounding radii or chamfers on the edges without cycle time extension are ground together with the side surfaces. This also applies to the face chamfers, if the contour of the grinding wheel is profiled accordingly.
  • the front chamfers are ground in the same clamping in a contour simultaneously with the side surfaces and with the longitudinal chamfers or radii of curvature. A recapture eliminated.
  • the process is much easier and safer to control with regard to the required geometric data (dimensional, shape and position tolerances). It is not only clamped processing time, but in particular, the risk of inaccuracies associated with the re-clamping is avoided.
  • the contour of the grinding wheels during dressing can be set with an accuracy that lies in the ⁇ m range. This results in frontal bevels, which always have exactly the same width over their entire length and each other. Also in this respect, the accuracy of the result is thus improved by the invention at the same time as the speed of processing.
  • the claim 12 relates to the advantageous and preferred embodiment of the drive of the timing disc, which is drivable both in the forward direction and in the opposite reverse direction. This makes it possible to achieve a substantially simultaneous grinding operation of both grinding wheels on a respective workpiece, which leads to a particularly short cycle time for the complete machining of the workpieces, as described below with reference to FIG 10 and 11 is explained.
  • the grinding machine according to the invention works with proven basic elements of modern grinding technology, which, however, are linked together in an innovative way by an intelligent conveying and clamping system.
  • the structure of the grinder remains simple.
  • the loading of the grinding machine can be done with a load cell through a hatch, so that, for example, the so-called "keyhole solution" is possible, in which the workpieces are supplied.
  • other embodiments of conveyor systems for feeding and discharging the workpieces to and from the holding device are possible.
  • the grinding machines according to the invention even smaller batch sizes can be produced economically, because they are set up to perform a complete machining on a specific type of workpiece. So there is a lot of flexibility.
  • the numerically controlled peripheral grinding according to the principle of CX interpolation is also given a high degree of flexibility; the setup times when switching to a different cross-sectional shape of the rod-shaped workpieces can be very short. For example, in the case of a rod-shaped workpiece with a square cross-section, it is possible to switch from longitudinal edges broken down by bevels to rounded longitudinal edges within 3 minutes, because the changeover takes place only through the part program for the workpiece to be produced.
  • the chamfer also adapts with the cross section.
  • FIG. 1 exemplifies an impression of the shape, which can have the cross sections of the rod-shaped workpiece 1 to be ground.
  • the rod-shaped workpiece 1 is a parallelepipedic rod with square end faces 2 and rectangular longitudinal sides 3, which meet in side edges 3 a, s.
  • Fig. 1a to 1d A preferred field of application of such rod-shaped workpieces 1 are actuators in mechanical switching or adjusting devices. These actuators may have a length L between 10 and 80 mm and a cross section between 2 and 15 mm; however, this is just an example.
  • As a material of such rod-shaped workpieces 1 different metals, but also ceramic materials in question.
  • the cross section may also deviate from the shape of the geometrically strict square (b).
  • the longitudinal edges can be rounded (c) or provided with flat chamfers (d).
  • the square shape can also be varied to a square with convex surfaces (e) or with concave surfaces (f).
  • contours are possible with cross sections (g) bounded solely by curved lines, and thus also oval contours (h) or polygons of any order (k), in which the modifications given for the square cross section are likewise valid.
  • the longitudinal contour of the rod-shaped workpiece 1 to be ground is in no way fixed to the geometrically strict shape of the rectangle, as it is once again described in FIG. 2a is shown.
  • FIG. 2 shows the longitudinal sides 3 of the rod-shaped workpiece 1 in different variants. So even in the transition to the end faces 2 flat chamfers 2a ( Fig. 2b ) or rounding 2b ( Fig. 2c ) to be available.
  • the strict rectangular shape can be varied to a crowned shape (d).
  • conical longitudinal contours (e) are possible, but also a rectangular basic shape with lowered central part (f).
  • FIG. 3 represents the embodiment of a grinding machine according to the invention, with the starting from a blank, the complete machining of the rod-shaped workpiece 1 is possible.
  • a grinding table with a slide 5 is formed on a machine bed 4.
  • the holding device 6 is movable in the direction of this slide 5. This movability is used in particular for adjusting the position of the holding device 6 for adaptation to different workpieces 1 and their dimensions. Deviating from the Fig. 3 It is also possible that the sliding movement of the grinding wheels 14, 15 with respect to the workpiece 1 in the direction of the Z-axis as a cross slide solution below the X-axis on the machine bed 4 may be arranged.
  • the holding means 6 is preferably constituted by a circular timing disc 6b which is rotatable about its center in a plane perpendicular to the Z-direction (i.e., the direction of the slide 5).
  • the timing disc 6b is connected to a base part 6a with the slide 5 and is located substantially above this.
  • the timing disk 6b carries in the vicinity of its peripheral region a plurality of equally spaced angularly arranged clamping points 40 for receiving the workpieces 1, 1 'to be machined.
  • the clamping points 40 are for this purpose designed as Beladegreifer 24 which clamp the outer periphery of the workpiece 1 between two clamping jaws 24a fixed or can release by moving apart of the clamping jaws 24a.
