EP0934784A1 - Zuführvorrichtung für Band aus Metall - Google Patents

Zuführvorrichtung für Band aus Metall Download PDF

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Publication number
EP0934784A1
EP0934784A1 EP99101302A EP99101302A EP0934784A1 EP 0934784 A1 EP0934784 A1 EP 0934784A1 EP 99101302 A EP99101302 A EP 99101302A EP 99101302 A EP99101302 A EP 99101302A EP 0934784 A1 EP0934784 A1 EP 0934784A1
Authority
EP
European Patent Office
Prior art keywords
strip
feeder
flap
metal strip
bed
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Withdrawn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
EP99101302A
Other languages
English (en)
French (fr)
Inventor
Sergio Dallan
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.)
Dallan SRL
Original Assignee
Dallan SRL
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 Dallan SRL filed Critical Dallan SRL
Publication of EP0934784A1 publication Critical patent/EP0934784A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21D43/021—Control or correction devices in association with moving strips
    • B21D43/022—Loop-control
    • 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
    • B21D43/025—Fault detection, e.g. misfeed detection
    • 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
    • B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass

Definitions

  • This invention relates to an improved metal strip feeder.
  • Metal strip feeders are known for presses and those machines in general which carry out mechanical operations on a metal strip advanced between the tools of said machines.
  • a known type of feeder of pneumatic operation uses two clamps acting transversely on the strip to be advanced. One of these clamp is fixed, while the other is driven with reciprocating movement in a direction parallel to the longitudinal axis of the strip.
  • Another known type of feeder comprises at least one pair of counter-rotating rollers between which the metal strip is interposed.
  • An object of the invention is to eliminate these drawbacks by providing an improved feeder able to sense the presence of this arching and to consequently halt the machine.
  • the feeder according to the invention comprises a bed indicated overall by 2, on which there are mounted two longitudinal rails 4, 4' for guiding two slides 6, 6' on which two carriages 8, 8' are mounted.
  • Each of the carriages 8, 8' is provided with a threaded bush 10, 10' in which there engages a longitudinal rod 12, 12' provided along about one half of its length with a thread in one direction, and along the other half with a thread in the opposite direction.
  • the threaded rod 12 is supported by the bed 2 via a pair of supports 14, 14' applied to shoulders 15, 15', the support 14 supporting its right end, whereas its left end extends beyond the shoulder 15' to be coupled to the output shaft of a direct current electric motor 16, also mounted on the bed 2.
  • Each gripper 18, 18' comprises a fixed lower jaw rigid with the corresponding carriage 8, 8', and a movable upper jaw 20, 20' driven relative to the corresponding fixed jaw by a pair of pneumatic actuators 22 of vertical axis.
  • the movable jaw 20, 20' of each gripper 18, 18' comprises a plurality of aligned apertures housing corresponding grub screws 24, adjustable individually in their axial position relative to the seat housing them and consequently adjustable in the amount by which they project from the clamping surface of the jaw. This adjustment can be achieved for example by rotating the grub screw 24 and fixing it in the attained position by a locking nut 26.
  • each grub screw 24 is pointed to facilitate, as described hereinafter, its penetration into the metal strip 28 to be fed to a machine which is positioned downstream of the feeder according to the invention, and is not further described as it does not form part of this invention.
  • Each centering section comprises a pair of transverse guides 32, 32', ie positioned perpendicular to the guides 4, 4'. They guide two slides 34, 34' engaged on respective threaded rods 36, 36', which are coupled to the corresponding threaded rods of the other centering section by sprocket wheels 38 connected together by pairs of chains 40, 40' extending along the longitudinal edges of the bed 2 and covered together with the sprocket wheels 38 by a guard cover 42, 42'.
  • the threaded rods 36, 36' relative to one of the two centering sections 30, 30' extend beyond the respective sprocket wheel 38 and can be removably coupled to a handwheel 44, 44' for manual operation.
  • each slide 34 there is provided a longitudinal groove 44 facing the groove 44' of the facing slide 34' so as to cooperate with this in engaging the longitudinal edges of the strip and in guiding it in its advancement.
  • a traditional straightening station for the strip 28 ie a station comprising a pair of lower transverse rollers 48 on which the strip 28 rests, and an upper transverse roller 50 which presses the strip against the lower rollers with adjustable interference, to remove any curvature which the strip possesses if originating from the unwinding of a coil.
  • a safety device consisting of a lower plate 52 on which the strip 28 slides, and an upper plate 54 which is hinged to the bed 2 along its rear transverse edge and can hence pass from a position parallel to the lower plate 52 to a raised position, shown by dashed lines in Figure 2.
  • the feeder of the invention operates as follows:
  • each of the two threaded rods 36, 36' rigid with the handwheels 44, 44' has associated with it a counter for counting the revolutions through which the rod has passed.
  • the threaded rods 36, 36' can also be associated with stepping motors instead of with handwheels, so as to be able to undergo motorized operation controlled by a computer.
  • the grub screws 24 are adjusted. During this stage the grub screws of those jaw portions 20 directly involved in gripping the strip 28 are made to project to an extent sufficient to ensure that the points of the grub screws penetrate into the strip 28 sufficiently to securely clamp it. At the same time the grub screws of those jaw portions 20 not involved in gripping the strip are made to project to a greater extent to compensate for the strip thickness and to rest directly on the underlying jaw, to in all cases ensure perfect parallelism between the two jaws of each gripper independently of the position of the strip 28.
  • the feeder is ready to operate by the synchronized powering of the actuators of the two grippers 18, 18' and of the motor 16 which drives the threaded rod 12, in accordance with that described for example in European Patent EP-B1-0737115.
  • the advancement of the strip 28 proceeds on the basis of the operating sequence of the machine positioned downstream of the feeder: the strip 28 is made to advance gradually as and when the machine requires it for working, in which case the upper plate 54 rests on the strip 28 parallel to the lower plate 52 and the sensor 56. It remains constantly activated by the activator 58 and provides the enabling signal for line operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Advancing Webs (AREA)
  • Adhesive Tapes (AREA)
EP99101302A 1998-01-30 1999-01-25 Zuführvorrichtung für Band aus Metall Withdrawn EP0934784A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE980005 1998-01-30
IT1998VE000005A IT1306460B1 (it) 1998-01-30 1998-01-30 Alimentatore perfezionato di nastro di lamiera

