EP0185180A1 - Verfahren und Vorrichtung zum Verfertigen von Mutternocken, welche als Schablonen für die automatische Produktion von Nockenwellen von Explosions- und Dieselmotoren gebraucht werden und so erhaltene Nocken - Google Patents

Verfahren und Vorrichtung zum Verfertigen von Mutternocken, welche als Schablonen für die automatische Produktion von Nockenwellen von Explosions- und Dieselmotoren gebraucht werden und so erhaltene Nocken Download PDF

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Publication number
EP0185180A1
EP0185180A1 EP85113933A EP85113933A EP0185180A1 EP 0185180 A1 EP0185180 A1 EP 0185180A1 EP 85113933 A EP85113933 A EP 85113933A EP 85113933 A EP85113933 A EP 85113933A EP 0185180 A1 EP0185180 A1 EP 0185180A1
Authority
EP
European Patent Office
Prior art keywords
cams
mother
shaft
equipment
camshafts
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.)
Ceased
Application number
EP85113933A
Other languages
English (en)
French (fr)
Inventor
Luciano Barbisan
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0185180A1 publication Critical patent/EP0185180A1/de
Ceased 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • B24B19/12—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section for grinding cams or camshafts

Definitions

  • the present invention relates to the production of master cams or master cams which are used in the automatic production of camshafts of internal combustion or diesel engines.
  • the cams of the camshafts of internal combustion and diesel engines are adjusted using master cams which act as the boss for the various cams on the shaft.
  • the production of these mother cams is particularly long and full of difficulties. In addition, if it is not cared for extremely well, it results in defective camshafts reducing the efficiency of relative engines.
  • the object of the present invention is therefore to produce, in a perfect but inexpensive manner, groups or equipment of master cams which can be used as a template in the automatic production of combustion or diesel camshafts.
  • FIG. 1 we will notice that there is a representation of a conventional machine tool for machining camshafts 29.
  • the table 10 moves for the roughing and finishing operation and it returns to its initial position at the end of the rectification cycle.
  • the grinding wheel 7 is erected using the diamond roller 11.
  • the camshaft 29 is removed and automatically replaced by another.
  • a camshaft has been chosen as an example for a three-cylinder engine with six cams, three for the intake and three for the exhaust.
  • the mother cams which are mounted in the cylinder head of the machine are numbered from 1 to 6 and they form a group or equipment 8 which is made integral with the shaft 29 to be rectified.
  • Fig. 2 shows the proposed apparatus which can carry out using a single grinding wheel 22 the simultaneous grinding of the six mother cams from 1 to 6 in a minimum of time by obtaining a high precision profile and a perfect grinded surface without the slightest facet.
  • the grinding wheel 22 or the equipment 8 is preferably reciprocated back and forth in the direction of arrow A, that is to say parallel to the axis of the mother cams. This is a means which makes the running-in operation superfluous.
  • the proposed equipment is digitally controlled and can produce any cam profile by entering data on the control device.
  • the latter by acting on the stepping motor 25 which rotates the group or equipment 8, as well as on the stepping motor 26 which advances the grinding wheel 22 in the direction of arrow B, is responsible for working all the cams at the same time. They will therefore have, at the end of the work, the same orientation.
  • the equipment 8 shown in Figures 1 and 3 consists of a toothed shaft 13 on which are threaded the six raw cams 17, whose profile has been shown in fig. 4 by a dotted and dashed line. They have a corresponding internal toothing 33 (FIG. 4) capable of receiving the toothed shaft 13.
  • the raw cams 17 are rigidly locked by the cover 14 and by the nuts 15.
  • Figure 4 is a sectional view of the equipment 8 where the line with dots and dashes shows the profile of the raw mother cams 17 before having been rectified, while by 19 was indicated the profile after the rectification operation .
  • the grinding cycle of the grinding wheel 22 is carried out by the diamond roller 23 mounted on the carriage 24 which makes the latter travel, in the direction of arrow C, the entire width of the grinding wheel 22.
  • This operation is easily carried out by removing the mother cams from the toothed shaft 13 and by shifting these same cams, relative to one another, by the desired angle.
  • a toothing is used where each tooth is phase-shifted at an angle of 15 °. This phase shift can be used for each number of cams normally used.
  • FIG. 5 represents an axial view of the equipment 8 obtained after having displaced each mother cam at an angle in correspondence with the cams of the distribution shaft 29. At this point the equipment 8 is ready to be mounted on the machine tool of fig. 1 which can mass produce the desired camshaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP85113933A 1984-11-16 1985-11-01 Verfahren und Vorrichtung zum Verfertigen von Mutternocken, welche als Schablonen für die automatische Produktion von Nockenwellen von Explosions- und Dieselmotoren gebraucht werden und so erhaltene Nocken Ceased EP0185180A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23638/84A IT1177246B (it) 1984-11-16 1984-11-16 Metodo e apparecchiatura atti a realizzare le camme madri utilizzate quali campioni nella produzione automatica degli alberi di distribuzione dei motori a scoppio e diesel e camme cosi' ottenute
IT2363884 1984-11-16

