EP0033252A1 - Dispositif pour déplacer des produits en bobines ou en barres vers une machine - Google Patents

Dispositif pour déplacer des produits en bobines ou en barres vers une machine Download PDF

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Publication number
EP0033252A1
EP0033252A1 EP81400009A EP81400009A EP0033252A1 EP 0033252 A1 EP0033252 A1 EP 0033252A1 EP 81400009 A EP81400009 A EP 81400009A EP 81400009 A EP81400009 A EP 81400009A EP 0033252 A1 EP0033252 A1 EP 0033252A1
Authority
EP
European Patent Office
Prior art keywords
crank
rack
movable clamp
movable
clamp
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.)
Withdrawn
Application number
EP81400009A
Other languages
German (de)
English (en)
French (fr)
Inventor
Philippe Dargent
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.)
SA Normatic (societe Anonyme Francaise)
Original Assignee
SA Normatic (societe Anonyme Francaise)
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 SA Normatic (societe Anonyme Francaise) filed Critical SA Normatic (societe Anonyme Francaise)
Publication of EP0033252A1 publication Critical patent/EP0033252A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/16—Advancing webs by web-gripping means, e.g. grippers, clips
    • B65H20/18—Advancing webs by web-gripping means, e.g. grippers, clips to effect step-by-step advancement of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/11—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers for feeding sheet or strip material

