EP0430816A1 - Verfahren zum Schleifen von Bohrungen in Werkstücken und Maschine für die Durchführung des Verfahrens - Google Patents

Verfahren zum Schleifen von Bohrungen in Werkstücken und Maschine für die Durchführung des Verfahrens Download PDF

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Publication number
EP0430816A1
EP0430816A1 EP90403419A EP90403419A EP0430816A1 EP 0430816 A1 EP0430816 A1 EP 0430816A1 EP 90403419 A EP90403419 A EP 90403419A EP 90403419 A EP90403419 A EP 90403419A EP 0430816 A1 EP0430816 A1 EP 0430816A1
Authority
EP
European Patent Office
Prior art keywords
lapping
expansion
progressive
line
lines
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Withdrawn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
EP90403419A
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English (en)
French (fr)
Inventor
Jean-Claude Pineau
Richard Bonachera
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.)
Procedes Machines Speciales S P M S Ste
Original Assignee
Procedes Machines Speciales S P M S Ste
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 Procedes Machines Speciales S P M S Ste filed Critical Procedes Machines Speciales S P M S Ste
Publication of EP0430816A1 publication Critical patent/EP0430816A1/de
Withdrawn legal-status Critical Current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 present invention relates to a method for lapping bores in parts, as well as to a machine for implementing this method.
  • Lapping (called “honing” in the Anglo-Saxon literature) of bores is carried out at present, either according to the lapping process known as by expansion, or according to the lapping process known as progressive.
  • Lapping by expansion consists in introducing, into the bore to be lapped, an expansion lapping machine animated with a rotary movement and an oscillating movement back and forth along the axis of rotation and in increasing the diameter of the lapping during running in. This expansion is therefore comparable to the advance movement that a tool undergoes during machining operations such as grinding.
  • the main advantage of lapping by expansion is that it allows, thanks to the expansion of the lapping during lapping, to remove a comparatively large amount of material in a single pass.
  • the main drawback of lapping by expansion consists in the fact that a coarse grinding abrasive expansion lapping such as is necessary to obtain a large material removal in a single pass, allows only a relatively low precision and above all a relatively poor surface finish.
  • the progressive lapping consists in making a lapping of a fixed diameter, animated by a movement of a rotation about its axis, a single movement back and forth (back and forth) in a bore. Since the quantity of material removed on each pass is small, it is necessary, when the total quantity of material to be removed is large, to subject each bore to a relatively large number of progressive lapping passes using a relatively number important of successive lappers having increasingly fine grains. This progressive lapping makes it possible to obtain high precision and a good surface condition, but this by means of the use of a large number of lapping devices when the quantity of material to be removed is large. Each of these progressive lappers must be adjusted with precision, so that the setting time of a progressive lapping machine comprising a large number of lappers is long. In addition, the cost price and the size of the lapping machine increases with the number of laps.
  • the present invention relates to a lapping process for bores meeting the two requirements of high precision and significant removal of material.
  • the subject of the invention is also a machine of relatively simple and compact structure and of a reduced cost price allowing a precise running-in, with reduced setting times, on bores requiring a significant removal of material.
  • each bore is subjected successively to a roughing by lapping by expansion followed by a finishing by progressive lapping.
  • the roughing can comprise one or two lapping passes by expansion and the finishing can comprise at least two progressive lapping passes.
  • the machine according to the invention for lapping bore in parts comprises at least one spindle for expansion by lapping, at least two spindles for progressive lapping, and means for bringing each part successively to the spindle for expansion by lapping and each of the progressive lapping pins.
  • a progressive lapping pass requires a time which is substantially half that of an expansion lapping pass. This is the reason why the machine according to the invention can advantageously comprise two parallel lines of lapping by expansion and a single line of progressive lapping, means being provided for bringing to the single line of progressive lapping the rough parts coming from of either of the two lapping lines by expansion.
  • the single progressive lapping line and each of the two expansion lapping lines are provided with independent feed conveyors for the parts
  • the machine is supplied with parts by the conveyor a first of the two lapping lines by expansion
  • the progressive lapping line is arranged downstream of the second lapping line by expansion
  • two independent shuttle carriers are arranged between the two lapping lines by expansion, upstream and downstream of these.
  • a scrap reception line also served by the downstream shuttle transporter is disposed downstream of the first lapping line by expansion.
  • Figures 1 and 2 show, one in side view and the other in plan, a lapping machine according to the invention combining expansion lapping and progressive lapping.
  • the lapping machine as illustrated in FIGS. 1 and 2 comprises, on a common frame 1, a first line 2 of lapping by expansion, a second line 3 of lapping by expansion and a line 4 of progressive lapping.
  • the two lines 2, 3 for lapping by parallel expansion are each served by a conveyor 5, 6, the supply of the machine with the lapping part being effected by the conveyor 5 serving line 2.
  • Line 4 for progressive lapping is served by a transporter 7 which is located downstream and in the extension of the transporter 6 from the second line 3 of lapping by expansion. It is also by the transporter 7 that the lapped parts of the machine are removed.
  • a waste reception line 8 is served by a transporter 9 mounted downstream and in the extension of the transporter 5.
  • a first shuttle conveyor 10 is arranged upstream of the two lines 2, 3 for lapping by expansion and a second shuttle conveyor 11 is arranged downstream of the two lines 2, 3 for lapping by expansion, that is to say also upstream of the progressive lapping line 4 and of the scrap reception line 8.
  • carriers 5, 6, 7, 9, 10 and 11 are independent carriers.
  • the first line of lapping by expansion comprises a lapping unit 12 with a single spindle 13 of lapping by expansion, the lapping unit 12 being followed by a control unit 14.
  • the second line 3 of lapping by expansion comprises a lapping unit 15 with a single spindle 16 for lapping by expansion, the lapping unit 15 being followed by a control unit 17.
  • the progressive lapping line 4 comprises a lapping unit 18 with three pins 19, 20, 21 of progressive lapping, the laps of which are filled with abrasive with grains of increasing fineness.
  • the combination, on a single machine, of lapping by expansion and progressive lapping allows, by means of a reduced number of lapping, to operate precision lapping on bores having initially wide tolerances, lapping by expansion providing a roughing followed by '' a gradual lapping finish with a reduced number of laps.
  • the parallel arrangement of two lapping lines by expansion, the provision of independent transporters for each of the lapping lines, and the arrangement of two shuttle carriers one upstream and the other downstream of the two lapping lines by expansion allows the two roughing lines to be machined optimally by expansion lapping and, after the roughing, to direct the rough parts, according to their state, either on the single finishing line 4 by progressive running-in, ie on line 8 for receiving scrap.
  • each bore to more than one roughing pass by lapping by expansion and / or to provide a finish comprising a number of progressive lapping passes other than three.
  • the invention is also applicable to lapping machines comprising a single roughing line by expansion lapping and / or more than one finishing line by progressive lapping, although the arrangement shown and described constitutes a solution. preferred from the performance point of view, taking into account the different times of expansion lapping and progressive lapping.
EP90403419A 1989-11-30 1990-11-30 Verfahren zum Schleifen von Bohrungen in Werkstücken und Maschine für die Durchführung des Verfahrens Withdrawn EP0430816A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8915837 1989-11-30
FR8915837A FR2654969B1 (fr) 1989-11-30 1989-11-30 Procede de rodage d'alesages dans des pieces, et machine pour la mise en óoeuvre de ce procede.

