EP3426910B1 - Élément subissant une pression interne (rail) et procédé de fabrication associé - Google Patents

Élément subissant une pression interne (rail) et procédé de fabrication associé Download PDF

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Publication number
EP3426910B1
EP3426910B1 EP17710512.9A EP17710512A EP3426910B1 EP 3426910 B1 EP3426910 B1 EP 3426910B1 EP 17710512 A EP17710512 A EP 17710512A EP 3426910 B1 EP3426910 B1 EP 3426910B1
Authority
EP
European Patent Office
Prior art keywords
fastening
flange
opening
bore
bolt
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.)
Active
Application number
EP17710512.9A
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German (de)
English (en)
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EP3426910A1 (fr
Inventor
Florian Renner
Thomas Sellmann
Florian Geiger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hirschvogel Umformtechnik GmbH
Original Assignee
Hirschvogel Umformtechnik GmbH
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.)
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Publication of EP3426910A1 publication Critical patent/EP3426910A1/fr
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Publication of EP3426910B1 publication Critical patent/EP3426910B1/fr
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Classifications

    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • 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
    • 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
    • F02M2200/8084—Fuel injection apparatus manufacture, repair or assembly involving welding or soldering
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/855—Mounting of fuel injection apparatus using clamp elements or fastening means, e.g. bolts or screws
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/857—Mounting of fuel injection apparatus characterised by mounting fuel or common rail to engine

Definitions

  • the present invention relates to an internal pressure-loaded component, in particular in the form of a high-pressure fuel reservoir (rail), for example for a common rail fuel injection system of an internal combustion engine, and a method for producing such a component.
  • a high-pressure fuel reservoir for example for a common rail fuel injection system of an internal combustion engine
  • Corresponding internal pressure-loaded components in particular high-pressure fuel accumulators, are known from the prior art. These usually have a base body with a longitudinal cavity or an elongated blind hole. The base body preferably also has at least one connection flange, likewise with an elongated bore, which connects the longitudinal cavity to the outside.
  • a rail is part of a fuel injection system and is used to distribute the fuel delivered by the fuel pump to the individual cylinders of an internal combustion engine. Rails are usually made of steel and especially stainless steel.
  • Such internally pressure-loaded components generally have fastening elements formed integrally with the component base body in order to appropriately fasten the internally pressure-loaded component, for example, to an engine block.
  • These fastening elements which are formed integrally with the base body, have a through opening into which a fastening screw is inserted in order to screw the component to the engine block.
  • the disadvantage of this configuration is the high weight, in particular of the fastening elements, caused by forging production, since these, due to their integral design with the base body, require correspondingly strong wall thicknesses and transition areas. This in turn results in a high use of material and consequently in comparatively high costs.
  • the DE 20 2014 104 466 U1 shows a fuel distributor with a sleeve pressed into a stepped bore of a flange section.
  • the longitudinal bore is made in several steps, which are carried out immediately one after the other or separately by other method steps.
  • the longitudinal bore can be introduced into the bolt and, after the materially bonded connection, it can be reworked in a finishing or fine machining step.
  • the fastening sleeve can be optimally designed in terms of geometry and material.
  • it can also be made of a different material than the base body in order to be optimally designed to meet the requirements.
  • the bolt or the fastening sleeve can be inserted essentially loosely - for example, preferably with a clearance fit - into the through-hole.
  • a transition fit is also conceivable.
  • the insertion should be as simple as possible and at the same time safe - also with a view to automated production.
  • the through hole can preferably be introduced in such a way that it widens at least partially (for example conically) from the one opening to the other opening in order to form an insertion bevel for the fastening sleeve or the bolt.
  • the end of the fastening sleeve or of the bolt to be introduced or introduced can have a shape (for example likewise conical) that corresponds to the through-hole and in particular the widening area.
  • the aforesaid can simplify the introduction, in particular in the case of automated production.
