CN117288758A - Method for checking surface quality of rolled hard coil - Google Patents
Method for checking surface quality of rolled hard coil Download PDFInfo
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- CN117288758A CN117288758A CN202311258214.4A CN202311258214A CN117288758A CN 117288758 A CN117288758 A CN 117288758A CN 202311258214 A CN202311258214 A CN 202311258214A CN 117288758 A CN117288758 A CN 117288758A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 112
- 239000010959 steel Substances 0.000 claims abstract description 112
- 238000005498 polishing Methods 0.000 claims abstract description 76
- 230000007547 defect Effects 0.000 claims abstract description 43
- 239000004576 sand Substances 0.000 claims abstract description 29
- 230000003068 static effect Effects 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 230000004075 alteration Effects 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000007689 inspection Methods 0.000 claims description 70
- 238000005096 rolling process Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8803—Visual inspection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/06—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving conveyor belts, a sequence of travelling work-tables or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/10—Single-purpose machines or devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/8921—Streaks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
- G01N2021/8918—Metal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Textile Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a method for checking the surface quality of a rolled hard coil, which relates to the technical field of metallurgical plate production management and comprises the following steps: s1, reversely unwinding and checking; s2, checking the positive unreeling; s3, sampling, off-line checking and polishing; s4, polishing the automobile panel. Aiming at the situation that the surface quality of a rolled hard coil is difficult to check and is easy to miss-check, the invention realizes the full-coverage check on the upper surface and the lower surface of the rolled hard coil by adopting two uncoiling modes of forward uncoiling and reverse uncoiling, can effectively check all roll marks, chromatic aberration, speckles and scratches of the rolled hard coil by adopting the checking modes of different angles and different positions in a dynamic checking process and a static checking process, and simultaneously combines a 3M sand disc and an oilstone to polish and check the surface of strip steel, thereby realizing the checking and blocking of the defects such as vibration lines, polishing roll marks and the like of the rolled hard coil and effectively avoiding the miss-check of the quality defects of the rolled hard coil.
Description
Technical Field
The invention relates to the technical field of metallurgical plate production management, in particular to a method for checking the surface quality of a rolled hard coil.
Background
The pickling continuous rolling unit is used as an important process for plate production management, and mainly provides a rolling hard coil cold rolling base material for a continuous galvanization finished product unit, and meanwhile, a part of rolling hard coils are wrapped for customers to be directly used, so that the production and quality of the finished product unit are greatly affected, and the surface quality inspection work of the rolling hard coils is particularly important. The rolling speed of the hard coil is high and reaches 1500mpm at most, no online surface quality inspection tool exists after rolling in the industry at present, the surface quality inspection of the hard coil can be carried out only through off-line uncoiling manually, the manual inspection mode and method are unreasonable, quality defect omission is easy to cause, and therefore, the acid rolling mill group needs to have a comprehensive and efficient quality inspection method.
Disclosure of Invention
The invention aims to provide a method for checking the surface quality of a hard rolled coil, which adopts two uncoiling modes of forward uncoiling and reverse uncoiling, adopts different angles and different positions of a dynamic checking process and a static checking process, combines a 3M sand disc and an oilstone to polish and check the surface of strip steel, realizes checking and blocking all defects of roll marks, chromatic aberration, vibration lines, specks, scratches and the like of the hard rolled coil, and can effectively avoid the missing detection of the quality defects of the hard rolled coil so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method of inspecting the surface quality of a rolled hard coil comprising the steps of:
s1: and (3) reverse uncoiling inspection: after A, B inspectors reach 'position 1' and 'position 2', C inspectors perform reverse uncoiling operation, A, B inspectors perform dynamic and static quality inspection, wherein the position 1 is positioned on the operation side of the steel coil tape head, and the position 2 is positioned on the transmission side of the steel coil;
s2: forward unwind inspection: after A, B inspectors reach 'position 3' and 'position 4', C inspectors perform forward unreeling operation, A, B inspectors perform dynamic and static quality inspection, wherein the position 3 is positioned at the steel coil transmission side and beside the mandrel, and the position 4 is positioned right in front of the steel coil operation;
s3: sampling off-line checking and polishing: a new 3M sand disc is used for inspecting the surface quality of the steel coil for inspecting the outer plate and the head part of the automobile, sampling is carried out on an off-line polishing table for polishing, the length of a sample plate is not less than 600mm, the surface defect of the strip steel is inspected, and the vibration pattern inspection is horizontally polished along the rolling direction of the strip steel;
s4: polishing a production automobile panel: and (3) polishing the whole board surface by adopting the oilstone on line, wherein the polishing area covers the whole board surface.
