A repair device and method for a bolt hole on a side surface of a gateway guide groove

Abstract

The application discloses a repair device and method for bolt holes on the side of a gateway guide groove, wherein the repair device comprises a first supporting bottom plate, a second supporting bottom plate, a supporting connecting rod, a drilling and tapping assembly and a driving assembly; the first supporting bottom plate is arranged to abut against one side of the gateway guide groove; the second supporting bottom plate is arranged opposite to the first supporting bottom plate and abuts against the other side of the gateway guide groove; a Y-direction level is arranged on the second supporting bottom plate; the supporting connecting rod connects the first supporting bottom plate and the second supporting bottom plate and is arranged to be adjustable in length; an X-direction level and a center hole drawing needle are arranged on the supporting connecting rod; the drilling and tapping assembly is slidingly arranged on the supporting connecting rod; and the driving assembly is connected with the drilling and tapping assembly and drives the drilling and tapping assembly to slide along the supporting connecting rod. The bolt hole position is accurate after being repaired by the repair device, the safety risk and labor intensity are reduced, and the operation efficiency is improved.

Description

[0001] The application is a divisional application of the patent application entitled "Pavilion Guide Concave Side Bolt Hole Repairing Device and Repairing Method", the original application date is April 1, 2022, and the application number is 202210349078.9. TECHNICAL FIELD

[0002] The application relates to the field of pavilion guide concave repairing, in particular to a pavilion guide concave side bolt hole repairing device and repairing method. BACKGROUND

[0003] The rolling mill pavilion is an important equipment in the hot rolling plate and strip rolling process. The plate shape control that has the greatest influence on the plate and strip yield depends on the precision of the rolling mill pavilion. The main function of the pavilion entrance guide is to remove phosphorus and guide the steel plate during the steel plate rolling process, so as to ensure the quality of the steel plate and reduce the impact on the roller. At the same time, it supports the roller and the roller cooling.

[0004] The guide is installed between the driving side pavilion and the operating side pavilion of the rolling mill. The guide key is installed on the two pavilions. The guide is composed of a sliding groove that slides up and down through a sliding block, a lining plate and connecting bolts. The guide is matched with the guide key to complete the lifting and lowering of the guide. The lifting and lowering of each guide is realized by two hydraulic cylinders. The rolling mill pavilion is generally made of ordinary carbon steel. During the plate rolling production process, it is corroded by high-temperature cooling water, which gradually causes a gap between the concave groove and the lining plate, and the fastening bolts lose their fastening effect. When the lining plate is impacted, the bolts produce axial micro-movement, increasing the contact area of the concave bolt hole thread, and aggravating the wear of the bolt and the bolt hole, which is prone to cause the bolt to slip and break, further increasing the gap between the lining plate and the pavilion. It has an impact on the safety of production and product quality.

[0005] After the guide concave groove is corroded and worn, the existing technology uses a lining plate compensation method for recovery, which cannot ensure the parallelism and perpendicularity of the guide concave groove, and the effect is not good. After the bolt hole of the lining plate fastened to the side surface of the guide concave groove slips and is damaged, due to the limited width of the guide concave groove, a hand drill or a magnetic drill cannot be put in for operation, and repair cannot be achieved. Only drilling can be performed from the outside of the guide concave groove, through the process hole and across the gap area of the guide concave groove. The bolt hole is generally smaller than M20, and only a magnetic drill and an extended drill can be used for drilling on site, which is prone to cause deviation of the bolt hole, so that only a small part of the bolt can be installed, and the expected effect cannot be achieved. At the same time, the use of a magnetic drill increases the safety risk and labor intensity, and prolongs the operation time. SUMMARY

[0006] The present application aims to solve at least one of the above technical problems in the art. To this end, one object of the present application is to provide a device for repairing bolt holes on the side of a guide groove of a pailou guide, which has the advantages of light weight and simple structure, accurate position of the bolt holes repaired by the device, simple and controllable operation, reduced safety risk and labor intensity, and improved work efficiency.

