CN110747426A - Method for preventing surface of ultrathin hot-dip galvanized sheet from being scratched - Google Patents
Method for preventing surface of ultrathin hot-dip galvanized sheet from being scratched Download PDFInfo
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- CN110747426A CN110747426A CN201911030742.8A CN201911030742A CN110747426A CN 110747426 A CN110747426 A CN 110747426A CN 201911030742 A CN201911030742 A CN 201911030742A CN 110747426 A CN110747426 A CN 110747426A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 238000005516 engineering process Methods 0.000 claims abstract description 10
- 238000010285 flame spraying Methods 0.000 claims abstract description 9
- 230000009467 reduction Effects 0.000 claims description 16
- 238000012935 Averaging Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 22
- 239000010959 steel Substances 0.000 abstract description 22
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000011701 zinc Substances 0.000 abstract description 10
- 229910052725 zinc Inorganic materials 0.000 abstract description 10
- 238000007747 plating Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- 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
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/18—After-treatment
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/30—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring roughness or irregularity of surfaces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
- G01B5/12—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a method for preventing the surface of an ultrathin hot-dip galvanized sheet from being scratched. Firstly, spraying the roller surface of the sink roller by adopting a supersonic flame spraying technology; measuring the roughness of the roller surface of the sprayed sinking roller; then comparing the measured actual roughness with the target roughness; if the actual roughness is less than the target roughness, the rough treatment is continuously carried out on the roll surface of the sink roll, the roughness of the roll surface of the sink roll after spraying is ensured to be maintained at a required higher level, so that the friction torque between the strip steel and the roll surface is increased, the driving force of the sink roll is further increased, namely, the circumferential force of the sink roll is increased, after the circumferential force is increased, the roll can more easily rotate for the sink roll with the same quality, the rotating speed difference between the sink roll and the strip steel is reduced, the scratch caused by the speed difference is reduced, the surface quality of the strip steel in the zinc plating process section area is effectively ensured, and the through plate stability of the zinc pot area is effectively improved.
Description
Technical Field
The invention relates to the technical field of hot galvanizing, in particular to a method for preventing the surface of an ultrathin hot galvanizing plate from being scratched.
Background
With the market depression of the domestic steel industry, the adjustment of product structure, the development and expansion of specification and the upgrading of quality become the main research direction of steel enterprises. The first Steel Jing Tang company cold rolling department, as a trampler of the first steel cold rolling fine plate product, vigorously develops high-grade, high-demand and high-income high-end leading strategic products, and strives to realize a differentiated development road of capacity optimization, cost reduction and quality improvement and market expansion. The ultrathin products with the thickness of less than 0.35mm of the hot galvanizing unit are mainly applied to back plates, side plates and panels of white household appliances such as washing machines, refrigerators, air conditioners and the like, and the surface quality requirement of the products is higher. With the low processing cost and high surface quality requirement of household appliance manufacturers, the market demand of the household appliance plate for the specification is gradually increased, and if the surface quality of the ultrathin household appliance plate produced by the 1700 galvanizing unit can meet the requirement of a user, the product competitiveness and the unit profitability can be improved. The surface of the ultrathin hot-dip galvanized product produced at present can be scratched by a sink roll, so that the surface quality of the ultrathin hot-dip galvanized product is reduced.
Therefore, in order to enable the surface quality of ultrathin hot-dip galvanized products with the specification of less than 0.35mm to meet the requirements of customers and have stable mass production capacity, the rules need to be summarized from production practice and the production process control technology needs to be optimized.
Disclosure of Invention
The invention provides a method for preventing the surface of an ultrathin hot-dip galvanized sheet from being scratched, solves the technical problem that the surface of an ultrathin hot-dip galvanized product is scratched by a sink roll in the prior art, and realizes the technical effect of improving the surface quality of the ultrathin hot-dip galvanized product.
The invention provides a method for preventing the surface of an ultrathin hot-galvanized plate from being scratched, which comprises the following steps:
spraying the roller surface of the sink roller by adopting a supersonic flame spraying technology;
measuring the roughness of the roller surface of the sprayed sinking roller;
comparing the measured actual roughness with a target roughness;
and if the actual roughness is less than the target roughness, performing rough treatment on the roller surface of the sink roller.
