EP2976178A1 - Pastöses schutzmittel als rückraumschutz bei einem laserbohren, rückraumschutzvorrichtung, verfahren zum erzeugen einer durchgangsbohrung und vorrichtung zur durchführung solch eines verfahrens - Google Patents
Pastöses schutzmittel als rückraumschutz bei einem laserbohren, rückraumschutzvorrichtung, verfahren zum erzeugen einer durchgangsbohrung und vorrichtung zur durchführung solch eines verfahrensInfo
- Publication number
- EP2976178A1 EP2976178A1 EP14702559.7A EP14702559A EP2976178A1 EP 2976178 A1 EP2976178 A1 EP 2976178A1 EP 14702559 A EP14702559 A EP 14702559A EP 2976178 A1 EP2976178 A1 EP 2976178A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- pasty
- protective agent
- cavity
- ceramic particles
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/18—Working by laser beam, e.g. welding, cutting or boring using absorbing layers on the workpiece, e.g. for marking or protecting purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
- B23K26/382—Removing material by boring or cutting by boring
- B23K26/389—Removing material by boring or cutting by boring of fluid openings, e.g. nozzles, jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
Definitions
- Backspace protection device method for creating a through-hole and apparatus for carrying out such a method
- the invention relates to a pasty protective agent, which serves as back space protection during laser drilling, a back space protection device, a method for generating a
- the invention relates to the field of making nozzle bores, particularly for fuel injectors.
- a method for producing at least one through-hole and a device for carrying out such a method are known.
- the method uses a laser beam which is directed from the outside to a wall which limits a cavity of a workpiece.
- a pasty protective agent is introduced into the cavity of a workpiece.
- the pasty protective agent is in the extension of the exiting through the through hole laser beam in front of a
- the pasty protective agent may be formed on the basis of a ceramic powder in aqueous solution or in a non-aqueous dispersion, in the metallic particles or
- the pasty protective agent according to the invention with the features of claim 1, the inventive back space protection device according to claim 9, the inventive method with the features of claim 10 and the device according to the invention with the features of claim 11 have the advantage that the production of a through hole in a wall of the workpiece is further improved.
- the viscosity of the pasty protective agent can be adjusted so that leakage from through holes is avoided and, secondly, the required absorption and scattering properties can be ensured.
- the paste-like protective agent can be used by continuous supply into the cavity of the workpiece as a back space protection during laser drilling of through holes, in particular nozzle holes.
- the composition of the pasty protective agent takes place on the basis of ceramic particles and the organic thickening agent.
- the viscosity of the pasty protective agent can be raised so far that leakage from through holes is avoided.
- the higher viscosity can also be used for the homogeneous stabilization of the ceramic particles in an aqueous system.
- the use of pasty protective agent has the advantage that the use is largely independent of the shape of the workpiece, in particular of the cavity of the workpiece, so that the protective means can be used in particular for each nozzle type.
- the pasty protective agent is made of the
- Polyethylene oxide (PEO), depending on the selected ceramic filler of the dispersant sodium polyphosphate and one or more ceramic fillers together.
- CaC0 3 mica, in particular in the form of a 100% crystalline, finely ground muscovite product, ZrO 2 and / or TiO 2 can be used as ceramic fillers or ceramic particles.
- Polyethylene oxide preferably takes on the role of the thickening agent and is preferably dosed between 3 and 8% by mass with respect to the amount of particles to ensure good rheological properties for continuous dosing. In particular, 4 to 6% by mass can be added. Polyethylene oxide is also particularly well suited to produce higher viscosity aqueous mixtures without inclusion of air bubbles.
- Sodium polyphosphate is preferably used as a dispersing aid for Zr0 2 , CaC0 3 and Ti0 2 .
- Mica is preferably processed without a dispersing aid with the aid of polyethylene oxide to form a stable suspension.
- the preparation of the pasty protective agent is preferably carried out via a dissolver, wherein the ceramic particles are slowly incorporated into the water. If a dispersing aid is used, it is preferably added before the addition of the thickening agent.
- the effectiveness of the respective filler can be adjusted for example by means of extinction curves and also detected accordingly. After drilling one or more through-holes remaining in the cavity pasty protective agent can be flushed out. Residuals remaining on the bore wall are generally unproblematic.
- the introduced into the cavity of the workpiece pasty protective means forms a back space protection device in the form defined thereby.
- a conveying device which conveys the paste-like protective agent is partially introduced into the cavity of the workpiece, that a working part of the
- Fig. 1 shows a workpiece and a device for carrying out a method for
- Fig. 1 shows a device 1 and a workpiece 2 in a partial, schematic sectional view according to an embodiment of the invention.
