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EP3271111B1 - Procédé et machine à rectifier pour rectifier pièces avec rainures - Google Patents

Procédé et machine à rectifier pour rectifier pièces avec rainures Download PDF

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Publication number
EP3271111B1
EP3271111B1 EP16709434.1A EP16709434A EP3271111B1 EP 3271111 B1 EP3271111 B1 EP 3271111B1 EP 16709434 A EP16709434 A EP 16709434A EP 3271111 B1 EP3271111 B1 EP 3271111B1
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EP
European Patent Office
Prior art keywords
crush
dressing
grinding wheel
grinding
profiling
Prior art date
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Active
Application number
EP16709434.1A
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German (de)
English (en)
Other versions
EP3271111A1 (fr
Inventor
Erwin Junker
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Erwin Junker Maschinenfabrik GmbH
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Erwin Junker Maschinenfabrik GmbH
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Publication of EP3271111A1 publication Critical patent/EP3271111A1/fr
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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
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • 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
    • B24B49/006—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 taking regard of the speed
    • 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
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • 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
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • B24B19/022—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for helicoidal grooves
    • 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
    • B24B49/003—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 acoustic 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
    • 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
    • B24B49/16—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 taking regard of the load
    • 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
    • B24B49/18—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 taking regard of the presence of dressing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/06—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels
    • B24B53/07—Devices or means for dressing or conditioning abrasive surfaces of profiled abrasive wheels by means of forming tools having a shape complementary to that to be produced, e.g. blocks, profile rolls

Definitions

  • the invention relates to a method and a grinding machine for grinding grooves having workpieces according to the preamble of claims 1 and 6, such as GB 2 143 448 A known.
  • the grinding wheel is profiled so that when grinding the groove in the workpiece, the outer positive shape of the profiling of the grinding wheel as a negative mold in Form of the groove formed in the workpiece.
  • Crushing which is often referred to as roll-forming, has long been established and proven to be a special method of rotary dressing for accurate profiling of metal- or ceramic-bonded diamond or CBN grinding wheels. Crushing is especially useful when large quantities of tools have to be provided with fine profiles.
  • the known crushers typically include crimping rollers which are either driven and frictionally drag the grinding wheel when both are engaged or disengaged, but the grinding wheel is such that when both are engaged, the grinding wheel by friction takes the Crushierrolle, ie can rotate. Because in recent years increasing tendency for ever larger and more powerful grinding machines with more powerful grinding spindle drives, the driving of Crushierrollen has prevailed by the driven grinding wheel, ie the Crushierrolle runs smoothly with, when the grinding wheel with the Crushierrolle is engaged. So that a high profiling accuracy can be achieved at the grinding wheel during crushing, the crushing parameters have to be selected and used with great care.
  • Crushiervorgang takes place at relatively high pressures in the engagement region of Crushierrolle and grinding wheel, so that is deformed by possibly occurring deformations of the grinding wheel, the profile to be formed during or after dressing.
  • the parameters of Crushierrolle and grinding wheel in the strict sense or Crushierrollenspindel and grinding wheel spindle in the broader sense must therefore be selected and implemented so that the aforementioned deformations can be avoided or even excluded. If certain parameters such. B. the relative feed between the grinding wheel and Crushierrolle or in the engaging area of both resulting so-called Crushierdruck too large, a so-called chattering can occur, which is to avoid the Crushiervorgang under all circumstances.
  • a dressing device for a numerically controlled profile or surface grinding machine is described.
  • a Crushing device is arranged on the profile or surface grinding machine, which has its own drive.
  • the dressing of a plurality of profiled grinding wheels, which are arranged in the direction of the axis of rotation side by side, so that each profiled grinding wheel is associated with a dressing roller.
  • the dressing roll on the grinding wheel is rolled under pressure so as to crush and break up the abrasive grains, the peripheral speeds of the grinding wheel and the crushing roller being equal.
  • DE 1 284 867 A is a universal grinding machine with turret described on which in the wheelhead a so-called curl device is provided, with which the required for forming or plunge grinding profile is rolled on the circumference of a grinding machine.
  • the implementation of the curling process in terms of profiling in terms of Crushierens is not described.
  • the profiling of the grinding wheel by means of this known curling device takes place on the actual grinding machine, it is additionally carried out in a single operation between grinding operations or turning, drilling, friction and thread cutting operations likewise carried out on the universal grinding machine.
