EP2490858A1 - Schleifmaschine mit zwei spindelsätzen - Google Patents
Schleifmaschine mit zwei spindelsätzenInfo
- Publication number
- EP2490858A1 EP2490858A1 EP10768918A EP10768918A EP2490858A1 EP 2490858 A1 EP2490858 A1 EP 2490858A1 EP 10768918 A EP10768918 A EP 10768918A EP 10768918 A EP10768918 A EP 10768918A EP 2490858 A1 EP2490858 A1 EP 2490858A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grinding
- spindle
- workpiece
- spindles
- machine according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- 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
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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
- 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 present invention relates to a grinding machine for grinding workpieces, in particular for simultaneous, independent grinding of two closely spaced workpieces, and a method for grinding workpieces on a holder, in particular for simultaneous, independent loops of two closely adjacent arranged workpieces.
- 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 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 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 spindle of the small grinding wheel is arranged according to the grinding spindle of the large grinding wheel so that it can be pivoted about the axis of rotation of the large grinding wheel, or the corresponding grinding spindle.
- This principle is already known from DE 195 16 711 AI. The goal here is that by this set of spindles, ie by the combination of the large and small spindle with the appropriate pivoting mechanism, a considerable space savings is achieved.
- This mutual obstruction of the grinding spindle sets thus makes a more complicated programming of the entire grinding procedure necessary to minimize the loss of efficiency of the grinding machine due to this hindrance.
- the time required by this mutual interference is greater than expected when using two sets of grinding spindles. This would ideally be at least half the time as with the use of only one set of grinding spindles.
- the present invention is therefore an object of the invention to provide a grinding machine, which compared to the known grinding machines of the type mentioned allows a simpler grinding process and can work more efficiently.
- a grinding machine for grinding workpieces in particular for simultaneous grinding of two closely spaced workpieces, with a machine bed, at least two first grinding spindles, which are movable on the machine bed at least in directions substantially parallel extend to the machine bed and each having a grinding wheel and a spindle spindle block, and at least two second grinding spindles, each having a grinding wheel receiving and are pivotally mounted on a support on the spindle block of a first grinding spindle, so that they are pivoted about the axis of rotation of the respective first grinding spindle can, wherein the respective first and second grinding spindles together each form a grinding spindle set, the grinding spindle sets are aligned with each other so that the grinding wheel recordings of the grinding spindles of a grinding spindle set and that of the other grinding spindle set in a direction substantially parallel to the longitudinal axis of the workpiece to face each other, and the two grinding spindles of a grinding spindle set to each other are
- the inventive arrangement of the grinding spindles within a grinding spindle set, or the grinding wheels arranged thereon, so that the grinding wheels are substantially in a common, perpendicular to the longitudinal axis of the workpiece grinding wheel plane, ie in a spanned by the x- and y-axis Level has the advantage that the small grinding spindles of the grinding spindle sets can now also be moved very close together. As a result, compared to the previous minimum distance of about 300 mm now minimum distances in the size range of about 10 mm are possible. This allows, in addition to simplifying the grinding process and its planning, simultaneous grinding of a closely spaced pair of workpieces, e.g. on camshafts in the form of the adjacent cam of a cam pair is present. Thus, the efficiency becomes precisely in this range, i. When grinding closely adjacent pairs of workpieces, significantly increased, since non-productive times, in which a grinding spindle set can not be used due to mutual interference, are avoided.
- the first grinding spindles each have a protective flap, which is also pivoted with the pivoting of the respective second grinding spindle, wherein the respective protective flap is preferably in operative connection with the carrier.
- the grinding spindle sets are independently movable and controllable on the machine bed.
- This embodiment has the advantage that not only, as described above, a common parallel grinding of workpiece pairs, for example occur on camshafts in the form of the cam, is possible, but also depending on the workpiece to be ground, for example, a staggered or opposite method along and on this workpiece is possible.
- the flexibility of the grinding machine is again significantly increased, whereby it represents an extremely versatile and flexible grinding machine in combination with the features of the invention mentioned above.
