阅读说明：本技术 一种螺栓孔修复再造装置及方法 (Bolt hole repairing and reconstructing device and method ) 是由 周武军 李猛 何勋 曹跃朋 熊雄 邹新长 徐志伟 杨拥军 周欲龙 朱红梅 陈勇 于 2021-08-09 设计创作，主要内容包括：本发明公开一种板带轧机牌坊大型螺栓孔的修复再造装置及方法,其中修复再造装置包括底座机构、加工机构、内孔堆焊机构,底座机构包括底板、移动设置于底板上的X轴平台、移动设置于X轴平台上的Y轴平台以及固定于Y轴平台上的可调支撑平台；加工机构可安装于可调支撑平台上,包括可安装于可调支撑平台上的安装侧板、设置于安装侧板一侧的驱动器、设置于安装侧板另一侧与驱动器连接的连接座以及与连接座连接的刀具；内孔堆焊机构可安装于可调支撑平台上,包括可安装于可调支撑平台上的支撑板、安装于支撑板上的旋转部件以及安装于旋转部件上的焊枪；旋转部件由C轴驱动器驱使转动。本发明实现现场快速修复,提高修复效率,提升螺栓孔的使用寿命。(The invention discloses a repairing and reproducing device and a repairing and reproducing method for a large bolt hole of a housing of a plate and strip mill, wherein the repairing and reproducing device comprises a base mechanism, a machining mechanism and an inner hole surfacing mechanism, wherein the base mechanism comprises a bottom plate, an X-axis platform movably arranged on the bottom plate, a Y-axis platform movably arranged on the X-axis platform and an adjustable supporting platform fixed on the Y-axis platform; the processing mechanism can be arranged on the adjustable supporting platform and comprises an installation side plate which can be arranged on the adjustable supporting platform, a driver arranged on one side of the installation side plate, a connecting seat arranged on the other side of the installation side plate and connected with the driver, and a cutter connected with the connecting seat; the inner hole surfacing mechanism can be arranged on the adjustable supporting platform and comprises a supporting plate which can be arranged on the adjustable supporting platform, a rotating part which is arranged on the supporting plate and a welding gun which is arranged on the rotating part; the rotating part is driven to rotate by a C-axis driver. The invention realizes the on-site quick repair, improves the repair efficiency and prolongs the service life of the bolt hole.)

1. A bolt hole repairing and reproducing device is characterized by comprising:

the base mechanism comprises a bottom plate, an X-axis platform movably arranged on the bottom plate, a Y-axis platform movably arranged on the X-axis platform and an adjustable supporting platform fixed on the Y-axis platform; the X-axis platform is driven to move by an X-axis driver, and the Y-axis platform is driven to move by a Y-axis driver;

the machining mechanism can be arranged on the adjustable supporting platform and comprises an installation side plate, a driver, a connecting seat and a cutter, wherein the installation side plate can be arranged on the adjustable supporting platform, the driver is arranged on one side of the installation side plate, the connecting seat is arranged on the other side of the installation side plate and is connected with the driver, the cutter is connected with the connecting seat, and the cutter is a drill bit, a boring cutter or a screw tap;

the inner hole surfacing mechanism can be arranged on the adjustable supporting platform and comprises a supporting plate which can be arranged on the adjustable supporting platform, a rotating part arranged on the supporting plate and a welding gun arranged on the rotating part; the rotating component is driven to rotate by a C-axis driver.

2. The apparatus according to claim 1, further comprising a motion controller connected to and controlling the X-axis driver, the Y-axis driver, and the C-axis driver, respectively.

3. The bolt hole repairing and reconstructing device of claim 1, wherein a T-shaped groove is formed in the Y-axis platform, a screw rod is arranged in the T-shaped groove, a threaded portion of the screw rod is connected with the adjustable supporting platform, a locking nut and an adjusting nut are respectively connected to the threaded portion of the screw rod, the locking nut is located above the adjustable supporting platform, and the adjusting nut is located below the adjustable supporting platform so as to adjust the height and the flatness of the adjustable supporting platform.

4. The device for repairing and reconstructing a bolt hole according to claim 3, wherein said adjustable support platform is provided with mounting holes with different diameters and different positions.

