CN110079755B - Three-phase electromagnetic wiping device suitable for rod-shaped workpiece - Google Patents
Three-phase electromagnetic wiping device suitable for rod-shaped workpiece Download PDFInfo
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- CN110079755B CN110079755B CN201910470822.9A CN201910470822A CN110079755B CN 110079755 B CN110079755 B CN 110079755B CN 201910470822 A CN201910470822 A CN 201910470822A CN 110079755 B CN110079755 B CN 110079755B
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- 238000000576 coating method Methods 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 239000011248 coating agent Substances 0.000 claims abstract description 33
- 230000005291 magnetic effect Effects 0.000 claims abstract description 28
- 230000000694 effects Effects 0.000 claims abstract description 18
- 238000007747 plating Methods 0.000 claims abstract description 18
- 230000009471 action Effects 0.000 claims abstract description 8
- 238000005192 partition Methods 0.000 claims description 66
- 239000000498 cooling water Substances 0.000 claims description 26
- 238000004804 winding Methods 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000003302 ferromagnetic material Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 50
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 30
- 239000011701 zinc Substances 0.000 description 30
- 229910052725 zinc Inorganic materials 0.000 description 30
- 238000000034 method Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005246 galvanizing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
- C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Induction Heating (AREA)
- Coating With Molten Metal (AREA)
Abstract
The invention discloses a three-phase electromagnetic wiping device suitable for a rod-shaped workpiece, which comprises: the center of the coil framework is provided with a through hole, the through hole can be used for a rod-shaped workpiece to move upwards to pass through, and a liquid plating layer is adhered to the surface of the rod-shaped workpiece; at least one group of three-phase coils are sequentially wound on the outer side of the coil framework along the axial arrangement; when at least one group of three-phase coils are electrified, each phase coil generates an alternating magnetic field, and at least one group of three-phase coils synthesizes a traveling wave magnetic field at the center of a coil framework; when a rod-shaped workpiece passes through the through hole in an upward movement way, under the action of alternating magnetic fields generated by each phase coil, a first downward-inclined electromagnetic force is induced, and under the action of a traveling wave magnetic field, a second electromagnetic force opposite to the movement direction of the rod-shaped workpiece is induced, the first electromagnetic force and the second electromagnetic force prevent the liquid coating from moving upwards, the adhesion force between the coatings is overcome, the coatings are compressed, and the redundant coatings are wiped, so that the thickness of the coatings of the rod-shaped workpiece is controlled. The device provided by the invention has a good wiping effect.
Description
Technical Field
The invention relates to the technical field of hot dip galvanizing, in particular to a three-phase electromagnetic wiping device suitable for rod-shaped workpieces.
Background
In the hot dip galvanizing process of steel, a bar-shaped workpiece is sent into a zinc pot through a sinking roller by a conveying device, and is led out of the zinc pot after a layer of zinc liquid is adhered to the surface of the bar-shaped workpiece. At the moment, the galvanized layer on the surface of the rod-shaped workpiece is often too thick and uneven, the wiping device is required to thin the zinc liquid plating layer on the surface of the rod-shaped workpiece to the required thickness, the smoothness and uniformity of the plating layer are ensured, and the redundant zinc liquid is wiped back to the zinc pot. The best of the conventional wiping processes is the gas wiping method. The gas wiping method is to send a certain amount of gas into an air knife through compression, and generate wiping force on the surface of the unset galvanized layer through the generated high-speed air flow, so that the redundant zinc liquid is wiped back to the zinc pot. However, as the production line speed increases, the air pressure also increases, which causes zinc liquid on the surface of the rod-shaped workpiece to splash, and the quality is reduced, so that the zinc liquid is oxidized and atomized. Not only wasting zinc, but also dispersing zinc liquid into the air, and polluting the environment.
For this reason, the electromagnetic wiping technique can solve the above-mentioned problems as a novel wiping technique. The electromagnetic wiping technology has the characteristics of non-contact, easiness in control, uniform coating, no impurity introduction, capability of meeting the high-speed production requirement and the like. The current electromagnetic wiping technology is mainly based on a single-phase coil, for example, the device proposed in the patent of publication No. CN101665897A, and the device has the defects of larger radial electromagnetic force and smaller axial electromagnetic force, and the axial electromagnetic force is the main acting force for preventing the movement of a coating, so that the efficiency of the single-phase electromagnetic wiping technology is lower.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to solve the technical problems of larger radial electromagnetic force and smaller axial electromagnetic force and lower efficiency of the single-phase electromagnetic wiping technology in the prior electromagnetic wiping technology.
