WO2013075864A1 - Method for creating a positive connection on a hydraulic unit of a vehicle brake system - Google Patents

Method for creating a positive connection on a hydraulic unit of a vehicle brake system Download PDF

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Publication number
WO2013075864A1
WO2013075864A1 PCT/EP2012/068736 EP2012068736W WO2013075864A1 WO 2013075864 A1 WO2013075864 A1 WO 2013075864A1 EP 2012068736 W EP2012068736 W EP 2012068736W WO 2013075864 A1 WO2013075864 A1 WO 2013075864A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
hydraulic unit
brake system
vehicle brake
positive connection
Prior art date
Application number
PCT/EP2012/068736
Other languages
German (de)
French (fr)
Inventor
Ugur Kisa
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
Priority to BR112014011881A priority Critical patent/BR112014011881A2/en
Priority to EP12770042.5A priority patent/EP2782803A1/en
Priority to KR1020147013482A priority patent/KR20140093240A/en
Priority to CN201280056914.9A priority patent/CN103946086A/en
Publication of WO2013075864A1 publication Critical patent/WO2013075864A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/26—Reservoirs
    • 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
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/06—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of high energy impulses, e.g. magnetic energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/06—Applications or arrangements of reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
    • B60T8/368—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units combined with other mechanical components, e.g. pump units, master cylinders

