EP2403669A2 - Outillage de presse - Google Patents
Outillage de presseInfo
- Publication number
- EP2403669A2 EP2403669A2 EP10707503A EP10707503A EP2403669A2 EP 2403669 A2 EP2403669 A2 EP 2403669A2 EP 10707503 A EP10707503 A EP 10707503A EP 10707503 A EP10707503 A EP 10707503A EP 2403669 A2 EP2403669 A2 EP 2403669A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- sectors
- die
- tooling according
- matrix
- inserts
- 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
Links
- 238000003825 pressing Methods 0.000 title abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims description 31
- 230000033001 locomotion Effects 0.000 claims description 8
- 230000007547 defect Effects 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 12
- 238000007906 compression Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 10
- 239000000843 powder Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000254 damaging effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000003879 lubricant additive Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- B30B11/02—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
- 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
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/022—Moulds for compacting material in powder, granular of pasta form
-
- 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
- B22F2003/033—Press-moulding apparatus therefor with multiple punches working in the same direction
Definitions
- the subject of the invention is a press tool.
- the manufacture of mechanical parts by powder pressing to give a compact blank, followed by sintering may involve the use of uniaxial compression machines comprising a die in a housing from which the powder is poured and an engaging punch. in the housing for compressing the powder or, alternatively, a pair of punches engaging two opposite ends of the housing in two opposite directions.
- These presses operate at relatively high rates.
- the applications are numerous: they may concern mechanical metal or ceramic parts such as gears, magnets, nuclear fuel pellets, etc. This kind of process, however, has disadvantages.
- One of the most important appears in the release of the compressed part gradually out by an axial thrust movement of the housing.
- the compression has produced radial stresses in the room, which are released as it leaves the housing.
- Still other methods include adding rubber or other flexible materials to the matrix that facilitate demolding and are then sacrificed, but this is also expensive.
- the invention has been designed to overcome these drawbacks and allow automatic and reliable compression of high-speed parts while reducing the risk of damage to pressed parts during demolding and subsequent defects in shape and size, often attributable to bad return to the original sector position of the die that have been discarded to promote demolding.
- the invention in a general form, relates to a tooling of a press comprising at least one movable punch, the tooling comprising a die into which the punch penetrates, the die being composed of sectors, a frame surrounding the die, which slidably presses on the frame by conical surfaces, means for moving the frame relative to the die in a direction of mobility of the punch, characterized in that the die comprises a unitary part to which the sectors are unitedly joined and the sectors include inserts on their inner side.
- the construction of the matrix in sectors joined together with a unitary part, which can be full and then constitute a bottom of the housing of the matrix in which the parts are formed, or in the form of hollow cylinder capable of allowing passage to a lower punch allows to take advantage of the elasticity of the material of the matrix to allow the separation of the sectors under the internal pressure of the parts once they have undergone the pressing, then to help the reclosing of the matrix after the demolding of the parts .
- the spacing of the sectors remains at a low level, just corresponding to the expansions sufficient to reduce the internal pressure of the parts, which greatly reduces the risk of accidental insertion of material and in particular of the pressing powder constituting the parts, which would adversely affect the reclosing of the matrix and the quality of the subsequent manufacture.
- a preferred construction thus comprises a main portion of titanium matrix and carbide steel inserts.
- the inserts are also amenable to modifications of shape or dimensions by machining, especially if they are machined on their internal face tilt of variable conicity over their height depending on defects in shape and dimensions of parts manufactured by the press: this machining then contributes to the improvement of the parts during manufacture of the series as a function of the derivations of measured dimensions or shape, without any damaging effect on the matrix since it will then suffice to replace the inserts.
- the matrix is also amenable to modifications of shape or dimensions by machining, especially if they are machined on their internal face tilt of variable conicity over their height depending on defects in shape and dimensions of parts manufactured by the press: this machining then contributes to the improvement of the parts during manufacture of the series as a function of the derivations of measured dimensions or shape, without any damaging effect on the matrix since it will then suffice to replace the inserts.
- the matrix According to another conception, the matrix
- the means of movement of the frame relative to the die comprises a crown on a raised face of which the frame is placed by rollers, a means of applying the frame against the crown, and a support of the crown and matrix; and according to a further improvement, the support comprises a circular imprint in which the ring is housed, the ring comprises a toothing protruding from the cavity, and a pinion driven by the motor is mounted on the support and meshes with the toothing.
