EP1154138B1 - Procédé pour fabriquer un corps de papillon et corps de papillon ainsi obtenu - Google Patents

Procédé pour fabriquer un corps de papillon et corps de papillon ainsi obtenu Download PDF

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Publication number
EP1154138B1
EP1154138B1 EP20010107670 EP01107670A EP1154138B1 EP 1154138 B1 EP1154138 B1 EP 1154138B1 EP 20010107670 EP20010107670 EP 20010107670 EP 01107670 A EP01107670 A EP 01107670A EP 1154138 B1 EP1154138 B1 EP 1154138B1
Authority
EP
European Patent Office
Prior art keywords
throttle valve
metal cylinder
housing
injection moulding
supporting body
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.)
Expired - Lifetime
Application number
EP20010107670
Other languages
German (de)
English (en)
Other versions
EP1154138A3 (fr
EP1154138A2 (fr
Inventor
Carlos Backes
Rüdiger Mörbe
Horst SCHÄFER
Thomas Hannewald
Armin Seeger
Rolf Oppermann
Michael Haede
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1154138A2 publication Critical patent/EP1154138A2/fr
Publication of EP1154138A3 publication Critical patent/EP1154138A3/fr
Application granted granted Critical
Publication of EP1154138B1 publication Critical patent/EP1154138B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M9/00—Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type; Carburettors having fuel-air mixing chambers of variable shape or position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • F02D9/104—Shaping of the flow path in the vicinity of the flap, e.g. having inserts in the housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/107—Manufacturing or mounting details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0402—Cleaning, repairing, or assembling
    • Y10T137/0491—Valve or valve element assembling, disassembling, or replacing
    • Y10T137/0525—Butterfly valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making
    • Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making

Definitions

  • the invention relates to a method for producing a housing for a throttle valve assembly that has a throttle opening for a throttle valve has, wherein the housing is injection molded from plastic and is at least in the area during the injection molding process of the throttle valve partially forming the throttle opening is encapsulated by plastic. Furthermore, the invention relates to a Throttle body with a housing that has a throttle opening for a Has throttle valve, which is made of plastic by injection molding Housing a metal cylinder partially enclosed by plastic has, which forms the throttle opening at least in the region of the throttle valve.
  • Throttle body To control the amount of fresh gas in a motor vehicle are usually Throttle body used. Throttle body includes a housing with a throttle opening and one arranged in the throttle opening Flow regulator. The throttle body takes for the passage of a certain one Fresh gas amount a certain position in the throttle opening. This is the throttle element can be controlled mechanically or electronically.
  • Throttle body are usually made of plastic or made of metal. Throttle body made of metal, for example Aluminum, are made, can be particularly small tolerances exhibit. Small tolerances are then especially for a throttle valve assembly required in the area of the throttle valve if a particularly precise Opening and closing the throttle valve is required. In the closing area In the throttle valve, these requirements also become leakage air requirements called.
  • Metal housings of throttle body show however Disadvantage that after a manufacture of the housing, for example in Die casting process, a complex reworking of the housing required is. For example, careful reworking is often the most important thing Bearing of the throttle valve shaft provided extensions of the housing required around the throttle valve shaft bearings without canting into the housing to be able to fit.
  • Throttle body fittings made of plastic have a lower one Weight as the housing of throttle body, which essentially are made of metal, especially aluminum. Furthermore, that is also Plastic material particularly easy to different geometric shapes of the housing adjustable. For injection molded Plastic housings can also be used, for example, bearings for the Throttle valve shaft bearing, to be injected into the housing.
  • Injection molded plastic body of throttle body have the disadvantage, however, that during and after the Shrink injection molding process.
  • housings warp after removal from the mold, i.e. when removing it from the injection mold deform.
  • throttle body also made of plastic are throttle body not particularly dimensionally stable in a particularly large temperature range.
  • housings of throttle valve bodies are with one Motor vehicle exposed to outside temperatures of up to -40 ° C. on the other hand the temperature of the throttle valve body can be reduced during operation of the throttle valve body rise to over 100 ° C. These big temperature fluctuations can cause adverse deformation of the plastic in the swivel area of the throttle valve. These deformations in turn can lead to the particularly high accuracy of fit of the throttle valve in the housing decreases over time.
  • Particularly high accuracy of fit means, for example, accuracy of fit of the housing the throttle body in the range of 0 to 30 ⁇ m, provided the housing in relation to the measure for the throttle opening, for example the ISO tolerance subject.
