WO2020159505A1 - Method and apparatus for extending the campaign life of stabilizers for a coating line - Google Patents
Method and apparatus for extending the campaign life of stabilizers for a coating line Download PDFInfo
- Publication number
- WO2020159505A1 WO2020159505A1 PCT/US2019/015959 US2019015959W WO2020159505A1 WO 2020159505 A1 WO2020159505 A1 WO 2020159505A1 US 2019015959 W US2019015959 W US 2019015959W WO 2020159505 A1 WO2020159505 A1 WO 2020159505A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- journal
- roller
- roller sleeve
- bearing block
- sleeve
- Prior art date
Links
- 238000000576 coating method Methods 0.000 title claims description 36
- 239000011248 coating agent Substances 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 20
- 239000003381 stabilizer Substances 0.000 title description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 71
- 239000010959 steel Substances 0.000 claims abstract description 71
- 239000000919 ceramic Substances 0.000 claims abstract description 55
- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
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- 229910010293 ceramic material Inorganic materials 0.000 claims description 23
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 22
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 21
- 239000011819 refractory material Substances 0.000 abstract description 19
- 238000012545 processing Methods 0.000 abstract description 8
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- 238000005269 aluminizing Methods 0.000 description 9
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 230000008878 coupling Effects 0.000 description 5
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
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- 229910052725 zinc Inorganic materials 0.000 description 2
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/02—Bearings
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0034—Details related to elements immersed in bath
- C23C2/00342—Moving elements, e.g. pumps or mixers
- C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0035—Means for continuously moving substrate through, into or out of the bath
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
- C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
- C23C2/004—Snouts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
Definitions
- Coating is a common process used in steel making to provide a thin metal coating
- the coating process may be generally incorporated into a continuous coating line where an elongated steel sheet is threaded through a series of roll assemblies to subject the steel sheet to various treatment processes. During the coating portion of this process, the steel sheet is manipulated through a bath of molten metal to coat the surfaces of the steel sheet.
- roller sleeves made of ceramic or refractory material are mechanically locked to a roller journal, thereby providing protection from wear.
- roller inserts made of ceramic or refractory materials are applied to an exterior surface of a roller journal to protect against wear.
- Ceramic or refractory materials provide superior resistance to abrasion and chemical attack encountered in environments surrounded by molten metal.
- challenges have been encountered with integrating ceramic or refractory materials into roller assemblies submerged in molten metal.
- the present application relates to structures and/or methods for incorporating ceramic or refractory materials into roller assemblies between a journal and a bearing block.
- FIGURE 1 depicts a schematic view of a coating portion of a continuous steel
- FIGURE 1 A depicts a schematic view of an alternative configuration for the coating portion of FIGURE 1.
- FIGURE 2 depicts a perspective view of a roll assembly that may be readily
- FIGURE 3 depicts a perspective view of a bearing block of the roll assembly of
- FIGURE 2 is a diagrammatic representation of FIGURE 1
- FIGURE 4 depicts a front elevational view of a roll of the roll assembly of FIGURE
- FIGURE 5 depicts perspective view of a roller sleeve of the roll assembly of
- FIGURE 2 is a diagrammatic representation of FIGURE 1
- FIGURE 6 depicts another perspective view of the roller sleeve of FIGURE 5.
- FIGURE 7 depicts a partial front cross-sectional view of a coupling between the roll of FIGURE 4 and the roller sleeve of FIGURE 5.
- FIGURE 8 depicts a side cross-sectional view of an alternative journal and roller sleeve that may be readily incorporated into the stab roll of FIGURE 4.
- FIGURE 9 depicts a perspective view of the journal and roller sleeve of FIGURE 8.
- FIGURE 10 depicts a perspective view of another alternative journal that may be readily incorporated into the roll of FIGURE 4.
- FIGURE 11 depicts a perspective view of still another alternative journal that may be readily incorporated into the roll of FIGURE 4.
- FIGURE 12 depicts a perspective view of another roll assembly that may be readily incorporated into the coating portion of FIGURE 1.
- FIGURE 13 depicts a perspective view of a bearing block of the roll assembly of
- FIGURE 14 depicts a front elevational view of a roll of the roll assembly of FIGURE
- FIGURE 15 depicts a perspective view of a roller sleeve of the roll assembly of
- FIGURE 16 depicts a front view of the roller sleeve of FIGURE 15.
- FIGURE 17 depicts a cross-sectional view of the roller sleeve of FIGURE 15 taken along line 17-17 of FIGURE 16.
- FIGURE 18 depicts a partial front cross-sectional view of a coupling between the roll of FIGURE 14 and the roller sleeve of FIGURE 15.
- FIGURE 19 depicts a perspective view of another roller sleeve that may be readily incorporated into the roll assembly of FIGURE 12.
- FIGURE 20 depicts a front view of the roller sleeve of FIGURE 19.
- FIGURE 21 depicts a top elevational view of the roller sleeve of FIGURE 19.
- FIGURE 22 depicts a cross-sectional view of the roller sleeve of FIGURE 19 taken along line 22-22 of FIGURE 20.
- FIGURE 23 depicts a front view of the roller sleeve of FIGURE 19 assembled with a journal.
- the present application generally relates to structures and/or methods for
- incorporating ceramic or refractory materials within a roll assembly submerged within molten metal involves incorporating ceramic or refractory material between a journal and a bearing block.
- the presence of the ceramic or refractory material reduces wear on the journal that may result through rotation of the journal relative to the bearing block.
- the presence of the ceramic or refractory material may also reduce the propensity of the journal to be subject to chemical attack from the molten metal.
- FIG. 1 shows a schematic cross-sectional representation of a coating portion (10) of a steel processing line (2), such as a continuous steel processing line.
- steel sheet (60) may be subjected to a variety of other steel processing operations in other portions of steel processing line (2).
- steel sheet (60) may be subjected to hot or cold reduction rolling, various heat treatments, pickling, and/or etc.
