EP3852972A1 - Procédé de dressage d'un outil de rodage, dispositif d'utilisation du procédé ainsi que machine d'usinage dotée du dispositif, baguette de rodage et outil de rodage - Google Patents
Procédé de dressage d'un outil de rodage, dispositif d'utilisation du procédé ainsi que machine d'usinage dotée du dispositif, baguette de rodage et outil de rodageInfo
- Publication number
- EP3852972A1 EP3852972A1 EP19782910.4A EP19782910A EP3852972A1 EP 3852972 A1 EP3852972 A1 EP 3852972A1 EP 19782910 A EP19782910 A EP 19782910A EP 3852972 A1 EP3852972 A1 EP 3852972A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- honing
- tool
- dressing
- dressing device
- honing tool
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000003754 machining Methods 0.000 title abstract description 3
- 239000004575 stone Substances 0.000 claims description 32
- 238000012545 processing Methods 0.000 claims description 23
- 238000009760 electrical discharge machining Methods 0.000 claims description 8
- 230000003628 erosive effect Effects 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 description 12
- 238000005520 cutting process Methods 0.000 description 6
- 229910003460 diamond Inorganic materials 0.000 description 6
- 239000010432 diamond Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010002 mechanical finishing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012876 topography 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
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
- B24B53/001—Devices or means for dressing or conditioning abrasive surfaces involving the use of electric current
Definitions
- the invention relates to a method for dressing a honing tool comprising honing stones. Furthermore, the invention relates to a device for applying the method and a honing machine or universal processing machine equipped with the device, a honing tool and a honing stone.
- Honing tools are used for the mechanical finishing of metallic and / or other machinable surfaces, in particular the inner surfaces of cylinders of internal combustion engines. Honing tools can also be used, for example, to machine compressors, pneumatic and hydraulic components or injection pump parts. The real one
- the surfaces are machined using honing stones arranged on a cylindrical tool body, which usually include cutting grains embedded in a binding material, for example made of diamond or cubic crystalline boron nitride (CBN), through which the actual material removal on the workpiece is achieved.
- the basic tool body rotates about its longitudinal axis (z-axis) and is also moved translationally along its longitudinal axis. Radial infeed to the bore wall takes place mechanically or hydraulically.
- the object of the present invention is to provide a method and a device which eliminate the disadvantages of the prior art mentioned.
- a method according to the invention for dressing a honing tool comprising honing stones is characterized in that at least one honing stone is dressed by means of an electroerosive method, in particular by means of die sinking EDM.
- the erosion process enables harder cutting materials with a longer service life to be used for the honing stones.
- a medium suitable for both honing and eroding is used as the dielectric makes it possible to deliver the honing tool ready for use immediately after the dressing process or to transfer the process directly into a processing machine (e.g. honing machine or machining center), for example by means of a handling system integrate.
- the at least one honing stone is mounted on the main tool body during dressing. In this way, a constant, defined degree of resetting is achieved for all strips of the honing tool, since all honing strips are dressed in the same process - in contrast to the dog process known from the prior art.
- Defined positioning of the tool electrode in the radial direction thus enables the production of a precise and reproducible macro shape without it being necessary to grind the honing stones beforehand to the desired shape.
- the process-related working gap between the electrodes ensures that the cutting grains are not mechanically stressed during the spark erosion process.
- the lowering process can be carried out by a continuous feed in the radial direction. This infeed can be superimposed on a rotational movement about the z-axis, that is, about the approved rotational axis of the honing tool.
- the honing stones can be mechanically expanded beyond the defined outside diameter of the workpieces to be honed, in particular beyond the bore of a cylinder in an engine block. During the eroding process, the finished diameter of the hole to be honed is then eroded.
- three relative movements between the tool electrode and the honing tool can be carried out during the dressing process, namely a lifting movement, a rotation and an infeed movement.
- the honing tool or the tool electrode can rest against the fixed world during dressing. A simultaneous movement of both components in relation to the fixed world is also conceivable.