- This control means makes it possible to apply a force that is well distributed and dosed to the frame and to the die by virtue of the regularity of shape of the crown, the distribution of the rollers over a circumference and the elasticity of the assembly.
- FIG. 4 is an enlarged view of the cam regulating the height of the strapping ring of the die
- FIG. 5 is a close-up view, in diametrical section, of the matrix and the housing,
- FIG. 6 is a view from above of the matrix
- FIG. 7 is a schematic view of another embodiment of the invention.
- FIG. 1 represents a press comprising a control system 1, an upper punch 2, a lower punch 3 and a tool 4 specific to the invention which comprises a die 5.
- the upper punch 2 and the lower punch 3 comprise rods 6 and 7 directed towards each other.
- the die 5 comprises a housing 8 in alignment with the rods 6 and 7, which can penetrate between opposite orifices 9 and 10.
- the lower piston 3 and its rod 7 comprise a needle 37 which slides therein, and the rod 6 of the upper piston 2 comprises a housing 11 in front of the needle 37, which can enter therein. This arrangement makes it possible to compress hollow pieces of annular shape.
- the invention is not limited to this situation and also relates to presses without a needle, possibly with a single punch; the dwelling would then be provided with a single orifice and would include a bottom on the other side.
- the control system 1 governs the movement of the punches 2 and 3 and the rod 6.
- the control system 1 governs the movement of the punches 2 and 3 and the rod 6.
- the tool 4 comprises a support 12 in the form of a plateau on which rises a circular wall 13.
- An impression 14 is delimited by the wall 13 and receives a ring 15.
- the ring 15 slides on a track 16 of the cavity 14 and can rotate by sliding around the inner face of the wall 13.
- the ring 15 rises to above the wall 13 at its upper part, where it comprises a toothing 17 projecting outside.
- the support 12 carries a bearing 18 (FIG. 3) for rotatably holding a pinion 19, and it also carries a motor 20 for driving the pinion 19.
- the matrix 5 comprises a unitary lower portion 21 in the form of a hollow cylinder, placed on the support 12, and an upper portion 22 surmounting the preceding one, in one piece with it, composed of contiguous circle sectors 23, three in number for example, separated by slots but can come into contact with each other ( Figure 5).
- the housing 8 is inscribed in this upper part 22.
- the lower part 21 and the support 12 are recessed to allow passage to the lower punch 3.
- a frame 24 surrounds the upper part of the matrix 5. It comprises a ring 25 surrounding the sectors 23 to maintain their cohesion, and a plate 26.
- the plate 26 carries rods 27 (two of which are similar and opposite, one being shown in Figure 3) pointing downwards and engaged in the guns 28 fixed to the support 12. Springs 29 mounted in the guns 28 attract the rods 27 downwards.
- the ring 25 is provided with a trio of axes 30 of radial orientation, each bearing a bearing 31.
- Figure 4 shows that the bearings 31 weigh on an upper face 32 of the ring 15 and which comprises three cams 33 inclined, in phase with the bearings 31 respectively.
- the motor 20 rotates
- the pinion 19 drives the ring 15 in rotation
- the cams 33 move under the bearings 31, whose altitude varies with that of the ring 15; or the outer faces of the sectors 23 and the inner faces of the ring 25 are inclined and form conical adjustments 34 which has been shown in Figure 6 (greatly exaggerating their inclination for the sake of clarity).
- the inner faces of the sectors 23, delimiting the housing 8, are not cylindrical but undercut from the orifices 9 and 10, that is to say that the housing 8 widens slightly since the orifices 9 and 10 to tapered portions 35 and 36, respectively to the center, contrary to a provision common in this technical genre, where recess provisions are common to promote part release.
- the machine operates as follows. A not shown shoe pours powder to compact in the housing 8, the lower piston 3 closing the bottom.
- the upper piston 2 is lowered when the shoe has been removed, and it follows the compacting of the powder, the lower punch 3 can also be set in motion.
- the needle 37 is also set in motion if this is provided.
