EP0535201B1 - Procede a honer d'alesages - Google Patents

Procede a honer d'alesages Download PDF

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Publication number
EP0535201B1
EP0535201B1 EP92908731A EP92908731A EP0535201B1 EP 0535201 B1 EP0535201 B1 EP 0535201B1 EP 92908731 A EP92908731 A EP 92908731A EP 92908731 A EP92908731 A EP 92908731A EP 0535201 B1 EP0535201 B1 EP 0535201B1
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EP
European Patent Office
Prior art keywords
honing
tool
bore
stones
guide strips
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
EP92908731A
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German (de)
English (en)
Other versions
EP0535201A1 (fr
Inventor
Ulrich Klink
Joachim Wiederhold
Bernd Gehrung
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
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Maschinenfabrik Gehring GmbH and Co KG
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Publication date
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Application filed by Maschinenfabrik Gehring GmbH and Co KG filed Critical Maschinenfabrik Gehring GmbH and Co KG
Priority to EP92908731A priority Critical patent/EP0535201B1/fr
Publication of EP0535201A1 publication Critical patent/EP0535201A1/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
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/10—Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B33/00—Honing machines or devices; Accessories therefor
    • B24B33/08—Honing tools
    • B24B33/084—Honing tools having honing stones at the end of bars

Definitions

  • the invention relates to a method for honing holes at the end of the hole, for example blind holes.
  • honing tools are known in which short honing stones are arranged at the lower end of the tool body (DE-PS 30 39 467 or EP-A-0 219 825). They are used for pre-machining the hole in the area of the bottom of the hole. Without this preprocessing, the bore would remain narrower in this lower area when machining with honing stones of normal length, because the honing tool cannot move out of the bore with part of its length there, as at the other end of the bore, during its axial movement.
  • the short honing stones can be used simultaneously with longer honing stones, which are then also arranged on the tool body, for material removal are used on the bore wall, or the machining takes place in two successive steps, the bore at the inner end first being widened by means of the short honing stones and then the bore wall being machined over its entire length using the honing stones, which in this case are arranged on a second tool could be.
  • the simultaneous processing with the short honing stones and the longer honing stones requires a complicated control, so that the processing in successive work steps is easier.
  • a tool change is necessary for this, the tool with the short honing stones being exchanged for a tool with honing stones, or a transfer of the workpiece to another work spindle; however, control is simpler and the machining result is better in many cases.
  • Machining errors can occur during the pre-machining of the inner bore end using the honing tool with short honing stones because the tool does not have sufficient guidance in the bore and therefore tends to wobble.
  • the machined area of the hole is then no longer exactly coaxial to the hole axis.
  • the invention has for its object to improve the machining accuracy at the end of the bore in a method for honing bores.
  • the method according to the invention results in additional guidance and unyielding support of the tool in the bore, especially in the area in which the honing stones themselves are not or not sufficiently effective for the guidance, i.e. in the central area of the bore and in the case of blind holes in the area of the upper end of the bore and, if the honing stones are arranged at the upper end of the tool, also in the lower bore area.
  • the radially rigid support of the honing tool by means of guide strips can only be provided in this area located outside the working area of the honing stones, the guide strips of the honing tool used being to have a greater length than the honing stones.
  • the honing stones are, as usual, delivered in the direction of the bore wall by means of a feed device, for example in a manner known per se by means of swivel bars, which are pivotably mounted at one end and each carry one of the honing stones at their other end.
  • a feed device for example in a manner known per se by means of swivel bars, which are pivotably mounted at one end and each carry one of the honing stones at their other end.
  • the infeed movement of the honing stones distributed over the circumference of the tool body is conical, which results in a distribution of the infeed pressure which is favorable for machining.
  • the honing stones can also be radially displaced in relation to the tool axis when infeed.
