CN111172531B - 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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- CN111172531B CN111172531B CN202010094121.2A CN202010094121A CN111172531B CN 111172531 B CN111172531 B CN 111172531B CN 202010094121 A CN202010094121 A CN 202010094121A CN 111172531 B CN111172531 B CN 111172531B
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- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 33
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- 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
- 230000033001 locomotion Effects 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 4
- 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 5
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 17
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- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
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- 239000010410 layer Substances 0.000 description 2
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- 238000010422 painting Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
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- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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- 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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- Optics & Photonics (AREA)
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- Materials Engineering (AREA)
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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 handle, a roller pillar and rollers. The laser remanufacturing part comprises a laser, a laser transmission channel and a laser head, wherein 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 supporting plate and is fixed through a vertical baffle plate in the laser head fixing supporting plate; the magnetic field part comprises an intermediate frequency alternating current power supply, a magnetic supply coil, a ferrite core and a power supply wire; the ferrite core is fixed by a vertical baffle plate of a magnetic field part fixing support plate. The invention reduces the temperature gradient at the molten bath by heating the solid metal around the molten bath with an alternating magnetic field and generates a supporting lorentz force in the liquid molten bath to inhibit molten bath melt 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
The laser remanufacturing technology is one of advanced remanufacturing technologies, which mainly uses a laser cladding technology as a core technology to repair and remanufacture a part failure area, wherein alloy powder is placed at the remanufacturing area to be repaired in a mode of prefabricating powder or coaxially feeding the powder, the powder and a small part of substrate surface layers are simultaneously melted through irradiation of a laser beam with certain intensity, firstly, the powder and a small part of substrate surface layers are uniformly distributed on the part surface in a molten state, and then the part surface layers are rapidly solidified (10 2 ～10 6 A technology for forming a cladding layer which has low dilution rate, controllable thickness within a certain range and is in metallurgical bonding state with the substrate on the surface of the substrate in the process of DEG C/s).
In the laser remanufacturing process, the part is typically placed horizontally, and the laser is positioned above the part and irradiates the surface of the part with a laser beam. However, the method is only suitable for small parts with easy position adjustment, and for large parts which cannot be moved easily, if the area to be repaired is positioned on the side wall of the part or on the upper inner wall of the part, molten metal in a molten pool at the area to be repaired can flow down or directly drip down along the side wall under the action of gravity, so that a repair layer with an irregular shape can be formed, and the repair area is incomplete; the comprehensive mechanical property of the part repair area can be reduced, and meanwhile, the molten metal which is dropped down can damage the laser equipment and threaten the personal safety of operators. In addition, in the laser repair remanufacturing process, since the part remanufacturing area is rapidly heated under the action of laser and rapidly cooled under stopping of laser irradiation. Larger residual stresses are generated in the part manufacturing area, which can easily cause cracking in the part remanufacturing area. The above problems have greatly limited the application of laser repair remanufacturing techniques to large parts.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an alternating magnetic field auxiliary laser remanufacturing device under an inclined angle.
The invention aims to solve the problems 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 cracking in the laser repair remanufacturing area in the rapid heating and cooling process.
The alternating magnetic field auxiliary laser remanufacturing device under the inclination angle comprises a laser remanufacturing part for carrying out part remanufacturing, a magnetic field part for providing a magnetic field for a part to be remanufactured, and a movable clamp part for fixing the relative positions of the magnetic field part and the laser remanufacturing part and realizing overall position movement.
The movable fixture part comprises a cylindrical shell for accommodating the magnetic field part and the laser head, wherein 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 handle convenient for personnel to operate, and the cylindrical shell is internally provided with a magnetic field part fixing support plate for fixedly supporting the ferrite core and a laser head fixing support plate for fixedly supporting the laser head from top to bottom.
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 hole and a lower arch hole in the same vertical direction, and the magnetic coil and the laser transmission channel penetrate out of the two arch holes. The magnetic field part fixed support plate comprises a first support circular plate provided with a central circular hole and a first vertical baffle plate, the first support circular plate is vertically and fixedly connected with the first vertical baffle plate, 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 fixed support plate is coaxially and fixedly arranged in the inner cavity of the cylindrical shell.
