EP1291141B1 - Improved water jet cutting device - Google Patents

Improved water jet cutting device Download PDF

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Publication number
EP1291141B1
EP1291141B1 EP01919461A EP01919461A EP1291141B1 EP 1291141 B1 EP1291141 B1 EP 1291141B1 EP 01919461 A EP01919461 A EP 01919461A EP 01919461 A EP01919461 A EP 01919461A EP 1291141 B1 EP1291141 B1 EP 1291141B1
Authority
EP
European Patent Office
Prior art keywords
collector
conduit
cutting device
cutting
tables
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.)
Expired - Lifetime
Application number
EP01919461A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1291141A1 (en
Inventor
Miquel Seriola Rodas
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.)
Ingenieria de Aplicaciones SA
Original Assignee
Ingenieria de Aplicaciones SA
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 Ingenieria de Aplicaciones SA filed Critical Ingenieria de Aplicaciones SA
Publication of EP1291141A1 publication Critical patent/EP1291141A1/en
Application granted granted Critical
Publication of EP1291141B1 publication Critical patent/EP1291141B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/018—Holding the work by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/20—Cutting beds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
    • B26D2007/0056—Rotating a pile of sheets in the plane of the sheets

Definitions

  • Typical materials in waterjet cutting include paper, corrugated paperboard, plastics, foam materials, sealing materials, etc (see for example DE-U-8813449).
  • Waterjet cutting provides many advantages: health damaging dust is not produced during cutting, there are no thermal effects on the cutting surface, the existing return forces are low, mechanical load on the materials is very reduced, there are no deformations on the material surface, cutting can be performed on any part of the material and it produces a clear cut with a burr-free finishing removing subsequent mechanizing operations on the pieces, materials are no heated up, waterjet cutting allows to cut workstocks having a thickness greater than those cut by laser with a similar finishing and it allows to cut materials that it would not be possible by using other cutting systems, as for example aluminium or glass.
  • Said cutting unit comprises, among other parts, a propelling and intensifying unit provided with a pressure pump acting as a water pressure multiplying device by means of a motor controlled by integrated circuit systems adjusting all the system functions. Water is pressurized and forced to pass through a reduced diameter hole to increase output speed twice and up to three times the speed of sound that, in terms of kinetic energy, it is enough to cut a wide range of materials of a natural or synthetic origin as previously disclosed.
  • the unit also includes a frame inside of which there is arranged a first working or cutting table on which a projecting nozzle is acting supplying the water jet, and a second working table or processing workstock table. Provision of the two tables allow that, whilst one is working on a workstock, it is possible to process a new workstock on the other table therefore reducing down times in the cutting operation.
  • the main object of the present invention is to provide an improved waterjet cutting unit including improved drawing means to draw the cut material that, in turn, cooperate in retaining the workstock being cut on the cutting table of the unit in position.
  • This object can be achieved by a device according to claim 1.
  • the improved waterjet cutting unit of the present invention basically comprises two working tables: a cutting table provided inside a cab and onto which a nozzle projects high speed water on the workstock that is arranged on said table; and a processing table disposed outside of the cab and that is suitably adapted to put thereon the piece that is to be subsequently cut.
  • the two working tables of the unit of the present invention are allowed to rotate relative to the cab to change the positions that they are taking up, i.e. when cutting operation has finished, both tables are swapping their positions in such a way that the cutting table is away from the cab and the processing table is now inside the cab (this being now a cutting table) to start cutting a new piece.
  • the main feature of the unit of the present invention is that both the cutting table and the processing table are provided, at the lower part thereof, with a drawing conduit connected to a water and scale material collector conduit arranged at the lower part of the unit, that is to say, under the conduits of both tables.
  • each table is provided with a door preferably actuated by a cylinder.
  • Said door of each conduit has the purpose of enabling or disabling air passing so as to retain the workstock in position on the table surface or release it therefrom and, in turn, to void the pieces already cut.
  • the working tables are provided with respective actuators acting on the corresponding doors of the air conduits in the tables.
  • a sensor outputting a signal according to the position where said doors are in order to block rotation of both tables if the doors are not opened.
  • the above mentioned rotary collector connects the conduits of each table channelling the air passage to the collector conduit.
  • Said rotary collector essentially comprises two cylindrical bodies: an upper cylindrical body and a lower cylindrical body.
  • the upper cylindrical body is allowed to rotate relative to the lower cylindrical body and it is provided with a first opening for the air passage from the cutting table to the collector lower body and a second opening for the air passage from the processing table to said collector lower body.
  • the lower body is provided with an opening allowing air passage to the collector conduit.
  • the rotary collector is provided with cleaning scoops radially arranged therein and serving the purpose of preventing solid material from being stuck to the walls as it is drawn into the collector conduit.
  • a basin intended to collect the scale material and there is also provided a drawing pump to draw the cutting water.
  • the present invention further provides access trapdoors in the collector conduit in order to facilitate cleaning and maintenance operations.
  • the cutting table and the processing table of the cutting unit of the present invention are provided with respective sloped trays at the lower part thereof. Said trays allows to properly collect the water and the scale material produced during the cutting of the piece and they convey them to the respective air drawing conduit.
