CN114737045B - Weld bead residual stress eliminating device and method - Google Patents
Weld bead residual stress eliminating device and method Download PDFInfo
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- CN114737045B CN114737045B CN202210370425.6A CN202210370425A CN114737045B CN 114737045 B CN114737045 B CN 114737045B CN 202210370425 A CN202210370425 A CN 202210370425A CN 114737045 B CN114737045 B CN 114737045B
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- 239000011324 bead Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000008093 supporting effect Effects 0.000 claims abstract description 45
- 230000008030 elimination Effects 0.000 claims abstract description 12
- 238000003379 elimination reaction Methods 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000010410 layer Substances 0.000 description 20
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004021 metal welding Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Crystallography & Structural Chemistry (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention belongs to the technical field of weld bead residual stress elimination, in particular to a weld bead residual stress elimination device and a weld bead residual stress elimination method, wherein the weld bead residual stress elimination device comprises a base, a telescopic rod, a bearing rotating shaft and an ultrasonic device, wherein the left side of the inside of the base is provided with a mounting groove, the upper left side of the mounting groove in the base is rotationally connected with a first roller, the lower left side of the mounting groove in the base is rotationally connected with a second roller, and the groove in the base is rotationally connected with an electromagnet; according to the invention, the second roller pushes the weldment to move upwards and prop against the upper side of the mounting groove under the action of the supporting spring, so that the base is not easy to swing up and down, and when the weldment is large, the second roller rotates, so that the base can move along the edge of the weldment to eliminate residual stress at other positions, and the problem that when an ultrasonic device in the prior art needs to be transferred, the magnetic seat is required to be powered off and demagnetized, then the carrying and the transferring can be carried out manually, so that the working efficiency is low.
Description
Technical Field
The invention belongs to the technical field of weld bead residual stress elimination, and particularly relates to a weld bead residual stress elimination device and method.
Background
In the welding process, stress and strain are generated in the weldment due to non-uniformity of joint structure and performance, the welding stress remained in the weldment after welding is welding residual stress, which is a defect which is almost unavoidable due to welding technology and is caused by no external load, in order to avoid the influence of residual stress on safe operation of a structure, the welding residual stress needs to be eliminated, the plasticity and toughness of a welding joint are improved, so that the structural performance of the weldment is improved, the welding bead residual stress is eliminated by ultrasonic waves in the prior art, the basic principle is that an impact tool is pushed by using high-power ultrasonic waves to impact the surface of a metal object at a frequency of more than twenty thousand times per second, the high-frequency, high-efficiency and focused energy of ultrasonic waves is utilized to enable the surface layer of the metal to generate larger compressive plastic deformation, meanwhile, the ultrasonic welding stress eliminating equipment wave changes the original stress field, a certain number of compressive stress is generated, the impacted part is enhanced, the fatigue strength of the metal welding joint and the structure is obviously improved, and the fatigue life of the metal welding joint is greatly prolonged.
In the prior art, a technical scheme of a device and a method for eliminating residual stress of a welding bead appears, for example, a chinese patent with the application number CN201910675347.9 discloses a device and a method for eliminating residual stress of a welding bead, which comprises a magnetic seat, a mechanical arm and an ultrasonic impact head, wherein the ultrasonic impact head is hinged at a first end of the mechanical arm, a second end of the mechanical arm is hinged on the magnetic seat, an axis of the ultrasonic impact head is perpendicular to a hinged shaft of the ultrasonic impact head and the mechanical arm, the magnetic seat is fixed near a workpiece to be repaired, then the positions of the mechanical arm and the ultrasonic impact head are adjusted, the head of the ultrasonic impact head is aligned with the welding bead surface of the workpiece, then the mechanical arm and the ultrasonic impact head are fixed, the ultrasonic impact head is kept in the pose, residual stress is eliminated by opening the ultrasonic impact head, compared with the traditional operation, the traditional operation is not required, the labor intensity is small, the effect of eliminating residual stress is improved, the situation that hand shake is unstable when the ultrasonic impact head is eliminated by manual holding, and the manual labor intensity is reduced, but the magnetic force is still has a part, the defect that the magnetic force is required to be transferred, and the welding platform is required to be transferred, but the welding platform is required to be removed, and the welding device is required to be transferred, and the welding platform is required to be transferred, and the welding device is required to be removed.
