EP1588801A1 - Verfahren und Vorrichtung zum Bearbeiten einer Durchgangsöffnung mit einem Abtragungsfluid - Google Patents
Verfahren und Vorrichtung zum Bearbeiten einer Durchgangsöffnung mit einem Abtragungsfluid Download PDFInfo
- Publication number
- EP1588801A1 EP1588801A1 EP05004133A EP05004133A EP1588801A1 EP 1588801 A1 EP1588801 A1 EP 1588801A1 EP 05004133 A EP05004133 A EP 05004133A EP 05004133 A EP05004133 A EP 05004133A EP 1588801 A1 EP1588801 A1 EP 1588801A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- grinding
- passage opening
- flow
- back 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
Images
Classifications
-
- 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
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
Definitions
- the invention relates to a method for processing a Through opening, in particular a valve channel, according to The preamble of claim 1, wherein a Abtragungsfluid on one side of the through hole with a Grinding pressure and on the other side of the passage opening is acted upon by a counter-pressure and the Abtragungsfluid under material removal in the passage opening is added in flow.
- the invention further relates to a device for processing a passage opening with a Abtragungsfluid under flow according to the preamble of claim 9, with a grinding pressure generating device for generating a Abrasive pressure in the ablation fluid on one side of the passage opening, a back pressure generating means for generating a back pressure in the ablation fluid on the other Side of the through hole and a control to the Controlling the grinding pressure with the grinding pressure generating device communicates.
- the back pressure either by means of a arranged on the downstream side Aperture or by means of a bubble or arranged there Membrane memory generated.
- a disadvantage of this known Back pressure grinding processes can be comparatively uncontrolled Pressure conditions, in particular counterpressure conditions, at the beginning of the grinding process, the too correspondingly uncontrolled flow rates and thus Removal rates in the initial phase of the grinding process being able to lead.
- the object of the invention is to provide a method and a device for processing a through hole, with which the passage opening can be adjusted with particularly high accuracy.
- the inventive Method characterized in that the first Counterpressure is set approximately equal to the grinding pressure and then, to generate the flow, a pressure difference set between the grinding pressure and the back pressure becomes.
- a basic idea of the invention is that at the beginning the processing of the pressure on both sides of the passage opening, which can also be referred to as a channel, at least is set almost identical.
- the processing no or at best a small one Pressure difference along the passage opening, and consequently is the flow rate of the ablation fluid in the passage opening and therefore also the removal rate at the passage opening at the beginning of processing equal Zero or at most very low.
- one of Zero different pressure difference between the grinding pressure also known as processing pressure or form can be adjusted, and the back pressure.
- the inventive method is particularly suitable for the machining of control and / or nozzle bores, in particular on components of fuel injection valves.
- the method for flow adjustment serve the passage opening.
- the procedure also advantageous in that at the beginning of processing at least approximately constant pressure conditions often a particularly high increase in the flow of the Ablation fluid occurs and the increase with increasing Processing time is getting smaller, as more and more material at the grinding pressure-side edge of the passage opening must be removed.
- the inventive method but guarantees at the beginning of the grinding process particularly well defined flow conditions, so that the Flow is particularly accurate adjustable.
- the ablation fluid may basically be a arbitrary fluid continuum act on the material surrounding the passage opening under flow has a erosive effect. It is particularly preferred that the ablation fluid is a hydroerosive grinding fluid with a carrier liquid and contained therein Abrasive particles is. Under hydroerosive grinding fluids, both grinding liquids with a water-based carrier fluid as well those with an oil-based carrier fluid or a other basis. In particular, that can Hydroerosive Abtragungsfluid according to the invention also anhydrous be.
- the abrasive portion of the abrasive abrasive particles in the grinding fluid is suitably adjusted so that the widest possible input tolerance range for the diameter and / or flow of the Through hole at suitable processing times for the Grinding process can be covered.
- that can Abtragungsfluid be chosen such that in the course of Machining on average a flow increase, i. a Increase the flow rate of the ablation fluid, from about 7% to 15% is achieved, which is preferably independent of the channel geometry is provided.
- a particularly preferred embodiment of the invention is characterized in that before setting the pressure difference the back pressure together with the grinding pressure started up becomes.
- the pressures on both sides of the passage opening become too Start of the machining process in parallel, i. simultaneously constructed, with the grinding pressure and the back pressure already set at startup at least approximately the same.
- the pressure difference afterwards to the equalization of backpressure and To generate grinding pressure by the counter pressure the grinding pressure is lowered, wherein the Grinding pressure in particular remains constant. Especially however, it is preferred that for generating the pressure difference for the flow of grinding pressure initially opposite to the Counterpressure is increased. Suitably, the Back pressure kept constant.
- Such a procedure can process technology in particular by means of piston pumps particularly easy to be realized.