- a conical, a double-bell shape (front and top) and a barrel-shaped shape of the honing tool can be achieved. Otherwise, a cylindrical shape of the honing tool can be assumed.
- the tool electrode used is adapted at least in sections to the geometry of the geometry to be created with the honing tool, the desired geometry of the honing tool can be produced in a particularly advantageous manner.
- a graphite or copper electrode is used as the tool electrode. Due to its extraordinary wear resistance, graphite is suitable for high discharge energies and thus promises long tool life. Copper guarantees four times higher thermal conductivity than graphite and one by three
- the honing tool is an internally cooled honing tool, chip entry and an additional cleaning can be effectively prevented the honing tool after dressing can be omitted.
- the tool electrode used is adapted at least in sections to the geometry of the geometry to be created with the honing tool.
- the dressing device according to the invention can contain, as a dielectric, a medium which is suitable both for honing and for eroding; the tool electrode of the dressing device can in particular be a graphite or copper electrode.
- a processing machine in particular a honing machine, is equipped such that it comprises a dressing device as described above.
- the processing machine can also carry out other processing methods in addition to honing;
- the implementation of the invention on a pure honing machine is also conceivable.
- the processing machine can include a tool spindle which is set up to bring a honing tool into the dressing device for dressing.
- the tool spindle can be suitable for rotating the honing tool in the dressing device in a rotary and / or translatory manner, so that the dressing process can be carried out particularly easily without further reclamping being necessary.
- a particularly compact and space-saving solution results from the fact that the dressing device is integrated in a tool magazine of the processing machine. Exemplary embodiments and variants of the invention are explained in more detail below with reference to the drawing. Show it
- Figure 1 schematically shows the principle of resetting the tool surface or the binding material of a honing stone by means of spark erosion
- Figure 2 also schematically shows a dressing device for spark erosion
- Figure 1 shows schematically the principle of resetting an honing stone surface or the binding material of an honing stone 1 by means of spark erosion.
- a tool electrode 2 of an eroding machine not shown separately in the figure, by means of which a workpiece electrode designed as a honing stone 1 is processed.
- an electrical voltage is applied between the tool electrode 2 and the workpiece electrode 1 by means of a generator 3. If the voltage is sufficiently high, an electrical discharge 4 occurs in the dielectric 5 located between the two electrodes 1 and 2, which leads to the removal of particles 6 from the bonding material of the honing stone 1.
- the parameters voltage, processing time, duty cycle and electrode material can be set in a reproducible manner.
- FIG. 2 schematically shows a dressing device 8 for the spark-erosive lowering of a honing tool 9 located therein.
- a honing tool 9 with a cylindrical base body 10, on the lateral surface of which honing stones 1 are arranged parallel to the axial direction.
- the honing tool 9 rotates about its longitudinal axis during processing, as indicated by the arrow 11.
- the tool electrode 2 is adapted to the geometry of the geometry to be created with the honing tool 9.
- the tool electrode 2 has a cylindrical recess in the area which acts on the honing tool 9, the diameter of which can correspond, for example, to the bore of a cylinder to be machined by the honing tool 9 in an engine block, that is to say, for example, approximately 80 mm .
- the tool electrode 2 is advanced in the radial direction in such a way that the desired rotationally symmetrical geometry of the honing tool 9 is achieved.
- the honing stones 1 can have a rectangular cross section. Both the desired surface quality and the desired surface geometry can be produced by the method according to the invention in a single, largely automated and thus reproducible operation.
- FIG. 3 shows in the partial figures 3a-3e various alternative dressing concepts and designs of tool electrodes 2, which are briefly described below.
- FIG. 3a shows a simple, full-surface unrolling of a honing tool 9 on a convex tool electrode 2, both tools 2,9 rotating about their longitudinal axis.
- Figure 3b shows a roll with a superimposed lifting movement, similar to a honing movement.
- FIG. 3c shows a toroidal tool electrode 2 which rotates about its longitudinal axis, the honing tool 9 executing a rotation and lifting movement.
