A detection and repair method and detection device for the matching surface of the bending roll cylinder of a plate and strip rolling mill

Abstract

The present invention discloses a detection device for the mating surface of a bending roll cylinder of a plate and strip rolling mill, comprising a reference plate, a Y-axis ruler, an X-axis ruler and a Z-axis ruler; the reference plate comprises a first reference plate and a second reference plate, the first reference plate and the second reference plate are arranged parallel to each other; the Y-axis ruler comprises a first Y-axis ruler and a second Y-axis ruler, the first Y-axis ruler is fixed to the first reference plate and is parallel to the first reference plate, the second Y-axis ruler is fixed to the second reference plate and is parallel to the second reference plate; one end of the X-axis ruler is connected to the first Y-axis ruler, the other end of the X-axis ruler is connected to the second Y-axis ruler, the X-axis ruler can slide along the first Y-axis ruler and the second Y-axis ruler; the Z-axis ruler is arranged on the X-axis ruler and can slide along the X-axis ruler. The present invention also discloses a detection and repair method for the mating surface of a bending roll cylinder of a plate and strip rolling mill. The present invention obtains the amount of damage of each mating surface by detecting the mating surface, providing a basis for repair.

Description

Technical Field

[0001] The present invention relates to the technical field of material repair, and in particular to a detection and repair method and a detection device for the matching surface of a bending roll cylinder of a plate and strip rolling mill. Background Art

[0002] The bending roll cylinder is fixed on the frame arch of the plate and strip rolling mill, and controls the roll shape of the working roll of the plate and strip rolling mill to ensure the shape and accuracy of the rolled plate. The frame arch has matching surfaces corresponding to multiple spatial positions of the bending roll cylinder, with a complex structure and high precision requirements. Due to the severe vibration and impact and variable load during rolling, the matching surface and threaded hole will gradually lose precision after working for a certain period of time due to the wear and tear of the matching surface and threaded hole, thus affecting the stability of the steel rolling operation, and affecting product quality and safe production.

[0003] The plate and strip rolling mill site is in a humid, oxidative and high temperature environment for a long time, and the bending roll cylinder mating surface is corroded and worn, and some threaded holes are corroded, resulting in thread slippage or bolt breakage. Before replacing a new bending roll cylinder, the corroded and worn parts of the bending roll cylinder mating surface and the damaged threaded holes on the frame arch need to be repaired to ensure the position accuracy of the bending roll cylinder after installation.

[0004] In the prior art, the mating surface of the bending roller cylinder is repaired by the following methods: 1. Machining removal method: that is, the mating surface is directly cut by online machining method, and then the lining plate of suitable thickness is selected according to the removed size to adjust to the required accuracy. Since the damage of each mating surface is inconsistent, there are many lining plates of different thicknesses, which causes inconvenience to production and use. Moreover, when the number of processing times is too many, it affects the strength and rigidity of the frame arch. 2. Repair welding machine addition method: machining is performed to restore the accuracy after the mating surface is surfacing. The selection of materials and processes is relatively simple. The repaired mating surface will wear again under the action of impact and corrosion, and the wear problem cannot be fundamentally solved. 3. Polymer composite material repair: The polymer composite material repair technology is used for on-site repair. The bonding method for the composite material and the substrate to produce adhesion is physical bonding, which is still insufficient under the working conditions of various composite forces.

[0005] The threaded holes are repaired by the following methods: 1. Simple tapping of the threaded holes; 2. Filling the threaded holes with electric welding, and then drilling and tapping. This method generally uses ordinary carbon steel welding materials that are soft and easy to drill, which are consistent with the mechanical properties of the substrate and are used in the short term. If high-strength welding materials are used to fill the holes, it is difficult to complete the drilling and tapping on site, which makes the repair very difficult and delays the construction period; 3. The threaded sleeve is inserted into the sleeve. The outer circle of the sleeve has a full thread mode and a threadless tight fit mode. This type of repair can meet the needs of general thin plate continuous rolling, but on medium and thick plate lines, due to the large impact load, the sleeve is prone to slippage under the combined effect of corrosion of the substrate and micro-creep of the sleeve.