  • the inserted bolt or the inserted fastening sleeve can also rest circumferentially against the inner wall of the through-hole, at least in the area of the one opening. It can thus be ensured that the bolt or the fastening sleeve is held sufficiently securely in the longitudinal bore after the insertion and before the cohesive connection until a sufficiently secure and strong enough cohesive connection is provided for the operation of the component. This makes it easier to handle the component during manufacture.
  • the material connection can be provided at least in the area of the one opening and preferably the one opening so that it is closed all the way round.
  • There the step of material connection can be carried out by means of welding and, in particular, laser welding.
  • the fact that the bolt is preferably only welded from above by means of a laser enables the fastening sleeve or bolt to be connected quickly and easily to the base body or fastening flange, while at the same time providing a secure connection.
  • regions of a weld seam that protrudes from the fastening flange can be removed and, in particular, milled away or ground away.
  • Such processing - for example milling over - of a weld seam serves in particular to avoid corrosion and also ensures a flat surface which, for example, serves to support a screw head of a fastening screw for mounting the component subjected to internal pressure.
  • connection flange with a through opening that is open to the outside and opens into the longitudinal cavity can be provided on the base body.
  • the base body can preferably be designed integrally together with the fastening flange and / or the connection flange and can preferably be produced by means of forging.
  • preferred base bodies with a fastening flange and optionally also a connection flange are formed integrally with one another.
  • the fastening flange and / or connection flange are connected to the base body in a materially bonded manner, this configuration being less preferred than the integral configuration, for example by means of forging.
  • a material connection - i.e. the connection of several parts by means of material connection manufacturing processes, such as welding, soldering and the like - is to be distinguished from an integral design / formation in which different sub-areas of a component are made in a single manufacturing process - such as forging or casting - be made in one piece.
  • the through bore and / or the longitudinal bore and / or the longitudinal cavity and / or the through opening are preferably made by means of machining production methods, such as in particular drilling, milling, reaming and / or honing, brought in.
  • the manufacturing process can be further optimized by using, in particular, the same machining manufacturing processes.
  • the fastening sleeve is preferably milled flat at its end opposite the fastening flange. In this way, the fastening sleeve can be cut to a desired length.
  • the side facing the assembly area of the internal pressure-loaded component - for example the side with which the fastening sleeves are placed on the engine block - can be adapted to the geometric shape or orientation of the assembly area.
  • the bolt is correspondingly cut to length and preferably milled flat before the longitudinal bore is made.
  • the aforementioned method can in principle be carried out at least partially in an automated or partially automated manner, which further increases the effectiveness of the method.
  • the present invention also relates to an internal pressure-loaded component itself, which is produced according to a method of the present invention.
  • the present invention relates to a component subjected to internal pressure, in particular in the form of a high-pressure fuel accumulator (rail), having a base body with a longitudinal cavity, a fastening flange for fastening the component subject to internal pressure, the fastening flange having a through-hole extending longitudinally through the fastening flange with two has openings opposite the longitudinal axis, and a fastening sleeve inserted into the through-hole (i.e.
  • the fastening sleeve being arranged on the side of one of the openings flush with the fastening flange and extending from this opening through the through-bore and the other opening extends therethrough to protrude from the mounting flange.
  • the fastening sleeve is firmly connected to the fastening flange.
  • the present invention is characterized by the integral connection of two components - base body with fastening flange on the one hand and fastening sleeve / bolt on the other hand - in particular by a lower weight, which is particularly important in the automotive sector .
  • a sufficiently strong and durable connection can be provided which also withstands the forces occurring during operation.
  • the fastening flange can preferably have a support surface on the side of the one opening for just such a flange area, in particular a screw head, of a fastening element extending through the fastening sleeve, in particular a fastening screw, for mounting the component subjected to internal pressure. Since the fastening sleeve is only inserted into the through-hole, easy introduction, for example for an automated feeding of fastening sleeve / bolts, can also be made possible; especially when compared to clamping by providing an oversize.
  • the internal pressure-loaded component is made of steel and in particular of stainless steel, which, for example in the form of a rail, withstands the pressures necessary for the fuel supply.