5. The apparatus according to claim 1, wherein the driver of the processing mechanism is a hydraulic motor, and the hydraulic motor is connected to the hydraulic station through a hydraulic pipe and a return pipe.

6. The bolt hole repairing and rebuilding device of claim 1, wherein said welding gun is connected with wire feeder and gas shielded welding machine.

7. The bolt hole repairing and reconstructing method is characterized by comprising the following steps of:

firstly, an X-axis platform is movably arranged on a bottom plate, a Y-axis platform is movably arranged on the X-axis platform, an adjustable supporting platform is fixed on the Y-axis platform, an X-axis driver drives the X-axis platform to move, and a Y-axis driver drives the Y-axis platform to move, so that the adjustable supporting platform is located at a position suitable for the machining mechanism and the inner hole surfacing mechanism to act;

the processing mechanism comprises a mounting side plate which can be mounted on the adjustable supporting platform, a driver arranged on one side of the mounting side plate, a connecting seat arranged on the other side of the mounting side plate and connected with the driver, and a cutter connected with the connecting seat; the inner hole surfacing mechanism comprises a supporting plate which can be arranged on the adjustable supporting platform, a rotating part which is arranged on the supporting plate and a welding gun which is arranged on the rotating part;

secondly, mounting the machining mechanism on the adjustable supporting platform, wherein a cutter of the machining mechanism adopts a drill bit to remove original threads and fatigue layers of bolt holes;

thirdly, replacing the inner hole surfacing mechanism to the adjustable supporting platform, driving the rotating part to rotate by the C-axis driver to drive the welding gun to rotate, and surfacing the bolt hole with the original thread and the fatigue layer removed;

and fourthly, replacing the machining mechanism to the adjustable supporting platform, and respectively selecting a boring cutter and a screw tap to bore and tap the bolt hole after surfacing so as to repair and reproduce the bolt hole.

8. The method for repairing and rebuilding bolt holes according to claim 7, wherein before step one, the center line of the bolt hole is drawn, the height of the adjustable support platform and the center position of the bolt hole is measured, and the bottom plate is adjusted and fixed.

9. The method for repairing and rebuilding bolt holes of claim 7, wherein the X-axis driver, the Y-axis driver and the C-axis driver are controlled by a motion controller.

Technical Field

The invention relates to the technical field of bolt hole repairing, in particular to a repairing and reproducing device and method for large bolt holes of a plate and strip mill housing.

Background

The hot-rolled plate and strip rolling mill housing and the bearing seat are important equipment of a production line of a steel enterprise, the position state of the equipment is also an important factor for determining the product quality, and the bearing can move in the running process of the rolling mill housing, so that the stability of steel rolling operation and the product quality are influenced, and the safety production is influenced. In order to prevent the bearing seat from moving, a door locking baffle is arranged on the operation side of the rolling mill and is fastened on the side surface of the housing by using M64 or M72 or even larger bolts. The mill housing is influenced by the material of the mill housing, the base body is generally made of G25 or G35 steel, and the large bolt holes for fastening the door-locking baffle plate are corroded and worn by metal fatigue due to the long-term wet, oxidation and high-temperature environment and the impact of the bearing seat, so that the sliding threads of the bolt holes are failed or the bolts are broken.

In the prior art, bolt holes are repaired by the following method: firstly, tapping the bolt hole, and taking out oxides and impurities on the surface by the method, so that the problem of bolt hole failure cannot be fundamentally solved; secondly, the bolt is welded on the bolt hole by electric welding, the method can only be used for temporarily fastening, and after a short time, the surfacing area still has threads, so that the bolt fails; and thirdly, the bolt holes are filled by electric welding, and then the holes are drilled and tapped, the method generally adopts common carbon steel soft material welding materials which are easy to drill and can be used only in a short period, if high-strength welding materials are adopted, the difficulty of drilling and tapping treatment is greatly increased on site, the repairing operation time is long, multiple operators are required to coordinate the operation, the labor intensity is high, the repairing difficulty is high, and the construction period is long.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. Therefore, the invention aims to provide a bolt hole repairing and reconstructing device, which can realize on-site quick repairing, improve the repairing efficiency and prolong the service life of a bolt hole.

The second purpose of the invention is to provide a bolt hole repairing and reconstructing method.