Definitions

  • the invention relates to a method for producing a positive connection between a first component and a second component, in particular a hydraulic unit of a vehicle brake system. Furthermore, the invention relates to a hydraulic unit of a vehicle brake system with a positive connection between a first component and a second component.
  • Hydraulic power units are used in vehicle brake systems for controlling the brake pressures on associated wheel brake cylinders.
  • the hydraulic units generally have a block-shaped housing with hydraulic channels on which a plurality of hydraulic functional components, such as valves and memory are installed.
  • the hydraulic functional components are to be arranged fluid-tight on the hydraulic block.
  • the arrangements must meet high tightness and holding force requirements, which can currently only be achieved with the help of non-positive and positive connections in the form of caulking.
  • a part of the material of the housing is molded over a part of the respective functional component with a caulking punch.
  • a method for producing a positive connection in particular on a hydraulic unit of a vehicle brake system, between a first component and a second component is provided with the following steps: providing the first component to the second component, wherein in the region of the connection to be produced on the second component a supernatant is provided, generating a pulsed electromagnetic field and deforming the supernatant by means of the pulsed electromagnetic field such that the supernatant for producing the positive connection via the adjacent first component is deformed.
  • the invention is based on the finding that in conventional caulking for the production of positive connections with a caulking on the components or components involved high forming forces are required by which it can come in dependence on the material strength of the components to undesirable deformations of adjacent areas.
  • it is an essential goal of the current development, in particular of hydraulic units, to reduce their space and to save weight as much as possible. This leads to a conflict of goals between the required rigidity and that
  • the core of the present invention is that an electromagnetic pulse technology (EMPT) is used for producing a positive connection of components, in particular on a hydraulic unit of a vehicle brake system.
  • EMPT electromagnetic pulse technology
  • This technology uses a coil over the connector guided parts. Through the coil, a current of very high current is supplied for a short time, which is provided by a pulse generator. As a result, an eddy current is induced in metallic workpieces for a short time, which leads to very high electromagnetic forces.
  • the forces accelerate parts or sections of involved components so strongly that these parts or sections deform.
  • the parts or sections can be accelerated so much that they reach a speed of over 200 m / s (meters per second) after only a short distance.
  • This technique is used in conventional methods of electromagnetic pulse technology to bounce the parts or sections after a very short distance against an adjacent, stationary component.
  • the otherwise existing oxide layers in the impact area are released and blown out through the air located between the components.
  • the pure surfaces produced in this way are highly reactive and under extreme contact pressure. This conventionally causes the local formation of a helium-tight metallic cohesive bond by electron exchange.
  • the electromagnetic pulse technology is used to deform parts or section of components in such a way that they clamp and positively restrain adjacent components.
  • a very high electromagnetic force is also exerted on one of the components involved by means of a coil.
  • the force is metered according to the invention in such a way that the part or section of the component is deformed in the direction of the adjacent component and moves over it.
  • a projection is provided on one of the components, which can be deformed with the EMPT.
  • connection technology does not introduce heat into the components. Therefore, metallic materials with very different melting points can be connected in particular in hydraulic units to be produced. In addition, no structural influence occurs due to heat. In particular, positive-locking connections between aluminum alloys and ultra-high-strength steels can be produced without negative influences on their material strength. be put.
  • Such form-fitting connection have in comparison to cohesive also has the advantage that they allow over the life time by micro-movements at the junction a reduction of tensions between the parts.
  • the process used in the invention is non-contact, i. no contact takes place between the coil and the part or section of the component to be deformed.
  • the advantage is that it in particular to none
  • Chip development can come.
  • the first component when the first component is provided on the second component, the first component is particularly preferably provided adjacent to the second component.
  • the provision of this kind leads to a predefined position of the two components relative to one another and according to a positionally accurate embodiment of the connection point according to the invention.
  • the first component used according to the invention is preferably a storage cover of a pressure accumulator, in particular a buffer accumulator of the hydraulic unit.
  • the storage lid can be pressure-resistant attached to the associated housing with the connection technology according to the invention.
  • the storage lid is preferably round, in particular circular in design and is fixedly and positively mounted on its entire circumference according to the inventive method to the associated housing.
  • a shoulder is particularly preferably formed in the housing at a storage opening, into which the storage cover is first inserted before the actual connection.
  • the method according to the invention is furthermore used to connect the housing of a hydraulic unit with a further component or a functional component in a form-fitting manner.
  • the housing is preferably arranged stationary during the formation of such a connection.
  • the housing then forms the support for attaching the respective functional component and can in particular very advantageously by means of a workpiece carrier in the electromagnetic used in the invention Pulse system retracted and also extended again with the attached second component.
  • the housing is made of aluminum, since this material can be processed excellently cutting and also can be processed very well as an electrically conductive material with the connection technology of the invention.
  • FIG. 1 shows a partial section of a first embodiment of a hydraulic unit according to the invention prior to carrying out the method according to the invention
  • Fig. 2 shows the section of FIG. 1 after carrying out the method according to the invention.
  • a hydraulic unit 10 of a not further illustrated vehicle brake system is partially shown, which is designed as a first component of a storage cover 12 made of steel or aluminum and a second component of a housing 14 in the form of a hydraulic block of aluminum.
  • the storage cover 12 serves for fluid-tight and pressure-tight sealing of a circular-cylindrical storage opening 16 formed in the housing 14.
  • annular shoulder 18 is formed on the edge facing outward.
  • 18 of the circular and slightly hat-shaped in cross-section memory cover 12 is inserted with its radially outer portion 20 on a support surface 22.
  • the support surface 22 is substantially flat and the portion 20 is located on her substantially full area.
  • an upwardly projecting, in the illustrated cross section triangular projection 24 is formed, which in the present case also extends annularly around the entire storage opening 16.
  • the Projection 24 also extend only over parts of the circumference of the storage opening 16.
  • the supernatant 24 may also be designed in the form of individual teeth that are regularly or irregularly formed on the edge of the storage opening 16.
  • the projection 24 formed in this way is deformed by means of electromagnetic pulse technology (EMPT) via the section 20 of the storage lid 12.
  • EMPT electromagnetic pulse technology
  • a coil 26 is guided over the supernatant 24 and passed through this approximately 10 s to 40 s, preferably 25 s, a current of very high current.
  • the coil 26 has an underside 28 which is turned, bent or sectionally bent at an angle of approximately 10 ° to 40 °, preferably 25 °.
  • the current provided with such a coil 26 induces in the metallic projection 24 for a short time an eddy current which leads to such high electromagnetic forces that the projection 24 deforms in the direction of the section 20 via the reservoir cover 12.
  • the resulting deformation of the portion 20 acts as a hook which holds the accumulator cover 12 both pressure-resistant and fluid-tight on the housing 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Regulating Braking Force (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

In a method for creating a positive connection, in particular on a hydraulic unit of a vehicle brake system, between a first component (12) and a second component (14), the following steps are carried out: providing the first component (12) on the second component (14), wherein a protrusion (24) is provided on the second component (14) in the region of the connection to be created; generating a pulsed electromagnetic field and shaping the protrusion (24) by means of the pulsed electromagnetic field in such a way that the protrusion (24) is shaped so as to move over the adjacent first component (12) to create the positive connection.