Further, the dynamic quality check content in S1 includes:
a: checking personnel A performs far-view and side-view checking on the surface of the strip steel under the dynamic state of the position 1, including checking the appearance of chromatic aberration, transverse lines and vibration lines and dynamic visual defects until uncoiling is finished;
b: and (3) checking the front view and the side view of the surface of the strip steel by the checking staff B in the dynamic state of the position 2, wherein the checking staff B comprises local defects of roll marks and scratches until the uncoiling is finished.
Further, the static quality inspection content in S1 includes:
a: the inspector A, B wipes the cotton cloth or industrial paper at the position 2 to clean the greasy dirt on the surface of the strip steel, polishes the strip steel by using a 3M sand disc, and observes whether the polished plate surface has defects or not by using different viewing distances and angles;
b: wiping the strip steel with special paper until the surface of the strip steel is clean, wherein the cleaning length is not less than 2 meters; polishing the cleaned strip steel with a 3M sand disc after quality inspection, wherein the polishing length is not less than 2 meters;
c: the surface of the strip steel cannot be polluted in the inspection process, namely, the strip steel is wiped, polished and inspected, and the strip steel is strictly forbidden to be stepped on by feet.
Further, the dynamic quality check content in S2 includes:
a: the inspector A performs far-view and side-view inspection on the surface of the strip steel under the dynamic condition of the position 3, including inspection on the appearance of chromatic aberration, transverse lines and vibration lines and dynamic visual defects; after the strip head enters the pinch roll, an inspector A inspects the surface of the strip steel in a front view and a side view under the dynamic state of the position 5, wherein the inspection comprises partial defects of roll marks and scratches until the uncoiling is finished; wherein the position 5 is positioned on the transmission side of the steel coil;
b: and (3) checking the long-sight and side-view of the surface of the strip steel by a checking staff B under the dynamic state of the position 4, wherein the checking staff B checks the large appearance and dynamic visual defects of mountain-like roll marks, chromatic aberration, transverse lines and vibration lines until the uncoiling is finished.
Further, the static quality inspection content in S2 includes:
a: the inspector A, B wipes and cleans greasy dirt on the surface of the strip steel by special paper at the position 6, polishes by using a 3M sand disc, and observes whether the polished plate surface has defects or not by using different viewing distances and angles; wherein the position 6 is positioned at the steel coil operation side;
b: polishing requirements are as follows: the polishing length of the 3M sand disc is not less than 2 meters, and the surface of the strip steel is ensured to be clean before polishing;
c: the surface of the strip steel cannot be polluted in the inspection process, namely, the strip steel is wiped, polished and inspected, and the strip steel is strictly forbidden to be stepped on by feet.
Further, the normal board inspection method for sampling off-line in S3 is as follows: after the roll is changed, polishing the first roll before the first roll is subjected to shift connection; and (3) checking an outer plate: the outer plate is provided with an inspection table roll which is polished on line by an oilstone and a 3M sand disc by more than two meters.
