EP3914420A1 - Method for honing machining of an opening in a workpiece - Google Patents
Method for honing machining of an opening in a workpieceInfo
- Publication number
- EP3914420A1 EP3914420A1 EP21711499.0A EP21711499A EP3914420A1 EP 3914420 A1 EP3914420 A1 EP 3914420A1 EP 21711499 A EP21711499 A EP 21711499A EP 3914420 A1 EP3914420 A1 EP 3914420A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- honing
- opening
- length
- elements
- diameter
- 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
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000003754 machining Methods 0.000 title claims abstract description 27
- 238000005259 measurement Methods 0.000 claims description 32
- 230000008569 process Effects 0.000 claims description 27
- 239000004575 stone Substances 0.000 claims description 22
- 238000007493 shaping process Methods 0.000 claims description 16
- 230000008878 coupling Effects 0.000 claims description 14
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 230000033001 locomotion Effects 0.000 claims description 14
- 238000005520 cutting process Methods 0.000 claims description 13
- 210000001015 abdomen Anatomy 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 4
- 230000003534 oscillatory effect Effects 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000005068 cooling lubricant Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
-
- 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
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/08—Honing tools
- B24B33/087—Honing tools provided with measuring equipment
Definitions
- the invention relates to a honing device and a method for machining a workpiece opening.
- a shape and surface of a workpiece opening to be machined is modified.
- a shape in the range from a few mpi to a few 100 mpi in recent years.
- the macroscopically viewed circular cylindrical shape becomes the A shape deviating from an ideal circular cylinder is impressed on the workpiece opening or bore.
- the shape deviation is in the range from typically 10 ⁇ m to a maximum of a few 100 ⁇ m, in particular less than 100 ⁇ m based on the diameter.
- a certain starting hole shape is either assumed or the starting hole shape is determined in the course of a measurement upstream of the honing process, which is typically carried out at a separate measuring station. Based on this initial bore shape, a specific honing process is then determined and then carried out. By means of this honing process, the workpiece opening is converted into a target shape. Following the honing process, a check is made, if necessary, to determine whether the processing result corresponds to the desired target shape. If deviations are found, the machining process will be adjusted when machining the next hole.
- the aim of the present invention is now to provide a honing device and a honing method by means of which, in particular, shaping honing can be carried out as efficiently and inexpensively as possible.
- the aim is also to increase the precision of machining and, if possible, to avoid rejects.
- this object is achieved by a honing device for machining a workpiece opening according to claim 1 and by a honing method according to claim 6.
- the honing device comprises a honing tool, a link rod or a coupling rod, and a spindle.
- the articulated rod or the coupling rod are therefore provided as alternatives to one another, with one articulated rod being provided as a rule.
- the honing tool is designed with a plurality of radially adjustable honing elements that are distributed around the circumference of the honing tool.
- Honing elements include honing stones and a substructure. Honing stones are the parts of the honing elements that cause material removal through abrasive contact with the surface to be machined.
- the honing tool is articulated to the spindle via the toggle rod. If a coupling rod is provided, the honing tool is rigidly connected to the spindle, the axis of the spindle coupling rod and honing tool therefore necessarily collide during processing.
- the articulated coupling can be formed via a first pivot joint and a second pivot joint. The swivel joints form the connection to the spindle and the honing tool at the ends of the joint rod. The articulated coupling enables the compensation of an axial offset between the spindle and the workpiece opening.
- the spindle is designed to be driven by a drive unit.
- the drive unit is held stationary and sets the spindle and thus the honing device in motion.
- This movement is the typical honing movement in which the honing device is set in an oscillatory translational movement with a superimposed rotational movement with respect to the workpiece which comprises the workpiece opening to be machined.
- the honing device comprises a measuring device for measuring the diameter of the workpiece opening with at least one air measuring nozzle arranged on the honing tool.
