CN117778700A - In-situ reduction regulation device and method for welding residual stress of service steel bridge - Google Patents
In-situ reduction regulation device and method for welding residual stress of service steel bridge Download PDFInfo
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- CN117778700A CN117778700A CN202311701078.1A CN202311701078A CN117778700A CN 117778700 A CN117778700 A CN 117778700A CN 202311701078 A CN202311701078 A CN 202311701078A CN 117778700 A CN117778700 A CN 117778700A
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Abstract
The invention discloses an in-situ reduction regulation device and method for welding residual stress of a service steel bridge, which comprises the following steps: the center of the supporting bottom plate is provided with a through hole, and the end part of the supporting bottom plate is provided with a mounting hole; the fixing mechanism is arranged at the mounting hole and used for fixing the supporting bottom plate close to a welding seam of the steel bridge; the support sleeve is arranged at the through hole through the adjusting mechanism and can move up and down along the axis direction of the through hole; the ultrasonic exciter is fixed at the lower end of the inner part of the supporting sleeve, and the transmitting end of the ultrasonic exciter extends out of the through hole and is attached to the surface of the plate-type member of the steel structure bridge for eliminating residual stress of the member. The invention adopts a nondestructive in-situ reduction regulation method, avoids damaging the surface of the component, reduces the maintenance cost, and solves the problem that the prior art is difficult to reduce the residual stress of the plate component in the narrow space position and various space attitudes of the steel bridge.
Description
Technical Field
The invention belongs to the technical field of stress regulation and control, and particularly relates to an in-situ reduction regulation and control device and method for welding residual stress of a service steel bridge, which are suitable for eliminating the residual stress of large-scale components such as bridge steel rails and the like in the service process.
Background
Ferromagnetic materials may develop residual stresses during processing and use. These residual stresses are caused by the material undergoing heat treatment, plastic deformation, welding, etc. The deformation and the non-uniform deformation rate of the ferromagnetic material in the processing process and the non-uniform temperature change of different parts can possibly cause the generation of internal stress.
The generation of stress may cause shape changes, deformation, and performance degradation of the ferromagnetic material. Therefore, in order to ensure stability and reliability of the material, control and relief of residual stress need to be considered. Residual stresses in the ferromagnetic material may be reduced or eliminated by appropriate material selection, process control, and heat treatment.
Conventional residual stress control methods include heat treatment, surface treatment, cold working, prestressing and residual stress relief. The heat treatment reduces residual stress by heating and cooling the material to alter its crystal structure and texture. Surface treatment methods such as shot blasting, mechanical grinding, chemical treatment, etc. change the properties of the material surface, reducing residual stress.
Conventional residual stress control methods have several drawbacks when used with large components. First, the process is inefficient, requiring longer process times and higher energy consumption due to the complex geometry and size of the large components, increasing costs and production cycle time. Second, it is difficult to implement, and the handling equipment and processes for large components are limited, such as oven size, accessibility of mechanical handling equipment, etc., increasing implementation difficulties. In addition, the distribution and variation of residual stress is difficult to predict and control accurately, and the conventional method is difficult to provide accurate control and adjustment means, so that the design requirements are difficult to meet. For local areas of large components, the traditional method is difficult to realize local accurate control, so that stress distribution is uneven, and service performance and service life are affected. Finally, some conventional processes may negatively impact material properties, such as grain boundary coarsening and material embrittlement caused by high temperature heat treatment, cold working introducing stress concentrations and damage. Therefore, in the residual stress control of a large-sized member, these factors need to be comprehensively considered.
At present, the steel structure bridge mainly adopts a welding process to connect parts. The welding is an efficient and economical connecting method, so that parts can be connected more firmly, and long-distance connection can be realized. However, the problem of weld cracking commonly occurs in the existing steel structure bridge, so that the service life of the bridge is shortened, and the maintenance and replacement cost is increased. However, the cracked weld may cause further damage, which may cause serious safety problems including weakening of structural strength, reduction of bearing capacity, and even collapse or partial collapse of the bridge.