Further, still include:
and if the actual roughness is equal to or larger than the target roughness, performing peak clipping treatment on the roll surface of the sink roll.
Further, after the roller surface of the sink roller is sprayed by the supersonic flame spraying technology, the method further comprises the following steps:
and coating an anti-zinc-sticking hole sealing agent on the roller surface of the sprayed sinking roller, and baking in a heating furnace until the hole sealing agent is attached to the roller surface of the sprayed sinking roller.
Further, the measuring the roughness of the roller surface of the sprayed sink roller includes:
measuring the roughness of at least three points on a driving side, a middle part and an operating side of three uniform bus bars of the roller surface of the sprayed sinking roller;
averaging the roughness of the driving side to obtain the average roughness of the driving side of the roll surface of the sink roll;
averaging the roughness of the middle part to obtain the average roughness of the middle part of the roll surface of the sink roll;
averaging the roughness of the operation side to obtain the average roughness of the roll surface operation side of the sink roll;
the comparing the measured actual roughness with the target roughness comprises:
respectively comparing the average roughness of the driving side of the roll surface of the sink roll with the target roughness, comparing the average roughness of the middle part of the roll surface of the sink roll with the target roughness, and comparing the average roughness of the operating side of the roll surface of the sink roll with the target roughness;
if the average roughness of the roller surface driving side of the sink roller is smaller than the target roughness, performing rough treatment on the roller surface driving side of the sink roller; if the average roughness of the middle part of the roller surface of the sink roller is smaller than the target roughness, performing rough treatment on the middle part of the roller surface of the sink roller; and if the average roughness of the roller surface operation side of the sink roller is less than the target roughness, performing rough treatment on the roller surface operation side of the sink roller.
Further, still include:
measuring the inner diameter reduction of a shaft sleeve of the sink roll bearing;
comparing the measured inner diameter reduction with a reduction threshold;
and if the inner diameter thinning amount is larger than the thinning amount threshold value, rotating the shaft sleeve along the circumferential direction, and changing the contact surface of the shaft sleeve and the sink roll bearing.
Further, the measuring of the reduction amount of the inner diameter of the shaft sleeve of the sink roll bearing comprises:
and measuring the inner diameter reduction amount of the shaft sleeve of the sink roll bearing through an inner diameter micrometer.
Further, still include:
marking the end face of the shaft sleeve;
the rotating the sleeve in the circumferential direction includes:
rotating the sleeve by 90 ° in the circumferential direction, with the mark as a reference.
Furthermore, the material of the shaft sleeve is ceramic with the hardness of more than 45 HRC.
One or more technical schemes provided by the invention at least have the following technical effects or advantages:
firstly, spraying the roller surface of the sink roller by adopting a supersonic flame spraying technology; measuring the roughness of the roller surface of the sprayed sinking roller; then comparing the measured actual roughness with the target roughness; if the actual roughness is less than the target roughness, the rough treatment is continuously carried out on the roll surface of the sink roll, the roughness of the roll surface of the sink roll after spraying is ensured to be maintained at a required higher level, so that the friction torque between the strip steel and the roll surface is increased, the driving force of the sink roll is further increased, namely, the circumferential force of the sink roll is increased, after the circumferential force is increased, the roll can more easily rotate for the sink roll with the same quality, the rotating speed difference between the sink roll and the strip steel is reduced, the scratch caused by the speed difference is reduced, the surface quality of the strip steel in the zinc plating process section area is effectively ensured, and the through plate stability of the zinc pot area is effectively improved.
Drawings
Fig. 1 is a flowchart of a method for preventing a surface of an ultra-thin hot-dip galvanized sheet from being scratched according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method for preventing the surface of an ultrathin hot-dip galvanized sheet from being scratched, so that the technical problem that the surface of the ultrathin hot-dip galvanized product is scratched by a sink roll in the prior art is solved, and the technical effect of improving the surface quality of the ultrathin hot-dip galvanized product is realized.
