A cooling bed accuracy detection and recovery method

Abstract

An embodiment of the present invention provides a method for detecting and recovering the accuracy of a cooling bed, which relates to the field of steel rolling. The method for detecting and recovering the accuracy of a cooling bed includes: determining the accuracy calibration benchmark of the cooling bed, and the determination process is based on the benchmark determination under the immediate installation state of the cooling bed; calibrating the installation accuracy of the components on the cooling bed, and then calibrating the installation accuracy of the specific components according to the determined benchmark; correcting the movable tooth frame on the cooling bed, and finally adjusting the entire movable tooth frame according to the calibrated accuracy error, so that the installation accuracy of the components on the cooling bed changes. The entire detection and recovery process of the present invention does not require the disassembly of the existing cooling bed structure, which greatly saves detection and recovery time. And through accuracy calibration and comparison, the movable tooth frame is uniformly adjusted to reduce the accuracy error of the components, avoid continuous reduction in the accuracy of the cooling bed, reduce the failure rate, and improve work efficiency and work quality.

Description

Technical Field

[0001] The present invention relates to the field of steel rolling, and in particular to a cooling bed precision detection and recovery method. Background Art

[0002] The cooling bed is one of the indispensable auxiliary equipment in small and medium-sized bar workshops. Its function is to shear the bars into suitable lengths after rolling on the rolling mill through flying shears, transport and unload them onto the cooling bed racks for cooling, and then send them to the output roller table, where they are output by the output roller table for cold shearing into fixed-length finished products.

[0003] The existing cooling beds excessively pursue production capacity during use and can only be maintained briefly during daily downtime. Faced with the accuracy problem of the cooling bed, they can only deal with it temporarily, resulting in a continuous decrease in the accuracy of the cooling bed and frequent failures, which seriously affects the working efficiency and quality of the cooling bed. Summary of the Invention

[0004] The present invention provides a cooling bed precision detection and recovery method, which can quickly perform precision detection and recovery operations, avoid continuous reduction of precision, reduce failures, and improve work efficiency and work quality.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the present invention provides a cooling bed accuracy detection and recovery method, which includes:

[0007] Determine the accuracy calibration benchmark of the cooling bed;

[0008] Check the installation accuracy of components on the cooling bed;

[0009] Correct the movable gear frame on the cooling bed to change the installation accuracy of the components on the cooling bed.

[0010] Optionally, the step of determining the accuracy calibration benchmark of the cooling bed includes: determining the rolling center line; determining the rolling center elevation.

[0011] Optionally, the step of checking the installation accuracy of the components on the cooling bed includes: checking the installation positioning of the high-speed shaft of the cooling bed; and checking the installation positioning of the low-speed shaft of the cooling bed.

[0012] Optionally, the step of checking the installation positioning of the high-speed shaft of the cooling bed includes: determining the horizontal positioning and the height positioning of the high-speed shaft of the cooling bed.

[0013] Optionally, the step of checking the installation positioning of the low-speed shaft of the cooling bed includes: determining the height positioning of the low-speed shaft of the cooling bed.

[0014] Optionally, before the steps of checking the installation and positioning of the high-speed shaft of the cooling bed and checking the installation and positioning of the low-speed shaft of the cooling bed, the step of checking the installation accuracy of the components on the cooling bed further comprises: setting up a temporary bracket.

[0015] Optionally, after the steps of checking the installation and positioning of the high-speed shaft of the cooling bed and the steps of checking the installation and positioning of the low-speed shaft of the cooling bed, the step of checking the installation accuracy of the components on the cooling bed further includes: checking the installation and positioning of the eccentric wheel.

[0016] Optionally, in the step of checking the installation and positioning of the eccentric wheel, there are multiple eccentric wheels, and the multiple eccentric wheels all use the same calibration reference.

[0017] Optionally, the cooling bed accuracy detection and recovery method further includes: adjusting and repairing the movable rack.

[0018] Optionally, in the step of adjusting and repairing the movable rack, the elevation of the rack is reflected by the elevation of the rack on the ground.

[0019] The beneficial effects of the cooling bed accuracy detection and recovery method according to the embodiment of the present invention include, for example:

[0020] The cooling bed accuracy detection and recovery method includes: determining the accuracy calibration benchmark of the cooling bed, and the determination process is based on the benchmark determination in the immediate installation state of the cooling bed; calibrating the installation accuracy of the components on the cooling bed, and then calibrating the installation accuracy of the specific components according to the determined benchmark; correcting the movable tooth frame on the cooling bed, and finally adjusting the entire movable tooth frame according to the calibrated accuracy error, so that the installation accuracy of the components on the cooling bed changes. The entire detection and recovery process of the present invention does not require disassembly of the existing cooling bed structure, which greatly saves detection and recovery time. Through accuracy calibration and comparison, the movable tooth frame is uniformly adjusted to reduce the accuracy error of the components, avoid continuous reduction in the accuracy of the cooling bed, reduce the failure rate, and improve work efficiency and work quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of a flow chart provided in an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the structure of the cooling bed equipment provided in an embodiment of the present invention.

