Coating crack reverse induction forming method based on ultrasonic peening

Abstract

The invention belongs to the technical field of metal surface processing, and particularly relates to a coating crack reverse induction forming method based on ultrasonic peening, which comprises the following steps: selecting alloy steel as a base material, preparing iron-based alloy powder by adopting an argon atomization method, and preparing a coating by adopting laser cladding equipment, a single-layer multi-lap-joint cladding layer is prepared on the surface of alloy steel through a concentric-square-shaped path, flaw detection and development are conducted on the surface of the coating, whether microcracks exist or not is observed, residual stress between the coating and a matrix interface is eliminated through post-heat treatment, and an ABB robot is adopted for clamping ultrasonic impact equipment to achieve reciprocating motion.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface processing, and in particular to a coating crack anti-induction forming method based on ultrasonic impact. Background Art

[0002] Torsion shafts of armored vehicles are often subjected to sudden high impacts and complex and variable load challenges during service, such as tension, compression, torsion, etc., and the surface stress distribution is extremely complex. Long-term service in harsh working conditions such as corrosion causes the torsion shaft to easily crack in parts such as wear and corrosion. Considering the high cost of replacing key parts in the automotive field, surface strengthening and repair work can not only extend its service life, but also comply with my country's policy of sustainable green development of the manufacturing industry. Since 45CrNiMoVA high-strength steel contains more carbon and alloy elements, its weldability is poor, which poses a great challenge to traditional repair processes. Welding (repair welding, surfacing) is a common repair method in the engineering field. It is simple to operate and widely used, but it will cause excessive dilution rate and heat-affected zone. In contrast, thermal spraying technology is easy to operate and efficient, but the mechanical bonding strength problem between the coating and the substrate causes the coating to fall off prematurely.

[0003] In addition, when the high-frequency ultrasonic impact equipment performs high-frequency impact on the surface of a metal component, the metal structure must first be fixed to prevent the metal structure from shifting when it is impacted, thereby affecting the ultrasonic impact equipment to deviate from the area of ​​the metal structure where residual stress is to be eliminated. The existing high-frequency impact equipment can only achieve fixed processing of one type of metal structure, reducing the utilization rate of the equipment. Summary of the invention

[0004] A high-frequency ultrasonic impact device proposed in the present invention includes a tooling bracket, to which the same impact processing platform is fixedly connected, and an adjustment clamping module is arranged on the impact processing platform, the adjustment clamping module includes a mounting cross plate, and the impact processing platform is provided with slide groove openings at equal distances, and the interior of each slide groove opening is slidably connected with an adjustment slide seat.

[0005] In a preferred solution, the upper sides of the multiple adjustment slides are connected with L support rods by bolts, and the sides of the multiple L support rods are fixedly connected with electric telescopic rods, the driving ends of the multiple electric telescopic rods are fixedly connected with lifting plates, the bottoms of the multiple lifting plates are fixedly connected with telescopic springs, and the other ends of the multiple telescopic springs are fixedly connected with clamping soft plates.

[0006] In a preferred solution, one side of the two L-support rods located on the same side are both connected to the same tooling mounting rod by bolts, and the two tooling mounting rods are both connected to a clamping fixing platform by bolts, the sides of the two clamping fixing platforms are both fixedly connected to a limited circular frame, the outsides of the two limited circular frames are both connected to a linkage tooth plate through bearings, and the sides of the two linkage tooth plates are evenly spaced with arc-shaped pushing grooves.

[0007] In a preferred solution, the sides of the two clamping and fixing platforms are fixedly connected with a servo motor 1, and the driving ends of the two servo motors 1 are fixedly connected with an adjusting gear, the adjusting gear is meshed with the tooth block end of the linkage gear plate, slideways are equidistantly provided on the sides of the two clamping and fixing platforms, and the interiors of the multiple slideways are slidably connected with pushing sliders, and the sides of the multiple pushing sliders are fixedly connected with round push rods, which are located inside the arc-shaped pushing grooves.

[0008] In a preferred embodiment, the sides of the multiple pushing sliders are fixedly connected to two clamping smooth columns, and the other ends of the two clamping smooth columns on the same pushing slider are fixedly connected to the same arc-shaped clamping plate, and a circular hole one is opened at the bottom of the multiple adjusting slides, and the interiors of the multiple circular holes one are connected to a rotating shaft through a bearing.

