EP2490859B1 - Schleifmaschine sowie verfahren zum schleifen und entgraten - Google Patents

Schleifmaschine sowie verfahren zum schleifen und entgraten Download PDF

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Publication number
EP2490859B1
EP2490859B1 EP10768752.7A EP10768752A EP2490859B1 EP 2490859 B1 EP2490859 B1 EP 2490859B1 EP 10768752 A EP10768752 A EP 10768752A EP 2490859 B1 EP2490859 B1 EP 2490859B1
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EP
European Patent Office
Prior art keywords
grinding
workpiece
grinding wheel
machine
axis
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Not-in-force
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EP10768752.7A
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German (de)
English (en)
French (fr)
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EP2490859A1 (de
Inventor
Berthold Stroppel
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Schaudt Mikrosa GmbH
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Schaudt Mikrosa GmbH
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Publication of EP2490859A1 publication Critical patent/EP2490859A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • 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
    • B24B19/12—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 for grinding cams or camshafts
    • B24B19/125—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 for grinding cams or camshafts electrically controlled, e.g. numerically controlled
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
    • B24B49/04—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/12—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving optical means
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins

Definitions

  • the invention relates to a grinding machine for grinding a workpiece, in particular cams, having a machine bed, a grinding wheel which has a profile with a grinding area extending substantially parallel to the axis of rotation of the grinding wheel, a grinding spindle on which the at least one grinding wheel is arranged and is arranged movably on the machine bed, and with a control unit for controlling the grinding process.
  • the invention further relates to a method for grinding a workpiece, in particular cams, on a holder.
  • Such a grinding machine is out of the WO 2009/023979 A1 known.
  • the known grinding machine has a machine bed on which a workpiece holding device is accommodated with a headstock and a tailstock for receiving workpieces.
  • a tool holder for receiving and driving grinding wheels is also provided, with which the workpieces can be edited. Furthermore, the known grinding machine has a measuring device which is designed to measure the recorded workpieces without contact. From the GB 2 208 275 A a grinding wheel assembly is known in which about a first grinding wheel is permanently fixed to a spindle, wherein a second grinding wheel can be additionally releasably secured to the spindle. One of the two grinding wheels can be used for roughing, the other for fine machining.
  • a workpiece holding device which has on one side a workpiece headstock, which sets the camshaft in the desired rotation about its longitudinal axis, and on the other side a tailstock, which ensures that the camshaft during the machining is always aligned and centered.
  • the grinding wheels or the corresponding grinding spindles are movable within the xz plane relative to the camshaft.
  • the axes or directions x and z are mentioned, they always mean the two axes which span the plane which forms the machine bed.
  • the z-axis extends parallel to the longitudinal extent of the workpiece, here e.g. the camshaft, and the x-axis as a perpendicular axis, which corresponds to a movement of a tool on the corresponding workpiece from the side to or away.
  • a direction perpendicular to the x and z axes is also referred to as the y axis or direction. It therefore runs perpendicular to the machine bed.
  • the grinding of the cams directly on the shaft is performed for the purpose of accuracy, so that the cams are formed exactly with respect to the shaft.
  • the grinding of individual cams is also becoming more and more applicable, as the manufacturers of camshafts now succeed in being able to fit the individual cams very precisely onto a shaft.
  • the exact grinding of the individual cams is done individually or as groups of several cams, which are usually processed on a workpiece holder, usually a mandrel, in a grinding machine.
  • the present invention is therefore based on the object of providing a grinding machine for grinding a workpiece and a method for grinding a workpiece, in which either the formation of burrs is avoided or the deburring is enabled within the same grinding machine during or after the grinding process.
  • this object is achieved in a grinding machine according to the aforementioned type in that the grinding wheel has at least one profile section which is not parallel to the axis of rotation of the grinding wheel, and in that the control unit is adapted, based on position information of positions of edges of the workpiece in Direction of a longitudinal axis of the workpiece to move the grinding wheel in the direction of the longitudinal axis such that toward the end of the grinding of the workpiece successively the edges of the workpiece with the at least one profile section of the grinding wheel deburred or chamfered.