  • the particularly high leakage air requirements especially when the idle position Throttle valve, can no longer be observed.
  • This is associated with an enlarged one Fuel consumption and reduced exhaust gas quality.
  • DE 43 34 180 A1 describes a housing made of plastic for one Throttle body known in the swivel range of the throttle valve a ring-shaped insert is integrated. That is completely encapsulated in plastic Insert improves the dimensional stability of the housing of the throttle valve assembly, can, however, change shape due to the high Pressure loads when spraying the plastic in the swivel area of the Do not reliably prevent throttle valve. An interaction of the through the throttle valve connecting medium with the plastic still leads to changes in the shape of the plastic and thus the throttle opening, even if they are no longer as drastic as without the ring-shaped insert would be the case.
  • the invention is therefore based on the object of a method for production specify a housing for a throttle valve connector of the type mentioned above, where the dimensional stability of the metal cylinder during the injection molding process and the dimensional stability of the housing especially after demolding is reliably guaranteed.
  • a throttle valve connector is said be specified, the housing even with particularly large temperature fluctuations has a particularly high dimensional stability.
  • This object is achieved according to the invention in relation to the method solved that before the injection molding process against the inner surface of the metal cylinder a spreader core is spread during the injection molding process Inner surface of the metal cylinder is at least partially supported by the expanding core is and after the injection molding process to remove the expanding core the outer circumference of the expanding core is reduced from the interior of the metal cylinder becomes.
  • the invention is based on the consideration that a dimensional stability of the housing after removal from the mold, it is particularly reliably guaranteed if the housing is in the area of the throttle opening during the injection molding process has dimensionally stable elements.
  • a particularly simple training a dimensionally stable element at least for a portion of the throttle opening is a metal cylinder that is hollow on the inside.
  • the problem arises that support bodies that hold the metal cylinder during of the injection molding process, often grooves or roundness during demolding left in the metal cylinder.
  • Grooves or roundness arise usually when the support body is moved out of the metal cylinder, especially when loosening the support body from the inner jacket of the metal cylinder. These striations or roundness can cause the housing of the throttle valve body, for example, one for the throttle opening does not have a predetermined tolerance. These striations or roundness can removed by means of a subsequent mechanical processing of the housing be, which proves to be very time-consuming and the manufacturing effort of the housing increased significantly. A supporting body that holds the metal cylinder supports during the injection molding process, then leaves no marks or roundness in the housing when the supporting body is during of the injection molding process against the housing and spreads during demolding in terms of its outer dimensions.
  • the expansion core advantageously has an expansion device and a die Spreading device at least partially enclosing outer jacket.
  • the outer shell of the expanding core is then used in the injection molding process the spreading device spread radially against the inner surface of the metal cylinder.
  • the Outer jacket of the expansion body radially against the inner surface of the metal cylinder spread.
  • the expansion core is removed from the interior of the metal cylinder by means of the spreading device a despreading of the outer shell of the expanding core is carried out.
  • the outer sheath can be radially spread apart and radially expanded, thereby the function of the expanding core with a particularly small number of elements is guaranteed in a particularly simple manner.
  • Spreading and despreading the spreading device takes place mechanically or hydraulically.
  • the outer shell of the expanding core is advantageously used during the injection molding process at least partially from the expanding device of the expanding core pressed flat against the inner surface of the metal cylinder.
  • the outer jacket of the The expanding core is thus shaped in such a way that it spreads flat by means of the expanding device the inner surface of the metal cylinder is expandable, whereby the expansion core one exert particularly homogeneous pressure on the inner surface of the metal cylinder can.
  • one is also in various forms of throttle opening Support of the metal cylinder guaranteed particularly reliable, wherein grooves and / or caused by the outer shell of the expanding core Roundness is reliably avoided.
  • This is a postprocessing of the Metal cylinder after the injection molding process is not required, which makes the Manufacturing effort for the housing of the throttle valve assembly particularly is small.
  • the expansion core has an oval contour on, a conscious out-of-roundness can be generated on the metal cylinder, which is compensated for by the shrinkage of the plastic when it solidifies.
  • a approximately homogeneous pressure of the outer shell of the expanding core on the inner surface of the metal cylinder is compensated for by the shrinkage of the plastic when it solidifies.