To achieve the above object, the present invention provides a three-phase electromagnetic wiping device suitable for a rod-shaped workpiece, comprising: a bobbin and at least one set of three-phase coils;
the center of the coil framework is provided with a through hole, the through hole can be used for a rod-shaped workpiece to move upwards to pass through, a liquid plating layer is adhered to the surface of the rod-shaped workpiece, and the rod-shaped workpiece is made of ferromagnetic materials;
the at least one group of three-phase coils are sequentially wound on the outer side of the coil framework along the axial direction; when at least one group of three-phase coils are electrified, each phase coil generates an alternating magnetic field, at least one group of three-phase coils synthesizes a traveling wave magnetic field at the center of the coil framework, and a bar-shaped workpiece of the ferromagnetic material has a magnetism gathering effect on the alternating magnetic field and the traveling wave magnetic field;
when a rod-shaped workpiece moves upwards to pass through the through hole, under the action of alternating magnetic fields generated by phase coils, a first downward inclined electromagnetic force is induced on the liquid coating, under the action of a travelling wave magnetic field, a second electromagnetic force opposite to the movement direction of the rod-shaped workpiece is induced on the liquid coating, the first electromagnetic force and the second electromagnetic force prevent the liquid coating from moving upwards, the adhesive force between the coatings is overcome, the coatings are compressed, the redundant coatings are wiped, the thickness of the coatings of the rod-shaped workpiece is controlled, the first electromagnetic force comprises a radial component and an axial component, the radial component compresses the liquid coating, and the axial component and the second electromagnetic force are overlapped to wipe the redundant coatings.
Optionally, a cooling water pipe is arranged at the axis of each coil in the at least one group of three-phase coils; and cooling water is introduced into the cooling water pipe, and the temperature of at least one group of three-phase coils is controlled by controlling the mass flow rate of the cooling water so as to ensure that the three-phase coils cannot overheat and lose insulation.
Optionally, the coil former includes a sleeve and a plurality of spacers;
the at least one group of three-phase coils are wound on the sleeve in an axial arrangement manner, each group of three-phase coils are wound according to a preset phase arrangement sequence, and a plurality of partition plates separate adjacent two adjacent coils, so that each phase coil is wound independently; the phase arrangement and the winding mode of each group of three-phase coils are the same.
Optionally, the through hole shape, the cross section shape of the coil framework and the winding shape of the three-phase coil winding sleeve are matched with the cross section shape of the rod-shaped workpiece.
Optionally, the frequency and the amplitude of the energizing current of at least one group of three-phase coils determine the magnitudes of the first electromagnetic force and the second electromagnetic force, and further determine the plating thickness of the rod-shaped workpiece.
Optionally, if the three-phase coils include more than two groups, each group of three-phase coils employs the same set of power sources to ensure that the frequency and magnitude of the energizing current of each phase coil are the same.
Optionally, the moving direction of the travelling wave magnetic field is opposite to the moving direction of the rod-shaped workpiece by controlling the phase relation of the energizing currents of the at least one set of three-phase coils.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
the electromagnetic wiping device provided by the invention is simple to control and easy to operate, and when a rod-shaped workpiece with the surface adhered with the liquid galvanized layer upwards passes through the three-phase electromagnetic wiping device: on the one hand, for a single-phase alternating magnetic field, an oblique downward electromagnetic force can be formed on the galvanized layer through induced alternating current, the component force direction of the electromagnetic force in the axial direction is opposite to the movement direction of the rod-shaped workpiece, the erasing effect is achieved, and the component force in the radial direction points to the inside of the rod-shaped workpiece, and the effect of compressing the plating layer is achieved; on the other hand, for the three-phase composite traveling wave magnetic field, electromagnetic force in the same direction as that of the traveling wave magnetic field is induced on the galvanized layer, and the direction of the electromagnetic force is opposite to the moving direction of the rod-shaped workpiece, so that the zinc liquid can be wiped off. Under the action of the electromagnetic force synthesized by the liquid zinc and the liquid zinc, the liquid zinc is prevented from moving continuously, and the adhesive force of a galvanized layer is overcome, so that the redundant zinc liquid is wiped off, and the effect of wiping zinc is achieved. Therefore, the electromagnetic wiping force can be controlled only by changing the frequency and the effective value of the current, and the effect of controlling the thickness of the coating is further achieved, so that the control is simple and accurate.
