Steel drum shaft crack electromagnetic thermal repair equipment and residual stress elimination process

Abstract

The invention belongs to the technical field of drum shaft repairing, and particularly relates to steel drum shaft crack electromagnetic thermal repairing equipment and a residual stress eliminating process, the steel drum shaft crack electromagnetic thermal repairing equipment comprises a repairing device, the repairing device comprises a workbench, the top of the workbench is slidably connected with a moving frame, and vibration of a third arc-shaped plate can be transmitted to a drum shaft being subjected to thermal repairing; and therefore, the atomic crystal lattice in the barrel shaft material is slightly displaced and rearranged. In the electromagnetic thermal repair process, by combining the effect of heat, adjustment of the microstructure is more remarkable, atoms can be made to be in a more stable energy state, then the reel shaft can release internal stress, then airflow sprayed out of the air outlet can be guided by the flow guide grooves to dissipate outwards, and the effect of electromagnetic thermal repair is improved. At the moment, the sprayed gas can cool the lower arc surface of the drum shaft, so that the thermal deformation of the drum shaft in the circumferential direction is more uniform, and the risk of crack propagation or new crack generation in the repair process is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of cylindrical shaft repair, and in particular relates to electromagnetic heat repair equipment for cracks in steel cylindrical shafts and a residual stress elimination process. Background Art

[0002] An electromagnetic thermal repair equipment for cracks in steel reel shafts is a professional device that uses electromagnetic thermal effects to repair cracks in steel reel shafts. It generates an alternating magnetic field to generate an induced current at the cracks in the reel shaft, and then generates heat due to the thermal effect of the current, causing local melting or softening of the cracked area. Combined with subsequent processes, the cracks are repaired and healed, thereby restoring the structural integrity and performance of the reel shaft, extending its service life, and ensuring safe and stable operation of the equipment.

[0003] In the existing technology, the principle of electromagnetic induction is used to generate an alternating magnetic field at the crack of the reel shaft, so that an induced current is generated in the crack tip area. The thermal effect of the current generates heat, causing the tiny area of the crack tip to melt and form a tiny weld, thereby achieving passivation and crack arrest, reducing or eliminating stress concentration at the crack tip, and generating a thermal pressure stress field at the crack tip to inhibit crack propagation. The stress generated by the tissue transformation during the heating and cooling process can also slow down the crack propagation rate. This process only acts on the crack tip and does not affect the base of the reel shaft.

[0004] There are still some problems in the actual application of the above scheme. Although the existing device can complete the crack repair work on the cylindrical shaft, the cylindrical shaft is made of alloy steel with different compositions. The content of different elements will affect the thermal expansion coefficient, elastic modulus and other physical properties of the material. For example, the addition of alloy elements such as chromium and nickel will change the thermal expansion characteristics of steel. If the composition of the repair area is inconsistent with that of the base material, the thermal expansion degree of the two will be different during heating repair, which will cause uneven stress. Uneven stress will reduce the bonding strength between the repair area and the base material, and the repair part cannot be firmly bonded to the base, resulting in the repaired cylindrical shaft being prone to problems such as falling off and cracking of the repair layer during use, which will reduce the repair effect and service life.

[0005] To this end, the present invention provides an electromagnetic heat repair device for cracks in a steel reel shaft and a residual stress elimination process. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the electromagnetic heat repair device for cracks in a steel reel shaft of the present invention comprises a repair device, the repair device comprises a workbench, a movable frame is slidably connected to the top of the workbench, a repair plate is fixedly provided at the bottom of the movable frame, and a reciprocating vibration mechanism is provided inside the repair device; The reciprocating vibration mechanism includes a first contact fixedly arranged inside the workbench, a second contact is arranged on the outer ring surface of the first contact, and an air outlet is opened through the inner arc surface of the third arc plate. The movement of the first contact can continuously contact the second contact, thereby generating vibration on the reel shaft through the third arc plate, and blowing air on the reel shaft through the air outlet on the third arc plate.

[0008] Preferably, the reciprocating vibration mechanism includes an electric guide rail, a slider is slidably connected inside the electric guide rail, a support rod is fixedly connected to the top of the slider, a first arc plate is fixedly connected to the top of the support rod, and a first contact is fixedly connected to the inner arc surface of the first arc plate.

[0009] Preferably, the side of the support rod is fixedly connected to a limit frame, and an inner cavity is opened inside the limit frame; the side wall of the inner cavity of the limit frame is fixedly connected to a first spring, and the other end of the first spring is fixedly connected to a first L rod, and the first spring is set to reset the first L rod during movement, and the first L rod consists of a vertical rod and a transverse rod.

