EP0035939B1 - Mit einem drehenden Werkzeug versehene Maschine für Reproduktions- oder Polierarbeiten - Google Patents

Mit einem drehenden Werkzeug versehene Maschine für Reproduktions- oder Polierarbeiten Download PDF

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Publication number
EP0035939B1
EP0035939B1 EP81400336A EP81400336A EP0035939B1 EP 0035939 B1 EP0035939 B1 EP 0035939B1 EP 81400336 A EP81400336 A EP 81400336A EP 81400336 A EP81400336 A EP 81400336A EP 0035939 B1 EP0035939 B1 EP 0035939B1
Authority
EP
European Patent Office
Prior art keywords
template
rotative
shaft
guide
tool
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
Application number
EP81400336A
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English (en)
French (fr)
Other versions
EP0035939A1 (de
Inventor
Claude Marc
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.)
Comeca Sa Ste
Original Assignee
Comeca Sa 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 Comeca Sa Ste filed Critical Comeca Sa Ste
Publication of EP0035939A1 publication Critical patent/EP0035939A1/de
Application granted granted Critical
Publication of EP0035939B1 publication Critical patent/EP0035939B1/de
Expired 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
    • B24B17/00—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor
    • B24B17/02—Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor involving mechanical transmission means only

Definitions

  • the present invention relates to a rotary tool machine intended to reproduce on a part the patterns of a template or parent part or to finish a roughed part from a template or parent part.
  • the guides or slides of the tool carriage must be produced in a precise manner and the various members are generally provided with special arrangements limiting their wear, which makes the manufacture of such a machine long and expensive. .
  • this type of machine is more particularly intended for the machining of large series of parts and its use due to its cost cannot be envisaged for small or medium series.
  • the object of the present invention as characterized in the claims below is: the elimination of these drawbacks by using a machine which is simple to produce and inexpensive, particularly intended for machining small series of parts in such a way precise without any adjustment of the position of the workpiece relative to the tool and without particular adjustment of the position of the workpiece relative to the template.
  • Another object of the present invention is to provide a machine of the type defined further with which it is possible to obtain different successive depths of cut without adjusting the position of the part relative to the template.
  • Another object of the invention is the implementation of a machine which does not require qualified personnel for the machining of the parts, which tends to reduce the cost of the finished product despite the small number of parts to be machined in the assumption of use of the machine according to the invention for small series.
  • the rotary tool machine according to the invention can be a machine used for the reproduction of parts from a template or mother piece or a machine of the sander type, used for finishing parts from a template or mother piece .
  • the machine according to the invention for example of the double belt sander type, comprises a frame 1 on which is placed a table 2 provided with at least one work surface 3.
  • the machine In the worktop area, the machine is provided with at least one abrasive rotary tool 4, mounted in a protective casing 5 and provided with at least one guide 6 (fig. 2) cooperating with a template 7 on which is fixed the workpiece 8 previously sketched, the said template and the said part being operated by the user of the machine.
  • at least one abrasive rotary tool 4 mounted in a protective casing 5 and provided with at least one guide 6 (fig. 2) cooperating with a template 7 on which is fixed the workpiece 8 previously sketched, the said template and the said part being operated by the user of the machine.
  • the frame 1 is constituted by four vertical feet 9, of the same length braced at their upper end by two horizontal and parallel beams 10 and by at least one cross member 11 horizontal and perpendicular to said beams at the end of which it is fixed.
  • the longitudinal members 10 are provided with several cylindrical orifices with a vertical axis for the passage of means for fixing the table 2 to the frame 1.
  • the machine is provided with at least three wedges 12 interposed between the side members and the table to adjust the position of the latter relative to the frame and / or to adjust the orthogonality of its work plane relative to the axis of the rotary tool.
  • the table 2 made of metal or the like is in the form of a flat wall, preferably horizontal, of polygonal or curvilinear external contour provided with at least one curvilinear, circular or polygonal contour defining the work plane 3.
  • the contour of the work plane work is such that whatever the position of the user of the machine relative to said contour, it can without any discomfort access the rotary tool.
  • the shape of the worktop outline is such that it also allows the template to be fully disposed on the work surface, despite the position of said template relative to the rotary tool when it works the part.
