CN114150307A - Method for repairing surface cracks of shaft parts - Google Patents
Method for repairing surface cracks of shaft parts Download PDFInfo
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- CN114150307A CN114150307A CN202111306009.1A CN202111306009A CN114150307A CN 114150307 A CN114150307 A CN 114150307A CN 202111306009 A CN202111306009 A CN 202111306009A CN 114150307 A CN114150307 A CN 114150307A
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- cladding
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- 238000000034 method Methods 0.000 title claims abstract description 64
- 238000005253 cladding Methods 0.000 claims abstract description 81
- 238000004372 laser cladding Methods 0.000 claims abstract description 73
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 32
- 239000000523 sample Substances 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 15
- 239000000956 alloy Substances 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 239000000155 melt Substances 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
Abstract
The method for repairing the surface cracks of the shaft parts comprises the steps of firstly cleaning the shaft parts and carrying out flaw detection to detect the crack depth of the shaft parts, repairing the shaft parts if the detected crack depth is not more than 500 micrometers, and otherwise carrying out scrapping treatment; then repairing cracks of the shaft parts with the crack depth not more than 100 micrometers by a pulse current discharge method, repairing the shaft parts with the crack depth between 100 micrometers and 500 micrometers by a laser cladding method, and applying ultrasonic vibration to the cladding layer during cladding. The invention adopts the pulse current discharge method to repair the crack with the depth not more than 100 microns, inhibits the crack from expanding and kills the crack at the initial stage; for cracks with the depth of 100-500 microns, the laser cladding method is adopted for repairing and the ultrasonic vibration is applied to the cladding layer during cladding, so that residual micro bubbles in a molten pool can be effectively vibrated, grains of the cladding layer are refined, the grains in the cladding layer are distributed more uniformly, the compactness is higher, the cladding quality is higher, and the reliability and effectiveness of crack repair are higher.
Description
Technical Field
The invention relates to a method for repairing surface cracks of shaft parts, which is used for repairing cracks of the shaft parts.
Background
The laser cladding technology is one of important technologies for realizing surface repair and remanufacture, can obtain a cladding layer with better performance than a base material, endows important performances of wear resistance, corrosion resistance, fatigue resistance, high temperature resistance and the like to parts, is particularly suitable for green remanufacture and engineering application of metal parts (such as machine tool parts, aircraft engine blades, rail vehicles, automobile engines and the like), relates to various advanced technologies such as a laser material technology, a laser process technology and the like, can repair the parts to the original appearance size, can enable the performance of a repaired product to exceed a new product, is a new means and a new technology for realizing repair of major engineering and mechanical equipment, and is a potential development direction in the future. At present, the laser cladding technology is widely applied to the field of engineering remanufacturing.
The existing laser cladding repair scheme for the shaft parts does not classify cracks according to crack depths, and all the classified cracks adopt the laser cladding scheme.
CN104532233B discloses a motor rotor shaft position laser cladding repair method, which avoids the problems generated in the laser cladding process, and most importantly, cracks or air holes are generated due to the factors of different thermal expansion coefficients of a cladding layer and a base material, overlapping ratio in the cladding process and the like in the laser cladding process.
CN110846652A discloses an axle repairing method and a remanufactured axle, the scheme adopts a multilayer cladding layer to repair a damaged part, although the mechanical property of the remanufactured axle is improved, the workload of repairing a rotating shaft is greatly increased; the repair method of the multilayer cladding layer is not suitable for repairing shallow crack defects, and only the first cladding layer can be combined with the axle substrate, so that the flowing and compounding of materials of the cladding layer and the axle substrate are not facilitated.
CN112853346A discloses a laser cladding refabrication device and refabrication method of rail vehicle axletree, and this scheme is through adopting ultrasonic wave impact technique to treat the substrate surface of restoreing the axletree and assault, has solved the problem of the structure coarsening and the residual tensile stress of substrate heat damage layer in the laser cladding refabrication process. However, no measures are taken to inhibit defects with crack depths of less than 0.1mm, and the destruction of cracks at the initiation stage is a more effective preventive maintenance.
