EP3991874A1 - Groupe de transfert dans une ligne de formage - Google Patents

Groupe de transfert dans une ligne de formage Download PDF

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Publication number
EP3991874A1
EP3991874A1 EP21190828.0A EP21190828A EP3991874A1 EP 3991874 A1 EP3991874 A1 EP 3991874A1 EP 21190828 A EP21190828 A EP 21190828A EP 3991874 A1 EP3991874 A1 EP 3991874A1
Authority
EP
European Patent Office
Prior art keywords
slider
transferring
control
tubular
stator
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
EP21190828.0A
Other languages
German (de)
English (en)
Other versions
EP3991874B1 (fr
Inventor
Stefano Maranta
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.)
Sacma Limbiate SpA
Original Assignee
Sacma Limbiate SpA
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Filing date
Publication date
Application filed by Sacma Limbiate SpA filed Critical Sacma Limbiate SpA
Publication of EP3991874A1 publication Critical patent/EP3991874A1/fr
Application granted granted Critical
Publication of EP3991874B1 publication Critical patent/EP3991874B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/02—Feeding devices for rods, wire, or strips
    • B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/022—Special design or construction multi-stage forging presses
    • 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
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • 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

Definitions

  • the present invention relates to a transferring group in a moulding line, especially it relates to a control system of the transferring group.
  • transferring groups advancing the pieces from a working position to the other are provided.
  • the transferring groups are provided with a plurality of openable and closable controlled grippers, which the mesh, the movement and the automatic release of the pieces are being achieved with.
  • grippers are controlled by a mechanical kinematic motion, provided with drive cams and a transmission rocking lever elastically pushed in a closing position of the gripper. This configuration turned out so far to be very stout and suitable to bear the working rhythm, even compatibly with the cross-transferring movement of the grippers.
  • FIG. 1 - representing a perspective view of a single control unit of a gripper of a prior art transferring group - the kinematic control chain of the gripper is being well represented.
  • a first drive lever provided with a yielding roller, receives the motion from a rotating cam profile and transfers it to a control end. The latter transfers a force directed on a vertical axis to a yielding end of a rocking lever, as opposed to a pneumatic cylinder loaded in the upward direction.
  • a rocking lever fulcrum is being assembled on a first ledger, movable in an alternate motion in a cross direction to the kinematic chain, so to implement the advancing alternating movement of the transferring group.
  • the grippers are being assembled on a second movable ledger, too, that moves with a parallel motion in relation to the first ledger.
  • the opposite control end of the rocking lever acts with an alternate vertical force on a sliding rod, that controls the closing (downward) and the opening (upward) of a clamping gripper of the pieces being processed.
  • a transferring group comprises, in a known way per se, a plurality of control units U, that open and close transferring grippers P.
  • the units U are assembled next to one another, and they each provide a kinematic chain transferring an opening/closing control from a respective controlled actuator M to the relevant gripper P.
  • first side transferring means typically a ledger T 1 movable with a reciprocating movement in a transferring direction.
  • Each gripper P presents two jaws being clamped or opened between each other by the drive of a movable control rod A in a control direction, usually an essentially vertical direction. Further details of the configuration of these grippers are not being provided in this context, because they are per se known in the field.
  • Each control rod A is guided in its motion from an appropriate pilot boss B.
  • a double engaging flange 1 is fixed, in which a fork 2 of a transmission rocking lever 3 is engageable.
  • the transmission rocking lever 3 is assembled being rocking around a fulcrum axis 4 orthogonal to the control direction of the rod A.
  • the fulcrum axis 4 is provided at the upper end of a bearing column 5.
  • the bearing columns 5 of all control units U are being constrained to the same second side transferring means, e.g. a second ledger T 2 movable with a alternating movement in the transferring direction.
  • the yielding end 6 of the rocking lever 3 is engaged with a first end 7 of a control lever 8.
  • the coupling means between the yielding end 6 of the rocking lever 3 and the first end 7 of the control lever 8 allow a maladjustment between the movement planes of the rocking lever and the lever, to support the relevant cross movements between rocking lever (movable with the second ledger T 2 ) and lever.
  • the lever 8 being generally L-shaped and tilting-assembled around a fulcrum axis 9 essentially centred-arranged in relation to the two arms of the L-shaped profile.
  • a second end 10 is provided being connected through an articulated rod 11 to a movable component of the actuator M.
  • the actuator M is a tubular linear motor.
  • the motor M comprises a stator 100, with the primary electric winding, and a slider 101, comprising permanent magnets, being designed to be reciprocally axially movable.
  • stator being shaped as a core cylindric body, while the slider 101 being composed of a series of permanent toroidal-shaped magnets, assembled parallelly among each other so to form a sleeve or a tubular coaxial body and longitudinally sliding on the stator 100.
  • tubular linear motor may indifferently provide configurations in which the primary or the secondary are fixed to a frame and may get the movement of the other one.
  • the illustrated configuration is being suitably selected, so to move the part with less inertia and/or that does not require a power supply with electric cables.
  • the cylindric stator 100 shows a rear flange 102a, being suitably constrained to a fixed structure of a frame of the machine.
  • the cylindric stator 100 is integral with a bearing column 102b integral to a terminal board 103 constrained to the same fixed structure od the frame of the machine.
  • the slider 101 shows a guide flange 104, from which, in a front direction, a front section 105 leans forward.
  • the latter presents a longitudinal groove in which the bearing column 102b is being positioned.
  • the guide flange 104 is integral to a saddle 104a being slidingly assembled on the terminal board 103. Further, the saddle 104a presents a connection bridge 104b to the slider body.
  • the front section 105 of the slider 101 is constrained to the articulated rod 11: therefore, the linear movement of the slider 101 on the stator 100 is being transmitted to the control lever 8 rotating around its own fulcrum axis 9.
  • the actuator unit M comprises a linear position transducer 106, detecting the position of the slider in relation to the stator.
  • a transducer 106 detector is installed on the fixed terminal board 103 near the saddle 104a and it detects the position of a feedback element (e.g. a magnet) integral in the movement to the saddle 104a.
  • a zero-setting thickness 107 is preferably provided, assembled on the rear flange 102a so to determine a bottom striking surface of the rear stroke for the slider.
  • tubular linear motor M can cause the movable part to execute an alternating linear movement, that is the slider 101 in relation to the stator 100.
  • the motor being programmed to execute a prefixed active run, for example a 34 mm long run.
  • the position of the slider 101 being detected and feedback-managed by means of a position signal coming from the linear position transducer 106.
  • control logic At the ignition of the system the control logic is being set to bring the slider (or secondary) "striking" all backward on the zero-setting thickness 107, then it executes a little forward run, e.g. a 1 mm long one; this is the zero-position of the actuator M; from this zero-position the motor may perform its active run, e.g. a 34 mm long one.
  • the back-and-forth movement of the slider 101 and of its front section 105 determines the tilting movement of the rocking lever 3 and therefore it moves downward and upward, respectively, the control rod A determining the closing ( fig. 4 ) and the opening ( fig. 3 ) of the gripper P.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials For Medical Uses (AREA)
  • Manipulator (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Credit Cards Or The Like (AREA)
EP21190828.0A 2020-10-30 2021-08-11 Groupe de transfert dans une ligne de formage Active EP3991874B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000025795A IT202000025795A1 (it) 2020-10-30 2020-10-30 Gruppo di trasferta in una linea di stampaggio