- other steel processing operations may be eliminated such that coating portion (10) is configured as a standalone coating line in some examples.
- coating portion (10) includes a hot dip tank (20), a snout (30), one or more roll assemblies (40, 50, 70).
- coating portion (10) is generally configured to receive an elongate steel sheet (60) for coating steel sheet (60).
- Hot dip tank (20) is defined by a solid wall configured to receive molten metal (22), such as aluminum, zinc, and/or alloys thereof.
- Snout (30) is configured to be partially submerged within molten metal (22). Accordingly, snout (30) generally provides an air tight seal around steel sheet (60) during entry into molten metal (22).
- snout (30) is filled with a protective or reducing gas such as hydrogen and/or nitrogen to limit chemical oxidation reactions that may occur during entry of steel sheet (60) into molten metal (22).
- One or more roll assemblies (40, 50, 70) are positioned relative to hot dip tank (20) to support steel sheet (60) through coating portion (10).
- a pot or sink roll assembly (70) may be submerged within molten metal (22) such that pot roll assembly (70) is generally configured to rotate and thereby redirect steel sheet (60) out of hot dip tank (20).
- One or more stabilizer and correcting roll assemblies (40) may then be positioned relative to hot dip tank (20) to stabilize steel sheet (60) as steel sheet (60) exits molten metal (22).
- stabilizer and correcting roll assemblies (40) may be used to position steel sheet (60) as steel sheet (60) enters air knives (35).
- Stabilizer and correcting roll assemblies (40) may also be used to improve the shape of steel sheet (60).
- a deflector roll assembly (50) may then be generally configured to redirect steel sheet (60) to other portions of steel processing line (2) after steel sheet (60) has been coated. While coating portion (10) of the present example is shown with only one of each of a pot roll assembly (70), a stabilizer and correcting roll assembly (40), and a deflector roll assembly (50), in some other versions any suitable number of roll assemblies (40, 50, 70) may be used.
- FIG. 1A shows an alternative configuration of coating portion (10) with stabilizer and correcting roll assembly (40) omitted.
- the alternative configuration shown in FIG. 1 A includes two sink roll assemblies (42) disposed entirely within hot dip tank (20).
- Sink roll assemblies (42) generally operate similarly to other roll assemblies described herein.
- sink roll assemblies (42) are generally configured to manipulate steel sheet (60) through various portions of the coating process.
- sink roll assemblies (42) manipulate steel sheet (60) within molten metal (22) to promote complete coating of steel sheet (60).
- Sink roll assemblies (42) additionally provide for an increased amount of travel path through molten metal (22). This feature generally increases the time in which steel sheet (60) is disposed within molten metal (22). Once steel sheet (60) passes through sink roll assemblies (42), steel sheet (60) may then be redirected in a desired direction by pot roll assembly (70) and deflector roll assembly (50).
- FIGS. 1 and 1 A both illustrate discrete configurations for coating portion (10), in other examples coating portion (10) includes other alternative configurations that combine various elements from the configurations shown in FIGS. 1 and 1 A.
- a roll assembly incorporating a roller sleeve comprising refractory ceramic materials is discussed in more detail below. Because such a roller sleeve may reduce wear, corrosion, and/or abrasion of the roll assembly, it should be understood that such a roller sleeve may be incorporated into any one or more roll assemblies in a continuous coating line.
- These roll assemblies may include, but are not limited to, any stabilizing and correcting roll assemblies (40), sink roll assemblies (42), deflector roll assemblies (50), and/or pot roll assemblies (70) as described above.
- roll assembly (100) comprises two bearing blocks (72), a roll
- each bearing block (72) is generally configured to receive at least a portion of roll (80) to promote rotation of roll (80) relative to bearing block (72).
- each bearing block (72) is generally coupled to a fixture or other structure to hold each bearing block (72) in position within hot dip tank (20).
- bearing block (72) is best seen in FIG. 3.
- bearing block (72) includes a generally octagonal body (74).
- the octagonal shape of body (74) is generally configured to provide surfaces by which a fixture or other structure can attach to bearing block (72) to position bearing block (72) within hot dip tank (20).
- body (72) of the present example is shown with octagonal structure, it should be understood that in other examples other suitable structures may be used such as square, hexagonal, triangular, circular, etc.
- body (74) defines a receiving bore (76) through the center of bearing block (72).
- Receiving bore (76) is generally defined by a cylindrical shape. As will be described in greater detail below, receiving bore (76) is configured to receive roller sleeve (90) and at least a portion of roll (80) to permit roller sleeve (90) to freely rotate within bore (76).
- Bearing block (72) comprises a ceramic material that has high strength and is
- suitable ceramic materials may include a class of ceramics known as SiAlON ceramics.
- SiAlON ceramics are high-temperature refractory materials that may be used in handling molten aluminum.
- SiAlON ceramics generally exhibit good thermal shock resistance, high strength at high temperatures, exceptional resistance to wetting by molten aluminum, and high corrosion resistance in the presence of molten non-ferrous metals.
- Bearing block (72) of the present example comprises CRYSTON CN178 manufactured by Saint-Gobain High-Performance Refractories, although numerous SiAlON class ceramics may be used.
- Roll (80) is shown in FIG. 4.
- roll (80) includes a roll portion (82) and a journal (86) extending from each side of roll portion (82).
- roll portion (82) and journal (86) comprise steel or another metallic alloy.
- Roll portion (82) comprises a generally elongate cylindrical shape.
- the cylindrical shape of roll portion (82) is generally configured to receive steel sheet (60) to permit at least a portion of steel sheet (60) to wrap around at least a portion of roll portion (82).
- a width of roll portion (82) generally corresponds to the width of steel sheet (60) such that the width of roll portion (82) is wider than steel sheet (60). This may compensate for strip tracking through coating portion (10).
- each journal (86) extends outwardly from roll portion (82).
