CN111172531A - Alternating magnetic field auxiliary laser remanufacturing device under inclination angle - Google Patents
Alternating magnetic field auxiliary laser remanufacturing device under inclination angle Download PDFInfo
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- CN111172531A CN111172531A CN202010094121.2A CN202010094121A CN111172531A CN 111172531 A CN111172531 A CN 111172531A CN 202010094121 A CN202010094121 A CN 202010094121A CN 111172531 A CN111172531 A CN 111172531A
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
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- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 14
- 229910052751 metal Inorganic materials 0.000 abstract description 14
- 239000007787 solid Substances 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- 230000008569 process Effects 0.000 description 10
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- 238000005336 cracking Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
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- 230000009471 action Effects 0.000 description 4
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- 230000005484 gravity Effects 0.000 description 3
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- 238000002844 melting Methods 0.000 description 3
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
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- 239000002344 surface layer Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
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- 238000001125 extrusion Methods 0.000 description 1
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- 230000003993 interaction Effects 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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Abstract
The alternating magnetic field auxiliary laser remanufacturing device under the inclination angle comprises a laser remanufacturing part, a magnetic field part and a movable clamp part; the movable clamp part comprises a cylindrical shell, a shell top plate, a shell bottom plate, a magnetic field part fixing support plate, a laser head fixing support plate, an arc-shaped handle, a roller support and a roller. The laser reproducing part comprises a laser, a laser transmission channel and a laser head, the laser is connected with the laser head through the laser transmission channel, a wire feeding head is coaxially arranged on the laser head, and the laser head penetrates through a round hole in a laser head fixing support plate and is fixed through a vertical baffle on the laser head fixing support plate; the magnetic field part comprises a medium-frequency alternating current power supply, a magnetic coil, a ferrite magnetic core and a power supply lead; the ferrite core is fixed by the vertical baffle of the magnetic field part fixing support plate. The invention reduces the temperature gradient at the molten pool by heating the solid metal around the molten pool through the alternating magnetic field and generates the supporting Lorentz force in the liquid molten pool to inhibit the molten pool melt from dripping.
Description
Technical Field
The invention belongs to the technical field of laser remanufacturing, and particularly relates to an alternating magnetic field auxiliary laser remanufacturing device under an inclined angle.
Background
A laser remanufacturing technology is taken as one of advanced remanufacturing technologies, a laser cladding technology is mainly taken as a core technology to realize repair remanufacturing of a part failure area, alloy powder is placed at a remanufacturing area to be repaired in a prefabricated powder or coaxial powder feeding mode, the powder and a small part of a base material surface layer are simultaneously melted through irradiation of a laser beam with certain intensity, the powder and the small part of the base material surface layer are firstly uniformly distributed on the surface of a part in a melting state, and then the part is rapidly solidified (10)2～106A technique for forming a cladding layer with low dilution rate, controllable thickness in a certain range and metallurgical bonding state with the base material on the surface of the base material in the process of DEG C/s).
In the laser remanufacturing process, a part is generally horizontally placed, a laser is positioned above the part, and a laser beam is vertically irradiated on the surface of the part. However, this method is only suitable for small parts whose positions are easy to adjust, and for large parts which cannot be easily moved, if the area to be repaired is located on the side wall of the part or on the upper inner wall, molten metal in a molten pool at the area to be repaired flows down or directly drops along the side wall under the action of gravity, so that an irregular-shaped repair layer is formed and the repair area is not complete; the comprehensive mechanical property of a part repairing area can be reduced, and meanwhile, the molten metal dropped down can not only damage laser equipment, but also threaten the personal safety of operators. In addition, in the laser repairing and remanufacturing process, the part remanufacturing area is rapidly heated under the action of laser and rapidly cooled under the condition of stopping laser irradiation. Large residual stresses may be generated in the part in the manufacturing area, easily causing cracking in the remanufacturing area of the part. The application of laser repair remanufacturing technology to large parts is greatly limited by the problems.