In view of the above, the present invention provides a weld bead residual stress relieving device and method to solve the above-mentioned technical problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the welding bead residual stress eliminating device and method solve the problems that the prior device is adsorbed on a welding piece through a magnetic seat, and the magnetic seat is required to be powered off and demagnetized before being transferred during transfer, so that the transfer process is complicated, the production efficiency is reduced, and the magnetic seat is only suitable for a plurality of flat platforms, so that the application range is small.
The technical scheme adopted for solving the technical problems is as follows: a method of weld bead residual stress relief, the method comprising the steps of:
s1: after the welding of the weldment is finished, the weldment is placed on a making platform, the base is inserted into the weldment through the oblique angle at the left side of the first roller and the second roller, then the weldment is pushed to move upwards to the upper surface of the mounting groove under the supporting action of the second roller at the lower side, the base is primarily clamped on the weldment, and the base is prevented from swinging up and down;
s2: the electromagnet is electrified and attracts the weldment, so that the support plate is in further tight contact with the weldment, the stability of the base on the weldment is improved, the base is prevented from moving forwards and backwards, then the telescopic rod is adjusted, the front end of the ultrasonic device is contacted with a welding bead on the inner side of the weldment through a bearing rotating shaft on the upper end of the telescopic rod, then the telescopic rod and the bearing rotating shaft are fixed through bolts, the ultrasonic device is fixed, and residual stress is eliminated through electrifying operation;
s3: the second roller drives the motor to start running, and the base can move along the weldment with the assistance of the balls and the first roller, so that the residual stress elimination of different positions on the weldment with a larger size is realized;
S4: when unsuitable base presss from both sides tightly on the weldment, can place the base on work platform, then rotate the electro-magnet for supporting wheel and platform contact, the electro-magnet passes through wire rope and drives bevel gear rotation simultaneously, thereby drive the drive shaft and rotate, make the second gyro wheel rotate downwards and the platform contact, the electro-magnet drives the supporting wheel simultaneously, and keep on same straight line with the lower extreme of second gyro wheel under the rubber layer effect, then remove through second gyro wheel and supporting wheel, realize can driving ultrasonic device and remove the welding bead residual stress of accomplishing on the weldment and eliminate.
The utility model provides a weld bead residual stress relief device, residual stress relief device is applicable to foretell weld bead residual stress relief method, residual stress relief device includes base, telescopic link, bearing pivot and ultrasonic device, the lower extreme of telescopic link passes through the intermediate position of bolt swivelling joint in the base upper end, the inside outside fixed connection with the bearing pivot of upper end of telescopic link, the outside of ultrasonic device and the inboard fixed connection of bearing pivot, the mounting groove has been seted up in the inside left side of base, the inside mounting groove upper left side swivelling joint of base has first gyro wheel, the outside frame and the top sliding connection of base of first gyro wheel, the outside frame upper end fixedly connected with reset spring of first gyro wheel, the inside upper and lower both sides of mounting groove and the right side fixedly connected with backup pad at first gyro wheel, the inside left side swivelling joint of backup pad has the ball, the ball is along the surface evenly distributed of backup pad, the inside mounting groove lower left side swivelling joint has the second gyro wheel, the outside frame lower extreme fixedly connected with drive shaft of second gyro wheel, the inside frame lower extreme fixedly connected with annular groove, the inside of base has the rigidity, the inside of base has the recess is connected with the inside the drive spring, the inside of base has the recess is connected with the rigidity, the inside of base has the recess, the inside is connected with the rigidity.