[0024] Icons: 100-cooling bed; 101-rolling centerline; 102-cooling bed entrance; 110-skirt feeding mechanism; 120-main body; 121-moving gear frame; 122-high-speed shaft; 124-low-speed shaft; 130-alignment roller; 140-steel transfer trolley; 150-output roller; 160-driving mechanism; DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be implemented and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0030] The terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0031] Unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0032] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0033] The cooling bed is an essential piece of auxiliary equipment for small and medium-sized bar mills. Its function is to shear bars rolled in the mill into appropriate lengths through a flying shear process. The bars are then transported and unloaded onto the cooling bed racks for cooling, reducing their temperature from 900°C to ~300°C. The cooling bed's unloading device then collects the bars into groups and sends them to the output roller table 150, which then sends them to the cold shear process to cut them into finished products of specified lengths. The design quality and installation accuracy of the cooling bed directly determine the final quality of the finished product.

[0034] Existing cooling beds are overly focused on production capacity during use, and can only be briefly maintained during daily downtime. When faced with precision issues, they can only be dealt with temporarily, resulting in a continuous decrease in precision and frequent failures, which seriously affects the efficiency and quality of the cooling beds. From practical experience, bar cooling beds often have the following common problems after years of disrepair:

[0035] The cooling bed transmission motor or turbine box foot is loose, the high-speed shaft and the low-speed shaft are not installed at 90 degrees, and the deviation is large, causing the motor or turbine box to vibrate and wear more during operation. In severe cases, the motor may burn, the turbine box may scrape teeth, or the transmission shaft may break.

[0036] The horizontal deviation of the low-speed shaft is large. According to on-site measurements, the local position is even greater than 4 / 15000. The parallelism of the two low-speed shafts is locally greater than 10mm, and the height difference between the two shafts is greater than 10mm, causing the moving beam frame of the cooling bed to deviate, the rack to misalign, and the steel to twist and bend when the cooling bed steps forward, seriously affecting the quality of the steel and the stepping rhythm.

[0037] The installation position of the eccentric wheel is seriously out of tolerance. The cumulative deviation of the eccentric wheel of the cooling bed main shaft of some production lines is more than 70mm, causing the entire moving beam to deviate, the moving beam frame to deform, the rack teeth to misalign, and the steel to twist, while affecting the service life of the tug and eccentric wheel.

[0038] The tooth surface of the cooling bed is uneven, the movable teeth and fixed teeth are severely bent and deformed, and the straightness is not uniform. The cooling bed is very easy to get stuck on steel during the stepping process, the production rhythm is slow, and the safety risk of handling the stuck steel is high.

[0039] Please refer to Figure 1-Figure 2 This embodiment provides a cooling bed 100 precision detection and recovery method. The cooling bed 100 precision detection and recovery method provided in the embodiment of the present invention can solve the above problems, which will be described in detail below.

[0040] The cooling bed 100 accuracy detection and restoration method includes: determining an accuracy calibration benchmark for the cooling bed 100; calibrating the installation accuracy of components on the cooling bed 100; and correcting the movable tooth frame 121 on the cooling bed 100. The determination process uses the benchmark as the cooling bed 100 is currently installed, then calibrates the installation accuracy of specific components based on the determined benchmark, and finally adjusts the entire movable tooth frame 121 based on the calibrated accuracy error.

[0041] The entire inspection and recovery process of the present invention does not require disassembly of the existing cooling bed 100 structure, significantly reducing inspection and recovery time. Furthermore, through precision verification and comparison, the movable gear frame 121 is uniformly adjusted, reducing component precision errors, preventing continued degradation of the cooling bed 100 precision, reducing failure rates, and improving work efficiency and quality.

[0042] In this embodiment, the step of determining the accuracy calibration benchmark of the cooling bed 100 includes: determining the rolling center line 101; and determining the rolling center elevation.

[0043] The cooling bed 100 includes a skirt feeding mechanism 110, a main body 120, an alignment roller 130, a steel transfer trolley 140, and a run-out roller 150, which are sequentially arranged. The cooling bed 100 includes a drive mechanism 160, which serves as a power source. A rolling shear is provided on the side of the skirt feeding mechanism 110 away from the main body 120. The cooling bed 100 can select the centerline of any two adjacent shear blades as the rolling centerline 101, and use the closed line of the two adjacent shear blades as the rolling center elevation. This rolling centerline 101 and the rolling center elevation serve as the calibration benchmark.

