WO2014000954A1 - Method for the hydroerosive rounding of bore passages - Google Patents
Method for the hydroerosive rounding of bore passages Download PDFInfo
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- WO2014000954A1 WO2014000954A1 PCT/EP2013/060057 EP2013060057W WO2014000954A1 WO 2014000954 A1 WO2014000954 A1 WO 2014000954A1 EP 2013060057 W EP2013060057 W EP 2013060057W WO 2014000954 A1 WO2014000954 A1 WO 2014000954A1
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- flow
- flow channels
- flow channel
- bore
- hollow needle
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
- B24B31/116—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
- B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
- B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
- B24C3/327—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface
Definitions
- the invention is based on a method for the hydroerosive rounding of holes or holes in components, in particular of spray holes in nozzle bodies of fuel injection valves.
- FIG. 1 illustrates this rounding process according to the prior art using the example of a nozzle body 10 shown in longitudinal section.
- an obstacle body 12 is inserted, of which in FIG. 1, a with respect to the longitudinal axis 17 of the nozzle body 10 right-side cutout is shown.
- the interior 1 1 of the nozzle body 10 delimiting wall 13 is penetrated by a bore 14.
- a fluid medium which has highly abrasive grinding particles, via an inlet channel or flow channel 16 into the interior 1 1 under a certain pressure p- ⁇ initiated.
- the pressurized fluid medium flows around the obstacle body 12 in the interior space 11 of the nozzle body 10, and finally passes outwardly through the bore 14 to be machined.
- the inlet edge 15 of the bore 14 lying on the inlet side of the bore 14 is rounded.
- a disadvantage of this prior art is that the removal of material during the rounding process of the inlet edge is only limited controllable and consequently the rounding of the respective inlet edge of spray hole to spray hole can vary widely with constant constant flow of the fluid medium.
- the method with the features of claim 1 has the advantage that by defining two flow channels, which are brought together only in the immediate vicinity of the inlet edge of the bore to be processed and their pressures are set independently of each other, one compared to the prior art significantly better control of the rounding process can be achieved by the inflow at the spray hole inlet or the leading edge of the bore to be machined defined controlled.
- the thereby taking place material removal at the inlet edge of the bore is thus defined and can be controlled both locally and quantitatively.
- a significant reduction of the rejects in the production of components is thereby achieved over the prior art.
- when using the method according to the invention for rounding spray holes in injection nozzles or injectors is achieved by the defined controllable removal of material at the inlet edge of the spray hole a relation to the prior art significantly increased reliability of the invention processed component.
- FIG. 1 is a longitudinal sectional view of a nozzle body, in which in a conventional manner an obstacle body is inserted into the interior of the nozzle body and is positioned in the vicinity of a bore to be machined, wherein an abrasive particles having fluid medium in the interior of the nozzle body flows around the obstacle body, accelerated flows to the inlet edge of the bore and passes through the bore, as well
- FIG. 2 shows a sectional view of a nozzle body, in which, according to the invention, a hollow needle-shaped body is introduced into the interior and is to be worked in the vicinity of a body positioned injection hole, whereby a substantially annular formed first flow channel between the wall of the nozzle body and the outer wall of the hollow cylindrical body and a second substantially centrally extending flow channel are defined, in which media with different adjustable pressures reach the inlet edge of the bore and the bore flow through.
- FIG. 2 illustrates, in a partial view, a longitudinal section of a right-side section of a nozzle body 100 in order to explain the method according to the invention.
- a hollow needle-shaped or hollow cylindrical body 102 is introduced, of which in Fig. 2, only one with respect to the longitudinal axis 107 of the nozzle body 100 right side wall portion is shown.
- the wall 103 of the nozzle body 100 which limits the interior 101 of the nozzle body 100 to the outside, is penetrated by a bore 104.
- the hollow needle-shaped body 102 is positioned within the interior 102 such that its downstream end 102 ' faces the inlet edge 105 of the bore 104 to be machined.
- two flow channels 1 1 1, 1 12 are provided according to the invention in the interior 101 of the nozzle body 100.
- a first flow channel 1 1 1 extends through the intermediate space arranged annularly between the outer wall of the hollow needle-shaped body 102 and the wall 103 of the inner space 101, while a second flow channel 1 12 extends through the interior of the hollow needle-shaped body 102.
