WO2007115563A2 - Lance de pulvérisation - Google Patents

Lance de pulvérisation Download PDF

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Publication number
WO2007115563A2
WO2007115563A2 PCT/DE2007/000636 DE2007000636W WO2007115563A2 WO 2007115563 A2 WO2007115563 A2 WO 2007115563A2 DE 2007000636 W DE2007000636 W DE 2007000636W WO 2007115563 A2 WO2007115563 A2 WO 2007115563A2
Authority
WO
WIPO (PCT)
Prior art keywords
spray
spray head
spray lance
lance according
lance
Prior art date
Application number
PCT/DE2007/000636
Other languages
German (de)
English (en)
Other versions
WO2007115563A3 (fr
Inventor
Gilbert Gaiser
Original Assignee
Gühring Ohg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gühring Ohg filed Critical Gühring Ohg
Priority to EP07722194A priority Critical patent/EP2046510B1/fr
Publication of WO2007115563A2 publication Critical patent/WO2007115563A2/fr
Publication of WO2007115563A3 publication Critical patent/WO2007115563A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
    • B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
    • B05B1/046—Outlets formed, e.g. cut, in the circumference of tubular or spherical elements

Definitions

  • the invention relates to a spray lance for removing tinsel by means of high-pressure washing fluid according to the preamble of patent claim 1.
  • Such spray lances are used in the metal-working industry, in particular in chip-removing production, when it comes to flattening in hard-to-reach areas, for example at the periphery of deep recesses in workpieces to be machined, for example on crankshaft housings. to remove.
  • the spray lance is constructed like a workpiece washing device, but it works with very high detergent pressure, preferably with pressures above 900 bar up to 2000 bar.
  • the fanned-out washing jet emerging from the fine slot has in this case such a high energy that it is capable of reliably removing residual chips or flicker on the workpiece. Due to the fact that the fan-shaped, planar jet usually only a thickness of about 0.2 mm, the energy of the washing jet can be focused even better and thus the effect of the Flittergradentfernung be increased.
  • Conventional spray or high-pressure lances are constructed in such a way that high-pressure washing fluid is fed to a spray head, which is likewise provided with an inner recess, via a hollow shaft, which is equipped via a suitable interface to a supply system.
  • a spray head which is likewise provided with an inner recess, via a hollow shaft, which is equipped via a suitable interface to a supply system.
  • a plurality of axially staggered and circumferentially offset superfine slots are generally formed in the area of the lance tip.
  • the Spraying lance which - depending on the field of application - may have a considerable length of, for example, 1000 mm, is then moved step by step to the points to be machined of the workpiece, for example, to the individual functional surfaces of a crankshaft bore, in such a way that in the feed direction of the Spraying lance, the first step of the spraying steel entering the working area of the workpiece.
  • the high-pressure washing fluid supply is activated, and the spray lance is moved past the relevant position of the workpiece at a predetermined feed.
  • the high pressure supply is switched off again, and the spray lance is brought with its tip to the next point to be machined workpiece, such as the workpiece bore, whereupon the high pressure washing fluid supply is reactivated becomes.
  • the high-pressure washing fluid used is a special detergent which must be used in a special, separate circuit. That is, the high-pressure washing fluid is supplied from a container of a high-pressure pump, and collected after exiting the Feinstschlitzen again and returned via a filter to the sump.
  • the previous lance is made of stainless steel, whereby a lance tip is usually placed on a seamless precision steel tube, which may be provided with some ultrafine slots in the front region a conical outer surface and on the inside has a cylindrical recess closed by a spherical cap, which cuts the frontmost Feinst- slot.
  • the design of the inner surface of the spray tip is important to keep the fanned spray sufficiently stable.
  • the invention is therefore based on the object, a spray lance of the type described above in such a way that on the one hand it can still be operated at high system pressures, but at the same time has an improved life.
  • the invention is based on the finding that the filters used hitherto in the return of the special washing agent are not able to remove the finest particles. Filter, which can have a very high abrasive effect in the spray steel. Experiments have shown that in the processing of silicon-containing aluminum alloys, a significant percentage of silicon is contained in the special detergent, and that these silicon particles in a short time cause the Feinstschlitz or its surfaces are transformed so that the exiting fanned flat ray drastically loses energy.
  • the entire spray head, but at least the portion of the spray head forming the fine slot is formed by a hard material, such as, for example, solid carbide.
  • Such materials can form precisely, for example by laser processing or by EDM machining a very dimensionally fine Feinstschlitz in the order of 0.1 mm to 0.3 mm, preferably 0.2 mm, width are introduced, the width and / or surfaces and / or orifices even then remain dimensionally stable over a long period of time if extremely abrasive particles, such as, for example, silicon-containing particles are contained in the high-pressure washing fluid and system pressures of up to 2000 bar are used.