[0044] Furthermore, the centerline of the main shaft of the skirt feeding mechanism 110 is verified using the rolling centerline 101. The centerline and elevation of the brake plate shaft in the skirt feeding mechanism 110 can be remeasured based on the rolling centerline 101 and the rolling center elevation. The centerline and elevation of the main shaft of the cooling bed 100 are then located using the skirt plate brake plate shaft as a reference. For ease of construction, the centerline can be extended from the skirt plate main shaft centerline to a convenient measurement location. The elevation can be extended from the center of the skirt plate main shaft based on its diameter for easy measurement.

[0045] In this embodiment, the step of checking the installation accuracy of components on the cooling bed 100 includes: checking the installation position of the high-speed shaft 122 of the cooling bed 100; and checking the installation position of the low-speed shaft 124 of the cooling bed 100.

[0046] In this embodiment, the step of checking the installation position of the high-speed shaft 122 of the cooling bed 100 includes: determining the horizontal position and the height position of the high-speed shaft 122 of the cooling bed 100 .

[0047] Horizontal positioning is based on the distance from the cooling bed inlet 102 to the high-speed shaft 122 on the cooling bed 100 as the transmission centerline of the cooling bed 100 (i.e., the position of the centerline of the high-speed shaft 122). To accurately measure the position of the cooling bed inlet 102, positioning can be performed based on the distance from the centerline of the 3# flying shear to the cooling bed inlet 102. After the position of the cooling bed inlet 102 is located, the distance from the high-speed shaft 122 of the cooling bed 100 can be further measured. Finally, a theodolite is used to establish the transmission mechanism installation cross reference line (vertical error <±0.5mm), that is, the horizontal positioning of the high-speed shaft 122 (turbine box).

[0048] Height positioning is based on the midpoint of the skirt roller's outer diameter as the reference elevation ±0. The elevation of the high-speed shaft 122 is further determined by determining the distance between the midpoint of the skirt roller's outer diameter and the high-speed shaft 122, with a required deviation of less than ±0.3mm. Furthermore, the actual centerline of the low-speed shaft 124 can be measured by measuring the distance between the centerline of the low-speed shaft 124 and the centerline of the skirt roller.

[0049] In this embodiment, the step of verifying the installation and positioning of the low-speed shaft 124 of the cooling bed 100 includes determining the height of the low-speed shaft 124 of the cooling bed 100. The height of the low-speed shaft 124 is determined by the height of the high-speed shaft 122, and the elevation of the low-speed shaft 124 can be further determined by the assembly dimensions of the turbine housing. If there are a large number of low-speed shafts 124, the position of another low-speed shaft 124 can be determined based on the center-to-center distance between two parallel lines of the low-speed shafts 124, with a deviation of less than ±1 mm.

[0050] In this embodiment, before checking the installation position of the eccentric wheel and checking the installation position of the high-speed shaft 122 of the cooling bed 100 and checking the installation position of the low-speed shaft 124 of the cooling bed 100, the step of checking the installation accuracy of the components on the cooling bed 100 also includes: setting up a temporary bracket.

[0051] It is worth noting that the following precautions should be taken when installing each shaft: Before maintenance, a level must be set up at the middle transmission mechanism of the cooling bed 100. The level should be used to measure the installation elevation of the transmission shaft symmetrically on both sides. A dedicated person should be assigned to record the original measurement data. The original elevation of the movable rack bottom beam and the movable tooth surface should also be measured. In addition, a theodolite should be added at two opposite corners of the cooling bed 100 to measure whether the installation angle of the cooling bed 100 is 90 degrees. The centerline deviation of the high and low transmission shafts of the cooling bed 100 should be re-measured.

[0052] In this embodiment, after checking the installation and positioning of the high-speed shaft 122 and the low-speed shaft 124 of the cooling bed 100, the step of checking the installation accuracy of the components on the cooling bed 100 further includes: checking the installation and positioning of the eccentric wheel.

[0053] In this embodiment, during the step of verifying the installation and positioning of the eccentric wheel, there are multiple eccentric wheels, and the multiple eccentric wheels all use the same verification reference. This is mainly reflected in the following: when positioning the eccentric wheels, a serial positioning method should be avoided as much as possible, and each position should be positioned based on a single reference, thereby reducing the cyclic cumulative measurement error.

[0054] In this embodiment, the main contents of correcting the movable tooth frame 121 on the cooling bed 100 include: removing the temporary bracket, restoring the movable tooth frame 121, and checking whether the position of the re-positioned and installed eccentric wheel is consistent with the position of the roller box on the movable tooth frame 121. When checking, pay attention to placing the eccentric wheel position at the lowest position first. Since the deformation of the movable tooth frame 121 is relatively large, two methods can be considered for correction, removal and installation; the first method is to initially lower the mobile frame and check the deviation between the position of the roller box and the position of the eccentric wheel. According to the recorded deviation, the mobile frame beam is disassembled, corrected, repaired and then restored; the second method is to remove all the connecting parts between the roller box and the movable beam of the mobile frame, cut off the welds, and place the roller box on the eccentric wheel by temporarily fixing it, and then put it in a correct position so that the roller box remains free after being placed. Then, the deformation of the mobile frame is adjusted by disassembling the connecting position of the roller box, and then the roller box is connected again.