  • the table is in the form of a rectangle with a longitudinal axis parallel to the side members extended beyond one of its short sides by the work surface 3.
  • This work plan substantially matches the shape of a triangle, the large base of which is perpendicular to the longitudinal axis of the rectangular shape and extends beyond the said shape on either side of its longitudinal sides 13, the said base being wider. than the table.
  • the worktop has two short sides 14 connecting the sides 15 of the triangular shape of the worktop 3 to the longitudinal sides 13 of the rectangular shape of the table 2.
  • the sides 15 are preferably perpendicular to each other. other or form between them an angle greater than a right and are. arranged symmetrically with respect to the longitudinal axis of the rectangular shape of the table.
  • the sides 15 are connected to each other by a rounding for safety reasons obvious to those skilled in the art.
  • the sides 14 of the work surface are perpendicular to the sides 15 to which they are connected or form an obtuse angle with them.
  • the work surface as described is particularly suitable for receiving two rotary tools situated respectively on either side of the longitudinal axis of the table 2.
  • the two rotary abrasive tools are of different grain size to first of all carry out a semi-finishing by working with the tool whose grain size is the most important and a finish by working with the other tool.
  • the user of the machine will engage the previously roughed part and its template on the work surface by one of the short sides 14 and while applying it against the abrasive tool will give it a movement of advance (visualized on Fig. 1 by arrow D) directed on this side 14 towards the area of the work surface located below the longitudinal axis of the table 2.
  • the abrasive tools 4 each consist of an endless abrasive strip partially located in the work plane mounted on rollers 16 and 17 with axes perpendicular to said plane.
  • the abrasive belts are advantageously housed in a protective casing connected to a nozzle 18 for sucking machining waste.
  • This casing is provided with at least two covers mounted on hinges to allow the change of the abrasive belt and / or the rollers 16 and 17.
  • rollers are releasably wedged by any known means on vertical rotary shafts and each engage in an orifice in the table 2 and rotate in bearings located under the said table.
  • the shaft 19 corresponding to the roller 16 is mounted in at least two bearings 20 fixed by any known means to one of the vertical faces of the cross member 11 of the chassis 1.
  • the shaft 21 corresponding to the roller 17 is mounted in at least two bearings 22 fixed on a means for tensioning the strip and for adjusting the parallelism of the two rollers 16 and 17.
  • the shaft 19 beyond its lower bearing 20 is provided with a pulley 23 provided with at least one groove receiving a transmission belt 24 cooperating with a pulley 25 wedged on the output shaft of a motor member 26 secured to the chassis 1.
  • the belt 24 is tensioned by a tensioner 27a known per se, shown diagrammatically in FIG. 1.
  • This tensioner is fixed by any known means to the frame 1 of the machine.
  • the pulley 25 is provided with at least two grooves each receiving a belt 24 for rotating the two rollers 16 of the machine and the two abrasive belts 16.
  • the motor member 26 such as an electric motor is equipped with a member for selecting its direction of rotation and is associated with means for varying the speed of rotation of the abrasive belt 4.
  • the shaft 19 is provided with a collar 27 placed under the roller 16 and at the orifice formed in the table into which the said shaft 19 engages.
  • the upper face of the collar 27 is located above the work surface 3 and the diameter of said collar is less than the diameter of the orifice of the table in which the shaft 19 engages. against the upper face of the collar 27 and under the lower end of the roller 16 is mounted the machining guide 6.
  • the profile of the face 7A is curvilinear and has a succession of hollows and bumps which must be reproduced on the part 9 carried by the template.
  • the guide 6 follows the profile of the reference face 7A so that the workpiece is also driven in advance movement relative to the tool abrasive for reproducing on one of the faces of said part the profile of face 7A.
  • the generator of the rotary tool which penetrates the most into the part 8 is always located in a plane which passes through the axis of rotation of the tool and of the guide and through the point of contact of said guide with the reference face. 7A of the template.
  • This feature makes it possible to reproduce relatively complex profiles on the part without having an imposed angle of attack.
  • the guide 6 is of circular or cylindrical shape, provided with at least one external surface of revolution, for example circular or cylindrical coaxial with the shaft 19 and free in rotation relative to the latter against which abuts. the reference face of the template.
  • the guide 6 is free to rotate relative to the shaft 19 on which it is mounted so that when the said shaft and the tool are rotated the said guide can rotate by friction against the template 7 .