The laser head fixed support plate comprises a second supporting circular plate provided with a central circular hole and a second vertical baffle plate, the second supporting circular plate is vertically and fixedly connected with the second vertical baffle plate, the outer diameter of the second supporting circular plate is equal to the diameter of the inner cavity of the cylindrical shell, and the laser head fixed support plate is coaxially and fixedly arranged in the inner cavity of the cylindrical shell.
The laser remanufacturing part comprises a laser, a laser transmission channel and a laser head, wherein 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 in an annular light spot shape and is conducted along the axis of the laser head, a wire material is conveyed along the axis of the laser head in an annular light spot hollow structure, and the annular light spot is gradually reduced upwards along the axis of the laser head and is converged with the wire material at a laser focus.
The magnetic field part comprises an intermediate frequency alternating current power supply, a magnetic supply coil and a ferrite core. The ferrite core is composed of two arc-shaped ferrite with mutually isolated end faces, and the magnetic supply coil is embedded in the ferrite core. The magnetic supply 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 wire.
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 all collinear with the center line of the cylindrical shell.
Ferrite core passes through the vertical baffle of magnetic field portion fixed bolster fixed, the round hole in the laser head fixed bolster is passed to the laser head, and the vertical baffle in the laser head fixed bolster is installed to the laser head.
Furthermore, the roller is made of high-resistance and high-heat-resistance ceramic materials, so that the induction current is prevented from being transmitted to the device through the roller, and the influence of heat of a molten pool is reduced.
Further, the magnetic supply coil is formed by connecting two arc coils wound in the vertical direction in parallel, the two arc coils are respectively embedded in the two arc ferrites, and the two parallel connection nodes 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 ferrite is rectangular.
Further, an upper clamping groove and a lower clamping groove are formed in the side wall of the cylindrical shell, the shell top plate is fixed in a matched mode through the upper clamping groove, and the cylindrical bottom plate is fixed in a matched mode 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.
According to the invention, through the electromagnetic induction action of an alternating magnetic field, solid metal around a molten pool is heated to reduce the temperature gradient at the molten pool, and a supporting Lorentz force is generated in a liquid molten pool to inhibit molten pool melt dripping under a trend angle and a stirring metal molten pool from breaking a slender needle-shaped structure of the molten pool, so that a remanufactured coating with good appearance, fine grains and no cracks is obtained.
The method of the invention has the following advantages:
1. according to the invention, a non-contact alternating magnetic field is introduced into a laser repairing remanufacturing process under an inclined angle, so that a supporting Lorentz force is provided for molten pool melt, and the tendency of the molten pool melt to drop down is reduced.
2. The intensity and frequency of the alternating magnetic field are changed to control the intensity of Lorentz force supported by the molten pool; so as to realize the support Lorentz force required by the non-dripping flow of the molten pool liquid under the different materials and the different laser remanufacturing laser region sizes.
3. The Lorentz force generated in the molten pool under the alternating magnetic field contains partial rotation force, so that liquid metal in the molten pool can be stirred, the slender needle-shaped tissue of the remanufacturing area is broken, grains of the remanufacturing area are further 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 remanufacturing of different inclined angles, various shapes and different ranges of sizes can be realized; the operation is simple and practical, and the method is suitable for various on-site repair and remanufacturing conditions.
5. The magnetic supply coil is formed by winding arc coils in parallel along the vertical direction, and an alternating magnetic field can be generated in the remanufacturing area and the solid area at the periphery of the molten pool. The solid metal at the periphery of the molten pool is heated, so that the temperature gradient of the remanufacturing area is reduced, and the cracking tendency of the part remanufacturing area is effectively reduced.
6. The magnetic supply coil is embedded into the ferrite core, so that the magnetic leakage can be effectively reduced, and the magnetic field utilization efficiency is improved
7. The invention has wide range of usable materials and can be used for various metal materials with good electric conduction.
8. The invention has wide applicable processing forms, is not only suitable for the laser remanufacturing process, but also suitable for the processing process of producing a molten pool by welding, laser fusing and the like.
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 unit of the present invention.