  • a dressing device for CBN grinding wheels which machines the grinding wheel so that it can be used equally well for pre-grinding as for finish grinding.
  • the dressing wheel has so-called crushing grains and individual abrasive grains which are mixed in the dressing layer.
  • the dressing takes place in one process and describes a dressing of axial end faces of a cup-shaped grinding wheel.
  • the object of the present invention is therefore to provide a method and a grinding machine for grinding grooved workpieces, in which a crushing dressing of a grinding wheel to be profiled, taking into account substantial crushing parameters, is integrated into an automated grinding process and a high quality of the ground workpiece can be achieved in achieving a long service life of the grinding wheel.
  • a method of grinding workpieces having grooves is described.
  • the workpieces are in particular helically or threaded workpieces, the grooves also straight grooves or radially circumferential grooves such.
  • B. punctures can be.
  • the workpiece is clamped and its groove is ground by means of a grinding wheel, which has a profiling which corresponds to the cross section of the groove. Due to the grinding process, as a result of wear of the grinding wheel can change their profiling, which is why the grinding wheel is reprofiled by crushing.
  • Nachprofilieren here is a so-called Fertigcrushieren or Fertigprofilieren be understood.
  • the profile is present on the grinding wheel and is restored in terms of accuracy and sharpness, so to speak.
  • a Nachprofilier-Crushieren the grinding wheel thereby also driven Crushierrolle by their control based on a measurement of speed and current consumption of the respective drives the grinding wheel and the Crushierrolle, based on a relative feed during Crushieren between the grinding wheel and the Crushierrolle takes place.
  • the relative feed is preferably selected such that, for reasons of efficiency during crushing and during the entire grinding process, the relative feed is a maximum relative feed, at which no disadvantageous process conditions still occur.
  • At least rotational speed and current consumption are measured as essential crushing parameters for post-profiling crushing and used for controlling the process of crushing.
  • the current consumption stands for the performance, which according to the requirements pull the drives both the grinding wheel and the Crushierrolle or the power which is to be supplied to them so that the desired, defined Crushierparameter can be met.
  • a profiling Crushieren the grinding wheel by means of Crushierrolle which is usually not driven, by controlling only the grinding wheel drive based on its measured speed and current consumption, the profiling Crushing is performed before the start of the grinding process.
  • profiling-Crushing is to be understood that receives a not yet profiled grinding wheel in a first operation before the start of the actual grinding process by means of a Crushierrolle the profiling so that the grooves can be ground into the workpiece by means of this grinding wheel.
  • Profilier-Crushieren corresponds to a Vorcrushieren or pre-profiling or rough profiling.
  • the profiling-crushing is carried out by means of the same crushing roller which is used for post-profiling-crushing.
  • the Crushierrolle several, preferably at least two tread grooves, which are applied as a negative mold for generating the positive profiling on the grinding wheel successively.
  • the provision of several crushing grooves in the crushing roll has the advantage that a single crushing roll can be used for several crushing operations.
  • a crushing role Worked out groove by groove, so to speak.
  • the last Crushier groove further profiling of the grinding wheel, in particular by way of Nachprofilier-Crushierens for reasons of accuracy no longer allow this Crushierrolle must be replaced and possibly worked up again.
  • profiling Crushing allows the measurement of speed and current consumption of the drive of the grinding wheel optimal performing the Crushiervorgangs means of a maximum relative feed, in which adverse process conditions such. As a rattle does not occur.
  • a larger dressing volume than the post profiling crushing is dressed by the grinding wheel.
  • the first side of the profiling on the grinding wheel is approached with a first groove profile flank, the approach to the first groove profile flank being monitored by an existing starting sensor system and a possibly occurring activation of the drive in the form of a drive pulse to the crushing roller.
  • This is followed by the approach to a second flank of the arranged in the Crushierrolle groove, which is also monitored by the Anfahrsensik the possible successful connection of a drive pulse to the Crushierrolle.
  • a lateral process of the grinding wheel until the grinding wheel is moved on the profile center of the groove located in the Crushierrolle.
  • the maximum relative feed ie the permissible feed during crushing, is realized by monitoring the current consumption and thus the grinding spindle power, whereby the current consumption is continuously measured.
  • the CNC controller then calculates and sets the maximum relative feed, ie an optimum feed rate between the crushing roller and the grinding wheel, with regard to the efficiency of the crushing process.
