EP0475048A1 - Vorrichtung zum Einziehen für eine Schneideinrichtung - Google Patents

Vorrichtung zum Einziehen für eine Schneideinrichtung Download PDF

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Publication number
EP0475048A1
EP0475048A1 EP91112678A EP91112678A EP0475048A1 EP 0475048 A1 EP0475048 A1 EP 0475048A1 EP 91112678 A EP91112678 A EP 91112678A EP 91112678 A EP91112678 A EP 91112678A EP 0475048 A1 EP0475048 A1 EP 0475048A1
Authority
EP
European Patent Office
Prior art keywords
assembly
shears
hereinbefore
sections
compartments
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Withdrawn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
EP91112678A
Other languages
English (en)
French (fr)
Inventor
Giorgio Del Fabro
Marcello Del Fabro
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.)
MEP Macchine Elettroniche Piegatrici SpA
Original Assignee
MEP Macchine Elettroniche Piegatrici SpA
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
Priority claimed from IT083473A external-priority patent/IT9083473A1/it
Priority claimed from IT08349190A external-priority patent/IT1244578B/it
Application filed by MEP Macchine Elettroniche Piegatrici SpA filed Critical MEP Macchine Elettroniche Piegatrici SpA
Publication of EP0475048A1 publication Critical patent/EP0475048A1/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Withdrawn legal-status Critical Current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
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/12—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by chains or belts
    • 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
    • B21D43/28—Associations of cutting devices therewith