  • the fastening sleeve or the bolt can also be made of a different material which, in particular, takes into account the requirements for the fastening function.
  • the fastening sleeve can be connected to the fastening flange with a material fit all around at least in the region of the one opening and preferably the one opening.
  • a secure connection between the fastening sleeve and the fastening flange is thus provided. Since the corresponding material connection only has to be provided from one side, the internal pressure-loaded component is also easy to manufacture.
  • the material connection can be formed by welding and in particular by laser welding.
  • a correspondingly produced material connection is particularly advantageous for the preferred materials - such as stainless steel - for producing a secure connection.
  • the material connection and in particular a weld seam formed by the welding can preferably be designed to overlap the fastening flange and the fastening sleeve. In this way, a secure material connection is made possible.
  • the material connection and in particular a weld seam formed by the welding can for example have a depth of 2 to 10 mm, preferably 3 to 7 mm and particularly preferably 3.5 to 6 mm. Since, in particular, in the area of the weld seam, deep welds are permitted on the surface, a particularly secure material connection can be provided. Of course, the depth of the weld seam is fundamentally dependent on the materials and dimensions of the components to be connected, so that the invention is not limited to this.
  • the fastening sleeve is essentially loosely inserted into the through-hole - for example with a clearance fit - or with a transition fit. Regardless of the additional cohesive connection provided, the fastening sleeve - or, as described in the above method, a corresponding bolt with or without a longitudinal bore - can simply be inserted into the through bore in order to finally be welded to the fastening flange accordingly.
  • the through-hole (designed in this way) enables the fastening sleeve or a corresponding bolt to be simply put together before a material connection of these components and also to be held sufficiently securely until a material connection is made later, without the fastening sleeve falling out of the through-hole.
  • the through hole widens at least partially from one opening to the other opening.
  • the through hole can have an at least partially conical shape.
  • the through hole can be a kind of lead-in bevel for form the fastening sleeve or the bolt.
  • the assembly of the fastening sleeve / bolt on the one hand with the fastening flange on the other hand can also be facilitated.
  • the through-hole tapers towards the one opening, it can also be made possible to bring the connection partners together as close as possible in the area of the weld joint, particularly in the preferred area for the integral connection, in order to enable a secure welded connection when the two components are integral.
  • the fastening sleeve can rest circumferentially on the inner wall of the through-hole at least in the area of the one opening. This also enables the fastening sleeve to be centered with respect to the through hole and thus a defined positioning and alignment of the fastening sleeve or the bolt.
  • the inserted end of the fastening sleeve or of the bolt can have - at least in the widening (conical) area of the through hole - a shape corresponding (for example, conical) to the through hole.
  • the fastening sleeve in particular its end inserted into the through-hole, on the one hand and the through-hole on the other hand, preferably have the same cross-sectional contour and in particular a corresponding shape, so that the fastening sleeve can be securely received in the through-hole and, furthermore, a secure material connection between these two connection partners is made possible.
  • connection flange with a through opening that is open to the outside and opens into the longitudinal cavity.
  • This connection flange or the through-opening connected to the longitudinal cavity ultimately serves to distribute, for example, fuel delivered into the longitudinal cavity to the respective cylinders of an internal combustion engine.
  • the base body and the fastening flange and, if present, the connection flange are preferably formed integrally with one another.
  • these components can be provided forged as an integrally formed component.
  • the internal pressure-loaded component can also have a plurality of fastening sleeves - for example four - which are each inserted into a fastening flange and connected to it in a materially bonded manner.
  • Each fastening sleeve can be assigned its own fastening flange.
  • at least some of the fastening flanges are formed integrally with one another, so that one fastening flange can also accommodate a plurality of fastening sleeves accordingly.
  • connection flanges and some of the fastening flanges are formed integrally with one another.
  • the base body - in particular in the embodiment of the component as a rail - can have a sensor connection flange which is preferably formed integrally with the base body and which serves to provide a pressure sensor (for example a rail pressure sensor).