  • the shape of the clamping jaw 24a of the loading gripper 24 facing the workpiece 1 is preferably adapted to the outer shape of the unmachined workpieces 1 in order to securely fix them for grinding.
  • the load grippers 24 must be able to hold a finished workpiece 1 safely, and they must not interfere with the grinding wheels 14, 15 during processing.
  • the minimum number of clamping points 40 is three, wherein in operation at least one (at reference numeral 43) each for loading or unloading of the workpieces 1 and the other two are each at a processing position 41, 42 of the first and second grinding wheels 14, 15 , Preferably, however, more than three clamping points 40 are provided, as in FIG. 4 is shown where six of them are present. As a result, the loading and unloading areas can also be separated from each other. However, it is preferred that the loading and unloading of the workpieces takes place at the same loading and unloading position 43, as this requires the least space. For this purpose, of course, any loading and unloading devices are conceivable, which are familiar to the expert. Regardless of the number of clamping points 40 but are always at most two workpieces 1, 1 'under processing, since according to the invention only two grinding spindles 12, 13 are present, however, the first grinding wheel 14 may be equipped with two individual grinding wheels 14a, 14b.
  • the workpiece headstocks 7a and 7b On both sides of the holding device 6 are the workpiece headstocks 7a and 7b, which are also movable on the slide 5.
  • the workpiece spindle sticks 7a, 7b can be moved individually or together.
  • jaws 8a, 8b are mounted, which can be driven for rotation.
  • a control is provided by which the two coaxial with each other at a distance from each other clamping jaws 8a, 8b are rotated strictly synchronous and in phase.
  • the clamping jaws 8a, 8b each carry a friction lining 9a, 9b, with which the clamping jaws 8a, 8b can be pressed against the end faces 2 of the rod-shaped workpiece 1 in order to clamp this, compare also FIG. 7 .
  • the friction linings 9a, 9b of Clamping jaws 8a, 8b are made of a very wear-resistant material, such as carbide, thereby their wear is reduced.
  • the grinding headstock 10 carries two grinding spindles 12 and 13, which are arranged offset in height and with respect to the horizontal distance from the slide 5 to each other, as shown in FIG Fig. 4 is shown.
  • the first grinding spindle 12 carries two first grinding wheels 14a, 14b, while the second grinding spindle 13 is provided with the second grinding wheel 15.
  • the grinding spindles 12 and 13 drive the associated grinding wheels 14a, b and 15 for rotation about their axes of rotation 14c and 15a.
  • the slideway 5 defines the Z-axis with the lateral displacement direction of the movable holding device 6 and the workpiece headstocks 7a, 7b.
  • the common rotation and drive axis 30 of the jaws 8a, 8b forms the axis of rotation C, while the direction perpendicular to the Z-axis and the C-axis direction of displacement of the grinding headstock 10 is the X-axis.
  • first grinding wheel 14 provided in twin arrangement by two individual grinding wheels 14a, 14b, the double grinding wheel 14, go out FIG. 6 out.
  • the two grinding wheels 14a, 14b are arranged on the common rotational axis 14c of the first grinding spindle 12 at an axial distance D, which is defined by the spacer 17.
  • Each grinding wheel 14a, 14b consists of a base body 18a, 18b.
  • the two mutually facing broad sides 19a, 19b of the base body 18a, 18b have in their outer peripheral region depending on a recess 20a, 20b, in which an outer annular zone 21a, 21b with a roughing and an inner annular zone 22a, 22b with a Simple coating is located.
  • the two pads 21 a, 21 b and 22 a, 22 b form annular body within the recesses 20 a, 20 b.
  • the outer annular zones 21a, 21b have a conically widening shape with the roughing surface.
  • FIG. 5A illustrates the arrangement of the two grinding wheels 14, 15 and thus the axes 14c and 15a of the associated grinding spindles 12, 13 with respect to each other and to the holding device 6 with the workpieces 1. It is a lateral view in the Z direction.
  • the first grinding wheel 14 has already completed the machining of the end faces 2 of the workpiece 1 and has arrived by moving in the X direction in a position in which the two grinding surfaces of the double grinding wheel are no longer in engagement with the workpiece 1.
  • the workpiece 1, the outer contour is not processed, is still held by the Beladegreifer 24 of the clamping point.
  • the second grinding wheel 15 just begins to come into contact with another workpiece 1 whose end faces 2 have been finished by the first grinding wheel 14 in a previous cycle.
  • the workpiece 1 is clamped by clamping jaws 8a, 8b, not shown, in the longitudinal direction and is synchronously offset by the associated drives of the two workpiece spindle rods 7a, 7b, not shown, about the C-direction in rotation.
  • the clamping jaws 24a of the loading gripper 24 are released from the workpiece 1 after the workpiece 1 is gripped and clamped by the clamping jaws 8a, 8b.