  • the spreading device advantageously has an axis, a securing means and a support body, the support body being movable along the axis has an approximately rotationally symmetrical shape, along the Axis tapers and a first end region with a smaller diameter and has a second end region with a larger diameter.
  • the support body is removed the interior of the metal cylinder by means of a movement of the support body A despreading along the axis from the interior of the metal cylinder of the outer shell of the expanding core.
  • the shape and the mobility of the support body can be the spreading device and thus the expanding core to different heights in a particularly simple manner adjust the metal cylinder.
  • the movement of itself turns out tapered support body as sufficient, the expanding core in the interior of the Spread metal cylinder against the inner surface of the metal cylinder.
  • the support body of the expansion device is advantageously approximately conical educated.
  • a cone is particularly easy to manufacture, whereby in the cone due to the inclination of the outer surface relative to the base of the cone particularly easy to different diameters and different shapes the throttle opening is adjustable.
  • the axis advantageously has a thread on which the securing means is screwed on to fix the support body.
  • the securing means for example, as one to be screwed onto a thread
  • the nut to be exerted on the outer shell of the expanding core Pressure by a certain number of turns of the nut adjust the thread in particularly fine increments.
  • the support device advantageously has, in addition to the first support body a second support body which is axially fixed to the axis, a has an approximately rotationally symmetrical shape, tapers along the axis, and a first end region with a smaller diameter and a second end region with a larger diameter in comparison on.
  • the outer shell is then spread of the expanding core against the inner surface of the metal cylinder the one smaller Diameter first end portion of the first support body in the direction on the first end region, which has a smaller diameter of the second support body moves into the interior of the metal cylinder. While of the injection molding process is the first support body on the axis fixed by means of the securing means.
  • the second support body is approximately conical.
  • a first and a second support body of the expansion device can be particularly easily different axial lengths of the outer shell of the expansion device and thus adapt to different axial lengths of the metal cylinder.
  • Furthermore can be characterized by the tapered shape of both the first and the second support body set the pressure particularly easy, the two support body Exercise together on the outer shell of the expanding core.
  • first support body and the second support body can either be have the same cone-like shape or different outer contours have their approximately conical shape.
  • the object is achieved according to the invention solved in that for sealing the housing with the metal cylinder the metal cylinder to one or both of its end regions tapered towards.
  • the throttle opening at least in the area of the throttle valve Forming metal cylinders can be particularly well through this configuration by expanding to the rest of the plastic using the injection molding process Adapt the formed housing wall to the throttle opening. This is especially true then when a shrinkage of the plastic in the end areas of the metal cylinder is provided. As a result, there is almost a throttle opening smooth transition from the metal cylinder to the plastic of the housing guaranteed.
  • a particularly smooth surface with almost no unevenness ensures a special when operating the throttle valve assembly vortex-free flow of that passing through the throttle opening Medium, creating a particularly high flow rate of the medium can be achieved.
  • a particularly high flow rate of the one passing through the throttle opening during operation of the throttle valve connector Medium in turn ensures particularly fine adjustability of the mass flow passing through the throttle opening.
  • the metal cylinder advantageously faces from its outer lateral surface radially protruding projections, which are advantageously for bearings of the throttle valve shaft are provided.
  • the metal cylinder is a particularly advantageous addition to the throttle valve assembly advantageously made of aluminum.
  • the housing of the Throttle body has a particularly low weight.
  • the housing of the throttle body is integral with the drive housing of the throttle valve assembly.
  • the construction required for the throttle valve assembly has a structural shape and installation effort to a particularly low level.
  • the advantages achieved with the invention are in particular that the Lightweight construction of the housing with a particularly high dimensional stability of the Housing is connected.
  • Deformation of the metal cylinder reliably avoided by the expanding core.
  • the expanding core is first despread before it comes out of the Interior of the metal cylinder is removed.
  • This manufacturing process also guarantees a particularly reliable inexpensive and associated with particularly little technical effort
  • Manufacture of a housing for a throttle valve assembly A throttle body with a metal cylinder tapering towards its end areas also has a particularly smooth surface of the throttle opening, whereby a particularly swirl-free flow through the throttle opening passing medium is guaranteed particularly reliably.
  • the throttle valve connector 10 according to FIG. 1 is used for one, not shown Consumers, for example an injection device, too Motor vehicle, not shown, an air or a fuel-air mixture to supply, which by means of the throttle valve connector 10 to the Fresh gas quantity to be supplied to consumers is controllable.