- Each journal (86) comprises a generally cylindrical shape with an outer diameter that is less than the outer diameter defined by roll portion (82).
- Each journal (86) is sized to be received by bore (76) of a respective bearing block (72).
- each journal (86) is generally undersized relative to bore (76) of bearing block (72) to permit space for roller sleeve (90) disposed between bearing bock (72) and journal (86).
- each journal (86) further includes threading (88) disposed on the outer surface of each journal (86).
- threading (88) is generally configured to engage corresponding features of each respective roller sleeve (90) to couple each roller sleeve (90) to each journal (86).
- threading (88) on each journal (86) is oriented to account for rotation of stab roll (80). For instance, if one journal (86) includes right hand threading, the opposite journal (86) includes left hand threading.
- threading (88) prevents each roller sleeve (90) from becoming loose or otherwise unscrewing as stab roll (80) is rotated by friction between steel sheet (60) and roll portion (82).
- threading (88) may include rounded peaks to accommodate variation in the internal geometry of roller sleeve (90) as will be described in greater detail below.
- roller sleeve (90) is shown in FIGS. 5 and 6.
- Roller sleeve (90) is generally configured to provide a durable non-reactive barrier between a respective journal (86) and a respective bearing block (72).
- roller sleeve (90) generally rotates with journal (86) such that roller sleeve (90) rotates within bearing block (72) relative to bearing block (72).
- a portion of an exterior surface of each roller sleeve (90) is in direct contact with a portion of an interior surface of bore (76) of bearing block (72).
- Roller sleeve (90) may thereby form a plan bearing with each journal (86) without the use of rollers or rolling bodies.
- Each journal (86) and roller sleeve (90) may thereby rotate together within a stationary bearing block (72).
- roller sleeve (90) comprises a generally cylindrical body (92).
- body (92) includes a chamfered or beveled edge (94).
- Edge (94) is generally configured to abut an interface between a respective journal (86) and roll portion (82).
- edge (94) is shown has having a generally chamfered or beveled shape, it should be understood that any other suitable shape may be used such as a fillet shape, a squared shape, a j -groove, or etc.
- Body (92) defines a cylindrical bore (96) extending through roller sleeve (90).
- the interior of bore (96) includes threading (98) extending at least partially though the length of bore (96).
- Threading (98) is generally configured to engage threading (88) on the outer diameter of a respective journal (86).
- threading within bore (96) is configured to mechanically fasten roller sleeve (90) to a respective journal (86).
- the inner diameter of bore (96) generally corresponds to the outer diameter of each journal (86). However, as best seen in FIG. 7, the present example includes a predetermined clearance (d) between the inner diameter of bore (96) and the outer diameter of journal (86). Initially, it was theorized that this clearance (d) could be derived from the difference between the thermal expansion ratio of journal (86) and the thermal expansion ratio of roller sleeve (90) such that once both journal (86) and roller sleeve (90) approach the temperature of dip tank (20), this clearance (d) would be substantially eliminated.
- the clearance (d) between bore (96) and journal (86) is unexpectedly not exclusively tied to the thermal expansion ratios of journal (86) and roller sleeve (90).
- some clearance (d) between journal (86) and roller sleeve (90) at temperature of hot dip tank (20) is beneficial to improving the durability of roller sleeve (90) during the aluminizing procedure.
- at least some clearance (d) is maintained between the inner diameter of bore (96) and the outer diameter of journal (86) throughout the aluminizing procedure.
- a suitable clearance (d) may be approximately 0.220 in.
- clearance (d) may be between about 0.220 and 0.200 in.
- the width of threading (88) may also provide some width clearance. In these examples, this width clearance may vary between approximately 0.005 in. and approximately 0.030 in.
- the clearance (d) between the inner diameter of bore (96) and the outer diameter of journal (86) referred to above is described as being beneficial for improving the durability of roller sleeve (90), it should be understood that this clearance (d) is also limited in the present example. For instance, if the clearance (d) between the inner diameter of bore (96) and the outer diameter of journal (86) is too significant, some wetting of the molten aluminum (22) may occur, thereby transporting molten aluminum (22) into the clearance (d) between the inner diameter of bore (96) and the outer diameter of journal (86).
- Roller sleeve (90) comprises a ceramic material that has high strength and is resistant to wear at high temperature.
- This ceramic material additionally may have a low coefficient of thermal expansion, resistance to thermal shock, resistance to wetting by molten metal, resistance to corrosion, and is substantially chemically inert to molten metals.
- suitable ceramic materials may include a class of ceramics known as SiAlON ceramics. As described above, SiAlON ceramics are high-temperature refractory materials that may be used in handling molten aluminum. SiAlON ceramics generally exhibit good thermal shock resistance, high strength at high temperatures, exceptional resistance to wetting by molten aluminum, and high corrosion resistance in the presence of molten non-ferrous metals.
- Roller sleeve (90) of the present example comprises ADVANCER® nitride bonded silicon carbide manufactured by Saint-Gobain Ceramics, although numerous SiAlON-class ceramics may be used.
- steel sheet (60) is wrapped about roll assembly (100). Friction between steel sheet (60) and roll portion (82) of roll (80) causes roll (80) to rotate as steel sheet (60) moves relative to roll assembly (100). Rotation of roll (80) causes corresponding rotation of each journal (86), which also causes rotation of each roller sleeve (90) via engagement between threading (88, 98).
- each roller sleeve (90) stays secured to each respective journal (86) due to the rotation of each journal (86). It should be understood that in some examples only a portion of threading (88) of journal (86) may contact threading (98) of roller sleeve (90) at a given time. For instance, during operation, steel sheet (60) may pull roll (80) in a particular direction. This will cause journal (86) to move laterally within roller sleeve (90) due to clearance such that journal (86) and roller sleeve (90) are not precisely coaxially aligned.