CN106624365B discloses an electromagnetic composite field cooperation laser remanufacturing device for a steam turbine rotor shaft, which is characterized in that an external electric field and a magnetic field are simultaneously acted in a molten pool in the process of repairing the rotor shaft by laser remanufacturing. In order to generate the Lorentz force with flexible and controllable direction, size and frequency to effectively regulate and control the fluid movement of the laser molten pool, the technological parameters need to be continuously optimized. The scheme has low efficiency, and different rotating shaft structures and different rotating shaft materials need to develop different process parameters.
Disclosure of Invention
According to the method for repairing the surface cracks of the shaft parts, provided by the invention, the cracks with the depth not more than 100 micrometers are repaired by adopting a pulse current discharge method, so that the micro cracks are effectively repaired, the crack expansion is inhibited, and the cracks are eliminated at the initial stage; for cracks with the depth of 100-500 microns, the laser cladding method is adopted for repairing and the ultrasonic vibration is applied to the cladding layer during cladding, so that residual micro bubbles in a molten pool can be effectively vibrated, grains of the cladding layer are refined, the grains in the cladding layer are distributed more uniformly, the compactness is higher, the cladding quality is higher, and the reliability and effectiveness of crack repair are higher.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for repairing the surface cracks of the shaft parts is characterized by comprising the following steps: firstly, cleaning a shaft part, carrying out flaw detection to detect the depth of cracks of the shaft part, repairing the shaft part if the detected depth of the cracks is not more than 500 micrometers, and otherwise, carrying out scrapping treatment; then repairing cracks of the shaft parts with the crack depth not more than 100 micrometers by a pulse current discharge method, repairing the shaft parts with the crack depth between 100 micrometers and 500 micrometers by a laser cladding method, and applying ultrasonic vibration to the cladding layer during cladding.
Preferably, the step of repairing the cracks of the shaft parts with the crack depth not more than 100 microns by using the pulse current discharge method refers to the step of connecting the shaft parts to two ends of an external circuit of the pulse current discharge device and adjusting the pulse current density to be 20-40 A/mm2The pulse frequency is 200Hz, the single discharge time is 2-5 minutes, and the cracks on the shaft parts are repaired by multiple discharges.
Preferably, the step of repairing the shaft part with the crack depth of 100-500 micrometers by using a laser cladding method and applying ultrasonic vibration to the cladding layer during cladding specifically includes:
the first step is as follows: horizontally clamping the shaft part, arranging a laser cladding spray head above the crack position of the shaft part, arranging a laser lamp and a powder feeder for conveying alloy powder into the laser cladding spray head on the laser cladding spray head, wherein the vertical gap between the nozzle end of the laser cladding spray head and the shaft part is not more than 20 mm;
the second step is that: stretching a vibration probe of an ultrasonic vibration generator onto the shaft part and to be close to the crack position;
the third step: starting a laser and a powder feeder, feeding alloy powder into a laser cladding nozzle, and melting the alloy powder in the cladding nozzle to form molten liquid under the irradiation of laser speed;
the fourth step: firstly opening an ultrasonic vibration generator, then opening a laser cladding nozzle, cladding the melt at the crack position of the shaft part to form a cladding layer, and transmitting ultrasonic vibration to the cladding layer by a vibration probe of the ultrasonic vibration generator;
the fifth step: when the cladding layer completely fills the cracks and completely covers the surfaces of the cracks, closing the laser cladding nozzle, the laser lamp, the powder feeder and the ultrasonic vibration generator and stopping laser cladding;
and a sixth step: and after the cladding layer is solidified, carrying out fine grinding processing on the repaired position of the shaft part to restore the smooth and consistent contour of the surface.
Preferably, "horizontally clamping the shaft-like part" means that the shaft-like part is horizontally clamped on a rotating device which can drive the shaft-like part to rotate around a central axis, "arranging the laser cladding nozzle head above the crack position of the shaft-like part" means that the laser cladding nozzle head is arranged above the crack position of the shaft-like part through an axial moving device, and when the fourth step is performed, the laser cladding nozzle head is driven by the axial moving device to reciprocate axially directly above the shaft-like part and the shaft-like part is driven by the rotating device to reciprocate and rotate, so that a cladding layer is formed at the crack position of the shaft-like part.
