EP1852247A2 - Presse destinée à la fabrication de comprimés en matériau poudreux - Google Patents

Presse destinée à la fabrication de comprimés en matériau poudreux Download PDF

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Publication number
EP1852247A2
EP1852247A2 EP07006498A EP07006498A EP1852247A2 EP 1852247 A2 EP1852247 A2 EP 1852247A2 EP 07006498 A EP07006498 A EP 07006498A EP 07006498 A EP07006498 A EP 07006498A EP 1852247 A2 EP1852247 A2 EP 1852247A2
Authority
EP
European Patent Office
Prior art keywords
die
press
adjustment
slide
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.)
Withdrawn
Application number
EP07006498A
Other languages
German (de)
English (en)
Other versions
EP1852247A3 (fr
Inventor
Martin Plucinski
Thomas Pannewitz
Udo Baldruschat
Carsten Jordt
Andreas Groth
Andreas Teetzen
Harald Römer
Jan Naeve
Stephan Mallon
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.)
Fette GmbH
Original Assignee
Fette 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 Fette GmbH filed Critical Fette GmbH
Publication of EP1852247A2 publication Critical patent/EP1852247A2/fr
Publication of EP1852247A3 publication Critical patent/EP1852247A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements
    • 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/007—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a plurality of pressing members working in different directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • 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
    • B22F2003/031—Press-moulding apparatus therefor with punches moving in different directions in different planes
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

