EP0183031B1 - Procédé pour la fabrication d'alésages ayant une surface de haute qualité et dispositif pour la mise en oeuvre du procédé - Google Patents

Procédé pour la fabrication d'alésages ayant une surface de haute qualité et dispositif pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0183031B1
EP0183031B1 EP85113073A EP85113073A EP0183031B1 EP 0183031 B1 EP0183031 B1 EP 0183031B1 EP 85113073 A EP85113073 A EP 85113073A EP 85113073 A EP85113073 A EP 85113073A EP 0183031 B1 EP0183031 B1 EP 0183031B1
Authority
EP
European Patent Office
Prior art keywords
stroke
honing
contact pressure
reversal
honing stones
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 - Lifetime
Application number
EP85113073A
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German (de)
English (en)
Other versions
EP0183031A3 (en
EP0183031A2 (fr
Inventor
Albert Bender
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.)
Maschinenfabrik Gehring GmbH and Co KG
Original Assignee
Maschinenfabrik Gehring GmbH and Co KG
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 Maschinenfabrik Gehring GmbH and Co KG filed Critical Maschinenfabrik Gehring GmbH and Co KG
Publication of EP0183031A2 publication Critical patent/EP0183031A2/fr
Publication of EP0183031A3 publication Critical patent/EP0183031A3/de
Application granted granted Critical
Publication of EP0183031B1 publication Critical patent/EP0183031B1/fr
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Expired - Lifetime legal-status Critical Current

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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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/06—Honing machines or devices; Accessories therefor with controlling or gauging equipment