[0006] Due to the damage of the threaded hole, the mating surface lacks the original positioning reference and cannot be accurately measured, which causes corresponding deviations in the size and form and position tolerance detection of each working surface that cooperates with the bending roll cylinder. The subsequent on-site repair processing volume is difficult to accurately control, and the bending roll cylinder can only be repeatedly tested while processing. This can easily cause the repair of some mating surfaces to fail to meet the use requirements, affecting the use accuracy of the bending roll cylinder, thereby affecting the quality of the rolled products and also affecting the safe use of the frame arch. Summary of the invention

[0007] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent. To this end, one purpose of the present invention is to provide a detection device for the mating surface of the bending roll cylinder of a plate and strip rolling mill, by detecting the mating surface, obtaining the damage amount of each mating surface, and providing a basis for repair.

[0008] The second purpose of the present invention is to propose a method for detecting and repairing the mating surface of the bending roller cylinder of a plate and strip rolling mill, so as to improve the repair quality and precision control of the mating surface of the bending roller cylinder, improve operation efficiency, shorten operation period, and reduce operation safety risks.

[0009] To achieve the above-mentioned purpose, the first embodiment of the present invention provides a detection device for the mating surface of a bending roll cylinder of a plate and strip rolling mill, comprising a reference plate, a Y-axis ruler, an X-axis ruler and a Z-axis ruler;

[0010] The reference plate includes a first reference plate and a second reference plate, the first reference plate and the second reference plate are arranged parallel to each other, and the first reference plate and the second reference plate are used to be fixed on the matching surface;

[0011] The Y-axis scale comprises a first Y-axis scale and a second Y-axis scale, wherein the first Y-axis scale is fixed on the first reference plate and is parallel to the first reference plate, and the second Y-axis scale is fixed on the second reference plate and is parallel to the second reference plate;

[0012] One end of the X-axis scale is connected to the first Y-axis scale, and the other end of the X-axis scale is connected to the second Y-axis scale. The X-axis scale can slide along the first Y-axis scale and the second Y-axis scale, and can be fixed on the first Y-axis scale and the second Y-axis scale;

[0013] The Z-axis ruler is arranged on the X-axis ruler and can slide along the X-axis ruler, and at the same time, the Z-axis ruler can slide along the Z-axis.

[0014] According to the detection device for the mating surface of the bending roller cylinder of a plate and strip rolling mill according to the embodiment of the present invention, during detection, the reference plate is first fixed on the mating surface, such as the mating surface of the bending roller cylinder, and then the Y-axis ruler, X-axis ruler and Z-axis ruler are installed. Since the X-axis ruler can slide along the first Y-axis ruler and the second Y-axis ruler, the Z-axis ruler is set on the X-axis ruler and can slide along the X-axis ruler, and the Z-axis ruler can slide along the Z-axis, so that the Z-axis ruler can move in three dimensions, and the scales are provided with scales to facilitate the measurement of the damage amount of the inner surface and the threaded hole of the bending roller cylinder, thereby providing a basis for repair.

[0015] In addition, the detection device for the matching surface of the bending cylinder of a plate and strip rolling mill according to the above embodiment of the present invention may also have the following additional technical features:

[0016] Furthermore, it also includes a fixing member, which is arranged on the reference plate and fixes the reference plate on the matching surface.

[0017] Furthermore, a bolt hole is arranged on the reference plate; the fixing member is a tapered screw rod, and the tapered screw rod passes through the bolt hole to fix the reference plate on the matching surface.

[0018] Furthermore, the bolt hole is consistent in size with the threaded hole set on the matching surface, the bolt hole is Y-shaped, the lower part of the bolt hole is a straight hole, the upper part of the bolt hole is a tapered hole, and the depth of the tapered hole is equal to half the depth of the straight hole.

[0019] Furthermore, a thread is arranged at the lower part of the tapered screw, a tapered protrusion is arranged at the middle part, the tapered protrusion corresponds to the tapered hole, and the top part is a hexagonal head rotating part.

[0020] Furthermore, a gasket is arranged between the reference plate and the matching surface.

[0021] Furthermore, the X-axis scale is fixed to the first Y-axis scale and the second Y-axis scale by means of a top screw.

[0022] Furthermore, the first Y-axis scale is fixed to the first reference plate via positioning pins, and the second Y-axis scale is fixed to the second reference plate via positioning pins.