[0010] Preferably, a second arc-shaped plate is fixedly connected to the side of the vertical rod of the first L-shaped rod, and two first L-shaped rods are symmetrically arranged about the central axis of the electric guide rail, and the two first L-shaped rods have different lengths; The reciprocating vibration mechanism further includes a third curved plate, the third curved plate is fixedly connected to the top of the workbench, and the second curved plate is slidably connected inside the third curved plate; A guide groove is provided on the inner arc surface of the third arc-shaped plate, and the air outlet is connected to the guide groove. When the air blown out of the air outlet is blocked by foreign objects on the upper part, the air will escape outward along the guide groove.

[0011] Preferably, a second contact is fixedly connected to the bottom of the third curved plate, the first contact continuously contacts the second contact during movement, and both the second contact and the first contact are elastic balls; When the third arc-shaped plate contacts the reel shaft, it can not only generate vibration, but also blow air to the heated area of the reel shaft through the guide groove while vibrating.

[0012] Preferably, a rotation adjustment mechanism for adjusting the position of the reel shaft is provided on the side of the reciprocating vibration mechanism; The rotation adjustment mechanism includes a second L-shaped rod, which is fixedly connected to the side wall of the vertical rod of the first L-shaped rod; The second L-shaped rod is also composed of a vertical rod and a horizontal rod, and the top of the vertical rod of the second L-shaped rod is provided with an oblique structure; One side of the oblique structure of the second L-rod is in contact with an oblique block, and the inclined surface of the oblique block is adapted to the inclined surface of the second L-rod.

[0013] Preferably, the top of the oblique block is fixedly connected to a movable rack, the side of the movable rack is fixedly connected to a fixed plate, and the bottom of the fixed plate is fixedly connected to a second spring; A fixed frame is provided at the bottom of the second spring, and the fixed frame is fixedly connected to the side wall of the third arc-shaped plate. The fixed frame consists of a frame body and a lower plate. The bottom of the second spring is fixedly connected to the top of the lower plate of the fixed frame. The second spring is provided to reset the movable rack.

[0014] Preferably, the side teeth of the movable rack are engaged with a rotating gear, and an adjusting rod is fixedly connected inside the rotating gear, and the adjusting rod is rotatably connected to the upper part of the inner arc surface of the third arc plate.

[0015] Preferably, the second L-shaped rod slowly moves toward the oblique block when moving, and pushes the oblique block to move upward; There are two groups of the rotation adjustment mechanisms distributed opposite to each other about the central axis of the third arc-shaped plate. The two groups of the rotation adjustment mechanisms will drive the reel shaft to rotate in the forward or reverse direction during the movement.

[0016] A residual stress elimination process for electromagnetic heating repair of cracks in steel reel shafts, specifically: Preparation before repair: Clean the surface of the reel shaft and detect cracks on the reel shaft. After the detection is completed, debug the electromagnetic heating equipment; Electromagnetic heat repair: Place the reel shaft on the third curved plate. Then start the mobile frame, which drives the repair plate to the area to be repaired and lowers it to a suitable height to carry out the repair work. At this time, the movement of the first contact point continuously contacts the second contact point, causing the third curved plate to vibrate and transmit the vibration to the reel shaft through the third curved plate. While vibrating, the second curved plate will move and blow air to the bottom of the reel shaft through the air outlet. Cooling and stress testing: After the insulation is completed, stop heating and let the reel shaft slowly cool to room temperature in the equipment, and use stress testing equipment to perform residual stress testing on the reel shaft; Surface treatment and quality inspection: The repaired reel shaft is surface treated to remove the oxide scale produced during the heating process, and the repaired part is inspected again to ensure that the reel shaft meets the use requirements.

[0017] The beneficial effects of the present invention are as follows: 1. The electromagnetic heat repair equipment for cracks in a steel reel shaft described in the present invention, when the first contact moves linearly under the drive of the slider, since the first contact and the second contact are both elastic structures, and the outer ring surfaces of the first contact and the second contact are in a state of conflict in the initial state, when the first contact moves, the first contact and the second contact will continuously conflict with each other, thereby generating a vibration effect. Since the third curved plate is in direct contact with the reel shaft, the vibration generated at this time will be transmitted through the third curved plate to the reel shaft undergoing heat repair, thereby causing a slight displacement and rearrangement of the atomic lattice inside the shaft material. During the electromagnetic heat repair process, combined with the effect of heat, this microstructural adjustment is more significant, which helps to put the atoms in a more stable energy state, thereby helping to release internal stress in the reel shaft.

