CN113102519A - On-line inspection process production line for surface of rolled piece - Google Patents
On-line inspection process production line for surface of rolled piece Download PDFInfo
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- CN113102519A CN113102519A CN202110528106.9A CN202110528106A CN113102519A CN 113102519 A CN113102519 A CN 113102519A CN 202110528106 A CN202110528106 A CN 202110528106A CN 113102519 A CN113102519 A CN 113102519A
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- 238000007689 inspection Methods 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000001931 thermography Methods 0.000 claims abstract description 64
- 238000003384 imaging method Methods 0.000 claims abstract description 35
- 230000007547 defect Effects 0.000 claims abstract description 27
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 239000000523 sample Substances 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 20
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 21
- 239000010959 steel Substances 0.000 abstract description 21
- 230000002950 deficient Effects 0.000 description 5
- 238000005098 hot rolling Methods 0.000 description 4
- 230000003028 elevating effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/34—Arrangements or constructional combinations specifically designed to perform functions covered by more than one of groups B21B39/02, B21B39/14, B21B39/20
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention relates to an online inspection process production line for the surface of a rolled piece, which comprises the following steps: the output roller way is used for connecting the finish rolling equipment and the cooling bed so as to convey the rolled piece processed by the finish rolling equipment to the cooling bed; the centering device is arranged on the output roller way and is used for centering the rolled piece on the output roller way along the moving direction; the thermal imaging device is arranged below the output roller way, an imaging probe is arranged on the thermal imaging device upwards, and a thermal imaging area is formed on the imaging probe and used for thermally imaging the surface of a rolled piece on the output roller way; and the defect judging system is electrically connected with the thermal imaging device to receive the imaged image and judge the defects. The online inspection process production line for the surface of the rolled piece can improve the product yield of a production plant and improve the intelligent operation of a section steel production line.
Description
Technical Field
The invention belongs to the field of hot rolling, and particularly relates to an online inspection process production line for the surface of a rolled piece.
Background
In the field of hot rolling, the rolled piece has a complex cross section. After being rolled out from the rolling mill, the rolled pieces generally have shapes including i-section steel, channel steel, angle steel, H-section steel, and the like. The rolled piece enters the cooling bed through the cooling bed input roller way in the shapes to be cooled, and one side surface of the product always faces the roller way or the lower part of the cooling bed, so that production personnel cannot see the product.
In general, after rolled pieces are rolled out from a finishing mill group, the rolled pieces need to pass through a roller way and a cooling bed, then reach a manual inspection rack after straightening, grouping and sawing, and then can be subjected to surface inspection after turning. This makes the prior art rolled piece surface inspection process generally deficient in several respects: 1) if the rolled piece has defects such as scratches and the like due to roller defects or improper installation of guides and guards, products reaching the cooling bed are usually defective products, and when a subsequent manual inspection rack is used for inspection, a large number of defective products are accumulated, so that a large amount of waste products of the rolled piece are generated, the product yield of a production plant is seriously influenced, the production rhythm is influenced, and the production benefit of the production plant is greatly reduced; 2) if the inspection is manually carried out in the process of cooling the rolled piece, on one hand, the temperature of the rolled piece after being rolled out by the finishing mill group is basically about 850 ℃, the temperature of the regions of the rolled piece after being rolled is higher than that of the regions of the roller way, the cooling bed input roller way and the cooling bed, which pass through the regions, the temperature of the regions is higher due to the heat dissipation of the rolled piece in the cooling process, particularly the temperature of the regions below the cooling bed can reach more than 400 ℃ at the side of the cooling bed input roller way, and the manual inspection cannot be finished at all; on the other hand, even when the rolled piece is cooled to the temperature range which can be checked manually, the working conditions of workers are very poor, the labor intensity is high, and the method is an important link which restricts the intelligent production of the whole section steel production line.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide an online inspection process production line for the surface of a rolled piece, so as to improve the product yield of a production plant and improve the intelligent operation of a section steel production line.
The online inspection process production line for the surface of the rolled piece comprises the following steps: the output roller way is used for connecting the finish rolling equipment and the cooling bed so as to convey the rolled piece processed by the finish rolling equipment to the cooling bed; the centering device is arranged on the output roller way and is used for centering the rolled piece on the output roller way along the moving direction; the thermal imaging device is arranged below the output roller way, an imaging probe is arranged on the thermal imaging device upwards, and a thermal imaging area is formed on the imaging probe and used for thermally imaging the surface of a rolled piece on the output roller way; and the defect judging system is electrically connected with the thermal imaging device to receive the imaged image and judge the defects.