  • extremely abrasive particles such as, for example, silicon-containing particles are contained in the high-pressure washing fluid and system pressures of up to 2000 bar are used.
  • the microstructure of the hard material is optimized according to claim 2, that is, in terms of properties wear resistance on the one hand and bending resistance on the other.
  • Hard materials are used in the Area of machining is used more frequently, so that on the basis of existing extensive material science investigations, the microstructure can be determined in accordance with the requirements here present.
  • Hard materials in particular hard metallic materials such as metal carbides, in particular tungsten carbides or titanium carbides, but also nonmetallic hard materials, such as cermets, are produced by means of a sintering process.
  • the manufacturing advantage of hard materials has the consequence that the axial length the spray head, in which then preferably a plurality of axially staggered and circumferentially offset Feinstschlitze are formed, can be increased.
  • the spray head having the slots with a length of more than 50 mm.
  • the spray head can be coupled for example by a suitable soldering process, but also by a positive joint, such as by a thread or a dovetail connection, with an intermediate tube made of stainless steel, via which then the connection leads to the hollow shaft of the spray lance.
  • a positive joint such as by a thread or a dovetail connection
  • an intermediate tube made of stainless steel
  • the subsequent further part of the spray head can then be designed as a module with differently shaped Feinstschlitzen, so that can be put together according to the individual requirements adapted Spühlanzensystem.
  • Fig. 1 is a schematic side view of a Sprühstal. High pressure lance according to a first embodiment
  • Fig. 2 shows the detail II in Fig. 1; Fig. 2A the partial section IIA-IIA in Fig. 2;
  • FIG. 3 is a detail view corresponding to FIG. 2 of a further embodiment
  • Fig. 4 is a view corresponding to Fig. 3 a third embodiment of the spray lance.
  • Figs. 1 and 2 with 10 high-pressure or spray lance is used to remove tinsel by means of high-pressure washing fluid.
  • a washing fluid is usually degreasing and flame retardant. It is - as indicated in Fig. 1 with dash-dotted lines - performed in a circuit.
  • a high-pressure pump 12 sucks the special detergent from a container 14 and leads it to the spray lance 10 to a hollow shaft 16, which is fixed via an unspecified interface in a spray lance carrier.
  • the hollow shaft 16 carries axially and rotationally fixed a spray head 18 which is formed in two parts in the embodiment shown and consists of a spray tube 18A and a spray head 18B.
  • a plurality - in the illustrated embodiment 4 - Feinstschlitze 20-1 to 20-4 are formed, which, for example, a circular cylindrical inner recess 22A, 22B in the spray head 18 respectively.
  • the ultrafine slot 20-2 has a slot bottom 24 formed by a straight surface.
  • the slot bottom can also be rounded.
  • the high system pressure of up to 2,000 bar standing washing fluid in the form of a zoomed to a lance axis 26 and fanned surface beam from the slots 20-1 to 20-4, which is then used to remove tinsel.
  • the exiting high-pressure fluid is - as indicated by dotted lines in Fig. 1 further indicated - collected and passed through a filter device 28 to the container 14.
  • the finest slots 20-1 to 20-4 are inclined at different angles of attack WA-I and WA-2 to the axis 26.
  • the angle WA-I can be 30 °, for example, while the angle WA-2 is about 45 °.
  • the slots have a width B20 which is in the l / 10th of a millimeter range, for example, a width of 0.2 mm, this width dimension is occupied with a very narrow tolerance of, for example, 0.01 mm.
  • the peculiarity of the spray lance shown in FIGS. 1 and 2 is that the spray head 18 is made of a hard material, such as solid carbide, in the region in which the microfilters 20-1 to 20-4 are formed that the Feinstschlitze 20-1 to 20-4 are hineinerodiert.
  • the spray tube 18A is fixedly connected to the spray tip 18B by a solder joint 30, wherein a centering ring 32 is formed on the spray tip 18B.
  • the inner recess 22B of the spray head tip 18B is as well as the recess 22A circular cylindrical, but it is completed by a spherical cap or hemisphere 34 with a clean as possible, stepless as possible transition of the radius R in the cylindrical inner surface 22B 7 wherein the radius R subjected as little as possible fluctuations over the surface should be.
  • the engagement of the high pressure fluid in the Feinstschlitz 20-1 is kept as lossless as possible.
  • the spray head 18B made of a solid carbide, that is a sinterable hard material, the inner contour, that is, the recess 22B and the spherical cap 34 already in the sintered blank with great accuracy, but with low manufacturing technology
  • the solid carbide used for producing the spray head 18 (18A, 18B) is formed, for example, by a tungsten carbide whose mean grain size is less than 0.6 ⁇ m, preferably less than 0.55 ⁇ m, and whose CO content (expressed as a percentage by weight) is not below 9%, preferably not less than 10%.
  • the very small grain size in conjunction with the cobalt content results in increased toughness of the material, the fine graininess providing high wear resistance.
  • the toughness of the material controlled by the cobalt content is responsible for ensuring that the material has a sufficiently high bending fatigue strength to withstand the cyclic bending stresses induced in the material when building up the system pressure of up to 2000 bar.
