EP2825335A1 - Method for producing a valve, and tool for stamping a dome in an anchor pin of a valve - Google Patents

Method for producing a valve, and tool for stamping a dome in an anchor pin of a valve

Info

Publication number
EP2825335A1
EP2825335A1 EP13703824.6A EP13703824A EP2825335A1 EP 2825335 A1 EP2825335 A1 EP 2825335A1 EP 13703824 A EP13703824 A EP 13703824A EP 2825335 A1 EP2825335 A1 EP 2825335A1
Authority
EP
European Patent Office
Prior art keywords
embossing
anchor pin
valve
tool
face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13703824.6A
Other languages
German (de)
French (fr)
Other versions
EP2825335B1 (en
Inventor
Pierre-Marie Rochas
Samuel ROBIN
Elian VERDIER
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2825335A1 publication Critical patent/EP2825335A1/en
Application granted granted Critical
Publication of EP2825335B1 publication Critical patent/EP2825335B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/20—Making machine elements valve parts
    • B21K1/22—Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled

Definitions

  • the present invention relates to a method for producing a valve, in particular an electromagnetically actuated pressure control valve for a high-pressure accumulator of an internal combustion engine, wherein the valve comprises an axially slidably received in a valve housing anchor pin, which has an embossed introduced calotte on an end face.
  • the invention relates to a tool for embossing a dome in an end face of an anchor pin of a valve, in particular an electromagnetically actuated pressure control valve for a high-pressure accumulator
  • the field of application of the present invention extends to valves, in particular to pressure control valves, as in high-pressure accumulators of
  • the fuel system pressure in the high-pressure accumulator is kept substantially constant by means of a pressure regulating valve.
  • Pressure control valve has the task to set and maintain the pressure in the high-pressure accumulator depending on the load condition of the engine. It opens at high pressure in the high-pressure accumulator, so that a part of the fuel from the
  • High pressure accumulator passes back to the fuel tank via a manifold. At low pressure in the high-pressure accumulator, it seals the High-pressure side against the low-pressure side, wherein an anchor pin presses a serving as a closing element valve ball in a seal seat of a valve body.
  • the anchor pin is embossed within a valve housing. For this purpose, a stamping ball is placed in the valve seat of the valve body, after which the anchor pin is inserted in a guide bore of a valve housing. A defined embossing force is applied to the anchor pin in order to impress a dome in the end face of the anchor pin by plastic deformation.
  • the anchor pin is removed from the valve housing to remove the embossing ball and use a serving as a closing element valve ball, which has a diameter which is smaller than the diameter of the embossing ball. Thereafter, the mounting of the embossed anchor pin in the valve body.
  • the dome on the end face of the anchor pin has the task to guide the valve ball in the direction of a conical valve seat in the valve body and to limit a radial movement with respect to the longitudinal axis of the anchor pin.
  • embossing the calotte is further caused by work hardening an increase in the strength and hardness of the anchor pin in the region of its end face, which is associated with an increase in the wear resistance.
  • a disadvantage of the known solution is that the production time is increased by a double assembly or disassembly of the anchor pin, which is necessary by replacing the embossing ball by the valve ball.
  • ball misalignments may occur. Due to a function-related play between the guide bore and the anchor pin of about 19-37 ⁇ it can lead to unwanted elastic and / or plastic deformation of the anchor pin. These have the consequence that large variations in the depth of the embossed dome can occur. In addition, you can
  • the object is based on a method for producing a valve according to the preamble of claim 1 in conjunction with the
  • the embossing of the calotte takes place outside of the valve housing by means of a tool. This eliminates a change of an embossing ball in a valve housing within the manufacturing process of the dome and thus eliminates a possible swap the embossing ball with a valve ball. In addition, unwanted plastic deformations of a cone-shaped
  • Valve seat of a valve body avoided.
  • the invention includes the technical teaching that when embossing the dome of the anchor pin on a guide bore in a guide body of the
  • the guiding of the anchor pin counteracts a deformation of the anchor pin along its longitudinal axis and thus counteracts coaxiality errors when impressing the calotte.
  • the manufacturing accuracy of the dome increases, whereby the life of the valve is increased.
  • embossing comprises the following steps: a) insertion of the anchor pin with the end face ahead into the guide bore of the guide body of the tool, b) application of a defined embossing force on an end face of the anchor pin facing away from the end face of the anchor pin coaxially to the anchor pin longitudinal axis in the direction of an end of the guide bore, at least partially spherically shaped embossing body, wherein the end face of the anchor pin is plastically deformed according to the geometry of the at least partially spherically shaped embossing body,
  • the anchor pin After embossing the dome in the end face of the anchor pin, the anchor pin can be mounted in the valve body, so that dismantling due to a ball change is no longer necessary.
  • step b) is preferably ended when the anchor pin strikes a stop face of the stamping body. This option proves to be particularly helpful in setting a precise depth of the imprinted dome.
  • the abutment of the anchor pin is detected on the abutment surface of the embossing body based on a sudden increase in the applied embossing force.
  • Embossing body increases due to one of the stop surface
  • a tool for producing an anchor pin of a valve, which comprises a guide body with a guide bore and a received in the guide bore embossing body for plastic
  • Deformation of the end face of the anchor pin comprises, wherein the diameter of the guide bore with respect to the diameter of the anchor pin is selected such that between inserted anchor pin and guide body a game ⁇ 15 ⁇ , preferably ⁇ 10 ⁇ remains.
  • an axial clearance of 5 ⁇ not below.
  • Guide body contributes to the manufacturing accuracy of the dome decisive, since the anchor bolt in the guide bore due to the low clearance with acting on him embossing force has only a very small alternative. Thus, a deformation, in particular bending of the anchor pin is effectively minimized and coaxial errors avoided.
  • the spherically shaped part of the embossing body is surrounded by a radially extending annular surface serving as a stop surface.
  • the abutment surface serves as a contact surface for the end face of the anchor pin and initiates the end of the embossing process in contact with the anchor pin.
  • the spherically shaped part of the embossing body is an embossing ball inserted in a depression of an end face of the embossing body.
