CN117275866A - Wound magnetic core and magnetic core processing method - Google Patents
Wound magnetic core and magnetic core processing method Download PDFInfo
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- CN117275866A CN117275866A CN202310891533.2A CN202310891533A CN117275866A CN 117275866 A CN117275866 A CN 117275866A CN 202310891533 A CN202310891533 A CN 202310891533A CN 117275866 A CN117275866 A CN 117275866A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/04—Cores, Yokes, or armatures made from strips or ribbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
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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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
- H01F41/022—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) by winding the strips or ribbons around a coil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Power Engineering (AREA)
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- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The winding magnetic core provided by the invention is formed by winding an alloy strip, and a cutting port of a winding end section of the alloy strip forms a convex position; the welding device is provided with a welding area, wherein the welding area is arranged at the position of the intersection area of the convex position and the coiled lower layer strip, so that the cutting port is in welding and sealing fit with the surface of the magnetic core. By the arrangement of the winding magnetic core structure, the invention forms the protruding convex position based on the position of the cutting port of the applied alloy strip, can reduce the possibility of the occurrence of the fin phenomenon in the process of processing and preparation, effectively ensures that the winding magnetic core structure has the characteristic of high yield and has low production cost.
Description
Technical Field
The invention relates to the technical field of wound magnetic core processing, in particular to a wound magnetic core and a magnetic core processing method.
Background
The full-automatic winding machine is provided with a magnetic core winding and cutting device, and cutting tools in the current cutting device are all sharp knife edges which are in a straight shape and form an included angle of 90 degrees with the running direction of the strip. The cutter of the straight-line port has simple structure and high cutting efficiency of the strip, but the magnetic core wound by the strip cut by the cutter edge is easy to generate the phenomenon of fin after the spraying process.
The spraying treatment of the magnetic core is used for improving the strength of the magnetic core so as to weaken the damage of the copper wire winding process to the magnetic core, but the tilted fins after the magnetic core is sprayed can be used as a flash to damage the wound copper wire in turn, so that poor contact and even broken copper wire are caused. Therefore, the problem of warping of the sprayed magnetic core is solved through the procedure of manually polishing and back spraying in actual production, the more the number of the magnetic cores is, the more complicated the polishing and back spraying work of workers is, which definitely increases the labor intensity of the workers, prolongs the manufacturing procedure of winding and spraying the magnetic core, and improves the production cost of the magnetic core.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a winding magnetic core and a magnetic core processing method.
The winding magnetic core is formed by winding an alloy strip, and a cutting port of a winding end section of the alloy strip forms a convex position; the welding device is provided with a welding area, wherein the welding area is arranged at the position of the intersection area of the convex position and the coiled lower layer strip, so that the cutting port is in welding and sealing fit with the surface of the magnetic core.
The alloy material of the alloy strip is typically applied with respect to amorphous or nanocrystalline alloy materials.
Further, the convex position is in a V shape; the V-shaped central connection part of the convex position is in folded angle transition or arc transition.
Further, the slope range of the V-shaped bevel edge of the convex position is set to be 5-35 degrees.
Further, the convex position is in a circular arc shape.
Further, the convex positions are arranged in a semicircular shape.
Further, the welding path of the welding zone is parallel to the winding direction of the alloy strip.
Further, the welding areas are arranged in two groups along the winding direction perpendicular to the alloy strip, and the two groups of welding areas are symmetrically distributed relative to the width central position of the magnetic core.
A method of processing a magnetic core comprising the steps of: s1, inputting an alloy strip to a winding device; s2, enabling the winding device to perform winding treatment on the alloy strip; s3, when the winding standard of the magnetic core is reached, cutting the Jin Daicai end section, so that a cutting port of the tail end of the alloy strip forms a convex position; s4, welding the involution Jin Daicai; a wound core as described above is obtained.
Further, in step S3, a cutter body is used to cut the end section of the alloy strip, and the cutter body has two connecting edges and a concave position between the connecting edges; the cutting position of the cut alloy strip is formed into a convex cutting shape formed by combining the connecting edges of the two sides of the cutter body and the concave position.
In step S3, the cutting process of the alloy strip includes the following steps: placing the alloy strip between the cutter body and the cutting groove, and driving the cutter body to be connected into the cutting groove for the cutting treatment of the involution Jin Daicai; the alloy strip is divided into a first material section positioned at one side outside the cutting groove, a second material section positioned at the other side outside the cutting groove and a third material section falling into the cutting groove under the cutting pressure of the cutter body and the cutting groove; during the cutting process, the first material section of the alloy strip is subjected to cutting pressure in the direction of the cutting groove and concentrated toward the center, and/or to breaking pressure along the width direction of the alloy strip.