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a device for carrying out the method according to the preamble of claim 9.
  • a generic method is known from EP-A 0 081 383, in which towards the end of a machining stroke the contact pressure of the honing stones is kept at a low level and in the middle of a machining stroke at a high level. This ensures that the partial surface pressure of the abutting honing stone sections does not become greater when the honing stones are partially moved out at the ends of the holes than when the honing stones lie against the wall of the hole over their entire length. Dimensional and form errors of the bore are avoided because uniform machining is achieved.
  • the contact pressure of the honing stones is therefore always so great that essentially a cutting force acts on the honing stones, that is to say cutting work occurs. In particular, at the reversal point of the honing stones, these are at a certain contact pressure, so that even at the reversal point a cutting force on the honing stones occurs.
  • DE-A 30 39 467 discloses a device having the technical features of the preamble of claim 9 for eliminating dimensional or geometric errors in a bore. To correct the error, the system pressure of the honing stones is changed; in the case of dimensional and geometric errors at the ends of the holes, however, the overflow path of the honing stones is adjusted.
  • the invention is based on the object of developing the generic method and the generic device such that a uniform surface quality of a bore is achieved even in the bore region of the direction reversal of the lifting movement of the honing tool.
  • the honing tool 5 (FIG. 2) executes an opposite stroke movement between the reversal points UT and OT (FIG. 1), which limit the length of the stroke.
  • the honing stones 9 (FIG. 2) of the honing tool are pressed against the wall 10 of the cylinder bore of a cylinder to be honed or the like.
  • the speed of the stroke movement is essentially constant between the stroke reversals, as the longer, straight sections of line 1 show in the path-time diagram.
  • FIG. 1 further shows in the lower part with the line 2 the course of the contact pressure of the honing stones 9 against the bore wall 10 according to the invention, which is associated with the lifting movement, over time.
  • the cutting force reduction or interruption of the honing stones during the reversal of the stroke is achieved by a brief reset of the feed device triggered by the stroke control.
  • the entire infeed device is biased against the infeed direction, as a result of which a particularly rapid onset of cutting force reduction or cutting force interruption is achieved, as is also evident from the approximately rectangular profile of the Force characteristic curve 2 (FIG. 1) can be seen over time.
  • a honing device is shown schematically in FIG.
  • the cylinder bore 3 of an engine cylinder block 4 is machined by a honing tool 5 which is rotatably driven in a known manner and which executes a lifting movement H in the direction of the bore axis.
  • the honing tool 5 is connected in an articulated manner via a connecting rod 6 to a honing spindle 7, which is part of a known honing machine (not shown) and can be moved up and down by a hydraulic lifting drive, namely a piston / cylinder arrangement 8.
  • the honing spindle 7 is also driven in a known manner by a rotary drive (not shown) about its longitudinal axis.
  • the honing tool 5 carries honing stones 9 which can be advanced radially outwards by a hydraulically actuated delivery device and can be pressed against the bore wall 10 of a cylinder bore 3 under an application pressure.
  • the hydraulic actuation of the delivery device consists of the piston / cylinder arrangement 11, the piston rod 12 of which pushes a multi-part feed rod 13 through a honing spindle 7 and the connecting rod 6 to the honing tool 5 and leads to the top of an infeed cone 14 of the honing tool.
  • the force of a strong spring 15 presses on the underside of the infeed cone 14 in the opposite direction and causes a mechanical pre-tensioning of the infeed device.
  • the hydraulic cylinder is fed via lines 16, 17 from a hydraulic control unit 18 which is connected to a pressure medium source 19.
  • a 3-way valve 21 interposed, via which the upper cylinder chamber 20 can be connected directly to a return line 22 to the pressure medium container 28.
  • the 3-way valve 21 is connected via a control line 24 to an electrical stroke control device 25, which is mechanically connected to the stroke movement of the honing spindle 7, e.g. B. via a chain drive 26, coupled encoder 27 controls the stroke reversal.
  • the device described in FIG. 2 operates as follows:
  • the displacement sensor 27 connected via the chain drive 26 to the honing spindle 7 moving up and down works as an actual value transmitter and continuously reports the instant stroke position of the honing tool 5 to the stroke control device 25.
  • these values are known in a known manner with predetermined target values for the stroke reversal points ( UT, OT) compared and if the stroke is reversed, the stroke is reversed.
  • the stroke control device 25 also outputs a control signal 24 to the directional control valve 21 for each stroke reversal.
  • the directional control valve 21 switches from the switching position 21a, in which the upper cylinder chamber 20 of the piston / cylinder arrangement 11 is fed by the hydraulic control unit 18 via the line 16 for the purpose of hydraulically actuating the delivery device, to the switching position 21b and remains in this Position as long as the control signal 24 is present.
  • the directional control valve 21 switches back to the switching position 21a and the pressure medium is filled up again via the line 16 in the cylinder space 20 until the preset pressure is reached and the honing stones 9 press against the bore wall 10 again with the appropriate force and to cut.
  • the start, duration and sequence of the control signal 24 is controlled according to the invention by electrical means of stroke reversal known per se so that the actual cutting force reduction or cutting force interruption of the honing stones 9 coincides with the beginning of the duration and sequence of the stroke reversal, taking into account the existing mechanical and hydraulic delay times , as can be clearly seen from the diagram (Fig. 1).
  • the control system is preferably designed so that the beginning of the reduction in cutting force (point C of line 2 in FIG. 1) takes place in good time so that when the stroke reversal begins (point A or B of line 1 in FIG. 1) the preset is already set reduced cutting force F0 is fully reached and is maintained until the end of the stroke reversal (point A 'or B').
  • the method according to the invention of at least reducing, preferably interrupting, the contact pressure of the honing stones and thus their cutting force during the reversal of the stroke can be used for a workpiece during the entire honing period.
  • the method is preferably only used during the finishing machining. It can also be quite sufficient and advantageous to use the method according to the invention during at least one, preferably several, reversals of stroke before the finished dimension is reached.
  • the method according to the invention is not limited to the hydraulic actuation of the delivery device described, but can be used in a suitable form for all known actuations for the delivery of the honing stones.
  • the cutting force reduction according to the invention can be achieved during the reversal of the stroke by a brief reversal of the direction of rotation triggered by the stroke control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (11)

