TW201830422A - Magnetic core manufacturing method performing cutting groove formation, bottom shaping of the cutting groove, and complete cut off of the magnetic body - Google Patents

Abstract

This invention aims to design a magnetic core which can be efficiently produced as desired. This invention comprises: a holding process for holding a plate-like magnetic body (1) with a holding table (13); a groove forming process for making the first cutter (32) cut into the magnetic body (1) held by the holding table (13) with a specified depth and perform cut-feeding along the cut-feeding direction to form a cutting groove (2); a groove shaping process for making a second cutter (34) harder than the first cutter (32) and having a width greater than that of the first cutter (32) cut into the cutting groove (2) to perform cut-feeding to shape the bottom of the cutting groove (2); and a cutting process for making a third cutter (35) cut along a direction orthogonal to the cutting groove (2) so as to perform cut-feeding and cut off the magnetic body (1) completely; in the state that the magnetic body (1) is held by the holding table (13), this invention can perform cutting groove (2) formation, bottom shaping of the cutting groove (2), and complete cut off of the magnetic body (1), therefore obtaining a plurality of concave magnetic cores (3) from the magnetic body (1) to thereby increase the production efficiency of the magnetic cores (3).

Description

Manufacturing method of magnetic core

The present invention relates to a method for manufacturing a magnetic core.

The magnetic core is made of a magnetic material (for example, ferrite), and is incorporated into an electronic device and used as a transformer or a coil. The magnetic core includes various shapes such as E-type core, ER-type core, PQ-type core, LP-type core, and RM-type core. For example, when manufacturing an E-type magnetic core, the magnetic material is placed in a predetermined mold frame and baked to form a desired E-type, and then the magnetic core is held by a holding table, and the end face of the magnetic core is made of vermiculite, etc. Grinding is performed to produce a magnetic core having a desired shape (for example, refer to Patent Documents 1 to 3 below). [Prior Art Literature] [Patent Literature]

[Patent Document 1] JP 06-297306 [Patent Document 2] JP 08-148361 [Patent Document 3] JP 2002-231541

[Problems to be solved by the invention]

However, in the above-mentioned manufacturing method, the cores of a desired shape are formed one at a time with a predetermined mold frame, and the cores are held by a holding table one at a time to grind the end faces of the cores. The problem of poor core production efficiency.

The present invention has been developed in view of the above circumstances, and an object of the present invention is to be designed so that a desired magnetic core can be efficiently manufactured. [Technical means to solve the problem]

The present invention relates to a manufacturing method of a concave magnetic core made of a magnetic material, and includes: a holding process for holding a plate-shaped magnetic body on a holding table; and a groove forming process for forming a first formed in a predetermined width. The cutting blade cuts into the magnetic body held by the holding table at a predetermined cutting depth and cuts and feeds in the cutting feed direction to form a cutting groove; and the groove shaping process is made to be harder than the first cutting blade and the first cutting blade The second cutting blade formed by the above-mentioned wide width cuts into the cutting groove and cuts and feeds the cutting feed direction to shape the bottom surface of the cutting groove; and the cutting process makes the third cutting knife face orthogonal to the cutting groove Cut in the direction and feed it to cut the magnetic body completely.

In addition, the present invention is a method for manufacturing an E-type magnetic core composed of a magnetic material, and includes: a holding process for holding a plate-shaped magnetic body on a holding table; and a groove forming process for forming the magnetic body in a predetermined width. The first cutting blade cuts into the magnetic body held by the holding table with a predetermined cutting depth and cuts and feeds in the cutting feed direction to form two cutting grooves; and the groove shaping process is made to be harder than the first cutting blade and The second cutting blade having a width larger than the first cutting blade is cut into the two cutting grooves and is cut and fed in the cutting feeding direction to shape the bottom surface shape of the two cutting grooves; The upper surface of the convex portion between the two cutting grooves, or the predetermined surface that will become the upper surface of the convex portion between the two cutting grooves, is cut; It cuts in the direction orthogonal to the two said cutting grooves, and cuts and feeds in a cutting feed direction, and a magnetic body is completely cut | disconnected. [Effect of the invention]