  • the Throttle body 10 on a housing 12, which is mainly made of plastic 14 has been manufactured and manufactured by injection molding.
  • the housing 12 has a throttle opening 16, through which the not shown Consumer air or a fuel-air mixture can be supplied.
  • a throttle valve 20 is arranged for setting the volume of fresh gas to be supplied.
  • One turn of the throttle valve shaft 18 simultaneously causes a pivoting on the throttle valve shaft 18 arranged throttle valve 20, whereby the cross section of the Throttle opening 16 is enlarged or reduced.
  • the cross section of the throttle opening 16 through the Throttle valve 20 regulates the throughput of the air or Fuel-air mixture through the throttle opening 16 of the throttle valve body 10th
  • the throttle valve shaft 18 can with a rope pulley, not shown be connected, in turn via a Bowden cable with an adjusting device is connected for a performance request.
  • the adjustment device can be designed as an accelerator pedal of a motor vehicle, so that a Actuation of this setting device by the driver of the motor vehicle Throttle valve 20 from a minimal opening position, particularly one Closed position, up to a position of maximum opening, especially one Open position, can be brought to thereby the performance of the Control motor vehicle.
  • the throttle valve shaft 18 of the throttle valve connector 10 shown in FIG. 1 is either in one section of an actuator and otherwise adjustable via the accelerator pedal or the throttle valve 20 can be adjusted by an actuator over the entire adjustment range.
  • e-gas or drive-by-wire systems become mechanical Power control, for example depressing an accelerator pedal, into an electric one Signal implemented. This signal is in turn sent to a control unit supplied, which generates a control signal for the actuator.
  • the throttle valve assembly 10 has a drive housing 22 and a gear housing 24 on.
  • the drive housing 22 and the transmission housing 24 are made in one piece with the housing 12 of the throttle valve connector 10, but they can also be a separate one-piece assembly form, or each be carried out in one piece.
  • an electric motor designed as an actuator is arranged in the drive housing 22 in the drive housing 22, an electric motor designed as an actuator is arranged in the drive housing 22 in the drive housing 22, or Either the drive housing 22 and the gear housing 24 are of a cover 26 closable.
  • the electric motor moves via one arranged in the gear housing 24 Reduction gear the throttle valve shaft 18.
  • the electric motor swivels that is, the throttle valve shaft 18 via the reduction gear.
  • the electric motor and the reduction gear are not in the drawing shown.
  • the electric motor is controlled by a control unit, which is also not shown in the drawing.
  • the control unit transmits the electric motor a signal by means of which the electric motor a certain Position of the throttle valve shaft 18 brings about via the reduction gear.
  • the actual position of the throttle valve shaft 18 can be determined by a corresponding sensor can be detected.
  • A is particularly suitable for this Potentiometer, where the wiper of the potentiometer with the throttle valve shaft 18 is connected. This sensor is also not shown in the drawing.
  • the throttle valve assembly 10 comprises a metal cylinder 28, which is made of aluminum 30 and in the plastic 14 in the area the throttle opening 16 has been injected during the injection molding process is.
  • the simplest form of the metal cylinder 28 is a piece of pipe, the bushings 32 for the throttle valve shaft 18.
  • the inner surface 33 of the Metal cylinder 28 is smooth.
  • the inner surface 33 of the metal cylinder 28 can also be worked in a contoured manner, so that predetermined characteristics for the volume flow through the throttle opening 16 depending on the Position of the throttle valve 20 are guaranteed.
  • the metal cylinder 28 has in the area of the two bushings 32 each have an extension 34. These two extensions 34 are for this provided to accommodate bearings 36 for the throttle valve shaft 18. hereby the housing 12 of the throttle valve assembly 10 proves to be special Easy to install, since after creating the housing 12, the bearings 36 only are to be inserted into the projections provided for this purpose.
  • the throttle valve shaft 18 ends on one side - according to FIG. 1 on the left side - in a room 38, in which, for example, so-called return springs and / or emergency springs can be accommodated.
  • the return springs and / or emergency running springs cause a preload of the throttle valve shaft 18 in the closing direction so that the electric motor counteracts the force of the return springs and / or emergency springs.
  • a so-called emergency running spring causes that in the event of a failure of the electric motor, the throttle valve 20 into a Defined position is brought, which is usually above the idle speed lies.
  • the throttle valve shaft 18 can also be used the space 38 out of the housing 12 of the throttle valve connector 10 protrude.
