EP0103062B1 - Verfahren und Vorrichtung zum Schärfen einer Schleifscheibe - Google Patents

Verfahren und Vorrichtung zum Schärfen einer Schleifscheibe Download PDF

Info

Publication number
EP0103062B1
EP0103062B1 EP83102938A EP83102938A EP0103062B1 EP 0103062 B1 EP0103062 B1 EP 0103062B1 EP 83102938 A EP83102938 A EP 83102938A EP 83102938 A EP83102938 A EP 83102938A EP 0103062 B1 EP0103062 B1 EP 0103062B1
Authority
EP
European Patent Office
Prior art keywords
sharpening
force
feed
grinding wheel
grinding
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.)
Expired
Application number
EP83102938A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0103062A2 (de
EP0103062A3 (en
Inventor
Heinrich Dipl.-Ing Schleich
Kemal Dipl.-Ing Yegenoglu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Diamantwerkzeuge GmbH and Co KG
Original Assignee
Ernst Winter and Sohn Diamantwekzeuge GmbH and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ernst Winter and Sohn Diamantwekzeuge GmbH and Co filed Critical Ernst Winter and Sohn Diamantwekzeuge GmbH and Co
Publication of EP0103062A2 publication Critical patent/EP0103062A2/de
Publication of EP0103062A3 publication Critical patent/EP0103062A3/de
Application granted granted Critical
Publication of EP0103062B1 publication Critical patent/EP0103062B1/de
Expired legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a method for sharpening and cleaning grinding wheels with diamond or cubic-crystalline boron nitride as an abrasive by means of a sharpening block whose feed force is preset and an apparatus for carrying out the method, starting from the state of the art in US-A-4182 082.
  • Abrasive discs with diamond or cubic crystalline boron nitride as the abrasive have established themselves due to their high wear resistance and other technological and economic advantages for the machining of many, especially very hard ferrous and non-ferrous materials.
  • These grinding wheels must therefore be re-profiled in certain cycles.
  • profiling processes are available today for profiling diamond and boron nitride grinding wheels.
  • the choice of the profiling process depends on the grain material such as diamond or boron nitride, the bonding material and the profile shape of the grinding wheel.
  • profiling processes in particular those that work with a diamond roller, diamond bar or a diamond block or with other diamond-tipped profiling tools, but also those that work with rotating silicon carbide or corundum grinding wheels as a profiling tool, leave a grinding wheel surface after profiling that is suitable for grinding, in particular with high removal rates, is too smooth.
  • the grain protrusion above the bond is too small, so that there is not enough space between the grains for the removal of chips and the supply of cooling lubricant.
  • the grinding wheel must therefore also be sharpened in many cases after dressing.
  • This process which is also called tearing, roughening, pulling or opening, causes the bond to set back against the abrasive grain tips, with no or only an insignificant number of the diamond or boron nitride grains breaking out in order not to change the contour of the grinding wheel.
  • sharpening with a sharpening block made of corundum and / or silicon carbide in a ceramic or bakelitic bond has established itself due to its process-specific advantages.
  • the sharpening block is fed to the grinding wheel in one pass (like deep grinding) or by immersion (like plunge grinding).
  • the invention has for its object to provide a method for sharpening with sharpening block that reproducibly generates a given chip space between the diamond or boron nitride grains of the grinding wheel with the least possible effort on sharpening block material and without sharpening the grinding wheel during sharpening high forces between the sharpening block and grinding wheel are damaged or mechanically or thermally influenced in an inadmissible manner in order to create a technological and economic improvement over known sharpening methods.
  • a sharpening device is to be created which enables the required sharpening process on production grinding machines.
  • the object is achieved in the aforementioned method in that the feed speed is reduced when the preset maximum feed force is reached so that the set maximum feed force is not exceeded and that the feed speed is kept constant at a preset setpoint by control as soon as the feed force is below the preset maximum feed force.
  • Sharpening with a sharpening block with constant feed force has the advantage that the grinding wheel structure cannot be overloaded due to excessive initial forces, since the feed speed adapts to the set feed force at all times.
  • the setting of the force can e.g. B. done by pneumatics, hydraulics or weights.
  • the roughness of the grinding wheel can be adapted to the grinding task, with higher feed forces leading to a higher roughness of the grinding wheel, which is required for grinding with high stock removal rates.
  • the sharpening block lies against the grinding surface for a very long time without being abrasive. For a short and reproducible process of the sharpening process therefore to profile the grinding wheel so that the abrasion of the sharpening block is guaranteed by sufficient roughness of the grinding surface.
  • the set feed force only affects the feed speed via the regulating grinding wheel width, machinability of the bond, cooling lubrication conditions etc., which determines the size of the chip space generated. Correlations between the feed force and the resulting chip space therefore only apply in individual cases and are not transferable and therefore difficult to systematize and very prone to failure. This applies in particular when using grinding wheels with different profiles.
  • in principle incompatible with regard to optimal process design are the relationships that a short sharpening time requires a high sharpening force at the start of the process, but a high sharpening force can subsequently lead to an impermissibly high feed rate.