[0018] 2. The electromagnetic heat repair equipment for cracks in a steel reel shaft described in the present invention, when the slider moves to the other side, the limit frame, the first spring and the second arc plate will move toward the middle along the guide of the inner cavity of the third arc plate. At this time, the second arc plate on the other side will not move, and when the second arc plate on this side moves, the gas in the cavity of the third arc plate will be ejected through the air outlet. Since the inner arc surface of the third arc plate is in contact with the reel shaft, the air flow ejected through the air outlet at this time will escape outward along the guide direction of the guide groove. The ejected gas at this time can cool the lower arc surface of the reel shaft, thereby making the thermal deformation of the reel shaft in the circumferential direction more uniform, blowing air to cool the lower arc surface to shrink the material of the lower arc surface, and exerting a certain restraining effect on the heating and expansion of the upper arc surface, thereby avoiding excessive thermal stress concentration on the upper arc surface due to excessive expansion, which helps to reduce the risk of crack expansion or new cracks during the repair process.

[0019] 3. The electromagnetic heat repair equipment for cracks in a steel reel shaft described in the present invention, when the oblique block is pushed upward by the oblique structure on its vertical rod, it will synchronously drive the movable rack fixed with the oblique block to move synchronously. Since the fixed plate and the side surface of the movable rack are fixed, the fixed plate will also move synchronously when the movable rack moves upward. At this time, the second spring fixed at the bottom of the fixed plate and the upper part of the lower plate of the fixed frame is in a stretched state. When the fixed plate slides upward, it will synchronously drive the rotating gear meshing with its side teeth to rotate, and then drive the adjusting rod to rotate. Since the reel shaft is in contact with the outer ring surface of the adjusting rod, and is also in contact with the adjusting rod on the other side. Therefore, when the adjusting rod on one side rotates, it can drive the reel shaft to rotate, and then drive the repair area to rotate in a small range, so that each part of the repair area is in a different magnetic field position in turn, the heat distribution is more uniform, and the distribution of thermal stress in the circumferential direction is also more uniform, which reduces the degree of stress concentration and the risk of crack initiation and expansion due to stress concentration. At the same time, when the second L rod on one side is against the oblique block, the reel shaft will rotate, and when the reel shaft needs to rotate further, the second L rod on the other side needs to be against the oblique block. At this time, the interference between the second L rods on both sides and the oblique blocks can increase the heating time of each part, thereby improving the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the reciprocating vibration mechanism shown in the present invention; Figure 3 The present invention shows Figure 2 A in the middle is an enlarged structural diagram; Figure 4 Schematic diagram of the position structure of the second curved plate and the third curved plate shown in the present invention; Figure 5 This is a bottom-up schematic diagram of the three-dimensional structure of the reciprocating vibration mechanism shown in the present invention; Figure 6 It is a schematic diagram of the position structure of the reciprocating vibration mechanism and the rotation adjustment mechanism shown in the present invention; Figure 7 It is a schematic diagram of the exploded structure of the reciprocating vibration mechanism components shown in the present invention; Figure 8 The present invention shows Figure 7 Enlarged structural diagram at point A in the middle.

[0022] In the figure: 1, repair device; 101, workbench; 102, mobile frame; 103, repair plate; 2. Reciprocating vibration mechanism; 201. Electric guide rail; 202. Slider; 203. Support rod; 204. First curved plate; 205. First contact; 206. Limit frame; 207. First spring; 208. First L-shaped rod; 209. Second curved plate; 210. Third curved plate; 211. Second contact; 212. Air outlet; 213. Guide groove; 3. Rotational adjustment mechanism; 301. Second L-bar; 302. Oblique block; 303. Moving rack; 304. Fixed plate; 305. Fixed frame; 306. Second spring; 307. Rotational gear; 308. Adjustment rod. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods. Example 1

[0024] like Figures 1 to 8 As shown, one embodiment of the present invention is: The invention comprises a repair device 1, wherein the repair device 1 comprises a workbench 101, a movable frame 102 is slidably connected to the top of the workbench 101, a repair plate 103 is fixedly provided at the bottom of the movable frame 102, and a reciprocating vibration mechanism 2 is provided inside the repair device 1; The reciprocating vibration mechanism 2 includes a first contact 205 fixedly arranged inside the workbench 101, a second contact 211 is arranged on the outer ring surface of the first contact 205, and an air outlet 212 is opened through the inner arc surface of the third arc plate 210. The movement of the first contact 205 can continuously contact the second contact 211, thereby generating vibration on the reel shaft through the third arc plate 210, and blowing air on the reel shaft through the air outlet 212 on the third arc plate 210.