  • the grinding wheel If the grinding wheel has received its profiling during the profiling-Crushierens, then it can then be used in the normal grinding process for grinding the corresponding groove in the workpiece or re-used or post-profiling-crushed to increase the accuracy. Since the grinding wheel wears while the grinding wheel is worn, but the profile shape is essentially maintained within narrow limits, the grinding wheel must be crushed between the grinding sections to be determined on the basis of the wear rate of the profiling of the grinding wheel by re-profiling. A profiling crash is thus no longer required at this stage of the process.
  • both the grinding wheel and the crushing roller are each driven.
  • profiling-crushing an edge of the groove in the crushing roller is first approached, whereby the process is monitored by the starting sensor system and the measurement of the power consumption at the two drives of the grinding wheel and the crushing roller (grinding spindle / crushing spindle).
  • grinding spindle / crushing spindle This is followed by a start of the second flank of the groove, wherein also by the starting sensor and the measurement of the power consumption of the two drives of the grinding wheel and the Crushierrolle, d. H. on whose spindles, this process is monitored.
  • This is followed by a procedure of the grinding wheel on the profile center.
  • the procedure differs from profiling-crushing in that during the after-profiling crushing, the grinding wheel and the crushing roller are driven and speed-controlled and, in addition, the power consumption is monitored in each case.
  • the Crushierrolle and the grinding wheel with respect to their speeds are coordinated so that their peripheral speeds in the Nachprofilier-Crushieren in a defined by a peripheral surface of the Crushierrolle defined depth of the groove have a defined relationship to each other.
  • the crushing process can be controlled while maintaining the essential process parameters for post-profiling crushing. And it ensures that an optimal Crushieren takes place, taking into account essential procedural parameters when Crushing.
  • the peripheral surface corresponding to the defined depth of the groove is in particular infinitely varied with respect to its depth in the groove with a constant ratio of the peripheral speeds of the grinding wheel and the crushing roller.
  • a limit speed is now preferably set the limit speed or the Crushierrolle so long driven until the speed of the peripheral speed of the grinding wheel in the defined depth of the groove of the peripheral surface corresponds.
  • the at least machine parameter and crushing parameter-dependent maximum relative feed between the grinding wheel and the crushing roller during crushing is determined in particular by way of "trial and error" before the actual crushing and entered as limit value into a machine control and in particular also stored there.
  • a grinding machine provided for grinding grooved workpieces conventionally includes a cross slide on a machine stand in X-axis direction and Z-axes Direction CNC-movable grinding headstock, which carries a profiled for grinding the groove grinding wheel, which is rotationally driven.
  • the grooves can also be straight grooves or recesses.
  • the grinding machine on a workpiece headstock with a C-axis. The workpiece is held on the grinding machine in one clamping.
  • the grinding machine has a Crushing device permanently installed thereon with a crusher roller with its own rotary drive. The speed of the Crushierrolle is controllable by means of a control device.
  • the crushing roller has a profiling crushing section for profiling crushing the grinding wheel with a first dressing volume and a post-profiling crushing section disposed on the same crushing roller for post profiling crushing of the grinding wheel with a second dressing volume.
  • the Crushierrolle more than two Crushierrillen or -nuten, which can be used successively in Crushieren the profiling of the grinding wheel until the last Crushierrille does not restore the required accuracy and sharpness of the profiling of the grinding wheel after Crush Schl during Crushing. Then the Crushierrolle would be replaced.
  • the next groove can be used for post-profiling crushing. This ensures that during the post-profiling crushing always a grinding wheel profile can be produced with optimum accuracy. This refers to post profiling crushing.
  • the profiling-crushing is applied before grinding in such a case, when the grinding wheel has not profiled according to the groove to be produced formed on the workpiece.
  • the profiling-Crushing is namely a so-called Warprofile.
  • Only after-cycle crimping has to be carried out occasionally after specified cycles so that both the shape of the profiling and the sharpness of the grinding wheel are restored after a certain grinding time has been carried out.
  • the crusher device is preferably arranged in a stable housing and fixedly connected to the machine stand. This makes it possible to reliably absorb the forces occurring during crushing and to avoid even an elastic deformation of the Crushing during Crushierens as far as possible.
  • the Crushier founded has a CNC-controlled drive, which is connected via a coupling with the Crushierrolle to the rotary drive.