  • the Figures 1 to 7 show different steps for the production of an internal pressure-loaded component 1 according to the invention Figure 7 Finally, the finished component 1 subjected to internal pressure is shown.
  • the component 1 can be designed in the form of a high-pressure fuel accumulator (rail), for example for a common rail fuel injection system of an internal combustion engine (eg an Otto or diesel engine), in particular for direct gasoline injection.
  • the internal pressure-loaded component 1 is designed in such a way that a fluid, such as for example a fuel, can flow through it under pressure.
  • the component 1 can be made of metal; for example made of aluminum or steel (in particular stainless steel, such as stainless steel) or titanium. However, other materials are also conceivable as long as they can withstand the pressure exerted on the component 1.
  • the component 1 has a base body 2 with a longitudinal cavity 3.
  • the longitudinal cavity 3 is preferably open on one side as seen in the longitudinal direction. Via the one-sided opening 30 formed in this way, fuel can be conveyed into the longitudinal cavity 3 of the base body 2, for example by means of a fuel pump.
  • the longitudinal direction is understood to mean the longitudinal extent L2 of the essentially elongate component 1 or base body 2.
  • connection flange 4 In the embodiment shown here, in particular for a rail, the base body 2 has at least one connection flange 4. A total of four connection flanges 4 are shown in the figures. However, the number is not limited by the invention.
  • the connection flange 4 can be provided, for example, for the connection of a fluid guide element, such as a fuel line.
  • the component 1 When used as a rail, the component 1 preferably has at least one connection flange 4 per cylinder of the associated internal combustion engine.
  • a sensor connection flange S such as that shown, for example, in FIG Figure 3 is shown. This can serve to provide a pressure sensor (for example rail pressure sensor).
  • connection flange 4 can have a through opening 5 which is open to the outside and opens into the longitudinal cavity 3.
  • fuel conveyed into the longitudinal cavity 3 via the opening 30 can be further distributed to the (at least one; here four) connection piece 4 via the through openings 5 opening into the longitudinal cavity 3.
  • Fuel guide element such as a fuel line, can be connected in order to distribute and convey the fluid conveyed by the rail accordingly to the cylinders of an internal combustion engine.
  • the component 1 also has a fastening flange 6 for fastening the component 1.
  • the component 1 or the base body 2 has a total of four fastening flanges 6.
  • the number of the mounting flanges 6 is not limited.
  • the fastening flanges 6 are preferably arranged distributed on two opposite sides of the base body 1 with respect to its longitudinal axis L2 and in the longitudinal direction thereof, the distribution and arrangement not being restricted by the invention. Rather, it is preferred to provide an arrangement of the fastening flanges 6 that is as weight-optimized and fastening-optimized as possible.
  • fastening flanges 6 can be formed integrally with some of the connection flanges 4. In the embodiment shown, this applies to the longitudinal direction of the As seen from the base body 2, connecting flanges 4 or fastening flanges 6 each on the outside (here left and right).
  • the base body 2 and the fastening flange 6 and, if present, also the connection flange 4 are formed integrally with one another.
  • the integral component consisting of base body 2, fastening flange 6 and optionally connecting flange 4 is produced forged, although other types of production (e.g. casting) are also conceivable.
  • the fastening flange 6 has a through-hole 7 extending longitudinally through the fastening flange 6. This is especially true in Figure 2 to recognize.
  • the through hole 7 has two openings 70, 71 which are opposite with respect to the longitudinal axis L7 of the through hole 7.
  • the component 1 also has a bolt 80 (with a longitudinal bore 81) or fastening sleeve 8 inserted into the through-bore 7.
  • the fastening sleeve 8 is on the side of one of the openings 70, 71 - in Figure 2 the upper opening 70 - arranged flush with the mounting flange 6 and extends from this one opening 70 through the through-hole 7 and the other opening 71 to protrude from the mounting flange 6, as shown in particular in FIG Figure 6 and 7th is shown.
  • the component 1 can be mounted in a defined position on an associated component - such as an engine block.