A manufacturing method of a concave magnetic core made of a magnetic material according to the present invention includes: a holding process for holding a plate-shaped magnetic body by a holding table; and a groove forming process for a first cutting formed in a predetermined width. The knife cuts into the magnetic body held by the holding table at a predetermined cutting depth and cuts and feeds in the cutting feed direction to form a cutting groove; and the groove shaping process is made to be harder than the first cutting knife and more than the first cutting knife The second cutting blade formed by a wide width is cut into the cutting groove and is cut and fed in the cutting feed direction to shape the bottom surface of the cutting groove; and the cutting process is such that the third cutting knife faces the direction orthogonal to the cutting groove The magnetic body is completely cut by cutting and feeding, so that the plate-shaped magnetic body can be held by the holding table to form the cutting groove and shape the bottom surface of the cutting groove and complete the magnetic body. It is cut, so that a plurality of concave cores can be obtained from the magnetic body. In this way, the production efficiency of the concave magnetic core will be improved.

In addition, the method for manufacturing an E-type magnetic core made of a magnetic material according to the present invention includes: a holding process for holding a plate-shaped magnetic body on a holding table; and a groove forming process for forming the magnetic body in a predetermined width. The first cutting blade cuts into the magnetic body held by the holding table with a predetermined cutting depth, and cuts and feeds in the cutting feed direction to form two cutting grooves; and the groove shaping process is made to be harder than the first cutting blade and the A second cutting blade formed by a width larger than the first cutting blade is cut into the two cutting grooves and is cut and fed in the cutting feed direction to shape the bottom surface shape of the two cutting grooves; and the grinding process, the 2 The upper surface of the convex portion between the cutting grooves, or the predetermined surface of the upper surface of the convex portion between the two cutting grooves, is to be ground; The two cutting grooves are cut in orthogonal directions and are cut and fed in the cutting feed direction to completely cut off the magnetic body; therefore, two cuttings can be performed while the plate-shaped magnetic body is held by the holding table. Formation of ditch with 2 cuts Grinding and completely cut off the top of the magnetic body portion between the convex shaping of the groove bottom shape with two cutting grooves, it is possible to obtain a plurality of E-shaped magnetic core from the body. In this way, the production efficiency of the E-type magnetic core will be improved.

1 Cutting device The cutting device 10 shown in FIG. 1 is an example of a processing device capable of manufacturing a magnetic core having a predetermined shape made of a magnetic material. The cutting device 10 includes a device base 11. On the upper surface 11 a of the device base 11, a rectangular holding table 13 having a holding surface 13 a for holding a plate-shaped magnetic body is arranged, and the holding table 13 is directed toward the cutting feed direction. (X-axis direction) A cutting feed means 20 for cutting feed. The holding table 13 is rotatably supported by a rotation support table 14 disposed above the cutting feeding means 20. A suction source (not shown) is connected to the holding surface 13 a of the holding table 13.

The cutting feed means 20 includes a ball screw 21 extending in the X axis direction, a motor 22 connected to one end of the ball screw 21, a pair of guide rails 23 extending parallel to the ball screw 21, and a horizontal direction in the X axis direction.地 移 的 移动 基 台 24。 Mobile ground 24. On the upper surface of the moving base 24, a rotary support table 14 supporting the holding table 13 is erected. A pair of guide rails 23 are in sliding contact with the lower surface of the moving base 24, and a ball screw 21 is screwed into a nut formed in the center of the moving base 24. In addition, the ball screw 21 is rotated by being driven by the motor 22, whereby the holding table 13 and the moving base 24 can be moved along the guide rail 23 in the X-axis direction.

A gate-shaped post frame 12 is erected at the rear of the device base 11 in the X-axis direction so as to straddle the cutting feed means 20. A first cutting means 30A that forms a cutting groove in the magnetic body, a second cutting means 30B that shapes the bottom surface of the cutting groove formed in the magnetic body, and a The third cutting means 30C whose bottom surface shape has been cut by the shaped magnetic body, and the index feeding means for indexing feeding the first cutting means 30A and the second cutting means 30B in the index feeding direction (Y-axis direction) 40A, and the indexing feeding means 40B that feeds the third cutting means 30C in the indexing feed direction, and the first cutting means 30A, the second cutting means 30B, and the third cutting means 30C in the cutting feed direction ( Z-axis direction) Cut-in feeding means 50A, 50B, 50C for cut-in feeding.