  • the Crushierrolle from high-speed steel (HSS) or carbide.
  • the electric drive has the advantage that it can be reliably unlocked in particular in the case of profiling Crushierens, ie travels idle, which is particularly the case for profiling-Crushing the case because there usually the Crushierrolle is not driven, ie at Engaging the grinding wheel in the groove or groove of the Crushierrolle with the grinding wheel.
  • the electric drive of the Crushierrolle has also the advantage that in the case of lowering the speed of the Crushierrolle the drive can be switched by switching pulses on the connection of the drive torque briefly until the rotational speed of the Crushierrolle again that of the grinding wheel corresponds and then the Crushierrolle again runs without drive with the grinding wheel.
  • the Crushing device additionally comprises a structure-borne sound sensor, by means of which the engagement contact between the Crushierrolle and the grinding wheel can be monitored, wherein by means of the structure-borne sound sensor, a signal detecting the engagement contact is available to the control device, so that the control device, a signal via the engagement contact can be fed.
  • a structure-borne sound sensor by means of which the engagement contact between the Crushierrolle and the grinding wheel can be monitored, wherein by means of the structure-borne sound sensor, a signal detecting the engagement contact is available to the control device, so that the control device, a signal via the engagement contact can be fed.
  • the grinding wheel or the grinding spindle with the headstock is designed such that it can be moved to the crumbling roller during post-profiling crushing and can be moved in the transverse direction to the post-profiling crushing section.
  • Crushing namely a flank of the profile of the grinding wheel is usually approached first and something crushed, followed by the start and slight crushing of the second flank and then followed by the center in the groove running Nachprofilier-Crushieren.
  • the Crushierrolle is formed in one piece or two parts. While the one-piece construction with the provision of multiple crushing grooves for multiple crushing a grinding wheel during an entire grinding process for high rigidity, which is required for the Crush Schl brings benefits, the bipartite Crushierrolle is particularly advantageous if only a part of the Crushierrolle because of their Wear must be replaced, the not yet worn part, however, can be used. This may provide an advantage in terms of flexibility.
  • control device is preferably designed in such a way that a maximum relative feed between the grinding wheel and the crushing roller can be realized during crushing in such a way that this maximum relative feed is smaller than a predeterminable, machine and process parameter-dependent limit value, which is before Crushing in the controller can be entered.
  • This maximum relative feed is to be determined separately for each workpiece, for each execution of crushing rollers and grinding wheel and corresponding grinding conditions, including the abrasive pads used and the material of the crushing roller preferably in the context of "trial and error" experiments.
  • the skilled person is at least given the doctrine essential process parameters for the control of this maximum relative feed, ie the maximum allowable feed without unmanageable process conditions adverse type occur with the grinding machine respected or realized can.
  • the competent expert can determine this limit by testing. Once this limit has been determined, it is possible, by means of the control device, to approach the limit as close as possible to this limit, without this limit being exceeded. Thus, a fast and cost-effective crushing of grinding wheels with high accuracy in the fully automatic process is feasible.
  • FIG. 1 is shown in a schematic representation in plan view, the arrangement of the essential components of a grinding machine on the machine bed.
  • a workpiece headstock with a workpiece spindle with a C-axis has a workpiece 1 clamped.
  • a displaceable tailstock 4 is provided with a tip in extension of the longitudinal axis of the workpiece spindle.
  • On a mounted on the machine bed cross slide a wheel spindle with grinding spindle is arranged, on which a grinding wheel 5 is fixed.
  • the grinding wheel 5 has a profiling, with which the corresponding grooves are ground into the workpiece 1.
  • the grinding wheel can be moved in the X, Z, and Y directions via CNC axes and fed to the workpiece 1. Furthermore, a crimping device 7 is provided, which carries a crushing roller. The axes of rotation of the Crushierrolle and the grinding wheel 5 are arranged parallel to each other, at least if the grinding wheel 5 is crushed with respect to their profiling.
  • FIG. 2 are in the form of a section of the basic arrangement on the grinding machine according to FIG. 1 only the grinding spindle 2 with the grinding wheel 5 and associated therewith the crusher 7 with its crushing roller 8 shown.
  • the grinding spindle 2, with its grinding wheel 5 can be pivoted about a CNC-controlled A-pivot axis.
  • the grinding spindle is also CNC-controlled in the Z and Y directions.