  • the guide 6 is constituted by a rolling member provided with an inner ring 28 coaxial with the shaft 19 on which it is blocked and with an outer ring 29 which is free to rotate relative to said shaft 19.
  • the inner ring 28 is forcibly mounted on the shaft 19 and rests on the upper face of the collar 27.
  • This member also makes it possible to keep the lower end of the roller 16 of the outer ring of the guide at a distance so that the abrasive strip driven by this roller cannot rub against said ring 29.
  • the external radius of the ring 29 is equal to or different from the overall radius of the rotary tool or equal to or different from the roller 16 plus once the thickness of the abrasive strip.
  • the difference between the value of the external radius of the ring 29 and the radius of the rotary tool conditions the value of the maximum penetration of said tool in the part 8.
  • the ring 29 of the rolling member constituting the guide 6 is preferably removable so that the user, depending on the needs of the machining work, can replace it with a ring of larger or greater diameter. small.
  • roller 16 is wedged on the shaft 19 in a removable manner.
  • This arrangement also makes it possible to replace the roller 16 with another roller of larger or smaller diameter, better suited to the profile to be produced on the part 8.
  • the template 7 cooperating with the guide 6 is provided with stops 7B for positioning the workpiece 8.
  • This part is fixed to the template by two lateral flanges 7C known per se.
  • This template is provided with a recess 7D coming to be located under the lower end of the rotary tool so that the face 7A is released from said end when it is in abutment against the guide 6.
  • the template is provided with gripping means such as handles fixed by any known means.
  • the machining guide is constituted by a rolling member such as a ball bearing, coaxial and fixed to the shaft of the tool and by a ring cooperating with the template fixed relative to the ring outside of the bearing by a positioning member secured to the outer ring.
  • the guide 6 comprises a ball bearing 6B mounted in a known manner on the shaft 19, an intermediate member or a ring 30 integral with the outer ring of the bearing and a removable ring 31 fitted and positioned on the member 30 the ring 31 being interchangeable with at least one other ring of different outside diameter.
  • This ring 31 is intended to cooperate with the face 7A of the template 7.
  • the ring 30 is provided with a series of radial holes receiving respectively blocking devices of the ring 31.
  • These members are constituted as known by an elastic member such as a spring acting on a ball which is engaged when the ring 31 is placed in an annular groove 32 formed in the thickness of said ring 31 and open towards its axis.
  • the machining guide 6 has a series of steps or shoulders 6A of different diameters intended to cooperate with the face 7A of the template, so that the user of the machine can choose the cutting depth of the tool without having to dismantle said guide 6.
  • this machining guide is rotatably mounted and fixed in translation on a sleeve 33 coaxial with the shaft 19 on which it is mounted.
  • rolling members 34 are arranged between the sleeve and the guide in a manner known to those skilled in the art.
  • the sleeve 33 is provided with a longitudinal oblong orifice parallel to the axis of the shaft 19.
  • a rotational stop means preferably constituted by a screw 36 engaged in a threaded orifice formed in the shaft 19.
  • the sleeve 33 cooperates with a fork lever 33A articulated to the frame 1 and is provided with a stop means in translation relative to the shaft 19.
  • this means consists of a ball engaged in a radial orifice of the sleeve and pushed towards the rotary shaft by an elastic member.
  • the ball will engage in an annular groove formed in the rotary shaft, the said rotary shaft having, as illustrated, several superimposed grooves.
  • the stepped shape of the guide 6 is produced by stacking rings of different outside diameters.
  • the bearings 22 in which the shaft 21 carrying the roller 17 revolves are mounted on a vertical wall 37 articulated around a horizontal and transverse shaft 38 to the general direction of the belt 4.
  • the shaft 38 is integral with a support member 39 of the belt tensioning device.
  • This member 39 is provided with an adjustable stop 40 opposing the angular movement of the vertical wall 37 around the axis 38 in order to maintain the parallelism of the shaft 22 relative to the shaft 19.
  • the member 39 is integral with a vertical shaft 41 hinged to the frame 1.
  • This shaft is provided with an arm 42 cooperating with a member for tensioning the strip.
  • this member is constituted by a lever 43 provided with a removable counterweight 44.
  • This lever is articulated to the frame and its point of articulation is provided with a rod 45 perpendicular to the arm 42 on which it is supported so that the shaft 17 is capable of a rotational movement around the shaft 41 suitable to stretch the tape.
  • the machine as described is more particularly intended for machining on wooden parts or any other material, complex profiles without the use of qualified personnel.