Preferably, the moving speed of the laser cladding nozzle is 1.5mm/S, the single moving displacement of the laser cladding nozzle is 1-3 mm greater than the axial length of the crack, the liquid outlet flow rate of the laser cladding nozzle is 10L/min, and the opening time of the laser cladding nozzle is not more than 45 minutes.
Preferably, the reciprocating rotation angle of the shaft part is not more than 30 degrees, and the rotation speed of the shaft part is not more than 20 r/min.
Preferably, the power of the laser lamp is 2000W-4000W, the diameter of a light spot is about 4mm, the powder feeding flow rate of the powder feeder is 115-150g/min, and the particle size of the alloy powder is not more than 150 microns.
Preferably, the position of a vibration probe of the ultrasonic vibration generator on the shaft part is adjusted in real time in the cladding process, the vibration probe is not in contact with a cladding layer, and the vibration frequency of the ultrasonic vibration generator does not exceed 100 Hz.
The invention has the beneficial effects that:
the method for repairing the surface cracks of the shaft parts comprises the steps of detecting the crack depth of the shaft parts, directly scrapping the shaft parts if the crack depth of the shaft parts exceeds 500 micrometers, repairing the cracks with the depth not exceeding 100 micrometers by adopting a pulse current discharge method, and moving the pulse current to the tips of the cracks along crack surfaces when the pulse current flows through crack areas. The current density at the crack tip is extremely high, the temperature rise exceeding the melting point of the material can be obtained under the action of the joule heating effect, the extremely short current duration enables the crack tip to obtain a high temperature gradient and generate compressive stress, the crack surface is enabled to be attached to form a healing effect, the micro-cracks are effectively repaired, the crack expansion is inhibited, and the cracks are eliminated at the initial stage; for cracks with the depth of 100-500 microns, the laser cladding method is adopted for repairing, ultrasonic vibration is applied to the cladding layer during cladding, and the ultrasonic vibration is introduced in the laser cladding process, so that residual micro bubbles in a molten pool can be effectively vibrated, grains of the cladding layer are refined, the grains in the cladding layer are distributed more uniformly, the compactness is higher, the cladding quality is higher, and the reliability and effectiveness of crack repair are higher.
When the cracks with the depth of 100-500 micrometers are repaired, the shaft parts rotate, the laser cladding nozzle does axial reciprocating motion, the laser cladding nozzle and the shaft parts move and are combined to form a cladding layer which is similar to a rectangle on the surface of the shaft parts, so that the cracks are effectively filled by the cladding layer, the cladding layer forms a regular and compact shape on the surface of the shaft parts, and the repairing effectiveness and reliability are further ensured.
Detailed Description
The following describes embodiments of the present invention in detail.
The method for repairing the surface cracks of the shaft parts is characterized by comprising the following steps: firstly, cleaning a shaft part, carrying out flaw detection to detect the depth of cracks of the shaft part, repairing the shaft part if the detected depth of the cracks is not more than 500 micrometers, and otherwise, carrying out scrapping treatment; then repairing cracks of the shaft parts with the crack depth not more than 100 micrometers by a pulse current discharge method, repairing the shaft parts with the crack depth between 100 micrometers and 500 micrometers by a laser cladding method, and applying ultrasonic vibration to the cladding layer during cladding.
According to the method for repairing the surface cracks of the shaft parts, the crack depth of the shaft parts is detected, the shaft parts are directly scrapped if the crack depth of the shaft parts exceeds 500 micrometers, the cracks with the depth not exceeding 100 micrometers are repaired by adopting a pulse current discharge method, and when pulse current flows through a crack area, the pulse current moves to the tips of the cracks along crack surfaces. The current density at the crack tip is extremely high, the temperature rise exceeding the melting point of the material can be obtained under the action of the joule heating effect, the extremely short current duration enables the crack tip to obtain a high temperature gradient and generate compressive stress, the crack surface is enabled to be attached to form a healing effect, the micro-cracks are effectively repaired, the crack expansion is inhibited, and the cracks are eliminated at the initial stage; for cracks with the depth of 100-500 microns, the laser cladding method is adopted for repairing, ultrasonic vibration is applied to the cladding layer during cladding, and the ultrasonic vibration is introduced in the laser cladding process, so that residual micro bubbles in a molten pool can be effectively vibrated, grains of the cladding layer are refined, the grains in the cladding layer are distributed more uniformly, the compactness is higher, the cladding quality is higher, and the reliability and effectiveness of crack repair are higher.
