EP3012075A1 - Procede de fonctionnement d'une installation de decoupage au jet d'eau et installation de decoupage au jet d'eau - Google Patents

Procede de fonctionnement d'une installation de decoupage au jet d'eau et installation de decoupage au jet d'eau Download PDF

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Publication number
EP3012075A1
EP3012075A1 EP15190372.1A EP15190372A EP3012075A1 EP 3012075 A1 EP3012075 A1 EP 3012075A1 EP 15190372 A EP15190372 A EP 15190372A EP 3012075 A1 EP3012075 A1 EP 3012075A1
Authority
EP
European Patent Office
Prior art keywords
cutting
high pressure
cutting head
pressure
head valve
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
EP15190372.1A
Other languages
German (de)
English (en)
Other versions
EP3012075B1 (fr
Inventor
Andreas Perndorfer
Ewald Perndorfer
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to RS20180303A priority Critical patent/RS57018B1/sr
Priority to PL15190372T priority patent/PL3012075T3/pl
Priority to SI201530200T priority patent/SI3012075T1/en
Publication of EP3012075A1 publication Critical patent/EP3012075A1/fr
Application granted granted Critical
Publication of EP3012075B1 publication Critical patent/EP3012075B1/fr
Priority to HRP20180419TT priority patent/HRP20180419T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
    • 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
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B26D5/04—Means for moving the cutting member into its operative position for cutting by fluid pressure
    • 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
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/12—Fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/12—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure

Definitions

  • the invention relates to a method for operating a system for water jet cutting with a plurality of plunger having connected to a water tank high pressure pump and connected to the high pressure pump high pressure line which is connected via a cutting head valve to a cutting head, driven for the cutting process, the high-pressure pump and the cutting head valve is opened, and on a suitable facility for water jet cutting.
  • high pressure pumps with plunger are often used for water jet cutting systems, with the arrangement of three plungers, the pressure fluctuations can be reduced to an allowable for water jet cutting, so that pressure accumulator can be omitted to compensate for such pressure fluctuations.
  • the plunger pumps are usually driven by three-phase motors, which are controlled by a frequency converter, which specifies the required speed for each desired flow rate.
  • the sucked by the high-pressure pump from a water tank water is therefore supplied with the set pressure, depending on the cutting conditions, for example, between 500 and 4000 bar, through a high pressure line to the cutting head, where it through a pure water nozzle at a speed up to 800 m / s (at a feed pressure of 4000 bar) emerges before the water jet optionally abrasives are supplied.
  • a cutting head valve upstream of the pure water nozzle is closed and the three-phase motor is shut down to a low speed so as not to stop the high-pressure pump from being stopped again having to drive up.
  • the amount of water delivered by the high-pressure pump after the cutting head valve has been blocked is returned via a return line into the water tank, which is released by closing the cutting head valve by a return valve.
  • the cutting head valve is open, to close the return valve and to accelerate the high pressure pump to the required operating speed, so that within the high pressure line connected to the cutting head, the required operating pressure only gradually builds up with the result that during the cut start due the temporal increase of the water outlet velocity from the pure water nozzle changes the sectional image, which has a disadvantageous effect, in particular in case of piercing, that is to say in cutting processes which do not start from a workpiece edge but start within a workpiece surface.
  • the invention is therefore based on the object to be able to operate plants for water jet cutting with plunger pumps so that in a recent cutting process, a sufficient water pressure is available to ensure a uniform cross-sectional view from the beginning, without having to use a pressure accumulator.
  • the invention solves the problem set by the fact that at the end of the cutting process, the high-pressure pump is stopped during the closing of the cutting head valve while maintaining the pressure in the high-pressure line and put back into operation at the beginning of the cutting process during the opening of the cutting head valve ,
  • the pressure in the high pressure line is not released when the cutting head valve is stopped to stop the cutting operation, this pressure is available for restarting a cutting operation, so that the cut can be made immediately after opening the cutting head valve with the operating pressure.
  • the condition is that the high pressure pump within the opening time for the cutting head valve on the speed required for the respective operating pressure in the high-pressure line is accelerated or shut down within the closing time of this valve. It therefore requires no return line to return the otherwise subsidized during the cutting break water in the water tank.
  • the pressure in the high-pressure line must be lowered accordingly before opening the cutting-head valve, so that the cutting process when opening the cutting-head valve the reduced operating pressure can be performed.
  • the drive of the high-pressure pump comprises a switchable depending on the operation of the cutting head valve servomotor with a servo and that for controlling the servo on the one hand to a setpoint generator and on the other hand is provided to an actual value for the pressure in the high pressure line connected regulator.
  • the required accelerations can be achieved within milliseconds, so that the respective predetermined water pressure is abruptly available when opening the cutting head valve. Since the control of the servo is made in dependence on the desired-actual value of the pressure in the high-pressure line, the flow resistance influencing changes in the range of pure water nozzle play no role, because by this control of the servo, for example, wear on the pure water nozzle are considered independently.
  • the high pressure line can be connected via an adjustable pressure reducing valve to a return line, which preferably also serves to shut off the return line, if the pressure reducing valve is not needed becomes.
  • the plant for water jet cutting has a high-pressure pump 1 with three plunger 2, which are driven by a servomotor 4 via a crankshaft 3.
  • the water required for cutting a workpiece is taken from a water tank 5 via a connected to the high-pressure pump 1 suction line 6 and conveyed by a pressure side connected to the high-pressure pump 1 high-pressure line 7 a cutting head 8.
  • This cutting head 8 comprises a pure water nozzle 9 for generating a water jet for cutting the workpiece.
  • Abrasive can be added to the water jet emerging from the pure water nozzle 9, if necessary, in order to increase the cutting performance, as indicated by the arrow 10.
  • the pure water nozzle 9 is preceded by a cutting head valve 11, via the actuator 12 of the cutting head 8 can be switched on and off.
  • the servomotor 4 associated Servoumrichter 13 is acted upon by a speed sensor 14.
  • the control of the servo 13 is carried out by a controller 15 with a setpoint generator 16 for the pressure in the high-pressure line 7.
  • the actual value of the pressure in the high pressure line 7 is detected via a connected to the high-pressure line 7 actual value 17 and forwarded to the controller 15, so the servo-converter 13 can be controlled as a function of the desired-actual-value difference of the pressure in the high-pressure line 7.
  • the pressure in the high pressure line 7 abruptly increases, resulting in a shutdown of the servo motor 4 via the controller 15, wherein the pressure in the high pressure line 7 is maintained and thus for the subsequent cutting process is available again.
  • the cutting head valve 11 is to be opened again via the actuator 12 and at the same time to accelerate the servo motor 4 to the setpoint of the pressure in the high-pressure line 7 associated pump speed, and that within the opening time for the cutting head valve 11, which in common with the control of the actuator 12 for the cutting head valve 11 taking place control of the servo 13 is readily possible.
  • This means that the new cutting process can be started with a delivery pressure of the water in the high pressure line 7, which at least approximately corresponds to the desired value, so that there are no changes in the sectional image during the cutting process.
  • the pressure in the high-pressure line 7 can be lowered by means of a pressure reduction valve 18 in a return line 19 connected to the high-pressure line 7 with a corresponding setpoint specification in the preceding cutting break , If the pressure reducing valve 18 is not needed, then the return line 19 can be locked via the pressure reducing valve 18 when its actuator 20 is driven accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
EP15190372.1A 2014-10-20 2015-10-19 Procede de fonctionnement d'une installation de decoupage au jet d'eau et installation de decoupage au jet d'eau Active EP3012075B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
RS20180303A RS57018B1 (sr) 2014-10-20 2015-10-19 Metod rada uređaja za sečenje vodenim mlazom i uređaj za sečenje vodenim mlazom
PL15190372T PL3012075T3 (pl) 2014-10-20 2015-10-19 Sposób eksploatacji instalacji do cięcia strumieniem wody oraz instalacja do cięcia strumieniem wody
SI201530200T SI3012075T1 (en) 2014-10-20 2015-10-31 A method for running a water jet cutting unit and a water jet cutting machine
HRP20180419TT HRP20180419T1 (hr) 2014-10-20 2018-03-09 Postupak rada uređaja za rezanje vodenim mlazom i uređaj za rezanje vodenim mlazom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50747/2014A AT515943B1 (de) 2014-10-20 2014-10-20 Verfahren zum Betreiben einer Anlage zum Wasserstrahlschneiden sowie Anlage zum Wasserstrahlschneiden

Publications (2)

Publication Number Publication Date
EP3012075A1 true EP3012075A1 (fr) 2016-04-27
EP3012075B1 EP3012075B1 (fr) 2017-12-13