[0009] In a preferred solution, a servo motor 2 is fixedly connected to the mounting horizontal plate, and a driving end of the servo motor 2 is fixedly connected to a cross-linking plate, and two circular holes are equidistantly provided on the cross-linking plate, and a plurality of circular holes 2 are internally connected to a rotating shaft 1 through bearings, and adjacent rotating shafts 1 and the outside of the rotating shaft are movably connected to the same push-pull support rod, and a protective frame is fixedly connected to the impact processing platform, and an ultrasonic generator body is arranged on the outside of the protective frame.

[0010] By setting up an adjustable clamping module, the ultrasonic impact equipment is used to process the surface of metal components. When processing a metal plate, the metal plate is placed above the impact processing platform, and then the servo motor 2 is started. The servo motor 2 drives the cross linkage plate to rotate, and the cross linkage plate drives the push-pull support rod to make the adjustment slide move in the slide groove on the impact processing platform. When the clamping soft plate moves to the upper side of the metal plate, the servo motor 2 is stopped, and then the electric telescopic rod is started to drive the lifting plate so that the clamping soft plate fixes the metal plate, and the metal cylinder is subjected to the impact. During working hours, the metal cylinder is placed in the arc-shaped clamping plates in the two clamping and fixing tables, and then servo motor 1 is started. The servo motor 1 drives the adjusting gear to rotate, so that the adjusting gear drives the linkage tooth plate to rotate, and the arc-shaped push groove on the linkage tooth plate drives the round push rod to push the slider to move in the slideway on the clamping and fixing table, so that the push slider drives the arc-shaped clamping plate on the clamping smooth column to clamp and fix the metal cylinder. By adjusting the clamping module, the high-frequency impact equipment can realize fixed processing of different types of metal structural parts, thereby improving the utilization rate of the equipment.

[0011] In a preferred embodiment, two limiting cylinders are fixedly connected to the opposite side of the protective frame, and the outside of the two limiting cylinders is slidably connected to the same nut slide seat, screw holes are provided on the side of the nut slide seat, and circular holes three are provided on both sides of the protective frame, and the inside of the two circular holes three are connected to the same screw rod through bearings.

[0012] In a preferred solution, a lead screw motor is fixedly connected to the side of the protective frame, and the driving end of the lead screw motor is connected to one end of the lead screw through a coupling, and extrusion springs are fixedly connected to multiple sides of the nut slide at equal distances, and the other ends of multiple extrusion springs located on the same side are fixedly connected to the same U-shaped mounting frame, and four circular holes are evenly spaced on both sides of the multiple U-shaped mounting frames, and the interiors of two opposite circular holes are connected to the same ball through bearings, and the outside of the ball is against the outside of the limiting cylinder.

[0013] In a preferred embodiment, two electric drive rods 1 are fixedly connected to the bottom of the nut slide, and the driving ends of the two electric drive rods 1 are fixedly connected to the same limiting track, the internal sliding connection of the limiting track is connected to the movable slide, the bottom of the movable slide is fixedly connected to the ultrasonic impact gun body, the side of the limiting track is fixedly connected to the electric drive rod 2, and the driving end of the electric drive rod 2 is fixedly connected to the side of the movable slide.

[0014] By providing a screw motor, a screw, a limiting cylinder, a nut slide, an electric drive rod 1, an electric drive rod 2, a limiting track, a movable slide, an extrusion spring, a U-shaped mounting frame and a ball, when the surface of a metal component is processed by the ultrasonic impact gun body, the screw motor is started, and the screw motor drives the screw to make the nut slide slide outside the limiting cylinder, and the electric drive rod 2 drives the movable slide to move in the limiting track, so as to adjust the horizontal position of the ultrasonic impact gun body, and while the nut slide moves, the elasticity of the extrusion spring makes the ball in the U-shaped mounting frame counteract the outside of the limiting cylinder, and the contact area between the ball and the limiting cylinder is small, so as to reduce the friction on the limiting cylinder, and the limiting track is driven up and down by the electric drive rod 1, so as to adjust the height of the ultrasonic impact gun body, realize the adjustment of the position of the ultrasonic impact gun body, avoid the staff to process the outside of the metal component by hand, and improve its processing stability.

[0015] In a preferred solution, universal movable wheels are fixedly connected to the bottom of the tooling bracket at equal distances.