  • two clamping jaws 24a of a loading gripper 24 are arranged diametrically opposite each other in each clamping point and in opposite directions to each other movably controlled. With their clamping jaws 24 a, the loading grippers 24 are adapted to the cross section of the rod-shaped workpiece 1. In loading position 43 of the FIG. 4 the clamping jaws 24a of the loading gripper 24 have moved apart. In position 41, the clamping jaws 24a of the loading gripper 24 have grasped the rod-shaped workpiece 1 and adjust themselves against this on both sides.
  • This type of gripping and clamping has the advantage that when gripping and clamping the rod-shaped workpiece 1 whose longitudinal center remains always in the same horizontal plane even with different grinding size of the workpieces 1.
  • the grinding allowance thus has no influence on the position of the workpiece center. During later peripheral grinding, the allowance is removed evenly.
  • the holding device 6 can zoom the clamped rod-shaped workpiece 1 close to the first grinding wheel 14.
  • the blank of the rod-shaped workpiece 1 is transferred from a conventional transport system to the holding device 6 to a clamping point 40 in the loading position 43.
  • the workpiece 1 as already described, clamped by means of the clamping jaws 24a of the loading gripper 24 centric, compare the first processing position 41 of FIG. 4 ,
  • the holding device 6 then rotates the timing disk 6b by the angle ⁇ and leads the workpiece 1 into the area of action of the first grinding wheel 14.
  • apparent clamping in the first processing position 41 runs from the same time double-plan grinding of the two end faces 2 on the rod-shaped workpiece 1 from.
  • the wheelhead 10 moves in the direction of the X-axis against the rod-shaped workpiece 1, compare the FIG.
  • the outer annular zones 21a, 21b with the roughing coating each grind one end face 2 of the rod-shaped workpiece 1. Then sweep the inner annular zones 22a, 22b with the sizing each one end face 2, so that the end faces 2 are finished ground.
  • the wheelhead 10 continues to travel in the X direction, whereby the second grinding wheel 15 comes into engagement with the surface of another workpiece 1, which is held by the two workpiece headstocks 7a, 7b and is in the second machining position 42.
  • the wheelhead 10 then returns in the direction of the X-axis in its initial position, so that all grinding wheels 14, 15 are out of engagement with workpieces 1.
  • the timing disk 6b of the holding device 6 is further rotated by the predetermined by the number of clamping points 40 angle ⁇ , and a new power stroke begins.
  • the two workpiece spindle rods 7a, 7b approach the rod-shaped workpiece 1 on both sides until the clamping jaws 8a, 8b with their friction linings 9a, 9b have clamped the rod-shaped workpiece 1 on its end faces 2.
  • the clamping of the rod-shaped workpiece 1 at its end faces 2 but also solely by the jaws 8a, 8b take place, if not only rotationally driven, but also axially movable.
  • the Beladegreifer 24 of the clamping point 40 are moved apart on the timing disk 6b.
  • the rod-shaped workpiece 1 is clamped by the two clamping jaws 8a, 8b not only in its second clamping, but also controlled by the two jaws 8a, 8b driven to rotate, wherein the common rotational and drive axis 30 of the two clamping jaws 8a, 8b the C -Axis of the grinding process forms.
  • the clamping jaws 8a, 8b, the rod-shaped workpiece 1 rotate only when it is outside the Beladegreifer 24, the first clamping position is thus canceled.
  • the show Figures 5A and 5B in that the second grinding wheel 15 is moved up in the direction of the X-axis to the circumference of the rod-shaped workpiece 1 and delivered.
  • FIG. 7 shows the state of the peripheral grinding in the second clamping from above, wherein the clamping jaws 8a, 8b clamp the rod-shaped workpiece 1 and rotate at the same time.
  • the common rotary and drive shaft 30 forms the C-axis of the grinding process.
  • the second grinding wheel 15 covers with its axial width B the length L of the rod-shaped workpiece 1.
  • each rotational position of the rod-shaped workpiece 1 corresponds to a certain distance between the C-axis and the axis of rotation 15a of the second grinding wheel in the direction of the X-axis.
  • This process is familiar to those skilled in the principle of the known CNC non-circular grinding and need not be explained in detail here.
  • the in FIG. 1 illustrated and similar cross sections are executed.
  • the mutual movement of Workpiece 1 and second grinding wheel 15 is thereby generated by moving the grinding headstock 10 in the direction of the X-axis.
  • the roughing and finishing can be done with a single second grinding wheel 15.
  • FIG. 2 different longitudinal contours can be realized by the peripheral contour 15a of the second grinding wheel 15 is profiled accordingly, see. Fig. 2d , In particular, it is also possible to grind face-side bevels 2a or rounding 2b on the rod-shaped workpiece 1 in a contoured outline and in the same clamping at the same time as the grinding of the longitudinal sides 3.