The index feeding means 40A and 40B each include a ball screw 41 extending in the Y-axis direction, a motor 42 connected to the tip of the ball screw 41, and a guide rail 43 extending parallel to the ball screw 41. The indexing feeding means 40A includes two moving plates 44a that move the first cutting means 30A and the second cutting means 30B in the Y-axis direction, and the indexing feeding means 40B includes the third cutting means 30C in the Y-axis direction. Move the moving plate 44b. Each guide rail 43 is slidably connected to the side of the moving plates 44a and 44b, and a ball screw 41 is screwed into a nut system formed at the center of the moving plates 44a and 44b. When the motor 42 of the indexing feeding means 40A is driven and the ball screw 41 is rotated, the first cutting means 30A and the second cutting means 30B and the two moving plates 44a can be indexed and fed simultaneously in the Y-axis direction. On the other hand, when the motor 42 of the indexing and feeding means 40B is driven and the ball screw 41 is rotated, the third cutting means 30C and the moving plate 44b can be indexed and fed together in the Y-axis direction. In the present embodiment, the first cutting means 30A and the second cutting means 30B are configured to move in the Y-axis direction at the same time, but the configuration is not limited to this.

The cut-in feeding means 50A and 50B are each attached to each moving plate 44a. The cut-in feeding means 50A and 50B each include a ball screw 51 extending in the Z-axis direction, a motor 52 connected to one end of the ball screw 51, a pair of guide rails 53 extending parallel to the ball screw 51, and a first Each of the cutting means 30A and the second cutting means 30B raises and lowers the plate 54a in the Z-axis direction. A pair of guide rails 53 are slidably connected to a side portion of the lifting plate 54a, and a ball screw 51 is screwed into a nut system formed at a central portion of the lifting plate 54a. Once the motor 52 of the feed means 50A and 50B is driven and the ball screw 51 is rotated, the lifting plate 54a is guided by the guide rail 53 and moves in the Z-axis direction. The first cutting means 30A and the second cutting means 30B can be moved toward each other. Z axis direction is cut into the feed. On the other hand, the cut-in feeding means 50C is mounted on the moving plate 44b. The cut-in feeding means 50C includes a lifting plate 54b for raising and lowering the third cutting means 30C in the Z-axis direction. The structure other than the lifting plate 54b is similar to the cut-in feeding means 50A. A pair of guide rails 53 are slidably connected to the side of the lifting plate 54b, and a ball screw 51 is screwed into a nut system formed at the central portion of the lifting plate 54b. Once the ball screw 51 is driven and rotated by the motor 52 that cuts into the feeding means 50C, the lifting plate 54b is guided by the guide 53 and moves in the Z axis direction, and the third cutting means 30C can be cut into the Z axis and fed. .

The first cutting means 30A includes at least a spindle 31 having a shaft center in a rotation axis direction (Y-axis direction), and a first cutting blade 32 attached to a leading end of the spindle 31. As shown in FIG. 2 (b), the first cutting blade 32 is composed of a disc-shaped vermiculite obtained by fixing a predetermined particle with a binder and sintering the predetermined particle. Examples of the bonding agent include metal bonding, vitrified bonding, and resin bonding. When metal bonding is used as the bonding agent, for example, a bonding agent based on an alloy that is not affected by magnetic forces such as cobalt (Co) or nickel (Ni) is preferably used. The thickness of the first cutting blade 32 is not particularly limited, and the thickness can be appropriately changed according to the shape of the magnetic core to be manufactured. The first cutting blade 32 cuts the magnetic body held by the holding table 13 along the longitudinal direction of the magnetic body and cuts it, thereby forming a concave cutting groove extending in the longitudinal direction.

The second cutting means 30B includes at least a mandrel 31 and a second cutting blade 34 attached to a leading end of the mandrel 31. The second cutter 34 is a disc-shaped vermiculite formed by electrodeposition of diamond particles on the surface of the base 33 shown in FIG. 2 (c). The second cutting blade 34 is harder than the first cutting blade 32 described above. In addition, the diamond grains are less likely to fall off, and are formed with a width larger than that of the first cutting blade 32. Here, the surface state of the bottom surface of the cutting groove formed by the first cutting blade 32 is rough, and an intersection portion (corner portion) of the bottom surface of the cutting groove and a side surface connected to the cutting groove is, for example, R-shaped. Therefore, the second cutting blade 34 is harder than the first cutting blade 32 and has a larger width than the first cutting blade 32, so that both outer surfaces of the second cutting blade 34 can be brought into contact with each other to perform the first cutting. The blade 32 cuts both inner sides of the groove after cutting to cut in, and shapes the bottom surface into a desired shape. The base 33 is preferably an object that is not affected by magnetic force, for example, an aluminum base.