  • sharpening at a constant feed rate ensures that the chip space corresponding to the feed rate is established in the grinding wheel.
  • inadmissibly high forces can occur between the sharpening block and the grinding wheel in the initial phase of the sharpening process. This creates a risk of overloading, in particular if the grinding wheel has a very smooth profile.
  • the sharpening method according to the invention even with grinding wheels that are difficult to sharpen, results on the one hand from a constant feed speed in the final phase of the sharpening process and, on the other hand, through an adjustable feed force at the start of the sharpening process, to particularly good sharpening results with very short sharpening times, without the grinding wheel being damaged or is influenced inadmissibly.
  • the feed rate is initially limited to a previously adjustable force, the following must be taken into account. If chip spaces then opened between the grinding grains, the forces occurring would remain smaller at a constant feed speed because, on the one hand, the friction surface is smaller and, on the other hand, the chips can be better removed between the grinding wheel and the sharpening stone. If the force is now limited to a fixed or constant value, the feed rate increases continuously depending on the further formation or enlargement of the chip spaces between the grains. If the feed speed was slow, the chip spaces would not increase any further since the abrasion on the stone is just large enough that it can be removed through the chip spaces. If there are small gaps between the grains, the feed rate can increase without a certain force being exceeded. Then comes the time when the chip spaces are so large that the maximum feed speed is reached when the maximum force is present.
  • the feed rate should be set to a higher value.
  • the device for performing the method includes the features specified in claim 2.
  • the feed speed v solI is kept constant below an adjustable value F max of the feed force. Above this value, the feed speed becomes almost zero.
  • the characteristic entered in dashed lines in FIG. B. can be realized by simple damping elements, is disadvantageous in the sense of the invention, since it causes a speed change with increasing or decreasing force below the maximum permissible force value F max and the formation of the chip space of the grinding wheel, which is dependent on the feed speed, even at low, the feed force influencing process disturbances is reproducibly achieved.
  • the speed / force characteristic according to the invention leads to the course of feed force and speed over the sharpening time, which is shown in FIG. 2 and is to be regarded as optimal.
  • the feed force reaches its set maximum permissible value F max '
  • the feed speed v initially takes on very low values and then gradually increases according to the current state of sharpening of the grinding wheel and the resulting force / speed ratio. As soon as the feed force falls below the maximum value, the feed speed reaches its target value v s , 11 and in the following maintains this regardless of the further course of the feed force. A comparison of sharpening results showed that surprisingly reproducible results were achieved with this characteristic.
  • the maximum force is set in a first device and the feed rate in a second device.
  • the feed rate is set to 100 mm per minute and the force to 100 Newtons, it being assumed that the feed rate should be as much as 100 mm per minute.
  • the feed rate is limited to such an extent that only 100 Newtons occur.
  • the feed speed therefore does not need to be regulated from the outside, but adjusts itself automatically according to the value of the existing force.
  • the feed rate always tries to reach its maximum. This process is ended when the chip spaces are so large that they readily remove the material of the stone to be removed at the predetermined feed rate. This is expressed in a drop in the displayed force.
  • the maximum set feed rate is reached when the actual force drops below the maximum force.
  • the sharpening method according to the invention can be implemented in accordance with the form shown in FIG.
  • the grinding wheel 1 is to be sharpened by the sharpening block 2. This is pressed against the grinding wheel by a pneumatic piston 3.
  • the maximum permissible feed force depends on the piston area A 1 by the air pressure p l .
  • a hydraulic piston 4 is mechanically coupled to the pneumatic piston 3.
  • the hydraulic cylinder 6 forms a closed system with the flow regulator 5, in which the hydraulic oil flows from the piston side through the flow regulator to the other piston side during the feed movement.
  • the current controller regulates the oil flow and thus the feed rate independently of the differential pressure between the two surfaces of the hydraulic piston and thus independently of the reaction force between the grinding wheel and the sharpening block.
  • Such a device requires only a small amount of space and a very large range of values for the steep sizes, as a result of which an optimal adaptation to all practical applications is guaranteed.
  • the use of compressed air as an energy source is also advantageous since it is generally available in the installation area of machine tools and does not cause any connection problems.
  • the sharpening method according to the invention can also be implemented with hydraulic, mechanical, electromagnetic or magnetic drives, which are not explained in more detail here, and depending on the type of drive, force and speed regulating spring, damper or combined spring / damper systems or current regulators can also be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP83102938A 1982-09-10 1983-03-24 Verfahren und Vorrichtung zum Schärfen einer Schleifscheibe Expired EP0103062B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823233609 DE3233609A1 (de) 1982-09-10 1982-09-10 Verfahren und vorrichtung zum schaerfen einer schleifscheibe
DE3233609 1982-09-10