  • the material has proven DK 460 UF according to carbide catalog, price list no. 40/2005 the company Ginninging OHG.
  • This material has a grain size of 0.5 microns, a hardness (HV30) of 1620, a density (g / cm 3 ) of 14.45, a tungsten carbide (WC) content of 90 mass% and a cobalt (Co) - Content of 10 mass%.
  • a positive connection can also be used in this area, if necessary. Additional, for example a threaded connection or a dovetail connection. Also, the centering ring may be formed on the spray tube 18A so that the spray tip 18B is formed with a corresponding groove.
  • Figs. 1 and 2 The embodiment shown in Figs. 1 and 2 is advantageous when it is relatively short spray lance.
  • spray lances of the type described above are used with lengths of 1000 mm and more.
  • the variants of FIGS. 3 and 4 are advantageous.
  • the components that correspond to the components of the embodiment described above provided with similar reference numerals, which are preceded by a "1" and "2".
  • the Feinstschlitze 120-1 to 120-4 all in one component, namely formed in the spray head 118.
  • the spray head 118 then has a compared to the spray tip 18B of the embodiment according to FIGS. 1 and 2 enlarged axial length of, for example, 50 mm and an outer diameter of about 6 mm.
  • a hard material preferably a sinterable hard material, such as solid carbide or a cermet spray head 118 is connected via a centering joint 140 to an intermediate tube 142 made of stainless steel, preferably stainless steel, in turn, a solder joint or a screw or another form-fitting connection can be used.
  • the intermediate tube 142 forms the bridge to the hollow shaft 16, which is not shown in detail in the embodiment according to FIG.
  • a spray lance can be modularly assembled with a length that is adapted to the respective field of use.
  • the inner contour in the form of the inner recess 122 and the subsequent Kugelkalotte 134 largely worked before the Fertigigsintern the spray head 118 dimensionally stable.
  • the ultrafine slits 120-1 to 120-4 are preferably introduced by the erosion process. Subsequently, the assembly to the intermediate pipe 142.
  • the tip of the spray head 118 has a conical shape, so that the microfine slot 120-1 emerges in the area of the cone jacket surface 144 near a rounded tip 146.
  • the spray lance 110 of the embodiment according to FIG. 3 can thus be constructed modularly, wherein different spray heads 118 can be assembled with different intermediate tubes 142.
  • FIG. 4 Another variant of a modular expansion of the spray lance is shown in FIG. 4.
  • This spray lance 210 differs from that of FIG. 3 in that the spray head is divided once again into a spray head tip 218B and a spray head adapter 218A.
  • the spray head tip 218B the ultrafine slot 220-1 is formed while the remaining minute slots are formed in the spray head spacer 218A. That the total length of
  • Spray lance 210 determining intermediate tube is designated 242.
  • solder joint As a connection between the components 218A and 218B of the spray head, a solder joint is used in the variant according to FIG. 4. This connection is only an example. It can also be a positive connection, such as a threaded connection or a dovetail connection can be used.
  • any sufficiently wear-resistant and resistant to bending metallic or non-metallic hard material can be used as the material of the fine slot forming hard material, as long as the structure is optimized in terms of the properties wear resistance and fatigue strength.
  • the hard material should be sinterable, so that the manufacturing advantages described above can be maintained.
  • Metal carbides (WC, TiC etc.) or metal nitrides (TiN, TiC / TiN, metal borides) can be used as metallic hard materials.
  • non-metallic hard materials such as cubic boron nitride (BN), boron carbide (B 4 C, SiC and Al 2 O 3)
  • hard material systems such as mixed carbides, carbonitrides, mixed ceramics and nitride ceramics can also be used.
  • the ultrafine slots can also have different inclinations. As the number of microfilts is reduced, the spray lance may be rotationally driven to thereby more effectively capture the entire periphery of the workpiece surface being machined with the spray jet.
  • the contour of the slot bottom may be rounded other than a planar configuration.
  • the ultrafine slots are formed from hard material, preferably solid carbide.
  • hard or solid carbide (VHM) inserts which are then inserted into a carrier material made of stainless steel, for example soldered or pressed in.
  • intermediate tube 142, 242 carrying the spray head can also be made of another material, such as a solid carbide.
  • the ultrafine slots 20-2, 20-3 and 20-4 are arranged, for example, at a uniform circumferential distance from one another. However, it is also possible to work with other angular distributions.
  • the invention thus provides a spray lance for removing tinsel by means of high pressure washing fluid. It has a shaft which can be coupled to a tool holder and which carries a spray head which is likewise equipped with an internal recess.
  • a spray head which is oriented so that the high-pressure washing fluid which can be supplied via the hollow shaft can leave the spray head in the form of a fanned, flat jet.
  • at least the area of the spray head forming the microfine slot, but preferably at least the portion of the spray head forming the slots consists of a hard material, preferably of solid carbide.
  • the microstructure of the hard material, in particular of the hard metal is preferably selected with regard to an optical system. Optimization of the properties of wear resistance and fatigue strength.