  • the combination of the invention profiled grinding wheels with the control unit according to the invention has the advantage that during the grinding process, preferably towards the end of this grinding process, the corresponding oblique profile section which is not parallel to the axis of rotation of the grinding wheel, comes against the edge of the ground workpiece and depending on the positioning
  • the grinding wheel mechanically removes the burr from this edge or even anvil the edge of the workpiece.
  • the positions of the workpieces and their edges are precisely determined beforehand, so that the alignment of the grinding wheels along the workpieces for these deburring or Fas steps can be optimally adjusted.
  • the grinding wheel has a roof profile with two profile sections which do not run parallel to the axis of rotation of the grinding wheel and between which a grinding area extending substantially parallel to the axis of rotation of the grinding wheel is arranged.
  • roof profile is here to be understood in the cross section of a grinding wheel, which cuts the grinding wheel in a plane containing both its axis of rotation and a radius to be recognized depression in the abrasive material.
  • the course of this depression is such that from one edge of the grinding wheel, parallel to the axis of rotation in the direction of the other edge of the grinding wheel seen, in front and behind a larger radius of the grinding wheel is present than in an intermediate region, these areas are connected by a not parallel to the axis of rotation of the grinding wheel transition, so that the resulting cross-sectional profile is reminiscent of the shape of a roof.
  • the provision of the grinding wheel with two profile sections, which do not run parallel to the axis of rotation of the grinding wheel, so that the shape of a roof profile results in cross section, has the advantage that thus two, in particular outer, edges of a workpiece, in particular cams, deburred or can be chamfered.
  • different displacement positions of the grinding wheels along the z-axis are necessary, so that in one displacement position, the first edge and in a second displacement position, the second edge of the workpiece can be processed.
  • the control unit is designed such that it sets both the one and the other displacement position based on the position information of the positions of the edges of the workpiece for the grinding wheel.
  • Both the grinding of a workpiece, in particular a cam, as well as the deburring or chamfering of two edges of a workpiece can be carried out in a grinding process by the grinding wheels with the roof profile as well as with the control unit according to the invention.
  • the at least one profile section is formed such that the distance from the axis of rotation of the grinding wheel of each point in the profile along the extension of the profile section to the vertex decreases.
  • This refinement has the advantage that the grinding region of the grinding wheel, which is generally arranged in the middle region, is closer to the axis of rotation than the outer edges of the at least one profile section, so that when the grinding wheel is moved in the direction of the z-axis while the contact of the grinding wheel is maintained Grinding area with the workpiece ultimately the at least one profile section comes into contact with the edge of the workpiece to be ground.
  • This can at least one Then remove profile section according to existing burr and / or chamfer the existing edge of the workpiece.
  • the grinding machine has a data input for receiving the position information.
  • a data input by the grinding machine for recording the position information has the advantage that it is thus possible to transmit the determined position data of the workpieces directly into the grinding machine, where they are then made available to the control unit independently. Complex inputting or transferring the data in other ways is therefore not necessary, which allows a higher enforcement speed and automation.
  • the grinding machine has a measuring device for determining the position information.
  • a measuring device for determining the position information. This has the advantage that the workpieces to be machined need not be extra transferred to a separate device to be measured thereon, whereupon the data must then be adapted and transmitted.
  • the measuring device is accordingly adapted to the spatial conditions within the grinding machine and is able to determine the corresponding positions in a suitable form.
  • the measuring device is configured to determine the position information without contact, in particular by distance determination by means of a laser or an initiator.
  • This has the advantage that this position or distance determination is comparatively fast.
  • a mechanical scanning of the workpieces would be very slow.
  • a laser makes it possible to determine all necessary position data in the sub-second range by simply and quickly scanning or scanning the workpieces to be processed.