- each journal (86) and each roller sleeve (90) rotate together within a respective bearing block (72), while each bearing block (72) secures the axial position of roll (80). Still other suitable configurations for roller sleeve (90) and/or roll assembly (100) will be apparent to one with ordinary skill in the art in view of the teachings herein.
- FIGS. 8 and 9 show an exemplary alternative journal (186) and roller sleeve (190) that may be readily incorporated into roll assembly (100) described above.
- journal (186) and roller sleeve (190) are respectively substantially similar to journals (86) and roller sleeves (90) described above.
- Journal (186) of the present example comprises a generally square lateral cross-section. As will be described in greater detail below, this generally square shape permits journal (186) to engage roller sleeve (190) and thereby induce rotation of roller sleeve (190) relative to a respective bearing block (72). As will be understood, this configuration permits structures similar to threading (88) of journal (86) to be omitted from journal (186).
- Roller sleeve (190) comprises a cylindrical body (192) that is generally configured to fit over journal (186).
- Body (192) defines a bore (196) extending entirely through roller sleeve (190).
- Bore (196) of the present example defines a square-shaped lateral cross-section that generally corresponds to the shape of journal (186) described above.
- Bore (196) of the present example is generally sized to receive journal (186).
- bore (196) of the present example is generally sized to receive journal (186) it should be understood that in the present example, bore (196) is also sized to provide at least some clearance relative to the exterior of journal (186) as similarity described above with respect to roller sleeve (90) and journal (86).
- the clearance associated with roller sleeve (90) and journal (86) is generally configured to be maintained throughout the coating procedure despite expansion of roller sleeve (190) and/or journal (86) due to the heat encountered within hot dip tank (20).
- the clearance associated with roller sleeve (190) and journal (186) is also sized to minimize or prevent transport of molten metal (22) into the cavity defined by the clearance.
- journal (186) and bore (196) of roller sleeve (190) are generally configured to permit journal (186) to communicate rotary motion to roller sleeve (190).
- journal (186) and bore (196) of roller sleeve (190) define a corresponding triangular, ovular, or rectangular shape.
- both journal (186) and bore (196) of roller sleeve (190) define a generally cylindrical shape, but may also be keyed to still permit communication of rotation from journal (186) to roller sleeve (190).
- FIG. 10 shows an alternative journal (286) that may be readily incorporated into roll assembly (100) described above. Unlike journal (86) described abovejoumal (286) of the present example is not configured for use with a structure similar to roller sleeve (90).
- Journal (86) integrates a series of cylindrical ceramic inserts (290) oriented longitudinally around the outer surface of journal (286).
- Journal (286) is machined to include a plurality of channels (not shown) that are configured to receive inserts (290).
- the channels in the outer surface of journal (286) are sized to accommodate only a portion of each insert (290) such that a portion of each inert (290) protrudes from the outer surface of journal (286).
- each inert (290) is configured to engage the interior of bearing block (72), thereby separating the outer surface of journal (286) from the interior of bearing block (72).
- Coupling between journal (286) and inserts (290) can be by any suitable means.
- inserts (290) are welded or bonded onto journal (286) by ultrasonic welding, friction welding, soldering, and/or other processes suitable for welding or bonding dissimilar materials.
- inserts (290) are secured to journal (286) by a mechanical fastener.
- the channels in journal (286) and inserts (290) may include complementary coupling features to provide a slide-in or snap fit.
- inserts (290) may be coupled to journal (286) by any other suitable means that will be apparent to those of ordinary skill in the art in view of the teachings herein.
- FIG. 11 illustrates an alternative journal (386) that may be readily incorporated into roll (80) of roll assembly (100).
- J oumal (386) itself comprises a ceramic material consistent with the properties described above with respect to roller sleeve (90).
- Journal (386) is removably couplable to roll portion (82) of roll (80) instead of being integral with roll portion (82).
- Journal (386) of the present example includes a roller plug
- journal (386) is mechanically locked to roll (80) by a series of pins or other mechanical fasteners.
- journal (80) can comprise a ceramic material, thus removing the need to separate journal (386) from roll portion (82).
- journal (286) may be apparent to those of ordinary skill in the art in view of the teachings herein.
- FIGS. 12-17 show an exemplary alternative roll assembly (470) that may be readily incorporated into the coating lines described above. It should be understood that unless otherwise noted herein, roll assembly (470) is substantially similar to roll assembly (100) described above. As can be seen in FIG. 12, roll assembly (470) includes two bearing blocks (472), a roll (480), and a roller sleeve (490) disposed between each bearing bock (472) and roll (480). Each bearing block (472) is generally configured to receive at least a portion of roll (480) to promote rotation of roll (480) relative to bearing block (472). Although not shown, it should be understood that each bearing block (472) is generally coupled to a fixture or other structure to hold each bearing bock (472) in position within hot dip tank (20).
- bearing block (472) is best seen in FIG. 13.
- bearing block (472) includes a generally octagonal body (474).
- the octagonal shape of body (474) is generally configured to provide surfaces by which a fixture or other structure can attach to bearing block (472) to position bearing block (472) within hot dip tank (20).
- body (472) of the present example is shown with octagonal structure, it should be understood that in other examples other suitable structures may be used such as square, hexagonal, triangular, circular, etc.
- body (474) defines a receiving bore (476) through the center of bearing block (472).
- Receiving bore (476) is generally defined by a cylindrical shape.
- receiving bore (476) is configured to receive roller sleeve (490) and at least a portion of roll (480) to permit roller sleeve (490) to freely rotate within bore (476).
- roll (480) comprises a roll portion (482) and a journal (486) extending from each side of roll portion (482).
- roll portion (482) and journal (486) comprise steel or another metallic alloy.
- roll (480) may be formed from a composite or other suitable material.
- Roll portion (482) comprises a generally elongate cylindrical shape. The cylindrical shape of roll portion (482) is generally configured to receive steel sheet (60) to permit at least a portion of steel sheet (60) to wrap around at least a portion of roll portion (482).
