EP1080249B1 - Verfahren zum einbringen mindestens einer nut in eine bohrung - Google Patents
Verfahren zum einbringen mindestens einer nut in eine bohrung Download PDFInfo
- Publication number
- EP1080249B1 EP1080249B1 EP00916759A EP00916759A EP1080249B1 EP 1080249 B1 EP1080249 B1 EP 1080249B1 EP 00916759 A EP00916759 A EP 00916759A EP 00916759 A EP00916759 A EP 00916759A EP 1080249 B1 EP1080249 B1 EP 1080249B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hole
- exposure
- light source
- photo
- light beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/02—Local etching
Definitions
- the invention relates to a method for introducing at least a groove in a hole.
- the object of the invention is therefore to specify a method with the grooves with much smaller tolerances in one Hole can be introduced.
- one photosensitive layer on the inner surface of the bore applied is initially provided.
- the application of the photosensitive layer can be done by spraying, dipping or by mechanical Apply using brushes, brushes or sponges.
- Liquid photosensitive ones are particularly suitable for this Materials such as photoresist.
- the photosensitive layer opposite below applied etching processes is insensitive. E.g. liquid Applied photoresist, so is a usable photosensitive Layer only after a certain drying time given. After that, the exposure of the photosensitive Layer according to the desired course of the grooves be made.
- the exposure patterns are the same adapt given photosensitive layer such that at a exposed layer and the exposed areas developed the unexposed areas in a photonegative layer and the underlying areas are exposed.
- the exposed photosensitive Layer developed using suitable chemicals, the exposed or unexposed areas of the photo layer removed become.
- Single-stage development processes are preferred chosen, but can also in the same way multi-stage development processes are provided.
- an etchant is introduced into the bore.
- the etchant is left in the hole for a certain period of time and then out of the hole, for example by tipping over or removed by suction.
- the depth of the groove depends on it on the strength of the etchant as well as on the duration of the Remain in the hole. Because the photosensitive layer is insensitive to the etchant is only on the Places where there is no photosensitive layer etched. After removing the etchant, finally also the remaining parts of the photosensitive layer removed, for example, by treatment with solvent.
- the etched areas can be after the etching deepened by mechanical grinding or milling. The latter can be done immediately after removing the etchant or after removing the remaining photosensitive Layer.
- the exposure can either be by means of a light beam generating light source in conjunction with at least a light beam deflecting, displaceable in the bore, rotating mirror or by means of a light source, those in a transparent inner cylinder with exposure pattern generating shading is housed, or by means of a light sound generator that is inserted into the bore, rotatable and movable point light source.
- a light beam generating light source in conjunction with at least a light beam deflecting, displaceable in the bore, rotating mirror or by means of a light source, those in a transparent inner cylinder with exposure pattern generating shading is housed, or by means of a light sound generator that is inserted into the bore, rotatable and movable point light source.
- the optical waveguide in particular a tapered one Be provided at the end of the light beam is deflected laterally.
- the optical fiber also have an axial radiation characteristic and in the hole must be kinked. Finally, it can be used to generate of an exposure pattern the light source depending on the position of
- FIG. 1 there is a bore 1 introduced into a solid, for example a valve housing 2.
- the inner surface 3 of the bore 1 is, for example by grinding, then polishing and finally Anodized surface treatment. The result of this step is shown in Figure la.
- a photosensitive layer 4 is placed on the surface-treated inside 3 of the bore 1 applied. This is done, for example, by spraying on liquid, photosensitive paint on the inner wall 3 of the bore 1.
- the Lacquer contains solvents that are used during the drying process evaporate. After drying, the varnish forms a hardened, photosensitive layer which is sensitive to acids is resistant, but can be removed by solvents can. The result of this process step is in Figure 1b shown.
- the next step is to develop the photosensitive Layer 3 as well as the etching of the grooves. This is done on one page the bore 1 an inlet 9 and on the other side of the Bore 1 an outlet 10 each with the same cross section like the bore 1 to the valve housing 2 using Sealing rings 11 attached. Then the hole 1 with a Developer liquid (e.g. strong lye) for a specific, sufficient to develop the photosensitive layer 3 Flushed time. Then the hole is the same Way with an etchant (strong acid) for a certain Flushed time. The length of time depends on how deeply etched shall be. After the etching, a solvent is flushed in, to remove the different layers of paint and remove. Finally, the hole 1 is, for example cleaned with a detergent.
- a Developer liquid e.g. strong lye
- an etchant strong acid
- An introduction of detergent or another irrigation solution can also be used between developer and etchant and / or etchant and solvent be flushed into hole 1.
- the inlet 9 and the sequence 10 are self-evident to those used Liquids resistant.
- Figure 1d shows the Condition before the introduction of the solvent.
- the grooves 12 by grinding (or alternatively by milling) in tolerance-tolerant Distance from the etched groove edges - recesses 13 educational - deepened.