  • the advantage of the embossing ball inserted in the recess of the end face of the embossing body is the possibility to replace the embossing ball. A change of the embossing ball appears at elevated
  • the radially extending abutment surface of the embossing body is only minimally worn due to the low force.
  • Embossing body has in comparison to the material of the anchor pin preferably a higher hardness and strength, whereby the embossing of the calotte is possible in the end face of the anchor pin.
  • a conically shaped section of the embossing body adjoins the spherically shaped part of the embossing body or the annular surface surrounding the embossing body.
  • the invention includes the technical teaching that a transverse bore for venting the guide bore is formed in the guide body at the level of the spherically shaped part of the embossing body. Due to the proposed low clearance between the anchor pin and guide bore, the air in the guide bore should be removed when the anchor pin is dipped into the guide bore. It is advantageous if the
  • Transverse hole is arranged as deep as possible in the guide bore to avoid clogging of the cross-hole used for venting by the anchor pin.
  • Fig. 1 is a schematic sectional view of an inventive
  • Fig. 2 is an enlarged schematic sectional view of
  • Fig. 3 is a schematic sectional view of an alternative
  • Fig. 4 is a schematic sectional view of a further alternative
  • Embodiment of a stamping body Embodiment of a stamping body.
  • an anchor bolt is located in a guide bore 3 of a guide body 4, wherein the anchor bolt comprises an anchor pin 1 and an anchor plate 11.
  • the guide bore 3 at one end Embossing 6 with a stamping ball 8 on.
  • the tool is in this case constructed in two parts, wherein the lower part (A) of the tool serves the embossing body 6 as a stop surface.
  • the upper part (B) serves as a guide body 3 and is mounted on the lower part (A) of the tool such that the embossing body 6 penetrates into the guide bore 3 from a direction opposite to the direction of penetration of the anchor pin 1 direction.
  • the upper and the lower part (A + B) of the tool by means of a screw 12 are positively connected to each other.
  • FIG. 1 shows an enlarged view of the embossing body 6 of Figure 1.
  • Anchor pin 1 is disposed above the embossing body 6, wherein in a
  • the embossing ball 8 is arranged coaxially to the anchor pin longitudinal axis 5.
  • the depression in the end face of the embossing body 6 is surrounded by a radially extending annular surface, wherein a conically shaped section of the embossing body 6 adjoins the annular surface surrounding the embossing body 6.
  • This conically shaped portion facilitates insertion of the embossing body 6 in the guide bore 3.
  • a transverse bore 9 for venting
  • the embossing body 6 which is shown in more detail in FIG. 3 and is located in the guide bore 3, has on its end face a spherically shaped part, to which a conically shaped section of the embossing body 6 adjoins.
  • the spherically shaped part of the embossing body 6 is coaxial with
  • Anchor pin longitudinal axis 5 wherein above the embossing body of the anchor pin. 1 is arranged.
  • a transverse bore 9 is formed for venting the guide bore 3.
  • the embossing body 6 is arranged in the guide bore 3.
  • the embossing body 6 has coaxially with the anchor pin longitudinal axis 5 on a spherically shaped part, which is surrounded by a radially extending and serving as a stop surface 7 annular surface.
  • Embossing body 6 penetrates into the end face of the anchor pin 1 and deforms it plastically.
  • a dome 2 is formed in the end face of the anchor pin 1.
  • the dome 2 serves to guide a valve ball, not shown here, on a valve seat in a valve body.
  • a transverse bore 9 is formed for venting the guide bore 3.
  • Valve seat is realized in the valve body.
  • Such geometric shapes could be cones, truncated cones, pyramids, truncated pyramids and cylinders.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetically Actuated Valves (AREA)
  • Lift Valve (AREA)
  • Forging (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a method for producing a valve, in particular an electromagnetically actuatable pressure control valve for a high-pressure accumulator of an internal combustion engine. The valve comprises an anchor pin (1) which is received in a valve housing in an axially movable manner and which has a dome (2) at one end face, said dome being introduced by means of a stamping process. The dome (2) stamping process is carried out outside of the valve housing by means of a tool. A tool for stamping a dome (2) into an end face of an anchor pin (1) of such a valve comprises a guide body (4) with a guide bore (3) and a stamping body (6) which is received in the guide bore (3) for plastically deforming the end face of the anchor pin (1), the diameter of said guide bore (3) being selected in relation to the diameter of the anchor pin (1) such that a clearance of less than 15 micrometers, preferably 10 micrometers, remains between the inserted anchor pin (1) and the guide body (4).

Description

Titel:  Title:
Verfahren zur Herstellung eines Ventils sowie Werkzeug zum Prägen einer Kalotte in einem Ankerstift eines Ventils  Method for producing a valve and tool for embossing a dome in an anchor pin of a valve
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Ventils, insbesondere eines elektromagnetisch betätigbaren Druckregelventils für einen Hochdruckspeicher einer Verbrennungskraftmaschine, wobei das Ventil einen in einem Ventilgehäuse axial verschiebbar aufgenommenen Ankerstift umfasst, welcher an einer Stirnfläche eine mittels Prägen eingebrachte Kalotte aufweist. The present invention relates to a method for producing a valve, in particular an electromagnetically actuated pressure control valve for a high-pressure accumulator of an internal combustion engine, wherein the valve comprises an axially slidably received in a valve housing anchor pin, which has an embossed introduced calotte on an end face.
Ferner betrifft die Erfindung ein Werkzeug zum Prägen einer Kalotte in eine Stirnfläche eines Ankerstifts eines Ventils, insbesondere eines elektromagnetisch betätigbaren Druckregelventils für einen Hochdruckspeicher einer Furthermore, the invention relates to a tool for embossing a dome in an end face of an anchor pin of a valve, in particular an electromagnetically actuated pressure control valve for a high-pressure accumulator
Verbrennungskraftmaschine. Internal combustion engine.
Das Einsatzgebiet der vorliegenden Erfindung erstreckt sich auf Ventile, insbesondere auf Druckregelventile, wie sie in Hochdruckspeichern von The field of application of the present invention extends to valves, in particular to pressure control valves, as in high-pressure accumulators of
Verbrennungskraftmaschinen von PKW, NKW, Notstromaggregaten sowie Lokomotiven und Schiffen vorkommen. Internal combustion engines of passenger cars, commercial vehicles, emergency generators and locomotives and ships occur.