Description

Beschreibung  description
Titel title
Verfahren zum Herstellen einer formschlüssigen Verbindung an einem Hvdrau- likaggregat einer Fahrzeugbremsanlage  A method for producing a positive connection to a Hvdrau- likaggregat a vehicle brake system
Stand der Technik State of the art
Die Erfindung betrifft ein Verfahren zum Herstellen einer formschlüssigen Verbindung zwischen einem ersten Bauteil und einem zweiten Bauteil, insbesondere eines Hydraulikaggregats einer Fahrzeugbremsanlage. Ferner betrifft die Erfindung ein Hydraulikaggregat einer Fahrzeugbremsanlage mit einer formschlüssigen Verbindung zwischen einem ersten Bauteil und einem zweiten Bauteil. The invention relates to a method for producing a positive connection between a first component and a second component, in particular a hydraulic unit of a vehicle brake system. Furthermore, the invention relates to a hydraulic unit of a vehicle brake system with a positive connection between a first component and a second component.
Hydraulikaggregate werden bei Fahrzeugbremsanlagen zum Steuern der Bremsdrücke an zugeordneten Radbremszylindern verwendet. Die Hydraulikaggregate weisen in der Regel ein blockförmiges Gehäuse mit Hydraulikkanälen auf, an dem eine Vielzahl hydraulischer Funktionskomponenten, wie Ventile und Speicher verbaut sind. Die hydraulischen Funktionskomponenten sind an dem Hydraulikblock fluiddicht anzuordnen. Die Anordnungen müssen hohe Dichtheits- und Haltekraftanforderungen erfüllen, was derzeit nur mit Hilfe von kraft- und formschlüssigen Verbindungen in Form von Verstemmungen erreicht werden kann. Bei dem derartigen Verstemmen wird mit einem Verstemmstempel ein Teil des Materials des Gehäuses über einen Teil der jeweiligen Funktionskomponente geformt. Hydraulic power units are used in vehicle brake systems for controlling the brake pressures on associated wheel brake cylinders. The hydraulic units generally have a block-shaped housing with hydraulic channels on which a plurality of hydraulic functional components, such as valves and memory are installed. The hydraulic functional components are to be arranged fluid-tight on the hydraulic block. The arrangements must meet high tightness and holding force requirements, which can currently only be achieved with the help of non-positive and positive connections in the form of caulking. In the case of such caulking, a part of the material of the housing is molded over a part of the respective functional component with a caulking punch.
Es ist ferner bekannt Funktionskomponenten am Gehäuse eines Hydraulikaggregats einer Fahrzeugbremsanlage mittels Torsional-Ultraschallschweissen anzubringen. Dabei wird insbesondere ein Speicherdeckel eines Druckspeichers am Gehäuse druckfest angebracht, indem der Speicherdeckel mittels einer Sonotrode torsional im Ultraschallfrequenzbereich bewegt und auf diese Weise stoffschlüssig mit dem Gehäusematerial verbunden wird. Offenbarung der Erfindung It is also known to attach functional components to the housing of a hydraulic unit of a vehicle brake system by means of torsional ultrasonic welding. In this case, in particular, a storage cover of a pressure accumulator is attached to the housing pressure-resistant by the storage lid by means of a sonotrode torsionally moved in the ultrasonic frequency range and is connected in this way cohesively with the housing material. Disclosure of the invention
Erfindungsgemäß ist ein Verfahren zum Herstellen einer formschlüssigen Ver- bindung, insbesondere an einem Hydraulikaggregat einer Fahrzeugbremsanlage, zwischen einem ersten Bauteil und einem zweiten Bauteil mit folgenden Schritten geschaffen: Bereitstellen des ersten Bauteils an dem zweiten Bauteil, wobei im Bereich der herzustellenden Verbindung am zweiten Bauteil ein Überstand vorgesehen ist, Erzeugen eines gepulsten elektromagnetischen Feldes und Verfor- men des Überstands mittels des gepulsten elektromagnetischen Feldes derart, dass der Überstand zum Herstellen der formschlüssigen Verbindung über das benachbarte erste Bauteil verformt wird. According to the invention, a method for producing a positive connection, in particular on a hydraulic unit of a vehicle brake system, between a first component and a second component is provided with the following steps: providing the first component to the second component, wherein in the region of the connection to be produced on the second component a supernatant is provided, generating a pulsed electromagnetic field and deforming the supernatant by means of the pulsed electromagnetic field such that the supernatant for producing the positive connection via the adjacent first component is deformed.