In order to solve the above problems, the technical solution in the embodiments of the present invention has the following general idea:
firstly, spraying the roller surface of the sink roller by adopting a supersonic flame spraying technology; measuring the roughness of the roller surface of the sprayed sinking roller; then comparing the measured actual roughness with the target roughness; if the actual roughness is less than the target roughness, the rough treatment is continuously carried out on the roll surface of the sink roll, the roughness of the roll surface of the sink roll after spraying is ensured to be maintained at a required higher level, so that the friction torque between the strip steel and the roll surface is increased, the driving force of the sink roll is further increased, namely, the circumferential force of the sink roll is increased, after the circumferential force is increased, the roll can more easily rotate for the sink roll with the same quality, the rotating speed difference between the sink roll and the strip steel is reduced, the scratch caused by the speed difference is reduced, the surface quality of the strip steel in the zinc plating process section area is effectively ensured, and the through plate stability of the zinc pot area is effectively improved.
For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the embodiments.
Referring to fig. 1, the method for preventing a surface of an ultra-thin hot-dip galvanized sheet from being scratched according to an embodiment of the present invention includes:
step S110: spraying the roller surface of the sink roller by adopting a supersonic flame spraying technology;
in order to reduce the height difference of wave crests and wave troughs on the surface of the roller after spraying, namely filling miniature pits on the surface of the roller, improving the slag adhesion condition on the surface of the roller and avoiding scratching, the method also comprises the following steps after the roller surface of the sink roller is sprayed by adopting a supersonic flame spraying technology:
and coating the sprayed roll surface of the sink roll with a zinc-adhesion-resistant hole sealing agent, and baking in a heating furnace until the hole sealing agent is attached to the sprayed roll surface of the sink roll.
In the invention, the spraying roller is required to have no surface defects, the recycling roller is required to have no roller surface protrusion defects, the defects of a single pit are less than or equal to 1 multiplied by 1mm, the number of the defects of the pit is less than 10, and the defects in 120mm at the edge part of the roller are ignored.
The roll system parameter standards are shown in Table 1:
TABLE 1 roller series parameter Standard
In addition, the dynamic balance standard of the sink roll is increased to 500g, and the dynamic balance standard of the stabilizing roll is increased to 200g, as shown in table 2:
TABLE 2 dynamic balance criteria
Step S120: measuring the roughness of the roller surface of the sprayed sinking roller;
specifically, the roughness of the roll surface of the sink roll after spraying was measured by a roughness meter. When the roughness value Ra is more than or equal to 2 mu m, selecting a sampling length of 2.5 mm; a sampling length of 0.8mm was chosen when the roughness values were Ra < 2 μm.
In the invention, the roughness meter is of an epoch T-200 type.
Step S130: comparing the measured actual roughness with a target roughness;
and if the actual roughness is less than the target roughness, performing rough treatment on the roller surface of the sink roller.
And if the actual roughness is equal to or greater than the target roughness, performing peak clipping treatment on the roll surface of the sink roll, and further reducing the speed difference scratch.
In order to ensure that the measured roughness is representative, thereby ensuring that the roll surface of the sink roll has larger roughness, further increasing the friction torque between the strip steel and the roll surface, increasing the driving force of the sink roll, and measuring the roughness of the roll surface of the sink roll after spraying, the method comprises the following steps:
measuring the roughness of at least three points on a driving side, a middle part and an operating side of three uniform bus bars on the roller surface of the sprayed sinking roller;
averaging the roughness of the driving side to obtain the average roughness of the driving side of the roll surface of the sink roll;
averaging the roughness of the middle part to obtain the average roughness of the middle part of the roll surface of the sink roll;
averaging the roughness of the operation side to obtain the average roughness of the operation side of the roll surface of the sink roll;
in this case, comparing the measured actual roughness with the target roughness includes:
the average roughness of the driving side of the roll surface of the sink roll is compared with a target roughness, the average roughness of the middle part of the roll surface of the sink roll is compared with a target roughness, and the average roughness of the operating side of the roll surface of the sink roll is compared with a target roughness.