Further, after the cutting pressure, the cutting position of the first material section forms a convex position protruding towards the side of the cutting groove, and the convex position is arranged in a V shape or an arc shape. When the cutting position of the first material section is formed into a V-shaped convex position, the joint of the V-shaped centers of the convex positions forms arc transition; the slope range of the V-shaped bevel edge of the convex position is set to be 5-35 degrees. When the cutting position of the first material section is formed into a circular arc-shaped convex position, the convex position is arranged in a semicircular shape.
Further, during the cutting process, the second material section of the alloy strip is subjected to a cutting pressure concentrated toward the center and toward the inside of the cutting groove, and/or to a breaking pressure in the width direction of the alloy strip.
Further, in step S4, the side end face of the wound core after the welding process is subjected to a striking-off process.
Further, in step S1, the alloy strip fed to the coiling apparatus is applied with magnetic attraction, and a stable tension is provided to the alloy strip fed to the coiling apparatus to adjust the gap between layers in the coiled alloy strip.
The invention has the beneficial effects that:
by the arrangement of the winding magnetic core structure, the invention forms the protruding convex position based on the position of the cutting port of the applied alloy strip, can reduce the possibility of the occurrence of the fin phenomenon in the process of processing and preparation, effectively ensures that the winding magnetic core structure has the characteristic of high yield and has low production cost.
Based on the application of the magnetic core processing method, in the cutting treatment process of the closing Jin Daicai tail end, based on the fact that the cutting position of the alloy strip is subjected to the cutting pressure which is directed to the direction of the cutting groove (the cutter body side) and concentrated to the central position in the cutting treatment process, the cutting stress applied to the cutting position of the alloy strip in the alloy strip can be relatively concentrated to the central position of the cutting position of the alloy strip, and the degree of forming a fin at the cutting position of the alloy strip when the alloy strip is wound to prepare a wound magnetic core later can be effectively reduced. On the basis that the cutting position of the alloy strip is subjected to breaking pressure along the width direction of the alloy strip in the cutting treatment process, the strip can be gradually broken and form a gradual fault along the width direction under the action of the breaking pressure when being cut, so that the strip is effectively broken along the width direction. Therefore, the production of the wound magnetic core obtained by the production of the wound magnetic core can effectively control the edge warping phenomenon, and the production high yield of the wound magnetic core is effectively improved.
Drawings
FIG. 1 is a schematic view of an arrangement of a tape cutting apparatus of the present invention;
FIG. 2 is a schematic view of the tape cutting apparatus of the present invention;
FIG. 3 is a schematic view showing the cross-sectional configuration and shape of a strip obtained by cutting in accordance with application example 1 of the cutter body of the present invention;
FIG. 4 is a schematic view showing the cross-sectional configuration and shape of a strip obtained by cutting in accordance with application example 2 of the cutter body of the present invention;
FIG. 5 is a schematic view of an arrangement of a first magnetic core;
FIG. 6 is a schematic diagram of an arrangement of a second magnetic core;
FIG. 7 is a schematic diagram of a third magnetic core arrangement;
FIG. 8 is a schematic diagram of a fourth magnetic core arrangement;
FIG. 9 is a force analysis diagram of a first magnetic core;
FIG. 10 is a force analysis diagram of a second magnetic core;
FIG. 11 is a force analysis diagram of a third magnetic core;
FIG. 12 is a force analysis diagram of a fourth magnetic core;
FIG. 13 is a product photograph of a first magnetic core;
FIG. 14 is a product photograph of a second magnetic core;
FIG. 15 is a product photograph of a third magnetic core;
FIG. 16 is a product photograph of a fourth magnetic core;
fig. 17 is a schematic view of a magnetic core winding system of the present invention.
Reference numerals illustrate:
the cutter body 1, a cutting end face 11, a straight edge 111, a connecting edge 112, a concave position 113,
Cutting table 2, cutting groove 21, fitting gap 22,
Alloy strip 3, raised portion 30, first segment 31, second segment 32,
Wound core 4, first core 401, second core 402, third core 403, fourth core 404, cut port 41, intersection 411, V-shaped central connection 412, edge 42, weld zone 43, winding direction 44, core surface 45,
The apparatus includes a frame 51, a tape tray 52, a tape guiding device 53, a clamping mechanism 531, a roller train 532, a support table 533, a detecting device 534, a tape cutting unit 54, a core preparation unit 55, a winding device 551, a welding device 552, a knocking device 553, and a core collecting unit 56.