[0023] To achieve the above-mentioned purpose, a second embodiment of the present invention provides a method for detecting and repairing the mating surface of a bending cylinder of a plate and strip rolling mill, comprising the following steps:

[0024] First, disassemble the bending roll cylinder, clean the mating surface area of ​​the bending roll cylinder to be repaired and the damaged threaded holes, detect and confirm the damage and number of the threaded holes, remove the broken bolts from the threaded holes, and remove the sludge impurities on the surface to be processed;

[0025] Second, select one of the matching surfaces and non-matching surfaces of the bending roller cylinder in turn, and use a laser tracking measuring instrument to detect the center line, symmetry, verticality and window size of the matching surface and the non-matching surface. Select the non-repaired matching surface as the reference surface, and use an outside micrometer to check and verify. Calculate the actual wear of each matching surface based on the measurement data of the laser tracking measuring instrument and the manual measurement data;

[0026] 3. Prefabricate the thread sleeve, wherein the inner wall of the thread sleeve is provided with an internal thread, and the outer wall of the thread sleeve is provided with an external thread;

[0027] 4. Threaded hole repair:

[0028] a. Select the threaded holes on the mating surface of the bending roll cylinder, use the above detection device to detect the center distance of the threaded holes, and draw out the center line of each threaded hole, and disassemble the above detection device;

[0029] b. According to the center line of each threaded hole, drill and tap the damaged threaded holes on all assembly surfaces according to the depth of the threaded holes and the standard size of the external threads of the prefabricated thread sleeves;

[0030] c. Install the prefabricated thread sleeve, use the above detection device to detect the center distance of the threaded hole again, and disassemble the above detection device;

[0031] 5. After all the damaged threaded holes are repaired, the above-mentioned detection device is used to detect the dimensional tolerance and form and position tolerance of each surface that matches the bending roller cylinder to confirm the damage amount of each matching surface;

[0032] Sixth, the fatigue layer of each mating surface is cleaned by boring and milling machine, and the deeper area is processed by clamp repair;

[0033] 7. Reproduction treatment: Use welding materials with similar materials to the base material to manually build up the base surface of each mating surface, use the above-mentioned detection device to detect the matching, determine the cladding amount of each different mating surface, and determine the thickness of the bottom layer;

[0034] 8. All the mating surfaces are restored by boring and milling machines, and the bolt holes on the reference plate are used as the center and the reference surface for alignment during processing;

[0035] 9. All mating surfaces are based on the design dimensions of the center distance of the bolt holes on both sides and the reference surface. The above-mentioned detection device is used in conjunction with a micrometer and caliper to re-check the dimensional tolerance and form and position tolerance of all mating surfaces.

[0036] According to the detection and repair method of the mating surface of the bending roller cylinder of a plate and strip rolling mill according to an embodiment of the present invention, during repair, the reference plate is first fixed on the mating surface of the bending roller cylinder, and then the Y-axis ruler, X-axis ruler and Z-axis ruler are installed. Since the X-axis ruler can slide along the first Y-axis ruler and the second Y-axis ruler, the Z-axis ruler is set on the X-axis ruler and can slide along the X-axis ruler, and the Z-axis ruler can slide along the Z-axis, so that the Z-axis ruler can move in three dimensions, and scales are set on the rulers to facilitate the measurement of the damage amount of the inner surface and the threaded hole of the bending roller cylinder, thereby providing a basis for repair.

[0037] In addition, the detection and repair method for the mating surface of the bending cylinder of a plate and strip rolling mill proposed in the above embodiment of the present invention may also have the following additional technical features:

[0038] Furthermore, the wire sleeve is a stainless steel wire sleeve; the outer wall of the stainless steel wire sleeve is also provided with a non-threaded portion, and the axial length of the non-threaded portion is equal to three to five times the pitch width of the external thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of a device for detecting the matching surface of a bending cylinder of a plate and strip rolling mill according to an embodiment of the present invention;

[0040] Figure 2 It is a cross-sectional view of a detection device for the matching surface of a bending cylinder of a plate and strip rolling mill according to an embodiment of the present invention;

