EP0788415B1 - Procede de fabrication d'un galet de broyage bimetallique - Google Patents
Procede de fabrication d'un galet de broyage bimetallique Download PDFInfo
- Publication number
- EP0788415B1 EP0788415B1 EP95933415A EP95933415A EP0788415B1 EP 0788415 B1 EP0788415 B1 EP 0788415B1 EP 95933415 A EP95933415 A EP 95933415A EP 95933415 A EP95933415 A EP 95933415A EP 0788415 B1 EP0788415 B1 EP 0788415B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inserts
- shell
- cast iron
- temperature
- oven
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/08—Casting in, on, or around objects which form part of the product for building-up linings or coverings, e.g. of anti-frictional metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/004—Shape or construction of rollers or balls
- B02C15/005—Rollers or balls of composite construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/06—Casting in, on, or around objects which form part of the product for manufacturing or repairing tools
Definitions
- the present invention relates to a method of manufacture of a bimetallic grinding roller of form generally frustoconical or cylindrical, comprising a support cast in ductile iron machinable in the surface outside of which are embedded, longitudinally, in the direction of the generator, wear inserts in one high wear resistance material, said inserts being retained in the support by a bond mechanical.
- the invention also relates to a roller grinding obtained by the implementation of this process.
- grinding rollers consisting of a outer wear layer which is supported by a more ductile core. These rollers are made by successive flows of the wear layer and the core of support to form a metallurgical bond between the two materials. Since this manufacturing process can only be implemented for a few pairs of compatible materials for a bond metallurgical, we are limited in the choice of materials, both for the wear layer and for the core support. The realization of the metallurgical link also requires perfect synchronization of flows and good temperature control casting.
- the document EP 0 476 496 A1 recommends the technique inserts for the manufacture of grinding rollers by implementing a method as described in the preamble.
- the inserts are cast separately in first molds and then placed in a sand mold into which the support core is poured to form a mechanical connection between the two materials.
- the mechanical connection does not imply constraints of point of view choice of materials so that it is possible to choose harder alloys for inserts, for example strongly chrome cast irons alloyed or any other material very resistant to wear and more suitable alloys for the core, such as of spheroidal graphite cast iron.
- This technique also allows a doubling of the casting capacity, since the inserts are poured separately and can be stored for second casting.
- the object of the present invention is to provide a new process for manufacturing grinding rollers bimetallic which eliminates or at least mitigate the drawbacks associated with the known process, while safeguarding their benefits.
- the invention provides a process of the kind described in the preamble which is characterized in that a mold is used a transportable shell made of metal or any other material resistant to a temperature of minus 400 ° C, in that the inserts are drawn up periphery of the shell, in that we preheat the shell and inserts in an oven, in that one quickly unveils the shell with the inserts to place it on a centrifugal casting machine which is rotation, in that the ductile iron is poured and in that it is removed from the mold after cooling.
- Ductile iron is preferably a cast iron lamellar gray or nodular, while the inserts are preferably made of chrome cast iron or material very wear-resistant.
- the oven can be preheated to a temperature of in the range of 100 to 500 ° C.
- the centrifugal casting machine is driven in rotation at a speed of the order of 100 to 600 revolutions per minute.
- the mold can be removed from the mold when the temperature has dropped to a value of around 500 ° C.
- Casting by centrifugation also provides a natural complementarity effect beneficial to insert technology.
- the centrifugal force generated by the rotation of the shell ensures self-locking inserts against the shell wall and contributes thus to a better fixing of the inserts and to a reduced risk of displacement during casting.
- cast iron completely fills the spaces between inserts to ensure perfect crimping thereof, without risk of alveoli formation due to solidification of cast iron before filling all interstices.
- the mold shown in the figure is under the shape of a transportable shell 10 whose volume corresponds to a grinding roller, in this case a truncated cone of revolution.
- Shell 10 has a closure cover 12 with a tap hole central 14.
- the first step is to coat the interior with the shell of a thin refractory layer to protect the shell and facilitate demolding.
- inserts 16 previously poured into another mold not shown.