- each journal (486) extends outwardly from roll portion (482).
- Each journal (486) comprises a generally cylindrical shape with an outer diameter that is less than the outer diameter defined by roll portion (482).
- each journal (486) comprises a substantially continuous smooth outer surface such that the outer surface of each journal (486) is free from a mechanical locking feature to maintain a substantially circular profile about the outer
- each journal (486) is sized to be received by bore (476) of a respective bearing block (472).
- each journal (486) is generally undersized relative to bore (476) of bearing block (472) to permit space for roller sleeve (490) disposed between bearing bock (472) and journal (486).
- roller sleeve (490) is shown in FIGS. 15-17.
- Roller sleeve (490) is generally configured to provide a durable non-reactive barrier between a respective journal (486) and a respective bearing bock (472).
- roller sleeve (490) comprises a generally cylindrical body (492) defining a cylindrical bore (496) extending through roller sleeve (490).
- the interior of bore (496) of the present embodiment comprises a substantially continuous smooth interior surface such that the inner surface of each bore (496) is free from a mechanical locking feature to maintain a substantially circular profile about the inner circumference of each bore (496) along the length of each bore (496).
- a smooth inner surface of bore (496) may thereby be more cost effective to manufacture than a bore including a locking feature.
- the inner diameter of bore (496) generally corresponds to the outer diameter of each journal (486) as will be discussed further below in more detail.
- roller sleeve (490) is positioned about journal (486) such that journal (486) is received within bore (496) of roller sleeve (490).
- the fit between each journal (486) and corresponding bore (496) and the weight of each journal (486) causes roller sleeve (490) to generally rotate simultaneously with journal (486) even though journal (486) and roller sleeve (490) are not mechanically coupled with a locking mechanism. This allows roller sleeve (490) to rotate within bearing block (472) relative to bearing block (472) to prevent wear to journal (486).
- At least one side of body (492) of roller sleeve (490) may include a chamfered or beveled edge (494).
- Edge (494) is generally configured to abut an interface between a respective journal (486) and roll portion (482).
- edge (494) is shown has having a generally chamfered or beveled shape, it should be understood that any other suitable shape may be used such as a fillet shape, a squared shape, a j -groove, or etc.
- Bearing block (472) and roller sleeve (490) may be made from ceramic.
- bearing block (472) and roller sleeve (490) may each comprise a refractory ceramic material having impact, abrasion, and/or thermal shock resistance.
- a refractory material may comprise silicon carbide (SiC), alumina (AI2O3), fused silica (S1O2), or combinations thereof.
- the refractory ceramic material comprises between about 5% and about 100% silicon carbide and/or alumina.
- suitable refractory ceramic materials may include a class of ceramics known as SiAlON ceramics.
- SiAlON ceramics are high-temperature refractory materials that may be used in handling molten metal. SiAlON ceramics generally exhibit good thermal shock resistance, high strength at high temperatures, exceptional resistance to wetting by molten aluminum, and high corrosion resistance in the presence of molten metals.
- Such a SiAlON ceramic may comprise CRYSTON CN178 manufactured by Saint-Gobain High-Performance Refractories of Worcester, Massachusetts, although numerous SiAlON class ceramics may be used.
- Suitable refractory ceramic materials may include a ceramic having about 73%
- This ceramic may comprise GemStone® 404A manufactured by Wahl Refractory Solutions of Fremont, Ohio.
- a harder ceramic having a greater amount of SiC, such as about 70% SiC may be used.
- stainless steel wire needles may be added to the ceramic material, such as about 0.5% to about 30% by weight of the material.
- Such a ceramic may comprise ADVANCER® nitride bonded silicon carbide manufactured by Saint-Gobain Ceramics of Worcester, Massachusetts or Hexology® silicon carbide also manufactured by Saint-Gobain Ceramics of Worcester,
- Each bearing block (472) and/or roller sleeve (490) may be made by casting the refractory ceramic material.
- bearing block (472) and/or roller sleeve (490) may be made by pouring liquid ceramic into a mold and using heat to bake the ceramic to remove moisture. An outer surface of the bearing block (472) and/or roller sleeve (490) may then be grinded to provide a smooth outer surface. Still other suitable methods for making the components of roll assembly (480) will be apparent to one with ordinary skill in the art in view of the teachings herein.
- bearing blocks (472) and roller sleeve (490) may be made from the same refractory material or from different refractory materials.
- bearing block (472) comprises a castable ceramic having about 73% AI2O3 and about 8% SiC, such as GemStone® 404A, while roller sleeve (490) may comprise a harder ceramic having a greater amount of SiC, such as about 70% SiC.
- Such a ceramic may comprise ADVANCER® nitride bonded silicon carbide. This may allow bearing block (472) to wear before roller sleeve (490). This may be desirable because it may be more cost effective to replace bearing block (472) relative to roller sleeve (490).
- bearing block (472) may comprise ADVANCER® ceramic and/or roller sleeve may comprise GemStone® 404A ceramic.
- roller sleeve (490) may be positioned between a journal (486) and a bearing block (472) to provide a durable non-reactive barrier between the respective journal (486) and the respective bearing bock (472).
- the present example includes a predetermined clearance (d) between the inner diameter of bore (496) and the outer diameter of journal (486). Initially, it was theorized that this clearance (d) could be derived from the difference between the thermal expansion ratio of journal (486) and the thermal expansion ratio of roller sleeve (490) such that once both journal (486) and roller sleeve (490) approach the temperature of dip tank (20), this clearance (d) would be substantially eliminated.
- the clearance (d) between bore (496) and journal (486) is unexpectedly not exclusively tied to the thermal expansion ratios of journal (486) and roller sleeve (490).
- some clearance (d) between journal (486) and roller sleeve (490) at the temperature of hot dip tank (20) is beneficial to improving the durability of roller sleeve (490) during the coating procedure.
- at least some clearance (d) may be maintained between the inner diameter of bore (496) and the outer diameter of journal (486) throughout the coating procedure.