[0041] Figure 3 It is a schematic diagram of the structure in which a tapered screw is fixed to a reference plate according to an embodiment of the present invention;

[0042] Figure 4 It is a schematic diagram of the structure in which a detection device according to an embodiment of the present invention is fixed on a roll bending cylinder;

[0043] Figure 5 It is a schematic diagram of the structure in which a reference plate is fixed on a roll bending cylinder according to an embodiment of the present invention;

[0044] Figure 6 is a schematic structural diagram of a roll bending cylinder according to an embodiment of the present invention;

[0045] Figure 7 is a schematic structural diagram of a roll bending cylinder at another angle according to an embodiment of the present invention;

[0046] Figure 8 A schematic diagram of the structure of a silk sleeve according to an embodiment of the present invention;

[0047] Fig. 9 It is a schematic diagram of the structure in which a wire sleeve is fixed on a bending roller cylinder according to an embodiment of the present invention.

[0048] Description of symbols

[0049] Reference plate 1 First reference plate 11

[0050] Second reference plate 12 Bolt hole 13

[0051] Straight hole 131 Conical hole 132

[0052] Y-axis scale 2 First Y-axis scale 21

[0053] Second Y-axis scale 22 Positioning pin 23

[0054] X-axis scale 3 X-axis scale seat 31

[0055] Copper gasket 311 top screw 32

[0056] Z axis scale 4 Z axis scale seat 41

[0057] Fixing 5 Washer 6

[0058] Bending roller cylinder 7 Matching surface 71

[0059] Screw hole 72 Screw hole 72a

[0060] Screw hole 72b Detection surface 73a

[0061] Detection surface 73b Detection surface 73c

[0062] Detection surface 73d Side surface 74a

[0063] Side surface 74b Top surface 75

[0064] Thread sleeve 8 Internal thread 81

[0065] The external thread 82 has no threaded portion 83 . DETAILED DESCRIPTION

[0066] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0067] like Figures 1 to 9 As shown, a detection device for the mating surface of a bending cylinder of a plate and strip rolling mill according to an embodiment of the present invention includes a reference plate 1, a Y-axis scale 2, an X-axis scale 3 and a Z-axis scale 4.

[0068] The reference plate 1 includes a first reference plate 11 and a second reference plate 12, which are arranged parallel to each other, and are used to be fixed on a matching surface, such as a matching surface of a bending roller cylinder, for detection. Usually, the first reference plate 11 and the second reference plate 12 can be plate-shaped, and the size of the first reference plate 11 is equal to the size of the second reference plate 12.

[0069] The Y-axis scale 2 includes a first Y-axis scale 21 and a second Y-axis scale 22. The first Y-axis scale 21 is fixed on the first reference plate 11 and is parallel to the first reference plate 11. The second Y-axis scale 22 is fixed on the second reference plate 12 and is parallel to the second reference plate 12. The first Y-axis scale 21 can be fixed on the first reference plate 11 by two locating pins 23, and the second Y-axis scale 22 can also be fixed on the second reference plate 12 by another two locating pins 23 to facilitate the fixing of the Y-axis scale 2. The first Y-axis scale 21 and the second Y-axis scale 22 are both provided with scales, and the first Y-axis scale 21 and the second Y-axis scale 22 can be consistent to facilitate measurement.

[0070] One end of the X-axis scale 3 is connected to the first Y-axis scale 21, and the other end of the X-axis scale 3 is connected to the second Y-axis scale 22. The X-axis scale 3 can slide along the first Y-axis scale 21 and the second Y-axis scale 22, and can be fixed on the first Y-axis scale 21 and the second Y-axis scale 22. The two ends of the X-axis scale 3 can be fixed on the Y-axis scale 2 through the X-axis scale scale seat 31, so that the X-axis scale scale seat 31 can slide on the Y-axis scale 2, which is convenient for the sliding of the X-axis scale 3. A copper gasket 311 can be placed in the X-axis scale scale seat 31 to facilitate tightening, thereby reducing the gap and improving stability. There are scales on the X-axis scale 3. Among them, the X-axis scale 3 can be fixed on the first Y-axis scale 21 and the second Y-axis scale 22 by a top screw 32. When the X-axis scale 3 slides to a certain position, it can be fixed by the top screw 32 to prevent the X-axis scale 3 from continuing to slide, which is convenient for measuring data.