- Figure shows the state after deepening 1e.
- the exposure takes place by means of a rod-shaped inserted into the bore 1
- Light source 14 surrounded by a transparent cylinder 15 is.
- In the present embodiment becomes a photo negative varnish as a photosensitive layer 4 used so that the shadows 16 mark the places where a groove is to be etched later. at In contrast, using a photo positive varnish would remove these spots not be shadowed.
- the transparent cylinder 15 contains formations 17, which act as a stop when inserted into serve the hole 1. This will determine the exact location of the exposure pattern reproducibly set.
- the light source 14 is for a specific one Time that is sufficient for the exposure of the photosensitive Layer 4 turned on. After switching off the light source 14, the light source 14 and the transparent Cylinder 15 pulled out of hole 1 again.
- a light beam 19 is generated by a laser unit 18 and parallel to the longitudinal axis of hole 1 in hole 1 guided.
- a shaft 20 On which are located in the bore 1 End a mirror 21 at 45 ° to the longitudinal axis of the Hole 1 is arranged.
- the shaft 20 is rotatable so that with one revolution of the shaft 20, the inner surface the illuminated ring enclosing the hole 1 is generated.
- Angles are used, however an angle of 45 ° results in a more homogeneous illumination than deviating angles.
- the Shaft 20 can thereby with means not shown in the drawing be provided for fine adjustment of the position.
- the embodiment according to FIG changed that instead of a single mirror three individual mirrors 22 are provided.
- the three mirrors 22 are in a crystal-clear, cylindrical synthetic resin body (cylinder 23) at an angle of 45 ° to the longitudinal axis as well offset from each other in the axial and radial directions cast.
- the cylinder 23 is from one side inserted into hole 1 while from the other side a light beam 19 of the width of the bore 1 into the bore 1 is directed.
- the advantage of the arrangement according to FIG. 4 compared to the arrangement of Figure 3 is that the Cylinder 23 is not like the shaft 20 of Figure 3 in the bore 1 must be axially shifted to exposures for multiple Carry out grooves in different places with high accuracy.
- FIG. 5 The embodiment of Figure 5 is compared to the embodiment modified according to Figure 3 so that a shaft 24 at its end in the bore 1 instead of one Flat mirror 21 as in Figure 3 a truncated cone 25 with mirrored Has lateral surfaces.
- the lateral surfaces point an angle of 45 ° to the longitudinal axis of the bore 1.
- a light beam 19 generated by the light source 18 is thereby on the lateral surfaces of the truncated cone 25 by 90 ° in the direction deflected the inner surface of the bore 1 and generated there the exposure pattern 8.
- the point light source 26 can, for example, by a miniature light bulb or be given a light emitting diode and for sharp limitation of the exposure field have diaphragms 27 and 28.
- the diaphragms 27 and 28 are perpendicular to the inner surface of hole 1 and perpendicular to the longitudinal axis of the hole 1.
- the point light source 26 is via a feed line 29 and a Switch 30 connected to a power supply 31.
- the Point light source is therefore introduced into hole 1, brought into the appropriate position and by means of the switch 30 lit up.
- apparatuses are used, which for example are rigidly connected to the point light source 26 and which, for example, enclose the feed line 29.
- the light from a light source 32 by means of a Optical fiber 33, which kinks at right angles in the bore 1 is on the sections of the inner wall to be exposed Drilled hole 1.
- a Optical fiber 33 which kinks at right angles in the bore 1 is on the sections of the inner wall to be exposed Drilled hole 1.
- the kinked Light guide 33 can be a radially circumferential exposure pattern in the hole while moving the Light guide 33 produce an axial pattern in the longitudinal direction leaves.
- an optical waveguide formed at its end in the bore 1 in such a way that the end has a frustoconical recess 37 having.
- the recess 37 faces the light guide 33 boundary surface at an angle of 45 ° to the longitudinal axis hole 1. That generated by a light source 34 Light is emitted by the light guide 35 as a light beam 36 the recess 37 passed and from there at a right angle to Longitudinal axis projected onto the inner surface of the bore 1.
- the lateral surface of the recess 37 can be mirrored if necessary his.
- the deflected light in turn turns exposure patterns 8 on the photosensitive 4 layer of the hole 1 generated.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Description
- Figur 1
- eine allgemeine Ausführungsform eines erfindungsgemäßen Verfahrens einschließlich eines Belichtungsschrittes,
- Figur 2
- eine erste Ausführungsform des Belichtungsschrittes,
- Figur 3
- eine zweite Ausführungsform des Belichtungsschrittes,
- Figur 4
- eine dritte Ausführungsform des Belichtungsschrittes,
- Figur 5
- eine vierte Ausführungsform des Belichtungsschrittes,
- Figur 6
- eine fünfte Ausführungsform des Belichtungsschrittes,
- Figur 7
- eine sechste Ausführungsform des Belichtungsschrittes, und
- Figur 8
- eine siebte Ausführungsform des Belichtungsschrittes.