- the upper punch 2 is raised and a rotation of the motor 20 causes the displacement of the ring 25 and its lowering, which allows the sectors 23, remaining at the same height since in bearing on the fixed part 21, s' sliding away surfaces to conical adjustments 34 and open the matrix 5 until relaxation of the radial compressive stresses of the compressed part in the housing 8.
- the opening is limited to a few degrees by the elastic stress that appears at the foot sectors 23, their connection to the lower part 21 which they are integral.
- the die 5 can be made of titanium to have the desired elasticity.
- the flexion is sufficient, thanks to the fineness of the lower part 21.
- This tool lends itself very well to automation since the sectors 23 retained in the ring 25 remain supported and guided by it and the lower part 21, without the possibility of falling or to disperse in another way. Their setting in position is obtained with precision.
- the device is simple and therefore reliable, especially since it depends on a single engine and does not use delicate transmissions.
- the conical adjustments 34 have in practice a few degrees of inclination, and the inclinations of the conical portions 35 and 36 of the housing 8 are also small and simply compensate for the differential shrinkage of the sintered parts based on the compression and density irregularities. A few cents or a few per thousand are common.
- the inclinations are not necessarily uniform over the height of the housing 8: they must rather be determined by the designer according to the results of a first series of compression and sintering tests, which will have indicated to him empirically the defects of shape and size of the parts and therefore the compensation to operate for the radius of the housing 8 at each height. He then proceeds to a corrective machining of the internal faces of the sectors 23.
- Figure 7 shows a slightly different embodiment, where the sectors 23 are replaced by other sectors 40, here conical single interior faces 42, so that the housing 41 blossoms down.
- the lower part 43 of the matrix is here solid and unitary and forms a continuous bottom 44, to which the sectors 40 are joined, for the housing 41.
- This arrangement is well suited to a machine devoid of lower punch, where the upper punch assumes only the compression.
- the sectors 23 and 40 are provided with inserts 46 removable fixed on their inner face, which thus undergo the profile correction machining and can be replaced without the matrix 5 must be changed itself when a room different must be manufactured.
- the inserts 46 may be of carbide steel to have a high hardness and withstand the friction and pressure produced by pressing the pieces, which can not the titanium of the matrix 21 or 43. They also equip the previous embodiment. The rest of the device is unchanged.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0951360A FR2942733B1 (fr) | 2009-03-04 | 2009-03-04 | Outillage de presse |
PCT/EP2010/052580 WO2010100123A2 (fr) | 2009-03-04 | 2010-03-02 | Outillage de presse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2403669A2 true EP2403669A2 (fr) | 2012-01-11 |
EP2403669B1 EP2403669B1 (fr) | 2019-02-20 |
Family
ID=41057685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10707503.8A Active EP2403669B1 (fr) | 2009-03-04 | 2010-03-02 | Outillage de presse |
Country Status (6)
Country | Link |
---|---|
US (1) | US8702411B2 (fr) |
EP (1) | EP2403669B1 (fr) |
JP (1) | JP5785100B2 (fr) |
CN (1) | CN102341201B (fr) |
FR (1) | FR2942733B1 (fr) |
WO (1) | WO2010100123A2 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3021805B1 (fr) | 2014-05-27 | 2019-05-03 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Presse pour mettre en forme des pastilles dans un environnement restreint et hostile et procede d'assemblage de la presse |