[0071] The Z-axis scale 4 is arranged on the X-axis scale 3 and can slide along the X-axis scale 3. At the same time, the Z-axis scale 4 can slide along the Z-axis. The Z-axis scale 4 can be arranged on the X-axis scale 3 through the Z-axis scale seat 41. The Z-axis scale seat 41 is convenient for sliding on the X-axis scale 3 to realize that the Z-axis scale 4 can slide along the X-axis scale 3. In addition, the Z-axis scale 4 can also slide along the Z-axis itself, that is, it can slide along the plane perpendicular to the Y-axis scale 2 and the X-axis scale 3 to realize three-dimensional measurement data, wherein the Z-axis scale 4 is provided with a scale to facilitate measurement.

[0072] During the inspection, first fix the reference plate 1 on the mating surface, such as the mating surface of the bending roller cylinder. The first reference plate 11 can be fixed on one side of the mating surface, and the second reference plate 12 can be fixed on the other side of the mating surface. The depression between the two sides of the mating surface forms the inner side surface to be measured. Next, install the Y-axis ruler 2, the X-axis ruler 3 and the Z-axis ruler 4. Since the X-axis ruler 3 can slide along the first Y-axis ruler 21 and the second Y-axis ruler 22, the Z-axis ruler 4 is set on the X-axis ruler 3 and can slide along the X-axis ruler 3. The Z-axis ruler 4 can slide along the Z axis, so that the Z-axis ruler 4 can move in three dimensions, and the scales are set with scales to facilitate the measurement of the damage amount of the inner side surface and the threaded hole of the bending roller cylinder, thereby providing a basis for repair.

[0073] Optionally, the detection device may further include a fixing member 5, which is disposed on the reference plate 1 and fixes the reference plate 1 on the mating surface. The reference plate 1 may be provided with a bolt hole 13; the fixing member 5 may be a tapered screw, which passes through the bolt hole 13 to fix the reference plate 1 on the mating surface. When fixing, the tapered screw is passed through the bolt hole 13 and tightened to firmly fix the reference plate 1 on the mating surface, so as to facilitate measurement.

[0074] In some examples, the bolt hole 13 is the same size as the threaded hole set on the mating surface, the bolt hole 13 is Y-shaped, the lower part of the bolt hole 13 is a straight hole 131, the upper part of the bolt hole 13 is a tapered hole 132, and the depth of the tapered hole 132 is equal to half the depth of the straight hole 131. Among them, the lower part of the tapered screw is provided with a thread 31, the middle part is provided with a tapered protrusion 32, the tapered protrusion 32 corresponds to the tapered hole 132, and the top is a hexagonal head rotating part 33. When fixing, the thread 31 of the tapered screw is connected to the straight hole 131, and the tapered protrusion 32 of the tapered screw is against the tapered hole 132. The hexagonal head rotating part 33 is convenient for tightening with a tool to firmly fix the reference plate 1 on the mating surface, so that the measurement data is accurate.

[0075] In order to prevent the reference plate 1 from being separated from the mating surface during the measurement process, a washer 6 can be arranged between the reference plate 1 and the mating surface. The washer 6 prevents the tapered screw from being easily separated from the bolt hole 13, thereby improving stability.

[0076] The present invention also proposes a method for detecting and repairing the mating surface of a bending roll cylinder of a plate and strip rolling mill, comprising the following steps:

[0077] First, disassemble the bending roll cylinder 7, such as disassembling the bending roll cylinder 7 from the rolling mill frame arch, clean the mating surface 71 area of ​​the bending roll cylinder 7 to be repaired and the damaged part of the threaded hole 72, detect and confirm the damage condition and number of the threaded holes 72, remove the broken bolts from the threaded holes 72, and remove the sludge impurities on the surface to be processed.

[0078] Second, select one of the mating surface 71 and the non-mating surface of the bending roller cylinder 7 in turn, and use a laser tracking measuring instrument to detect the center line, symmetry, verticality and window size of the mating surface 71 and the non-mating surface, select the non-repaired mating surface as the reference surface, and use an outside micrometer to check and verify, and calculate the actual wear amount of each mating surface 71 based on the measurement data of the laser tracking measuring instrument and the manual measurement data, wherein the laser tracking measuring instrument is a prior art and will not be described here.