- the grinding machine has a profile with a substantially parallel to the axis of rotation of the grinding wheel grinding region and at least one profile section which is not parallel to the axis of rotation of the grinding wheel, and a control unit for controlling the grinding process, wherein the Control unit is designed such that, based on position information of positions of edges of the workpiece in the direction of the longitudinal axis of the workpiece during or after grinding of the workpiece, in particular towards the end of grinding of the workpiece, successively deburred the edges of the workpiece with the at least one profile section of the grinding wheel or be chastised.
- 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 inclined profile section which is not parallel to the axis of rotation of the grinding wheel, passes against the edge of the ground workpiece and Depending on the positioning of the grinding wheel, the burr is mechanically removed from this edge or also the edge of the workpiece is angled.
- 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 on a roof profile with two profile sections which are not parallel to the axis of rotation of the grinding wheel and between which a substantially parallel to the axis of rotation of the grinding wheel extending grinding area is arranged.
- “roof profile” here is a cross-section of a grinding wheel that cuts the grinding wheel in a plane that contains both its axis of rotation and a radius to be recognized recess to be understood in the abrasive material.
- the course of this depression is such that seen from one edge of the grinding wheel, parallel to the axis of rotation in the direction of the other edge of the grinding wheel, in front and behind a larger radius of the grinding wheel than in an intermediate region, these areas by a not for Rotation axis of the grinding wheel parallel transition are connected to each other, 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 of cams , deburred or chamfered.
- different displacement positions of the grinding wheels along the z-axis are necessary, so that in the one displacement position, the first edge and in a second displacement position, the second edge of the Workpiece can be edited.
- 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, and the deburring or chamfering of two edges of a workpiece can be performed 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 so that reduces 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.
- This embodiment has the advantage that the grinding area 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.
- it can then remove at least one profile section in accordance with the existing burr and / or chamfer the existing edge of the workpiece.
- the grinding machine on a data input for receiving the position information.
- the provision of 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. 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 contactless, in particular by distance determination by means of laser or an initiator. This has the advantage that this position or distance determination is comparatively fast. In contrast, a mechanical scanning of the workpieces would be very slow. So it makes it possible, e.g. a laser, to determine all necessary position data in the subsecond range by simply, fast driving off or scanning of 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 each other.
- 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 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 the measurement, or the determination of the position information of a workpiece, for example a camshaft, can take place simultaneously with an ongoing 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 disposed 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 when 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 are not relative to a particular section of the workpiece, for example, in case of incorrect insertion in the grinder can lead to wrong positions.
- control unit is designed so that the edges of the workpiece with the at least one profile section of the grinding wheel deburred or chamfered 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 lies in the fact that the general grinding process with the grinding area of the grinding wheel can first take place without an additional interaction between the obliquely running profile sections and the workpiece taking 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 first positioned in the central area of the grinding wheel, ie in the grinding area, without any Interaction between the inclined profile sections takes place 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.
- FIG. 1 shows a grinding machine according to the invention in its entirety as a side view
- Fig. 2 is a detail view of a grinding spindle set according to the invention
- 4a and 4b show a side view of a grinding spindle set according to the invention with the respective different positions of the grinding spindle
- FIG. 5 is a fragmentary detail view of the grinding machine according to the invention of Figures 1 and 3 in a side view with a suitable for pre-grinding of the workpieces positioning of the grinding spindle sets.
- 6 is a fragmentary detail view corresponding to FIG. 5 with a positioning of the grinding spindle sets, suitable for finish grinding of the workpieces,
- FIG. 7 shows a schematic side view of a camshaft as a workpiece of the grinding machine according to the invention
- FIG. 9 shows the grinding machine from FIG. 1 with an additional schematic illustration of a measuring device according to the invention, a data input and a control unit, and FIG
- 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 are arranged in an interior space 19. 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 by the workpiece headstock 16 and tailstock 18 about its longitudinal axis 24 be and is machined during this movement according to well-known methods by the laterally along the x- and z-axis movable grinding spindle sets 14 and 14 'or ground.
- the grinding spindle sets 14 and 14 ' are both constructed identically in the present case. Their respective construction is illustrated by way of example in FIG. 2 on the basis of the grinding spindle set 14, but applies correspondingly to the grinding spindle set 14 '.