  • the peripheral contour 15b of the second grinding wheel 15 must be shaped accordingly, cf. Fig. 2b ,
  • the holding device 6 fulfills alternating tasks in the course of the method according to the invention. It initially serves as a transport device that conveys rod-shaped workpieces 1 into the effective range of the first grinding wheel 14. There it also serves as a clamping device, which ensures the first clamping of the rod-shaped workpiece 1 during grinding of the end faces 2. Thereafter, the holding device 6 again serves as a conveying means, which the rod-shaped workpiece 1 in the region of the two clamping jaws 8a, 8b according to the second processing position 42 according to FIG. 4 transferred. The clamping in the second clamping for performing the peripheral grinding is then taken over by the clamping jaws 8a, 8b.
  • the holding device 6 transports the finished ground workpiece 1 further to a discharge position, from where it can be removed from an unloading device, not shown.
  • the thus released clamping point can then be equipped with a new workpiece blank, which is preferably done by means of a arranged in a near its own loading position 43 loading device.
  • a further embodiment of the invention is shown, in which the individual clamping points 40 of the timing disc 6b are provided with bezels 50 as means for supporting the workpiece 1 during the processing of the outer contour by means of the second grinding wheel 15.
  • the bezel 50 forming component is provided on the timing disk 6b, which is brought in apart driven jaws 24a of the loading gripper 24 in contact with the held by the clamping jaws 8a, 8b and rotatably driven workpiece 1.
  • This component has, on the front side facing the workpiece 1, a substantially semicircular recess 51 adapted to the dimensions of the workpiece 1, as shown in the side view Fig. 8 is shown.
  • the workpiece 1 is always supported at least at one point of its outer contour during rotation about its longitudinal axis in the C direction at least in the central region. hereby Bending of the workpiece 1 is prevented under the influence of the grinding pressure, so that a particularly high grinding accuracy and higher Zerspanvolumen can be achieved.
  • Fig. 9 is a plan view of the arrangement according to Fig. 8 which shows a cross section through the serving as a bezel 50 component. It can be seen in this illustration that the inner contour of the component can be formed crowned, so that essentially only a point or line contact of the bezel 50 can take place with the workpiece 1 in its central region. This results in a minimal impairment of the rotation of the workpiece 1 and a reduction in the risk of scoring or other damage to the workpiece.
  • the reference numerals in the 8 and 9 have the same meaning as in the other figures.
  • the lunettes according to the invention are of in the FIGS. 8 and 9 Control devices, not shown, which are hydraulically, pneumatically or controlled by electrical adjusting devices brought into contact with the workpiece 1 or removed from this, as explained in detail in connection with the claims 8 and 9.
  • the required movements of the steady rests 50 result from the requirements of the respective method used.
  • the peripheral grinding described here offers a particular advantage when the rod-shaped workpiece 1 has a transversely layered structure, as is valuable for some applications. It can therefore be provided alternately firmly connected layers of different materials in the workpiece 1. In contrast to longitudinal plan grinding, the materials of the individual layers in the area of the side surfaces are not smeared together during circumferential grinding.
  • FIG. 10 shows a first phase of the process control according to the invention, in which the double-plan grinding of the end faces of the workpiece 1, 1 'by movement of the holding device 6 takes place.
  • This variant of the method corresponds to the second alternative in claim 2, features c2).
  • this embodiment of the method it is possible to work two workpieces 1 and 1 'substantially simultaneously.
  • the opened clamping jaws 24a do not come into conflict with the second grinding wheel 15 even when the clock disk 6b carrying them rotates in a limited angular range.
  • the timing disk 6b is thus freely movable while the first workpiece 1 is ground by the grinding wheel 15 on the circumference.
  • Another workpiece 1 ' is fixedly clamped to the timing disk 6b by means of the associated clamping jaws 24b and is located shortly before engagement with the first grinding disk 14, by means of which the two end faces 2 are to be ground flat. This is done so that the timing disk 6b is rotated forward until the in Fig. 11 shown state is reached, in which the further workpiece 1 'is finished ground on the front sides.
  • the timing disk 6b is turned backwards so far that the first workpiece 1, which has been finished in the second machining position 42, can again be gripped by the clamping jaws 24a.
  • This is essentially the same as in Fig. 10 illustrated state.
  • the unloading position 43 not shown (s. Fig. 4 ), which is done by rotating the timing disc 6b in the forward direction A.
  • the other workpiece 1 ' is in this case moved from the first processing position 41 to the second processing position 42, where it is in turn the finishing by circumferential grinding of the longitudinal sides 3 is supplied.
  • the first workpiece 1 'passes in the described method inevitably several times the range of action of the first grinding wheel 14.
  • the first driving through is relatively slow in the forward direction A for double-plan grinding of the two end faces 2.
  • the further workpiece 1' once again passes through the first grinding wheel 14 therethrough to bring the timing disk 6b to the take-up position for the finish-ground first workpiece 1.
  • the further workpiece 1 ' is again moved forward in order to transfer the further workpiece 1', which has been ground to completion on the end faces 2, into the second processing position 42.
  • the first grinding wheel 14 has substantially no abrasive effect on the workpiece 1 ', since this is already finished.
  • the wheelhead 10 can also be moved in the X-direction (see FIG. 2) for the short time of the return rotation and forward rotation of the timing disk 6b. Fig. 4 ) are removed from the grinding position so far that the two grinding wheels 14, 15 come to lie outside the path of movement of the workpieces. As a result, any negative influence on the workpiece 1 during transport is excluded.