  • the fastening sleeve 8 - here still shown as a bolt 80 without a longitudinal bore 81 - can be connected to the fastening flange 6 in a materially bonded manner.
  • the additional material connection 9 provides a sufficiently secure and strong connection between the two components Base body 2 or fastening flange 6 on the one hand and fastening sleeve 8 on the other hand provided.
  • the fastening sleeve 8 can be connected to the fastening flange 6 in a closed and cohesive manner at least in the region of the one opening 70 - here the upper opening - and preferably the one opening 70.
  • a particularly secure connection of the two components 2, 6, 8 can be made possible, in accordance with the requirements.
  • the material connection 9 is formed in particular by welding and preferably laser welding.
  • the material connection 9, in particular a weld seam 9 formed by welding, is preferably designed to overlap the fastening flange 6 and the fastening sleeve 8, as shown in FIG Figure 4 can be seen.
  • the integral connection 9 and in particular a weld seam 9 formed by the welding can have a depth X of 2 to 10 mm, preferably 3 to 7 mm and particularly preferably 3.5 to 6 mm, these dimensions not being restricted by the invention and in particular by the Geometry and dimension and also the materials used depends on the components used.
  • the through-hole 7 can widen from the one opening 70 to the other opening 71 in order to thus form an insertion bevel for the fastening sleeve 8 or the bolt 80.
  • the through hole 7 preferably has a conical shape as a whole or at least partially - preferably on the side of the one opening 70.
  • the fastening sleeve 8 or a corresponding bolt 80 is preferably inserted from the side of the other opening 71 in the direction of the one opening 70 into the through-hole 7 until the correspondingly inserted end 82 of fastening sleeve 8 or bolt 80 is correspondingly flush (here flush) is arranged with the fastening flange 9 in order to then be connected to one another in a materially bonded manner.
  • This geometric configuration of the through hole 7 thus also enables a simplified automatic feeding of a corresponding fastening sleeve 8 or bolt 80 into the through-hole 7.
  • the inserted end 82 can have a shape that corresponds to the through-hole 7 - at least in the widening area thereof; thus, for example, also be conical.
  • the fastening sleeve 8 rests against the inner wall 72 of the through hole 7 at least in the area of the one opening 70 - that is to say the opening 70 at which the materially bonded connection 9 is preferably provided. This ensures that, in particular in the area of the weld joint - i.e. in the area of one opening 70 - the fastening sleeve 8 (or bolt 80) on the one hand and the fastening flange 6 on the other hand come together sufficiently close - for example in the form of a clearance or transition fit are in order to form a sufficiently secure material connection 9.
  • the fastening sleeve 8 or bolts 80 - in particular the end 82 thereof inserted into the through hole 7 - and the through hole 7 have the same cross-sectional contour and in particular a corresponding shape.
  • the cross-sectional contour is preferably round and the shape is preferably cylindrical or conical, the invention not being restricted to such embodiments.
  • the fastening flange 6 has on the side of the one opening 70 a support surface 60 for a flange area, in particular a screw head, of a fastening element extending through the fastening sleeve 8, in particular a fastening screw for mounting the internally pressurized component 1 and thus defined fastening of the component 1 to a corresponding assembly area can be provided.
  • a base body 2 with a longitudinal cavity 3 and with a fastening flange 6 for fastening the internal pressure loaded
  • Component 1 provided.
  • a base body 2 is for example in Figure 1 shown.
  • a bolt 80 as it is for example in the Figures 3 and 4th is shown provided.
  • the bolt 80 can be provided with a longitudinal bore 81 in this or a later method step in order to form a fastening sleeve 8.
  • connection flange 4 can be provided on the base body 2.
  • This connection flange 4 preferably has a through opening 5 which is open to the outside and opens into the longitudinal cavity 3.
  • a through-hole 7 extending longitudinally through the fastening flange 6 is made in the fastening flange 6 in such a way that it has two openings 70, 71 opposite one another with respect to the longitudinal axis L7 of the fastening flange 6.