- These inserts 16 can be made of any material resistant to wear (e.g. carbides, ceramics, etc.) or cast iron chrome, of the kind described in the document EP 0 476 496 in which case they can be wedged together against the others and stuck by arching effect.
- the shell 10 with the inserts 16 is then placed in an oven preheated to a temperature of 100 at 500 ° C depending on the nature of the materials used to reheat the inserts to a sufficient temperature to avoid thermal shock.
- shell 10 is quickly removed and placed on the rotary table of a centrifugal casting machine known per se.
- This machine is driven at a speed can vary between 100 and 600 revolutions per minute to rotate the shell with the inserts around its vertical axis (arrow A).
- the carrier material of the roller for example gray lamellar or nodular cast iron.
- the cast iron spreads in the form of a frustoconical sheet on the inserts 16 and fills all the gaps between them.
- the demolding is carried out at a temperature of the order of 500 ° C.
- the roller thus produced has an axial frustoconical bore allowing it to be fixed by hooping on a support hub after a finishing machining.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Crushing And Grinding (AREA)
- Earth Drilling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
Description
Claims (7)
- Procédé de fabrication d'un galet de broyage bimétallique de forme généralement tronconique ou cylindrique comprenant un support coulé en fonte ductile usinable dans la surface extérieure duquel sont noyés, longitudinalement, dans le sens de la génératrice, des inserts d'usure en un matériau à haute résistance à l'usure, les dits inserts étant retenus dans le support par une liaison mécanique, caractérisé en ce que l'on utilise un moule constitué d'une coquille transportable (10) réalisée en métal ou en tout autre matériau résistant à une température d'au moins 400°C, en ce que l'on dresse les inserts (16) à la périphérie de la coquille (10), en ce que l'on préchauffe la coquille (10) et les inserts (16) dans un four, en ce que l'on défourne rapidement la coquille (10) avec les inserts (16) pour la placer sur une machine de coulée centrifuge qui est mise en rotation, en ce que l'on coule la fonte ductile (18) et en ce que l'on procède au démoulage après refroidissement.
- Procédé selon la revendication 1, caractérisé en ce que la fonte ductile est une fonte grise lamellaire ou nodulaire.
- Procédé selon la revendication 1, caractérisé en ce que les inserts sont en fonte au chrome fortement alliée ou en tout autre matériau très résistant à l'usure.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que l'on munit la coquille d'un mince enduit réfractaire avant la mise en place des inserts (16).
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la coquille et les inserts sont préchauffés dans un four à une température de l'ordre de 100 à 500°C.
- Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'on fait tourner la machine de coulée centrifuge à une vitesse de l'ordre de 100 à 600 tours par minute.
- Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'on effectue le démoulage à une température de l'ordre de 500°C.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU88549 | 1994-10-24 | ||
LU88549A LU88549A1 (fr) | 1994-10-24 | 1994-10-24 | Procédé de fabrication d'un galet de broyage bimétallique et galet de broyage obtenu par la mise en oeuvre de ce procédé |
PCT/EP1995/003744 WO1996012581A1 (fr) | 1994-10-24 | 1995-09-22 | Procede de fabrication d'un galet de broyage bimetallique et galet de broyage obtenu par la mise en oeuvre de ce procede |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0788415A1 EP0788415A1 (fr) | 1997-08-13 |