[0007] A second object of the present application is to provide a method for repairing bolt holes on the side of a guide groove of a pailou guide, which has the advantages of accurate position of the bolt holes repaired by the method, reduced safety risk and labor intensity, and improved work efficiency.

[0008] To achieve the above objects, the first aspect of the present application provides a device for repairing bolt holes on the side of a guide groove of a pailou guide, comprising:

[0009] A first support bottom plate is arranged to abut against one side of the guide groove of the pailou guide;

[0010] A second support bottom plate is arranged opposite to the first support bottom plate and arranged to abut against the other side of the guide groove of the pailou guide, and a Y-direction level is arranged on the second support bottom plate;

[0011] A support link is connected between the first support bottom plate and the second support bottom plate, and the support link is arranged to be adjustable in length, and an X-direction level and a center hole position marking needle are arranged on the support link;

[0012] A drilling and tapping assembly is arranged to slide on the support link;

[0013] A driving assembly is connected to the drilling and tapping assembly and drives the drilling and tapping assembly to slide along the support link;

[0014] The driving assembly comprises a fixed sleeve, a moving rod, a gear, and a rotating member; the fixed sleeve is fixedly arranged; the moving rod is arranged to slide in the fixed sleeve, and a straight toothed rack is arranged on the moving rod, and the moving rod is connected to the drilling and tapping assembly; the gear is rotatably arranged on the fixed sleeve and engaged with the straight toothed rack of the moving rod; the rotating member is connected to the gear, and rotating the rotating member drives the gear to rotate, and the rotation of the gear drives the moving rod to move horizontally.

[0015] Optionally, the support link is arranged in two parallel rods, and each of the support links is arranged to be adjustable in length.

[0016] Optionally, the X-direction level is arranged on one of the support links, and the center hole position marking needle is arranged on the other support link.

[0017] Optionally, each of the support connecting rods is composed of a main support connecting rod and a secondary support connecting rod, and the main support connecting rod and the secondary support connecting rod are connected through a telescopic bolt sleeve.

[0018] Optionally, the telescopic bolt sleeve comprises a nut sleeve and a locking nut, one end of the nut sleeve is connected with the main support connecting rod and is fixed through the locking nut, and the other end of the nut sleeve is connected with the secondary support connecting rod and is fixed through the locking nut.

[0019] Optionally, the drilling and tapping assembly comprises an angle grinder and a chuck, the angle grinder is slidingly arranged on the support connecting rod and is connected with the driving assembly, the chuck is connected with the angle grinder, and a drill bit or a tap is mounted on the chuck.

[0020] Optionally, one end of the fixing sleeve is fixedly connected with the first support bottom plate, and the other end of the fixing sleeve is fixed on the support connecting rod through a second support connecting seat.

[0021] To achieve the above-mentioned purpose, the second aspect of the present application provides a repair method for bolt holes on the side surface of a guide groove of a pailou, comprising the following steps:

[0022] First, the bolt holes are subjected to hole expansion treatment;

[0023] Second, the expanded bolt holes are subjected to sealing welding treatment and polishing treatment;

[0024] Third, the two side surfaces of the groove are subjected to copying treatment and forming treatment, and after the forming treatment, the original size and form tolerance requirements of the two side surfaces of the groove are restored;

[0025] Fourth, the bolt hole positions on the two side surfaces of the groove are marked, and the center points of the bolt holes are positioned;

[0026] Fifth, the first support bottom plate is abutted on one of the side surfaces of the guide groove of the pailou, the second support bottom plate is abutted on the other side surface of the guide groove of the pailou, i.e. the side surface on which the tapping and drilling are required, the length of the support connecting rod is adjusted by rotating the nut sleeve between the main support connecting rod and the secondary support connecting rod, so that the first support bottom plate is in a Y-direction horizontal state, and at the same time, the support connecting rod is in an X-direction horizontal state; the center of the laser cladding treatment bolt hole is found by using the center hole marking needle; the rotating member in the driving assembly is rotated to drive the gear to rotate, the gear rotation drives the moving rod to move horizontally, the moving rod drives the angle grinder and the drill bit or tap in the hole tapping assembly to move along the support connecting rod, and the center position of the laser cladding treatment bolt hole is drilled and tapped to repair and form a new bolt hole.