Compared with the traditional single-phase electromagnetic wiping device, the three-phase electromagnetic wiping device can additionally generate a travelling wave magnetic field, so that electromagnetic force with the same direction as the travelling wave magnetic field is generated, namely, electromagnetic force along the axial direction is larger, and a more efficient wiping effect is brought.
The electromagnetic wiping device provided by the invention has a simple structure, and the device directly generates a magnetic field through the coil, so that the zinc wiping effect is achieved, and an iron core is not needed, so that the weight and the complexity of the device are reduced, and the device is easy to assemble and use.
The electromagnetic wiping device provided by the invention has good wiping effect, the coil shape is adapted to the section of the rod-shaped workpiece, and the same electromagnetic force along the circumferential direction is ensured, so that the same wiping effect is generated in the circumferential direction of the rod-shaped workpiece, and the uniformity of a plating layer on the surface of the rod-shaped workpiece is ensured.
The electromagnetic wiping device provided by the invention can stably run for a long time, circulating cooling water is introduced into the device to prevent the coil from overheating under the thermal effect of heat conduction and current, so that the temperature of the coil can be maintained at a lower level, insulation failure can not occur, the electromagnetic wiping device can stably run for a long time, and the maintenance cost is reduced. And only electromagnetic field coupling is arranged between the device and the rod-shaped workpiece, direct contact is not generated, touch of the rod-shaped workpiece and the device is avoided, and the running stability of the device is improved.
Drawings
FIG. 1 is a schematic diagram of a three-phase electromagnetic wiping device suitable for rod-shaped workpieces provided by the invention;
FIG. 2 is a schematic view of a three-phase electromagnetic wiping device suitable for a rod-shaped workpiece according to the present invention;
FIG. 3 is a schematic structural view of a three-phase electromagnetic wiping device according to an embodiment of the three-phase electromagnetic wiping device for rod-shaped workpieces, which is provided by the invention, and is suitable for round rod-shaped workpieces;
FIG. 4 is a schematic view of a coil bobbin of one embodiment of a three-phase electromagnetic wiping device for a rod-shaped workpiece according to the present invention, suitable for a round rod-shaped workpiece;
FIG. 5 is a schematic view of a coil structure of an embodiment of a three-phase electromagnetic wiping device for a rod-shaped workpiece according to the present invention, which is applicable to a round rod-shaped workpiece;
fig. 6 is a schematic structural view of a three-phase electromagnetic wiping device according to an embodiment of the three-phase electromagnetic wiping device for a rod-shaped workpiece, which is provided by the invention, and is suitable for a hexagonal rod-shaped workpiece;
FIG. 7 is a schematic view of a coil bobbin of one embodiment of a three-phase electromagnetic wiping device for a rod-shaped workpiece according to the present invention, suitable for a hexagonal rod-shaped workpiece;
FIG. 8 is a schematic view of a coil structure of an embodiment of a three-phase electromagnetic wiping device for a rod-shaped workpiece according to the present invention, which is suitable for a hexagonal rod-shaped workpiece;
FIG. 9 is a waveform diagram of three-phase coil current and voltage of a three-phase electromagnetic wiping device for a rod-shaped workpiece;
FIG. 10 is a graph showing waveforms of radial stress and axial stress applied to a plating layer of a three-phase electromagnetic wiping device suitable for a rod-shaped workpiece;
in all the figures, the same reference numerals are used to designate the same elements or structures, wherein 1 is a rod-like workpiece; 2 is a plating layer detector; 3 is a coil group; 3-1 is a phase A coil; 3-1-1 is a coil body; 3-1-2 is a coil interface; 3-1-3 is a first terminal; 3-1-4 is a second terminal; 3-1-5 are coil water inlets; 3-1-6 are coil water outlets; 3-2 is a B phase coil; 3-3 is a C-phase coil; 3-4 is a coil skeleton; 3-4-1 is a sleeve; 3-4-2 is an upper separator; 3-4-3 is a first spacer; 3-4-4 is a second spacer; 3-4-5 is a lower separator; 4 is a power supply box; 5 is a computer; 6 is a control box; 7 is a water pump; 8 is a cooling water pipe; 9 is zinc liquid.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The invention provides a three-phase electromagnetic wiping device suitable for a rod-shaped workpiece, which can generate electromagnetic wiping force based on a travelling wave magnetic field, wherein the electromagnetic force is uniformly distributed along the circumferential direction of the outer surface of the rod-shaped workpiece so as to achieve the uniform wiping effect on the rod-shaped workpiece, and the three-phase electromagnetic wiping device is provided with a water cooling system so as to ensure that a magnet can work normally under a high-temperature condition.
