EP0876862A1 - A workpiece feeder for a press, with an integrated feed mechanism - Google Patents

A workpiece feeder for a press, with an integrated feed mechanism Download PDF

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Publication number
EP0876862A1
EP0876862A1 EP98500075A EP98500075A EP0876862A1 EP 0876862 A1 EP0876862 A1 EP 0876862A1 EP 98500075 A EP98500075 A EP 98500075A EP 98500075 A EP98500075 A EP 98500075A EP 0876862 A1 EP0876862 A1 EP 0876862A1
Authority
EP
European Patent Office
Prior art keywords
carriage
press
pieces
feeder
workpiece holder
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
EP98500075A
Other languages
German (de)
French (fr)
Other versions
EP0876862B1 (en
Inventor
Pedro Aguirrezabal Ondarra
Bern Gillet
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.)
Fagor Electrodomesticos SCL
Original Assignee
Fagor Electrodomesticos SCL
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 Fagor Electrodomesticos SCL filed Critical Fagor Electrodomesticos SCL
Publication of EP0876862A1 publication Critical patent/EP0876862A1/en
Application granted granted Critical
Publication of EP0876862B1 publication Critical patent/EP0876862B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D43/04—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 device for feeding metal workpieces into a press by means of a mobile feed carriage and a piece-holder coupled to said carriage to attach the pieces by means of pincers, the feeder being fitted with mechanical transmission devices for moving the pieces to the press die.
  • GB-1415379-A describes a piece feeder for transferring pieces to be formed in a press, comprising a structure with rails for the horizontal displacement of a feed carriage and an arm with a set of pincers to hold the pieces on the carriage, and a mechanism to move the arm vertically to the carriage and raise the pieces at the end of the carriage run.
  • DE-4200923-A describes a linear driver on two axes by means of a motor which turns a drive shaft with a gear wheel attached to it which meshes with a drive belt to move a displaceable carriage orthogonally to the direction of the shaft, in which the drive motor is secured in a structure.
  • Said linear drive has two moveable carriages and conveys the pieces in the press only on a horizontal plane.
  • the object of the invention is a feeder of different sized metal workpieces in a forming press, where the press plain is horizontal and is located at a given distance from the floor, having the feeder to lift the pieces to the press plain and then, move them toward the corresponding die, as it is defined in claim 1.
  • the feeder according to the invention has the advantage that it incorporates an only carriage, which lifts the workpiece holder to the level of the press plain, and so saving in the economic cost of the feeder.
  • the carriage incorporates the feed drive so as to provide a compact construction taking up a small space inside the press frame.
  • the sole carriage, of an elongated design in the direction orthogonal to the travel direction of the workpieces, and the reduced weight of the feeder components make it possible to cut the cost of the motor and the lifting carriage drive mechanism, the drive for the holder feed motion and the mechanism for opening and closing the piece holder tool.
  • the last two components are constructed independently so that the feed drive does not have to move the tool opening/closing mechanism, which is located adjacent to the single carriage so as not to take up additional space in the press, but supported by a beam of the press.
  • the feeder uses a single motor for the motion of the piece holder, the motor weight borne by the carriage is less than fifteen per cent of the total carriage weight, and the carriage is driven by a lifting device fixed on the press structure.
  • FIG. 1 is a side elevation of the workpiece feeder according to the invention.
  • FIG. 2 is a plan view of the workpiece feeder in Figure 1.
  • the feeder 1 of the pieces P is supported by the support beam 2, which is held on the lateral columns 3 of the press, and transfers the workpieces P to the press plain 7 where the dies are located.
  • the feeder 1 comprises the lifting mechanism 4 driven by the motor 4', the carriage 6 raised by the mechanism 4 in the direction Z to the level of the die matrix on the plain 7 of the press, the workpiece holder 14 in the form of a horizontal frame where the pieces p are attached, the drive 9 supported on the carriage 6 for the movement of the holding bars 14 in the feed direction X of the pieces P , and the mechanism 17 to open/close the workpiece holder bar 14.
  • the support beam 2 is attached at a height greater than the press plain 7, and the device 4 and its motor 4' lift the carriage 6 in direction Z after picking up a piece P formed in a die, feeding it forward and down to place it in the following die, with which the piece holding bars 14 are also lifted.
  • the lifting device 4 has a shaft 20 with two gears 21 secured to it which drive the racks 22 attached to the vertical side 6 a of the carriage.
  • the workpiece holder comprises two bars 14 arranged parallel in direction X to form a horizontal frame where the pieces P are each secured by two pairs of pincers 16.
  • the bars 14 close or open the separation between them in direction Y according to the size of the pieces P transferred to the press.
  • the carriage 6 is elongated in direction Y and is L-shaped in cross-section.
  • the drive 9 for advancing the holding bars 14 is supported on the carriage 6, and comprises the feed motor 9', the rotary shaft 11 transmitting the feed, the two gear drive wheels 12 attached to the ends of the shaft 11, and the two transmission belts 13 moving the holding bars in direction X.
  • Said transmission belts 13 are open and are coupled to each holding bar 14 by a pair of two-way rotary rollers. Each end 23 of the belt 13 is fixed to the associated bar 14 on each side of the carriage 6.
  • the workpiece holder 14 is coupled to the carriage 6 by two members 10 extended under the side 6 b of the carriage in direction X, one on each bar 14.
  • the mechanism 17 for opening/closing the frame of the holding bars 14 is supported on beam 2, and comprises the motor 17' and the closed transmission belt 19 which runs in both directions of axis Y between the two bars 14.
  • Each coupling member 10 has two guided skids 24 under the side 6 b of the carriage, which slide in direction Y guided under the carriage 6, moving the bars 14 for their opening/closing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