Die Erfindung basiert auf der Erkenntnis, dass beim herkömmlichen Verstemmen zum Herstellen von formschlüssigen Verbindungen mit einem Verstemmstempel an den beteiligten Bauteilen bzw. Komponenten hohe Umformkräfte benötigt werden, durch die es in Abhängigkeit der Materialfestigkeit der Bauteile zu unerwünschten Deformationen benachbarter Bereiche kommen kann. Es ist aber ein wesentliches Ziel der derzeitigen Entwicklung insbesondere von Hydraulikaggre- gaten, deren Bauraum zu verkleinern und Gewicht möglichst einzusparen. Dies führt zu einem Zielkonflikt zwischen benötigter Steifigkeit um die zu The invention is based on the finding that in conventional caulking for the production of positive connections with a caulking on the components or components involved high forming forces are required by which it can come in dependence on the material strength of the components to undesirable deformations of adjacent areas. However, it is an essential goal of the current development, in particular of hydraulic units, to reduce their space and to save weight as much as possible. This leads to a conflict of goals between the required rigidity and that
verstemmenden Bauteile herum und einem möglichst geringen Bauraum und Gewicht der Bauteile. Bei stoffschlüssigen Torsional-Ultraschallschweißverbindungen ist die Energieübertragung der beteiligten Bauteile und damit deren Ankopplungsverhalten von entscheidender Bedeutung für die Qualität der erzielten Verbindung. Die dabei erforderliche Formgestaltung der Sonotrode kann vergleichsweise aufwendig sein. Da die Sonotrode darüber hinaus ein Verschleißteil darstellt, können hohe Fertigungskosten entstehen. Darüber hinaus können während der Fertigung aufgrund der Torsionsbewegung Späne entstehen. caulking components around and the smallest possible space and weight of the components. In cohesive Torsional ultrasonic welding connections, the energy transfer of the components involved and thus their coupling behavior is of crucial importance for the quality of the connection achieved. The required shape design of the sonotrode can be relatively expensive. In addition, since the sonotrode is a wearing part, high production costs can arise. In addition, chips can be produced during production due to the torsional movement.
Der Kern der vorliegenden Erfindung liegt darin, dass zum Herstellen einer form schlüssigen Verbindung von Bauteilen, insbesondere an einem Hydraulikaggregat einer Fahrzeugbremsanlage, eine elektromagnetische Pulstechnologie (EMPT) verwendet wird. Bei dieser Technologie wird eine Spule über die Verbin dungssteile geführt. Durch die Spule wird kurzzeitig ein Strom sehr hoher Stromstärke geleitet, der von einem Pulsgenerator bereitgestellt wird. Dadurch wird in metallischen Werkstücken kurzzeitig ein Wirbelstrom induziert, der zu sehr hohen elektromagnetischen Kräften führt. Die Kräfte beschleunigen Teile bzw. Abschnit- te von beteiligten Bauteilen derart stark, dass sich diese Teile bzw. Abschnitte verformen. Die Teile bzw. Abschnitte können derart stark beschleunigt werden, dass sie bereits nach kurzer Distanz eine Geschwindigkeiten von über 200 m/s (Meter pro Sekunde) erreichen. Diese Technik wird bei herkömmlichen Verfahren der elektromagnetischen Pulstechnologie dazu verwendet, um die Teile bzw. Abschnitte nach sehr kurzer Distanz gegen ein benachbartes, stationäres Bauteil prallen zu lassen. Bei diesem Aufprall des beschleunigten Teils bzw. Abschnitts auf ein benachbart angeordnetes, stationäres Bauteil werden gemäß herkömmlicher Technologie im Auf- schlagbereich die dort ansonsten bestehenden Oxidschichten gelöst und durch die sich zwischen den Bauteilen befindende Luft ausgeblasen. Die so erzeugten reinen Oberflächen sind hoch reaktiv und stehen unter extremem Kontaktdruck. Dies bewirkt herkömmlich die dortige Bildung einer heliumdichten metallischen stoffschlüssigen Bindung durch Elektronenaustausch. The core of the present invention is that an electromagnetic pulse technology (EMPT) is used for producing a positive connection of components, in particular on a hydraulic unit of a vehicle brake system. This technology uses a coil over the connector guided parts. Through the coil, a current of very high current is supplied for a short time, which is provided by a pulse generator. As a result, an eddy current is induced in metallic workpieces for a short time, which leads to very high electromagnetic forces. The forces accelerate parts or sections of involved components so