CN215698736U - Device for removing residual stress of large thin-wall cylinder by girth welding - Google Patents
Device for removing residual stress of large thin-wall cylinder by girth welding Download PDFInfo
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Abstract
The utility model discloses a residual stress removing device for girth welding of a large thin-wall cylinder, which relates to the technical field of girth welding of large thin-wall cylinders and comprises an electromagnetic energy stress removing device and a pipeline matching device, wherein the pipeline matching device can support a cylinder weldment or support the cylinder weldment on the cylinder weldment, the electromagnetic energy stress removing device can process a welding seam of the cylinder weldment under the composite action of electromagnetic energy and heat energy, and the electromagnetic energy stress removing device comprises an induction heating magnetic head and an electromagnetic energy stress removing magnetic head. The utility model adopts the mode of compounding electromagnetic energy and thermal energy to realize the transformation of residual stress from a high energy state to a balance position (low energy state), thereby realizing the elimination of the residual stress.
Description
Technical Field
The utility model relates to the technical field of girth welding of large thin-wall cylinders, in particular to a residual stress removing device for girth welding of large thin-wall cylinders, which is suitable for hydraulic equipment used in the industries of military industry, aerospace industry, precision machining industry and the like.
Background
The welding is used in the fields of petrochemical industry, pressure vessels, aerospace, traffic buildings and the like, and the common fusion welding structure principle is formed after the joint and the filler metal are melted and cooled and solidified at a higher speed.
During welding, the welding joint material is rapidly cooled from a liquid state to a solid state, and the temperature of the welding joint material is increased, so that expansion and contraction are caused, and the volume of a welding piece is reduced. As the weld material joins the parent material, the deformation is constrained, resulting in residual stresses in the weld. The peak magnitude, distribution and the like of the residual stress of the welding joint can directly and seriously affect the comprehensive mechanical properties, fatigue strength, instability state, stress corrosion cracking and the like of a welding part or other mechanical components. Therefore, the method for removing the welding residual stress and homogenizing the stress distribution has important significance for improving the mechanical property of the welding component, improving the stability and the safety of the pressure container of the chemical equipment and prolonging the service life.
The method for treating the welding residual stress basically adopts the methods of integral heat treatment, thermal aging, vibration aging and the like. The residual stress can be effectively reduced by thermal aging, but the requirement on temperature control is strict, and additional thermal stress is easy to generate or the surface of the material is easy to oxidize; the mechanical property of the welded part is improved well by using a vibration aging method, and the defect that the fatigue strength of the workpiece cannot reach the standard after the residual stress is removed is easily caused.
The traditional method for treating the welding residual stress is high in cost and inconvenient to carry, and the material treated by the heat treatment method is softened in the subsequent process; moreover, the above-mentioned treatment method is not well suited for treating large thin-walled cylinders.
Therefore, it is desirable to provide a novel device for removing residual stress in girth welding of large-sized thin-walled cylinder to solve the above-mentioned disadvantages in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for removing residual stress in girth welding of a large thin-wall cylinder, which is used for solving the problems in the prior art, and realizes the conversion of the residual stress from a high energy state to a balance position (low energy state) by adopting an electromagnetic energy-thermal energy composite mode, thereby realizing the elimination of the residual stress.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides a residual stress removing device for girth welding of a large thin-wall cylinder, which comprises an electromagnetic energy stress removing device and a pipeline matching device, wherein the pipeline matching device can support a cylinder weldment or on the cylinder weldment, the electromagnetic energy stress removing device can process a welding seam of the cylinder weldment under the composite action of electromagnetic energy and heat energy, and the electromagnetic energy stress removing device comprises an induction heating magnetic head and an electromagnetic energy stress removing magnetic head.
Preferably, the pipeline matching device comprises a track and a stepping trolley, the track surrounds the cylinder weldment and is arranged close to the weld joint, the stepping trolley can perform circular motion on the track, and the electromagnetic energy destressing device is installed on the stepping trolley.
Preferably, a fixing plate is mounted on the stepping trolley through a spacing adjusting mechanism, the electromagnetic energy destressing device is mounted on the fixing plate, and the spacing adjusting mechanism can adjust the height distance and the left-right deviation between the electromagnetic energy destressing device and the welding line.