[0016] A coating crack anti-induction forming method based on ultrasonic impact, comprising the following steps:

[0017] S1. Pretreatment of substrate material.

[0018] S2. Powder design and preparation.

[0019] S3. Dry the alloy powder in S2 in a drying oven at 110°C for 2 h, and then use laser cladding technology to plan paths on the substrate surface and prepare coatings.

[0020] S4. Perform flaw detection and development on the coating surface to observe whether there are microcracks on the surface. If there are cracks, return to S3 to prepare the coating again. If there are no cracks, proceed to S5.

[0021] S5. Use post-heat treatment to eliminate residual stress at the interface between the coating and the substrate.

[0022] S6. The coating surface is milled, and then the coating surface is treated by the aforementioned high-frequency ultrasonic impact equipment.

[0023] Furthermore, S1 is specifically:

[0024] The oxide film and oil stains in the damaged area of ​​45CrNiMoVA steel were removed by using 200-mesh and 400-mesh sandpaper, and the surface was cleaned with anhydrous ethanol to show the damaged area.

[0025] Furthermore, S2 is specifically:

[0026] The iron-based alloy powder is prepared by argon atomization method. The weight ratio of each element in the iron-based alloy powder is: C0.18%-0.24%, Ni 1.8%-2.5%, Cr 17%-18.5%, Mn0.13%-0.25%, Si 0.9%-1.2%, B1.1%-1.4%, and the balance is iron. The powder particle size is 45-150μm, and the spherical powder is ≥90%.

[0027] Furthermore, S3 is specifically:

[0028] The path optimization is a single-layer scanning mode with a U-shaped shape. The single-layer thickness is 900-1200μm. Laser cladding process parameters: 4-way powder feeding, laser power 2100W, spot diameter 3mm, scanning speed 1200mm / min, powder tray speed 1.2r / min, overlap rate 50%, argon gas is used for both powder feeding gas and shielding gas, powder feeding gas flow rate 12L / min, shielding gas flow rate 15L / min.

[0029] Furthermore, S5 is specifically:

[0030] The laser cladding product is placed in a resistance furnace for annealing and stress relief treatment. The temperature is kept for 3 hours, then cooled in the furnace for 1 hour and then taken out for air cooling. The temperature of the resistance furnace is 260℃±10℃.

[0031] Furthermore, S6 is specifically:

[0032] No external force was applied during the ultrasonic impact process, and the impact was performed by relying on the impact needle's own gravity. The impact current was 0.44A, the impact frequency was 20.5kHz, and the impact time was 10min.

[0033] Compared with the prior art, this patent has the following effects:

[0034] The high-frequency ultrasonic impact equipment provided by the present invention has the beneficial effect of enabling the high-frequency impact equipment to perform fixed processing on different types of metal structural parts, thereby improving the utilization rate of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the main structure of a high-frequency ultrasonic impact device proposed by the present invention;

[0036] Figure 2 A schematic side view of the structure of a high-frequency ultrasonic impact device proposed by the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of an adjustment and clamping module of a high-frequency ultrasonic impact device proposed by the present invention;

[0038] Figure 4 A schematic diagram of the structure of a partial adjustment and clamping module of a high-frequency ultrasonic impact device proposed by the present invention;

[0039] Figure 5 A schematic diagram of the structure of an arc-shaped clamping plate of a high-frequency ultrasonic impact device proposed by the present invention;

[0040] Figure 6 A schematic diagram of the structure of a cross-linked plate of a high-frequency ultrasonic impact device proposed by the present invention;

[0041] Figure 7 A schematic diagram of a protective frame structure of a high-frequency ultrasonic impact device proposed by the present invention;

[0042] Figure 8 This is a schematic diagram of the nut slide structure of a high-frequency ultrasonic impact device proposed in the present invention.