The workpiece feeder (1) is installed on a forming press with a horizontal plain (7) which is situated at a given distance (Z) from the floor. The feeder (1) comprises a sole carriage (6) for lifting the workpiece holder (14, 16) which also incorporates the feeder mechanism (9), to elevate the pieces (p) in direction "Z" and feed them in direction "X". The workpiece holder (14, 16) can be extended in direction "Y" for different pieces (p) by means of a motor mechanism (17) which is independent of the feeder mechanism (9). Only said feeder mechanism (9) is supported on the carriage (6) which is driven by a lifting device (4) secured to the press structure (2, 3).

Description

The present invention relates to a device for feeding metal workpieces into a press by means of a mobile feed carriage and a piece-holder coupled to said carriage to attach the pieces by means of pincers, the feeder being fitted with mechanical transmission devices for moving the pieces to the press die.
Prior Art
GB-1415379-A describes a piece feeder for transferring pieces to be formed in a press, comprising a structure with rails for the horizontal displacement of a feed carriage and an arm with a set of pincers to hold the pieces on the carriage, and a mechanism to move the arm vertically to the carriage and raise the pieces at the end of the carriage run.
DE-4200923-A describes a linear driver on two axes by means of a motor which turns a drive shaft with a gear wheel attached to it which meshes with a drive belt to move a displaceable carriage orthogonally to the direction of the shaft, in which the drive motor is secured in a structure.
Said linear drive has two moveable carriages and conveys the pieces in the press only on a horizontal plane.
Disclosure of the Invention
The object of the invention is a feeder of different sized metal workpieces in a forming press, where the press plain is horizontal and is located at a given distance from the floor, having the feeder to lift the pieces to the press plain and then, move them toward the corresponding die, as it is defined in claim 1.
The feeder according to the invention has the advantage that it incorporates an only carriage, which lifts the workpiece holder to the level of the press plain, and so saving in the economic cost of the feeder. The carriage incorporates the feed drive so as to provide a compact construction taking up a small space inside the press frame. The sole carriage, of an elongated design in the direction orthogonal to the travel direction of the workpieces, and the reduced weight of the feeder components make it possible to cut the cost of the motor and the lifting carriage drive mechanism, the drive for the holder feed motion and the mechanism for opening and closing the piece holder tool. The last two components are constructed independently so that the feed drive does not have to move the tool opening/closing mechanism, which is located adjacent to the single carriage so as not to take up additional space in the press, but supported by a beam of the press.
The feeder uses a single motor for the motion of the piece holder, the motor weight borne by the carriage is less than fifteen per cent of the total carriage weight, and the carriage is driven by a lifting device fixed on the press structure.
Description of the drawings
FIG. 1 is a side elevation of the workpiece feeder according to the invention.
FIG. 2 is a plan view of the workpiece feeder in Figure 1.
Detailed description of the invention
With reference to figures 1 and 2 showing the preferred embodiment of the invention, the feeder 1 of the pieces P is supported by the support beam 2, which is held on the lateral columns 3 of the press, and transfers the workpieces P to the press plain 7 where the dies are located.