Publications (3)

Publication Number Publication Date
EP0103062A2 EP0103062A2 (de) 1984-03-21
EP0103062A3 EP0103062A3 (en) 1985-04-03
EP0103062B1 true EP0103062B1 (de) 1987-03-18

Family

ID=6172910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83102938A Expired EP0103062B1 (de) 1982-09-10 1983-03-24 Verfahren und Vorrichtung zum Schärfen einer Schleifscheibe

Country Status (4)

Country Link
US (1) US4566426A (enrdf_load_stackoverflow)
EP (1) EP0103062B1 (enrdf_load_stackoverflow)
JP (1) JPS5964275A (enrdf_load_stackoverflow)
DE (1) DE3233609A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3628143A1 (de) * 1986-08-19 1988-02-25 Winter & Sohn Ernst Verfahren und vorrichtung zum abrichten von schleifscheiben
JPH0621652Y2 (ja) * 1988-03-22 1994-06-08 セントラル硝子株式会社 研削砥石のドレッシング装置
US5058326A (en) * 1990-08-21 1991-10-22 The Grav-I-Flo Corporation Tilting system for centrifugal finishing machine
US5427564A (en) * 1993-08-02 1995-06-27 Robotics And Automation Corp. Controlled surface treating work device
US5447208A (en) * 1993-11-22 1995-09-05 Baker Hughes Incorporated Superhard cutting element having reduced surface roughness and method of modifying
US5547112A (en) * 1995-06-16 1996-08-20 Anchor Hocking Corporation Pouring edge structure for eliminating dribble
US10307891B2 (en) 2015-08-12 2019-06-04 Us Synthetic Corporation Attack inserts with differing surface finishes, assemblies, systems including same, and related methods
US10900291B2 (en) 2017-09-18 2021-01-26 Us Synthetic Corporation Polycrystalline diamond elements and systems and methods for fabricating the same
CN108481132A (zh) * 2018-04-16 2018-09-04 福州大学 一种恒压力磨削装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446105A (en) * 1944-11-20 1948-07-27 Sheffield Corp Crush-type grinding wheel truing device
US2443789A (en) * 1947-03-29 1948-06-22 Norton Co Grinding wheel truing apparatus
US3037330A (en) * 1959-04-15 1962-06-05 Fidelitone Inc Autoamtic grinding and polishing machine
DD120823A1 (enrdf_load_stackoverflow) * 1975-07-18 1976-07-05
DE2559659A1 (de) * 1975-08-05 1977-06-30 Winter & Sohn Ernst Verfahren zum abrichten und/oder profilieren von schleifscheiben
US4118900A (en) * 1976-03-29 1978-10-10 Seiko Seiki Kabushiki Kaisha Method for controlling grinding process
US4182082A (en) * 1978-01-19 1980-01-08 Ernst Winter & Sohn (Gmbh & Co.) Method for the profiling of grinding wheels and apparatus therefor
DD136008A1 (de) * 1978-03-01 1979-06-13 Horst Czaika Pneumohydraulischer vorschub fuer support
US4452223A (en) * 1982-09-03 1984-06-05 Litton Industrial Products, Inc. Cylindrical grinding machine truing and dressing device