EP0788415B1 true EP0788415B1 (fr) | 1998-06-24 |
Family
ID=19731499
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95933415A Expired - Lifetime EP0788415B1 (fr) | 1994-10-24 | 1995-09-22 | Procede de fabrication d'un galet de broyage bimetallique |
Country Status (10)
Country | Link |
---|---|
US (1) | US5819838A (fr) |
EP (1) | EP0788415B1 (fr) |
JP (1) | JP3398752B2 (fr) |
KR (1) | KR100388509B1 (fr) |
CN (1) | CN1068808C (fr) |
CA (1) | CA2201307A1 (fr) |
DE (1) | DE69503145T2 (fr) |
LU (1) | LU88549A1 (fr) |
WO (1) | WO1996012581A1 (fr) |
ZA (1) | ZA959005B (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU90006B1 (fr) * | 1997-01-15 | 1997-08-21 | Magotteaux Int | Insert pour pièces d'usure composites procédé de fabrication d'une pièce d'usure à l'aide de tels inserts et pièce d'usure ainsi réalisée |
GB2348838B (en) * | 1999-04-07 | 2002-09-11 | Sweetmore Engineering Holdings | Method of spin coating |
JP2009183877A (ja) * | 2008-02-06 | 2009-08-20 | Ube Techno Enji Kk | 竪型粉砕機の粉砕ローラ |
CN101941064A (zh) * | 2010-08-25 | 2011-01-12 | 刘明强 | 离心法制造金属基复合双金属制品的方法 |
US9192987B2 (en) * | 2013-04-05 | 2015-11-24 | Caterpillar Inc. | Method of casting |
CN103920864A (zh) * | 2014-04-25 | 2014-07-16 | 安岳县金龙机械制造有限公司 | 一种复合铸造磨辊加工装置及其加工工艺 |
CN104959564A (zh) * | 2014-11-28 | 2015-10-07 | 东莞市晋益电子科技有限公司 | 一种双金属无缝隙嵌铸工件的生产方法 |
IT201800003964A1 (it) * | 2018-03-26 | 2019-09-26 | Valme S R L Unico Socio | Elemento tubolare per il trasferimento di materiali abrasivi, in particolare calcestruzzo, e procedimento per realizzarlo |
IT201800004795A1 (it) | 2018-04-23 | 2019-10-23 | Elemento tubolare per il trasferimento di materiali abrasivi, in particolare calcestruzzo, e procedimento per realizzarlo | |
CN108356244B (zh) * | 2018-05-02 | 2019-12-27 | 湖南四昉新材料有限公司 | 一种双金属轧辊外套的浇铸装置 |
CN110479979A (zh) * | 2019-08-06 | 2019-11-22 | 山东天物成型科技有限公司 | 双金属复合滚刀刀圈的生产方法 |
CN110465638A (zh) * | 2019-08-06 | 2019-11-19 | 山东天物成型科技有限公司 | 双金属复合滚刀刀圈生产工艺及其生产用电渣离心装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2155215A (en) * | 1936-02-27 | 1939-04-18 | Beament Thomas Geoffrey | Method of producing composite wear-resisting bodies |
JPS59202153A (ja) * | 1983-05-02 | 1984-11-15 | Mitsubishi Heavy Ind Ltd | 鋳かけ肉盛りロ−ルの製造方法 |
JPS63143949A (ja) * | 1986-12-09 | 1988-06-16 | アイエヌジ商事株式会社 | 粉砕機に使用される破砕面部材 |
GB8809795D0 (en) * | 1988-04-26 | 1988-06-02 | Vickers Plc | Application of bearing alloys to bushes |
BE1004573A4 (fr) * | 1990-09-20 | 1992-12-15 | Magotteaux Int | Procede de fabrication d'une piece de fonderie bimetallique et piece d'usure realisee par ce procede. |
DE4112000A1 (de) * | 1991-03-23 | 1992-09-24 | Karl Lange | Verfahren zur herstellung von verschleissgeschuetzten gussstuecken |
-
1994
- 1994-10-24 LU LU88549A patent/LU88549A1/fr unknown
-
1995
- 1995-09-22 US US08/817,853 patent/US5819838A/en not_active Expired - Lifetime
- 1995-09-22 CA CA002201307A patent/CA2201307A1/fr not_active Abandoned
- 1995-09-22 JP JP51361096A patent/JP3398752B2/ja not_active Expired - Fee Related
- 1995-09-22 EP EP95933415A patent/EP0788415B1/fr not_active Expired - Lifetime
- 1995-09-22 KR KR1019970702625A patent/KR100388509B1/ko not_active IP Right Cessation
- 1995-09-22 CN CN95195825A patent/CN1068808C/zh not_active Expired - Lifetime
- 1995-09-22 WO PCT/EP1995/003744 patent/WO1996012581A1/fr not_active Application Discontinuation
- 1995-09-22 DE DE69503145T patent/DE69503145T2/de not_active Expired - Lifetime
- 1995-10-24 ZA ZA959005A patent/ZA959005B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