Preferably, the track is provided with a flexible adjusting track tool, and the track can be provided with a limiting hole.
Preferably, the pipeline matching device comprises a supporting wheel, a hydraulic lifting table and a supporting frame, the supporting frame can support the cylinder weldment, the supporting wheel is mounted on the supporting frame and is in contact with the cylinder weldment, and the electromagnetic energy destressing device is mounted on the hydraulic lifting table;
the supporting wheel is connected with a rotating motor, and the rotating motor drives the supporting wheel to rotate.
Preferably, a fixing plate is installed at the top of the hydraulic lifting platform, and the electromagnetic energy destressing device is installed on the fixing plate.
Preferably, the induction heating magnetic head comprises an induction heating magnetic head iron core and an induction heating magnetic head coil, the induction heating magnetic head coil surrounds the induction heating magnetic head iron core, and the induction heating magnetic head coil can be connected with a 300-300 kHz intermediate frequency induction power supply to preheat.
Preferably, the electromagnetic energy destressing head comprises an electromagnetic energy destressing head iron core and an electromagnetic energy destressing head coil, the electromagnetic energy destressing head coil is arranged around the electromagnetic energy destressing head iron core, and the electromagnetic energy destressing head coil can be connected with a controllable electromagnetic energy CEME special power supply for stress relief.
Preferably, the diameter of the cylinder weldment is 10m, and the wall thickness is 10 mm.
Compared with the prior art, the utility model has the following beneficial technical effects:
the device for removing the residual stress in the girth welding of the large-sized thin-wall cylinder provided by the utility model has the advantages that the magnetic-thermal composite action is adopted, the residual stress region at the welding seam of the welding piece has a good residual stress removing effect, and the performance of the welding piece is not influenced by adopting a non-contact mode;
the electromagnetic energy destressing device adopts the simultaneous action of electromagnetic heat and electromagnetic field, greatly improves the efficiency of operation and residual stress removal, and shortens the production cycle of products;
the electromagnetic energy destressing device has the advantages of adjustable parameters, wide application range, portability and suitability for different working environments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an isometric view of an embodiment of a residual stress removal device for girth welding of large thin-walled cylinders;
FIG. 2 is a front view of an embodiment of a device for removing residual stress in girth welding of a large thin-walled cylinder;
FIG. 3 is a left side view of an embodiment of a device for girth welding and residual stress removal of a large thin-walled cylinder;
FIG. 4 is a schematic structural diagram of the apparatus for removing residual stress in girth welding of a large-sized thin-walled cylinder according to the embodiment;
FIG. 5 is a diagram of a base of the large thin-walled cylinder girth welding residual stress removing device of the embodiment;
FIG. 6 is an isometric view of the embodiment dual residual stress removal device for girth welding of large thin-walled cylinders;
FIG. 7 is a front view of the apparatus for removing residual stress in large thin-walled cylinder girth welding of the embodiment;
FIG. 8 is a left side view of the embodiment of the residual stress removing device for girth welding of the large-sized thin-walled cylinder;
FIG. 9 is a schematic view of the four-hole strain method of the embodiment for testing residual stress;
description of reference numerals: the device comprises a 1-welding seam, a 2-rail, a 3-barrel welding part, a 4-electromagnetic energy destressing magnetic head coil, a 5-induction heating magnetic head coil, a 6-induction heating magnetic head iron core, a 7-fixing plate, an 8-electromagnetic energy destressing magnetic head iron core, a 9-spacing adjusting mechanism, a 10-stepping trolley, an 11-supporting frame, a 12-electromagnetic energy destressing device, a 13-supporting wheel, a 14-rotating motor and a 15-hydraulic lifting platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model aims to provide a device for removing residual stress in girth welding of a large thin-wall cylinder, which is used for solving the problems in the prior art, and realizes the conversion of the residual stress from a high energy state to a balance position (low energy state) by adopting an electromagnetic energy-heat energy composite mode, thereby realizing the elimination of the residual stress.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
As shown in fig. 1-3, the present embodiment provides a residual stress removing device for large thin-walled cylinder girth welding, which includes an electromagnetic energy destressing device 12 and a pipe matching device, wherein the pipe matching device can support the cylinder weldment 3 or support the cylinder weldment 3, the electromagnetic energy destressing device 12 can process the weld seam 1 of the cylinder weldment 3 under the combined action of electromagnetic energy and thermal energy, and the electromagnetic energy destressing device 12 includes an induction heating magnetic head and an electromagnetic energy destressing magnetic head.