  • the housing 12 of the throttle valve connector 10 faces in the direction of the cover 26 has a circumferential flattened area 40, which has a circumferential web 42 of the cover 26 corresponds. Ensure the flat 40 and the web 42 a defined position of the cover 26 on the housing 12. The two mutually facing surfaces of the flat 40 and the web 42 after placing the cover 26 on the housing 12 using a laser beam fused together, creating an almost undetachable connection arises.
  • FIG. 2 shows a first embodiment of the throttle valve connector 10 according to FIG Figure 1 schematically in longitudinal section.
  • 2 is the metal cylinder 28 designed as a simple hollow cylinder and made of aluminum 30.
  • the outer circumference of the metal cylinder 28 and at least part of its end faces are surrounded by the plastic 14 of the housing 12.
  • the inside facing inner surface 33 of the metal cylinder 28 is designed as a smooth surface.
  • the throttle valve 20 is in the area of the metal cylinder 28 by means of the Throttle valve shaft 18 is pivotally mounted in the housing 12.
  • the drive housing 22 is integral with the housing 12 of the throttle valve assembly 10 executed.
  • FIG. 3 shows a second embodiment of the throttle valve connector 10 according to FIG Figure 1 schematically in longitudinal section.
  • 3 is the metal cylinder 28 made of aluminum 30 and formed as a hollow cylinder, which is too tapered its end portions 46.
  • the metal cylinder 28 can be moved according to the Production of the housing 12 spread and pressed against the plastic become.
  • the metal cylinder 28 is sealed against the plastic 14, with a particularly smooth transition between the Metal cylinder 28 and the plastic 14 of the housing 12 is achieved.
  • a special one stepless transition between the metal cylinder 28 and the plastic 14 of the housing 12 ensures operation of the throttle body 10 a particularly swirl-free flow through the throttle opening 16 passing medium.
  • a particularly swirl-free flow of the one passing through the throttle opening 16 of the throttle valve connector 10 Medium in turn ensures particularly fine adjustability of the volume flow passing through the throttle opening 16 by means of the throttle valve 20.
  • the drive housing 22 is in one piece with the housing 12 of the throttle valve body 10.
  • the inner surface 33 of the metal cylinder 28 is also smooth in this embodiment executed, alternatively, however, the inner surface 33 of the metal cylinder 28 also have contours to a certain throughput characteristic of the passing through the throttle opening 16 of the throttle valve connector 10 To ensure medium.
  • the housing 12 of the throttle valve assembly 10 is injection molded made of plastic 14.
  • the metal cylinder 28 is in an injection mold placed and partially overmolded with plastic 14.
  • To manufacture the housing 12 has a particularly high dimensional stability of the metal cylinder 28 will ensure during the injection molding process of the metal cylinder 28 is supported with an expanding core 50 according to FIG. 4.
  • the expanding core 50 according to FIG. 4 is in a metal cylinder 28 according to FIG. 2 used. Alternatively, however, the expanding core according to FIG. 4 can also be in one Metal cylinder 28 according to Figure 3 can be used.
  • the bushings 32 for the throttle valve shaft 18 and the extensions 34 for the bearings 36 of the throttle valve shaft 18 visible.
  • the expanding core 50 has an approximately annular outer jacket 54, which is formed from individual partial ring pieces 56.
  • the partial ring pieces 56 of the Outer jacket 54 are against the inner surface by means of a spreading device 58 33 of the metal cylinder 28 expandable.
  • the outer shell 54 of the expanding core 50 has approximately the shape of a thick-walled hollow cylinder.
  • the expanding core 50 can also have an outer jacket 54 with a have an oval contour. This can cause the metal cylinder 28 by the one exerted on the metal cylinder 28 during the injection molding process A deliberate out-of-roundness created by a pressure Shrinkage of the plastic 14 when cooling and / or solidifying again is compensated.
  • An oval contour of the outer shell 54 of the expanding core 50 is not shown in Figure 4.
  • the spreading device 58 has an axis 60, which is partially threaded 62 is provided. Alternatively, the axis 60 can also be used in its entirety Extension area have a thread 62. In the area of the thread 62, a first support body 64 is arranged on the axis 60, which by means of a locking means 66 designed as a mechanical nut on the Axis 60 can be secured.
  • the axis 60 faces the first support body 64 facing away from a second support body 68, the rotationally fixed to the axis 60 is connected.
  • Both the first support body 64 and the second Support bodies 68 have an approximately rotationally symmetrical shape, which tapers along axis 60.