  • FIG. 2 shown basic construction of the crimping device 7 is characterized by a high rigidity, which z. B. it is clear that the Crushing device 7 is arranged in a housing 9 in which the Crushierrolle 8 carrying Crushierspindel 16 is rigidly mounted on both sides of the Crushierrolle 8 by means of rolling bearings 12.
  • the drive motor 11 of the crusher 7 is also CNC-controlled and is connected via a coupling 10 with the Crushierspindel 16.
  • a Crushierrolle 8 Shown is in FIG. 2 a Crushierrolle 8 according to the invention, which has two Crushierrillen or Crushiernuten or Crushiernuten. Both Crushiernuten can be used sequentially to Crushieren the profiling of the grinding wheel 5. On the one hand, this can be a profiling-crushing with the first crushing groove and a post-profiling-crushing with the second crushing groove. On the other hand, it is also possible that the two Crushiernuten the Crushierrolle 8 are used only for Nachprofilier-Crushieren. In this case, the in FIG. 2 Crushing groove shown above first used for Nachprofilier-Crushieren until it can no longer produce the required accuracy of the profiling on the grinding wheel 5.
  • the crushing groove underlying in the drawing is applied to a further post-profiling crushing of the grinding wheel.
  • the service life of the crushing roller when crushed can be doubled with respect to a crushing roller having only a single crushing groove.
  • the higher stiffness so far into account and higher process accuracy in the crushing of the profiling of the grinding wheel and thus a higher accuracy of the workpieces to be ground can be achieved if the at least two Crushiernuten are arranged on a one-piece and thus rigid Crushierrolle 8.
  • FIG. 3 of the squeezer 7 only the main part thereof, the crushing roller 8, which is arranged on the crushing spindle 16, is shown.
  • the crushing roller 8 has a profiling crushing section 14 and a post-profiling crushing section 15.
  • a structure-borne noise sensor 13 is provided on the Crushing device 7, by means of which the engagement contact of the grinding wheel 5, which is arranged on the grinding spindle 2 and driven in rotation about its C-axis, with the Crushierrolle 8 can be detected or monitored.
  • grinding wheel 5 is not yet profiled and therefore must first be profiled-crushed for the actual grinding process.
  • profiling-Crushieren in the context of generating the actual profiling on the grinding wheel 5 is to be understood. This is carried out in a profiling crushing groove 14 provided on the crushing roll 8 for profiling-crushing.
  • the first before the profiling Crushing with her in cross-section deviating from the profile shape designed grinding wheel is first employed on a flank of the profiling Crushierabiteses 14 Crushiernut and crushed to a small extent.
  • a slight crushing is then performed on the second flank of the profiling crush groove 14.
  • the grinding wheel is moved into the middle of the groove of the Crushierrolle, and both flanks are then profiled-crushed at the same time. After the profiling crushing, the grinding wheel is post-profiled-crushed, whereby the grinding wheel receives its final profiling shape with very high accuracy.
  • the structure-borne sound sensor 13 responds at each contact of the profile 6 to be produced of the grinding wheel 5 on one of the flanks of the Crushiernuten 14, 15 and thus monitors the engagement contact during Crushieren.
  • the first just trained grinding wheel 5 is thus by the FIG. 3 shown profiling crushing groove 14 crushed into a sharp profile, which is provided for thread grinding.
  • the Nachprofilier-Crushiernut 15 provided for Nachprofilier-Crushieren 15th ensures the production of a profiling 6 on the grinding wheel 5 for a high-precision production of the grooves in the workpieces.
  • the crushing roller 8 Since the grinding wheel 5 has a concentricity error in the usual way, the crushing roller 8 is not fully driven when first touched by the grinding wheel 5. As a result, the speed of the crushing roller 8 can drop.
  • the drive motor 11 of the Cruhierspindel 16 can be added pulse-like. This connection takes place until the Crushierrolle 8 again has the speed which the grinding wheel 5 has. Ie. the drive pulse is carried out until the Crushierrolle 8 has their speed of the grinding wheel 5 corresponding target speed.
  • FIGS. 5a ), b) and c) the different phases when crushing the profiling 6 of the grinding wheel 5 are shown.
  • this procedure is implemented during the crushing, namely during profiling-crushing as well as after-profiling-crushing.
  • FIGS. 5a) to 5c ) exemplify the post-profiling crushing process.