[0027] Optionally, the two sides of the groove are reshaped using a laser cladding method. The composition and weight percentage of the cladding powder are as follows: C 0.05%, Si 0.58%, Cr 16%, Mn 0.15%, P 0.01%, S 0.003%, B 1.1%, and Fe balance.

[0028] According to an embodiment of the present invention, a method for repairing bolt holes on the side of a guide groove in an archway is provided. After the bolt holes on the side of the guide groove are damaged, the damaged bolt holes are enlarged, sealed, and laser-clad. Then, a repair device is used for tapping and drilling. When tapping and drilling the side of the guide groove, a first support base plate abuts against one side of the guide groove, and a second support base plate abuts against the other side of the guide groove, i.e., the side requiring tapping and drilling. The length of the support connecting rod is adjusted so that the first support base plate is horizontal in the Y direction, and the support connecting rod is horizontal in the X direction. A center hole marker is used to locate the center of the laser-clad bolt hole. A drive assembly drives the drilling and tapping assembly to slide along the support connecting rod and drills and taps the center position of the laser-clad bolt hole, repairing and forming a new bolt hole. Therefore, the bolt hole repaired by this method is accurately positioned, simple to operate, and highly controllable, while reducing safety risks and labor intensity, and improving work efficiency. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the repair device according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 A sectional view along the AA direction;

[0032] Figure 3 for Figure 1 Cross-sectional view along the BB direction;

[0033] Figure 4 for Figure 1 Sectional view in the CC direction;

[0034] Figure 5 for Figure 1 Cross-sectional view along the DD direction;

[0035] Figure 6 for Figure 1 Cross-sectional view in the EE direction;

[0036] Figure 7 Structure diagram of the moving rod according to the embodiment of the present application.

[0037] Label explanation

[0038] The first support base plate 1, the second support base plate 2, the Y direction level 21, the support connecting rod 3, the X direction level 31, the center hole position drawing needle 32, the main support connecting rod 33, the auxiliary support connecting rod 34, the drilling and tapping assembly 4, the angle grinder 41, the clamping head 42, the drill bit or tap 43, the first support connecting seat 44, the driving assembly 5, the fixed sleeve 51, the moving rod 52, the straight rack 521, the gear 53, the rotating part 54, the second support connecting seat 55, the support bearing 56, the rotating shaft 57, the telescopic bolt sleeve 6, the nut sleeve 61, and the locking nut 62. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0040] When the bolt hole on the side surface of the guide groove of the arch is tapped and drilled, the first support base plate abuts against one side surface of the guide groove of the arch, the second support base plate abuts against the other side surface of the guide groove of the arch, i.e. the side surface on which the bolt hole needs to be tapped and drilled, the length of the support connecting rod is adjusted, the first support base plate is in the Y direction horizontal state, and the support connecting rod is in the X direction horizontal state at the same time; the center hole position drawing needle is used to find the center of the laser cladding treatment bolt hole; the driving assembly drives the drilling and tapping assembly to slide along the support connecting rod, and the center position of the laser cladding treatment bolt hole is tapped and drilled to form a new bolt hole. Therefore, the bolt hole position repaired by the repairing device is accurate, the operation is simple, the controllability is good, the safety risk and the labor intensity are reduced, and the work efficiency is improved.

[0041] As shown in Figures 1 to 7 The bolt hole repairing device for the side surface of the guide groove of the arch according to the embodiment of the present application includes the first support base plate 1, the second support base plate 2, the support connecting rod 3, the drilling and tapping assembly 4, and the driving assembly 5.

[0042] The first support base plate 1 is arranged to abut against one side surface of the guide groove of the arch.

[0043] The second support base plate 2 is arranged opposite to the first support base plate 1, and the second support base plate 2 is arranged to abut against the other side surface of the guide groove of the arch. The second support base plate 2 is provided with the Y direction level 21, and the Y direction level 21 can be a horizontal bubble.

