EP1899071B1 - Verfahren zur wiederaufarbeitung einer gebrauchten mahlwalze - Google Patents
Verfahren zur wiederaufarbeitung einer gebrauchten mahlwalze Download PDFInfo
- Publication number
- EP1899071B1 EP1899071B1 EP07725497A EP07725497A EP1899071B1 EP 1899071 B1 EP1899071 B1 EP 1899071B1 EP 07725497 A EP07725497 A EP 07725497A EP 07725497 A EP07725497 A EP 07725497A EP 1899071 B1 EP1899071 B1 EP 1899071B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- holes
- profile
- members
- roller
- roller body
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000012958 reprocessing Methods 0.000 description 13
- 238000004873 anchoring Methods 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49544—Roller making
- Y10T29/49545—Repairing or servicing
Definitions
- the invention relates to a method for reprocessing a used grinding roller of a high-pressure fine bed roller mill according to the preamble of claim 1 and to a grinding roller of a high pressure good bed roller mill according to the preamble of claim 4.
- Grinding rolls of this type are for example by the EP 0 516 952 B1 known. They contain a plurality of wear-resistant profile body, which are incorporated with part of their length in holes of the roller body and protrude with the remaining part of its length over the surface of the roller body. In the operation of such rolls, the spaces between the above profile bodies fill with the comminuted material fed to the good bed roller mill, which thus results in a certain autogenous wear protection for the surface of the roller body.
- a wear-resistant roller for high-pressure roller presses with multi-part, pin-shaped pieces of material is known, which are used in recesses of the roller body.
- the projecting over the surface of the roller body part of the material piece is made of a wear-resistant material, while the lower part is formed by an insert, which is made of another deformable material or consists of bulk material and completely fills the remaining cavity.
- both the protruding profile body and the surface of the roller body are subject to unavoidable wear in the course of operation.
- a grinding roller is known in which the hardness of the roll surface forming material of the roll body is greater than 56 HRc (hardness according to Rockwell).
- HRc hardness according to Rockwell.
- This Mahlwalzc is used in the crushing operation until a substantial part of all profile body completely worn and / or dropped out of the roll body.
- the reprocessing of the used grinding roller is then carried out in such a way that the roll surface is brought back into a cylindrical shape by completely turning off the profiled body and the original holes, after which new holes are produced and inserted into these holes new profile body.
- the invention is therefore based on the object, a method according to the preamble of claim 1 in such a way that a particularly time and material-saving and thus cost-effective reprocessing of a used grinding roller is achieved.
- a grinding roller which is to be worked up again by the process according to the invention is (in contrast to the grinding roller according to DE 196 18 143 A1 ) not so long in the. Used crushing operation until a substantial part of all profile body has worn out completely and / or fallen out of the roll body. The reprocessing takes place rather already at a time before the surface of the roller body is worn to near the bottom of the existing hole. This makes it possible, the surface of the roller body is not completely corresponding to the depth of the original holes Turn off measure, but make a partial material removal (at least in the particularly worn portion of the width of the roll body) only to a diameter that is greater than the diameter of the bottom of the existing holes. This partial twisting of the worn surface of the roller body is inventively facilitated by the fact that the surface of the roller body (unlike the solution according to DE 196 18 143 A1 ) has a lower hardness than the above profile body.
- the surface of the roller body often has a different state of wear in individual subregions (approximately in the middle and at the edges of the width of the roller body), it may be advantageous in individual cases to combine the three abovementioned variants of re-fitting the roller body with profiled bodies.
- Fig. 1 shows (in a schematic longitudinal partial section through the roller) left the new condition of the roller.
- the roller body 1 is provided with a plurality of holes 4, are embedded in the profile body 2 with a portion of their length, while they protrude with the remaining part of its length over the surface 1a of the roller body 1.
- Fig. 1 shows on the right the worn condition after a certain operating time.
- the surface 1'b of the roll body 1 ' is now - different in the individual areas - more or less removed.
- the profile body 2 'shortened by the wear compared to the original length (contour line 3).
- Fig. 2 illustrates how a used grinding roller can be worked up again, for example, by the process according to the invention.