Detailed Description
In order to make the technical scheme, the purpose and the advantages of the invention more clear, the invention is further explained below with reference to the drawings and the embodiments.
As shown in fig. 1 to 4, a tape cutting device of the present invention is provided as follows:
including the cutter body 1 of column setting, lift drive is connected to cutter body 1 upside, cutter body 1 below sets up cutting platform 2, correspond among the cutting platform 2 the projection position of cutter body 1 sets up cutting groove 21, the shape of cutting groove 21 with the horizontal projection shape cooperation of cutter body 1, cutting groove 21 with have fit-up gap 22 between the cutter body 1 outside.
The strip is input between the cutting platform 2 and the cutter body 1, the lifting driving device drives the cutter body 1 to fall, the matching edge between the falling cutter body 1 and the cutting groove 21 forms a cutting action matched up and down on the strip, and the strip is divided into a first material section 31 positioned at one side of the discharging end of the cutting platform 2, a second material section 32 positioned at one side of the feeding end of the cutting platform 2 and a third material section falling into the cutting groove 21.
Example 1:
in a preferred embodiment, the cutter body 1 of the strip cutting device according to the invention is applied with a lower side provided with a cutting end face 11, said cutting end face 11 being provided as an inclined face having an inclination angle with respect to the horizontal plane.
When the cutter body 1 contacts the alloy strip 3 with the cutting end face 11, the cutter body 1 contacts one side edge of the alloy strip 3 in the width direction, and the concentrated stress causes the position of one side of the alloy strip 3 to be cracked and local fault to be caused; along with the falling and pushing of the cutter body 1, the cutter body 1 is guided along with the two side edges of the cutting end face 11, so that the fault breaks the strip.
Therefore, the cutting positions of the first material section 31 and the second material section 32 of the alloy strip 3 are subjected to the breaking pressure along the width direction of the alloy strip 3 by the inclined surfaces during the cutting process.
By the application of the structure, the cutter body 1 can more easily and effectively cut the alloy strip Jin Daicai 3 based on the application of breaking pressure, and the possibility that the tail end position of the alloy strip 3 has corresponding stress accumulation due to cutting fracture, so that the subsequent processing and production of the 'edge curling' of the wound magnetic core 4 are caused is reduced.
The angle of inclination of the cutting end face 11 with respect to the horizontal is in the range of 0.1 ° to 6 °, preferably set to 3 °; the inclination angle is determined depending on the cutting toughness and breaking strength of the cut alloy strip 3. The greater the cutting toughness and the higher the breaking strength of the cut alloy strip 3, the greater the desired angle of inclination of the cut end face 11 with respect to the horizontal. When the cutting toughness and the breaking strength of the cut alloy strip 3 are significantly increased, the angle range of the cut end face 11 needs to be set larger.
As a further preferred embodiment of the fit-up, the setting of the fitting gap 22 is in the range of 0.2-0.6mm, the setting size of the fitting gap 22 being determined depending on the thickness and the cutting toughness of the alloy strip 3.
The greater the thickness of the alloy strip 3, the less the cutting toughness, the greater the assembly gap 22 required. The thicker the cut alloy strip 3, the more brittle the material, the greater the range of the assembly gap.
Example 2:
in order to further reduce the possibility of "edge tilting" in the process of winding the magnetic core 4, in the structure of the cutter body 1 of the present invention, the horizontal projection shape of the cutting end face 11 is H-like, and the horizontal projection shape includes straight edges 111 vertically arranged at two sides, connecting edges 112 at four corner sides, and concave positions 113 at the central positions of two ends; the inclined direction of the inclined surface is along the connection direction of the straight sides 111. In the horizontal projection shape of the cut end surface 11, the connecting edges 112 at the four corners are all inclined toward the inner side, and the connecting edges 112 and the straight edges 111 are arranged in a circular arc transition.
As an embodiment, the concave portion 113 is V-shaped, and the V-shaped central connection portion 412 is arranged in a circular arc transition manner; the slope theta 1 of the oblique side of the V-shape is set to be 5-35 DEG with respect to the connection direction of the concave portions 113 at the opposite ends; the connecting edge 112 has a slope angle theta 2 greater than the V-shaped hypotenuse angle theta 1 And (5) setting.