[0025] Specifically, although the existing device can complete the crack repair work on the cylindrical shaft, the cylindrical shaft is made of alloy steel with different compositions. The content of different elements will affect the thermal expansion coefficient, elastic modulus and other physical properties of the material. For example, the addition of alloy elements such as chromium and nickel will change the thermal expansion characteristics of steel. If the composition of the repair area and the base material are inconsistent, the thermal expansion degree of the two will be different during the heating repair, which will cause uneven stress. The uneven stress will reduce the bonding strength between the repair area and the base material, and the repair part cannot be firmly bonded to the base. As a result, the repaired cylindrical shaft is prone to problems such as shedding and cracking of the repair layer during use, which will reduce the repair effect and service life. Therefore, the present invention solves this problem by setting up a certain structure. When the crack of the reel shaft needs to be repaired, the reel shaft is first placed on the workbench 101. At this time, the mobile frame 102 is started, and the repair plate 103 is driven by the mobile frame 102 to the area to be repaired. When the repair plate 103 arrives at the area to be repaired, the repair plate 103 will drop and start heating, so that the crack of the reel shaft can be repaired. However, the reel shaft is made of alloy steel with different compositions. The content of different elements will affect the thermal expansion coefficient, elastic modulus and other physical properties of the material. For example, the addition of alloy elements such as chromium and nickel will change the thermal expansion characteristics of steel. If the composition of the repair area is inconsistent with that of the base material, the heat treatment will cause the reel shaft to be cracked. When the repair is repeated, the thermal expansion degrees of the two are different, which will cause uneven stress. The uneven stress will reduce the bonding strength between the repair area and the base material, and the repair part cannot be firmly bonded to the base, resulting in the repaired cylindrical shaft being prone to problems such as peeling and cracking of the repair layer during use, which will reduce the repair effect and service life. At this time, the movement of the first contact 205 can continuously contact the second contact 211, and produce a vibration effect on the reel shaft through the third arc plate 210. At the same time, when the first contact 205 moves, the air outlet 212 opened on the third arc plate 210 will be used to blow air to the lower part of the reel shaft, thereby reducing the stress of the reel shaft during repair.

[0026] like Figure 5 As shown, the reciprocating vibration mechanism 2 described in this embodiment includes an electric guide rail 201, a slider 202 is slidably connected inside the electric guide rail 201, a support rod 203 is fixedly connected to the top of the slider 202, a first curved plate 204 is fixedly connected to the top of the support rod 203, a first contact 205 is fixedly connected to the inner curved surface of the first curved plate 204, and a second contact 211 is fixedly connected to the bottom of the third curved plate 210. The first contact 205 will continuously conflict with the second contact 211 during the movement, and the second contact 211 and the first contact 205 are both elastic balls.

[0027] Specifically, when a cracked reel shaft needs to be repaired, the electric guide rail 201 fixed inside the workbench 101 is started. At this time, the electric guide rail 201 drives the slider 202 inside it to move, and at the same time, drives the support rod 203 fixed on the upper part thereof to move synchronously, and at the same time, drives the first curved plate 204 and the first contact point 205 fixed on the upper part of the support rod 203 to move synchronously; When the first contact 205 is driven by the slider 202 to perform a linear motion, since both the first contact 205 and the second contact 211 are elastic structures, and the outer annular surfaces of the first contact 205 and the second contact 211 are in a state of conflict in the initial state, when the first contact 205 moves, the first contact 205 and the second contact 211 will continuously conflict with each other, thereby generating a vibration effect. Since the third curved plate 210 is in direct contact with the reel shaft, the vibration generated at this time will be transmitted to the reel shaft undergoing thermal repair through the third curved plate 210, thereby causing a slight displacement and rearrangement of the atomic lattice inside the reel shaft material. During the electromagnetic thermal repair process, combined with the effect of heat, this microstructural adjustment is more significant, helping to keep the atoms in a more stable energy state, thereby helping to release internal stress in the reel shaft.

[0028] like Figure 3 As shown, the support rod 203 in this embodiment is fixedly connected to the limit frame 206 on the side, and an inner cavity is opened inside the limit frame 206. The side wall of the inner cavity of the limit frame 206 is fixedly connected to a first spring 207, and the other end of the first spring 207 is fixedly connected to a first L-rod 208. The setting of the first spring 207 is used for the reset work of the first L-rod 208 during the movement process. The first L-rod 208 consists of a vertical rod and a transverse rod.

[0029] like Figure 2 As shown, in this embodiment, the second arc-shaped plate 209 is fixedly connected to the side of the vertical rod of the first L-shaped rod 208. Two first L-shaped rods 208 are symmetrically arranged about the central axis of the electric guide rail 201, and the two first L-shaped rods 208 have different lengths. The reciprocating vibration mechanism 2 further includes a third curved plate 210, which is fixedly connected to the top of the workbench 101, and the second curved plate 209 is slidably connected inside the third curved plate 210; A guide groove 213 is formed on the inner curved surface of the third curved plate 210 , and the air outlet 212 is connected to the guide groove 213 . When the air blown out of the air outlet 212 is blocked by foreign objects above, the air will escape outward along the guide groove 213 .

