EP0703039A1 - Appareil de surfaçage pour les bords d'une pierre tombale - Google Patents

Appareil de surfaçage pour les bords d'une pierre tombale Download PDF

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Publication number
EP0703039A1
EP0703039A1 EP95114891A EP95114891A EP0703039A1 EP 0703039 A1 EP0703039 A1 EP 0703039A1 EP 95114891 A EP95114891 A EP 95114891A EP 95114891 A EP95114891 A EP 95114891A EP 0703039 A1 EP0703039 A1 EP 0703039A1
Authority
EP
European Patent Office
Prior art keywords
grinding
grinding wheel
support arm
headstock
machine according
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
EP95114891A
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German (de)
English (en)
Other versions
EP0703039B1 (fr
Inventor
Wolfgang Mayer
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
Priority claimed from DE19944433715 external-priority patent/DE4433715C1/de
Priority claimed from DE19529414A external-priority patent/DE19529414A1/de
Application filed by Individual filed Critical Individual
Publication of EP0703039A1 publication Critical patent/EP0703039A1/fr
Application granted granted Critical
Publication of EP0703039B1 publication Critical patent/EP0703039B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain

Definitions

  • the invention relates to a machine for surface processing of the edges of a gravestone or the like plate-shaped workpiece.
  • a machine for surface treatment of the edges of a gravestone is already known from EP 0 185 560 A2. Thereafter, two slides arranged one above the other and movable in mutually perpendicular directions are provided.
  • the lower carriage is guided on the floor in a tangential direction to the axis of rotation of the turntable.
  • the upper slide which is displaceable towards the axis of rotation of the turntable, has a button which interacts with a template which is attached to the turntable.
  • On the upper slide is a turret to the turntable arranged parallel axis of rotation, from the circumference of which several drum-shaped, optionally usable grinding tools protrude in a star shape.
  • the grinding drums polish the edges of the tombstone with their outer surface. In order to adapt the position of the tombstone to the template, it can be moved on a roller bearing that can be extended from the turntable. In order to switch off the grinding drum when it is machining an edge which has an indentation which has a larger diameter, electrical switches are provided on both sides of the grinding drum.
  • a template In the known machine, a template must first be produced for each tombstone that has a different shape. Also, with the known machine only curvatures can be machined that have a diameter that is at least as large as the diameter of the grinding drum, that is, corners at all. Furthermore, the tombstone must be precisely aligned by moving it on the roller bearing according to the template. Furthermore, there is greater wear in the central axial region of the grinding drums than at their ends.
  • the object of the invention is to provide a machine for the surface processing of the edges of a tombstone or similar plate-shaped workpiece, with which even complex contours can be reworked quickly and reliably.
  • a rotary table 4 rotatable about a vertical main axis 3, on which the plate-shaped workpiece 5, ie z. B. a gravestone, whose edge 6 is to be reworked.
  • two clamps 7 are provided, for example, the workpiece resting with a straight cut on the rods 8 of the clamps 7, which extend vertically upwards from the table 4.
  • the support arm 9 On the support frame 2 there is also a support arm 9 which is displaceable laterally in one direction of the plate plane, namely in the x direction, that is to say on the other side of the base frame 1.
  • the support arm 9 has a turntable 4 encompassing end section 10 on which a grinding wheel carrier or grinding headstock 11 is fastened rotatably about a vertical axis 12.
  • a grinding wheel 13 is arranged, the axis of rotation 14 of which is oriented substantially perpendicularly to the region of the edge 6 of the workpiece 5 on which the grinding wheel 13 is just engaging.
  • the grinding wheel 13 is releasably attached to a plate 16 which is set in rotation by a motor, not shown, which is accommodated at the end 10 of the support arm in the casing 18 of the support arm 9.
  • a motor not shown
  • the grinding wheel 13 is provided on its rear side with a ferromagnetic layer 61 which adheres to the magnetically designed plate-shaped receiving head 59 which is arranged on the grinding spindle 58 (cf. also FIG. 7).
  • the receiving head 59 is rotatably mounted on the piston 17 of a pneumatic pressure cylinder 19.
  • the grinding wheel 13 can thus be loaded with a certain pressure in accordance with the arrow x1 towards the edge 6.
  • the grinding headstock 11 is designed to extend vertically upwards according to the arrow 20 on the support arm end 10, that is, for. B. telescopic, according to FIG. 2 between the lower and the upper end position I or II.