- At least a characteristic of the passage opening in particular a flow rate whose time change, a diameter, a material removal rate, a pressure and / or a Wall tilt angle, is determined and that the pressure difference set depending on the at least one characteristic becomes.
- the temporal change of Flow rate of the ablation fluid in the passage opening be determined. But it can also be the wall tilt angle at the grinding pressure and / or back pressure side Edge of the through hole in another way directly or determined indirectly.
- the temporal Change in flow rate i. their temporal Derivation, can be considered that at one tapered outward channel, i.
- the pressure difference can be largely prevented that parts of the upper flow tolerance band and / or such with conically outwardly opening channel geometry through short processing times to a faulty flow value be ground and thereby out of the production process must be discharged.
- parts of the upper flow tolerance band and / or such with conically outwardly opening channel geometry through short processing times to a faulty flow value be ground and thereby out of the production process must be discharged.
- conical parts with parts Outwardly tapered channel geometry to the grinding times become long, whereby possibly in a piston pump stored Abtragungsfluidmenge not to the termination
- the processing is sufficient and thus the processing is interrupted must be, resulting in a substantial extension the processing time as well as an increased reject rate can lead.
- a particularly useful embodiment of the invention Method is characterized in that the Pressure difference initially to a predetermined, first Pressure differential value set and the characteristic determined is and that the pressure difference then characteristic dependent is set.
- this embodiment takes place the determination of the parameter and in particular the Flow properties of the passage opening already on Start of process, preferably immediately after setting the first pressure difference value.
- the process is through already controllable in the initial phase of the grinding process, whereby passage openings with a particularly wide Component tolerance reliably processed to a target value can be.
- the first Pressure difference value relative to the grinding pressure 5 to 15%, in particular about 10%.
- Such a pressure difference value enables a reliable characteristic determination at at the same time sufficiently low initial ablation rate.
- the pressure difference is inverse to the flow rate and / or the diameter is set. This includes is understood that the pressure difference at low flow rate and / or small diameter of the passage opening enlarged and at high flow rate and / or reduced in diameter. This will be a particularly effective control of the machining process allows.
- the Direction of the flow in the passage opening in particular is reversed characteristic size dependent.
- This can be especially true
- the through hole are made, i. at a Channel, the diameter of which is larger than its back pressure side diameter is.
- the counterpressure side i. the exhaust side of the Through hole processed, resulting in a particularly effective Enlargement of the passage opening leads.
- the to Evidence of an outwardly tapered channel geometry and the Reversal of the flow used characteristic can in particular the temporal change of the flow rate and / or the Wall tilt angle at the counterpressure edge of the Be passage opening.
- the device according to the invention can in particular for Implementation of the method of the invention serve, whereby achieved the advantages described in this context become.
- the device according to the invention is characterized characterized in that the control with the counter-pressure generating means for controlling the back pressure in communication stands. This allows independent control of the Grinding pressure and the back pressure can be realized. Prefers these pressures can also be at the beginning of the processing, initially set flow rate independent. This results in a particularly precise processing of the passage opening er Camill. Under the control of the pressures can According to the invention, rules are also understood.
- a particularly preferred embodiment of the invention Device is characterized in that a Characteristic detection device for determining at least a characteristic of the passage opening is provided, and that the characteristic quantity detection device for the characteristic-dependent Controlling a pressure difference between the Grinding pressure and back pressure with the controller in connection stands.
- the at least one characteristic it can in particular one of the in connection with the invention Act described characteristics, whereby with the device according to the invention a controller the pressure difference and, consequently, the flow rate of the ablation fluid depending on the dimensions and the Geometry of the passage opening can be done.
- FIG. 1 A device according to the invention is shown in FIG.
- the device has a reservoir 22 for Absorption of ablation fluid.
- the reservoir 22 is about a first obturator 23 with a grinding pressure piston pump 30 of a grinding pressure generating device in fluid communication, which has a constant flow over time and / or a time constant pressure of the ablation fluid can generate.
- the grinding pressure piston pump 30 has a spindle 32, that of a motor 33 designed as a stepper motor is driven and which together with a hydraulic cylinder 34 a piston 31 of the grinding pressure piston pump 30th drives.
- a flow sensor 25 a not shown Characteristics detecting device and a second obturator 24 is the Schleiftikkolbenpume 30 by a Inlet side 3 of a through hole 10 in a component. 1 with this passage opening 10 in fluid communication.
- a grinding pressure sensor 26 for determining the grinding pressure provided upstream and inlet side of the component 1.
- the located in the component 1 and designed as a bore Through opening 10 is the inventive Method by flowing erosion fluid in particular rounded on the inlet side at an inlet side inlet edge.
- a counter-pressure generating device in conjunction, for generating an outlet side back pressure serves.