- Each of the two flow channels 1 1 1, 1 12 is associated with a respective not shown in Fig. 1 reservoir, each having a fluid medium with highly abrasive abrasive particles. From each reservoir, the respective fluid medium is pumped via a line into the corresponding flow channel 1 1 1, 1 12 or inlet channel under a respective individually adjustable pressure, so that the fluid medium in the first flow channel 1 1 1 under a certain pressure p- ⁇ and the
- Fluid medium in the second flow channel 1 12 under a certain pressure p 2 flows.
- the hollow needle-shaped body 102 guiding the second flow channel 12 is introduced into the inner space 101 of the nozzle body 100 such that its downstream end 102 'is positioned in the vicinity of the bore 104 to be machined so that both flow channels 11 1 1, 12 are located downstream End 102 'of the hollow needle-shaped body 102 in front of the drilling 104 are merged.
- due to the orientation of the downstream end 102 'of the hollow needle-shaped body 102 on the bore 104 extends the course of the boundary layer 106 between the flow channels 1 1 1, 1 12 from the downstream end 102 ' of the hollow needle-shaped body 102 into the injection hole 104 into it.
- the media flowing in the two flow channels 11 1, 12 each then strike the inlet edge 105 of the injection hole 104 to be processed and pass through the injection hole 104 of the nozzle body 100 to the outside.
- the flow and thus the rounding of the injection hole 104 is controlled by in both flow channels 1 1 1, 1 12 different pressures pi and p 2 are set, which are also still temporally variable. If, for example, the pressures pi and p 2 are set or selected so that the prevailing in the second flow channel 1 12 pressure p 2 is greater than the pressure p- ⁇ in the first flow channel 1 1 1, defined in the course of the invention
- An optimization of the method according to the invention, with which the material can be removed even more precisely and locally defined, provides that the respective concentration of abrasive particles in each of the flow channels 1 1 1, 1 12 is set individually.
- the particular particle density in the flow channels 1 1 1, 1 12 is selected so that the fluid medium, which flows along the inside of the hollow needle-shaped body 102 extending second flow channel 1 12, has a high particle density, while the fluid medium, which flows along the other flow channel 1 1 1, has a lower particle density.
- the medium flowing along the second flow channel 1 12 develops a greater abrasive effect than the medium having the lower particle density flowing in the other flow channel 1 1 1.
- the grain size of the abrasive particles is chosen differently for each of the flow channels 111, 112.
- the viscosity of the flow media for each of the flow channels 111, 112 is selected differently.
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- Mechanical Engineering (AREA)
- Nozzles (AREA)
Description
Verfahren zum hydroerosiven Verrunden von Bohrungen Method for hydroerosive rounding of boreholes
Beschreibung description
Stand der Technik Die Erfindung geht aus von einem Verfahren zum hydroerosiven Verrunden von Bohrungen oder Löchern in Bauteilen, insbesondere von Spritzlöchern in Düsenkörpern von Kraftstoffeinspritzventilen. PRIOR ART The invention is based on a method for the hydroerosive rounding of holes or holes in components, in particular of spray holes in nozzle bodies of fuel injection valves.
Um Bohrungen bzw. Spritzlöcher von Einspritzventilen zu verrunden, wird standardmäßig der sog. hydroerosive Verrundungsprozess eingesetzt. Dabei wird ein fluides Medium, das abrasiv wirkende Partikel aufweist, unter einem bestimmten Druck in den zu den Spritzlöchern bzw. Bohrungen führenden Innenraum des Einspritzventils bzw. Düsenkörpers eingeleitet. Indem das fluide Medium durch die zu bearbeitende Bohrung strömt, findet eine Verrundung an der Einlaufkante der Bohrung statt. In Fig. 1 ist dieser Verrundungsprozess gemäß dem Stand der Technik am Beispiel eines im Längsschnitt dargestellten Düsenkörpers 10 illustriert. In den Innenraum 1 1 des Düsenkörpers 10 ist ein Hinderniskörper 12 eingeführt, von dem in Fig. 1 ein bezüglich der Längsachse 17 des Düsenkörpers 10 rechtsseitiger Ausschnitt dargestellt ist. Die den Innenraum 1 1 des Düsenkörpers 10 begrenzende Wandung 13 ist von einer Bohrung 14 durchsetzt. Aus einem in Fig. 1 nicht dargestellten Reservoir wird mittels einer ebenfalls nicht dargestellten Pumpe ein fluides Medium, das stark abrasiv wirkende Schleifpartikel aufweist, über einen