Stand der Technik State of the art
Im Betrieb einer selbstzündenden Verbrennungskraftmaschine mit einem Hochdruckspeicher wird der Kraftstoffsystemdruck in dem Hochdruckspeicher mittels eines Druckregelventils im Wesentlichen konstant gehalten. Das During operation of a self-igniting internal combustion engine with a high-pressure accumulator, the fuel system pressure in the high-pressure accumulator is kept substantially constant by means of a pressure regulating valve. The
Druckregelventil hat die Aufgabe, den Druck im Hochdruckspeicher abhängig vom Lastzustand des Motors einzustellen und zu halten. Es öffnet bei zu hohem Druck im Hochdruckspeicher, so dass ein Teil des Kraftstoffs aus dem Pressure control valve has the task to set and maintain the pressure in the high-pressure accumulator depending on the load condition of the engine. It opens at high pressure in the high-pressure accumulator, so that a part of the fuel from the
Hochdruckspeicher über eine Sammelleitung zurück zum Kraftstoffbehälter gelangt. Bei niedrigem Druck im Hochdruckspeicher dichtet es die Hochdruckseite gegen die Niederdruckseite ab, wobei ein Ankerstift eine als Schließelement dienende Ventilkugel in einen Dichtungssitz eines Ventilkörpers drückt. Bei der Herstellung eines solchen Druckregelventils wird der Ankerstift innerhalb eines Ventilgehäuses geprägt. Dazu wird eine Prägekugel in den Ventilsitz des Ventilkörpers gelegt, wonach der Ankerstift in einer Führungsbohrung eines Ventilgehäuses eingesetzt wird. Eine definierte Prägekraft wird auf den Ankerstift aufgebracht, um durch plastisches Verformen eine Kalotte in die Stirnfläche des Ankerstiftes einzuprägen. Nach dem Prägen der Kalotte, wird der Ankerstift aus dem Ventilgehäuse entnommen, um die Prägekugel zu entfernen und eine als Schließelement dienende Ventilkugel einzusetzen, welche einen Durchmesser aufweist, der kleiner ist als der Durchmesser der Prägekugel. Danach erfolgt die Montage des geprägten Ankerstiftes in das Ventilgehäuse. High pressure accumulator passes back to the fuel tank via a manifold. At low pressure in the high-pressure accumulator, it seals the High-pressure side against the low-pressure side, wherein an anchor pin presses a serving as a closing element valve ball in a seal seat of a valve body. In the manufacture of such a pressure regulating valve, the anchor pin is embossed within a valve housing. For this purpose, a stamping ball is placed in the valve seat of the valve body, after which the anchor pin is inserted in a guide bore of a valve housing. A defined embossing force is applied to the anchor pin in order to impress a dome in the end face of the anchor pin by plastic deformation. After embossing the dome, the anchor pin is removed from the valve housing to remove the embossing ball and use a serving as a closing element valve ball, which has a diameter which is smaller than the diameter of the embossing ball. Thereafter, the mounting of the embossed anchor pin in the valve body.
Die Kalotte an der Stirnfläche des Ankerstiftes hat die Aufgabe, die Ventilkugel in Richtung eines kegelförmigen Ventilsitzes im Ventilkörper zu führen und eine radiale Bewegung im Bezug auf die Längsachse des Ankerstiftes zu limitieren. Beim Einprägen der Kalotte wird ferner durch Kaltverfestigung eine Erhöhung der Festigkeit und der Härte des Ankerstiftes im Bereich seiner Stirnfläche hervorgerufen, die mit einer Erhöhung des Verschleißwiderstands einhergeht. The dome on the end face of the anchor pin has the task to guide the valve ball in the direction of a conical valve seat in the valve body and to limit a radial movement with respect to the longitudinal axis of the anchor pin. When embossing the calotte is further caused by work hardening an increase in the strength and hardness of the anchor pin in the region of its end face, which is associated with an increase in the wear resistance.
Ein Nachteil der bekannten Lösung besteht darin, dass durch eine doppelte Montage bzw. Demontage des Ankerstiftes, die durch ein Auswechseln der Prägekugel durch die Ventilkugel nötig ist, die Fertigungszeit erhöht wird. Zudem können Kugelverwechslungen auftreten. Aufgrund eines funktionsbedingten Spiels zwischen der Führungsbohrung und dem Ankerstift von ca. 19-37 μηη kann es zu ungewollten elastischen und/oder plastischen Verformungen des Ankerstiftes kommen. Diese haben zur Folge, dass große Streuungen in der Tiefe der eingeprägten Kalotte auftreten können. Darüber hinaus können A disadvantage of the known solution is that the production time is increased by a double assembly or disassembly of the anchor pin, which is necessary by replacing the embossing ball by the valve ball. In addition, ball misalignments may occur. Due to a function-related play between the guide bore and the anchor pin of about 19-37 μηη it can lead to unwanted elastic and / or plastic deformation of the anchor pin. These have the consequence that large variations in the depth of the embossed dome can occur. In addition, you can
Koaxialitätsfehler zwischen der Kalotte im Ankerstift und dem Ventilsitz im Ventilkörper auftreten, so dass ein optimaler Kontakt zwischen Ventilkugel und dem kegelförmigen Ventilsitz nicht mehr gewährleistet wird. Ferner können plastische Verformungen am Ventilsitz auftreten. Das hat zur Folge, dass die Dichtfunktion der Ventilkugel beeinträchtigt wird und Probleme bei der Druckregelung die Leistungsfähigkeit der Verbrennungskraftmaschine Coaxial errors between the cap in the anchor pin and the valve seat in the valve body occur, so that an optimal contact between the valve ball and the conical valve seat is no longer guaranteed. Furthermore, plastic deformations can occur on the valve seat. This has the consequence that the sealing function of the valve ball is impaired and problems in the Pressure control the performance of the internal combustion engine
einschränken. limit.