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

Claims (10)

1. Maschine mit umlaufendem Werkzeug für die Nachbildung oder Bearbeitung und im besonderem für die Umrißbearbeitung von mindestens einem flach auf einem Bezugsformstück (7) befestigtem Werkstück (8), wobei die genannte Maschine aus einem Maschinengestell (1) besteht, auf welchem ein Arbeitstisch (2) mit mindestens einer waagrecht liegenden Arbeitsfläche (3) befestigt ist, in deren Umgebung und merklich oberhalb einer zylinderförmigen Führungsvorrichtung (6) mindestens ein an einer senkrechten drehbaren Welle (19) befestigtes Werkzeug (4) liegt oder zu liegen kommt, wobei die Führungsvorrichtung lösbar an der selben Achse und oberhalb der Arbeitsebene derart gelagert ist, daß sie mit dem Rand des Bezugsformstücks (7) zusammenarbeiten kann, wobei Bezugsformstück und Werkstück gemeinsam lösbar auf der Arbeitsfläche liegen, dadurch gekennzeichnet, daß die zylinderförmige Führung (6) geeignete Vorrichtungen enthält, welche das Bezugsformstück und das zu bearbeitende Werkstück gemeinsam in verschiedenen Abständen vom Werkzeug (4) festhalten, wobei, ohne daß das Bezugsformstück (7) hinsichtlich des Werkstücks (8) verschoben wird, der Umriß des bezeichneten Werkstücks (8) mehrmalig zu verschiedenen Tiefen und gemäß der Umrißform des genannten Bezugsformstücks (7) bearbeitet werden kann.
2. Maschine mit umlaufendem Werkzeug gemäß Patentanspruch 1, dadurch gekennzeichnet, daß die genannte Führungsvorrichtung (6) mindestens einen zylinderförmigen äußeren Führungsring (29) oder (31) aufweist, der mit mindestens einem anderen zylinderförmigen Ring von verschiedenem Außendurchmesser auswechselbar ist, wobei ihre aufeinanderfolgende Benutzung in bezug auf die senkrechte Welle (19) des gleichen Werkzeuges (4) oder auf die Welle eines Werkzeuges, dessen Durchmesser demjenigen des ersten Werkzeuges gleich ist, einen mehrmaligen Bearbeitungsgang auszuführen ermöglicht, ohne daß dabei das Werkstück (8) und das Bezugsformstück (7) abmontiert werden müssen.
3. Maschine mit umlaufendem Werkzeug gemäß Patentansprüche 1 und 2, dadurch gekennzeichnet, daß die Führungsvorrichtung (6) aus einem mit Walzen oder dergl. ausgeführten Lager, von der Art Kugellager, besteht, dessen innerer Ring (28) an der drehbaren Welle (19) des Werkzeugs befestigt ist und dessen lösbarer und mit mindestens einem anderen Außenring von ungleichem Außendurchmesser austauschbaren Außenring (29) derart gelagert ist, daß die vom größeren Durchmesser ausgehend bis zum kleineren Durchmesser aufeinanderfolgende Benutzung einen mehrmaligen Bearbeitungsgang ermöglicht, wobei die gegebenen Umrißformen des Bezugsformstücks befolgt werden.