In this embodiment, the pipe matching device includes a track 2 and a stepping trolley 10, the track 2 is surrounded near the weld seam 1 of the large thin-wall cylinder weldment 3, the electromagnetic energy destressing device 12 is installed on the stepping trolley 10, and the stepping trolley 10 performs circular motion on the track 2 to perform residual stress removal processing.
In the present embodiment, the electromagnetic-energy-destressing head is mainly composed of an electromagnetic-energy-destressing head core 8 and an electromagnetic-energy-destressing head coil 4, and the induction-heating head is mainly composed of an induction-heating head core 6 and an induction-heating head coil 5. The electromagnetic energy stress-removing magnetic head coil 4 is connected with a special controllable electromagnetic energy CEME power supply for stress removal, and the induction heating magnetic head coil 5 is connected with a 300-300 kHz medium-frequency induction power supply for preheating.
In the embodiment, the step trolley 10 is provided with the spacing adjusting mechanism 9 and the fixing plate 7, so that the height distance and the left-right deviation between the electromagnetic energy destressing device 12 and the welding seam 1 can be adjusted; specifically, the spacing adjusting mechanism 9 comprises an adjusting block and an adjusting rod, the adjusting block is arranged on the stepping trolley 10 in a left-right sliding mode, the adjusting rod is arranged on the adjusting block in a vertical sliding mode, the fixing plate 7 is connected to the adjusting rod, the electromagnetic energy destressing device 12 is arranged on the fixing plate 7, the fixing plate 7 and the electromagnetic energy destressing device 12 on the fixing plate are driven to move through the movement of the adjusting block and the adjusting rod, and therefore the height distance and the left-right deviation between the fixing plate 7 and the welding line 1 can be adjusted; the spacing adjustment mechanism 9 can also select other adjustment mechanisms according to the working requirement. The stepping trolley 10 adopts an alternating current variable frequency motor, the variable frequency speed regulation is realized by arranging the roller on the track 2 to advance, the stepping trolley 10 and the track 2 realize advancing through a turbine and a worm, or other transmission mechanisms are adopted according to the working requirement. The stepping trolley 10 is provided with high-quality polyurethane or metal rollers, and the machine runs stably. The step dolly 10 is provided with an automatic travel system which can adjust the electromagnetic energy processing time according to the speed of the step dolly 10: 5 mm/s-30 mm/s.
In the embodiment, the rail 2 can adapt to workpieces with different diameters by adjusting the rail tool (flexibility), and the rail tool is adjusted to be selected from the prior art according to the working requirement; and a limit hole suitable for the stepping trolley 10 is formed on the track 2 and used for the stepping trolley 10 to advance.
In the actual field, the cylinder weldment 3 is firstly wound on a circle of track 2, a stepping trolley 10 is placed on the track 2, an electromagnetic energy destressing device 12 is placed on a fixing plate 7 on the stepping trolley 10, and a spacing adjusting mechanism 9 on the stepping trolley 10 is adjusted, so that the electromagnetic energy destressing device 12 is located just above the welding seam 1. Placing an electromagnetic energy destressing device 12 on the fixing plate 7, and connecting an induction heating magnetic head coil 5 with a 300-300 kHz medium-frequency induction power supply for preheating; meanwhile, the electromagnetic energy destressing magnetic head coil 4 is connected with a special controllable electromagnetic energy CEME power supply for stress relief; and finally, the stepping trolley 10 runs on the track 2 to remove residual stress.
The requirements for the device for removing the residual stress in the girth welding of the large thin-wall cylinder in the embodiment are as follows:
in this embodiment, the induction heating magnetic head, the local induction low-temperature preheating treatment of welding seam 1, induction heating magnetic head coil 5 connect 300 ~ 300kHz intermediate frequency induction power supply, reach more destressing effect, preheat 100 ~ 300 ℃.