- the air measuring nozzle is typically arranged in an air measuring strip which is arranged, for example, between two honing elements. Typically, several air measuring nozzles are distributed around the circumference of the honing tool.
- the air measuring nozzles are fed with compressed air via compressed air lines. It can also be one or more
- Air measuring nozzle pairs can be provided, in particular the air measuring nozzles of a pair being arranged diametrically opposite one another.
- the honing device also has an electromechanical feed system.
- the honing elements can be advanced in the radial direction via the electromechanical infeed system.
- the feed system comprises a force measuring unit and is designed to feed the honing elements with a predeterminable force against an opening wall of the workpiece opening to be machined.
- the feed system is designed in such a way that the honing elements can be brought into contact with the opening wall with a defined force.
- the contact pressure of the honing stones of the honing elements can thus be precisely adjusted.
- the local material removal depends on the local contact pressure or the contact force.
- the feed system feeds the honing elements with a defined force; it is provided that the honing elements arranged distributed around the circumference are all fed with the same force.
- the honing device further comprises a signal converter which is designed to convert a pneumatic measurement signal detected via the air measurement nozzle into an electrical signal. Air measuring nozzles direct a jet of compressed air onto the opening wall to be measured. Based on the resulting dynamic pressure or the dynamic pressure change, a pneumatic measurement signal is generated which characterizes the local diameter.
- the signal converter is arranged on the honing device, i.e. on the spindle, articulated rod or honing tool.
- the honing device in the sense of the present invention consists of the parts that move with respect to the workpiece during machining with the typical honing movement (rotation plus oscillatory translational movement).
- the signal converter was arranged in the area of the machine construction that was stationary with respect to the workpiece, for example in the area of the drive of the honing spindle.
- this requires a rotary feedthrough for the compressed air lines and, on the other hand, the pneumatic measurement signal must cover the axial length of the spindle, the articulated rod and the honing tool.
- the longer the distance to be covered by the pneumatic measurement signal the slower the detection of the local diameter or the more the signal is delayed or even falsified.
- an average value of the opening diameter was measured for dynamic reasons, with averaging over the circumference and the axial extent of the opening.
- the amplitude of the measuring signal which can be assigned to a real local bore diameter, was falsified when the measuring nozzle moved dynamically.
- a determination of the local diameter with resolution in the axial direction was not possible with conventional systems during the honing process or at best with reduced axial speeds that were not suitable for series production.
- no assignment could be made between them in the conventional devices determine the timing of the input of the measurement signals and a position in the workpiece opening.
- the signal converter is arranged on the articulated rod, this has the advantage that it is arranged outside the workpiece bore / opening to be machined, but close to the workpiece opening, so that the line length and therefore the inertia of the pneumatic measurement signal is low. It can be advantageous to arrange the signal converter as close as possible to the joint (ie close to the joint) of the joint rod with which it is connected to the honing tool.
- the signal converter can be arranged on the honing tool itself in order to achieve the shortest possible path for the pneumatic signal from the measuring nozzle to the signal converter.
- An arrangement on the honing tool itself requires additional shielding measures for the signal converter, since the latter is located in an area during the honing process in which it is exposed to cooling lubricant.
- the measurement accuracy is maximized by arrangement in this area, which can be desirable depending on the accuracy requirements. It can also be advantageous to arrange the signal converter on the spindle. For example, it can be arranged in the area of the spindle around the joint with which the spindle is coupled to the joint rod. This means that the signal converter is not influenced by changes in the position of the toggle rod.
- the signal converter can communicate the measurement signals to a control unit in a wired or wireless manner.
- the control unit in turn, can use the measurement signals to control the electromechanical delivery system and / or the lifting movement accordingly.
- the honing tool can comprise at least two air measuring nozzles. If 2 air measuring nozzles are provided, these can be arranged diametrically opposite one another. At least 3 air measuring nozzles can also be provided. Several air measuring nozzles can be arranged evenly distributed around the circumference of the honing tool. The measurement accuracy can be increased in this way. Individual local roundness errors are leveled out in this way.