- the device 1 serves to carry out a method for generating
- the workpiece 2 may in particular be a nozzle body 2 of a fuel injection valve.
- the method performed by the device 1 is particularly suitable for the design of through holes 3, 4, which are designed as nozzle bores 3, 4 of a nozzle body 2.
- the device 1 is particularly suitable for carrying out such a method.
- the device 1 according to the invention and the method according to the invention are also suitable for other applications.
- two through holes 3, 4 are shown.
- the number of such through holes 3, 4 can be set differently in relation to the particular application.
- the device 1 has a schematically illustrated laser device 5 and a conveying device 6 shown schematically.
- the conveying device 6 is shown here as an example as a screw conveyor 6, but not limited to this embodiment.
- the laser device 5 In operation, the laser device 5 generates a laser beam 7, which is directed in a direction 8 on the workpiece 2.
- the laser beam 7 to the location of
- the laser beam 7 in this case only in the wall 9 a
- the generated through holes 3, 4 open into the cavity 12 so that, for example, fuel through these through holes 3, 4 can be injected into a combustion chamber of an internal combustion engine or the like when the workpiece 2 is used as the nozzle body 2 of a fuel injection valve.
- the conveying device 6 promotes a pasty protective agent 13 in the cavity 12.
- the pasty protective means 13 has ceramic particles and an organic thickener.
- organic thickening agent for example, a polyethylene oxide can be used.
- a dispersant may optionally also be used. Such a dispersant may comprise a sodium phosphate.
- the ceramic particles can be at least partially formed as CaC0 3 and / or at least partially from a zirconium oxide, in particular Zr0 2 , and / or at least partially from a titanium oxide, in particular Ti0 2 .
- a dispersing aid in particular sodium polyphosphate, is preferably used.
- the ceramic particles can also be formed from mica.
- no dispersing aid is used, since mica with the aid of a
- Thickening agent in particular polyethylene oxide, can be processed into a stable suspension.
- the ceramic particles in particular a mixture of Zr0 2 and Ti0 2 can be used. This results in a strong absorption of the laser beams.
- mixtures with such particularly good absorbing solids with a particularly inexpensive ceramic material, in particular CaC0 3 can be used.
- the thickening agent, in particular polyethylene oxide is preferably metered in between 3 and 8% by mass, in particular between 4 and 6% by mass, with respect to the amount of particles in order to produce the pasty protective agent. The range between 4 and 6% by mass has been found to be particularly advantageous in the experiment.
- a quotient with a dividend which is the mass of the organic thickening agent and a divisor which is the mass of the ceramic particles is preferably set between 0.03 and 0.08, in particular between 0.04 and 0.06.
- a divisor which is the mass of the ceramic particles is preferably set between 0.03 and 0.08, in particular between 0.04 and 0.06.
- polyethylene oxide is also particularly well suited to produce higher viscosity aqueous mixtures without inclusion of air bubbles.
- the pasty protective means 13 is at least largely promoted by the conveying device 6 without trapped air bubbles in the cavity 12.
- the paste-like protective agent in the cavity 12 of the workpiece 2 in the extension 10 of the directed to produce the through hole 3 on the wall 9 laser beam 7 between the wall 9 and the cavity 12 limiting rear wall 1 1 of the workpiece 2 is brought.
- the pasty protective means 13 is provided as protection when the laser device 5 is active.
- the introduced into the cavity 12 of the workpiece 2 pasty protective means 13 thus forms a back space protection device for laser drilling.
- Backspace protection device thus corresponds to the introduced into the cavity 12 mass of pasty protection means 13.
- the pasty protection means 13 and thus the
- Conveyor 6 completely off, but at least the part of the cavity 12, in which the extension 10 of the laser beam 7 hits the rear wall 1 1.
- the back space protection device is limited at least by the walls 9, 1 1.
- the pasty protective agent 13 may possibly escape from the cavity 12.
- the conveying device 6 conveys the paste-like protective agent 13, which comprises ceramic particles and the organic thickening agent.
- the paste-like protective agent 13 can be pressed, for example, with a kind of calender, possibly using a lance, into the cavity 12 of the workpiece 2.
- a loss of pasty protective agent 13, which occurs by exiting through already drilled through holes 4 or the like, can be compensated by, in particular continuous, repressing.
- the conveying device 6, which conveys the pasty protective agent 13, is partially inserted into the cavity 12.
- a working part of the cavity 12 is limited by the conveying device 6.