In the embodiment, the electromagnetic energy stress relieving magnetic head coil 4 is connected with a special controllable electromagnetic energy CEME power supply, the electromagnetic energy stress is relieved, and the stress relieving rate is 30-70%.
In the embodiment, the adjusting range of the spacing adjusting mechanism 9 on the stepping trolley 10 is 10-100 mm, and the electromagnetic energy destressing device is suitable for adjusting the working distance between the electromagnetic energy destressing device 12 and the cylinder weldment 3.
In this embodiment, the step cart 10 has an automatic travel system that adjusts the electromagnetic energy processing time based on the speed of the step cart 10: 5 mm/s-30 mm/s.
In this embodiment, the step carriage 10 runs on the track 2, and runs in mesh with the track through a gear.
In this embodiment, the rail 2 is equipped with the adjustable rail frock (flexibility), adapts to the barrel weldment 3 of different diameters.
In the present embodiment, the cylindrical weldment 3 has a diameter of 10m and a wall thickness of 10 mm.
Example two
The embodiment is an improvement on the basis of the first embodiment, and the improvement is as follows:
as shown in fig. 4-8, the pipe matching device mainly comprises a supporting wheel 13, a hydraulic lifting platform 15 and a supporting frame 11; the support frame 11 is used for supporting the cylinder weldment 3, the support frame 11 is provided with a support wheel 13, and the support wheel 13 is in contact with the cylinder weldment 3. When the rotating motor 14 on the supporting frame 11 drives the supporting wheel 13 to rotate, the cylinder weldment 3 also rotates, and the electromagnetic energy destressing device 12 at the bottom processes the weld joint 1.
In the present embodiment, the electromagnetic energy destressing device 12 is mainly composed of an electromagnetic energy destressing head and an induction heating head; the electromagnetic energy stress-relieving magnetic head mainly comprises an electromagnetic energy stress-relieving magnetic head iron core 8 and an electromagnetic energy stress-relieving magnetic head coil 4, and the induction heating magnetic head mainly comprises an induction heating magnetic head iron core 6 and an induction heating magnetic head coil 5. The electromagnetic energy stress-removing magnetic head coil 4 is connected with a special controllable electromagnetic energy CEME power supply for stress removal; the induction heating magnetic head coil 5 is connected with a 300-300 kHz intermediate frequency induction power supply for preheating.
In this embodiment, the electromagnetic energy destressing device 12 is placed at the bottom of the barrel weldment 3, and the electromagnetic energy destressing device 12 is mounted on a hydraulic lift 15 at the bottom for adjusting the height distance between the electromagnetic energy destressing device 12 and the weld 1.
In this embodiment, a rotary motor 14 is attached to the support frame 11 to drive the support wheels 13 to rotate the barrel weldment 3.
In an actual field, firstly, the distance between the two support frames 11 is adjusted according to the size of the cylinder weldment 3, then the cylinder weldment 3 is placed on the support frames 11 to be in contact with the support wheels 13, the hydraulic lifting platform 15 is placed between the two support frames 11, the electromagnetic energy destressing device 12 is installed on the fixing plate 7 of the hydraulic lifting platform 15, the electromagnetic energy destressing device 12 is located right below the welding seam 1, and the hydraulic lifting platform 15 is adjusted to enable the electromagnetic energy destressing device 12 to be at a proper distance from the welding seam 1. The induction heating magnetic head coil 5 is connected with a 300-300 kHz intermediate frequency induction power supply for preheating; meanwhile, the electromagnetic energy stress-relief magnetic head coil 4 is connected with a special controllable electromagnetic energy CEME power supply for stress relief. Finally, the rotary motor 14 is turned on to drive the support wheel 13, so that the whole workpiece rotates, and the residual stress is eliminated.
The embodiment has the technical requirements for the device for removing the residual stress by girth welding of the large-sized thin-wall cylinder body:
the induction heating magnetic head, the local induction low temperature preheating of welding seam 1, induction heating magnetic head coil 5 connect 300 ~ 300kHz intermediate frequency induction power, reach more destressing effect, preheating temperature 100 ~ 300 ℃.