- the clearance (d) between the inner diameter of bore (496) and the outer diameter of journal (486) referred to above is described as being beneficial for improving the durability of roller sleeve (490), it should be understood that this clearance (d) is also limited in the present example. For instance, if the clearance (d) between the inner diameter of bore (496) and the outer diameter of journal (486) is too significant, some wetting of the molten aluminum (22) may occur, thereby transporting molten metal (22) into the clearance (d) between the inner diameter of bore (496) and the outer diameter of journal (486).
- the clearance (d) between the inner diameter of bore (496) and the outer diameter of journal (486) is limited so as to minimize or prevent transport of molten metal (22) into the clearance (d).
- the clearance (d) between bore (496) and journal (486) may also be limited to prevent slipping between roller sleeve (490) and journal (486) when roll (480) is rotated by friction between steel sheet (60) and roll portion (482).
- the inner diameter of bore (496) of roller sleeve (490) is sized corresponding to the outer diameter of journal (486) to provide a clearance fit between journal (486) and roller sleeve (490).
- a clearance fit may have a minimum clearance (d) sufficient to prevent cracking of roller sleeve (490) upon thermal expansion of journal (486) and a maximum clearance (d) to prevent transport of molten metal (22) into the clearance (d) and/or to prevent slipping between roller sleeve (490) and journal (486).
- a suitable clearance (d) at operating temperature may be between about 0.001 inches and 0.012 inches.
- steel sheet (60) is wrapped about roll assembly (470). Friction between steel sheet (60) and roll portion (482) of roll (480) causes roll (480) to rotate as steel sheet (60) moves relative to roll assembly (470). Rotation of roll (480) causes corresponding rotation of each journal (486), which also causes rotation of each roller sleeve (490) via engagement between the substantially continuous smooth inner surface of bore (496) of roller sleeve (490) and the substantially continuous smooth outer surface of journal (486).
- roller sleeve (490) Due to fit between each journal (486) and corresponding bore (496) and the weight of each journal (486), roller sleeve (490) generally rotates simultaneously with journal (486) even though journal (486) and roller sleeve (490) are not mechanically coupled with a locking mechanism. Still other suitable configurations for roller sleeve (490) and/or roll assembly (470) will be apparent to one with ordinary skill in the art in view of the teachings herein.
- FIGS. 19-22 show another embodiment of a roller sleeve (590) that is similar to roller sleeve (490), except that roller sleeve (590) comprises a pair of notches (598) extending inwardly from a top and bottom portion of an end of roller sleeve (590). While the illustrated embodiment shows roller sleeve (590) comprising two notches (598) at a top and bottom portion of roller sleeve (590), roller sleeve (590) may comprise any suitable number of notches (598) positioned at any suitable position about roller sleeve (590). Accordingly, roller sleeve (590) may be assembled with a journal (586), as shown in FIG.
- roller sleeve (590) is positioned about journal (586) with notches (598) at the free end of journal (586).
- a bar (599) may then be inserted within notches (598) of roller sleeve (590) along the free end of roller sleeve (590).
- Bar (599) may be fastened with the free end of journal (586) to thereby mechanically couple journal (586) with roller sleeve (590) via bar (599).
- journal (86) In an initial test, a structure similar to journal (86) described above was tested to establish a measured coefficient of thermal expansion of the journal.
- the tested journal was prepared as a mockup portion of stab roll such that the journal consisted of the journal attached to a hub corresponding to an end of stab roll. While the journal was at room temperature (e.g., approximately 70° F), measurements were acquired of all surfaces such as the outer diameter of the journal, the thread peaks, and the roots of the threads. The journal was subsequently heated to a temperature of 1,350° F. Immediately after heating, the same measurements were taken while the journal was in the heated condition. Measurements taken at room temperature were compared against measurements taken while the journal was in the heated condition.
- journal Prior to testing, machining was performed on the journal.
- the journal was machined to adjust the clearance to at least 0.042” between the inner diameter of the roller sleeve and the outer diameter of the journal. This clearance was set to provide an approximate size-to-size fit between the journal and the roller sleeve at high temperature (e.g., 1,150° F).
- the roller sleeve and the journal were mated. After mating, it was observed that due to the out of round character of the roller sleeve, little to no clearance was present in some localized areas around the outer diameter of the journal. To improve the clearance and to provide an overall loose fit, the roller sleeve was unscrewed from the journal approximate 1 ⁇ 4 turn. In this configuration, the roller sleeve and the journal were then subject to a furnace based heat treatment. [0082] The heat treatment included heating the roller sleeve and the journal as mated to 1,150° F in 150° F per hour intervals. The assembly of the roller sleeve and the journal was removed from the furnace at 500° and 900° F to observe the clearance.
- a stab roll assembly similar to stab roll assembly (70) described above was prepared.
- the stab roll assembly included two journals.
- the two journals were prepared such that one journal was configured as a control journal and another journal was configured as a test journal.
- the control journal was prepared in accordance with standard practices such that a metal journal to bearing block configuration was formed via control journal.
- the test journal was prepared as similarly described above with respect to journal (86) and included a roller sleeve similar to roller sleeve (90) described above.
- test journal and corresponding roller sleeve were both configured to provide a maximum clearance of 0.220” between the test journal and corresponding roller sleeve. It was hypothesized that a size-to-size fit between the journal and the roller sleeve during operation at temperature was not necessary and could be detrimental. Instead, it was hypothesized that force exerted upon the stab roll during operation would only require a single side of the threads of the journal to engage the threads of the roller sleeve. In other words, only 1 ⁇ 2 engagement of the threads was to be required in total because full engagement might occur on one side of the journal and limited engagement might occur on the other side of the journal.
- test journal and corresponding roller sleeve were both configured to provide a max clearance of 0.220 in. Prior to test initiation a portion of the roller sleeve was chipped. Thus, the roller sleeve only partially covered the test journal throughout the test.
