EP1719586B1 - Dispositif presseur - Google Patents

Dispositif presseur Download PDF

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Publication number
EP1719586B1
EP1719586B1 EP06112850A EP06112850A EP1719586B1 EP 1719586 B1 EP1719586 B1 EP 1719586B1 EP 06112850 A EP06112850 A EP 06112850A EP 06112850 A EP06112850 A EP 06112850A EP 1719586 B1 EP1719586 B1 EP 1719586B1
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EP
European Patent Office
Prior art keywords
solenoid valve
pressure
chamber
designed
pneumatic
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EP06112850A
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German (de)
English (en)
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EP1719586A1 (fr
Inventor
Fabio Maioli
Adriano Ferrari
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SCM Group SpA
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SCM Group SpA
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Publication of EP1719586A1 publication Critical patent/EP1719586A1/fr
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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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • B24B21/04—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces
    • B24B21/06—Machines or devices using grinding or polishing belts; Accessories therefor for grinding plane surfaces involving members with limited contact area pressing the belt against the work, e.g. shoes sweeping across the whole area to be ground
    • B24B21/08—Pressure shoes; Pressure members, e.g. backing belts
    • 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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/08—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation involving liquid or pneumatic means

Definitions

  • This invention relates to a presser device designed for use on machine tools, in particular machines for sanding wood or similar materials; as per the preamble of claim 1.
  • An example of such device is disclosed by EP 1 070 567 A .
  • Prior art sanding machines for example wide belt sanders, comprise a frame that mounts a conveyor belt extending in a longitudinal direction and designed to convey a workpiece to be sanded.
  • the frame mounts a plurality of rollers with parallel axes positioned above the conveyor belt and designed to tension and drive an endless abrasive belt trained around the rollers themselves.
  • the abrasive belt has a sanding unit comprising a presser device designed to exert a suitable pressure on a part of the sanding belt in the direction of the conveyor belt in such a way as to vary the sanding pressure on the workpiece.
  • the presser device is positioned transversally to the direction of feed of the conveyor belt and is divided into a plurality of adjacent shoes.
  • the shoes are independent of each other, are each associated with an actuator controlled by a drive device and each is designed to press on a respective portion of the abrasive belt.
  • the shoe drive devices are controlled by a scanning barrier located above the level of the conveyor belt and upstream of the abrasive belt.
  • the workpiece When the workpiece is positioned on the conveyor belt, it moves under the scanning barrier which scans it and detects its size.
  • the scanning barrier controls the actuator drive devices in such a way that each actuator exerts more or less pressure according to whether the portion to be sanded is on the inner side of the workpiece or near an edge.
  • presser devices which exert two different pressure levels and a counterpressure on the actuator and on the respective shoe.
  • Each pressure level enables the shoe to push down on the abrasive belt with a different force in order to achieve a desired sanding effect.
  • the counterpressure on the other hand, enables the actuator to quickly lift the shoe, thus disengaging it from the abrasive belt.
  • EP 1 070 567 An example of a pressure devices can be seen in EP 1 070 567 which describes pressure elements that are distributed along the clamping-bar and are separately controlled by adjusting the piston belonging to a cylinder-piston unit operated by a pressure medium.
  • the cylinder-piston units are connected by at least one control valve to at least one first excess pressure pipe or to a vacuum pipe.
  • Each cylinder-piston unit has a cylinder in which the piston moves and into which a pressure medium pipe leads.
  • the shoe may be pushed down too hard on the edge surface of the workpiece, causing it to splinter and spoiling the overall quality of the sanded surface.
  • One aim of this invention is to improve the presser devices applicable to machine tools such as sanding machines.
  • Another aim of the invention is to provide a presser device that enables the edge of a workpiece to be sanded without being damaged.
  • Yet another aim of the invention is to reduce the number of incorrectly sanded workpieces that have to be rejected.
  • This invention provides a presser device in accordance with claim 1.
  • Sanding precision can be considerably improved by suitably adjusting the pressure to prevent splintering of workpiece edges, thus producing workpieces with a better surface quality.
  • Figure 1 shows the actuating section of a sanding pad, comprising a plurality of presser devices 1 positioned side by side.
  • This actuating section is applicable to a wide belt sander designed to sand wood or similar materials.
  • These sanding machines comprise a frame that mounts a conveyor belt 5 extending and moving along a substantially horizontal axis X and designed to convey a workpiece 2 along said axis X ( Figure 4 ).
  • the frame also mounts a plurality of rollers having parallel axes and which, in use, are positioned at a level above and transversally to the conveyor belt 5 ( Figure 4 ) and which tension and drive an endless abrasive belt (not illustrated) trained around the rollers themselves.
  • the abrasive belt runs in the direction of the conveyor axis X and is pressed against the workpiece 2 by a plurality of presser devices 1.