Further, the polishing content of the automobile panel in S4 includes:
a: adopting a 3M sand disc to polish the non-directional requirements;
b: the oilstone is adopted to polish in the parallel rolling direction, the working surface of the oilstone is kept in good contact with the surface of the strip steel, and the polishing is uniformly applied with force, so that continuous, dense and uniform sliding marks are generated on the surface of the strip steel by the oilstone, and the strip steel and the oilstone are kept clean;
c: the checking method comprises the following steps: observing whether defects exist on the polished surface of the strip steel at least in two directions of 45 degrees and 90 degrees with the surface of the strip steel and different viewing distances after polishing is finished;
d: using a 3M sand table to check common defects of strip steel, and polishing by using oilstones to check the defects of vibration lines, transverse stripes, knife marks and longitudinal stripes, wherein the upper and lower surfaces of the strip steel are polished off-line by adopting a horizontal polishing mode;
e: polishing the lower surface by not less than 2 meters;
f: and the upper surface and the lower surface are all polished during sampling and polishing, each time the inspection bench on the panel rolls one sample, the sample is left after polishing, and the sampling length is not less than 600mm multiplied by the plate width.
Compared with the prior art, the invention has the beneficial effects that:
the method for checking the surface quality of the hard rolling coil provided by the invention realizes the full coverage checking of the upper surface and the lower surface of the hard rolling coil by adopting two uncoiling modes of forward uncoiling and reverse uncoiling, can effectively check all the roll marks, color differences, marks and scratches of the hard rolling coil by adopting the checking modes of different angles and different positions in a dynamic checking process and a static checking process, and simultaneously combines a 3M sand disc and an oilstone to polish and check the surface of strip steel, thereby realizing checking and blocking defects such as vibration lines, polishing roll marks and the like of the hard rolling coil and effectively avoiding the omission of checking of the quality defects of the hard rolling coil.
Drawings
FIG. 1 is a reverse unwind schematic of the present invention;
FIG. 2 is a schematic drawing of a forward unwind of the present invention;
FIG. 3 is a schematic illustration of an on-line sanding of the present invention;
fig. 4 is a view of the present invention from different viewing angles after sanding.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, a method for inspecting surface quality of a rolled hard coil is provided in an embodiment of the present invention, which includes the following steps:
step one: and (3) reverse uncoiling inspection: after A, B inspectors reach 'position 1' and 'position 2', C inspectors perform reverse uncoiling operation, A, B inspectors perform dynamic and static quality inspection, wherein the position 1 is positioned on the operation side of the steel coil tape head, and the position 2 is positioned on the transmission side of the steel coil;
specifically, dynamic quality inspection: after the steel coil is uncoiled, A, B inspectors perform dynamic quality inspection at the positions 1 and 2, wherein the inspection content comprises:
a: checking personnel A performs far-view and side-view checking on the surface of the strip steel under the dynamic state of the position 1, including checking the appearance of chromatic aberration, transverse lines and vibration lines and dynamic visual defects until uncoiling is finished;
b: and (3) checking the front view and the side view of the surface of the strip steel by the checking staff B in the dynamic state of the position 2, wherein the checking staff B comprises local defects of roll marks and scratches until the uncoiling is finished.
Specifically, static quality inspection: after the reverse uncoiling is in place, A, B inspectors inspect the lower surfaces of the static strip steel on two sides of the strip steel, wherein the inspection contents comprise:
a: the inspector A, B wipes and cleans greasy dirt on the surface of the strip steel with cotton cloth or industrial paper at the position 2, polishes with a 3M sand disc, uses different viewing distances and angles to observe whether defects exist on the polished plate surface (namely, the strip steel is inspected firstly after being cleaned and then polished, and then inspected after polishing is finished, namely, the inspection of first cleaning, second polishing and third polishing is the same as the inspection);
b: the special paper is ensured to wipe the strip steel, the surface of the strip steel is ensured to be clean, and the cleaning length is not less than 2 meters; polishing the cleaned strip steel with a 3M sand disc after quality inspection, wherein the polishing length is not less than 2 meters;
c: the surface of the strip steel cannot be polluted in the inspection process, namely, the strip steel is wiped, polished and inspected, and the strip steel is strictly forbidden to be stepped on by feet.