Fig. 4 is a schematic diagram of the structure of the magnetic supplying coil of the present invention.
Fig. 5 is a schematic view of the structure of the magnetic field part fixing support plate of the present invention.
Fig. 6 is a schematic view of the structure 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 carrying out part remanufacturing, a magnetic field part for providing a magnetic field for a part 100 to be remanufactured, and a movable clamp part for fixing the relative positions of the magnetic field part and the laser remanufacturing part and realizing the whole position movement.
The movable fixture part comprises a cylindrical shell 203 for accommodating a magnetic field part and a laser head, a shell top plate 201 and a shell bottom plate 205 are respectively arranged at the upper end and the lower end of the cylindrical shell 203, a roller device for rolling the surface of a part to be processed is arranged on the shell top plate 201, an arc-shaped handle 206 convenient for personnel to operate is arranged on the shell bottom plate 205, and a magnetic field part fixing support plate 202 for fixedly supporting a ferrite magnetic core 402 and a laser head fixing support plate 204 for fixedly supporting the laser head 301 are sequentially arranged in the cylindrical shell 203 from top to bottom.
A circular hole 2013 is formed in the center of the cylindrical top plate 201 of the housing, and an upper arch hole 2033 and a lower arch hole 2034 are formed in the same vertical direction on the side wall of the cylindrical housing 203. The arc-shaped handle 206 is fixedly arranged on the cylindrical housing base plate 205.
The 3 roller pillars 2011 of the roller device are fixed on the shell top plate 201 by equilateral triangle with the center of the shell top plate 201 as the center, the rollers 2012 are rotatably arranged on the roller pillars 2011,
the fixed support plate 202 for the magnetic field part 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 fixedly connected with the first vertical baffle 2022 vertically, 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 fixed support plate 202 for the magnetic field is coaxially and fixedly arranged in the inner cavity of the cylindrical shell 203.
The laser head fixing support plate 204 is composed of a second supporting circular plate 2041 provided with a central circular hole and a second vertical baffle 2042, the second supporting circular plate 2041 is fixedly connected with the second vertical baffle 2042 vertically, the outer diameter of the second supporting circular plate 2041 is equal to the diameter of the inner cavity of the cylindrical shell 203, and the laser head fixing support plate 204 is coaxially and fixedly arranged in the inner cavity of the cylindrical shell 203.
The laser remanufacturing part comprises a laser, a laser transmission channel 302 and a laser head 301, wherein the laser is connected with the laser head 301 arranged along a central axis through the laser transmission channel 302, a wire feeding head is coaxially arranged on the laser head 301, laser is in an annular light spot shape and is conducted along the axis of the laser head, a wire material is conveyed along the axis of the laser head 301 in an annular light spot hollow structure, and the annular light spot is gradually reduced upwards along the axis of the laser head 301 and is converged with the wire material at a laser focus.
The magnetic field part comprises an intermediate frequency alternating current power supply 406, a magnetic supply coil 401 and a ferrite core 402. The ferrite core 402 is composed of two arc-shaped ferrites with a certain distance, and the magnetic supply coil 401 is embedded in the ferrite core 402. The magnetic supply coil 401 is connected with the positive and negative ends of the intermediate frequency alternating current power supply 406 through an input copper pipe 403, an output copper pipe 404 and a power wire 405.
The roller 2012 is made of a ceramic material with high resistance and high heat resistance so as to avoid the transmission of induced current to the device through the roller and reduce the influence of heat of a molten pool on the roller.
The magnetic supply coil 401 is formed by connecting two arc coils wound in the vertical direction in parallel, the two arc coils are respectively embedded in the two arc ferrites, and the two parallel connection nodes are respectively connected with the input copper pipe 403 and the 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 ferrite cores with a certain distance, the arc degree of the arc ferrite is 180 degrees, and two opposite end faces of the two arc ferrite cores are rectangular.
The center 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 center 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 round 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 handle 206 is controlled to control the moving 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 manner through the upper clamping groove 2031, and the shell bottom plate 205 is fixed in a matched manner through the lower clamping groove 2032; the housing top plate 201 and the housing bottom plate 205 can be detached to facilitate the installation of the magnetic field portion and the laser head 301.