Landscapes

  • Coating By Spraying Or Casting (AREA)
  • Nozzles (AREA)

Abstract

Lance de pulvérisation pour l'élimination des copeaux restants à l'aide de fluide de lavage sous haute pression, qui possède une tige creuse pouvant être couplée à un logement d'outil, ladite tige creuse portant une tête de pulvérisation également pourvue d'un évidement interne. La tête de pulvérisation présente au moins une fente mince débouchant dans l'évidement interne et orientée de manière telle que le fluide de lavage sous pression amené par la tige creuse peut quitter la tête de pulvérisation sous forme de jet plat étalé. L'objet de la présente invention consiste à améliorer la durée d'utilisation de ladite lance. A cet effet, la zone de la tête de pulvérisation constituant la fente mince, et de préférence au moins le segment de la tête de pulvérisation formant les fentes, est constitué d'une matière dure, de préférence de métal dur plein. L'ajout de la matière dure, en particulier du métal dur plein, permet d'optimiser de préférence les propriétés de résistance à l'usure et de résistance aux flexions répétées.
PCT/DE2007/000636 2006-04-11 2007-04-11 Lance de pulvérisation WO2007115563A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07722194A EP2046510B1 (fr) 2006-04-11 2007-04-11 Lance de pulvérisation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610017339 DE102006017339A1 (de) 2006-04-11 2006-04-11 Sprühlanze
DE102006017339.2 2006-04-11

Publications (2)

Publication Number Publication Date
WO2007115563A2 true WO2007115563A2 (fr) 2007-10-18
WO2007115563A3 WO2007115563A3 (fr) 2008-03-27

Family

ID=38514567

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/000636 WO2007115563A2 (fr) 2006-04-11 2007-04-11 Lance de pulvérisation

Country Status (3)

Country Link
EP (1) EP2046510B1 (fr)
DE (1) DE102006017339A1 (fr)
WO (1) WO2007115563A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015204664A1 (de) * 2015-03-16 2016-09-22 Lechler Gmbh Flachstrahldüse und Verwendung einer Flachstrahldüse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900851A (en) * 1957-08-19 1959-08-25 John J Rutledge Sandblasting nozzle and method of producing it
DE2135298A1 (de) * 1971-07-15 1973-03-15 Daimler Benz Ag Druckluftduese fuer reinigungszwecke
FR2643291B1 (fr) * 1989-02-23 1991-05-31 Lediabat Frederic Perfectionnement aux dispositifs pour la projection de jets de liquide a des fins de nettoyage et/ou de decoupe
DE29900948U1 (de) * 1998-12-23 1999-05-12 Schrader, Holger, 88400 Biberach Waschdüsen-Vorrichtung
DE10052021B4 (de) * 2000-10-18 2010-09-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Wasserstrahlschneidhochdruckdüse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Also Published As

Publication number Publication date
EP2046510B1 (fr) 2012-12-05
DE102006017339A1 (de) 2007-10-18
WO2007115563A3 (fr) 2008-03-27
EP2046510A2 (fr) 2009-04-15

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