When in operation, firstly, a weldment waiting for eliminating residual stress of a welding bead is placed on a working platform, the surface of the weldment is wiped clean, then one side of the weldment is inserted into the inner side of a base, so that the weldment pushes a first roller to move upwards and a second roller to move downwards, then the base is primarily clamped on the weldment under the action of a return spring and a supporting spring, because the hardness of the supporting spring is higher than that of the return spring, the return spring is easier to compress, the second roller pushes the weldment to move upwards and prop against the upper side of a mounting groove under the action of the supporting spring, meanwhile, the right end of the weldment props against a ball, so that the base is not easy to swing upwards and downwards, then an electromagnet is electrified, so that the electromagnet attracts the weldment to be in close contact with the ball through a gap between the supporting plates, and under the action of friction force between the first roller and the second roller, the base is not easy to slide back and forth, then the telescopic rod is adjusted, the front end impact head of the ultrasonic device is contacted with the welding bead by utilizing the bearing rotating shaft, then the ultrasonic device is started to impact the welding bead, so that the internal residual stress is eliminated, when a weldment is large, the driving motor is started to drive the second roller to rotate, the balls can reduce the friction force between the weldment and the supporting plate, the base can move along the edge of the weldment, meanwhile, the electromagnet always attracts the edge of the weldment to be attached to the balls, so that the guiding effect is provided for the movement of the base, deviation can not occur when the base moves, then the residual stress of other positions of the weldment is eliminated by the ultrasonic device, the shaking condition easily caused when the ultrasonic device is manually held is avoided, and the ultrasonic device in the prior art is prevented from being required to be transferred, the magnetic seat must be powered off and demagnetized firstly, then the carrying and transferring can be carried out manually, so that the working efficiency is low, and the repositioning and calibration are required after the carrying, so that the front end impact head of the ultrasonic device is ensured to be contacted with the welding bead, and the manual labor intensity is increased.
Preferably, the left sides of the first roller and the second roller are provided with oblique angles of 25-70 degrees.
When the welding piece edge is inserted into the inner side of the base, the left sides of the first roller and the second roller are respectively provided with an oblique angle of 25-70 degrees, so that when the base is installed on the welding piece edge, the resistance is smaller when the welding piece is inserted, the installation efficiency of the base is improved, the first roller and the second roller are prevented from being damaged due to the fact that the inserting speed is higher when the welding piece is inserted, impact force generated when the welding piece is inserted is reduced through the oblique angles, and the inner elements of the base are protected.
Preferably, a rubber layer is arranged on the right side of the electromagnet, an adjusting groove is formed in the inner side of the rubber layer, and a supporting wheel is rotatably connected in the adjusting groove.
During operation, when the weldment edge is unsuitable for pressing from both sides tightly, this moment can be through rotating the electro-magnet, make the electro-magnet drive supporting wheel and work platform contact, then the electro-magnet circular telegram produces the appeal to work platform, make the base by adsorbing on work platform, simultaneously the electro-magnet rotates and opens the back, can increase the area of contact of base and work platform, thereby the stability of base has been improved, when the electro-magnet circular telegram produces the appeal to work platform simultaneously, and when rubber layer and regulating tank effect on the electro-magnet right side, the supporting wheel can extrude the rubber layer of different positions, then the different deformation of appearance adapts to uneven work platform, guarantee simultaneously that the lower extreme of part supporting wheel can keep on same straight line with the lower extreme of left second gyro wheel, make things convenient for the subsequent removal of base to carry out residual stress elimination to the different positions on the welding bead, thereby the accommodation of equipment has been improved.
Preferably, the lower right corner of the base is provided with a lug, and the lower side edge of the right side rubber layer of the electromagnet can be attached to the right end side wall of the lug when rotating.
When the electromagnet is rotated during operation, the rubber layer at the lower end of the electromagnet and the lug at the right lower corner of the base generate extrusion force, so that the rubber layer of the electromagnet can be in close contact with the lug, the stability of the electromagnet is improved, the electromagnet cannot easily rotate, and meanwhile, the lug can provide a guiding effect when the electromagnet rotates, so that the supporting wheel can be kept on the same straight line with the lower end of the first roller.
Preferably, steel wire ropes are fixedly connected to the lower sides of the front side and the rear side of the electromagnet, the steel wire ropes are symmetrically arranged, bevel gears are rotatably connected to the left ends of the two steel wire ropes below the mounting groove on the left side of the base 1, and the outer sides of the two bevel gears are meshed and connected with the right ends of corresponding driving shafts.