The application method of the invention comprises the following steps:
firstly polishing the region to be repaired of the part by sand paper, cleaning the workpiece by absolute ethyl alcohol or acetone to remove greasy dirt, and naturally air-drying or drying by adopting 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 enable the laser spots to be converged on the surface of the part, and controlling the handheld movable clamp part to drive the roller to roll so as to enable the laser beams to be aligned with the initial point of the area to be repaired
Opening the medium-frequency alternating current power switch, and 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, so that a proper alternating magnetic field is generated in the area to be repaired and surrounding solid metal
Then selecting proper shielding gas, gas flow and laser process parameters, starting the shielding gas and the laser to irradiate the laser beam on the area to be repaired, and simultaneously feeding the metal material into the area to be repaired through the wire feeder
According to the position and the size of the part remanufacturing area, the movable platform is manually adjusted to control the movement of the laser beam and the magnetic field acting area, so that the repair remanufacturing of the whole part area to be repaired is realized.
And finally, turning off the laser, cutting off the alternating current, and completing the laser repairing and remanufacturing work.
The specific working principle of the method is as follows:
by applying alternating magnetic fields to the periphery of the molten pool and the molten pool area, the device of the invention can generate induced current in solid metal at the periphery of the molten pool and molten metal in the molten pool. Under the interaction of the induced current and the alternating magnetic field in the molten metal in the molten pool, the Lorentz force F is formed in the molten pool L . According to maxwell's equations:
wherein J is the current density (vector), B is the magnetic flux density (vector), μ is the magnetic permeability (scalar) of the material, F 1 Is electromagnetic without rotation force, F 2 Is electromagnetic without rotation force
Lorentz force F L From F 1 、F 2 Composition of electromagnetic torque F 1 The conductive molten metal in the molten pool is driven to make rotary motion, so that stirring effect is achieved; electromagnetic no-rotation force F 2 The electromagnetic non-rotation force direction is from the strong magnetic field area to the weak magnetic field area, and plays a role in electromagnetic extrusion or electromagnetic suspension. And F 1 And F is equal to 2 Ratio of |f 1 /f 2 |＝δ m Skin depth in/LIndicating the penetration depth of the alternating magnetic field in the molten pool; f is the frequency of the alternating magnetic field; mu is the materialMagnetic permeability; sigma is the conductivity of the material; l is the characteristic length of the formed melt pool and is related to the cross-sectional area of the melt pool. The characteristic length of the weld pool is typically fixed as part repair remanufacturing areas are determined. And once the material is determined, its permeability and conductivity are also determined. The ratio of the electromagnetic torque in the bath to the electromagnetic torque is then only dependent on the frequency of the applied alternating magnetic field. The higher the frequency, the greater the specific gravity of the electromagnetic no-spin force (providing a source of supporting lorentz forces) and the greater the gravity it can resist.
The working condition of the remanufactured part to be repaired is shown in fig. 9, wherein a dotted line double-headed arrow in the figure indicates an alternating magnetic field with a periodically changing direction, a painting x region is a part repairing remanufacturing region, and the painting x region is a solid region subjected to induction heating. When the device of the invention is adopted to generate an alternating magnetic field with higher frequency (1-20 KHz), larger electromagnetic non-rotation force can be provided in a part repair and remanufacturing area (X area) so as to resist the gravity of molten pool melt, thereby realizing the non-dripping flow of the molten pool melt in the laser repair and remanufacturing process under an inclined angle; meanwhile, the alternating magnetic field not only acts on the part repairing and remanufacturing area (x area) in the center of the magnetic core, but also gathers in the solid area (area) at the periphery of the molten pool between the opposite faces of the two circular arc magnetic cores. According to the induction heating principle, solid metal at the periphery of a molten pool between opposite surfaces of two circular arc magnetic cores can be gradually heated, and the temperature of molten metal in the molten pool in a molten state can not continuously rise but keeps the melting point temperature unchanged, 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 torque F1 existing 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 coarsening and cracking of grains at the cross section caused by excessive temperature gradient and stress are inhibited. In addition, during the stirring process of the molten pool melt, the slender needle-shaped tissue can be broken, so that the grain size of the remanufacturing area is thinned, and the comprehensive mechanical property of the remanufacturing area is improved.