  • the first support body 64 and the second Support bodies 68 have the same approximately conical shape. alternative However, the first support body 64 and the second support body 68 can also have different outer contours.
  • the expanding core 50 Before the injection molding process provided for manufacturing the housing 12 the expanding core 50 is inserted into the interior 70 of the metal cylinder 28.
  • the expansion core 50 does not cover the entire inner surface 33 of the metal cylinder 28. Alternatively, this can also be the case.
  • Securing means 66 and the first support body 64 detached from the axis 60 or shifted at least in the end region of the axis 60. So then the Expanding core 50 inserted into the interior 70 of the metal cylinder 28 until he occupies a certain position.
  • the first end region which has a smaller diameter, moves 72 of the first support body 64 toward the second support body 68 the second end region, which has a larger diameter in comparison 74 of the first support body 64 touches the securing means designed as a nut 66.
  • the first, having a smaller diameter End region 72 is the first with a smaller diameter End region 76 of the second support body 68 facing and one in comparison second end region 78 of the facing away from the second support body 68.
  • the first support body 64 and the second Support bodies 68 are thus in the partial ring pieces 56 of the outer casing 54 arranged that both the larger diameter second End region 74 of the first support body 64 and the larger diameter having second end region 78 of the second support body 68 in each case protrude beyond the partial ring pieces 56 of the outer casing 54.
  • first support body 64 and of the second support body 68 spread with increasing approach of the the first support body 64 to the second support body 68, the partial ring pieces 56 of the Outer jacket 54 of the expanding core 50 against the inner surface 33 of the metal cylinder 28. Both the first support body 64 and the latter move second support body 68 in the interior 70 of the metal cylinder 28.
  • the second a larger diameter end portion 74 of the first support body 64 and the second end portion having a larger diameter 78 of the second support body 68 are dimensioned such that both the first support body 64 and the second support body 68 do not go inside of the outer shell 54 can penetrate.
  • the securing means 66 is hereby twisted until the outer jacket 54 of the expanding core 50 by means of Spreading device 58 firmly spread against the inner surface 33 of the metal cylinder 28 is.
  • the expanding core supports 50 the metal cylinder 28 against the liquid plastic 14th exerted pressure on the metal cylinder 28.
  • the first support body 64 secured on the axis 60. Is indirect by securing the first Support body 64 on the axis 60 and the second support body 68 in the interior 70 of the metal cylinder 28 fixed.
  • the one exerted by the expanding core 50 Back pressure on the metal cylinder 28 ensures particularly reliable a dimensional stability of the metal cylinder 28 during the injection molding process.
  • the securing means designed as a nut becomes 66 and thus the first support body 64 and the second support body 68 solved.
  • both the first support body 64 and the second support body 68 moves from the interior 70 of the metal cylinder 28.
  • This movement is due to the cone-like shape of the first support body 64 and the second support body 68 of the outer jacket 54 of the expanding core 50 despread.
  • a despreading of the spreading device 58 causes one Reduction of the outer circumference 80 of the outer shell 54 of the expanding core 50, whereby the outer jacket 54 can be removed from the housing 12.
  • the expansion core 50 can thereby due to the despreading of the expansion core 50 by means of the spreading device 58 without grooves and / or roundness in the metal cylinder 28 to be left behind are removed from the metal cylinder 28.
  • the one to be used in the manufacture of the housing 12 in the metal cylinder 28 Spreading core 50 causes a particular in the manufacture of the housing 12 high dimensional stability of the metal cylinder 28.
  • the expansion core 50 is also when the housing 12 is removed from the housing 12 by despreading remove so that there are no scoring and / or roundness in the housing 12 leaves.
  • the metal cylinder 28 made of aluminum 30 enables a lightweight design of the housing 12 of the throttle valve body 10 connected with a particularly high dimensional stability of the housing 12 during operation of the throttle valve body 10.
