EP1048450A2 - Verfahren zur Positionbestimmung eines Pressstempels einer Pulverpresse - Google Patents
Verfahren zur Positionbestimmung eines Pressstempels einer Pulverpresse Download PDFInfo
- Publication number
- EP1048450A2 EP1048450A2 EP00103757A EP00103757A EP1048450A2 EP 1048450 A2 EP1048450 A2 EP 1048450A2 EP 00103757 A EP00103757 A EP 00103757A EP 00103757 A EP00103757 A EP 00103757A EP 1048450 A2 EP1048450 A2 EP 1048450A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- press
- press ram
- computer
- displacement sensor
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000843 powder Substances 0.000 title claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 21
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Definitions
- the invention relates to a method for determining the position of a Press ram of a powder press, preferably a metal powder press according to the preamble of claim 1.
- the positioning accuracy is from Upper and lower punches of a powder press, for example one Metal powder press, important. It is an accuracy of ⁇ 0.01 mm to adhere to.
- the invention is therefore based on the object of a method for Specify the position of a ram of a powder press, the works precisely and is largely independent of press deformation due to pressing forces.
- Upper and lower stamps have a so-called absolute Displacement system that can work in a conventional manner. It works with relatively low accuracy for the rough travel range, a measuring accuracy of 0.01 mm is sufficient.
- an incremental is in the inventive method Travel sensor used, the z. B. a measurement accuracy of 0.25 microns having. This is actuated directly by the press ram, for example via a bracket on the press ram.
- the measuring range of such incremental encoder is relatively short. It is sufficient if the Position determination with the help of the incremental encoder shortly before The ram is immersed in the die.
- the switch from one to the other Position transducers at the highest travel speed e.g. B. 500 mm / sec.
- the computer processes the measured values a reference measure is saved.
- This reference measure gives one specified distance of the press ram to the upper edge of the die or Lower edge of the die again.
- the measure can be obtained in that a corresponding teaching is arranged between the stamp and the die table and the stamp at very low speed against the teaching is driven. Since the distance measure is known, it can be in the computer as Reference dimension can be saved. A so-called. Reference offset saved.
- the ram is continued from the reference dimension from the die and the number of Pulses are counted until a so-called index pulse is reached be generated. Indexing is done using the incremental Displacement sensor. Therefore, during the pressing process of the incremental Displacement sensor that only actuates when the reference offset is reached If the index pulse is triggered, the distance between the Stamp and the die known, and the incremental displacement sensor can then the position of the press ram when the pressing process is continued specify. Is the number of impulses covered, which results from the sum of reference measure and reference offset, the number corresponds to Subsequent pulses of the respective position of the ram in the Die hole.
- the number of pulses stored in the process of Press stamps are generated from the reference dimension to the reference offset.
- a second counter is the respective actual position by the incremental Position transducer recorded.
- the sum of the reference dimension and reference offset is stored in a buffer before the second counter.
- the Index pulse the buffer content is transferred to the second counter for the sole determination of the position by the incremental displacement sensor.
- the switchover takes place on the one hand from the absolute to the incremental transducer controlled by the Calculation within the scope of its process cycle time without loss of position.
- the reference value reference dimension + Reference offset
- the switchover takes place on the one hand from the absolute to the incremental transducer controlled by the Calculation within the scope of its process cycle time without loss of position.
- the reference value reference dimension + Reference offset
- Loss of position or falsification by electrical Interference can be prevented, especially when the press is in continuous operation and with it corresponding measurement errors.
- Machine frames are an upper press cylinder 12 and a lower one Press cylinder 14 attached.
- Each press cylinder has a piston 16 or 18 to actuate a ram 20 or 22.
- the cylinder 12 or 14, an absolute displacement sensor 24 or 26 is assigned.
- the Press die 20 has a boom 28 and the press die 22 one Extension arm 30.
- the arms 28, 30 act with an incremental Position measuring system 32 together.
- Upper stamp 20 and lower stamp 22 work together with a die 34, which is arranged in a die table 36.
- a die 34 which is arranged in a die table 36.