[0043] In the figure: 1. tooling bracket; 2. impact processing platform; 3. universal moving wheel; 4. adjusting clamping module; 401. slide slot; 402. adjusting slide seat; 403. L support rod; 404. tooling installation rod; 405. clamping fixed platform; 406. electric telescopic rod; 407. lifting plate; 408. telescopic spring; 409. clamping soft plate; 410. servo motor 1; 411. adjusting gear; 412. limit circular frame; 413. linkage tooth plate; 414. arc-shaped pushing groove; 415. slideway; 416. pushing slide block; 417. clamping smooth Column; 418, arc clamping plate; 419, rotating shaft; 420, mounting cross plate; 421, servo motor 2; 422, cross linkage plate; 423, rotating shaft 1; 424, push-pull support rod; 425, round push rod; 5, ultrasonic generator body; 6, protective frame; 7, limiting cylinder; 8, nut slide; 9, screw; 10, screw motor; 11, electric drive rod 1; 12, limiting track; 13, moving slide; 14, ultrasonic impact gun body; 15, electric drive rod 2; 16, extrusion spring; 17, U-shaped mounting frame; 18, ball bearing. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0045] Example 1

[0046] A high-frequency ultrasonic impact device disclosed in the present invention is mainly used in scenarios where the high-frequency ultrasonic impact device needs to fix the metal structural part first when performing high-frequency impact on the surface of the metal component to prevent the metal structural part from shifting when being impacted, thereby affecting the ultrasonic impact device to deviate from the area of ​​the metal structural part where residual stress is to be eliminated. The existing high-frequency impact device can only realize the fixed processing of one type of metal structural part, reducing the utilization rate of the device.

[0047] Reference Figure 1-Figure 5 A high-frequency ultrasonic impact device includes a tooling bracket 1, to which the same impact processing platform 2 is fixedly connected, and an adjustment clamping module 4 is arranged on the impact processing platform 2, and the adjustment clamping module 4 includes a mounting cross plate 420, and slide grooves 401 are opened at equal distances on the impact processing platform 2, and an adjustment slide seat 402 is slidably connected inside each slide groove 401.

[0048] Reference Figure 1-Figure 5 The upper sides of the multiple adjustment slides 402 are all connected to L support rods 403 by bolts, and the sides of the multiple L support rods 403 are fixedly connected to electric telescopic rods 406, the driving ends of the multiple electric telescopic rods 406 are fixedly connected to lifting plates 407, the bottoms of the multiple lifting plates 407 are fixedly connected to telescopic springs 408, and the other ends of the multiple telescopic springs 408 are fixedly connected to clamping soft plates 409.

[0049] Reference Figure 1-Figure 5 One side of the two L-support rods 403 located on the same side is connected to the same tooling installation rod 404 by bolts, and the two tooling installation rods 404 are connected to a clamping and fixing platform 405 by bolts, the sides of the two clamping and fixing platforms 405 are fixedly connected to a limited circular frame 412, and the outsides of the two limited circular frames 412 are connected to a linkage tooth plate 413 through bearings, and the sides of the two linkage tooth plates 413 are evenly spaced with arc-shaped pushing grooves 414.

[0050] Reference Figure 1-Figure 5 The sides of the two clamping and fixing platforms 405 are fixedly connected with a servo motor 410, and the driving ends of the two servo motors 410 are fixedly connected with an adjusting gear 411, and the adjusting gear 411 is meshed with the tooth block end of the linkage tooth plate 413. Slideways 415 are equidistantly provided on the sides of the two clamping and fixing platforms 405, and the interiors of the multiple slideways 415 are slidably connected with a pushing slider 416, and the sides of the multiple pushing sliders 416 are fixedly connected with a round push rod 425, and the round push rod 425 is located inside the arc-shaped pushing groove 414.

[0051] Reference Figure 1-Figure 5 The sides of the multiple pushing sliders 416 are fixedly connected to two clamping smooth columns 417, and the other ends of the two clamping smooth columns 417 located on the same pushing slider 416 are fixedly connected to the same arc-shaped clamping plate 418, and the bottoms of the multiple adjusting slides 402 are each provided with a circular hole 1, and the interiors of the multiple circular holes 1 are each connected to a rotating shaft 419 through a bearing.

[0052] Reference Figure 1-Figure 6A servo motor 421 is fixedly connected to the mounting cross plate 420, and a cross-linking plate 422 is fixedly connected to the driving end of the servo motor 421. The cross-linking plate 422 is provided with two circular holes at equal intervals, and a rotating shaft 423 is connected to the inside of the plurality of circular holes through bearings. The adjacent rotating shafts 423 and the outside of the rotating shaft 419 are movably connected with the same push-pull support rod 424. A protective frame 6 is fixedly connected to the impact processing platform 2, and an ultrasonic generator body 5 is arranged on the outside of the protective frame 6.