Disclosure of Invention
The invention provides an alternating magnetic field auxiliary laser remanufacturing device under an inclined angle, which aims to overcome the defects of the prior art.
The invention aims to solve the problem of molten metal dripping in the laser repair remanufacturing process of the side wall and the upper inner wall of the existing large part and the problem of cracking of a laser repair remanufacturing area in rapid heating and cooling.
The alternating magnetic field auxiliary laser remanufacturing device under the inclination angle comprises a laser remanufacturing part for remanufacturing a specific implementation part, a magnetic field part for providing a magnetic field for a remanufacturing part to be repaired, and a movable clamp part for fixing the relative position of the magnetic field part and the laser remanufacturing part and realizing the movement of the whole position.
But movable clamp part is equipped with shell roof, shell bottom plate respectively including the cylindrical shell that holds magnetic field portion and laser head, the upper end and the lower extreme of cylindrical shell, and the shell roof is equipped with and treats the rolling gyro wheel device in processing part surface, is equipped with the arc handle that makes things convenient for personnel to operate on the shell bottom plate, and top-down is equipped with the magnetic field portion fixed stay board of fixed stay ferrite core, the laser head fixed stay board of fixed stay laser head in proper order in the cylindrical shell.
The center of the top plate of the shell is provided with a round hole, the side wall of the cylindrical shell is provided with an upper arch door hole and a lower arch door hole in the same vertical direction, and the magnetic coil and the laser transmission channel penetrate out of the two arch door holes. Magnetic field portion fixed stay board comprises first support plectane and the first vertical baffle that is provided with central round hole, and first support plectane and the perpendicular fixed connection of first vertical baffle, and first support plectane external diameter equals with cylindrical shell inner chamber diameter, and the coaxial fixed setting of magnetic field fixed stay board is in cylindrical shell inner chamber.
Laser head fixed stay board comprises second supporting circular plate and the vertical baffle of second that is provided with central round hole, and the perpendicular fixed connection of second supporting circular plate and the vertical baffle of second, and second supporting circular plate external diameter equals with cylindrical shell inner chamber diameter, and the coaxial fixed setting of laser head fixed stay board is in cylindrical shell inner chamber.
The laser remanufacturing part comprises a laser, a laser transmission channel and a laser head, the laser is connected with the laser head arranged along the central axis through the laser transmission channel, a wire feeding head is coaxially arranged on the laser head, laser is conducted along the axis of the laser head in an annular light spot shape, wires are conveyed in an annular light spot hollow along the axis of the laser head, the annular light spot is gradually reduced upwards along the axis of the laser head, and the annular light spot is converged with the wires at a laser focus.
The magnetic field part comprises a medium-frequency alternating current power supply, a magnetic coil and a ferrite magnetic core. The ferrite magnetic core is composed of two arc-shaped ferrites with mutually isolated end surfaces, and a magnetic coil is embedded in the ferrite magnetic core. The magnetic coil is connected with the positive and negative ends of the medium-frequency alternating current power supply through the input copper pipe, the output copper pipe and the power supply lead.
The central lines of the ferrite magnetic core, the laser head, the magnetic field part fixing support plate and the laser head fixing support plate are collinear with the central axis of the cylindrical shell.
The ferrite magnetic core is fixed through the vertical baffle of magnetic field portion fixed support board, the laser head passes the round hole on the laser head fixed support board, and the vertical baffle on the laser head fixed support board is installed to the laser head.
Furthermore, the roller is made of high-resistance and high-heat-resistance ceramic materials, so that induced current is prevented from being transmitted to the device through the roller, and meanwhile, the influence of the heat of a molten pool is reduced.
Furthermore, the magnetic supply coil is formed by connecting two arc coils wound in parallel along the vertical direction, the two arc coils are respectively embedded in the two arc ferrite bodies, and the two parallel connection points are respectively connected with the input copper pipe and the output copper pipe. The winding radiuses of the two arc-shaped coils are equal.