As shown in FIG. 2 (d), the third cutting means 30C includes at least a mandrel 31 and a third cutting blade 35 mounted on the leading end of the mandrel 31. The third cutter 35 is formed to have a smaller width than the first cutter 32, and is formed of a thin plate-shaped vermiculite formed by fixing a predetermined particle with a binder and sintering it. . The third cutting blade 35 is cut in a direction orthogonal to the extending direction of the cutting groove, thereby cutting the magnetic body completely.

2 First Example of Manufacturing Method of Magnetic Core Next, a method of manufacturing a concave magnetic core made of a magnetic material by cutting the plate-shaped magnetic body 1 using the cutting device 10 described above will be described. The magnetic body 1 is an example of a magnetic material before being divided into a concave magnetic core, and is formed of, for example, a rectangular ferrite.

(1) The maintenance process is performed in a state where the long side direction of the holding table 13 shown in FIG. 1 is facing the cutting feed direction (X-axis direction), as shown in FIG. 2 (a), in a direction parallel to the long side direction of the holding table 13 In the direction, the magnetic body 1 is placed on the holding surface 13 a of the holding table 13, and the attraction force of a suction source (not shown) acts on the holding surface 13 a to attract and hold the magnetic body 1 on the holding surface 13 a.

(2) After the holding process is performed in the trench formation process, the holding table 13 holding the magnetic body 1 is cut and fed, for example, in the + X direction by the cutting and feeding means 20 shown in FIG. 1 to move the holding table 13 to the first position. Under the cutting means 30A, the indexing feeding means 40A moves the first cutting means 30A to a position above the position where the first cutting blade 32 should cut into the magnetic body 1 (the central portion of the magnetic body 1).

As shown in FIG. 2 (b), the mandrel 31 rotates, so that the first cutting blade 32 rotates, for example, in the direction of arrow A. At the same time, the first cutting blade 32 is aligned with the magnetic body 1 by the cutting-in feeding means 50A shown in FIG. For example, the feed is cut in the -Z direction, the first cutting blade 32 is cut into the magnetic body 1 with a predetermined cutting depth, and the holding table 13 is cut and fed in the + X direction, for example, while the first cutting blade 32 is gradually sharpening the center of the magnetic body 1. In part, a concave cutting groove 2 extending in the X-axis direction is formed. The surface state of the bottom surface 2a of the cutting groove 2 is rough, and an intersection portion (corner portion) of the bottom surface 2a of the cutting groove 2 and a side surface connected to the cutting groove 2 is, for example, R-shaped.

(3) Trench shaping process After the trench formation process is performed, the second cutting blade 34 is positioned directly above the cutting trench 2 by the index feeding means 40A shown in FIG. 1. As shown in FIG. 2 (c), the mandrel 31 is rotated, and the second cutting blade 34 is rotated, for example, in the direction of arrow A. At the same time, the second cutting blade 34 is placed on the magnetic body 1 by the cutting-in feeding means 50B shown in FIG. For example, the feed is cut in the -Z direction, the second cutting blade 34 is cut into the cutting groove 2, the holding table 13 is cut and fed, for example, in the + X direction, and the second cutting blade 34 gradually grinds the bottom surface 2a of the cutting groove 2. Shape the bottom surface of 2. In this way, the bottom surface 2a of the cutting groove 2 becomes flat, and the corner portion of the R shape is removed. Therefore, the shape of the bottom surface of the cutting groove 2 is adjusted to a desired state. In this way, the magnetic body 1 is maintained in a state of extending in the X-axis direction and the cross section is formed into a desired concave shape.

(4) Cutting process After the trench shaping process is performed, the holding table 13 is rotated by, for example, 90 ° by the rotating support table 14 shown in FIG. 1, thereby increasing the length of the magnetic body 1 as shown in FIG. 2 (d). The side direction is toward the Y-axis direction. By the index feeding means 40B shown in FIG. 1, the third cutting means 30C is moved to a predetermined position where the third cutting blade 35 cuts the magnetic body 1.