  • Each presser 1 comprises pneumatic means 3 equipped with an actuator 4 that is removably coupled, for example by a screw connection, with a shoe (not illustrated) having the general shape of a parallelepiped extending along the axis X and designed to exert a suitable pressure on a respective portion of the abrasive belt in the direction of the conveyor in such a way as to enable the workpiece 2 to be sanded.
  • the pneumatic means 3, and hence the actuators 4 of each presser device 1 are independent of each other and designed to move each respective shoe along a substantially vertical axis Z substantially perpendicular to the axis X.
  • the shoes which vary in number according to the width of the abrasive belt, are also positioned side by side, in a row like the keys on a piano keyboard, transversally to the axis X.
  • the presser devices 1 are mounted on a crosspiece 6, consisting for example of an aluminium extrusion and positioned transversally to the axis X above the abrasive belt.
  • the crosspiece 6 is inserted between the abrasive belt tensioning rollers and extends in a direction parallel to them according to a customary arrangement of these machines.
  • the crosspiece 6 also comprises a counterpressure chamber 9 and a first pressure chamber 10, independent of each other and extending parallel to each other for the full length of the crosspiece 6.
  • the first pressure chamber 10 is larger in volume than the counterpressure chamber 9 and is located above the latter.
  • the crosspiece 6, viewed in a vertical cross section, is substantially square shaped and has a plurality of sealed housings 7 extending along the axis Z.
  • Each housing 7 extends transversally to the crosspiece 6 and through the centre of the latter.
  • Each housing 7 is designed to contain a liner 8 of the pneumatic means 3, having the general form of a hollow cylinder and extending along the axis Z.
  • the liner 8 has three different inside diameters: a first inside diameter 11 in a first section 12; a second inside diameter 13 in a second section 14; and a third inside diameter 15 in a third section 16, opposite the first section 12, the second section 14 being located between the first section 12 and the third section 16.
  • the first inside diameter 11 is smaller than the second inside diameter 13 which is in turn smaller than the third inside diameter 15.
  • Each liner 8 is designed to receive the respective actuator 4 in such a way as to guarantee the dimensional precision required and to increase the smoothness of movement along the axis Z of the actuator 4.
  • Each actuator 4 is shaped substantially like a cylinder extending along the axis Z and has three different outside diameters: a first outside diameter 17 in a first portion 18 of it; a second outside diameter 19 in a second portion 20 of it; and a third outside diameter 21 in a third portion 22 of it.
  • the first outside diameter 17 is smaller than the second outside diameter 19 which is in turn smaller than the third outside diameter 21.
  • the liner 8 also has a substantially horizontal aperture 25 through which the first annular chamber 23 communicates with the counterpressure chamber 9.
  • the crosspiece 6 also has an upper surface 27 surmounted by a guard 26.
  • the guard 26 and the surface 27 define a compartment 28 for accommodating means 29 for driving the pneumatic means 3.
  • the drive means 29 comprise an electronic card 30 designed to drive a first solenoid valve 31, a second solenoid valve 32 and a third solenoid valve 33, the second solenoid valve 32 being located between the first solenoid valve 31 and the third solenoid valve 33.
  • the drive means 29 also comprise a chamber 34 located between the solenoid valves and the upper surface 27.
  • the chamber 34 which is shaped substantially like a parallelepiped, is equipped with a first conduit 35, extending substantially along the axis Z, a second conduit 36, a third conduit 37, opposite the second conduit 36 and a main conduit 41, substantially parallel with the first conduit 35.
  • the first conduit 35 connects the chamber 34 with the first pressure chamber 10 through a hole 38 made in the upper surface 27.
  • the second conduit 36 connects the chamber 34 with a second pressure chamber 39 located inside the guard 26 and extending in a direction substantially parallel with the first pressure chamber 10.
  • the third conduit 37 connects the chamber 34 with a third pressure chamber 40 located inside the guard 26 and extending in a direction substantially parallel with the second pressure chamber 39.
  • main conduit 41 connects the chamber 34 with a surface 42 of the actuator 4.
  • each presser device 1 The drive means 29 of each presser device 1 are controlled by a scanning barrier 43 positioned at a level above the conveyor belt 5 and upstream of the abrasive belt ( Figure 4 ).
  • the workpiece 2 When the workpiece 2 is positioned on the moving conveyor belt 5, it moves under the scanning barrier 43 which scans it and detects its size.
  • the scanning barrier 43 is opposite and substantially parallel with the shoes of the presser devices 1 and has a scan spacing 44 whose length is a third of the length of the shoe spacing 45.
  • each shoe is controlled by the three respective scan spaces 44 facing it along the axis X.
  • the scanning barrier 43 scans a portion of the workpiece 2 corresponding to three scan spaces 44, it means it is scanning an inside portion of the workpiece 2.
  • the scanning barrier 43 controls the respective shoe drive means 29 which activate the first solenoid valve 31.
  • the first solenoid valve 31 draws air from the first pressure chamber 10 through the first conduit 35 and applies it through the chamber 34 and the main conduit 41 to the surface 42 of the actuator 4.
  • the actuator 4 thus applies a first pressure level P1 to the underlying abrasive belt portion through the respective shoe.