Further, the end face of the arc-shaped ferrite is rectangular.
Furthermore, an upper clamping groove and a lower clamping groove are formed in the side wall of the cylindrical shell, the top plate of the shell is matched and fixed through the upper clamping groove, and the cylindrical bottom plate is matched and fixed through the lower clamping groove; the bottom plate and the top plate can be detached to facilitate the installation of the magnetic field part and the laser head.
The invention heats the solid metal around the molten pool to reduce the temperature gradient at the molten pool through the electromagnetic induction action of the alternating magnetic field, and generates the support Lorentz force in the liquid molten pool to inhibit the molten pool melt from dropping under an inclined angle and stir the metal molten pool to break the slender needle-shaped structure of the molten pool, thereby obtaining the remanufactured coating with good appearance, fine grains and no cracks.
The method of the invention has the following advantages:
1. the invention introduces a non-contact alternating magnetic field into the laser repair remanufacturing process under the inclination angle so as to provide a support Lorentz force for the melt of the molten pool and reduce the tendency of the melt of the molten pool to drip and flow.
2. The size of the Lorentz force supported by the molten pool is controlled by changing the intensity and the frequency of the alternating magnetic field; so as to realize the supporting Lorentz force required by the non-dripping and flowing-down of molten pool liquid under different materials and different laser remanufacturing laser areas.
3. The Lorentz force generated in the molten pool under the alternating magnetic field contains partial rotational force, so that liquid metal in the molten pool can be stirred, the slender needle-shaped structure of a remanufacturing area is broken, crystal grains in the remanufacturing area are refined, and the comprehensive performance of the remanufacturing area is enhanced.
4. The movable platform can be manually controlled to adjust the action positions of the laser beam and the magnetic field through rolling of the roller, so that repair and remanufacture of different inclination angles, various shapes and different ranges can be realized; the operation is simple and practical, and the method is suitable for various field repairing and remanufacturing conditions.
5. The magnetic supply coil is formed by winding arc coils in parallel along the vertical direction, and can generate an alternating magnetic field in a remanufacturing area and a solid area at the periphery of a molten pool. Solid metal on the periphery of the molten pool is heated, so that the temperature gradient of a remanufacturing area is reduced, and the cracking tendency of the remanufacturing area of the part is effectively reduced.
6. The magnetic flux leakage can be effectively reduced and the utilization efficiency of the magnetic field is improved by adopting the mode that the magnetic coil is embedded into the ferrite core
7. The invention has wide material application range and can be used for various metal materials with good electric conduction.
8. The invention has wide available processing forms, is not only suitable for the laser remanufacturing process, but also suitable for the processing processes of welding, laser melting and the like which generate a molten pool.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a front view of the present invention.
Fig. 3 is a schematic view of the structure of the magnetic field portion of the present invention.
Figure 4 is a schematic diagram of the magnetic supply coil structure of the present invention.
Fig. 5 is a schematic structural view of the magnetic field fixing support plate of the present invention.
Fig. 6 is a schematic structural view of the laser head fixing support plate of the present invention.
Fig. 7 is a schematic view of the cylindrical housing structure of the present invention.
Fig. 8 is a schematic view of the top plate structure of the housing of the present invention.
Fig. 9 is a schematic diagram of the operation of the present invention.
Detailed Description
The alternating magnetic field auxiliary laser remanufacturing device under the inclination angle comprises a laser remanufacturing part for specifically remanufacturing a part, a magnetic field part for providing a magnetic field for the remanufacturing part 100 to be repaired, and a movable clamp part for fixing the relative position of the magnetic field part and the laser remanufacturing part and realizing the movement of the whole position.