  • the workpieces are received on a holder and the measuring device is configured to determine at least a first position relative to a longitudinal stop of the holder of the workpieces.
  • the measuring device is configured to determine at least a first position relative to a longitudinal stop of the holder of the workpieces.
  • the measuring device is configured to determine all positions relative to the longitudinal stop of the holder of the workpieces.
  • This position determination has the advantage for the grinding process that the control unit according to the invention thus has absolute data on all workpieces, so that each workpiece can be approached individually, which increases the flexibility of the grinding machine according to the invention in the form of their possible grinding processes.
  • the measuring device is configured to determine the remaining positions relative to one another.
  • the relative position indication is advantageous for the grinding process of the grinding machine according to the invention if the control unit according to the invention activates the grinding machine or the corresponding grinding wheels in such a way that the workpieces are to be processed one after the other. For this purpose, the grinding machine then only requires data as it passes from one workpiece to the next. There are then no further calculations necessary, so that a simple displacement of the grinding wheels or grinding spindles can be done on the basis of the position data in the form of relative information.
  • the measuring device is arranged outside of an interior of the grinding machine.
  • the arrangement in particular as a separate device away from the grinding devices, has the advantage that the measuring process for determining the position information can take place as a time-neutral element in the entire process sequence of grinding. This is because measuring, or determining the position information of a workpiece, e.g. a camshaft, can take place simultaneously to a running grinding operation within the grinding machine. Once this grinding process has been completed, the workpiece, which has already been measured in the meantime, can be inserted directly into the now ready grinding machine and ground and processed on the basis of the parallel position information. An idle time, in which the grinding machine can not operate because a measurement of the workpieces takes place, is therefore not available.
  • the measuring device is arranged within an interior of the grinding machine.
  • Both measuring device and grinding machine are arranged in a space in the grinding machine, wherein the measuring device in particular carries out the determination of the position information on a workpiece already clamped in the grinding machine. This minimizes the errors that can occur in transferring the workpieces from an external measuring device into the grinding machine, since the position information here relates directly to the position within the grinding machine and is not relative to a particular section of the workpiece, e.g. incorrect insertion into the grinder may lead to incorrect positions.
  • control unit is designed such that the edges of the workpiece are deburred or chamfered with the at least one profile section of the grinding wheel only after 50 to 95%, in particular after 60 to 80% of the total processing time.
  • the advantage of this embodiment of the control unit according to the invention is that so initially the general Grinding can take place with the grinding area of the grinding wheel, without an additional interaction between the inclined profile sections and the workpiece takes place. Namely, such an interaction also means a higher load for the corresponding inclined profile sections and consequently a higher material abrasion and wear on the grinding wheel. Since arranging the at least one profile section on the edge of the workpiece to be ground is particularly concerned with removing the burr formed or by chamfering this edge, a relatively short contact between the at least one profile section and the corresponding edge of the workpiece is sufficient.
  • the workpiece is preferably initially positioned in the central area of the grinding wheel, i. in the grinding area, without any interaction between the inclined profile sections with the edges.
  • the Entgratungs- or Anfas suits thus takes place advantageously only towards the end of the entire grinding process. However, it is still part of the normal grinding process, as the grinding area remains in contact with the workpiece.
  • Another object of the present invention is a method for grinding a workpiece, in particular cams, on a holder with a grinding machine according to the previous embodiments.
  • This method makes it possible to optimally use the above-mentioned grinding machine according to the invention.
  • an exact determination of the position of the workpieces is required.
  • the grinding wheels are then directly controlled, so that they are optimally aligned for a general grinding operation and towards the end of the grinding process of a workpiece in the direction of the longitudinal axis of the holder of the at least one workpiece, i. in the direction of the z-axis, be moved so that the oblique profile sections deburr both one, preferably also another edge of the workpiece or chamfer this.
  • a grinding machine described in more detail below is designated in its entirety by the reference numeral 10 below.