  • a drive not shown in the panel 18, the grinding headstock 11 is moved up and down between the two end positions, so that the edge 6 of the workpiece 5 attacking grinding wheel 13 constantly oscillates across the edge 6.
  • the grinding wheel 13 has a significantly smaller diameter than the width of the edge 6 of the workpiece 5.
  • the distance by which the grinding wheel 13 can be extended relative to the pneumatic cylinder 19 and thus the grinding headstock 11 is predetermined and is measured with a z.
  • the axis of rotation 12 of the grinding headstock 11 lies in the grinding plane of the grinding wheel 13.
  • the grinding headstock 11 is also provided with a water supply (not shown) to the point of the edge 6 of the workpiece 5 to be processed with the grinding wheel 13.
  • the grinding headstock 11 With a cable bundle 22, the grinding headstock 11 is supplied with energy from the support frame 2, that is to say with electrical cables for driving the grinding headstock 11 for moving in and out according to the arrow 20 between the two end positions I and II and for rotating about the axis 12 and for the motor for driving the grinding wheel 13 and the compressed air hose for the pneumatic cylinder 19.
  • the motor is designated by 23 in FIG. B. on a pinion and a rack 35 (Fig. 4) on the support arm 2 to move it in the x direction.
  • the support arm 9 is also pivotally mounted about the axis of rotation 3 of the turntable 4 on the support frame 2.
  • the turntable 4 is supported on the support frame 2 via a roller bearing 30 and a ring 31.
  • the turntable is driven by a motor 32 and a gear 33.
  • the guide 34 for the movement of the support arm 9 in the x direction is fastened to the ring 31.
  • the rotation of the support arm 9 about the axis 3 is carried out by the motor 32 via the turntable 4 by means of the coupling 38, which drives the shaft 40 via a belt 39, the spur gear 37 engaging in the ring gear on the ring 31.
  • the support arm 9 must be pivoted about the workpiece 5 according to the circle 26. This requires a considerable amount of space.
  • the extended support arm 9 can be pivoted between the two end positions a and b shown in FIG. 1 within a predetermined pivoting angle in the direction of arrow 25, so that it is always located within the base frame 1 in its central region.
  • the turntable 4 is rotated in the opposite direction together with the support arm 9 according to the arrow 27, so that the support arm 9 again assumes the end position a.
  • a locking device between the support arm 9 and the turntable 4 is provided, which is actuated when the table 4 rotates according to the arrow 27. 4, the locking device is formed by a coupling 38 provided on the rotary table 4, which is connected via a belt 39 to the shaft 40 for pivoting the support arm 9.
  • the grinding wheel 13 is controlled in accordance with the course of the edge 6 of the workpiece 5 by moving the support arm 9 in the x direction and rotating in the direction of the arrow 25, and the rotation of the grinding headstock 11 about the axis of rotation 12 is carried out by an electronic device in the control cabinet 42 is housed.
  • each-in can be carried out in order to detect the contour of the stone 5.
  • the grinding wheel 13 is replaced by a touch wheel, whereupon the operator detects the handwheel 43, which is rotatably attached to the grinding headstock 11 so as to be rotatable about the axis 12.
  • the operator then moves the contour of the stone 5 by pushing and pulling the support arm 9 with the handwheel 43 in the x direction or the direction of the arrow 25 and rotating the grinding headstock 11 about the axis 12.
  • the course of the contour is thereby entered into a memory, the data of which are fed to the electronic control.
  • the axis of rotation 3 of the turntable 4 forms the reference point for the electronic control.
  • the operator's grinding experience can also be taken into account. As shown in FIG. 5, for example an inclined position of the grinding wheel 13 with a bent edge in section 44 of the edge 6 of the workpiece 5 can be advantageous. It may also be expedient if the grinding wheel 13 is moved somewhat beyond the edge to the adjoining section 46, for example when machining the gentle arc section 45, as shown.
  • a switch on the handwheel 43 not shown, allows the operator to enter the memory, for example, up to which point on the section 45 the grinding wheel 13 is to be moved. Then, after a loop-shaped empty run, the probe is placed on section 46 and the memory with the mentioned switch entered a corresponding command. As a result, the end points of the individual sections 44, 45, 46 of the edge 6 of the workpiece 5 are precisely fixed in the memory.
  • the grinding wheel 13 can be moved with its edge slightly beyond the corner, as shown.
  • the measuring wheel has the same thickness as the grinding wheel 13. However, it can also have a slightly larger or smaller diameter.
  • the machine according to the invention has an automatic device for changing the grinding wheel.