strongly that these parts or sections deform. The parts or sections can be accelerated so much that they reach a speed of over 200 m / s (meters per second) after only a short distance. This technique is used in conventional methods of electromagnetic pulse technology to bounce the parts or sections after a very short distance against an adjacent, stationary component. In the case of this impact of the accelerated part or section on a stationary component arranged adjacently, according to conventional technology, the otherwise existing oxide layers in the impact area are released and blown out through the air located between the components. The pure surfaces produced in this way are highly reactive and under extreme contact pressure. This conventionally causes the local formation of a helium-tight metallic cohesive bond by electron exchange.
Gemäß der erfindungsgemäßen Lösung wird die elektromagnetische Pulstechnologie dazu verwendet, um Teile bzw. Abschnitt von Bauteilen derart zu verformen, dass sie benachbarte Bauteile klemmen und formschlüssig zurückhalten. Dazu wird mittels einer Spule ebenfalls auf eines der beteiligten Bauteile eine sehr hohe elektromagnetische Kraft ausgeübt. Die Kraft ist gemäß der Erfindung derart dosiert, dass sich der Teil bzw. Abschnitt des Bauteils in Richtung zum benachbarten Bauteil verformt und sich über dieses bewegt. Als verformbarer Teil bzw. Abschnitt ist dazu an einem der Bauteile ein Überstand vorgesehen, der mit der EMPT verformt werden kann. According to the solution according to the invention, the electromagnetic pulse technology is used to deform parts or section of components in such a way that they clamp and positively restrain adjacent components. For this purpose, a very high electromagnetic force is also exerted on one of the components involved by means of a coil. The force is metered according to the invention in such a way that the part or section of the component is deformed in the direction of the adjacent component and moves over it. As a deformable part or section, a projection is provided on one of the components, which can be deformed with the EMPT.
Die derartige Verbindungstechnologie bringt keine Wärme in die Bauteile ein. Daher können insbesondere bei herzustellenden Hydraulikaggregaten auch metallische Werkstoffe mit stark unterschiedlichen Schmelzpunkten verbunden werden. Zudem tritt keine Gefügebeeinflussung durch Wärme auf. So können insbe- sondere formschlüssige Verbindungen zwischen Aluminiumlegierungen und höchstfesten Stählen ohne negative Einflüsse auf deren Werkstofffestigkeit her- gestellt werden. Derartige formschlüssige Verbindung haben im Vergleich zu stoffschlüssigen ferner den Vorteil, dass sie über die Lebensdauer hinweg durch Mikrobewegungen an der Verbindungsstelle einen Abbau von Spannungen zwischen den Baueilen ermöglichen. Such connection technology does not introduce heat into the components. Therefore, metallic materials with very different melting points can be connected in particular in hydraulic units to be produced. In addition, no structural influence occurs due to heat. In particular, positive-locking connections between aluminum alloys and ultra-high-strength steels can be produced without negative influences on their material strength. be put. Such form-fitting connection have in comparison to cohesive also has the advantage that they allow over the life time by micro-movements at the junction a reduction of tensions between the parts.
Der erfindungsgemäß verwendete Prozess erfolgt berührungslos, d.h. zwischen der Spule und dem zu verformenden Teil bzw. Abschnitt des Bauteils findet kein Kontakt statt. Der Vorteil liegt darin, dass es insbesondere zu keiner The process used in the invention is non-contact, i. no contact takes place between the coil and the part or section of the component to be deformed. The advantage is that it in particular to none
Späneentwicklung kommen kann. Chip development can come.
Besonders bevorzugt wird bei dem erfindungsgemäßen Verfahren beim Bereitstellen des ersten Bauteils an dem zweiten Bauteil das erste Bauteil an dem zweiten Bauteil anliegend bereitgestellt. Die derartige Bereitstellung führt zu einer vordefinierten Lage der beiden Bauteile relativ zueinander und entsprechend ei- ner lagegenauen Ausführung der erfindungsgemäßen Verbindungsstelle. In the method according to the invention, when the first component is provided on the second component, the first component is particularly preferably provided adjacent to the second component. The provision of this kind leads to a predefined position of the two components relative to one another and according to a positionally accurate embodiment of the connection point according to the invention.
