CN108806968B - Design and manufacturing method of electromagnetic self-piercing riveting flat coil - Google Patents
Design and manufacturing method of electromagnetic self-piercing riveting flat coil Download PDFInfo
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- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/076—Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
- H01F41/077—Deforming the cross section or shape of the winding material while winding
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- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/10—Connecting leads to windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The invention discloses a design and manufacture method of an electromagnetic self-piercing riveting flat coil, which comprises the following steps: (1) establishing a riveting force model; (2) solving the riveting force; the manufacturing method of the flat coil comprises the following steps: (1) manufacturing a framework; (2) winding a copper wire; (3) Gluing and fixing, and finishing the manufacture of the flat coil, the invention has the advantages that: the coil parameter design is guided according to the size of the riveting force, so that the energy utilization rate of the electromagnetic self-piercing riveting equipment can be obviously improved; the coil has higher mechanical strength when in use; the wiring terminal can be effectively prevented from loosening and striking fire.
Description
Technical Field
The invention relates to the technical field of design and manufacture of riveting equipment coils, in particular to the technical field of flat spiral coils for electromagnetic riveting.
Background
With the development of science and technology, the industrial assembly manufacturing field puts higher requirements on the assembly precision, efficiency and reliability of workpieces. The electromagnetic riveting technology is more and more widely applied by virtue of strong advantages, and is particularly applied to connection of large-size thin-wall workpieces in aerospace. The impact distance is almost zero during electromagnetic riveting, and the rivet can complete plastic deformation in a short time; the expansion of the nail rod and the formation of the pier head are almost synchronously carried out, and the interference amount and the fit clearance are relatively uniform; the interlayer thickness structure can also ensure better riveting quality, and the fatigue life of the joint is far longer than that of a common riveting joint. Electromagnetic riveting is mostly formed once, and relative hammer riveting noise pollution is low, and the cold hardening phenomenon of material when also having avoided riveting many times simultaneously. The method can be used for forming the rivet which is made of a material difficult to form, and the phenomenon of shearing damage at the pier head during hammer riveting is avoided.
The electromagnetic self-piercing riveting combines the electromagnetic riveting and the traditional self-piercing riveting, compared with the electromagnetic riveting, the electromagnetic self-piercing riveting does not need to be perforated in advance, and the production cost is greatly saved while the joint has certain reliable strength; compared with the traditional self-piercing riveting, the riveting device adopts electromagnetic force loading, is easy to control and realize automation, and can provide high-load and high-speed riveting force, and researches show that the riveting device has better mechanical property compared with the traditional self-piercing riveting. The electromagnetic self-piercing riveting discharge coil is a main component for providing power for the punch. Therefore, the coil structure design directly concerns the energy utilization rate of the electromagnetic riveting equipment and the service life of the coil structure. Frequent coil replacement can not only lead to unstable process, but also increase cost input and influence the production process of the production industry. The coil manufacturing mainly comprises framework design, wire winding and lead connector connection. At present, the wound coil and the coil framework are fixed by bolts mostly. Because the coil can receive certain impact force during riveting, the damage of becoming flexible easily. In addition, the coil lead wire often adopts the flat copper wire mode of buckling, or adopts the bolt to compress tightly the joint mode and draw forth, and the copper line is buckled insulating easy damage, and it often takes place to break, and the bolt is not hard up often takes place joint "striking sparks" and burns out the copper line. Specifically, for example, in the coil lead-out mode of the patent application CN105761900a, 45-degree folding is adopted, and the copper wire is easily damaged or even broken due to multiple right-angle bending; for example, in the traditional manufacturing technology of the electromagnetic riveting exciting coil, the lead wire connector of the coil is in bolt compression joint, and the copper wire is easily burnt out by the 'striking fire' of the connector. Therefore, the electromagnetic self-piercing riveting coil must have sufficient mechanical strength and good insulating performance, and the problem of lead joint connection should be considered. The optimization of the discharge coil is a problem which needs to be solved by popularizing and applying the electromagnetic self-punching riveting technology.
Disclosure of Invention
The invention aims to solve the defects and provide a design and manufacturing method of an electromagnetic self-piercing riveting flat coil, which can improve the mechanical strength, the insulating property and the reliability of a lead connector of the coil, reduce the cost, provide a reference basis for manufacturing the similar flat coils and promote the development of the electromagnetic self-piercing riveting technology.
