EP0272339A1 - Mécanisme d'avance pour un outil de honage abrasif - Google Patents

Mécanisme d'avance pour un outil de honage abrasif Download PDF

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Publication number
EP0272339A1
EP0272339A1 EP86117850A EP86117850A EP0272339A1 EP 0272339 A1 EP0272339 A1 EP 0272339A1 EP 86117850 A EP86117850 A EP 86117850A EP 86117850 A EP86117850 A EP 86117850A EP 0272339 A1 EP0272339 A1 EP 0272339A1
Authority
EP
European Patent Office
Prior art keywords
delivery device
adjusting
tool
friction
actuator
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.)
Granted
Application number
EP86117850A
Other languages
German (de)
English (en)
Other versions
EP0272339B2 (fr
EP0272339B1 (fr
Inventor
Peter Baum
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
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Application filed by Maschinenfabrik Gehring GmbH and Co KG filed Critical Maschinenfabrik Gehring GmbH and Co KG
Priority to EP19860117850 priority Critical patent/EP0272339B2/fr
Priority to DE8686117850T priority patent/DE3676310D1/de
Priority to ES86117850T priority patent/ES2019581B3/es
Publication of EP0272339A1 publication Critical patent/EP0272339A1/fr
Application granted granted Critical
Publication of EP0272339B1 publication Critical patent/EP0272339B1/fr
Publication of EP0272339B2 publication Critical patent/EP0272339B2/fr
Anticipated expiration legal-status Critical
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
    • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes

Definitions

  • the invention relates to a delivery device for a reaming tool according to the preamble of claim 1.
  • Reaming tools are usually preset manually to the bore size to be created.
  • mechanical adjusting devices are known which are arranged either on the tool itself or on an adapter for receiving the tool and which allow the friction surfaces to be widened by hand by means of an adjusting nut.
  • Reaming tools usually have a very long service life.
  • the wear compensation which also has to be carried out manually on the adjusting device, is usually not significant in terms of time. Nevertheless, in some cases it is desirable to make this adjustment automatically.
  • the invention has for its object to provide a delivery device of this type so that it works automatically while avoiding the disadvantages shown and ensures a reliable and extremely accurate adjustment and adjustment of reaming tools with a simple structure, with very high feed forces can be safely transmitted.
  • the automatically operating feed device is of simple construction and ensures a very precise and safe setting and readjustment of the reaming tool even with high feed forces.
  • the delivery device acts directly on the reaming tool.
  • the invention proposes for the first time to directly actuate the appropriately designed actuator, which is arranged on the reaming tool and which actuates the expanding mechanism of the reaming tool, by means of a mechanical adjusting device acting on the tool from the outside.
  • the tool can advantageously be held immovably outside the workpiece by a holding device.
  • 1 has a preferably cylindrical shaft 2, which has a clamping end 3 for attachment to a (not shown) honing machine, an adjoining threaded section 4, and a conically widening shaft part 5.
  • the shaft part 5 carries a known friction sleeve 6, which is provided on its outer circumference with a cutting surface 7, for example an electroplated diamond layer.
  • An actuator designed as an adjusting nut 8 is screwed onto the threaded section 4 of the shaft 2 and has a toothing 9 on its outer circumference.
  • the friction sleeve 6 is fixed in the axial direction on the shaft part 5 between a pressure ring 10 and an end disk 13 arranged at a distance from the front end 12 of the shaft 2.
  • the pressure ring 10 is supported on an end face 11 of the adjusting nut 8.
  • the face plate 13 is aligned with a centering lug 14 concentrically with the friction sleeve 6 and non-positively connected to the shaft 2 via a pull rod 15. It interacts with a spring assembly 16 surrounding it, which is arranged in a blind bore 17 running coaxially in the shaft part 5.
  • the spring assembly is clamped between an end collar 18 of the pull rod 15 and a closure disk 19. It closes the bore 17 and is firmly connected to the shaft 2, preferably screwed.
  • the pull rod 15, which is guided through the closure disk 19 and the end disk 13, has a threaded end section 20, onto which a nut 21 is screwed, which in the assembled position rests against the end face 22 of the end disk 13.
  • the end plate 13 is pressed under the force of the spring assembly 16 against the annular end face 24 of the friction sleeve 6.
  • the ratios are chosen so that the axially directed machining forces occurring during the honing process cannot cause any undesired displacement of the friction sleeve on the shaft 2.
  • the adjusting nut 8, the shaft 2 or the shaft part 5 and the pull rod 15 with the spring assembly 16 form an expansion device 1a for the friction sleeve 6.
  • the adjusting device 25 consists essentially of a toothed rack 26 which can be brought into engagement with the toothing 9 of the adjusting nut 8 by means of a first adjusting cylinder 27 (FIG. 2) via a sliding piece 30 guided in guides 28, 29. In this position, the toothed rack 26 is displaceably guided in a groove-shaped recess 33 with a second adjusting cylinder 31 transversely to the tool axis in a cross piece 32 which is firmly connected to the sliding piece 30.
  • the adjusting cylinder 27 and the guides 28, 29 are mounted in a fixed position on a bracket 34 fixedly attached to the machine stand (not shown).
  • the piston rod 35 of the adjusting cylinder 27 is connected to the sliding piece 30 via two drivers 36 (FIG. 2). They are firmly screwed to the sliding piece 30 and engage with a nose-shaped projection 37 in an annular groove 38 of the piston rod 35.
  • the conditions are such that there is play on all sides between the piston rod 35 and driver 36 transversely to the axial direction of the piston rod, as a result of which any misalignment between the adjusting cylinder 27 and the sliding piece 30 is harmless.
  • the drivers 36 are in opposite directions Directions on the sliding piece 30 before.
  • Adjustable stop screws 39 are screwed into the projecting sections, which stop on an adjacent end face 40 of the guides 28 and 29, respectively, when the toothed rack 26 is in engagement with the adjusting nut 8.
  • the adjusting cylinder 31 is mounted transversely to the adjusting cylinder 27 on the crosspiece 32 in alignment with the rack 26 so that its center axis lies approximately in the center plane of the rack 26.
  • the piston rod 41 of the adjusting cylinder 31 is connected directly to the rack 26 by means of two drivers 42.
  • the drivers 42 engage with nose-shaped projections 43 in an annular groove 44 on the piston rod 41.
  • the stroke of the adjusting cylinder 31 is preferably chosen so large that it corresponds to a full tooth pitch of the toothing 9. The stroke can also correspond to several full tooth pitches.
  • a fork 45 is secured, which secures the reaming tool against twisting during delivery.
  • two diametrically opposed wrench surfaces 46 are attached to the reaming tool between the cylindrical clamping end 3 and the threaded section 4, the wrench size of which corresponds to the opening 47 of the fork 45.
  • a counter-holding device 48 is provided in order to absorb the radially acting force component occurring during the infeed, which would otherwise force the tool away.
  • the counter-holding device 48 essentially consists of a two-armed lever 49 which is pivotably mounted on a support arm 50.
  • the lever 49 has a fork 45 opposite end 51, which is preferably prismatic.
  • the support arm 50 is (in a manner not shown) rigidly connected to the console 34 or the machine stand (not shown).
  • the linkage 52 is adjustable in length in a known manner, e.g. by means of a turnbuckle screw 55, which enables a precise setting of the contact of the lever end 51 on the clamping end 3.
  • a second counter-holding device 56 which is arranged at a greater axial distance from the counter-holding device 48 and the tool 1.
  • a counter piece 58 is fastened to the lower free end of the tool 1 on a device plate 57 which is fixed on the machine side.
  • the adjusting cylinder 27 Before the start of an adjustment cycle, the adjusting cylinder 27 is in the retracted state (not shown), and the adjusting device 25 is at a greater radial distance from the machining axis of the reaming tool 1.
  • the lever 49 is located Bracket 48 due to its articulated connection with the adjusting device 25 via the linkage 52, the turnbuckle screw 55 and the bearing block 54 in a pivoted-out position (not shown). The conditions are always such that all parts are outside an interference circle of the honing machine.
  • the readjustment cycle is triggered by a signal from a manual or preferably automatic metering device known per se and therefore not shown.
  • the reaming tool 1 moves in the axial direction into a predetermined position. In this position, the tool is located completely outside the workpiece, and the toothing 9 of the adjusting nut 8 is approximately at the height of the toothed rack 26.
  • a positioning drive which is known per se and therefore also not shown, then rotates the reaming tool into a predetermined angular position, which is selected in this way that the key surfaces 46 on the shaft 2 are aligned with the opening 47 of the fork 45.
  • the adjusting cylinder 27 is then subjected to low pressure, whereupon the piston rod 35 extends and the adjusting device 25 moves radially in the direction of the honing tool 1.
  • the fork opening 47 receives the shaft 2 on its key surfaces 46 and the toothed rack 26 comes into meshing engagement with the toothing 9 of the adjusting nut 8.
  • the movement of the adjusting device 25 is by the stop screws 39 limited, which are set so that the toothed rack 26 meshes with the adjusting nut 8 with little play.
  • This position is detected by a control device (not shown) which then increases the pressure in the adjusting cylinder 27.
  • the second adjusting cylinder 31 is subjected to high pressure. He then shifts the rack 26 by, for example, one tooth pitch.
  • the adjusting nut 8 which is in engagement with the toothed rack 26 is correspondingly rotated by a small angle. It causes an expansion of the friction sleeve 6 by a certain amount, for example 0.001 mm in diameter, by means of the expansion device 1a described or its expansion mechanism on the tool.
  • the honing tool 1 is secured against rotation by the fork 45 and held in position with respect to the predetermined machining axis by the counter-holding devices 48, 56.
  • the adjusting cylinder 27 and then the adjusting cylinder 31 first return to their starting position, the readjusting cycle is completed and the reaming tool is released for the next work operation.
  • the stroke of the adjusting cylinder 31 preferably corresponds to one or more full tooth pitches, which ensures in a simple manner that the toothing of the toothed rack 26 and adjusting nut 8 gap on tooth with each further readjustment. If tooth is on tooth in the worst case during the first adjustment, the rack 26 is first automatically moved by means of the adjusting cylinder 31 until the desired engagement position is reached. Only then is the pressure in the adjusting cylinder 27 increased and the actual readjustment carried out in the manner described. The initially low pressure in Adjusting cylinder 27 excludes damage between rack 26 and adjusting nut 8.