Publications (1)

Publication Number Publication Date
EP0934784A1 true EP0934784A1 (de) 1999-08-11

Family

ID=11424333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99101302A Withdrawn EP0934784A1 (de) 1998-01-30 1999-01-25 Zuführvorrichtung für Band aus Metall

Country Status (2)

Country Link
EP (1) EP0934784A1 (de)
IT (1) IT1306460B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107442678A (zh) * 2017-08-07 2017-12-08 安徽信盟装备股份有限公司 一种用于防止成型机板料过量的上料装置
IT202200004682A1 (it) * 2022-03-11 2023-09-11 Polytech Lab S R L Stampo progressivo per la produzione di componenti metallici con triplo controllo di sicurezza

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109877244A (zh) * 2019-04-28 2019-06-14 台州半城暖通科技有限公司 一种加工冲压机械安全保护装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE461896C (de) * 1928-06-29 Groh C Vorrichtung zum selbsttaetigen Stillsetzen von Maschinen, welche bandfoermiges Material in periodischem Vorschub verarbeiten
EP0284217A1 (de) * 1987-02-27 1988-09-28 BARNES, Austen Bernard Funktionsstörungsdetektor
WO1995017984A1 (en) * 1993-12-30 1995-07-06 Dalcos S.R.L. Gripper feeder for metal strip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE461896C (de) * 1928-06-29 Groh C Vorrichtung zum selbsttaetigen Stillsetzen von Maschinen, welche bandfoermiges Material in periodischem Vorschub verarbeiten
EP0284217A1 (de) * 1987-02-27 1988-09-28 BARNES, Austen Bernard Funktionsstörungsdetektor
WO1995017984A1 (en) * 1993-12-30 1995-07-06 Dalcos S.R.L. Gripper feeder for metal strip

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107442678A (zh) * 2017-08-07 2017-12-08 安徽信盟装备股份有限公司 一种用于防止成型机板料过量的上料装置
IT202200004682A1 (it) * 2022-03-11 2023-09-11 Polytech Lab S R L Stampo progressivo per la produzione di componenti metallici con triplo controllo di sicurezza

Also Published As

Publication number Publication date
IT1306460B1 (it) 2001-06-11
ITVE980005A0 (it) 1998-01-30
ITVE980005A1 (it) 1999-07-30

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