Zulaufkanal bzw. Strömungskanal 16 in den Innenraum 1 1 unter einem bestimmten Druck p-ι eingeleitet. Das unter Druck stehende fluide Medium umströmt in dem Innenraum 1 1 des Düsenkörpers 10 den Hinderniskörper 12, um schließlich durch die zu bearbeitende Bohrung 14 nach außen hindurchzutre- ten. Dabei wird die an der Eintrittsseite der Bohrung 14 liegende Einlaufkante 15 der Bohrung 14 verrundet. Nachteilig bei diesem Stand der Technik ist, dass der Materialabtrag beim Verrundungsprozess der Einlaufkante nur bedingt steuerbar ist und mithin das Verrunden der jeweiligen Einlaufkante von Spritzloch zu Spritzloch bei konstant gleichbleibendem Durchfluss des fluiden Mediums stark variieren kann. To round holes or injection holes of injection valves, the so-called hydroerosive rounding process is used as standard. In this case, a fluid medium having abrasive particles, under a certain pressure in the leading to the spray holes or holes interior of the injector or nozzle body is introduced. As the fluid flows through the bore to be machined, a rounding occurs at the leading edge of the bore. FIG. 1 illustrates this rounding process according to the prior art using the example of a nozzle body 10 shown in longitudinal section. In the interior 1 1 of the nozzle body 10, an obstacle body 12 is inserted, of which in FIG. 1, a with respect to the longitudinal axis 17 of the nozzle body 10 right-side cutout is shown. The interior 1 1 of the nozzle body 10 delimiting wall 13 is penetrated by a bore 14. From a reservoir, not shown in FIG. 1, by means of a likewise not shown pump, a fluid medium, which has highly abrasive grinding particles, via an inlet channel or flow channel 16 into the interior 1 1 under a certain pressure p-ι initiated. The pressurized fluid medium flows around the obstacle body 12 in the interior space 11 of the nozzle body 10, and finally passes outwardly through the bore 14 to be machined. In this case, the inlet edge 15 of the bore 14 lying on the inlet side of the bore 14 is rounded. A disadvantage of this prior art is that the removal of material during the rounding process of the inlet edge is only limited controllable and consequently the rounding of the respective inlet edge of spray hole to spray hole can vary widely with constant constant flow of the fluid medium.
Vorteile der Erfindung Das Verfahren mit den Merkmalen des Patentanspruchs 1 hat den Vorteil, dass durch Definieren von zwei Strömungskanälen, welche erst in unmittelbarer Nähe zur Einlaufkante der zu bearbeitenden Bohrung zusammengeführt werden und deren Drücke unabhängig vonei- nander eingestellt werden, sich eine gegenüber dem Stand der Technik signifikant bessere Kontrolle des Verrundungsprozesses erzielen lässt, indem die Anströmung an dem Spritzlocheintritt bzw. der Einlaufkante der zu bearbeitenden Bohrung definiert gesteuert wird. Der dabei erfolgende Materialabtrag an der Einlaufkante der Bohrung erfolgt mithin definiert und ist sowohl lokal als auch quantitativ regelbar. Vorteilhaft ist dadurch gegenüber dem Stand der Technik ein deutliche Reduzierung des Ausschusses bei der Fertigung von Bauteilen erzielbar. Insbesondere beim Einsatz des erfindungsgemäßen Verfahrens zur Verrundung von Spritzlöchern in Einspritzdüsen bzw. Injektoren wird durch den definiert steuerbaren Materialabtrag an der Einlaufkante des Spritzlochs eine gegenüber dem Stand der Technik signifikant erhöhte Funktionssicherheit des erfindungsgemäß bearbeiteten Bauteils erzielt. Advantages of the invention The method with the features of claim 1 has the advantage that by defining two flow channels, which are brought together only in the immediate vicinity of the inlet edge of the bore to be processed and their pressures are set independently of each other, one compared to the prior art significantly better control of the rounding process can be achieved by the inflow at the spray hole inlet or the leading edge of the bore to be machined defined controlled. The thereby taking place material removal at the inlet edge of the bore is thus defined and can be controlled both locally and quantitatively. Advantageously, a significant reduction of the rejects in the production of components is thereby achieved over the prior art. In particular, when using the method according to the invention for rounding spray holes in injection nozzles or injectors is achieved by the defined controllable removal of material at the inlet edge of the spray hole a relation to the prior art significantly increased reliability of the invention processed component.