Alternatively, the concave portion 113 may be circular arc, and preferably is semicircular.
Taking the connecting direction of the straight edges 111 at two sides of the cutter body 1 as the width direction and the connecting direction of the concave positions 113 at two ends as the length direction; the alloy strip 3 is centrally input along the length direction of the cutter body 1 and corresponds to the concave positions 113 at the two ends, and the width of the alloy strip 3 is within the width range of the cutter body 1. When the cutter body 1 is cut by the involution Jin Daicai 3, the centers of the cutting position tail ends of the first material section 31 and the second material section 32 of the cut alloy strip 3 form convex positions 30 protruding towards the cutting platform 2 side, and the convex positions 30 are matched with the concave positions 113 in shape; the convex portion 30 is preferably circular arc-shaped or semicircular.
Therefore, during the cutting process, the cutting positions of the first and second material sections 31 and 32 of the alloy strip 3 are subjected to the cutting pressure concentrated toward the inside of the cutting groove 21 and toward the center by the connecting edges 112 and the concave portions 113 on both sides of the cutter body 1. After the cutting pressure, the cutting positions of the first material section 31 and the second material section 32 form a convex position 30 protruding towards the inner side of the cutting groove 21, and the convex position 30 is in a V shape or an arc shape.
As shown in fig. 5 to 12, the structure of the wound magnetic core 4 obtained by winding the alloy strip 3 cut by the different cutter bodies 1 is demonstrated, and the mechanical analysis of the cutting position of the winding end section (first material section 31) of each cut alloy strip 3 is clarified.
The alloy strip 3 with the first magnetic core 401 is cut by a cutter body 1 with a square cutting end face 11, after cutting, the cutter body does not have a convex part 30, and a cut port 41 obtained by cutting is in a straight shape.
The alloy strip 3 for processing the second magnetic core 402 is cut by adopting the cutter body 1 with the V-shaped concave position 113 on the cutting end face 11, the cut cutting port 41 is V-shaped, and the V-shaped central connection part 412 of the cutting port 41 is in angle folding transition.
The alloy strip 3 for processing the third magnetic core 403 is cut by adopting the cutter body 1 with the V-shaped concave position 113 on the cutting end face 11, the cut cutting port 41 is V-shaped, and the V-shaped central connection part 412 of the concave position of the cutting port 41 has arc transition.
The alloy strip 3 with the fourth magnetic core 404 is cut by the cutter body 1 with the cutting end face 11 provided with the arc-shaped concave position 113, so that the cut port 41 is arc-shaped.
In the application of the first to fourth magnetic cores 401 to 404, the cutting ports 41 (cutting positions of the first material section 31) of the alloy strip 3 are selected in a stepwise optimized manner, wherein the cutting ports 41 of the alloy strip 3 and the widthwise opposite edges 42 of the strip form opposite junction points 411; in the preparation of the wound core 4, the weld Jin Daicai is applied by a welding process, with the weld zone 43 being located at the intersection of the bead 30 and the underlying strip, so that the cut port 41 of the respective core is in welded close engagement with the core surface 45.
The two-dimensional coordinate axes of the partial region formed by taking the direction perpendicular to the tape winding direction 44 as the x-axis direction and the direction parallel to the tape winding direction 44 as the y-axis direction are described; the welding paths of the welding areas 43 are arranged along the y-axis direction, the welding areas 43 are arranged into two groups along the x-axis direction, and the two groups of welding areas 43 are symmetrically distributed relative to the width central position of the magnetic core; the distance between the center of the connection between the two sets of welding zones 43 and the center of the two-sided junction 411 of the strip is h, h=0 in the first core 401, and h > 0 in the arrangement of the second core 402 to the fourth core 404. The distance h is set in the same direction as the x-axis direction.