Publications (1)

Publication Number Publication Date
EP0430816A1 true EP0430816A1 (de) 1991-06-05

Family

ID=9388004

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403419A Withdrawn EP0430816A1 (de) 1989-11-30 1990-11-30 Verfahren zum Schleifen von Bohrungen in Werkstücken und Maschine für die Durchführung des Verfahrens

Country Status (2)

Country Link
EP (1) EP0430816A1 (de)
FR (1) FR2654969B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767276B1 (fr) * 1997-08-14 1999-10-29 Spms Honimatic Machine de rodage a broches multiples
US6250999B1 (en) * 1997-09-12 2001-06-26 Spms Honimatic Multi-spindle lapping machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE871707C (de) * 1951-09-26 1953-03-26 Kordt & Co G M B H Verfahren und Maschine zum Laeppen von Bohrungen
GB1337272A (en) * 1970-01-13 1973-11-14 Hartle Ltd Derek Honing tool arrangements
US4397384A (en) * 1981-03-06 1983-08-09 Nohren Jr John E Manufacturing system and transport assembly
WO1988009080A1 (en) * 1987-05-07 1988-11-17 Black & Decker Inc. Streamlined production of electric motor armatures and stators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE871707C (de) * 1951-09-26 1953-03-26 Kordt & Co G M B H Verfahren und Maschine zum Laeppen von Bohrungen
GB1337272A (en) * 1970-01-13 1973-11-14 Hartle Ltd Derek Honing tool arrangements
US4397384A (en) * 1981-03-06 1983-08-09 Nohren Jr John E Manufacturing system and transport assembly
WO1988009080A1 (en) * 1987-05-07 1988-11-17 Black & Decker Inc. Streamlined production of electric motor armatures and stators

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VDI ZEITSCHRIFT. vol. 127, no. 18, septembre 1985, DUSSELDORF DE page 720 "Mehrfachhonen von Lagerbohrungen" *

Also Published As

Publication number Publication date
FR2654969B1 (fr) 1994-07-22
FR2654969A1 (fr) 1991-05-31

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