Weitere vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung ergeben sich durch die in den Unteransprüchen aufgeführten Maßnahmen. Indem gemäß einer Ausgestaltung des erfindungsgemäßen Verfahrens die Drücke in den Strömungskanälen zeitlich variiert werden, lässt sich eine kostensenkende Reduzierung der zum Verrunden erforderlichen Pro- zessdauer gegenüber dem Stand der Technik erreichen. Further advantageous developments and refinements of the invention will become apparent from the measures listed in the dependent claims. By varying the pressures in the flow channels in terms of time according to an embodiment of the method according to the invention, it is possible to achieve a cost-reducing reduction in the process time required for rounding compared with the prior art.
Zeichnungen drawings
Anhand der beigefügten Zeichnungen soll nachstehend eine Ausführungsform der Erfindung näher erläutert werden. In schematisch gehaltenen Ansichten zeigen: Reference to the accompanying drawings, an embodiment of the invention will be explained in more detail below. In schematic views show:
Fig. 1 eine im Längsschnitt gehaltene Teilansicht eines Düsenkörpers, bei dem in herkömmlicher Weise ein Hinderniskörper in den Innenraum des Düsenkörpers eingeführt ist und in der Nähe einer zu bearbeitenden Bohrung positioniert ist, wobei ein Schleifpartikel aufweisendes fluides Medium im Innenraum des Düsenkörpers den Hinderniskörper umströmt, beschleunigt auf die Einlaufkante der Bohrung zuströmt und durch die Bohrung hindurchtritt, sowie 1 is a longitudinal sectional view of a nozzle body, in which in a conventional manner an obstacle body is inserted into the interior of the nozzle body and is positioned in the vicinity of a bore to be machined, wherein an abrasive particles having fluid medium in the interior of the nozzle body flows around the obstacle body, accelerated flows to the inlet edge of the bore and passes through the bore, as well
Fig. 2 eine im Schnitt gehaltene Teilansicht eines Düsenkörpers, bei dem erfindungsgemäß ein hohlnadelförmiger Körper in den Innenraum eingeführt und in der Nähe eines zu bearbei- tenden Einspritzlochs positioniert ist, wodurch ein im wesentlichen ringförmig ausgebildeter erster Strömungskanal zwischen der Wandung des Düsenkörpers und der Außenwandung des hohlzylindrischen Körpers und ein zweiter im wesentlichen zentral verlaufender Strömungskanal definiert werden, in welchen Medien mit unterschiedlich einstellbaren Drücken zur Einlaufkante der Bohrung gelangen und die Bohrung durchströmen. 2 shows a sectional view of a nozzle body, in which, according to the invention, a hollow needle-shaped body is introduced into the interior and is to be worked in the vicinity of a body positioned injection hole, whereby a substantially annular formed first flow channel between the wall of the nozzle body and the outer wall of the hollow cylindrical body and a second substantially centrally extending flow channel are defined, in which media with different adjustable pressures reach the inlet edge of the bore and the bore flow through.
Beschreibung des Ausführungsbeispiels Description of the embodiment
Fig. 2 veranschaulicht zur Erläuterung des erfindungsgemäßen Verfahrens in einer Teilan- sieht einen rechtsseitigen Ausschnitt eines Düsenkörpers 100 im Längsschnitt. In den Innenraum 101 des Düsenkörpers 100 wird erfindungsgemäß ein hohlnadelförmiger bzw. hohlzylindrischer Körper 102 eingeführt, von dem in Fig. 2 lediglich ein bezüglich der Längsachse 107 des Düsenkörpers 100 rechtsseitiger Wandungsabschnitt dargestellt ist. Die Wandung 103 des Düsenkörpers 100, welche den Innenraum 101 des Düsenkörpers 100 nach außen hin begrenzt, ist von einer Bohrung 104 durchsetzt. Der hohlnadelförmige Körper 102 wird innerhalb des Innenraums 102 derart positioniert, dass dessen abströmseitiges Ende 102' der Einlaufkante 105 der zu bearbeitenden Bohrung 104 zugewandt ist. Im Unterschied zum Stand der Technik, bei dem lediglich ein Strömungskanal mit einem fluiden Medium vorgesehen ist, werden erfindungsgemäß im Innenraum 101 des Düsenkörpers 100 zwei Strö- mungskanäle 1 1 1 , 1 12 vorgesehen. FIG. 2 illustrates, in a partial view, a longitudinal section of a right-side section of a nozzle body 100 in order to explain the method according to the invention. In the interior 101 of the nozzle body 100 according to the invention a hollow needle-shaped or hollow cylindrical body 102 is introduced, of which in Fig. 2, only one with respect to the longitudinal axis 107 of the nozzle body 100 right side wall portion is shown. The wall 103 of the nozzle body 100, which limits the interior 101 of the nozzle body 100 to the outside, is penetrated by a bore 104. The hollow needle-shaped body 102 is positioned within the interior 102 such that its downstream end 102 ' faces the inlet edge 105 of the bore 104 to be machined. In contrast to the prior art, in which only one flow channel with a fluid medium is provided, two flow channels 1 1 1, 1 12 are provided according to the invention in the interior 101 of the nozzle body 100.