The technical scheme adopted by the invention for solving the technical problems is as follows: a three-phase electromagnetic wiping device suitable for rod-shaped workpieces. Comprises a rod-shaped workpiece, a coil group, a power box, a water cooling system, a plating layer detector and a control system. The coil group is arranged at the leading-out end of the rod-shaped workpiece from the zinc liquid; the power box is internally provided with a three-phase alternating current which can generate frequency and amplitude which are adjustable and is connected with the coil assembly through a cable; the water cooling system comprises a water pump and a cooling water pipe, and the water pump is connected with the coil assembly through the cooling water pipe; the control system comprises a computer and a control box; the coating detector, the power supply box and the water pump are all connected with the control box through cables.
According to the scheme, the coil assembly comprises a coil framework and at least one group of three-phase coils, wherein the three-phase coils comprise an A-phase coil, a B-phase coil and a C-phase coil, and the directions from the C-phase coil to the B-phase coil and from the B-phase coil to the A-phase coil are consistent with the moving direction of the rod-shaped workpiece.
The coil framework comprises a sleeve, an upper partition plate, a first partition plate, a second partition plate and a lower partition plate, and the coil framework is made of ceramics. The sleeve is of a cylindrical structure with a through hole in the center, and the centers of the upper partition plate, the first partition plate, the second partition plate and the lower partition plate are provided with through holes and are matched with the outer surface of the sleeve. The upper partition plate is fixedly connected with the upper end of the sleeve, the lower partition plate is fixedly connected with the lower end of the sleeve, and the first partition plate and the second partition plate are sequentially sleeved and fixed on the sleeve, so that the upper partition plate, the first partition plate, the second partition plate and the lower partition plate are distributed at equal intervals from top to bottom.
According to the scheme, the phase A coil is arranged between the upper partition plate and the first partition plate, the phase B coil is arranged between the first partition plate and the second partition plate, and the phase C coil is arranged between the second partition plate and the lower partition plate. The three-phase coils are wound around the sleeve.
The shape and the cross section of the through holes of each part of the coil framework and the winding shape of the three-phase coil around the sleeve are matched with the cross section of the rod-shaped workpiece. When the rod-shaped workpiece passes through the coil group, uniform electromagnetic force is distributed on the outer surface of the rod-shaped workpiece in the circumferential direction.
As an embodiment of the present invention, when the sectional shape of the rod-like work is circular: the sleeve is cylindrical with a circular hole in the center; the upper partition plate, the first partition plate, the second partition plate and the lower partition plate are flat cylinders with round holes in the center, and the round holes are matched with the outer surface of the sleeve; the three-phase coil is wound around the sleeve to form a cylindrical coil.
As an embodiment of the present invention, when the sectional shape of the rod-like work is hexagonal: the sleeve is in a hexagonal cylinder shape with a hexagonal hole at the center, and edges in the vertical direction are subjected to chamfering treatment; the upper partition plate, the first partition plate, the second partition plate and the lower partition plate are flat hexagonal cylinders with hexagonal holes in the center, the hexagonal holes are matched with the outer surface of the sleeve, and edges in the vertical direction are subjected to chamfering treatment; the three-phase coil is wound around the sleeve to form a hexagonal prism-shaped coil.
When the cross section of the rod-shaped workpiece is in other shapes, the structure of each part refers to the two examples, and the through hole shape and the cross section shape of each part of the coil framework, the winding shape of the three-phase coil around the sleeve and the cross section shape of the rod-shaped workpiece are matched.
According to the scheme, the phase A coil comprises a coil main body, a coil interface, a first terminal and a second terminal. The coil main body is formed by winding copper pipes, the coil interfaces are extending parts at two ends of the coil main body, the first wiring terminal and the second wiring terminal are copper plates welded beside the coil interfaces, and the center of the coil main body is provided with a hole so as to be in threaded connection with a power cable. The coil water inlet is an inlet part of the upper coil interface, and the coil water outlet is an inlet part of the lower coil interface.
According to the scheme, the structures and the sizes of the B-phase coil, the C-phase coil and the A-phase coil are identical.