Disclosure of Invention
Based on the defects of the prior art, the invention aims to provide an in-situ reduction regulation device and method for welding residual stress of a service steel bridge, which adopt a non-destructive in-situ reduction regulation method to avoid damage to the surface of a component and reduce maintenance cost so as to solve the problem that the prior art is difficult to reduce the residual stress of a plate component in a narrow space position and various space postures of the steel bridge.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the first aspect of the invention provides an in-situ reduction regulation device for welding residual stress of a service steel bridge, which comprises the following components: the center of the supporting bottom plate is provided with a through hole, and the end part of the supporting bottom plate is provided with a mounting hole; the fixing mechanism is arranged at the mounting hole and used for fixing the supporting bottom plate close to a welding seam of the steel bridge; the support sleeve is arranged at the through hole through the adjusting mechanism and can move up and down along the axis direction of the through hole; the ultrasonic exciter is fixed at the lower end of the inner part of the supporting sleeve, and the transmitting end of the ultrasonic exciter extends out of the through hole and is attached to the surface of the plate-type member of the steel structure bridge for eliminating residual stress of the member.
By the method for eliminating the residual stress of the welding seam by using the ultrasonic exciter, the stress reduction regulation and control work can be completed under the condition that the paint coating on the surface of the component is not damaged. The device is suitable for eliminating residual stress of large-scale components such as bridge steel rails and the like in the service process, a plurality of ultrasonic exciters are arranged along welding seams, and high-energy sound beams are injected into stress concentration areas, so that the effects of reducing and homogenizing the welding residual stress are achieved, the local accurate residual stress elimination is realized, and the service life and safety of the components are effectively improved. The ultrasonic exciter can be well adhered to the surface of the plate-like component, and the residual stress of the component in a narrow space and a special-shaped area is eliminated. Meanwhile, a nondestructive in-situ reduction regulation method is adopted, so that damage to the surface of the component is avoided, and the maintenance cost is reduced.
Further, the fixing mechanism is a magnetic clamp holder which is fixedly connected to the mounting hole of the supporting bottom plate; the magnetic clamp holder fixes the supporting bottom plate in a space plane with any angle in a magnetic attraction mode.
By above, utilize the magnetic clamp holder to be fixed the supporting baseplate on waiting to regulate and control the component through the mode that the magnetism is inhaled, can make things convenient for the user to operate from this, reduced the degree of difficulty of fixing regulation and control device in narrow space. In addition, the magnetic switch is connected with the plate members, so that the plate members are prevented from being pressed and deformed, and secondary damage to the plate members is avoided.
Optionally, the mounting hole is in a U shape, the opening of the mounting hole faces outwards, and bosses for supporting and fixing the magnetic clamp holder are arranged at the tops of two ends of the U-shaped opening; the magnetic suction end of the magnetic absorber penetrates through the U-shaped opening and is flush with or protrudes out of the bottom surface of the supporting bottom plate.
By the above, the magnetic absorber directly adsorbs the plate-like member through the U-shaped opening, and the supporting bottom plate can be more stably fixed, so that the supporting bottom plate and the ultrasonic exciter can be tightly pressed on the surface of the member to be regulated, and high-energy sound beams generated by the ultrasonic exciter are injected into the member to be regulated as much as possible. In addition, the operation and fixation are not needed by redundant operation tools, and the operation space can be reduced, so that the regulation and control device is convenient to use in a narrow space.
Optionally, the adjusting mechanism comprises a bolt penetrating through a flange plate at the bottom of the supporting sleeve and a compression spring pressed on the flange plate by the head of the bolt, and the bottom of the bolt is in threaded connection with a threaded hole on the supporting bottom plate, which is positioned around the through hole.
The elastic force provided by the compression spring pushes the support sleeve and the ultrasonic exciter to move towards the member to be regulated, so that the extrusion force for moving between the ultrasonic exciter and the member is kept, and the stability of connection between the ultrasonic exciter and the member is improved. In addition, the compression spring can control the fixed ultrasonic exciter to float in the up-down direction, so that the compression amount between the ultrasonic exciter and the plate-type components can be adjusted by adjusting the compression spring, and the damage to the plate-type components due to the overlarge compression amount between the ultrasonic exciter and the plate-type components is avoided.
Furthermore, a coupling agent is coated between the transmitting end of the ultrasonic exciter and the contact surface of the plate-like member of the steel structure bridge, and high-energy sound beams emitted by the ultrasonic exciter are transmitted and injected into the metal through the coupling agent.
The coupling agent is arranged between the ultrasonic exciter and the member to be regulated, so that the attaching effect of the transmitting end of the ultrasonic exciter and the member to be regulated can be improved, the high-energy sound beam is injected into the member to be regulated more efficiently, the loss of the high-energy sound beam entering the member to be regulated is reduced, and the reduction effect of residual stress in the member to be regulated is improved.