- grinding spindle set 14 and grinding spindle set 14 are the same reference numerals used for the components of the two, each differing only by a dash. Accordingly, although not explicitly mentioned each time, the features for one component of the grinding wheel set 14 apply equally to the corresponding component of the other wheel set 14 'and vice versa, unless otherwise stated.
- 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 to grinding wheel 35 and 37 of the Abrasive spindles 26 and 28, respectively.
- 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 made larger or the same size as the grinding spindle 26 with the grinding wheel 34th
- the orientation of the grinding spindle 28 with respect to the grinding spindle 26 is such that the grinding wheels 36 and 34 according to the view of Fig. 2 come to lie one above the other, which manifests itself in relation to the entire grinding machine 10 that the two Abrasive wheels 34 and 36 come to lie within a plane which is perpendicular to a direction of the z-axis.
- the grinding spindles 26 and 26 ' are arranged on a carriage 38 or 38' which is not shown in greater detail in FIG. 2 but can be seen in FIG.
- 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 can be seen in Fig. 2, in this case, a sleeve 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 arranged such that it releases the area of the grinding wheel 34 facing the viewer, so that a workpiece which is located on this side facing the observer can be ground.
- the protective flap 47 is likewise pivotable or rotatable about the axis of rotation 46 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 swiveled about the axis of rotation 46 of the grinding spindle 26 when the grinding spindle 28 pivots, so that the region of the grinding wheel 34 facing the viewer is now covered by the protective flap 47 in FIG. This can be seen for example in the plan view of FIG.
- the position of the grinding spindle 28 is present after the pivoting process within the entire grinding machine 10. While in the view of Fig. 1, the position of the grinding spindle 26 and grinding spindle 28 is such that the grinding wheel 34 of the grinding spindle 26 is arranged for machining and grinding of the workpieces 20 freely, is in the position shown in Fig. 3 the Grinding wheel 36 of the grinding spindle 28 with respect to the direction of the x-axis between the workpiece 20 and the larger grinding wheel 34 of the grinding spindle 26. Accordingly, the grinding wheel 36 of the grinding spindle 28 is arranged so that it is used for machining and grinding the workpiece 20, here Camshaft 22, can be used.
- Fig. 4a and 4b illustrate again the principle of the pivotable small grinding wheel 36 with respect to the large grinding wheel 34.
- Fig. 4a shows here the state shown in Figs. 1 and Fig.
- the small grinding wheel 36 with the Grinding spindle 28 is disposed above the large grinding wheel 34 with respect to the views of Figs. 1, 2 and 4a and 4b, respectively.
- the large grinding wheel 34 is in this case in the right area shown in Fig. 4a 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. If this pre-grinding is completed with the large grinding wheel 34, 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.
- FIGS. 10a and 10b likewise show an embodiment of the grinding machine 10 corresponding to FIGS. 4a and 4b.
- 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 placing closely adjacent workpieces on a holder, e.g.
- the cams 48 'and 48 "on the camshaft 22 are simultaneously to be grinded or machined, whereby in each case one of the cams 48' and 48" is guided by a grinding spindle set 14 or 14 '. processed.
- FIG. 5 shows the positioning of the grinding spindle sets in which the cams 48 'and 48 "are pre-ground on the camshaft 22 with the large grinding wheels 34, 34' - Axis moved together and aligned on each of the height of a cam 48 ', 48 "so that the large grinding wheels 34, 34' in each case one of these cams 48 'and 48" facing with respect to the direction of the z-axis in that subsequent or simultaneous alignment with respect to the x-axis is made so that the grinding wheels 34, 34 'can come into corresponding contact with the cams 48', 48 "so as to perform a grinding operation according to the known methods can.
- the corresponding orientations within the direction of the x-axis to conform to the shape of the workpieces, here the cams 48 as the camshaft 22 rotates about its longitudinal axis 24, take place according to well-known methods and parameters.