The feeder 1 comprises the lifting mechanism 4 driven by the motor 4', the carriage 6 raised by the mechanism 4 in the direction Z to the level of the die matrix on the plain 7 of the press, the workpiece holder 14 in the form of a horizontal frame where the pieces p are attached, the drive 9 supported on the carriage 6 for the movement of the holding bars 14 in the feed direction X of the pieces P, and the mechanism 17 to open/close the workpiece holder bar 14.
The support beam 2 is attached at a height greater than the press plain 7, and the device 4 and its motor 4' lift the carriage 6 in direction Z after picking up a piece P formed in a die, feeding it forward and down to place it in the following die, with which the piece holding bars 14 are also lifted. The lifting device 4 has a shaft 20 with two gears 21 secured to it which drive the racks 22 attached to the vertical side 6a of the carriage.
The workpiece holder comprises two bars 14 arranged parallel in direction X to form a horizontal frame where the pieces P are each secured by two pairs of pincers 16. The bars 14 close or open the separation between them in direction Y according to the size of the pieces P transferred to the press.
The carriage 6 is elongated in direction Y and is L-shaped in cross-section. The drive 9 for advancing the holding bars 14 is supported on the carriage 6, and comprises the feed motor 9', the rotary shaft 11 transmitting the feed, the two gear drive wheels 12 attached to the ends of the shaft 11, and the two transmission belts 13 moving the holding bars in direction X. Said transmission belts 13 are open and are coupled to each holding bar 14 by a pair of two-way rotary rollers. Each end 23 of the belt 13 is fixed to the associated bar 14 on each side of the carriage 6.
The workpiece holder 14 is coupled to the carriage 6 by two members 10 extended under the side 6b of the carriage in direction X, one on each bar 14. The mechanism 17 for opening/closing the frame of the holding bars 14 is supported on beam 2, and comprises the motor 17' and the closed transmission belt 19 which runs in both directions of axis Y between the two bars 14. Each coupling member 10 has two guided skids 24 under the side 6b of the carriage, which slide in direction Y guided under the carriage 6, moving the bars 14 for their opening/closing.

Claims (2)

  1. A workpiece feeder for a press, being supported on the structure (2,3) of the press, wherein the transfer directions for the pieces (P) are "Z" and "X", comprising a workpiece holder (14, 16) arranged on a horizontal plane XY parallel to the press plain (7), and being extensible in direction "Y" to grip the different sized pieces (P), a mechanism (17) to open and close the workpiece holder (14, 16), a drive (9) provided with a motor (9') to feed the pieces (P) in the advancing direction "X", a mobile carriage (6) cooperating to lift the workpiece holder (14, 16) in the vertical direction "Z", and driven by a lifting device (4) and its motor (4'), characterised in that said mobile carriage (6) being the sole carriage of the workpiece feeder (1), raises the workpiece holder (14, 16), the lifting device (4) is secured to the structure (2, 3) of the press, the drive (9) to feed the pieces (p) is incorporated into the carriage (6), and the workpiece holder (14,16) is coupled to the carriage (6) by at least one intermediate member (10), which is driven in said direction "Y" by a motorized mechanism (17) supported on a beam (2) of the press structure.
  2. The feeder of claim 1, wherein the elevator carriage (6) is elongated in direction "Y", and the workpiece holder (14, 16) is formed by two bars (14) securing the pieces (p) spaced and parallel transversally under the two ends of the elevator carriage (6), and each bar (14) individually moved by the feeding drive (9) through a respective open transmission belt (13) and two pairs of rollers (16).
EP19980500075 1997-04-30 1998-03-24 Press with a workpiece feeder, with an integrated feed mechanism Expired - Lifetime EP0876862B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES9700943A ES2150331B1 (en) 1997-04-30 1997-04-30 PARTS FEEDER FOR A PRESS WITH INTEGRATED ADVANCED MECHANISM.
ES9700943 1997-04-30