In order to achieve the above object, a first aspect of the present invention provides a bolt hole repairing and rebuilding device, including:

the base mechanism comprises a bottom plate, an X-axis platform movably arranged on the bottom plate, a Y-axis platform movably arranged on the X-axis platform and an adjustable supporting platform fixed on the Y-axis platform; the X-axis platform is driven to move by an X-axis driver, and the Y-axis platform is driven to move by a Y-axis driver;

the machining mechanism can be arranged on the adjustable supporting platform and comprises an installation side plate, a driver, a connecting seat and a cutter, wherein the installation side plate can be arranged on the adjustable supporting platform, the driver is arranged on one side of the installation side plate, the connecting seat is arranged on the other side of the installation side plate and is connected with the driver, the cutter is connected with the connecting seat, and the cutter is a drill bit, a boring cutter or a screw tap;

the inner hole surfacing mechanism can be arranged on the adjustable supporting platform and comprises a supporting plate which can be arranged on the adjustable supporting platform, a rotating part arranged on the supporting plate and a welding gun arranged on the rotating part; the rotating component is driven to rotate by a C-axis driver.

According to the bolt hole repairing and reconstructing device provided by the embodiment of the invention, when a bolt hole is repaired, the X-axis platform and the Y-axis platform of the base mechanism are moved, the adjustable supporting platform is positioned at a position suitable for the action of the machining mechanism and the inner hole surfacing mechanism, the adjustable supporting platform is adjusted to be vertical to the bolt hole, the original thread and fatigue layer of the bolt hole are removed by a cutter of the machining mechanism, after the original thread and fatigue layer are removed, the inner hole surfacing mechanism is replaced to the adjustable supporting platform, the bolt hole from which the original thread and fatigue layer are removed is subjected to surfacing welding, a surfacing welding material can be selected to be a material which has certain strength and corrosion resistance and is higher than a body, then the machining mechanism is replaced to the adjustable supporting platform, a boring cutter and a screw tap are respectively used for carrying out boring and tapping treatment on the bolt hole after surfacing welding, the repairing and reconstructing of the bolt hole are completed, the quick in-site repairing is realized, and the repairing efficiency is improved, the service life of the bolt hole is prolonged.

In addition, the bolt hole repairing and reconstructing device provided by the above embodiment of the invention may further have the following additional technical features:

optionally, the device further comprises a movement controller, and the movement controller is respectively connected with the X-axis driver, the Y-axis driver and the C-axis driver and controls the actions of the X-axis driver, the Y-axis driver and the C-axis driver.

Optionally, a T-shaped groove is formed in the Y-axis platform, a screw rod is arranged in the T-shaped groove, the thread portion of the screw rod is connected with the adjustable supporting platform, a locking nut and an adjusting nut are respectively connected to the thread portion of the screw rod, the locking nut is located above the adjustable supporting platform, and the adjusting nut is located below the adjustable supporting platform to adjust the height and the flatness of the adjustable supporting platform.

Specifically, the adjustable supporting platform is provided with mounting holes with different apertures and located at different positions.

Optionally, the drive of the processing means is a hydraulic motor, which is connected to the hydraulic station via a hydraulic line and a return line.

Optionally, the welding gun is coupled to a wire feeder and a gas shielded welding machine.

In order to achieve the above object, a second embodiment of the present invention provides a bolt hole repairing and rebuilding method, including the following steps:

firstly, an X-axis platform is movably arranged on a bottom plate, a Y-axis platform is movably arranged on the X-axis platform, an adjustable supporting platform is fixed on the Y-axis platform, an X-axis driver drives the X-axis platform to move, and a Y-axis driver drives the Y-axis platform to move, so that the adjustable supporting platform is located at a position suitable for the machining mechanism and the inner hole surfacing mechanism to act;

the processing mechanism comprises a mounting side plate which can be mounted on the adjustable supporting platform, a driver arranged on one side of the mounting side plate, a connecting seat arranged on the other side of the mounting side plate and connected with the driver, and a cutter connected with the connecting seat; the inner hole surfacing mechanism comprises a supporting plate which can be arranged on the adjustable supporting platform, a rotating part which is arranged on the supporting plate and a welding gun which is arranged on the rotating part;

secondly, mounting the machining mechanism on the adjustable supporting platform, wherein a cutter of the machining mechanism adopts a drill bit to remove original threads and fatigue layers of bolt holes;

thirdly, replacing the inner hole surfacing mechanism to the adjustable supporting platform, driving the rotating part to rotate by the C-axis driver to drive the welding gun to rotate, and surfacing the bolt hole with the original thread and the fatigue layer removed;

and fourthly, replacing the machining mechanism to the adjustable supporting platform, and respectively selecting a boring cutter and a screw tap to bore and tap the bolt hole after surfacing so as to repair and reproduce the bolt hole.