  • the scanning barrier 43 scans a portion of the workpiece 2 corresponding to two scan spaces 44, it means it is scanning a portion of the workpiece 2 near an edge.
  • the scanning barrier 43 controls the respective shoe drive means 29 which activate the second solenoid valve 32.
  • the second solenoid valve 32 draws air from the second pressure chamber 39 through the second conduit 36 and applies it through the chamber 34 and the main conduit 41 to the surface 42 of the actuator 4.
  • the actuator 4 thus applies a second pressure level P2 that is lower than the first pressure level P1 to the underlying abrasive belt portion through the respective shoe.
  • the scanning barrier 43 scans a portion of the workpiece 2 corresponding to one scan space 44, it means it is scanning a portion of the workpiece 2 at an edge.
  • the scanning barrier 43 controls the respective shoe drive means 29 which activate the third solenoid valve 33.
  • the third solenoid valve 33 draws air from the third pressure chamber 40 through the third conduit 37 and applies it through the chamber 34 and the main conduit 41 to the surface 42 of the actuator 4.
  • the actuator 4 thus applies a third pressure level P3 that is lower than the second and first pressure levels P2 and P1 to the underlying abrasive belt portion through the respective shoe.
  • each actuator 4 moves independently of the others and that each applies a pressure level suited to the portion of the workpiece 2 being sanded.
  • each presser device 1 is equipped with pneumatic means 3 that can be driven by at least three different pressure levels: PI or P2 or P3.
  • presser devices 1 can modulate the pressure of the sanding unit more precisely than prior art devices, especially when working near the edge of the workpiece 2.
  • Sanding precision can thus be considerably improved by suitably adjusting the pressure to prevent damage such as splintering of workpiece edges, thus producing workpieces 2 with a better surface quality.
  • the actuator 4 is operated upon constantly during and before sanding starts by a counterpressure PC which is modulated to opposes the first pressure level P1, the second pressure level P2 or the third pressure level P3, as required.
  • the counterpressure PC works as follows: a solenoid valve, not illustrated, draws air from the counterpressure chamber 9 and channels it through the aperture 25 and through the first annular chamber 23 to the second annular chamber 24.
  • the counterpressure PC applied to the annular surface 24a of the actuator 4 facing the second annular chamber 24 enables the actuator 4 to be raised quickly as soon as sanding of the workpiece 2 is completed, that is to say, as soon as the pressing action of the first pressure level P1 or second pressure level P2 or third pressure level P3 ceases.
  • the counterpressure PC keeps the shoes in the raised position when sanding has been completed.
  • Figure 2 shows the actuating section of a sanding pad comprising a plurality of presser devices 1' positioned side by side in a second embodiment.
  • Each presser 1' comprises pneumatic means 3' equipped with an actuator 4' coupled to the shoe in a manner similar to that of the embodiment described above.
  • the presser devices 1' are mounted on a crosspiece 6', consisting for example of an aluminium extrusion positioned as described above.
  • the crosspiece 6' comprises a counterpressure chamber 9', a first pressure chamber 10', a second pressure chamber 39' and a third pressure chamber 40' independent of each other and extending parallel to each other for the full length of the crosspiece 6'.
  • the crosspiece 6' viewed in a vertical cross section, is substantially rectangular and has a plurality of sealed housings 7' extending along the axis Z.
  • Each housing 7' extends transversally to the crosspiece 6' and through the centre of the latter.
  • Each housing 7' is designed to contain a liner 8' of the pneumatic means 3', having the general form of a hollow cylinder and extending along the axis Z.
  • the liner 8' has five different inside diameters: a first inside diameter 11' in a first section 12'; a second inside diameter 13' in a second section 14'; a third inside diameter 15' in a third section 16'; a fourth inside diameter 47 in a fourth section 48; and a fifth inside diameter 53 in a fifth section 54.
  • the first inside diameter 11' is smaller than the second inside diameter 13' which is in turn smaller than the third inside diameter 15', which is smaller than the fourth and fifth inside diameters 47 and 53.
  • Each liner 8' is designed to receive a respective actuator 4' in such a way as to guarantee the dimensional precision required for coupling with the actuator 4' and to guarantee the smoothness of movement along the axis Z of the actuator 4' itself.
  • Each actuator 4' is shaped substantially like a cylinder extending along the axis Z and has four different outside diameters: a first outside diameter 17' in a first portion 18' of it; a second outside diameter 19' in a second portion 20' of it; a third outside diameter 21' in a third portion 22' of it; and a fourth outside diameter 49 in a fourth portion 50 of it.
  • the first outside diameter 17' is smaller than the second outside diameter 19' which is in turn smaller than the third outside diameter 21' which is smaller than the fourth outside diameter 49.
  • a third annular chamber 51 is created between the second portion 20' and the third section 16', and a fourth annular chamber 52 between the third portion 22' and the fourth section 48.
  • the sealing means 56 and the surface 42' define a substantially cylindrical cavity 57.
  • the crosspiece 6' also has a lateral surface 55 surmounted by a guard 26'.
  • the guard 26' and the lateral surface 55 define a compartment 28' for accommodating means 29' for driving the pneumatic means 3'.
  • the drive means 29' comprise an electronic card 30' designed to drive a first solenoid valve 31', a second solenoid valve 32' and a third solenoid valve 33', all three solenoid valves being located on the lateral surface 55.