- the air measuring nozzles can be arranged in one plane, that is to say at the same axial height. Air measuring nozzles can be provided at different axial positions. All arranged measuring nozzles can be fed to a common evaluation, whereby a measured value is produced. The pneumatic signal can therefore be averaged before it is converted into an electrical signal.
- the line routing and / or the signal converter can be designed accordingly.
- the measurements of individual measuring nozzles can also be evaluated separately from one another. If the measurements of individual measuring nozzles or measuring nozzle pairs are evaluated separately from one another, diameter dimensions are available at different locations of the bore at the same time.
- Honing stones of the honing elements can have an extension in the axial direction that is smaller than a machining radius of the honing tool.
- the axial extent can be less than 70%, in particular 50%, in particular 33% of the machining radius of the honing tool.
- the machining radius of the honing tool means the radius of the honing stones in the maximally radially outwardly advanced state.
- the honing stones can have a minimum length of 10 mm, in particular 12 mm, in particular 15 mm.
- a minimum length leads to a minimum service life, the specified length specification enabling the device or the method to be used on an industrial scale.
- a deformation length can be defined as the length along the axial extension that begins at the beginning of the diameter expansion and ends at the end of the diameter reduction.
- the honing stones used or the area equipped with cutting coating
- the honing stones used preferably have a length (axial extent) of at most 70% of the deformation length, in particular 60%, in particular 50%, in particular 40% of the deformation length. This allows the desired contour to be created reliably.
- a widening length can be defined as the length along the axial extension that begins at the beginning of the diameter widening and at the end of the diameter widening or the End of the hole ends.
- the honing stones used, or the area of the honing elements equipped with cutting coating preferably has a length (axial extent) of at most 70% of the expansion length, in particular 60%, in particular 50%, in particular 40% of the expansion length. It can further be provided that honing is carried out with an overflow, so that the honing stones move out of the opening at the end of the enlarged diameter.
- the overflow can be between 10% and 90% of the length of the honing stones.
- bottle-like target shapes i.e. target shapes that have a circular cylindrical first section with a first constant diameter and a circular cylindrical second section with a second larger constant diameter, which are connected via a transition section that includes a widening diameter
- target shapes that have a circular cylindrical first section with a first constant diameter and a circular cylindrical second section with a second larger constant diameter, which are connected via a transition section that includes a widening diameter
- the honing stones used, or the area of the honing elements equipped with a cutting coating preferably has a length (axial extent) of at most 90% of the bottle belly length, in particular 80%, in particular 60%, in particular 50% of the bottle belly length.
- honing is carried out with an overflow, so that the honing stones move out of the opening at the end of the enlarged diameter.
- the overflow can be between 10% and 90% of the length of the honing stones.
- the delivery system can comprise an electromechanical motor.
- the electromechanical motor can be coupled via a slot in the spindle to a feed rod, which runs in the spindle, of a feed system of the honing device.
- the delivery system can, for example, provide that the electromechanical motor can set a threaded worm in rotation, which is in engagement with a corresponding thread-bearing counterpart.
- the thread-bearing counterpart can, for example, be coupled to move in the axial direction with the feed rod, but can be rotated with respect to this via a corresponding bearing.
- the delivery system is coupled to the signal converter, for example via a control unit.
- the infeed system can vary the infeed force of the honing elements as a function of the measurement signals with high infeed dynamics.
- the individual honing elements can be unconnected with one another, that is, they can be moved individually. It can be provided that all the honing elements of the honing tool can be advanced radially by means of a common infeed cone. One honing stone can be present for each honing element. It can also be provided that a honing element comprises several honing stones.
- this is converted from an initial shape into a target shape by a shaping honing machining step.
- the initial shape and the target shape differ in their shape in such a way that at least 2 places the workpiece opening has a different diameter difference between the original shape and the target shape.