Offenbarung der Erfindung Disclosure of the invention
Es ist daher die Aufgabe der vorliegenden Erfindung, ein Verfahren und ein Werkzeug bereitzustellen, welche eine höhere Fertigungsgenauigkeit beim Prägen einer Kalotte in eine Stirnfläche eines Ankerstiftes ermöglichen. Ferner soll die Fertigungszeit verringert werden. It is therefore an object of the present invention to provide a method and a tool which allow a higher manufacturing accuracy when embossing a dome in an end face of an anchor pin. Furthermore, the production time should be reduced.
Die Aufgabe wird ausgehend von einem Verfahren zur Herstellung eines Ventils gemäß dem Oberbegriff von Anspruch 1 in Verbindung mit dessen The object is based on a method for producing a valve according to the preamble of claim 1 in conjunction with the
kennzeichnenden Merkmalen gelöst. Ferner wird die Aufgabe ausgehend von einem Werkzeug zum Prägen einer Kalotte in eine Stirnfläche eines Ankerstifts eines Ventils gemäß dem Oberbegriff von Anspruch 6 in Verbindung mit dessen kennzeichnenden Merkmalen gelöst. Vorteilhafte Weiterbildungen der Erfindung gehen aus den nachfolgenden abhängigen Ansprüchen hervor. solved characterizing features. Furthermore, the object is achieved starting from a tool for embossing a dome in an end face of an anchor pin of a valve according to the preamble of claim 6 in conjunction with its characterizing features. Advantageous developments of the invention will become apparent from the following dependent claims.
Erfindungsgemäß erfolgt das Prägen der Kalotte außerhalb des Ventilgehäuses mittels eines Werkzeuges. Dadurch entfällt ein Wechsel einer Prägekugel in einem Ventilgehäuse innerhalb des Fertigungsprozesses der Kalotte und damit auch ein mögliches Vertauschen der Prägekugel mit einer Ventilkugel. Darüber hinaus werden ungewollte plastische Verformungen eines kegelförmigen According to the invention, the embossing of the calotte takes place outside of the valve housing by means of a tool. This eliminates a change of an embossing ball in a valve housing within the manufacturing process of the dome and thus eliminates a possible swap the embossing ball with a valve ball. In addition, unwanted plastic deformations of a cone-shaped
Ventilsitzes eines Ventilkörpers vermieden. Valve seat of a valve body avoided.
Die Erfindung schließt die technische Lehre ein, dass beim Prägen der Kalotte der Ankerstift über eine Führungsbohrung in einem Führungskörper des The invention includes the technical teaching that when embossing the dome of the anchor pin on a guide bore in a guide body of the
Werkzeuges geführt wird. Das Führen des Ankerstiftes wirkt einer Verformung des Ankerstiftes entlang seiner Längsachse und somit Koaxialitätsfehlern beim Einprägen der Kalotte entgegen. Die Fertigungsgenauigkeit der Kalotte nimmt zu, wobei die Lebensdauer des Ventils erhöht wird. Tool is guided. The guiding of the anchor pin counteracts a deformation of the anchor pin along its longitudinal axis and thus counteracts coaxiality errors when impressing the calotte. The manufacturing accuracy of the dome increases, whereby the life of the valve is increased.
Es wird weiterhin vorgeschlagen, dass das Prägen folgende Schritte umfasst: a) Einführen des Ankerstiftes mit der Stirnfläche voraus in die Führungsbohrung des Führungskörpers des Werkzeuges, b) Aufbringen einer definierten Prägekraft auf ein der Stirnfläche abgewandtes Ende des Ankerstiftes koaxial zur Ankerstiftlängsachse in Richtung eines am Ende der Führungsbohrung aufgenommenen, zumindest teilweise sphärisch geformten Prägekörpers, wobei die Stirnfläche des Ankerstifts gemäß der Geometrie des zumindest teilweise sphärisch geformten Prägekörpers plastisch verformt wird, It is further proposed that embossing comprises the following steps: a) insertion of the anchor pin with the end face ahead into the guide bore of the guide body of the tool, b) application of a defined embossing force on an end face of the anchor pin facing away from the end face of the anchor pin coaxially to the anchor pin longitudinal axis in the direction of an end of the guide bore, at least partially spherically shaped embossing body, wherein the end face of the anchor pin is plastically deformed according to the geometry of the at least partially spherically shaped embossing body,
c) Entnehmen des Ankerstiftes aus der Führungsbohrung des Führungskörpers des Werkzeuges und c) removing the anchor pin from the guide bore of the guide body of the tool and
d) Einsetzen des Ankerstiftes in das Ventilgehäuse. d) inserting the anchor pin into the valve body.
Eine derartige Abfolge der Verfahrensschritte gewährleistet kurze Taktzeiten und erhöht die Produktivität der Herstellung. Nach dem Prägen der Kalotte in die Stirnfläche des Ankerstiftes, kann der Ankerstift in das Ventilgehäuse montiert werden, so dass eine Demontage aufgrund eines Kugelwechsels nicht mehr nötig ist. Such a sequence of process steps ensures short cycle times and increases the productivity of the production. After embossing the dome in the end face of the anchor pin, the anchor pin can be mounted in the valve body, so that dismantling due to a ball change is no longer necessary.
Des Weiteren bevorzugt wird der Schritt b) beendet, wenn der Ankerstift an einer Anschlagfläche des Prägekörpers anschlägt. Diese Möglichkeit erweist sich als besonders hilfreich, um eine präzise Tiefe der eingeprägten Kalotte einzustellen. Bei einem Kontakt des Ankerstiftes mit der Anschlagsfläche des Prägekörpers wird die Krafteinwirkung auf das der Stirnfläche abgewandte Ende des In addition, step b) is preferably ended when the anchor pin strikes a stop face of the stamping body. This option proves to be particularly helpful in setting a precise depth of the imprinted dome. Upon contact of the anchor pin with the abutment surface of the embossing body, the force on the end face remote from the end of the
Ankerstiftes gestoppt und der Prägevorgang beendet.  Anchor pin stopped and the stamping process finished.