Step two: forward unwind inspection: after A, B inspectors reach 'position 3' and 'position 4', C inspectors perform forward unreeling operation, A, B inspectors perform dynamic and static quality inspection, wherein the position 3 is positioned at the steel coil transmission side and beside the mandrel, and the position 4 is positioned right in front of the steel coil operation;
specifically, dynamic quality inspection: after the steel coil is uncoiled in the forward direction, A, B inspectors perform dynamic quality inspection at positions 3, 5 and 4, and the contents comprise:
a: the inspector A performs far-view and side-view inspection on the surface of the strip steel under the dynamic condition of the position 3, including inspection on the appearance of chromatic aberration, transverse lines and vibration lines and dynamic visual defects; after the strip head enters the pinch roll, an inspector A inspects the surface of the strip steel in a front view and a side view under the dynamic state of the position 5, wherein the inspection comprises partial defects of roll marks and scratches until the uncoiling is finished; wherein the position 5 is positioned on the transmission side of the steel coil;
b: and (3) checking the long-sight and side-view of the surface of the strip steel by a checking staff B under the dynamic state of the position 4, wherein the checking staff B checks the large appearance and dynamic visual defects of mountain-like roll marks, chromatic aberration, transverse lines and vibration lines until the uncoiling is finished.
Specifically, static quality inspection: after forward uncoiling, A, B inspectors perform surface inspection under static strip steel on two sides of the strip steel, and C inspectors go off-line sampling, polishing and inspection. Checking content:
a: the inspector A, B wipes and cleans greasy dirt on the surface of the strip steel at the positions 5 and 6 by special paper, polishes by using a 3M sand disc, and observes whether the polished plate surface has defects or not by using different viewing distances and angles; wherein the position 6 is positioned at the steel coil operation side;
b: polishing requirements are as follows: the polishing length of the 3M sand disc is not less than 2 meters, and the surface of the strip steel is ensured to be clean before polishing;
c: the surface of the strip steel cannot be polluted in the inspection process, namely, the strip steel is wiped, polished and inspected, and the strip steel is strictly forbidden to be stepped on by feet.
Step three: sampling off-line checking and polishing: a new 3M sand disc is used for inspecting the surface quality of the steel coil for inspecting the outer plate and the head part of the automobile, sampling is carried out on an off-line polishing table for polishing, the length of a sample plate is not less than 600mm, the surface defect of the strip steel is inspected, and the vibration pattern inspection is horizontally polished along the rolling direction of the strip steel;
the method also comprises the following steps of: after the roll is changed, polishing the first roll before the first roll is subjected to shift connection;
and (3) checking an outer plate: the outer plate upper inspection bench roll is subjected to online polishing through an oilstone and a 3M sand disc at the inspection bench, and each upper inspection bench roll is subjected to online polishing through a polishing bench, and each upper inspection bench roll is required to be subjected to polishing through a polishing bench.
Step four: polishing a production automobile panel: the oil stone is adopted for online polishing, the polishing area covers the whole board surface, as shown in fig. 3, and the specific polishing requirements are as follows:
a: adopting a 3M sand disc to polish the non-directional requirements;
b: the method comprises the steps of adopting the oilstones to polish in parallel rolling directions, wherein the polishing ensures that the working surface of the oilstones is in good contact with the surface of the strip steel, uniform force is required during polishing, and the polishing is optimal when the oilstones generate continuous, dense and uniform sliding marks on the surface of the strip steel, so that the strip steel and the oilstones are ensured to be clean;
c: the checking method comprises the following steps: observing whether defects exist on the polished surface of the strip steel at least in two directions of 45 degrees and 90 degrees with the surface of the strip steel and different viewing distances after polishing is finished, as shown in fig. 4;
d: using a 3M sand table to check common defects of strip steel, and polishing by using oilstones to check the defects of vibration lines, transverse stripes, knife marks and longitudinal stripes, wherein the upper and lower surfaces of the strip steel are polished off-line by adopting a horizontal polishing mode;
e: polishing the lower surface by not less than 2 meters;
f: and the upper surface and the lower surface are all polished during sampling and polishing, each time the inspection bench on the panel rolls one sample, the sample is left after polishing, and the sampling length is not less than 600mm multiplied by the plate width.
