EP2640552A1 - Wasser-abrasiv-suspensionsstrahl-schneidanlage - Google Patents
Wasser-abrasiv-suspensionsstrahl-schneidanlageInfo
- Publication number
- EP2640552A1 EP2640552A1 EP10805762.1A EP10805762A EP2640552A1 EP 2640552 A1 EP2640552 A1 EP 2640552A1 EP 10805762 A EP10805762 A EP 10805762A EP 2640552 A1 EP2640552 A1 EP 2640552A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow path
- abrasive
- main flow
- water
- pressure
- 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
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 102
- 239000000725 suspension Substances 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 22
- 239000012530 fluid Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 abstract 1
- 238000011144 upstream manufacturing Methods 0.000 description 13
- 239000003082 abrasive agent Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000010926 purge Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000035508 accumulation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
- B24C7/0015—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
Definitions
- the invention relates to a water-abrasive suspension jet cutting system according to the preamble of claim 1.
- a high pressure water jet with added abrasive is usually used to cut materials, such as metal.
- the first system is water-abrasive injection cutting.
- water is discharged from a nozzle under high pressure and an abrasive is added directly to the nozzle to the water jet.
- the water emerging from the nozzle enters a mixing chamber, in which the abrasive is sucked into the liquid jet by injector action.
- the water-abrasive-air mixture is then passed through a focussing tube and hits the workpiece. This method is used in particular for cutting metal sheets in metalworking.
- the second known system is the water-abrasive suspension jet cutting, by means of which higher cutting performance can be achieved, ie in particular larger material thicknesses and almost all materials can be cut.
- water is discharged under high pressure from a cutting nozzle.
- the abrasive is not added to the nozzle but the abrasive is mixed under exclusion of air under system pressure, ie under high pressure, the water well before it enters the nozzle. Ie. a water-abrasive mixture, ie a suspension, exits the cutting nozzle under high pressure.
- Cutting system has, like known suspension cutting machines on a high-pressure pump, which provides the output side water under high pressure. Furthermore, the system has a cutting nozzle, which is connected to the high-pressure pump and forms the high-pressure suspension jet for cutting. Ie. A high-pressure suspension jet (water-abrasive suspension) exits this cutting nozzle and is then used to cut a wide variety of materials, for example metal.
- the cutting nozzle is connected to the high pressure pump via a main flow path and a bypass flow path branching from it. The tributary away leads through a Abrasivsch-Druckläölter, in which the abrasive is below the system pressure of the system, ie the water pressure generated by the high-pressure pump.
- the secondary flow path opens into the main flow path at a mixing point which is located in a line section adjoining the cutting nozzle and, in particular, is located directly adjacent to the cutting nozzle or in the cutting nozzle itself. This has the advantage that the part of the main flow path through which the suspension flows is kept as short as possible.
- the abrasive agent supply has hitherto been stopped by closing a shut-off valve in the secondary flow path or bypass, so that the water flow passing through the abrasive fluid pressure vessel is interrupted and thus no more abrasive is conveyed into the main flow path.
- the abrasive agent still remaining in the main flow path downstream of the junction of the bypass flow path will be discharged from the cutting nozzle by the continuing main flow, so that the cutting process can not be stopped immediately.
- the abrasive center part remaining in the main flow path is minimized when the flow through the bypass flow path is cut off, so that the follow-up time when shutting off the abrasive supply is shortened and the cutting process can be stopped faster.
- the mixture between the main and secondary flow must be upstream of the actual nozzle or outlet opening, so that the suspension formation takes place under high pressure without air supply in order to achieve the maximum cutting performance.
- the mixing point of the cutting nozzle upstream is arranged less than 100 cm, preferably less than 50 cm and in particular less than 30 cm apart.
- the mixing point is movable together with the cutting nozzle.
- the cutting nozzle is connected to the other plant components, in particular the high-pressure water supply and the abrasive agent supply via a hose, which allows the mobility of the cutting nozzle in the cutting process.
- the mixing point at which the secondary flow with the abrasive is mixed with the main flow in the main flow path is upstream of this hose while the cutting nozzle is downstream of the hose, ie, the distance between the mixing point and the cutting nozzle may be several tens or one hundred meters.
- the mixing point also downstream of the hose, which allows the mobility of the cutting nozzle to arrange. Ie.
- the main flow path and the secondary flow are mungsweg at least in a section each lead as a hose or movable pipe to the cutting nozzle, so that it is compared to the rest of the system, in particular the Abrasivstoff- pressure vessel and the high-pressure pump, movable, but the mixing point between Fineströmungsweg and Hauptströmungsweg can be arranged near the cutting nozzle ,
- means for generating a back pressure are present at the mixing point.