Vorzugsweise wird das Anschlagen des Ankerstiftes an der Anschlagfläche des Prägekörpers anhand eines sprunghaften Anstiegs der aufgebrachten Prägekraft erkannt. Beim Kontakt des Ankerstiftes mit der Anschlagsfläche des Preferably, the abutment of the anchor pin is detected on the abutment surface of the embossing body based on a sudden increase in the applied embossing force. When contact of the anchor pin with the stop surface of the
Prägekörpers erhöht sich aufgrund eines von der Anschlagsfläche  Embossing body increases due to one of the stop surface
entgegengebrachten Widerstandes die aufgebrachte Prägekraft derart schnell, dass dies ein Signal zum Entlasten des Ankerstiftes darstellt. Zur Herstellung eines Ankerstiftes eines Ventils wird ferner ein Werkzeug angegeben, das einen Führungskörper mit einer Führungsbohrung sowie einen in der Führungsbohrung aufgenommenen Prägekörper zur plastischen opposing resistance, the applied embossing force so fast that this represents a signal to relieve the anchor pin. For producing an anchor pin of a valve, a tool is further provided which comprises a guide body with a guide bore and a received in the guide bore embossing body for plastic
Verformung der Stirnfläche des Ankerstiftes umfasst, wobei der Durchmesser der Führungsbohrung in Bezug auf den Durchmesser des Ankerstiftes derart gewählt ist, dass zwischen eingeführtem Ankerstift und Führungskörper ein Spiel < 15 μηι, vorzugsweise < 10 μηι verbleibt. Vorteilhafterweise wird ein axiales Spiel von 5 μηη nicht unterschritten. Deformation of the end face of the anchor pin comprises, wherein the diameter of the guide bore with respect to the diameter of the anchor pin is selected such that between inserted anchor pin and guide body a game <15 μηι, preferably <10 μηι remains. Advantageously, an axial clearance of 5 μηη not below.
Das geringe Spiel zwischen dem eingeführten Ankerstift und dem The small game between the introduced anchor pin and the
Führungskörper trägt zur Fertigungsgenauigkeit der Kalotte maßgebend bei, da der Ankerbolzen in der Führungsbohrung aufgrund des geringen Spiels bei auf ihn einwirkender Prägekraft nur eine sehr geringe Ausweichmöglichkeit hat. Somit wird eine Verformung, insbesondere Biegung des Ankerstiftes effektiv minimiert und Koaxialitätsfehler vermieden. Guide body contributes to the manufacturing accuracy of the dome decisive, since the anchor bolt in the guide bore due to the low clearance with acting on him embossing force has only a very small alternative. Thus, a deformation, in particular bending of the anchor pin is effectively minimized and coaxial errors avoided.
Erfindungsgemäß ist der sphärisch geformte Teil des Prägekörpers von einer radial verlaufenden und als Anschlagfläche dienenden Ringfläche umgeben. Die Anschlagsfläche dient als Kontaktfläche für die Stirnfläche des Ankerstiftes und leitet bei einem Kontakt mit der Ankerstift das Ende des Prägeprozesses ein. Alternativ oder ergänzend wird vorgeschlagen, dass der sphärisch geformte Teil des Prägekörpers eine in einer Vertiefung einer Stirnfläche des Prägekörpers eingesetzte Prägekugel ist. Der Vorteil der in der Vertiefung der Stirnfläche des Prägekörpers eingesetzten Prägekugel ist die Möglichkeit die Prägekugel auszuwechseln. Ein Wechsel der Prägekugel erscheint bei erhöhten According to the invention, the spherically shaped part of the embossing body is surrounded by a radially extending annular surface serving as a stop surface. The abutment surface serves as a contact surface for the end face of the anchor pin and initiates the end of the embossing process in contact with the anchor pin. Alternatively or additionally, it is proposed that the spherically shaped part of the embossing body is an embossing ball inserted in a depression of an end face of the embossing body. The advantage of the embossing ball inserted in the recess of the end face of the embossing body is the possibility to replace the embossing ball. A change of the embossing ball appears at elevated
Verschleißerscheinungen der Prägekugel als sinnvoll, da ein Wechsel des gesamten Prägekörpers entfällt. Wear phenomena of the embossing ball makes sense, since a change of the entire embossing body is eliminated.
Die radial verlaufende Anschlagfläche des Prägekörpers wird aufgrund der geringen Krafteinwirkung nur minimal verschlissen. Der Werkstoff des The radially extending abutment surface of the embossing body is only minimally worn due to the low force. The material of the
Prägekörpers weist im Vergleich zum Werkstoff des Ankerstiftes bevorzugt eine höhere Härte und Festigkeit auf, wodurch das Einprägen der Kalotte in die Stirnfläche des Ankerstiftes möglich ist. Embossing body has in comparison to the material of the anchor pin preferably a higher hardness and strength, whereby the embossing of the calotte is possible in the end face of the anchor pin.
Vorzugsweise schließt sich an den sphärisch geformten Teil des Prägekörpers oder an die den Prägekörper umgebende Ringfläche ein konisch geformter Abschnitt des Prägekörpers an. Diese Ausbildung des Prägekörpers ermöglicht ein leichtes Einführen des Prägekörpers in die dafür vorgesehene Preferably, a conically shaped section of the embossing body adjoins the spherically shaped part of the embossing body or the annular surface surrounding the embossing body. This design of the embossing body allows easy insertion of the embossing body in the space provided
Führungsbohrung. Ein Verkannten des Prägekörpers beim Einführen in die Führungsbohrung wird durch den konisch geformten Abschnitt sicher vermieden. Die Erfindung schließt die technische Lehre ein, dass im Führungskörper auf Höhe des sphärisch geformten Teils des Prägekörpers eine Querbohrung zur Entlüftung der Führungsbohrung ausgebildet ist. Aufgrund des vorgeschlagenen geringen Spiels zwischen Ankerstift und Führungsbohrung sollte die in der Führungsbohrung befindliche Luft beim Eintauchen des Ankerstifts in die Führungsbohrung abgeführt werden. Dabei ist es von Vorteil, wenn die Guide bore. A tilting of the embossing body during insertion into the guide bore is reliably avoided by the conically shaped portion. The invention includes the technical teaching that a transverse bore for venting the guide bore is formed in the guide body at the level of the spherically shaped part of the embossing body. Due to the proposed low clearance between the anchor pin and guide bore, the air in the guide bore should be removed when the anchor pin is dipped into the guide bore. It is advantageous if the
Querbohrung so tief wie möglich in der Führungsbohrung angeordnet ist, um ein Zusetzten der zum Entlüften dienenden Querbohrung durch den Ankerstift zu vermeiden. Transverse hole is arranged as deep as possible in the guide bore to avoid clogging of the cross-hole used for venting by the anchor pin.