Optionally, the shape of the welding seam in the narrow space of the supporting bottom plate and the steel structure bridge is matched, and the welding seam is rectangular, L-shaped or triangular.
By the above, the residual stress of a narrow space and a special-shaped area (such as right angles, triangles, T-shapes, polygonal junction and the like) is eliminated through different shapes of the supporting bottom plate, and the regulation and control of the residual stress of the high-energy sound beam are completed, so that the reliability of the regulation and control result of the residual stress is guaranteed to the greatest extent.
Further, the barrel body of the support sleeve is provided with a heat dissipation hole.
The heat generated by the ultrasonic exciter can be transferred to the outside air through the heat dissipation holes, so that the temperature of equipment arranged in the support sleeve is reduced.
Further, the top end of the supporting sleeve is connected with an upper cover in a threaded mode, and a through hole for installing an aviation plug of the ultrasonic exciter is formed in the center of the upper cover.
The invention provides a method for in-situ reduction and regulation of welding residual stress of a service steel bridge, which comprises the following steps:
the magnetic clamp holder is fixedly connected to a mounting hole at the end part of the supporting bottom plate, the ultrasonic exciter is fixed at the inner lower end of the supporting sleeve, the flange plate at the bottom of the supporting sleeve is fixed on the top surface of the supporting bottom plate through a bolt compression spring, and the transmitting end of the ultrasonic exciter extends out of a through hole at the center of the supporting bottom plate;
turning on a knob switch at the top of the magnetic clamp holder to generate suction force, and adsorbing and fixing a supporting bottom plate on a plate-type member with a welding line of the steel structure bridge;
the transmitting end of the ultrasonic exciter is close to the welding seam position needing residual stress regulation, the high-energy sound beam emitted by the ultrasonic exciter is injected into the metal, and the energy of the high-energy sound beam is utilized to change the lattice structure in the metal material, so that the residual stress is released and eliminated.
Further, the supporting bottom plate is installed at a narrow space position of the steel structure bridge through the magnetic clamp, and the ultrasonic exciter is placed at a position closest to a welding line of the plate type member of the steel structure bridge.
The flange plate of the supporting sleeve is pressed on the supporting bottom plate through the fastening bolts and the compression springs, so that the ultrasonic exciter is fixed on the top surface of the supporting bottom plate by the pressing force generated by the bolts and the compression springs, and therefore high-energy sound beams can be effectively transmitted into the residual stress concentration area of the component, and the regulation and control effect is improved; the ultrasonic exciter protrudes out of the supporting bottom plate to leave the rebound quantity, so that the ultrasonic exciter is compressed on the contact surface of the component by matching with the compression of the compression spring, and therefore the regulation and control signal sent by the ultrasonic exciter can be effectively transmitted to the stress concentration area to improve the stress regulation and control effect, and the problem that the residual stress of the welding line is reduced and controlled in the narrow space position and various space postures of the steel bridge in the service process is difficult to process in the prior art is effectively solved.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as to provide further clarity and understanding of the above and other objects, features and advantages of the present invention, as described in the following detailed description of the preferred embodiments, taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic structural diagram of a regulating device of a 180 DEG regulating tool of the invention;
FIG. 2 is a bottom oblique view of FIG. 1;
FIG. 3 is a front view of FIG. 1;
FIG. 4 is a top view of FIG. 1;
FIG. 5 is a bottom view of FIG. 1;
FIG. 6 is a schematic structural diagram of a regulating device of the 90 degree regulating tool of the present invention;
FIG. 7 is a rear oblique view of FIG. 6;
FIG. 8 is a bottom oblique view of FIG. 6;
FIG. 9 is a side view of FIG. 6;
fig. 10 is a top view of fig. 6.
10, supporting a bottom plate; 11. a boss; 12. a threaded hole; 20. a support sleeve; 21. a flange plate; 30. a magnetic clamp; 31. a knob switch; 40. an ultrasonic exciter; 50. a bolt; 60. a compression spring; 70. and (5) an upper cover.
Detailed Description
The following detailed description of the invention, taken in conjunction with the accompanying drawings, illustrates the principles of the invention by way of example and by way of a further explanation of the principles of the invention, and its features and advantages will be apparent from the detailed description. In the drawings to which reference is made, the same or similar components in different drawings are denoted by the same reference numerals.