  • the invention relates to a press for the production of compacts of powder material according to the preamble of patent claim 1.
  • Such presses are used e.g. to produce metal powder compacts for the subsequent sintering process, e.g. for the production of tools, such as inserts or the like.
  • the powder material is filled by means of a suitable filling device in the mold cavity of a die.
  • the die is mounted on a die plate or a die table, which in turn is arranged in a press frame.
  • adjusting drives for at least one upper and at least one lower punch are arranged, which cooperate with the mold cavity and the powder therein.
  • the axes of the adjusting drives are coaxial and vertical.
  • a common drive sees e.g. Hydraulic cylinder in front.
  • the press punches a measuring system and to control the ram in accordance with the measured positions up to an end position, optionally also as a function of time.
  • the stamp speed is a criterion in the production of the compact.
  • a compact has a tendency to expand to some extent after completion of the compression phase. There is a risk that cracks or the like may occur in the compact if such expansion takes place too rapidly. It is therefore already known to let act on the compact after pressing a certain load and remove this load only after some time. Finally, it is also known to specify the amount of the ballast material-dependent and also the reduction of the ballast with the help of the already existing control device.
  • Removal of a compact from the mold cavity in the die is typically accomplished by relative movement of the punch and die.
  • the die In the so-called ejection method, the die is stationary, and the lower punch moves the compact at the level of the upper edge of the die. In the withdrawal process, however, the lower punch is stationary and the die is adjusted by the desired amount down.
  • removal causes problems when the compact has undercuts.
  • a die for the production of compacts To divide powder material and move the die parts apart to remove the compact.
  • undercuts, holes or the like slide which are mounted displaceably in the die along an axis transverse to the Hauptpreßachse. The slider is in the mold cavity during filling and is removed before the compact is ejected.
  • the displaceable parts must also have an adjusting drive, which is usually formed by a hydraulic cylinder.
  • the end position of such a movable part in the mold cavity is formed by an end stop.
  • the invention has for its object to provide a press for the production of compacts of powder material, with the compacts can be made with undercuts reproducible with high accuracy without affecting the inner structure of the compacts.
  • a sensor which measures actual states of the adjusting drive for the slide, the transverse punch or a displaceable part of the die.
  • Actual states are, for example, the positions of the transverse adjustment drive or the part driven therewith, the force which the adjusting drive applies, etc.
  • the measurement of one or more such actual values occurs not only during the pressing process but also during the discharge of the compact.
  • a control device compares one or more actual states with a setpoint or a setpoint curve, and the adjustment is adjusted according to the difference between actual and setpoint accordingly.
  • the transversely movable part (slide, cross-punch, female part) can be regulated adjusted, both in the compression and in the decompression phase.
  • the transversely movable part can be driven precisely to a desired position, which can also be different, which is not possible to realize with end stops.
  • compacts which have an undercut and which can not be removed from the matrix in a conventional manner can be produced with the same reproducibility, as is the case with simply shaped compacts.
  • a hydraulic, pneumatic, electrical or electro-mechanical adjustment is provided.
  • a displacement measuring system is associated with the adjustment, and the control device stops the adjustment when a predetermined position of the slider, the cross bar or the female part has been reached, or the adjustment adjusts the driven part according to a predetermined Wegzeitkurve.
  • the position measuring system can operate optically, inductively or magnetostrictively or with the aid of a ruler on which a measuring slide actuated by adjusting drive is guided.
  • the adjusting drive can be assigned according to a further embodiment of the invention, a force measuring system, and the control device adjusts the adjustment drive according to predetermined force values or according to a predetermined force time or Kraftwegkurve.
  • a load cell or a pressure sensor can be provided for measuring the force applied to the pressing material.
  • the adjustment drive for the transversely movable part is preferably arranged on the die table according to a further embodiment of the invention.
  • the mold cavity has no end stop for the transversely displaceable part. This reduces the expense of the die and eliminates the risk of damage to the adjustable part and tool.
  • a die table 10 which may also be referred to as a die plate, is arranged in a frame, not shown, of a press for the production of powder material.
  • the die table 10 can be arranged stationarily in the press frame (ejection operation) or, in turn, can be adjusted vertically along an axis 12 by hydraulic cylinders not shown here (take-off method).
  • a die 14 is secured with a mold cavity 16. With the mold cavity acts a punch 20 and a lower punch 20 together.
  • Upper and lower punches 18, 20 are adjustable by a hydraulic drive, not shown, along the axis 12, as indicated by double arrow 22 and 24 respectively.
  • the lower punch 20 When filling the mold cavity 16 with a molding powder by means of a filling device, not shown, there is the lower punch 20 by a certain amount in the mold cavity 16 and thereby predetermines the filling volume.
  • the upper punch 18 is located at some distance vertically above the die 14.
  • the hydraulic drives drive the punch 18, 20 and press the molding material in the mold cavity 16 to a compact of predetermined dimensions and density.
  • the non-visible mold cavity 16. contains an undercut, which requires that in this area an additional ram comes to act. Such is shown at 26.
  • a hole should be made in the compact.
  • a bore-forming rod-shaped mold 28 is provided in the form of a slider. Both tools are actuated by means of a hydraulic adjusting drive 30 and 32, respectively.
  • the axis of the Querpreßst Zis 26 has to the horizontal, which is formed by the top of the die table 10, an angle ⁇ .
  • the slider 28 is parallel to the top of the die table 10 and radially with respect to the axis 12.
  • the die 14 has corresponding openings, not shown here, through which the dies 26, 28 can penetrate into the mold cavity 16.
  • the hydraulic drives 30, 32 are operated regulated. This is shown in FIG. 2. In Fig. 2, only the control of the drive 30 is shown.
  • the adjusting drive 30 is realized in Fig. 2 by a hydraulic cylinder 34 with a Piston rod 36 which is coupled to the Querpreßstempel 26.
  • Pressure sensors 38, 40 measure the pressure in the piston and piston rod chamber of the hydraulic cylinder 34, which can be coupled via a control valve 42 with a hydraulic pressure source, not shown here.
  • the control valve is controlled by means of a computer 44, in which the measuring signals of the pressure sensors 38, 40 are indicated.
  • a force sensor 46 measures the pressing force raised by the cylinder 34 on the transverse punch 26 and sends its measuring signals to the computer 44.
  • a position sensor 48 measures the position of the hydraulic cylinder 34 or of the piston or piston rod 36 and also sends its measuring signals to the control computer.
  • control computer 44 different setpoints or setpoint curves can be stored. For example, the end position of the drive 34 can be specified. If it is reached, which is detected by the position sensor 48, a further adjustment of the hydraulic cylinder 34 is stopped. A travel time curve can also be stored in the control computer, with the aid of the position sensor 48 once again measuring the distance traveled by the transverse pressing ram 26 with the aid of the hydraulic cylinder 34. In this case, the computer 44 ensures that the predetermined path is tracked within a predetermined time. A control regulates deviations of the measured actual states from the desired state.
  • the computer can also be stored a predetermined maximum force, which is measured by means of the force sensor.
  • the force sensor may e.g. a load cell between the piston rod 36 and the transverse punch 26, may also be provided by e.g. the pressure sensor 38 are formed indirectly.
  • the cross pressing ram reaches a predetermined maximum force during the pressing process, the adjustment is terminated.
  • the computer 44 may additionally or alternatively be stored a Wegkraftkurve along the Querpreßstempel 26 performs its pressing.
  • the transverse punch 26 can be selectively removed from the mold cavity 16, for example by reducing the pressing force and slowly pulling it out according to given parameters. Also, such a desired curve or such desired parameters can be stored in the computer 44 so that after the pressing operation by the transverse punch 26 a targeted relief from the compact is made possible.
  • the slider 28 can be operated with a similar control device as shown in FIG.
  • the die 14 may be a so-called split die, at least part of which is removed in a direction transverse to the axis 12 from the fixed part to facilitate demolding of the compact. In this case, in particular the removal in a controlled manner to strive to the Purpose to relieve compact so that cracks or the like can be avoided after the compression phase.
  • the actuation of the adjustable female part can also be performed by one of the described actuators 30 and 32 with a control device according to FIG. 2.
  • a die 50 is rotatably mounted on a die table 10. The angle of rotation is indicated by ⁇ .
  • a lever 52 is mounted, which cooperates with a piston rod 54 of an adjusting.
  • the adjusting cylinder 54 is articulated at 58 on the die plate 10. With the aid of the adjusting cylinder 54, therefore, the die 50 can be rotated during the pressing operation.
  • Upper punch 18 and lower punch 20 are e.g. twisted to produce helical parts such as e.g. Drill bits.
  • the drilled upper and lower dies 18, 20 move vertically in the die 50 as it rotates. For forming the rotational movement of the die is reversed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Control Of Presses (AREA)
EP07006498A 2006-05-02 2007-03-29 Presse destinée à la fabrication de comprimés en matériau poudreux Withdrawn EP1852247A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006020213A DE102006020213B4 (de) 2006-05-02 2006-05-02 Presse zur Herstellung von Preßlingen aus Pulvermaterial