JPH10507969A (ja) | 1998-08-04 |
LU88549A1 (fr) | 1995-02-01 |
US5819838A (en) | 1998-10-13 |
WO1996012581A1 (fr) | 1996-05-02 |
CA2201307A1 (fr) | 1996-05-02 |
KR100388509B1 (ko) | 2003-10-22 |
AU3609095A (en) | 1996-05-15 |
DE69503145T2 (de) | 1998-11-05 |
KR970706930A (ko) | 1997-12-01 |
AU691342B2 (en) | 1998-05-14 |
ZA959005B (en) | 1996-05-22 |
JP3398752B2 (ja) | 2003-04-21 |
CN1068808C (zh) | 2001-07-25 |
DE69503145D1 (de) | 1998-07-30 |
CN1161663A (zh) | 1997-10-08 |
EP0788415A1 (fr) | 1997-08-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0788415B1 (fr) | Procede de fabrication d'un galet de broyage bimetallique | |
EP0476496B1 (fr) | Procédé de fabrication d'une pièce de fonderie bimétallique et pièce d'usure réalisée par ce procédé | |
EP0742379B1 (fr) | Disque de frein et son procédé de fabrication | |
US2964251A (en) | Roll structure | |
KR20000070139A (ko) | 복합 내구재용 삽입물, 상기 삽입물을 이용한 내구재 제조방법및 그 내구재 | |
EP0650789B1 (fr) | Cylindre de coulée d'une installation de coulée continue sur un ou entre deux cylindres | |
FR2538719A1 (fr) | Ultracentrifugeuse et procede pour la fabrication de son rotor | |
EP0620065A1 (fr) | Procédé de fabrication de pièces d'usure composites et pièces réalisées par ce procédé | |
AU657296B2 (en) | A roll including a cemented carbide ring cast into a cast iron body | |
EP0112790B1 (fr) | Procédé de moulage d'un rotor de frein à couronne | |
FR2747061A1 (fr) | Lingotiere bi-materiau pour la coulee continue en charge verticale des metaux | |
US5188023A (en) | Cast formed bi-metallic worm assembly and method | |
EP1152855B1 (fr) | Procede et dispositif de moulage de pieces en titane | |
CH366636A (fr) | Organe de machine et procédé pour sa fabrication | |
BE711632A (fr) | ||
WO2005097376A2 (fr) | Moule pour la coulee d'un metal liquide et procede correspondant | |
EP0648563B1 (fr) | Procédé de moulage de pièces en fonte ou en tout autre métal présentant une température de fusion élevée | |
US3478811A (en) | Method and apparatus for casting an internally flanged tubular member | |
BE863704A (fr) | Procede de fabrication de frettes en alliage de fer et appareillage destine a realiser le procede | |
BE1000750A7 (fr) | Procede de fabrication d'un manchon refractaire par centrifugation. | |
FR2505217A1 (fr) | Moule de fonderie combine pour la fabrication de cylindres de laminage | |
BE391896A (fr) | ||
BE397358A (fr) | ||
JPH06238414A (ja) | 遠心鋳造用金型 | |
BE355409A (fr) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19970325 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE FR GB IT |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 19971008 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE FR GB IT |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19980624 |
|
REF | Corresponds to: |
Ref document number: 69503145 Country of ref document: DE Date of ref document: 19980730 |
|
ITF | It: translation for a ep patent filed |
Owner name: STUDIO TORTA S.R.L. |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20140822 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20140822 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20140826 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20140825 Year of fee payment: 20 Ref country code: FR Payment date: 20140922 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 69503145 Country of ref document: DE Representative=s name: HOEGER, STELLRECHT & PARTNER PATENTANWAELTE MB, DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69503145 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20150921 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20150921 |