As shown in fig. 1 to 10, the present invention provides an in-situ reduction regulation device and method for welding residual stress of a service steel bridge, which mainly includes a support base plate 10, a support sleeve 20, a magnetic clamp 30 (fixing mechanism), and an ultrasonic exciter 40, wherein the support base plate 10 is provided with a through hole and a mounting hole for fixedly supporting other parts, and the support base plate 10 can be designed into various angle forms (including but not limited to rectangle, L-shape or triangle) according to the form of a welding seam, such as a straight welding seam, a right angle welding seam, a three-dimensional arbitrary space welding seam, and the shape of the welding seam in a narrow space of the steel bridge, so as to meet the requirement of residual stress reduction regulation of different welding positions. The support base plate 10 may be designed in various shapes according to the use requirement, and is not limited in terms of material selection. The end of the supporting bottom plate 10 adopts a U-shaped design to form a U-shaped opening with an outward opening, the U-shaped opening is used as a mounting hole and is used as a fixing structure of the magnetic clamp holder 30, the magnetic clamp holder 30 is fixedly connected to the end of the supporting bottom plate 10 through the U-shaped opening, the magnetic clamp holder 30 can have stronger attraction through a knob switch 31 at the top of the magnetic clamp holder 30, and the magnetic clamp holder 30 fixes the supporting bottom plate 10 in a space plane with any angle in a magnetic attraction mode. Therefore, the magnetic clamp holder 30 can be placed in a top suction and side suction mode, so that the adjusting device can complete work in a space plane with any angle, and the magnetic clamp holder 30 is used for fixing the support bottom plate 10 close to a welding seam of a steel bridge. The top of the magnetic clamp holder 30 is provided with a knob switch 31, a magnet is arranged inside the magnetic clamp holder, and the magnetism of the magnetic clamp holder 30 can be controlled by changing the state of the knob switch 31. The magnetic clamp 30 is designed by utilizing the principle of continuity of magnetic flux and the principle of superposition of magnetic fields, the magnetic circuit of the magnetic clamp is designed into a plurality of magnetic systems, and the addition or the cancellation of the magnetic field intensity on the working magnetic pole face is realized by the relative movement of the magnetic systems, so that the purposes of holding and unloading are achieved. The magnetic clamper 30 can control its magnetism by the switching state, namely: the magnetic clamp 30 is opened to generate strong magnetism to fix the supporting base plate 10 on the plate-like member at the beginning of the work, and the magnetic clamp 30 is closed to remove the magnetic attraction force at the end of the work, so that the supporting base plate 10 is detached.
Meanwhile, bosses 11 are arranged at the tops of two ends of the U-shaped opening of the supporting bottom plate 10 and used for supporting and fixing the magnetic clamp holder 30, the magnetic attraction end of the magnetic adsorber 30 penetrates through the U-shaped opening and is flush with or protrudes out of the bottom surface of the supporting bottom plate 10, and the magnetic attraction end of the magnetic adsorber 30 is adsorbed with the plate-type components. Because the adsorption effect of the magnetic clamp holder 30 is reduced due to the fact that the weight of the tool is too large, the thickness of the supporting bottom plate 10 is reduced as much as possible on the premise of meeting the structural strength. The support base plate 10 cannot meet the requirement of fixedly supporting the magnetic clamp holder 30 in the case of thickness reduction, so that the boss 11 is designed on the U-shaped opening for supporting the fixedly supporting magnetic clamp holder 30. The height of the boss 11 is not limited to accommodate the magnetic holders 30 of different model sizes, and the center of the boss 11 is provided with a fixing hole which is matched with the through hole of the magnetic holder 30, and the magnetic holder 30 is locked on the boss 11 by a screw.
The center of the support base plate 10 is provided with a through hole, and the periphery of the through hole is provided with a screw hole 12. The bottom of the bolt 50 is in threaded connection with the threaded hole 12, the supporting sleeve 20 is installed on the supporting base plate 10 through the cooperation of the bolt 50 and the threaded hole 12, the central axis of the supporting sleeve 20 coincides with the central axis of the through hole of the supporting base plate 10, the compression spring 60 is sleeved on the threaded rod of the bolt 50, and the supporting sleeve 20 compresses the compression spring 60 through the bolt 50 to fix the compression spring on the supporting base plate 10. The bottom of the support sleeve 20 is provided with a flange plate 21 fixedly connected with the support sleeve, through holes which are uniformly distributed at intervals are formed in the flange plate 21 along the circumferential direction of the flange plate, the through holes are in one-to-one correspondence with and matched with the threaded holes 12 around the support bottom plate 10, the flange plate 21 is connected with the support bottom plate 10 by adopting bolts 50 in a fixing mode, the flange plate 21 is pressed against the compression spring 60 by the bolts 50 to be fixed on the top surface of the support bottom plate 10, and the support sleeve 20 can move up and down along the axial direction of the through holes of the support bottom plate 10 under the condition of stress.