Dabei erstreckt sich ein erster Strömungskanal 1 1 1 durch den ringförmig zwischen der Außenwandung des hohlnadelförmigen Körpers 102 und der Wandung 103 des Innenraums 101 angeordneten Zwischenraum, während ein zweiter Strömungskanal 1 12 durch das Inne- re des hohlnadelförmigen Körpers 102 verläuft. Jedem der beiden Strömungskanäle 1 1 1 , 1 12 ist jeweils ein in Fig. 1 nicht dargestelltes Reservoir zugeordnet, das jeweils ein fluides Medium mit stark abrasiv wirkenden Schleifpartikeln aufweist. Aus jedem Reservoir wird das jeweilige Fluidmedium über eine Leitung in den entsprechenden Strömungskanal 1 1 1 , 1 12 bzw. Zulaufkanal unter einem jeweils individuell einstellbaren Druck gepumpt, so dass das Fluidmedium im ersten Strömungskanal 1 1 1 unter einem bestimmten Druck p-ι und dasIn this case, a first flow channel 1 1 1 extends through the intermediate space arranged annularly between the outer wall of the hollow needle-shaped body 102 and the wall 103 of the inner space 101, while a second flow channel 1 12 extends through the interior of the hollow needle-shaped body 102. Each of the two flow channels 1 1 1, 1 12 is associated with a respective not shown in Fig. 1 reservoir, each having a fluid medium with highly abrasive abrasive particles. From each reservoir, the respective fluid medium is pumped via a line into the corresponding flow channel 1 1 1, 1 12 or inlet channel under a respective individually adjustable pressure, so that the fluid medium in the first flow channel 1 1 1 under a certain pressure p-ι and the
Fluidmedium im zweiten Strömungskanal 1 12 unter einem bestimmten Druck p2 fließt. Der den zweiten Strömungskanal 1 12 führende hohlnadelförmige Körper 102 wird so in den Innenraum 101 des Düsenkörpers 100 eingeführt, dass dessen abströmseitiges Ende 102' in der Nähe der zu bearbeitenden Bohrung 104 positioniert ist, so dass beide Strömungskanäle 1 1 1 , 1 12 am abströmseitigen Ende 102' des hohlnadelförmigen Körpers 102 vor der Boh- rung 104 zusammengeführt werden. Dabei erstreckt sich aufgrund der Ausrichtung des abströmseitigen Endes 102' des hohlnadelförmigen Körpers 102 auf die Bohrung 104 der Verlauf der Grenzschicht 106 zwischen den Strömungskanälen 1 1 1 , 1 12 von dem abströmseitigen Ende 102' des hohlnadelförmigen Körpers 102 bis in das Spritzloch 104 hinein. Fluid medium in the second flow channel 1 12 under a certain pressure p 2 flows. The hollow needle-shaped body 102 guiding the second flow channel 12 is introduced into the inner space 101 of the nozzle body 100 such that its downstream end 102 'is positioned in the vicinity of the bore 104 to be machined so that both flow channels 11 1 1, 12 are located downstream End 102 'of the hollow needle-shaped body 102 in front of the drilling 104 are merged. In this case, due to the orientation of the downstream end 102 'of the hollow needle-shaped body 102 on the bore 104 extends the course of the boundary layer 106 between the flow channels 1 1 1, 1 12 from the downstream end 102 ' of the hollow needle-shaped body 102 into the injection hole 104 into it.