- the worn profile body 2 ' On the left is the worn state of the roller body 1 'and the profile body 2' shown.
- the worn profile body 2 ' are first removed.
- the worn surface 1'b of the roller body 1 ' is turned off to a diameter D.
- This diameter D is greater than the diameter D b of the bottom of the existing holes 4.
- the new surface is denoted by 1'c.
- new holes 4 are made and used new profile body 2c.
- the solution of Fig. 3 has the advantage that for any further reprocessing of the roller even more AbtragTablees material of the roll body is available.
- the solution has the Fig. 2 the advantage that because of the deeper anchoring of the new profile body used in the first reprocessing longer operating time of the roller is possible until the next reprocessing.
- the new state of the roller is illustrated on the right.
- profile body 2e are shorter in length on a distance or pressure mass 6, which in turn is supported on the bottom of the bore 4 and serves for length compensation.
- 6 new profile body 2f can be used after removing the distance or pressure mass, without a deepening of the holes 4 is necessary. However, it is also possible to deepen the holes at the same time as removing the spacer or pressure mass.
- Fig. 4 thus have the holes 4 in the new state of the grinding roller ( Fig. 4 right) to a depth which is greater than the minimum depth required for secure support of profile bodies. Until the time of the first reprocessing, the "excess depth" is absorbed by the distance or pressure mass 6. After the first reprocessing and removal of the spacer or pressure mass, the holes 4 then just have the sufficient depth for secure support of the profile body ( Fig. 4 Left).
- FIG. 1 shows a variant in which, for reprocessing the worn roller body 1 ', the surface 1'b is first turned off, at least in a partial region of the width of the roller body, so that a new cylindrical surface 1'f is produced. Then first the still existing, but often by removing the worn profile body in the mouth slightly damaged holes 4 are provided with a countersink 5 to a proper centering of the drill for re-drilling the holes. 4 to ensure. By boring the holes 4 are then on to the new (in Fig. 5 not shown) profile body deepened.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006028546A DE102006028546A1 (de) | 2006-06-21 | 2006-06-21 | Verfahren zur Wiederaufarbeitung einer gebrauchten Mahlwalze |
PCT/EP2007/004597 WO2007147474A1 (de) | 2006-06-21 | 2007-05-23 | Verfahren zur wiederaufarbeitung einer gebrauchten mahlwalze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1899071A1 EP1899071A1 (de) | 2008-03-19 |
EP1899071B1 true EP1899071B1 (de) | 2010-07-28 |
Family
ID=38294054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07725497A Active EP1899071B1 (de) | 2006-06-21 | 2007-05-23 | Verfahren zur wiederaufarbeitung einer gebrauchten mahlwalze |
Country Status (11)
Country | Link |
---|---|
US (1) | US20090178280A1 (pt) |
EP (1) | EP1899071B1 (pt) |
AU (1) | AU2007263387B2 (pt) |
BR (1) | BRPI0708406A8 (pt) |
CA (1) | CA2643959C (pt) |
DE (2) | DE102006028546A1 (pt) |
DK (1) | DK1899071T3 (pt) |
PE (1) | PE20080623A1 (pt) |
RU (1) | RU2427426C2 (pt) |
WO (1) | WO2007147474A1 (pt) |
ZA (1) | ZA200806297B (pt) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007018090A1 (de) | 2007-04-17 | 2008-10-23 | Polysius Ag | Mahlwalze sowie Verfahren zur Wiederaufarbeitung |
DE102008014809A1 (de) * | 2008-03-18 | 2009-09-24 | Khd Humboldt Wedag Gmbh | Verfahren zum Rundumerneuern einer Mahlwalze |