Publications (2)

Publication Number Publication Date
EP1852247A2 true EP1852247A2 (fr) 2007-11-07
EP1852247A3 EP1852247A3 (fr) 2010-07-07

Family

ID=38134111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07006498A Withdrawn EP1852247A3 (fr) 2006-05-02 2007-03-29 Presse destinée à la fabrication de comprimés en matériau poudreux

Country Status (3)

Country Link
US (1) US20080020082A1 (fr)
EP (1) EP1852247A3 (fr)
DE (1) DE102006020213B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2098317A1 (fr) * 2007-12-04 2009-09-09 Osterwalder AG Procédé et dispositif de fabrication d'une pièce moulée en poudre de métal
US8033805B2 (en) 2007-11-27 2011-10-11 Kennametal Inc. Method and apparatus for cross-passageway pressing to produce cutting inserts
US8062014B2 (en) 2007-11-27 2011-11-22 Kennametal Inc. Method and apparatus using a split case die to press a part and the part produced therefrom

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090257904A1 (en) * 2008-04-11 2009-10-15 Roger Lawcock Device and method for pressing a metal powder compact
DE102012024503A1 (de) * 2012-12-14 2014-06-18 Dorst Technologies Gmbh & Co. Kg Keramik- und/oder Metallpulver-Pressenanordnung zum Pressen eines Formteils
DE102013109157B4 (de) * 2013-08-23 2016-06-09 Fette Compacting Gmbh Presse zur Herstellung von Presslingen aus pulverförmigem Material
AT14162U1 (de) * 2013-10-31 2015-05-15 Ceratizit Austria Gmbh Pressenanordnung mit Nachbearbeitungsmodul
JP6775311B2 (ja) 2016-03-29 2020-10-28 株式会社菊水製作所 成形品製造システム
EP3335868B1 (fr) * 2016-12-12 2021-06-09 Kikusui Seisakusho Ltd. Organe de commande et procédé de commande pour machine de moulage par compression rotative