Also Published As

Publication number Publication date
US4566426A (en) 1986-01-28
EP0103062A2 (de) 1984-03-21
JPS5964275A (ja) 1984-04-12
EP0103062A3 (en) 1985-04-03
DE3233609C2 (enrdf_load_stackoverflow) 1987-06-04
DE3233609A1 (de) 1984-03-15

Similar Documents

Publication Publication Date Title
EP0103062B1 (de) Verfahren und Vorrichtung zum Schärfen einer Schleifscheibe
WO2003080935A1 (de) Verfahren und vorrichtung zum optimieren eines schneideprozesses bei strassenfräsmaschinen
DE102015204909B4 (de) Verfahren und Schleifmaschine zum Schleifen von Nuten aufweisenden Werkstücken
EP1584396B1 (de) Verfahren und Maschine zur Herstellung einer Walze
DE2321477A1 (de) Verfahren und vorrichtung zum abrichten und schaerfen von schleifscheiben
DE3782656T2 (de) Verfahren und vorrichtung zum bearbeiten von harten, sproeden und schwer bearbeitbaren werkstuecken.
DE2925970A1 (de) Spitzenlose schleifmaschine und verfahren zum schleifen eines werkstuecks
EP1743738B1 (de) Regelung des Anpressdrucks in einer Werkzeugmaschine
DE2030851A1 (de) Schleifmaschine
DE4216329C1 (enrdf_load_stackoverflow)
DE19811316A1 (de) Lageregelung für eine Kombinationsfräsmaschine mit innen angeordneter Schleifscheibe
DE102008058638A1 (de) Verfahren zum Betreiben einer Doppelseitenschleifmaschine sowie Doppelseitenschleifmaschine
DE102014018541B4 (de) Verfahren zur Finishbearbeitung von Werkstückoberflächen
DE3875143T2 (de) Vorrichtung zum polieren.
EP0587043A2 (de) Verfahren und Schaltungsanordnung zur Steuerung und Regelung eines Druckstromerzeugers für mehrere parallel geschaltete unterschiedliche hydraulische Verbraucher
DE102005045143A1 (de) Verfahren und Vorrichtung zur spanenden Bearbeitung von Werkstücken
DD209406B1 (de) Verfahren fuer die schleiftechnische bearbeitung von werkstuecken mit komplizierten bearbeitungsbedingungen auf innenrundschleifmaschinen
DE3930457A1 (de) Verfahren zur materialabhebenden fein- oder feinstbearbeitung
DE3243693A1 (de) Dornhonwerkzeug
EP3323541A1 (de) Verbesserter logarithmischer fräskopf
DE3501935C1 (de) Verfahren zum Feinbearbeiten der Flanken von Zahnrädern mit einem zahnradartigen, mit Hartstoffkörnern beschichteten Werkzeug
DD142309A1 (de) Verfahren zum schonenden einsatz von schleifwerkzeugen,insbesondere diamantwerkzeugen
DE102005026546A1 (de) Verfahren zum Drahttrennläppen
DE102024201260A1 (de) Verfahren und Werkzeugmaschine zum Herstellen eines Abrichtwerkzeugs
DE3636770A1 (de) Verfahren und vorrichtung zum abrichten von schleifscheiben mit konstanter kraft

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830330

AK Designated contracting states

Designated state(s): CH FR GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): CH FR GB IT LI SE

17Q First examination report despatched

Effective date: 19860910

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH FR GB IT LI SE

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19880325

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19880331

Ref country code: CH

Effective date: 19880331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881122

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 83102938.4

Effective date: 19881206