  1. Procédé de fabrication d'alésages d'une qualité de surface élevée dans des pièces, d'alésages (3) dans des blocscylindres (4), notamment, par une finition superficielle, du moins, au moyen d'un rodoir (5) rotatif, qui effectue un mouvement de va-et-vient dans le sens de l'axe de l'alésage (3), et qui présente des pierres à abraser (9), qu'un dispositif d'avance permet d'appliquer dans le sens radial contre la paroi (10) de l'alésage, avec une pression d'appui qui peut être commandée, caractérisé en ce que l'effort de coupe des pierres à abraser (9) tend vers zéro, pendant le mouvement d'inversion du rodoir (5), par suite d'une baisse brutale de la pression d'appui des pierres à abraser (9).
  2. Procédé suivant la revendication 1, caractérisé en ce que la pression d'appui des pierres à abraser (9) est réduite à zéro, pendant le mouvement d'inversion du rodoir (5).
  3. Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que la baisse brutale de la pression d'appui des pierres à abraser (9), pendant le mouvement d'inversion, est assurée par un rappel du dispositif d'avance, déclenché par une commande de course (25).
  4. Procédé suivant l'une quelconque des revendications 1 à 3, caractérisé en ce que le dispositif d'avance est soumis à une tension initiale, opposée au sens d'avance.
  5. Procédé suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que le début, la durée et la fréquence du rappel du dispositif d'avance, compte tenu des temps de retard mécaniques et hydrauliques, de préférence, sont commandés de telle sorte que la baisse effective de la pression d'appui des pierres à abraser (9) coincide avec le début, la durée et la fréquence du mouvement d'inversion, la commande étant conçue, de préférence, de manière que l'effort de coupe réduit, préréglé, soit atteint au début du mouvement d'inversion, et soit maintenu jusqu'à la fin de ce mouvement.
  6. Procédé suivant l une quelconque des revendications 1 à 5, caractérisé en ce que la baisse de la pression d'appui des pierres à abraser (9), lors du mouvement d'inversion, est appliquée pendant toute la durée de rodage d'une pièce.
  7. Procédé suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que la baisse de la pression d'appui des pierres à abraser (9), lors du mouvement d'inversion, est appliquée pendant la finition d une pièce.
  8. Procédé suivant l'une quelconque des revendications 1 à 5, caractérisé en ce que la baisse de la pression d'appui des pierres à abraser (9), lors du mouvement d'inversion, est appliquée pendant une inversion de course, au moins, plusieurs inversions de préférence, avant l'obtention de la dimension finale.
  9. Dispositif pour la mise en oeuvre du procédé suivant l'une quelconque des revendications 1 à 8, avec un rodoir (5) entraîné en rotation, animé d'un mouvement de va-et-vient dans le sens de son axe longitudinal, et muni de pierres à abraser (9), qu'un dispositif d'avance permet d'appliquer contre la paroi (10) de l'alésage à usiner, avec une pression d'appui qui peut être commandée, le dispositif d avance étant actionné par un ensemble cylindre - piston (11), et un distributeur (21), qui permet de relier le compartiment (20) du cylindre à une conduite de retour (22), étant monté sur la conduite d'alimentation en fluide sous pression (16), qui débouche dans le compartiment (20), le distributeur (21) pouvant être commandé en fonction de la course, caractérisé en ce que le dispositif d'avance est muni d'un dispositif de précontrainte, assurant le rappel, qui agit dans le sens opposé au sens d'avance, et en ce que la pression dans le compartiment (20) de l'ensemble cylindre - piston (11) peut être réduite brutalement pendant les inversions de course du rodoir (5), par l'intermédiaire du distributeur (21).
  10. Dispositif suivant la revendication 9, caractérisé par un appareil de commande de course (25), relié au distributeur (21) en vue de délivrer un signal pilote (24).
  11. Dispositif suivant l'une des revendications 9 et 10, caractérisé en ce que le dispositif de précontrainte, composé d'un ressort de pression (15), de préférence, agit sur la face inférieure d'un cône d'avance (14), prévu dans le rodoir (5).
EP85113073A 1984-11-27 1985-10-15 Procédé pour la fabrication d'alésages ayant une surface de haute qualité et dispositif pour la mise en oeuvre du procédé Expired - Lifetime EP0183031B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843443106 DE3443106A1 (de) 1984-11-27 1984-11-27 Verfahren zum herstellen von bohrungen hoher oberflaechenguete und vorrichtung zur durchfuehrung des verfahrens
DE3443106 1984-11-27