Family

ID=54330681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15190372.1A Active EP3012075B1 (fr) 2014-10-20 2015-10-19 Procede de fonctionnement d'une installation de decoupage au jet d'eau et installation de decoupage au jet d'eau

Country Status (10)

Country Link
EP (1) EP3012075B1 (fr)
AT (1) AT515943B1 (fr)
DK (1) DK3012075T3 (fr)
ES (1) ES2662858T3 (fr)
HR (1) HRP20180419T1 (fr)
HU (1) HUE036924T2 (fr)
NO (1) NO3012075T3 (fr)
PL (1) PL3012075T3 (fr)
RS (1) RS57018B1 (fr)
SI (1) SI3012075T1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3369527A1 (fr) * 2017-03-01 2018-09-05 BFT GmbH Dispositif de coupe à jet de fluide ou à jet d'eau
US20210039226A1 (en) * 2018-01-31 2021-02-11 Hammelmann GmbH Device for processing a workpiece

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018124978A1 (de) * 2018-10-10 2020-04-16 Alfred Kärcher SE & Co. KG Vorrichtung und Verfahren zum Bereitstellen von unter Druck gesetzter Flüssigkeit an mehreren Verbrauchern
AT524763A1 (de) 2021-03-09 2022-09-15 Bft Gmbh Vorrichtung und Verfahren zur geregelten Bereitstellung von Hochdruckfluid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159977A2 (fr) * 1984-04-25 1985-10-30 BÖHLER Gesellschaft m.b.H. Dispositif de coupe à fluide sous pression
EP1162372A1 (fr) * 1999-01-21 2001-12-12 Sugino Machine Limited Dispositif pour pressuriser un liquide
WO2012034165A1 (fr) * 2010-09-13 2012-03-22 Techni Waterjet Pty Ltd Pompe à ultra haute pression

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5799688A (en) * 1990-12-20 1998-09-01 Jetec Company Automatic flow control valve
US6176437B1 (en) * 1993-10-15 2001-01-23 Mona Skannerup Blast gun for compressed air
ATE224581T1 (de) * 1994-06-24 2002-10-15 Electro Res Internat Pty Ltd Metallglas-schneidevorrichtung und verfahren
AT413086B (de) * 2000-01-31 2005-11-15 Franz Perndorfer 2-achsen-wasserstrahlschneidmaschine
JP2005230921A (ja) * 2004-02-17 2005-09-02 Disco Abrasive Syst Ltd ウォータージェット加工装置
JP4473599B2 (ja) * 2004-02-23 2010-06-02 株式会社ディスコ ウォータージェット加工装置
JP4288223B2 (ja) * 2004-10-18 2009-07-01 株式会社ソディック 導電性材料でなる被加工物に任意の形状を加工する方法および複合加工装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159977A2 (fr) * 1984-04-25 1985-10-30 BÖHLER Gesellschaft m.b.H. Dispositif de coupe à fluide sous pression
EP1162372A1 (fr) * 1999-01-21 2001-12-12 Sugino Machine Limited Dispositif pour pressuriser un liquide
WO2012034165A1 (fr) * 2010-09-13 2012-03-22 Techni Waterjet Pty Ltd Pompe à ultra haute pression

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3369527A1 (fr) * 2017-03-01 2018-09-05 BFT GmbH Dispositif de coupe à jet de fluide ou à jet d'eau
CN108527166A (zh) * 2017-03-01 2018-09-14 Bft有限公司 流体射流或水射流切割装置
AT519687A1 (de) * 2017-03-01 2018-09-15 Bft Gmbh Fluidstrahl- oder Wasserstrahl-Schneideinrichtung
US20210039226A1 (en) * 2018-01-31 2021-02-11 Hammelmann GmbH Device for processing a workpiece

Also Published As

Publication number Publication date
DK3012075T3 (en) 2018-03-19
NO3012075T3 (fr) 2018-05-12
AT515943B1 (de) 2016-01-15
RS57018B1 (sr) 2018-05-31
PL3012075T3 (pl) 2018-09-28
EP3012075B1 (fr) 2017-12-13
ES2662858T3 (es) 2018-04-10
AT515943A4 (de) 2016-01-15
HRP20180419T1 (hr) 2018-04-20
SI3012075T1 (en) 2018-04-30
HUE036924T2 (hu) 2018-08-28

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