[0030] Specifically, when the support rod 203 moves, the limit frame 206 fixed on its side will move synchronously. Since the limit frame 206 and the first L-shaped rod 208 are connected together by the first spring 207, the limit frame 206 will synchronously drive the first L-shaped rod 208 to move synchronously when it moves. When the slider 202 moves to one side, the limit frame 206, the first spring 207 and the first L-rod 208 on that side will drive the second curved plate 209 to slide outside the cavity of the third curved plate 210, and the gas will flow into the inner cavity of the third curved plate 210 through the air outlet 212. At this time, the first spring 207 on the other side is in a stretched state and the second curved plate 209 remains stationary. At this time, the cavity generated by the movement of the second curved plate 209 will be filled with gas. When the slider 202 moves to the other side, the limit frame 206, the first spring 207 and the second curved plate 209 will move toward the middle along the guide of the inner cavity of the third curved plate 210. At this time, the second curved plate 209 on the other side will not move. When the second curved plate 209 on this side moves, the gas in the cavity of the third curved plate 210 will be ejected through the air outlet 212. Since the inner curved surface of the third curved plate 210 is in contact with the reel shaft, the air flow ejected through the air outlet 212 at this time will escape outward along the guide groove 213. The ejected gas at this time can cool the lower curved surface of the reel shaft, thereby making the thermal deformation of the reel shaft in the circumferential direction more uniform. Blowing air to cool the lower curved surface causes the material of the lower curved surface to shrink, and exerts a certain restraining effect on the heating and expansion of the upper curved surface, thereby avoiding excessive thermal stress concentration on the upper curved surface due to excessive expansion, which helps to reduce the risk of crack expansion or new cracks during the repair process.

[0031] like Figure 6 As shown, the side of the reciprocating vibration mechanism 2 in this embodiment is provided with a rotation adjustment mechanism 3 for adjusting the position of the reel shaft; The rotation adjustment mechanism 3 includes a second L-shaped rod 301, which is fixedly connected to the side wall of the vertical rod of the first L-shaped rod 208; The second L-shaped rod 301 is also composed of a vertical rod and a horizontal rod, and the top of the vertical rod of the second L-shaped rod 301 is provided with an oblique structure; One side of the oblique structure of the second L-shaped rod 301 abuts against an oblique block 302 , and the inclined surface of the oblique block 302 is adapted to the inclined surface of the second L-shaped rod 301 .

[0032] Specifically, when the second curved plate 209 on one side moves toward the middle of the cavity of the third curved plate 210, it will synchronously drive the second L-rod 301 fixed to the vertical rod of the first L-rod 208 to move synchronously. Since the second L-rod 301 is also composed of a vertical rod and a horizontal rod, and the top of the vertical rod is provided with an inclined structure, when the top of the second L-rod 301 contacts the bottom of the inclined block 302, it will use its inclined structure to push the inclined block 302 to move upward, thereby providing corresponding power support for the subsequent operation of the device.

[0033] like Figure 8As shown, in this embodiment, the top of the oblique block 302 is fixedly connected to a movable rack 303, the side of the movable rack 303 is fixedly connected to a fixed plate 304, and the bottom of the fixed plate 304 is fixedly connected to a second spring 306; A fixed frame 305 is provided at the bottom of the second spring 306, and the fixed frame 305 is fixedly connected to the side wall of the third arc-shaped plate 210. The fixed frame 305 consists of a frame body and a lower plate. The bottom of the second spring 306 is fixedly connected to the top of the lower plate of the fixed frame 305. The second spring 306 is set to reset the movable rack 303.

[0034] like Figure 8 As shown, the side teeth of the movable rack 303 in this embodiment are meshed with a rotating gear 307 , and an adjusting rod 308 is fixedly connected inside the rotating gear 307 . The adjusting rod 308 is rotatably connected to the upper part of the inner arc surface of the third arc plate 210 .