  • both grinding wheels 14 and 15 at the same time each work a workpiece 1, 1 ' results from the above-described prior art and also with respect to the previously with reference to the Fig. 5A and 5B explained process control, in which only a grinding, but no return movement takes place, a considerable time gain.
  • This time saving is in particular that none of the grinding wheels has 14 and 15 idle times, which are due to the waiting for the finish grinding by means of the respective other grinding wheel.
  • Both grinding wheels 14, 15 are practically - except for relatively short transport and Umspann instruments for the workpieces 1, 1 '- constantly in use.
  • the lateral and vertical distance of the axis 14c of the first grinding spindle 12 from the axis 15a of the second grinding spindle 13 in the tandem arrangement on the associated wheelhead 10 must be adapted to the special requirements in this procedure.
  • the two axes 14c and 15a have to move closer together in this case than in the other variant of the procedure according to the Fig. 5A and 5B in which for grinding only the grinding spindles 12, 13 are delivered, while the holding device 6 for the workpieces 1, here the timing disk 6b, is not moved in the sense of a delivery.
  • the distance of the axes 14c and 15a is to be chosen so that when transferring a workpiece 1 in the clamping jaws 8a, 8b of the second clamping another workpiece 1 'in the first clamping does not come into contact with the first grinding wheel 14, like this in Fig. 10 you can see.

Claims (27)

  1. Procédé pour la rectification de pièces en forme de barres (1),
    qui présentent une section transversale non ronde, formée par des lignes planes et/ou courbes et qui présentent des côtés frontaux (2) plans, s'étendant parallèlement l'un à l'autre, comprenant les étapes de procédé suivantes :
    a) la pièce non usinée en forme de barre est transférée à un dispositif de fixation mobile (6), et est serrée dans un premier serrage au niveau de ses côtés longitudinaux (3) ;
    b) la pièce serrée en forme de barre (1) est amenée par le dispositif de fixation (6) dans une première position d'usinage (41) ;
    c) les deux côtés frontaux (2) de la pièce en forme de barre (1) sont rectifiés dans la première position d'usinage (41) de manière simultanée par rectification double face ;
    d) la pièce serrée en forme de barre (1) est transférée par le dispositif de fixation (6) dans une deuxième position d'usinage (42) entre deux mâchoires de serrage (8a, 8b) situées à distance l'une de l'autre suivant le même axe, et est serrée par celles-ci dans un deuxième serrage au niveau de ses côtés frontaux déjà usinés (2), puis le premier serrage au niveau des côtés longitudinaux (3) est supprimé ;
    e) les mâchoires de serrage (8a, 8b) sont entraînées en rotation de manière commandée de façon synchrone, et les côtés longitudinaux (3) de la pièce en forme de barre (1) sont rectifiés par rectification périphérique à commande CNC selon le principe de l'interpolation C-X dans la deuxième position d'usinage (42), l'axe C étant formé par les axes communs de rotation et d'entraînement (30) des deux mâchoires de serrage (8a, 8b) et l'axe X s'étendant perpendiculairement à l'axe C ;
    f) pour desserrer le deuxième serrage, les mâchoires de serrage (8a, 8b) sont écartées l'une de l'autre, la pièce en forme de barre (1) est amenée dans une position de déchargement et est ensuite transférée à un dispositif de déchargement ;
    caractérisé en ce que les étapes de procédé supplémentaires suivantes sont prévues :
    g) les pièces à rectifier (1) sont maintenues par le dispositif de fixation (6) qui présente plusieurs points de serrage (40), et sont acheminées à un premier disque abrasif (14) et à un deuxième disque abrasif (15) pour la rectification des pièces (1),
    les disques abrasifs (14, 15) étant disposés en tandem l'un derrière l'autre et l'agencement en tandem étant réalisé de telle sorte que la premier disque abrasif (14) et le deuxième disque abrasif (15) soient disposés avec des axes de rotation s'étendant parallèlement l'un à l'autre (14c, 15a) l'un au-dessus de l'autre et décalés latéralement parallèlement l'un à l'autre, de telle sorte que le premier disque abrasif supérieur (14) se situe avant le deuxième disque abrasif (15) et parvienne en engagement de rectification avant celui-ci, dans le cas d'une pièce (1) respectivement associée ;
    h) après le desserrage du deuxième serrage, la pièce en forme de barre (1) est à nouveau reprise par le dispositif de fixation (6) et est amenée dans la position de déchargement.