[0044] The support connecting rod 3 connects the first support base plate 1 and the second support base plate 2, and is arranged to be adjustable in length. The support connecting rod 3 is provided with an X-direction level 31 and a center hole position marking needle 32. The X-direction level 31 can be a horizontal bubble. The support connecting rod 3 can be a round rod.

[0045] Optionally, the support connecting rod 3 is arranged in two parallel rods, and each of the support connecting rods 3 is arranged to be adjustable in length. Specifically, the X-direction level 31 is arranged on one of the support connecting rods 3, and the center hole position marking needle 32 is arranged on the other support connecting rod 3, as shown in Figure 1 The X-direction level 31 is arranged on the upper support connecting rod 3, and the center hole position marking needle 32 is arranged on the lower support connecting rod 3. Each of the support connecting rods 3 is composed of a main support connecting rod 33 and a secondary support connecting rod 34, and the main support connecting rod 33 and the secondary support connecting rod 34 are connected through a telescopic bolt sleeve 6. The telescopic bolt sleeve 6 can adjust the overall length of the support connecting rod 3. The telescopic bolt sleeve 6 includes a nut sleeve 61 and a locking nut 62. One end of the nut sleeve 61 is connected with the main support connecting rod 33 and is fixed through the locking nut 62, and the other end of the nut sleeve 61 is connected with the secondary support connecting rod 34 and is fixed through the locking nut 62.

[0046] The drilling and tapping assembly 4 is slidingly arranged on the support connecting rod 3. Optionally, the drilling and tapping assembly 4 includes an angle grinder 41 and a chuck head 42. The angle grinder 41 is slidingly arranged on the support connecting rod 3 and is connected with the driving assembly 5. The chuck head 42 is connected with the angle grinder 41, and a drill bit or a tap 43 is installed on the chuck head 42. Specifically, the angle grinder 41 is slidingly arranged on the support connecting rod 3 through a first support connecting seat 44. The angle grinder 41 can be a variable speed angle grinder.

[0047] The driving assembly 5 is connected with the drilling and tapping assembly 4 and drives the drilling and tapping assembly 4 to slide along the support connecting rod 3. Optionally, the driving assembly 5 includes a fixed sleeve 51, a moving rod 52, a gear 53, and a rotating member 54. The fixed sleeve 51 is fixedly arranged. Specifically, one end of the fixed sleeve 51 is fixedly connected with the first support base plate 1, and the other end of the fixed sleeve 51 is fixed on the support connecting rod 3 through a second support connecting seat 55. The moving rod 52 is slidingly arranged in the fixed sleeve 51, and the moving rod 52 is provided with a straight rack 521. The moving rod 52 is connected with the angle grinder 41 of the drilling and tapping assembly 4. The gear 53 is rotatably arranged on the fixed sleeve 51 and is engaged with the straight rack 521 of the moving rod 52. The rotating member 54 is connected with the gear 53. Rotating the rotating member 54 drives the gear 53 to rotate. The rotation of the gear 53 drives the moving rod 52 to move horizontally. The moving rod 52 drives the angle grinder 41 and the drill bit or tap 43 to move, thereby realizing drilling and tapping.

[0048] The fixed sleeve 51 is provided with a support bearing 56, the gear 53 is installed on a rotating shaft 57, the rotating shaft 57 is arranged in the support bearing 56, and the rotating shaft 57 is provided with a hexagonal head at both ends to connect a ratchet wrench, and the ratchet wrench is used as the rotating part 54.

[0049] When the groove side of the portal guide is drilled and tapped, the first support base plate 1 is abutted on one side of the groove of the portal guide, the second support base plate 2 is abutted on the other side of the groove of the portal guide, i.e. the side to be drilled and tapped, the length of the support connecting rod 3 is adjusted, so that the first support base plate 1 is in a Y-direction horizontal state, and the support connecting rod 3 is in an X-direction horizontal state; the center of the laser cladding processing bolt hole is found by using the center hole drawing needle 32; the drilling and tapping assembly 4 is driven by the driving assembly 5 to slide along the support connecting rod 3, and the center position of the laser cladding processing bolt hole is drilled and tapped to form a new bolt hole.