But movable clamp portion is including the cylindrical shell 203 who holds magnetic field portion and laser head, and the upper and lower end of cylindrical shell 203 is equipped with shell roof 201, shell bottom plate 205 respectively, is equipped with on the shell roof 201 to be used for waiting to process the rolling gyro wheel device in part surface, is equipped with the arc handle 206 that makes things convenient for personnel to operate on the shell bottom plate 205, and top-down is equipped with the magnetic field portion fixed stay board 202 that is used for fixed support ferrite core 402, is used for the laser head fixed stay board 204 of fixed support laser head 301 in proper order in the cylindrical shell 203.
A circular hole 2013 is formed in the center of the top plate 201 of the cylindrical shell, and an upper arch hole 2033 and a lower arch hole 2034 are formed in the side wall of the cylindrical shell 203 in the same vertical direction. The arc-shaped handle 206 is fixedly arranged on the cylindrical shell bottom plate 205.
3 roller support columns 2011 of the roller device are fixed on the top plate 201 of the shell according to an equilateral triangle by taking the circle center of the top plate 201 of the shell as the center, the rollers 2012 are rotatably arranged on the roller support columns 2011,
the magnetic field fixing support plate 202 is composed of a first support circular plate 2021 provided with a central circular hole and a first vertical baffle 2022, the first support circular plate 2021 is vertically and fixedly connected with the first vertical baffle 2022, the outer diameter of the first support circular plate 2021 is equal to the diameter of the inner cavity of the first cylindrical shell 203, and the magnetic field fixing support plate 202 is coaxially and fixedly arranged in the inner cavity of the cylindrical shell 203.
Laser head fixed support plate 204 comprises second support plectane 2041 and the vertical baffle 2042 of second that is provided with central round hole, and the perpendicular fixed connection of second support plectane 2041 and the vertical baffle 2042 of second, second support plectane 2041 external diameter equals with cylindrical shell 203 inner chamber diameter, the coaxial fixed setting of laser head fixed support plate 204 is in cylindrical shell 203 inner chamber.
Laser remanufacturing portion includes laser instrument, laser transmission passageway 302, laser head 301, and the laser instrument passes through laser transmission passageway 302 and links to each other with laser head 301 along the axis setting, and coaxial being equipped with on laser head 301 send the silk head, and laser is annular light spot form and conducts along the laser head axis, and the silk material is carried along laser head 301 axis in annular light spot hollow, and the annular light spot upwards reduces gradually along laser head 301 axis to it assembles with the silk material to locate in laser focus.
The magnetic field part comprises a medium-frequency alternating current power supply 406, a magnetic supply coil 401 and a ferrite core 402. The ferrite core 402 is formed by two arc-shaped ferrites which are separated by a certain distance, and the magnetic coil 401 is embedded in the ferrite core 402. The magnetic coil 401 is connected to the positive and negative terminals of a medium frequency ac power supply 406 via an input copper tube 403, an output copper tube 404, and a power supply lead 405.
The roller 2012 is made of a ceramic material with high resistance and high heat resistance, so as to prevent induced current from being transmitted to the device through the roller and reduce the influence of the heat of the molten pool on the roller.
The magnetic supply coil 401 is formed by connecting two arc coils wound in parallel in the vertical direction, the two arc coils are respectively embedded in two arc ferrite bodies, and the two parallel connection points are respectively connected with an input copper pipe 403 and an output copper pipe 404. And the winding radiuses of the front arc-shaped coil and the rear arc-shaped coil are equal.
The ferrite core 402 is composed of two arc-shaped ferrite cores separated by a certain distance, the radian of each arc-shaped ferrite is 180 degrees, and two opposite end faces of the two arc-shaped ferrites are rectangular.
The central lines of the ferrite core 402, the laser head 301, the magnetic field part fixing support plate 202 and the laser head fixing support plate 204 are all collinear with the rotation central axis of the cylindrical shell 203.