  • a housing 12 made of plastic 14 for one Throttle body 10 is more economical to manufacture, because the one Rework required for metal housings. Also one can Adapt the plastic housing more easily to predefinable shapes.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Lift Valve (AREA)

Claims (13)

  1. Procédé de fabrication d'un boítier (12) pour une tubulure de volet de réglage (10) qui présente une ouverture de réglage (16) pour un volet de réglage (20), dans lequel le boítier (12) est fabriqué en matière plastique (14) selon le procédé de moulage par injection et selon lequel, pendant le procédé de moulage par injection, un cylindre métallique (28) formant l'ouverture de réglage (16) au moins dans la région du volet de réglage (20) est surmoulé partiellement avec de la matière plastique (14), caractérisé en ce qu'avant l'opération de moulage par injection, on dilate un noyau expansible (50) pour l'appliquer contre la surface interne (33) du cylindre métallique (28), que, pendant l'opération de moulage par injection, la surface interne (33) du cylindre métallique (28) est au moins partiellement soutenue par le noyau expansible (50) et qu'après l'opération de moulage par injection, on réduit le périmètre extérieur (80) du noyau expansible (50) pour extraire le noyau expansible (50) de l'espace intérieur (70) du cylindre métallique (28).
  2. Procédé de fabrication d'un boítier (12) pour une tubulure de volet de réglage (10) selon la revendication 1, caractérisé en ce que le noyau expansible (50) présente un dispositif d'expansion (58) et une paroi extérieure (54) qui entoure au moins partiellement le dispositif d'expansion (58), cependant qu'avant l'opération de moulage par injection, on dilate la paroi extérieure (54) du noyau expansible (50) radialement au moyen du dispositif d'expansion (58) pour l'appliquer contre la surface interne (33) du cylindre métallique (28) et que, pendant l'opération de moulage par injection, la paroi extérieure (54) du noyau expansible (50) est dilatée radialement et appliquée contre la surface interne (33) du cylindre métallique (28) au moyen du dispositif d'expansion (58) et qu'après l'opération de moulage par injection, pour extraire le noyau expansible (50) de l'espace intérieur (70) du cylindre métallique (28), on produit au moyen du dispositif d'expansion (58) une contraction radiale de la paroi extérieure (54) du noyau expansible (50).
  3. Procédé de fabrication d'un boítier (12) pour une tubulure de volet de réglage (10) selon la revendication 2, caractérisé en ce que, pendant l'opération de moulage par injection, la paroi extérieure (54) du noyau expansible (50) est pressée au moins partiellement fae contre face contre la surface interne (33) du cylindre métallique (28) par le dispositif d'expansion (58) du noyau expansible (50).
  4. Procédé de fabrication d'un boítier (12) pour une tubulure de volet de réglage (10) selon la revendication 2 ou 3, caractérisé en ce que le dispositif d'expansion (58) présente un axe (60), un moyen de blocage (66) ainsi qu'un corps d'appui (64), le corps d'appui (64) pouvant se déplacer le long de l'axe (60), présentant une forme à peu près de révolution, se rétrécissant sur la longueur de l'axe (60) et possédant une première région terminale (72) présentant un plus petit diamètre et une deuxième région terminale (74) présentant un diamètre comparativement plus grand, et en ce que avant l'opération de moulage par injection, pour dilater la paroi extérieure (54) du noyau expansible (50) et l'appliquer contre la surface interne (33) du cylindre métallique (28), on fait avancer la première région terminale (72) du corps d'appui (64), présentant un plus petit diamètre, le long de l'axe (60), en l'engageant dans l'espace intérieur (70) du cylindre métallique (28), pendant l'opération de moulage par injection, le corps d'appui (54) est immobilisé sur l'axe (60) à l'aide du moyen de blocage (66) et, après l'opération de moulage par injection, pour extraire le noyau expansible (50) de l'espace intérieur (70) du cylindre métallique à l'aide d'un déplacement du corps d'appui (64) le long de l'axe (60) qui l'évacue de l'espace intérieur (70) du cylindre métallique (28), on produit une contraction de la paroi extérieure (54) du noyau expansible (50).
  5. Procédé de fabrication d'un boítier (12) pour une tubulure de volet de réglage (10) selon la revendication 4, caractérisé en ce que le corps d'appui (64) est avantageusement de forme à peu près conique.
  6. Procédé de fabrication d'un boítier (12) pour une tubulure de volet de réglage (10) selon la revendication 4 ou 5, caractérisé en ce que l'axe (60) présente un filetage (62) et en ce que, pour immobiliser le premier corps d'appui (64) sur l'axe (60), on visse le moyen de blocage (66) sur ce filetage (62).