Next, the mandrel 31 is rotated to rotate the third cutter 35 in, for example, the direction of arrow A, and at the same time, the third cutter 35 is directed to the magnetic body 1 in the -Z direction, for example, by the feeding means 50C shown in FIG. 1. Cut-in feed is performed, the third cutting blade 35 is cut in a direction orthogonal to the extending direction (Y-axis direction) of the cutting groove 2, and the holding table 13 is cut-feeded, for example, in the + X direction to completely cut the magnetic body 1, Thereby, the concave magnetic core 3 is divided. Then, the indexing feeding means 40B shown in FIG. 1 feeds the third cutting means 30C at a predetermined interval, for example, in the -Y direction, and repeatedly performs the above-mentioned cutting operation, thereby manufacturing a plurality of pieces from the magnetic body 1. Concave core 3.

As described above, according to the first example of the manufacturing method of the magnetic core, a groove forming process is performed, and the first cutting blade formed in a predetermined width is ordered while the plate-shaped magnetic body 1 is held by the holding table 13. 32 cuts into the magnetic body 1 at a predetermined cutting depth, and cuts and feeds the cutting grooves 2 to form cutting grooves 2; and the groove shaping process is made harder than the first cutting blade 32 and formed in a width larger than the first cutting blade 32 The second cutting blade 34 cuts into the cutting groove 2 and feeds it in the cutting feed direction to shape the bottom surface of the cutting groove 2; and the cutting process makes the third cutting blade 35 perpendicular to the extending direction of the cutting groove 2 The magnetic body 1 is completely cut by cutting in the direction and cutting and feeding; therefore, a plurality of concave cores 3 can be obtained from the magnetic body 1 extending in the cutting and feeding direction (X-axis direction), and the production efficiency of the magnetic core 3 will be improved.

3 Second Example of Manufacturing Method of Magnetic Core Next, a method of manufacturing an E-type magnetic core composed of a magnetic material by cutting the plate-shaped magnetic body 4 using the cutting device 10 described above will be described. The magnetic body 4 is an example of a magnetic material before being divided into an E-shaped magnetic core. Like the magnetic body 1 described above, the magnetic body 4 is made of, for example, a rectangular ferrite.

(1) The maintenance process is performed in a state where the long side direction of the holding table 13 shown in FIG. 1 is facing the cutting feed direction (X-axis direction), as shown in FIG. 3 (a), in a direction parallel to the long side direction of the holding table 13 In the direction, the magnetic body 4 is placed on the holding surface 13 a of the holding table 13, and the attraction force of a suction source (not shown) acts on the holding surface 13 a to attract and hold the magnetic body 4 on the holding surface 13 a.

(2) After the holding process is performed in the trench formation process, the holding table 13 holding the magnetic body 4 is cut and fed, for example, in the + X direction by the cutting and feeding means 20 shown in FIG. 1 to move the holding table 13 to the first position. The lower side of the cutting means 30A. In the second example, in order to leave the central portion of the magnetic body 4, cutting grooves are formed on both outer sides (the side in the ± Y direction) of the central portion, and the first cutting means 30A is moved by the index feeding means 40A. The first cutting blade 32 should be cut above the position at two positions of the magnetic body 4. The two positions refer to a position shifted from the center portion of the magnetic body 4 by a predetermined distance toward the + Y direction side and a position shifted from the center portion of the magnetic body 4 by a predetermined distance toward the -Y direction side.

The indexing feed means 40A is used to position the first cutting blade 32 to a position that is deviated from the center of the magnetic body 4 by a predetermined distance, for example, toward the + Y direction side, and then the spindle 31 is rotated to make the first cutting blade 32, for example, While rotating in the direction of the arrow A, the first cutting blade 32 is fed to the magnetic body 4 in the -Z direction by the cutting feeding means 50A shown in FIG. 1, and the fourth cutting blade 32 is cut at a predetermined cutting depth. The magnetic body 1 feeds the holding table 13 in the + X direction, for example, and the first cutting blade 32 gradually grinds the outside (+ Y direction side) of the central portion of the magnetic body 4 to form a concave cutting groove extending in the X-axis direction. 5.

Next, the indexing feeding means 40A is used to position the first cutting blade 32 at a position deviated from the center of the magnetic body 4 by a predetermined distance, for example, toward the -Y direction side, and perform the groove forming operation as described above. The cutting blade 32 gradually grinds the outside (-Y direction side) of the central portion of the magnetic body 4 to form a concave cutting groove 6 extending in the X-axis direction. The surface states of the bottom surfaces 5a, 6a of the cutting grooves 5, 6 are rough, and the intersections (corner portions) of the bottom surfaces 5a, 6a of the cutting grooves 5, 6 and the side surfaces connected to them are formed in an R shape, for example. A convex portion 7 extending in the X-axis direction is formed between the two cutting grooves 5 and 6 formed in this manner.