  • Both the through hole 7 and the longitudinal bore 81 as well as the longitudinal cavity 3 and the through opening 5 can be introduced by means of machining production methods, such as in particular drilling, milling, reaming and / or honing.
  • the base body 2 preferably together with the fastening flange 6 and / or the connection flange 4, can be designed integrally and manufactured, for example, by means of forging.
  • the bolt 80 is inserted into the through-hole 7 in such a way that the bolt 80 on the side of one of the openings - here the upper opening 70 - is arranged flush with the fastening flange 6, and extends from this opening 70 through the through-hole 7 and the other opening 71 extends therethrough to protrude from the mounting flange 6.
  • a widening e.g.
  • the bolt 80 is inserted into the through hole 7 in such a way that it is inserted into the through hole 7 essentially loosely (preferably with a clearance fit) or with a transition fit.
  • the bolt 80 can rest against the inner wall 72 of the through hole 7 at least in the area of the one opening 70, preferably circumferentially. In this way, it can be ensured that a bolt 80, once inserted, does not fall out without further ado - that is, for example due to gravity - until a subsequent connection step with the fastening flange 6.
  • due to the rather "loose" connection between the bolt 80 on the one hand and the fastening flange 6 on the other hand particularly simple insertion of the bolt 80 can be made possible.
  • the bolt is materially connected to the fastening flange 6.
  • the material connection 9 is preferably provided at least in the area of the one opening 70 and preferably the opening 70 in a closed circumferential manner.
  • the step of material connection is preferably carried out by means of welding and in particular by means of laser welding. Carrying out such a welding process preferably on one side (here from above) enables such a connection to be provided in a particularly simple and, at the same time, secure manner. This can be, for example, the Figure 4 can be removed.
  • areas of a weld seam 9 that protrude from the fastening flange 6 can be removed in a subsequent step.
  • these areas can be removed, for example by means of milling or grinding, in order, for example, also to form a flat support surface 60 - as described above -.
  • this step is in Figure 5 shown.
  • the further step of making a longitudinal bore 81 in the bolt 8 to form a fastening sleeve 8 can preferably also follow the step can be carried out for the integral connection 9. It is also conceivable that the introduction of the longitudinal bore 81 - like any other step for providing a bore 3, 81, 7, 5 - is carried out in several steps immediately one after the other or also separately by other method steps. For example, a corresponding bore 7, 81, 3, 5 can first be made and this can be finished in subsequent fine machining steps.
  • the solid material bolt 80 is / is immediately provided with a longitudinal bore 81 when it is provided in order to be provided as a corresponding fastening sleeve 8.
  • the bolt 80 or the fastening sleeve 8 can be cut to length at its end 83 opposite the fastening flange 6 and preferably milled flat in order to finally reduce the fastening sleeve 8 or bolt 80 to a desired length and with a corresponding orientation or To provide a contour which corresponds to that of the corresponding assembly area in order to enable secure assembly via the fastening sleeves 8, for example on an engine block.
  • the method as described above can be carried out at least partially automated or partially automated.
  • the present invention also comprises a component 1 which is subject to internal pressure and which was produced by a method according to the present invention.
  • the present invention is not restricted to the exemplary embodiment described above, provided that it is covered by the subject matter of the following claims.
  • the present invention is not limited to corresponding materials, dimensions or geometrical configurations of the individual components.
  • the number of fastening flanges, for example, is also 6, Connection flanges 4 and fastening sleeves 8 are not restricted by the invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (15)

  1. Procédé de fabrication d'un élément sous pression interne (1), plus particulièrement, lors de la réalisation d'un accumulateur de carburant haute pression (rail), présentant les étapes suivantes :
    • mise à disposition d'un corps de base (2) avec une cavité longitudinale (3) et avec une bride de fixation (6) pour la fixation de l'élément sous pression interne (1),
    • mise à disposition d'un boulon (80),
    • mise en place d'un alésage traversant (7) s'étendant longitudinalement à travers la bride de fixation (6) avec deux ouvertures (70, 71) opposées par rapport à l'axe longitudinal (L7),
    • insertion du boulon (80) dans l'alésage traversant (7) de manière telle que le boulon (80) est disposé du côté de l'une des ouvertures (70) en affleurement avec la bride de fixation (6) et s'étend de cette ouverture (70) à travers l'alésage traversant (7) et l'autre ouverture (71), afin de faire saillie de la bride de fixation (6),
    • assemblage par liaison de matière du boulon (80) et de la bride de fixation (6), et
    • mise en place d'un alésage traversant (81) dans le boulon (80) pour former une douille de fixation (8).