  • the guide strips could be arranged above or below the honing stones and aligned with them, so that, in addition, adjustable honing strips could also be arranged on the tool body, which then in each case conflict two guide strips or honing stones would extend.
  • the guide strips there is provision for the guide strips to be radially displaceable or pivoted independently of the infeed of the honing stones, so that the contact pressure of these strips on the bore wall can be selected and controlled as required.
  • Fig. 1 shows a partial section of a workpiece 1 with a cylindrical blind bore 2, at the inner end of which a narrow recess 3 is provided, which directly adjoins the bottom 4 of the bore.
  • a boring is common in blind holes, but not always present.
  • material should first be removed from the bore wall in the vicinity of the base of the bore, so that an expansion 5 is produced.
  • a hollow cylindrical tool body 10 which is essentially rotationally symmetrical with respect to its tool axis 11 and is extended at its upper end to form a pin 12 of smaller diameter.
  • Radially aligned pins 13 projecting over the pin circumference are inserted into the pins, with which the tool is inserted in the manner of a bayonet connection into a schematically indicated tool spindle 14 which belongs to the honing machine (not shown) and drives the tool.
  • swivel bars 15 are mounted on the tool body 10 and are arranged uniformly distributed over the circumference of the tool body.
  • the swivel bars 15 each have a short honing stone 17 at their lower end, which is adjacent to the lower tool end 16 and is said to be very wear-resistant.
  • diamond honing stones are provided.
  • the swivel bars 15 are much longer than the honing stones 17 and in grooves 18 of the tool body 10. They are pivotally mounted at their upper ends by means of a bolt 19 each.
  • an infeed device 22 Located within a central longitudinal bore 21 of the tool body 10 an infeed device 22 which has a conical body 23 which is fastened to a central push rod 24 by means of a cross pin.
  • the conical body 23 lies with its outer surface against a surface of an extension 20 of the associated swivel ledge 15 which is formed with the same inclination.
  • a guide bar 25 is arranged in each case between two swivel bars 15, so that six guide bars are thus present in the exemplary embodiment shown.
  • Grooves 26 are provided in the tool body for receiving and guiding the guide strips.
  • the guide strips have a wear-resistant, non-cutting sliding coating 27 over their entire axial length, which can be made of hard metal, gray cast iron, plastic or another suitable sliding material.
  • the guide strips 25 are radially adjustable. For this purpose, they have two conical lugs 28 which interact with a second feed device 29.
  • This second feed device 29 is also located in the central longitudinal bore 21 of the tool body 10 and essentially consists of a hollow push rod 31 which coaxially surrounds the push rod 24 of the Honstein feed device 22 and has two conical projections 30.
  • the rod 31 has between the two conical projections 30 a transverse bore 32 which is from the transverse pin of the conical body 23 of the feed device 22 is penetrated and has an axial extension, which allows the axial movement of the push rod 24 independently of the hollow push rod 31.
  • the two conical projections 30 rest against the conical surfaces of the projections 28 of the guide strips 25, so that an axial movement of the push rod 31 is converted into a radial movement of the guide strips 25, the guide strips remaining aligned parallel to the tool axis 11.
  • the length of the honing stones 17 is dimensioned such that it corresponds approximately to three times the axial length of the recess 3.
  • the tool is driven to rotate about its axis 11 and at the same time is moved axially up and down in short strokes, so that the widening 5 is created.
  • the recess 3 allows the honing stones 17 to overflow downward beyond the inner edge of the bore wall.
  • the honing tool is constantly guided in the bore 2 by means of the guide strips 25.
  • a predefinable contact pressure of the guide strips 25 on the bore wall is generated, so that a constant sliding guidance is ensured.
  • the length of the guide strips 25 should be a multiple, at least three times the length of the honing stones 17.
  • the guide strips 25 should be arranged such that the honing tool is also guided in the upper region of the bore 2.
  • the honing by means of the honing stones 17 can be measurement-controlled in a known manner, for which purpose one or more measuring points are to be provided, which are connected to a measuring device stand, which records the dimensional and shape errors of the workpiece bore and, if necessary, triggers a correction control.
  • the bore 2 is further processed over its entire length with correspondingly long honing stones which, as usual, can be fed radially and at right angles to the tool axis 11.
  • the tool can be exchanged for a tool with honing stones, or the workpiece can be transported to another tool spindle of the machine, where a correspondingly designed honing tool is available.