Die in den beiden Strömungskanälen 1 1 1 , 1 12 jeweils fließenden Medien treffen dann auf die Einlaufkante 105 des zu bearbeitenden Spritzlochs 104 und treten durch das Spritzloch 104 des Düsenkörpers 100 nach außen hindurch. Dabei erfolgt die Verrundung der Einlauf- kante 105 der Bohrung bzw. des Spritzlochs 104. Durch den im Innern des hohlnadelförmigen Körpers 102 verlaufenden zweiten Strömungskanal 1 12 wird die Anströmung und somit die Verrundung des Spritzlochs 104 gesteuert, indem in beiden Strömungskanälen 1 1 1 , 1 12 unterschiedliche Drücke pi und p2 eingestellt werden, welche zudem noch zeitlich variierbar sind. Wenn zum Beispiel die Drücke pi und p2 so eingestellt bzw. gewählt werden, dass der im zweiten Strömungskanal 1 12 herrschende Druck p2 größer als der Druck p-ι im ersten Strömungskanal 1 1 1 ist, kann definiert der im Verlauf des erfindungsgemäßen The media flowing in the two flow channels 11 1, 12 each then strike the inlet edge 105 of the injection hole 104 to be processed and pass through the injection hole 104 of the nozzle body 100 to the outside. By the inside of the hollow needle-shaped body 102 extending second flow channel 1 12, the flow and thus the rounding of the injection hole 104 is controlled by in both flow channels 1 1 1, 1 12 different pressures pi and p 2 are set, which are also still temporally variable. If, for example, the pressures pi and p 2 are set or selected so that the prevailing in the second flow channel 1 12 pressure p 2 is greater than the pressure p-ι in the first flow channel 1 1 1, defined in the course of the invention
Verrundungsprozesses erfolgende Materialabtrag im dem zweiten Strömungskanal 1 12 zugewandten Bereich der Einlaufkante 105 erfolgen. Werden die Drücke pi und p2 hingegen so eingestellt bzw. gewählt, dass p2 kleiner als pi ist, so erfolgt in definierter Weise der Materi- alabtrag präferentiell in dem dem ersten Strömungskanal 1 1 1 zugewandten Bereich der Einlaufkante 105 des Spritzlochs 104. Rounding process taking place material removal in the second flow channel 1 12 facing region of the inlet edge 105 done. On the other hand, if the pressures pi and p 2 are set or selected such that p 2 is smaller than pi, the material removal takes place in a defined manner in the region of the inlet edge 105 of the injection hole 104 facing the first flow channel 11 1.
Eine Optimierung des erfindungsgemäßen Verfahrens, mit welcher das Material noch präziser und lokal definierter abgetragen werden kann, sieht vor, dass die jeweilige Konzentration von Schleifpartikeln in jedem der Strömungskanäle 1 1 1 , 1 12 individuell eingestellt wird. An optimization of the method according to the invention, with which the material can be removed even more precisely and locally defined, provides that the respective concentration of abrasive particles in each of the flow channels 1 1 1, 1 12 is set individually.
Bevorzugt wird dabei die jeweilige Partikeldichte in den Strömungskanälen 1 1 1 , 1 12 so gewählt, dass das fluide Medium, das entlang des im Innern des hohlnadelförmigen Körpers 102 verlaufenden zweiten Strömungskanals 1 12 fließt, eine hohe Partikeldichte aufweist, während demgegenüber das fluide Medium, das entlang des anderen Strömungskanals 1 1 1 fließt, eine niedrigere Partikeldichte aufweist. Dadurch entfaltet das entlang des zweiten Strömungskanals 1 12 fließende Medium eine größere abrasive Wirkung als das in dem anderen Strömungskanal 1 1 1 fließende Medium mit der niedrigeren Partikeldichte. Gemäß einerweiteren Optimierung des erfindungsgemäßen Verfahrens wird die Körnung der Schleifpartikel für jeden der Strömungskanäle 111, 112 unterschiedlich gewählt. Ebenso wird die Viskosität der Strömungsmedien für jeden der Strömungskanäle 111, 112 unterschiedlich gewählt. Preferably, the particular particle density in the flow channels 1 1 1, 1 12 is selected so that the fluid medium, which flows along the inside of the hollow needle-shaped body 102 extending second flow channel 1 12, has a high particle density, while the fluid medium, which flows along the other flow channel 1 1 1, has a lower particle density. As a result, the medium flowing along the second flow channel 1 12 develops a greater abrasive effect than the medium having the lower particle density flowing in the other flow channel 1 1 1. According to a further optimization of the method according to the invention, the grain size of the abrasive particles is chosen differently for each of the flow channels 111, 112. Likewise, the viscosity of the flow media for each of the flow channels 111, 112 is selected differently.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012211000.3A DE102012211000A1 (en) | 2012-06-27 | 2012-06-27 | Method for hydroerosive rounding of boreholes |