During operation, can drive bevel gear through wire rope during the rotation and rotate, because the outside of bevel gear is connected with the right-hand member meshing of drive shaft, so bevel gear can drive the drive shaft and rotate, thereby the drive shaft drives the second gyro wheel rotate downwards with work platform contact, through bevel gear rotation connection, can guarantee drive shaft pivoted stability, avoid causing the condition that the skew appears in the second gyro wheel after long-term manual rotation, lead to the bottom of second gyro wheel unable and the supporting wheel to be in on the same straight line, the maintenance cost of follow-up drive shaft has been increased, wire rope rigidity big elasticity is little simultaneously, can avoid the bevel gear to appear the condition of autogenous rotation.
The beneficial effects of the invention are as follows:
1. According to the weld bead residual stress eliminating device and method, the hardness of the supporting spring is larger than that of the restoring spring, so that the restoring spring is easier to compress, the second roller pushes the welding piece to move upwards and prop against the upper side of the mounting groove under the action of the supporting spring, the base is not easy to swing up and down, then the ultrasonic device impacts the weld bead to eliminate internal residual stress, when the welding piece is larger, the second roller is driven by the driving motor to rotate, the base can eliminate residual stress at other positions by means of the movement of the balls along the edge of the welding piece, the situation that in the prior art, the magnetic seat is required to be powered off and demagnetized firstly, and then the device can be carried and transferred is avoided.
2. According to the weld bead residual stress eliminating device and method, when the edge of a welding piece is not suitable for clamping, the electromagnet is electrified to generate attractive force on the working platform, so that the base is adsorbed on the working platform, meanwhile, the electromagnet increases the contact area between the base and the working platform, the stability of the base is improved, meanwhile, under the action of the rubber layer on the right side of the electromagnet and the regulating groove, the supporting wheel can squeeze the rubber layer to generate different deformations so as to adapt to the uneven working platform, and the lower end of part of the supporting wheel and the lower end of the second roller on the left side can be kept on the same straight line, so that the base can conveniently move to eliminate residual stress on different positions of the weld bead.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method for eliminating residual stress of a weld bead according to the present invention;
FIG. 2 is a perspective view of the structure of the present invention;
FIG. 3 is a schematic side view of the structure of the present invention;
FIG. 4 is a schematic elevational view of the structure of the present invention;
FIG. 5 is a cross-sectional view taken along the direction A-A in FIG. 4;
Fig. 6 is a partial enlarged view at B in fig. 5.
In the figure: 1. a base; 11. a mounting groove; 2. a telescopic rod; 21. a bearing shaft; 3. an ultrasonic device; 4. a first roller; 41. a return spring; 5. a support plate; 51. a ball; 6. a second roller; 61. a drive shaft; 62. a connecting groove; 63. a support spring; 64. a driving motor; 7. an electromagnet; 71. an adjustment tank; 72. a support wheel; 73. a wire rope; 74. bevel gears.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 6, a weld bead residual stress relieving method includes the steps of:
S1: after the welding of the weldment is finished, the weldment is placed on a making platform, firstly, the base 1 is inserted into the weldment through the oblique angle at the left side of the first roller 4 and the second roller 6, then under the supporting action of the second roller 6 at the lower side, the weldment is pushed to move upwards to be abutted against the upper surface of the mounting groove 11, and the base 1 is primarily clamped on the weldment, so that the base 1 is prevented from swinging up and down;
s2: the electromagnet 7 is electrified and attracts the weldment, so that the supporting plate 5 is in further tight contact with the weldment, the stability of the base 1 on the weldment is improved, the base 1 is prevented from moving forwards and backwards, then the telescopic rod 2 is adjusted, the front end of the ultrasonic device 3 is contacted with a welding bead on the inner side of the weldment through the bearing rotating shaft 21 at the upper end of the telescopic rod 2, then the telescopic rod 2 and the bearing rotating shaft 21 are fixed through bolts, the ultrasonic device 3 is fixed, and residual stress is eliminated through electrifying operation;
S3: the driving motor 64 in the second roller 6 starts to run, and the base 1 can move along the weldment with the aid of the balls 51 and the first roller 4, so that the residual stress elimination of different positions on the weldment with a larger size is realized;
s4: when the welding piece is not suitable for clamping the base 1, the base 1 can be placed on a working platform, then the electromagnet 7 is rotated to enable the supporting wheel 71 to be in contact with the platform, meanwhile, the electromagnet 7 drives the bevel gear 74 to rotate through the steel wire rope 73, so that the driving shaft 61 is driven to rotate, the second roller 6 is enabled to rotate downwards to be in contact with the platform, meanwhile, the electromagnet 7 drives the supporting wheel 72 and keeps on the same straight line with the lower end of the second roller 6 under the action of the rubber layer, then the welding piece moves through the second roller 6 and the supporting wheel 72, and the effect that the welding bead residual stress on the welding piece can be eliminated by driving the ultrasonic device 3 to move is achieved.