- FIG. 3d shows a roll on a full ring tool electrode 2.
- Figure 3e shows a honing-like movement on a tool electrode 2 with an inner radius.
- FIG. 4a shows a likewise schematic representation of a processing machine 12 with a dressing device 8 according to the invention.
- the processing machine 12 comprises two tool spindles 13 with honing tools 9 arranged therein for machining a workpiece 14, in the example shown an engine block with cylinder bores 15, that of the
- Processing machine 12 are processed.
- the tool spindles 13 can be moved independently of one another, for example for a tool change or for starting a bore.
- the processing machine shown in the figure comprises a tool magazine 16 with receptacles 17 for honing tools 9 which are not currently required.
- the tool magazine further comprises a dressing device 8, for example in the manner shown in FIGS. 2 or 3.
- This variant enables the tool to be used without requiring additional space to create an effective solution for dressing or preparing honing tools in a single machine tool.
- a variant of particular interest as a retrofit solution is shown schematically in FIG. 4b.
- a machine tool 12 ' is shown in accordance with FIG. 4a, the machine tool 12', however, in this case being equipped with a conventional tool magazine 16 '.
- the dressing device 8 is designed as a stand-alone module.
- the handling of the tools 9 to be dressed from the tool spindles 13 'or the tool magazine 16' of the processing machine 12 'into the dressing device 8 and back takes place with the aid of the robot 18, which is also shown in the figure.
- the solutions shown can be easily integrated into linked production lines or rotary transfer systems. It is of course also conceivable to dress honing tools in contractors in the manner shown here.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding-Machine Dressing And Accessory Apparatuses (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018122682.9A DE102018122682A1 (de) | 2018-09-17 | 2018-09-17 | Verfahren zum Abrichten eines Honwerkzeuges, Vorrichtung zur Anwendung des Verfahrens sowie mit der Vorrichtung ausgestattete Bearbeitungsmaschine, Honleiste und Honwerkzeug |
DE202018105343.4U DE202018105343U1 (de) | 2018-09-18 | 2018-09-18 | Vorrichtung zum Abrichten eines Honwerkzeuges sowie mit der Vorrichtung ausgestattete Bearbeitungsmaschine, Honleiste und Honwerkzeug |
PCT/EP2019/074765 WO2020058216A1 (fr) | 2018-09-17 | 2019-09-17 | Procédé de dressage d'un outil de rodage, dispositif d'utilisation du procédé ainsi que machine d'usinage dotée du dispositif, baguette de rodage et outil de rodage |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3852972A1 true EP3852972A1 (fr) | 2021-07-28 |
Family
ID=68138011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19782910.4A Pending EP3852972A1 (fr) | 2018-09-17 | 2019-09-17 | Procédé de dressage d'un outil de rodage, dispositif d'utilisation du procédé ainsi que machine d'usinage dotée du dispositif, baguette de rodage et outil de rodage |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3852972A1 (fr) |
WO (1) | WO2020058216A1 (fr) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0151914A1 (fr) * | 1984-01-02 | 1985-08-21 | Miba Sintermetall Aktiengesellschaft | Dispositif pour le taillage d'une meule à liant métallique |
DE4132879C2 (de) | 1991-10-03 | 1994-06-23 | Oel Held Gmbh | Dielektrische Flüssigkeit für die Metallbearbeitung durch Funkenerosion |
EP0909611B1 (fr) * | 1997-10-14 | 2002-01-30 | Agathon A.G. Maschinenfabrik | Procédé pour meuler les surfaces de pièces et dispositif pour la mise en oeuvre du procédé |
JP4868577B2 (ja) * | 2006-03-28 | 2012-02-01 | 独立行政法人理化学研究所 | Elidホーニング装置及び方法 |
-
2019
- 2019-09-17 WO PCT/EP2019/074765 patent/WO2020058216A1/fr unknown
- 2019-09-17 EP EP19782910.4A patent/EP3852972A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2020058216A1 (fr) | 2020-03-26 |
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