[0055] In this embodiment, the precision detection and restoration method of the cooling bed 100 also includes: adjusting and repairing the movable rack. In this embodiment, in the step of adjusting and repairing the movable rack, the ground elevation of the rack is used to reflect the elevation status of the rack. The specific contents include: detecting the elevation of the top of the movable rack tooth, and adjusting the installation dimensions of the rack and the movable rack bar frame according to the measured data, so that the movable tooth surface meets the technical requirements of the installation. Because the top surface of the movable rack is severely worn, it is not easy to find a relatively standard elevation. It can be considered to use the elevation of the bottom surface of the rack to reflect the elevation status of the rack, and then perform repair adjustments. The rack elevation can be adjusted by adding or subtracting shims to the rack seat connecting the rack beam and the rack. Racks that are severely worn and deformed can be replaced according to the spare parts situation, and some rack wear can be repaired by surfacing.

[0056] Adjusting the elevation is generally accomplished by adding or removing shims from the drive shaft bearing seats. If the elevation error between the dynamic and static rack bottom beams is large, shims of appropriate thickness can be added to the mounting surface of the bottom beam in areas with lower elevations. For areas with higher elevations where shims cannot be removed, the rack installation height can be appropriately lowered (by creating waist-shaped holes in the rack, positioning the rack, and then plug welding).

[0057] According to a cooling bed 100 accuracy detection and recovery method provided in this embodiment, the working principle of the cooling bed 100 accuracy detection and recovery method is as follows:

[0058] The method for detecting and restoring the precision of the cooling bed 100 includes: determining the precision calibration benchmark of the cooling bed 100; calibrating the installation precision of the components on the cooling bed 100; and correcting the movable tooth frame 121 on the cooling bed 100. The determination process is to determine the benchmark under the immediate installation state of the cooling bed 100, and then calibrate the installation precision of the specific components according to the determined benchmark, and finally adjust the entire movable tooth frame 121 according to the calibrated precision error. The entire detection and recovery process of the present invention will not disassemble the existing cooling bed 100 structure, which greatly saves detection and recovery time. And through precision calibration and comparison, the movable tooth frame 121 is uniformly adjusted to reduce the precision error of the components, avoid the continuous reduction of the precision of the cooling bed 100, reduce the failure rate, and improve work efficiency and work quality.

[0059] The cooling bed 100 precision detection and recovery method provided in this embodiment has at least the following advantages: it can quickly perform precision detection and recovery operations, avoid continuous reduction in precision, reduce failures, and improve work efficiency and work quality.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A cooling bed accuracy detection and recovery method, characterized in that: The cooling bed includes a skirt feeding mechanism, a main body, an alignment roller table, a steel transfer trolley and an output roller table which are arranged in sequence; The cooling bed accuracy detection and recovery method includes: Determine the accuracy calibration benchmark of the cooling bed in the immediate installation state, including: determining the rolling center line; determining the rolling center elevation; wherein, a rolling shear is provided on the side of the skirt feeding mechanism away from the main body, and the cooling bed selects the center line of any two adjacent shear blades as the rolling center line, and the closed line of the two adjacent shear blades as the rolling center elevation. This rolling center line and rolling center elevation are used as the accuracy calibration benchmark; Check the installation accuracy of the components on the cooling bed according to the determined accuracy check benchmark, including: determining the horizontal and height positioning of the high-speed axis of the cooling bed; determining the height positioning of the low-speed axis of the cooling bed; and checking the installation positioning of the eccentric wheel; Correct the movable gear frame on the cooling bed to change the installation accuracy of the components on the cooling bed.

2. The cooling bed accuracy detection and recovery method according to claim 1, characterized in that: Before the steps of checking the installation and positioning of the high-speed shaft of the cooling bed and checking the installation and positioning of the low-speed shaft of the cooling bed, the step of checking the installation accuracy of the components on the cooling bed further includes: setting up a temporary bracket.

3. The cooling bed accuracy detection and recovery method according to claim 1, characterized in that: In the step of checking the installation and positioning of the eccentric wheel, there are multiple eccentric wheels, and the multiple eccentric wheels all use the same calibration reference.

4. The cooling bed accuracy detection and recovery method according to claim 1, characterized in that: The cooling bed accuracy detection and recovery method further includes: adjusting and repairing the movable rack.

5. The cooling bed accuracy detection and recovery method according to claim 4, characterized in that: In the step of adjusting and repairing the movable rack, the elevation of the rack is reflected by the elevation of the rack on the ground.

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