The utility model provides a weld bead residual stress relief device, residual stress relief device is applicable to the weld bead residual stress relief method in claim 1, residual stress relief device includes base 1, telescopic link 2, bearing pivot 21 and ultrasonic device 3, the lower extreme of telescopic link 2 passes through the intermediate position of bolt swivelling joint in base 1 upper end, the inside outside fixed connection with bearing pivot 21 of upper end of telescopic link 2, the outside of ultrasonic device 3 and the inboard fixed connection of bearing pivot 21, mounting groove 11 has been seted up on the inside left side of base 1, the inside mounting groove 11 upper left side of base 1 rotates and is connected with first gyro wheel 4, the outside frame of first gyro wheel 4 and the top sliding connection of base 1, the outside frame upper end fixedly connected with reset spring 41 of first gyro wheel 4, the inside upper and lower both sides of mounting groove 11 just are at the right side fixedly connected with backup pad 5 of first gyro wheel 4, the inside left side swivelling joint ball 51 of backup pad 5, ball 51 evenly distributes along the surface of backup pad 5, the inside mounting groove 11 inside is rotated and is connected with first gyro wheel 4, the inside frame of base 1 has a recess 6, the inside is connected with the second gyro wheel 6, the inside is connected with the inside of base 6 has a recess of recess 61, the inside of base 1 has a recess 61 is connected with the inside of a recess 61, the inside of base 1 has a recess 61 is connected with the inside of recess 61, the inside of recess is connected with the inside of base 1, the recess is connected with the inside of recess 61, the inside of rigidity is connected with the inside recess of base 1, the recess is connected with the inside recess of rigidity 1.
When in operation, firstly, a weldment waiting for eliminating residual stress of a welding bead is placed on a working platform, the surface of the weldment is wiped clean, then one side of the weldment is inserted into the inner side of a base 1, so that the weldment pushes a first roller 4 to move upwards and a second roller 6 to move downwards, then the base 1 is primarily clamped on the weldment under the action of a return spring 41 and a supporting spring 63, the return spring 41 is easier to compress because the hardness of the supporting spring 63 is higher than that of the return spring 41, the second roller 6 pushes the weldment to move upwards and abut against the upper side of a mounting groove 11 under the action of the supporting spring 63, the right end of the weldment abuts against a ball 51, the base 1 is not easy to swing upwards and downwards, then an electromagnet 7 is electrified, so that the electromagnet 7 attracts the weldment to be in close contact with the ball 51 through a gap between the supporting plates 5, under the action of friction force between the first roller 4 and the second roller 6, the base 1 is not easy to slide forwards and backwards, then the front end impact head of the ultrasonic device 3 is contacted with the welding bead by adjusting the telescopic rod 2 and utilizing the bearing rotating shaft 21, then the ultrasonic device 3 is started to impact the welding path, so that the internal residual stress is eliminated, when a weldment is large, the driving motor 64 is started, the driving motor 64 drives the second roller 6 to rotate, and the balls 51 can reduce friction force between the weldment and the supporting plate 5, so that the weldment can move along the groove in the base 1, the electromagnet 7 always attracts the edge of the weldment to be attached to the balls 51, so that a guiding effect is provided for movement of the base 1, deviation does not occur when the base 1 moves, then the ultrasonic device 3 eliminates residual stress at other positions of the weldment, the condition that rocks easily appears when having avoided artifical handheld ultrasonic device 3 to and when avoiding appearing current ultrasonic device 3 to need transferring, must carry out outage demagnetization to the magnetic seat earlier, then personnel just can carry to shift and cause work efficiency lower, and need repositioning calibration after the transport, increased artificial intensity of labour's condition.