| DE102012211000.3 | 2012-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014000954A1 true WO2014000954A1 (en) | 2014-01-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2013/060057 Ceased WO2014000954A1 (en) | 2012-06-27 | 2013-05-15 | Method for the hydroerosive rounding of bore passages |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102012211000A1 (en) |
| WO (1) | WO2014000954A1 (en) |
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| EP3313613A4 (en) * | 2015-06-23 | 2019-02-27 | Dayco IP Holdings, LLC | POST-MOLDING PROCESSING METHODS OF A VENTURI DEVICE OR A NON-RETURN VALVE |
| WO2019228847A1 (en) | 2018-06-01 | 2019-12-05 | Basf Se | Method for determining the geometry of a raw part, which is shaped to form a finished part in a hydroerosive grinding method |
| WO2019228852A1 (en) | 2018-06-01 | 2019-12-05 | Basf Se | Method for the hydro-erosive grinding of components |
| WO2020064444A1 (en) | 2018-09-24 | 2020-04-02 | Basf Se | Method for surface processing of a component by flow grinding |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015200268B3 (en) | 2015-01-12 | 2016-06-09 | Schaeffler Technologies AG & Co. KG | Arrangement for measuring a force or a moment with a magnetic field sensor and with a magnetic field guide element |
Citations (3)
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|---|---|---|---|---|
| DE19914719A1 (en) * | 1999-03-31 | 2000-10-05 | Siemens Ag | Hydro-erosive bore edge rounding method |
| WO2005049273A1 (en) * | 2003-11-14 | 2005-06-02 | Robert Bosch Gmbh | Method and device for the hydro-erosive rounding of bore passages |
| EP1563954A1 (en) * | 2004-02-11 | 2005-08-17 | Delphi Technologies, Inc. | Process of machining of through-holes in objects and apparatus therefor |
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2012
- 2012-06-27 DE DE102012211000.3A patent/DE102012211000A1/en not_active Withdrawn
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2013
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19914719A1 (en) * | 1999-03-31 | 2000-10-05 | Siemens Ag | Hydro-erosive bore edge rounding method |
| WO2005049273A1 (en) * | 2003-11-14 | 2005-06-02 | Robert Bosch Gmbh | Method and device for the hydro-erosive rounding of bore passages |
| EP1563954A1 (en) * | 2004-02-11 | 2005-08-17 | Delphi Technologies, Inc. | Process of machining of through-holes in objects and apparatus therefor |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3313613A4 (en) * | 2015-06-23 | 2019-02-27 | Dayco IP Holdings, LLC | POST-MOLDING PROCESSING METHODS OF A VENTURI DEVICE OR A NON-RETURN VALVE |
| WO2019228847A1 (en) | 2018-06-01 | 2019-12-05 | Basf Se | Method for determining the geometry of a raw part, which is shaped to form a finished part in a hydroerosive grinding method |
| WO2019228852A1 (en) | 2018-06-01 | 2019-12-05 | Basf Se | Method for the hydro-erosive grinding of components |
| CN112437712A (en) * | 2018-06-01 | 2021-03-02 | 巴斯夫欧洲公司 | Water erosion grinding method for assembly |
| US11320812B2 (en) | 2018-06-01 | 2022-05-03 | Basf Se | Method for determining the geometry of a raw part, which is shaped to form a finished part in a hydroerosive grinding method |
| CN112437712B (en) * | 2018-06-01 | 2022-11-29 | 巴斯夫欧洲公司 | Water erosion grinding method for assembly |
| US11878392B2 (en) | 2018-06-01 | 2024-01-23 | Basf Se | Method for the hydro-erosive grinding of components |
| WO2020064444A1 (en) | 2018-09-24 | 2020-04-02 | Basf Se | Method for surface processing of a component by flow grinding |
| CN112752632A (en) * | 2018-09-24 | 2021-05-04 | 巴斯夫欧洲公司 | Method for surface machining of components by flow grinding |
| CN112752632B (en) * | 2018-09-24 | 2023-10-27 | 巴斯夫欧洲公司 | Surface machining of components by flow grinding |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012211000A1 (en) | 2014-01-02 |
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