  • the first pressure chamber 10' is driven by the first solenoid valve 31' and communicates with the cylindrical cavity 57 through a first, substantially horizontal conduit 35', and a first hole 58 made in a side portion 61 of the liner 8' at the first conduit 35'.
  • the second pressure chamber 39' is driven by the second solenoid valve 32' and communicates with the fourth annular chamber 52 through a second, substantially horizontal conduit 36', and a second hole 59 made in the side portion 61 at the second conduit 36'.
  • the third pressure chamber 40' is driven by the third solenoid valve 33' and communicates with the third annular chamber 51 through a third, substantially horizontal conduit 37', and a third hole 60 made in the side portion 61 at the third conduit 37'.
  • each presser device 1' The drive means 29' of each presser device 1' are controlled, like the first embodiment described above, by a scanning barrier 43 ( Figure 4 ).
  • the scanning barrier 43 scans a portion of the workpiece 2 corresponding to three scan spaces 44, it means it is scanning an inside portion of the workpiece 2.
  • the scanning barrier 43 controls the respective shoe drive means 29' which activate the first solenoid valve 31'.
  • the first solenoid valve 31' draws air from the first pressure chamber 10' and conveys it through the first conduit 35' to the cylindrical cavity 57.
  • the actuator 4' is thus forced to push down on the underlying abrasive belt portion through the respective shoe with a first pressure level P1'.
  • the scanning barrier 43 scans a portion of the workpiece 2 corresponding to two scan spaces 44, it means it is scanning a portion of the workpiece 2 near an edge.
  • the scanning barrier 43 controls the respective shoe drive means 29' which activate the first solenoid valve 31' and the second solenoid valve 32'.
  • the second solenoid valve 32' draws air from the second pressure chamber 39' and conveys it through the second conduit 36' to the fourth annular chamber 52.
  • the actuator 4' is thus forced to push down on the underlying abrasive belt portion through the respective shoe with a second pressure level P2' that is the sum of the first pressure PP1 and of the first counterpressure PC1, which is lower than the first pressure level P1'.
  • the scanning barrier 43 scans a portion of the workpiece 2 corresponding to one scan space 44, it means it is scanning a portion of the workpiece 2 at an edge.
  • the scanning barrier 43 controls the respective shoe drive means 29' which activate the first solenoid valve 31' and the third solenoid valve 33'.
  • the third solenoid valve 33' draws air from the third pressure chamber 40' and conveys it through the third conduit 37' to the third annular chamber 51.
  • the actuator 4' is thus forced to push down on the underlying abrasive belt portion through the respective shoe with a third pressure level P3' that is the sum of the first pressure PP1 and of the second counterpressure PC2, which is lower than the second pressure level P2'.
  • first solenoid valve 31' draws air from the first pressure chamber 10' and conveys it through the first conduit 35' to the cylindrical cavity 57
  • second solenoid valve 32' draws air from the second pressure chamber 39' and conveys it through the second conduit 36' to the fourth annular chamber 52
  • third solenoid valve 33' draws air from the third pressure chamber 40' and conveys it through the third conduit 37' to the third annular chamber 51.
  • the actuator 4' is thus forced to push down on the underlying abrasive belt portion through the respective shoe with a fourth pressure level P4 that is the sum of the first pressure PP1, the first counterpressure PC1 and the second counterpressure PC2, which is lower than the third pressure level P3'.
  • presser devices 1 can modulate the contact pressure of the sanding unit on the workpiece 2 more precisely than prior art devices, especially when working near an edge of the workpiece 2.
  • the actuator 4' is operated upon constantly during and before sanding starts by a counterpressure PC' which is modulated to oppose the first pressure level P1', the second pressure level P2', the third pressure level P3' or the fourth pressure level P4, as required.
  • the counterpressure PC is produced by a solenoid valve, not illustrated, which draws air from the counterpressure chamber 9' and channels it through the first annular chamber 23' to the second annular chamber 24'.
  • the counterpressure PC applied to the second annular chamber 24' enables the actuator 4' to be raised quickly as soon as sanding of the workpiece 2 is completed, that is to say, as soon as the pressing action of the first pressure level P1', of the second pressure level P2', of the third pressure level P3' or of the fourth pressure level P4 ceases.
  • the counterpressure PC keeps the shoes in the raised position when sanding has been completed.
  • Figure 3 shows an alternative version, labelled 1' ', of the presser device 1' of Figure 2 ;
  • the presser device 1' ' is substantially the same as the device 1' and is not therefore described in detail below.
  • the presser device 1" does not have the liner 8' and the five different inside diameters are made directly in a housing 7" of a crosspiece 6": a first inside diameter 11'' in a first section 12 " ; a second inside diameter 13'' in a second section 14" ; a third inside diameter 15'' in a third section 16"; a fourth inside diameter 47' in a fourth section 48'; and a fifth inside diameter 53' in a fifth section 54'.
  • the first inside diameter 11' ' is smaller than the second inside diameter 13' ' which is in turn smaller than the third inside diameter 15' ' , which is smaller than the fourth and fifth inside diameters 47' and 53'.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Press Drives And Press Lines (AREA)
  • Glass Compositions (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Confectionery (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)