The ferrite core 402 is fixed by a vertical baffle 2022 of the magnetic field part fixing support plate 202, the laser head 301 passes through a circular hole on the laser head fixing support plate 204, and the laser head 301 is fixed by a vertical baffle 2042 on the laser head fixing support plate 204; the arc-shaped handle 206 is controlled to control the movable clamp part to move so as to drive the magnetic field part and the laser head 301 to move.
An upper clamping groove 2031 and a lower clamping groove 2032 are formed in the side wall of the cylindrical shell 203, the cylindrical shell top plate 201 is fixed in a matched mode through the upper clamping groove 2031, and the cylindrical bottom plate 205 is fixed in a matched mode through the lower clamping groove 2032; the base plate 201 and the top plate 205 may be removable to facilitate mounting of the magnetic field portion to the laser head 301.
The using method of the invention comprises the following steps:
firstly, the area to be repaired of the part is polished by abrasive paper, then the workpiece is cleaned by absolute ethyl alcohol or acetone to remove oil stains, and the workpiece is naturally dried by air or dried by a blower
Then, the roller is pressed on the surface of the part to be repaired by controlling the handheld movable platform; adjusting the focal length of the laser head to converge laser spots on the surface of the part, controlling the handheld movable clamp part to drive the roller to roll to align the laser beam with the initial point of the area to be repaired
Opening the medium-frequency alternating current power switch, adjusting the current and the frequency according to the material property of the part to be repaired and the range of the area to be repaired, and generating a proper alternating magnetic field in the area to be repaired and the surrounding solid metal
Then selecting proper shielding gas, gas flow and laser technological parameters, starting the shielding gas and the laser to irradiate the laser beam on the area to be repaired, and simultaneously feeding metal material into the area to be repaired through the wire feeder
According to the position and the size of a part remanufacturing area, the movable platform is manually adjusted to control the movement of the laser beam and the magnetic field acting area, and the whole to-be-repaired area of the part is repaired and remanufactured.
And finally, turning off the laser, and cutting off the alternating current to finish the laser repairing and remanufacturing work.
The specific working principle of the method is as follows:
the device of the invention applies alternating magnetic field at the periphery of the molten pool and in the area of the molten pool, so that induced current is generated in solid metal at the periphery of the molten pool and molten metal in the molten pool. Lorentz force F is formed in the molten pool under the interaction of induced current and alternating magnetic field in the molten metal of the molten poolL. According to maxwell's system of equations:
where J is the current density (vector), B is the magnetic flux density (vector), μ is the permeability of the material (scalar quantity), and F1Is electromagnetic without rotating force, F2Is electromagnetic without rotating force
Lorentz force FLFrom F1、F2Composition in which the electromagnetism has a spin force F1The conductive molten metal in the molten pool is driven to rotate, so that the stirring effect is achieved; electromagnetic non-rotary force F2The electromagnetic non-rotating force direction is from a strong magnetic field area to a weak magnetic field area, and the electromagnetic extrusion or electromagnetic suspension effect is achieved. And F1And F2Ratio of (c) | f1/f2|＝δma/L, formula ofDepth of skin
Representing the penetration depth of the alternating magnetic field in the molten pool; f is the frequency of the alternating magnetic field; mu is the magnetic conductivity of the material; sigma is the material conductivity; l is the characteristic length of the formed molten pool and is related to the cross-sectional area of the molten pool. Generally, with the determination of the part repair remanufacturing area, the characteristic length of the molten pool is fixed. And once the material is determined, the magnetic permeability and the electric conductivity of the material are also determined. The ratio of the electromagnetic rotary force to the electromagnetic non-rotary force in the molten bath is only related to the frequency of the applied alternating magnetic field. The higher the frequency, the greater the specific gravity of the electromagnetic nonrotating force (providing a source of supporting lorentz forces), the greater the gravitational force it can resist.