- At 38a is a compact indicated, which arises from the interaction of the ram 20, 22 and consists for example of metal powder.
- Fig. 2 the upper absolute displacement sensor 24 is indicated as well as his Position above the upper edge 38 of the die. You can also see the incremental displacement transducer 32 with a button 40, which is from the boom 28th is operated. A row of lines is indicated by 42, which represents should be that with an adjustment of the button 40 along the Double arrow 44 per stroke a pulse is generated. At 46 is in the Dash row 42 indicated a so-called index pulse, its meaning will be described below.
- FIG. 3 shows a computer at 50, which has a first counter 52 or Z1 and a second counter 54 or Z2.
- the counter Z2 is on Upstream of buffer 54a.
- block 56 is an add and Comparison unit provided, in which a reference measure is also stored.
- the computer 50 determines the position of the press ram can, for example, the ram 20 of FIG. 1, it is a Pass the reference dimension for the ram 20.
- the ram 20 from the cylinder 12 on a so-called. Reference dimension 58 (Fig. 2) driven. This is done with the help of e.g. B. one special teaching, the dimension of which is generated with high accuracy.
- a gauge can, moreover, the position of the ram relative to Upper die edge 38 are checked.
- the absolute Position transducer 24 is the absolute at any time after this command Position.
- the cylinder 12 moves the ram at a slow speed upwards until the incremental displacement sensor 32 receives the index pulse 46 reached.
- the counter Z1 detects the counting pulses from the reference dimension to Index pulse. The number of these pulses or the distance is shown in FIG 60 and is also given below as a reference offset.
- the sum of reference dimension 58 and reference offset is calculated in the computer and stored in the buffer 54a.
- the absolute Position transducers 24 and 26 the actual position on the computer 50. Simultaneously the computer finds a comparison between the two every millisecond Counter reading Z2 of the incremental displacement sensor 32 and the sum measure (Reference measurement + reference offset) instead. If the value of the counter Z2 is less than the sum measure, the computer takes the actual position from the counter Z2 and therefore works exclusively with high-precision incremental ones Sensor.
- the Boom 28 or 30 with the incremental displacement sensor 32 in Contact. This then activates the counter via the index pulse generated Z2 for taking over the content of the buffer 54a (reference dimension + Reference offset).
- the press die 20 is moved further in the direction of the upper edge 38 of the die, the counter value is reduced before Z2 and after that described above In comparison, the incremental measuring system for positioning becomes active.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Control Of Presses (AREA)
Abstract
- in einem Rechner wird ein Referenzmaß gespeichert, das einem vorgegebenen relativ geringen Abstand des Preßstempels zur Oberkante oder Unterkante der Matrize entspricht,
- im Rechner wird ein Referenzoffset gespeichert, der dadurch ermittelt wird, daß die Impulse eines vom Preßstempel betätigten inkrementalen Wegaufnehmers beim Hochfahren des Preßstempels vom Referenzmaß bis zu einem Indeximpuls gezählt werden,
- oberhalb des Referenzoffset wird die Position des Preßstempels mit Hilfe eines absoluten Wegaufnehmers gemessen, der den Weg des Verstellkolbens für den Preßstempel ermittelt und dessen Meßwerte in den Rechner gegeben werden und
- sobald die Istposition des Preßstempels gleich oder kleiner ist als das Summenmaß von Referenzoffset und Referenzmaß, werden die Impulse des inkrementalen Wegaufnehmers zur Positionierung in den Rechner gegeben.
Description
- Fig. 1
- zeigt schematisch eine Pulverpresse mit Wegaufnehmern.
- Fig. 2
- zeigt in zwei Darstellungen die Einstellung der Referenzpositionen der Presse nach Fig. 1
- Fig. 3
- zeigt ein Blockschaltbild der Rechnerfunktionseinheiten für die Positionsbestimmung der Presse nach Fig. 1.