The bolt 50 and the compression spring 60 form an adjusting mechanism, so that the pressing force of the support sleeve 20 can be controlled by the tightness degree of the compression spring 60.
In addition, the support sleeve 20 is provided with heat radiation holes on the drum body for the circulation flow of air to reduce the temperature of the equipment installed in the support sleeve 20. The upper and lower ends of the support sleeve 20 are provided with screw holes, the screw holes at the lower end of the support sleeve 20 are used for locking the ultrasonic exciter 40 by the jackscrews, and the screw holes at the upper end are used for locking the upper cover 70 by the jackscrews. The upper cover 70 is made of an insulating material to prevent the equipment from being leaked to hurt people. The center of the upper cover 70 is provided with a through hole for mounting an aviation plug of the ultrasonic exciter 40. The outer wall of the upper cover 70 is provided with threads for fixing to the top end of the support sleeve 20 after installation. By using an insulating material for the upper cover 70, occurrence of electric leakage can be avoided.
An ultrasonic exciter 40 is fixed at the inner lower end of the support sleeve 20, and the ultrasonic exciter 40 is fixedly connected with the support sleeve 20 through jackscrews. The transmitting end of the ultrasonic exciter 40 extends out of the through hole of the supporting base plate 10 and is attached to the surface of the plate-like member of the steel structure bridge for eliminating the residual stress of the member. The ultrasonic exciter 40 extends out of the supporting bottom plate 10, the transmitting end of the ultrasonic exciter 40 serving as a working plane can be in direct contact with the regulated plate-type components, and the purpose of pressing the flange plate 21 by the bolts 50 through the compression springs 60 is to reserve the degree of freedom of the ultrasonic exciter 40 along the up-and-down movement direction of the supporting sleeve 20, so that the plate-type components can be prevented from being pressed and deformed, and damage to the plate-type components can be avoided. The device adopts the high-energy sound beam emitted by the ultrasonic exciter 40 to regulate and control the residual stress in the steel member, and the high-energy sound beam emitted by the ultrasonic exciter 40 has the characteristics of high regulation and control rate, high reduction rate, high homogenization rate and the like, so that the safety and the service life of the steel member can be effectively improved. Parameters of the modulating signal (high energy beam) emitted by the ultrasonic exciter 40 are adjustable to accommodate different ferromagnetic plate-like members to be modulated, wherein the parameters include frequency, amplitude, phase, waveform, and/or angle of incidence. The frequency of the high-energy sound beam generated by the ultrasonic exciter 40 is 5KHz-50KHz, and the output power is 10-400W. By adjusting parameters of the regulating and controlling signals, the optimal residual stress eliminating and homogenizing effects are achieved, and the residual stress regulating and controlling precision is improved.
The tool (180 DEG regulating tool or 90 DEG regulating tool) is placed on the surface of a plate-type member of a steel bridge, and the knob switch 31 of the magnetic clamp holder 30 is rotated to generate suction force. The surface of the plate member may be at any angle, and the support base plate 10 may be closely attached to the surface of the plate member under suction. The straight weld may employ a 180 ° adjustment tooling (as shown in fig. 1-5) such that the ultrasonic exciter 40 may be more closely positioned to the weld location where residual stress adjustment is desired. The right angle weld may be formed using a 90 degree adjustment tool (as shown in fig. 6-10) to bring the two right angle sides of the support base plate 10 into close proximity with the two sides of the right angle weld, and the ultrasonic exciter 40 will be positioned closest to the weld.
Under the action of the attraction force of the magnetic clamp holder 30, the supporting bottom plate 10 is pressed on the surface of the plate-like member, under the action of the pressing force, the ultrasonic exciter 40, the transmitting end of which extends out of the through hole in the center of the supporting bottom plate 10, is reversely jacked, the ultrasonic exciter 40 is fixedly connected with the supporting sleeve 20, and the ultrasonic exciter 40 is pressed on the surface of the plate-like member under the action of the elastic force of the compression spring 60.