  2. Procédé selon la revendication 1, comprenant les étapes de procédé suivantes précisant l'étape c) :
    c1) pour la rectification double face de ses côtés frontaux (2), la pièce en forme de barre (1) est acheminée dans sa première position d'usinage (41) au premier disque abrasif (14) réalisé sous forme de double disque abrasif, celui-ci pouvant être constitué à partir de deux disques abrasifs individuels (14a, 14b) rotatifs, de même axe et situés à une distance axiale D l'un de l'autre, ou à partir d'un disque abrasif unique présentant des garnitures abrasives correspondant aux deux premiers disques abrasifs (14a, 14b), lequel disque abrasif unique est réalisé en forme de fourche en section transversale, la direction longitudinale de la pièce en forme de barre (1) s'étendant parallèlement à l'axe de rotation commun (14c) du premier disque abrasif (14) ;
    c2) la rectification des faces s'effecte par déplacement du premier disque abrasif (14) dans la direction de l'axe X ou par déplacement du dispositif de fixation (6), conjointement avec la pièce serrée (1), par rapport au premier disque abrasif (14) ;
    c3) lors de chaque déplacement, les deux côtés frontaux (2) de la pièce en forme de barre (1) passent l'un derrière l'autre de manière à être rectifiés, à travers des zones annulaires extérieures, comprenant un revêtement abrasif, disposées au niveau des côtés larges tournés l'un vers l'autre (19a, 19b) du premier disque abrasif (14).
  3. Procédé selon la revendication 2,
    dans lequel les côtés longitudinaux (3) de la pièce en forme de barre (1) dans sa deuxième position d'usinage (42) sont rectifiés par un deuxième disque abrasif rotatif (15) dont l'axe de rotation (15a) s'étend parallèlement à l'axe commun de rotation et d'entraînement (30) des deux mâchoires de serrage (8a, 8b), les premier et deuxième disques abrasifs (14, 15) étant disposés avec des axes de rotation (14c, 15a) s'étendant parallèlement l'un à l'autre sur une poupée porte-meule commune (10).
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    dans lequel, au même instant, à chaque fois une pièce (1) est présente dans la première position d'usinage (41) et une pièce est présente dans la deuxième position d'usinage (42), caractérisé en ce que la rectification des deux pièces (1) s'effectue simultanément au moins sur certains intervalles de temps.
  5. Procédé selon l'une quelconque des revendications 1 à 4,
    dans lequel la pièce en forme de barre est saisie par au moins deux dispositifs de préhension de chargement (24) situés sur le dispositif de fixation (6), lesquels sont adaptés à la section transversale de la pièce en forme de barre (1) et s'appliquent en regard l'un de l'autre contre les côtés longitudinaux (3) de la pièce en forme de barre (1), de telle sorte que la pièce (1) soit serrée.
  6. Procédé selon la revendication 5, dans lequel le dispositif de fixation (6) présente un nombre supérieur à trois de paires de dispositifs de préhension de chargement (24) et est déplaçable de manière commandée autour d'un axe de rotation qui s'étend parallèlement à l'axe de rotation et d'entraînement commun (30) des deux mâchoires de serrage (8a, 8b).
  7. Procédé selon la revendication 5 ou 6, dans lequel les dispositifs de préhension de chargement (24) servent aussi à déterminer l'ampleur de la rectification (31), qui est déterminante pour le déroulement de la rectification périphérique dans le deuxième serrage, qui s'étend parallèlement à l'axe de rotation et d'entraînement commun (30) des deux mâchoires de serrage (8a, 8b).
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend les étapes de procédé supplémentaires suivantes :
    - dans la deuxième position d'usinage (42), toutes les arêtes latérales (3a) de la pièce (1) sont d'abord rectifiées à la dimension finie ;
    - ensuite une lunette (50) avec un évidement (51) de forme sensiblement semi-circulaire pour recevoir la pièce (1) est appliquée contre la pièce (1) ; la lunette (50) étant en place, se produit l'usinage suivant des côtés longitudinaux (3) de la pièce (1) jusqu'à la dimension finie ; finalement, la lunette (50) est retirée de la pièce (1).
  9. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'il comprend les étapes de procédé supplémentaires suivantes :
    - dans la deuxième position d'usinage (42) toutes les arêtes latérales (3a) de la pièce (1) sont d'abord approximativement rectifiées à la dimension finie ;
    - ensuite une lunette (50) avec un évidement (51) de forme sensiblement semi-circulaire pour recevoir la pièce (1) est appliquée contre la pièce (1) ;
    - la lunette (50) étant en place, se produit l'usinage suivant des côtés longitudinaux (3) de la pièce (1) approximativement jusqu'à la dimension finie ;
    - finalement, la lunette (50) est retirée de la pièce (1) et la pièce (1) est rectifiée.