The electromagnetic energy stress relieving magnetic head is characterized in that an electromagnetic energy stress relieving magnetic head coil 4 is connected with a special controllable electromagnetic energy CEME power supply, the electromagnetic energy stress is relieved, and the stress relieving rate is 30-70%.
The hydraulic lifting platform 15 is to be over against the welding seam 1 when the electromagnetic energy destressing and induction heating, and the working distance can be adjusted through the hydraulic lifting platform 15, and the adjusting range is 10-300 mm.
The supporting frame 11 is suitable for supporting and rotating circular ring welding workpieces such as rotating workpieces, pressure vessels, pipelines and the like, and the embodiment is described with respect to the cylinder weldment 3, the cylinder weldment 3 is arranged on the driving supporting wheel and the driven supporting wheel, and the welding seam 1 of the cylinder weldment 3 is arranged between the driving supporting wheel and the driven supporting wheel. The initiative supporting wheel passes through rotating electrical machines 14 rotations, and it is rotatory to drive barrel weldment 3, adjusts electromagnetic energy ageing treatment time, the efficiency that electromagnetic energy handled through control rotation speed: 5 mm/s-30 mm/s.
The supporting wheel 13 adopts high-quality polyurethane or metal roller wheels, so that the machine operates stably, and the inclination angle of the roller wheels can be adjusted to adapt to cylinder weldments 3 with different diameters.
The diameter of the cylinder weldment 3 is 10m, and the wall thickness is 10 mm.
EXAMPLE III
This example is further detailed with the SA508-4 steel residual stress removal process.
Two pieces of SA508-4 steel were welded together, and the welded portions were subjected to electromagnetic energy removal of residual stress. Arranging an induction heating magnetic head and an electromagnetic energy stress-removing magnetic head in a row and moving at the speed of 10mm/s, wherein the distance between the magnetic head and a welding part is 10mm, the magnetic head processes the welding part of SA508-4 steel, and a special power supply for controllable electromagnetic energy CEME is set to be 20% of duty ratio, 20Hz of frequency and 100A of peak current; the induction heating magnetic head is heated by a 100kHz intermediate frequency induction power supply.
And detecting the residual stress by adopting a drilling strain method, sticking strain patterns on the center and the edge of the welding part, drilling holes on the strain patterns, measuring the strain released on the surface of the welding part, and substituting the measured strain into a formula to calculate the residual stress of the part where the removed material is positioned.
Electromagnetic energy acts on the SA508-4 steel in a magnetocaloric coupling mode, so that the atoms at the welding position vibrate more intensely, the atoms are promoted to be in a low energy state, and the residual stress is reduced or eliminated; the residual stress is removed by adopting an electromagnetic energy mode, and the advantages of no contact, no pollution and the like can be realized. Polishing the welding position of the SA508-4 steel, sticking strain patterns on the center and the edge of the welding, perforating the center of the strain patterns in a direction perpendicular to the welding direction to release residual stress, and treating the welding position of the SA508-4 steel by using an electromagnetic energy destressing magnetic head; under the combined action of thermal and electromagnetic energy, the reduction range of the residual stress in the X direction is 69.0 percent at most, the average value is 54.3 percent, the reduction range of the residual stress in the Y direction is 47.8 percent at most, and the average value is 41.6 percent. It is proved that the residual stress of the welding position after being treated by the electromagnetic energy mode is greatly reduced.
Example four
This embodiment is further described in detail with the process of removing residual stress by welding Q690 high strength steel.
The material used in the test is Q690 high-strength steel with the specification of 300mm multiplied by 80mm multiplied by 10mm, a milling machine is used for milling a 300mm multiplied by 6mm multiplied by 4mm U-shaped groove in the center of the steel plate, and the welding is carried out by adopting consumable electrode argon arc surfacing. The residual stress is measured by using a drilling strain method, as shown in fig. 9, 12 points are taken from a Q690 high-strength steel plate for a comparison test, a special power supply for controllable electromagnetic energy CEME is set to be 10Hz, the peak current is 25A, the processing time is 30s, the distance between a magnetic head and the steel plate is 5mm, the magnetic induction intensity reaches 1.3T, and the test only adopts the electromagnetic energy stress removing magnetic head and does not adopt the composite action of electromagnetic energy and heat energy.