Further, the rolled piece surface online inspection process production line also comprises a signal detection device which is arranged on the output roller way and positioned between the centering device and the cooling bed, wherein the signal detection device is electrically connected with the thermal imaging device so as to detect the end position of the rolled piece through the signal detection device and be used for turning on and off the thermal imaging device.
Further, thermal imaging device still includes the elevating gear of setting on fixed basis, and elevating gear includes: a vertical guide rail connected to the fixed base in a vertical direction; the lifting platform is matched with the vertical guide rail and can move in a lifting way; the imaging probe is arranged on the lifting platform.
Further, the thermal imaging device further comprises a translation device arranged on the fixed base, the translation device comprising: a transverse guide rail connected with the fixed foundation along the vertical direction; and the sliding block is connected with the transverse guide rail in a sliding manner and is fixedly connected with the vertical guide rail.
Further, the thermal imaging apparatus further includes: and the driving device is connected with the lifting platform to drive the lifting platform and/or connected with the sliding block to drive the sliding block.
Further, the drive device is configured as a hydraulic, electric, pneumatic or motor drive.
Further, the imaging probe is a thermal metal detector or a photodetector, the imaging probe is configured as an optical, electrical or opto-electrical combined imaging device, and the thermal imaging device is configured as a continuous imaging device.
Further, the thermal imaging device also comprises a pneumatic purging device and/or a water circulating cooling device.
Furthermore, the online inspection process production line for the surface of the rolled piece also comprises a computer operating system electrically connected with the defect judging system, and a database is also arranged in the computer operating system and used for comparing with thermal imaging so as to judge the surface of the rolled piece.
Further, centering device includes first adjustment wall and second adjustment wall, first adjustment wall and second adjustment wall set up the both sides at the rollout table relatively along the moving direction of rollout table, be formed with centering space between first adjustment wall and the second adjustment wall, the rolled piece can be corrected through centering space to make the length direction of rolled piece be on a parallel with the moving direction of rollout table, wherein, centering space includes and becomes and consecutive entering section and centering section by first adjustment wall and second adjustment wall group, the entry size that gets into the section is greater than the size to the middle section.
Further, the centering device further comprises an adjusting device for adjusting the relative distance between the first adjusting wall and the second adjusting wall to change the width of the centering space, wherein the adjusting device is set to be one of manual adjustment, electric adjustment, hydraulic adjustment and pneumatic adjustment.
The online inspection process production line for the surface of the rolled piece can realize online inspection of the surface of the rolled piece, and compared with the prior art, the online inspection process production line effectively overcomes the technical problem that the defect of the lower surface of the product cannot be found in a high-temperature hot rolling state, so that the defect of the surface of the product can be quickly found in an environment where workers cannot work, and the defective working procedures or equipment can be intelligently judged, thereby reducing the rejection rate, improving the yield of a production workshop and bringing remarkable economic benefit to a production plant. Meanwhile, the number of operators can be reduced, and the intelligent production efficiency of the steel mill is greatly improved.
Drawings
FIG. 1 is a schematic view of the structural connection of a rolled piece surface on-line inspection process line of an embodiment of the present invention;
FIG. 2 is a schematic view of the rolled product surface in-line inspection process line shown in FIG. 1 in the direction A-A;
fig. 3 is a schematic structural view of the thermal imaging apparatus shown in fig. 1.
Detailed Description
For better understanding of the objects, structure and function of the present invention, an online inspection process line for rolled product surfaces of the present invention will be described in further detail with reference to the accompanying drawings.
FIGS. 1-3 illustrate system connection schematics of an in-line inspection process line 100 for the surface of rolled products according to an embodiment of the present invention. As shown in fig. 1 to 3, an online inspection process line 100 for the surface of a rolled piece according to an embodiment of the present invention includes: the output roller table 1 is used for connecting the finish rolling equipment and the cooling bed 2 so as to convey a rolled piece 10 processed by the finish rolling equipment to the cooling bed 2; the centering device 3 is arranged on the output roller way 1, and the centering device 3 is used for centering the rolled piece 10 on the output roller way 1 along the moving direction; the thermal imaging device 4 is arranged below the run-out table 1, the thermal imaging device 4 is upwards provided with an imaging probe 41, and the imaging probe 41 is provided with a thermal imaging area 42 for thermally imaging the surface of the rolled piece 10 on the run-out table 1; and a defect discriminating system (not shown) electrically connected to the thermal imaging device 4 to receive the imaged image and discriminate defects.