Definitions

  • the present invention relates to a device for moving products in reels or in bars towards a machine comprising a movable clamp and a fixed clamp which open and grasp alternately the product to be transported.
  • the movable clamp is moved in an alternating movement by means of a crank-connecting rod assembly.
  • This device is particularly suitable for metal cutting presses whose action is controlled by a crankshaft.
  • These devices include a frame carrying the clamps and means for moving the movable clamp in an alternating movement comprising a crank rotating about an axis perpendicular to the direction of movement of the movable clamp and a connecting rod articulated at the free end of the crank and the movable clamp and means for rotating the crank.
  • Such a device is known for example according to French patent n ° 1139 635 in which the drive of an eccentric articulated with a telescopic spring rod is carried out by means of the movement transmitted by a cutting press associated with the device by the through a clutch.
  • the stroke of the movable clamp is limited by stops whose spacing allows the length of the stroke to be adjusted.
  • Such devices have the disadvantage of requiring a mechanical connection between the means drive the crank to a mechanical member of the cutting press, such as a crankshaft which leads to the impossibility of making several advances and reversals of the movable clamp, then a crankshaft of the press. A rupture of the aforementioned connecting members is also to be feared in the event of blockage of the strip to be cut in the press.
  • the movable gripper with a substantially constant speed is decelerated at the end of the stroke by hydraulic or pneumatic dampers. Sudden starts, constant speed and decelerations at the end of the race constitute obstacles to obtaining high production rates.
  • the aforementioned devices are often of a high noise level and a large size.
  • the object of the present invention is to remedy the drawbacks of the aforementioned known embodiment.
  • the device contemplated by the invention for moving products in reels or in bars towards a machine such as a press, by means of a fixed clamp and a movable clamp provided with clamping means and intended to hold and release alternately the displaced product comprises a frame carrying said clamps, means for moving the movable clamp in an alternating movement comprising a crank rotating about an axis perpendicular to the direction of movement of the movable clamp and a connecting rod articulated at the free end of the crank and at the movable clamp and means being provided for rotating the crank.
  • this device is characterized in that the means for rotating the crank comprise a rack meshing with a pinion carried by the axis of the crank, this rack comprising at its opposite ends two pistons slidably mounted in a cylinder body, these two pistons being movable in the cylinder body under the action of a fluid, in an alternating translational movement.
  • the limit switches of the movable clamp correspond to the two positions angularly spaced by 180 ° in which the axis of the crank is parallel to that of the connecting rod.
  • the jack instead of directly requesting the movable clamp, acts on the latter by means of a rack, a pinion, a crank and a connecting rod, the force to be applied to the Rack pistons can be reduced, so that fluid consumption is also reduced.
  • the device for moving the metal strip 1 from a coil to the press 2 comprises a frame 3 carrying a fixed clamp 4 and a movable clamp 5. No mechanical link is provided between the device and the press.
  • the mobile clamp 5 is mounted on two parallel slides 6.
  • the fixed clamp 4 and mobile 5 have openings 8 and 7 in which the metal strip 1 is engaged.
  • the movable clamp 5 comprises an upper jaw 9 and a lower jaw 10, the latter being connected to a piston 11 slidably mounted in a cylindrical body of a pneumatic or hydraulic jack 12.
  • the fixed clamp 4 comprises an upper jaw 13 and a lower jaw 14, the latter being connected to a piston 15 slidably mounted in a cylindrical body of jack 16.
  • the device according to the invention comprises means which will be detailed below to move the movable clamp 5 in an alternating movement between a position remote from the fixed clamp 4 (see FIG. 2) and a position close to the fixed clamp 4 (see figure 3).
  • Control means not shown but conventional, jacks 12 and 16 are provided for actuating on the one hand the piston 11 upwards so as to pinch the strip 1 between the jaws 9 and 10, and on the other hand to move the piston 15 downwards, so as no longer to tighten the strip 1 in the fixed clamp 4, before the displacement of the movable clamp 5 towards the fixed clamp 4 (see arrow F in FIG. 2).
  • the aforementioned means cause the piston 15 to rise so as to retain the strip 1 in the fixed clamp 4 and also cause lowering of the piston 11 which releases the strip 1.
  • the means for moving the movable clamp 5 comprise a crank 17 capable of turning about a vertical axis XX 'perpendicular to the direction of movement of the metal strip 1.
  • the free end 18 of this crank 17 is linked by a ball joint to a connecting rod 19 which is itself linked by a ball joint to a pivot 20 of the movable clamp 5.
  • the crank 17 is carried by a shaft 21 of axis XX ' d tnt the opposite end to the crank carries a pinion 22 meshing with a rack 23.
  • This rack 23 carries at its opposite ends pistons 24 and 25 which slide in a cylindrical body of hydraulic or pneumatic cylinder 26.
  • the lines 29 and 30 are connected to a fluid distributor, not shown, which is provided for alternately introducing the fluid into the chambers 27 and 28 in order to ensure the displacement of the rack 23 according to an alternating translational movement.
  • the stroke of the rack 23 in the cylinder body 26 and the ratio of the number of teeth of the pinion 22 to that of the rack 23 are such that the crank 17 describes an angle of rotation substantially equal to 180 ° between the two limit positions shown in Figures 2 and 3.
  • crank 17 is parallel to the connecting rod 19, its articulation 18 is to the left of the axis X-X '.
  • the movable clamp 5 is in the position furthest from the fixed clamp 4, as indicated in FIG. 2.
  • the movable clamp 5 is open, the fixed clamp 4 is closed.
  • the order given by the press causes the mobile clamp 5 to be tightened and the fixed clamp 4 to open.
  • the pneumatic or hydraulic fluid is introduced into the chamber 27 of the jack 26 by the line 29 which has the effect of pushing the piston 24 in the direction of the arrow F3 (see FIG. 2).
  • the fluid contained in the chamber 28 is evacuated through the pipe 30.
  • the rack 23 rotates the crank 17 which moves by means of the connecting rod 19 the movable clamp 5 in the direction of the arrow F. This movement drives the strip 1 towards the press 2.
  • the acceleration of the translational movement of the movable clamp 5 being progressive, it is possible to use translating and clamping jacks of smaller volumes than in a jack system directly coupled to the movable clamp, which allows savings to be made. fluid consumption.
  • the movement of the movable clamp 5 undergoes a progressive deceleration ve which is also favorable to the proper functioning of the device according to the invention.
  • the movable clamp 5 reaches the end of the stroke, as indicated in FIG. 3, the jaw 14 closes, the jaw 10 opens. Then the piston 25 is pushed in the direction of the arrow F4 by the fluid introduced into the chamber 28 through the pipe 30. The movable clamp 5 thus returns to its initial position by moving in the direction of the arrow F1.
  • the device according to the invention operates smoothly, with substantially progressive accelerations and decelerations of the translational movement of the movable clamp 5 and of the strip 1.
  • the operation of the device according to the invention is thus carried out at a much lower noise level than that of known devices in which the movable clamp 5 is translated directly by a jack.
  • the movement of the strip 1 can be carried out at a higher speed, which makes it possible to obtain better production rates.
  • each shock absorber comprises a piston 33 sliding in a cylindrical body 34.
  • the pistons 33 each carry a cylindrical rod 35 extending axially into the chambers 27 and 28; the end 35a of the rod 35 of the piston 33 comes into contact with the piston 24 of the rack 23 before the end of travel of the latter.
  • the shock absorbers are similar at the two ends of the jack 26.
  • Each cylindrical body 34 of a shock absorber 31 has on its side wall, opposite the piston 33, an orifice which opens into a pipe 36 then into a reservoir 37.
  • the shape of the above orifice must be such that it allows an increasingly reduced flow of the fluid contained in the shock absorber, as the piston 33 of the shock absorber is pushed in.
  • the pipe 36 may include a bypass 38 which opens into the body of the cylinder 34 between the piston 33 and the adjacent end 26a or 26b of the jack body 26.
  • crank 17 it is also advantageous for the crank 17 to include means for adjusting the distance d between its axis of rotation XX 'and the axis YY' for fixing the connecting rod 19 (FIG. 5) to modify the stroke of the clamp. mobile 5.
  • these means comprise a screw 39 installed inside the crank 17 and supported by two bearings integral with the crank 17.
  • the end 39a of the screw is screwed into the lower part 40 of the pivot 41 on which the end 19a of the connecting rod 19 is hingedly mounted.
  • the lower part 40 of the pivot 41 is guided in the direction of elongation of the distance d in a tee groove 42 (see also Figure 1).
  • the other end 39b of the screw 39 which is located in Figure 5 to the right of the axis XX 'carries a button 43 or a crank whose rotation causes that of the screw 39.
  • a button 43 or a crank whose rotation causes that of the screw 39.
  • the nut 44 serves to lock the lower end 40 of the pivot 41 in the tee groove 42 of the crank 17.
  • crank 17 can be controlled by induction coils.
  • the device according to the invention can be used to move both a product appearing in a reel such as for example a strip or bars of various profiles, the movable and fixed clamps 4 being in these cases suitable to the shape of the product to advance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP81400009A 1980-01-24 1981-01-07 Dispositif pour déplacer des produits en bobines ou en barres vers une machine Withdrawn EP0033252A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8001522A FR2474357A1 (fr) 1980-01-24 1980-01-24 Dispositif pour deplacer des produits en bobines ou en barres vers une machine
FR8001522 1980-01-24