The technical solution adopted by the present invention to solve the above technical problems is as follows:
a design and manufacturing method of an electromagnetic self-piercing riveting flat coil comprises a design method of the flat coil and a manufacturing method of the flat coil, wherein the design method of the flat coil comprises the following steps:
(1) Establishing a riveting force model: according to the electromagnetic self-piercing riveting principle, the riveting process can be simplified into models of a discharge coil and a driving coil, the driving coil is equivalent to a double-coil calculation with different radiuses, and the positions of the two coils are respectively positioned on two sides of the average radius, so that the driving coil can be equivalent to five single-turn coils for calculation to obtain an equivalent circuit model;
(2) Solving the riveting force: neglecting the resistance of the coil, the voltage balance equation for the drive coil can be listed by the equivalent circuit model as follows:
the bit vector from S to P is
According to the Biao-Saval law, the magnetic induction intensity generated by the circular current I at the point P is
Wherein E and K are respectively the firstAnd a second full ellipse integral, calculating the acting force between two coaxial current-carrying ring coils, setting the distance between the ring centers as a, and the radius and the current of the two coaxial current-carrying ring coils are respectively
，
And
，
as can be seen from the principle of the induced current,
and
in the opposite direction, using the ampere force formula
Solving to finally obtain the change curve of the impact force, namely the riveting force along with time;
the manufacturing method of the flat coil comprises the following steps:
(1) Manufacturing a framework: manufacturing a coil framework by using bakelite, designing the thickness of the coil framework according to riveting force and installation size, respectively arranging a coil winding column and a coil positioning column at two side parts of the coil framework, arranging an inner connecting column hole and a positioning screw hole on the coil framework, arranging an annular groove at the outer edge of the coil framework, and finishing the manufacturing of the coil framework;
(2) Winding a copper wire: after the coil framework is manufactured, preparing a copper wire to be wound and a binding post, wherein the binding post is divided into an inner binding post and an outer binding post, one end of the copper wire and the inner binding post are fixed by a rivet, then the inner binding post is inserted into an inner binding post hole of the coil framework, after the inner binding post is inserted and compacted, a coil positioning post of the coil framework is clamped by a four-jaw chuck, the four-jaw chuck is connected with a manual speed reducer, one person slowly shakes the speed reducer to enable the coil framework to slowly rotate, one person straightens out the copper wire, the copper wire is tightly attached to the bottom surface of the coil framework and is slowly wound on a coil winding post, in the winding process, the person responsible for winding the copper wire holds the copper wire by one hand, the other person lightly strikes the wound copper wire by a rubber hammer by the other hand to enable the copper wire to be tightly attached to the coil framework of the copper wire and to be tightly wound, after the copper wire is fully wound on the coil framework of the coil, the copper wire is tensioned, the copper wire is wound on the outer edge of the wound coil framework of the wound copper wire is fixed, a design allowance is left to cut off, the copper wire, the end is cut off the copper wire, the end of the copper wire and is connected with the outer binding post in the same connection mode, the adhesive tape, the outer edge of the adhesive tape coil framework of the adhesive tape, and the outer edge of the copper wire of the coil framework of the copper wire is fixed along the copper wire, and the outer side of the coil framework of the copper wire, and the copper wire of the copper wire wound on the outer side of the coil framework of the copper wire;
(3) Gluing and fixing: preparing insulating glue, after the preparation of the insulating glue is finished, manufacturing an inner clamping plate and an outer clamping plate, wherein the inner clamping plate and the outer clamping plate are both epoxy plates and are respectively positioned at the inner side and the outer side of a coil framework, arranging bolts in positioning screw holes in a rotating mode, clamping and fixing the outer epoxy plate on the coil framework, clamping the coil framework on a four-jaw chuck, supporting the coil framework against the end face of the four-jaw chuck, enabling the inner epoxy plate to be fixed under the clamping of the coil framework and the end face of the chuck, brushing a layer of insulating glue on the outer edge face of the coil framework after the fixing is finished, enabling the insulating glue to fill the annular groove of the coil framework, then winding a circle on the outer edge of the coil framework by using a glass ribbon, brushing the insulating glue on the glass ribbon which is just wound, continuing to wind the glass ribbon, repeatedly and alternately, forming a rubber ring until the thickness of the wound glass ribbon reaches the designed rubber ring thickness, fixing the outer binding post in the rubber ring, placing for 2-3 days after the gluing is finished, enabling the insulating glue to be air-dried and shaped, taking the coil framework down from the chuck after the shaping, and removing the epoxy plates to finish the manufacturing of the flat coil.