When the rolled piece surface online inspection process production line 100 of the embodiment of the invention is in production, the position and the height of the imaging probe 41 of the thermal imaging device 4 are firstly adjusted, so that the thermal imaging area 42 of the thermal imaging device can be adapted to the detection surface of the rolled piece 10. The high-temperature rolled piece 10 is rolled out from a finish rolling device (mill or group) and then conveyed to a cooling bed 2 through a run-out table 1. After passing through the centering device 3 during transport, the rolled stock 10 reaches the run-out table 1 above the thermal imaging device 4. At this time, the thermal imaging device 4 arranged below the run-out table 1 starts to operate to thermally image the surface of the rolled piece 10 on the run-out table 1, and the imaged image is transmitted to a defect determination system (not shown in the figure) for identification, so as to finally perform defect determination on the surface of the rolled piece 10 by means of manual observation determination or automatic model identification matching. If the surface of the rolled piece 10 is found to have defects, a manual or defect judging system gives an alarm and reminds production operators to stop rolling, the operators stop rolling immediately after receiving the defect judging alarm, judge equipment with defects according to the positions of the defects, check and replace the equipment in time, the rejection rate is reduced, and the product yield is improved.
Through the arrangement, the rolled piece surface online inspection process production line 100 provided by the embodiment of the invention can realize online inspection of the surface of the rolled piece 10, and compared with the prior art, the technical problem that the defect of the lower surface of the product cannot be found in a high-temperature hot rolling state is effectively overcome, so that the defect of the surface of the product can be quickly found in an environment where people cannot work, and the defective process or equipment can be intelligently judged, thereby reducing the rejection rate, improving the yield of a production workshop and bringing remarkable economic benefits to a production plant. Meanwhile, the number of operators can be reduced, and the intelligent production efficiency of the steel mill is greatly improved.
It should be noted that the thermal imaging device 4 in the present application can be configured to accommodate the temperature of the rolled stock 10 above 400 ℃. The rolled piece surface on-line inspection process production line 100 can be suitable for all profile steel products by arranging the centering device 3, is not limited to common I-steel, channel steel, angle steel and H-shaped steel, and also comprises steel rails, steel sheet piles, B-shaped steel and other profile steel products with complex sections. Through carrying out the setting of adaptability to thermal imaging device 4's position in this application, can make the rolled piece surface on-line inspection technology production line 100 of this application not only be applicable to the defect inspection judgement of shaped steel product lower surface, also can set up thermal imaging device 4 according to the different surfaces that the product need inspect to carry out arbitrary surface heat inspection.
In the preferred embodiment shown in fig. 1, the rolled product surface on-line inspection process line 100 may further include a signal detection device 5 disposed on the run-out table 1 between the centering device 3 and the cooling bed 2. Wherein the signal detection device 5 is electrically connected to the thermal imaging device 4 for detecting the end position of the rolling stock 10 by means of the signal detection device 5 for switching the thermal imaging device 4 on and off.
Specifically, when the rolled piece surface online inspection process production line 100 of the embodiment of the invention is in use, the end of the rolled piece 10 firstly triggers the signal detection device 5, and the signal detection device 5 sends a signal to the thermal imaging device 4, so that the thermal imaging device 4 performs delayed operation within a preset time. Specifically, after receiving a signal sent by the signal detection device 5, the thermal imaging device 4 arranged below the run-out table 1 can start continuous thermal imaging operation on the rolled piece 10 after setting a delay (s/v) for seconds according to the rolling speed v (m/s) of the finish rolling equipment and the distance s (m) between the detection device 5 and the thermal imaging device 4, and transmit an imaged image to the defect identification system for identification. When the tail end of the hot rolled piece 10 leaves the detection signal device 5, the signal detection device 5 can send out a signal again, and the thermal imaging device 4 can be set to stop working after delaying for 1-2 seconds after receiving the signal until the next hot rolled piece 10 starts to work again after triggering the signal detection device 5. By this arrangement, the imaging of the thermal imaging device 4 can be made more accurate, and the presence of useless imaging information in the image can be effectively avoided, thereby causing interference to defect discrimination.
Preferably, the signal detection device 5 can be a metal detector or a photodetector for detecting the end of the rolled stock 10.
