EP0826450B1 - Procédé de calibration d'un évidement - Google Patents

Procédé de calibration d'un évidement Download PDF

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Publication number
EP0826450B1
EP0826450B1 EP97114049A EP97114049A EP0826450B1 EP 0826450 B1 EP0826450 B1 EP 0826450B1 EP 97114049 A EP97114049 A EP 97114049A EP 97114049 A EP97114049 A EP 97114049A EP 0826450 B1 EP0826450 B1 EP 0826450B1
Authority
EP
European Patent Office
Prior art keywords
calibration
die
shock absorber
sintered component
recess
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
EP97114049A
Other languages
German (de)
English (en)
Other versions
EP0826450A1 (fr
Inventor
Ewald May
Antonio Casellas
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.)
GKN Sinter Metals GmbH
Original Assignee
GKN Sinter Metals 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 GKN Sinter Metals GmbH filed Critical GKN Sinter Metals GmbH
Publication of EP0826450A1 publication Critical patent/EP0826450A1/fr
Application granted granted Critical
Publication of EP0826450B1 publication Critical patent/EP0826450B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • B22F3/164—Partial deformation or calibration
    • B22F2003/166—Surface calibration, blasting, burnishing, sizing, coining
    • 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
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y10T29/49252—Multi-element piston making
    • 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
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y10T29/49265—Ring groove forming or finishing
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49861—Sizing mating parts during final positional association
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49945—Assembling or joining by driven force fit