The coil positioning structure is characterized in that the outer epoxy plate is provided with a positioning hole, a bolt is screwed in the positioning screw hole of the coil framework after penetrating through the positioning hole of the outer epoxy plate, the outer epoxy plate is fixed on the coil framework, the inner epoxy plate is provided with a limiting hole, and the inner epoxy plate is sleeved outside the coil positioning column of the coil framework through the limiting hole.
The insulating glue is composed of epoxy resin, polyamide resin and a toughening agent, wherein the weight ratio of the epoxy resin to the polyamide resin is 3:1, the toughening agent is dibutyl phthalate, and the weight of the toughening agent is 5% of that of the epoxy resin.
The bakelite is phenolic resin, and the binding post is a copper block.
And riveting holes are formed in the binding posts, and the copper wires and the binding posts are riveted and fixed through the riveting holes by the rivets.
The invention adopts the technical proposal to achieve the following beneficial effects:
1. in the traditional design method, coil parameters are designed mostly through inductance calculation, factors influencing inductance calculation are complex and changeable, and calculation result errors are large. The invention starts from the principle of electromagnetic self-piercing riveting, analyzes the law of induced current around the coil, solves the electromagnetic self-piercing riveting impact force by combining the Biot-Saval law, guides the parameter design of the coil according to the magnitude of the riveting force, and can obviously improve the energy utilization rate of the electromagnetic self-piercing riveting equipment.
2. The invention adopts the insulating glue to combine with the glass ribbon to fasten the copper wire coil and the coil framework, thereby not only solving the insulation problem of the coil during high-voltage discharge, but also ensuring that the coil has higher mechanical strength during use.
3. Different from the traditional lead wire mode of bending a copper wire or compressing a bolt, the invention adopts the mode of riveting the binding post, and can effectively prevent the binding post from loosening and striking fire. In addition, the rivet with high conductivity is adopted for riveting, so that the wiring terminal can be well contacted, and the conduction of the coil cannot be influenced.
Drawings
FIG. 1 is a schematic structural diagram of a flat coil;
FIG. 2 is an electromagnetic self-piercing riveting theoretical model;
FIG. 3 is a Cartesian coordinate of the discharge coil;
FIG. 4 is a schematic diagram of two coaxial current-carrying toroids;
FIG. 5 is a graph of impact force versus time at different voltages;
FIG. 6 is a schematic structural diagram of a bobbin;
FIG. 7 is a schematic top view of the structure of FIG. 6;
FIG. 8 is a schematic structural view of the inner and outer terminals;
FIG. 9 is a schematic top view of the structure of FIG. 8;
FIG. 10 is a schematic view of a copper wire and a terminal post;
FIG. 11 is a schematic structural view of an inner epoxy plate;
FIG. 12 is a schematic top view of the structure of FIG. 11;
FIG. 13 is a schematic structural view of an outer epoxy plate;
fig. 14 is a schematic top view of the structure of fig. 13.
Detailed Description
A design and manufacturing method of an electromagnetic self-piercing riveting flat coil comprises a design method of the flat coil and a manufacturing method of the flat coil, wherein the design method of the flat coil comprises the following steps:
(1) Establishing a riveting force model: according to the electromagnetic self-piercing riveting principle, the riveting process can be simplified into models of a discharge coil and a driving coil, the driving coil is equivalent to a double-coil calculation with different radiuses, and the positions of the two coils are respectively positioned on two sides of an average radius, so that the driving coil can be equivalent to five single-turn coils for calculation, and finally an equivalent circuit model shown in the attached figure 2 is obtained;
(2) Solving riveting force: neglecting the resistance of the coils, the voltage balance equations for the drive coils can be listed by the equivalent circuit model as follows:
the bit vector from S to P is
According to the Biao-Saval law, the magnetic induction intensity generated by the circular current I at the point P is
Wherein E and K are the first and second full elliptic integrals, respectively, and the Cartesian coordinate diagram of the discharge coil is shown in FIG. 3. The force between two coaxial current-carrying toroids was calculated as shown in FIG. 4, with the center-to-center distance a and their radii and current respectively
，
And
，
as can be seen from the principle of the induced current,
and
in the opposite direction, using the ampere force formula
Solving is carried out, and finally the change curve of the impact force, namely the riveting force along with time, shown in the attached figure 5 is obtained;
the manufacturing method of the flat coil comprises the following steps:
(1) Manufacturing a framework: manufacturing a coil framework by using bakelite which is phenolic resin, designing the thickness of the coil framework 4 according to riveting force and installation size, as shown in fig. 6 and 7, respectively arranging coil winding columns 11 and coil positioning columns 12 at two side parts of the coil framework 4, arranging inner connecting column holes 10 and positioning screw holes 13 on the coil framework 4, arranging ring grooves 14 at the outer edge of the coil framework 4, completing the manufacturing of the coil framework 4, wherein the ring grooves 14 can facilitate the fixation of a rubber ring 3 after subsequent gluing, and the rubber ring 3 and the coil framework 4 can be connected and fixed by insulating glue stored in the ring grooves 14;