In the preferred embodiment shown in fig. 2 and 3, the thermal imaging device 4 may further include a lifting device 43 disposed on the fixed base, the lifting device 43 including: a vertical guide rail 431 connected to the fixed base in a vertical direction; and a lifting platform 432 which is matched with the vertical guide rail 431 and can move in a lifting way; the imaging probe 41 is disposed on the elevating platform 432. Also preferably, the thermal imaging device 4 may further comprise a translation device 44 disposed on the fixed base, the translation device 44 comprising: a transverse guide rail 441 connected to the fixed base in a vertical direction; and a slider 442 slidably coupled to the lateral guide 441 and fixedly coupled to the vertical guide 431.
The imaging probe 41 of the thermal imaging device 4 mentioned in the present application can be adjusted in focal length according to the specification of the rolled product 10. The lifting device 43 and/or the translation device 44 mentioned in the present application can be adjusted by means of manual operation or by means of a drive device.
With the above arrangement, the detection range of the imaging probe 41 of the thermal imaging device 4 in the embodiment of the present invention can be selected according to the width of the largest-sized section steel produced in the entire plant. The thermal imaging device 4 in the embodiment of the invention is provided with the lifting device 43 and the translation device 44, so that the thermal imaging device 4 can be adjusted in height according to different types of section steel products, the distance between the imaging probe 41 and the lower surface of the rolled piece 10 can be adjusted in applicability, and the imaging definition of the thermal imaging device 4 is improved. At the same time, the traversing by the translation device 44 can also be performed according to the position of the rolled product 10 so that the imaging probe 41 is arranged at a suitable position.
In a preferred embodiment, the thermal imaging device 4 may further comprise: drive means (not shown) connected to the lifting platform 432 for driving same and/or to the slide 442 for driving same. Also preferably, the drive means may be configured as a hydraulic, electric, pneumatic or motor drive. By the arrangement, the online inspection process production line 100 for the surface of the rolled piece can realize intelligent and automatic online adjustment and detection, so that the online inspection process production line 100 for the surface of the rolled piece is more convenient to operate.
In a preferred embodiment, the imaging probe 41 may be configured as an optical, electrical or opto-electronic combined imaging device, and the thermal imaging device 4 is configured as a continuous imaging device. Further preferably, the thermal imaging device 4 may further include a pneumatic purging device (not shown in the figure) and/or a water cooling device (not shown in the figure), so that in a high-temperature environment, the influence of high temperature on the imaging probe 41 can be reduced, and the stability of the imaging effect can be ensured.
In a preferred embodiment, the product surface on-line inspection process line 100 may further include a computer operating system (not shown) electrically connected to the defect identification system, and a database is provided in the computer operating system for comparison with thermal imaging to identify the surface of the product 10.
Returning to fig. 1, preferably, the centering device 3 may include a first adjusting wall 31 and a second adjusting wall 32, the first adjusting wall 31 and the second adjusting wall 32 are oppositely disposed on both sides of the run-out table 1 along the moving direction of the run-out table 1, a centering space is formed between the first adjusting wall 31 and the second adjusting wall 32, and the rolled piece 10 can be centered by the centering space so that the length direction of the rolled piece 10 is parallel to the moving direction of the run-out table 1. The centering space comprises an inlet section and a centering section which are formed by a first adjusting wall 31 and a second adjusting wall 32 and are sequentially connected, and the size of an inlet of the inlet section is larger than that of the centering section.
Through the arrangement, on one hand, the rolled piece surface online inspection process production line 100 provided by the embodiment of the invention can center and convey the rolled piece 10 by arranging the centering device 3, so that the rolled piece 10 can pass through the thermal imaging area 42 of the thermal imaging device 4 more accurately, and the accuracy of the thermal imaging image can be effectively ensured; on the other hand, the centering device 3 of the embodiment of the invention can enable the rolled piece 10 to enter the centering space better through setting the inlet size of the entry section and the outlet size of the exit section to be larger than the size of the middle section, thereby ensuring the stability of the movement of the rolled piece 10.
In a preferred embodiment, the centering device 3 may further include an adjusting device (not shown in the figure) for adjusting the relative distance between the first adjusting wall 31 and the second adjusting wall 32 to change the width of the centering space, and the adjusting device is configured to be one of manually adjusted, electrically adjusted, hydraulically adjusted, and pneumatically adjusted.