The coupling agent is coated between the transmitting end of the ultrasonic exciter 40 and the contact surface of the plate-like member of the steel structure bridge, the high-energy sound beam emitted by the ultrasonic exciter 40 is transmitted and injected into the metal through the coupling agent, and the residual stress of the metal is removed, namely the energy of the high-energy sound beam is utilized to change the lattice structure in the metal material, so that the residual stress is released and eliminated. Such high energy acoustic beams can generate stress waves within the metallic material, resulting in small displacements and stress variations of the crystal lattice. These small changes can release and eliminate the residual stress in the metal material, thereby achieving the purpose of removing the residual stress. In addition, the high-energy sound beam can also influence the stress distribution inside the metal material by changing the grain size and shape of the metal material. Thus, the residual stress can be balanced and dispersed, and the effect of removing is achieved.
During use, heat generated by the ultrasonic exciter 40 is transferred to the outside air through the heat dissipation holes formed in the body of the support sleeve 20. Such tooling has the advantage of being able to be absorbed on the surface of a plate-like member placed at any angle. Meanwhile, due to the design mode of the supporting bottom plate 10, the ultrasonic exciter 40 can work at a position closer to the position where the adjustment and control of the residual stress reduction are needed. The support sleeve 20 is used as a protective shell, so that the piezoelectric ceramic can be prevented from being electrically damaged due to false touch during use. The regulating device has small volume, light weight and simple use, and the magnetic absorber is utilized to absorb the plate members, so that firm installation can be effectively realized, and secondary damage such as indentation, deformation and the like is not caused to the plate members.
Based on the regulation and control device, the in-situ reduction regulation and control method for the welding residual stress of the service steel bridge comprises the following steps:
step S1, the magnetic clamp holder 30 is fixedly connected to a mounting hole at the end part of the supporting bottom plate 10, the ultrasonic exciter 40 is fixed at the inner lower end of the supporting sleeve 20, the flange 21 at the bottom of the supporting sleeve 20 is pressed by the bolt 50 to compress the compression spring 60 to be fixed on the top surface of the supporting bottom plate 10, and the transmitting end of the ultrasonic exciter 40 extends out of a through hole at the center of the supporting bottom plate 10;
s2, opening a knob switch 31 at the top of the magnetic clamp holder 30 to generate suction force, and adsorbing and fixing the support bottom plate 10 on a plate member of the steel structure bridge;
and S3, the emitting end of the ultrasonic exciter 40 is close to the welding seam position needing residual stress regulation, high-energy sound beams emitted by the ultrasonic exciter 40 are injected into the metal, and the energy of the high-energy sound beams is utilized to change the lattice structure in the metal material, so that the residual stress is released and eliminated.
The support base plate 10 of the present invention is installed at a spatially narrow position of a steel bridge by the magnetic clamper 30, and the ultrasonic exciter 40 is placed at a position nearest to the weld of the plate-like member of the steel bridge. For example, the fillet weld formed by mutually perpendicular welding of three plates, because the action range of the ultrasonic exciter 40 is not infinite, the welding residual stress is eliminated by adopting a 90-degree regulating tool, and the exciter can be more closely attached to the welding seam, so that the action effect is better. The 180-degree adjusting tool has a better laminating effect on long straight welding seams. Meanwhile, the tool is fixed by the magnetic clamp holder 30, and the tool can be firmly adsorbed on the plate no matter what angle the plate is positioned at.
While the invention has been described with respect to the preferred embodiments, it will be understood that the invention is not limited thereto, but is capable of modification and variation without departing from the spirit of the invention, as will be apparent to those skilled in the art.
Claims (10)
1. The utility model provides a device is regulated and control to in situ reduction of service steel structure bridge welding residual stress which characterized in that includes:
the center of the supporting bottom plate is provided with a through hole, and the end part of the supporting bottom plate is provided with a mounting hole;
the fixing mechanism is arranged at the mounting hole and used for fixing the supporting bottom plate close to a welding seam of the steel bridge;
the support sleeve is arranged at the through hole through the adjusting mechanism and can move up and down along the axis direction of the through hole;
the ultrasonic exciter is fixed at the lower end of the inner part of the supporting sleeve, and the transmitting end of the ultrasonic exciter extends out of the through hole and is attached to the surface of the plate-type member of the steel structure bridge for eliminating residual stress of the member.