- the shaping honing process for changing the workpiece opening from the initial shape to the target shape is carried out using a honing device as described in this application.
- the honing elements for generating the different diameter differences are advanced against the opening wall to be machined with locally different forces. At different axial positions, the honing elements are therefore pushed against the opening wall with different forces.
- the feed force thus varies over the lifting or lowering movement of the honing tool.
- measuring signals are recorded by means of the measuring device, which characterize the local diameter of the workpiece opening.
- the force with which the honing elements are advanced against the opening wall to be processed is adapted during the honing process as a function of the measurement signals recorded during the honing process.
- the force with which the honing elements are fed against the opening wall to be machined, the feed force thus varies depending on the measurement signals.
- the feed force is not only varied in a controlled manner in a predetermined manner depending on the axial position of the honing tool in the workpiece opening, but the measurement signals recorded during the honing process are taken into account when determining the feed force to be applied.
- the feed force can be kept constant at a respective axial position over the duration of the processing, but it is also possible for the feed force to vary over time at a respective axial position. Typically, the feed force is reduced at a respective axial position in order to achieve less material removal when approaching the target shape and thus to get closer to the target shape.
- the local infeed force can therefore be determined and set based on the current position of the honing tool, the target shape and the respective recorded measurement signals.
- the measurement signals characterize the current state or diameter of the workpiece opening.
- Conventional honing processes are based either on a previously determined shape of the opening or on an assumption about the shape and based on this have determined a honing process.
- the infeed force can be dynamically adapted to the removal that is still locally required to achieve the target shape on the basis of the instantaneous actual shape determined in the process (characterized by the measurement signals) and the immediate comparison with the target shape.
- the initial shape of the workpiece opening can be recorded or checked by means of a measuring stroke in which the honing elements have no material-removing contact with the bore wall, which is carried out with the honing tool of the honing device.
- a separate measuring stroke can be used with increased accuracy be performed. By using the honing tool itself, this can be done in a time-saving and efficient manner.
- the measuring stroke can be carried out in a rotating manner (with a rotating honing tool).
- a rotating measuring stroke can ensure more precise measurements.
- the measuring stroke can be carried out at rotational speeds of more than 2001 / min. Any circumferential dimensional fluctuation can thereby be conveyed or averaged out.
- the shape of the workpiece opening can be detected or checked by means of a measuring stroke in which the honing elements have no material-removing contact with the bore wall, which is carried out with the honing tool of the honing device. A comparison can be made with the desired target shape.
- the shaping honing process can include a honing step with a changing stroke length, with a honing step with a pressure force of the honing elements on the honing step that varies over the opening length following the honing step with a changing stroke length.
- the feed force can be kept constant or can also be varied over the length machined per stroke.
- a first pre-machining can be done by machining with a changing stroke length and the final shape by machining with the opening length varying contact pressure.
- the machining with changing stroke length can therefore be part of the shaping machining.
- the target shape can comprise at least one area along a machined length of the workpiece opening which has a larger or smaller diameter than an area in front of and behind in the axial direction.
- the target shape can therefore, for example, have a bulbous design.
- the target shape can also include a local waist.
- Such shapes can be manufactured particularly advantageously by means of the method according to the invention, since this enables locally variable diameters to be created precisely.
- the target shape can comprise a cylindrical area and a conically widening area.
- the target shape can comprise a further cylindrical area with a larger diameter than the other cylindrical area.
- the conical area can lie between the cylindrical areas in the axial direction.
- the conical area can form the transition between the two cylindrical areas.
- the target shape can be designed as a circular cylinder and the initial shape can differ from a circular cylinder shape. In the individual axial planes, the target shapes have a circular cross-section, but the diameter of the individual cross-sections can change over the length of the opening.
- Important target shapes within the meaning of the present invention can be shapes in which the diameter of the respective circular cross-sections increases over the length, however does not decrease again in the longitudinal direction. These can also be referred to as purely expanding forms.