Wherein, the step of repairing cracks of shaft parts with crack depth not more than 100 microns by pulse current discharge method refers to that the shaft parts are connected to two ends of an external circuit of a pulse current discharge device, and the pulse current density is adjusted to be 20-40A/mm2The pulse frequency is 200Hz, the single discharge time is 2-5 minutes, and the cracks on the shaft parts are repaired by multiple discharges. The discharge time is controlled to be 2-5 minutes each time, the current density is not too large, the temperature rise of parts is avoided from being over-limited, repeated discharge is carried out for multiple times, the repair of cracks of the shaft parts, which are not more than 100 micrometers, is completed, the microcracks are effectively repaired, the crack expansion is inhibited, and the cracks are eliminated at the initial stage.
The method for repairing the shaft part with the crack depth of 100-500 micrometers by using the laser cladding method and applying ultrasonic vibration to the cladding layer during cladding specifically comprises the following steps:
the first step is as follows: horizontally clamping the shaft part, arranging a laser cladding spray head above the crack position of the shaft part, arranging a laser lamp and a powder feeder for conveying alloy powder into the laser cladding spray head on the laser cladding spray head, wherein the vertical gap between the nozzle end of the laser cladding spray head and the shaft part is not more than 20mm, conveying the alloy powder into the laser cladding spray head at a constant speed by the powder feeder, melting the powder in the cladding spray head into molten liquid by laser beams generated by the laser lamp, and quickly dropping the molten liquid into the crack position of the shaft part after the cladding spray head is opened;
the second step is that: the method comprises the following steps that a vibration probe of an ultrasonic vibration generator extends into a shaft part and is close to a crack position, the vibration probe of the ultrasonic vibration generator transmits vibration to the shaft part, when molten liquid enters the crack to form a molten pool, the ultrasonic vibration is transmitted into the molten pool, tiny bubbles of the molten pool are effectively vibrated out, the grain size of the molten liquid is refined, the density of a cladding layer is effectively improved, and the reliability of repair is improved;
the third step: starting a laser and a powder feeder, feeding alloy powder into a laser cladding nozzle, and melting the alloy powder in the cladding nozzle to form molten liquid under the irradiation of laser speed;
the fourth step: the ultrasonic vibration generator is firstly opened, then the laser cladding nozzle is opened, the melt is cladded at the crack position of the shaft part to form a cladding layer, the vibration probe of the ultrasonic vibration generator transmits ultrasonic vibration to the cladding layer, the ultrasonic vibration generator is firstly opened, the melt is in an ultrasonic vibration state when being cladded on the shaft part, the melt can be accelerated to flow along the deep part of the crack, the effective filling of the melt on the crack is ensured to form a molten pool, and simultaneously, the residual micro bubbles in the melt are vibrated out and the grain size of the cladding layer is improved, so that the compactness of the cladding layer is improved, and the reliability of repair is improved;
the fifth step: when the cladding layer completely fills the cracks and completely covers the surfaces of the cracks, closing the laser cladding nozzle, the laser lamp, the powder feeder and the ultrasonic vibration generator and stopping laser cladding;
and a sixth step: and after the cladding layer is solidified, carrying out fine grinding processing on the repaired position of the shaft part to restore the smooth and consistent contour of the surface.
The fourth step is carried out by driving the laser cladding nozzle to reciprocate axially above the shaft part under the driving of the axial moving device and driving the shaft part to reciprocate and rotate under the driving of the rotating device, so that a cladding layer is formed at the crack position of the shaft part. During repair, the shaft part rotates, the laser cladding nozzle performs axial reciprocating motion, the laser cladding nozzle and the laser cladding nozzle are combined in motion to form a cladding layer similar to a rectangle on the surface of the shaft part, so that cracks are effectively filled by the cladding layer, the cladding layer forms a regular and compact shape on the surface of the shaft part, and the effectiveness and reliability of repair are further guaranteed.