DE102010010431B4 (de) | 2010-03-05 | 2012-04-05 | Thyssenkrupp Polysius Ag | Verfahren zur Wiederaufarbeitung der verschlissenen Oberfläche von Mahlwalzen einer Gutbettwalzenmühle |
DE102010060600B3 (de) * | 2010-11-16 | 2012-03-01 | Polysius Ag | Verfahren von Aufbereitung von gebrauchten Walzenkörpern einer Walzenmühle sowie aufbereiteter Walzenkörper |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4897519A (en) * | 1988-03-14 | 1990-01-30 | Westinghouse Electric Co. | More creep resistant turbine rotor, and procedures for repear welding of low alloy ferrous turbine components |
US4924581A (en) * | 1988-11-22 | 1990-05-15 | Techniair, Inc. | Turbine air seal repair process |
DE4132474A1 (de) | 1991-05-28 | 1992-12-03 | Kloeckner Humboldt Deutz Ag | Verschleissfeste mahlwalze fuer die verwendung in walzenmaschinen, insbesondere in hochdruckwalzenpressen |
DE4321427A1 (de) * | 1992-07-09 | 1994-01-13 | Kloeckner Humboldt Deutz Ag | Verschleißfeste Walze für die Verwendung in Zweiwalzenmaschinen, insbesondere in Hochdruck-Walzenpressen |
US5764561A (en) * | 1995-11-16 | 1998-06-09 | Rohm Co., Ltd. | Ferroelectric memory devices and method of using ferroelectric capacitors |
DE19618143A1 (de) * | 1996-05-06 | 1997-11-13 | Krupp Polysius Ag | Mahlwalze sowie Betriebs- und Reparaturverfahren |
DE19638237A1 (de) * | 1996-09-19 | 1998-03-26 | Deutz Ag | Verschleißfeste Oberflächenpanzerung für die Walzen von Hochdruck-Walzenpressen zur Druckzerkleinerung körnigen Gutes |
DE10335115A1 (de) * | 2003-07-31 | 2005-02-24 | Polysius Ag | Mahlwalze |
US7363707B2 (en) * | 2004-06-14 | 2008-04-29 | General Electric Company | Braze repair of shroud block seal teeth in a gas turbine engine |
DE102007012102A1 (de) * | 2007-03-13 | 2008-09-18 | Polysius Ag | Verfahren zur Wiederaufarbeitung einer gebrauchten Mahlwalze |
DE102007018090A1 (de) * | 2007-04-17 | 2008-10-23 | Polysius Ag | Mahlwalze sowie Verfahren zur Wiederaufarbeitung |
-
2006
- 2006-06-21 DE DE102006028546A patent/DE102006028546A1/de not_active Withdrawn
-
2007
- 2007-05-23 WO PCT/EP2007/004597 patent/WO2007147474A1/de active Application Filing
- 2007-05-23 CA CA2643959A patent/CA2643959C/en active Active
- 2007-05-23 BR BRPI0708406A patent/BRPI0708406A8/pt not_active Application Discontinuation
- 2007-05-23 US US12/305,510 patent/US20090178280A1/en not_active Abandoned
- 2007-05-23 DK DK07725497.7T patent/DK1899071T3/da active
- 2007-05-23 RU RU2008142420/21A patent/RU2427426C2/ru active
- 2007-05-23 AU AU2007263387A patent/AU2007263387B2/en active Active
- 2007-05-23 EP EP07725497A patent/EP1899071B1/de active Active
- 2007-05-23 DE DE502007004541T patent/DE502007004541D1/de active Active
- 2007-06-13 PE PE2007000744A patent/PE20080623A1/es active IP Right Grant
-
2008
- 2008-07-18 ZA ZA200806297A patent/ZA200806297B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE502007004541D1 (de) | 2010-09-09 |
US20090178280A1 (en) | 2009-07-16 |
RU2008142420A (ru) | 2010-04-27 |
WO2007147474A1 (de) | 2007-12-27 |
AU2007263387A1 (en) | 2007-12-27 |
CA2643959C (en) | 2014-07-08 |
ZA200806297B (en) | 2009-10-28 |
PE20080623A1 (es) | 2008-05-14 |
AU2007263387B2 (en) | 2010-11-04 |
DK1899071T3 (da) | 2010-11-01 |
DE102006028546A1 (de) | 2007-12-27 |
BRPI0708406A8 (pt) | 2015-04-28 |
RU2427426C2 (ru) | 2011-08-27 |
CA2643959A1 (en) | 2007-12-27 |
BRPI0708406A2 (pt) | 2011-05-31 |
EP1899071A1 (de) | 2008-03-19 |
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