- Important target shapes can also be shapes that can be referred to as bulbous shapes.
- FIG. 1 shows a device according to the invention
- FIG. 2 shows part of a delivery system of the device from FIG. 1;
- FIG. 3 shows conventional honing of a bore
- FIG. 4 shows a correction of a bulging initial shape
- FIG. 5 a creation of a bulbous target shape
- Figure 6 shows the creation of a bottle-like target shape
- FIG. 7 a honing tool
- Figure 8 is an illustration of creating a bulbous target shape
- Figure 9 is an illustration of creating a bottle-like target shape
- FIG. 10 shows the creation of a target shape that widens towards an opening end
- FIG. 11 shows a device according to the invention.
- FIG. 1 shows a honing device 10 for machining a workpiece opening 24.
- the honing device 10 comprises a honing tool 12 with a plurality of radially adjustable honing elements 14 distributed around the circumference of the honing tool 12.
- the honing elements 14 comprise honing stones 32 and a substructure 34
- the honing tool 12 is articulated to the spindle 18 via the toggle rod 16.
- the articulated coupling is formed via a first pivot joint 36 and a second pivot joint 38.
- the pivot joints 36, 38 at the ends of the joint rod 16 form the connection to the spindle 18 and the honing tool 12, the spindle 18 being designed to be set in an oscillatory translational movement with a superimposed rotational movement relative to a workpiece 22 by means of a drive unit 20
- the honing device 10 further comprises a measuring device 26 for measuring the diameter of the workpiece opening 24.
- the measuring device 26 comprises a plurality of air measuring nozzles 28 arranged on the honing tool 12.
- the respective air measuring nozzle 28 is arranged in an air measuring strip 30 which is arranged between two honing elements 14.
- the air measuring nozzles 28 are fed with compressed air via compressed air lines 40.
- the honing device 10 further comprises an electromechanical feed system 42 (FIG. 2), via which the honing elements 14 can be fed in the radial direction R.
- the delivery system 42 comprises a force measuring unit 44 and is designed to deliver the honing elements 14 with a predeterminable force against an opening wall 52 of the workpiece opening 24 to be machined.
- the honing device 10 comprises a signal converter 54 which is designed to convert a pneumatic measurement signal detected via the air measurement nozzle 28 into an electrical signal convert, wherein the signal converter 54 is arranged on the honing device 10.
- the signal converter 54 is arranged on the articulated rod 16. It can also be arranged on the honing tool 12. It can also be arranged on the spindle 18, preferably in the area of the joint 36.
- the signal converter 54 can communicate the measurement signals to a control unit 56 in a wired manner or, as illustrated here, wirelessly.
- the control unit 56 in turn, can use the measurement signals to control the electromechanical delivery system 42 accordingly.
- the honing stones 32 of the honing elements 14 have an extension 66 in an axial direction A, which is shown in FIG. 7. As in the example in FIG. 1, the extension 66 can be smaller than a machining radius 68 of the honing tool 12.
- the infeed system 42 comprises an electromechanical motor 46, in particular which is coupled via a slot 48 in the spindle 18 to an infeed rod 50 of a infeed system 42 of the honing device 10 running in the spindle 18, which is shown in FIG.
- the electromechanical motor 46 can set a screw screw 43 in rotation, which is in engagement with a corresponding thread-bearing counterpart 41.
- the thread-bearing counterpart 41 is in the axial direction A with the feed rod 50 coupled in motion, but rotatable with respect to this via a corresponding bearing 58.
- the individual honing elements 14 are not connected to one another. And as shown in the example of FIG. 7, all the honing elements 14 of the honing tool 12 can be advanced radially by means of a common infeed cone 70.
- One honing stone 32 can be present for each honing element 14.
- FIG. 6 A classic honing process is illustrated in FIG. An initial shape 60 and a target shape 62 are both circular-cylindrical.