Publications (1)

Publication Number Publication Date
EP0185180A1 true EP0185180A1 (de) 1986-06-25

Family

ID=11208790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113933A Ceased EP0185180A1 (de) 1984-11-16 1985-11-01 Verfahren und Vorrichtung zum Verfertigen von Mutternocken, welche als Schablonen für die automatische Produktion von Nockenwellen von Explosions- und Dieselmotoren gebraucht werden und so erhaltene Nocken

Country Status (2)

Country Link
EP (1) EP0185180A1 (de)
IT (1) IT1177246B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602705A1 (fr) * 1986-08-07 1988-02-19 Uni Cardan Ag Procede et dispositif de fabrication de cames
EP0269100A2 (de) * 1986-11-27 1988-06-01 Emitec Gesellschaft für Emissionstechnologie mbH Verfahren und Vorrichtung zum Schleifen von Nockenscheiben
DE3640563A1 (de) * 1986-08-07 1988-06-09 Uni Cardan Ag Verfahren und vorrichtung zum fertigstellen von nockenscheiben
DE4318841A1 (de) * 1993-06-07 1994-12-08 Schaudt Maschinenbau Gmbh Verfahren und Maschine zum Schleifen von Nockenwellen
GB2324487A (en) * 1997-04-26 1998-10-28 Mechadyne Ltd Method of manufacturing a multi-component camshaft
US7131921B2 (en) * 2002-09-05 2006-11-07 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Belt-driven conical-pulley transmission
WO2010139633A1 (de) * 2009-06-02 2010-12-09 Mahle International Gmbh Nockenschleifvorrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191222895A (en) * 1912-10-08 1913-08-21 John Holroyd And Company Ltd Improvements in and connected with Machines for Grinding or Milling Cam Shafts, Cams, Turbine Blades and the like Articles.
US2331089A (en) * 1942-01-15 1943-10-05 Norton Co Grinding machine
FR1014601A (fr) * 1950-02-24 1952-08-19 Appareil de génération de cames-mères à came-type virtuelle
US3222822A (en) * 1962-09-07 1965-12-14 Irving G Winer Cam finishing apparatus
CH604988A5 (en) * 1976-03-11 1978-09-29 Willemin Machines Sa Machining and finishing of workpiece with non-circular surface

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191222895A (en) * 1912-10-08 1913-08-21 John Holroyd And Company Ltd Improvements in and connected with Machines for Grinding or Milling Cam Shafts, Cams, Turbine Blades and the like Articles.
US2331089A (en) * 1942-01-15 1943-10-05 Norton Co Grinding machine
FR1014601A (fr) * 1950-02-24 1952-08-19 Appareil de génération de cames-mères à came-type virtuelle
US3222822A (en) * 1962-09-07 1965-12-14 Irving G Winer Cam finishing apparatus
CH604988A5 (en) * 1976-03-11 1978-09-29 Willemin Machines Sa Machining and finishing of workpiece with non-circular surface

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2602705A1 (fr) * 1986-08-07 1988-02-19 Uni Cardan Ag Procede et dispositif de fabrication de cames
DE3640563A1 (de) * 1986-08-07 1988-06-09 Uni Cardan Ag Verfahren und vorrichtung zum fertigstellen von nockenscheiben
EP0269100A2 (de) * 1986-11-27 1988-06-01 Emitec Gesellschaft für Emissionstechnologie mbH Verfahren und Vorrichtung zum Schleifen von Nockenscheiben
EP0269100A3 (de) * 1986-11-27 1990-05-16 Emitec Gesellschaft für Emissionstechnologie mbH Verfahren und Vorrichtung zum Schleifen von Nockenscheiben
DE4318841A1 (de) * 1993-06-07 1994-12-08 Schaudt Maschinenbau Gmbh Verfahren und Maschine zum Schleifen von Nockenwellen
GB2324487A (en) * 1997-04-26 1998-10-28 Mechadyne Ltd Method of manufacturing a multi-component camshaft
US7131921B2 (en) * 2002-09-05 2006-11-07 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Belt-driven conical-pulley transmission
WO2010139633A1 (de) * 2009-06-02 2010-12-09 Mahle International Gmbh Nockenschleifvorrichtung

Also Published As

Publication number Publication date
IT8423638A1 (it) 1986-05-16
IT1177246B (it) 1987-08-26
IT8423638A0 (it) 1984-11-16

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