Publications (2)

Publication Number Publication Date
EP0876862A1 true EP0876862A1 (en) 1998-11-11
EP0876862B1 EP0876862B1 (en) 2001-05-02

Family

ID=8299159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980500075 Expired - Lifetime EP0876862B1 (en) 1997-04-30 1998-03-24 Press with a workpiece feeder, with an integrated feed mechanism

Country Status (3)

Country Link
EP (1) EP0876862B1 (en)
DE (1) DE69800742T2 (en)
ES (1) ES2150331B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2174659A1 (en) * 1999-02-12 2002-11-01 Fagor S Coop Transfer with pincers positioning in a multi-step press.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006041281B4 (en) * 2006-09-02 2008-09-11 H & T Produktions Technologie Gmbh Transfer device for processing machines, in particular presses

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB937835A (en) * 1959-06-29 1963-09-25 Chausson Usines Sa Improvements in or relating to apparatus for transferring work parts between two work points
GB949682A (en) * 1957-09-14 1964-02-19 Berthold Schlatterer A device for feeding workpieces to a press
FR2169417A1 (en) * 1972-01-27 1973-09-07 Norda Spa
GB2006077A (en) * 1977-10-21 1979-05-02 Schuler Gmbh L Workpiece conveyor device
GB2118129A (en) * 1982-04-08 1983-10-26 Aida Eng Ltd Conveying device for press work materials
DE4200923A1 (en) * 1991-01-23 1992-08-06 Wilfried Strothmann Two axis linear driver with low moving weights - has second carriage movable on first carriage perpendicularly to its direction of motion, motor and drive belt for each carriage
DE3233428C1 (en) * 1982-09-09 1993-04-29 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Feed and removal device, especially on presses

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5483876A (en) * 1993-12-21 1996-01-16 Trantek, Incorporated Workpart transfer mechanism for stamping press

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB949682A (en) * 1957-09-14 1964-02-19 Berthold Schlatterer A device for feeding workpieces to a press
GB937835A (en) * 1959-06-29 1963-09-25 Chausson Usines Sa Improvements in or relating to apparatus for transferring work parts between two work points
FR2169417A1 (en) * 1972-01-27 1973-09-07 Norda Spa
GB1415379A (en) * 1972-01-27 1975-11-26 Norda Spa Automatic device for feeding workpieces onto machines
GB2006077A (en) * 1977-10-21 1979-05-02 Schuler Gmbh L Workpiece conveyor device
GB2118129A (en) * 1982-04-08 1983-10-26 Aida Eng Ltd Conveying device for press work materials
DE3233428C1 (en) * 1982-09-09 1993-04-29 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Feed and removal device, especially on presses
DE4200923A1 (en) * 1991-01-23 1992-08-06 Wilfried Strothmann Two axis linear driver with low moving weights - has second carriage movable on first carriage perpendicularly to its direction of motion, motor and drive belt for each carriage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2174659A1 (en) * 1999-02-12 2002-11-01 Fagor S Coop Transfer with pincers positioning in a multi-step press.

Also Published As

Publication number Publication date
EP0876862B1 (en) 2001-05-02
DE69800742D1 (en) 2001-06-07
ES2150331A1 (en) 2000-11-16
ES2150331B1 (en) 2001-04-01
DE69800742T2 (en) 2002-05-29

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