EP4196343A1 - Presse à poudre permettant de produire des articles pressés - Google Patents

Presse à poudre permettant de produire des articles pressés

Info

Publication number
EP4196343A1
EP4196343A1 EP21752033.7A EP21752033A EP4196343A1 EP 4196343 A1 EP4196343 A1 EP 4196343A1 EP 21752033 A EP21752033 A EP 21752033A EP 4196343 A1 EP4196343 A1 EP 4196343A1
Authority
EP
European Patent Office
Prior art keywords
counterpart
connecting piece
balls
powder press
press according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21752033.7A
Other languages
German (de)
English (en)
Other versions
EP4196343B1 (fr
Inventor
W. Dietmar Kramer
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4196343A1 publication Critical patent/EP4196343A1/fr
Application granted granted Critical
Publication of EP4196343B1 publication Critical patent/EP4196343B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/065—Press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026—Mounting of dies, platens or press rams

Definitions

  • the invention relates to a powder press for the production of compacts, with a chuck housing with preferably several rams that can be moved in this housing and partially delimit a cavity of a die, which can each be coupled by a connecting piece to a counterpart of a pressing device for pressing the same.
  • a generic chuck housing a powder press is in
  • each stamp is formed with an adjustable positioning means in the form of a wedge arrangement placed transversely to the displacement direction of the stamp, which is provided with a stop for the stamp or for the connecting piece coupled to it.
  • This ensures very stable positioning of the stamps, even with very high pressing forces.
  • the pressing position of the punches can be adjusted easily and very accurately.
  • the respective connecting piece of the stamp is designed as a T-shaped sliding block, which must be inserted or removed from above or below into or out of the counterpart of the pressing device for coupling and uncoupling the same. In powder presses, however, the space above and below the chuck housing is limited and therefore the stamps cannot usually be easily coupled or decoupled.
  • the invention is based on the object of remedying this disadvantage and designing a powder press in such a way that simple and reliable coupling and decoupling of the stamps with the pressing devices assigned to them is made possible.
  • the respective connecting piece and the counter-piece interacting with it are designed in such a way that the connecting piece can be coupled and decoupled frontally in the adjustment direction of the stamp with the corresponding counter-piece of the pressing device.
  • the invention also provides that the counterpart of the pressing device or the connecting piece of the stamp are provided with inwardly or outwardly adjustable clamping means for fixing or releasing the connecting piece in or from the counterpart. In this way, the clamping means can be actuated from above or from below at any time, conveniently and without any problems.
  • the clamping means are preferably balls mounted in the counterpart, which can be engaged or disengaged in lateral recesses of the connecting piece during coupling or uncoupling.
  • the invention also provides that the counterpart of the pressing device is assigned two pairs of balls arranged to the left and right of the stamp, each pair of balls being held in a cage provided in the counterpart with a cover plate that can be removed from the outside is.
  • the higher number of symmetrically arranged balls creates an evenly stronger clamping effect.
  • the balls are always easily accessible from the outside by removing the cover plate of the cage.
  • the lateral recesses of the connecting piece are expediently designed as depressions which receive the balls individually.
  • the lateral recesses of the connecting piece it is alternatively possible for the lateral recesses of the connecting piece to extend over the entire height of the
  • the invention also provides that the balls can be adjusted by means of adjusting means, for example screws, which can be actuated from above or below transversely to the axial direction of the stamp in the counterpart of the pressing device, with clamping cones acting on the balls.
  • adjusting means for example screws, which can be actuated from above or below transversely to the axial direction of the stamp in the counterpart of the pressing device, with clamping cones acting on the balls.
  • the adjusting screws can interact with nuts which are provided with clamping cones that are mirror images of those of the adjusting screws. In this way it is possible to actuate the two balls of each pair of balls simultaneously with one adjusting screw each.
  • the balls in the counterpart are mounted in the axial direction of the punches in a plane in front of the center plane of the adjusting screws, so that the contact line of the clamping cone with the clamping balls is slightly offset in front of the center plane of the adjusting screws.
  • the invention also provides that the connecting piece of the stamp is designed as a separate component which is fixed to the stamp on the front side.
  • FIG. 1 shows a top view of a powder press according to the invention with a chuck housing and a pressing device coupled thereto;