[0035] Specifically, since the two first L-shaped rods 208 have different lengths, when the second L-shaped rod 301 on one side is in contact with the inclined surface of the oblique block 302, the second L-shaped rod 301 on the other side will be separated from the lower portion of the oblique block 302 on the other side. When the second L rod 301 is in motion, the oblique block 302 is pushed upward by the oblique structure on its vertical rod, which will synchronously drive the moving rack 303 fixed to the oblique block 302 to move synchronously. Since the fixed plate 304 and the side of the moving rack 303 are fixed, the fixed plate 304 will also move synchronously when the moving rack 303 moves upward. At this time, the second spring 306 fixed to the bottom of the fixed plate 304 and the upper part of the lower plate of the fixed frame 305 is in a stretched state. When the fixed plate 304 slides upward, it will synchronously drive the rotating gear 307 engaged with its side teeth to rotate, and then drive the adjusting rod 308 to rotate. Since the reel shaft is in contact with the outer ring surface of the adjusting rod 308 and is in contact with the adjusting rod 308 on the other side 08 is also in contact, so when the adjusting rod 308 on one side rotates, it can drive the reel shaft to rotate, and then drive the repair area to rotate in a small range, so that each part of the repair area is in a different magnetic field position in turn, the heat distribution is more uniform, and the distribution of thermal stress in the circumferential direction is also more uniform, which reduces the degree of stress concentration and reduces the risk of crack initiation and expansion due to stress concentration. At the same time, when the second L rod 301 on one side is against the oblique block 302, the reel shaft will rotate, and when the reel shaft needs to rotate further, the second L rod 301 on the other side needs to be against the oblique block 302. At this time, the interference between the second L rod 301 on both sides and the oblique block 302 can increase the heating time of each part, thereby improving the heating efficiency. Example 2

[0036] like Figures 1 to 8 As shown in the comparative example 1, another embodiment of the present invention is: a residual stress elimination process for electromagnetic heat repair of cracks in a steel reel shaft, the specific steps comprising: Preparation before repair: Clean the surface of the reel shaft and detect cracks on the reel shaft. After the detection is completed, debug the electromagnetic heating equipment; Electromagnetic heat repair: Place the reel shaft on the third curved plate 210. The mobile frame 102 is then activated, driving the repair plate 103 to the area to be repaired and lowering the repair plate 103 to a suitable height for repair work. The first contact 205 moves, continuously contacting the second contact 211, causing the third curved plate 210 to vibrate. The vibration is then transmitted to the reel shaft through the third curved plate 210. Simultaneously with the vibration, the second curved plate 209 moves and blows air to the bottom of the reel shaft through the air outlet 212. Cooling and stress testing: After the insulation is completed, stop heating and let the reel shaft slowly cool to room temperature in the equipment, and use stress testing equipment to perform residual stress testing on the reel shaft; Surface treatment and quality inspection: The repaired reel shaft is surface treated to remove the oxide scale produced during the heating process, and the repaired part is inspected again to ensure that the reel shaft meets the use requirements.

[0037] Working principle: When a cracked reel shaft needs to be repaired, the electric guide rail 201 fixed inside the workbench 101 is started. At this time, the electric guide rail 201 will drive the slider 202 inside it to move, and at the same time, it will drive the support rod 203 fixed on the upper part to move synchronously, and at the same time, it will drive the first curved plate 204 and the first contact 205 fixed on the upper part of the support rod 203 to move synchronously; When the first contact 205 is driven by the slider 202 to perform a linear motion, since both the first contact 205 and the second contact 211 are elastic structures, and the outer annular surfaces of the first contact 205 and the second contact 211 are in a state of conflict in the initial state, when the first contact 205 moves, the first contact 205 and the second contact 211 will continuously conflict with each other, thereby generating a vibration effect. Since the third curved plate 210 is in direct contact with the reel shaft, the vibration generated at this time will be transmitted to the reel shaft undergoing thermal repair through the third curved plate 210, thereby causing a slight displacement and rearrangement of the atomic lattice inside the reel shaft material. During the electromagnetic thermal repair process, combined with the effect of heat, this microstructural adjustment is more significant, helping to keep the atoms in a more stable energy state, thereby helping to release internal stress in the reel shaft.

[0038] When the support rod 203 moves, the limit frame 206 fixed on its side will move synchronously. Since the limit frame 206 and the first L-shaped rod 208 are connected together by the first spring 207, the movement of the limit frame 206 will synchronously drive the first L-shaped rod 208 to move synchronously. When the slider 202 moves to one side, the limit frame 206, the first spring 207 and the first L-rod 208 on that side will drive the second curved plate 209 to slide outside the cavity of the third curved plate 210, and the gas will flow into the inner cavity of the third curved plate 210 through the air outlet 212. At this time, the first spring 207 on the other side is in a stretched state and the second curved plate 209 remains stationary. At this time, the cavity generated by the movement of the second curved plate 209 will be filled with gas. When the slider 202 moves to the other side, the limit frame 206, the first spring 207 and the second curved plate 209 will move toward the middle along the guide of the inner cavity of the third curved plate 210. At this time, the second curved plate 209 on the other side will not move. When the second curved plate 209 on this side moves, the gas in the cavity of the third curved plate 210 will be ejected through the air outlet 212. Since the inner curved surface of the third curved plate 210 is in contact with the reel shaft, the air flow ejected through the air outlet 212 at this time will escape outward along the guide groove 213. The ejected gas at this time can cool the lower curved surface of the reel shaft, thereby making the thermal deformation of the reel shaft in the circumferential direction more uniform. Blowing air to cool the lower curved surface causes the material of the lower curved surface to shrink, and exerts a certain restraining effect on the heating and expansion of the upper curved surface, thereby avoiding excessive thermal stress concentration on the upper curved surface due to excessive expansion, which helps to reduce the risk of crack expansion or new cracks during the repair process.