[0053] In a specific application scenario, the ultrasonic impact equipment is used to process the surface of a metal component. When processing a metal plate, the metal plate is placed above the impact processing platform 2, and then the servo motor 421 is started. The servo motor 421 drives the cross-linking plate 422 to rotate, and the cross-linking plate 422 drives the push-pull support rod 424 to make the adjustment slide 402 move in the slide groove 401 on the impact processing platform 2. When the clamping soft plate 409 moves to the upper side of the metal plate, the servo motor 421 is stopped, and then the electric telescopic rod 406 is started to drive the lifting plate 407 so that the clamping soft plate 409 fixes the metal plate. When processing a metal cylinder, the metal is placed on the impact processing platform 2. The metal cylinder is placed in the arc-shaped clamping plate 418 in the two clamping and fixing platforms 405, and then the servo motor 410 is started, and the servo motor 410 drives the adjusting gear 411 to rotate, so that the adjusting gear 411 drives the linkage tooth plate 413 to rotate, and the arc-shaped pushing groove 414 on the linkage tooth plate 413 drives the round push rod 425 to make the pushing slider 416 move in the slideway 415 on the clamping and fixing platform 405, so that the pushing slider 416 drives the arc-shaped clamping plate 418 on the clamping smooth column 417 to clamp and fix the metal cylinder. By adjusting the clamping module 4, the high-frequency impact equipment can realize the fixed processing of different types of metal structural parts, thereby improving the utilization rate of the equipment.

[0054] Reference Figure 7 and Figure 8 Two limiting cylinders 7 are fixedly connected to the opposite side of the protective frame 6, and the outside of the two limiting cylinders 7 is slidably connected to the same nut slide 8, and screw holes are provided on the side of the nut slide 8. Circular holes three are provided on both sides of the protective frame 6, and the inside of the two circular holes three is connected to the same screw rod 9 through bearings.

[0055] Reference Figure 7 and Figure 8A screw motor 10 is fixedly connected to the side of the protective frame 6, and the driving end of the screw motor 10 is connected to one end of the screw 9 through a coupling. Extrusion springs 16 are fixedly connected to multiple sides of the nut slide 8 at equal distances. The other ends of multiple extrusion springs 16 on the same side are fixedly connected to the same U-shaped mounting frame 17. Four circular holes are evenly spaced on both sides of the multiple U-shaped mounting frames 17. The interiors of the two opposite circular holes are connected to the same ball 18 through bearings, and the outside of the ball 18 is against the outside of the limiting cylinder 7.

[0056] Reference Figure 7 and Figure 8 Two electric drive rods 11 are fixedly connected to the bottom of the nut slide 8, and the driving ends of the two electric drive rods 11 are fixedly connected to the same limiting track 12, the internal sliding connection of the limiting track 12 is connected to a movable slide 13, the bottom of the movable slide 13 is fixedly connected to an ultrasonic impact gun body 14, and the side of the limiting track 12 is fixedly connected to an electric drive rod 2 15, and the driving end of the electric drive rod 2 15 is fixedly connected to the side of the movable slide 13.

[0057] In a specific application scenario, when the surface of a metal component is processed by the ultrasonic impact gun body 14, the screw motor 10 is started, and the screw motor 10 drives the screw 9 to make the nut slide 8 slide outside the limiting cylinder 7, and the electric drive rod 15 drives the movable slide 13 to move in the limiting track 12, thereby adjusting the horizontal position of the ultrasonic impact gun body 14. While the nut slide 8 is moving, the elasticity of the extrusion spring 16 makes the ball 18 in the U-shaped mounting frame 17 counteract the outside of the limiting cylinder 7, and the contact area between the ball 18 and the limiting cylinder 7 is small, thereby reducing the friction on the limiting cylinder 7, and the limiting track 12 is driven up and down by the electric drive rod 1 11, thereby adjusting the height of the ultrasonic impact gun body 14, and realizing the adjustment of the position of the ultrasonic impact gun body 14, avoiding the staff from processing the outside of the metal component by hand, and improving its processing stability.

[0058] Reference Figure 2 The bottom of the tooling bracket 1 is fixedly connected with universal movable wheels 3 at equal distances.