2. The in-situ reduction and control device for welding residual stress of a service steel bridge according to claim 1, wherein the fixing mechanism is a magnetic clamp which is fixedly connected to the mounting hole of the supporting bottom plate;
the magnetic clamp holder fixes the supporting bottom plate in a space plane with any angle in a magnetic attraction mode.
3. The in-situ reduction and control device for welding residual stress of the service steel bridge according to claim 2, wherein the mounting hole is U-shaped, the opening of the mounting hole faces outwards, and bosses for supporting and fixing the magnetic clamp are arranged at the tops of two ends of the U-shaped opening;
the magnetic suction end of the magnetic absorber penetrates through the U-shaped opening and is flush with or protrudes out of the bottom surface of the supporting bottom plate.
4. The in-situ reduction and regulation device for welding residual stress of a service steel bridge according to claim 1, wherein the regulating mechanism comprises a bolt penetrating through a flange plate at the bottom of the supporting sleeve, and a compression spring pressed on the flange plate by the head of the bolt, and the bottom of the bolt is in threaded connection with a threaded hole on the supporting bottom plate, which is positioned around the through hole.
5. The in-situ reduction and regulation device for welding residual stress of the service steel-structured bridge according to claim 1, wherein a coupling agent is coated between the transmitting end of the ultrasonic exciter and the contact surface of the plate-like member of the steel-structured bridge, and high-energy sound beams emitted by the ultrasonic exciter are transmitted and injected into the metal through the coupling agent.
6. The in-situ reduction and control device for welding residual stress of a service steel structure bridge according to claim 1, wherein the support bottom plate is matched with the shape of a welding seam in a narrow space of the steel structure bridge, and is rectangular, L-shaped or triangular.
7. The in-situ reduction and control device for welding residual stress of a service steel bridge according to claim 1, wherein a cylinder body of the support sleeve is provided with a heat dissipation hole.
8. The in-situ reduction and regulation device for welding residual stress of a service steel bridge according to claim 1, wherein an upper cover is connected to the top end of the support sleeve in a threaded manner, and a through hole for installing an aviation plug of the ultrasonic exciter is arranged in the center of the upper cover.
9. An in-situ reduction regulation method for welding residual stress of a service steel bridge by using the regulation device as claimed in any one of claims 2 to 8, which is characterized in that: the method comprises the following steps:
the magnetic clamp holder is fixedly connected to a mounting hole at the end part of the supporting bottom plate, the ultrasonic exciter is fixed at the inner lower end of the supporting sleeve, the flange plate at the bottom of the supporting sleeve is fixed on the top surface of the supporting bottom plate through a bolt compression spring, and the transmitting end of the ultrasonic exciter extends out of a through hole at the center of the supporting bottom plate;
turning on a knob switch at the top of the magnetic clamp holder to generate suction force, and adsorbing and fixing a supporting bottom plate on a plate-type member with a welding line of the steel structure bridge;
the transmitting end of the ultrasonic exciter is close to the welding seam position needing residual stress regulation, the high-energy sound beam emitted by the ultrasonic exciter is injected into the metal, and the energy of the high-energy sound beam is utilized to change the lattice structure in the metal material, so that the residual stress is released and eliminated.
10. The method for in-situ reduction and regulation of welding residual stress of a service steel bridge according to claim 9, wherein the support base plate is installed at a narrow space of the steel bridge through the magnetic clamp, and the ultrasonic exciter is placed at a position closest to a welding seam of a plate member of the steel bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311701078.1A CN117778700A (en) | 2023-12-12 | 2023-12-12 | In-situ reduction regulation device and method for welding residual stress of service steel bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311701078.1A CN117778700A (en) | 2023-12-12 | 2023-12-12 | In-situ reduction regulation device and method for welding residual stress of service steel bridge |
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| Publication Number | Publication Date |
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| CN117778700A true CN117778700A (en) | 2024-03-29 |
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| CN202311701078.1A Pending CN117778700A (en) | 2023-12-12 | 2023-12-12 | In-situ reduction regulation device and method for welding residual stress of service steel bridge |
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| Country | Link |
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| CN (1) | CN117778700A (en) |
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- 2023-12-12 CN CN202311701078.1A patent/CN117778700A/en active Pending
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