Publications (1)

Publication Number Publication Date
EP0033252A1 true EP0033252A1 (fr) 1981-08-05

Family

ID=9237832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400009A Withdrawn EP0033252A1 (fr) 1980-01-24 1981-01-07 Dispositif pour déplacer des produits en bobines ou en barres vers une machine

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EP (1) EP0033252A1 (enrdf_load_html_response)
FR (1) FR2474357A1 (enrdf_load_html_response)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092849A1 (en) * 1982-04-28 1983-11-02 Yoshida Kogyo K.K. Intermittent feed mechanism
EP0125367A1 (de) * 1983-05-04 1984-11-21 E. Bruderer Maschinenfabrik AG Zangen-Vorschubgerät an Pressen oder dergleichen
US4925078A (en) * 1987-12-23 1990-05-15 Leinhaas Industrieberatung Gripper feed device
NL1019658C2 (nl) * 2001-12-24 2003-06-30 Wilto Engineering Laadinrichting.
WO2011053912A1 (en) 2009-10-30 2011-05-05 Vamco International, Inc. Material feeding apparatus with gripper driving member and linkage
CN103586935A (zh) * 2012-08-15 2014-02-19 盐城市协和机械有限公司 砂纸布模切裁断工艺及其生产设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102527849B (zh) * 2012-01-12 2013-12-25 天津市津荣天宇精密机械有限公司 模具内无废料冲铆焊片机构

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2383866A1 (fr) * 1977-03-17 1978-10-13 Bihler Otto Dispositif d'avancement pour matieres en bande

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1406310A (en) * 1921-04-07 1922-02-14 Harry C H Walsh Automatic feed mechanism for punch presses
FR846904A (fr) * 1938-07-25 1939-09-28 Gardy Particip App Dispositif automatique d'avancement de la pièce à travailler dans un bloc à colonnes
US2825560A (en) * 1955-08-19 1958-03-04 Danly Mach Specialties Inc Grip feed
FR1139635A (fr) * 1955-10-13 1957-07-03 Cie Ind Francaise Tubes Elect Ameneur automatique de précision
FR1362867A (fr) * 1963-07-04 1964-06-05 Norton Tool Company Ltd Perfectionnements aux mécanismes d'alimentation, en particulier pour presses
FR1447643A (fr) * 1964-09-22 1966-07-29 May Pressenbau Gmbh Dispositif d'alimentation pour produits en forme de bandes ou de rubans
US3462056A (en) * 1967-08-15 1969-08-19 Albert W Scribner Stock feeder
DE2153991C3 (de) * 1971-10-29 1981-07-16 L. Schuler GmbH, 7320 Göppingen Fördervorrichtung mit Förderzange zum schrittweisen Zuführen von Blechbändern oder Blechstreifen
DE2454460A1 (de) * 1974-11-16 1976-05-20 Grau Erich Stanzwerk Elek Vorschubvorrichtung zur intermittierenden materialzufuhr an stanzen oder pressen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2383866A1 (fr) * 1977-03-17 1978-10-13 Bihler Otto Dispositif d'avancement pour matieres en bande

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0092849A1 (en) * 1982-04-28 1983-11-02 Yoshida Kogyo K.K. Intermittent feed mechanism
EP0125367A1 (de) * 1983-05-04 1984-11-21 E. Bruderer Maschinenfabrik AG Zangen-Vorschubgerät an Pressen oder dergleichen
US4925078A (en) * 1987-12-23 1990-05-15 Leinhaas Industrieberatung Gripper feed device
NL1019658C2 (nl) * 2001-12-24 2003-06-30 Wilto Engineering Laadinrichting.
WO2011053912A1 (en) 2009-10-30 2011-05-05 Vamco International, Inc. Material feeding apparatus with gripper driving member and linkage
EP2493636A4 (en) * 2009-10-30 2017-01-04 Vamco International, Inc. Material feeding apparatus with gripper driving member and linkage
CN103586935A (zh) * 2012-08-15 2014-02-19 盐城市协和机械有限公司 砂纸布模切裁断工艺及其生产设备
CN103586935B (zh) * 2012-08-15 2016-03-16 盐城市协和机械有限公司 砂纸布模切裁断工艺及其生产设备

Also Published As

Publication number Publication date
FR2474357B1 (enrdf_load_html_response) 1983-09-16
FR2474357A1 (fr) 1981-07-31

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810110

AK Designated contracting states

Designated state(s): BE CH DE GB IT NL SE

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19820515

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DARGENT, PHILIPPE