Claims (23)

  1. Un dispositif presseur pouvant être associé à une ponceuse pour exercer une pression sur une pièce à usiner (2) par l'intermédiaire de moyens pneumatiques (3; 3') et comprenant des moyens d'actionnement (31; 31'; 32; 32') destinés à appliquer un premier niveau de pression (P1; P1') sur les moyens pneumatiques (3; 3') ou un deuxième niveau de pression (P2; P2') sur ces mêmes moyens pneumatiques (3; 3') et des moyens de contre-pression destinés à générer une contre-pression (PC; PC') afin d'éloigner les moyens pneumatiques (3; 3') de la pièce à usiner (2), le dispositif presseur comprenant aussi d'autres moyens d'actionnement (33; 33') destinés à appliquer au moins un troisième niveau de pression (P3; P3'; P4) sur les moyens pneumatiques (3; 3') ; le dispositif comprenant en outre des moyens à chambre de pression (9, 10, 39, 40; 9', 10', 39', 40') s'étendant dans une direction essentiellement transversale à un axe (X) d'avancement de la pièce à usiner (2) et comprenant des chambres indépendantes et essentiellement adjacentes entre elles ; lesdits moyens à chambre de pression comprenant une première chambre de pression (10; 10'), une deuxième chambre de pression (39; 39'), une troisième chambre de pression (40; 40') et une chambre de contre-pression (9; 9') ; la première chambre de pression (10; 10'), la deuxième chambre de pression (39; 39'), la troisième chambre de pression (40; 40') et la chambre de contre-pression (9; 9') étant réalisées sous forme de moyens à traverse (6') qui supportent les moyens pneumatiques (3; 3'), ledit dispositif étant caractérisé en ce que la première chambre de pression (10; 10'), la deuxième chambre de pression (39; 39'), la troisième chambre de pression (40; 40') et la chambre de contre-pression (9; 9') sont disposées essentiellement l'une au-dessus de l'autre.
  2. Le dispositif selon la revendication 1, caractérisé en ce que les moyens d'actionnement (31; 31'; 32; 32') comprennent des premiers moyens d'actionnement (31; 31') destinés à générer le premier niveau de pression (P1; P1').
  3. Le dispositif selon la revendication 1 ou 2, caractérisé en ce que les moyens d'actionnement (31; 31'; 32; 32') comprennent des deuxièmes moyens d'actionnement (32; 32') destinés à générer le deuxième niveau de pression (P2; P2').
  4. Le dispositif selon l'une des revendications précédentes, caractérisé en ce que les moyens d'actionnement comprennent une première électrovanne (31; 31') et une deuxième électrovanne (32; 32'), les autres moyens d'actionnement comprennent une troisième électrovanne (33; 33') et les moyens de contre-pression (9; 9') comprennent une électrovanne, toutes ces électrovannes étant destinées à mouvoir les moyens pneumatiques (3; 3') le long d'un autre axe (Z) essentiellement vertical.
  5. Le dispositif selon la revendication 4, caractérisé en ce que la première électrovanne (31; 31'), la deuxième électrovanne (32; 32') et la troisième électrovanne (33; 33') communiquent, respectivement, avec la première chambre de pression (10; 10'), avec la deuxième chambre de pression (39; 39') et avec la troisième chambre de pression (40; 40') à travers, respectivement, des premiers moyens à conduit (35; 35'), des deuxièmes moyens à conduit (36; 36') et des troisièmes moyens à conduit (37; 37').
  6. Le dispositif selon la revendication 5, caractérisé en ce que les premiers moyens à conduit (35), les deuxièmes moyens à conduit (36) et les troisièmes moyens à conduit (37) débouchent dans une autre chambre de pression (34) équipée d'un conduit (41) qui relie ladite autre chambre de pression (34) aux moyens pneumatiques (3).
  7. Le dispositif selon l'une des revendications précédentes de 4 à 6, caractérisé en ce que la première électrovanne (31), la deuxième électrovanne (32) et la troisième électrovanne (33) sont destinées, chacune, à générer un niveau de pression (P1; P2; P3) qui a tendance à approcher les moyens pneumatiques (3) de la pièce à usiner (2).
  8. Le dispositif selon l'une des revendications précédentes de 4 à 7, caractérisé en ce que la première électrovanne (31), la deuxième électrovanne (32) et la troisième électrovanne (33) sont destinées à appliquer une pression sur des moyens à surface (42) des moyens pneumatiques (3).