4. Maschine mit umlaufendem Werkzeug gemäß Patentanspruch 1, dadurch gekennzeichnet, daß die Führungsvorrichtung (6) eine Reihe von Stufen (6A) oder Schulteransätzen mit unterschiedlichen Durchmessern aufweist, welche einzeln mit der Bezugskante des Bezugsformstücks (7) zusammenarbeiten und dadurch, daß die genannte Führungsvorrichtung (6) mit einer Vorrichtung (33) zusammenarbeitet, welche, in bezug auf die Werkzeugwelle (19), dessen Translations-Verschiebbarkeit und dessen Translations-Festlegen gegenüber der genannten Welle sicherstellt, womit die auf die Bezugskante des Bezugsformstücks (7) bezogene gewählte Stufe (6A) genau positioniert wird.
5. Maschine mit umlaufendem Werkzeug gemäß Patentansprüche 1 und 4, dadurch gekennzeichnet, daß die Vorrichtung eine Hülse (33) aufweist, auf welcher die Führungsvorrichtung (6) drehbar gelagert ist und welche auf die Welle (19) des Werkzeugs derart aufgeschrumpft ist, daß sie frei translations-verschiebbar aber drehungsfest in bezug auf die genannte Welle gelagert liegt, wobei sie mit den Steuervorrichtungen (33A) in Translation mit der genannten Welle und mit den Vorrichtungen zusammenarbeitet, die die Positionierung der genannten Hülse gewährleisten.
6. Maschine mit umlaufendem Werkzeug gemäß Patentansprüche 1, 4 und 5, dadurch gekennzeichnet, daß die stufenartige Form der Führungsvorrichtung (6) durch die Aufstapelung von Ringen von verschiedenem Außendurchmesser dargestellt wird.
7. Maschine mit umlaufendem Werkzeug gemäß Patentanspruch 1, dadurch gekennzeichnet, daß das genannte Bezugsformstück (7) mit einer Abstufung versehen ist, so daß seine Bezugskante vom unteren Ende des drehbaren Werkzeuges (4) freigelegt werden kann.
8. Maschine mit umlaufendem Werkzeug gemäß Anspruch 1, dadurch gekennzeichnet, daß der mehrkantige kreisförmige oder krummlinige Umriß der Arbeitsebene (3) des Tisches (2) mindestens eine Anfügungsseite (14) aufweist, welche dem Tischprofil entspricht und senkrecht oder quer zur Zustellbewegung des Bezugsformstücks (7) und des Werkstücks (8) zum drehbaren Werkzeug (4) gerichtet steht.
9. Maschine mit umlaufendem Werkzeug gemäß Patentansprüche 1 und 8, dadurch gekennzeichnet, daß der Umriß der Arbeitsebene (3) eine dreieckige Form aufweist und mit zwei zur Zustellrichtung des Bezugsformstücks (7) und des Werkstücks (8) quergerichteten Seiten (14) mit dem Tischprofil (2) so verbunden ist, daß der Benutzer, unabhängig von seiner Stellung in bezug auf den genannten Umriß, frei und mühelos zu dem einen oder dem anderen der Werkzeuge (4) Zugang hat.
10. Maschine mit umlaufendem Werkzeug gemäß Patentanspruch 1 und jedem der vorhergehenden Patentansprüche, dadurch gekennzeichnet, daß sie auf der Arbeitsebene zwei drehbare Werkzeuge (4) aufweist, welche aus zwei endlosen im Umlauf betriebenen Bändern besteht.
EP81400336A 1980-03-06 1981-03-04 Mit einem drehenden Werkzeug versehene Maschine für Reproduktions- oder Polierarbeiten Expired EP0035939B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8005112 1980-03-06
FR8005112A FR2477455A1 (fr) 1980-03-06 1980-03-06 Machine a outil rotatif pour les travaux de reproduction ou de finition