  10. Rectifieuse pour la rectification de pièces en forme de barres, qui présentent une section transversale non ronde, formée par des lignes planes et/ou courbes et qui présentent des côtés frontaux plans s'étendant parallèlement l'un à l'autre, pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 9, comprenant les caractéristiques suivantes :
    a) une première broche de rectification avec un premier disque abrasif et une deuxième broche de rectification avec un deuxième disque abrasif sont disposées en tandem sur une poupée porte-meule commune, qui peut être déplacée de manière commandée sur le banc de la machine, les axes des disques abrasifs appartenant aux deux broches de rectification s'étendant à distance fixe parallèlement l'un à l'autre ;
    b) il est prévu un dispositif de fixation mobile dans lequel les pièces à rectifier sont acheminées l'une derrière l'autre aux disques abrasifs disposés sur la première et la deuxième broche de rectification en vue de leur rectification ;
    c) deux unités de serrage qui sont disposées de manière déplaçable et fixable individuellement ou en commun sur une voie de glissement ont un axe de rotation et d'entraînement commun, qui s'étend parallèlement aux axes des disques abrasifs et forme l'axe C d'une opération de rectification, dans laquelle les pièces sont serrées entre les unités de serrage ;
    d) lors de la rectification, les disques abrasifs se trouvant sur les broches de rectification sont avancés dans la direction X s'étendant perpendiculairement à l'axe C contre les pièces, caractérisée en ce que les caractéristiques supplémentaires suivantes sont prévues :
    e) la direction de déplacement de la poupée porte-meule (10) s'étend perpendiculairement à l'axe de rotation et d'entraînement commun (30) ;
    f) la première broche de rectification (12) et la deuxième broche de rectification (13) sont disposées l'une au-dessus de l'autre et de manière latéralement décalée parallèlement l'une à l'autre par rapport à la distance horizontale à la voie de glissement (5), la première broche de rectification (12) étant située plus haut et plus près de la voie de glissement (5) que la deuxième broche de rectification (13) ;
    g) le dispositif de fixation est disposé entre deux dispositifs de serrage réalisés sous forme de poupées porte-pièces (7a, 7b) de manière à pouvoir tourner autour d'un axe de rotation parallèle à l'axe de rotation et d'entraînement commun (30), et présente sur sa périphérie plusieurs points de serrage (40) pour recevoir les pièces (1) à rectifier.
  11. Rectifieuse selon la revendication 10, dans laquelle le dispositif de fixation (6) est réalisé sous forme de disque de temporisation circulaire.
  12. Rectifieuse selon la revendication 10, dans laquelle le disque de temporisation peut être entraîné par le biais d'un entraînement à la fois dans la direction avant (A) et dans la direction arrière.
  13. Rectifieuse selon l'une quelconque des revendications 10 à 12, dans laquelle le dispositif de fixation (6) présente au moins trois points de serrage (40) qui sont réalisés sous forme de dispositifs de préhension de chargement (24) ayant chacun deux mâchoires de serrage (24a).
  14. Rectifieuse selon l'une quelconque des revendications 10 à 13, comprenant les caractéristiques suivantes :
    a) des mâchoires de serrage (8a, 8b) sont supportées dans les poupées porte-pièces (7a, 7b) dont les surfaces de serrage sont tournées l'une vers l'autre,
    b) chaque poupée porte-pièce (7a, 7b) présente un entraînement en rotation à moteur électrique pour les mâchoires de serrage (8a, 8b) se trouvant sur celle-ci ;
    c) il est prévu un dispositif de commande avec la fonction possible de mettre en mouvement de rotation synchrone et en phase les deux mâchoires de serrage (8a, 8b) autour de l'axe de rotation et d'entraînement commun (30), et avec la fonction supplémentaire possible de serrer la pièce en forme de barre (1) par rapprochement des mâchoires de serrage contre les côtés frontaux (2) de la pièce en forme de barre (1),
    d) une pièce (1) maintenue par les deux poupées porte-pièces (7a, 7b) se trouvant dans la région d'usinage du deuxième disque abrasif (15).
  15. Rectifieuse selon la revendication 14, dans laquelle les mâchoires de serrage (8a, 8b) sont pourvues d'une garniture de friction (9a, 9b) pour l'application contre les côtés frontaux (2) de la pièce en forme de barre (1).
  16. Rectifieuse selon l'une quelconque des revendications 10 à 15, dans laquelle le premier disque abrasif (14) et le deuxième disque abrasif (15) présentent un espacement l'un de l'autre et sont disposés l'un par rapport à l'autre de telle sorte que le premier disque abrasif (14) ait terminé son opération de rectification avant que le deuxième disque abrasif (15) ne commence son opération de rectification.
  17. Rectifieuse selon l'une quelconque des revendications 10 à 16, dans laquelle le premier disque abrasif (14) et le deuxième disque abrasif (15) présentent un espacement l'un de l'autre et sont disposés l'un par rapport à l'autre de telle sorte qu'au moins pendant un intervalle de temps, le premier disque abrasif (14) ainsi que le deuxième disque abrasif (15) effectuent leurs opérations de rectification en parallèle dans le même temps.
  18. Rectifieuse selon l'une quelconque des revendications 10 à 17, dans laquelle la position relative de l'axe de la broche (14c) du premier disque abrasif (14) par rapport à l'axe de la broche (15a) du deuxième disque abrasif (15) peut être ajustée.
  19. Rectifieuse selon l'une quelconque des revendications 10 à 18, dans laquelle le premier disque abrasif est réalisé sous forme de double disque abrasif, et se compose de deux disques abrasifs individuels rotatifs (14a, 14b) qui se trouvent suivant le même axe à une distance axiale D l'un de l'autre et viennent en prise avec leurs côtés larges tournés l'un vers l'autre lors de l'opération de rectification autour de la pièce en forme de barre (1), qui s'étend ainsi parallèlement à l'axe de rotation du premier disque abrasif et est rectifiée au niveau de ses côtés frontaux (1) par une rectification double face.