- the means generate such a back pressure at the outlet of the first bypass flow path in the main flow path, that the backpressure prevents the suspension from flowing out of the secondary flow path into the main flow path. Ie. due to the pressure conditions is achieved that a passage of the flow is prevented from the first Fineströmungsweg in the main flow path.
- a second Mauströmungsweg is provided to build up the back pressure at the mixing point, which branches off from the main flow path, vorzusgweise upstream of the branch point to the first Mauströmungsweg.
- a check valve is disposed and the second bypass flow path also opens into the main flow path at the mixing point at which the first bypass flow path opens into the main flow path.
- This embodiment allows a very rapid shutdown of Abrasivatorizubuch in such a way that not the flow through the first Mauströmungsweg is interrupted by means of a downstream of Abrasivatori-pressure vessel located shut-off valve, but in that in the region of the mixing point, a back pressure is built up, which the outlet of the Abrasivatori- suspension from the first secondary flow path in the main flow prohibited.
- the shut-off valve is opened in the second bypass flow path so that a counter-pressure is built up at the mixing point, which prevents the flow from entering the main flow path from the first bypass flow path.
- the two Crowströmungsweg opens at the mixing channel relative to the first Mauströmungsweg in the main flow path, so that the fastest possible construction of the back pressure at the outlet of the first flow path to prevent the further flow outlet can take place from the first flow path.
- the water-abrasive suspension jet cutting system is preferably set or adjustable such that substantially the same or a lower pressure prevails in the first secondary flow path than in the second secondary flow path when the shut-off valve is open. This ensures that, when the shut-off valve is opened in the second Mauströmungsweg to stop the Abrasivatorizubow, by the flow in the second bypass flow path at the mixing point such a pressure is built up, which prevents the exit of the suspension from the first Mauströmungsweg in the main flow path .
- the abrasive pressure vessel has an exit line which is part of the first bypass path and is connected to the mixing point. Through this outlet line, the high-pressure suspension is led to the mixing point, where the suspension then enters the main flow path.
- the outlet line is additionally connected in the region of its end facing the abrasive-pressure container via a shut-off valve to the main flow path.
- a shut-off valve to the main flow path.
- This connection branches from the first secondary flow path on the outlet side of the abrasive pressure vessel, if possible, adjacent to the outlet from the abrasive pressure vessel.
- a shut-off valve is provided in this connection. This connection with the stop valve disposed therein forms a purge line or a purge valve, which is used to reduce the pressure in Abrasivsch-pressure vessel can.
- the compound can also be used to prevent an uncontrolled discharge of abrasive from the abrasive fluid pressure vessel during startup of the system.
- the build-up of pressure in the abrasive pressure vessel can be at least partially achieved by opening the connection between the outlet line and the main flow path by opening the shut-off valve arranged in it and thus pressing high-pressure water into the outlet side of the abrasive medium pressure vessel is there and contributes to the pressure build-up.
- the discharge of abrasive from the pressure vessel is prevented.
- valve is then closed in the connection between the discharge line and the main flow path, so that a transfer of suspension through this connection in the main flow path is prevented and the suspension enters the main flow path near the cutting nozzle only at the mixing point described above.
- a shut-off valve or bypass valve be arranged in the first secondary flow path on the inlet side of the abrasive pressure vessel, ie upstream of the abrasive pressure vessel, through which the flow in the first The flow path can be switched on and off.
- the shut-off valve can be used to start up and shut down the system.
- the cutting nozzle is also preferably attached to a positioning system and movable over this in at least one direction.
- the positioning system may be part of a cutting system that can move the cutting nozzle in different directions relative to a workpiece.
- the cutting system can, for example, have a robot which carries the cutting nozzle and can move by appropriate control in desired paths in order to carry out cutting operations in a material along these.
- the nozzle can be movable in at least one plane in two directions, so that it can perform any cutting operations in a flat workpiece.
- the plant parts for abrasive agent supply in particular the abrasive fluid pressure vessel and the high-pressure pump are expediently arranged fixed so that they are not movable with the cutting nozzle and the movable cutting nozzle, as described above, via two pressure lines, one for the main flow and one for the first Mauströmungsweg, connected to the fixed system parts.
- a third pressure line in the form of a flexible hose could also be provided.
- the mixing point described above can be arranged directly on the movable nozzle in order to start and stop the supply of abrasive as quickly as possible.