Publications (2)

Publication Number Publication Date
EP0035939A1 EP0035939A1 (de) 1981-09-16
EP0035939B1 true EP0035939B1 (de) 1983-05-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400336A Expired EP0035939B1 (de) 1980-03-06 1981-03-04 Mit einem drehenden Werkzeug versehene Maschine für Reproduktions- oder Polierarbeiten

Country Status (3)

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EP (1) EP0035939B1 (de)
DE (1) DE3160339D1 (de)
FR (1) FR2477455A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210069853A1 (en) * 2019-09-11 2021-03-11 Eriksson Teknik Ab Automatic blade holder
US11878386B2 (en) 2019-09-11 2024-01-23 Prosharp Inc. Automatic blade holder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0104291A1 (de) * 1982-09-29 1984-04-04 Société CO.ME.CA. S.A. Maschine mit drehendem Werkzeug für Reproduktions- und Feinstbearbeitungen, hauptsächlich für die Bearbeitung eines auf eine Schablone montierten Werkzeuges
GB2255922B (en) * 1991-05-24 1994-07-20 Stephen Jack Wylde Lens surface former and polishing tool

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE419717A (de) *
GB939438A (de) * 1900-01-01
US1905190A (en) * 1928-11-24 1933-04-25 Lisa Silvester Marble working machine
FR1387314A (fr) * 1963-12-20 1965-01-29 Machine à rectifier suivant contour d'un calibre
GB984926A (en) * 1963-02-21 1965-03-03 Luciano Cuoghi Improvements in and relating to edge-grinding machines
FR2185283A5 (de) * 1972-05-15 1973-12-28 Toyoda Machine Works Ltd
FR2229501A1 (de) * 1973-05-17 1974-12-13 Petitjean Marcel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE817192A (fr) * 1974-07-02 1974-11-04 Machine automatique a travailler le verre pour le faconnage de coins ronds.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE419717A (de) *
GB939438A (de) * 1900-01-01
US1905190A (en) * 1928-11-24 1933-04-25 Lisa Silvester Marble working machine
GB984926A (en) * 1963-02-21 1965-03-03 Luciano Cuoghi Improvements in and relating to edge-grinding machines
FR1387314A (fr) * 1963-12-20 1965-01-29 Machine à rectifier suivant contour d'un calibre
FR2185283A5 (de) * 1972-05-15 1973-12-28 Toyoda Machine Works Ltd
FR2229501A1 (de) * 1973-05-17 1974-12-13 Petitjean Marcel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210069853A1 (en) * 2019-09-11 2021-03-11 Eriksson Teknik Ab Automatic blade holder
US11806826B2 (en) * 2019-09-11 2023-11-07 Prosharp Inc. Automatic blade holder
US11878386B2 (en) 2019-09-11 2024-01-23 Prosharp Inc. Automatic blade holder

Also Published As

Publication number Publication date
DE3160339D1 (en) 1983-07-07
EP0035939A1 (de) 1981-09-16
FR2477455B1 (de) 1983-09-30
FR2477455A1 (fr) 1981-09-11

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