Weitere, die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung der bevorzugten Ausführungsbeispiele der Erfindung anhand von Figuren näher dargestellt. Further measures improving the invention will be described in more detail below together with the description of the preferred embodiments of the invention with reference to figures.
Ausführungsbeispiele Es zeigen: Embodiments show:
Fig. 1 eine schematische Schnittdarstellung eines erfindungsgemäßen Fig. 1 is a schematic sectional view of an inventive
Werkzeuges zum Prägen eines Ankerstiftes,  Tool for embossing an anchor pin,
Fig. 2 eine vergrößerte schematische Schnittdarstellung des Fig. 2 is an enlarged schematic sectional view of
Prägekörpers des Werkzeuges der Fig. 1 ,  Embossing body of the tool of Fig. 1,
Fig. 3 eine schematische Schnittdarstellung eines alternativen Fig. 3 is a schematic sectional view of an alternative
Ausführungsbeispiels eines Prägekörpers, und  Embodiment of a stamping body, and
Fig. 4 eine schematische Schnittdarstellung eines weiteren alternativen Fig. 4 is a schematic sectional view of a further alternative
Ausführungsbeispiels eines Prägekörpers.  Embodiment of a stamping body.
Nach Figur 1 befindet sich in einer Führungsbohrung 3 eines Führungskörpers 4 ein Ankerbolzen, wobei der Ankerbolzen einen Ankerstift 1 und eine Ankerplatte 1 1 umfasst. Zudem weist die Führungsbohrung 3 an einem Ende einen Prägekörper 6 mit einer Prägekugel 8 auf. Das Werkzeug ist vorliegend zweiteilig aufgebaut, wobei der untere Teil (A) des Werkzeuges dem Prägekörper 6 als Anschlagfläche dient. Der obere Teil (B) dient als Führungskörper 3 und wird derart auf dem unteren Teil (A) des Werkzeuges montiert, dass der Prägekörper 6 aus einer zur Eindringrichtung des Ankerstifts 1 entgegengesetzten Richtung in die Führungsbohrung 3 eindringt. Ferner sind der obere und der untere Teil (A+B) des Werkzeuges mittels einer Schraube 12 miteinander kraftschlüssig verbunden. Beim Aufbringen einer definierten Prägekraft F koaxial zur Ankerstiftlängsachse 5 auf ein der Stirnfläche abgewandtes Ende des Ankerstiftes 1 dringt die unterhalb des Ankerstifts 1 koaxial zur Ankerstiftlängsachse 5 befindlichen Prägekugel 8 des Prägekörpers 6 in die Stirnfläche des Ankerstifts 1 ein. Gemäß der According to FIG. 1, an anchor bolt is located in a guide bore 3 of a guide body 4, wherein the anchor bolt comprises an anchor pin 1 and an anchor plate 11. In addition, the guide bore 3 at one end Embossing 6 with a stamping ball 8 on. The tool is in this case constructed in two parts, wherein the lower part (A) of the tool serves the embossing body 6 as a stop surface. The upper part (B) serves as a guide body 3 and is mounted on the lower part (A) of the tool such that the embossing body 6 penetrates into the guide bore 3 from a direction opposite to the direction of penetration of the anchor pin 1 direction. Further, the upper and the lower part (A + B) of the tool by means of a screw 12 are positively connected to each other. When applying a defined stamping force F coaxial with the anchor pin longitudinal axis 5 on a side facing away from the end face of the anchor pin 1 penetrates below the anchor pin 1 coaxial with the anchor pin longitudinal axis 5 embossing ball 8 of the embossing body 6 in the end face of the anchor pin 1 a. According to the
Geometrie der Prägekugel 8 wird die Stirnfläche des Ankerstiftes 1 plastisch verformt, so dass im Ankerstift 1 eine Kalotte 2 ausgebildet wird. Um ein Geometry of the embossing ball 8, the end face of the anchor pin 1 is plastically deformed, so that in the anchor pin 1, a cap 2 is formed. To one
Eindringen des Ankerstiftes 1 in die Führungsbohrung 3 zu erleichtern, ist im Führungskörper 4 auf Höhe der Prägekugel 8 eine Querbohrung 9 zur Entlüftung der Führungsbohrung 3 ausgebildet. Figur 2 zeigt eine vergrößerte Darstellung des Prägekörpers 6 aus Figur 1. Der To facilitate penetration of the anchor pin 1 in the guide bore 3, a transverse bore 9 is formed in the guide body 4 at the level of the embossing ball 8 for venting the guide bore 3. Figure 2 shows an enlarged view of the embossing body 6 of Figure 1. The
Ankerstift 1 ist oberhalb des Prägekörpers 6 angeordnet, wobei in einer Anchor pin 1 is disposed above the embossing body 6, wherein in a
Vertiefung an der Stirnfläche des Prägekörpers 6 die Prägekugel 8 koaxial zur Ankerstiftlängsachse 5 angeordnet ist. Die Vertiefung in der Stirnfläche des Prägekörpers 6 ist von einer radial verlaufenden Ringfläche umgeben, wobei an die den Prägekörper 6 umgebende Ringfläche ein konisch geformter Abschnitt des Prägekörpers 6 anschließt. Dieser konisch geformte Abschnitt erleichtert das Einführen des Prägekörpers 6 in die Führungsbohrung 3. Im Führungskörper 4 auf Höhe der Prägekugel 8 ist eine Querbohrung 9 zur Entlüftung der Depression on the end face of the embossing body 6, the embossing ball 8 is arranged coaxially to the anchor pin longitudinal axis 5. The depression in the end face of the embossing body 6 is surrounded by a radially extending annular surface, wherein a conically shaped section of the embossing body 6 adjoins the annular surface surrounding the embossing body 6. This conically shaped portion facilitates insertion of the embossing body 6 in the guide bore 3. In the guide body 4 at the level of the embossing ball 8 is a transverse bore 9 for venting
Führungsbohrung 3 ausgebildet. Guide bore 3 is formed.