(3) After the trench forming process is performed, the second cutting blade 34 is positioned, for example, directly above the cutting trench 5 by the index feeding means 40A shown in FIG. 1, as shown in FIG. 3 (c). When the mandrel 31 rotates, the second cutter 34 is rotated, for example, in the direction of arrow A. At the same time, the second cutter 34 is cut and fed to the magnetic body 4 by, for example, the cutting feed means 50B shown in FIG. 1. The second cutting blade 34 is caused to cut into the cutting groove 5, and the holding table 13 is cut and fed, for example, in the + X direction. The second cutting blade 34 gradually grinds the bottom surface 5 a of the cutting groove 5 to shape the bottom surface of the cutting groove 5. Next, the indexing feeding means 40A shown in FIG. 1 is used to position the second cutting blade 34 directly above the cutting groove 6 and then perform the shaping operation as described above. The second cutting blade 34 gradually grinds the cutting groove 6. The bottom surface 6 a shapes the bottom surface of the cutting groove 6. In this way, the bottom surfaces 5a and 6a of the cutting grooves 5 and 6 become flat and the corners of the R shape are removed. Therefore, the bottom surface shapes of the cutting grooves 5 and 6 are adjusted to a desired state.

(4) Grinding process As shown in FIG. 3 (d), for example, the upper surface 7a of the convex portion 7 between the two cutting grooves 5, 6 is ground using the second cutting means 30B. Specifically, the second cutting blade 34 is positioned directly above the convex portion 7 of the magnetic body 4 by the index feeding means 40A shown in FIG. 1. Thereafter, the mandrel 31 is rotated to rotate the second cutter 34 in, for example, the direction of arrow A, and at the same time, the second cutter 34 is cut into and fed to the magnetic body 4 in the -Z direction by the feed means 50B, and the convex The upper surface 7a of the portion 7 is ground by a predetermined amount. Then, the holding table 13 is cut and fed, for example, in the + X direction, and the second cutting blade 34 gradually sharpens the upper surface 7a of the convex portion 7 to reduce the height of the upper surface 7a. In this manner, the magnetic body 4 is maintained in a state of extending in the X-axis direction and the cross section is formed into a desired E-shape.

Although the above-mentioned grinding process is described as being performed after the groove shaping project, it is not limited to this, and the grinding process may be performed after the groove forming process and before the groove shaping project. In addition, after the maintenance project is implemented, the grinding project is performed first, and then the trench formation project and the trench shaping project are sequentially performed. When the grinding process is performed in this order, it is a predetermined surface (the central portion of the magnetic body 4) that will be the upper surface 7a of the convex portion 7 between the two cutting grooves 5, 6 formed in the subsequent groove formation process. (Top surface) The first cutter 32 or the second cutter 34 is used for grinding.

(5) Cut-off process After all the above-mentioned processes are completed, the holding table 13 is rotated by, for example, 90 ° by the rotating support table 14 shown in FIG. 1, thereby making the length of the magnetic body 4 as shown in FIG. 3 (e). The side direction is toward the Y-axis direction. By the index feeding means 40B shown in FIG. 1, the third cutting means 30C is moved to a predetermined position where the third cutting blade 35 cuts the magnetic body 4.

Next, the mandrel 31 is rotated to rotate the third cutter 35 in the direction of arrow A, and at the same time, the third cutter 35 is directed to the magnetic body 4 in the -Z direction, for example, by the feeding means 50C shown in FIG. 1. Cut in and feed the third cutter 35 in a direction orthogonal to the extension direction (Y-axis direction) of the cutting grooves 5 and 6, and cut and feed the holding table 13 in the + X direction, for example, to completely cut the magnetic body 4 Off, thereby dividing the E-shaped magnetic core 8. Then, the indexing feeding means 40B shown in FIG. 1 feeds the third cutting means 30C at a predetermined interval, for example, in the -Y direction, and simultaneously repeats the above-mentioned cutting operation to produce a plurality of pieces from the magnetic body 4. E-type magnetic core 8.