  • This device consists of a drum magazine 47 which is arranged on the base frame 1 so as to be rotatable about a vertical axis 49.
  • the magazine 47 has a support structure 50 on the circumference, on which pocket-shaped receptacles 51 for the grinding wheels 13 are arranged.
  • a grinding wheel 13 is inserted into the receptacle 51.
  • the receptacle 51 is open at its top, while it is bounded at the front by a fork-shaped stop 52, at the bottom by a base 53 and laterally by the two side walls 54, 55 and its rear wall is formed by the carrier 50.
  • the grinding wheel 13 can also be held only by the bottom 53 or only by the side walls 54 and 55.
  • the grinding wheel can therefore be inserted into the receptacle 51 from above according to the arrow 57.
  • the recording head 59, the grinding spindle 58 rotatably mounted in the grinding headstock 11 is provided with a permanent magnet, not shown (Fig. 1, 3 and 7).
  • the receiving head 59 is provided with a projection 60, for example a hexagon (FIG. 7).
  • the grinding wheel 13 is provided on the side facing the stop 52 with the wheel 61 made of ferromagnetic material, that is to say, for example, a steel wheel which is fastened to the carrier wheel 64 with the grinding lining 62.
  • a coaxial inner recess 63 for example a hexagon socket, is provided in the disk 61, into which the projection 60 on the receiving head 59 engages.
  • the ferromagnetic disk 61 is received by the recess 65 of the stop 52.
  • straight flanks 66 are provided on opposite sides of the wheel 61 which match the straight flanks 65 of the U-shaped recess are trained.
  • the receptacle 51 is e.g. provided as a rubber wheel holder 67 for the grinding wheel 13, which presses the grinding wheel 13 against the stop 52 with a spring 68.
  • the rubber wheel 67 engages in the recess 63 in the grinding wheel 13, which is provided for the engagement of the projection 60 on the receiving head.
  • the rubber wheel 67 is rotatably mounted on a rod 69, which is guided in the carrier 50 so that it can move.
  • the spring 68 which is supported on the one hand by a nut on the rod 69 and on the other hand on the support 50, the wheel 67 is pressed against the grinding wheel 13.
  • another tensioning device for the wheel 67 can also be provided, e.g. an o-ring.
  • the grinding headstock 11 according to FIGS. 1 and 7 is rotated on the support arm 9 such that the receiving head 59 on the grinding spindle 58 faces the magazine 47.
  • the magazine 47 is then moved along the guideway 48 in the direction of arrow 49 to the grinding headstock 11.
  • the grinding headstock 11 By moving the grinding headstock 11 with respect to the support arm 9 (FIG. 1), the projection 60 on the receiving head 59 and the inner recess 63 in the grinding wheel 13 are aligned with one another (FIG. 7), the grinding spindle 58 engaging the hexagon 60 in a corresponding angular position is located on the receiving head 59 in the hexagon socket 63 of the grinding wheel 13.
  • the magazine 47 according to FIG. 1 or the receptacle 51 according to FIG. 7 is moved up to the receiving head 59, so that the projection 60 on the receiving head 59 engages in the inner recess 63 in the grinding wheel 13, the receiving head 59 and the grinding wheel become 13 connected to one another by the magnetic force between the permanent magnet in the receiving head 59 and the steel disk 61.
  • the grinding headstock 11 and thus the receiving head 59 are now moved upward with respect to the support arm 9 against the insertion direction 57, as a result of which the grinding wheel 13 is pulled out of the receptacle 51 in order to then adhere magnetically to the receiving head 59.
  • the grinding spindle 58 and the pocket 51 are moved apart, and the projection 60 on the receiving head 59 and the inner recess 63 in the grinding wheel 13 are thereby disengaged.
  • the drum magazine 47 is then rotated until the holder 51 with the desired grinding wheel 13 is arranged in front of the holder head 59.
  • the receptacle 51 with the desired grinding wheel 13 is moved towards the grinding spindle 58, so that the projection 60 engages in the recess 63 of the new grinding wheel 13.
  • the new grinding wheel 13 can be pulled up out of its receptacle 51, as described above.
  • the support arm 9 in such a way that it can be moved to the magazine 47 with the grinding headstock 11.
  • the workpiece can also be arranged upright.
  • the pressure of the grinding wheel against the edge to be machined can also be brought about in that the grinding headstock is arranged on the support arm so as to be displaceable on the edge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
EP95114891A 1994-09-21 1995-09-21 Appareil de surfaçage pour les bords d'une pierre tombale Expired - Lifetime EP0703039B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4433715 1994-09-21
DE19944433715 DE4433715C1 (de) 1994-09-21 1994-09-21 Maschine zur Oberflächenbearbeitung der Kanten eines Grabsteins
DE19529414A DE19529414A1 (de) 1994-09-21 1995-08-10 Vorrichtung zum Wechsel scheibenförmiger Werkzeuge
DE19529414 1995-08-10