The work condition of the remanufactured part to be repaired is shown in fig. 9, a dotted double-headed arrow in the figure represents an alternating magnetic field with a direction changing periodically, a region x is a part repairing and remanufacturing region, and a region x is a solid region heated by induction. When the device disclosed by the invention is adopted to generate an alternating magnetic field with higher frequency (1-20 KHz), larger electromagnetic non-rotational force can be provided in a part repairing and remanufacturing area (X area) to resist the gravity of molten pool melt, so that the molten pool melt does not drip down in the laser repairing and remanufacturing process at an inclined angle; meanwhile, the alternating magnetic field not only acts on a part repairing and remanufacturing area (multiplied by area) in the center of the magnetic core, but also more solid areas (multiplied by area) on the periphery of the molten pool, which are gathered between the opposite surfaces of the two arc-shaped magnetic cores. According to the induction heating principle, solid metal on the periphery of the molten pool between the opposite surfaces of the two arc magnetic cores is gradually heated, the temperature of molten metal in the molten pool is not continuously increased but is kept unchanged in melting point temperature, so that the temperature gradient near the molten pool can be effectively reduced, and the cracking tendency of a part remanufacturing area is reduced.
Meanwhile, part of electromagnetic rotating force F1 in the molten pool area can play a role in stirring the molten pool, so that the solute of the molten pool is uniformly distributed, the temperature gradient at the interface of the molten pool is reduced, and the coarsening and the cracking of crystal grains at the section caused by the overlarge temperature gradient and the stress are inhibited. And in the molten pool melt stirring process, a slender needle-shaped structure can be broken, the grain size of a remanufacturing area is refined, and the comprehensive mechanical property of a repairing and remanufacturing area is improved.
And for the conditions of different materials, different remanufacturing areas and different angles, the amplitude and the frequency of the alternating magnetic field can be changed to regulate and control the Lorentz force (electromagnetic non-rotating force) borne by the melt of the molten pool and the heating quantity of surrounding solids, so that the part repairing and remanufacturing under different conditions can be realized.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (5)
1. The alternating magnetic field auxiliary laser remanufacturing device under the inclination angle comprises a laser remanufacturing part for specifically remanufacturing a part, a magnetic field part for providing a magnetic field for the remanufacturing part to be repaired, and a movable clamp part for fixing the relative position of the magnetic field part and the laser remanufacturing part and realizing the movement of the whole position;
the movable clamp part comprises a cylindrical shell for accommodating the magnetic field part and the laser head, the upper end and the lower end of the cylindrical shell are respectively provided with a shell top plate and a shell bottom plate, the shell top plate is provided with a roller device rolling on the surface of a part to be processed, the shell bottom plate is provided with an arc-shaped handle convenient for personnel to operate, and the cylindrical shell is internally provided with a magnetic field part fixed supporting plate for fixedly supporting the ferrite core and a laser head fixed supporting plate for fixedly supporting the laser head from top to bottom in sequence;
a circular hole is formed in the center of the top plate of the shell, an upper arched door hole and a lower arched door hole are formed in the side wall of the cylindrical shell in the same vertical direction, and the magnetic coil and the laser transmission channel penetrate out of the two arched door holes;
the magnetic field part fixing support plate consists of a first support circular plate and a first vertical baffle, the first support circular plate is provided with a central circular hole, the first support circular plate is vertically and fixedly connected with the first vertical baffle, the outer diameter of the first support circular plate is equal to the diameter of the inner cavity of the cylindrical shell, and the magnetic field part fixing support plate is coaxially and fixedly arranged in the inner cavity of the cylindrical shell;
the laser head fixing support plate is composed of a second support circular plate and a second vertical baffle, the second support circular plate is provided with a central circular hole, the second support circular plate is vertically and fixedly connected with the second vertical baffle, the outer diameter of the second support circular plate is equal to the diameter of the inner cavity of the cylindrical shell, and the laser head fixing support plate is coaxially and fixedly arranged in the inner cavity of the cylindrical shell;
the laser reproducing part comprises a laser, a laser transmission channel and a laser head, the laser is connected with the laser head arranged along the central axis through the laser transmission channel, a wire feeding head is coaxially arranged on the laser head, the laser is transmitted along the axis of the laser head in an annular light spot shape, wires are conveyed in an annular light spot hollow along the axis of the laser head, and the annular light spot is gradually reduced upwards along the axis of the laser head and is converged with the wires at a laser focus;
the magnetic field part comprises a medium-frequency alternating current power supply, a magnetic coil and a ferrite magnetic core; the ferrite magnetic core is composed of two arc ferrites with mutually isolated end surfaces, and a magnetic coil is embedded in the ferrite magnetic core; the magnetic coil is connected with the positive and negative ends of the medium-frequency alternating current power supply through an input copper pipe, an output copper pipe and a power supply lead;
the center lines of the ferrite magnetic core, the laser head, the magnetic field part fixing support plate and the laser head fixing support plate are collinear with the rotary central axis of the cylindrical shell;
the ferrite magnetic core is fixed through the vertical baffle of magnetic field portion fixed support board, the laser head passes the round hole on the laser head fixed support board, and the vertical baffle on the laser head fixed support board is installed to the laser head.