[0059] Working principle: The ultrasonic impact device is used to process the surface of metal components. When processing a metal plate, the metal plate is placed on the impact processing platform 2, and then the servo motor 421 is started. The servo motor 421 drives the cross linkage plate 422 to rotate, and the cross linkage plate 422 drives the push-pull support rod 424 to make the adjustment slide 402 move in the slide groove 401 on the impact processing platform 2. When the clamping soft plate 409 moves to the upper side of the metal plate, the servo motor 421 is stopped, and then the electric telescopic rod 406 is started. The movable lifting plate 407 allows the clamping soft plate 409 to fix the metal plate body. When processing the metal cylinder, the metal cylinder is placed in the arc clamping plate 418 in the two clamping fixed platforms 405, and then the servo motor 410 is started. The servo motor 410 drives the adjusting gear 411 to rotate, so that the adjusting gear 411 drives the linkage tooth plate 413 to rotate, and the arc pushing groove 414 on the linkage tooth plate 413 drives the round push rod 425 to push the slider 416 to move in the slideway 415 on the clamping fixed platform 405, so that The slider 416 is pushed to drive the arc-shaped clamping plate 418 on the clamping smooth column 417 to clamp and fix the metal cylinder. By adjusting the clamping module 4, the high-frequency impact equipment can realize fixed processing of different types of metal structural parts, thereby improving the utilization rate of the equipment. When the surface of the metal component is processed by the ultrasonic impact gun body 14, the screw motor 10 is started, and the screw motor 10 drives the screw 9 to make the nut slide 8 slide outside the limiting cylinder 7, and the electric drive rod 15 drives the moving slide 13 to move in the limiting track 12, thereby The horizontal position of the impact gun body 14 is adjusted, and when the nut slide 8 moves, the elasticity of the extrusion spring 16 makes the ball 18 in the U-shaped mounting frame 17 abut against the outside of the limiting cylinder 7. The contact area between the ball 18 and the limiting cylinder 7 is small, thereby reducing the friction on the limiting cylinder 7. The limiting track 12 is driven up and down by the electric driving rod 11, thereby adjusting the height of the ultrasonic impact gun body 14, and realizing the adjustment of the position of the ultrasonic impact gun body 14, avoiding the staff from processing the outside of the metal component by hand, and improving its processing stability.

[0060] Example 2

[0061] A coating crack anti-induction forming method based on ultrasonic impact, comprising the following steps:

[0062] S1. Matrix material pretreatment

[0063] The oxide film and oil stains in the damaged area of ​​45CrNiMoVA steel were removed by using 200-mesh and 400-mesh sandpaper, and the surface was cleaned with anhydrous ethanol to show the damaged area.

[0064] S2. Powder design and preparation

[0065] The iron-based alloy powder is prepared by argon atomization method. The weight ratio of each element in the iron-based alloy powder is: C0.18%-0.24%, Ni 1.8%-2.5%, Cr 17%-18.5%, Mn0.13%-0.25%, Si 0.9%-1.2%, B1.1%-1.4%, and the balance is iron. The powder particle size is 45-150μm, and the spherical powder is ≥90%.

[0066] S3. Dry the alloy powder in S2 in a drying oven at 110°C for 2 h, and then use laser cladding technology to plan paths on the substrate surface and prepare coatings.

[0067] The path optimization is a single-layer scanning mode with a U-shaped shape. The single-layer thickness is 900-1200μm. Laser cladding process parameters: 4-way powder feeding, laser power 2100W, spot diameter 3mm, scanning speed 1200mm / min, powder tray speed 1.2r / min, overlap rate 50%, argon gas is used for both powder feeding gas and shielding gas, powder feeding gas flow rate 12L / min, shielding gas flow rate 15L / min.

[0068] S4. Perform flaw detection and development on the coating surface to observe whether there are microcracks on the surface. If there are cracks, return to S3 to prepare the coating again. If there are no cracks, proceed to S5.

[0069] S5. Use post-heat treatment to eliminate residual stress at the interface between the coating and the substrate.

[0070] The laser cladding product is placed in a resistance furnace for annealing and stress relief treatment. The temperature is kept for 3 hours, then cooled in the furnace for 1 hour and then taken out for air cooling. The temperature of the resistance furnace is 260℃±10℃.

[0071] S6. Milling the coating surface, and then using the high-frequency ultrasonic impact equipment in Example 1 to treat the coating surface.