(2) Winding a copper wire: after the coil bobbin 4 is manufactured, a copper wire 7 to be wound and a terminal 6 as shown in fig. 8 and 9 are prepared, the terminal 6 is divided into an inner terminal 2 and an outer terminal 1, and the terminal 6 is a copper block. One end of the copper wire 7 is fixed with the inner binding post 2 by a rivet 8, and the connection mode of the copper wire 7 and the binding post 6 is as shown in the attached drawing 10: the binding post 6 is provided with a riveting hole 9, and the rivet 8 rivets and fixes the copper wire 7 and the binding post 6 through the riveting hole 9. Then the inner binding post 2 is inserted into an inner binding post hole 10 of the coil framework 4, after the inner binding post 2 is inserted and compacted, a coil positioning column 12 of the coil framework 4 is clamped by a four-jaw chuck, the four-jaw chuck is connected with a manual speed reducer, the speed reducer is slowly shaken by one person to slowly rotate the coil framework 4, the copper wire 7 is straightened by one person to be tightly adhered to the bottom surface of the coil framework 4 to be slowly wound on a coil winding post 11, in the winding process, a person in charge of winding the copper wire 7 holds the copper wire 7 by one hand, and the wound copper wire 7 is lightly knocked by the other hand by a rubber hammer to ensure that the copper wire 7 is tightly adhered to the coil framework 4 and is tightly wound, and the insulating layer of the copper wire 7 is prevented from being damaged by knocking by the rubber hammer. After the coil framework 4 is fully wound with the copper wire 7, stopping the rotation of the coil framework 4, tensioning the copper wire 7, preventing the wound copper wire 7 from rebounding, winding an adhesive tape on the outer edge of the wound copper wire coil 5 to fix the copper wire 7, loosening the copper wire 7 after the fixation is finished, leaving design allowance to cut the copper wire 7, then cutting the end of the copper wire 7, connecting the end with the outer side binding post 1 in the same connection mode, fixing the copper wire 7 and the outer side binding post 1 at the outer edge of the coil framework 4 along the tangent line of the coil framework 4 by using the adhesive tape after the connection is finished, and winding the copper wire 7;
(3) Gluing and fixing: preparing insulating glue, wherein the insulating glue is composed of epoxy resin, polyamide resin and a toughening agent, the weight ratio of the epoxy resin to the polyamide resin is 3:1, the toughening agent is dibutyl phthalate, and the weight of the toughening agent is 5% of that of the epoxy resin. After insulating glue is prepared and is accomplished, two splint of preparation inside and outside are used for the rubberizing, make the glue ring shaping, prevent that glue is excessive, and inside and outside splint are the epoxy board to be located coil skeleton 4's inside and outside both sides respectively, put the bolt soon in location screw 13, press from both sides the epoxy board 16 clamp in the outside and fix on coil skeleton 4, as shown in fig. 13 and 14, the concrete structure of outside epoxy board 16 is as follows: and a positioning hole 17 is formed in the outer epoxy plate 16, and a bolt is screwed into the positioning screw hole 13 of the coil frame 4 after penetrating through the positioning hole 17 of the outer epoxy plate 16, so that the outer epoxy plate 16 is fixed on the coil frame 4. As shown in fig. 11 and 12, the specific structure of the inner epoxy plate 18 is as follows: the inner epoxy plate 18 is provided with a limiting hole 19, and the inner epoxy plate 18 is sleeved outside the coil positioning column 12 of the coil framework 4 through the limiting hole 19. Then clamping the coil framework 4 on a four-jaw chuck, tightly pushing the coil framework 4 against the end face of the four-jaw chuck, fixing the inner epoxy plate 18 under the clamping of the coil framework 4 and the end face of the chuck, brushing a layer of insulating glue on the outer edge face of the coil framework 4 after the fixing is finished, filling the insulating glue into the annular groove 14 of the coil framework 4, then winding a circle of glass ribbon on the outer edge of the coil framework 4, brushing the insulating glue on the glass ribbon which is just wound, continuing to wind the glass ribbon, repeating the alternation until the thickness of the wound glass ribbon reaches the designed thickness of the rubber ring to form the rubber ring 3, fixing the outer binding post 1 in the rubber ring 3, forming the rubber layer on the end face of the coil framework 4 through the gap between the outer epoxy plate 16 and the end face of the coil framework 4, filling the insulating glue between the copper wires 7, integrating the copper wires 7 and the coil framework 4, and achieving the curing effect of the copper wire coil 5. And (3) after gluing, standing for 2-3 days to allow the insulating glue to be air-dried and shaped, taking down the coil framework 4 from the chuck after shaping, removing the epoxy plate to obtain the flat coil shown in the attached drawing 1, and finishing the manufacture of the flat coil.