- the stab roll assembly was then inserted into a molten aluminum bath for use in aluminizing steel sheet.
- a total of 583,521 ft. of steel sheet was processed with the stab roll assembly in service.
- fracture on the exterior of the bearing block was visible.
- the bearing block separated into four separate parts.
- each fracture surface was completely coated with aluminum metal. This coating pattern suggested that fracture of the bearing block occurred during service rather than during cooling via thermal shock.
- a large void was present in two mating fracture surfaces.
- the cracking of the bearing block was determined to be unrelated to the use of the roller sleeve and test journal combination.
- the roller sleeve exhibited limited visible wear as indicated by no grooving and generally limited loss of thickness.
- the portion of the roller sleeve that was chipped prior to testing exhibited some increase in chipped area. However, the chipping did not spread along the length of the roller sleeve and did not affect the roller sleeve serviceability.
- the roller sleeve In comparison to the control journal, the roller sleeve exhibited generally less wear, with the control journal exhibiting more typical wear.
- the wear rate of the roller sleeve was decreased substantially in comparison to the wear rate of the control journal based on comparisons between inner diameter measurements of the bearing blocks (before and after testing), the outer diameter of the control journal, and general observations with respect to wear appearance.
- journal has been prepared to provide a clearance of 0.220 in. +0 in./0.005 in. when coupled to a roller sleeve similar to roller sleeve (90) described above.
- the threads on the journal were machined to provide rounded peaks to better accommodate irregular inner diameter geometry provided by the roller sleeve.
- Measurements of lateral movement between the journal and the roller sleeve have been acquired. This measurement resulted in 0.020 in. to 0.040 in. lateral movement with as much as 0.060 in. to 0.155 in. considered to be acceptable.
- the roll assembly included two journals, each having a roller sleeve similar to roller sleeve (490) described above.
- the roller sleeve was made from ADVANCER® material and the bearing block was made from GemStone® 404A material.
- Each journal and corresponding roller sleeve were both configured to provide a maximum clearance of 0.040” between the journal and corresponding roller sleeve at the hot dip tank temperature.
- the roll assembly was then preheated and inserted into a molten aluminum bath for use in aluminizing steel sheet for a period of 5 days 12 hours and ran 1.9 MM feet of steel. Upon removal of the stab roll assembly, it was found that the journals spun within the corresponding roller sleeves indicating that there was too much clearance between the journal and roller sleeve.
- the roll assembly included two journals, each having a roller sleeve similar to roller sleeve (490) described above.
- the roller sleeve was made from ADVANCER® material and the bearing block was made from GemStone® 404A material.
- Each journal and corresponding roller sleeve were both configured to provide a maximum clearance of 0.006” between the journal and corresponding roller sleeve at operating temperature.
- the roll assembly was then preheated and inserted into a molten aluminum bath for use in aluminizing steel sheet. A total of 733,895 ft. of steel sheet was processed with the roll assembly in service.
- a roll assembly similar to roll assembly (470) described above was prepared to perform another in situ trial. Like with roll assembly (470), the roll assembly included two journals, each having a roller sleeve similar to roller sleeve (490) described above. In the trial, the roller sleeve was made from ADVANCER® material and the bearing block was made from GemStone® 404A material. Each journal and corresponding roller sleeve were both configured to provide a maximum clearance of 0.004 inches between the journal and corresponding roller sleeve at operating temperature. The roll assembly was then preheated and inserted into a molten aluminum bath for use in aluminizing steel sheet for a period of 7 days and ran 3 MM feet of steel. The trial was considered to be successful.
- a roll assembly similar to roll assembly (470) described above was prepared to perform another in situ trial. Like with roll assembly (470), the roll assembly included two journals, each having a roller sleeve similar to roller sleeve (490) described above. In the trial, the roller sleeve was made from ADVANCER® material and the bearing block was made from GemStone® 404A material. Each journal and corresponding roller sleeve were both configured to provide a maximum clearance of 0.004 inches between the journal and corresponding roller sleeve at operating temperature. The roll assembly was then preheated and inserted into a molten aluminum bath for use in aluminizing steel sheet for a period of 7 days and ran 3 MM feet of steel. Upon removal of the roll assembly, one of the roller sleeves was in good condition with a loss of diameter of about 0.021 in. The trial was considered to be successful.
- a roll assembly similar to roll assembly (470) described above was prepared to perform another in situ trial. Like with roll assembly (470), the roll assembly included two journals, each having a roller sleeve similar to roller sleeve (490) described above. In the trial, the roller sleeve was made from ADVANCER® material and the bearing block was made from GemStone® 404A material. Each journal and corresponding roller sleeve were both configured to provide a maximum clearance of 0.004 inches between the journal and corresponding roller sleeve at operating temperature. The roll assembly was then preheated and inserted into a molten aluminum bath for use in aluminizing steel sheet for a period of 4 days and 23.5 hours and ran 2.3 MM feet of steel.
- roller sleeve was made from ADVANCER® material and the journal was made from steel.
- the roller sleeve and journal were then heated to 1300°F at a heat rate less than 100°F per hour. After four hours of soak time, the roller sleeve was visually inspected to determine that there were no cracks in the roller sleeve.
- the roller sleeve and journal where then heated to 1350°F with a soak time of 2 hours. The roller sleeve was visually inspected to determine that there were no cracks in the roller sleeve.