  9. Le dispositif selon l'une des revendications précédentes de 4 à 8, caractérisé en ce que l'électrovanne est destinée à appliquer une pression sur des premiers moyens à chambre annulaire (23) qui communiquent avec des deuxièmes moyens à chambre annulaire (24), les premiers moyens à chambre annulaire (23) et les deuxièmes moyens à chambre annulaire (24) étant réalisés entre les moyens pneumatiques (3) et les moyens à traverse (6).
  10. Le dispositif selon l'une des revendications précédentes de 4 à 7, caractérisé en ce que la première électrovanne (31') est destinée à générer une pression (PP1) qui a tendance à approcher les moyens pneumatiques (3) de la pièce à usiner (2), la deuxième électrovanne (32') est destinée à générer une première contre-pression (PC1) qui a tendance à éloigner les moyens pneumatiques (3') de la pièce à usiner (2) et la troisième électrovanne (33') est destinée à générer une deuxième contre-pression (PC2) qui a tendance à éloigner les moyens pneumatiques (3') de la pièce à usiner (2).
  11. Le dispositif selon l'une des revendications précédentes de 4 à 10, caractérisé en ce que la première électrovanne (31') coopère avec la deuxième électrovanne (32') pour générer un deuxième niveau de pression (P2').
  12. Le dispositif selon l'une des revendications précédentes de 4 à 11, caractérisé en ce que la première électrovanne (31') coopère avec la troisième électrovanne (33') pour générer un troisième niveau de pression (P3').
  13. Le dispositif selon l'une des revendications précédentes de 4 à 12, caractérisé en ce que la première électrovanne (31') coopère avec la deuxième électrovanne (32') et avec la troisième électrovanne (33') pour générer un quatrième niveau de pression (P4).
  14. Le dispositif selon l'une des revendications précédentes de 4 à 13, caractérisé en ce que la première électrovanne (31') est destinée à appliquer un niveau de pression (P1) sur des moyens à surface (42') des moyens pneumatiques (3').
  15. Le dispositif selon l'une des revendications précédentes de 4 à 14, caractérisé en ce que l'électrovanne, la deuxième électrovanne (32') et la troisième électrovanne (33') sont destinées à appliquer une pression, respectivement, sur des premiers moyens à chambre annulaire (23') qui communiquent avec des deuxièmes moyens à chambre annulaire (24'), sur des troisièmes moyens à chambre annulaire (51) et sur des quatrièmes moyens à chambre annulaire (52), les premiers moyens à chambre annulaire (23'), les deuxièmes moyens à chambre annulaire (24'), les troisièmes moyens à chambre annulaire (51) et les quatrièmes moyens à chambre annulaire (52) étant réalisés entre les moyens pneumatiques (3) et les moyens à traverse (6).
  16. Le dispositif selon la revendication 15, caractérisé en ce que des moyens de logement (7; 7') sont prévus entre les moyens pneumatiques (3; 3') et les moyens à traverse.
  17. Le dispositif selon la revendication 16, caractérisé en ce que les moyens de logement comprennent des moyens à chemise (8).
  18. Le dispositif selon l'une des revendications précédentes, caractérisé en ce que les moyens pneumatiques comprennent des moyens actionneurs (4; 4') essentiellement cylindriques et s'étendant le long dudit autre axe (Z).
  19. Le dispositif selon la revendication 18, caractérisé en ce que les moyens actionneurs (4; 4') ont une séquence de diamètres différents.
  20. Le dispositif selon l'une des revendications précédentes, comprenant des moyens à carter (26; 26') associés aux moyens à traverse (6; 6') destinés à recevoir les moyens d'actionnement (9, 10, 39, 40; 9', 10', 39', 40').
  21. Le dispositif selon la revendication 18, caractérisé en ce que les moyens à carter (26) sont associés à des moyens à surface supérieure des moyens à traverse (6).
  22. Le dispositif selon la revendication 18 ou 19, caractérisé en ce que les moyens à carter (26) sont destinés à recevoir la deuxième chambre de pression (39) et la troisième chambre de pression (40).
  23. Le dispositif selon l'une des revendications précédentes de 18 à 20, caractérisé en ce que les moyens à carter (26') sont associés à des moyens à surface latérale (55) des moyens à traverse (6').
EP06112850A 2005-05-02 2006-04-20 Dispositif presseur Active EP1719586B1 (fr)