Publications (3)

Publication Number Publication Date
EP0183031A2 EP0183031A2 (fr) 1986-06-04
EP0183031A3 EP0183031A3 (en) 1987-12-16
EP0183031B1 true EP0183031B1 (fr) 1991-07-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113073A Expired - Lifetime EP0183031B1 (fr) 1984-11-27 1985-10-15 Procédé pour la fabrication d'alésages ayant une surface de haute qualité et dispositif pour la mise en oeuvre du procédé

Country Status (4)

Country Link
US (1) US4683680A (fr)
EP (1) EP0183031B1 (fr)
JP (1) JPS61131864A (fr)
DE (2) DE3443106A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191864A (en) * 1992-02-03 1993-03-09 Briggs & Stratton Corporation Engine cylinder bore
US6095907A (en) * 1998-10-02 2000-08-01 Kennametal Inc. Reciprocating assembly for abrading a workpiece
US6962279B1 (en) * 2000-10-18 2005-11-08 Ge Medical Systems Global Technology Company, Llc Apparatus and method for glass separation for flat panel displays
US6786807B2 (en) 2002-09-03 2004-09-07 Micromatic Operations, Inc. Universal coupling for machine tool
DE202008012092U1 (de) 2008-09-08 2010-02-11 Gehring Technologies Gmbh Vorrichtung zur Anordnung eines Honwerkzeugs an einer Honmaschine
DE102013220507B4 (de) * 2013-10-11 2015-11-05 Gehring Technologies Gmbh Vorrichtung und Verfahren zur Erzeugung einer nicht zylindrischen Innenfläche einer Bohrung
DE102014210012A1 (de) * 2014-05-26 2015-11-26 Elgan-Diamantwerkzeuge Gmbh & Co. Kg Honverfahren zur Feinbearbeitung von Bohrungen
CN111843813A (zh) * 2020-06-29 2020-10-30 西安理工大学 一种液压驱动内燃机缸孔加工珩磨头及其液压回路

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2403546A (en) * 1943-09-27 1946-07-09 Barnes Drill Co Method and apparatus for honing
GB761086A (en) * 1953-08-19 1956-11-07 Barnes Drill Co Fluid pressure gauge for use with honing tools
US3466809A (en) * 1967-06-07 1969-09-16 Barnes Drill Co Machine tool traverse control
JPS5629091Y2 (fr) * 1978-10-03 1981-07-10
JPS5676376A (en) * 1979-11-22 1981-06-23 Fujikoshi Kikai Kogyo Kk Correction of platen of lapping apparatus and lapping apparatus therefore
DE3039467A1 (de) * 1980-10-18 1982-06-03 Maschinenfabrik Gehring Gmbh & Co Kg, 7302 Ostfildern Honmaschine zum bearbeiten von werkstueckbohrungen, insbesondere von sacklochbohrungen und verfahren zum betrieb der honmaschine
GB2111876A (en) * 1981-12-09 1983-07-13 Jones & Shipman Plc Improvements relating to honing

Also Published As

Publication number Publication date
DE3443106C2 (fr) 1992-09-17
DE3583584D1 (de) 1991-08-29
EP0183031A3 (en) 1987-12-16
EP0183031A2 (fr) 1986-06-04
US4683680A (en) 1987-08-04
JPS61131864A (ja) 1986-06-19
DE3443106A1 (de) 1986-06-05
JPH0364271B2 (fr) 1991-10-04

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