CN106738210A (zh) * | 2016-12-26 | 2017-05-31 | 同方威视技术股份有限公司 | 一种模具及利用该模具制造gos闪烁陶瓷的方法 |
WO2020033519A1 (fr) * | 2018-08-07 | 2020-02-13 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Pressage de pastilles orienté dans un champ magnétique |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2101015A (en) * | 1934-11-30 | 1937-12-07 | Anderson Edward | Hydraulic mold |
US2253003A (en) * | 1938-03-18 | 1941-08-19 | Johnson Lab Inc | Means for compressing finely divided substances and process therefor |
US2942298A (en) * | 1954-12-28 | 1960-06-28 | Unexcelled Chemical Corp | Molding apparatus |
US3734658A (en) * | 1971-11-24 | 1973-05-22 | Westinghouse Electric Corp | Rapid release mold |
JPS5716568Y2 (fr) * | 1979-03-01 | 1982-04-07 | ||
US4666389A (en) * | 1985-01-25 | 1987-05-19 | The Texas A&M University System | Apparatus for forming compacts from solid particles |
SU1444075A1 (ru) * | 1987-04-10 | 1988-12-15 | Республиканский инженерно-технический центр порошковой металлургии | Пресс-форма дл прессовани порошков в автоматическом режиме |
JPH01100206A (ja) * | 1987-10-12 | 1989-04-18 | Komatsu Ltd | 粉末成形法 |
SU1696141A1 (ru) * | 1989-11-14 | 1991-12-07 | Институт проблем материаловедения АН УССР | Устройство дл прессовани изделий из порошка |
DE4417663C2 (de) * | 1994-05-20 | 2003-12-04 | Gkn Sinter Metals Gmbh | Preßteil aus Metallpulver, Verfahren und Vorrichtung zu seiner Herstellung |
CN2213031Y (zh) * | 1994-12-09 | 1995-11-22 | 翟秋朗 | 一种冲压模具 |
JP3445004B2 (ja) * | 1995-01-10 | 2003-09-08 | 日本碍子株式会社 | プレス金型 |
US6440357B1 (en) * | 1996-05-09 | 2002-08-27 | Stackpole Limited | Compacted-powder opposed twin-helical gears and method |
JP3433683B2 (ja) | 1998-10-28 | 2003-08-04 | トヨタ自動車株式会社 | 粉末成形型及び粉末の成形方法 |
JP2001003104A (ja) * | 1999-06-18 | 2001-01-09 | Mitsubishi Materials Corp | 粉末から成形体を成形する方法 |
SE0003755L (sv) * | 2000-10-17 | 2002-04-18 | Skf Ab | Metod och anordning fö pulverpressning |
US7128547B2 (en) | 2004-01-13 | 2006-10-31 | Chien-Min Sung | High pressure split die and associated methods |
DE102005024171A1 (de) * | 2005-03-22 | 2006-09-28 | Grünenthal GmbH | Verfahren und Vorrichtung zur Ultraschallverpressung einer Tablette oder einer multipartikulären Arzneiform |
JP2006334630A (ja) * | 2005-06-01 | 2006-12-14 | Nippon Tungsten Co Ltd | 成型用金型とその使用方法 |
DE602006003481D1 (de) * | 2005-07-19 | 2008-12-18 | Abrasive Tech Inc | Verfahren und Vorrichtung zum Herstellung von Schleifwerkzeugen |
FR2894871B1 (fr) * | 2005-12-16 | 2008-01-18 | Commissariat Energie Atomique | Dispositif de mise en forme de materiau compactable et procede d'utilisation du dispositif |
US7381046B2 (en) * | 2006-06-27 | 2008-06-03 | Fu Chin Kuo | Lipstick making device |
AT505947B1 (de) * | 2007-11-14 | 2016-04-15 | Miba Sinter Austria Gmbh | Verdichtungswerkzeug |
-
2009
- 2009-03-04 FR FR0951360A patent/FR2942733B1/fr not_active Expired - Fee Related
-
2010
- 2010-03-02 JP JP2011552409A patent/JP5785100B2/ja active Active
- 2010-03-02 CN CN201080010033.4A patent/CN102341201B/zh active Active
- 2010-03-02 EP EP10707503.8A patent/EP2403669B1/fr active Active
- 2010-03-02 WO PCT/EP2010/052580 patent/WO2010100123A2/fr active Application Filing
- 2010-03-02 US US13/254,061 patent/US8702411B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2010100123A2 * |
Also Published As
Publication number | Publication date |
---|---|
JP5785100B2 (ja) | 2015-09-24 |
WO2010100123A2 (fr) | 2010-09-10 |
CN102341201B (zh) | 2014-03-12 |
US20110311667A1 (en) | 2011-12-22 |
EP2403669B1 (fr) | 2019-02-20 |
US8702411B2 (en) | 2014-04-22 |
WO2010100123A3 (fr) | 2010-11-11 |
CN102341201A (zh) | 2012-02-01 |
FR2942733A1 (fr) | 2010-09-10 |
JP2012519080A (ja) | 2012-08-23 |
FR2942733B1 (fr) | 2015-12-25 |
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