According to the bolt hole repairing and reconstructing method provided by the embodiment of the invention, when the bolt hole is repaired, the X-axis platform and the Y-axis platform of the base mechanism are moved, the adjustable supporting platform is positioned at a position suitable for the action of the machining mechanism and the inner hole surfacing mechanism, the cutter of the machining mechanism removes the original threads and fatigue layers of the bolt hole, the inner hole surfacing mechanism is replaced on the adjustable supporting platform after the original threads and fatigue layers are removed, the bolt hole from which the original threads and fatigue layers are removed is subjected to surfacing welding, a surfacing material can be made of a material with better hardness, then the machining mechanism is replaced on the adjustable supporting platform, and the bolt hole subjected to surfacing welding is subjected to boring and tapping treatment by using the boring cutter and the screw tap respectively, so that the repairing and reconstructing of the bolt hole are completed, the on-site quick repairing is realized, the repairing efficiency is improved, and the service life of the bolt hole is prolonged.

In addition, the bolt hole repairing and reconstructing method provided by the above embodiment of the invention may further have the following additional technical features:

optionally, before the first step, a center line of the bolt hole is drawn, the height of the adjustable supporting platform and the center position of the bolt hole is measured, and the bottom plate is debugged and fixed.

Optionally, the X-axis driver, the Y-axis driver and the C-axis driver are controlled in their actions by a motion controller.

Drawings

FIG. 1 is a schematic structural diagram of a base mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic view of an assembly of a processing mechanism according to an embodiment of the invention;

FIG. 3 is a schematic view of the assembly of a hardfacing mechanism according to an embodiment of the present invention.

Description of the reference symbols

Base mechanism 1 bottom plate 11

X-axis platform 12 and Y-axis platform 13

T-shaped groove 131 adjustable supporting platform 14

X-axis driver 15Y-axis driver 16

Screw 17 lock nut 18

Adjusting nut 19 processing mechanism 2

Mounting side plate 21 driver 22

Connecting seat 23 cutter 24

Return line 26 of hydraulic line 25

Hydraulic station 27 inner hole surfacing mechanism 3

Rotating part 32 of support plate 31

Welding gun 33C-axis driver 34

Wire feeder 35 gas shielded welder 36

The controller 4 moves the bolt hole 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 3, a bolt hole repairing and reconstructing device according to an embodiment of the present invention includes a base mechanism 1, a machining mechanism 2, an inner hole overlay welding mechanism 3, and a mobile controller 4.

The base mechanism 1 comprises a bottom plate 11, an X-axis platform 12 movably arranged on the bottom plate 11, a Y-axis platform 13 movably arranged on the X-axis platform 12 and an adjustable supporting platform 14 fixed on the Y-axis platform 13; the X-axis platform 12 is driven to move by an X-axis driver 15, the X-axis driver 15 can drive a screw rod to rotate, the screw rod is connected with the X-axis platform 12 to drive the X-axis platform 12 to move, the Y-axis platform 13 is driven to move by a Y-axis driver 16, the Y-axis driver 16 can drive the screw rod to rotate, and the screw rod is connected with the Y-axis platform 13 to drive the Y-axis platform 13 to move.

Optionally, a "T" shaped groove 131 is formed on the Y-axis platform 13, a screw 17 is disposed in the "T" shaped groove 131, a threaded portion of the screw 17 is connected to the adjustable supporting platform 14, a locking nut 18 and an adjusting nut 19 are respectively connected to the threaded portion of the screw 17, the locking nut 18 is located above the adjustable supporting platform 14, and the adjusting nut 19 is located below the adjustable supporting platform 14 to adjust the height and the flatness of the adjustable supporting platform 14. Specifically, the adjustable support platform 14 is provided with mounting holes with different apertures and at different positions.