According to the scheme, the coil water inlet of the A-phase coil is connected with the water outlet of the water pump through the cooling water pipe, the coil water outlet of the A-phase coil is connected with the coil water inlet of the B-phase coil through the cooling water pipe, the coil water outlet of the B-phase coil is connected with the coil water inlet of the C-phase coil through the cooling water pipe, and the coil water outlet of the C-phase coil is connected with the water inlet of the water pump through the cooling water pipe.
According to the scheme, the power box can randomly change the frequency of the output current between 50Hz and 150Hz and randomly change the effective value of the output current between 100A and 500A.
According to the scheme, the power box is provided with 4 outgoing lines including an A-phase cable, a B-phase cable, a C-phase cable and a zero line. The A-phase cable is in threaded connection with a first terminal of the A-phase coil, the B-phase cable is in threaded connection with a first terminal of the B-phase coil, and the C-phase cable is in threaded connection with a first terminal of the C-phase coil. The second wiring end of the A-phase coil, the second wiring end of the B-phase coil and the second wiring end of the C-phase coil are connected through a cable in a screwed mode and are connected with a zero line in a screwed mode.
According to the scheme, the coating detector is sleeved at the leading-out end of the rod-shaped workpiece self-coil assembly and is connected with the control box through the cable, so that information such as the running speed of the rod-shaped workpiece, the thickness of the coating, the uniformity of the coating and the like is transmitted into the control box in real time. The power supply box is connected with the control box through a cable, and the frequency and the amplitude of the output current are adjusted according to the control signal output by the control box, so that the electromagnetic wiping force is changed, and the effect of adjusting the coating is achieved. The water pump is connected with the control box through a cable, and the water flow pressure is regulated according to a control signal output by the control box, so that the flow speed of water flow in the coil assembly is changed, and the temperature of the coil assembly is prevented from being too high.
According to the scheme, the computer is connected with the control box through a cable. The computer can display coating information, current effective value and current frequency, and send instructions to the control box through visual operation, and change the current magnitude, frequency and water pump pressure.
The basic principle of the invention is introduced as follows: as shown in FIG. 1, when a rod-shaped workpiece with a liquid coating adhered to the surface passes upward through the three-phase electromagnetic wiping device, on the one hand, for a single-phase alternating magnetic field, a downward-inclined electromagnetic force F can be formed on the coating by the induced alternating current 1 The method comprises the steps of carrying out a first treatment on the surface of the On the other hand, for the three-phase composite traveling wave magnetic field, electromagnetic force F in the same direction as that of the traveling wave magnetic field is induced on the plating layer 2 . Under the action of the combined electromagnetic force F, the liquid plating layer is prevented from moving upwards, the adhesive force between the plating layers is overcome, and the redundant zinc liquid is wiped down, so that the effect of wiping zinc is achieved.
As shown in fig. 2, the three-phase electromagnetic wiping device suitable for the rod-shaped workpiece comprises a rod-shaped workpiece 1, a coil group 3, a power supply box 4, a water cooling system, a coating detector 2 and a control system. The coil assembly 3 is arranged at the leading-out end of the rod-shaped workpiece 1 from the zinc liquid 9, the power supply box 4 is internally provided with three-phase alternating current which can generate frequency and amplitude which are adjustable, the three-phase alternating current is connected with the coil assembly 3 through a cable, the water cooling system comprises a water pump 7 and a cooling water pipe 8, the water pump 7 is connected with the coil assembly 3 through the cooling water pipe 8, and the control system comprises a computer 5 and a control box 6. Wherein, cladding material detector 2, power supply box 4 and water pump 7 all link to each other with control box 6 through the cable.
As shown in fig. 3, 6, the coil set 3 includes a bobbin 3-4 and a three-phase coil including an a-phase coil 3-1, a B-phase coil 3-2 and a C-phase coil 3-3, and the directions of the C-phase coil 3-3 to the B-phase coil 3-2, the B-phase coil 3-2 to the a-phase coil 3-1 should be identical to the moving direction of the rod-shaped work piece 1.