The method for removing the residual stress by adopting the electromagnetic energy is a convenient, quick and simple method for removing the residual stress. Under certain magnetic field intensity, the atoms in the Q690 steel plate can be promoted to migrate, so that the atoms move to a more stable low-energy state, and the residual stress is reduced or removed. It can be clearly seen in table 1 that the residual stress of the electromagnetic energy treated Q690 high strength steel is significantly reduced, and when the magnetic head is 5mm away from the test point, the maximum reduction range in the X-axis direction is 69.75%, the average value is 55.21%, the maximum reduction range in the Y-axis direction is 57.45%, and the average value is 42.43%. The fact proves that the residual stress of the steel plate after being treated by the electromagnetic energy is greatly reduced, and the good mechanical property of the workpiece is kept to the maximum extent.
TABLE 1 data table of experimental results of example four
The principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (9)
1. The utility model provides a be used for large-scale thin wall barrel girth welding to get rid of residual stress device which characterized in that: the electromagnetic energy stress relieving device comprises an electromagnetic energy stress relieving device and a pipeline matching device, wherein the pipeline matching device can support a cylinder weldment or support the cylinder weldment on the cylinder weldment, the electromagnetic energy stress relieving device can process a welding seam of the cylinder weldment under the combined action of electromagnetic energy and heat energy, and the electromagnetic energy stress relieving device comprises an induction heating magnetic head and an electromagnetic energy stress relieving magnetic head.
2. The device for removing residual stress of large-scale thin-walled cylinder girth welding according to claim 1, characterized in that: the pipeline matching device comprises a track and a stepping trolley, the track surrounds the cylinder weldment and is arranged close to the welding line, the stepping trolley can perform circular motion on the track, and the electromagnetic energy destressing device is installed on the stepping trolley.
3. The device for removing residual stress of large-scale thin-walled cylinder girth welding according to claim 2, characterized in that: the stepping trolley is provided with a fixed plate through a spacing adjusting mechanism, the electromagnetic energy destressing device is arranged on the fixed plate, and the spacing adjusting mechanism can adjust the height distance and the left-right deviation between the electromagnetic energy destressing device and the welding line.
4. The device for removing residual stress of large-scale thin-walled cylinder girth welding according to claim 2, characterized in that: the track is equipped with flexible adjustment track frock, can set up spacing hole on the track.
5. The device for removing residual stress of large-scale thin-walled cylinder girth welding according to claim 1, characterized in that: the pipeline matching device comprises a supporting wheel, a hydraulic lifting table and a supporting frame, the supporting frame can support the barrel weldment, the supporting wheel is mounted on the supporting frame and is in contact with the barrel weldment, and the electromagnetic energy destressing device is mounted on the hydraulic lifting table;
the supporting wheel is connected with a rotating motor, and the rotating motor drives the supporting wheel to rotate.
6. The device for removing residual stress of large-scale thin-walled cylinder girth welding according to claim 5, wherein: the top of the hydraulic lifting platform is provided with a fixed plate, and the electromagnetic energy destressing device is arranged on the fixed plate.
7. The device for removing residual stress of large-scale thin-walled cylinder girth welding according to claim 1, characterized in that: the induction heating magnetic head comprises an induction heating magnetic head iron core and an induction heating magnetic head coil, wherein the induction heating magnetic head coil surrounds the induction heating magnetic head iron core, and the induction heating magnetic head coil can be connected with a 300-300 kHz intermediate frequency induction power supply to preheat.
8. The device for removing residual stress of large-scale thin-walled cylinder girth welding according to claim 7, wherein: the electromagnetic energy stress relieving magnetic head comprises an electromagnetic energy stress relieving magnetic head iron core and an electromagnetic energy stress relieving magnetic head coil, wherein the electromagnetic energy stress relieving magnetic head coil is arranged around the electromagnetic energy stress relieving magnetic head iron core, and the electromagnetic energy stress relieving magnetic head coil can be connected with a controllable electromagnetic energy CEME special power supply for stress relief.
9. The device for removing residual stress of large-scale thin-walled cylinder girth welding according to claim 1, characterized in that: the diameter of the cylinder weldment is 10m, and the wall thickness is 10 mm.
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