The processing mechanism 2 can be mounted on the adjustable supporting platform 14, the processing mechanism 2 comprises a mounting side plate 21 which can be mounted on the adjustable supporting platform 14, a driver 22 which is arranged on one side of the mounting side plate 21, a connecting seat 23 which is arranged on the other side of the mounting side plate 21 and is connected with the driver 22, and a cutter 24 which is connected with the connecting seat 23, and the cutter 24 is a drill bit, a boring cutter or a screw tap. The mounting side plate 21 is mounted in a mounting hole of the adjustable support platform 14 by a locking rod.

Alternatively, the drive 22 of the processing device 2 is a hydraulic motor, which is connected to a hydraulic station 27 via a hydraulic line 25 and a return line 26.

The inner bore overlaying mechanism 3 can be arranged on the adjustable supporting platform 14 and comprises a supporting plate 31 arranged on the adjustable supporting platform 14, a rotating part 32 arranged on the supporting plate 31 and a welding gun 33 arranged on the rotating part 32; the rotary part 32 is driven in rotation by a C-axis drive 34. The support plate 31 is mounted in the mounting hole of the adjustable support platform 14 by means of a locking screw. Optionally, the welding torch 33 is connected with a wire feeder 35 and a gas shielded welder 36, and the welding material is stainless steel or alloy steel with high corrosion resistance and high strength.

The movement controller 4 is respectively connected with the X-axis driver 15, the Y-axis driver 16 and the C-axis driver 34 and controls the actions of the X-axis driver, the Y-axis driver and the C-axis driver, so that the track running of the inner bore surfacing is controlled.

According to the bolt hole repairing and reconstructing device disclosed by the embodiment of the invention, when a bolt hole is repaired, the X-axis platform and the Y-axis platform of the base mechanism move to enable the adjustable supporting platform to be located at a position suitable for the action of the machining mechanism and the inner hole surfacing mechanism, the cutter of the machining mechanism removes the original threads and fatigue layers of the bolt hole, the inner hole surfacing mechanism is replaced on the adjustable supporting platform after the original threads and fatigue layers are removed, the bolt hole from which the original threads and fatigue layers are removed is subjected to surfacing welding, a surfacing material can be made of a material with better hardness, then the machining mechanism is replaced on the adjustable supporting platform, boring cutters and tapping are respectively used for boring and tapping the bolt hole after surfacing welding, the repairing and reconstructing of the bolt hole are completed, the quick repairing on-site is realized, the repairing efficiency is improved, and the service life of the bolt hole is prolonged.

In order to achieve the above object, a second embodiment of the present invention provides a bolt hole repairing and rebuilding method, including the following steps:

firstly, according to the material and damage condition of the bolt hole to be repaired, stainless steel or alloy steel material with high corrosion resistance and high strength is selected for repairing and remanufacturing the bolt hole. According to the position of the bolt hole to be repaired, an operation platform is erected so as to facilitate operation of an operator, and the base mechanism 1 is installed on the operation platform. The base mechanism 1 comprises a bottom plate 11, an X-axis platform 12 movably arranged on the bottom plate 11, a Y-axis platform 13 movably arranged on the X-axis platform 12 and an adjustable supporting platform 14 fixed on the Y-axis platform 13; the X-axis table 12 is moved by an X-axis driver 15, and the Y-axis table 13 is moved by a Y-axis driver 16. Drawing the center line of the repaired bolt hole, measuring the height of the adjustable supporting platform 14 and the center position of the bolt hole, debugging and fixing the bottom plate 11.

Secondly, the X-axis platform 12 is movably arranged on the bottom plate 11, the Y-axis platform 13 is movably arranged on the X-axis platform 12, the adjustable supporting platform 14 is fixed on the Y-axis platform 13, the X-axis driver 15 drives the X-axis platform 12 to move, and the Y-axis driver 15 drives the Y-axis platform 13 to move, so that the adjustable supporting platform 14 is located at a position suitable for the actions of the machining mechanism 2 and the inner hole surfacing mechanism 3.

The processing mechanism 2 comprises a mounting side plate 21 which can be mounted on the adjustable supporting platform 14, a driver 22 which is arranged on one side of the mounting side plate 21, a connecting seat 23 which is arranged on the other side of the mounting side plate 21 and is connected with the driver 22, and a cutter 24 which is connected with the connecting seat 23, wherein the cutter 24 is a drill flower, a boring cutter or a screw tap.