2. The alternating magnetic field assisted laser remanufacturing apparatus at an inclined angle according to claim 1, wherein: the roller is made of a ceramic material with high resistance and high heat resistance.
3. The alternating magnetic field assisted laser remanufacturing apparatus at an inclined angle according to claim 1, wherein: the magnetic supply coil is formed by connecting two arc coils wound in parallel along the vertical direction, the two arc coils are respectively embedded in the two arc ferrite bodies, the two parallel connection points are respectively connected with the input copper pipe and the output copper pipe, and the winding radiuses of the two arc coils are equal.
4. The alternating magnetic field assisted laser remanufacturing apparatus at an inclined angle according to claim 1, wherein: the end face of the arc ferrite is rectangular.
5. The alternating magnetic field assisted laser remanufacturing apparatus at an inclined angle according to claim 1, wherein: an upper clamping groove and a lower clamping groove are formed in the side wall of the cylindrical shell, the top plate of the shell is installed through the upper clamping groove, and the cylindrical bottom plate is installed through the lower clamping groove.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112795913A (en) * | 2020-12-28 | 2021-05-14 | 浙江工业大学 | Directional Lorentz force composite laser remanufacturing device based on medium-frequency alternating magnetic field |
| CN113102771A (en) * | 2021-04-09 | 2021-07-13 | 武汉理工大学 | In-situ laser additive repair method based on magnetic suspension principle |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007061830A (en) * | 2005-08-29 | 2007-03-15 | Toyota Auto Body Co Ltd | Welding apparatus |
| JP2010188350A (en) * | 2009-02-16 | 2010-09-02 | Mazda Motor Corp | Laser welding method and apparatus |
| JP2011206811A (en) * | 2010-03-30 | 2011-10-20 | Shibuya Kogyo Co Ltd | Method and device for forming bump |
| CN103741138A (en) * | 2013-12-31 | 2014-04-23 | 浙江工业大学 | Static magnetic field-laser coaxial composite fusion covering method and device |
| CN106624365A (en) * | 2017-01-21 | 2017-05-10 | 浙江工业大学 | Electromagnetic compound field synergetic laser remanufacturing device for turbine rotor shaft |
| CN106637203A (en) * | 2017-01-21 | 2017-05-10 | 浙江工业大学 | Electromagnetic complex field-synergistic type laser remanufacturing device for blades of steam turbine |
| CN106987838A (en) * | 2017-04-26 | 2017-07-28 | 华中科技大学 | Remove the laser cladding apparatus and method of laser cladding layer stomata/field trash |
| CN107868958A (en) * | 2017-12-01 | 2018-04-03 | 浙江工业大学 | A kind of brush electromagnetic complex field synchronization laser cladding apparatus of flexible adaptive composite carbon |
| CN108607993A (en) * | 2018-07-24 | 2018-10-02 | 浙江工业大学 | A kind of flux powder formula dust feeder for laser gain material manufacture |
| JP2019111552A (en) * | 2017-12-22 | 2019-07-11 | 日本特殊陶業株式会社 | Laser welding method |