Claims (5)
1. A design and manufacturing method of an electromagnetic self-piercing riveting flat coil is characterized by comprising the following steps: the method comprises a design method of a flat coil and a manufacturing method of the flat coil, wherein the design method of the flat coil comprises the following steps:
(1) Establishing a riveting force model: according to the electromagnetic self-piercing riveting principle, the riveting process can be simplified into models of a discharge coil and a driving coil, the driving coil is equivalent to a double-coil calculation with different radiuses, and the positions of the two coils are respectively positioned on two sides of the average radius, so that the driving coil can be equivalent to five single-turn coils for calculation to obtain an equivalent circuit model;
(2) Solving the riveting force: neglecting the resistance of the coil, the voltage balance equation for the drive coil can be listed by the equivalent circuit model as follows:
the bit vector from S to P is
According to the Biao-Saval law, the magnetic induction intensity generated by the circular current I at the point P is
Wherein E and K are respectively the first and second full ellipse integrals, the acting force between two coaxial current-carrying ring coils is calculated, the ring center distance is set as a, and the radius and the current of the two coaxial current-carrying ring coils are respectively
，
And
，
as can be seen from the principle of the induced current,
and
in the opposite direction, using the ampere force formula
Solving is carried out, and finally the change curve of the impact force, namely the riveting force, along with the time is obtained;
the manufacturing method of the flat coil comprises the following steps:
(1) Manufacturing a framework: manufacturing a coil framework by using bakelite, designing the thickness of the coil framework according to riveting force and installation size, respectively arranging a coil winding column and a coil positioning column at two side parts of the coil framework, arranging an inner connecting column hole and a positioning screw hole on the coil framework, arranging an annular groove at the outer edge of the coil framework, and finishing the manufacturing of the coil framework;
(2) Winding a copper wire: after the coil framework is manufactured, preparing a copper wire to be wound and a binding post, wherein the binding post is divided into an inner binding post and an outer binding post, one end of the copper wire and the inner binding post are fixed by a rivet, then the inner binding post is inserted into an inner binding post hole of the coil framework, after the inner binding post is inserted and compacted, a coil positioning post of the coil framework is clamped by a four-jaw chuck, the four-jaw chuck is connected with a manual speed reducer, one person slowly shakes the speed reducer to enable the coil framework to slowly rotate, one person straightens out the copper wire, the copper wire is tightly attached to the bottom surface of the coil framework and is slowly wound on a coil winding post, in the winding process, the person responsible for winding the copper wire holds the copper wire by one hand, the other person lightly strikes the wound copper wire by a rubber hammer by the other hand to enable the copper wire to be tightly attached to the coil framework of the copper wire and to be tightly wound, after the copper wire is fully wound on the coil framework of the coil, the copper wire is tensioned, the copper wire is wound on the outer edge of the wound coil framework of the wound copper wire is fixed, a design allowance is left to cut off, the copper wire, the end is cut off the copper wire, the end of the copper wire and is connected with the outer binding post in the same connection mode, the adhesive tape, the outer edge of the adhesive tape coil framework of the adhesive tape, and the outer edge of the copper wire of the coil framework of the copper wire is fixed along the copper wire, and the outer side of the coil framework of the copper wire, and the copper wire of the copper wire wound on the outer side of the coil framework of the copper wire;