As an embodiment of the present invention, the left sides of the first roller 4 and the second roller 6 are provided with an oblique angle of 25 to 70 degrees.
When the welding piece edge is inserted into the inner side of the base 1 in operation, because the left sides of the first roller 4 and the second roller 6 are respectively provided with an oblique angle of 25-70 degrees, when the base 1 is installed on the welding piece edge, the resistance of the welding piece in insertion is smaller, the installation efficiency of the base 1 is improved, the first roller 4 and the second roller 6 are prevented from being damaged due to the fact that the insertion speed is higher in the welding piece insertion process, the impact force generated in the welding piece insertion process is reduced through the oblique angles, and the internal elements of the base 1 are protected.
As an embodiment of the present invention, a rubber layer is disposed on the right side of the electromagnet 7, an adjusting groove 71 is disposed on the inner side of the rubber layer, and a supporting wheel 72 is rotatably connected to the inside of the adjusting groove 71.
When the welding piece edge is not suitable for clamping, can rotate electromagnet 7 this moment for electromagnet 7 drives supporting wheel 72 and work platform contact, then electromagnet 7 circular telegram produces the appeal to work platform, make base 1 by adsorbing on work platform, after the electromagnet 72 rotates simultaneously and opens, can increase the area of contact of base 1 and work platform, the random removal of base 1 has been prevented and rock around, when electromagnet 7 circular telegram produces the appeal to work platform simultaneously, and under the rubber layer on electromagnet 7 right side and regulating groove 71 effect, supporting wheel 72 can extrude the rubber layer in different positions, then appear different deformation and adapt to uneven work platform, guarantee simultaneously that the lower extreme of partial supporting wheel 72 can keep on same straight line with the lower extreme of left second gyro wheel 6, make things convenient for base 1 to remove and carry out residual stress elimination to the different positions on the welding bead, thereby the accommodation of equipment has been improved.
As an embodiment of the present invention, a bump is provided at the lower right corner of the base 1, and the lower edge of the right rubber layer of the electromagnet 7 may be attached to the right side wall of the bump when rotating.
When the electromagnet 7 is rotated during operation, the rubber layer at the lower end of the electromagnet 7 and the lug at the right lower corner of the base 1 generate extrusion force, so that the rubber layer of the electromagnet 7 can be in close contact with the lug, the stability of the electromagnet 7 is improved, the electromagnet 7 cannot easily rotate, the electromagnet 7 is attached to the lug after rotating, and the lug plays a role in guiding and limiting the electromagnet 7.
As an embodiment of the present invention, steel wire ropes 73 are fixedly connected below the front and rear sides of the electromagnet 7, the steel wire ropes 73 are symmetrically arranged, the left ends of the two steel wire ropes 73 are rotatably connected below the left mounting groove 11 of the base 1, and the outer sides of the two bevel gears 74 are engaged with the right ends of the corresponding driving shafts 71.
During operation, the electromagnet 7 can drive the bevel gear 74 to rotate through the steel wire rope 73 during rotation, because the outer side of the bevel gear 74 is meshed with the right end of the driving shaft 71, the bevel gear 74 can drive the driving shaft 61 to rotate, thereby the driving shaft 61 drives the second roller 6 to rotate downwards to be in contact with a working platform, the base 1 is guaranteed to move on the working platform, the rotating stability of the driving shaft 61 can be guaranteed through the rotating connection of the bevel gear 74, the condition that the second roller 6 is deviated after long-term manual rotation is avoided, the bottom end of the second roller 6 cannot be in the same straight line with the supporting wheel 72, the maintenance cost of the subsequent driving shaft 61 is increased, meanwhile, the steel wire rope 73 has high rigidity and high elasticity, and the condition that the bevel gear 74 rotates automatically can be avoided.