  • the grinding machine 10 has a machine bed 12, two grinding spindle sets 14 and 14 ', and a workpiece headstock 16 and a tailstock 18, which in an interior 19 are arranged. Between workpiece headstock 16 and tailstock 18, a workpiece 20 in the form of a camshaft 22 is clamped here.
  • This camshaft 22, or generally the workpiece 20 can be rotated about its longitudinal axis 24 by the workpiece headstock 16 and tailstock 18 and is moved during this movement by well-known methods by the laterally along the x- and z-axis movable grinding spindle sets 14 and 14 '. machined or ground.
  • the grinding spindle sets 14 and 14 ' are both constructed identically in the present case. Their respective structure is exemplary in the Fig. 2 illustrated by the grinding spindle set 14, but applies to the grinding spindle set 14 'accordingly.
  • the grinding spindle set 14 consists of a first grinding spindle 26 and a second, in this case smaller grinding spindle 28. These grinding spindles each consist of a spindle block 30 and 32 and a grinding wheel 34 and 36, respectively at grinding wheel receivers 35 and 37 of the grinding spindles 26 and 28 arranged.
  • the grinding wheel 34 is configured as a large grinding wheel and the grinding wheel 36 as a comparatively small grinding wheel.
  • the grinding spindle 28 with the grinding wheel 36 can be designed to be larger or the same size as the grinding spindle 26 with the grinding wheel 34.
  • the orientation of the grinding spindle 28 with respect to the grinding spindle 26 is such that the grinding wheels 36 and 34 in accordance with the view of Fig. 2 come to lie one above the other, which manifests itself in relation to the entire grinding machine 10 so that the two grinding wheels 34 and 36 come to lie within a plane which is perpendicular to a direction of the z-axis.
  • the grinding spindles 28 and 28 ' are arranged via a carrier 40 on the grinding spindle 26 and 26' in the case shown at the spindle blocks 30 and 30 '.
  • This carrier 40 has, as in Fig. 2 can be seen, in this case, a collar 42 and a holder 44.
  • the holder 44 serves for direct reception and attachment of the grinding spindle 28 and thus arranges them on the sleeve 42.
  • the collar 42 is configured according to the spindle block 30 of the grinding spindle 26, arranged thereon and mounted pivotably about a rotation axis 46 of the grinding spindle 26.
  • This protective flap 47 is in the in Fig. 2 shown position so that it releases the viewer facing the area of the grinding wheel 34, so that a workpiece which is located on this side facing the viewer, can be ground.
  • the protective flap 47 is also pivotable about the axis of rotation 46 or rotatable by being rotatably mounted on an axle 50.
  • the latter is connected via a web 52 to the carrier 40, in particular to the holder 44 in the present embodiment.
  • the protective flap 47 is also pivoted with a pivoting movement of the grinding spindle 28 about the rotation axis 46 of the grinding spindle 26, so that the area of the grinding wheel 34 facing the viewer in the Fig. 2 is now covered by the protective flap 47. This is for example in the plan view of Fig. 3 to see.
  • the position of the grinding spindle 26 and grinding spindle 28 is such that the grinding wheel 34 of the grinding spindle 26 is freely arranged for machining and grinding of the workpieces 20 is located in the Fig. 3
  • the grinding wheel 36 of the grinding spindle 28 is arranged so that it is used for machining and grinding the workpiece 20 , here the camshaft 22, can be used.
  • This arrangement of a large grinding wheel 34 for pre-grinding a camshaft 22 and a small grinding spindle 28 pivotally mounted on the grinding spindle 26 of the large grinding wheel 34 has the grinding wheel 36 the advantage that a significant space saving is obtained by this combination.
  • the advantages resulting from the arrangement of the grinding wheels 36 and 34 within the aforementioned common spindle plane, which is perpendicular to a direction of the z-axis, are described in more detail below.
  • Fig. 4a and 4b illustrate again the principle of the pivotable small grinding wheel 36 with respect to the large grinding wheel 34th
  • Fig. 4a shows here in the Fig. 1 and Fig. 2 shown state in which the small grinding wheel 36 with the grinding spindle 28 with respect to the views of Fig. 1 . 2 and 4a 4b is arranged above the large grinding wheel 34.