[0079] Third, prefabricate the thread sleeve 8, the inner wall of the thread sleeve 8 is provided with an internal thread 81, and the outer wall of the thread sleeve 8 is provided with an external thread 82.

[0080] Fourth, repair of threaded hole 72:

[0081] a. Select the threaded hole 72 on the mating surface 71 of the bending roller cylinder 7, use the above detection device to detect the center distance of the threaded hole 72, and draw the center line of each threaded hole 72, and disassemble the above detection device. During the detection, the taper screw of the above detection device can be tightly fixed on the mating surface 71, and the taper screw 20 can be installed on the other bolt holes 13 on the reference plate 1 without tightening, so as to fine-tune the parallelism of the reference plate 1. Check the center distance and parallelism of the bolt holes 13 of the reference plates 1 on both sides.

[0082] b. After the hole center distance and parallelism meet the requirements of the drawing, the center line of each bolt hole 13 is drawn out from the bolt hole 13 of the reference plate 1, so as to prepare for the determination of the center hole of the threaded hole 72 of the archway matching surface 71. According to the center line drawn out of each threaded hole 72, the damaged threaded holes 72 of all assembly surfaces are drilled and tapped according to the depth of the threaded hole 72 and the standard size of the external thread 82 of the prefabricated thread sleeve 8. Among them, a 60° groove can be opened at the outer end of the threaded hole 72 to facilitate fixing by welding.

[0083] c. Install the prefabricated thread sleeve 8, and use the above detection device to detect the center distance of the threaded hole 72 again, and disassemble the above detection device to measure the center distance of the threaded holes 72 on both sides to determine that the threaded holes 72 after installation are within the controllable range.

[0084] Whether the above-mentioned threaded holes 72 are within the controllable range: two bolt holes 13 of one side of the reference plate 1 can be selected, and the threaded holes 72 of the mating surface 71 body and the bolt holes 13 of the reference plate 1 can be connected with a tapered screw. The remaining threaded holes 72 can be allowed to have a certain deviation, as long as the tapered screw can be screwed into the bolt holes 13 of the reference plate 1. After the two sides of the reference plates 1 are fixed, it can be measured and calculated whether the center distance of the bolt holes 13 on both sides meets the required size of the drawing. If it meets the technical requirements, it is qualified, and then the vertical ruler on the reference plate 1 is used as a reference to measure each mating surface 71.

[0085] 5. After all the damaged threaded holes 72 are repaired, the above-mentioned detection device is used to detect the dimensional tolerance and form and position tolerance of each surface that cooperates with the bending roller cylinder 7 to confirm the damage amount of each matching surface 71. During the detection, all matching surfaces 71 are based on the center distance of the threaded hole 72 and the plane where the threaded hole 72 is located. The form and position tolerance of each side, upper and lower stopper, and bottom surface are detected. The dimensional tolerance is detected with a caliper and an inner diameter micrometer to determine the specific damage morphology and damage amount of each surface.

[0086] Sixth, the fatigue layer of each mating surface 71 is cleaned by boring and milling machine, and the local deeper area is processed by clamp repair. After surface color flaw detection, it is checked to be defect-free.

[0087] 7. Reproduction treatment: For each mating surface 71, a welding material with a material similar to the base material is used for manual surfacing welding, and the above-mentioned detection device is used to detect the matching, and the cladding amount of each different mating surface 71 is determined, and the thickness of the bottom layer is determined. For each mating surface 71, the fatigue layer can be cleaned by bench grinding or on-site machine tool processing. Then, for each mating surface 71, a welding material with a material similar to the base material is used for manual surfacing welding, and the above-mentioned detection device is used to detect the matching and control the thickness of the bottom layer. The laser cladding process is used to reserve a 1-1.5mm surface functional layer to restore it to the size requirements of the subsequent mechanical processing. The chemical composition percentage content of the laser cladding functional layer is: Co: 49.1%, Cr: 35.1%, Ni: 6.7%, W: 4.6%, Fe: 3.2%, Mo0.6%, Mn0.2%, Ti: 0.15%, V: 0.1%, Cu: 0.1%.