[0072] No external force was applied during the ultrasonic impact process, and the impact was performed by relying on the impact needle's own gravity. The impact current was 0.44A, the impact frequency was 20.5kHz, and the impact time was 10min.

[0073] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-frequency ultrasonic impact device, comprising a tooling support (1), characterized in that: The tooling bracket (1) is fixedly connected to the same impact processing platform (2), and the impact processing platform (2) is provided with an adjustment clamping module (4), the adjustment clamping module (4) comprises a mounting cross plate (420), and the impact processing platform (2) is provided with sliding groove openings (401) at equal intervals, and the interior of each sliding groove opening (401) is slidably connected to an adjustment slide seat (402).

2. A high-frequency ultrasonic impact device according to claim 1, characterized in that: The upper sides of the plurality of adjustment slide seats (402) are all connected to L support rods (403) by bolts, and the sides of the plurality of L support rods (403) are all fixedly connected to electric telescopic rods (406), the driving ends of the plurality of electric telescopic rods (406) are all fixedly connected to lifting plates (407), the bottoms of the plurality of lifting plates (407) are all fixedly connected to telescopic springs (408), and the other ends of the plurality of telescopic springs (408) are all fixedly connected to a clamping soft plate (409).

3. A high-frequency ultrasonic impact device according to claim 2, characterized in that: One side of the two L-support rods (403) located on the same side is connected to the same tooling installation rod (404) by bolts, and the two tooling installation rods (404) are connected to a clamping and fixing platform (405) by bolts, and the sides of the two clamping and fixing platforms (405) are fixedly connected to a limited circular frame (412), and the outsides of the two limited circular frames (412) are connected to a linkage tooth plate (413) by bearings, and the sides of the two linkage tooth plates (413) are evenly spaced and provided with arc-shaped pushing grooves (414).

4. A high-frequency ultrasonic impact device according to claim 3, characterized in that: The sides of the two clamping and fixing platforms (405) are fixedly connected with servo motors 1 (410), and the driving ends of the two servo motors 1 (410) are fixedly connected with adjusting gears (411), and the adjusting gears (411) are meshed with the tooth block ends of the linkage toothed plates (413). Slideways (415) are equidistantly provided on the sides of the two clamping and fixing platforms (405), and a plurality of slideways (415) are slidably connected inside with push sliders (416), and a plurality of push sliders (416) are fixedly connected on the sides with round push rods (425), and the round push rods (425) are located inside the arc-shaped push grooves (414).

5. A high-frequency ultrasonic impact device according to claim 4, characterized in that: The sides of the plurality of pushing sliders (416) are fixedly connected to two clamping smooth columns (417), and the other ends of the two clamping smooth columns (417) on the same pushing slider (416) are fixedly connected to the same arc-shaped clamping plate (418), and the bottoms of the plurality of adjusting slide seats (402) are each provided with a circular hole one, and the interiors of the plurality of circular holes one are each connected to a rotating shaft (419) via a bearing.

6. A high-frequency ultrasonic impact device according to claim 5, characterized in that: The mounting cross plate (420) is fixedly connected to a servo motor 2 (421), and the driving end of the servo motor 2 (421) is fixedly connected to a cross linkage plate (422), and the cross linkage plate (422) is provided with two circular holes at equal intervals, and the interiors of the plurality of circular holes 2 are all connected to a rotating shaft 1 (423) via bearings, and the exteriors of adjacent rotating shafts 1 (423) and the rotating shaft (419) are movably connected to the same push-pull support rod (424), and a protective frame (6) is fixedly connected to the impact processing platform (2), and an ultrasonic generator body (5) is arranged outside the protective frame (6).

7. A coating crack anti-induction forming method based on ultrasonic impact, characterized in that: The following steps are involved: S1. Pretreatment of substrate materials; S2. Powder design and preparation; S3. The alloy powder in S2 was dried in a drying oven at 110°C for 2 h, and then a path was planned on the substrate surface and a coating was prepared by laser cladding technology; S4. Perform flaw detection and development on the coating surface to observe whether there are microcracks on the surface; If cracks exist, return to S3 to prepare the coating again; if no cracks exist, proceed to S5; S5. Use post-heat treatment to eliminate the residual stress between the coating and the substrate interface; S6. The coating surface is milled and then treated with a high-frequency ultrasonic impact device.

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