To sum up: according to the method for checking the surface quality of the hard rolled coil, provided by the invention, by adopting two uncoiling modes of forward uncoiling and reverse uncoiling, and the checking modes of different angles and different positions in a dynamic checking process and a static checking process, and simultaneously combining a 3M sand disc and an oilstone to polish and check the surface of strip steel, all defects such as roll marks, chromatic aberration, vibration lines, specks and scratches of the hard rolled coil are checked and blocked, and the defect omission of the quality of the hard rolled coil can be effectively avoided. Secondly, the invention uses the 3M sand table aiming at the roller mark defect inspection polishing mode, and confirms the inspection position and angle, adopts different forward and reverse uncoiling modes, and adopts a dynamic and static combined inspection mode.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (7)
1. A method for inspecting the surface quality of a rolled hard coil, comprising the steps of:
s1: and (3) reverse uncoiling inspection: after A, B inspectors reach 'position 1' and 'position 2', C inspectors perform reverse uncoiling operation, A, B inspectors perform dynamic and static quality inspection, wherein the position 1 is positioned on the operation side of the steel coil tape head, and the position 2 is positioned on the transmission side of the steel coil;
s2: forward unwind inspection: after A, B inspectors reach 'position 3' and 'position 4', C inspectors perform forward unreeling operation, A, B inspectors perform dynamic and static quality inspection, wherein the position 3 is positioned at the steel coil transmission side and beside the mandrel, and the position 4 is positioned right in front of the steel coil operation;
s3: sampling off-line checking and polishing: a new 3M sand disc is used for inspecting the surface quality of the steel coil for inspecting the outer plate and the head part of the automobile, sampling is carried out on an off-line polishing table for polishing, the length of a sample plate is not less than 600mm, the surface defect of the strip steel is inspected, and the vibration pattern inspection is horizontally polished along the rolling direction of the strip steel;
s4: polishing a production automobile panel: and (3) polishing the whole board surface by adopting the oilstone on line, wherein the polishing area covers the whole board surface.
2. A method of inspecting the surface quality of a rolled hard coil as defined in claim 1, wherein: the dynamic quality inspection content in S1 includes:
a: checking personnel A performs far-view and side-view checking on the surface of the strip steel under the dynamic state of the position 1, including checking the appearance of chromatic aberration, transverse lines and vibration lines and dynamic visual defects until uncoiling is finished;
b: and (3) checking the front view and the side view of the surface of the strip steel by the checking staff B in the dynamic state of the position 2, wherein the checking staff B comprises local defects of roll marks and scratches until the uncoiling is finished.
3. A method of inspecting the surface quality of a rolled hard coil as defined in claim 1, wherein: the static quality inspection content in S1 includes:
a: the inspector A, B wipes the cotton cloth or industrial paper at the position 2 to clean the greasy dirt on the surface of the strip steel, polishes the strip steel by using a 3M sand disc, and observes whether the polished plate surface has defects or not by using different viewing distances and angles;
b: wiping the strip steel with special paper until the surface of the strip steel is clean, wherein the cleaning length is not less than 2 meters; polishing the cleaned strip steel with a 3M sand disc after quality inspection, wherein the polishing length is not less than 2 meters;
c: the surface of the strip steel cannot be polluted in the inspection process, namely, the strip steel is wiped, polished and inspected, and the strip steel is strictly forbidden to be stepped on by feet.