Mechanical analysis is performed on the cut port 41 of the first magnetic core 401, and the mechanical analysis shows that: the direction of the force applied by the welding area 43 at the two-side intersection 411 between the two-side edges 42 of the alloy strip 3 of the first magnetic core 401 and the in-line cutting port 41 is verticalIn the direction of the strip winding 44, only a tension component perpendicular to the direction of the strip winding 44 is present, and no tension component parallel to the direction of the strip winding 44 is present, i.eF 1x ＝F，F 2x ＝-F，F 1y ＝F 2y ＝0。
Then, mechanical analysis is performed on the cut ports 41 applied to the second to fourth magnetic cores 402 to 404, and the mechanical analysis shows that: the contact points 411 of the edges 42 on both sides of the alloy strip 3 with the cutting ports 41 are each at an angle to the direction of the force exerted by the weld zone 43 and to the direction of winding 44 of the alloy strip 3, so that the application thereof has a tension component perpendicular to the direction of winding 44 of the strip and parallel to the direction of winding 44 of the strip, i.e.F 1x ＞0，F 2x ＜0，F 1y ＝F 2y > 0. When F y At > 0, junction 411 may be subjected to a pulling force acting in the direction of tape winding 44 to draw the partial tape at junction 411 closer to core surface 45.
Because of F of the first magnetic core 401 y =0, F in the second to fourth cores 402 to 404 y According to the theory, the shape of the cutting port 41 of the second to fourth magnetic cores 402 to 404 is more beneficial than the shape of the cutting port 41 of the first magnetic core 401 to improve the adhesion degree between the tape cutting port 41 and the magnetic core surface 45 and to improve the magnetic core warpage phenomenon.
The difference between the cut ports 41 of the two cores, compared to the second core 402 and the third core 403, is the V-shaped central junction 412 where the lands 30 are located, one with a corner transition and the other with an arc transition.
After the cutting position is fixed on the magnetic core surface 45 through the welding procedure, on the one hand, the magnetic core can be subjected to the action of the air flow of the spray gun in the spraying procedure, when the air flow carrying spray sol particles acts on the vertex of the V-shaped central connection part 412 of the cutting port 41 along the y-axis direction at a certain flow rate, the probability of occurrence of the eversion event of the local strip at the vertex of the V-shaped central connection part 412 of the second magnetic core 402 is increased under the action of the air flow of the spray gun due to the small acting surface area and the strong pressure of the vertex of the V-shaped central connection part 412 of the second magnetic core 402, and the bad appearance of the tilted sheet is easy to form, and the probability of occurrence of the eversion event of the local strip at the vertex of the V-shaped central connection part 412 of the third magnetic core 403 is reduced due to the relatively large acting surface area and the small pressure of the vertex of the V-shaped central connection part 412 of the third magnetic core 403, and the attaching flat state with the magnetic core surface 45 can be basically maintained.
On the other hand, the cutting port 41 of the alloy strip 3 is held by the welding area 43, the stress included angle α=180° of the V-shaped central connection 412 in the structure of the third magnetic core 403, the stress included angle α < 180 ° of the V-shaped central connection 412 in the structure of the second magnetic core 402, the alloy strip 3 at the transition point in the third magnetic core 403 can form a curved surface structure and form a fit with the magnetic core surface 45 under the tensile force of the included angle α=180°, and the strip at the transition point in the second magnetic core 402 is more prone to form a planar structure and form a certain gap with the magnetic core surface 45 under the tensile force of the included angle α < 180 °.
Therefore, the V-shaped central connection 412 of the cutting port 41 of the strip material adopts a circular arc structure to make transition more beneficial to improving the adhesion degree between the cutting port 41 of the strip material and the magnetic core surface 45 than adopting a bevel structure, and improving the bad phenomenon of fin.
The structure of the cutting port 41 of the third magnetic core 403 and the structure of the cutting port 41 of the fourth magnetic core 404 are compared in a similar way, because the stress included angle beta of the intersection point 411 of the cutting port 41 and the edges 42 on two sides of the strip in the third magnetic core 403 is smaller than 180 degrees, the area of the action surface of the intersection point 411 under the action of air flow in the spraying process is small; the forced included angle β=180° of the intersection point 411 between the cutting port 41 and the edges 42 on both sides of the strip in the fourth magnetic core 404, so that the area of the acting surface of the intersection point 411 under the action of air flow is relatively large during the spraying process; therefore, the semicircular shape structure of the cutting port 41 is more conducive to tightly attaching the cutting port 41 of the strip to the magnetic core surface 45 than the V-shaped structure with arc transition at the central joint 412, and the problem of poor appearance of the magnetic core surface 45 caused by the fins is solved.
The structural arrangement of the cutter body 1 and the width relation of the alloy strip 3 input to the cutter body are as follows:
in one aspect, the width of the alloy strip 3 is set to be larger than the arrangement width of the concave position 113 and smaller than the width setting range of the straight sides 111 at two sides; the alloy strip 3 is centrally fed into the cutting range of the cutter body 1, and the cut position of the first material section 31 of the alloy strip 3 after cutting forms a cutting shape with a convex portion 30 formed by combining the connecting edges 112 on both sides of the cutter body 1 and the concave portion 113.