  • the large grinding wheel 34 is hereby in Fig. 4a shown right area covered by the protective flap 47, but released in the left area, so that a grinding of workpieces, here for example a cam 48 of a camshaft 22, can take place.
  • the grinding spindle set can be moved by the carriage 38 correspondingly in the x direction and then take place a rotation about the rotation axis 46 of the grinding spindle 26, as indicated here by the double arrow 50.
  • the small grinding wheel 36 is pivoted back in accordance with the above in reverse, so that again according to the pivoting movement, indicated by the double arrow 50, the small grinding wheel 36 occupies a position above the large grinding wheel 34, as in Fig. 4a is shown.
  • 10a and 10b is also an embodiment of the grinding machine 10 according to the Fig. 4a and 4b shown.
  • the grinding wheels 34 and 36 and the protective flap 47 can be seen in their respective positions before and after the pivoting of the grinding spindle 28.
  • the grinding machine according to the invention is particularly suitable for closely adjoining workpieces on a holder, for example in the exemplary embodiments illustrated here Fig. 5
  • the cams 48 'and 48 "on the camshaft 22 simultaneously grind or process, whereby one of the cams 48' and 48" is in each case machined by a set of grinding spindle 14 or 14 '.
  • FIG. 5 For this purpose, the positioning of the grinding spindle sets is shown, in which the cams 48 'and 48 "are pre-ground on the camshaft 22 with the large grinding wheels 34, 34', for which the grinding spindle sets are moved together in the direction of the z-axis and each at the height of one Cam 48 ', 48 "are aligned such that the large grinding wheels 34, 34' respectively oppose one of these cams 48 'and 48" with respect to the direction of the z-axis
  • an orientation with respect to FIG is made on the x-axis, so that the grinding wheels 34, 34 'can come into a corresponding contact with the cam 48', 48 "so as to be able to perform a grinding operation according to the known methods.
  • the large grinding wheels 34 and 34 ' can ride together in this process of pre-grinding the cams 48' and 48 "except for a few mm in the z-axis direction, thereby simultaneously pre-grinding this cam pair 52 consisting of the cams 48 'and 48 "is made possible.
  • the minimum distance between the two grinding wheels 34 and 34 ' is given in the aforementioned collapse in the direction of the z-axis only by the width of the protective flaps 47 and 47'.
  • the grinding wheel sets 14 and 14' may be spaced from the camshaft 22 in the x-axis direction, whereupon the grinding spindles 28 and 28 'are engaged with the small grinding wheels 36 and 36'.
  • the cam 48' and 48 " can be used.
  • Fig. 7 shows the schematic structure of a camshaft 22 with the shaft 54 on which the cams 48 are arranged.
  • two cams 48 'and 48 "always form a cam pair 52.
  • This cam pair is characterized in that the associated cams 48' and 48" are relatively close together, at least closer than the distance of one cam pair to another Cam pair, and that the respective cams 48 'and 48 "are identically arranged and aligned within such a pair of cams 52 in their arrangement with respect to rotation about the shaft 54.
  • This alignment by the longitudinal stop 56 can thus be used to determine the position of the cam 48 on the shaft 54 to within a few microns accurate relative to this longitudinal stop 56.
  • This determination can be made so that position information of the cam 48 are determined, all relating to the longitudinal stop 56, or even so that a corresponding cam 48 is described in its position so that the position information on a previous cam 48 on refer to the shaft 54.
  • the position of a cam could be 48 " Fig. 7 be described by the distance to the longitudinal stop 56, or as position information with respect to the previous cam 48 'are given.
  • the necessary for the detection and processing of the position information devices are in the Fig. 9 shown.
  • the measuring device 90 can be arranged both as a separate device outside the grinding machine 10, and be arranged in the interior 19 of the machine, there to make the position determination of the cam 48 directly on the clamped camshaft 22.