  • the tool can also be designed such that the guide strips 25 can be exchanged for honing stones, so that after finishing the preliminary processing, only honing stones have to be used instead of the guide strips and the machining can then be continued with the same tool.
  • FIG. 3 schematically shows a workpiece with a bore 6 which runs obliquely to its end face, so that the bore axis 11A, as can also be seen from FIG. 4, runs obliquely to the plane 8 in which the upper boundary of the bore 6 lies.
  • This bore is machined with the honing tool according to FIG. 5, which largely corresponds in structure to the tool according to FIG. 1.
  • the tool also has swivel bars 15A, which, however, are pivotably mounted at the lower end of the tool body 10A and each carry a honing stone 33 at their upper end. Since the honing stones at the upper end of the bore have to work with an overflow, i.e. with every upward stroke of the tool with about a third of their length extend out of the hole, they can not support themselves evenly on the hole wall; 5 shows, the bore wall on the opposite side of the honing stone 33 shown is shorter, so that the honing stones present there (not shown) have to extend much further out of the bore than the honing stone 33 shown.
  • the tool according to FIG. 5 is used for machining the bore 6, which has the diameter d1 due to pre-machining such as fine boring.
  • the guide strips 25 are first fed hydraulically, so that the feed device 29 with the two cones 30 is adjusted downward under the action of hydraulic pressure.
  • the honing stones 33 are fed in, for which purpose the feed device 22A is also moved downward.
  • This infeed can also be carried out hydraulically, but also mechanically, and a conventional step infeed can be provided.
  • the hole is then machined at the top with short strokes, due to the arrangement of the Honing stones 33 on the swivel bars 15A produce a conical widening at the upper end of the bore, as indicated by the broken line in FIG. 4.
  • This machining is carried out until the upper end of the hole has received dimension d2, which approximately corresponds to finished dimension d3.
  • the bore is then honed to the finished dimension d3 using conventional honing stones.
  • the dimension d2 should be at the lower tolerance limit of the finished dimension d3.
  • Fig. 6 shows the upper end of a bore 7, which is narrowed unevenly there.
  • the illustration is exaggerated in the relative dimensions for clarification.
  • Such unequal constrictions can result from the end of the hole being hardened or coated to meet special requirements.
  • FIG. 7 shows a honing tool which is intended for machining the bore according to FIG. 6.
  • This tool is shown in a blind hole 7, honing stones 17 corresponding to the embodiment according to FIG. 1 also being provided at the lower end of the tool body 10B, but here they can be radially advanced parallel to the tool axis 11B.
  • honing stones 17 corresponding to the embodiment according to FIG. 1 also being provided at the lower end of the tool body 10B, but here they can be radially advanced parallel to the tool axis 11B.
  • the tool can also be designed such that only the upper end of the bore is machined.
  • the honing stone carriers 36 are adjusted by the two cones of the feed device 38, while the cone of the middle feed device 37 has guide strips 35 assigned.
  • These guide strips 35 also have a sliding coating 35A. They extend up to about the working area of the upper short honing stones 34. The guide strips are therefore effective in the area below the end of the bore, which has the uneven narrowing.
  • the honing stones 36 are fed in, and the honing stones 34 can machine the upper end of the bore with short strokes until the bore diameter there has approximately reached the finished dimension.
  • the bore is then honed to the finished dimension using a conventional honing tool.
  • the lower end of the bore is simultaneously pre-machined by means of the honing stones 17, in accordance with the mode of operation of the tool according to FIG for a good result of the honing near the bottom 4 of the blind hole.
  • any type of double delivery is suitable for the delivery of the guide bars and the bars supporting the honing stones.
  • Such deliveries are known in the prior art in various designs.
  • the double feed device 37, 38 according to FIG. 7 can be designed in such a way that the guide strips 35 do not just have a cone body is assigned, but - in the same way as for the strips 36 - two cone bodies are provided for the feed device 37 in order to ensure an exact parallel alignment of the guide strips 35 to the tool axis 11B.
  • the distribution of the honing stones and the guide strips over the circumference of the honing tool also corresponds to the representation in FIG. 5 and 7 in the embodiment according to FIGS Applying a hydraulic medium to the delivery device.