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4770572A (en) * 1985-04-22 1988-09-13 Amino Iron Works Co., Ltd. Press for manufacturing helical gears
EP0289638A1 (fr) * 1987-05-07 1988-11-09 Gräbener Pressensysteme GmbH & Co. KG Presse, notamment pour fabriquer des articles pressés à dimensions exactes à partir de matières pulvérulentes, et procédé pour l'opération d'une telle presse
JPH0673409A (ja) * 1992-05-25 1994-03-15 Pooraito Kk 焼結金属による多段ヘリカルギヤの製造法
US5378416A (en) * 1992-07-28 1995-01-03 Nissan Motor Co., Ltd. Method of and system for manufacturing powder moldings
DE19508952A1 (de) * 1995-03-13 1996-09-19 Schwaebische Huettenwerke Gmbh Vorrichtung zur Erzeugung eines Formteils und entsprechendes Formteil
JPH09143506A (ja) * 1995-11-14 1997-06-03 Mitsubishi Materials Corp 粉末成形方法および粉末成形装置および粉末成形金型
EP1602472A1 (fr) * 2004-06-02 2005-12-07 SMS Meer GmbH Procédé et installation pour la préparation d'une pièce compactée à partir de poudre

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4260346A (en) * 1979-10-09 1981-04-07 Anderson Jr Raymond B Press assembly for powder material
US4676421A (en) * 1986-03-31 1987-06-30 Penn Engineering & Manufacturing Corp. Press having a programmable ram with sensing means
JP3059406B2 (ja) * 1997-08-27 2000-07-04 本田技研工業株式会社 圧粉成形装置
US6698495B2 (en) * 2002-05-22 2004-03-02 Dale Otto Rusch Oil between air rotational drive system with end of cycle impact cushion
US6986866B2 (en) * 2002-11-04 2006-01-17 Kennametal Inc. Method and apparatus for cross-hole pressing to produce cutting inserts
DE102004008322B4 (de) * 2004-02-20 2008-11-27 Fette Gmbh Pulverpresse

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4770572A (en) * 1985-04-22 1988-09-13 Amino Iron Works Co., Ltd. Press for manufacturing helical gears
EP0289638A1 (fr) * 1987-05-07 1988-11-09 Gräbener Pressensysteme GmbH & Co. KG Presse, notamment pour fabriquer des articles pressés à dimensions exactes à partir de matières pulvérulentes, et procédé pour l'opération d'une telle presse
JPH0673409A (ja) * 1992-05-25 1994-03-15 Pooraito Kk 焼結金属による多段ヘリカルギヤの製造法
US5378416A (en) * 1992-07-28 1995-01-03 Nissan Motor Co., Ltd. Method of and system for manufacturing powder moldings
DE19508952A1 (de) * 1995-03-13 1996-09-19 Schwaebische Huettenwerke Gmbh Vorrichtung zur Erzeugung eines Formteils und entsprechendes Formteil
JPH09143506A (ja) * 1995-11-14 1997-06-03 Mitsubishi Materials Corp 粉末成形方法および粉末成形装置および粉末成形金型
EP1602472A1 (fr) * 2004-06-02 2005-12-07 SMS Meer GmbH Procédé et installation pour la préparation d'une pièce compactée à partir de poudre

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8033805B2 (en) 2007-11-27 2011-10-11 Kennametal Inc. Method and apparatus for cross-passageway pressing to produce cutting inserts
US8062014B2 (en) 2007-11-27 2011-11-22 Kennametal Inc. Method and apparatus using a split case die to press a part and the part produced therefrom
EP2098317A1 (fr) * 2007-12-04 2009-09-09 Osterwalder AG Procédé et dispositif de fabrication d'une pièce moulée en poudre de métal

Also Published As

Publication number Publication date
DE102006020213A1 (de) 2007-11-08
US20080020082A1 (en) 2008-01-24
DE102006020213B4 (de) 2009-09-10
EP1852247A3 (fr) 2010-07-07

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