Das erfindungsgemäß verwendete erste Bauteil ist vorzugsweise ein Speicherdeckel eines Druckspeichers, insbesondere eines Pufferspeichers des Hydraulikaggregats. Der Speicherdeckel kann mit der erfindungsgemäßen Verbindungs- technologie druckfest am zugehörigen Gehäuse angebracht werden. Der Speicherdeckel ist vorzugsweise rund, insbesondere kreisrund gestaltet und wird an seinem gesamten Umfang gemäß dem erfindungsgemäßen Verfahren an dem zugehörigen Gehäuse ortsfest und formschlüssig angebracht. An der derartigen ringförmigen Verbindungsstelle ist besonders bevorzugt in dem Gehäuse ein Ab- satz an einer Speicheröffnung ausgebildet, in den der Speicherdeckel vor dem eigentlichen Verbinden zunächst eingelegt wird. Mit dem Absatz ist ferner bevorzugt zugleich der erfindungsgemäß vorgesehene Überstand des Gehäuses als zweites Bauteil über den Speicherdeckel als erstes Bauteil gestaltet. Vorzugsweise wird, wie bereits erwähnt, ferner das erfindungsgemäße Verfahren dazu verwendet, das Gehäuse eines Hydraulikaggregats mit einem weiteren Bauteil bzw. einer Funktionskomponente formschlüssig zu verbinden. Das Gehäuse wird während der Ausbildung der derartigen Verbindung vorzugsweise stationär angeordnet. Das Gehäuse bildet dann das Auflager zum Anbringen der jeweiligen Funktionskomponente und kann insbesondere sehr vorteilhaft mittels eines Werkstückträgers in die erfindungsgemäß eingesetzte elektromagnetische Pulsanlage eingefahren und auch wieder samt dem daran angebrachten zweiten Bauteil ausgefahren werden. The first component used according to the invention is preferably a storage cover of a pressure accumulator, in particular a buffer accumulator of the hydraulic unit. The storage lid can be pressure-resistant attached to the associated housing with the connection technology according to the invention. The storage lid is preferably round, in particular circular in design and is fixedly and positively mounted on its entire circumference according to the inventive method to the associated housing. At the annular connection point of this kind, a shoulder is particularly preferably formed in the housing at a storage opening, into which the storage cover is first inserted before the actual connection. With the paragraph is also preferred at the same time the inventively provided supernatant of the housing designed as a second component on the storage lid as the first component. Preferably, as already mentioned, the method according to the invention is furthermore used to connect the housing of a hydraulic unit with a further component or a functional component in a form-fitting manner. The housing is preferably arranged stationary during the formation of such a connection. The housing then forms the support for attaching the respective functional component and can in particular very advantageously by means of a workpiece carrier in the electromagnetic used in the invention Pulse system retracted and also extended again with the attached second component.
Besonders bevorzugt ist das Gehäuse aus Aluminium hergestellt, da dieses Material sich hervorragend spanend verarbeiten lässt und ferner als elektrisch leitfähiges Material auch mit der erfindungsgemäßen Verbindungstechnologie sehr gut verarbeitet werden kann. Particularly preferably, the housing is made of aluminum, since this material can be processed excellently cutting and also can be processed very well as an electrically conductive material with the connection technology of the invention.
Nachfolgend wird ein Ausführungsbeispiel der erfindungsgemäßen Lösung anhand der beigefügten schematischen Zeichnungen näher erläutert. Es zeigt: An exemplary embodiment of the solution according to the invention will be explained in more detail below with reference to the attached schematic drawings. It shows:
Fig. 1 einen teilweisen Schnitt eines ersten Ausführungsbeispiels eines erfindungsgemäßen Hydraulikaggregats vor dem Ausführen des erfindungsgemäßen Verfahrens und 1 shows a partial section of a first embodiment of a hydraulic unit according to the invention prior to carrying out the method according to the invention and
Fig. 2 den Schnitt gemäß Fig. 1 nach dem Ausführen des erfindungsgemäßen Verfahrens.  Fig. 2 shows the section of FIG. 1 after carrying out the method according to the invention.