Landscapes

  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP19860117850 1986-12-20 1986-12-20 Mécanisme d'avance pour un outil de honage abrasif Expired - Lifetime EP0272339B2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19860117850 EP0272339B2 (fr) 1986-12-20 1986-12-20 Mécanisme d'avance pour un outil de honage abrasif
DE8686117850T DE3676310D1 (de) 1986-12-20 1986-12-20 Zustelleinrichtung fuer ein reibhonwerkzeug.
ES86117850T ES2019581B3 (es) 1986-12-20 1986-12-20 Dispositivo de ajuste para una herramienta de bruñido por frotacion.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19860117850 EP0272339B2 (fr) 1986-12-20 1986-12-20 Mécanisme d'avance pour un outil de honage abrasif

Publications (3)

Publication Number Publication Date
EP0272339A1 true EP0272339A1 (fr) 1988-06-29
EP0272339B1 EP0272339B1 (fr) 1990-12-19
EP0272339B2 EP0272339B2 (fr) 1994-06-22

Family

ID=8195664

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860117850 Expired - Lifetime EP0272339B2 (fr) 1986-12-20 1986-12-20 Mécanisme d'avance pour un outil de honage abrasif

Country Status (3)

Country Link
EP (1) EP0272339B2 (fr)
DE (1) DE3676310D1 (fr)
ES (1) ES2019581B3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194821A (en) * 1938-08-19 1940-03-26 Norton Co Honing machine
DE2619741A1 (de) * 1976-05-05 1977-11-17 Gehring Gmbh Maschf Zustellvorrichtung fuer ein zerspanwerkzeug zum bearbeiten von werkstueckbohrungen, insbesondere ein honwerkzeug
DE2908422A1 (de) * 1978-03-06 1979-09-13 Citroen Sa Schleifkopf
EP0163983A2 (fr) * 1984-06-07 1985-12-11 Maschinenfabrik Gehring GmbH & Co. Procédé pour l'avance de l'outil d'honage et dispositif pour la mise en oeuvre du procédé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2194821A (en) * 1938-08-19 1940-03-26 Norton Co Honing machine
DE2619741A1 (de) * 1976-05-05 1977-11-17 Gehring Gmbh Maschf Zustellvorrichtung fuer ein zerspanwerkzeug zum bearbeiten von werkstueckbohrungen, insbesondere ein honwerkzeug
DE2908422A1 (de) * 1978-03-06 1979-09-13 Citroen Sa Schleifkopf
EP0163983A2 (fr) * 1984-06-07 1985-12-11 Maschinenfabrik Gehring GmbH & Co. Procédé pour l'avance de l'outil d'honage et dispositif pour la mise en oeuvre du procédé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VDI-ZEITSCHRIFT, Band 123, Nr. 15/16, August 1981, Seiten 661-671, D}sseldorf; U. KLINK "Fachgebiete in Jahres}bersichten: Honen" *

Also Published As

Publication number Publication date
DE3676310D1 (de) 1991-01-31
ES2019581B3 (es) 1991-07-01
EP0272339B2 (fr) 1994-06-22
EP0272339B1 (fr) 1990-12-19

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