- a roller assembly wherein the roller assembly is configured for submersion in
- the roller assembly comprises: (a) a roller comprising a roll portion and at least one journal extending axially from the roll portion, wherein the at least one journal is substantially cylindrical; (b) a roller sleeve comprising a bore extending through the roller sleeve, wherein the roller sleeve is substantially cylindrical, wherein the roller sleeve is positioned about the journal; and (c) a bearing block defining an opening therein, wherein the roller sleeve is disposed
- a roller assembly wherein the roller assembly is configured for submersion in
- the roller assembly comprises: (a) a roller comprising a roll portion and two journals protruding from opposite ends of the roll portion, wherein each journal comprises a substantially continuous smooth outer surface; (b) a pair of roller sleeves, wherein each roller sleeve comprises a bore extending through the roller sleeve configured to receive a corresponding journal therein, wherein the bore of each roller sleeve comprises a substantially continuous smooth inner surface; and (c) a pair of bearing blocks, wherein each bearing block defines an opening therein, wherein the opening of each bearing block is configured to receive a corresponding roller sleeve with a corresponding journal disposed within the roller sleeve.
- each roller sleeve is sized to provide a clearance between the inner surface of the bore and the outer surface of the corresponding j oumal .
- each roller sleeve is ceramic
- each roller sleeve comprises a greater amount of silicon carbide than each bearing block.
- a method of operating a roller assembly in a steel coating line comprising the steps of: positioning a journal of a roller within a bore of a ceramic roller sleeve, wherein an outer surface of the journal is substantially smooth, wherein an inner surface of the bore of the roller sleeve is substantially smooth; positioning the roller sleeve within an opening of a ceramic bearing block; and rotating the journal and roller sleeve together within the bearing block.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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KR1020217027523A KR20210120077A (en) | 2019-01-31 | 2019-01-31 | Method and apparatus for extending the service life of ballasts for coating lines |
CN201980090919.5A CN113383104A (en) | 2019-01-31 | 2019-01-31 | Method and device for extending the service life of a stabilizer of a coating line |
PCT/US2019/015959 WO2020159505A1 (en) | 2019-01-31 | 2019-01-31 | Method and apparatus for extending the campaign life of stabilizers for a coating line |
JP2021544283A JP7450628B2 (en) | 2019-01-31 | 2019-01-31 | Method and apparatus for extending the product life of stabilizers for coating lines |
CA3126387A CA3126387A1 (en) | 2019-01-31 | 2019-01-31 | Method and apparatus for extending the campaign life of stabilizers for a coating line |
EP19708909.7A EP3918103A1 (en) | 2019-01-31 | 2019-01-31 | Method and apparatus for extending the campaign life of stabilizers for a coating line |
MX2021009282A MX2021009282A (en) | 2019-01-31 | 2019-01-31 | Method and apparatus for extending the campaign life of stabilizers for a coating line. |
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PCT/US2019/015959 WO2020159505A1 (en) | 2019-01-31 | 2019-01-31 | Method and apparatus for extending the campaign life of stabilizers for a coating line |
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WO2020159505A1 true WO2020159505A1 (en) | 2020-08-06 |
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PCT/US2019/015959 WO2020159505A1 (en) | 2019-01-31 | 2019-01-31 | Method and apparatus for extending the campaign life of stabilizers for a coating line |
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EP (1) | EP3918103A1 (en) |
JP (1) | JP7450628B2 (en) |
KR (1) | KR20210120077A (en) |
CN (1) | CN113383104A (en) |
CA (1) | CA3126387A1 (en) |
MX (1) | MX2021009282A (en) |
WO (1) | WO2020159505A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5072689A (en) * | 1988-06-15 | 1991-12-17 | Hitachi, Ltd. | Continuous hot-dip plating apparatus |
WO2016103044A1 (en) * | 2014-12-23 | 2016-06-30 | Arcelormittal S.A. | Thrust bearing and clamp in roll journal assembly |
US20180002796A1 (en) * | 2016-04-29 | 2018-01-04 | Ak Steel Properties, Inc. | Method for extending the campaign life of stabilizers for a coating line |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US6719945B2 (en) | 2001-12-14 | 2004-04-13 | Jorge A. Morando | Galvanizing roll assembly with self-aligning hydrodynamic film lubricated roller-bearings |
CN101988512A (en) * | 2009-07-30 | 2011-03-23 | 上海新沪电机厂有限公司 | Novel chemical electric pump |
FR2975106B1 (en) * | 2011-05-13 | 2013-06-14 | Snecma Propulsion Solide | TREATMENT PLANT WITH MOLTEN METAL BATH AND ROLLERS |
KR101587068B1 (en) | 2014-10-10 | 2016-02-02 | 주식회사 부강특수산업 | Continuous melting device also supports the rotating shaft of the roll deposition |
JP6579066B2 (en) | 2016-09-05 | 2019-09-25 | 日立金属株式会社 | Bearing device |
-
2019
- 2019-01-31 EP EP19708909.7A patent/EP3918103A1/en active Pending
- 2019-01-31 CA CA3126387A patent/CA3126387A1/en active Pending
- 2019-01-31 WO PCT/US2019/015959 patent/WO2020159505A1/en unknown
- 2019-01-31 JP JP2021544283A patent/JP7450628B2/en active Active
- 2019-01-31 CN CN201980090919.5A patent/CN113383104A/en active Pending
- 2019-01-31 KR KR1020217027523A patent/KR20210120077A/en not_active IP Right Cessation
- 2019-01-31 MX MX2021009282A patent/MX2021009282A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5072689A (en) * | 1988-06-15 | 1991-12-17 | Hitachi, Ltd. | Continuous hot-dip plating apparatus |
WO2016103044A1 (en) * | 2014-12-23 | 2016-06-30 | Arcelormittal S.A. | Thrust bearing and clamp in roll journal assembly |
US20180002796A1 (en) * | 2016-04-29 | 2018-01-04 | Ak Steel Properties, Inc. | Method for extending the campaign life of stabilizers for a coating line |
Also Published As
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KR20210120077A (en) | 2021-10-06 |
MX2021009282A (en) | 2021-09-08 |
EP3918103A1 (en) | 2021-12-08 |
CA3126387A1 (en) | 2020-08-06 |
JP2022523500A (en) | 2022-04-25 |
CN113383104A (en) | 2021-09-10 |
JP7450628B2 (en) | 2024-03-15 |
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