| CN110202149A (en) * | 2019-07-03 | 2019-09-06 | 上海大学 | A kind of laser solid forming processing unit (plant) and method |
| CN211921696U (en) * | 2020-02-15 | 2020-11-13 | 杭州博华激光技术有限公司 | Alternating magnetic field auxiliary laser remanufacturing device under inclination angle |
-
2020
- 2020-02-15 CN CN202010094121.2A patent/CN111172531B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007061830A (en) * | 2005-08-29 | 2007-03-15 | Toyota Auto Body Co Ltd | Welding apparatus |
| JP2010188350A (en) * | 2009-02-16 | 2010-09-02 | Mazda Motor Corp | Laser welding method and apparatus |
| JP2011206811A (en) * | 2010-03-30 | 2011-10-20 | Shibuya Kogyo Co Ltd | Method and device for forming bump |
| CN103741138A (en) * | 2013-12-31 | 2014-04-23 | 浙江工业大学 | Static magnetic field-laser coaxial composite fusion covering method and device |
| CN106624365A (en) * | 2017-01-21 | 2017-05-10 | 浙江工业大学 | Electromagnetic compound field synergetic laser remanufacturing device for turbine rotor shaft |
| CN106637203A (en) * | 2017-01-21 | 2017-05-10 | 浙江工业大学 | Electromagnetic complex field-synergistic type laser remanufacturing device for blades of steam turbine |
| CN106987838A (en) * | 2017-04-26 | 2017-07-28 | 华中科技大学 | Remove the laser cladding apparatus and method of laser cladding layer stomata/field trash |
| CN107868958A (en) * | 2017-12-01 | 2018-04-03 | 浙江工业大学 | A kind of brush electromagnetic complex field synchronization laser cladding apparatus of flexible adaptive composite carbon |
| WO2019104942A1 (en) * | 2017-12-01 | 2019-06-06 | 浙江工业大学 | Flexible self-adaptive composite carbon brush-type electromagnetic composite field synchronous laser cladding device |
| JP2019111552A (en) * | 2017-12-22 | 2019-07-11 | 日本特殊陶業株式会社 | Laser welding method |
| CN108607993A (en) * | 2018-07-24 | 2018-10-02 | 浙江工业大学 | A kind of flux powder formula dust feeder for laser gain material manufacture |
| CN110202149A (en) * | 2019-07-03 | 2019-09-06 | 上海大学 | A kind of laser solid forming processing unit (plant) and method |
| CN211921696U (en) * | 2020-02-15 | 2020-11-13 | 杭州博华激光技术有限公司 | Alternating magnetic field auxiliary laser remanufacturing device under inclination angle |
Non-Patent Citations (2)
| Title |
|---|
| 王梁;胡勇;宋诗英;赖三聘;姚建华;: "稳态磁场辅助对激光熔凝层表面波纹的抑制作用研究", 中国激光, no. 11 * |
| 袁志峰: ""基于交变磁场辅助的激光熔凝气孔调控装置设计及实验研究"", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》, no. 8, pages 038 - 505 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112795913A (en) * | 2020-12-28 | 2021-05-14 | 浙江工业大学 | Directional Lorentz force composite laser remanufacturing device based on medium-frequency alternating magnetic field |
| CN112795913B (en) * | 2020-12-28 | 2022-12-09 | 浙江工业大学 | Directional Lorentz force composite laser remanufacturing device based on intermediate frequency alternating magnetic field |
| CN113102771A (en) * | 2021-04-09 | 2021-07-13 | 武汉理工大学 | In-situ laser additive repair method based on magnetic suspension principle |
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