  • the waterjet cutting unit shown by way of a no limitative example in figs. 1, 2 and 3 is based upon high speed water jet projection through a water injection nozzle (1) fitted on a robot (2) for cutting pieces made, for example, of paperboard, plastics, foam, aluminium, etc.
  • the robot (2) acts on a cutting table (3) provided inside a cab (4) shown in fig. 2 of the drawings enclosed in the present specification.
  • the cutting table (3) is arranged on centring members (5) which are fitted in such a way that they can move upwards in the frame of the unit and the piece to be cut (6) is disposed thereon.
  • the cutting table (3) is attached to a processing table (7) located outside the cab (4) on which the piece (8) which is to be subsequently cut by the water jet projected by the robot (2) is disposed.
  • the cutting table (3) and the processing table (7) are rotary fitted in the frame of the cab (4) and they are allowed to rotate relative to the axis (9) shown in fig. 1. Rotation of the tables (3, 7) allows to eliminate down times in the cutting process since when cutting of the piece (6) has been finished, the other piece (8) that is being processed for the cutting thereof on the table (7), enters the cab (4), whilst the table (3) is away from the cab (4) ready to receive a new piece (8) to be processed to cut.
  • the cutting table (3) and the processing table (7) are provided, at the lower part thereof, with respective air drawing conduits (10, 11) leading to a water and scale material collector conduit (12). Drawing of such materials is carried out by means of an air drawing main conduit (13) having, at an end thereof, an extractor fan (14). Said air drawing main conduit (13) is disposed, like the collector conduit (12), at the lower part of the unit in order to obtain a high drawing performance avoiding clogging of the scale material which usually forms a paste on mixing with cutting water.
  • This is made possible by virtue of, as it can be seen from figures, there are no air advancement vertical sections which could complicate dragging of material.
  • the drawing sections are very short, i.e. the path the air follows from, for example, the cutting table (3) to the collector conduit (12), is very short, therefore reducing the possibility that the air flow becomes hindered by scale materials and flow thereof becomes hampered by them through the several conduits of the unit.
  • each conduit (10, 11) of both working tables (3, 9) are connected to the collector conduit (12) by means of a rotary collector (15) comprising an upper cylindrical body (16) and a lower cylindrical body (17).
  • the upper cylindrical body (16) is allowed to rotate relative to the lower cylindrical body (17) and it is provided with a first opening (18) for the air passage from the cutting table (3) to the lower body (17) of the collector (15), and with a second opening (19) for the air passage from the processing table (7) to the lower body (17) of the collector (15).
  • the lower cylindrical body (17) is provided, in turn, with an opening (20) through which air passes to the collector conduit (12).
  • the conduits (10, 11) of each table (3, 7) are provided with doors (21, 22) actuated by cylinders (21a, 22a).
  • the doors adjust the air passage through the conduits (10, 11). If for example the door (21) of the conduit (10) of the cutting table (3) is in the open position, air is then enabled to flow from the table (3) to the conduit (12) collecting the pieces or remnants and the water produced during cutting and, at the same time, it causes a negative pressure capable to retain the piece (6) in position preventing it from being moved during the cutting operation. Closing of the door (21) allows said piece (6) to be released from the cutting table (3). On the other hand, air flow through the conduit (11) of the processing table (7) as the door (22) is in the open position allows to hold the piece (8) that is being processed to be subsequently cut.
  • Coordination between the cutting operation carried out by the robot (2) and rotation of the tables (3, 7) around the axis (9) is performed by providing a sensor outputting a signal according to the position where said doors (21, 22) of the conduits (10, 11) are in such a way that rotation of both tables (3, 7) is not possible until said doors (21, 22) are opened.
  • the collector conduit (12) comprises, at the end thereof, a washout comprising a reservoir (23) where scale material is collected, and there is also provided a cutting water drawing pump.
  • the cutting table (3) and the processing table (7) are provided with respective sloped trays (24, 25) at the lower part thereof intended to collect the water and the scale material produced during the cutting of the piece (6) and to convey them into the collector conduit (12).
  • Fig. 3 shows how the upper part of said collector conduit (12) is provided with a number of openings (26) intended to gain access therein to facilitate cleaning and maintenance operations of the unit.
  • the drawing air flow needed for retaining the pieces to be cut (6, 8) in position and for voiding the bits of cut material is obtained from the fan (14) causing a drawing flow through section (27) of the collector conduit.
  • a depression is produced in the access opening (28) of the fan (14) due to the air flow in the direction shown by arrows in fig. 2 due to the conical configuration of the body (29) of the fan (14), in such a way that the air inside the body (29) of the fan (14) follows a rising swirl path passing through a grid (30) to the output conduit (31) connected to the extractor fan (32).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Sawing (AREA)
  • Laser Beam Processing (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Comprende una mesa de corte (3) y una mesa de preparación (7) giratorias respecto a una cabina (4). Una boquilla (1) proyecta agua a gran presión sobre la pieza a cortar (6) dispuesta encima de la mesa (3). Las mesas (3, 7) incluyen un conducto inferior de succión (10, 11) conectado a un conducto colector (12) mediante un colector giratorio (15) que une las salidas de los mismos e incluyen compuertas (21, 22) que regulan el paso de aire para retener la pieza (6, 8) en la superficie de la mesa (3, 7) o liberarla de la misma. Un detector emite una señal de la posición de las compuertas (21, 22) impidiendo el giro de las mesas (3, 7) si las compuertas (21, 22) no se encuentran abiertas.
EP01919461A 2000-05-26 2001-04-09 Improved water jet cutting device Expired - Lifetime EP1291141B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES200001338A ES2165323B1 (es) 2000-05-26 2000-05-26 Equipo perfeccionado de corte por chorro de agua.
ES200001338 2000-05-26
PCT/ES2001/000140 WO2001089777A1 (es) 2000-05-26 2001-04-09 Equipo perfeccionado de corte por chorro de agua