The cutter body 1 is provided with a connecting edge 112 and a concave position 113 based on the horizontal projection shape of the cutting end surface 11, and an inclination progressive arrangement which is further arranged towards the center of the inner side of the cutter body 1 is arranged between the connecting edges 112 of the two sides and the concave position 113; the alloy strip 3 with wider width is respectively subjected to the cutting pressure which is directed to the direction of the cutting groove (the cutter body side) and concentrated to the central position and is brought by the connecting edge 112 and the concave position 113 when being cut, so that the cutting stress applied to the alloy strip 3 at the cutting position can be relatively concentrated to the central position of the cutting position, the structural integrity of the cutting port 41 of the alloy strip 3 can be effectively ensured, and the degree of forming a fin at the cutting position of the alloy strip 3 when the alloy strip 3 is wound to prepare a winding magnetic core later can be reduced.
On the other hand, if the width of the alloy strip 3 is optionally equal to or smaller than the concave position 113, the alloy strip 3 is centrally input into the cutting range of the cutter body 1, and then the cutting position of the first material section 31 of the cut alloy strip 3 forms a cutting shape which is the same as the concave position 113 of the cutter body 1. Preferably, the concave portion 113 of the cutter body 1 is arranged in a semicircular shape, and the width of the alloy strip 3 is equal to the diameter of the concave portion 113.
In the above examples of the application of the first to fourth magnetic cores 401 to 404, after the welding process, the photographed images are as shown in fig. 13 to 16, and the photographing direction is perpendicular to the winding direction 44 of the strip. (where Δh is the distance between the intersection 411 of both sides of the strip and the core surface 45, and Δk is the distance between the center vertex of the cut port 41 and the core surface 45.)
Obviously, Δh of the first magnetic core 401 is significantly longer than Δh in the second to fourth magnetic core 402 to 404 structures, thereby further confirming the point that the structure of the cut port 41 in the second to fourth magnetic core 402 to 404 structures is superior to that of the cut port 41 of the first magnetic core 401.
The Δk of the third magnetic core 403 is smaller than the Δk of the second magnetic core 402, thereby confirming the point that the structure of the cut port 41 of the third magnetic core 403 is superior to that of the cut port 41 of the second magnetic core 402.
By microscopic observation, Δh of the fourth magnetic core 404 was found to be slightly smaller than Δh of the third magnetic core 403, and Δk of the fourth magnetic core 404 was significantly smaller than Δk of the third magnetic core 403, thereby confirming the point that the structure of the cut port 41 of the fourth magnetic core 404 is superior to that of the cut port 41 of the third magnetic core 403.
Example 3:
as shown in fig. 17, the application of the tape cutting device is based on the above; to meet the full-process automated production requirements of wound core preparation, this embodiment further provides a core winding system for illustration.
The magnetic core winding system comprises a frame 51, and a belt material disc 52, a belt material guiding device 53, a belt material cutting part 54, a magnetic core preparation part 55 and a magnetic core collecting part 56 which are sequentially arranged in the direction from the feeding end to the discharging end of the frame 51. The coil plate 52 is used for placing a coiled disc-shaped alloy strip 3, the alloy strip 3 is driven and led out by a strip guiding device 53, and then one end of the alloy strip 3 is connected to a magnetic core preparation part 55 through a strip cutting part 54 for preparation of coiling operation.
The tape cutting portion 54 includes a tape cutting device to which the above embodiment is applied.
The strip guiding device 53 comprises a clamping mechanism 531 for clamping and driving the alloy strip 3 to move, a roller set 532 formed by combining a plurality of rollers for adjusting the output path of the alloy strip 3 is arranged between the clamping mechanism 531 and the strip material disc 52, a supporting platform 533 is arranged between the roller set 532 and the clamping mechanism 531, a detection device 534 for detecting the breakage judgment of the alloy strip 3 is arranged at the feeding end side of the supporting platform 533, and a magnetic device is arranged in the clamping mechanism 531.