The hardfacing mechanism 3 includes a support plate 31 mountable on the adjustable support platform 14, a rotating member 32 mounted on the support plate 31, and a weld gun 33 mounted on the rotating member 32.

Thirdly, the machining mechanism 2 is arranged on the adjustable supporting platform 14, and the cutter 24 of the machining mechanism 2 selects a drill flower to remove the original threads and the fatigue layer of the bolt hole 5.

The power input end of the hydraulic motor is connected to the hydraulic station through a high-pressure hydraulic pipe and a return pipeline. The diameter and depth of the threaded drill hole corroded and worn by the original bolt hole 5 are enlarged, and the original threads and fatigue layers are completely removed. The rotating speed range of the hydraulic motor is 1-11r/min, the driving-hydraulic pressure is 1050bar, the power of the motor of the power hydraulic station is 3.7-5.5KW, and the maximum drilling diameterThe hydraulic motor realizes the free switching of forward and reverse rotation through the control of the power hydraulic station.

Fourthly, replacing the inner hole surfacing mechanism 3 on the adjustable supporting platform 14, driving the rotating part 32 to rotate by the C-axis driver 34 to drive the welding gun 33 to rotate, and surfacing the bolt hole 5 with the original thread and the fatigue layer removed.

The welding torch 33 is connected to a gas shielded welder 36 and a mating wire feeder 35. And the inner hole overlaying mechanism 3 runs along the track, and the moving controller 4 controls the C-axis driver 34, the X-axis driver 15 and the Y-axis driver 16 to carry out overlaying molding on the inner hole. The C-axis driver 34 adjusts the rotating speed to be 0 to 20r/min in an electrodeless way, and the diameter of the minimum welding inner hole is larger thanThe selected welding wire has the advantages of corrosion resistance, high strength, stainless steel or alloy steel material and diameter of the welding wireSurfacing current: 50-160A, surfacing speed: 300-500mm/min, thickness of surfacing: 2-3.5mm, and the percentage of land: 2-4mm, air flow: 15-20L/min. The gas is carbon dioxide or mixed gas (80% Ar + 20% CO)₂)。

And fifthly, replacing the machining mechanism 2 on the adjustable supporting platform 14, and respectively selecting a boring cutter and a screw tap to bore and tap the overlaid bolt hole 5, so as to repair and re-create the bolt hole 5.

And firstly boring the bolt hole 5 after overlaying. The output end of the hydraulic motor is connected with a boring cutter, and the boring cutter is processed to meet the requirement of the bottom diameter of the bolt hole 5. After the boring processing is finished, the output end of the hydraulic motor is connected with a screw tap, and the repair and reconstruction of the bolt hole 5 are finished. The rotating speed range of the hydraulic motor is 1-11r/min, the driving-hydraulic pressure is 1050bar, the power of the motor of the power hydraulic station is 3.7-5.5KW, the maximum tapping diameter is M72, and the hydraulic motor realizes free switching of forward rotation and reverse rotation through the control of the power hydraulic station. The operation can be manual operation or single-dimensional or multi-dimensional linkage operation by a controller.

Sixthly, cleaning burrs of the bolt holes 5, and performing trial assembly detection by using corresponding bolts after cleaning.

According to the bolt hole repairing and reconstructing method, when the bolt hole is repaired, the X-axis platform and the Y-axis platform of the base mechanism move, the adjustable supporting platform is located at a position suitable for the machining mechanism and the inner hole surfacing mechanism to act, the cutter of the machining mechanism removes original threads and fatigue layers of the bolt hole, the inner hole surfacing mechanism is replaced to the adjustable supporting platform after the original threads and fatigue layers are removed, the bolt hole from which the original threads and fatigue layers are removed is subjected to surfacing welding, surfacing welding materials can be made of materials with good hardness, then the machining mechanism is replaced to the adjustable supporting platform, boring cutters and screw taps and tapping are respectively used for the bolt hole after surfacing welding, repairing and reconstructing of the bolt hole are completed, rapid on-site repairing is achieved, repairing efficiency is improved, and the service life of the bolt hole is prolonged.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means 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 with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.