- the counter-pressure piston pump 40 is hydraulically actuated educated. Between the third shut-off member 44 and the back pressure piston pump 40 is a back pressure sensor 46 for Determining the back pressure arranged. About a fourth Shut-off valve 45 is the counter-pressure piston pump 40 for emptying with a drain line 50 in connection.
- the illustrated device can in particular for constant pressure processing and / or for constant volumetric flow processing serve the passage opening 10.
- the constant pressure processing become Start of processing by means of the grinding pressure piston pump 30 and the counter-pressure piston pump 40, the pressures on the inlet side 3 and at the outlet side 5 of the component 1 in parallel constructed, whereby in the passage opening 10 still no flow of Abtragungsfluids is generated and thus no effective processing of the passage opening 10 takes place.
- the back pressure sensor 46 is the back pressure buildup stopped and only the inlet side, i.e.
- the different for the different processing pressures Target flows are controlled by a controller each pressure ratio calculated individually.
- a shutdown criterion may be a value supplied by the flow sensor 25 be used.
- the constant volumetric flow processing are also used to start editing by means of the grinding pressure piston pump 30 and the Backpressure piston pump 40, the grinding pressure at the inlet side 3 and the back pressure on the outlet side 5 in parallel constructed, whereby no effective processing takes place.
- the back pressure build-up stopped and the inlet side grinding pressure is further increased until the formation of a pressure difference a grinding pressure is achieved, which is only slightly is higher than the back pressure, causing a comparatively low material removal is ensured.
- this Pressure ratio is by means of the flow sensor 25 a Determination of flow, i. the flow rate is performed.
- each pressure ratio can be calculated individually.
- a shutdown criterion can one from the grinding pressure sensor 26, from Back pressure sensor 46 and / or from the flow rate sensor 25 delivered value can be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
- Fig. 1
- eine erfindungsgemäße Vorrichtung zum Bearbeiten einer Durchgangsöffnung.
Claims (10)
- Verfahren zum Bearbeiten einer Durchgangsöffnung (10), insbesondere eines Ventilkanals, bei demein Abtragungsfluid auf einer Seite der Durchgangsöffnung (10) mit einem Schleifdruck und auf der anderen Seite der Durchgangsöffnung (10) mit einem Gegendruck beaufschlagt wird unddas Abtragungsfluid unter Materialabtragung in der Durchgangsöffnung (10) in Strömung versetzt wird,dass zunächst der Gegendruck in etwa gleich dem Schleifdruck eingestellt wird unddass anschließend zum Erzeugen der Strömung eine Druckdifferenz zwischen dem Schleifdruck und dem Gegendruck eingestellt wird.
- Verfahren nach Anspruch 1,
dadurch gekennzeichnet, dass vor dem Einstellen der Druckdifferenz der Gegendruck zusammen mit dem Schleifdruck hochgefahren wird. - Verfahren nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, dass zum Erzeugen der Druckdifferenz für die Strömung der Schleifdruck zunächst gegenüber dem Gegendruck erhöht wird. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass mindestens eine Kenngröße der Durchgangsöffnung (10), insbesondere eine Durchflussrate, deren zeitliche Änderung, ein Durchmesser, eine Materialabtragungsrate, ein Druck und/oder ein Wandneigungswinkel, ermittelt wird und
dass die Druckdifferenz in Abhängigkeit der mindestens einen Kenngröße eingestellt wird. - Verfahren nach Anspruch 4,
dadurch gekennzeichnet, dass die Druckdifferenz zunächst auf einen vorher bestimmten, ersten Druckdifferenzwert eingestellt und die Kenngröße ermittelt wird, und
dass die Druckdifferenz anschließend kenngrößenabhängig eingestellt wird. - Verfahren nach Anspruch 5,
dadurch gekennzeichnet, dass der erste Druckdifferenzwert relativ zum Schleifdruck 5% bis 15%, insbesondere etwa 10% beträgt. - Verfahren nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, dass die Druckdifferenz invers zur Durchflussrate und/oder dem Durchmesser eingestellt wird. - Verfahren nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet , dass die Richtung der Strömung in der Durchgangsöffnung insbesondere kenngrößenabhängig umgekehrt wird. - Vorrichtung zum Bearbeiten einer Durchgangsöffnung (10) mit einem Abtragungsfluid unter Strömung, insbesondere zum Durchführen des Verfahrens nach einem der Ansprüche 1 bis 8, miteiner Schleifdruckerzeugungseinrichtung zum Erzeugen eines Schleifdrucks im Abtragungsfluid auf einer Seite der Durchgangsöffnung (10),einer Gegendruckerzeugungseinrichtung zum Erzeugen eines Gegendrucks im Abtragungsfluid auf der anderen Seite der Durchgangsöffnung (10) undeiner Steuerung, die zum Steuern des Schleifdrucks mit der Schleifdruckerzeugungseinrichtung in Verbindung steht,dass die Steuerung zudem mit der Gegendruckerzeugungseinrichtung zum Steuern des Gegendrucks in Verbindung steht.