4. A method of inspecting the surface quality of a rolled hard coil as defined in claim 1, wherein: the dynamic quality inspection content in S2 includes:
a: the inspector A performs far-view and side-view inspection on the surface of the strip steel under the dynamic condition of the position 3, including inspection on the appearance of chromatic aberration, transverse lines and vibration lines and dynamic visual defects; after the strip head enters the pinch roll, an inspector A inspects the surface of the strip steel in a front view and a side view under the dynamic state of the position 5, wherein the inspection comprises partial defects of roll marks and scratches until the uncoiling is finished; wherein the position 5 is positioned on the transmission side of the steel coil;
b: and (3) checking the long-sight and side-view of the surface of the strip steel by a checking staff B under the dynamic state of the position 4, wherein the checking staff B checks the large appearance and dynamic visual defects of mountain-like roll marks, chromatic aberration, transverse lines and vibration lines until the uncoiling is finished.
5. A method of inspecting the surface quality of a rolled hard coil as defined in claim 1, wherein: the static quality inspection content in S2 includes:
a: the inspector A, B wipes and cleans greasy dirt on the surface of the strip steel by special paper at the position 6, polishes by using a 3M sand disc, and observes whether the polished plate surface has defects or not by using different viewing distances and angles; wherein the position 6 is positioned at the steel coil operation side;
b: polishing requirements are as follows: the polishing length of the 3M sand disc is not less than 2 meters, and the surface of the strip steel is ensured to be clean before polishing;
c: the surface of the strip steel cannot be polluted in the inspection process, namely, the strip steel is wiped, polished and inspected, and the strip steel is strictly forbidden to be stepped on by feet.
6. A method of inspecting the surface quality of a rolled hard coil as defined in claim 1, wherein: the common plate inspection mode of sampling off-line in S3 is as follows: after the roll is changed, polishing the first roll before the first roll is subjected to shift connection; and (3) checking an outer plate: the outer plate is provided with an inspection table roll which is polished on line by an oilstone and a 3M sand disc by more than two meters.
7. A method of inspecting the surface quality of a rolled hard coil as defined in claim 1, wherein: the polishing content of the automobile panel in S4 comprises the following steps:
a: adopting a 3M sand disc to polish the non-directional requirements;
b: the oilstone is adopted to polish in the parallel rolling direction, the working surface of the oilstone is kept in good contact with the surface of the strip steel, and the polishing is uniformly applied with force, so that continuous, dense and uniform sliding marks are generated on the surface of the strip steel by the oilstone, and the strip steel and the oilstone are kept clean;
c: the checking method comprises the following steps: observing whether defects exist on the polished surface of the strip steel at least in two directions of 45 degrees and 90 degrees with the surface of the strip steel and different viewing distances after polishing is finished;
d: using a 3M sand table to check common defects of strip steel, and polishing by using oilstones to check the defects of vibration lines, transverse stripes, knife marks and longitudinal stripes, wherein the upper and lower surfaces of the strip steel are polished off-line by adopting a horizontal polishing mode;
e: polishing the lower surface by not less than 2 meters;
f: and the upper surface and the lower surface are all polished during sampling and polishing, each time the inspection bench on the panel rolls one sample, the sample is left after polishing, and the sampling length is not less than 600mm multiplied by the plate width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311258214.4A CN117288758A (en) | 2023-09-27 | 2023-09-27 | Method for checking surface quality of rolled hard coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311258214.4A CN117288758A (en) | 2023-09-27 | 2023-09-27 | Method for checking surface quality of rolled hard coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117288758A true CN117288758A (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311258214.4A Pending CN117288758A (en) | 2023-09-27 | 2023-09-27 | Method for checking surface quality of rolled hard coil |
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| Country | Link |
|---|---|
| CN (1) | CN117288758A (en) |
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2023
- 2023-09-27 CN CN202311258214.4A patent/CN117288758A/en active Pending
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