- the force F with which the honing elements 14 or honing stones 32 are pressed against the wall 52 of the workpiece opening 24 during this machining is constant over the axial length and the duration of the machining, since the desired material removal is nominally constant at all points of the bore.
- FIG. 5 A honing operation according to the invention is illustrated in FIG.
- the feed force F used varies over the axial extent of the opening 24.
- the arrow with the reference symbol t illustrates that the force F used also varies over time.
- a bulging starting shape 60 is converted into a circular cylindrical target shape 62.
- the infeed force is dynamically minimized at the points in the hole (here in the middle of the hole) where the target diameter is already present.
- FIG. 5 a honing process according to the invention is illustrated in which a circular cylindrical starting shape 60 is converted into a bulbous target shape 62.
- the force F used varies over the axial extent of the opening 24.
- the arrow with the reference symbol t illustrates that the force F used also varies over time.
- the infeed force is dynamically maximized at the points of the hole (here in the center of the hole) where most of the material has to be removed in order to achieve the target shape.
- a circular cylindrical starting shape 60 is converted into a bottle-like target shape 62.
- the bottle-like target shape 62 comprises two circular cylindrical sections with different
- Diameters that are connected by a substantially conical section Diameters that are connected by a substantially conical section.
- the feed force is low in the upper circular cylindrical section, since the required material removal is also low here.
- the feed force is high in the lower circular cylindrical section.
- the starting shape 60 and the target shape 62 each have a different diameter difference between the starting shape 60 and the target shape 62 at at least two points in the workpiece opening 24.
- the shaping honing process to change the workpiece opening 24 from the initial shape 60 to the target shape 62 takes place in each case using a honing device 10 as illustrated in FIG. 1, for example.
- measurement signals that characterize the local diameter of the workpiece opening 24 are recorded by means of the measuring device 26, and the force with which the honing elements 14 are fed against the opening wall 52 to be processed is determined during the honing process as a function of the measurement signals recorded during the honing process adjusted to achieve the target shape.
- the initial shape 60 of the workpiece opening 24 was recorded by means of a measuring stroke in which the honing elements 14 had no material-removing contact with the bore wall and which was carried out with the honing tool 12 of the honing device 10.
- the shape of the workpiece opening 24 is checked by means of a measuring stroke in which the honing elements 14 have no material-removing contact with the bore wall and which is carried out with the honing tool 12 of the honing device 10.
- the openings 24 are shown in sections and halved in FIGS. 8 to 10.
- FIG. 8 shows an illustration of the creation of a bulbous target shape 62.
- a bulbous target shape 62 is created and a Deformation length 100 is defined as the length along the axial extension which begins at the beginning of a diameter expansion 104 and ends at the end of the diameter reduction 106.
- the deformation length 100 is usually less than an opening length 102 (length of the machined opening) but can also extend over the entire opening length 102.
- a region of the honing elements equipped with a cutting coating has the extension 66, which in particular amounts to at most 70% of the deformation length, in particular 60%, in particular 50%, in particular 40% of the deformation length during such processing.
- FIG. 9 shows an illustration of the creation of a bottle-like target shape 62.
- a bottle-like target shape 62 is created which has a circular cylindrical first section 110 with a first constant diameter and a circular cylindrical second section 112 with a second, larger constant diameter, which are connected via a transition section 114 which comprises an expanding diameter.
- a bottle belly length 108 is defined as the sum of the length of the second section 112 with the second, larger constant diameter and the length of the transition section 114. especially 80%, especially 60%, especially 50% the length of the bottle belly.
- it can be honed with an overflow in which the honing stones extend out of the opening at the end of the enlarged diameter.
- the overflow can be between 10% and 90%, in particular 20% to 80%, in particular 30% to
- FIG. 10 shows an illustration of the creation of a target shape that widens towards an opening end 122.