- Fig. 2 shows schematically a water-abrasive suspension jet cutting device according to a second embodiment of the invention
- 3a, 3b is a detail view of the mixing point in Fig. 2, wherein in FIG.
- the cutting system has a pressure source in the form of a high-pressure pump 2, which provides water under high pressure for the system.
- a check valve 4 connects to the high-pressure pump. Downstream of the check valve 4, the flow path branches into a main flow path 6 and a first bypass 8.
- the main flow path continues through a high pressure hose 10 to a mixing chamber 12 which is disposed adjacent to the cutting nozzle 14. Instead of a hose 10, a pipe could also be used.
- the Cranströmungsweg 8 passes via a check valve or bypass valve 1 6 to the abrasive pressure vessel. By the Shut-off valve 16, the Mauströmungsweg 8 can be opened to the Abrasivsch- pressure vessel 18 and closed.
- the abrasive medium is located in the abrasive pressure container 18 and the flow through the secondary flow path 8 is conducted through the abrasive when the shut-off valve 16 is open and exits through the outlet line 20 together with the abrasive as a suspension from the abrasive pressure vessel 18 on the outlet side.
- the first Mauströmungsweg 8 then runs downstream of the pressure vessel 18 through a high-pressure hose or hose 22 also to the mixing chamber 12, in which then at a mixing point 24, the flow from the first Mauströmungsweg 8 flows into the flow in the main flow path 6, so there is a diluted suspension is formed, which then flows on to the cutting nozzle 14. From the cutting nozzle 14 then emerges a high-pressure water jet with abrasives, which is used to cut a workpiece 26.
- the cutting nozzle 14 is movable relative to the workpiece 26 via a positioning system 28, which is indicated here only by the directions of movement, to perform the desired cutting movements for forming cuts in the workpiece 26.
- the fixed equipment parts are connected via the high-pressure hoses 10 and 22 with the mixing chamber 12 and the cutting nozzle 14.
- the mixing chamber 12 and the cutting nozzle 14 are arranged firmly together, in particular firmly connected to each other or optionally also integrated into a component.
- FIG. 1 An even faster shutdown can be achieved in the embodiment of FIG.
- the shut-off valve 16 closes, ie a portion of abrasive agent is still discharged from the hose 22 into the mixing chamber 12 and thus the main flow path due to pressure reduction, in particular in the pressure vessel 18.
- the shut-off valve 16 is opened, the hose 22 must first be completely filled with abrasive again until a stable cutting process is achieved. This lead and lag can be shortened in the embodiment of FIG.
- a second secondary flow path 30 is additionally provided which branches off from the main flow path 6 upstream of the check valve 4 and is provided with a shut-off valve 32.
- the second secondary flow path 30 leads via a further high-pressure hose or hose 34 to the mixing chamber 12, where it also opens into the main flow path 6 at the mixing point 24.
- the abrasive supply can not be stopped only by closing the check valve 16 in the second bypass flow path 8 upstream of the pressure vessel 18, but instead This is done by the shut-off valve 32 is opened in the second Mauströmungsweg 30, whereby additionally high-pressure water is fed to the mixing point 24 and there is a counterpressure to the from the first Fineströmungsweg eighth or the hose 22 exiting suspension builds up, which then prevents the exit of the suspension at the mixing point 24.
- FIG. 3a shows the opened abrasive feed.
- FIG. In this case, a flow through the Mauströmungsweg 8, which leads through the Abrasivstoff-pressure vessel 18 and thus encouraging means to the mixing point 24 promotes.
- the suspension from the first Mauströmungsweg 8 enters the flow of the main flow path 6 and the thus diluted suspension is passed on to the cutting nozzle 14.
- the check valve 32 in the second bypass flow path 30 is closed in this state, ie, there is no back pressure at the junction 36 of the second bypass flow path 30 in the main flow path 6, so that the flow from the bypass flow path 8 can freely enter the main flow through the main flow path 6.
- connection 38 is connected to the first secondary flow path 8 upstream of the shut-off valve 16. Ie. this connection is independent of the position of the shut-off valve 16.
- the connection 38 opens into the discharge line 20 at the end adjacent to the abrasive-pressure container 18, ie, upstream of the hose 22.
- a purge valve 40 is arranged through which the connection 38 can be opened or closed.
- this purge valve 40 When shutting down the system when the pressure in the pressure vessel 18 is reduced, this purge valve 40 can be opened, so that pure water from the main flow path 6 the abrasive fluid pressure vessel is bridged into the outlet line 20 and the hose 22 is passed to flush it. In this way, abrasive residues, which remain in the tube 22 at shutdown, are flushed out of this.