Adjusting device accessible in this application is fixed in the swivel nut in the frame and constitutes with swivel nut threaded connection's screw rod by two sets at least that set up relatively, and the drive end of screw rod links to each other with first adjustment wall 31 and second adjustment wall 32, drives the screw rod through manual adjustment, electronic adjustment, hydraulic pressure adjustment, pneumatic adjustment to the width size of adjustment centering space. Through the arrangement, the centering device 3 provided by the embodiment of the invention can be more intelligently adapted to rolled pieces 10 with different specifications and widths.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "lateral," "upper," "lower," "vertical," "horizontal," and the like refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. An online inspection process production line for the surface of rolled pieces, comprising:
the output roller way is used for connecting the finish rolling equipment and the cooling bed so as to convey the rolled piece processed by the finish rolling equipment to the cooling bed;
the centering device is arranged on the output roller way and is used for centering the rolled piece on the output roller way along the moving direction;
the thermal imaging device is arranged below the output roller way, an imaging probe is arranged on the thermal imaging device in an upward mode, and a thermal imaging area is formed in the imaging probe and used for thermally imaging the surface of a rolled piece on the output roller way; and
a defect discrimination system electrically connected to the thermal imaging device to receive the imaged image and to perform defect discrimination.
2. An online inspection process production line for the surface of a rolled piece according to claim 1, further comprising a signal detection device disposed on the run-out table between the centering device and the cooling bed, wherein the signal detection device is electrically connected to the thermal imaging device for detecting the end of the rolled piece by the signal detection device for turning the thermal imaging device on and off.
3. An in-line inspection process production line for the surface of rolled products according to claim 1, characterized in that the thermal imaging device further comprises a lifting device disposed on a fixed base, the lifting device comprising: a vertical guide rail connected to the fixed base in a vertical direction; the lifting platform is matched with the vertical guide rail and can move in a lifting way; the imaging probe is arranged on the lifting platform.
4. A product surface on-line inspection process line in accordance with claim 3, wherein the thermal imaging device further comprises a translation device disposed on a fixed base, the translation device comprising: a transverse guide rail connected to the fixed base in a vertical direction; and the sliding block is connected with the transverse guide rail in a sliding manner and fixedly connected with the vertical guide rail.
5. A product surface on-line inspection process line as set forth in claim 4, wherein the thermal imaging device further comprises: and the driving device is connected with the lifting platform to drive the lifting platform and/or connected with the sliding block to drive the sliding block.
6. A rolling stock surface online inspection process production line according to any one of claims 1 to 5, characterized in that the imaging probe is configured as an optical, electrical or opto-electrical combined imaging device and the thermal imaging device is configured as a continuous imaging device.
7. A product surface on-line inspection process line according to claim 6, characterized in that the thermal imaging device further comprises a pneumatic purge device and/or a ring water cooling device.
8. A rolled piece surface online inspection process production line according to any one of claims 1-5, characterized in that the rolled piece surface online inspection process production line further comprises a computer operating system electrically connected with the defect discrimination system, and a database is further provided in the computer operating system for comparison with the thermal imaging for discrimination of the rolled piece surface.
9. A rolled piece surface on-line inspection process production line according to any one of claims 1 to 5, characterized in that the centering device comprises a first adjusting wall and a second adjusting wall, the first adjusting wall and the second adjusting wall are oppositely arranged on two sides of the run-out table along the moving direction of the run-out table, a centering space is formed between the first adjusting wall and the second adjusting wall, the rolled piece can be corrected through the centering space, so that the length direction of the rolled piece is parallel to the moving direction of the run-out table, wherein the centering space comprises an entry section and a centering section which are composed of the first adjusting wall and the second adjusting wall and are connected in sequence, and the entry section has an entry dimension larger than the size of the centering section.
10. The product line for an in-line inspection process of a product surface of a rolling stock of claim 9, wherein the centering device further comprises an adjustment device for adjusting a relative distance of the first adjustment wall and the second adjustment wall to change a width of the centering space, the adjustment device being configured for one of manual adjustment, electrical adjustment, hydraulic adjustment, and pneumatic adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110528106.9A CN113102519A (en) | 2021-05-14 | 2021-05-14 | On-line inspection process production line for surface of rolled piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110528106.9A CN113102519A (en) | 2021-05-14 | 2021-05-14 | On-line inspection process production line for surface of rolled piece |
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| CN113102519A true CN113102519A (en) | 2021-07-13 |
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| CN202110528106.9A Pending CN113102519A (en) | 2021-05-14 | 2021-05-14 | On-line inspection process production line for surface of rolled piece |
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Application publication date: 20210713 |