The specific working procedure is as follows:
By placing the weldment waiting for the relief of the residual stress of the weld bead on the work platform, then inserting one side of the weldment into the inside of the base 1 so that the weldment pushes the first roller 4 upward and the second roller 6 downward, then initially clamping the base 1 on the weldment under the action of the return spring 41 and the support spring 63, since the hardness of the support spring 63 is greater than that of the return spring 41, the return spring 41 is more easily compressed, so that the second roller 6 pushes the weldment upward under the action of the support spring 63 and against the upper side of the mounting groove 11 so that the upward and downward swing of the base 1 does not easily occur, then energizing the electromagnet 7 so that the electromagnet 7 attracts the weldment into close contact with the balls 51 through the gap between the support plates 5, under the action of friction force between the first roller 4 and the second roller 6, the base 1 is not easy to slide forwards and backwards, then the front end impact head of the ultrasonic device 3 is contacted with a welding bead by adjusting the telescopic rod 2, the ultrasonic device 3 is started to impact a welding path to eliminate internal residual stress, when a weldment is large, the driving motor 64 is started, so that the driving motor 64 drives the second roller 6 to rotate, the base 1 moves along the edge of the weldment by virtue of the balls 51, and meanwhile, the electromagnet 7 always attracts the edge of the weldment to be attached to the balls 51, so that a guiding effect is provided for movement of the base 1, and the base 1 is enabled to move to drive the ultrasonic device 3 to eliminate residual stress at other positions of the weldment; if weldment edge is not fit for pressing from both sides tightly, can pass through rotating electromagnet 7 this moment, then electromagnet 7 circular telegram is adsorbed base 1 on work platform, simultaneously under the rubber layer on electromagnet 7 right side and adjustment tank 71 effect, supporting wheel 72 can extrude the rubber layer of different positions, then appear different deformation and adapt to uneven work platform, guarantee simultaneously that the lower extreme of partial supporting wheel 72 can keep on same straight line with the lower extreme of left second gyro wheel 6, make things convenient for second gyro wheel 6 to drive base 1 follow-up removal to carry out residual stress elimination to the different positions on the welding bead, when having avoided among the prior art ultrasonic device 3 to need transfer, must carry out outage demagnetization to the magnetic force seat earlier, then personnel just can carry and shift, cause work efficiency lower.
The front, rear, left, right, up and down are all based on fig. 1 in the drawings of the specification, the face of the device facing the observer is defined as front, the left side of the observer is defined as left, and so on, according to the viewing angle of the person.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A weld bead residual stress relieving device is characterized in that: including base (1), telescopic link (2), bearing pivot (21) and ultrasonic device (3), the lower extreme of telescopic link (2) passes through the intermediate position of bolt swivelling joint in base (1) upper end, the inside outside fixed connection with bearing pivot (21) of upper end of telescopic link (2), the outside of ultrasonic device (3) and the inboard fixed connection of bearing pivot (21), mounting groove (11) have been seted up in the inside left side of base (1), the inside mounting groove (11) upper left side rotation of base (1) is connected with first gyro wheel (4), the top sliding connection of the outside frame of first gyro wheel (4) and base (1), the outside frame upper end fixedly connected with reset spring (41) of first gyro wheel (4), the inside upper and lower both sides of mounting groove (11) just are at the right side fixedly connected with backup pad (5) of first gyro wheel (4), the inside left side rotation of backup pad (5) is connected with ball (51), the outside surface (5) along backup pad (5) evenly distributed's) upper left side rotation has first gyro wheel (4), the outside of second gyro wheel (6) is connected with outside frame (6), the two ends of the driving shaft (61) are rotationally connected with the inside of the base (1), annular connecting grooves (62) are formed in the two ends of the driving shaft (61), supporting springs (63) are slidably connected to the inner sides of the connecting grooves (62), the hardness of the supporting springs (63) is greater than that of the restoring springs (41), driving motors (64) are arranged on the outer sides of the second rollers (6), grooves are formed in the right side of the base (1), and electromagnets (7) are rotationally connected to the grooves in the base (1); the left sides of the first roller (4) and the second roller (6) are provided with oblique angles of 25-70 degrees;
A rubber layer is arranged on the right side of the electromagnet (7), an adjusting groove (71) is formed in the inner side of the rubber layer, and a supporting wheel (72) is rotatably connected in the adjusting groove (71);
The front side and the rear side of the electromagnet (7) are fixedly connected with steel wire ropes (73), the steel wire ropes (73) are symmetrically arranged, the left ends of the two steel wire ropes (73) are rotatably connected with bevel gears (74) below the left side mounting groove (11) of the base (1), and the outer sides of the two bevel gears (74) are meshed with the right ends of the corresponding driving shafts (61).