  • the former variant has the advantage that the positions of the cams can be determined while the grinding machine 10 is already being operated with another grinding operation. Thus, non-productive times caused by the measurement and thus blocking the grinding machine 10 for the grinding process are avoided.
  • the other variant with the arrangement of the measuring device 90 within the grinding machine 10 has the advantage that no additional space outside the grinding machine 10 is necessary. In addition, errors that may occur during clamping of the camshaft 22 in the grinding machine 10 and can occur through the displacement of the previously determined position, avoided.
  • the determination of the position by the measuring device 90 may according to the invention preferably by non-contact methods, in particular by laser or initiators, take place.
  • non-contact methods in particular by laser or initiators
  • other methods of non-contact and touching measurement of workpieces known to a person skilled in the art such as e.g. mechanical scanning, conceivable.
  • the data determined by the measuring device 90 are forwarded to a data input 92 of the grinding machine 10, as indicated schematically by the arrow 91. From the data input 92, the data then passes, as indicated schematically by the arrow 93, into a data processing 94 of the grinding machine 10.
  • the data processing 94 prepares the data according to methods known to a person skilled in the art and subsequently supplies them to a control unit 96, as indicated by the arrow 95.
  • the control unit 96 is used for direct control of the grinding wheel sets 14 and 14 '. This involves both the movement of the grinding wheel sets 14 and 14 'on the machine bed 12 and, as explained above, the positioning of the grinding spindles 28 and 28' by pivoting and the operation of the grinding wheels 34, 34 ', 36 and 36'.
  • the control of the grinding spindle sets 14 and 14 'by the control unit 96 is in Fig. 9 schematically indicated by the arrows 97 and 97 '.
  • the arrows 91, 93 and 95 represent the basic course of the position information in accordance with the statements made above.
  • the determination of the position information of the individual cams 48 of the camshaft 22 is on the one hand advantageous in that the grinding spindle sets 14 and 14 'due to this position information by a control unit not shown here can be aligned so that a grinding of the cam 48, as it through the Fig. 5 and 6 indicated and described in the context, can be performed. Since the grinding wheels can not be arbitrarily wide due to the dense moving together of the grinding wheels 34 and 34 'or 36 and 36', which is in the range of 10 mm, a certain accuracy of the position information is already necessary here.
  • a grinding wheel 58 which is a particular embodiment of the small grinding wheels 36 and 36 ', respectively.
  • This grinding wheel 58 is adapted for machining a workpiece 60, for example a cam 48, at this.
  • this grinding wheel 58 has a so-called roof profile 64 in its abrasive material 62.
  • This roof profile 64 is characterized by a depression in the abrasive material 62 in the workpiece 60 facing side. This results in relation to the rotation axis of the grinding wheel 58 not further shown here more peripheral circumferential grinding surfaces 66 and a more inner circumferential grinding surface 68.
  • These grinding surfaces 66 and 68 are by oblique, not parallel to the axis of rotation of the grinding wheel 58 aligned profile sections 70 and 72 connected as a transition. For this offset between the ends 66 and 68 and from the oblique profile sections 70 and 72, this results in the view of Fig. 8a to 8c roof profile 64 to be seen.
  • This roof profile 64 thus has, through the abrasive material 62, a grinding region 74 which coincides with the inner end 68 and those oblique profile sections 70 and 72 which are suitable for deburring and chamfering, as will be described in more detail below.
  • the term "roof profile” here, and hereinafter generally within the scope of this invention also includes profiles in grinding wheels with only one profile section 70, 72 and also with a non-parallel to the axis of rotation grinding area 74 and includes.
  • this grinding wheel 58 is first aligned with the workpiece 60 so that it is preferably processed exclusively by the grinding area 74.
  • This positioning is exemplary in Fig. 8a shown. To successfully achieve this alignment, the position information as described in more detail above is used.
  • edges 76 'and 76 "of the workpiece 60 often form a certain amount of burr not shown here.