[0088] Eighth, all the mating surfaces 71 are restored by boring and milling machine, and during the machining, the bolt hole 13 on the reference plate 1 is used as the center and the reference surface is aligned.

[0089] Ninth, all the mating surfaces 71 are rechecked for dimensional tolerance and geometric tolerance based on the design size and reference surface of the center distance of the bolt holes 13 on both sides, using the above-mentioned detection device in conjunction with a micrometer and a caliper.

[0090] During repair, first fix the reference plate 1 on the mating surface 71 of the bending roller cylinder 7, then install the Y-axis scale 2, the X-axis scale 3 and the Z-axis scale 4. Since the X-axis scale 3 can slide along the first Y-axis scale 21 and the second Y-axis scale 22, the Z-axis scale 4 is set on the X-axis scale 3 and can slide along the X-axis scale 3. The Z-axis scale 4 can slide along the Z axis, so that the Z-axis scale 4 can move in three dimensions, and scales are set on the scales to facilitate the measurement of the damage amount of the inner surface of the bending roller cylinder 7 and the threaded hole 72, thereby providing a basis for repair.

[0091] Optionally, the wire sleeve 8 is a stainless steel wire sleeve; the outer wall of the stainless steel wire sleeve is also provided with a non-threaded portion 83, and the axial length of the non-threaded portion 83 is equal to three to five times the pitch width of the threaded portion 82. After the outer end of the threaded hole 72 of the mating surface 71 is opened with a 60° groove, the groove depth can be consistent with the length of the non-threaded portion 83 of the stainless steel wire sleeve, and then the prefabricated stainless steel wire sleeve is installed, and the above-mentioned detection device is used for detection to determine that the installed threaded hole 72 is within a controllable range. The outer end face of the non-threaded portion 83 of the stainless steel wire sleeve can be flush with the mating surface 71 of the frame arch body, and the groove joint can be selected from high-grade stainless steel welding materials for welding treatment, so that the combination strength of the wire sleeve 8 and the mating surface 71 body is higher, which can meet the impact of large loads.

[0092] In this example, the structural diagram of the bending roller cylinder 7 is as follows: Figure 6 and Figure 7 As shown, the threaded hole 72a and the threaded hole 72b of the mating surface 71 of the bending roller cylinder 7 are the references, and their positions determine the assembly position of the bending roller cylinder 7. The threaded hole 72 has been damaged, so the so-called reference has changed, and the laser tracking measuring instrument cannot be used for detection. The laser tracking measuring instrument can only detect the relative opening sizes of the detection surfaces 73a, 73b, 73c, and 73d, while the side surfaces 74a, 74b, and top surface 75 cannot be detected and can only be detected using the above-mentioned detection device.