And for the conditions of different materials, different remanufacturing areas and different angles, the magnitude of Lorentz force (electromagnetic non-rotation force) and the magnitude of surrounding solid heating amount borne by the molten pool melt can be regulated and controlled by changing the amplitude and frequency of the alternating magnetic field, so that the repair remanufacturing of parts under various different conditions is realized.
The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, but also equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.
Claims (5)
1. The alternating magnetic field auxiliary laser remanufacturing device under the inclination angle comprises a laser remanufacturing part for carrying out part remanufacturing, a magnetic field part for providing a magnetic field for a part to be remanufactured, and a movable clamp part for fixing the relative positions of the magnetic field part and the laser remanufacturing part and realizing the whole position movement;
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 which rolls on the surface of a part to be processed, the shell bottom plate is provided with an arc handle which is convenient for personnel to operate, and the cylindrical shell is internally provided with a magnetic field part fixing support plate for fixedly supporting the ferrite magnetic core and a laser head fixing support plate for fixedly supporting the laser head from top to bottom in sequence;
a round hole is formed in the center of the top plate of the shell, an upper arch hole and a lower arch hole are formed in the same vertical direction on the side wall of the cylindrical shell, and the magnetic coil and the laser transmission channel penetrate out of the two arch holes;
the magnetic field part fixing support plate consists of a first supporting circular plate provided with a central circular hole and a first vertical baffle, the first supporting circular plate is vertically and fixedly connected with the first vertical baffle, the outer diameter of the first supporting circular plate is equal to the diameter of the inner cavity of the cylindrical shell, and the magnetic field fixing support plate is coaxially and fixedly arranged in the inner cavity of the cylindrical shell;
the laser head fixing support plate consists of a second supporting circular plate provided with a central circular hole and a second vertical baffle, the second supporting circular plate is vertically and fixedly connected with the second vertical baffle, the outer diameter of the second supporting 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 remanufacturing part comprises a laser, a laser transmission channel and a laser head, wherein 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 in an annular light spot shape and is conducted along the axis of the laser head, the wire is conveyed along the axis of the laser head in an annular light spot hollow, and the annular light spot is gradually reduced upwards along the axis of the laser head and is converged with the wire at a laser focus;
the magnetic field part comprises an intermediate frequency alternating current power supply, a magnetic supply coil and a ferrite core; the ferrite core is composed of two arc-shaped ferrite with mutually isolated end faces, and the magnetic supply coil is embedded in the ferrite core; the magnetic supply 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 wire;
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 all collinear with the rotation center axis of the cylindrical shell;
ferrite core passes through the vertical baffle of magnetic field portion fixed bolster fixed, the round hole in the laser head fixed bolster is passed to the laser head, and the vertical baffle in the laser head fixed bolster is installed to the laser head.
2. An alternating magnetic field assisted laser remanufacturing apparatus at tilt angle according to claim 1 wherein: the roller is made of ceramic materials with high resistance and high heat resistance.
3. An alternating magnetic field assisted laser remanufacturing apparatus at tilt angle according to claim 1 wherein: the magnetic supply coil is formed by connecting two arc coils wound in the vertical direction in parallel, the two arc coils are respectively embedded in the two arc ferrites, the two parallel connection nodes 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. An alternating magnetic field assisted laser remanufacturing apparatus at tilt angle according to claim 1 wherein: the end face of the arc ferrite is rectangular.
5. An alternating magnetic field assisted laser remanufacturing apparatus at tilt 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 shell top plate is installed through the upper clamping groove, and the cylindrical bottom plate is installed through the lower clamping groove.
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| 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 |
| CN113102771B (en) * | 2021-04-09 | 2023-03-31 | 武汉理工大学 | In-situ laser additive repair method based on magnetic suspension principle |
| CN113996923B (en) * | 2021-11-03 | 2024-07-05 | 南京魔迪多维数码科技有限公司 | Magnetic suspension type laser cutting platform |
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