  • FIG. 2 shows a side view of the powder press according to FIG. 1;
  • FIG 5 shows a cross section through the connecting piece in the coupled state of the coupling device.
  • the powder press shown in Fig. 1 and Fig. 2 is used to produce compacts and has a chuck housing 1 with punches 5, through which metal powder or the like can be filled into a formed mold cavity of a die, which is then then pressed at high pressure.
  • the chuck housing 1 can be fastened to a base plate 2 and includes guide blocks 3, 4 and four stamps 5 provided for transverse pressing, which are provided with lateral guide elements (not shown) in
  • Slideways of the guide blocks 3, 4 can be pushed in and out radially and form part of the die with the cavity for the production of the compact in the center, for which purpose they are provided with corresponding recesses on the front as a negative form of the compact.
  • Each of the provided for the transverse pressing stamp 5 is associated with a pressing device 6, to which the stamp 5 by a coupling device 7 consisting of a connecting piece 8 of the stamp and a counterpart 9 of the pressing device 6 that interacts with it.
  • These pressing devices acting on the stamps are each equipped with a drive element, as is explained in more detail in the document WO 2016/139151 A1 mentioned at the outset.
  • the connecting piece 8 and the counterpart 9 of the coupling device 7 are designed in such a way that the connecting piece 8 can be inserted into the corresponding counterpart 9 of the pressing device 6 frontally or on the front side in the adjustment direction of the punch 5 or can be pulled out of this and in this way the coupling and uncoupling process can be carried out directly when moving the stamp 5 in the chuck housing 1.
  • the coupling device 7 with the connecting piece 8 and the counterpart 9 has clamping means in the form of balls 10, which can be used to fix or release the connecting piece 8 in or from the counterpart 9 with adjusting screws 11 mounted transversely to the axial direction of the punch from above or from above can be operated from below.
  • the balls 10 are guided in corresponding openings in the cage wall 14 in such a way that they protrude inward from the cage 12 for coupling and are accommodated in lateral trough-shaped recesses. gene 15 of the connector 8 can be locked. They are held in this cage in such a way that they do not fall out inwards.
  • the openings of the cage wall 14 are provided with slightly protruding knurls on the inside.
  • the recesses 15 in each pair of balls it is also possible for the recesses 15 in each pair of balls to be designed to extend over the entire height of the cage 12 .
  • the adjusting screws 11 have an actuating head 17 and a clamping cone 18 which, when the adjusting screws are actuated, interacts with a mirror-inverted clamping cone 19 of a nut 20 in such a way that, for each pair of balls, the clamping cones 18, 19 simultaneously press the balls 10 against the connecting piece 8 or .can solve from him.
  • the clamping cones 18, 19 are more or less shifted with or along the adjusting screws 11 so that their distance from the recesses 15 of the connecting piece 8 varies accordingly, with a tangentially engaging dowel pin 21 of the counterpart 9 securing the nuts 20 against rotation.
  • the latter are held on the adjusting screws 11 by clamping rings 22. Sealing O-rings 23 are provided at the other end of the screw, which prevent metal powder from penetrating the counterpart 9 .
  • the lower clamping cone 19 can have a shoulder which ensures that the clamping effect is released if the clamping means are seized.
  • the centers of the balls 10 in the counterpart 9 are somewhat spaced in the adjustment or axial direction of the punches 5 in a plane 25 parallel in front of the central plane 24 of the adjustment screws 11, so that the contact line of the clamping cone 18, 19 with the balls 10 slightly in front of the center level 24 of the adjusting screws 11 is offset, so that the balls 10 are clamped between the adjusting screws 11, the front wall of the cage 12 and the connecting piece 8 during the coupling process.
  • the clamping means 10 are arranged with the adjusting screws 11 in the counterpart 9 of the pressing device.
  • clamping means and adjusting screws in the connecting piece 8 of the stamps in a kinematic reversal.
  • the coupling device 7 can be constructed in such a way that it can be provided with only one or more than two balls per side or with differently designed clamping means, such as rollers or toothed segments, with a comparable mode of operation.
  • the adjusting screws could also be arranged in such a way that they protrude laterally and can be operated accordingly from the side. You would then press the clamping means into the recesses from the side in an analogous manner.
  • the connecting piece 8 is produced as a separate component which is fixed to the stamps 5 by a screw connection 26 .
  • This has the advantage that the stamps can easily be adapted to the respective construction of the coupling device 7 and that if the coupling is damaged, only the connecting piece and not the entire stamp has to be replaced.
  • connecting piece 8 is formed as an integral part of the stamp.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