[0093] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0094] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0095] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0096] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0097] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0098] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for detecting and repairing the mating surface of a bending roll cylinder of a plate and strip rolling mill, characterized in that: The following steps are involved: First, disassemble the bending roll cylinder, clean the mating surface area of ​​the bending roll cylinder to be repaired and the damaged threaded holes, detect and confirm the damage and number of the threaded holes, remove the broken bolts from the threaded holes, and remove the sludge impurities on the surface to be processed; Second, select one of the matching surfaces and non-matching surfaces of the bending roller cylinder in turn, and use a laser tracking measuring instrument to detect the center line, symmetry, verticality and window size of the matching surface and the non-matching surface. Select the non-repaired matching surface as the reference surface, and use an outside micrometer to check and verify. Calculate the actual wear of each matching surface based on the measurement data of the laser tracking measuring instrument and the manual measurement data; 3. Prefabricate the thread sleeve, wherein the inner wall of the thread sleeve is provided with an internal thread, and the outer wall of the thread sleeve is provided with an external thread; 4. Threaded hole repair: a. Select the threaded holes on the mating surface of the bending roller cylinder, use the detection device to detect the center distance of the threaded holes, and draw out the center line of each threaded hole, and disassemble the above detection device; the above detection device includes a reference plate, a Y-axis ruler, an X-axis ruler and a Z-axis ruler; The reference plate includes a first reference plate and a second reference plate, the first reference plate and the second reference plate are arranged parallel to each other, and the first reference plate and the second reference plate are used to be fixed on the matching surface; The Y-axis scale comprises a first Y-axis scale and a second Y-axis scale, wherein the first Y-axis scale is fixed on the first reference plate and is parallel to the first reference plate, and the second Y-axis scale is fixed on the second reference plate and is parallel to the second reference plate; One end of the X-axis scale is connected to the first Y-axis scale, and the other end of the X-axis scale is connected to the second Y-axis scale. The X-axis scale can slide along the first Y-axis scale and the second Y-axis scale, and can be fixed on the first Y-axis scale and the second Y-axis scale; The Z-axis ruler is arranged on the X-axis ruler and can slide along the X-axis ruler, and at the same time, the Z-axis ruler can slide along the Z-axis; b. According to the center line of each threaded hole, drill and tap the damaged threaded holes on all assembly surfaces according to the depth of the threaded holes and the standard size of the external threads of the prefabricated thread sleeves; c. Install the prefabricated thread sleeve, use the above detection device to detect the center distance of the threaded hole again, and disassemble the above detection device; 5. After all the damaged threaded holes are repaired, the above-mentioned detection device is used to detect the dimensional tolerance and form and position tolerance of each surface that matches the bending roller cylinder to confirm the damage amount of each matching surface; Sixth, the fatigue layer of each mating surface is cleaned by boring and milling machine, and the deeper area is processed by clamp repair; 7. Reproduction treatment: Use welding materials with similar materials to the base material to manually build up the base surface of each mating surface, use the above-mentioned detection device to detect the matching, determine the cladding amount of each different mating surface, and determine the thickness of the bottom layer; 8. All the mating surfaces are restored by boring and milling machines, and the bolt holes on the reference plate are used as the center and the reference surface for alignment during processing; 9. All mating surfaces are based on the design dimensions of the center distance of the bolt holes on both sides and the reference surface. The above-mentioned detection device is used in conjunction with a micrometer and caliper to re-check the dimensional tolerance and form and position tolerance of all mating surfaces.

2. The method for detecting and repairing the mating surface of the bending cylinder of a plate and strip rolling mill according to claim 1, characterized in that: The wire sleeve is a stainless steel wire sleeve; a non-threaded portion is also arranged on the outer wall of the stainless steel wire sleeve, and the axial length of the non-threaded portion is equal to three to five times the pitch width of the external threaded portion.

3. The method for detecting and repairing the mating surface of the bending cylinder of a plate and strip rolling mill according to claim 1, characterized in that: It also includes a fixing piece, which is arranged on the reference plate and fixes the reference plate on the matching surface.

4. The method for detecting and repairing the mating surface of the bending cylinder of a plate and strip rolling mill according to claim 3, characterized in that: Bolt holes are arranged on the reference plate; the fixing piece is a tapered screw rod, which passes through the bolt holes to fix the reference plate on the matching surface.

5. The method for detecting and repairing the mating surface of the bending cylinder of a plate and strip rolling mill according to claim 4, characterized in that: The bolt hole is consistent in size with the threaded hole set on the matching surface, and the bolt hole is Y-shaped, the lower part of the bolt hole is a straight hole, and the upper part of the bolt hole is a tapered hole, and the depth of the tapered hole is equal to half the depth of the straight hole.

6. The method for detecting and repairing the mating surface of the bending cylinder of a plate and strip rolling mill according to claim 5, characterized in that: The lower part of the tapered screw is provided with threads, the middle part is provided with a tapered protrusion, the tapered protrusion corresponds to the tapered hole, and the top part is a hexagonal head rotating part.

7. The method for detecting and repairing the mating surface of the bending cylinder of a plate and strip rolling mill according to claim 1, characterized in that: A gasket is arranged between the reference plate and the matching surface.

8. The method for detecting and repairing the mating surface of the bending cylinder of a plate and strip rolling mill according to claim 1, characterized in that: The X-axis scale is fixed on the first Y-axis scale and the second Y-axis scale through a top screw.

9. The method for detecting and repairing the mating surface of the bending cylinder of a plate and strip rolling mill according to claim 1, characterized in that: The first Y-axis scale is fixed to the first reference plate through positioning pins, and the second Y-axis scale is fixed to the second reference plate through positioning pins.

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