  7. Procédé de fabrication d'un boítier (12) pour une tubulure de volet de réglage (10) selon l'une des revendications 4 à 6, caractérisé en ce que le dispositif d'expansion (58) présente, en dehors du premier corps d'appui (64), un deuxième corps d'appui (68) qui est assemblé à l'axe (60) par une liaison rigide dans la direction axiale, présente une forme à peu près de révolution, se rétrécit sur la longueur de l'axe (60) et possède une première région terminale (76) présentant un plus petit diamètre et une région terminale (78) présentant un diamètre comparativement plus grand, et en ce que, avant l'opération de moulage par injection, pour dilater la paroi extérieure (54) du noyau expansible (50) en l'appliquant contre la surface interne (33) du cylindre métallique (28), on fait avancer la première région terminale (72) du premier corps d'appui (64), qui présente un plus petit diamètre, le long de l'axe (60) en direction de la première région terminale (76) du deuxième corps d'appui (64), qui présente un plus petit diamètre, en l'engageant dans l'espace intérieur (70) du cylindre métallique (28), pendant l'opération de moulage par injection, le premier corps d'appui (64) est immobilisé sur l'axe (60) à l'aide du moyen de blocage (66) et, après l'opération de moulage par injection, pour extraire le noyau expansible (50) de l'espace intérieur (70) du cylindre métallique (28) à l'aide d'un déplacement de la première région terminale (72) du premier corps d'appui (64), présentant un plus petit diamètre, le long de l'axe (60), dans le sens qui l'éloigne de la première région terminale (76) du deuxième corps d'appui (64) présentant un plus petit diamètre, et qui l'évacue de l'espace intérieur (70) du cylindre métallique (28), on effectue une contraction de la paroi extérieure (54) du noyau expansible (50).
  8. Procédé de fabrication d'un boítier (12) pour une tubulure de volet de réglage (10) selon la revendication 7, caractérisé en ce que le deuxième corps d'appui (68) est de forme à peu près conique.
  9. Tubulure de volet de réglage (10) comprenant un boítier (12) qui présente une ouverture de réglage (16) pour un volet de réglage (20), dans laquelle le boítier (12) fabriqué en matière plastique (14) selon le procédé de moulage par injection présente un cylindre métallique (28) partiellement entouré de matière plastique (14) et qui forme l'ouverture de réglage (16), au moins dans la région du volet de réglage (20), caractérisé en ce que le cylindre métallique (28) s'amincit en direction d'une (46) de ses régions terminales ou de ses deux régions terminales (46).
  10. Tubulure de volet de réglage (10) selon la revendication 9, caractérisée en ce que le cylindre métallique (28) présente des appendices (34) qui font saillie radialement sur sa surface de paroi extérieure.
  11. Tubulure de volet de réglage (10) selon la revendication 10, caractérisée en ce que les appendices (34) sont prévus pour recevoir les paliers (36) de l'arbre de volet de réglage (18).
  12. Tubulure de volet de réglage (10) selon une des revendications 9 à 11, caractérisée en ce que le cylindre métallique (28) est fabriqué en aluminium.
  13. Tubulure de volet de réglage (10) selon une des revendications 9 à 12, caractérisée en ce que le boítier (12) de la tubulure de volet de réglage (10) est réalisée en une seule pièce avec la boítier d'entraínement (22) de la tubulure de volet de réglage (10).
EP20010107670 2000-05-12 2001-03-28 Procédé pour fabriquer un corps de papillon et corps de papillon ainsi obtenu Expired - Lifetime EP1154138B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10023348A DE10023348A1 (de) 2000-05-12 2000-05-12 Verfahren zur Herstellung eines Gehäuses für einen Drosselklappenstutzen sowie Drosselklappenstutzen
DE10023348 2000-05-12

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EP1154138A2 EP1154138A2 (fr) 2001-11-14
EP1154138A3 EP1154138A3 (fr) 2002-04-17
EP1154138B1 true EP1154138B1 (fr) 2003-05-21

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EP (1) EP1154138B1 (fr)
KR (1) KR100753254B1 (fr)
BR (1) BR0101862A (fr)
DE (2) DE10023348A1 (fr)

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Publication number Publication date
KR100753254B1 (ko) 2007-08-29
US20020023347A1 (en) 2002-02-28
BR0101862A (pt) 2001-12-18
KR20010104284A (ko) 2001-11-24
EP1154138A3 (fr) 2002-04-17
DE10023348A1 (de) 2001-12-13
DE50100249D1 (de) 2003-06-26
EP1154138A2 (fr) 2001-11-14
US6649111B2 (en) 2003-11-18

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