[0039] When the second curved plate 209 on one side moves toward the middle of the cavity of the third curved plate 210, it will synchronously drive the second L-rod 301 fixed to the vertical rod of the first L-rod 208 to move synchronously. Since the second L-rod 301 is also composed of a vertical rod and a transverse rod, and the top of the vertical rod is provided with an oblique structure, when the top of the second L-rod 301 contacts the bottom of the oblique block 302, it will use its oblique structure to push the oblique block 302 to move upward, thereby providing corresponding power support for the subsequent operation of the device.

[0040] Since the two first L-shaped rods 208 have different lengths, when the second L-shaped rod 301 on one side is in contact with the inclined surface of the oblique block 302, the second L-shaped rod 301 on the other side will be separated from the lower part of the oblique block 302 on the other side. When the second L rod 301 is in motion, the oblique block 302 is pushed upward by the oblique structure on its vertical rod, which will synchronously drive the moving rack 303 fixed to the oblique block 302 to move synchronously. Since the fixed plate 304 and the side of the moving rack 303 are fixed, the fixed plate 304 will also move synchronously when the moving rack 303 moves upward. At this time, the second spring 306 fixed to the bottom of the fixed plate 304 and the upper part of the lower plate of the fixed frame 305 is in a stretched state. When the fixed plate 304 slides upward, it will synchronously drive the rotating gear 307 engaged with its side teeth to rotate, and then drive the adjusting rod 308 to rotate. Since the reel shaft is in contact with the outer ring surface of the adjusting rod 308 and is in contact with the adjusting rod 308 on the other side 08 is also in contact, so when the adjusting rod 308 on one side rotates, it can drive the reel shaft to rotate, and then drive the repair area to rotate in a small range, so that each part of the repair area is in a different magnetic field position in turn, the heat distribution is more uniform, and the distribution of thermal stress in the circumferential direction is also more uniform, which reduces the degree of stress concentration and reduces the risk of crack initiation and expansion due to stress concentration. At the same time, when the second L rod 301 on one side is against the oblique block 302, the reel shaft will rotate, and when the reel shaft needs to rotate further, the second L rod 301 on the other side needs to be against the oblique block 302. At this time, the interference between the second L rod 301 on both sides and the oblique block 302 can increase the heating time of each part, thereby improving the heating efficiency.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic heat repair device for cracks in a steel reel shaft, comprising a repair device (1), wherein the repair device (1) comprises a workbench (101), a movable frame (102) is slidably connected to the top of the workbench (101), and a repair plate (103) is fixedly provided at the bottom of the movable frame (102), characterized in that; The repair device (1) is provided with a reciprocating vibration mechanism (2) inside; The reciprocating vibration mechanism (2) includes a first contact (205) fixedly arranged inside the workbench (101), a second contact (211) is arranged on the outer ring surface of the first contact (205), and an air outlet (212) is opened through the inner arc surface of the third arc plate (210). The first contact (205) can continuously contact the second contact (211) through the movement of the first contact (205), thereby generating vibration on the reel shaft through the third arc plate (210), and blowing air on the reel shaft through the air outlet (212) on the third arc plate (210).

2. The electromagnetic heating repair equipment for cracks in a steel drum shaft according to claim 1, characterized in that: The reciprocating vibration mechanism (2) comprises an electric guide rail (201), a slider (202) is slidably connected inside the electric guide rail (201), a support rod (203) is fixedly connected to the top of the slider (202), a first arc-shaped plate (204) is fixedly connected to the top of the support rod (203), and a first contact (205) is fixedly connected to the inner arc surface of the first arc-shaped plate (204).

3. The electromagnetic heating repair equipment for cracks in a steel drum shaft according to claim 2, characterized in that: The side of the support rod (203) is fixedly connected to a limit frame (206), and an inner cavity is opened in the limit frame (206); a first spring (207) is fixedly connected to the side wall of the inner cavity of the limit frame (206), and the other end of the first spring (207) is fixedly connected to a first L-shaped rod (208). The first spring (207) is used for resetting the first L-shaped rod (208) during movement. The first L-shaped rod (208) is composed of a vertical rod and a transverse rod.