As shown in fig. 4 and 7, the coil frame 3-4 includes a sleeve 3-4-1, an upper partition plate 3-4-2, a first partition plate 3-4-3, a second partition plate 3-4-4 and a lower partition plate 3-4-5, all made of ceramics. The sleeve 3-4-1 is a cylindrical structure with a through hole in the center, and the centers of the upper partition plate 3-4-2, the first partition plate 3-4-3, the second partition plate 3-4-4 and the lower partition plate 3-4-5 are provided with through holes and are matched with the outer surface of the sleeve 3-4-1. The upper partition plate 3-4-2 is fixedly connected with the upper end of the sleeve 3-4-1, the lower partition plate 3-4-5 is fixedly connected with the lower end of the sleeve 3-4-1, and the first partition plate 3-4-3 and the second partition plate 3-4-4 are sequentially sleeved and fixed on the sleeve 3-4-1, so that the upper partition plate 3-4-2, the first partition plate 3-4-3, the second partition plate 3-4-4 and the lower partition plate 3-4-5 are distributed from top to bottom at equal intervals.
The phase A coil 3-1 is arranged between the upper partition plate and the first partition plate, the phase B coil 3-2 is arranged between the first partition plate and the second partition plate, and the phase C coil 3-3 is arranged between the second partition plate and the lower partition plate. The three-phase coils are all wound around the sleeve 3-4-1.
Wherein, the shape and the cross section of the through holes of each part of the coil framework 3-4 and the winding shape of the three-phase coil around the sleeve 3-4-1 are matched with the cross section of the rod-shaped workpiece 1. When the rod-shaped workpiece 1 passes through the coil group 3, uniform electromagnetic force is distributed on the circumferential direction of the outer surface of the rod-shaped workpiece 1.
In the embodiment of the present invention, when the sectional shape of the rod-like work 1 is circular: the sleeve 3-4-1 is cylindrical with a circular hole in the center; the upper partition plate 3-4-2, the first partition plate 3-4-3, the second partition plate 3-4-4 and the lower partition plate 3-4-5 are flat cylinders with round holes at the center, and the round holes are matched with the outer surface of the sleeve 3-4-1; the three-phase coil is wound around the sleeve 3-4-1 to form a cylindrical coil.
In the embodiment of the present invention, when the sectional shape of the rod-like work 1 is hexagonal: the sleeve 3-4-1 is in a hexagonal cylinder shape with a hexagonal hole at the center, and edges in the vertical direction are subjected to chamfering treatment; the upper partition plate 3-4-2, the first partition plate 3-4-3, the second partition plate 3-4-4 and the lower partition plate 3-4-5 are flat hexagonal prisms with a hexagonal hole at the center, the hexagonal hole is matched with the outer surface of the sleeve 3-4-1, and edges in the vertical direction are chamfered; the three-phase coil is wound around the sleeve 3-4-1 to form a hexagonal-prism-shaped coil.
When the cross section of the rod-shaped workpiece 1 is in other shapes, the structure of each part refers to the two examples, so that the shape and the cross section of the through holes of each part of the coil frame 3-4 and the winding shape of the three-phase coil around the sleeve 3-4-1 are matched with the cross section of the rod-shaped workpiece 1.
As shown in fig. 5 and 8, the a-phase coil 3-1 includes a coil body 3-1-1, a coil interface 3-1-2, a first terminal 3-1-3, and a second terminal 3-1-4. The coil main body 3-1-1 is formed by winding copper pipes, the coil interfaces 3-1-2 are extension parts at two ends of the coil main body, the first wiring terminal 3-1-3 and the second wiring terminal 3-1-4 are copper plates welded beside the coil interfaces 3-1-2, and a central opening is formed so as to be in threaded connection with a power cable. The coil water inlet 3-1-5 is the inlet part of the upper coil interface, and the coil water outlet 3-1-6 is the inlet part of the lower coil interface.
The structures and the sizes of the B-phase coil 3-2 and the C-phase coil 3-3 are identical with those of the A-phase coil 3-1.
The coil water inlet 3-1-5 of the phase A coil 3-1 is connected with the water outlet of the water pump 7 through a cooling water pipe 8, the coil water outlet of the phase A coil 3-1 is connected with the coil water inlet of the phase B coil 3-2 through a cooling water pipe, the coil water outlet of the phase B coil 3-2 is connected with the coil water inlet of the phase C coil 3-3 through a cooling water pipe, and the coil water outlet of the phase C coil 3-3 is connected with the water inlet of the water pump 7 through a cooling water pipe 8.
The temperature of the cooling water circulated in the water pump 7 is 20 ℃, the mass flow rate is 1L/min-10L/min, and the mass flow rate of the cooling water can be changed according to the cooling degree of the device in actual operation, so that the purpose of controlling the temperature of the coil assembly 3 is achieved, and the coil assembly 3 is ensured not to cause insulation failure due to overheating.