Publications (2)

Publication Number Publication Date
EP1291141A1 EP1291141A1 (en) 2003-03-12
EP1291141B1 true EP1291141B1 (en) 2005-11-02

Family

ID=8493674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01919461A Expired - Lifetime EP1291141B1 (en) 2000-05-26 2001-04-09 Improved water jet cutting device

Country Status (4)

Country Link
EP (1) EP1291141B1 (es)
DE (1) DE60114616D1 (es)
ES (2) ES2165323B1 (es)
WO (1) WO2001089777A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2222798B1 (es) * 2003-04-30 2005-12-16 Metronics Technologies, S.L "sistema de movimiento de un producto alimenticio en una mesa de corte o similar".
US20050056288A1 (en) * 2003-09-11 2005-03-17 Walter Schreiber Earplug and a method of forming an earplug
EP2397286A4 (en) 2009-02-13 2014-10-15 Sentamans Emilio Mateu HYDROJET CUTTING HEAD WITH FIVE AXES OF INFINITE ROTATION
CN103949982B (zh) * 2014-04-02 2016-09-07 徐州浩通水射流科技有限公司 一种磨料水射流切割系统工件支撑固定装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4435902A (en) * 1980-12-16 1984-03-13 Flow Industries, Inc. Articulated boom water jet cutting apparatus
US4656791A (en) * 1984-09-27 1987-04-14 Libbey-Owens-Ford Company Abrasive fluid jet cutting support
AT385709B (de) * 1985-04-16 1988-05-10 Ver Edelstahlwerke Ag Fluessigkeitsstrahl-schneidanlage fuer flaechiges schneidgut
DE8813449U1 (de) * 1988-10-26 1990-03-01 Herbert Olbrich GmbH & Co KG, 4290 Bocholt Vorrichtung zum Flüssigkeitsstrahl-Schneiden von flexiblen, reliefartigen Werkstücken
DE4217157A1 (de) * 1992-05-23 1993-11-25 Heckler & Koch Gmbh Wasserstrahlschneidemaschine

Also Published As

Publication number Publication date
ES2316235A1 (es) 2009-04-01
ES2165323A1 (es) 2002-03-01
ES2316235B1 (es) 2009-12-29
ES2165323B1 (es) 2003-06-16
DE60114616D1 (de) 2005-12-08
EP1291141A1 (en) 2003-03-12
WO2001089777A1 (es) 2001-11-29

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