(3) Gluing and fixing: preparing insulating glue, after the preparation of the insulating glue is finished, manufacturing an inner clamping plate and an outer clamping plate, wherein the inner clamping plate and the outer clamping plate are both epoxy plates and are respectively positioned at the inner side and the outer side of a coil framework, screwing bolts in positioning screw holes, clamping and fixing the outer epoxy plate on the coil framework, clamping the coil framework on a four-jaw chuck, tightly pushing the coil framework against the end surface of the four-jaw chuck, fixing the inner epoxy plate under the clamping of the coil framework and the end surface of the chuck, brushing a layer of insulating glue on the outer edge surface of the coil framework after the fixing is finished, filling the insulating glue into the annular grooves of the coil framework, then winding a circle on the outer edge of the coil framework by using a glass ribbon, brushing the insulating glue on the glass ribbon which is just wound, continuously winding the glass ribbon, repeating the alternation in the above way until the thickness of the wound glass ribbon reaches the designed thickness of a rubber ring, forming the rubber ring, fixing an outer binding post in the rubber ring, after the gluing is finished, placing for 2-3 days, carrying out the insulating glue for air drying and shaping, taking the coil framework down from the chuck after the shaping, removing the epoxy plates, and completing the manufacturing of the coil.
2. The design and manufacture method of the electromagnetic self-piercing riveting flat coil as claimed in claim 1, characterized in that: the coil positioning structure is characterized in that the outer epoxy plate is provided with a positioning hole, a bolt is screwed in the positioning screw hole of the coil framework after penetrating through the positioning hole of the outer epoxy plate, the outer epoxy plate is fixed on the coil framework, the inner epoxy plate is provided with a limiting hole, and the inner epoxy plate is sleeved outside the coil positioning column of the coil framework through the limiting hole.
3. The design and manufacture method of the electromagnetic self-piercing riveting flat coil as claimed in claim 1 or 2, characterized in that: the insulating glue is composed of epoxy resin, polyamide resin and a toughening agent, wherein the weight ratio of the epoxy resin to the polyamide resin is 3:1, the toughening agent is dibutyl phthalate, and the weight of the toughening agent is 5% of that of the epoxy resin.
4. The design and manufacture method of the electromagnetic self-piercing riveting flat coil as claimed in claim 1 or 2, characterized in that: the bakelite is phenolic resin, and the binding post is a copper block.
5. The design and manufacture method of the electromagnetic self-piercing riveting flat coil as claimed in claim 1 or 2, characterized in that: and riveting holes are formed in the binding posts, and the copper wires and the binding posts are riveted and fixed by the rivets through the riveting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109794957B (en) * | 2019-03-12 | 2023-10-10 | 哈工大机器人（山东）智能装备研究院 | Modularized mechanical clamping arm and working method |
| US11164694B2 (en) * | 2019-09-27 | 2021-11-02 | Apple Inc. | Low-spurious electric-field inductor design |
| CN110586842B (en) * | 2019-10-16 | 2024-03-08 | 哈工大机器人（岳阳）军民融合研究院 | Electromagnetic riveting device for large-size thin-wall workpiece |
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| GB1362934A (en) * | 1972-02-04 | 1974-08-07 | Boeing Co | Apparatus for mechanically forming material |
| US5813110A (en) * | 1996-02-09 | 1998-09-29 | The Boeing Company | Low-voltage eletromagnetic riveter |
| CN101571889B (en) * | 2009-05-22 | 2011-02-16 | 哈尔滨工业大学 | Low voltage electromagnetic riveting characteristic parameter matching method |
| CN104841840B (en) * | 2015-04-24 | 2016-10-05 | 福州大学 | A kind of portable dual coil electromagnetic riveting set |
| CN105761900B (en) * | 2016-04-25 | 2018-04-13 | 福州大学 | A kind of electromagnetic riveting coil and preparation method thereof |
| CN106158226B (en) * | 2016-08-26 | 2018-02-09 | 西北工业大学 | A kind of discharge coil and preparation method thereof |
| CN106363121B (en) * | 2016-10-21 | 2018-02-09 | 福州大学 | A kind of compact electromagnetic riveting gun cooling device and its implementation |
| CN106710777B (en) * | 2017-03-15 | 2018-05-04 | 福州大学 | A kind of electro-magnetic forming loop construction and preparation method thereof |
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