- the purge valve 40 is closed, so that a backflow of suspension from the abrasive pressure vessel in the main flow path 6 via the connection 38 is not possible. Even when starting up the system, the purge valve 40 can be opened, so that via the connection 38 in the outlet line 20, a pressure is built up, via which the abrasive-pressure container 18 is pressurized.
- abrasive fluid pressure vessel 18 When the abrasive fluid pressure vessel 18 is pressurized via the exit side, unwanted discharge of abrasive is prevented when the system is started up.
- the Pressurization can be done simultaneously by opening the shut-off valve 16 via the inlet side, so that a Abrasivstoff- discharge can be prevented in both directions at startup of the plant from the abrasive pressure vessel.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL10805762T PL2640552T3 (pl) | 2010-11-20 | 2010-11-20 | Instalacja tnąca z zawiesinową strugą wodno-ścierną |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2010/001361 WO2012065580A1 (de) | 2010-11-20 | 2010-11-20 | Wasser-abrasiv-suspensionsstrahl-schneidanlage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2640552A1 true EP2640552A1 (de) | 2013-09-25 |
EP2640552B1 EP2640552B1 (de) | 2014-11-19 |
Family
ID=43859830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10805762.1A Active EP2640552B1 (de) | 2010-11-20 | 2010-11-20 | Wasser-abrasiv-suspensionsstrahl-schneidanlage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2640552B1 (de) |
ES (1) | ES2527223T3 (de) |
PL (1) | PL2640552T3 (de) |
WO (1) | WO2012065580A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3638452A4 (de) * | 2017-06-14 | 2021-03-10 | Graco Minnesota Inc. | Schleifstrahlsystem |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103419140B (zh) * | 2012-05-25 | 2016-12-14 | 宝山钢铁股份有限公司 | 一种后混合高压射流清洗用供砂浓度控制方法及装置 |
CH707657A1 (de) | 2013-02-21 | 2014-08-29 | Waterjet Robotics Ag C O Matthias Straubhaar | Verfahren zum Bohren mindestens eines Loches in einem Werkstück mittels eines Bearbeitungsstrahls aus Flüssigkeit. |
DE102014100839B4 (de) * | 2014-01-24 | 2015-10-15 | Gottfried Wilhelm Leibniz Universität Hannover | Wasserabrasiv-Suspensionsschneideeinrichtung, Verfahren zu dessen Steuerung und Computerprogramm |
CA2944227C (en) * | 2014-04-04 | 2020-12-15 | Ant Applied New Technologies Ag | Water-abrasive-suspension cutting system |
WO2017207054A1 (de) | 2016-06-02 | 2017-12-07 | Ant Applied New Technologies Ag | Wasser-abrasiv-suspensions-schneidanlage |
US20210107115A1 (en) * | 2017-03-31 | 2021-04-15 | Ant Applied New Technologies Ag | Water-abrasive-suspension cutting system and method for water-abrasive-suspension cutting |
DE202019106879U1 (de) | 2018-12-18 | 2020-01-30 | Technische Universität Chemnitz | Vorrichtung zum Schalten einer Hochdruck-Suspension |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4707952A (en) * | 1986-10-01 | 1987-11-24 | Ingersoll-Rand Company | Liquid/abrasive jet cutting apparatus |
GB9719550D0 (en) * | 1997-09-16 | 1997-11-19 | Miller Donald S | Fluid abrasive jets for machining |
GB0612944D0 (en) * | 2006-06-29 | 2006-08-09 | Bhr Group Ltd | Water jet cutting apparatus |
-
2010
- 2010-11-20 ES ES10805762.1T patent/ES2527223T3/es active Active
- 2010-11-20 WO PCT/DE2010/001361 patent/WO2012065580A1/de active Application Filing
- 2010-11-20 PL PL10805762T patent/PL2640552T3/pl unknown
- 2010-11-20 EP EP10805762.1A patent/EP2640552B1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012065580A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3638452A4 (de) * | 2017-06-14 | 2021-03-10 | Graco Minnesota Inc. | Schleifstrahlsystem |
Also Published As
Publication number | Publication date |
---|---|
EP2640552B1 (de) | 2014-11-19 |
WO2012065580A1 (de) | 2012-05-24 |
PL2640552T3 (pl) | 2015-04-30 |
ES2527223T3 (es) | 2015-01-21 |
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