- a target shape 62 that widens towards an opening end 122 is created.
- the widening region 120 opens into the opening end 122.
- a widening length 124 is defined as the length along the axial extent that begins at the beginning of a diameter widening or the widening region 120 and at the end of the opening 122 into which the diameter widening 120 flows, ends.
- the region of the honing elements equipped with a cutting layer can in particular have an axial extension 66 of at most 70% of the widening length 124, in particular 60%, in particular 50%, in particular 40% of the widening length 124. In particular, it can be honed with an overflow.
- the honing elements can therefore extend out of the opening 24 at the end of the enlarged diameter 120, in particular with the overflow between 10% and 90% (10% to 90% of the area equipped with the cutting surface extend out of the opening 24), in particular between 20% and 80%, in particular between 30% to 70%, of the length (extension 66) of the area of the honing elements 14 equipped with a cutting coating.
- FIG. 11 shows a honing device 10 for machining a workpiece opening 24.
- the honing device 10 in FIG. 11 comprises a honing tool 12 and a spindle 18 which are designed similar to those from FIG. Instead of a joint rod 16, the honing device 10 comprises a coupling rod 130, the honing tool 12 being rigidly coupled to the spindle 18 via the coupling rod 130.
- the coupling rod 130 is connected to the spindle 18 and honing tool 12 via rigid coupling devices 136 and 138.
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- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102020106871.9A DE102020106871A1 (en) | 2020-03-12 | 2020-03-12 | Method for honing a workpiece opening |
PCT/EP2021/055763 WO2021180641A1 (en) | 2020-03-12 | 2021-03-08 | Method for honing machining of an opening in a workpiece |
Publications (2)
Publication Number | Publication Date |
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EP3914420A1 true EP3914420A1 (en) | 2021-12-01 |
EP3914420B1 EP3914420B1 (en) | 2022-06-29 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP21711499.0A Active EP3914420B1 (en) | 2020-03-12 | 2021-03-08 | Device and method for honing an opening in a workpiece |
Country Status (3)
Country | Link |
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EP (1) | EP3914420B1 (en) |
DE (1) | DE102020106871A1 (en) |
WO (1) | WO2021180641A1 (en) |
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DE102004051145C5 (en) | 2004-10-20 | 2021-03-18 | Marposs Monitoring Solutions Gmbh | Sensor system for a cutting machine tool and a cutting machine tool with a sensor system |
DE502006007980D1 (en) * | 2006-12-12 | 2010-11-11 | Nagel Masch Werkzeug | Process for fine machining of cylindrical inner surfaces of bores and finishing plant therefor |
DE102007063200B4 (en) * | 2007-12-19 | 2010-10-21 | Kadia Produktion Gmbh + Co. | Method for fine machining at least one workpiece by means of a rotary tool and a fine machining device |
DE102010020931A1 (en) | 2010-05-11 | 2011-11-17 | Gehring Technologies Gmbh | Device for machining a cylinder bore with a geometrically determined and geometrically indefinite cutting edge |
DE102013204714B4 (en) | 2013-03-18 | 2024-06-06 | Elgan-Diamantwerkzeuge Gmbh & Co. Kg | Honing process and honing tool |
DE102017210187A1 (en) * | 2017-06-19 | 2018-12-20 | Elgan-Diamantwerkzeuge Gmbh & Co. Kg | Honing process and processing machine for contour honing |
-
2020
- 2020-03-12 DE DE102020106871.9A patent/DE102020106871A1/en active Pending
-
2021
- 2021-03-08 WO PCT/EP2021/055763 patent/WO2021180641A1/en unknown
- 2021-03-08 EP EP21711499.0A patent/EP3914420B1/en active Active
Also Published As
Publication number | Publication date |
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DE102020106871A1 (en) | 2021-09-16 |
WO2021180641A1 (en) | 2021-09-16 |
EP3914420B1 (en) | 2022-06-29 |
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