[0050] As shown in Figures 1 to 7 The portal guide groove side bolt hole repair method of the embodiment of the application comprises the following steps:

[0051] The two side surfaces of the portal guide groove are subjected to rough machining treatment to remove the corrosion surface of the surfaces.

[0052] The broken bolts in the bolt holes of the two side surfaces of the groove are taken out, and each bolt hole is inspected to identify each damaged bolt hole to be repaired.

[0053] The damaged bolt hole is subjected to hole expansion treatment by using an electric grinder.

[0054] The hole expanded bolt hole is subjected to sealing welding treatment; the sealing welding treatment adopts electric welding or gas shielded welding mode, the surfacing material is low alloy steel welding material, the bolt hole is filled and welded, and is ground flush with the plane.

[0055] The two sides of the groove undergo replication and shaping processes. Replication is performed to meet the dimensional requirements of the groove opening. This replication process uses laser cladding, employing a fiber laser in conjunction with a robot. The laser cladding parameters are: laser power 2800-3800W, scanning speed 800-2400mm / min, spot diameter 3-4mm, synchronous lateral powder feeding, and high-purity argon protection. The composition and weight percentage of the cladding powder are: C 0.05%, Si 0.58%, Cr 16%, Mn 0.15%, P 0.01%, S 0.003%, B 1.1%, Fe balance. Shaping restores the original dimensions and geometric tolerances of the two sides of the groove. Shaping can be performed using machine tools or clamp repair to restore the original dimensions and geometric tolerances. Machine tool processing is preferred, with clamp repair used in some areas.

[0056] The first support base plate 1 is placed against one side of the archway guide groove, and the second support base plate 2 is placed against the other side of the archway guide groove, i.e., the side that needs to be tapped and drilled. The length of the support link 3 is adjusted by rotating the nut sleeve 61 between the main support link 33 and the auxiliary support link 34, so that the first support base plate 1 is in a horizontal state in the Y direction, and the support link 3 is in a horizontal state in the X direction. The center hole marker 32 is used to find the center of the laser cladding bolt hole. The rotating part 54 is rotated to drive the gear 53 to rotate. The rotation of the gear 53 drives the moving rod 52 to move horizontally. The moving rod 52 drives the angle grinder 41 and the drill bit or tap 43 to move along the support link 3, and drills and taps the center position of the laser cladding bolt hole to repair and form a new bolt hole.

[0057] According to an embodiment of the present invention, a method for repairing bolt holes on the side of a guide groove of an archway is provided. After the bolt holes on the side of the guide groove are damaged, the damaged bolt holes are enlarged, sealed, and laser-clad. Then, a repair device is used for tapping and drilling. When tapping and drilling the side of the guide groove, a first support base plate 1 abuts against one side of the guide groove, and a second support base plate 2 abuts against the other side of the guide groove, i.e., the side requiring tapping and drilling. The length of the support connecting rod 3 is adjusted so that the first support base plate 1 is horizontal in the Y direction, and the support connecting rod 3 is horizontal in the X direction. A center hole marker 32 is used to locate the center of the laser-clad bolt hole. The driving component 5 drives the drilling and tapping component 4 to slide along the support connecting rod 3 and drills and taps the center position of the laser-clad bolt hole, repairing and forming a new bolt hole. Therefore, the bolt hole repaired by this method is accurately positioned, simple to operate, and highly controllable, while reducing safety risks and labor intensity, and improving work efficiency.

[0058] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does 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 therefore cannot be understood as a limitation of the present application.

[0059] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0060] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] In the present application, unless otherwise explicitly specified and limited, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0062] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the specification.