Definitions

  • the invention relates to a method for calibrating a essentially disc-shaped sintered component, the two opposite large areas and one the two Has peripheral surfaces connecting large areas, wherein in the peripheral surface, which is a continuous and / or polygonal contour has at least one forming an undercut Recess is arranged.
  • the goal of this manufacturing technique is to make molded articles metallic materials that are manufactured in large quantities be avoided, if possible, at least under Minimization of complex machining processes. Procedures used to do this are at room or Pressing processes carried out at elevated temperature, die casting processes, Investment casting and powder metallurgical Sintering process.
  • powders are in appropriately shaped dies with stamps that profiled can be, optionally using Thorns, if necessary with the application of temperature, to shaped bodies pressed and then sintered (S-2.B. FR-A-1 490 434). Is problematic with this manufacturing process, however, the formation of undercuts on and in the moldings produced. In these cases, combinations of powder metallurgy are often used Process and machining shaping back.
  • shock absorber pistons Such a combination of methods is used in the manufacture disc-shaped sintered components, in particular shock absorber pistons, used. It was common until now, the shock absorber piston, that of at least one or more of the same or unequal parts, so that a circumferential ring groove through machining manufacturing processes was introduced. In the case of pressing the Grünlings preformed ring groove had to do this after sintering can be brought to their final dimensions by machining processes. This is time consuming and costly.
  • the invention has for its object the above to avoid disadvantages and the procedure for To simplify the manufacture of such parts.
  • the sintered component is placed in a calibration matrix and at least one upper and one lower die and at least one engaging in the recess Calibration slide is set and then a Press pressure applied to the die and thereby the Recess through at least partial deformation to the final dimension is calibrated.
  • a method has the advantage that the process step of machining or machining of a recess is avoided and thus one procedural step is saved. Thereby processing time and costs of sintered components, in particular shock absorber pistons.
  • shock absorber piston it is not necessary is a recess, for example an annular groove a shock absorber piston to be machined or reworked.
  • a shock absorber piston it is possible to calibrate the ring groove without this or deform the passage channels so that the function of the Shock absorber piston is no longer guaranteed.
  • Partial deformation of the annular groove can, for example, thereby achieved that the annular groove of the sintered shock absorber piston based on the final dimension to be achieved in your Diameter an undersize and / or their groove width an oversize having.
  • Significance is when applying the method to one Shock absorber pistons in particular the dimensional accuracy of the width of the ring groove and the accuracy of the parallelism of the ring groove flanks to each other.
  • a calibration mandrel is inserted into the hole becomes.
  • the recess preferably a hole for receiving the piston rod at one Shock absorber piston in the same process step on it Gauge block is calibrated.
  • the stamp prevents through the calibration mandrel Deformations of the axial recess due to the pressure the stamp prevents.
  • a particularly advantageous embodiment of the invention is one formed from at least two sub-elements Component provided that the sub-elements in a first joining operation are added, then into the calibration matrix be inserted, and that before applying the Pressing the sub-elements by applying a form be finally joined and then the pressure applied becomes.
  • This method proves to be advantageous in that the at least two of the same or different Sintered component composed of partial elements the first pre-operation as a unit in the calibration matrix can be inserted and thereby handling problems be avoided.
  • At least one partial element before the application of the pressing pressure is set via the calibration slide.
  • the sub-elements by applying a form at least one form stamp and / or on at least one parallel stamps are added to the form stamp.
  • the Applying a form here can especially for the final joining of the sub-elements can be used.
  • the sintered component is stretched and the to Calibrate the necessary pressure via at least one of the Form stamp and / or at least one of the form stamp parallel stamp is applied.
  • the sintered component is stretched and the to Calibrate the necessary pressure via at least one of the Form stamp and / or at least one of the form stamp parallel stamp is applied, the parallel Stamp on the outer edge area of the sintered component presses.
  • the edge area of the shock absorber piston i.e. the annular groove limiting area, presses so that by a matched Pressure distribution the ring groove is calibrated without that there are undesirable deformations in the border area between Ring groove and the rest of the disc body comes.
  • the die and the parallel stamp with the same pressure press on the component.
  • the form stamp but also with less or greater pressure than that Press parallel stamp on the component and thereby one achieve targeted local deformation.
  • Fig. 1 shows a shock absorber piston 1, which consists of a lower Shock absorber piston part 2 and an upper shock absorber piston part 3 exists.
  • a shock absorber piston 1 which consists of a lower Shock absorber piston part 2 and an upper shock absorber piston part 3 exists.
  • a cylindrical bore 4 In the middle of the shock absorber piston 1 there is a cylindrical bore 4. Also points the shock absorber piston 1 through channels 6, which him in enforce essentially in the axial direction.
  • the one on the Circumferential surface of the shock absorber piston 1 arranged annular groove 5 is due to the undercut of the shock absorber piston parts 2 and 3 formed and must be made to their final dimensions become.
  • Fig. 2 shows a three-part shock absorber piston 1, which a center sleeve 7, and a same upper 8 and lower Shock absorber piston part 9.
  • the on the peripheral surface the shock absorber piston 1 arranged annular groove 5 is by the undercut of the shock absorber piston parts 8 and 9 is formed and must also be made to measure.
  • Fig. 3 shows a two-part shock absorber piston 1, based on which is the precise final production by calibrating the Ring groove 5 in FIGS. 4.1 to 6.2 is explained below.
  • This shock absorber piston 1 consists of two different shock absorber piston parts, namely the upper shock piston part 10 and the lower shock piston part 11. Furthermore the shock absorber piston 1 through channels 6 and an annular groove 5 on its peripheral surface, the annular groove 5 mainly in shape through the lower shock piston part 11 is formed and the upper shock piston part 10 forms the lateral boundary of the annular groove 5.
  • the shock absorber piston 1 which consists of the upper 10 and lower shock absorber piston part 11 exists, can be added. This can be done manually or for example also by means of an automatic joining device be performed.
  • the pre-assembled shock absorber piston 1 is then inserted into a calibration matrix 12, which is limited by a lower die 17.
  • the lower die 17 is an upper die 18 with assigned a sleeve-like stamp 14.
  • the shock absorber piston 1 is by means of a pre-pressure of the leading Stamp 14 added to the piston shirt 15.
  • the joining the shock absorber piston 1 can also by means of the leading sleeve-like stamp 14 and / or by means of the upper Form stamp 18 are performed.
  • the upper form stamp 18, the leading, rifle-like stamp 14 and the lower one Form stamps 17 correspond to the surface of the upper one 19 and lower shock absorber piston part 16 profiled.
  • the calibration slide 20 correspond in its outer, engaging in the annular groove 5 Dimensions the desired production dimension of the ring groove.
  • the calibration allowance provided on the sintered component from approx. 1 to 10% in height due to plastic deformation reduced, so that in particular the annular groove 5 the desired Receives final dimensions.
  • the inner stamp 18 mainly delivers all other dimensions. It is of particular importance that the Ring groove width is calibrated to dimension a and the upper one 21 and lower 22 ring groove flank after calibration in parallel are to each other and the gauge block for the ring groove diameter b is reached.
  • the sintered and joined Shock absorber piston 1 slightly the groove width larger and the ring groove diameter designed slightly smaller are.
  • the calibration slide 20 By pressing on the die Shock absorber piston 1, in its annular groove 5, the calibration slide 20 intervene, the annular groove width is due to partial deformations a and the ring groove diameter b brought to the final dimension and the parallelism of the ring groove flanks 21, 22 ensures.
  • 6.1 and 6.2 show the demolding step. For this the calibration slide 20 from the calibrated ring groove 5 removed and the shock absorber piston 1 through the lower Stamp 17 ejected from the die 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Measuring Fluid Pressure (AREA)

Claims (7)