Publications (2)

Publication Number Publication Date
EP3991874A1 true EP3991874A1 (fr) 2022-05-04
EP3991874B1 EP3991874B1 (fr) 2023-06-28

Family

ID=74194865

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21190828.0A Active EP3991874B1 (fr) 2020-10-30 2021-08-11 Groupe de transfert dans une ligne de formage

Country Status (4)

Country Link
EP (1) EP3991874B1 (fr)
ES (1) ES2951497T3 (fr)
IT (1) IT202000025795A1 (fr)
PL (1) PL3991874T3 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE902755A (fr) * 1984-06-29 1985-10-16 Nat Machinery Co Dispositif de transfert de machine a former et machine a former equipee de ce dispositif.
US5005397A (en) * 1988-08-09 1991-04-09 The National Machinery Company Method for providing progressive formers with quick-change tooling
WO2005011894A1 (fr) * 2003-08-01 2005-02-10 Amafa Service Srl Dispositif pour transferer des produits semi-finis sur des presses multistations
EP1958716A1 (fr) 2007-02-14 2008-08-20 Sacma Limbiate S.p.A. Dispositif de réglage automatique des commandes de cames dans une machine à forger
CH712401A1 (de) * 2016-04-28 2017-10-31 Hatebur Umformmaschinen Ag Transportvorrichtung zum Umsetzen von Werkstücken in einer mindestens zwei Stufen umfassenden Bearbeitungseinrichtung.
US20170341126A1 (en) * 2016-05-26 2017-11-30 Daido Steel Co., Ltd. Transfer device of multistage forging press machine
EP3524371A1 (fr) * 2018-02-12 2019-08-14 Fagor Arrasate, S.Coop. Système et procédé de transport de pièces à usiner dans des machines de formage

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE902755A (fr) * 1984-06-29 1985-10-16 Nat Machinery Co Dispositif de transfert de machine a former et machine a former equipee de ce dispositif.
US5005397A (en) * 1988-08-09 1991-04-09 The National Machinery Company Method for providing progressive formers with quick-change tooling
WO2005011894A1 (fr) * 2003-08-01 2005-02-10 Amafa Service Srl Dispositif pour transferer des produits semi-finis sur des presses multistations
EP1958716A1 (fr) 2007-02-14 2008-08-20 Sacma Limbiate S.p.A. Dispositif de réglage automatique des commandes de cames dans une machine à forger
CH712401A1 (de) * 2016-04-28 2017-10-31 Hatebur Umformmaschinen Ag Transportvorrichtung zum Umsetzen von Werkstücken in einer mindestens zwei Stufen umfassenden Bearbeitungseinrichtung.
US20170341126A1 (en) * 2016-05-26 2017-11-30 Daido Steel Co., Ltd. Transfer device of multistage forging press machine
EP3524371A1 (fr) * 2018-02-12 2019-08-14 Fagor Arrasate, S.Coop. Système et procédé de transport de pièces à usiner dans des machines de formage

Also Published As

Publication number Publication date
PL3991874T3 (pl) 2023-11-27
EP3991874B1 (fr) 2023-06-28
IT202000025795A1 (it) 2022-04-30
ES2951497T3 (es) 2023-10-23

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