The moving speed of the laser cladding nozzle is 1.5mm/S, the single moving displacement of the laser cladding nozzle is 1-3 mm larger than the axial length of the crack, the liquid outlet flow rate of the laser cladding nozzle is 10L/min, and the opening time of the laser cladding nozzle is not more than 45 minutes. The axial movement of the laser cladding nozzle and the rotation of the shaft parts enable the melt to form a spiral covering track at the crack position, the laser cladding nozzle moves in the reciprocating axial direction, the melt forms a symmetrical and crossed spiral covering track at the crack position, the melt is ensured to completely fill the crack position and effectively cover the surface of the crack position through the fluidity of the melt, a cladding layer is formed, and the effectiveness and the reliability of filling and covering the crack are higher.
The reciprocating rotation angle of the shaft parts is not more than 30 degrees, and the rotation speed of the shaft parts is not more than 20 r/min. The small-angle reciprocating rotation of the shaft parts ensures that the molten liquid just falls into the crack positions of the shaft parts.
Wherein the power of the laser lamp is 2000W-4000W, the diameter of the light spot is about 4mm, the powder feeding flow rate of the powder feeder is 115-150g/min, and the granularity of the alloy powder is not more than 150 microns. The flowing speed of the molten liquid in the laser cladding nozzle is adjusted by adjusting the powder feeding flow speed of the powder feeder and the power of the laser lamp, so that the phenomenon that the liquid outlet speed of the laser cladding nozzle is too high or too low to influence the covering effect is avoided.
The position of a vibration probe of the ultrasonic vibration generator on the shaft part is adjusted in real time in the cladding process, the vibration probe is not in contact with a cladding layer, and the vibration frequency of the ultrasonic vibration generator does not exceed 100 Hz. The vibration probe of the ultrasonic vibration generator transmits ultrasonic vibration to the molten pool, vibrates residual micro bubbles in the molten pool, refines the grain size of the molten liquid, enables the formed cladding layer to be more compact and compact, and adjusts the position of the vibration probe in real time in the cladding process so as to prevent the molten liquid from directly contacting with the vibration probe to damage the probe.
In the above, the technical solutions of the embodiments of the present invention are fully described, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Claims (8)
1. The method for repairing the surface cracks of the shaft parts is characterized by comprising the following steps: firstly, cleaning a shaft part, carrying out flaw detection to detect the depth of cracks of the shaft part, repairing the shaft part if the detected depth of the cracks is not more than 500 micrometers, and otherwise, carrying out scrapping treatment; then repairing cracks of the shaft parts with the crack depth not more than 100 micrometers by a pulse current discharge method, repairing the shaft parts with the crack depth between 100 micrometers and 500 micrometers by a laser cladding method, and applying ultrasonic vibration to the cladding layer during cladding.
2. The method for repairing the surface cracks of the shaft parts according to claim 1, wherein the method comprises the following steps: the method for repairing cracks of shaft parts with crack depths not more than 100 micrometers by using the pulse current discharge method is characterized in that the shaft parts are connected to two ends of an external circuit of a pulse current discharge device, and the pulse current density is adjusted to be 20-40A/mm2The pulse frequency is 200Hz, the single discharge time is 2-5 minutes, and the cracks on the shaft parts are repaired by multiple discharges.
3. The method for repairing the surface cracks of the shaft parts according to claim 1, wherein the method comprises the following steps: the method for repairing the shaft part with the crack depth of 100-500 micrometers by using the laser cladding method and applying ultrasonic vibration to the cladding layer during cladding specifically comprises the following steps:
the first step is as follows: horizontally clamping the shaft part, arranging a laser cladding spray head above the crack position of the shaft part, arranging a laser lamp and a powder feeder for conveying alloy powder into the laser cladding spray head on the laser cladding spray head, wherein the vertical gap between the nozzle end of the laser cladding spray head and the shaft part is not more than 20 mm;
the second step is that: stretching a vibration probe of an ultrasonic vibration generator onto the shaft part and to be close to the crack position;
the third step: starting a laser and a powder feeder, feeding alloy powder into a laser cladding nozzle, and melting the alloy powder in the cladding nozzle to form molten liquid under the irradiation of laser speed;
the fourth step: firstly opening an ultrasonic vibration generator, then opening a laser cladding nozzle, cladding the melt at the crack position of the shaft part to form a cladding layer, and transmitting ultrasonic vibration to the cladding layer by a vibration probe of the ultrasonic vibration generator;
the fifth step: when the cladding layer completely fills the cracks and completely covers the surfaces of the cracks, closing the laser cladding nozzle, the laser lamp, the powder feeder and the ultrasonic vibration generator and stopping laser cladding;
and a sixth step: and after the cladding layer is solidified, carrying out fine grinding processing on the repaired position of the shaft part to restore the smooth and consistent contour of the surface.