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

Abstract

L'outil à honer sert au préusinage d'alésages dans leur zone terminale. Des outils à honer connus de ce type sont utilisés pour le pré-honage de trous borgnes près du fond de l'alésage. L'extrémité de l'alésage y est usinée avec de courtes courses de l'outil, dont les pierres abrasives sont très courtes par rapport à la longueur de l'alésage et de l'outil. Afin de garantir néanmoins un appui suffisant de l'outil à honer dans l'alésage (2), et par conséquent un centrage correct, on a prévu pour l'outil à honer selon l'invention des barres de guidage (25) s'étendant dans la zone à l'extérieur des pierres abrasives (17). L'outil peut être utilisé aussi pour l'usinage de l'extrémité supérieure d'alésages dont le plan terminant supérieur est oblique par rapport à l'axe d'alésage, ou lesquels présentent des étranglements asymétriques à l'extrémité de l'alésage.

Claims (13)

  1. Procédé de rodage à la pierre d'alésages, dans lequel la paroi de l'alésage est prérodée à au moins une de ses deux extrémités par des mouvements d'élévation et de rotation d'un rodoir présentant des pierres à roder, tandis que le rodoir est à l'extérieur de la zone de travail de ses pierres à roder, appuyé rigidement radialement contre la paroi de l'alésage, avec utilisation d'un rodoir ayant des pierres à roder (17 ; 33 ; 34) réparties sur le pourtour de son corps (10 ; 10A ; 10B) qui sont plus courtes que ce corps (10 ; 10A ; 10B) et placées en bout sur celui-ci et peuvent être avancées en direction de la paroi de l'alésage, et des lardons de guidage (25 ; 35) associés aux pierres à roder (17 ; 33 ; 34) qui s'étendent sur le pourtour du corps (10 ; 10A ; 10B) du rodoir parallèlement à l'axe (11 ; 11A ; 11B) du rodoir et au moins sur une partie de la longueur de cet axe à l'extérieur de la zone de travail des pierres à roder (17 ; 33 ; 34) et peuvent être avancés en direction de la paroi de l'alésage indépendamment du mouvement d'avance des pierres à roder (17 ; 33 ; 34).
  2. Procédé selon la revendications 1, caractérisé par le fait que l'extrémité inférieure d'un alésage, en particulier d'un alésage de trou borgne, est prérodée et le rodoir est au moins au-dessus des pierres à roder (17) placées à l'extrémité inférieure de son corps (10 ; 10B), appuyé rigidement radialement contre la paroi de l'alésage au moyen des lardons de guidage (25 ; 35).
  3. Procédé selon l'une des revendications 1 et 2, caractérisé par le fait que l'extrémité supérieure d'un alésage est prérodée et le rodoir est, au moins au-dessous des pierres à roder (33 ; 34) placées à l'extrémité supérieure de son corps (10A ; 10B), appuyé rigidement radialement contre la paroi de l'alésage au moyen des lardons de guidage (25 ; 35).
  4. Procédé selon la revendication 3, caractérisé par le fait qu'est prérodée l'extrémité supérieure d'un alésage dont la limite supérieure est située dans un plan (8) incliné par rapport à l'axe (11A) de celui-ci.
  5. Procédé selon l'une des revendications 3 et 4 caractérisé par le fait qu'est prérodée l'extrémité supérieure d'un alésage qui est pourvue de rétrécissements non uniformes sur le pourtour de celui-ci.