- Vorrichtung nach Anspruch 9,
dadurch gekennzeichnet, dass eine Kenngrößenerfassungseinrichtung zum Ermitteln mindestens einer Kenngröße der Durchgangsöffnung (10) vorgesehen ist, und
dass die Kenngrößenerfassungseinrichtung zum kenngrößenabhängigen Steuern einer Druckdifferenz zwischen dem Schleifdruck und dem Gegendruck mit der Steuerung in Verbindung steht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004019356 | 2004-04-21 | ||
DE102004019356A DE102004019356B3 (de) | 2004-04-21 | 2004-04-21 | Verfahren und Vorrichtung zum Bearbeiten einer Durchgangsöffnung mit einem Abtragungsfluid |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1588801A1 true EP1588801A1 (de) | 2005-10-26 |
EP1588801B1 EP1588801B1 (de) | 2007-08-01 |
Family
ID=34895590
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05004133A Not-in-force EP1588801B1 (de) | 2004-04-21 | 2005-02-25 | Verfahren und Vorrichtung zum Bearbeiten einer Durchgangsöffnung mit einem Abtragungsfluid |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1588801B1 (de) |
AT (1) | ATE368548T1 (de) |
DE (2) | DE102004019356B3 (de) |
ES (1) | ES2290802T3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104588962A (zh) * | 2014-12-03 | 2015-05-06 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | 一种发动机孔式喷油嘴单孔挤压研磨装置及使用方法 |
CN110238708A (zh) * | 2019-06-20 | 2019-09-17 | 中国工程物理研究院激光聚变研究中心 | 一种磁流变抛光机床磁流变液循环系统 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59156661A (ja) * | 1983-02-26 | 1984-09-05 | Inoue Japax Res Inc | 研磨装置 |
DE19700304C1 (de) * | 1997-01-08 | 1998-07-23 | Sonplas Gmbh Planung Montage U | Verfahren und Vorrichtung zur Einstellung des Durchflusses von Bauteilöffnungen |
DE19941472A1 (de) * | 1999-09-01 | 2001-03-15 | Bosch Gmbh Robert | Verfahren zur Kalibrierung von Drosselbohrungen, insbesondere in Einspritzventilen für Brennkraftmaschinen, und Vorrichtung zur Durchführung des Verfahrens |
WO2003035325A1 (en) * | 2001-09-21 | 2003-05-01 | Extrude Hone Corporation | Abrasive flow machining apparatus and method |
-
2004
- 2004-04-21 DE DE102004019356A patent/DE102004019356B3/de not_active Expired - Fee Related
-
2005
- 2005-02-25 ES ES05004133T patent/ES2290802T3/es active Active
- 2005-02-25 DE DE502005001120T patent/DE502005001120D1/de active Active
- 2005-02-25 EP EP05004133A patent/EP1588801B1/de not_active Not-in-force
- 2005-02-25 AT AT05004133T patent/ATE368548T1/de not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59156661A (ja) * | 1983-02-26 | 1984-09-05 | Inoue Japax Res Inc | 研磨装置 |
DE19700304C1 (de) * | 1997-01-08 | 1998-07-23 | Sonplas Gmbh Planung Montage U | Verfahren und Vorrichtung zur Einstellung des Durchflusses von Bauteilöffnungen |
DE19941472A1 (de) * | 1999-09-01 | 2001-03-15 | Bosch Gmbh Robert | Verfahren zur Kalibrierung von Drosselbohrungen, insbesondere in Einspritzventilen für Brennkraftmaschinen, und Vorrichtung zur Durchführung des Verfahrens |
WO2003035325A1 (en) * | 2001-09-21 | 2003-05-01 | Extrude Hone Corporation | Abrasive flow machining apparatus and method |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 009, no. 007 (M - 350) 12 January 1985 (1985-01-12) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104588962A (zh) * | 2014-12-03 | 2015-05-06 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | 一种发动机孔式喷油嘴单孔挤压研磨装置及使用方法 |
CN110238708A (zh) * | 2019-06-20 | 2019-09-17 | 中国工程物理研究院激光聚变研究中心 | 一种磁流变抛光机床磁流变液循环系统 |
CN110238708B (zh) * | 2019-06-20 | 2024-01-23 | 中国工程物理研究院激光聚变研究中心 | 一种磁流变抛光机床磁流变液循环系统 |
Also Published As
Publication number | Publication date |
---|---|
ES2290802T3 (es) | 2008-02-16 |
EP1588801B1 (de) | 2007-08-01 |
DE102004019356B3 (de) | 2005-09-29 |
DE502005001120D1 (de) | 2007-09-13 |
ATE368548T1 (de) | 2007-08-15 |
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