If the average roughness of the roller surface driving side of the sink roller is smaller than the target roughness, performing rough treatment on the roller surface driving side of the sink roller; if the average roughness of the middle part of the roll surface of the sink roll is smaller than the target roughness, performing rough treatment on the middle part of the roll surface of the sink roll; and if the average roughness of the roll surface operation side of the sink roll is smaller than the target roughness, performing rough treatment on the roll surface operation side of the sink roll, so as to ensure that the roughness of each part of the roll surface of the sink roll meets the requirement, and further ensure that the surface of the strip steel is not scratched.
In order to reduce the frictional resistance of sink roll bearing and axle sleeve to further avoid the surface of belted steel by the fish tail, still include:
measuring the inner diameter reduction of a shaft sleeve of the sink roll bearing; specifically, the inside diameter reduction amount of the sleeve of the sink roll bearing is measured by an inside micrometer.
Comparing the measured inner diameter reduction with a reduction threshold;
and if the inner diameter thinning amount is larger than the thinning amount threshold value, rotating the shaft sleeve along the circumferential direction, and changing the contact surface of the shaft sleeve and the sink roll bearing.
Further explaining the step, the method further comprises the following steps:
marking the end face of the shaft sleeve;
rotating the sleeve in a circumferential direction, comprising:
the shaft sleeve is rotated by 90 degrees along the circumferential direction by using the mark as a reference, so that the contact surface of the shaft sleeve and the bearing is a new surface, the aim of reducing the friction force in use is fulfilled, and the rotating speed difference between the sink roll and the strip steel is further reduced.
In order to prevent the zinc solution from penetrating into the bushing and further reduce the friction force, in this embodiment, the material of the bushing is ceramic with hardness greater than 45 HRC.
Here, in order to improve the assembly accuracy of the sink roll and further avoid the sink roll from being scratched, the sink roll is assembled according to the assembly standard shown in table 3.
TABLE 3 Assembly Standard
Through the measures, the sink roll scratch is basically eliminated, and the sink roll scratch does not occur during high-speed (135m/min) production.
[ technical effects ] of
1. Firstly, spraying the roller surface of the sink roller by adopting a supersonic flame spraying technology; measuring the roughness of the roller surface of the sprayed sinking roller; then comparing the measured actual roughness with the target roughness; if the actual roughness is less than the target roughness, the rough treatment is continuously carried out on the roll surface of the sink roll, the roughness of the roll surface of the sink roll after spraying is ensured to be maintained at a required higher level, so that the friction torque between the strip steel and the roll surface is increased, the driving force of the sink roll is further increased, namely, the circumferential force of the sink roll is increased, after the circumferential force is increased, the roll can more easily rotate for the sink roll with the same quality, the rotating speed difference between the sink roll and the strip steel is reduced, the scratch caused by the speed difference is reduced, the surface quality of the strip steel in the zinc plating process section area is effectively ensured, and the through plate stability of the zinc pot area is effectively improved.
2. And coating the anti-zinc-sticking hole sealing agent on the roller surface of the sprayed sinking roller, and baking in a heating furnace until the hole sealing agent is attached to the roller surface of the sprayed sinking roller, so that the height difference of wave crests and wave troughs on the surface of the roller after spraying is reduced, namely, micro pits on the surface of the roller are filled, the slag sticking condition on the surface of the roller is improved, and the roller is prevented from being scratched.
3. The friction resistance between the sink roll bearing and the shaft sleeve is reduced, so that the sink roll rotates more smoothly, the rotating speed difference between the sink roll and the strip steel is further reduced, and the surface of the strip steel is further prevented from being scratched.
The embodiment of the invention starts with two aspects of increasing the friction torque between the strip steel and the roller surface, further increasing the driving force of the sink roller and reducing the friction resistance between the sink roller bearing and the shaft sleeve by analyzing the scratch stress of the sink roller, forms a set of supporting technical system related to ultrathin specification galvanized products by adjusting measures in various aspects such as the tension optimization of a cooling tower after plating, the assembly improvement of the sink roller and the like, effectively solves the scratch problem of the sink roller of a zinc pot, and plays a positive promoting role in further promoting the capacity optimization, the structure adjustment, the cost reduction and the quality improvement, the market expansion and the like.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A method for preventing the surface of an ultrathin hot-galvanized plate from being scratched is characterized by comprising the following steps:
spraying the roller surface of the sink roller by adopting a supersonic flame spraying technology;
measuring the roughness of the roller surface of the sprayed sinking roller;
comparing the measured actual roughness with a target roughness;
and if the actual roughness is less than the target roughness, performing rough treatment on the roller surface of the sink roller.