  2. Procédé selon la revendication 1, dans lequel le boulon (80) ou la douille de fixation (8) est inséré(e) dans l'alésage traversant (7) essentiellement de façon lâche, de préférence avec un ajustement avec jeu, ou avec un ajustement de transition, et/ou
    dans lequel le boulon inséré (80) ou la douille de fixation insérée (8) est adjacente sur son pourtour à la paroi interne (72) de l'alésage traversant (7), au moins dans la zone de ladite une ouverture (70).
  3. Procédé selon l'une des revendications précédentes, dans lequel l'assemblage par liaison de matière (9) est prévu au moins dans la zone de ladite une ouverture (70) et, de préférence, l'ouverture (70) est prévue fermée sur son pourtour, et/ou dans lequel l'étape de l'assemblage par liaison de matière est réalisée par soudure, plus particulièrement soudure au laser, et/ou
    dans lequel, après l'assemblage par liaison de matière, des zones faisant saillie de la bride de fixation (6) d'un cordon de soudure (9) ainsi créé, sont supprimées, plus particulièrement éliminées par fraisage ou par meulage.
  4. Procédé selon l'une des revendications précédentes, dans lequel est prévu sur le corps de base (2) au moins une bride de raccordement (4) avec une ouverture de passage (5) ouverte vers l'extérieur et débouchant dans la cavité longitudinale (3).
  5. Procédé selon l'une des revendications précédentes, dans lequel le corps de base (2) est conçu d'une seule pièce, de préférence conjointement avec la bride de fixation (6) et/ou la bride de raccordement (4) et est fabriqué, de préférence, par forgeage.
  6. Procédé selon l'une des revendications précédentes, dans lequel l'alésage traversant (7) et/ou l'alésage longitudinal (81) et/ou la cavité longitudinale (3) et/ou l'ouverture de passage (5) sont mis en place au moyen d'un procédé de fabrication par enlèvement de copeaux, plus particulièrement, alésage, fraisage, frottement et/ou rodage, et/ou dans lequel le boulon (80) ou la douille de fixation (8) est tronçonné (e) à son extrémité (83) opposée à la bride de fixation (6) et est fraisé(e), de préférence, de façon plane.
  7. Procédé selon l'une des revendications précédentes, dans lequel le procédé est réalisé au moins en partie d'une manière automatisée ou partiellement automatisée.
  8. Élément sous pression interne (1), plus particulièrement dans la réalisation d'un accumulateur de carburant haute pression (rail), fabriqué selon un procédé suivant l'une des revendications précédentes.
  9. Élément sous pression interne (1), plus particulièrement dans la réalisation d'un accumulateur de carburant haute pression (rail), présentant un corps de base (2) avec une cavité longitudinale (3), une bride de fixation (6) pour la fixation de l'élément sous pression interne (1), dans lequel la bride de fixation (6) présente un alésage traversant (7) s'étendant longitudinalement à travers la bride de fixation (6) avec deux ouvertures (70, 71) opposées par rapport à l'axe longitudinal (L7), et
    une douille de fixation (8) insérée dans l'alésage traversant (7), dans lequel la douille de fixation (8) est disposée du côté de l'une des ouvertures (70) en affleurement avec la bride de fixation (6) et s'étend de cette ouverture (70) à travers l'alésage traversant (7) et l'autre ouverture (71), afin de faire saillie de la bride de fixation (6),
    dans lequel la douille de fixation (8) est raccordée par liaison de matière à la bride de fixation (6).