Der in der Figur 3 näher dargestellte in der Führungsbohrung 3 befindliche Prägekörper 6 weist an seiner Stirnfläche einen sphärisch geformten Teil auf, an dem sich ein konisch geformter Abschnitt des Prägekörpers 6 anschließt. Der sphärisch geformte Teil des Prägekörpers 6 befindet sich koaxial zur The embossing body 6, which is shown in more detail in FIG. 3 and is located in the guide bore 3, has on its end face a spherically shaped part, to which a conically shaped section of the embossing body 6 adjoins. The spherically shaped part of the embossing body 6 is coaxial with
Ankerstiftlängsachse 5, wobei oberhalb des Prägekörpers der Ankerstift 1 angeordnet ist. Auf Höhe des sphärisch geformten Teils des Prägekörpers 6 ist eine Querbohrung 9 zur Entlüftung der Führungsbohrung 3 ausgebildet. Anchor pin longitudinal axis 5, wherein above the embossing body of the anchor pin. 1 is arranged. At the level of the spherically shaped part of the embossing body 6, a transverse bore 9 is formed for venting the guide bore 3.
Gemäß Figur 4 ist der Prägekörper 6 in der Führungsbohrung 3 angeordnet. Der Prägekörper 6 weist koaxial zur Ankerstiftlängsachse 5 einen sphärisch geformten Teil auf, der von einer radial verlaufenden und als Anschlagfläche 7 dienenden Ringfläche umgeben wird. Der sphärisch geformten Teil des According to FIG. 4, the embossing body 6 is arranged in the guide bore 3. The embossing body 6 has coaxially with the anchor pin longitudinal axis 5 on a spherically shaped part, which is surrounded by a radially extending and serving as a stop surface 7 annular surface. The spherical shaped part of the
Prägekörpers 6 dringt in die Stirnfläche des Ankerstiftes 1 ein und verformt sie plastisch. Dabei bildet sich in der Stirnfläche des Ankerstiftes 1 eine Kalotte 2 ab. Die Kalotte 2 dient der Führung einer hier nicht dargestellten Ventilkugel auf einen Ventilsitz in einem Ventilkörper. Auf Höhe des sphärisch geformten Teils des Prägekörpers 6 ist eine Querbohrung 9 zur Entlüftung der Führungsbohrung 3 ausgebildet. Embossing body 6 penetrates into the end face of the anchor pin 1 and deforms it plastically. In this case, a dome 2 is formed in the end face of the anchor pin 1. The dome 2 serves to guide a valve ball, not shown here, on a valve seat in a valve body. At the level of the spherically shaped part of the embossing body 6, a transverse bore 9 is formed for venting the guide bore 3.
Die Erfindung ist nicht beschränkt auf das vorstehend beschriebene bevorzugte Ausführungsbeispiel. Es sind vielmehr auch Abwandlungen hiervon denkbar, welche vom Schutzbereich der nachfolgenden Ansprüche mit umfasst sind. So ist es beispielsweise auch möglich, anstelle einer Querbohrung 9 zur Entlüftung der Führungsbohrung 3, Längsbohrungen oder Nuten entlang des Prägekörpers 6 oder der den Prägekörper 6 aufzunehmenden Führungsbohrung 3 anzuordnen. The invention is not limited to the preferred embodiment described above. On the contrary, modifications are conceivable which are included in the scope of protection of the following claims. Thus, it is also possible, for example, instead of a transverse bore 9 for venting the guide bore 3, longitudinal bores or grooves along the embossing body 6 or the male body 6 to be recorded guide bore 3 to arrange.
Des Weiteren ist es denkbar, das Werkzeug einteilig auszubilden, wobei die Führungsbohrung 3 als Sacklochbohrung ausgebildet sein sollte, um den Furthermore, it is conceivable to form the tool in one piece, wherein the guide bore 3 should be formed as a blind hole to the
Prägekörper 6 am Ende der Sacklochbohrung aufzunehmen. Statt einer To record embossing body 6 at the end of the blind hole. Instead of one
Prägekugel 8 sind auch andere geometrische Formen möglich, um einen Embossing ball 8, other geometric shapes are possible to a
Ankerstift 1 derart zu prägen, dass das Führen einer Ventilkugel auf den To emboss anchor pin 1 such that the guiding of a valve ball on the
Ventilsitz im Ventilkörper realisiert wird. Solche geometrischen Formen könnten Kegel, Kegelstümpfe, Pyramiden, Pyramidenstümpfe und Zylinder sein. Valve seat is realized in the valve body. Such geometric shapes could be cones, truncated cones, pyramids, truncated pyramids and cylinders.

Claims

Ansprüche claims
1 . Verfahren zur Herstellung eines Ventils, insbesondere eines elektromagnetisch betätigbaren Druckregelventils für einen Hochdruckspeicher einer Verbrennungskraftmaschine, wobei das Ventil einen in einem 1 . A method for producing a valve, in particular an electromagnetically actuated pressure control valve for a high-pressure accumulator of an internal combustion engine, wherein the valve in a
Ventilgehäuse axial verschiebbar aufgenommenen Ankerstift (1 ) umfasst, welcher an einer Stirnfläche eine mittels Prägen eingebrachte Kalotte (2) aufweist, Valve housing axially slidably received anchor pin (1), which has on one end face a introduced by embossing calotte (2),
dadurch gekennzeichnet, dass das Prägen der Kalotte (2) außerhalb des Ventilgehäuses mittels eines Werkzeuges erfolgt. characterized in that the embossing of the calotte (2) takes place outside of the valve housing by means of a tool.
2. Verfahren nach Anspruch 1 , 2. The method according to claim 1,
dadurch gekennzeichnet, dass beim Prägen der Kalotte (2) der Ankerstift (1 ) über eine Führungsbohrung (3) in einem Führungskörper (4) des Werkzeuges geführt wird. characterized in that when embossing the dome (2) of the anchor pin (1) via a guide bore (3) in a guide body (4) of the tool is guided.