[0063] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and should not be construed as limiting the present application, and those ordinarily skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A portal guide groove side bolt hole repairing device, characterized in that, The utility model relates to a kind of drilling and tapping assembly and drilling and tapping device, including: First support base plate, the first support base plate is set to abut with one side of pahong guide groove; Second support base plate, the second support base plate is oppositely set with the first support base plate, the second support base plate is set to abut with the other side of pahong guide groove, Y direction level is equipped on the second support base plate; Support connecting rod, the support connecting rod connects the first support base plate with the second support base plate, the support connecting rod is set to length adjustable, X direction level and center hole position drawing needle are equipped on the support connecting rod; Drilling and tapping assembly, the drilling and tapping assembly is slidably arranged on the support connecting rod; Driving assembly, the driving assembly is connected with the drilling and tapping assembly, and drives the drilling and tapping assembly to slide along the support connecting rod; The driving assembly includes fixed sleeve, moving rod, gear and rotating part; The fixed sleeve is fixedly arranged;One end of the fixed sleeve is fixedly connected with the first support base plate, and the other end of the fixed sleeve is fixed on the support connecting rod through the second support connecting seat;The moving rod is slidably arranged in the fixed sleeve, and a straight rack is provided on the moving rod;The moving rod is connected with the drilling and tapping assembly;The gear is rotatably arranged on the fixed sleeve and is engaged with the straight rack of the moving rod;The rotating part is connected with the gear, and rotating the rotating part drives the gear to rotate, and the gear rotation drives the moving rod to move horizontally.

2. A repair device for a portal guide groove side bolt hole according to claim 1, characterized in that, The support connecting rod is arranged in parallel, and each support connecting rod is arranged to be length adjustable.

3. A portal guide groove side bolt hole repairing device according to claim 2, characterized in that, The X direction level is arranged on one of the support connecting rods, and the center hole position drawing needle is arranged on the other support connecting rod.

4. A portal guide groove side bolt hole repairing device according to claim 2, characterized in that, Each support connecting rod is composed of a main support connecting rod and a secondary support connecting rod, and the main support connecting rod and the secondary support connecting rod are connected by a telescopic bolt sleeve.

5. A portal guide groove side bolt hole repair device according to claim 4, characterized in that, The telescopic bolt sleeve includes a nut sleeve and a locking nut, one end of the nut sleeve is connected with the main support connecting rod and fixed by the locking nut, and the other end of the nut sleeve is connected with the secondary support connecting rod and fixed by the locking nut.

6. A portal guide groove side bolt hole repair device as described in claim 1, wherein, The drilling and tapping assembly includes an angle grinder and a chuck, the angle grinder is slidably arranged on the support connecting rod and connected with the driving assembly, the chuck is connected with the angle grinder, and a drill bit or a tap is installed on the chuck.

7. The method for repairing the bolt hole of the side of the guide groove of the portal guide according to claim 4 or 5, characterized in that, The utility model includes the following steps: First, the bolt hole is expanded; Second, the expanded bolt hole is sealed and polished; Third, the two sides of the groove are replicated and processed, and the original size and tolerance requirements of the two sides of the groove are restored after processing; Fourth, the bolt hole of the two sides of the groove is marked, and the center point of the bolt hole is positioned. Five, the first support plate against the side of the guide groove of the memorial arch, the second support plate against the other side of the guide groove of the memorial arch, that is, the side of the hole to be tapped, adjust the length of the support connecting rod by rotating the nut sleeve between the main support connecting rod and the auxiliary support connecting rod, so that the first support plate is in a Y-direction horizontal state, and the support connecting rod is in an X-direction horizontal state; use the center hole to draw a needle to find the center of the laser cladding processing bolt hole; rotate the rotating member in the driving assembly to drive the gear to rotate, the gear rotates to drive the moving rod to move horizontally, the moving rod drives the angle grinder and the drill or the tap in the drilling and tapping assembly to move along the support connecting rod, and drills and taps the center position of the laser cladding processing bolt hole to repair and form a new bolt hole; The components and weight percentage contents of the laser cladding powder for the profiling treatment of the two side surfaces of the groove are: C 0.05%, Si 0.58%, Cr 16%, Mn 0.15%, P 0.01%, S 0.003%, B 1.1%, and Fe balance.

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