Claims (2)
- Verfahren zur Positionsbestimmung eines Preßstempels bezüglich einer Matrize in einer Pulverpresse mit folgenden Schritten:in einem Rechner wird ein Referenzmaß gespeichert, das einem vorgegebenen relativ geringen Abstand des Preßstempels zur Oberkante oder Unterkante der Matrize entspricht,im Rechner wird ein Referenzoffset gespeichert, der dadurch ermittelt wird, daß die Impulse eines vom Preßstempel betätigten inkrementalen Wegaufnehmers beim Hochfahren des Preßstempels vom Referenzmaß bis zu einem Indeximpuls gezählt werden,oberhalb des Referenzoffset wird die Position des Preßstempels mit Hilfe eines absoluten Wegaufnehmers gemessen, der den Weg des Verstellkolbens für den Preßstempel ermittelt und dessen Meßwerte in den Rechner gegeben werden undsobald die Istposition des Preßstempels gleich oder kleiner ist als das Summenmaß von Referenzoffset und Referenzmaß, werden die Impulse des inkrementalen Wegaufnehmers zur Positionierung in den Rechner gegeben.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß ein erster Zähler die Anzahl der Impulse erfaßt, die beim Verfahren des Preßstempels vom Referenzmaß bis zum Referenzoffset erzeugt werden und ein zweiter Zähler die Istposition des inkrementalen Wegaufnehmers erfaßt, die Summe aus Referenzmaß und Referenzoffset in einen Puffer vor dem zweiten Zähler abgelegt wird und bei Erreichen des Indeximpulses der Pufferinhalt auf den zweiten Zähler übertragen wird zwecks alleiniger Positionsbestimmung durch den inkrementalen Wegaufnehmer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19919693 | 1999-04-30 | ||
| DE19919693A DE19919693C2 (de) | 1999-04-30 | 1999-04-30 | Verfahren zur Positionsbestimmung eines Preßstempels einer Pulverpresse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1048450A2 true EP1048450A2 (de) | 2000-11-02 |
| EP1048450A3 EP1048450A3 (de) | 2002-09-04 |
Family
ID=7906413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00103757A Withdrawn EP1048450A3 (de) | 1999-04-30 | 2000-02-23 | Verfahren zur Positionbestimmung eines Pressstempels einer Pulverpresse |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6442859B1 (de) |
| EP (1) | EP1048450A3 (de) |
| DE (1) | DE19919693C2 (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1277564A3 (de) * | 2001-07-19 | 2004-01-28 | Fette GmbH | Verfahren zum Verpressen von Pulvermaterial |
| EP1782943A3 (de) * | 2005-11-02 | 2009-06-03 | Fette GmbH | Verfahren und Meßsystem zur Bildung einer Referenz bei einer Pulverpresse |
| WO2019212999A1 (en) * | 2018-04-30 | 2019-11-07 | Wilson Tool International Inc. | Tool tracking and data collection assembly |
| WO2020207645A1 (de) * | 2019-04-09 | 2020-10-15 | Kramer W Dieter | Verfahren sowie eine messeinrichtung zum ausmessen bzw. kalibrieren von utensilien bei pressen |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10212315B4 (de) * | 2002-03-20 | 2004-04-29 | Wilhelm Fette Gmbh | Wegmeßsystem für eine Pulverpresse |
| US7194820B2 (en) * | 2005-05-09 | 2007-03-27 | Mate Precision Tooling Inc. | Punch press alignment instrument |
| US7484312B2 (en) * | 2005-05-09 | 2009-02-03 | Mate Precision Tooling, Inc. | Punch press alignment instrument |
| CN100415502C (zh) * | 2006-10-16 | 2008-09-03 | 许阳 | 干粉压机专用程序式电调系统及其控制方式 |
| CN101422970B (zh) * | 2007-11-02 | 2012-10-17 | 北京中科三环高技术股份有限公司 | 位置控制双向压制成型压机 |
| DE102008015820B4 (de) * | 2008-03-27 | 2013-02-28 | Fette Compacting Gmbh | Vorrichtung und Verfahren zur Messung der vertikalen Position von Ober- und Unterstempeln einer Rundläufer-Tablettenpresse |