The core preparation section 55 includes a winding device 551 for winding the input strip, a welding device 552 for welding the cut port 41 of the strip after the winding process and the core surface 45, and a hammering device 553 for hammering the side end face of the wound core after the welding process; then, after the input alloy strip 3 is wound in the winding device 551 to meet the standard of a specific layer number and a specific size, the alloy strip 3 is cut by the strip cutting device, and then the welding device 552 performs welding treatment on the cut port 41 of Jin Daicai and the magnetic core surface 45 formed by winding; after the welding process, the knock-out device 553 located on the side of the side end face of the molded wound core presses against the side end face of the core, and the knock-out process is performed on the wound core.
After the alloy strip 3 is comprehensively processed in the magnetic core preparation part 55, an independent wound magnetic core product is formed, and the wound magnetic core product is uniformly collected by the magnetic core collecting part 56; the core collecting unit 56 includes a receiving guide groove for guiding the movement of the wound core outputted from the core preparing unit 55, and a receiving tray is provided at the guide end of the receiving guide groove.
The operation of the magnetic core winding system is described as follows:
1) Rolling the alloy strip 3 cut according to the required width into a raw material disc, placing the rolled raw material disc in a belt material disc 52 in a mode of being vertical to the horizontal plane, and leading out one end of the alloy strip 3 from the outermost side of the raw material disc;
2) The alloy strip 3 led out from the strip material disc 52 sequentially passes through rollers at different positions in the roller group 532 to guide the alloy strip 3 to be output, and the output alloy strip 3 is in a continuously and smoothly moving state in the transmission and position application of the rollers;
3) The alloy strip 3 output by the roller group 532 reaches the supporting platform 533, and the detection device 534 at the feeding end side of the supporting platform 533 detects and judges whether the continuous alloy strip 3 breaks before reaching the supporting platform 533; if the fracture condition is found, an instruction is required to be sent to the control panel, so that an alarm prompt is given;
4) The alloy strip 3 passing through the detection device 534 passes through the supporting platform 533 and is connected to the clamping mechanism 531, and under the bearing of the supporting platform 533, the alloy strip 3 sections between the supporting platform 533 and the winding device 551 are positioned at the same horizontal plane position, so that the clamping mechanism 531 can be ensured to effectively guide the alloy strip 3 into the winding device 551 directly through translation operation, and the stability of strip tension control due to the self gravity of local strips in the area is avoided;
5) One end of the alloy strip 3 extends out of the clamping mechanism 531, and under the clamping and guiding action of the clamping mechanism 531, the extending alloy strip 3 section passes through a position between the lower side of the cutter body 1 and the cutting platform 2 and reaches the output end of the strip cutting device; in the clamping process of the clamping mechanism 531, the magnetic device is electrified, so that the clamping mechanism 531 has certain magnetic adsorption capacity, and the stability of clamping the strip is ensured more effectively.
6) The strip cutting device executes a cutting command for the first time; after cutting, the head end of the alloy strip 3 is cut with a cutting port 41 of a specific shape; driving the clamping mechanism 531 to displace along the horizontal direction, wherein the output end of the clamping mechanism 531 drives alloy raw materials cut out of the cutting port 41 to be pushed into the winding device 551 through the position of the strip cutting device, the core mould in the winding device 551 stretches out, and the cutting port 41 abutting against the head end of the alloy strip 3 is fixed by the notch;
7) After the first end of the alloy strip 3 is fixed in the core mold, the clamping mechanism 531 releases the clamping restriction on the alloy strip 3 and returns to the input end side of the strip cutting device; the core mould starts to rotate around the shaft, and the magnetic core starts to wind; in the winding process, the magnetic devices in the clamping mechanism 531 still continuously adsorb the raw material strips, provide continuous and stable tension for the input wound alloy strip 3, and adjust the gap between the layers of the wound alloy strip 3 so as to obtain proper winding tightness of the wound magnetic core obtained by processing;
8) The outer diameter limiter is arranged on the periphery of the winding device 551, when the outer diameter of the magnetic core is detected to be wound to the target size, a signal is transmitted to the core mold, and the magnetic core stops winding;
9) After the winding of the magnetic core is stopped, the strip cutting device starts the cutting action again to finish the end port cutting of the alloy strip 3;
10 After the re-cutting operation is completed, the welding device 552 contacts the outer surface of the magnetic core, the auxiliary rotation of the core mold is controlled, the welding device 552 completes the operation of double-line welding on the periphery of the magnetic core, and the strip cutting port 41 of the inner ring of the magnetic core is subjected to spot welding to complete the welding of the magnetic core;
11 A knocking device 553 is driven, and the knocking device 553 presses and knocks the magnetic core by a mechanism positioned at the winding end surface positions at two sides of the magnetic core; the height of the magnetic core is controlled to fluctuate within a positive tolerance range of the width of the strip, and the risk of collision and breakage of the strip protruding partially from the magnetic core in the production process is reduced, so that the appearance of a finished product of the magnetic core is affected;
12 After the end face of the magnetic core is knocked flat, the core mould is retracted, the coiled magnetic core falls into the material receiving guide groove, and the magnetic core slides into the material receiving tray along the inclined direction of the material receiving guide groove;
13 A command returns to step 6) to connect the head end of the next alloy strip 3 cut by the clamping device into the mandrel and continue to start winding the core;
14 Repeating the above operation until the number of winding cores reaches the required number, and commanding termination.