The power box 4 can arbitrarily change the frequency of the output current between 50Hz and 150Hz, and can arbitrarily change the effective value of the output current between 100A and 500A. The power box 4 has 4 outgoing lines of A phase cable, B phase cable, C phase cable and zero line altogether. The A-phase cable is in threaded connection with a first terminal of the A-phase coil 3-1, the B-phase cable is in threaded connection with a first terminal of the B-phase coil 3-2, and the C-phase cable is in threaded connection with a first terminal of the C-phase coil 3-3. The second terminal of the phase A coil 3-1, the second terminal of the phase B coil 3-2 and the second terminal of the phase C coil 3-3 are connected with each other through the cable in a screwed mode and are connected with the zero line in a screwed mode.
The coating detector 2 is sleeved at the leading-out end of the rod-shaped workpiece 1 from the coil assembly 3 and is connected with the control box 6 through a cable, so that information such as the running speed of the rod-shaped workpiece 1, the thickness of a coating, the uniformity of the coating and the like is transmitted into the control box 6 in real time. The power supply box 4 is connected with the control box 6 through a cable, and the frequency and the amplitude of the output current are adjusted according to the control signal output by the control box 6, so that the electromagnetic wiping force is changed, and the effect of adjusting the coating is achieved. The water pump 7 is connected with the control box 6 through a cable, and the pressure of water flow is regulated according to a control signal output by the control box 6, so that the flow speed of the water flow in the coil assembly 3 is changed, and the overhigh temperature of the coil assembly 3 is prevented.
The computer 5 is connected with the control box 6 through a cable. The computer 5 can display coating information, current effective value and current frequency, and send instructions to the control box 6 through visual operation, and change the current effective value, frequency and pressure of the water pump 7.
In order to further explain the three-phase electromagnetic wiping device suitable for the rod-shaped workpiece, the following specific embodiments of the invention are provided.
The method and the device are adopted to implement hot galvanizing of the round bar-shaped workpiece with the diameter of 40 mm. The process design is as follows: the sleeve is cylindrical with the inner diameter of 60mm and the outer diameter of 80 mm; the upper partition plate, the first partition plate, the second partition plate and the lower partition plate are flat cylindrical with the inner diameter of 80mm and the outer diameter of 240 mm; the A-phase coil, the B-phase coil and the C-phase coil are formed by winding copper tubes with the outer diameter of 10mm and the inner diameter of 4mm, the number of turns is 80, and A, B, C three-phase alternating current is sequentially fed; as shown in fig. 9, the current frequency is 50Hz, the phase angles of the three-phase currents differ by 120 degrees, and the effective value is 100A; the temperature of the circulating cooling water is 20 ℃, and the mass flow rate is 2L/min.
The radial stress and axial stress variation waveform of the plating layer after the energization is shown in fig. 10. It can be seen from the figure that at the instant of current flow, both radial and axial stresses produce a large abrupt change, which then stabilizes gradually after 3 cycles. Wherein: the radial stress is gradually stabilized at about 450Pa and is negative, which indicates that the radial stress direction is inward along the radial direction, namely the radial acting force of the coil on the zinc liquid causes the zinc liquid to have a tendency of inward shrinkage, and the effect of thinning is achieved; the axial stress is gradually stabilized at about 160Pa and is negative, which indicates that the axial stress direction is axially downward, namely the axial acting force of the coil on the zinc liquid causes the zinc liquid to have a downward erasing trend, and the wiping effect is achieved.
According to the wiping device provided by the embodiment of the invention, the wiping comprises the following steps:
1. the water pump pressure was set by the control box so that the mass flow rate of the circulating cooling water was 2L/min at the pressure, and the water pump was turned on.
2. The frequency of the output current of the three-phase current source in the power supply box is set to be 50Hz through the control box, the effective value is 100A, and the current is fed into the coil assembly.
3. The rod-shaped workpiece is sent into the wiping device through the clamp, and the rod-shaped workpiece passes through the wiping device and the coating detector at a constant speed.