Publications (2)

Publication Number Publication Date
EP0703039A1 true EP0703039A1 (fr) 1996-03-27
EP0703039B1 EP0703039B1 (fr) 1998-08-12

Family

ID=25940336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95114891A Expired - Lifetime EP0703039B1 (fr) 1994-09-21 1995-09-21 Appareil de surfaçage pour les bords d'une pierre tombale

Country Status (2)

Country Link
EP (1) EP0703039B1 (fr)
AT (1) ATE169542T1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2070521A5 (fr) * 1969-12-08 1971-09-10 Luchaire Sa
EP0033922A2 (fr) * 1980-02-08 1981-08-19 OFFICINA MECCANICA ZANETTI ARISTODEMO & C. S.a.S. Machine pour meuler les bords de pièces en forme de plaques, en particulier des plaques de verre ou de pierre
FR2569599A1 (fr) * 1984-09-06 1986-03-07 Nippon Sheet Glass Co Ltd Appareil de polissage de tranches d'objets plats, notamment de verre
EP0185560A2 (fr) 1984-10-09 1986-06-25 Cosimo Mogavero Machine de fraisage et polissage d'un chant d'une pièce en matériau dur
EP0499371A1 (fr) * 1991-01-26 1992-08-19 Pilkington Plc Fabrication de vitrages laminées

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2070521A5 (fr) * 1969-12-08 1971-09-10 Luchaire Sa
EP0033922A2 (fr) * 1980-02-08 1981-08-19 OFFICINA MECCANICA ZANETTI ARISTODEMO & C. S.a.S. Machine pour meuler les bords de pièces en forme de plaques, en particulier des plaques de verre ou de pierre
FR2569599A1 (fr) * 1984-09-06 1986-03-07 Nippon Sheet Glass Co Ltd Appareil de polissage de tranches d'objets plats, notamment de verre
EP0185560A2 (fr) 1984-10-09 1986-06-25 Cosimo Mogavero Machine de fraisage et polissage d'un chant d'une pièce en matériau dur
EP0499371A1 (fr) * 1991-01-26 1992-08-19 Pilkington Plc Fabrication de vitrages laminées

Also Published As

Publication number Publication date
ATE169542T1 (de) 1998-08-15
EP0703039B1 (fr) 1998-08-12

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