  10. Élément sous pression interne (1) selon la revendication 8 ou 9, dans lequel la douille de fixation (8) est raccordée par liaison de matière à la bride de fixation (6) au moins dans la zone de ladite une ouverture (70) et, de préférence, ladite une ouverture (70) est fermée sur son pourtour par liaison de matière, et/ou dans lequel le raccordement par liaison de matière (9) est formé par soudure, plus particulièrement soudure au laser, et/ou
    dans lequel le raccordement par liaison de matière (9), plus particulièrement un cordon de soudure (9) formé par la soudure, est conçu en débordant sur la bride de fixation (6) et la douille de fixation (8), et/ou
    dans lequel le raccordement par liaison de matière (9), plus particulièrement un cordon de soudure (9) formé par la soudure, présente une profondeur de 2 à 10 mm, de préférence 3 à 7 mm, et plus préférablement de 3,5 à 6 mm.
  11. Élément sous pression interne (1) selon l'une des revendications 8 à 10, dans lequel la douille de fixation (8) est insérée essentiellement lâche, de préférence avec un ajustement avec jeu, ou avec un ajustement incertain dans l'alésage traversant (7), et/ou
    dans lequel l'alésage traversant (7) s'élargit de ladite une ouverture (70) vers l'autre ouverture (71), de préférence coniquement, pour former un chanfrein d'introduction pour la douille de fixation (8).
  12. Élément sous pression interne (1) selon l'une des revendications 8 à 11, dans lequel la douille de fixation (8) est adjacente sur son pourtour à la paroi interne (72) de l'alésage traversant (7), au moins dans la zone de ladite une ouverture (70), et/ou
    dans lequel la douille de fixation (8), plus particulièrement son extrémité (82) introduite dans l'alésage traversant (7), et l'alésage traversant (7) présentent le même contour en section transversale et, plus particulièrement, une forme correspondante.
  13. Élément sous pression interne (1) selon l'une des revendications 8 à 12, présentant, en outre, au moins une bride de raccordement (4) avec une ouverture de passage (5) ouverte vers l'extérieur et débouchant dans la cavité longitudinale (3).
  14. Élément sous pression interne (1) selon l'une des revendications 8 à 13, dans lequel le corps de base (2) et la bride de fixation (6) et, si présente, la bride de raccordement (4) sont conçus ensemble d'une seule pièce, de préférence, sont forgés comme un élément monobloc.
  15. Élément sous pression interne (1) selon l'une des revendications 8 à 14, dans lequel la bride de fixation (6) présente, du côté de ladite une ouverture (70), une surface d'appui (60) pour une zone de bride, plus particulièrement une tête de vis, d'un élément de fixation s'étendant à travers la douille de fixation (8), plus particulièrement d'une vis de fixation, pour le montage de l'élément sous pression interne (1).
EP17710512.9A 2016-03-11 2017-03-08 Élément subissant une pression interne (rail) et procédé de fabrication associé Active EP3426910B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016204025.1A DE102016204025B4 (de) 2016-03-11 2016-03-11 Innendruckbelastetes Bauteil (Rail) sowie Verfahren zu dessen Herstellung
PCT/EP2017/055421 WO2017153460A1 (fr) 2016-03-11 2017-03-08 Élément subissant une pression interne (rail) et procédé de fabrication associé

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EP3426910A1 EP3426910A1 (fr) 2019-01-16
EP3426910B1 true EP3426910B1 (fr) 2021-05-05

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EP (1) EP3426910B1 (fr)
CN (1) CN108779749B (fr)
DE (1) DE102016204025B4 (fr)
WO (1) WO2017153460A1 (fr)

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CN108779749B (zh) 2022-03-11
US20190093614A1 (en) 2019-03-28
WO2017153460A1 (fr) 2017-09-14
DE102016204025B4 (de) 2021-05-27
DE102016204025A1 (de) 2016-07-14
US10982636B2 (en) 2021-04-20
CN108779749A (zh) 2018-11-09
EP3426910A1 (fr) 2019-01-16

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