Definitions

  • This invention concerns a drawing assembly for a shearing bench as set forth in the precharacterising part of the main claim.
  • the invention concerns a drawing assembly suitable to feed and position bars in cooperation with a shearing bench.
  • the shearing bench can be employed by itself as a completed machine or can be coupled to other units located upstream or downstream so as to obtain sections of a desired length which may be shaped and/or bent.
  • the sections which can be processed with this invention are advantageously, but not only, so-called reinforcement bars.
  • the state of the art includes drawing machines employing belts or straps and working with a vertical or horizontal axis.
  • An example is disclosed in FR-A-2.238.538, but the drawing machines of this type entail a plurality of drawbacks.
  • a first drawback is due to the fact that the belt drawing machines are equipped with hard rubber pads to draw the round bars to the required position. These pads become worn very quickly and, when worn, can no longer ensure accurate positioning of the bar to be cut to the required size nor correct, desired drawing action.
  • a second drawback consists in the fact that such types of belt drawing machines can only draw one bar at a time or can draw a plurality of bars provided that the bars are positioned side by side on the plane of the drawing belt.
  • the drawing assembly consists substantially of an upper unit and a lower unit able to move in coordination at the same time.
  • Both the units consist of an endless chain; these chains, upper and lower, are substantially identical, and both of them bear supports and face towards a common side.
  • the upper and lower units both move in one of the two directions of feed, as selected.
  • Thrust elements are fitted in a stationary or adjustable manner to supports of the chain of the upper unit, whereas partition elements are fitted in a stationary or adjustable manner to supports of the chain of the lower unit.
  • the thrust and partition elements may consist of a metal or plastic or another suitable material.
  • compartments are created between one partition element and the next, and the thrust elements are inserted into the compartments in a coherent manner.
  • the compartments have a width greater than the maximum diameter of the section to be lodged therein; the result of this is that, as the sections are inserted one on top of another, one section rests on one lateral wall while the successive section and also the previous section rest on the other lateral wall.
  • the range of widths can be identified as follows, for instance:
  • the bars are loaded into the compartments, where they are thrust vertically by the thrust elements, and being clamped in this way, are drawn in the direction of a shears so as to be sheared to the desired size.
  • One size is processed at a time.
  • Each upper support bears in a stationary or adjustable manner a plurality of thrust elements of various widths, which mate with respective compartments of various widths provided between one partition element and another; thus the compartments too have various widths coordinated with those of the corresponding thrust elements.
  • the compartments may have different or constant depths.
  • the drawing assembly according to the invention can draw a plurality of bars of the same size at the same time according to the height of the partition elements, the bars being positioned side by side on a plane normal to the direction of drawing, as indicated above.
  • the thrust on the bar or bars is kept constant by lifting means which act on the upper unit and/or on the lower unit.
  • Resilience is therefore provided by lifting means which, by rising and descending according to the number of bars loaded and to the diameter of the bars, keep a constant thrust of the thrust elements against the bars, thus making possible a uniform drawing and accurate positioning for the shearing.
  • Alignment means anchored to the base of the drawing assembly are included to displace the drawing assembly horizontally to and fro in relation to the shears. These horizontal displacements are necessary to align the bars with the shears according to the compartment (wider or less wide in relation to the diameter of the bar) in which the bars are loaded.
  • thrust elements can cooperate perfectly with the compartments produced by the partition elements and so that there is no reciprocal movement
  • guides are included which cooperate with the chains and keep them aligned, at least in the segment where the chains are opposite to each other.
  • These guides may be stationary or adjustable or may exert a resilient thrust towards the bars.
  • Guide rolls included in the supports enter the guides advantageously before the thrust elements begin thrusting the bars.
  • shears are positioned at the entry end and the exit end of the drawing assembly.
  • the shears too comprise compartments and cut with a sideways movement.
  • the shears at the entry end comprises upwardly open compartments
  • the shears at the exit end comprises downwardly open compartments so as to assist removal and the fall of undersized portions and/or wastes.
  • the two shears are fitted to a rotary support able to position the shears with their compartments opened upwards or downwards as required for the shearing operation.
  • a drawing assembly 10 having a horizontal axis and anchored to a base 14 is positioned between two shears, a first shears 11 upstream of the drawing assembly 10 and a second shears 12 downstream of the drawing assembly 10.
  • the shears 11-12 are shown diagrammatically.
  • the bars can move along one direction of feed or the other, as required.
  • the drawing assembly 10 then causes the necessary movements of the bar for the required shearing of the leading and trailing ends of the bar according to the teaching disclosed, for instance, in patent application No.IT 83321 A/89 in the name of the present applicant.
  • the bars are removed and the sheared ends are discharged towards an expulsion system 16 operated by a cylinder-piston actuator 15; the bars are conveyed, for instance, on a removal roller conveyor 17.
  • Fig.2 shows that the drawing assembly 10 consists of an upper unit 18 and lower unit 19.
  • the upper unit 18 consists of a chain 20 bearing supports 21, to which are fitted thrust elements 22 having various widths.
  • the lower unit 19 in turn consists of a chain 23 bearing supports 24, to which are fitted partition elements 25 that form compartments 26 having widths coordinated with the widths of the corresponding thrust elements 22.
  • the upper and lower guides 30-31 guide the thrust elements 22 and partition elements 25 correctly towards and parallel to each other, so that the thrust elements 22 become positioned correctly within the compartments 26 and remain substantially fixed thereto.
  • the bars become positioned within one of the compartments 26 according to their diameter and, being thrust in a direction normal to themselves by the thrust element 22 coinciding with the compartment 26 in which they are located, become positioned alternately in contact with one wall and the other wall of their compartment 26 and are drawn in the pre-selected direction of feed.
  • a lifting cylinder/piston actuator 32 is provided which regulates the thrust of the thrust element 22 against the bars according to the number of bars loaded and keeps that thrust constant so as to provide a uniform, accurate drawing action.
  • the drawing assembly 10 is equipped with an alignment cylinder-piston actuator 33, which is anchored to the base 14 of the assembly 10 and provides horizontal displacements.
  • the first and second shears 11-12 in this case consist of a stationary blade 37a and movable blade 37b; the blades 37a-37b are fitted to a rotary cradle 34, which can be positioned at two positions at 180 to each other by a drive unit 35.
  • the blades 37a-37b too comprise compartments 26 coordinated with the compartments 26 of the drawing assembly 10, so that the bars become positioned in these compartments too as in those of the drawing assembly 10.
  • the blades are a stationary blade 37a and a movable blade 37b.
  • the movable blade 37b possesses advantageously, in the direction of feed, a development 36 diverging from the vertical downwards towards the bottom of the compartment 26 so as to assist the shearing action.
  • both the blades 37a and 37b may be movable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
EP91112678A 1990-09-12 1991-07-27 Vorrichtung zum Einziehen für eine Schneideinrichtung Withdrawn EP0475048A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
IT8347390 1990-09-12
IT083473A IT9083473A1 (it) 1990-09-12 1990-09-12 Gruppo di traino per banco di taglio
IT08349190A IT1244578B (it) 1990-10-10 1990-10-10 Gruppo di traino per banco di taglio
IT8349190 1990-10-10

Publications (1)