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IT000109A ITMO20050109A1 (it) 2005-05-02 2005-05-02 Dispositivo pressore.

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EP1719586B1 true EP1719586B1 (fr) 2008-04-23

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AT (1) ATE392988T1 (fr)
DE (1) DE602006000971T2 (fr)
DK (1) DK1719586T3 (fr)
ES (1) ES2306369T3 (fr)
IT (1) ITMO20050109A1 (fr)

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CN102649241B (zh) * 2012-05-23 2013-11-20 中国重汽集团大同齿轮有限公司 汽车变速箱输出轴零件钻斜孔夹具

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1248812B (it) * 1990-05-24 1995-01-30 Sbf Consult S R L Tampone comandabile perla levigatura di pannelli
IT1257801B (it) * 1992-05-21 1996-02-13 Dmc Spa Macchina levigatrice di pannelli in legno
DE4232028C2 (de) * 1992-09-24 1995-01-05 Buetfering Maschinenfabrik Gmb Druckbalken für eine Breitbandschleifmaschine
DE19933946A1 (de) * 1999-07-20 2001-01-25 Buetfering Maschinenfabrik Gmb Druckbalken

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EP1719586A1 (fr) 2006-11-08
DK1719586T3 (da) 2008-08-18
DE602006000971D1 (de) 2008-06-05
ES2306369T3 (es) 2008-11-01
ATE392988T1 (de) 2008-05-15
ITMO20050109A1 (it) 2006-11-03
DE602006000971T2 (de) 2009-05-28

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