4. And observing the coating information fed back by the coating detector through a computer.
5. The rod-shaped workpiece is removed from the jig.
6. Closing the power supply box, closing the water pump, and finishing the zinc coating process. It should be noted that the present invention is exemplified by using the liquid plating layer as zinc, and the liquid plating layer applicable to the apparatus of the present invention may be other materials.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A three-phase electromagnetic wiping device suitable for rod-shaped workpieces, comprising: a bobbin and at least one set of three-phase coils;
the center of the coil framework is provided with a through hole, the through hole can be used for a rod-shaped workpiece to move upwards to pass through, a liquid plating layer is adhered to the surface of the rod-shaped workpiece, and the rod-shaped workpiece is made of ferromagnetic materials;
the at least one group of three-phase coils are sequentially wound on the outer side of the coil framework along the axial direction; when at least one group of three-phase coils are electrified, each phase coil generates an alternating magnetic field, at least one group of three-phase coils synthesizes a traveling wave magnetic field at the center of the coil framework, and a bar-shaped workpiece of the ferromagnetic material has a magnetism gathering effect on the alternating magnetic field and the traveling wave magnetic field;
the rod-shaped workpiece moves upwards to pass through the through hole, under the action of alternating magnetic fields generated by phase coils, a first downward inclined electromagnetic force is induced on the liquid coating, under the action of a travelling wave magnetic field, a second electromagnetic force opposite to the movement direction of the rod-shaped workpiece is induced on the liquid coating, the first electromagnetic force and the second electromagnetic force prevent the liquid coating from moving upwards, the adhesive force between the coatings is overcome, the coating is compressed, the redundant coating is wiped, so that the thickness of the coating of the rod-shaped workpiece is controlled, the first electromagnetic force comprises a radial component and an axial component, the radial component compresses the liquid coating, and the axial component and the second electromagnetic force are superposed to wipe the redundant coating.
2. The three-phase electromagnetic wiping device suitable for rod-shaped workpieces according to claim 1, wherein the axis of each coil in the at least one group of three-phase coils is provided with a cooling water pipe; and cooling water is introduced into the cooling water pipe, and the temperature of at least one group of three-phase coils is controlled by controlling the mass flow rate of the cooling water so as to ensure that the three-phase coils cannot overheat and lose insulation.
3. The three-phase electromagnetic wiping device suitable for rod-shaped workpieces according to claim 1, wherein the coil former comprises a sleeve and a plurality of baffles;
the at least one group of three-phase coils are wound on the sleeve in an axial arrangement manner, each group of three-phase coils are wound according to a preset phase arrangement sequence, and a plurality of partition plates separate adjacent two adjacent coils, so that each phase coil is wound independently; the phase arrangement and the winding mode of each group of three-phase coils are the same.
4. A three-phase electromagnetic wiping device suitable for rod-shaped workpieces according to claim 3, characterized in that the through-hole shape, the cross-sectional shape of the coil former and the winding shape of the three-phase coil winding sleeve are matched with the cross-sectional shape of the rod-shaped workpiece.
5. The three-phase electromagnetic wiping device for a rod-shaped workpiece according to claim 1, wherein the frequency and the amplitude of the energizing current of at least one set of three-phase coils determine the magnitudes of the first electromagnetic force and the second electromagnetic force, and thereby determine the plating thickness of the rod-shaped workpiece.
6. A three-phase electromagnetic wiping device suitable for rod-shaped workpieces according to claim 1, characterized in that if the three-phase coils comprise more than two groups, each group of three-phase coils adopts the same set of power supply to ensure that the frequency and the amplitude of the energizing current of each phase are the same.
7. A three-phase electromagnetic wiping device suitable for a rod-shaped work piece according to any one of claims 1 to 6, characterized in that the travelling wave magnetic field is moved in a direction opposite to the movement direction of the rod-shaped work piece by controlling the phase relation of the energizing currents of the at least one set of three-phase coils.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665897A (en) * | 2009-10-14 | 2010-03-10 | 天津市工大镀锌设备有限公司 | Method and device for controlling thickness of steel wire hot-plating layer |
| CN103614681A (en) * | 2013-11-12 | 2014-03-05 | 张家港市奥神科技有限公司 | Electromagnetic zinc applying device |
| CN210104053U (en) * | 2019-05-31 | 2020-02-21 | 华中科技大学 | Three-phase electromagnetic wiping device suitable for rod-shaped workpiece |
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2019
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101665897A (en) * | 2009-10-14 | 2010-03-10 | 天津市工大镀锌设备有限公司 | Method and device for controlling thickness of steel wire hot-plating layer |
| CN103614681A (en) * | 2013-11-12 | 2014-03-05 | 张家港市奥神科技有限公司 | Electromagnetic zinc applying device |
| CN210104053U (en) * | 2019-05-31 | 2020-02-21 | 华中科技大学 | Three-phase electromagnetic wiping device suitable for rod-shaped workpiece |
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