EP0035939A1 - 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
EP0035939A1
EP0035939A1 EP81400336A EP81400336A EP0035939A1 EP 0035939 A1 EP0035939 A1 EP 0035939A1 EP 81400336 A EP81400336 A EP 81400336A EP 81400336 A EP81400336 A EP 81400336A EP 0035939 A1 EP0035939 A1 EP 0035939A1
Authority
EP
European Patent Office
Prior art keywords
template
shaft
tool
guide
rotary 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.)
Granted
Application number
EP81400336A
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English (en)
French (fr)
Other versions
EP0035939B1 (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 the machining of small series of parts in a precise manner without any adjustment of the position of the part to be machined relative to the tool and without particular adjustment of the position of the part 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 area of the work surface 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.12) 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.12) 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 metal or other table 2 is in the form of a planar 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 surface is such that whatever the position of the user of the machine with respect to said contour, the latter can easily access the rotary tool.
  • the shape of the contour of the work plan is such that it also allows the template to be fully arranged on the work plan, 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 the other of its longitudinal sides 13, said base being wider than the table.
  • the work surface has two short sides 14 connecting the sides 15 of the triangular shape of the work surface 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 with them. An obtuse angle.
  • the work surface as described is particularly suitable for receiving two rotary tools located respectively on either side of the longitudinal axis of the table 2.
  • the two rotary abrasive tools are of different grain size to achieve all 'first a semi-finish 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 A) 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 belt 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.
  • These rollers are releasably wedged by any known means on vertical rotating shafts - and s' each engage in an opening 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 belt.
  • the belt 24 is tensioned by a tensioner 27 known per se, shown schematically. 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 the orifice of the table into which the shaft 19 engages.
  • the machining guide 6 against the upper face of the collar 27 and under the lower end of the roller 16 is mounted the machining guide 6. Against this guide during machining abuts the reference face 7A of the template 7.
  • the profile of the face 7A is curvilinear and has a succession of hollows and bumps which must be reproduced on the part 8 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 to reproduce 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 condition must be fulfilled regardless of the position of the part 8 during machining and its size relative to the longitudinal axis of the machine.
  • 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 uu cylindrical coaxial with the shaft 19 and free in rotation relative to the latter against which comes abut 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 outer radius of the ring 29 and the radius of the rotary tool conditions the value of the maximum penetration of said tool in the workpiece 8.
  • To adjust the depth of the ring 29 of the rolling member constituting the guide 6 is preferably removable so that the user according to the needs of the machining work can replace it with a ring of larger or smaller diameter.
  • 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 side 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 exterior of of the bearing by a positioning member secured to the outer ring.
  • a rolling member such as a ball bearing
  • the guide 6 comprises a ball bearing 6B mounted in a known manner on the shaft 19, an intermediate member or a ring 30 secured to the outer ring of the bearing and a removable ring 31 fitted and positioned on the organ 30.
  • 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.
  • organs 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 pass 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.
  • the rolling members 34 are disposed between the sleeve and the guide way known to those skilled in the art t.
  • 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.
  • this means consists of a ball engaged in a
  • the ball will engage in an annular groove formed in the rotary shaft, the said rotary shaft having, as illustrated, several superimposed grooves.
  • the step shape of the guide 6 is produced by stacking rings of different external 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 has 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
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
FR8005112A FR2477455A1 (fr) 1980-03-06 1980-03-06 Machine a outil rotatif pour les travaux de reproduction ou de finition
FR8005112 1980-03-06

Publications (2)

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

Family

ID=9239410

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)

Country Link
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
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
US5307592A (en) * 1991-05-24 1994-05-03 Wylde Stephen J Lens surface former and polishing tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (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.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB939438A (de) * 1900-01-01
BE419717A (de) *
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
JPS5143633B2 (de) * 1972-05-15 1976-11-24
FR2229501B1 (de) * 1973-05-17 1980-06-13 Petitjean Marcel

Patent Citations (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.

Cited By (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
US5307592A (en) * 1991-05-24 1994-05-03 Wylde Stephen J Lens surface former and polishing tool

Also Published As

Publication number Publication date
EP0035939B1 (de) 1983-05-25
DE3160339D1 (en) 1983-07-07
FR2477455A1 (fr) 1981-09-11
FR2477455B1 (de) 1983-09-30

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