The foregoing is merely a preferred embodiment of the present invention, and modifications of the embodiments described above can be made by those skilled in the art without departing from the implementation principles of the present invention, and the corresponding modifications should also be considered as the protection scope of the present invention.
Claims (10)
1. The winding magnetic core is characterized by being formed by winding an alloy strip, wherein a cutting port of a winding end section of the alloy strip forms a convex position; the welding device is provided with a welding area, wherein the welding area is arranged at the position of the intersection area of the convex position and the coiled lower layer strip, so that the cutting port is in welding and sealing fit with the surface of the magnetic core.
2. The wound core of claim 1, wherein the protrusions are V-shaped.
3. The wound core of claim 2, wherein the V-shaped central junction of the lands transitions in a dog-leg or circular arc.
4. A wound core as claimed in claim 2, wherein the V-shaped bevel of the projection has a slope in the range 5 ° -35 °.
5. The wound core of claim 1, wherein the protrusion is rounded.
6. The wound core of claim 5, wherein the protrusions are semi-circular in configuration.
7. A wound core as claimed in any one of claims 1 to 6, wherein the weld path of the weld zone is parallel to the winding direction of the alloy strip.
8. The wound core of claim 7, wherein the weld zones are arranged in two groups in a direction perpendicular to the winding direction of the alloy strip, the weld zones of two groups being symmetrically distributed with respect to a widthwise central position of the core.
9. The magnetic core processing method is characterized by comprising the following steps of:
s1, inputting an alloy strip to a winding device;
s2, enabling the winding device to perform winding treatment on the alloy strip;
s3, when the winding standard of the magnetic core is reached, cutting the Jin Daicai end section, so that a cutting port of the alloy strip forms a convex position;
s4, performing welding treatment on the coiled alloy strip; a wound core as claimed in any one of claims 1 to 8.
10. The method of claim 9, wherein in step S3, a cutter body is used to cut the end of the alloy strip, the cutter body has two connecting edges and a concave position between the connecting edges; the cutting position of the cut alloy strip is formed into a convex cutting shape formed by combining the connecting edges of the two sides of the cutter body and the concave position.
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| CN202310630456.5A CN116329668B (en) | 2023-05-31 | 2023-05-31 | Alloy strip cutting method, magnetic core processing method and magnetic core processing system |
| CN202310891533.2A CN117275866A (en) | 2023-05-31 | 2023-05-31 | Wound magnetic core and magnetic core processing method |
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| US4297775A (en) * | 1980-05-08 | 1981-11-03 | The Trane Company | Method for joining two plate type heat exchanger core sections with an intermodular layer for improved heat transfer |
| JP2006021310A (en) * | 2004-07-07 | 2006-01-26 | Kotobuki Seisakusho:Kk | Thin plate-like material deburring method and deburring device |
| US8062094B2 (en) * | 2005-06-29 | 2011-11-22 | Deere & Company | Process of durability improvement of gear tooth flank surface |
| CN101780562B (en) * | 2010-03-08 | 2013-10-23 | 北方工业大学 | A device and method for adjusting the gap between the scissors of a disc shearing machine |
| US9153364B2 (en) * | 2012-12-07 | 2015-10-06 | Kent E. Parker | Apparatus and method for stripping insulation lengthwise fom electrical wires and cables |
| CN110562785A (en) * | 2014-01-10 | 2019-12-13 | 深圳市宝尔威精密机械有限公司 | Driving mechanism of material belt connecting machine |
| CN114888525A (en) * | 2022-03-29 | 2022-08-12 | 山东金博利达精密机械有限公司 | Production process of C or U-shaped steel photovoltaic support |
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