2. The method of claim 1, further comprising:
and if the actual roughness is equal to or larger than the target roughness, performing peak clipping treatment on the roll surface of the sink roll.
3. The method of claim 1, wherein after said applying a supersonic flame spray technique to the roll surface of the sink roll, further comprising:
and coating an anti-zinc-sticking hole sealing agent on the roller surface of the sprayed sinking roller, and baking in a heating furnace until the hole sealing agent is attached to the roller surface of the sprayed sinking roller.
4. The method of claim 1, wherein measuring the roughness of the roll surface of the sprayed sink roll comprises:
measuring the roughness of at least three points on a driving side, a middle part and an operating side of three uniform bus bars of the roller surface of the sprayed sinking roller;
averaging the roughness of the driving side to obtain the average roughness of the driving side of the roll surface of the sink roll;
averaging the roughness of the middle part to obtain the average roughness of the middle part of the roll surface of the sink roll;
averaging the roughness of the operation side to obtain the average roughness of the roll surface operation side of the sink roll;
the comparing the measured actual roughness with the target roughness comprises:
respectively comparing the average roughness of the driving side of the roll surface of the sink roll with the target roughness, comparing the average roughness of the middle part of the roll surface of the sink roll with the target roughness, and comparing the average roughness of the operating side of the roll surface of the sink roll with the target roughness;
if the average roughness of the roller surface driving side of the sink roller is smaller than the target roughness, performing rough treatment on the roller surface driving side of the sink roller; if the average roughness of the middle part of the roller surface of the sink roller is smaller than the target roughness, performing rough treatment on the middle part of the roller surface of the sink roller; and if the average roughness of the roller surface operation side of the sink roller is less than the target roughness, performing rough treatment on the roller surface operation side of the sink roller.
5. The method of claim 1, further comprising:
measuring the inner diameter reduction of a shaft sleeve of the sink roll bearing;
comparing the measured inner diameter reduction with a reduction threshold;
and if the inner diameter thinning amount is larger than the thinning amount threshold value, rotating the shaft sleeve along the circumferential direction, and changing the contact surface of the shaft sleeve and the sink roll bearing.
6. The method of claim 5, wherein measuring the amount of inner diameter reduction of the sleeve of the sink roll bearing comprises:
and measuring the inner diameter reduction amount of the shaft sleeve of the sink roll bearing through an inner diameter micrometer.
7. The method of claim 6, further comprising:
marking the end face of the shaft sleeve;
the rotating the sleeve in the circumferential direction includes:
rotating the sleeve by 90 ° in the circumferential direction, with the mark as a reference.
8. The method of claim 5, wherein the sleeve is made of a ceramic having a hardness greater than 45 HRC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911030742.8A CN110747426A (en) | 2019-10-28 | 2019-10-28 | Method for preventing surface of ultrathin hot-dip galvanized sheet from being scratched |
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| CN201911030742.8A CN110747426A (en) | 2019-10-28 | 2019-10-28 | Method for preventing surface of ultrathin hot-dip galvanized sheet from being scratched |
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| CN111426295A (en) * | 2020-04-17 | 2020-07-17 | 西安奕斯伟硅片技术有限公司 | Crystal bar diameter measuring device and method |
| CN115369344A (en) * | 2022-07-17 | 2022-11-22 | 新疆八一钢铁股份有限公司 | Operation method for controlling production of ultra-thin ultra-wideband steel sink roll |
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| CN111426295B (en) * | 2020-04-17 | 2021-11-23 | 西安奕斯伟材料科技有限公司 | Crystal bar diameter measuring device and method |
| CN115369344A (en) * | 2022-07-17 | 2022-11-22 | 新疆八一钢铁股份有限公司 | Operation method for controlling production of ultra-thin ultra-wideband steel sink roll |
| CN115369344B (en) * | 2022-07-17 | 2023-09-01 | 新疆八一钢铁股份有限公司 | Operation method for controlling sinking roller for producing ultra-thin ultra-wide band steel |
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