In den Fig. ist teilweise ein Hydraulikaggregat 10 einer weiter nicht veranschaulichten Fahrzeugbremsanlage dargestellt, das als erstes Bauteil aus einem Speicherdeckel 12 aus Stahl oder Aluminium und als zweites Bauteil aus einem Gehäuse 14 in Form eines Hydraulikblocks aus Aluminium gestaltet ist. Der Speicherdeckel 12 dient zum fluiddichten und druckfesten Verschließen einer im Gehäuse 14 ausgebildeten kreiszylindrischen Speicheröffnung 16. In the figures, a hydraulic unit 10 of a not further illustrated vehicle brake system is partially shown, which is designed as a first component of a storage cover 12 made of steel or aluminum and a second component of a housing 14 in the form of a hydraulic block of aluminum. The storage cover 12 serves for fluid-tight and pressure-tight sealing of a circular-cylindrical storage opening 16 formed in the housing 14.
An der Speicheröffnung 16 ist dabei an dem nach außen gewandten Rand ein ringförmiger Absatz 18 ausgeformt. In diesem Absatz 18 ist der kreisrunde und im Querschnitt leicht hutförmige Speicherdeckel 12 mit seinem radial äußeren Abschnitt 20 auf einer Auflagefläche 22 eingelegt. At the storage opening 16, an annular shoulder 18 is formed on the edge facing outward. In this paragraph 18 of the circular and slightly hat-shaped in cross-section memory cover 12 is inserted with its radially outer portion 20 on a support surface 22.
Die Auflagefläche 22 ist dabei im Wesentlichen eben und der Abschnitt 20 liegt an ihr im Wesentlichen vollflächig auf. The support surface 22 is substantially flat and the portion 20 is located on her substantially full area.
Radial außen ist neben dem am Gehäuse 14 eingeformten Absatz 18 ein nach oben abstehender, im dargestellten Querschnitt dreieckiger Überstand 24 ausgebildet, der sich vorliegend ebenfalls ringförmig um die gesamte Speicheröffnung 16 erstreckt. Bei einem alternativen Ausführungsbeispiel kann sich der Überstand 24 auch nur über Teile des Umfangs der Speicheröffnung 16 erstrecken. Insbesondere kann der Überstand 24 auch in Form von einzelnen regelmäßig oder unregelmäßig am Rand der Speicheröffnung 16 angeformten Zähnen gestaltet sein. Radially outside, in addition to the housing 18 formed on the shoulder 18 an upwardly projecting, in the illustrated cross section triangular projection 24 is formed, which in the present case also extends annularly around the entire storage opening 16. In an alternative embodiment, the Projection 24 also extend only over parts of the circumference of the storage opening 16. In particular, the supernatant 24 may also be designed in the form of individual teeth that are regularly or irregularly formed on the edge of the storage opening 16.
Der derart ausgebildete Überstand 24 wird mittels elektromagnetischer Pulstechnologie (EMPT) über den Abschnitt 20 des Speicherdeckels 12 verformt. Dadurch wird eine formschlüssige, den Speicherdeckel 12 am Gehäuse 14 druckfest zurückhaltende Verbindung geschaffen. The projection 24 formed in this way is deformed by means of electromagnetic pulse technology (EMPT) via the section 20 of the storage lid 12. As a result, a form-fitting, the storage cover 12 on the housing 14 pressure-resistant restrained connection is created.
Dazu wird eine Spule 26 über den Überstand 24 geführt und durch diese ca. 10 s bis 40 s, vorzugsweise 25 s, ein Strom sehr hoher Stromstärke geleitet. Die Spule 26 weist dabei eine zum Überstand 24 gewandte, geknickte bzw. abschnittsweise in einem Winkel von ca. 10° bis 40°, vorzugsweise 25° abgewinkelte Unterseite 28 auf. Der mit der derartigen Spule 26 bereitgestellte Strom induziert in dem metallischen Überstand 24 kurzzeitig einen Wirbelstrom, der zu derart hohen elektromagnetischen Kräften führt, dass sich der Überstand 24 in Richtung zum Abschnitt 20 über den Speicherdeckel 12 verformt. Die dadurch erzielte Verformung des Abschnitts 20 wirkt als ein Haken, der den Speicherdeckel 12 sowohl druckfest als auch fluiddicht am Gehäuse 14 zurückhält. For this purpose, a coil 26 is guided over the supernatant 24 and passed through this approximately 10 s to 40 s, preferably 25 s, a current of very high current. In this case, the coil 26 has an underside 28 which is turned, bent or sectionally bent at an angle of approximately 10 ° to 40 °, preferably 25 °. The current provided with such a coil 26 induces in the metallic projection 24 for a short time an eddy current which leads to such high electromagnetic forces that the projection 24 deforms in the direction of the section 20 via the reservoir cover 12. The resulting deformation of the portion 20 acts as a hook which holds the accumulator cover 12 both pressure-resistant and fluid-tight on the housing 14.