- the large grinding wheels 34 and 34 ' can move together in this process of pre-grinding the cams 48' and 48 "except for a few mm in the direction of the z-axis, thereby simultaneously pre-grinding this pair of cams 52 which consists 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 collisions 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 'are pivoted about the axes of rotation 46 and 46' of the grinding spindles 26 and 26 'according to the previously described embodiments, so that the grinding wheels 36 and 36' come to lie above the machine bed at a height, or are spaced therefrom accordingly, the grinding wheels 36 and 36 'can now be used for machining the workpieces 20, in this case the cams 48' and 48 ".
- the orientation of the grinding spindle sets 14 and 14 'in the direction of the x-axis is done according to known methods and with appropriate parameters that the grinding wheels 36 and 36' always the necessary and desired contact with the Workpieces 20, here the cams 48 'and 48 "have, in order to achieve a successful machining and grinding.
- 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 to each other, 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 a few pm exactly 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. So could e.g. the position of a cam 48 "of Fig. 7 may be described by the distance to the longitudinal stop 56, or may be indicated as positional information with respect to the previous cam 48 '.
- the necessary for the detection and processing of the position information devices are shown in FIG. 9.
- 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. In addition, however, other known to a person skilled in the art of non-contact and touching the measuring of the workpieces, such as 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 spindle sets 14 and 14 '.
- the determination of the position information of the individual cams 48 of the camshaft 22 is on the one hand to the advantage that the grinding spindle sets 14 and 14 'due to this position information can be aligned by a not shown here control unit so that a grinding of the cam 48, as indicated for example by FIGS. 5 and 6 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. Furthermore, due to this exact position information, a deburring or chamfering of the workpieces 20, in this case the cams 48, is made possible, as will be described in more detail below in connection with FIGS. 8a to 8c.
- a grinding wheel 58 can be seen, which represents a particular embodiment of the small grinding wheels 36 and 36 ', respectively.
- This grinding wheel 58 is for machining a workpiece 60, e.g. a cam 48, aligned with this.
- this grinding wheel 58 has a so-called roof profile 64 in its grinding 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, the roof profile 64 to be seen in the view of FIGS. 8a to 8c results.
- 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, below and generally in the context of this invention also profiles in grinding wheels with only one Profile section 70, 72 as well as with a non-parallel to the axis of rotation grinding area 74 means and includes. If the finish grinding of a workpiece 60, for example a cam 48, is to be accomplished analogously to the small grinding wheels 36 with such a grinding wheel 58, this grinding wheel 58 is first aligned with the workpiece 60 so that it is preferably processed exclusively by the grinding area 74 becomes. This positioning is shown by way of example in FIG. 8a. 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 in detail.
- 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 one in Fig. 8a to 8c holder not shown in detail, for example, 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 determines the grinding process and thus also the grinding spindles 26, 26 ', 28 and 28' of the grinding spindle sets 14 and 14 '. controls. 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.
- Fig. 8a then first the workpiece 60 is ground by the grinding portion 74 of the grinding wheel 58, whereupon the grinding wheel 58 then according to the previously made in connection with Figs. 8b and 8c in the direction of the z-axis, as it indicated by the arrows 78 and then 82, to deburr the edges 76 'and 76 "of the workpiece 60.
- These steps of the z-axis method are based on the exact position information, as previously stated determined in the first step of determining the position of the workpieces 60.