As described above, in the second example of the manufacturing method of the magnetic core, a groove forming process is performed, and the first cutting blade formed in a predetermined width is ordered while the plate-shaped magnetic body 4 is held by the holding table 13. 32 cuts into the magnetic body 4 at a predetermined cutting depth, and cuts and feeds them in the cutting feed direction to form two cutting grooves 5, 6; and the groove shaping process is made harder than the first cutting blade 32 and the first cutting blade 32 or more The second cutting blade 34 formed by a large width is cut into the cutting grooves 5 and 6 and is cut and fed in the cutting feed direction to shape the bottom surface shape of the cutting grooves 5 and 6; and the grinding process is to cut the two cutting grooves 5 and 6 The upper surface 7a of the convex portion 7 between the two or the predetermined surface of the upper surface 7a of the convex portion 7 between the two cutting grooves 5 and 6 is ground by the first cutter 32 or the second cutter 34; and Cutting process, the third cutting blade 35 is cut in a direction orthogonal to the extending direction of the cutting grooves 5 and 6 and is cut and fed to completely cut the magnetic body 4; therefore, it can be extended from the cutting feed direction (X-axis direction) The magnetic body 4 obtains a plurality of E-shaped magnetic cores 8, and the production efficiency of the magnetic cores 8 will be improved.

1‧‧‧ magnetic body

2‧‧‧ cutting groove

3‧‧‧ core

4‧‧‧ magnetic body

5, 6‧‧‧ cutting groove

7‧‧‧ convex

8‧‧‧ core

10‧‧‧ cutting device

11‧‧‧ device base

11a‧‧‧above

12‧‧‧ Post

13‧‧‧holding table

13a‧‧‧ keep face

14‧‧‧Rotary support

20‧‧‧ Cutting feed means

21‧‧‧ball screw

22‧‧‧ Motor

23‧‧‧Guide

24‧‧‧ Mobile Abutment

30A‧‧‧The first cutting method

30B‧‧‧ 2nd cutting method

30C‧‧‧3rd cutting method

31‧‧‧ mandrel

32‧‧‧The first cutter

33‧‧‧ abutment

34‧‧‧ 2nd Cutter

35‧‧‧3rd cutter

40A, 40B‧‧‧ graduated feeding means

41‧‧‧ball screw

42‧‧‧ Motor

43‧‧‧rail

44a, 44b‧‧‧ mobile board

50A, 50B, 50C‧‧‧cut-in feed means

51‧‧‧ball screw

52‧‧‧Motor

53‧‧‧rail

54a, 54b‧‧‧lifting plate

[Fig. 1] A schematic perspective view showing a configuration of an example of a cutting device. [Fig. 2] A schematic perspective view of a manufacturing method of a magnetic core for manufacturing a concave magnetic core. [Fig. 3] A schematic perspective view of a manufacturing method of a magnetic core for manufacturing an E-type magnetic core.

Claims (2)

A manufacturing method of a magnetic core, which is a manufacturing method of a concave magnetic core composed of a magnetic material, comprising: (1) a holding process for holding a plate-shaped magnetic body by a holding table; and a groove forming process for a predetermined width The formed first cutting blade is cut into the magnetic body held by the holding table at a predetermined cutting depth and is cut and fed in the cutting feeding direction to form a cutting groove; and the groove shaping process is made to be harder than the first cutting blade and the A second cutting blade formed by a width larger than the first cutting blade is cut into the cutting groove and cut and fed in the cutting feed direction to shape the bottom surface of the cutting groove; and the cutting process is to make the third cutting blade face the cutting The groove is cut in a direction orthogonal to the groove and cut and fed to completely cut the magnetic body. A manufacturing method of a magnetic core, which is a manufacturing method of an E-type magnetic core composed of a magnetic material, comprising: (1) a holding process for holding a plate-shaped magnetic body by a holding table; and a groove forming process for a predetermined width The first cutting blade formed by the web cuts into the magnetic body held by the holding table at a predetermined cutting depth and cuts and feeds in the cutting feed direction to form two cutting grooves; and the groove shaping process is made harder than the first cutting blade A second cutting blade formed with a width larger than the first cutting blade is cut into the two cutting grooves and is cut and fed in the cutting feed direction to shape the bottom surface shape of the two cutting grooves; and the grinding process, The upper surface of the convex portion between the two cutting grooves, or the predetermined surface that becomes the upper surface of the convex portion between the two cutting grooves, is ground; and the cutting process makes the third cutter The magnetic body is completely cut by cutting in a direction orthogonal to the two cutting grooves and cutting feed in the cutting feed direction.