3. Verfahren nach Anspruch 1 oder 2, 3. The method according to claim 1 or 2,
dadurch gekennzeichnet, dass das Prägen folgende Schritte umfasst: characterized in that embossing comprises the steps of:
a) Einführen des Ankerstiftes (1 ) mit der Stirnfläche voraus in die a) insertion of the anchor pin (1) with the end face ahead in the
Führungsbohrung (3) des Führungskörpers (4) des Werkzeuges, Guide bore (3) of the guide body (4) of the tool,
b) Aufbringen einer definierten Prägekraft (F) auf ein der Stirnfläche b) applying a defined embossing force (F) on one of the end face
abgewandtes Ende des Ankerstiftes (1 ) koaxial zur Ankerstiftlängsachse (5) in Richtung eines am Ende der Führungsbohrung (3) aufgenommenen, zumindest teilweise sphärisch geformten Prägekörpers (6), wobei die Stirnfläche des Ankerstifts (1 ) gemäß der Geometrie des zumindest teilweise sphärisch geformten Prägekörpers (6) plastisch verformt wird, facing away from the anchor pin (1) coaxially with the anchor pin longitudinal axis (5) in the direction of an end of the guide bore (3) received, at least partially spherical shaped embossing body (6), wherein the end face of the anchor pin (1) according to the geometry of the at least partially spherically shaped Embossing body (6) is plastically deformed,
c) Entnehmen des Ankerstiftes (1 ) aus der Führungsbohrung (3) des c) removing the anchor pin (1) from the guide bore (3) of the
Führungskörpers (4) des Werkzeuges und Guide body (4) of the tool and
d) Einsetzen des Ankerstiftes (1 ) in das Ventilgehäuse. d) Inserting the anchor pin (1) in the valve housing.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass der Schritt b) beendet wird, wenn der Ankerstift (1 ) an einer Anschlagfläche (7) des Prägekörpers (6) anschlägt. 4. The method according to claim 3, characterized in that the step b) is terminated when the anchor pin (1) abuts a stop surface (7) of the embossing body (6).
5. Verfahren nach Anspruch 4, 5. The method according to claim 4,
dadurch gekennzeichnet, dass das Anschlagen des Ankerstiftes (1 ) an der Anschlagfläche (7) des Prägekörpers (6) anhand eines sprunghaften Anstiegs der aufgebrachten Prägekraft (F) erkannt wird. characterized in that the abutment of the anchor pin (1) on the stop surface (7) of the embossing body (6) by means of a sudden increase of the applied embossing force (F) is detected.
6. Werkzeug zum Prägen einer Kalotte (2) in eine Stirnfläche eines Ankerstifts (1 ) eines Ventils, insbesondere eines elektromagnetisch betätigbaren Druckregelventils für einen Hochdruckspeicher einer 6. Tool for embossing a dome (2) in an end face of an anchor pin (1) of a valve, in particular an electromagnetically actuated pressure control valve for a high-pressure accumulator
Verbrennungskraftmaschine, Internal combustion engine,
dadurch gekennzeichnet, dass das Werkzeug einen Führungskörper (4) mit einer Führungsbohrung (3) sowie einen in der Führungsbohrung (3) characterized in that the tool comprises a guide body (4) with a guide bore (3) and one in the guide bore (3)
aufgenommenen Prägekörper (6) zur plastischen Verformung der Stirnfläche des Ankerstiftes (1 ) umfasst, wobei der Durchmesser der Führungsbohrung (3) in Bezug auf den Durchmesser des Ankerstiftes (1 ) derart gewählt ist, dass zwischen eingeführtem Ankerstift (1 ) und Führungskörper (4) ein Spiel < 15 μηη, vorzugsweise < 10 μηη verbleibt. received embossing body (6) for plastic deformation of the end face of the anchor pin (1), wherein the diameter of the guide bore (3) with respect to the diameter of the anchor pin (1) is selected such that between inserted anchor pin (1) and guide body (4 ) a game <15 μηη, preferably <10 μηη remains.
7. Werkzeug nach Anspruch 6, 7. Tool according to claim 6,
dadurch gekennzeichnet, dass der sphärisch geformte Teil des Prägekörpers (6) von einer radial verlaufenden und als Anschlagfläche (7) dienenden characterized in that the spherically shaped part of the embossing body (6) of a radially extending and serving as a stop surface (7)
Ringfläche umgeben ist und/oder eine in einer Vertiefung einer Stirnfläche des Prägekörpers (6) eingesetzte Prägekugel (8) ist. Ring surface is surrounded and / or in a recess of an end face of the embossing body (6) inserted embossing ball (8).
8. Werkzeug nach Anspruch 6 oder 7, 8. Tool according to claim 6 or 7,
dadurch gekennzeichnet, dass sich an den sphärisch geformten Teil des Prägekörpers (6) oder an die den Prägekörper (6) umgebende Ringfläche ein konisch geformter Abschnitt des Prägekörpers (6) anschließt. characterized in that adjoining the spherically shaped part of the embossing body (6) or to the embossing body (6) surrounding annular surface a conically shaped portion of the embossing body (6).
9. Werkzeug nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass im Führungskörper (4) auf Höhe des sphärisch geformten Teils des Prägekörpers (6) eine Querbohrung (9) zur Entlüftung der Führungsbohrung (3) ausgebildet ist. 9. Tool according to one of claims 6 to 8, characterized in that in the guide body (4) at the level of the spherically shaped part of the embossing body (6) a transverse bore (9) for venting the guide bore (3) is formed.
EP13703824.6A 2012-03-15 2013-02-13 Method for producing a valve Active EP2825335B1 (en)

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FR1252328A FR2988021B1 (en) 2012-03-15 2012-03-15 METHOD OF MAKING A VALVE AND A TOOL FOR MATURING A CAP IN THE INDUCTION PIN OF A VALVE
PCT/EP2013/052886 WO2013135451A1 (en) 2012-03-15 2013-02-13 Method for producing a valve, and tool for stamping a dome in an anchor pin of a valve

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WO2013135451A1 (en) 2013-09-19
CN104169019A (en) 2014-11-26
IN2014DN07314A (en) 2015-04-24
JP5976134B2 (en) 2016-08-23
JP2015510082A (en) 2015-04-02
FR2988021A1 (en) 2013-09-20
CN104169019B (en) 2016-08-24
EP2825335B1 (en) 2018-12-05
FR2988021B1 (en) 2015-01-09

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