Publication Number Publication Date
EP0475048A1 true EP0475048A1 (de) 1992-03-18

Family

ID=26330089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112678A Withdrawn EP0475048A1 (de) 1990-09-12 1991-07-27 Vorrichtung zum Einziehen für eine Schneideinrichtung

Country Status (3)

Country Link
EP (1) EP0475048A1 (de)
JP (1) JPH07328836A (de)
CA (1) CA2050718A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010040820A1 (en) * 2008-10-10 2010-04-15 M.E.P. Macchine Elettroniche Piegatrici Spa Feed device for metal bars, and relative feed method
ITUD20120173A1 (it) * 2012-10-16 2014-04-17 Ocn S P A "dispositivo di allineamento"

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134487A1 (de) * 1968-02-28 1972-12-08 Morgan Construction Co
US3797338A (en) * 1972-04-07 1974-03-19 M Molnar Machine for mass production of both medium and short lengths of tubing
US3833979A (en) * 1973-08-27 1974-09-10 R Seavey Feed and trim apparatus
FR2238538A1 (de) * 1973-07-23 1975-02-21 Danieli Off Mecc
DE2503466A1 (de) * 1975-01-24 1976-07-29 Mannesmann Roehren Werke Ag Vorrichtung zum kontinuierlichen saegen von profilen
DE2545926A1 (de) * 1975-10-14 1977-05-05 Kocks Gmbh Friedrich Saege zum unterteilen von stangenfoermigem gut
FR2369030A1 (fr) * 1976-10-29 1978-05-26 Earle Sa Installation pour mettre en forme et finir des tubes metalliques
DE2807702A1 (de) * 1978-02-23 1979-09-06 Peddinghaus Carl Ullrich Dr Vorrichtung zum greifen, halten und foerdern von stabfoermigem material
DE3300940C1 (de) * 1983-01-13 1984-04-05 Peddinghaus, Carl Ullrich, Dr., 5600 Wuppertal Vorrichtung zur Zuführung von Betonstahlstäben, insbesondere solchen aus Rippenstahl, zu einer Bearbeitungsmaschine
DE3402568A1 (de) * 1984-01-26 1985-08-08 Peddinghaus, Carl Ullrich, Dr., 5600 Wuppertal Vorrichtung zur zufuehrung von betonstahlstaeben zu einer bearbeitungsmaschine

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2134487A1 (de) * 1968-02-28 1972-12-08 Morgan Construction Co
US3797338A (en) * 1972-04-07 1974-03-19 M Molnar Machine for mass production of both medium and short lengths of tubing
FR2238538A1 (de) * 1973-07-23 1975-02-21 Danieli Off Mecc
US3833979A (en) * 1973-08-27 1974-09-10 R Seavey Feed and trim apparatus
DE2503466A1 (de) * 1975-01-24 1976-07-29 Mannesmann Roehren Werke Ag Vorrichtung zum kontinuierlichen saegen von profilen
DE2545926A1 (de) * 1975-10-14 1977-05-05 Kocks Gmbh Friedrich Saege zum unterteilen von stangenfoermigem gut
FR2369030A1 (fr) * 1976-10-29 1978-05-26 Earle Sa Installation pour mettre en forme et finir des tubes metalliques
DE2807702A1 (de) * 1978-02-23 1979-09-06 Peddinghaus Carl Ullrich Dr Vorrichtung zum greifen, halten und foerdern von stabfoermigem material
DE3300940C1 (de) * 1983-01-13 1984-04-05 Peddinghaus, Carl Ullrich, Dr., 5600 Wuppertal Vorrichtung zur Zuführung von Betonstahlstäben, insbesondere solchen aus Rippenstahl, zu einer Bearbeitungsmaschine
DE3402568A1 (de) * 1984-01-26 1985-08-08 Peddinghaus, Carl Ullrich, Dr., 5600 Wuppertal Vorrichtung zur zufuehrung von betonstahlstaeben zu einer bearbeitungsmaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010040820A1 (en) * 2008-10-10 2010-04-15 M.E.P. Macchine Elettroniche Piegatrici Spa Feed device for metal bars, and relative feed method
ITUD20120173A1 (it) * 2012-10-16 2014-04-17 Ocn S P A "dispositivo di allineamento"

Also Published As

Publication number Publication date
JPH07328836A (ja) 1995-12-19
CA2050718A1 (en) 1992-03-13

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