| FR2951989B1 (fr) * | 2009-10-30 | 2012-02-03 | Medelpharm | Installation pour la realisation d'un produit solide a partir d'un ou de plusieurs materiaux pulverulents |
| JP5032690B1 (ja) * | 2011-07-27 | 2012-09-26 | 住友電気工業株式会社 | 圧粉成形体 |
| DE102016120195A1 (de) * | 2016-10-24 | 2018-04-26 | Dorst Technologies Gmbh & Co. Kg | Presseneinrichtung |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2542938A (en) * | 1949-06-29 | 1951-02-20 | David L Morris | Tool setter for lathes |
| SE398981B (sv) * | 1976-05-11 | 1978-01-30 | Malmberg Sven Kurt B | Forfarande vid fastsettning och centrering av stansverktyg och anordning for genomforande av forfarandet |
| DE2924704A1 (de) * | 1979-06-19 | 1981-01-15 | Dorst Keramikmasch | Einrichtung zur festlegung der hoehe von pressteilen an einer presse, insbesondere zum pressen von pressteilen aus pulverfoermigem ausgangsmaterial |
| JPS5838258B2 (ja) * | 1979-12-01 | 1983-08-22 | 双葉電子工業株式会社 | 金型の型合せ方法及び型合せ装置 |
| CH646895A5 (fr) * | 1982-05-18 | 1984-12-28 | Bobst Sa | Dispositif pour confectionner les matrices d'une presse a platines. |
| US4485660A (en) * | 1982-12-29 | 1984-12-04 | Toyota Jidosha Kabushiki Kaisha | Press sublifter with a movable gauge |
| SE456458B (sv) * | 1983-07-12 | 1988-10-03 | Nobel Elektronik Ab | Reglerkrets |
| DE3930475A1 (de) * | 1989-09-12 | 1991-03-14 | Dorst Masch & Anlagen | Presse zur herstellung masshaltiger presslinge aus pulverfoermigem material |
| DE4040410C1 (en) * | 1989-12-21 | 1991-11-07 | Bernhard Dr.-Ing. 4782 Erwitte De Juergenhake | Tooling for crimping electrical connectors - comprises crank press with spring-loaded plunger, connected torsionally to transducer providing displacement measurement |
| JPH08155694A (ja) * | 1994-11-30 | 1996-06-18 | Yoshitsuka Seiki:Kk | 粉末成形プレスにおける金型位置確認方法 |
| DE19846210A1 (de) * | 1998-10-07 | 2000-04-13 | Dorst Masch & Anlagen | Presse zum Herstellen von Formkörpern |
-
1999
- 1999-04-30 DE DE19919693A patent/DE19919693C2/de not_active Expired - Lifetime
-
2000
- 2000-02-23 EP EP00103757A patent/EP1048450A3/de not_active Withdrawn
- 2000-04-18 US US09/551,275 patent/US6442859B1/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1277564A3 (de) * | 2001-07-19 | 2004-01-28 | Fette GmbH | Verfahren zum Verpressen von Pulvermaterial |
| EP1782943A3 (de) * | 2005-11-02 | 2009-06-03 | Fette GmbH | Verfahren und Meßsystem zur Bildung einer Referenz bei einer Pulverpresse |
| US7803294B2 (en) | 2005-11-02 | 2010-09-28 | Fette Gmbh | Method and measuring system for obtaining a reference for a powder press |
| WO2019212999A1 (en) * | 2018-04-30 | 2019-11-07 | Wilson Tool International Inc. | Tool tracking and data collection assembly |
| US11204596B2 (en) | 2018-04-30 | 2021-12-21 | Wilson Tool International Inc. | Tool tracking and data collection assembly |
| WO2020207645A1 (de) * | 2019-04-09 | 2020-10-15 | Kramer W Dieter | Verfahren sowie eine messeinrichtung zum ausmessen bzw. kalibrieren von utensilien bei pressen |
| US11897220B2 (en) | 2019-04-09 | 2024-02-13 | Dietmar W Kramer | Method for measuring or calibrating utensils used in a press |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19919693C2 (de) | 2001-08-23 |
| EP1048450A3 (de) | 2002-09-04 |
| DE19919693A1 (de) | 2000-11-23 |
| US6442859B1 (en) | 2002-09-03 |
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