  20. Rectifieuse selon l'une quelconque des revendications 10 à 18, dans laquelle le premier disque abrasif (14) est réalisé en tant que double disque abrasif en forme de fourche en section transversale et présente des garnitures abrasives qui viennent en prise pendant l'opération de rectification autour de la pièce en forme de barre (1), laquelle s'étend ainsi parallèlement à l'axe de rotation du premier disque abrasif et est rectifiée au niveau de ses côtés frontaux (1) par une rectification double face.
  21. Rectifieuse selon la revendication 19 ou 20, dans laquelle les garnitures abrasives du double disque abrasif rectifiant les deux côtés frontaux (2) de la pièce (1) présentent dans leur région périphérique extérieure une zone annulaire extérieure respective (21a, 21b) avec un revêtement de dégrossissage et une zone annulaire intérieure respective (22a, 22b) avec un revêtement de finition, la distance axiale entre les deux zones annulaires extérieures augmentant vers l'extérieur.
  22. Rectifieuse selon l'une quelconque des revendications 10 à 21, dans laquelle le deuxième disque abrasif (15) présente une largeur B qui est au moins aussi grande que la longueur L de la pièce (1).
  23. Rectifieuse selon la revendication 22, dans laquelle le contour périphérique (15b) du deuxième disque abrasif (15) surmontant la longueur L de la pièce en forme de barre est configuré de manière à s'écarter de la forme cylindrique et correspond au contour longitudinal de la pièce en forme de barre rectifiée.
  24. Rectifieuse selon la revendication 22, dans laquelle le contour périphérique (15b) du deuxième disque abrasif (15) est également façonné en fonction de la forme d'un biseau frontal (2a) ou d'un arrondi frontal (2b), qui doit être rectifié sur la pièce en forme de barre (1).
  25. Rectifieuse selon l'une quelconque des revendications 10 à 24, dans laquelle une lunette (50) est associée à chaque région de serrage (40) dans le disque de temporisation (6b) et peut être approchée de celle-ci, laquelle lunette peut être appliquée contre la pièce (1) pendant la rectification avec le deuxième disque abrasif (15) en vue de son support.
  26. Rectifieuse selon la revendication 25, dans laquelle la lunette (50) présente un évidement (51) de section transversale semi-circulaire en tant que région d'appui pour l'appui contre la pièce (1) à rectifier.
  27. Rectifieuse selon la revendication 25 ou 26, dans laquelle la lunette (50) peut être appliquée contre la pièce ou écartée de celle-ci de manière commandée par le biais d'entraînements électriques, hydrauliques ou pneumatiques.
EP08750189A 2008-02-14 2008-05-08 Procédé et rectifieuse pour la rectification de pièces en forme de barres Active EP2107959B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008009124A DE102008009124B4 (de) 2008-02-14 2008-02-14 Verfahren zum Schleifen von stabförmigen Werkstücken und Schleifmaschine
PCT/EP2008/055693 WO2009100771A1 (fr) 2008-02-14 2008-05-08 Procédé et rectifieuse pour la rectification complète de pièces courtes et/ou en forme de barres

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JP5231329B2 (ja) * 2009-05-22 2013-07-10 本田技研工業株式会社 カムシャフトを加工するための支持方法及びその装置
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DE102015010942B4 (de) * 2015-08-18 2023-11-09 Emag Holding Gmbh Verfahren und Vorrichtung zur Schleif- und Feinstbearbeitung
CN107900805B (zh) * 2017-11-18 2019-07-02 金陈敏 一种汽车配件的外圆磨削装置
CN109834583B (zh) * 2019-02-19 2024-02-20 广州市敏嘉制造技术有限公司 一种用于加工直线导轨滑块的磨削工装
CN111823136B (zh) * 2020-07-16 2022-08-05 徐州徐工液压件有限公司 一种用于多头磨抛设备的多点同轴工件支撑托辊结构
CN112372384B (zh) * 2020-10-27 2022-08-19 宝鸡瑞熙钛业有限公司 一种高分子合金棒材成型处理系统

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BRPI0806075B1 (pt) 2019-12-03
WO2009100771A1 (fr) 2009-08-20
CN101610874B (zh) 2013-05-08
ES2408658T3 (es) 2013-06-21
JP5027259B2 (ja) 2012-09-19
JP2010510898A (ja) 2010-04-08
US8475229B2 (en) 2013-07-02
DE102008009124B4 (de) 2011-04-28
DE102008009124A1 (de) 2009-11-26
BRPI0806075A2 (pt) 2011-08-30
EP2107959A1 (fr) 2009-10-14
CN101610874A (zh) 2009-12-23
US20110195635A1 (en) 2011-08-11
RU2441739C2 (ru) 2012-02-10
RU2009120199A (ru) 2010-12-10

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