  • FIG. 5a is shown how first a first edge of the profiling 6 of the grinding wheel 5 is approached on a first flank of the Nachprofilier-Crushiernut 15 in the Crushierrolle 8 and slightly crushed.
  • the grinding wheel 5 can be moved along its CNC-controlled Z and Y axes.
  • FIG. 5b It is shown how the laterally moved grinding wheel 5 is set with its edge of the profiling 6 opposite the first flank to the second flank formed on the post-profiling crushing groove 15 and subjected there to the starting operation and low crushing becomes. Analogous to FIG. 5a ) for the start of the first flank, the grinding wheel 5 is moved to approach in their CNC-controlled Z and Y axes in order to comply with the required and permissible Crushierparameter.
  • FIG. 6 For example, the geometric relationships between the crushing groove 15 of the crushing roller 8 and the profiling 6 of the grinding wheel 5 are shown with respect to two different levels with respect to the depth of the crushing groove 15.
  • the term “plane” is to be understood as the annular peripheral surface 17. She is only mentally referring to FIG. 6 in which this "plane" is represented for a single radius, referred to as "plane".

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Crushing And Grinding (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Claims (13)

  1. Procédé pour rectifier des pièces (1) présentant des rainures, avec un profilage (6) d'une meule (5) réalisé de façon correspondante à la section transversale de la rainure, au moyen de laquelle on rectifie la rainure dans la pièce (1) lors du serrage de celle-ci, dans lequel on dresse finement le profilage (6) de la meule (5), dans lequel on exécute un dressage fin de reprofilage de la meule (5) au moyen d'un rouleau de dressage fin (8) ainsi entraîné, dans lequel on exécute sa commande sur la base respectivement d'une mesure de la vitesse de rotation et de la consommation de courant des entraînements respectifs de la meule (5) et du rouleau de dressage fin (8), et on commande une avance relative entre la meule (5) et le rouleau de dressage fin (8) lors du dressage fin sur la base de cette mesure, caractérisé en ce que lors du dressage fin de reprofilage avec une partie de dressage fin de profilage du rouleau de dressage fin on enlève de la meule un plus grand volume de dressage que lors du dressage fin de reprofilage avec une partie de dressage fin de reprofilage disposée sur le même rouleau de dressage fin.
  2. Procédé selon la revendication 1, caractérisé en ce que l'on effectue un dressage fin de profilage de la meule (5) au moyen du rouleau de dressage fin (8) en l'occurrence entraîné dans tous les cas uniquement de façon temporaire par la commande de l'entraînement de la meule sur la base de sa vitesse de rotation et de sa consommation de courant mesurées et par la commande de l'avance relative entre la meule (5) et le rouleau de dressage fin (8) sur la base de cette mesure, dans lequel on exécute le dressage fin de profilage avant le début du processus de rectification.
  3. Procédé selon une revendication 1 ou 2, caractérisé en ce que l'on approche la meule (5) du rouleau de dressage fin (8) pour le dressage fin et on la met en engagement avec celui-ci, dans lequel pendant le dressage fin de profilage le rouleau de dressage fin (8) tourne librement avec la meule (5) sans entraînement propre actif (11).
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on fournit un agent de refroidissement au rouleau de dressage fin (8) et à la meule (5) leur région d'engagement lors du dressage fin.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'une avance relative maximale entre la meule (5) et le rouleau de dressage fin (8) dépend des paramètres de la machine et des paramètres du dressage fin lors du dressage fin et on la détermine avant le dressage fin et on l'introduit, en particulier on l'y mémorise, dans une commande de la machine en tant que valeur limite.
  6. Machine à rectifier pour rectifier des pièces (1) présentant des rainures, qui présente une poupée porte-meule (2) déplaçable par CNC en direction de l'axe X et en direction de l'axe Z sur un chariot croisé sur un bâti de machine, laquelle porte une meule (5) profilée pour la rectification de la rainure et qui l'entraîne en rotation, et une poupée porte-pièce (3) avec un axe C, dans laquelle la pièce (1) se trouve dans une monture et il est en outre prévu un dispositif de dressage fin (7) installé fixement dans la machine à rectifier avec un rouleau de dressage fin (8) avec son propre entraînement en rotation (11), qui peut être commandé au moyen d'un dispositif de commande, dans laquelle la meule (5) et le rouleau de dressage fin (8) peuvent être entraînés et régulés en vitesse de rotation pendant le dressage fin de reprofilage,
    caractérisée en ce la meule (5) peut être approchée du rouleau de dressage fin (8) pour le dressage de son profilage (6) et le rouleau de dressage fin (8) présente une partie de dressage fin de profilage (14) pour le dressage fin de profilage de la meule (5) avec un premier volume de dressage et une partie de dressage fin de reprofilage (15) disposée sur le même rouleau de dressage fin (8) pour le dressage fin de reprofilage de la meule (5) avec un second volume de dressage.