  6. Procédé selon l'une des revendications 1 à 5, avec utilisation d'un rodoir dont les lardons de guidage (25 ; 35) sont plus longs que les pierres à roder (17 ; 33 ; 34), la longueur des lardons de guidage (25 ; 35) étant de préférence au moins le triple de la longueur des pierres à roder (17 ; 33 ; 34).
  7. Procédé selon l'une des revendications 1 à 6, avec utilisation d'un rodoir sur lequel au moins quelques-uns des lardons de guidage (25) s'étendent chacun jusqu'entre deux pierres à roder (17 ; 33) voisines.
  8. Procédé selon l'une des revendications 1 à 7, avec utilisation d'un rodoir dont les pierres à roder (17 ; 34) sont mobiles radialement en position parallèle à l'axe (11B) de celui-ci.
  9. Procédé selon l'une des revendications 1 à 7, avec utilisation d'un rodoir dont les pierres à roder (17 ; 33) sont fixées à des lardons basculants (15 ; 15A) qui peuvent être basculés au moyen d'un dispositif d'avance (22 ; 22A).
  10. Procédé selon l'une des revendications 1 à 9, avec utilisation d'un rodoir dont les lardons de guidage (25 ; 35) sont pourvus de préférence sur toute leur longueur d'un revêtement de glissement résistant à l'usure (27 ; 35A) qui est constitué de préférence d'un matériau de glissement résistant à l'abrasion, par exemple métal dur, fonte grise ou plastique.
  11. Procédé selon l'une des revendications 1 à 10, caractérisé par le fait qu'après le prérodage, les lardons de guidage (25) du rodoir sont remplacés par des bâtons rodoirs et le travail de l'alésage est ensuite poursuivi sur toute sa longueur avec le rodoir.
  12. Procédé selon l'une des revendications 1 à 11, avec utilisation d'un rodoir sur lequel les pierres à roder (17 ; 33) et les lardons de guidage (25) sont en nombre égal et uniformément répartis, en alternance, sur le pourtour du corps (10 ; 10A) de celui-ci.
  13. Procédé selon l'une des revendications 1 à 12, avec utilisation d'un rodoir dont les lardons de guidage (25 ; 35) peuvent être avancés par voie hydraulique.
EP92908731A 1991-04-16 1992-04-15 Procede a honer d'alesages Expired - Lifetime EP0535201B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP92908731A EP0535201B1 (fr) 1991-04-16 1992-04-15 Procede a honer d'alesages

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP91106010 1991-04-16
EP91106010 1991-04-16
EP92908731A EP0535201B1 (fr) 1991-04-16 1992-04-15 Procede a honer d'alesages
PCT/EP1992/000844 WO1992018287A1 (fr) 1991-04-16 1992-04-15 Outil a honer pour l'usinage d'alesages

Publications (2)

Publication Number Publication Date
EP0535201A1 EP0535201A1 (fr) 1993-04-07
EP0535201B1 true EP0535201B1 (fr) 1997-01-02

Family

ID=8206624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92908731A Expired - Lifetime EP0535201B1 (fr) 1991-04-16 1992-04-15 Procede a honer d'alesages

Country Status (4)

Country Link
EP (1) EP0535201B1 (fr)
DE (1) DE59207798D1 (fr)
ES (1) ES2097324T3 (fr)
WO (1) WO1992018287A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10358150B4 (de) * 2003-12-10 2009-10-01 Gehring Gmbh & Co.Kg. Verfahren zum Honen von Bohrungen
CN104400613A (zh) * 2014-10-21 2015-03-11 上海交通大学 一种具备形状偏差补偿功能的分段进给珩磨头装置
DE102015201765B3 (de) * 2015-02-02 2016-06-09 Nagel Maschinen- Und Werkzeugfabrik Gmbh Honwerkzeug und Verfahren zu seiner Herstellung