  • the grinding wheel 58 is now moved in a direction of the z-axis, here by way of example by the arrow 78, the transition from the grinding region 74 into the profile section 70 in the region of a vertex 80 hits the corresponding ridge-tipped edge 76 'of the workpiece 60
  • This positioning is exemplary in Fig. 8b shown. This can take place after the actual grinding process or towards the end of the grinding process, in particular at a time which corresponds to approximately 60 to 100% of the total machining time of the individual workpiece.
  • a method according to the invention for grinding such workpieces 60, in particular cams 48, runs so that first the positions of the workpieces 60 on an in Fig. 8a to 8c not shown in detail holder, such as the shaft 54 can be determined. This can be done by a measuring device 90. This position information is then forwarded to the control unit 96 of the grinding machine 10, which controls the grinding process and thus also the grinding spindles 26, 26 ', 28 and 28' of the grinding wheel sets 14 and 14 '. If necessary, processing and adaptation of the position information by the data processing 94 can take place beforehand.
  • this control unit 96 controls, for example, the grinding spindles 28 and 28 ', or thus indirectly the grinding wheel 58, or for example the grinding wheels 36 and 36', in the direction of the z-axis as well as in the direction of the x-axis on the Workpiece 60 too.
  • the workpiece 60 is first ground by the grinding portion 74 of the grinding wheel 58, after which the grinding wheel 58 then according to the previously made statements in connection with the Fig. 8b and 8c in the direction of the z-axis, as indicated by the arrows 78 and then 82, to deburr the edges 76 'and 76 "of the workpiece 60.
  • These steps of the method along the z-axis are based, such as has already been performed on the exact position information determined in the first step of determining the position of the workpieces 60.
  • the deburring and / or chamfering can be carried out time-neutral in the grinding machine 10, whereby an additional, usually a further machine requiring step for deburring and / or chamfering of the workpieces 60, as previously performed, is eliminated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP10768752.7A 2009-10-20 2010-10-14 Schleifmaschine sowie verfahren zum schleifen und entgraten Not-in-force EP2490859B1 (de)

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DE102014204807B4 (de) 2014-03-14 2016-12-15 Erwin Junker Grinding Technology A.S. Verfahren und Vorrichtung zum Schleifen von Großkurbelwellen
CN104339236B (zh) * 2014-10-30 2017-02-08 湖北中航精机科技有限公司 一种去毛刺机
CN105150123A (zh) * 2015-09-25 2015-12-16 泰州市宏祥动力机械有限公司 用于凸轮去毛刺的砂轮
JP6766400B2 (ja) * 2016-03-28 2020-10-14 株式会社ニデック 眼鏡レンズ加工装置、及び眼鏡レンズ加工プログラム
DE102016012727A1 (de) * 2016-10-24 2018-04-26 Blum-Novotest Gmbh Messsystem zur Messung an Werkzeugen in einer Werkzeugmaschine
CN108057753A (zh) * 2017-12-18 2018-05-22 莱纳斯工业设备（苏州）有限公司 一种万向滚刷去毛刺机
CN110539221A (zh) * 2019-10-17 2019-12-06 北京第二机床厂有限公司 适应于高精度伺服阀阀芯的磨削同步去毛刺机构及方法
CN110977668B (zh) * 2019-12-25 2024-05-24 南通德鑫数控机床有限公司 一种数控全自动一次成型凸轮轴毛坯打磨机床
CN112296788B (zh) * 2020-11-02 2021-09-24 电子科技大学中山学院 机械加工用金属工件打磨装置及其顶尖结构
CN114227389B (zh) * 2021-12-29 2023-04-18 东风汽车有限公司东风日产乘用车公司 凸轮轴磨削方法

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US8790155B2 (en) 2014-07-29
CN102596503B (zh) 2015-07-15
WO2011048014A1 (de) 2011-04-28
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US20120252316A1 (en) 2012-10-04
DE102009051586A1 (de) 2011-04-28

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