  7. Machine à rectifier selon la revendication 6, caractérisée en ce que le dispositif de dressage fin (7) est disposé dans un boîtier (9) et est assemblé de façon fixe au bâti de la machine.
  8. Machine à rectifier selon une revendication 6 ou 7, caractérisée en ce que le dispositif de dressage fin (7) présente un entraînement à commande CNC (11), qui est relié par un accouplement (10) au rouleau de dressage fin (8) constitué en particulier d'acier à coupe très rapide ou de métal dur, pour son entraînement en rotation.
  9. Machine à rectifier selon l'une quelconque des revendications 6 à 8, caractérisé en ce que le dispositif de dressage fin (7) présente un capteur de bruit de structure (13), au moyen duquel, lorsque la meule (5) se trouve en engagement avec le rouleau de dressage fin (8), un signal peut être fourni au dispositif de commande, sur la base duquel le contact d'engagement entre le rouleau de dressage fin (8) et la meule (5) peut être déterminé en vue de sa surveillance.
  10. Machine à rectifier selon l'une quelconque des revendications 6 à 9, caractérisée en ce que la meule (5) peut être approchée du rouleau de dressage fin (8) lors du dressage fin de reprofilage et est déplaçable en direction transversale par rapport à la partie de dressage fin de reprofilage (15).
  11. Machine à rectifier selon l'une quelconque des revendications 6 à 10, caractérisée en ce que des impulsions de travail commutables peuvent être envoyées à l'entraînement (11) du dispositif de dressage fin (7) lors d'une baisse de sa vitesse de rotation au début et/ou au cours du dressage fin de profilage.
  12. Machine à rectifier selon l'une quelconque des revendications 6 à 11, caractérisée en ce que le rouleau de dressage fin (8) est réalisé en une partie ou en deux parties.
  13. Machine à rectifier selon l'une quelconque des revendications 6 à 12, caractérisée en ce que le dispositif de commande est configuré de telle manière qu'une avance relative maximale entre la meule (5) et le rouleau de dressage fin (8) lors du dressage fin soit plus petite qu'une valeur limite prescriptible et dépendant des paramètres de la machine et des paramètres du processus, qui peut être entrée dans le dispositif de commande avant le dressage fin.
EP16709434.1A 2015-03-18 2016-03-11 Procédé et machine à rectifier pour rectifier pièces avec rainures Active EP3271111B1 (fr)

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DE102015204909.4A DE102015204909B4 (de) 2015-03-18 2015-03-18 Verfahren und Schleifmaschine zum Schleifen von Nuten aufweisenden Werkstücken
PCT/EP2016/055221 WO2016146495A1 (fr) 2015-03-18 2016-03-11 Procédé servant à rectifier des pièces à usiner comportant des rainures et rectifieuse

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JP (1) JP6679612B2 (fr)
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CN109590893B (zh) * 2019-01-04 2021-01-26 京东方科技集团股份有限公司 利用研磨系统的研磨方法、研磨系统
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CN110712095B (zh) * 2019-11-11 2024-11-29 淮阴工学院 一种利用仿形砂轮机加工三通管焊接相贯线的设备
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CN107427983B (zh) 2020-09-29
KR20170129825A (ko) 2017-11-27
WO2016146495A1 (fr) 2016-09-22
ES2757752T3 (es) 2020-04-30
DE102015204909A1 (de) 2016-09-22
CN107427983A (zh) 2017-12-01
JP2018511488A (ja) 2018-04-26
BR112017019867A2 (pt) 2018-05-29
KR102542334B1 (ko) 2023-06-14
US20180043503A1 (en) 2018-02-15
DE102015204909B4 (de) 2021-12-30
BR112017019867B1 (pt) 2020-12-08
US10532443B2 (en) 2020-01-14
JP6679612B2 (ja) 2020-04-15
EP3271111A1 (fr) 2018-01-24

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