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19542892C2 (de) * 1995-11-17 2000-08-10 Nagel Masch Werkzeug Verfahren und Vorrichtung zum Honen von Kolbenlaufbahnen
DE19601158C1 (de) * 1996-01-15 1997-06-26 Daimler Benz Ag Gehonte Zylinderbohrung eines Hubkolben-Verbrennungsmotors und Verfahren zu ihrer Herstellung
DE60139369D1 (de) 2000-04-05 2009-09-10 Makino Inc Mittels druckmittel aktviertes honwerkzeug
DE102004047520A1 (de) * 2004-09-28 2006-04-06 Gehring Gmbh & Co. Kg Werkzeug zum Honen von Bohrungen mit absatzweise unterschiedlichem Durchmesser (Stufenbohrungen)
GB0500824D0 (en) * 2005-01-15 2005-02-23 Brown Thomas Improvements relating to honing mandrels
JP5002177B2 (ja) * 2006-03-24 2012-08-15 本田技研工業株式会社 ホーニング工具ヘッド及び該ホーニング工具ヘッドを備えるホーニング工作機械
DE102007045607C5 (de) 2007-09-19 2014-06-18 Gehring Technologies Gmbh Verfahren zum Honen der Innenfläche einer Bohrung und Honwerkzeug zur Durchführung dieses Verfahrens
DE102010031221A1 (de) * 2010-07-12 2012-01-12 Robert Bosch Gmbh Honwerkzeug zum Honen von Sacklochbohrungen
DE102012009110B4 (de) * 2012-04-26 2014-05-28 Gebr. Heller Maschinenfabrik Gmbh Honwerkzeug
SE538554C2 (en) * 2014-12-05 2016-09-20 Applied Nano Surfaces Sweden Ab Mechanochemical conditioning tool

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US1772045A (en) * 1926-08-09 1930-08-05 Marsden C Hutto Cylinder grinder
US2263781A (en) * 1936-10-02 1941-11-25 Micromatic Hone Corp Cylinder grinding device
US2166281A (en) * 1937-12-06 1939-07-18 George C Beck Cylinder honing and wiping device
US2421470A (en) * 1943-08-20 1947-06-03 Sunnen Joseph Honing device
US3330078A (en) * 1964-09-08 1967-07-11 Lisle Corp Cylinder ridge hone
DE2120519A1 (de) * 1971-04-27 1972-11-02 Maschinenfabrik Gehring Kg, 7302 Nellingen Honwerkzeug
FR2187498B1 (fr) * 1972-06-06 1979-09-07 Gluckauf Gunther Klerner
US4065881A (en) * 1976-12-06 1978-01-03 Gillette Robert H Guided honing tool
FR2572978B1 (fr) * 1984-11-15 1989-03-03 Pont A Mousson Appareil de rodage de surfaces cylindriques creuses.
DE3537009A1 (de) * 1985-10-17 1987-04-23 Nagel Wolf Verfahren, honmaschine und honwerkzeug zur honbearbeitung von werkstuecken

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10358150B4 (de) * 2003-12-10 2009-10-01 Gehring Gmbh & Co.Kg. Verfahren zum Honen von Bohrungen
CN104400613A (zh) * 2014-10-21 2015-03-11 上海交通大学 一种具备形状偏差补偿功能的分段进给珩磨头装置
CN104400613B (zh) * 2014-10-21 2017-05-24 上海交通大学 一种具备形状偏差补偿功能的分段进给珩磨头装置
DE102015201765B3 (de) * 2015-02-02 2016-06-09 Nagel Maschinen- Und Werkzeugfabrik Gmbh Honwerkzeug und Verfahren zu seiner Herstellung

Also Published As

Publication number Publication date
ES2097324T3 (es) 1997-04-01
EP0535201A1 (fr) 1993-04-07
DE59207798D1 (de) 1997-02-13
WO1992018287A1 (fr) 1992-10-29

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