EP2461941A1 - Läppwerkzeug mit schleifstein und läppverfahren mit diesem läppwerkzeug - Google Patents

Läppwerkzeug mit schleifstein und läppverfahren mit diesem läppwerkzeug

Info

Publication number
EP2461941A1
EP2461941A1 EP10751995A EP10751995A EP2461941A1 EP 2461941 A1 EP2461941 A1 EP 2461941A1 EP 10751995 A EP10751995 A EP 10751995A EP 10751995 A EP10751995 A EP 10751995A EP 2461941 A1 EP2461941 A1 EP 2461941A1
Authority
EP
European Patent Office
Prior art keywords
abrasive stone
pusher
lapping
axial direction
stone
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.)
Withdrawn
Application number
EP10751995A
Other languages
English (en)
French (fr)
Inventor
Patrik Piovesana
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2461941A1 publication Critical patent/EP2461941A1/de
Withdrawn legal-status Critical Current

Links

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
    • 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

Definitions

  • the present invention relates to an improved abrasive stone honing machine.
  • the break-in is the last chip removal operation by abrasion.
  • the grinder is the abrasive instrument used to make the break-in. It is constituted by at least one abrasive stick, also called stone and fixed on a support.
  • abrasive stone used in break-in operations of crankcases for example, is most often a silicon carbide stone. This abrasive is very friable.
  • abrasive stone grinders A disadvantage of abrasive stone grinders is the limited service life of abrasive stones. These must be replaced often.
  • the honing machines currently used comprise pushers, which have a side pushing the abrasive stone, this face being parallel to the active face of the abrasive stone and being moved by the actuation of a piece called dagger.
  • the object of the present invention is to provide an improved abrasive stone grinder, which guarantees the dimensional quality of the machined parts throughout the break-in process, including the dimensional quality of the first pieces worked after a change abrasive stone.
  • Another object of the present invention is to provide such an improved honing rod, which is economical, in particular by offering the possibility of using a standard abrasive stone.
  • the present invention relates to an improved abrasive stone grinder, which comprises at least one abrasive stone, a movable pusher in the radial direction of the lap to move radially outwardly the abrasive stone , and a dagger whose displacement according to the axial direction of the lapper causes the displacement of the pusher in the radial direction of the lap, the transformation of the axial movement of the dagger in radial movement of the pusher being obtained by complementary conical shapes of the surfaces in contact with the dagger and the pusher.
  • the thrust surface of the pusher which is in contact with the abrasive stone, makes a very small angle with the axial direction of the lap.
  • this lapper when used for lapping, for example a cylinder block, the lower zone of the active surface of the abrasive stone can be pushed radially further outward than the upper zone of said active surface in the purpose of compensating for the geometry defect of the first run-in cycles after a change of abrasive stone.
  • this very small angle is such that the thrust surface of the pusher has a slope of about 4% with respect to the axial direction of the lap. If the abrasive stone has an axial length of about 90 mm, then the thrust surface of the pusher is inclined relative to the axial direction of the sander so that the lower area of the active surface of the abrasive stone can be radially outwardly a distance of about 40 ⁇ (microns) more than the upper zone of said active surface.
  • the abrasive stone is silicon carbide.
  • FIG. 1 is a schematic representation of the principle of a push rod, and • Figure 2 shows schematically the pusher advanced honing, according to the present invention.
  • an abrasive stone grinder which comprises an abrasive stone 1 of calcium carbide, a pusher, of general reference 2, which is movable radially (arrows R of the figure 1) and radially and outwardly moves the abrasive stone 1, and a dagger, of general reference 3, whose displacement in the axial direction X of the lapper causes the radial displacement of the pusher 2.
  • the transformation of the axial movement (arrow A) of the dagger 3 in radial movement (arrows R) of the pusher 2 is obtained by complementary conical shapes of the surfaces 4 and 5 of two dagger cones 3 which are in contact with two corresponding surfaces 2A and 2B of the pusher 2, respectively.
  • the thrust surface of the pusher 2 in contact with the abrasive stone is a surface parallel to the X axis of the lap. It pushes the abrasive stone 1 leaving the latter parallel to the axis of the lapper, in particular by leaving the active surface 1 A of the abrasive stone 1 parallel to the axis X.
  • NF and upper 1 SUP of the active face 1 A of the abrasive stone 1 remain equidistant from the axis X of the lap.
  • the first pieces worked generally cylindrical surfaces
  • the solution consists in making the lower part of the abrasive stone go out more than the upper part, so as to machine more the lower part of the cylindrical surfaces.
  • the push surface 2P of the pusher 2 which is in contact with the abrasive stone 1, makes an angle " ⁇ " very weak with the axial direction X of the bead, so that the lower zone 1
  • This angle " ⁇ " is such that the thrust surface 2P of the pusher 2 has a slope of about 4% relative to the axial direction X of the lapping machine.
  • the abrasive stone 1 may have an axial length "L" of about 90 mm, and the push surface 2 P of the pusher 2 may then be inclined with respect to the axial direction X of the bead so that the lower zone 1
  • the 2P thrust surface of the tapered pusher according to the invention can be easily made from a cylindrical pusher by removing material on a lathe type machine to go from the cylindrical shape to the conical shape.
  • the present improved honing rod has many advantages, among which the following advantages:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
EP10751995A 2009-08-03 2010-07-12 Läppwerkzeug mit schleifstein und läppverfahren mit diesem läppwerkzeug Withdrawn EP2461941A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0955452A FR2948589B1 (fr) 2009-08-03 2009-08-03 Rodoir a pierre abrasive et procede de rodage mettant en oeuvre ce rodoir
PCT/FR2010/051462 WO2011015745A1 (fr) 2009-08-03 2010-07-12 Rodoir a pierre abrasive et procede de rodage mettant en oeuvre ce rodoir

Publications (1)

Publication Number Publication Date
EP2461941A1 true EP2461941A1 (de) 2012-06-13

Family

ID=41819261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10751995A Withdrawn EP2461941A1 (de) 2009-08-03 2010-07-12 Läppwerkzeug mit schleifstein und läppverfahren mit diesem läppwerkzeug

Country Status (5)

Country Link
EP (1) EP2461941A1 (de)
CN (1) CN102548708B (de)
BR (1) BR112012001281A2 (de)
FR (1) FR2948589B1 (de)
WO (1) WO2011015745A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103317428B (zh) * 2013-07-09 2016-04-20 上海大隆机器厂有限公司 一种珩磨头组合装置
CN111015497A (zh) * 2019-12-26 2020-04-17 苏州信能精密机械有限公司 一种加工大孔径珩磨刀具

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR955452A (de) 1950-01-14
US2694885A (en) 1952-04-22 1954-11-23 Micromatic Honc Corp Honing tool with stones disposed at an angle to the tool axis
US3641715A (en) * 1970-07-13 1972-02-15 Wedge Lock Honing Stone Co Honing apparatus
FR2884889B1 (fr) * 2005-04-25 2007-06-15 Peugeot Citroen Automobiles Sa Carter pour moteur thermique, son procede de fabrication, installation correspondante, et pierre de rodage appartenant a cette installation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011015745A1 *

Also Published As

Publication number Publication date
CN102548708B (zh) 2015-04-29
BR112012001281A2 (pt) 2019-09-24
FR2948589B1 (fr) 2011-07-15
FR2948589A1 (fr) 2011-02-04
CN102548708A (zh) 2012-07-04
WO2011015745A1 (fr) 2011-02-10

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