Claims (10)
- Verfahren zum Einbringen mindestens einer Nut in eine Bohrung mit den Verfahrensschritten:a) Aufbringen einer fotoempfindlichen Schicht (4) auf die Innenfläche (3) der Bohrung (1);b) Belichtung der fotoempfindlichen Schicht (4) nach einem dem gewünschten Verlauf der Nut(en) (12) entsprechenden Belichtungsmuster (8);c) Entfernen von durch das Belichtungsmuster (8) ausgewählten Teilen der fotoempfindlichen Schicht (4) mittels fotochemischer Entwicklung;d) Einbringen eines Ätzmittels in die Bohrung (1) zum Ätzen an den von der fotoempfindlichen Schicht (4) nicht bedeckten Stellen der Bohrung (1);e) Entfernen der verbleibenden Teile der fotoempfindlichen Schicht (4).
- Verfahren nach Anspruch 1, bei dem die Innenfläche (3) der Bohrung (1) vor dem Aufbringen der fotoempfindlichen Schicht (4) oberflächenbehandelt wird.
- Verfahren nach einem der vorherigen Ansprüche, bei dem die geätzten Stellen durch mechanisches Schleifen vertieft werden.
- Verfahren nach einem der Ansprüche 1 bis 3, bei dem die Belichtung mittels einer einen Lichtstrahl (19) erzeugenden Lichtquelle (18) und mindestens eines den Lichtstrahl (18) umlenkenden, in der Bohrung verschiebbaren, rotierenden Spiegels (21, 22) erfolgt.
- Verfahren nach einem der Ansprüche 1 bis 3, bei dem die Belichtung mittels einer einen Lichtstrahl (19) erzeugenden Lichtquelle (18) und mindestens eines den Lichtstrahl (19, 36) umlenkenden, in der Bohrung (1) bewegbaren Lichtleiters (33, 35) erfolgt.
- Verfahren nach Anspruch 5, bei dem der Lichtleiter (35) ein nach innen spitz zulaufendes Ende (37) aufweist, an dem der Lichtstrahl (36) seitlich abgelenkt wird.
- Verfahren nach Anspruch 5, bei dem der Lichtleiter (33) in der Bohrung (1) abknickt ist.
- Verfahren nach einem der Ansprüche 1 bis 3, bei dem die Belichtung mittels einer Lichtquelle (14) erfolgt, die in einem transparenten Innenzylinder (15) mit das Belichtungsmuster erzeugenden Abschattungen (16) untergebracht ist.
- Verfahren nach einem der Ansprüche 1 bis 3, bei dem die Belichtung mittels einer in die Bohrung (1) eingeführten, dreh-und verschiebbaren Punktlichtquelle (26) erfolgt.
- Verfahren nach einem der vorherigen Ansprüche, bei dem zur Erzeugung des Belichtungsmusters die Lichtquelle einoder ausgeschaltet wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19907927 | 1999-02-24 | ||
DE19907927 | 1999-02-24 | ||
PCT/DE2000/000519 WO2000050665A1 (de) | 1999-02-24 | 2000-02-24 | Verfahren zum einbringen mindestens einer nut in eine bohrung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1080249A1 EP1080249A1 (de) | 2001-03-07 |
EP1080249B1 true EP1080249B1 (de) | 2003-09-03 |
Family
ID=7898678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00916759A Expired - Lifetime EP1080249B1 (de) | 1999-02-24 | 2000-02-24 | Verfahren zum einbringen mindestens einer nut in eine bohrung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1080249B1 (de) |
DE (1) | DE50003510D1 (de) |
WO (1) | WO2000050665A1 (de) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3751313A (en) * | 1971-08-23 | 1973-08-07 | Us Army | Method of forming rifling in a gun barrel by chemical milling |
SU1082863A1 (ru) * | 1980-07-22 | 1984-03-30 | Витебский технологический институт легкой промышленности | Способ химического фрезеровани деталей |
EP0596110A1 (de) * | 1990-04-25 | 1994-05-11 | Kabushiki Kaisha Komatsu Seisakusho | Verfahren zur behandlung von kohren |
US5855802A (en) * | 1996-05-30 | 1999-01-05 | International Business Machines Corporation | Method and apparatus for forming a tubular article having a perforated annular wall |
-
2000
- 2000-02-24 WO PCT/DE2000/000519 patent/WO2000050665A1/de active IP Right Grant
- 2000-02-24 DE DE50003510T patent/DE50003510D1/de not_active Expired - Fee Related
- 2000-02-24 EP EP00916759A patent/EP1080249B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50003510D1 (de) | 2003-10-09 |
EP1080249A1 (de) | 2001-03-07 |
WO2000050665A1 (de) | 2000-08-31 |
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