2. A weld bead residual stress relieving device according to claim 1, wherein: the lower right corner of base (1) is provided with the lug, the downside edge on electro-magnet (7) right side rubber layer can laminate with the right-hand member lateral wall of lug when rotating.
3. A weld bead residual stress eliminating method is characterized in that: the method using the weld bead residual stress relieving apparatus according to any one of claims 1 to 2, the method comprising the steps of:
S1: after the welding of the weldment is finished, the weldment is placed on a making platform, firstly, the base (1) is inserted into the weldment through the oblique angles at the left sides of the first roller (4) and the second roller (6), then the weldment is pushed to move upwards to the upper surface of the mounting groove (11) under the supporting action of the second roller (6) at the lower side, and the base (1) is primarily clamped on the weldment, so that the base (1) is prevented from swinging up and down;
S2: the electromagnet (7) is electrified and attracts the weldment, so that the supporting plate (5) is in further tight contact with the weldment, the stability of the base (1) on the weldment is improved, the base (1) is prevented from moving forwards and backwards, then the telescopic rod (2) is adjusted, the front end of the ultrasonic device (3) is in contact with a welding bead on the inner side of the weldment through the bearing rotating shaft (21) at the upper end of the telescopic rod (2), then the telescopic rod (2) and the bearing rotating shaft (21) are fixed through bolts, the ultrasonic device (3) is fixed, and residual stress is eliminated through electrifying operation;
S3: the driving motor (64) in the second roller (6) starts to operate, and the base (1) can move along the weldment with the aid of the balls (51) and the first roller (4), so that the residual stress elimination of different positions on the weldment with a larger size is met;
S4: when unsuitable base (1) presss from both sides tightly on the weldment, can place base (1) on work platform, then rotate electro-magnet (7) for supporting wheel (72) and platform contact, simultaneously electro-magnet (7) drive bevel gear (74) through wire rope (73) and rotate, thereby drive shaft (61) and rotate, make second gyro wheel (6) rotate downwards and platform contact, simultaneously electro-magnet (7) drive supporting wheel (72), and keep on same straight line with the lower extreme of second gyro wheel (6) under the rubber layer effect, then remove through second gyro wheel (6) and supporting wheel (72), realize can drive ultrasonic device (3) removal completion weld bead residual stress on the weldment and eliminate.
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| CN103952531A (en) * | 2014-05-12 | 2014-07-30 | 中国石油大学(华东) | Automatic ultrasonic impact device for circumferential weld |
| CN108754122A (en) * | 2018-06-27 | 2018-11-06 | 中国核工业华兴建设有限公司 | A kind of automatic ultrasonic impact elimination welding residual stress device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6338765B1 (en) * | 1998-09-03 | 2002-01-15 | Uit, L.L.C. | Ultrasonic impact methods for treatment of welded structures |
| CN109371225B (en) * | 2018-12-20 | 2023-12-22 | 江苏阳明船舶装备制造技术有限公司 | Be used for automatic ultrasonic impact to dispel welding residual stress machine |
| CN110273063A (en) * | 2019-07-25 | 2019-09-24 | 大唐锅炉压力容器检验中心有限公司 | A kind of welding bead residual stress cancellation element and method |
| CN209652385U (en) * | 2019-07-29 | 2019-11-19 | 西南石油大学 | A kind of girth joint ultrasonic impact device |
| CN110983026A (en) * | 2019-12-18 | 2020-04-10 | 汪时 | Welding bead residual stress relieving device and method |
| CN111690807A (en) * | 2020-07-31 | 2020-09-22 | 江苏阳明船舶装备制造技术有限公司 | Magnetic automatic ultrasonic impact welding residual stress eliminating machine |
| CN114058836B (en) * | 2021-10-16 | 2023-04-21 | 康硕(山西)低应力制造系统技术研究院有限公司 | Weld bead residual stress eliminating device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952531A (en) * | 2014-05-12 | 2014-07-30 | 中国石油大学(华东) | Automatic ultrasonic impact device for circumferential weld |
| CN108754122A (en) * | 2018-06-27 | 2018-11-06 | 中国核工业华兴建设有限公司 | A kind of automatic ultrasonic impact elimination welding residual stress device |
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