  1. Procédé pour calibrer une pièce frittée (1) globalement en forme de disque qui comporte deux grandes surfaces à l'opposé l'une de l'autre et une surface périphérique reliant les deux grandes surfaces, au moins un évidement (5) formant une contre-dépouille étant agencé dans ladite surface périphérique qui présente un contour continu et/ou polygonal, caractérisé en ce qu'on place la pièce frittée dans une matrice de calibrage (12), qu'on la coince par l'intermédiaire d'au moins une estampe de moulage supérieure (17) et une estampe de moulage inférieure (18) et d'au moins un coulisseau de calibrage (20) pénétrant dans l'évidement (5), qu'on applique ensuite une pression de moulage sur l'estampe de moulage et qu'on calibre ainsi l'évidement à sa cote finale par au moins une déformation partielle.
  2. Procédé selon la revendication 1 pour calibrer une pièce frittée globalement en forme de disque, notamment un piston d'amortisseur, qui comporte en plus de l'évidement dans la surface périphérique au moins un trou (4) traversant au moins l'une des deux grandes surfaces, caractérisé en ce qu'on introduit un mandrin de calibrage (13) dans le trou après le placement de la pièce frittée dans la matrice de calibrage (12).
  3. Procédé selon la revendication 1 ou 2 pour calibrer une pièce frittée composée d'au moins deux éléments partiels (10, 11), caractérisé en ce qu'on préassemble les éléments partiels lors d'une première opération d'assemblage, qu'on les place ensuite dans la matrice de calibrage (12), qu'on assemble définitivement les éléments partiels par l'application d'une pression préalable avant l'application de la pression de moulage et qu'on applique ensuite la pression de moulage.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que, avant l'application de la pression de moulage, on fixe au moins un élément partiel par l'intermédiaire du coulisseau de calibrage.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce qu'on assemble les éléments partiels par l'application d'une pression préalable sur au moins une estampe de moulage et/ou sur au moins une estampe parallèle à l'estampe de moulage.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce qu'on serre la pièce frittée par l'intermédiaire de l'estampe de moulage et/ou de l'estampe parallèle et qu'on applique la pression nécessaire au calibrage par l'intermédiaire d'au moins l'une des estampes de moulage et/ou d'au moins une des estampes parallèles à l'estampe de moulage.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce qu'on serre la pièce frittée par l'intermédiaire des estampes de moulage et/ou de l'estampe parallèle et qu'on applique la pression nécessaire au calibrage par l'intermédiaire d'au moins l'une des estampes de moulage et/ou d'au moins une des estampes parallèles à l'estampe de moulage, l'estampe parallèle appuyant sur la zone de bord extérieure de la pièce frittée.
EP97114049A 1996-08-30 1997-08-14 Procédé de calibration d'un évidement Expired - Lifetime EP0826450B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19635183A DE19635183A1 (de) 1996-08-30 1996-08-30 Verfahren zur Kalibrierung einer vorgeformten Ausnehmung
DE19635183 1996-08-30

Publications (2)

Publication Number Publication Date
EP0826450A1 EP0826450A1 (fr) 1998-03-04
EP0826450B1 true EP0826450B1 (fr) 2001-02-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97114049A Expired - Lifetime EP0826450B1 (fr) 1996-08-30 1997-08-14 Procédé de calibration d'un évidement

Country Status (4)

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US (1) US6101713A (fr)
EP (1) EP0826450B1 (fr)
DE (2) DE19635183A1 (fr)
ES (1) ES2155643T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010009800B3 (de) * 2010-03-01 2011-06-16 Gkn Sinter Metals Holding Gmbh Verfahren zum Hochgenauigkeitskalibrieren eines Bauteils
DE102013201962B4 (de) * 2013-02-06 2016-08-18 Schwäbische Hüttenwerke Automotive GmbH Sinterbauteil mit Verstemmwulst
AT513616B1 (de) 2013-05-28 2014-06-15 Miba Sinter Austria Gmbh Verfahren zum Verschließen einer Bohrung
DE102013015676A1 (de) * 2013-09-23 2015-03-26 Gkn Sinter Metals Holding Gmbh Verfahren zur Herstellung eines Sinterteils mit höhenpräziser Formteilhöhe sowie Teilesatz aus Sinterfügeteilen
DE102013015677A1 (de) 2013-09-23 2015-03-26 Gkn Sinter Metals Holding Gmbh Verfahren zur Herstellung eines Sinterteils mit hochgenauer radialer Präzision sowie Teilesatz mit Sinterfügeteilen
EP3263249B1 (fr) * 2016-06-30 2019-01-23 Seco Tools Ab Outil de compression
DE102019134153A1 (de) * 2019-12-12 2021-06-17 Gkn Sinter Metals Engineering Gmbh Sinterteil und Verfahren zu dessen Herstellung
CN118371582B (zh) * 2024-06-21 2024-08-20 常州市生生线缆有限公司 一种新能源电池用铝排冲压装置

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US2446621A (en) * 1943-12-03 1948-08-10 Gen Tire & Rubber Co Method of making precision antivibration mountings
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GB1145592A (en) * 1967-01-16 1969-03-19 Crestshore Engineering Ltd Template for use in measuring pipework
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DE59200597D1 (de) * 1992-02-26 1994-11-10 Ringsdorff Sinter Gmbh Mehrteiliger Stossdämpferkolben mit Fügeelementen.

Also Published As

Publication number Publication date
DE19635183A1 (de) 1998-03-05
US6101713A (en) 2000-08-15
EP0826450A1 (fr) 1998-03-04
DE59703037D1 (de) 2001-04-05
ES2155643T3 (es) 2001-05-16

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