- the deburring and / or chamfering can be performed time-neutral in the grinding machine 10, whereby an additional, usually requiring a further machine 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202009014739U DE202009014739U1 (de) | 2009-10-20 | 2009-10-20 | Schleifmaschine mit zwei Spindelsätzen |
PCT/EP2010/065467 WO2011048013A1 (de) | 2009-10-20 | 2010-10-14 | Schleifmaschine mit zwei spindelsätzen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2490858A1 true EP2490858A1 (de) | 2012-08-29 |
EP2490858B1 EP2490858B1 (de) | 2013-07-31 |
Family
ID=43646422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10768918.4A Not-in-force EP2490858B1 (de) | 2009-10-20 | 2010-10-14 | Schleifmaschine mit zwei spindelsätzen |
Country Status (7)
Country | Link |
---|---|
US (1) | US8602840B2 (de) |
EP (1) | EP2490858B1 (de) |
JP (1) | JP5612110B2 (de) |
CN (1) | CN102596499B (de) |
DE (1) | DE202009014739U1 (de) |
ES (1) | ES2428364T3 (de) |
WO (1) | WO2011048013A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011102113A1 (de) * | 2011-05-20 | 2012-11-22 | Schaudt Mikrosa Gmbh | Mehrscheiben-Schleifmaschine mit zumindest zwei Spindelsätzen |
DE102014106924A1 (de) * | 2014-05-16 | 2015-11-19 | Thyssenkrupp Presta Teccenter Ag | Verfahren zur Herstellung einer gebauten Nockenwelle |
CN109909558A (zh) * | 2018-09-29 | 2019-06-21 | 华安正兴车轮有限公司 | 一种用于切除毛边的旋切机构及其工作方法 |
CN110193758B (zh) * | 2019-06-25 | 2024-04-12 | 苏州经贸职业技术学院 | 一种磨床送料定位装置 |
CA3048076A1 (en) * | 2019-06-25 | 2020-12-25 | C.M.E. Blasting & Mining Equipment Ltd. | Grinding tool for grinding buttons on a rock drill bit |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3724698A1 (de) * | 1987-07-25 | 1989-02-02 | Schaudt Maschinenbau Gmbh | Schleifkopf |
DE4103090C1 (de) * | 1991-02-01 | 1992-08-27 | Erwin 7618 Nordrach De Junker | |
DE4426452C1 (de) * | 1994-07-26 | 1995-09-07 | Erwin Junker | Verfahren und Maschine zum Schleifen von Nocken mit konkaven Flanken |
DE19516711A1 (de) | 1995-05-06 | 1996-11-07 | Schaudt Maschinenbau Gmbh | Werkzeugmaschine mit zwei Arbeitsspindeln |
GB9918211D0 (en) * | 1999-08-04 | 1999-10-06 | Clarke Robert C | Oscilating wheel head for grinding machines |
JP3787248B2 (ja) * | 1999-09-30 | 2006-06-21 | 株式会社ジェイテクト | 工作機械の定寸加工制御方法及びその装置 |
MXPA02004140A (es) * | 1999-10-27 | 2002-10-11 | Unova Uk Ltd | Metodo para rectificar munones de ciguenal. |
DE10205212A1 (de) * | 2002-02-08 | 2003-08-21 | Heller Geb Gmbh Maschf | Meßeinrichtung für Maschinen zum Bearbeiten von Werkstücken, insbesondere von Kurbelwellen, Nockenwellen |
DE102004009352B4 (de) * | 2004-02-26 | 2006-01-19 | Thyssen Krupp Automotive Ag | Vorrichtung zum Herstellen einer Fertigkontur eines Werkstücks durch Schleifen und Verfahren dazu |
CH701168B1 (de) * | 2007-08-17 | 2010-12-15 | Kellenberger & Co Ag L | Verfahren und Bearbeitungsmaschine zur Behandlung von Werkstücken. |
-
2009
- 2009-10-20 DE DE202009014739U patent/DE202009014739U1/de not_active Expired - Lifetime
-
2010
- 2010-10-14 ES ES10768918T patent/ES2428364T3/es active Active
- 2010-10-14 JP JP2012534634A patent/JP5612110B2/ja active Active
- 2010-10-14 CN CN201080047526.5A patent/CN102596499B/zh not_active Expired - Fee Related
- 2010-10-14 WO PCT/EP2010/065467 patent/WO2011048013A1/de active Application Filing
- 2010-10-14 EP EP10768918.4A patent/EP2490858B1/de not_active Not-in-force
-
2012
- 2012-04-20 US US13/452,490 patent/US8602840B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011048013A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2490858B1 (de) | 2013-07-31 |
US8602840B2 (en) | 2013-12-10 |
JP2013508175A (ja) | 2013-03-07 |
CN102596499B (zh) | 2014-12-31 |
US20120258648A1 (en) | 2012-10-11 |
JP5612110B2 (ja) | 2014-10-22 |
WO2011048013A1 (de) | 2011-04-28 |
ES2428364T3 (es) | 2013-11-07 |
CN102596499A (zh) | 2012-07-18 |
DE202009014739U1 (de) | 2011-03-10 |
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