Claims

Ansprüche claims
Verfahren zum Herstellen einer formschlüssigen Verbindung, insbesondere an einem Hydraulikaggregat einer Fahrzeugbremsanlage, zwischen einem ersten Bauteil (12) und einem zweiten Bauteil (14) mit den Schritten: Method for producing a positive connection, in particular on a hydraulic unit of a vehicle brake system, between a first component (12) and a second component (14) with the steps:
Bereitstellen des ersten Bauteils (12) an dem zweiten Bauteil (14), wobei im Bereich der herzustellenden Verbindung am zweiten Bauteil (14) ein Überstand (24) vorgesehen ist,  Providing the first component (12) on the second component (14), wherein a projection (24) is provided on the second component (14) in the region of the connection to be produced,
Erzeugen eines gepulsten elektromagnetischen Feldes und Verformen des Überstands (24) mittels des gepulsten elektromagnetischen Feldes derart, dass der Überstand (24) zum Herstellen der formschlüssigen Verbindung über das benachbarte erste Bauteil (14) verformt wird.  Generating a pulsed electromagnetic field and deforming the supernatant (24) by means of the pulsed electromagnetic field such that the overhang (24) for establishing the positive connection is deformed via the adjacent first component (14).
Verfahren nach Anspruch 1 , Method according to claim 1,
bei dem beim Bereitstellen des ersten Bauteils (12) an dem zweiten Bauteil (14) das erste Bauteil (12) an dem zweiten Bauteil (14) anliegend bereitgestellt wird.  in which, when the first component (12) is provided on the second component (14), the first component (12) is provided adjacent to the second component (14).
Verfahren nach Anspruch 1 oder 2, Method according to claim 1 or 2,
bei dem als erstes Bauteil ein Speicherdeckel (12) eines Hydraulikaggregats (10) einer Fahrzeugbremsanlage bereitgestellt wird.  in which a storage cover (12) of a hydraulic unit (10) of a vehicle brake system is provided as the first component.
Verfahren nach einem der Ansprüche 1 bis 3, Method according to one of claims 1 to 3,
bei dem als zweites Bauteil ein Gehäuse (14) eines Hydraulikaggregats (10) einer Fahrzeugbremsanlage bereitgestellt wird.  in which a housing (14) of a hydraulic unit (10) of a vehicle brake system is provided as the second component.
Hydraulikaggregat (10) einer Fahrzeugbremsanlage mit einer formschlüssigen Verbindung zwischen einem ersten Bauteil (12) und einem zweiten Bauteil (14), bei dem die Verbindung mittels elektromagnetischer Pulstechnologie hergestellt ist. Hydraulikaggregat einer Fahrzeugbremsanlage nach Anspruch 5, bei dem das erste Bauteil ein Speicherdeckel (12) ist. Hydraulic unit (10) of a vehicle brake system with a positive connection between a first component (12) and a second component (14), wherein the connection is made by means of electromagnetic pulse technology. Hydraulic unit of a vehicle brake system according to claim 5, wherein the first component is a storage cover (12).
Hydraulikaggregat einer Fahrzeugbremsanlage nach Anspruch 5 oder 6, bei dem das zweite Bauteil ein Gehäuse (14) des Hydraulikaggregats (10) ist. Hydraulic unit of a vehicle brake system according to claim 5 or 6, wherein the second component is a housing (14) of the hydraulic unit (10).
8. Hydraulikaggregat einer Fahrzeugbremsanlage nach Anspruch 7, 8. Hydraulic unit of a vehicle brake system according to claim 7,
bei dem das Gehäuse (14) aus Aluminium hergestellt ist.  wherein the housing (14) is made of aluminum.
PCT/EP2012/068736 2011-11-21 2012-09-24 Method for creating a positive connection on a hydraulic unit of a vehicle brake system WO2013075864A1 (en)

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BR112014011881A BR112014011881A2 (en) 2011-11-21 2012-09-24 process for producing a perfect fit connection of a hydraulic unit of a vehicle brake system
EP12770042.5A EP2782803A1 (en) 2011-11-21 2012-09-24 Method for creating a positive connection on a hydraulic unit of a vehicle brake system
KR1020147013482A KR20140093240A (en) 2011-11-21 2012-09-24 Method for creating a positive connection on a hydraulic unit of a vehicle brake system
CN201280056914.9A CN103946086A (en) 2011-11-21 2012-09-24 Method for creating a positive connection on a hydraulic unit of a vehicle brake system

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DE102011086682A DE102011086682A1 (en) 2011-11-21 2011-11-21 Method for producing a positive connection to a hydraulic unit of a vehicle brake system

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FR3026037B1 (en) * 2014-09-23 2017-03-10 Adm28 S Ar L COIL FOR WELDING MAGNETIC IMPULSE TUBULAR PIECES AND METHOD FOR WELDING THE SAME
CN114273769B (en) * 2021-12-30 2023-08-08 华瞬(深圳)智能装备有限公司 Welding device for power battery strap of new energy automobile
DE102022213962A1 (en) 2022-12-20 2024-06-20 Robert Bosch Gesellschaft mit beschränkter Haftung Method for joining a first component into an associated receptacle of a second component

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WO2005002777A1 (en) * 2003-07-07 2005-01-13 Pulsar Welding Ltd. Magnetic pulse welding method and apparatus for sealing a vessel and a sealed vessel
US20050109769A1 (en) * 2003-11-21 2005-05-26 Mcclure John L. Electromagnetic hemming machine and method for joining sheet metal layers
WO2007132468A1 (en) * 2006-05-16 2007-11-22 Pulsar Welding Ltd. Methods of sealing high pressure vessels using magnetic pulsing with high radial impact speed; vessels manufacturing according such methods

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CN103946086A (en) 2014-07-23

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