4. The method for repairing the surface cracks of the shaft parts as claimed in claim 3, wherein: the step four is carried out, wherein the laser cladding nozzle is driven by the axial moving device to reciprocate axially above the shaft part, and the shaft part is driven by the rotating device to reciprocate and rotate, so that a cladding layer is formed at the crack position of the shaft part.
5. The method for repairing the surface cracks of the shaft parts as claimed in claim 4, wherein the method comprises the following steps: the moving speed of the laser cladding nozzle is 1.5mm/S, the single moving displacement of the laser cladding nozzle is 1-3 mm larger than the axial length of the crack, the liquid outlet flow rate of the laser cladding nozzle is 10L/min, and the opening time of the laser cladding nozzle is not more than 45 minutes.
6. The method for repairing the surface cracks of the shaft parts as claimed in claim 5, wherein: the reciprocating rotation angle of the shaft parts is not more than 30 degrees, and the rotation speed of the shaft parts is not more than 20 r/min.
7. The method for repairing the surface cracks of the shaft parts as claimed in claim 3, wherein: the power of the laser lamp is 2000W-4000W, the diameter of a light spot is about 4mm, the powder feeding flow rate of the powder feeder is 115-150g/min, and the granularity of the alloy powder is not more than 150 microns.
8. The method for repairing the surface cracks of the shaft parts as claimed in claim 3, wherein: the position of a vibration probe of the ultrasonic vibration generator on the shaft part is adjusted in real time in the cladding process, the vibration probe is not in contact with a cladding layer, and the vibration frequency of the ultrasonic vibration generator does not exceed 100 Hz.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111306009.1A CN114150307A (en) | 2021-11-05 | 2021-11-05 | Method for repairing surface cracks of shaft parts |
| PCT/CN2021/136003 WO2023077606A1 (en) | 2021-11-05 | 2021-12-07 | Method for repairing surface cracks of shaft parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111306009.1A CN114150307A (en) | 2021-11-05 | 2021-11-05 | Method for repairing surface cracks of shaft parts |
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| CN114150307A true CN114150307A (en) | 2022-03-08 |
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| CN202111306009.1A Pending CN114150307A (en) | 2021-11-05 | 2021-11-05 | Method for repairing surface cracks of shaft parts |
Country Status (2)
| Country | Link |
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| CN (1) | CN114150307A (en) |
| WO (1) | WO2023077606A1 (en) |
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| CN114686718A (en) * | 2022-05-31 | 2022-07-01 | 太原理工大学 | Laser additive manufacturing AlCoCrFeNi2Eutectic high-entropy alloy and strengthening method thereof |
| CN114959690A (en) * | 2022-06-08 | 2022-08-30 | 绍兴昌杰机械有限公司 | Method and equipment for repairing mold crack |
| CN115141928A (en) * | 2022-07-14 | 2022-10-04 | 电子科技大学 | Electromagnetic toughening method and system for shaft type solid part |
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Inventor after: Shen Zheng Inventor after: Yang Min Inventor after: Zhou Wei Inventor after: Tang Zimou Inventor after: Ling Weisong Inventor after: Chen Bo Inventor after: Chen Zhiquan Inventor after: Tang Liming Inventor after: Ji Dongsheng Inventor after: Wang Jibin Inventor before: Shen Zheng Inventor before: Tang Zimou Inventor before: Chen Bo Inventor before: Tang Liming Inventor before: Wang Jibin Inventor before: Yang Min |
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