L'invention concerne une presse à poudre permettant de produire des articles pressés, la presse comprenant une enveloppe d'alimentation (1) comportant de préférence une pluralité de poinçons (5) pouvant être déplacés dans l'enveloppe d'alimentation et délimitant au moins partiellement une cavité d'une matrice. Chaque poinçon peut être accouplé à une pièce d'accouplement (9) d'un dispositif de pressage (6) permettant le pressage, au moyen d'une pièce de liaison respective (8). La pièce de liaison respective (8) et la pièce d'accouplement (9) coopérant avec ladite pièce de liaison sont conçues de sorte que la pièce de liaison (8) peut être accouplée à la pièce d'accouplement (9) correspondante du dispositif de pressage, ou désaccouplée de cette dernière, frontalement dans la direction de déplacement du poinçon, ce qui permet un accouplement simple et fiable du poinçon aux dispositifs de presse associés et un désaccouplement simple et fiable à partir de ces derniers.
EP21752033.7A 2020-08-11 2021-07-29 Presse à poudre permettant de produire des articles pressés Active EP4196343B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH001003/2020A CH717734B1 (de) 2020-08-11 2020-08-11 Pulverpresse zur Herstellung von Presslingen.
PCT/EP2021/071268 WO2022033883A1 (fr) 2020-08-11 2021-07-29 Presse à poudre permettant de produire des articles pressés

Publications (2)

Publication Number Publication Date
EP4196343A1 true EP4196343A1 (fr) 2023-06-21
EP4196343B1 EP4196343B1 (fr) 2024-09-04

Family

ID=77265075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21752033.7A Active EP4196343B1 (fr) 2020-08-11 2021-07-29 Presse à poudre permettant de produire des articles pressés

Country Status (4)

Country Link
EP (1) EP4196343B1 (fr)
CH (1) CH717734B1 (fr)
ES (1) ES2994952T3 (fr)
WO (1) WO2022033883A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE649851C (de) * 1934-06-12 1937-09-03 Ford Motor Co Befestigungseinrichtung fuer Stanzstempel im Werkzeughalter
US4726270A (en) * 1987-01-05 1988-02-23 Lucas Rose E Stamping system
DE3709299A1 (de) * 1987-03-20 1988-09-29 Index Werke Kg Hahn & Tessky Werkzeugwechseleinrichtung fuer eine werkzeugmaschine
DE502008002806D1 (de) * 2008-03-17 2011-04-21 Osterwalder Ag Pulverpresse zur Herstellung eines Presslings aus Metallpulver
CH710828B1 (de) 2015-03-05 2019-06-28 Dietmar W Kramer Dr Sc Techn Eth Phd Pulverpresse sowie ein Futtergehäuse mit vorzugsweise mehreren für ein Querpressen verschiebbaren Stempeln.

Also Published As

Publication number Publication date
ES2994952T3 (en) 2025-02-04
WO2022033883A1 (fr) 2022-02-17
EP4196343B1 (fr) 2024-09-04
CH717734B1 (de) 2024-02-29
CH717734A2 (de) 2022-02-15

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