- the working part of the cavity 12 is filled by the conveying device 6 with the pasty protective agent 13.
- the pasty protective agent may also contain metallic particles, glass fiber pieces or the like to the
- the remaining pasty protective means 13 can be removed by washing or blowing.
- the invention is not limited to the described embodiments.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Laser Beam Processing (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013204809.2A DE102013204809A1 (de) | 2013-03-19 | 2013-03-19 | Pastöses Schutzmittel als Rückraumschutz bei einem Laserbohren, Rückraumschutzvorrichtung, Verfahren zum Erzeugen einer Durchgangsbohrung und Vorrichtung zur Durchführung solch eines Verfahrens |
PCT/EP2014/051916 WO2014146816A1 (de) | 2013-03-19 | 2014-01-31 | Pastöses schutzmittel als rückraumschutz bei einem laserbohren, rückraumschutzvorrichtung, verfahren zum erzeugen einer durchgangsbohrung und vorrichtung zur durchführung solch eines verfahrens |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2976178A1 true EP2976178A1 (de) | 2016-01-27 |
Family
ID=50033537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14702559.7A Ceased EP2976178A1 (de) | 2013-03-19 | 2014-01-31 | Pastöses schutzmittel als rückraumschutz bei einem laserbohren, rückraumschutzvorrichtung, verfahren zum erzeugen einer durchgangsbohrung und vorrichtung zur durchführung solch eines verfahrens |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2976178A1 (de) |
CN (1) | CN105142854A (de) |
DE (1) | DE102013204809A1 (de) |
WO (1) | WO2014146816A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104801857B (zh) * | 2015-05-13 | 2016-05-04 | 西安交通大学 | 使用冰—碳粉混合物的涡轮叶片激光加工的后壁防护方法 |
DE102018113508A1 (de) * | 2018-06-06 | 2019-12-12 | Liebherr-Components Deggendorf Gmbh | Verfahren zum Fertigen einer Düse |
CN110000005B (zh) * | 2019-02-13 | 2020-11-24 | 浙江润洁环境科技股份有限公司 | 一种电除尘器外壳的制备工艺及应用该外壳的电除尘器 |
CN110640339A (zh) * | 2019-10-16 | 2020-01-03 | 青岛理工大学 | 一种涡轮叶片异形气膜孔的激光加工工艺 |
CN113634873B (zh) * | 2021-08-31 | 2023-07-07 | 西安交通大学 | 基于干涉测量的激光加工后壁组合防护方法及系统 |
CN115042451B (zh) * | 2022-05-09 | 2024-05-07 | 中国科学院沈阳自动化研究所 | 基于带应力透明填充物的水导激光对壁防护装置及方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4156807A (en) * | 1978-03-24 | 1979-05-29 | United Technologies Corporation | Method for preventing burr formation during electron beam drilling |
US4239954A (en) * | 1978-12-11 | 1980-12-16 | United Technologies Corporation | Backer for electron beam hole drilling |
CH649486A5 (en) * | 1980-05-20 | 1985-05-31 | United Technologies Corp | Method of drilling a hole with an energy beam, and a substrate material for carrying out the method |
US4386257A (en) * | 1981-03-02 | 1983-05-31 | United Technologies Corporation | Alkali metal oxide free backers for energy beam drilling |
DE68907527T2 (de) * | 1988-06-13 | 1993-10-28 | Rolls Royce Plc | Laser-Bohren von Bauteilen. |
US4873414A (en) * | 1988-06-13 | 1989-10-10 | Rolls Royce Inc. | Laser drilling of components |
US6224361B1 (en) * | 1998-11-20 | 2001-05-01 | United Technologies Corportion | Tool for disposing laser blocking material in an airfoil |
DE102011078651A1 (de) | 2011-07-05 | 2013-01-10 | Robert Bosch Gmbh | Verfahren zum Erzeugen zumindest einer Durchgangsbohrung und Vorrichtung zur Durchführung solch eines Verfahrens |
-
2013
- 2013-03-19 DE DE102013204809.2A patent/DE102013204809A1/de not_active Withdrawn
-
2014
- 2014-01-31 WO PCT/EP2014/051916 patent/WO2014146816A1/de active Application Filing
- 2014-01-31 CN CN201480016278.6A patent/CN105142854A/zh active Pending
- 2014-01-31 EP EP14702559.7A patent/EP2976178A1/de not_active Ceased
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2014146816A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102013204809A1 (de) | 2014-09-25 |
WO2014146816A1 (de) | 2014-09-25 |
CN105142854A (zh) | 2015-12-09 |
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