4. The electromagnetic heating repair equipment for cracks in a steel drum shaft according to claim 3, characterized in that: A second arc-shaped plate (209) is fixedly connected to the side of the vertical rod of the first L-shaped rod (208), two first L-shaped rods (208) are symmetrically arranged about the central axis of the electric guide rail (201), and the two first L-shaped rods (208) have different lengths; The reciprocating vibration mechanism (2) further includes a third curved plate (210), wherein the third curved plate (210) is fixedly connected to the top of the workbench (101), and the second curved plate (209) is slidably connected inside the third curved plate (210); A guide groove (213) is provided on the inner curved surface of the third curved plate (210), and the air outlet (212) is connected to the guide groove (213). When the air blown out of the air outlet (212) is blocked by foreign objects at the top, the air will escape outward along the guide groove (213).

5. The electromagnetic heating repair equipment for cracks in a steel reel shaft according to claim 4, characterized in that: The bottom of the third curved plate (210) is fixedly connected to a second contact point (211), and the first contact point (205) will continuously collide with the second contact point (211) during movement, and the second contact point (211) and the first contact point (205) are both elastic balls; When the third curved plate (210) is in contact with the reel shaft, it can not only generate vibration, but also blow air to the heated area of the reel shaft through the guide groove (213) while vibrating.

6. The electromagnetic heating repair equipment for cracks in a steel drum shaft according to claim 1, characterized in that: A rotation adjustment mechanism (3) for adjusting the position of the reel shaft is provided on the side of the reciprocating vibration mechanism (2); The rotation adjustment mechanism (3) comprises a second L-shaped rod (301), wherein the second L-shaped rod (301) is fixedly connected to the side wall of the vertical rod of the first L-shaped rod (208); The second L-shaped rod (301) is also composed of a vertical rod and a horizontal rod, and the top of the vertical rod of the second L-shaped rod (301) is provided with an oblique structure; One side of the oblique structure of the second L-shaped rod (301) is in contact with an oblique block (302), and the inclined surface of the oblique block (302) is adapted to the inclined surface of the second L-shaped rod (301).

7. The electromagnetic heating repair equipment for cracks in a steel drum shaft according to claim 6, characterized in that: The top of the oblique block (302) is fixedly connected to a movable rack (303), the side of the movable rack (303) is fixedly connected to a fixed plate (304), and the bottom of the fixed plate (304) is fixedly connected to a second spring (306); A fixed frame (305) is provided at the bottom of the second spring (306), and the fixed frame (305) is fixedly connected to the side wall of the third arc-shaped plate (210). The fixed frame (305) consists of a frame body and a lower plate. The bottom of the second spring (306) is fixedly connected to the top of the lower plate of the fixed frame (305). The second spring (306) is provided for resetting the movable rack (303).

8. The electromagnetic heating repair equipment for cracks in a steel drum shaft according to claim 7, characterized in that: The side teeth of the movable rack (303) are meshed with a rotating gear (307), and the rotating gear (307) is fixedly connected with an adjustment rod (308) inside. The adjustment rod (308) is rotatably connected to the upper part of the inner arc surface of the third arc plate (210).

9. The electromagnetic heating repair equipment for cracks in a steel reel shaft according to claim 8, characterized in that: The second L-shaped rod (301) moves slowly toward the oblique block (302) and pushes the oblique block (302) to move upward; Two groups of the rotation adjustment mechanisms (3) are distributed opposite to each other about the central axis of the third arc-shaped plate (210), and the two groups of the rotation adjustment mechanisms (3) will drive the reel shaft to rotate in a forward or reverse direction during movement.

10. A residual stress elimination process for electromagnetic heat repair of cracks in a steel drum shaft, applied to the electromagnetic heat repair equipment for cracks in a steel drum shaft according to claims 1-9, characterized in that: Specifically: Preparation before repair: Clean the surface of the reel shaft and detect cracks on the reel shaft. After the detection is completed, debug the electromagnetic heating equipment; Electromagnetic heat repair: the reel shaft is placed on the third curved plate (210), and the movable frame (102) is started at this time, so that the movable frame (102) drives the repair plate (103) to reach the area to be repaired, and the repair plate (103) is lowered to a suitable height to perform the repair work. At this time, the movement of the first contact (205) continuously contacts the second contact (211), so that the third curved plate (210) vibrates, and the vibration is transmitted to the reel shaft through the third curved plate (210). While vibrating, the second curved plate (209) moves and blows air to the bottom of the reel shaft through the air outlet (212); Cooling and stress testing: After the insulation is completed, stop heating and let the reel shaft slowly cool to room temperature in the equipment, and use stress testing equipment to perform residual stress testing on the reel shaft; Surface treatment and quality inspection: The repaired reel shaft is surface treated to remove the oxide scale produced during the heating process, and the repaired part is inspected again to ensure that the reel shaft meets the use requirements.

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